CN114215734B - Low-pressure working medium complete recovery system and recovery method for compressor testing device - Google Patents
Low-pressure working medium complete recovery system and recovery method for compressor testing device Download PDFInfo
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- CN114215734B CN114215734B CN202111306102.2A CN202111306102A CN114215734B CN 114215734 B CN114215734 B CN 114215734B CN 202111306102 A CN202111306102 A CN 202111306102A CN 114215734 B CN114215734 B CN 114215734B
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- recovery
- pressure
- working medium
- low
- recovered
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- 238000011084 recovery Methods 0.000 title claims abstract description 111
- 238000012360 testing method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 239000003507 refrigerant Substances 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000004064 recycling Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/18—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use for specific elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
Abstract
The invention belongs to the technical field of compressor refrigeration, and particularly relates to a low-pressure working medium complete recovery system and a recovery method for a compressor testing device. The invention comprises a sample machine module to be recovered, a liquid reservoir and a bypass passage, wherein the bypass passage comprises a recovery tank, a first liquid inlet passage of the recovery tank is communicated to the sample machine module to be recovered through a vacuum pump, and a liquid outlet passage of the recovery tank is communicated to the liquid reservoir through a working medium pump; a compression condensing unit which plays a compression condensing function is also arranged on the recovery tank, and pressure controllers are respectively arranged at the position of the sample machine module to be recovered and the position of the recovery tank; the invention has the advantages of quick and complete recovery of low-pressure refrigerant; the invention also provides a recovery method based on the system, so that the high efficiency and the high stability of the actual recovery process are ensured.
Description
Technical Field
The invention belongs to the technical field of compressor refrigeration, and particularly relates to a low-pressure working medium complete recovery system and a recovery method for a compressor testing device.
Background
The compressor testing device needs to constantly test the replacement of the prototype. The conventional refrigerant recovery machine can stably operate at an inlet pressure of more than 80kPa, and the limiting capacity is 50kPa at an inlet, so that the refrigerant cannot be continuously and effectively recovered once the pressure is lower than the inlet pressure; once discharged, the novel low-pressure refrigerant is extremely expensive, so that the environment is polluted, and huge economic waste is caused. The refrigerant recovery mode of the conventional recovery machine is adopted independently in the prior art, and the refrigerant recovery mode has the characteristics of long time consumption and insufficient recovery. For enterprises pursuing efficiency and reducing cost, the device capable of rapidly and completely recycling the low-pressure refrigerant has very important significance, and is also a technical problem to be solved urgently in the current compressor refrigeration industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a low-pressure working medium complete recovery system for a compressor testing device, which has the advantages of being capable of rapidly and completely recovering low-pressure refrigerant, and can avoid the environmental pollution and economic waste possibly caused by the fact that the low-pressure refrigerant cannot be completely recovered; another object of the present invention is to provide a recycling method based on the above system, thereby ensuring high efficiency and high stability of the actual recycling process.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a compressor testing arrangement is with complete recovery system of low pressure working medium, includes waiting to retrieve prototype module and reservoir each other through gaseous direct recovery passageway intercommunication, arranges the recoverer on the recovery passageway to open and close this recovery passageway through the ooff valve, its characterized in that: the system also comprises a bypass passage, wherein the bypass passage comprises a recovery tank, a first liquid inlet passage of the recovery tank is communicated to a sample machine module to be recovered through a vacuum pump, and a liquid outlet passage of the recovery tank is communicated to a liquid reservoir through a working medium pump; and a compression condensing unit which plays a compression condensing function is also arranged on the recovery tank, and pressure controllers are respectively arranged at the position of the sample machine module to be recovered and the position of the recovery tank.
Preferably, a first switch valve V1, a recovery machine and a second switch valve V2 are sequentially arranged in the direct gas recovery passage along the low-pressure working medium flowing direction; the inlet end of the first liquid inlet passage is directly communicated with a sample machine module to be recovered, and a third switch valve V3, a vacuum pump and a fourth switch valve V4 are sequentially arranged along the low-pressure working medium flowing direction; the seventh switch valve V7, the working medium pump and the sixth switch valve V6 are sequentially arranged on the liquid outlet passage along the flowing direction of the low-pressure working medium.
Preferably, a pressure gauge P1 is also arranged on the first liquid inlet passage.
Preferably, the recovery tank is further provided with a liquid direct recovery passage, one end of the liquid direct recovery passage is connected with the sample machine module to be recovered, and the other end of the liquid direct recovery passage is sequentially provided with a first switch valve V1 and a fifth switch valve V5 along the low-pressure working medium flowing direction and is finally communicated to the recovery tank.
Preferably, the pressure controller comprises a first pressure controller HP1 and a second pressure controller HP2, wherein the first pressure controller HP1 is used for monitoring the pressure in the recovery tank and starting and stopping the compressor condensing unit, and the second pressure controller HP2 is used for monitoring the pressure in a model machine module to be recovered and starting and stopping the recovery machine in time.
Preferably, a recovery method of a low-pressure working medium complete recovery system for a compressor testing device is characterized by comprising the following steps:
1) When the pressure of the refrigerant in the sample machine module to be recovered is greater than 1Bar, the liquid direct recovery passage is in a conducting state, and the low-pressure working medium of the liquid in the sample machine module to be recovered directly enters the recovery tank;
2) When the refrigerant pressure in the sample machine module to be recovered and the tank to be recovered are balanced, the gas direct recovery passage is communicated, and the gaseous low-pressure working medium in the sample machine module to be recovered directly enters the liquid reservoir under the action of the recovery machine;
3) After the pressure of the refrigerant in the sample recovery module is reduced to 0.8Bar, the first switch valve V1 is opened, and the first liquid inlet passage is opened; and (3) starting the compression condensing unit, and starting the vacuum pump to completely recover the low-pressure working medium in the model machine module to be recovered when the pressure in the recovery tank is reduced to 1 Bar.
Preferably, after the step 3), when the liquid level in the recovery tank reaches the specified height, the liquid outlet passage is opened, and the liquid refrigerant in the recovery tank is filled into the liquid reservoir.
The invention has the beneficial effects that:
1) By the scheme, the invention overcomes the defect that the recovery speed of the novel low-pressure refrigerant is low and the refrigerant cannot be completely recovered under the current refrigerant substitution background; the invention can achieve the purpose of rapidly and completely recycling the low-pressure working medium through the coupling control of the recycling machine and the vacuum pump.
2) In actual operation, the depressurization control of the recovery tank can be realized by the compression condensing unit, namely, the depressurization effect is realized by monitoring the operation of the compression condensing unit by the pressure controller; the pressure reduction effect can also be realized by directly recycling the liquid through a channel, namely, the recycling tank and the liquid storage are communicated by the recycling machine. The operation mode is flexible and controllable, and the working reliability and the recovery efficiency can be effectively ensured.
3) For the refrigerating system, the vacuumizing operation is performed after the refrigerant is recovered, and besides the refrigerant is recovered, the vacuum pump in the invention can also perform the vacuumizing operation on the atmosphere by the vacuum pump outlet, and the module to be recovered does not need to be additionally provided with a vacuum pump.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a drawing of a recovery speed line of a conventional refrigerant machine;
FIG. 3 is a drawing of a recovery rate line graph of the present invention.
The actual correspondence between each label and the component name of the invention is as follows:
10-model machine module to be recovered 20-liquid reservoir 30-recovery machine 40-recovery tank
50-vacuum pump 60-working medium pump 70-compression condensing unit
Detailed Description
For ease of understanding, the specific structure and operation of the present invention will be further described herein with reference to FIGS. 1-3:
the specific structure of the invention is shown in figure 1, and the main structure of the invention comprises a recovery machine 30, a vacuum pump 50, a compression condensing unit 70, a working medium pump 60, a recovery tank 40 and a liquid reservoir 20; wherein:
a first switch valve V1, a recycling machine 30 and a second switch valve V2 are sequentially connected between the sample module to be recycled 10 and the liquid reservoir 20. The first switching valve V1 and the fifth switching valve V5 constitute a liquid direct recovery passage; the first switching valve V1, the recovery machine 30, and the second switching valve V2 constitute a direct gas recovery path. A first liquid inlet passage is also arranged between the prototype module to be recovered 10 and the recovery tank 40. The pressure gauge P1, the third switching valve V3, the vacuum pump 50 and the fourth switching valve V4 are sequentially arranged on the first liquid inlet passage. A liquid outlet passage is further extended from the recovery tank 40, and a seventh switch valve V7, a working medium pump 60 and a sixth switch valve V6 are sequentially arranged on the liquid outlet passage, and the liquid outlet passage is communicated to the liquid reservoir 20. HP1 and HP2 are two sets of pressure controllers.
The specific working flow of the invention is as follows:
1) When the first pressure controller HP1 detects that the pressure of the recovery tank 40 is more than 1Bar, the contact is closed, and the compression condensing unit 70 is controlled to start; when the first pressure controller HP1 detects that the pressure of the recovery tank 40 is less than or equal to 1Bar, the contact is opened, the compression condensing unit 70 is stopped, and the first condition for starting the vacuum pump 50 is met;
or under the condition that the compression condensing unit 70 is not used, the first switch valve V1 is closed, the fifth switch valve V5 is opened, the recovery machine 30 is opened to ensure that the pressure of the recovery tank 40 is less than or equal to 1Bar, and the recovery tank can also be used as the vacuum pump 50 to meet the first starting condition;
2) The second pressure controller HP2 detects that the pressure of the sample machine module 10 to be recovered is more than 1Bar, the contact is closed, and the recovery machine 30 is controlled to start; when the second pressure controller HP2 detects that the sampler module 10 to be recovered is less than or equal to 0.8Bar, the contact is disconnected, the recovery machine 30 is disconnected, and the second condition for starting the vacuum pump 50 is met;
3) When the pressure of the refrigerant in the sample machine module 10 to be recovered is more than 1Bar, the liquid direct recovery passage is in a conducting state, and the low-pressure liquid working medium in the sample machine module 10 to be recovered directly enters the recovery tank 40; after the pressure in the recovery prototype module 10 and the pressure in the recovery tank 40 are balanced, the gas is directly recovered and passed to the liquid reservoir 20; after the pressure of the refrigerant in the sample module 10 to be recovered is reduced to 1Bar and the starting condition of the vacuum pump 50 in the above step is satisfied, the vacuum pump 50 is started to completely recover the low-pressure working medium in the sample module 10 to be recovered.
4) When the liquid level in the recovery tank 40 reaches the designated height, the liquid outlet passage is opened, and the liquid refrigerant in the recovery tank 40 is filled into the liquid reservoir 20.
The control and judgment flow in refrigerant recovery of the present invention is shown in table 1 below:
examples:
for the field condition of a certain device, as for the conventional refrigerant recovery, namely, as shown in fig. 2, after the operation is performed for 1 hour, the pressure change of the system to be recovered is not obvious, and the recovery machine can not recover. And in fig. 3, namely, the refrigerant recovery speed of the invention is obviously improved, and the effect is obvious.
It will be understood by those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, but includes other specific forms of the same or similar structures that may be embodied without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
The technical sections of the present invention that are not described in detail are known in the art.
Claims (6)
1. The utility model provides a complete recovery system of low pressure working medium for compressor testing arrangement, includes waiting to retrieve prototype module (10) and reservoir (20) each other through gaseous direct recovery passageway intercommunication, arranges on the recovery passageway and retrieves machine (30) to open and close this recovery passageway through the ooff valve, its characterized in that: the system also comprises a bypass passage, wherein the bypass passage comprises a recovery tank (40), a first liquid inlet passage of the recovery tank (40) is communicated to the position of the model machine module (10) to be recovered through a vacuum pump (50), and a liquid outlet passage of the recovery tank (40) is communicated to the position of the liquid reservoir (20) through a working medium pump (60); a compression condensing unit (70) which plays a compression condensing function is also arranged on the recovery tank (40), and pressure controllers are respectively arranged at the sample module (10) to be recovered and the recovery tank (40);
the recovery tank (40) is further provided with a liquid direct recovery passage, one end of the liquid direct recovery passage is connected with the sample machine module to be recovered, and the other end of the liquid direct recovery passage is sequentially provided with a first switch valve V1 and a fifth switch valve V5 along the low-pressure working medium flowing direction and is finally communicated to the recovery tank (40).
2. The system for complete recovery of low-pressure working medium for a compressor testing apparatus according to claim 1, wherein: a first switch valve V1, a recovery machine (30) and a second switch valve V2 are sequentially arranged in the gas direct recovery passage along the low-pressure working medium flowing direction; the inlet end of the first liquid inlet passage is directly communicated with a sample machine module (10) to be recovered, and a third switch valve V3, a vacuum pump (50) and a fourth switch valve V4 are sequentially arranged along the low-pressure working medium flowing direction; the seventh switch valve V7, the working medium pump (60) and the sixth switch valve V6 are sequentially arranged on the liquid outlet passage along the flowing direction of the low-pressure working medium.
3. The system for complete recovery of low-pressure working medium for a compressor testing apparatus according to claim 2, wherein: the first liquid inlet passage is also provided with a pressure gauge P1.
4. A low-pressure working medium complete recovery system for a compressor testing apparatus according to claim 1, 2 or 3, wherein: the pressure controller comprises a first pressure controller HP1 and a second pressure controller HP2, wherein the first pressure controller HP1 is used for monitoring the pressure in the recovery tank (40) and starting and stopping the compressor condensing unit (70), and the second pressure controller HP2 is used for monitoring the pressure in the model machine module (10) to be recovered and starting and stopping the recovery machine (30) in time.
5. A recovery method of a low-pressure working medium complete recovery system for a compressor test apparatus according to claim 1 or 2 or 3, characterized by comprising the steps of:
1) When the pressure of the refrigerant in the sample machine module (10) to be recovered is greater than 1Bar, the liquid direct recovery passage is in a conducting state, and the low-pressure working medium of the liquid in the sample machine module (10) to be recovered directly enters the recovery tank (40);
2) When the refrigerant pressure in the sample module (10) to be recovered and the tank (40) to be recovered are balanced, the direct recovery passage of the gas is conducted, and the gaseous low-pressure working medium in the sample module (10) to be recovered directly enters the liquid reservoir (20) under the action of the recovery machine;
3) After the pressure of the refrigerant in the sample recovery module (10) is reduced to 0.8Bar, the first switch valve V1 is disconnected, and the first liquid inlet passage is opened; and (3) starting the compression condensing unit (70), and starting the vacuum pump (50) to completely recycle the low-pressure working medium in the sample module (10) to be recycled when the pressure in the tank (40) to be recycled is reduced to 1 Bar.
6. The recycling method according to claim 5, characterized in that: 3) After the step, when the liquid level in the recovery tank (40) reaches the designated height, a liquid outlet passage is opened, and the liquid refrigerant in the recovery tank (40) is filled into the liquid reservoir (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306102.2A CN114215734B (en) | 2021-11-05 | 2021-11-05 | Low-pressure working medium complete recovery system and recovery method for compressor testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306102.2A CN114215734B (en) | 2021-11-05 | 2021-11-05 | Low-pressure working medium complete recovery system and recovery method for compressor testing device |
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| Publication Number | Publication Date |
|---|---|
| CN114215734A CN114215734A (en) | 2022-03-22 |
| CN114215734B true CN114215734B (en) | 2024-03-19 |
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| CN202111306102.2A Active CN114215734B (en) | 2021-11-05 | 2021-11-05 | Low-pressure working medium complete recovery system and recovery method for compressor testing device |
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| CN114215734A (en) | 2022-03-22 |
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