CN114812023B - Mixed working medium filling adjusting system - Google Patents
Mixed working medium filling adjusting system Download PDFInfo
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- CN114812023B CN114812023B CN202210503557.1A CN202210503557A CN114812023B CN 114812023 B CN114812023 B CN 114812023B CN 202210503557 A CN202210503557 A CN 202210503557A CN 114812023 B CN114812023 B CN 114812023B
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- 239000003507 refrigerant Substances 0.000 claims abstract description 220
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 238000003860 storage Methods 0.000 claims abstract description 79
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009530 blood pressure measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a working medium filling system, in particular to a mixed working medium filling regulating system, which comprises a refrigerant liquid storage tank, a refrigerant system pipeline, a vacuum pump and a gas collecting tank, wherein the refrigerant liquid storage tank is connected with the refrigerant system pipeline; the refrigerant liquid storage tank is respectively communicated with the air inlet end of the vacuum pump and the refrigerant system pipeline through pipelines, and the air outlet end of the vacuum pump is communicated with the air collection tank through pipelines; the refrigerant liquid storage tank is arranged at a height higher than that of the refrigerant system pipeline; after the vacuum pump vacuumizes the refrigerant liquid storage tank, the refrigerant enters the refrigerant liquid storage tank under the action of negative pressure and then enters the refrigerant system pipeline under the action of gravity. Compared with the prior art, the refrigerant filling regulating system fills low-pressure refrigerant into the mixed refrigerant circulating pipeline by utilizing the pressure balancing method and the gravity action; can solve the problems of filling and adjusting the proportion of low-pressure refrigerant into the mixed refrigerant circulating pipeline.
Description
Technical Field
The invention relates to a working medium filling system, in particular to a mixed working medium filling adjusting system.
Background
Mixed refrigerants are typically composed of two or more refrigerants of different saturation pressures, also known as zeotropic mixed refrigerants, the ratio of the components of which determines the efficiency and operating temperature range of the refrigeration system. The existing non-azeotropic mixed refrigerant filling method needs to accurately calculate the proportion of the refrigerant and then sequentially fill the system from low to high according to the saturation pressure.
At present, the method for filling the mixed working medium refrigerant is to fill the low-pressure refrigerant first and then fill the high-pressure refrigerant. The mass of each refrigerant needs to be accurately measured before charging, and low pressure refrigerant cannot be charged and adjusted after charging. For example, the invention patent with publication number CN106566476a is directed to a mixed refrigerant of R142b (saturation pressure is 0.195 MPa), R134a (saturation pressure is 0.401 MPa), and R22 (saturation pressure is 0.661 MPa), and after the refrigeration system is evacuated, the required proportion of R142b liquid refrigerant is poured first, then the required proportion of liquid R134a refrigerant is poured, and finally the required proportion of liquid R22 refrigerant is poured. If the refrigerant charge amount is calculated to be deviated or the refrigerant leaks, all the refrigerant should be discharged, and the refrigerant is charged again according to the method, so that the proportion of each refrigerant is ensured to be unchanged. The patent filling process needs to be carried out through the steps of filling low pressure firstly and then filling high pressure, and the like, low-pressure refrigerant cannot be continuously filled and regulated in the later period, and once deviation occurs in calculation or leakage occurs, the refrigerant in the system needs to be discharged, so that the waste of the refrigerant and the environmental pollution are caused. In order to solve the problems, a mixed working medium filling adjusting system is provided.
Disclosure of Invention
The invention aims to solve at least one of the problems and provide a mixed working medium filling and adjusting system, which utilizes the height difference between a refrigerant liquid storage tank and a refrigerant system pipeline to fill low-pressure refrigerant into the refrigerant system pipeline, solves the problem that the low-pressure refrigerant cannot be filled and adjusted when the refrigerant filling amount is deviated or the refrigerant leaks, thereby reducing the waste of the refrigerant and the environmental pollution, reducing the cost of the refrigerant and facilitating the operation of the refrigeration system.
The aim of the invention is achieved by the following technical scheme:
a mixed working medium filling and adjusting system comprises a refrigerant liquid storage tank, a refrigerant system pipeline, a vacuum pump and a gas collecting tank;
The refrigerant liquid storage tank is respectively communicated with the air inlet end of the vacuum pump and the refrigerant system pipeline through pipelines, and the air outlet end of the vacuum pump is communicated with the air collection tank through a pipeline;
the refrigerant liquid storage tank is arranged at a height higher than that of a refrigerant system pipeline;
after the vacuum pump vacuumizes the refrigerant liquid storage tank, the refrigerant enters the refrigerant liquid storage tank under the action of negative pressure and then enters the refrigerant system pipeline under the action of gravity.
Preferably, the refrigerant liquid storage tank is arranged at a height 30-50cm higher than the refrigerant system pipeline.
Preferably, the system further comprises a lifting platform, wherein the lifting platform is arranged below the refrigerant liquid storage tank and is used for adjusting the height of the refrigerant liquid storage tank.
Preferably, the system further comprises a weighing electronic scale, wherein the weighing electronic scale is arranged below the refrigerant liquid storage tank and is used for weighing the mass of the refrigerant in the refrigerant liquid storage tank.
Preferably, the precision of the weighing electronic scale is 1g.
Preferably, the exhaust amount of the vacuum pump is not lower than 20L/min; the vacuumizing time is at least 1h, and the vacuum degree in the refrigerant liquid storage tank is less than or equal to 10Pa.
Preferably, a manifold pressure gauge is further arranged between the vacuum pump and the refrigerant liquid storage tank, and the vacuum pump and the manifold pressure gauge and the refrigerant liquid storage tank are connected through pressure hoses.
Preferably, the vacuum degree measuring range of the low pressure side of the manifold manometer is 0-101kPa, the pressure measuring scale is started from 0kPa, and the measuring range is not lower than 2110kPa; the pressure measurement scale of the high pressure side of the manifold manometer starts from 0kPa and the measuring range is not lower than 4200kPa.
Preferably, the top of the refrigerant liquid storage tank is communicated with a refrigerant system pipeline through a pipeline, and a ball valve is arranged on the pipeline; the top of the refrigerant liquid storage tank is communicated with the refrigerant system pipeline by opening the ball valve, so that the internal pressure of the refrigerant liquid storage tank and the refrigerant system pipeline is balanced.
Preferably, a check valve is arranged on a pipeline connecting the vacuum pump and the gas collection tank, and a ball valve and a check valve are sequentially arranged on a pipeline connecting the refrigerant liquid storage tank and the refrigerant system pipeline.
Preferably, the top of the refrigerant liquid storage tank is also provided with a safety valve, a thermometer and a pressure gauge.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention has the advantages that the low-pressure refrigerant to be filled can be determined by weighing the electronic scale in the first step; the second step fills the low-pressure refrigerant into a refrigerant liquid storage tank in advance, vacuumizes the refrigerant liquid storage tank by using a vacuum pump, closes the vacuum pump and a valve thereof after vacuumization is finished, and opens the valves of the refrigerant liquid storage tank and a filling tank (namely a storage tank which stores the corresponding refrigerant and is used for filling the refrigerant into the refrigerant liquid storage tank), thereby completing filling of the low-pressure refrigerant; and after the third step of filling, closing a valve of the filling tank, connecting the refrigerant liquid storage tank with a refrigerating system, opening the valve between the refrigerant liquid storage tank and the refrigerating system, and filling low-pressure refrigerant into a pipeline of the mixed refrigerant system by utilizing gravity. The whole process is simple, the effect is unified, the problem that if the refrigerant charging amount is calculated to be the current deviation or the refrigerant leaks, the low-pressure refrigerant cannot be continuously charged and regulated is solved, the waste of the refrigerant and the environmental pollution are reduced, the cost of the refrigerant is reduced, and the operation of a refrigerating system is facilitated.
2. The lifting table is arranged at the lower part of the refrigerant liquid storage tank, so that the refrigerant liquid storage tank can be adjusted according to the required height; the weighing electronic scale is arranged at the lower part of the refrigerant liquid storage tank, so that the refrigerant addition amount can be accurately measured, and accurate control is facilitated; the refrigerant system pipeline is communicated with the top end of the refrigerant liquid storage tank in an air pressure mode, pressure difference can be avoided when the refrigerant is injected into the refrigerant system pipeline, and therefore the refrigerant can be smoothly injected into the refrigerant system pipeline.
3. The invention charges the refrigerant into the mixed refrigerant circulation pipeline through the balance pressure and gravity, not only can be used as a conventional system for adding the refrigerant, but also can supplement the low-pressure refrigerant when the problem of the filling amount is found, thereby overcoming the problem that the refrigerant needs to be mixed from the beginning once the error occurs in the prior art, avoiding the waste of the refrigerant and reducing the pollution to the environment.
Drawings
FIG. 1 is a schematic diagram of a conditioning system of the present invention;
In the figure: 1-a refrigerant liquid storage tank; 2-refrigerant system piping; 3-a vacuum pump; 4-a gas collection tank; 5-lifting platform; 6-weighing the electronic scale; 7-manifold manometer; 8-ball valve; 9-check valve; 10-a safety valve; 11-thermometer; 12-pressure gauge.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Fig. 1 shows a schematic diagram of the novel mixed working medium filling regulating system, which comprises a refrigerant liquid storage tank 1, a lifting table 5, a check valve 9, a weighing electronic scale 6, a vacuum pump 3, a gas collection tank 4, a manifold manometer 7, a ball valve 8, a safety valve 10, a thermometer 11 and a pressure gauge 12.
In the novel mixed working medium filling and adjusting system, the weighing electronic scale 6 is arranged below the low-pressure refrigerant liquid storage tank 1, the electronic scale precision is more than 1g, the required low-pressure refrigerant filling amount can be accurately weighed, and the quality change can be measured in real time when the refrigerant is filled into the refrigerant system pipeline 2, so that the filling amount can be better controlled, and the filling requirement can be met.
In the novel mixed working medium filling adjusting system, the lifting table 5 is arranged below the refrigerant liquid storage tank 1, and the height of the lifting table 5 is adjusted through the driving motor (the lifting table 5 can be internally provided or can be connected with an external driving motor to realize the driving of the lifting table 5), so that the refrigerant liquid storage tank 1 is lifted or lowered to be 30-50cm higher than the mixed refrigerant system pipeline 2.
In the novel mixed working medium filling and adjusting system, the mixed refrigerant system pipeline 2 is connected with the upper part of the refrigerant liquid storage tank 1 through the ball valve 8, so that the pressure intensity of the refrigerant liquid storage tank 1 and the mixed refrigerant system pipeline 2 can be balanced.
In the novel mixed working medium filling and adjusting system, the refrigerant is filled into the refrigerant liquid storage tank 1 in advance, and the refrigerant liquid storage tank 1 is provided with the ball valve 8 connected with the refrigerating system.
In the novel mixed working medium filling and adjusting system, the refrigerant liquid storage tank 1 is connected with the mixed refrigerant system pipeline 2 of the refrigerating system through the ball valve 8 and the check valve 9, and is used for injecting the refrigerant into the refrigerant system pipeline 2.
In the novel mixed working medium filling and adjusting system, the refrigerant liquid storage tank 1 is vacuumized to the required pressure for the required time (at least 1 h), the vacuum pumping is performed, the system vacuum degree is ensured to be less than or equal to 10Pa, and the gas vacuumized by the vacuum pump 3 is discharged to the gas collection tank 4.
In the novel mixed working medium filling and adjusting system, the ball valve 8 and the check valve 9 between the refrigerant liquid storage tank 1 and the refrigerant system pipeline 2 are opened, so that low-pressure refrigerant enters the refrigerant system pipeline 2 through gravity, and refrigerant filling is completed.
In the novel mixed working medium filling and adjusting system, the ball valve 8 and the check valve 9 are connected with the mixed refrigerant system pipeline 2 of the refrigerating system through welding or a bell mouth, the refrigerating system is a self-cascade refrigerating system, and the refrigerant is a multi-element mixed refrigerant.
To further illustrate the novel mixed working fluid filling regulating system, the present invention employs the following examples to illustrate specific operational implementations.
Example 1
Referring to fig. 1, the refrigerant is an environment-friendly ternary non-azeotropic high condensing temperature refrigerant, and is characterized in that: the mixed refrigerant comprises mixed refrigerant of R142b (saturation pressure is 0.195 MPa), R134a (saturation pressure is 0.401 MPa) and R22 (saturation pressure is 0.661 MPa), wherein the sum of the mass percent concentration of each component in the mixed refrigerant is 100%, the mass percent of R142b is 5-35%, the mass percent of R134a is 1-10%, and the mass percent of R22 is 60-90%; in this embodiment, the mass percentage of R142b is 15%, the mass percentage of R134a is 10%, and the mass percentage of R22 is 75%. Assuming that the refrigeration system lacks low-pressure refrigerant R134a, it is necessary to charge R134a refrigerant, the set low-pressure R134a refrigerant charge is about 62g, and the volume of the known liquid storage tank is about 17L. The amount of low pressure refrigerant is matched to the refrigeration system.
In this embodiment, a novel mixed working medium filling adjusting system is adopted to fill low-pressure refrigerant into a refrigeration system, and the filling method comprises the following steps:
1) As shown in fig. 1, the instrument checks: whether equipment and instruments such as the refrigerant liquid storage tank 1, the lifting platform 5, the check valve 9, the weighing electronic scale 6, the vacuum pump 3, the gas collection tank 4, the manifold pressure gauge 7, the ball valve 8, the safety valve 10, the thermometer 11, the pressure gauge 12 and the like are damaged or leaked is checked, and if damaged, the equipment and the instruments should be replaced in time. A lifting table 5 is arranged below the refrigerant liquid storage tank 1, so that the refrigerant liquid storage tank 1 is lifted or lowered to be 30-50cm higher than the mixed refrigerant system pipeline 2, and the refrigerant liquid storage tank 1 is controlled to be about 40cm higher than the refrigerant system pipeline 2 in the embodiment.
2) As shown in fig. 1, the refrigerant liquid storage tank 1 is evacuated: opening a ball valve 8, and connecting the high pressure side of the manifold pressure gauge 7 with a hand valve of the vacuum pump 3 by using a hose; closing all ball valves 8 except the pipeline connecting the vacuum pump 3 and the refrigerant liquid storage tank 1, opening a hand valve of the vacuum pump 3 and a high-pressure side hand valve of the manifold pressure gauge 7, and starting the vacuum pump 3 to start vacuumizing operation; the duration of the vacuumizing is more than 1h, the duration is longer, the vacuumizing is performed, the system vacuum degree is ensured to be less than or equal to 10Pa, and the gas pumped out by the vacuum pump 3 is discharged into the gas collecting tank 4; during the evacuation process, the thermometer 11 and the pressure gauge 12 in the upper portion of the refrigerant receiver 1 are observed at a moment, and immediately stopped once abnormality is found. After the evacuation is completed, the vacuum pump 3 is turned off, and the high-pressure side pressure-resistant hose of the manifold pressure gauge 7 is detached.
3) As shown in fig. 1, the charge refrigerant enters the refrigerant reservoir 1: the low pressure side of the manifold pressure gauge 7 is connected with a refrigerant charging tank (a tank body storing low pressure R134a for charging the low pressure R134a into the refrigerant liquid storage tank 1, taking fig. 1 as an example, the charging tank is a source of refrigerant charging) by a pressure-resistant hose; firstly, exhausting air of a hose, unscrewing the connection part of the hose and the low-pressure side of the manifold pressure gauge 7, opening a valve of the refrigerant charging tank, at the moment, hearing hissing sound at the unscrewed connection part of the hose and the low-pressure side of the manifold pressure gauge 7, and when white gas is seen to appear, closing the valve of the refrigerant charging tank, at the moment, exhausting air in the hose by utilizing the refrigerant; after the vacuum pumping, the interior of the refrigerant liquid storage tank 1 is in a vacuum state, at the moment, only the opening degree of the manual valve at the low pressure side of the manifold pressure gauge 7 is increased, the ball valve 8 is opened, the refrigerant is automatically pressed into the refrigerant liquid storage tank 1, the weighing electronic scale 6 below the refrigerant liquid storage tank 1 is observed according to the required low-pressure refrigerant filling amount (the low-pressure refrigerant amount is matched with a refrigerating system), and when the filling amount is close to the required refrigerant amount, the opening degree of the manual valve at the low pressure side of the manifold pressure gauge 7 is reduced until the manual valve is closed. At the end of filling, the ball valve 8 is closed.
4) As shown in fig. 1, low-pressure refrigerant of the refrigerant receiver 1 enters the mixed refrigerant system pipe 2: when the low-pressure refrigerant is filled, the ball valve 8 is opened to balance the pressure of the refrigerant liquid storage tank 1 and the pressure of the mixed refrigerant system pipeline 2, the ball valve 8 and the check valve 9 are opened to enable the low-pressure refrigerant filled into the refrigerant liquid storage tank 1 to flow into the mixed refrigerant system pipeline 2 under the action of gravity, and the low-pressure refrigerant enters a refrigerating system to finish the operation.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (9)
1. The mixed working medium filling regulating system is characterized by comprising a refrigerant liquid storage tank (1), a refrigerant system pipeline (2), a vacuum pump (3) and a gas collecting tank (4);
the refrigerant liquid storage tank (1) is respectively communicated with the air inlet end of the vacuum pump (3) and the refrigerant system pipeline (2) through pipelines, and the air outlet end of the vacuum pump (3) is communicated with the air collection tank (4) through a pipeline;
The refrigerant liquid storage tank (1) is arranged at a height higher than that of the refrigerant system pipeline (2);
After the vacuum pump (3) vacuumizes the refrigerant liquid storage tank (1), the refrigerant enters the refrigerant liquid storage tank (1) under the action of negative pressure and then enters the refrigerant system pipeline (2) under the action of gravity;
The top of the refrigerant liquid storage tank (1) is communicated with a refrigerant system pipeline (2) through a pipeline, and a ball valve (8) is arranged on the pipeline; the top of the refrigerant liquid storage tank (1) is communicated with the refrigerant system pipeline (2) by opening the ball valve (8), so that the internal pressures of the refrigerant liquid storage tank (1) and the refrigerant system pipeline (2) are balanced;
A ball valve (8) and a check valve (9) are sequentially arranged on a pipeline connecting the refrigerant liquid storage tank (1) and the refrigerant system pipeline (2);
When the low-pressure refrigerant is completely filled in the refrigerant liquid storage tank (1), the ball valve (8) is opened to balance the pressure of the refrigerant liquid storage tank (1) and the pressure of the mixed refrigerant system pipeline (2), and then the ball valve (8) and the check valve (9) are opened to enable the low-pressure refrigerant filled in the refrigerant liquid storage tank (1) to flow into the mixed refrigerant system pipeline (2) under the action of gravity, and the low-pressure refrigerant enters the refrigerating system to finish the operation.
2. A mixed working fluid filling regulating system according to claim 1, wherein the refrigerant liquid storage tank (1) is arranged at a height of 30-50cm higher than the refrigerant system pipeline (2).
3. A mixed working fluid filling regulating system according to claim 1, further comprising a lifting table (5) arranged below the refrigerant reservoir (1) for regulating the height of the refrigerant reservoir (1).
4. A mixed working fluid filling regulating system according to claim 1, further comprising a weighing electronic scale (6), wherein the weighing electronic scale (6) is arranged below the refrigerant liquid storage tank (1) and is used for weighing the mass of the refrigerant in the refrigerant liquid storage tank (1).
5. A mixed working fluid filling regulating system according to claim 4, wherein the accuracy of the weighing electronic scale (6) is 1g.
6. The mixed working medium filling regulating system according to claim 1, wherein the exhaust amount of the vacuum pump (3) is not lower than 20L/min; the vacuumizing time is at least 1h, and the vacuum degree in the refrigerant liquid storage tank (1) is less than or equal to 10Pa.
7. The mixed working medium filling regulating system according to claim 1, wherein a manifold pressure gauge (7) is further arranged between the vacuum pump (3) and the refrigerant liquid storage tank (1), and the vacuum pump (3) and the manifold pressure gauge (7) and the refrigerant liquid storage tank (1) are connected through pressure hoses.
8. The mixed working medium filling regulating system according to claim 7, wherein the vacuum degree measuring range of the low pressure side of the manifold pressure gauge (7) is 0-101kPa, the pressure measuring scale is started from 0kPa, and the measuring range is not lower than 2110kPa; the pressure measurement scale of the high pressure side of the manifold pressure gauge (7) is started from 0kPa, and the measuring range is not lower than 4200kPa.
9. A mixed working fluid filling regulating system according to claim 1, characterized in that a check valve (9) is arranged on the pipeline connecting the vacuum pump (3) and the gas collection tank (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210503557.1A CN114812023B (en) | 2022-05-09 | 2022-05-09 | Mixed working medium filling adjusting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210503557.1A CN114812023B (en) | 2022-05-09 | 2022-05-09 | Mixed working medium filling adjusting system |
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| CN114812023A CN114812023A (en) | 2022-07-29 |
| CN114812023B true CN114812023B (en) | 2024-05-31 |
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| CN202210503557.1A Active CN114812023B (en) | 2022-05-09 | 2022-05-09 | Mixed working medium filling adjusting system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807262A (en) * | 2015-05-05 | 2015-07-29 | 上海佐竹冷热控制技术有限公司 | Refrigerating agent filling and recovering system and refrigerating agent filling and recovering method for vehicle air conditioner test system |
| CN111981732A (en) * | 2020-07-24 | 2020-11-24 | 中标能效科技（北京）有限公司 | Automatic refrigerant filling device and method |
| CN215983383U (en) * | 2021-10-19 | 2022-03-08 | 宁波奥克斯电气股份有限公司 | Refrigerant charging device and refrigeration equipment |
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- 2022-05-09 CN CN202210503557.1A patent/CN114812023B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807262A (en) * | 2015-05-05 | 2015-07-29 | 上海佐竹冷热控制技术有限公司 | Refrigerating agent filling and recovering system and refrigerating agent filling and recovering method for vehicle air conditioner test system |
| CN111981732A (en) * | 2020-07-24 | 2020-11-24 | 中标能效科技（北京）有限公司 | Automatic refrigerant filling device and method |
| CN215983383U (en) * | 2021-10-19 | 2022-03-08 | 宁波奥克斯电气股份有限公司 | Refrigerant charging device and refrigeration equipment |
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