CN216244965U - Two-stage heat pump with cooling tower - Google Patents
Two-stage heat pump with cooling tower Download PDFInfo
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- CN216244965U CN216244965U CN202122460700.7U CN202122460700U CN216244965U CN 216244965 U CN216244965 U CN 216244965U CN 202122460700 U CN202122460700 U CN 202122460700U CN 216244965 U CN216244965 U CN 216244965U
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Abstract
The utility model discloses a two-stage heat pump with a cooling tower, which comprises a primary compressor, a four-way reversing valve, a primary condenser and a primary evaporator, wherein the primary compressor, the four-way reversing valve, the primary condenser and the primary evaporator form a second circulation loop; the secondary evaporator, the secondary compressor, the secondary condenser and the secondary throttle valve form a third circulation loop; and the secondary condenser, the first pipeline, the cooling tower circulating pump and the second pipeline form a fourth circulating loop. The cooling tower is arranged, so that a secondary system of the double-stage heat pump system is not idle in a refrigerating season any more, and a refrigerating cold source can be provided together with the primary system. The refrigeration guarantee capacity of the system can be effectively improved, and the utilization rate of the equipment is improved.
Description
Technical Field
The utility model relates to the field of heat pump application, in particular to a two-stage heat pump with a cooling tower.
Background
The existing two-stage heat pump system only uses the primary heat pump system in the refrigeration season, and the secondary heat pump system can not carry out refrigeration, so that the secondary heat pump system is idle in the refrigeration season. In addition, in some cases where the primary heat pump system is normally configured, the cooling capacity is insufficient, and it is necessary to further increase the configuration of the primary system.
SUMMERY OF THE UTILITY MODEL
The purpose of the embodiments of the present invention is to provide a two-stage heat pump with a cooling tower, which effectively improves the refrigeration capacity of the heat pump and the utilization rate of the equipment, in view of the above-mentioned drawbacks of the prior art.
In order to achieve the aim, the utility model adopts the technical scheme that:
a two-stage heat pump with a cooling tower comprising a primary compressor;
the outlet of the primary compressor is connected with the primary side of the primary condenser through a four-way reversing valve, the primary side of the primary condenser is connected with the primary evaporator through a primary throttle valve, and the primary evaporator is connected with the inlet of the primary compressor through the four-way reversing valve to form a first circulation loop;
the secondary side of the primary condenser is connected with the primary side of the secondary evaporator through a primary circulating pump, and the primary side of the secondary evaporator is connected with the secondary side of the primary condenser through a buffer water tank to form a second circulating loop;
the secondary side of the secondary evaporator is connected with the inlet of a secondary compressor, the outlet of the secondary compressor is connected with the primary side of a secondary condenser, and the primary side of the secondary condenser is connected with the secondary side of the secondary evaporator through a secondary throttle valve to form a third circulation loop;
the secondary side of the secondary condenser is connected with a first pipeline, the first pipeline is connected with one side of a cooling tower, the other side of the cooling tower is connected with an inlet of a cooling tower circulating pump, and an outlet of the cooling tower circulating pump is connected with the secondary side of the secondary condenser through a second pipeline to form a fourth circulating loop;
the first pipeline is connected with a third pipeline through a third refrigeration valve, the third pipeline is respectively connected with a tail end water outlet and a fourth pipeline, the fourth pipeline is connected with a pipeline of which the secondary side of the primary condenser is connected with a primary circulating pump, and the fourth pipeline is connected with the primary side of a secondary evaporator through a fourth refrigeration valve;
the second pipeline is connected with a fifth pipeline through a first valve, the fifth pipeline is connected with a tail-end circulating pump and a sixth pipeline respectively, the tail-end circulating pump is connected with a tail-end water return port, and the sixth pipeline is connected with a buffer water tank.
And a first check valve is arranged on a connecting pipeline between the primary circulating pump and the primary side of the secondary evaporator.
And a second check valve is arranged on the fourth pipeline.
The outlet of the cooling tower circulating pump is connected with a second pipeline through a first refrigeration valve; the first pipeline is connected with one side of the cooling tower through a second refrigeration valve.
And refrigerants are arranged in the first circulation loop and the third circulation loop, and water or antifreeze is arranged in the second circulation loop, the fourth circulation loop, the first pipeline, the second pipeline, the fourth pipeline and the sixth pipeline.
The refrigerant is fluorine.
And a second valve is arranged on the sixth pipeline.
The first valve and/or the second valve are electrically operated valves.
The technical scheme provided by the embodiment of the utility model has the following beneficial effects:
1) the utility model is a double-stage coupling heat pump system, which can ensure that each compressor of the system is in a good working state under all working conditions, thereby improving the running reliability of system equipment and prolonging the service life of the equipment.
2) Because the cooling tower is arranged, the secondary system of the double-stage heat pump system is not idle in the cooling season any more, and the cooling tower and the primary system can provide a cooling cold source at the same time. The refrigeration guarantee capacity of the system can be effectively improved, and the utilization rate of the equipment is improved.
Drawings
Fig. 1 is a schematic structural diagram of a dual-stage heat pump system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dual-stage heating operation mode according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a single-stage heating operation mode according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cooling operation mode according to an embodiment of the present invention.
For ease of understanding, the stopped pipe sections in the various exemplary figures are shown in dashed lines, and the dashed lines may be considered to be absent in this mode of operation.
In the figure: 1. a primary evaporator; 2. a primary throttle valve; 3. a primary compressor; 4. a four-way reversing valve; 5. a primary condenser; 6, buffering the water tank; 7. a primary circulation pump; 8. a secondary evaporator; 9. a secondary throttle valve; 10. a secondary compressor; 11. a secondary condenser; 12 a second valve; 14. a tail end circulating pump; 15. a first valve; 16. a second check valve; 17. a first refrigeration valve; 18. a cooling tower; 19. a cooling tower circulation pump; 20. a second refrigeration valve; 21. a third refrigeration valve; 22. a fourth refrigeration valve; 23. a first check valve; 24. a first conduit; 25. a second conduit; 26. a third pipeline; 27. a tail end water outlet; 28. a fourth conduit; 29. a fifth pipeline; 30. a sixth pipeline; 31. a tail end water return port;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a dual stage heat pump with a cooling tower includes a primary compressor;
the outlet of the primary compressor 3 is connected with the primary side of a primary condenser 5 through a four-way reversing valve 4, the primary side of the primary condenser 5 is connected with a primary evaporator 1 through a primary throttle valve 2, and the primary evaporator 1 is connected with the inlet of the primary compressor 3 through the four-way reversing valve 4 to form a first circulation loop;
the secondary side of the primary condenser 5 is connected with the primary side of a secondary evaporator 8 through a primary circulating pump 7, and the primary side of the secondary evaporator 8 is connected with the secondary side of the primary condenser 5 through a buffer water tank 6 to form a second circulating loop;
the secondary side of the secondary evaporator 8 is connected with the inlet of a secondary compressor 10, the outlet of the secondary compressor 10 is connected with the primary side of a secondary condenser 11, and the primary side of the secondary condenser 11 is connected with the secondary side of the secondary evaporator 8 through a secondary throttle valve 9 to form a third circulation loop;
the secondary side of the secondary condenser 11 is connected with a first pipeline 24, the first pipeline 24 is connected with one side of the cooling tower 18, the other side of the cooling tower 18 is connected with an inlet of a cooling tower circulating pump 19, an outlet of the cooling tower circulating pump 19 is connected with the secondary side of the secondary condenser 11 through a second pipeline 25, and a fourth circulating loop is formed;
the first pipeline 24 is connected with a third pipeline 26 through a third refrigerating valve 21, the third pipeline 26 is respectively connected with a tail end water outlet 27 and a fourth pipeline 28, the fourth pipeline 28 is connected with a pipeline connecting the secondary side of the primary condenser 5 with the primary circulating pump 7, and the fourth pipeline 28 is connected with the primary side of the secondary evaporator 8 through a fourth refrigerating valve 22;
the second pipeline 25 is connected with a fifth pipeline 29 through a first valve 15, the fifth pipeline 29 is respectively connected with a tail-end circulating pump 14 and a sixth pipeline 30, the tail-end circulating pump 14 is connected with a tail-end water return port 31, and the sixth pipeline 30 is connected with the buffer water tank 6.
The utility model increases the configuration of the cooling tower, so that the two-stage heat pump is not idle in heating/cooling seasons, and the cooling capacity of the heat pump and the utilization rate of equipment can be effectively improved.
Further, a first check valve 23 is provided on a connection pipe between the primary circulation pump 7 and the primary side of the secondary evaporator 8.
The first check valve is arranged in the second circulation loop, so that the short circuit of a water circuit system can be ensured under the single-stage heating working state of the system.
Further, a second check valve 16 is provided on the fourth conduit 28.
Be equipped with one-way second check valve on the second pipeline, the waterway pressure of the first pipeline can be avoided when doublestage mode operation to produce the influence to the waterway pressure in the second circulation circuit.
Preferably, the outlet of the cooling tower circulating pump 19 is connected with the second pipeline 25 through a first refrigeration valve; the first pipe 24 is connected to the cooling tower 18 side through a second refrigerant valve.
Preferably, the first circulation loop and the third circulation loop are fluorine pipelines, refrigerant fluorine is arranged in the first circulation loop and the second circulation loop, the fourth circulation loop, the first pipeline 24, the second pipeline 25, the fourth pipeline 28 and the sixth pipeline 30 are internally provided with water or antifreeze solution.
Further, a second valve 12 is disposed on the sixth pipeline 30.
For automatic control, the first valve 15 and the second valve 12 are electrically operated valves.
The utility model comprises a first circulation loop, a second circulation loop, a third circulation loop, a fourth circulation loop, a first pipeline, a second pipeline and a third pipeline;
the first pipeline comprises a tail end water return port 31, a tail end water outlet 27, a tail end circulating pump 14, a first valve 15, a secondary condenser 11, a third refrigerating valve 21 and corresponding pipelines. The tail end water return port 31 is connected with an inlet of the tail end circulating pump 14, an outlet of the tail end circulating pump 14 is connected with the secondary side of the secondary condenser 11 through the first valve 15, and the secondary side of the secondary condenser 11 is connected with the tail end water outlet 27 through the third refrigerating valve 21 to form a first pipeline.
The second pipeline comprises a tail end water return port 31, a tail end water outlet 27, a tail end circulating pump 14, a second valve 12, a buffer water tank 6, a primary condenser 5, a second check valve 16 and related pipelines. The tail end water return port 31 is connected with an inlet of a tail end circulating pump 14, the tail end circulating pump 14 is connected with the buffer water tank 6 through a second valve 12, the buffer water tank 6 is connected with the secondary side of the primary condenser 5, and the secondary side of the primary condenser 5 is connected with the tail end water outlet 27 through a second check valve 16 to form a second pipeline.
The third pipeline comprises a tail end water return port 31, a tail end water outlet 27, a tail end circulating pump 14, a second valve 12, a buffer water tank 6, a primary condenser 5, a secondary evaporator 8, a fourth refrigerating valve 22, a second check valve 16 and related pipelines. The tail end water return port 31 is connected with an inlet of the tail end circulating pump 14, the tail end circulating pump 14 is connected with the buffer water tank 6 through the second valve 12, the buffer water tank 6 to the fourth pipeline 28 are divided into a first parallel pipeline and a second parallel pipeline, the buffer water tank 6 is connected to the fourth pipeline 28 through the secondary side of the primary condenser 5 to form a first parallel pipeline, the buffer water tank 6 passes through the primary side of the secondary evaporator 8, the fourth refrigerating valve 22 is connected to the fourth pipeline 28 to form a second parallel pipeline, a collection point of the first parallel pipeline and the second parallel pipeline is connected with the tail end water outlet 27 through the second check valve 16 to form a third pipeline.
The first circulation loop and the third circulation loop are fluorine pipelines, and a refrigerant is used as a heat transfer working medium; the second circulation loop, the fourth circulation loop, the first pipeline, the second pipeline and the third pipeline are water pipelines, and water or antifreeze is used as a heat transfer working medium.
The two-stage heat pump with the cooling tower has the following operation modes:
referring to fig. 2, the dual-stage heating operation mode: in this operating mode, the first refrigeration valve 17, the second refrigeration valve 20, and the fourth refrigeration valve 22 are closed, and the third refrigeration valve 21 is opened; closing the second valve 12 and opening the first valve 15; and closing the fourth circulation loop, the second pipeline and the third pipeline, starting the primary circulation pump 7 and the tail end circulation pump 14, and starting the first circulation loop, the second circulation loop, the third circulation loop and the first pipeline. At this time, the four-way reversing valve 4 in the first circulation loop is switched to a heating working state. The primary evaporator 1 absorbs heat in air, is compressed and heated by a primary compressor 3 in the first circulation loop, and then is transmitted to the second circulation loop through a primary condenser 5. The water or antifreeze in the second circulation loop is used as a heat transfer working medium, and the absorbed heat is transferred to the secondary evaporator 8 in the third circulation loop. The third circulation loop absorbs the heat of the second circulation loop, after secondary compression and temperature rise, the heat is transferred to the first pipeline through a secondary condenser 11 in the third circulation loop and is supplied to a tail end system for heating.
Referring to fig. 3, single stage heating mode of operation: in this operating mode, the first refrigeration valve 17, the second refrigeration valve 20, and the fourth refrigeration valve 22 are closed, and the third refrigeration valve 21 is opened; opening the second valve 12 and closing the first valve 15; the second circulation loop, the third circulation loop, the fourth circulation loop, the first pipeline and the third pipeline are closed, the tail-end circulation pump 14 is started, and the first circulation loop and the second pipeline are started. At this time, the four-way reversing valve 4 in the first circulation loop is switched to a heating working state. The primary evaporator 1 absorbs heat in air, is compressed and heated by a primary compressor 3 in the first circulation loop, and then is transmitted to a second pipeline through a primary condenser 5 to be supplied to a tail end system for heating.
Referring to fig. 4, the cooling operation mode: in this operating mode, the first refrigeration valve 17, the second refrigeration valve 20, the fourth refrigeration valve 22 are opened, and the third refrigeration valve 21 is closed; opening the second valve 12 and closing the first valve 15; and closing the second circulation loop, the first pipeline and the second pipeline, starting the cooling tower circulating pump 19 and the tail end circulating pump 14, and starting the first circulation loop, the third circulation loop, the fourth circulation loop and the third pipeline. At this time, the four-way selector valve 4 in the first circulation circuit is switched to the cooling operation state. The heat of the tail end system enters a third pipeline through a tail end water return port 31 and is transferred to the first circulation loop and the third circulation loop through the primary condenser 5 and the secondary evaporator 8. The heat absorbed in the first circulation loop is compressed and heated and then is dissipated into the air through the primary evaporator 1; meanwhile, the heat absorbed in the third circulation loop is compressed by the secondary compressor 10, heated, and then transferred to the fourth circulation loop through the secondary condenser 11, and finally dissipated to the air through the cooling tower 18. The circulation is continuous, so that the refrigeration function can be realized.
The utility model can realize the functions of heating in winter and refrigerating in summer; in the heating working state in winter, the heat of the system is derived from the heat absorbed by the primary system from the air, and a single-stage heating mode that the primary system directly supplies heat or a double-stage heating mode that the primary system absorbs the heat from the air and heats up again through the secondary system can be realized automatically according to the environmental conditions.
In the refrigeration working state in summer, the function of simultaneously supplying cold for the primary heat pump and the secondary heat pump can be realized, and the system can radiate heat to the air through the primary system and can also start the secondary system to radiate heat to the air through the cooling tower. The cold supply capacity of the system and the utilization rate of the equipment can be effectively improved.
The unit has the characteristics of high efficiency, energy conservation and reliable operation, and has market popularization value.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A two-stage heat pump with a cooling tower is characterized by comprising a primary compressor;
the outlet of the primary compressor is connected with the primary side of the primary condenser through a four-way reversing valve, the primary side of the primary condenser is connected with the primary evaporator through a primary throttle valve, and the primary evaporator is connected with the inlet of the primary compressor through the four-way reversing valve to form a first circulation loop;
the secondary side of the primary condenser is connected with the primary side of the secondary evaporator through a primary circulating pump, and the primary side of the secondary evaporator is connected with the secondary side of the primary condenser through a buffer water tank to form a second circulating loop;
the secondary side of the secondary evaporator is connected with the inlet of a secondary compressor, the outlet of the secondary compressor is connected with the primary side of a secondary condenser, and the primary side of the secondary condenser is connected with the secondary side of the secondary evaporator through a secondary throttle valve to form a third circulation loop;
the secondary side of the secondary condenser is connected with a first pipeline, the first pipeline is connected with one side of a cooling tower, the other side of the cooling tower is connected with an inlet of a cooling tower circulating pump, and an outlet of the cooling tower circulating pump is connected with the secondary side of the secondary condenser through a second pipeline to form a fourth circulating loop;
the first pipeline is connected with a third pipeline through a third refrigeration valve, the third pipeline is respectively connected with a tail end water outlet and a fourth pipeline, the fourth pipeline is connected with a pipeline of which the secondary side of the primary condenser is connected with a primary circulating pump, and the fourth pipeline is connected with the primary side of a secondary evaporator through a fourth refrigeration valve;
the second pipeline is connected with a fifth pipeline through a first valve, the fifth pipeline is connected with a tail-end circulating pump and a sixth pipeline respectively, the tail-end circulating pump is connected with a tail-end water return port, and the sixth pipeline is connected with a buffer water tank.
2. The two-stage heat pump with cooling tower of claim 1, wherein the first check valve is disposed on the pipe connecting the primary circulation pump and the primary side of the secondary evaporator.
3. The dual stage heat pump with cooling tower of claim 1, wherein a second check valve is provided on said fourth conduit.
4. The dual stage heat pump with cooling tower of claim 1 wherein the outlet of the cooling tower circulating pump is connected to the second conduit through a first refrigeration valve; the first pipeline is connected with one side of the cooling tower through a second refrigeration valve.
5. The two-stage heat pump with a cooling tower according to any one of claims 1 to 4, wherein a refrigerant is provided in the first circulation circuit and the third circulation circuit, and water or an antifreeze solution is provided in the second circulation circuit, the fourth circulation circuit, the first pipe, the second pipe, the fourth pipe and the sixth pipe.
6. The two-stage heat pump with cooling tower of claim 5, wherein the refrigerant is fluorine.
7. The dual stage heat pump with cooling tower of claim 5, wherein a second valve is provided on the sixth conduit.
8. The dual stage heat pump with cooling tower of claim 7, wherein the first valve and/or the second valve is an electrically actuated valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122460700.7U CN216244965U (en) | 2021-10-13 | 2021-10-13 | Two-stage heat pump with cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122460700.7U CN216244965U (en) | 2021-10-13 | 2021-10-13 | Two-stage heat pump with cooling tower |
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| Publication Number | Publication Date |
|---|---|
| CN216244965U true CN216244965U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122460700.7U Active CN216244965U (en) | 2021-10-13 | 2021-10-13 | Two-stage heat pump with cooling tower |
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|---|---|
| CN (1) | CN216244965U (en) |
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2021
- 2021-10-13 CN CN202122460700.7U patent/CN216244965U/en active Active
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