CN106642849B - Method and structure for preventing compressor of refrigerant recovery equipment from failure - Google Patents
Method and structure for preventing compressor of refrigerant recovery equipment from failure Download PDFInfo
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- CN106642849B CN106642849B CN201510717104.9A CN201510717104A CN106642849B CN 106642849 B CN106642849 B CN 106642849B CN 201510717104 A CN201510717104 A CN 201510717104A CN 106642849 B CN106642849 B CN 106642849B
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Abstract
A method for preventing compressor from failure of refrigerant recovery equipment and its structure are disclosed, which features that after the gas, liquid or gas-liquid refrigerant is recovered, it is automatically discharged via an oil discharge channel of compressor by an automatic oil discharge valve to prevent the damage of compressor caused by excessive oil quantity or decrease of refrigerant recovery efficiency.
Description
Technical Field
The invention relates to a compressor of a refrigerant recovery device, which prevents the fault of the compressor caused by the accumulation of excessive refrigeration oil.
Background
According to the Monte Lou convention, since the production and use of oxygen-containing CFCs (carbon fiber reinforced plastics) refrigerants which can destroy the ozone layer are regulated in 1996, R-12 refrigerants and R-22 refrigerants are replaced by R-134a and R-410a, the destructive power of the refrigerants on the ozone layer is greatly reduced, but the influence of the greenhouse effect potential is not eliminated, so that negative influence can still be generated on the environment when the refrigerants are dissipated into the atmosphere, and in order to avoid the problem, the existence of a refrigerant recycling machine has the importance of no erasability.
As shown in fig. 1, the refrigerant recycling machine 1 is mainly composed of a cross-over pipeline 11, a compression device 12, a storage 13, and an external storage 14, and recycles the refrigerant from the refrigeration air-conditioning system, and the refrigerant enters the above-mentioned equipment through a high-pressure pipeline 111 and a low-pressure pipeline 112 included in the cross-over pipeline 11, is compressed and processed by the compression device 12, and is finally stored in the storage 13 or sent out of the equipment and stored in the external storage 14, thereby achieving the purpose of recycling.
In addition, generally, the refrigerant in the refrigerating and air-conditioning system must be mixed with the refrigerant oil for operation, so that the recovered refrigerant, whether in a gas state or a liquid state, contains a considerable amount of refrigerant oil, and the refrigerant oil is contaminated by a large amount or a small amount due to long-term operation, so that the recovered refrigerant must enter a first oil separator 122 before passing through a compressor 121 of the compression device 12 to separate the refrigerant from the refrigerant oil, thereby preventing the recovered refrigerant from being contaminated by the refrigerant oil, and the refrigerant must be separated again by the first oil separator 122 after being compressed by the compressor 121 of the recovery device, and then mixed with the refrigerant oil inside the compressor 121, thereby preventing the compressor 121 from being damaged due to loss of the refrigerant oil, but when the refrigerant recovery device 1 is continuously used, the freezing oil is accumulated in the compressor 121, and the compressor 121 cannot be operated because the compressor 121 cannot discharge the excessive freezing oil, so that the compressor 121 is automatically damaged due to the excessive freezing oil after a period of time.
Referring to fig. 2, a compression device 12 of the refrigerant recycling machine 1 includes a first oil separator 122, a second oil separator 123 and a compressor 121, so as to filter and separate the refrigerant oil contained in the recycled refrigerant, and achieve the purpose of purifying the refrigerant, wherein a window 124 is respectively disposed in the first oil separator 122 and the compressor 121, and an oil discharge device 125 is respectively disposed in the window 124, so that the first oil separator 122 and the compressor 121 can be respectively observed through the window 124, when the amount of oil is excessive, the oil in the first oil separator 122 can be discharged through the oil discharge device 125, thereby preventing the damage of components and the poor refrigerant recycling effect caused by the excessive oil discharged into all pipelines, and avoiding the excessive amount of refrigerant oil in the first oil separator 122, the refrigerant purification effect is affected, meanwhile, the refrigerant oil still flows into the compressor 121, so that the refrigerant compressed by the compressor 121 still contains a large amount of refrigerant oil and loses the purpose of the first oil separator 122, moreover, although the second oil separator 123 can separate the compressed refrigerant oil again and introduce the separated refrigerant into the compressor 121, such circulation will cause excessive loss of the first oil separator 122 and the second oil separator 123, and when the compressor 121 is filled with the refrigerant oil, the compressor 121 loses the compression function and flows into the second oil separator 123 or other pipelines, thereby causing pollution and damage of parts, and it is known that the conventional compression device 12 indeed has the disadvantages of poor refrigerant purification effect and damage of parts due to excessive refrigerant oil, and the window 124 is arranged in the first oil separator 122 and the compressor 121, the oil discharge device 125 is further provided to solve the above-mentioned problems, but it is necessary to manually confirm that the above-mentioned problems still exist when no one is aware of them, and when the refrigerant recovery machine 1 is repeatedly operated, the refrigerant oil is contaminated in the circulation of the refrigerant recovery machine 1, and when the refrigerant oil returns to the compressor 121, the inner surface of the window 124 is contaminated, so that the height of the refrigerant oil inside cannot be seen clearly, the stain of the window 124 cannot be wiped clean by the outside, so that the above-mentioned problems cannot be solved, and the compressor 121 cannot be damaged due to the fact that the refrigerant oil is too much.
Disclosure of Invention
The inventor of the present invention has sensed many disadvantages occurring in the actual operation of the refrigerant recovery device, and has conceived the research on the refrigerant recovery device for many years, and finally developed a method for preventing the compressor of the refrigerant recovery device from malfunctioning and a structure thereof according to the present invention.
In order to achieve the above object, the present invention adopts a technical solution of a method for preventing a compressor of a refrigerant recovery device from malfunctioning, wherein a compressor of the refrigerant recovery device is a high-pressure side, and the method comprises:
a. the compressor of the refrigerant recovery equipment is provided with an oil discharge channel at the safety height of the refrigeration oil, and the oil discharge channel is provided with an automatic oil discharge valve;
b. when the operation of the refrigerant recovery equipment is finished and the operation is stopped, namely the compressor stops, the automatic oil discharge valve is electrically connected and opened, and as a pressure is generated inside the compressor after the operation of the compressor stops, the refrigerant oil higher than the oil discharge channel is discharged from the automatic oil discharge valve through the oil discharge channel by the aid of the pressure;
c. when the refrigerant recovery equipment is started again, the automatic oil drain valve is closed.
Furthermore, when the compressor stops operating, the automatic oil drain valve is electrically connected with a timer, and the opening time of the automatic oil drain valve is set by the timer, so that the automatic oil drain valve is closed after being opened for draining oil for a period of time, and the automatic oil drain valve is not required to be closed again when the refrigerant recovery equipment is restarted.
Furthermore, the frozen oil discharged by the automatic oil discharge valve can be discharged into an oil separator.
A structure for preventing a compressor of a refrigerant recovery device from faults, in particular to an improvement of one part of the original structure of the refrigerant recovery device, wherein one compressor of the refrigerant recovery device is a high-pressure end, and an oil discharge channel is arranged at the safety height of refrigeration oil of the compressor of the refrigerant recovery device; and
and the automatic oil drain valve is connected with the oil drain channel.
Furthermore, a timer electrically connected to the automatic oil drain valve is further included.
Furthermore, one end of the automatic oil drain valve, which is far away from the oil drain channel, is connected with a compressor unloading pipeline, the other end of the compressor unloading pipeline is connected with an oil separator, and the oil separator is provided with an oil drain valve.
A method for preventing a compressor of a refrigerant recovery device from failure, the compressor of the refrigerant recovery device being a low-pressure end, includes:
a. the compressor of the refrigerant recovery equipment is provided with an oil discharge channel at the safety height of the refrigeration oil, and the oil discharge channel is connected with an oil separator;
b. when the operation of the refrigerant recovery equipment is finished and the operation is stopped, namely the compressor stops, an automatic valve connected with the compressor is electrically connected and opened, pressure of the refrigerant recovery equipment enters the compressor from a compressor unloading pipeline by virtue of the opening of the automatic valve, and the refrigeration oil higher than the oil discharge channel is discharged to the oil separator by virtue of the pressure through the oil discharge channel;
c. when the refrigerant recovery equipment is started again, the automatic valve is closed.
The utility model provides a structure of refrigerant recovery plant's compressor malfunction prevention, indicates especially in refrigerant recovery plant original structure, the improvement of one of them part, refrigerant recovery plant's compressor is the low pressure end, one of them compressor of refrigerant recovery plant, the compressor sets up an oil discharge passageway in refrigeration oil safety height department, oil discharge passageway connects an oil separator, an automatic valve is connected to the compressor.
Furthermore, a compressor low-pressure inlet pipeline is connected with the oil discharge channel, one end, far away from the oil discharge channel, of the compressor low-pressure inlet pipeline is connected with the oil separator, the oil separator comprises an oil discharge valve, a compressor high-pressure outlet pipeline connected with the compressor and a compressor unloading pipeline connected with the outer end of the compressor, and two ends of the automatic valve are respectively connected between the compressor high-pressure outlet pipeline and the compressor unloading pipeline.
By means of the innovative unique design, compared with the prior art, the invention can approximately achieve the following effects:
1. the damage to the compressor caused by excessive internal refrigerating oil quantity of the compressor generated in the refrigerant recovery process can be effectively avoided.
2. The redundant refrigeration oil is discharged only through the automatic oil discharge valve and the oil discharge channel of the compressor, no additional operation is needed, and the compressor is automatically protected.
3. The redundant refrigeration oil is discharged only through the automatic valve and the oil discharge channel of the compressor, no additional operation is needed, and the compressor is automatically protected.
4. The shell of the compressor can be provided with a high-pressure end or a low-pressure end, and the oil level of the freezing oil in the compressor can be protected within a safe range.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic view of a refrigerant recycling machine in the prior art.
Fig. 2 is a schematic view of another refrigerant recycling machine in the prior art.
FIG. 3 is a flow chart of the steps performed by the compressor at the high pressure end of the present invention.
FIG. 4 is a flow chart illustrating the steps performed by the compressor at the low pressure end of the present invention.
FIG. 5 is a schematic diagram of a refrigerant recovery process with a high-pressure side compressor according to the present invention.
FIG. 6 is a schematic diagram of a high-pressure side implementation of the compressor of the present invention.
FIG. 7 is a schematic view of another embodiment of the high-pressure side of the compressor of the present invention.
FIG. 8 is a schematic diagram of a refrigerant recovery process with a low-pressure side compressor according to the present invention.
FIG. 9 is a schematic view of the low-pressure side flow of the compressor of the present invention.
Wherein the reference numerals
(Prior Art)
1. Refrigerant recovery machine 11. connecting pipeline
111. High pressure line 112, low pressure line
12. Compressor 121. compressor
122. First oil separator 123. second oil separator
124. Viewing window 125 oil unloading device
13. Storage 14, external storage
(present invention)
2. Refrigerant recovery equipment 3. compressor
31. Compressor 32, compressor low pressure inlet line
33. Oil discharge channel 34 automatic valve
35. Compressor unloading line 36, compressor high pressure outlet line
37. Oil separator 38, automatic oil drain valve
39. Oil drain valve
Detailed Description
The following detailed description of the embodiments of the present invention with reference to the drawings and specific examples is provided for further understanding the objects, aspects and effects of the present invention, but not for limiting the scope of the appended claims.
Referring to fig. 3 in combination with fig. 5 and fig. 6, in an embodiment of the present invention, a method for preventing a compressor of a refrigerant recovery device from malfunctioning is shown, where a compressor 31 of the refrigerant recovery device 2 is a high-pressure end, and includes:
a. an oil discharge channel 33 is arranged at the safe height of the refrigeration oil of the compressor 31 of the refrigerant recovery device 2, and an automatic oil discharge valve 38 is arranged in the oil discharge channel 33;
b. when the operation of the refrigerant recovery device 2 is completed, i.e., the compressor 31 is stopped, the automatic oil drain valve 38 is electrically connected to be opened, and as a pressure is generated inside the compressor 31 after the operation is stopped, the refrigerant oil higher than the oil drain channel 33 is drained from the automatic oil drain valve 38 through the oil drain channel 33 by the pressure;
c. when the refrigerant recovery device 2 is started again, the automatic oil drain valve 38 is closed.
More specifically, referring to fig. 5, it is a working state of the refrigerant recovery apparatus 2 that the compressor 31 is connected to a compressor low-pressure inlet pipeline 32 and a compressor high-pressure outlet pipeline 36 respectively, and when a refrigerant is recovered, the refrigerant recovery apparatus 2 circulates to cause the accumulation of the refrigerant oil in the compressor 31, as shown in fig. 6, the compressor 31 in the compression device 3 of the refrigerant recovery apparatus 2 is set to be a high-pressure end, after the refrigerant recovery apparatus 2 is used, the compressor 31 may contain redundant refrigerant oil, which causes the poor execution effect of the compressor 31 and may cause the damage of parts, and the present invention may automatically eliminate the refrigerant oil higher than the oil discharge channel 33 in the compressor 31 by using pressure The oil discharge channel 33 is connected to the automatic oil discharge valve 38, so that the refrigerant oil is discharged from the compressor 31 through the automatic oil discharge valve 38 by means of the internal pressure of the compressor 31, after the refrigerant recovery device 2 is used, the compressor 31 stops operating and the automatic oil discharge valve 38 is automatically opened, so that the refrigerant oil is discharged from the compressor 31 by means of the oil discharge channel 33, and when the refrigerant recovery device 2 is restarted, the automatic oil discharge valve 38 is closed; in another embodiment, the automatic oil drain valve 38 is electrically connected to a timer (not shown) when the compressor 31 stops operating, and the timer (not shown) is used to set the opening time of the automatic oil drain valve 38, so that the automatic oil drain valve 38 is opened to drain oil for a period of time, and then closed without waiting for the refrigerant recovery device 2 to be restarted.
Referring to fig. 7, in another embodiment, the compressor 31 in the compression device 3 of the refrigerant recovery apparatus 2 is set to be a high-pressure end, the automatic oil drain valve 38 is connected to the oil drain passage 33, and one end of the automatic oil drain valve 38 away from the oil drain passage 33 is connected to an oil separator 37, a compressor unloading pipeline 35 is interposed between the oil drain passage 33 and the oil separator 37, the automatic oil drain valve 38 is used for controlling the direction of the compressor high-pressure outlet pipeline 36 when the compression device 3 operates, and when the refrigerant recovery apparatus 2 operates normally, the automatic oil drain valve 38 is in a closed state, so as to prevent the compressor 3 from being sent out from the oil drain passage 33 to cause a pipeline operation error; after the refrigerant recovery device 2 is used, the automatic oil drain valve 38 is opened, the refrigerant oil in the compressor 31, which is higher than the oil drain channel 33, is drained into the oil separator 37 through the compressor unloading pipeline 35 by the automatic oil drain valve 38, so that the oil level of the compressor 31 is kept at a constant height, the oil separator 37 is connected with the oil drain valve 39, after the refrigerant recovery device 2 is used, the refrigerant oil can be manually opened by the oil drain valve 39 to be drained, the oil separator 37 is large in size and can contain a large amount of refrigerant oil, so that the refrigerant oil is not immediately drained, the refrigerant oil is drained after being used for multiple times, and no problem is caused, but in practical application, a refrigerant filling worker manually opens the oil drain valve 39 to drain the refrigerant oil after each time the refrigerant recovery device 2 is used, the amount of the refrigerant oil discharged becomes a basis for filling the new refrigerant oil into the vehicle, thereby achieving the effect of maintaining the oil level of the compressor 31 at a constant level and serving as a basis for supplementing the vehicle with the new refrigerant oil.
In another embodiment, referring to fig. 8, which shows a usage state of the compressor 31 of the refrigerant recovery device 2 at a low pressure end, when a refrigerant is recovered, the circulation may cause the refrigerant oil to accumulate in the compressor 31, and referring to fig. 4, the method for preventing the compressor of the refrigerant recovery device from malfunctioning shown in this embodiment, where one compressor 31 of the refrigerant recovery device 2 at the low pressure end includes:
a. providing an oil discharge channel 33 at a safe refrigerant oil level of the compressor 31 of the refrigerant recovery device 2, wherein the oil discharge channel 33 is connected with an oil separator 37;
b. when the refrigerant recovery device 2 finishes the operation stop, that is, the compressor 31 stops the operation, an automatic valve 34 connected to the compressor 31 is electrically connected to open, a pressure of the refrigerant recovery device 2 enters the compressor 31 from a compressor unloading pipeline 35 by opening the automatic valve 34, and the refrigerant oil higher than the oil discharge channel 33 is discharged to the oil separator 37 through the oil discharge channel 33 by the pressure;
c. when the refrigerant recovery device 2 is restarted, the automatic valve 34 is closed.
More specifically, referring to fig. 9, the compressor 31 in the compression device 3 of the refrigerant recovery device 2 is set to be a low-pressure end, and after the use of the refrigerant recovery device 2 is finished, an automatic valve 34 is opened to send the pressure of the compressor high-pressure outlet pipeline 36 to the compressor 31 through a compressor unloading pipeline 35, so that the refrigerant oil higher than the oil discharge channel 33 is automatically discharged into the oil separator 37 through a compressor low-pressure inlet pipeline 32 by the pressure, the oil separator 37 is connected to the oil discharge valve 39, and after the use of the refrigerant recovery device 2 is finished, the refrigerant oil can be manually opened by the oil discharge valve 39 to be discharged, and the volume of the oil separator 37 is large, in practical application, after the refrigerant recovery device 2 is finished each time, a master filling refrigerant manually opens the oil discharge valve 39 to discharge the refrigerant, and the refrigerant is discharged by the aid of the amount of the discharged refrigerant, so that the effect of filling new refrigerant into the automobile is achieved, the oil level of the compressor 31 is kept at a constant height, and the oil level can be used as a basis for supplementing new refrigerant to the automobile.
In summary, the present invention provides the compressor 31 of the refrigerant recovery apparatus 2 with the oil discharge channel 33 at the refrigerant oil safety height, so that the refrigerant oil can be discharged from the compressor 31 to maintain the oil level of the compressor 31 at a constant height.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A method for preventing a compressor of a refrigerant recovery device from failure is characterized in that the compressor of the refrigerant recovery device is a high-pressure end and comprises the following steps:
a. the compressor of the refrigerant recovery equipment is provided with an oil discharge channel at the safety height of the refrigeration oil, and the oil discharge channel is provided with an automatic oil discharge valve;
b. when the operation of the refrigerant recovery equipment is finished and the operation is stopped, namely the compressor stops, the automatic oil discharge valve is electrically connected and opened, and as a pressure is generated inside the compressor after the operation of the compressor stops, the refrigerant oil higher than the oil discharge channel is discharged from the automatic oil discharge valve through the oil discharge channel by the aid of the pressure and is discharged into an oil separator connected with the automatic oil discharge valve;
c. when the refrigerant recovery equipment is started again, the automatic oil drain valve is closed.
2. The method as claimed in claim 1, wherein the automatic oil discharge valve is electrically connected to a timer when the compressor is stopped, and the timer is used to set the opening time of the automatic oil discharge valve, so that the automatic oil discharge valve is closed after opening oil discharge for a period of time without waiting for restarting the refrigerant recovery device.
3. The structure for preventing the compressor of the refrigerant recovery equipment from faults is characterized in that the compressor of the refrigerant recovery equipment is a high-pressure end, and an oil discharge channel is arranged at the safety height of refrigeration oil of the compressor of the refrigerant recovery equipment; and
and one end of the automatic oil drain valve, which is far away from the oil drain channel, is connected with a compressor unloading pipeline, wherein the other end of the compressor unloading pipeline is connected with an oil separator.
4. The refrigerant recovery apparatus as claimed in claim 3, further comprising a timer electrically connected to the automatic oil discharge valve.
5. The refrigerant recovery apparatus compressor failure prevention structure as recited in claim 3, wherein the oil separator is provided with an oil drain valve.
6. A method for preventing a compressor of a refrigerant recovery device from failure is characterized in that the compressor of the refrigerant recovery device is a low-pressure end and comprises the following steps:
a. the compressor of the refrigerant recovery equipment is provided with an oil discharge channel at the safety height of the refrigeration oil, and the oil discharge channel is connected with an oil separator;
b. when the refrigerant recovery equipment finishes the operation stop, namely the compressor stops the operation, an automatic valve connected between a compressor high-pressure outlet pipeline and a compressor unloading pipeline of the compressor is electrically connected and opened, the pressure of the compressor high-pressure outlet pipeline is sent to the compressor through a compressor unloading pipeline by means of the opening of the automatic valve, and the refrigeration oil higher than the oil discharge channel is discharged to the oil separator through the oil discharge channel by means of the pressure;
c. when the refrigerant recovery equipment is started again, the automatic valve is closed.
7. The structure is characterized in that a compressor of the refrigerant recovery equipment is a low-pressure end, wherein the compressor of the refrigerant recovery equipment is provided with an oil discharge channel at a safety height of refrigeration oil, the compressor is provided with a compressor low-pressure inlet pipeline connected with the oil discharge channel, a compressor high-pressure outlet pipeline connected with the compressor and a compressor unloading pipeline connected with the outer end of the compressor, the oil discharge channel is connected with an oil separator, and an automatic valve is connected between the compressor high-pressure outlet pipeline and the compressor unloading pipeline.
8. The refrigerant recycling apparatus as claimed in claim 7, wherein the oil separator includes an oil discharge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510717104.9A CN106642849B (en) | 2015-10-29 | 2015-10-29 | Method and structure for preventing compressor of refrigerant recovery equipment from failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510717104.9A CN106642849B (en) | 2015-10-29 | 2015-10-29 | Method and structure for preventing compressor of refrigerant recovery equipment from failure |
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| Publication Number | Publication Date |
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| CN106642849A CN106642849A (en) | 2017-05-10 |
| CN106642849B true CN106642849B (en) | 2020-06-09 |
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| CN201510717104.9A Active CN106642849B (en) | 2015-10-29 | 2015-10-29 | Method and structure for preventing compressor of refrigerant recovery equipment from failure |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05164415A (en) * | 1991-12-17 | 1993-06-29 | Toshiba Corp | Air conditioner |
| JP3133622B2 (en) * | 1994-09-30 | 2001-02-13 | 三洋電機株式会社 | Refrigerant recovery device |
| ES2231937T3 (en) * | 1998-02-23 | 2005-05-16 | Mitsubishi Denki Kabushiki Kaisha | AIR CONDITIONER. |
| GB2408791B (en) * | 2003-11-21 | 2009-01-28 | Arctic Circle Ltd | An oil separator for use in separating oil from refrigerant in a refrigeration system |
| KR100775821B1 (en) * | 2004-12-15 | 2007-11-13 | 엘지전자 주식회사 | Air conditioner and Control method of the same |
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