CN105674640A - Adjusting device and method for matching of refrigerant charge of air conditioning system - Google Patents
Adjusting device and method for matching of refrigerant charge of air conditioning system Download PDFInfo
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- CN105674640A CN105674640A CN201410659591.3A CN201410659591A CN105674640A CN 105674640 A CN105674640 A CN 105674640A CN 201410659591 A CN201410659591 A CN 201410659591A CN 105674640 A CN105674640 A CN 105674640A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 164
- 239000003507 refrigerant Substances 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims description 32
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims abstract description 4
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- 230000001105 regulatory effect Effects 0.000 claims description 30
- 238000005192 partition Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 5
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- 239000007788 liquid Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920002943 EPDM rubber Polymers 0.000 description 4
- 229920001084 poly(chloroprene) Polymers 0.000 description 4
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
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- 229910001018 Cast iron Inorganic materials 0.000 description 2
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- 229920002449 FKM Polymers 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
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- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 229910052802 copper Inorganic materials 0.000 description 2
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- 229920001973 fluoroelastomer Polymers 0.000 description 2
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- 229920002681 hypalon Polymers 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- 229910001220 stainless steel Inorganic materials 0.000 description 2
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Abstract
The invention discloses an adjusting device for matching of the refrigerant charge of an air conditioning system. The adjusting device comprises an adjusting tank, an adjustable pressure source and a check valve, wherein an elastic separator is arranged in the adjusting tank and divides the adjusting tank into two parts which are mutually sealed, one part is used for storing gas, and the other part is used for storing refrigerant; the adjustable presume source is in fluid communication with the part, used for storing the gas, of the adjusting tank, and the pressure of the gas in the adjusting tank can be changed by controlling the adjustable pressure source; and the check valve is installed on a connecting pipeline between the part, used for storing the refrigerant, of the adjusting tank and a circulating pipeline. After the adjusting device is connected with the air conditioning system and the check valve is opened, the air pressure change in the adjusting tank makes the refrigerant charge of the air conditioning system change. The adjusting device can accurately control the refrigerant charge, can recover the refrigerant discharged out of the air conditioning system when the charge is reduced, and has no influence on the environment.
Description
Technical Field
The invention relates to an air conditioning system, in particular to matching of optimal refrigerant charge in the air conditioning system.
Background
The refrigerant charging amount is closely related to the working characteristics of the air conditioning system, the normal operation of the air conditioning system depends on whether the charged refrigerant is proper or not, if the refrigerant in the system is not charged enough, the evaporation amount of the evaporator is insufficient, the refrigerant liquid in the evaporator is evaporated into gas without completely flowing the whole course due to the flow reduction of the refrigerant, the return air temperature of the compressor is overhigh, the return air specific volume is increased, the refrigerating capacity is insufficient, the superheat degree of an outlet is overhigh, the exhaust temperature is overhigh, and the compressor is easy to cause thermal protection; if the refrigerant is excessively filled, too much refrigerant enters the condenser, the discharge pressure is too high, the liquid refrigerant flows back, the excessive refrigerant liquid is transferred into the evaporator through the capillary tube when the compressor is stopped, and the excessive refrigerant liquid is discharged out of the evaporator in a two-phase state when the compressor is restarted, so that the liquid impact phenomenon is caused.
Therefore, in the process of developing air conditioners, for different models of air conditioners, it is necessary to determine the optimum refrigerant charge matching the operating parameters of the air conditioners through experiments. In the prior art, a refrigerant is added into an air conditioning system in a direct filling mode, the accurate filling amount is difficult to control in the test process, and when the refrigerant filling amount needs to be reduced, part of the refrigerant is usually and directly released into the ambient atmosphere environment, so that the environment is not protected on one hand, and the quality of the released refrigerant is difficult to determine on the other hand.
As described above, there is a strong need in the art for an apparatus for precisely, efficiently and environmentally adjusting a refrigerant charge amount during air conditioner development.
Disclosure of Invention
The invention aims to provide an adjusting device and a method for effectively matching the refrigerant charge amount in the air conditioner development process, which can accurately control the charge amount of the refrigerant and can recover the refrigerant discharged from an air conditioning system without influencing the environment when reducing the charge amount.
According to a first aspect of the present invention, there is provided a refrigerant charge matching adjustment device for an air conditioning system including a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttle device, and a circulation pipe, the adjustment device comprising:
a conditioning tank in which a partition is provided, the partition dividing the conditioning tank into two parts sealed with each other, one of which is for storing gas and the other of which is for storing refrigerant;
an adjustable pressure source in fluid communication with the portion of the conditioning tank for storing gas, the pressure of the gas in the conditioning tank being adjustable by controlling the adjustable pressure source;
a shutoff valve installed on a connection pipe between a portion of the regulation tank for storing the refrigerant and the circulation pipe; wherein,
after the adjusting device is connected with the air conditioning system and the stop valve is opened, the pressure change of the gas in the adjusting tank can deform the partition, so that the amount of the refrigerant stored in the adjusting tank is changed, and the refrigerant charging amount of the air conditioning system is changed.
Preferably, the material from which the separator is made may be selected from one or more of the following:
neoprene (Neoprene), nitrile rubber (Buna), Ethylene Propylene Diene Monomer (EPDM), Heppalon (Hypalon), fluororubber (Viton, Aflas) and Polytetrafluoroethylene (PTFE); and/or
The material used to make the can body may be selected from one or more of the following:
cast iron, cast aluminum, carbon steel, stainless steel, copper, and alloys; and/or
The gas is nitrogen or air.
Preferably, the separator is a film structure having elasticity.
Preferably, the regulating device comprises two shut-off valves connected in series, one of which is connected to the circulation line of the air conditioning system and the other of which is connected to the portion of the regulating tank for storing refrigerant.
Preferably, the adjusting device is used in the development process of an air conditioning system, and the adjusting device can be detached from the air conditioning system after the matching of the refrigerant charge of the air conditioning system is completed.
Preferably, the two shut-off valves are closed, and the connection between the two shut-off valves can be disconnected, so that the adjusting device can be removed from the air conditioning system.
Preferably, the adjusting device is connected with the air conditioning system and the stop valve is opened to increase/decrease the charging amount of the gas in the adjusting tank, so that the refrigerant charging amount of the air conditioning system can be increased/decreased accordingly.
According to a second aspect of the present invention, there is provided a method of matching a refrigerant charge of an air conditioning system, the method comprising the steps of:
(1) providing an adjustment device as described above;
(2) charging a predetermined amount of refrigerant into the air conditioning system and/or the conditioning tank;
(3) and under the condition that the adjusting device is connected with the air conditioning system, adjusting the adjustable pressure source according to the measured performance coefficient of the air conditioning system, changing the pressure of the gas in the adjusting tank for multiple times, further changing the actual charging amount of the refrigerant in the air conditioning system, and measuring the performance coefficient of the air conditioning system each time until the performance coefficient is within an allowable error range, so as to determine the optimal charging amount of the refrigerant in the air conditioning system.
In a preferred embodiment, step (2) of the above method comprises:
(a) before the adjusting tank is connected with the air conditioning system, filling refrigerant into a part of the adjusting tank for storing the refrigerant, wherein the amount of the filled refrigerant is larger than the estimated optimal filling amount of the air conditioning system;
(b) closing the stop valve and connecting the adjusting device with the air conditioning system;
(c) opening the shut-off valve, adjusting the adjustable pressure source such that the pressure in the portion of the conditioning tank used to store gas increases, the refrigerant in the conditioning tank is forced into the air conditioning system, closing the shut-off valve, operating the air conditioning system and determining the coefficient of performance of the air conditioning system;
in the foregoing preferred embodiment, the method further comprises:
measuring the total mass M of the conditioning tank after the refrigerant is charged in the step (a)0；
After the optimum charge matching is completed, the regulating device is removed from the air conditioning system, the remaining gas in the regulating tank is released, and the total mass M of the regulating tank containing the remaining refrigerant is measuredx(ii) a Wherein,
the optimal refrigerant charge of the air conditioning system is M ═ M0-Mx。
Preferably, in the foregoing preferred embodiment, the step (3) in the foregoing method includes:
(d) repeating the operation of the step (c), increasing the amount of the refrigerant in sequence, and measuring the corresponding air conditioner performance coefficient for multiple times to obtain an interval of the optimal charging amount;
(e) opening a stop valve, adjusting the adjustable pressure source to reduce the gas pressure in the adjusting tank, so that part of the refrigerant in the air conditioning system flows back to the adjusting tank, so that the refrigerant charge in the air conditioning system falls in the interval obtained in the step (d), closing a stop valve, operating the air conditioning system and measuring the coefficient of performance of the air conditioning system;
(f) and (e) repeating the operation of the step (c) or (e), and determining the charging amount of the air-conditioning system refrigerant when the air-conditioning system performance coefficient is the highest within an allowable error range.
In another preferred embodiment, the step (2) of the method of matching a refrigerant charge amount of an air conditioning system includes:
(a') charging the air conditioning system with a refrigerant in an amount greater than an estimated optimal charge of the air conditioning system and a mass of the charged refrigerant denoted as M before the surge tank is connected to the air conditioning system1；
(b') closing said shut-off valve, connecting said regulating device to said air conditioning system;
preferably, in another preferred embodiment of the foregoing, step (3) includes:
(c') opening the stop valve, adjusting the adjustable pressure source to make the refrigerant in the air conditioning system enter the adjusting tank, closing the stop valve, operating the air conditioning system and measuring the coefficient of performance of the air conditioning system;
(d ') repeating the operation of the step (c'), reducing the amount of the refrigerant in the air-conditioning system in sequence, and measuring the corresponding air-conditioning performance coefficient for multiple times to obtain the interval of the optimal charging amount;
(e ') opening a stop valve, adjusting the adjustable pressure source, changing the gas pressure in the adjusting tank, enabling the actual filling amount of the refrigerant in the air conditioning system to fall in the interval obtained in the step (d'), changing the actual filling amount of the refrigerant in the air conditioning system in the interval for multiple times, operating the air conditioning system and measuring the performance coefficient of the air conditioning system each time until the filling amount of the refrigerant of the air conditioning system at the highest performance coefficient of the air conditioning system is determined within an allowable error range.
In still another preferred embodiment, the step (2) of the method of matching a refrigerant charge amount of an air conditioning system includes:
after the adjusting tank is connected with the air conditioning system, refrigerant is filled into the air conditioning system, the amount of the filled refrigerant is larger than the estimated optimal filling amount of the air conditioning system, and the mass of the filled refrigerant is marked as M1。
In the foregoing further preferred embodiment and further preferred embodiment, the method further comprises:
the mass of the empty conditioning tank is measured and recorded as M before the conditioning tank is connected to the air conditioning system2；
After the optimum charge matching is completed, the regulating device is removed from the air conditioning system, the remaining gas in the regulating tank is released, and the total mass M of the regulating tank containing the remaining refrigerant is measuredx'; wherein,
the optimal refrigerant charge of the air conditioning system is M ═ M1+M2-Mx’。
By adopting the adjusting device, the refrigerant is stored in the adjusting tank in advance, the flushing amount of the refrigerant in the adjusting tank to the air conditioning system can be accurately adjusted by controlling the adjustable pressure source, and the refrigerant discharged from the air conditioning system can be recycled into the adjusting tank when the filling amount needs to be reduced, so that the pollution to the environment caused by the discharge of the refrigerant into the air is avoided, the refrigerant is saved, and the refrigerant can be used for a later matching test. In addition, the two stop valves can facilitate the installation and the disassembly of the connecting device, and further avoid the leakage of the refrigerant.
Drawings
FIG. 1 is a schematic diagram of an air conditioning system refrigerant charge matching online conditioner according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
Adjusting device
As shown in fig. 1, the present invention adds a regulating device in a dashed box in the air conditioning system for matching the charge amount of refrigerant operating in the air conditioning system. As shown, the air conditioning system comprises a compressor 1, a liquid storage tank 2, a four-way valve 3, an outdoor heat exchanger 4, an indoor heat exchanger 5, a throttling device 6 and a connecting pipeline, wherein the throttling device is connected with the adjusting device at a position P on the pipeline through a three-way pipe.
The refrigerant charge amount adjusting device mainly comprises an adjusting tank 7, an adjustable pressure source 13 and stop valves 11 and 12, wherein a partition 8 for dividing the adjusting tank 7 into two parts sealed with each other is arranged in the adjusting tank 7, the part above the partition 8 in the adjusting tank 7 is used for storing gas 9, the part below the partition 8 is used for storing refrigerant 10, the top end of the adjusting tank 7 is in sealed fluid communication with the adjustable pressure source 13, and the bottom end of the adjusting tank 7 is in sealed fluid communication with the stop valve 12. The shut-off valve 11 is connected in series with the shut-off valve 12 and is connected to the air conditioning system via a connecting line.
The partition 8 may take any suitable form as long as it is capable of deforming in the respective directions in accordance with the pressure difference between the gas 9 and the refrigerant 10, thereby changing the volume of the two portions of the conditioning tank divided thereby. Preferably, the separator is a film structure having elasticity.
Preferably, the material from which the partition 8 is made may be selected from one or more of the following materials: neoprene (Neoprene), nitrile rubber (Buna), Ethylene Propylene Diene Monomer (EPDM), Heppalon (Hypalon), fluororubber (Viton, Aflas) and Polytetrafluoroethylene (PTFE).
Preferably, the material from which the can body is made may be selected from one or more of the following: cast iron, cast aluminum, carbon steel, stainless steel, copper, and alloys.
Preferably, the gas filled in the adjusting tank can be selected from nitrogen or air.
The adjustable pressure source 13 may be a nitrogen gas cylinder capable of adjusting the amount of gas charged, the gas pressure in the upper part of the adjustment tank 7 can be raised or lowered by the amount of gas charged in the adjustment tank 7, and in the case where both the shutoff valves 11 and 12 are opened, accordingly, the refrigerant in the lower part of the adjustment tank 7 is charged into the air conditioning system by causing the partition 8 to contract downward, or the partition 8 is expanded upward and the refrigerant in the air conditioning system is recovered into the adjustment tank.
It is worth noting that the adjusting device of the present invention comprises two stop valves, which makes the mounting and dismounting of the adjusting device more convenient. After a certain amount of refrigerant is filled in the adjusting tank 7, the adjustable pressure source 13 and the stop valve 12 of the adjusting device can be always connected into a whole, and when the adjusting device is installed in an air conditioning system, the stop valve 11 and the stop valve 12 are only required to be connected; when dismantling adjusting device after accomplishing the matching, only need will close stop valve 11 and 12, again with stop valve 11 with stop valve 12 disconnection can, can guarantee like this connecting and dismantling adjusting device's in-process, can not cause revealing of refrigerant, further reduce the pollution to the environment.
Matching method
In fact, with the regulating device of the invention as described above, the matching of the refrigerant charge of the air conditioning system can also be carried out in different ways and steps.
In a preferred embodiment, the matching method comprises the following steps:
(1) charging the conditioning tank with a refrigerant amount larger than the estimated optimum charging amount from the bottom of the conditioning tank before the conditioning tank is connected to the air conditioning system, and measuring the initial total weight M of the conditioning tank and the refrigerant0；
(2) The connection and the installation of the regulating device are completed until both valves 11 and 12 are closed;
(3) opening the stop valves 11 and 12, adjusting the pressure source 13 so that the air pressure in the upper part of the regulating tank 7 rises, a certain amount of refrigerant 10 is pressed into the air conditioning system, closing the stop valve 11, operating the air conditioning system and measuring the coefficient of performance COP of the air conditioning system;
(4) repeating the operation of the step (3), sequentially increasing the amount of the refrigerant, and measuring the corresponding air conditioner performance coefficient for multiple times to obtain an interval where the optimal charging amount is located;
(5) opening the stop valve 11, adjusting the pressure source 13, so that the gas in the adjusting tank 7 partially flows back to the gas source, thereby reducing the gas pressure at the upper part of the adjusting tank 7, partially flowing back the refrigerant in the air conditioning system to the lower part of the adjusting tank 7 for storage, so that the refrigerant filling amount in the air conditioning system at the moment falls in the interval obtained in the step (4), closing the stop valve 11, operating the air conditioning system and measuring the coefficient of performance COP of the air conditioning system;
(6) repeating the operation similar to the step (3) or (5), and determining the optimal charge of the air-conditioning system refrigerant within an allowable error range, namely the charge with the highest coefficient of performance (COP) of the air-conditioning system;
(7) the gas valve 12 is closed, the regulating device is removed, the remaining gas in the regulating tank is released and the total mass M of the regulating tank now containing the remaining refrigerant is measuredx。
Through the above steps, the matching value M of the refrigerant charge amount can be obtained as Mx-M0。
In another preferred embodiment, the matching method comprises the steps of:
(1) filling refrigerant into the air conditioning system before the adjusting tank is connected with the air conditioning system, wherein the amount of the filled refrigerant is more than the estimated optimal filling amount of the air conditioning system, and the mass of the filled refrigerant is marked as M1Quality of empty conditioning tank and is denoted M2；
(2) Closing the stop valve, and connecting the adjusting device with the air conditioning system;
(3) opening a stop valve, adjusting an adjustable pressure source to enable refrigerant in the air-conditioning system to enter an adjusting tank, closing a stop valve, operating the air-conditioning system and measuring the performance coefficient of the air-conditioning system;
(4) repeating the operation of the step (3), sequentially reducing the amount of the refrigerant in the air-conditioning system, and measuring the corresponding air-conditioning performance coefficient for multiple times to obtain an interval where the optimal charging amount is located;
(5) and (4) opening the stop valve, adjusting the adjustable pressure source, changing the gas pressure in the adjusting tank, enabling the actual refrigerant charge amount in the air-conditioning system to fall in the interval obtained in the step (4), changing the actual refrigerant charge amount in the air-conditioning system for multiple times in the interval, operating the air-conditioning system each time and measuring the performance coefficient of the air-conditioning system until the charge amount of the refrigerant in the air-conditioning system when the performance coefficient of the air-conditioning system is the highest is determined within an allowable error range.
(6) After the optimum charge matching is completed, the regulating device is removed from the air conditioning system, the residual gas in the regulating tank is released, and the total mass M of the regulating tank containing the residual refrigerant is measuredx’。
Through the above steps, the matching value M of the refrigerant charge amount can be obtained as M1+M2-Mx’。
In addition, after the adjusting tank is connected with the air conditioning system, refrigerant can be filled into the air conditioning system, the amount of the filled refrigerant is larger than the estimated optimal filling amount of the air conditioning system, and part of the refrigerant can enter the adjusting tank. The specific matching method is similar to the method, wherein after the adjusting tank is connected with the air conditioning system, refrigerant is charged into the air conditioning system, the amount of the charged refrigerant is larger than the estimated optimal charging amount of the air conditioning system, and the mass of the charged refrigerant is marked as M1Measuring the mass of the empty conditioning tank and recording it as M before the conditioning tank is connected to the air conditioning system2After the optimum charge matching is completed, the control device is removed from the air conditioning system, the remaining gas in the control tank is released, and the total mass M of the control tank containing the remaining refrigerant is measuredx'; the optimal refrigerant charge of the air conditioning system is M ═ M1+M2-Mx’。
As described above, it can be seen that, with the regulating device of the present invention, the refrigerant is stored in the regulating tank in advance, the flushing amount of the refrigerant in the regulating tank to the air conditioning system can be accurately adjusted by controlling the adjustable pressure source, and particularly, when the charging amount needs to be reduced, the refrigerant discharged from the air conditioning system can be recovered to the regulating tank, thereby not only avoiding the environmental pollution caused by the discharge of the refrigerant to the air, but also saving the refrigerant for the use of the later matching test. In addition, the two stop valves are arranged, so that the connecting device is convenient to mount and dismount, and the leakage of the refrigerant is further avoided.
The adjusting tank 7 may be connected to a circulation line between the outdoor heat exchanger 4 and the throttle device 6, or may be connected to a circulation line between the indoor heat exchanger 5 and the throttle device 6.
While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.
Claims (11)
1. An adjusting device for refrigerant charge matching of an air conditioning system, the air conditioning system including a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttle device, and a circulation pipe, the adjusting device comprising:
a conditioning tank in which a partition is provided, the partition dividing the conditioning tank into two parts sealed with each other, one of which is for storing gas and the other of which is for storing refrigerant;
an adjustable pressure source in fluid communication with the portion of the conditioning tank for storing gas, the pressure of the gas in the conditioning tank being adjustable by controlling the adjustable pressure source; and
a shutoff valve installed on a connection pipe between a portion of the regulation tank for storing the refrigerant and the circulation pipe; wherein,
after the adjusting device is connected with the air conditioning system and the stop valve is opened, the pressure change of the gas in the adjusting tank can deform the partition, so that the amount of the refrigerant stored in the adjusting tank is changed, and the actual refrigerant charging amount of the air conditioning system is changed.
2. The conditioning apparatus according to claim 1, characterized in that the conditioning apparatus comprises two shut-off valves connected in series, one of which is connected to a circulation pipe of the air conditioning system and the other of which is connected to a portion of the conditioning tank for storing refrigerant.
3. The conditioner of claim 1, wherein the conditioner is used in a development process of an air conditioning system, and wherein the conditioner is removable from the air conditioning system after matching a refrigerant charge of the air conditioning system.
4. A method of matching refrigerant charge of an air conditioning system, the method comprising the steps of:
(1) providing an adjustment device according to claim 1 or 2;
(2) charging a predetermined amount of refrigerant into the air conditioning system and/or the conditioning tank;
(3) and under the condition that the adjusting device is connected with the air conditioning system, adjusting the adjustable pressure source according to the measured performance coefficient of the air conditioning system, changing the pressure of the gas in the adjusting tank for multiple times, further changing the actual charging amount of the refrigerant in the air conditioning system, and measuring the performance coefficient of the air conditioning system each time until the performance coefficient is within an allowable error range, so as to determine the optimal charging amount of the refrigerant in the air conditioning system.
5. The method of claim 4, wherein step (2) comprises:
(a) before the adjusting tank is connected with the air conditioning system, filling refrigerant into a part of the adjusting tank for storing the refrigerant, wherein the amount of the filled refrigerant is larger than the estimated optimal filling amount of the air conditioning system;
(b) closing the stop valve and connecting the adjusting device with the air conditioning system;
(c) opening the shut-off valve, adjusting the adjustable pressure source so that the gas pressure in the portion of the conditioning tank for storing gas increases, pressing the refrigerant in the conditioning tank into the air conditioning system, closing the shut-off valve, operating the air conditioning system and determining the coefficient of performance of the air conditioning system.
6. The method of claim 5, further comprising:
measuring the total mass M of the conditioning tank after the refrigerant is charged in the step (a)0；
After the optimum charge matching is completed, the regulating device is removed from the air conditioning system, the remaining gas in the regulating tank is released, and the total mass M of the regulating tank containing the remaining refrigerant is measuredx(ii) a Wherein,
the optimal refrigerant charge of the air conditioning system is M ═ M0-Mx。
7. The method of claim 5, wherein step (3) comprises:
(d) repeating the operation of the step (c), increasing the amount of the refrigerant in sequence, and measuring the corresponding air conditioner performance coefficient for multiple times to obtain an interval of the optimal charging amount;
(e) opening a stop valve, adjusting the adjustable pressure source to reduce the gas pressure in the adjusting tank, so that part of the refrigerant in the air conditioning system flows back to the adjusting tank, so that the refrigerant charge in the air conditioning system falls in the interval obtained in the step (d), closing a stop valve, operating the air conditioning system and measuring the coefficient of performance of the air conditioning system;
(f) and (e) repeating the operation of the step (c) or (e), and determining the charging amount of the air-conditioning system refrigerant when the air-conditioning system performance coefficient is the highest within an allowable error range.
8. The method of claim 4, wherein step (2) comprises:
(a') charging the air conditioning system with a refrigerant in an amount greater than an estimated optimal charge of the air conditioning system and a mass of the charged refrigerant denoted as M before the surge tank is connected to the air conditioning system1；
(b') closing the shut-off valve and connecting the regulating device to the air conditioning system.
9. The adjustment method according to claim 8, characterized in that step (3) comprises:
(c') opening the stop valve, adjusting the adjustable pressure source to make the refrigerant in the air conditioning system enter the adjusting tank, closing the stop valve, operating the air conditioning system and measuring the coefficient of performance of the air conditioning system;
(d ') repeating the operation of the step (c'), reducing the amount of the refrigerant in the air-conditioning system in sequence, and measuring the corresponding air-conditioning performance coefficient for multiple times to obtain the interval of the optimal charging amount;
(e ') opening a stop valve, adjusting the adjustable pressure source, changing the gas pressure in the adjusting tank, enabling the actual filling amount of the refrigerant in the air conditioning system to fall in the interval obtained in the step (d'), changing the actual filling amount of the refrigerant in the air conditioning system in the interval for multiple times, operating the air conditioning system and measuring the performance coefficient of the air conditioning system each time until the filling amount of the refrigerant of the air conditioning system at the highest performance coefficient of the air conditioning system is determined within an allowable error range.
10. The method of claim 4, wherein step (2) comprises:
after the adjusting tank is connected with the air conditioning system, refrigerant is filled into the air conditioning system, the amount of the filled refrigerant is larger than the estimated optimal filling amount of the air conditioning system, and the mass of the filled refrigerant is marked as M1。
11. The method according to claim 8 or 10, characterized in that the method further comprises:
the mass of the empty conditioning tank is measured and recorded as M before the conditioning tank is connected to the air conditioning system2；
After the optimum charge matching is completed, the regulating device is removed from the air conditioning system, the remaining gas in the regulating tank is released, and the total mass M of the regulating tank containing the remaining refrigerant is measuredx'; wherein,
the optimal refrigerant charge of the air conditioning system is M ═ M1+M2-Mx’。
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| CN201410659591.3A CN105674640B (en) | 2014-11-18 | 2014-11-18 | The flux matched regulating device of air-conditioning system refrigerant charging and method |
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| CN201410659591.3A CN105674640B (en) | 2014-11-18 | 2014-11-18 | The flux matched regulating device of air-conditioning system refrigerant charging and method |
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| CN105674640B CN105674640B (en) | 2018-04-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113357856A (en) * | 2021-06-07 | 2021-09-07 | 青岛海尔空调器有限总公司 | Refrigerant filling matching adjusting device of air conditioning system and control method |
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| CN107036209A (en) * | 2017-04-12 | 2017-08-11 | 美的集团武汉制冷设备有限公司 | Air conditioner |
| CN113357856A (en) * | 2021-06-07 | 2021-09-07 | 青岛海尔空调器有限总公司 | Refrigerant filling matching adjusting device of air conditioning system and control method |
| CN113357856B (en) * | 2021-06-07 | 2022-09-06 | 青岛海尔空调器有限总公司 | Refrigerant filling matching adjusting device of air conditioning system and control method |
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| CN105674640B (en) | 2018-04-17 |
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