CN215675591U - Air conditioner heat pump system - Google Patents
Air conditioner heat pump system Download PDFInfo
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- CN215675591U CN215675591U CN202122308491.4U CN202122308491U CN215675591U CN 215675591 U CN215675591 U CN 215675591U CN 202122308491 U CN202122308491 U CN 202122308491U CN 215675591 U CN215675591 U CN 215675591U
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Abstract
The utility model discloses an air-conditioning heat pump system, which comprises a compressor, an oil separator, a condenser, an evaporator and an oil equalizer, wherein the compressor is used for discharging a refrigerant mixed with lubricating oil; the oil separator is used for separating the lubricating oil and respectively discharging the refrigerant and the lubricating oil; the condenser is used for receiving and condensing the refrigerant; the evaporator is used for evaporating the refrigerant discharged by the condenser and discharging the evaporated refrigerant; the oil equalizer is used for receiving and storing lubricating oil discharged by the oil separator and receiving refrigerant discharged by the evaporator, the oil equalizer is respectively connected with each compressor through a first connecting pipe, the first connecting pipe is provided with an oil return port and an air return port, the oil return port is immersed in the lubricating oil, the air return port is exposed in a space above the lubricating oil in the oil equalizer, and the air return port is used for allowing the refrigerant to enter each compressor. The air-conditioning heat pump system can realize oil balance among the parallel compressors and has high reliability and applicability.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to an air conditioner heat pump system.
Background
The existing schemes for realizing oil balance between parallel compressors have two types: (1) the main control device performs oil balance control on each compressor according to oil level information fed back by the monitoring device, such as adjusting the rotating speed of the compressor or opening an oil return electromagnetic valve, but the monitoring device is high in cost, and the monitoring device is easy to cause failure of the oil balance control to damage the compressor when the monitoring fails; (2) the oil balance pipe and the air balance pipe are communicated with each compressor, but the oil balance hole and the air balance hole are arranged on the compressors in a matching mode, so that the compressor is not suitable for most of the existing compressors.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an air-conditioning heat pump system which can realize oil balance among parallel compressors and has high reliability and applicability.
In order to achieve the above object, the present invention discloses an air-conditioning heat pump system, which comprises at least two compressors, an oil separator, a condenser, an evaporator and an oil equalizer, wherein the compressors are used for discharging a refrigerant mixed with lubricating oil; the oil separator is connected with each compressor and is used for separating lubricating oil in the refrigerant and respectively discharging the refrigerant and the lubricating oil; the condenser is used for receiving and condensing the refrigerant discharged by the oil separator; the evaporator is used for evaporating the refrigerant discharged by the condenser and discharging the evaporated refrigerant; the oil homogenizer is connected with the oil separator, the oil homogenizer is used for receiving and storing lubricating oil discharged by the oil separator and receiving refrigerant discharged by the evaporator, the oil homogenizer is respectively connected with the compressors through a first connecting pipe, the first connecting pipe is provided with an oil return port and an air return port, the oil return port is immersed in the lubricating oil in the oil homogenizer, the air return port is exposed in a space above the lubricating oil in the oil homogenizer, and the air return port is used for allowing the refrigerant in the oil homogenizer to enter the compressors.
The utility model realizes the oil balance between the compressors connected in parallel by arranging the oil separator and the oil equalizer, the oil separator receives the refrigerant mixed with the lubricating liquid and discharged by each compressor and separates the lubricating oil in the refrigerant, the oil equalizer receives and stores the lubricating oil, the refrigerant discharged by the oil separator enters the condenser and the evaporator in sequence for condensation and evaporation and is also received by the oil equalizer, and each compressor sucks the lubricating oil and the refrigerant in the oil equalizer back through the first connecting pipe. When the oil level of one of the compressors is higher, the oil discharge rate of the compressor is increased, and compared with the lubricating oil discharged by other compressors, the lubricating oil discharged by each compressor enters the oil equalizer, and then each compressor sucks the lubricating oil from the oil equalizer, so that the oil balance among the parallel compressors is realized, the reliability is high, and the oil balancing device is suitable for most of the compressors.
Optionally, the air-conditioning heat pump system further comprises a four-way valve, the four-way valve is connected among the oil separator, the condenser, the evaporator and the oil equalizer, refrigerant discharged from the oil separator enters the condenser through the four-way valve, and refrigerant discharged from the evaporator enters the oil equalizer through the four-way valve.
Optionally, the air-conditioning heat pump system further comprises a second connecting pipe, and the oil equalizer is connected with the four-way valve through the second connecting pipe to receive the refrigerant discharged by the evaporator.
Optionally, the air-conditioning heat pump system further includes a third connection pipe connected between the oil separator and the second connection pipe, and the lubricating oil discharged from the oil separator is discharged to the third connection pipe and collected to the second connection pipe through the third connection pipe.
Optionally, the air-conditioning heat pump system further comprises an expansion valve, the expansion valve is connected between the condenser and the evaporator, and the expansion valve is used for throttling and expanding the condensed refrigerant.
Optionally, each of the compressors is connected to the oil equalizer through the corresponding first connection pipe, and the oil return ports of the first connection pipes are disposed at the same height.
Optionally, the rate at which each of the compressors draws back lubricant from the oil equalizer is the same.
Optionally, a part of the first connecting pipe extending into the oil equalizer is a U-shaped pipe, the oil return port is arranged at the bottom of the U-shaped pipe, and the air return port is arranged at an opening end of the U-shaped pipe.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 and 2, the present invention discloses an air-conditioning heat pump system 100, which includes at least two compressors 1, an oil separator 2, a condenser, an evaporator and an oil equalizer 3, wherein the compressor 1 is used for discharging a refrigerant mixed with lubricating oil; the oil separator 2 is connected to each compressor 1, and the oil separator 2 separates the lubricating oil in the refrigerant and discharges the refrigerant and the lubricating oil, respectively; the condenser is used for receiving and condensing the refrigerant discharged by the oil separator 2; the evaporator is used for evaporating the refrigerant discharged by the condenser and discharging the evaporated refrigerant; the oil equalizer 3 is connected with the oil separator 2, the oil equalizer 3 is used for receiving and storing lubricating oil discharged by the oil separator 2 and receiving refrigerant discharged by the evaporator, the oil equalizer 3 is respectively connected with each compressor 1 through a first connecting pipe 4, the first connecting pipe 4 is provided with an oil return port 41 and an air return port 42, the oil return port 41 is immersed in the lubricating oil in the oil equalizer 3, the air return port 42 is exposed in a space above the lubricating oil in the oil equalizer 3, and the air return port 42 is used for allowing the refrigerant in the oil equalizer 3 to enter each compressor 1.
The utility model realizes the oil balance between the compressors 1 connected in parallel by arranging the oil separator 2 and the oil equalizer 3, the oil separator 2 receives the refrigerant mixed with the lubricating liquid and discharged by each compressor 1 and separates the lubricating oil therein, the oil equalizer 3 receives and stores the lubricating oil, the refrigerant discharged by the oil separator 2 enters the condenser and the evaporator in sequence for condensation and evaporation and is also received by the oil equalizer 3, and each compressor 1 sucks the lubricating oil and the refrigerant in the oil equalizer 3 back through the first connecting pipe 4. When the oil level of one of the compressors 1 is high, the oil discharge rate is increased, and compared with the lubricating oil discharged by the other compressors 1, the lubricating oil discharged by each compressor 1 enters the oil equalizer 3, and then each compressor 1 sucks the lubricating oil from the oil equalizer 3, so that the oil balance among the compressors 1 connected in parallel is realized, the reliability is high, and the oil balancing device is suitable for most of the compressors 1.
Referring to fig. 1 and 2, different compressors 1 may be connected to the same oil separator 2, or may be connected to different oil separators 2, respectively. In the embodiment shown in fig. 2, two oil separators 2 and two compressors 1 are provided, respectively, and the first oil separator 2a is connected to the first compressor 1a, and the second oil separator 2b is connected to the second compressor 1b, but not limited thereto.
Specifically, the oil separator 2 separates the lubricating oil mixed in the refrigerant and discharges the lubricating oil into the oil equalizer 3, and the compressor 1 sucks the lubricating oil in the oil equalizer 3 back through the oil return port 41 of the first connecting pipe 4, which is beneficial to accelerating the circulation of the lubricating oil, thereby avoiding the need of additionally injecting the lubricating oil.
Referring to fig. 1 and 2, the air-conditioning heat pump system 100 further includes a four-way valve 5, the four-way valve 5 is connected between the oil separator 2, the condenser, the evaporator and the oil equalizer 3, the refrigerant discharged from the oil separator 2 enters the condenser through the four-way valve 5, and the refrigerant discharged from the evaporator enters the oil equalizer 3 through the four-way valve 5.
Specifically, when the air-conditioning heat pump system 100 is in a cooling mode, the condenser is the outdoor heat exchanger 6, and the evaporator is the indoor heat exchanger 7, and when the air-conditioning heat pump system 100 is in a heating mode, the condenser is the indoor heat exchanger 7, and the evaporator is the outdoor heat exchanger 6, and the four-way valve 5 guides the gaseous refrigerant discharged from the oil separator 2 to the corresponding heat exchanger according to the mode of the air-conditioning heat pump system 100, so that the air-conditioning heat pump system 100 realizes indoor cooling or heating.
More specifically, the indoor heat exchanger 7 is a water-side heat exchanger, and the outdoor heat exchanger 6 is a fin-type heat exchanger.
Referring to fig. 1 and 2, the air-conditioning heat pump system 100 further includes a second connection pipe 8, and the oil equalizer 3 is connected to the four-way valve 5 through the second connection pipe 8 to receive the refrigerant discharged from the evaporator.
Referring to fig. 1 and 2, the air-conditioning heat pump system 100 further includes a third connection pipe 9, the third connection pipe 9 is connected between the oil separator 2 and the second connection pipe 8, and the lubricating oil discharged from the oil separator 2 is discharged to the third connection pipe 9 and collected to the second connection pipe 8 through the third connection pipe 9. However, the third connection pipe 9 may be connected between the oil separator 2 and the oil homogenizer 3, and the lubricating oil discharged from the oil separator 2 directly enters the oil homogenizer 3 through the third connection pipe 9.
Referring to fig. 1 and 2, the air-conditioning heat pump system 100 further includes an expansion valve 10, the expansion valve 10 being connected between the condenser and the evaporator, the expansion valve 10 being used to throttle and expand the condensed refrigerant.
Specifically, the expansion valve 10 is an electronic expansion valve. The condensed refrigerant is a high-temperature and high-pressure liquid refrigerant, and is throttled and expanded by the expansion valve 10 to become a low-temperature and low-pressure two-phase refrigerant.
Referring to fig. 1 and 2, each compressor 1 is connected to the oil homogenizer 3 through a corresponding first connection pipe 4, and the oil return port 41 of each first connection pipe 4 is disposed at the same height, so that each compressor 1 can synchronously suck back the lubricating oil in the oil homogenizer 3, but is not limited thereto.
Specifically, the speed of sucking back lubricating oil from the oil equalizer 3 by each compressor 1 is the same, which is beneficial to realizing the oil balance of the parallel compressors 1.
Referring to fig. 1 and 2, the part of the first connecting pipe 4 extending into the oil equalizer 3 is a U-shaped pipe, an oil return port 41 is arranged at the bottom of the U-shaped pipe, and an air return port 42 is arranged at the open end of the U-shaped pipe.
Specifically, the bottom of the U-shaped pipe is close to the bottom wall of the oil equalizer 3, which is beneficial for the compressor 1 to suck back the lubricating oil in the oil equalizer 3 through the oil return port 41. The opening of the opening end of the U-shaped pipe is a return air port 42, and the return air port 42 is far away from the bottom wall of the oil equalizer 3, so that the compressor 1 can suck the refrigerant in the oil equalizer 3 back through the return air port 42.
Referring to fig. 1 and 2, the operation of the air-conditioning heat pump system 100 for cooling or heating a room by using a refrigerant according to the present invention will be briefly described to facilitate understanding of the present invention; and should not be taken as limiting the utility model.
The compressor 1 compresses the gas refrigerant into a high-temperature and high-pressure gas refrigerant, and the oil separator 2 separates lubricating oil therein and discharges the lubricating oil to the oil equalizer 3 through the third connecting pipe 9 and the second connecting pipe 8.
When the air-conditioning heat pump system 100 is in a refrigeration mode, a high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger 6 through the four-way valve 5, and the outdoor heat exchanger 6 condenses the gaseous refrigerant; when the air-conditioning heat pump system 100 is in a heating mode, the high-temperature and high-pressure gaseous refrigerant enters the indoor heat exchanger 7 through the four-way valve 5, and the indoor heat exchanger 7 condenses the gaseous refrigerant to realize indoor heating.
The condensed refrigerant is a high-temperature and high-pressure liquid refrigerant, and is throttled and expanded by the expansion valve 10 to become a low-temperature and low-pressure two-phase refrigerant.
When the air-conditioning heat pump system 100 is in the refrigeration mode, the low-temperature and low-pressure two-phase refrigerant enters the indoor heat exchanger 7, and the indoor heat exchanger 7 evaporates the refrigerant to realize indoor refrigeration; when the air-conditioning heat pump system 100 is in the heating mode, the low-temperature and low-pressure two-phase refrigerant enters the outdoor heat exchanger 6, and the outdoor heat exchanger 6 evaporates the refrigerant.
The evaporated refrigerant is a low-temperature low-pressure gaseous refrigerant, and enters the oil equalizer 3 through the four-way valve 5 and the second connecting pipe 8, and the compressor 1 sucks back the gaseous refrigerant and the lubricating oil in the oil equalizer 3 again.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (8)
1. An air conditioning heat pump system, comprising:
at least two compressors for discharging a refrigerant mixed with a lubricating oil;
the oil separator is connected with each compressor and is used for separating lubricating oil in the refrigerant and respectively discharging the refrigerant and the lubricating oil;
the condenser is used for receiving the refrigerant discharged by the oil separator and condensing the refrigerant;
an evaporator for evaporating the refrigerant discharged from the condenser and discharging the evaporated refrigerant;
the oil homogenizer is connected with the oil separator and used for receiving and storing lubricating oil discharged by the oil separator and receiving refrigerant discharged by the evaporator, the oil homogenizer is respectively connected with the compressors through a first connecting pipe, the first connecting pipe is provided with an oil return port and an air return port, the oil return port is immersed in the lubricating oil in the oil homogenizer, the air return port is exposed in a space above the lubricating oil in the oil homogenizer, and the air return port is used for allowing the refrigerant in the oil homogenizer to enter the compressors.
2. An air conditioning heat pump system as recited in claim 1 further comprising a four-way valve connected between said oil separator, said condenser, said evaporator and said oil equalizer, refrigerant exiting said oil separator passing through said four-way valve into said condenser and refrigerant exiting said evaporator passing through said four-way valve into said oil equalizer.
3. An air conditioning heat pump system according to claim 2, further comprising a second connection pipe, wherein the oil equalizer is connected to the four-way valve through the second connection pipe to receive the refrigerant discharged from the evaporator.
4. An air conditioning heat pump system according to claim 3, further comprising a third connection pipe connected between the oil separator and the second connection pipe, the lubricating oil discharged from the oil separator being discharged to the third connection pipe and collected to the second connection pipe through the third connection pipe.
5. An air conditioning heat pump system according to claim 1, further comprising an expansion valve connected between the condenser and the evaporator, the expansion valve being for throttle-expanding the condensed refrigerant.
6. An air conditioning heat pump system according to claim 1, wherein each of the compressors is connected to the oil equalizer through the corresponding first connection pipe, and the oil return ports of the first connection pipes are disposed at the same height.
7. An air conditioning heat pump system according to claim 1, wherein the rate at which each of the compressors draws back lubricant from the oil equalizer is the same.
8. An air-conditioning heat pump system according to claim 1, characterized in that the part of the first connecting pipe extending into the oil equalizer is a U-shaped pipe, the oil return port is arranged at the bottom of the U-shaped pipe, and the air return port is arranged at the opening end of the U-shaped pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122308491.4U CN215675591U (en) | 2021-09-23 | 2021-09-23 | Air conditioner heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122308491.4U CN215675591U (en) | 2021-09-23 | 2021-09-23 | Air conditioner heat pump system |
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| Publication Number | Publication Date |
|---|---|
| CN215675591U true CN215675591U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122308491.4U Active CN215675591U (en) | 2021-09-23 | 2021-09-23 | Air conditioner heat pump system |
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| CN (1) | CN215675591U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200262A (en) * | 2022-07-04 | 2022-10-18 | 湖北泰和电气有限公司 | Balanced oil return system of two compressors |
| WO2023071196A1 (en) * | 2021-11-01 | 2023-05-04 | 广东美的暖通设备有限公司 | Air conditioning system, air conditioner outdoor unit and compressor assembly |
-
2021
- 2021-09-23 CN CN202122308491.4U patent/CN215675591U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023071196A1 (en) * | 2021-11-01 | 2023-05-04 | 广东美的暖通设备有限公司 | Air conditioning system, air conditioner outdoor unit and compressor assembly |
| CN115200262A (en) * | 2022-07-04 | 2022-10-18 | 湖北泰和电气有限公司 | Balanced oil return system of two compressors |
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