CN100567850C - Full-liquid type water-icing machine - Google Patents
Full-liquid type water-icing machine Download PDFInfo
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- CN100567850C CN100567850C CNB2006100806494A CN200610080649A CN100567850C CN 100567850 C CN100567850 C CN 100567850C CN B2006100806494 A CNB2006100806494 A CN B2006100806494A CN 200610080649 A CN200610080649 A CN 200610080649A CN 100567850 C CN100567850 C CN 100567850C
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Abstract
The invention relates to a kind of full-liquid type water-icing machine, it has a compressor, a condenser, a control valve for refrigerant flow, an evaporimeter and a controller.Compressor has more a temperature detecting device, then has a pressure detection device on the condenser.Control valve for refrigerant flow is connected between condenser and the evaporimeter, enters the cold medium flux of evaporimeter in order to control.Controller calculates according to the condenser pressure value and get the compressor target temperature that spues, and the compressor target actual temperature that spues of a compressor that temperature detecting device on temperature and the compressor measured that spues relatively, to determine an aperture of control valve for refrigerant flow.In addition, a kind of refrigerant liquid level control method of full-liquid type water-icing machine evaporimeter also discloses simultaneously.
Description
Technical field
The present invention relates to a kind of full-liquid type water-icing machine, particularly relate to a kind of full-liquid type water-icing machine with automatic control refrigerant liquid level.
Background technology
Day by day progressive along with science and technology, people are for the requirement of daily life comfortableness also day by day raising.The basic demand of comfortable living environment promptly is comfortable indoor temperature, so that people's physical efficiency is cosily worked and had a rest under such environment.In addition, also usually need the temperature that provides lower for the preservation of food with making.
Therefore, also day by day progress of the technology of refrigerating and air conditioning.For large-scale central air conditioning equipment, usually use the frozen water machine of forming by motor, compressor, heat exchanger and coolant expansion apparatus etc., with with after the frozen water cooling, send into pressure fan or air-conditioning box with air cooling-down by the ice water circulation system, cold wind is delivered to the place that needs cold air by airduct again.And frozen water machine power consumption generally also be whole central air conditioner system.So the efficient of frozen water machine just is the running efficiency of whole central air-conditioning of concerning.How to improve the operating efficiency of frozen water machine, can save the required energy effectively.
The frozen water machine can be divided into centrifugal, spiral, reciprocating type and scroll-type etc. if distinguish with the pattern of compressor.If then can be divided into water-cooled, ventilation type and transpiration-cooled etc. with the condenser differentiation.If then can be divided into direct-expansion type (direct expansion type) and full-liquid type (flooded type) or the like again as distinguishing with evaporimeter.
Wherein, the efficient of full-liquid type water-icing machine is better than the efficient of direct-expansion type frozen water machine, therefore becomes at present the preferable selection of the employed frozen water machine of central air-conditioning gradually.
Yet, when full-liquid type water-icing machine in when running, its refrigerant liquid level control is a very important key technology.No matter under fully loaded, unloading, load change state, refrigerant liquid level in the evaporimeter just in time covers and goes up row's copper pipe most, will help refrigerant and water to do heat exchange under saturated evaporating temperature condition, makes it have the highest efficient.If when the refrigerant liquid level was too high, not only ability and efficient can not increase, worry on the contrary to have liquid the backflow, cause compressor damage.
The known full-liquid type water-icing machine of part adopts electronic expansion valve to add the liquid level sensor and does liquid level control.Though, under the condition of fully loaded standard, can very accurately control refrigerant target liquid level, the interior refrigerant liquid level of evaporimeter just is dipped into goes up row's copper pipe most.Yet during real-world operation, because of the variation relation of load, compressor has different operation modes, for example is to turn round under the situations such as, two-shipper unloading fully loaded at two-shipper, unit are fully loaded, unit unloading.Therefore, when real-world operation, different running situations often causes original target liquid level of setting, also need to be done the situation of revising slightly, if when still controlling expansion valve with the simple target liquid level, under some running situation, the refrigerant liquid level there is no method and covers and go up row's copper pipe most, not only can not bring into play maximal efficiency, also lose the meaning of full-liquid type water-icing machine simultaneously.
Therefore, though the known full-liquid type water-icing machine of part adopts LS, measure the poor of desired value and actual liquid level height, and then control required refrigerant liquid level.Yet under the situation of practical operation, because load variations makes compressor must regulate output capacity, it will cause liquid level can't reach object height, so that can not give full play to the maximal efficiency of heat exchanger.
This shows that above-mentioned existing full-liquid type water-icing machine obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks the road that solves painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of full-liquid type water-icing machine of new structure, just becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing full-liquid type water-icing machine exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of full-liquid type water-icing machine of new structure, can improve general existing full-liquid type water-icing machine, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The objective of the invention is to, overcome the defective that existing full-liquid type water-icing machine exists, and provide a kind of full-liquid type water-icing machine of new structure, technical problem to be solved is to make it utilize the pressure that measures condenser, estimate the compressor temperature that spues, and then the control cold medium flux, guaranteeing the refrigerant liquid level of evaporimeter, thereby be suitable for practicality more.
Another object of the present invention is to, a kind of full-liquid type water-icing machine of new structure is provided, technical problem to be solved is to make it utilize price comparatively cheap and have a temperature detecting tolerance measured compressed machine outlet temperature of high-reliability, with the control cold medium flux and guarantee the refrigerant liquid level of evaporimeter, and then replace expensive LS, effectively reduce the manufacturing cost of full-liquid type water-icing machine, thereby be suitable for practicality more.
A further object of the present invention is, a kind of full-liquid type water-icing machine of new structure is provided, and technical problem to be solved is to make it utilize temperature detecting tolerance measured compressed machine outlet temperature, takes place to avoid liquid situation about refluxing, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of full-liquid type water-icing machine that the present invention proposes, comprise at least: a compressor has a temperature detecting device on it; One condenser connects this compressor, has a pressure detection device on this condenser; One control valve for refrigerant flow is connected in this condenser; One evaporimeter is connected in this control valve for refrigerant flow; An and controller, be connected in this pressure detection device on this control valve for refrigerant flow, this condenser and this temperature detecting device on this compressor, obtain a condenser pressure value from this pressure detection device, and calculate according to this condenser pressure value and to get the compressor target temperature that spues, this compressor target actual temperature that spues of a compressor that this temperature detecting device on temperature and this compressor is measured that spues relatively, to determine an aperture of this control valve for refrigerant flow, make the interior refrigerant liquid level of this evaporimeter be higher than the height of the copper pipe in this evaporimeter.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid full-liquid type water-icing machine, wherein said control valve for refrigerant flow comprises an electronic expansion valve.
Aforesaid full-liquid type water-icing machine, wherein said controller comprise a programmable controller.
Aforesaid full-liquid type water-icing machine, the wherein said compressor target temperature that spues is to estimate the temperature that spues for a compressor to add that a predetermined temperature difference gets.
Aforesaid full-liquid type water-icing machine, it is to be got by check table that wherein said compressor is estimated the temperature that spues, this table of comparisons is to be stored in advance in the memory body of this controller.
It is to be calculated and got by a computing formula that aforesaid full-liquid type water-icing machine, wherein said compressor are estimated the temperature that spues, and this computing formula is to be stored in advance in the memory body of this controller.
Aforesaid full-liquid type water-icing machine, wherein said computing formula is to be TD=f (Pc)=b0+b1Pc, and wherein TD is the theory temperature that spues, this condenser pressure value that Pc measures for this pressure detection device, and b0:2.00-4.00, and b1:4.00-6.00.
Aforesaid full-liquid type water-icing machine, wherein said computing formula is to be TD=f (Pc, Pe)=a0+a1Pc+a2Pe, wherein TD is the theory temperature that spues, this condenser pressure value that Pc measures for this pressure detection device, and the value of evaporator pressure that Pe measures for the pressure detection device on this evaporimeter, and a0:6.00-9.00, a1:4.00-6.00, and a2:-2.00--0.50.
Aforesaid full-liquid type water-icing machine is wherein estimated when spuing temperature when the actual temperature that spues of described compressor is lower than this compressor, and this controller starts a liquid back flow protection program.
Aforesaid full-liquid type water-icing machine, wherein when the actual temperature that spues of described compressor was lower than this compressor target and spues temperature, this controller downgraded this aperture of this control valve for refrigerant flow.
Aforesaid full-liquid type water-icing machine, wherein when the actual temperature that spues of described compressor was higher than this compressor target and spues temperature, this controller increased this aperture of this control valve for refrigerant flow.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
In order to achieve the above object, the invention provides a kind of full-liquid type water-icing machine, include a compressor, a condenser, a control valve for refrigerant flow, an evaporimeter and a controller.Wherein have a temperature detecting device on the compressor, then have a pressure detection device on the condenser.Control valve for refrigerant flow is connected between condenser and the evaporimeter, enters the cold medium flux of evaporimeter in order to control.
Controller then connects pressure detection device on control valve for refrigerant flow, the condenser and the temperature detecting device on the compressor, and obtain a condenser pressure value from the pressure detection device, calculate according to the condenser pressure value and to get the compressor target temperature that spues, the compressor target actual temperature that spues of a compressor that temperature detecting device on temperature and the compressor is measured that spues relatively is to determine an aperture of control valve for refrigerant flow.
Wherein, control valve for refrigerant flow is preferably and is electronic expansion valve, and controller preferably then is to be the programmable controller.It is that a compressor is estimated the temperature that spues and added that a predetermined temperature difference gets that the compressor target spues that temperature then is preferably.This compressor is estimated the temperature that spues and can be decided via the comparison list that inquiry one is stored in the memory body of controller in advance.This compressor is estimated the temperature that spues and also can be decided via the computing formula in the memory body that is stored in controller in advance.
Above-mentioned computing formula can only be a formula relevant with the condenser pressure value, for example be TD=f (Pc)=b0+b1Pc, wherein TD is the theory temperature that spues, and Pc is the condenser pressure value that the pressure detection device measures, and b0:2.00-4.00, and b1:4.00-6.00.Above-mentioned computing formula can also be a formula relevant with value of evaporator pressure with the condenser pressure value, for example be TD=f (Pc, Pe)=a0+a1Pc+a2Pe, wherein Pc is the condenser pressure value that the pressure detection device measures, and Pe is the value of evaporator pressure that the pressure detection device on the evaporimeter measures, and a0:6.00-9.00, a1:4.00-6.00, and a2:;-2.00--0.50.
In addition, the temperature that spues is lower than compressor and estimates when spuing temperature when compressor is actual, and controller more can start a liquid back flow protection program.Generally speaking, spue temperature when being lower than the compressor target and spuing temperature when compressor is actual, controller downgrades the aperture of control valve for refrigerant flow.Spue temperature when being higher than the compressor target and spuing temperature when compressor is actual, and controller increases the aperture of control valve for refrigerant flow.
In addition, in order to achieve the above object, the present invention provides a kind of refrigerant liquid level control method of full-liquid type water-icing machine evaporimeter in addition.The refrigerant liquid level control method of this full-liquid type water-icing machine evaporimeter includes the following step, at first measures a saturated condensing pressure of the condenser of full-liquid type water-icing machine, and according to saturated condensing pressure, to obtain the compressor target temperature that spues.Measure the actual temperature and spue temperature relatively of spuing of a compressor of compressor, to adjust an aperture of a control valve for refrigerant flow with the compressor target.Wherein the compressor target temperature that spues preferably also is to estimate the temperature that spues for a compressor to add that a predetermined temperature difference gets.
The refrigerant liquid level control method of this full-liquid type water-icing machine evaporimeter more can be utilized to store comparison list in advance in the memory body of the controller of full-liquid type water-icing machine, and estimates the temperature that spues in order to calculate compressor.Perhaps utilize and store a computing formula in advance in the memory body of the controller of full-liquid type water-icing machine, and estimate the temperature that spues in order to calculate compressor.
Above-mentioned computing formula can only be a formula relevant with the condenser pressure value, for example is TD=f (Pc)=b0+b1Pc, and wherein TD is the theory temperature that spues, and Pc is the condenser pressure value, and b0:2.00-4.00, and b1:4.00-6.00.Above-mentioned computing formula can also be a formula relevant with value of evaporator pressure with the condenser pressure value, for example be TD=f (Pc, Pe)=a0+a1Pc+a2Pe, wherein Pc is the condenser pressure value, and Pe is a value of evaporator pressure, and a0:6.00-9.00, a1:4.00-6.00, and a2:-2.00--0.50.
Generally speaking, spue temperature when being lower than the compressor target and spuing temperature, downgrade the aperture of control valve for refrigerant flow, and spue temperature when being higher than the compressor target and spuing temperature, increase the aperture of control valve for refrigerant flow when compressor is actual when compressor is actual.
The refrigerant liquid level control method of full-liquid type water-icing machine evaporimeter of the present invention more can comprise an initial operation step and a liquid back flow protection step.The initial operation step is to use when starting full-liquid type water-icing machine, downgrades the aperture of control valve for refrigerant flow earlier, causes compressor to produce the phenomenon that hydraulic pressure contracts to avoid liquid the backflow.Liquid back flow protection step then is to be lower than compressor in the actual temperature that spues of compressor to estimate when spuing temperature, starts the initial operation step once more, causes compressor to produce the phenomenon that hydraulic pressure contracts to avoid liquid the backflow.
Via as can be known above-mentioned, the present invention is relevant for a kind of full-liquid type water-icing machine, and it has a compressor, a condenser, a control valve for refrigerant flow, an evaporimeter and a controller.Compressor has more a temperature detecting device, then has a pressure detection device on the condenser.Control valve for refrigerant flow is connected between condenser and the evaporimeter, enters the cold medium flux of evaporimeter in order to control.Controller calculates according to the condenser pressure value and get the compressor target temperature that spues, and the compressor target actual temperature that spues of a compressor that temperature detecting device on temperature and the compressor measured that spues relatively, to determine an aperture of control valve for refrigerant flow.
By technique scheme, full-liquid type water-icing machine of the present invention has following advantage at least:
Full-liquid type water-icing machine of the present invention and refrigerant liquid level control method can be utilized the outlet temperature of detecting compressor and the saturated condensing pressure of condenser, carry out the control of the refrigerant liquid level of evaporimeter.Therefore, full-liquid type water-icing machine of the present invention and refrigerant liquid level control method can utilize price comparatively cheap and have a temperature detecting tolerance measured compressed machine outlet temperature of high-reliability, to replace expensive LS, effectively reduce the manufacturing cost of full-liquid type water-icing machine, more can avoid liquid situation about refluxing to take place simultaneously effectively.Therefore, full-liquid type water-icing machine of the present invention and the cooling effectiveness that not only can increase full-liquid type water-icing machine promote the efficient of central air conditioner system, and can prolong the service life of full-liquid type water-icing machine simultaneously.
In sum, the present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing full-liquid type water-icing machine has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the control flow chart for the refrigerant liquid level of full-liquid type water-icing machine of the present invention.
Fig. 2 is the preferred embodiment schematic diagram for full-liquid type water-icing machine of the present invention.
110～180: step 210: compressor
212: temperature detecting device 220: condenser
222: pressure detection device 230: electronic expansion valve
240: evaporimeter 242: the pressure detection device
250: controller 252: memory body
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its specific embodiment of full-liquid type water-icing machine, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Full-liquid type water-icing machine of the present invention, it is the temperature detecting device that utilizes low price and have high-reliability, measure compressor exit temperature, with the control cold medium flux and guarantee the refrigerant liquid level of evaporimeter, not only can reduce the manufacturing cost of full-liquid type water-icing machine effectively, can also effectively avoid the liquid situation about refluxing of full-liquid type water-icing machine to take place.Below will and describe in detail and clearly demonstrate spirit of the present invention with diagram, as the person skilled in the art after understanding preferred embodiment of the present invention, when can be by the technology of teachings of the present invention, change and modification, it does not break away from spirit of the present invention and scope.
Seeing also shown in Figure 1ly, is the control flow chart for the refrigerant liquid level of full-liquid type water-icing machine of the present invention.Fig. 2 then is the preferred embodiment schematic diagram for full-liquid type water-icing machine of the present invention.
Please consult Fig. 1 and shown in Figure 2 simultaneously, step 110 is to start full-liquid type water-icing machine, and step 120 then is the protection step for initial operation.After starting full-liquid type water-icing machine, full-liquid type water-icing machine carries out initial operation, and it downgrades and limit cold medium flux, avoiding producing liquid situation about refluxing, and then the service life of protection compressor.
Next enter step 130, promptly carry out the measurement of saturated condensing pressure, just utilize the pressure of the pressure detection device 222 measurement condensers (condenser) 220 among Fig. 2.It can also utilize pressure detection device 242 simultaneously, to measure the pressure of evaporimeter (evaporator) 240.Wherein the pressure detection device can also utilize the temperature detecting tolerance to survey saturation temperature, uses the corresponding force value that converts, and it does not also break away from spirit of the present invention.
Then the target temperature that spues is calculated and estimated to step 140, just estimates the temperature that spues of compressor.The control of the refrigerant liquid level of full-liquid type water-icing machine of the present invention is by after the operating pressure that measures evaporimeter 240 and condenser 220, utilizes the mode of check table or computing formula, to estimate the outlet temperature of compressor 210.
The compressor exit temperature that below will describe check table of the present invention and computing formula in detail estimates mode.
The table of comparisons one:
Referring to the table of comparisons one, the table of comparisons one is by pressure-enthalpy chart (pressure-enthalpy figure; PH figure) insentrope on estimates and forms.The pressure P c=6.5Kg/cm2 that for example works as the condenser 220 that measures and get, and measure and during the pressure P e=2.0Kg/cm2 of evaporimeter 240, insentrope and pressure line Pc=6.5Kg/cm2 via this saturated vapor point-rendering refrigerant intersect, can obtain theory and spue temperature T D=31.7 ℃, it can be as the compressor 210 temperature controlled lower-limit temperature value that spues, be referred to as compressor and estimate the temperature that spues, be back to compressor 210 effectively to prevent liquid refrigerants.Via the insentrope of detailed drafting different pressures, can try to achieve theory under the situation of the different pressures temperature T D value that spues, with as the temperature controlled standard of spuing of compressor 210.These theories of knowing by inference temperature T D value that spues is imported controller 250 respectively, for example is in the memory body 252 of a programmable controller.Full-liquid type water-icing machine of the present invention can pressure detection device 222,242 measure respectively and behind the pressure of freezing machine 220 and evaporimeter 240, estimate compressor 210 temperature that spues via check table, the temperature that spues of the actual compressor of measuring via the temperature detecting device 212 on the compressor 210 with step 150 210 compares again, to control the aperture of cold medium flux valve in step 160, it for example is an electronic expansion valve 230, and then the refrigerant liquid level of adjustment evaporimeter 240, make the efficient thereby the lifting of full-liquid type water-icing machine.
As mentioned above, the controller 250 of full-liquid type water-icing machine of the present invention estimates the temperature that spues of compressor 210 except the mode that can utilize check table, it can also utilize the formula calculation mode, estimating the temperature that spues of compressor 210, and then controls the aperture of cold medium flux valve continuously.
At first, with each pressure data in the table of comparisons one with estimate the target temperature substitution theory temperature equation that spues:
TD=f (Pc, Pe)=a0+a1Pc+a2Pe......... formula (1)
And, can try to achieve via the calculating of linear regression:
a0：6.00-9.00
a1：4.00-6.00
a2：-2.00--0.50
The error of this calculated value and check table method is only within ± 2%.The data of observing wherein can find again | a2| is less than or equal to 0.5|a1| approximately, and Pe approximates 0.28Pc, and for example a certain embodiment, when Pe=2.5kg/cm2, Pc approximates 9.0kg/cm2.
So | a2 * Pe| approximates 0.14|a1 * Pc|, and then the theory temperature equation TD that spues can be reduced to:
TD=f (Pc)=b0+b1Pc......... formula (2)
So | a2 * Pe| also might be littler than 0.14|a1 * Pc|, after calculating, can get through the linear regression of another time, wherein:
b0：2.00-4.00
b1：4.00-6.00
The error of this calculated value and check table method is approximately only within ± 4.5%.
Therefore, in practical application, full-liquid type water-icing machine of the present invention more only requirement is surveyed saturated condensing pressure Pc, can try to achieve the theory temperature T D that spues, and spue temperature T D as the compressor temperature controlled lower limit (T) that spues with this theory, and with actual compressor 210 spue temperature relatively, with the aperture of control cold medium flux valve.Since the temperature that spues of compressor 210 of the present invention can further simplify become only relevant with saturated condensing pressure, temperature and saturated condensing pressure are made the table of comparisons so also can only theory be spued, in the memory body 252 of input controller 250, estimate the temperature that spues to be used for calculating compressor.
When in fact turning round, be safety and the refrigerant liquid level of controlling effectively in the evaporimeter 240, more can set one and spue temperature upper limit (T+ Δ t) as the compressor target temperature that spues.And the lowest temperature value (T) that spues promptly is that compressor is estimated the temperature that spues, and whether the actual temperature that spues of compressor that is used as step 170 is lower than the spue criterion of temperature of lower limit, with as the liquid control temperature that refluxes of protection.Wherein, Δ t is a predetermined temperature difference, can adjust according to different type of machines, nonidentity operation condition appropriateness, and its suitableeest preferred values is 0-6.0 ℃, stably to guarantee the refrigerant liquid level in the evaporimeter 240, can be higher than the height of copper pipe effectively.
Full-liquid type water-icing machine of the present invention; can only utilize the condensing pressure that measures condenser 220; can estimate the compressor temperature that spues; and utilize this to estimate compressor to spue temperature for protecting the liquid lower limit temperature control that refluxes; add that a predetermined temperature difference (Δ t) is as the compressor target temperature controlling normal temperature that spues; to carry out the refrigerant level control of evaporimeter 240; not only can simplify the refrigerant level control of full-liquid type water-icing machine effectively; more can reduce the manufacturing cost of full-liquid type water-icing machine; while also exempts to produce liquid situation about refluxing; effectively promote the cooling effectiveness of frozen water machine; reaching the purpose of energy savings, and more can improve the service life of frozen water machine.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (11)
1, a kind of full-liquid type water-icing machine is characterized in that it comprises at least:
One compressor has a temperature detecting device on it;
One condenser connects this compressor, has a pressure detection device on this condenser;
One control valve for refrigerant flow is connected in this condenser;
One evaporimeter is connected in this control valve for refrigerant flow; And
One controller, be connected in this pressure detection device on this control valve for refrigerant flow, this condenser and this temperature detecting device on this compressor, obtain a condenser pressure value from this pressure detection device, and calculate according to this condenser pressure value and to get the compressor target temperature that spues, this compressor target actual temperature that spues of a compressor that this temperature detecting device on temperature and this compressor is measured that spues relatively, to determine an aperture of this control valve for refrigerant flow, make the interior refrigerant liquid level of this evaporimeter be higher than the height of the copper pipe in this evaporimeter.
2, full-liquid type water-icing machine according to claim 1 is characterized in that wherein said control valve for refrigerant flow comprises an electronic expansion valve.
3, full-liquid type water-icing machine according to claim 1 is characterized in that wherein said controller comprises a programmable controller.
4, full-liquid type water-icing machine according to claim 1 is characterized in that the wherein said compressor target temperature that spues is that a compressor is estimated the temperature that spues and added that a predetermined temperature difference gets.
5, full-liquid type water-icing machine according to claim 4 is characterized in that it is to be got by check table that wherein said compressor is estimated the temperature that spues, and this table of comparisons is to be stored in advance in the memory body of this controller.
6, full-liquid type water-icing machine according to claim 4 is characterized in that it is to be calculated and got by a computing formula that wherein said compressor is estimated the temperature that spues, and this computing formula is to be stored in advance in the memory body of this controller.
7, full-liquid type water-icing machine according to claim 6, it is characterized in that wherein said computing formula is TD=f (Pc)=b0+b1Pc, wherein TD is the theory temperature that spues, this condenser pressure value that Pc measures for this pressure detection device, and b0:2.00-4.00, and b1:4.00-6.00.
8, full-liquid type water-icing machine according to claim 6, it is characterized in that wherein said computing formula is to be TD=f (Pc, Pe)=a0+a1Pc+a2Pe, wherein TD is the theory temperature that spues, this condenser pressure value that Pc measures for this pressure detection device, and the value of evaporator pressure that Pe measures for the pressure detection device on this evaporimeter, and a0:6.00-9.00, a1:4.00-6.00, and a2:-2.00--0.50.
9, full-liquid type water-icing machine according to claim 4 is characterized in that wherein estimating when spuing temperature when the actual temperature that spues of this compressor is lower than this compressor, and this controller starts a liquid back flow protection program.
10, full-liquid type water-icing machine according to claim 1 is characterized in that wherein this controller downgrades this aperture of this control valve for refrigerant flow when the actual temperature that spues of this compressor is lower than this compressor target and spues temperature.
11, full-liquid type water-icing machine according to claim 1 is characterized in that wherein this controller increases this aperture of this control valve for refrigerant flow when the actual temperature that spues of this compressor is higher than this compressor target and spues temperature.
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| TWI401402B (en) * | 2010-11-09 | 2013-07-11 | Ind Tech Res Inst | Refrigerant liquid level control method for flooded evaporator |
| CN102032731B (en) * | 2010-12-08 | 2013-08-14 | 海尔集团公司 | Central air conditioner and method for controlling flow of refrigerant therein |
| US9677795B2 (en) * | 2012-12-21 | 2017-06-13 | Trane International Inc. | Refrigerant management in a HVAC system |
| CN103363749A (en) * | 2013-08-05 | 2013-10-23 | 上海理工大学 | Method for controlling refrigerant mass flow rate through saturated isentropic compression exhaust temperature difference |
| CN103697642B (en) * | 2013-12-31 | 2016-06-01 | 上海爱控自动化设备有限公司 | A kind of energy-conservation automatic control in refrigeration method of condenser and system |
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| CN101078569A (en) | 2007-11-28 |
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