Heat pump system

Abstract

The embodiment of the utility model provides a heat pump system. The heat pump system comprises an evaporator, a compressor, a condenser, a first throttling element and a heat exchanger. The compressor, a hot side channel of the condenser, the first throttling element and a cold side channel of the evaporator are connected through a refrigerant pipeline to form a refrigerant circulation loop. A hot side inlet and a hot side outlet of the evaporator are provided with a first heat absorption connector and a second heat absorption connector respectively, and heat source equipment can be connected with the first heat absorption connector and the second heat absorption connector through a first medium pipeline to form a first medium circulation loop. A cold side inlet and a cold side outlet of the condenser are respectively provided with a first heat supply interface and a second heat supply interface; the heat utilization equipment can be connected with the first heat supply interface and the second heat supply interface through a second medium pipeline to form a second medium circulation loop; and a hot side inlet and a hot side outlet of the heat exchanger are respectively connected with a lubricating medium outlet and a lubricating medium inlet of the compressor through lubricating medium pipelines to form a lubricating medium circulation loop.

Description

Technical Field

[0001] Example embodiments of the present application generally relate to the field of heat pumps, and more particularly to a heat pump system. Background Art

[0002] The heat pump system can force heat to flow from a low-temperature object to a high-temperature object in a reverse cycle, thereby converting low-quality heat energy into high-quality heat energy to achieve efficient use of heat energy. The heat pump system usually only consumes less reverse cycle power to provide a larger heating power. However, the performance of conventional heat pump systems in terms of energy efficiency ratio and heating temperature still needs to be improved. Summary of the invention

[0003] The purpose of the present application is to provide a heat pump system to solve or at least partially solve the above-mentioned problems and / or other potential problems existing in traditional heat pump systems.

[0004] In a first aspect of the present application, a heat pump system is provided. The heat pump system is used to be connected to a heat source device and a heat-using device respectively, and includes an evaporator, a compressor, a condenser, a first throttling element, and a heat exchanger;

[0005] The compressor, the hot side channel of the condenser, the first throttling element and the cold side channel of the evaporator are connected through a refrigerant pipeline to form a refrigerant circulation loop;

[0006] The hot side inlet and the hot side outlet of the evaporator are respectively provided with a first heat absorption interface and a second heat absorption interface, the heat source device can be connected with the first heat absorption interface and the second heat absorption interface through a first medium pipeline to form a first medium circulation loop, and the evaporator is used to absorb heat energy from the first medium in the first medium circulation loop by using the refrigerant;

[0007] The cold side inlet and the cold side outlet of the condenser are respectively provided with a first heating interface and a second heating interface, and the heat-using equipment can be connected to the first heating interface and the second heating interface through a second medium pipeline to form a second medium circulation loop, and the condenser is used to heat the second medium in the second medium circulation loop with the refrigerant;

[0008] The hot side inlet and hot side outlet of the heat exchanger are respectively connected to the lubricating medium outlet and lubricating medium inlet of the compressor through lubricating medium pipelines to form a lubricating medium circulation loop. The heat exchanger is constructed to cool the lubricating medium using the first medium or the second medium.

[0009] In some embodiments, the cold side inlet and the cold side outlet of the heat exchanger are connected between the medium outlet of the heat source device and the second heat absorption interface of the evaporator through a first medium pipeline, and the evaporator is a dry evaporator.

[0010] In some embodiments, the medium outlet of the heat source device is connected to the first heat absorption interface through a first flow guide device, the cold side inlet of the heat exchanger is connected to the outlet of the first flow guide device, and the cold side outlet of the heat exchanger is connected to the inlet of the first flow guide device.

[0011] In some embodiments, the cold side inlet of the heat exchanger is connected to the medium outlet of the heat-consuming device, and the cold side inlet of the heat exchanger is connected to the medium inlet of the heat-consuming device.

[0012] In some embodiments, the cold side inlet and the cold side outlet of the heat exchanger are connected between the medium outlet of the heat-consuming device and the first heating interface of the condenser through a second medium pipeline.

[0013] In some embodiments, the medium outlet of the heat-using equipment is connected to the first heat supply interface of the condenser through a second flow guide device, the cold side inlet of the heat exchanger is connected to the outlet of the second flow guide device, and the cold side outlet of the heat exchanger is connected to the inlet of the second flow guide device.

[0014] In some embodiments, an economizer and a second throttling element are also included, wherein the cold side inlet of the economizer is connected to the hot side outlet of the condenser through the second throttling element, the cold side inlet of the economizer is connected to the air supply port of the compressor, the hot side inlet of the economizer is connected to the hot side outlet of the condenser, and the hot side outlet of the economizer is connected to the inlet of the first throttling element.

[0015] In some embodiments, a subcooler is also included, wherein the hot side inlet of the subcooler is connected to the hot side outlet of the condenser, the hot side outlet of the subcooler is connected to the inlet of the first throttling element, and the cold side inlet and cold side outlet of the subcooler are both connected between the medium outlet of the heat-using equipment and the first heat absorption interface of the evaporator.

[0016] In some embodiments, the medium outlet of the heat-using equipment is connected to the first heat absorption interface of the evaporator through a first flow guide device, the cold side inlet of the subcooler is connected to the outlet of the first flow guide device, and the cold side outlet of the subcooler is connected to the inlet of the first flow guide device.

[0017] In some embodiments, the compressor is a screw compressor.

[0018] The heat pump system of the embodiment of the present application uses the first medium or the second medium to cool the lubricating medium of the compressor, which can reduce the temperature of the lubricating medium and maintain the working efficiency and stability of the compressor. After the first medium absorbs the heat energy, it can transfer the heat energy back to the refrigerant circulation loop through the evaporator, and after the second medium absorbs the heat energy, it can provide heat for the heat-using equipment. In this way, the utilization rate of heat energy can be improved, which is conducive to improving the energy efficiency ratio and heating temperature of the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features, advantages and aspects of the embodiments of the present application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0020] Figure 1 A schematic diagram of a heat pump system according to a first embodiment of the present application is shown;

[0021] Figure 2 shows a schematic diagram of a heat pump system according to a second embodiment of the present application;

[0022] Figure 3 shows a schematic diagram of a heat pump system according to a third embodiment of the present application;

[0023] Figure 4 A schematic diagram showing a heat pump system according to a fourth embodiment of the present application; and

[0024] Figure 5 A schematic diagram of a thermal energy system according to a fifth embodiment of the present application is shown.

[0025] Description of reference numerals:

[0026] 11- compressor; 12- condenser; 13- first throttling element; 14- evaporator; 15- heat exchanger; 16- heat source equipment; 17- heat using equipment; 18- first flow guide device; 19- second flow guide device; 20- economizer; 21- second throttling element; 22- subcooler; 23- third flow guide device; 24- drying filter; 25- stop valve; 26, 27, 28- solenoid valves. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0028] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0029] An embodiment of the present application provides a heat pump system, which is used to be connected to a heat source device and a heat-using device respectively. Figure 1 FIG. 2 shows a schematic diagram of a heat pump system according to a first embodiment of the present application. Figure 1 As shown, the heat pump system according to the embodiment of the present application includes an evaporator 14 , a compressor 11 , a condenser 12 , a first throttling element 13 and a first heat exchanger 15 .

[0030] The compressor 11, the hot side channel of the condenser 12, the first throttling element 13 and the cold side channel of the evaporator 14 are connected through a refrigerant pipeline to form a refrigerant circulation loop. The hot side inlet and the hot side outlet of the evaporator are respectively provided with a first heat absorption interface and a second heat absorption interface. The heat source device 16 is connected with the first heat absorption interface and the second heat absorption interface through a first medium pipeline to form a first medium circulation loop, and the evaporator 14 is used to absorb heat energy from the first mass in the first medium circulation loop using the refrigerant. The hot side inlet and the cold side outlet of the condenser are respectively provided with a first heating interface and a second heating interface. The heat-using device 17 is connected with the first heating interface and the second heating interface through a second medium pipeline to form a second medium circulation loop, and the condenser 12 is used to heat the second medium using the refrigerant.

[0031] Specifically, the compressor 11 may have a refrigerant inlet, a refrigerant outlet, an air supply port, a lubricating medium inlet, and a lubricating medium outlet. The refrigerant outlet of the compressor 11 may be connected to the hot side inlet of the condenser 12 through a refrigerant pipeline, the hot side outlet of the condenser 12 may be connected to the inlet of the first throttling element 13 through a refrigerant pipeline, the outlet of the first throttling element 13 may be connected to the cold side inlet of the evaporator 14 through a refrigerant pipeline, and the cold side outlet of the evaporator 14 may be connected to the refrigerant inlet of the compressor 11 through a refrigerant pipeline, forming a refrigerant circulation loop.

[0032] The heat source device 16 can use the first medium circulation loop to transport the first medium to the hot side channel of the evaporator 14. In the evaporator 14, the low-temperature and low-pressure liquid refrigerant can absorb heat energy from the first medium and itself is converted into other refrigerants of low pressure, medium and low temperature. The compressor 11 is used to compress the low-pressure, medium and low-temperature gaseous refrigerant output by the evaporator 14 into a high-temperature and high-pressure gaseous refrigerant. In the condenser 12, the high-temperature and high-pressure gaseous refrigerant is used to heat the second medium, and the second medium provides heat energy to the heat-using device 17. The high-temperature and high-pressure gaseous refrigerant is also converted into a medium-temperature and high-pressure liquid refrigerant. The first throttling element 13 throttles and cools the medium-temperature and high-pressure liquid refrigerant to form a low-temperature and low-pressure liquid refrigerant that enters the cold side channel of the evaporator 14, completing the circulation of the refrigerant.

[0033] Alternatively or additionally, the compressor 11 may include, for example, a screw compressor 11. Of course, the compressor 11 is not limited to an oil-lubricated, water-lubricated or dry screw compressor 11, and the compressor 11 may include various known or unknown screw compressors 11.

[0034] Alternatively or additionally, the heat source device 16 here may include various industrial equipment that can generate heat, such as a compressor 11, an ORC steam turbine, an energy storage device, a chiller, etc. The heat-using device 17 here may include various industrial equipment that needs to use heat energy to work or provide services, etc. For example, an industrial boiler, a hot water pipe network, etc. It can be understood that the above-mentioned heat-using device 17 and heat source device 16 are only exemplary, and it should not be understood that the heat-using device 17 and the heat source device 16 are limited to the devices shown above.

[0035] Alternatively or additionally, a first flow guide device 18 may be provided on the first medium circulation loop, and the first flow guide device 18 may be used to provide power for the first medium to flow in the first medium circulation loop. For example, the first flow guide device 18 may be connected between the medium outlet of the heat source device 16 and the first heat absorption interface of the evaporator 14. Of course, the first flow guide device 18 may also be provided between the medium inlet of the heat source device 16 and the second heat absorption interface of the evaporator 14, or may also be provided at other positions of the first medium circulation loop, as long as it can provide power for the circulation flow of the first medium. Alternatively or additionally, the evaporator 14 may be a dry evaporator.

[0036] Alternatively or additionally, a second flow guide device 19 may be provided on the second medium circulation loop, and the second flow guide device 19 may be used to provide power for the second medium to flow in the second medium circulation loop. For example, the second flow guide device 19 may be connected between the medium outlet of the heat-using device 17 and the first heat supply interface of the condenser 12. Currently, the second flow guide device 19 may also be connected between the medium inlet of the heat-using device 17 and the second heat supply interface of the condenser 12, or may be provided at other positions of the second medium circulation loop, as long as it can provide power for the circulation of the second medium.

[0037] The first medium and the second medium may be various suitable gaseous or liquid heat-conducting media according to actual needs. For example, both the first medium and the second medium may be water. Or the first medium may be heat-conducting oil, and the second medium may be water, etc. The first flow-guiding device 18 here may include various devices capable of guiding the flow of the first medium, such as a pump capable of guiding the flow of water or heat-conducting oil. Similarly, the second flow-guiding device 19 may also include various devices capable of guiding the flow of the second medium.

[0038] The hot side inlet of the heat exchanger 15 is connected to the lubricating medium outlet of the compressor 11 through the lubricating medium pipeline, and the hot side outlet of the heat exchanger 15 is connected to the lubricating medium inlet of the compressor 11 through the lubricating medium pipeline to form a lubricating medium circulation loop. The heat exchanger 15 is configured to cool the lubricating medium using the first medium or the second medium. Specifically, the hot side channel of the heat exchanger 15 can be connected to the first medium pipeline to receive the first medium from the first medium pipeline, use the first medium to cool the lubricating medium, and then transport the cooled lubricating medium back to the compressor 11. Or the hot side channel of the heat exchanger 15 can be connected to the second medium pipeline, receive the second medium from the second medium pipeline, use the second medium to cool the lubricating medium, and then transport the cooled lubricating medium back to the compressor 11 to achieve the purpose of cooling the lubricating medium.

[0039] The heat pump system of the embodiment of the present application uses the first medium or the second medium to cool the lubricating medium of the compressor 11, which can reduce the temperature of the lubricating medium and maintain the working efficiency and stability of the compressor 11. After the first medium absorbs the heat energy, it can transfer the heat energy back to the refrigerant circulation loop through the evaporator 14, and after the second medium absorbs the heat energy, it can provide heat for the heat-using device 17. In this way, the utilization rate of heat energy can be improved, which is conducive to improving the energy efficiency ratio and heating temperature of the heat pump system.

[0040] It should be understood that the heat pump system of the embodiment of the present application does not include the heat-using equipment 17 and the heat source equipment 16, and the first guide device 18 and the second guide device 19 may be included in the heat pump system of the embodiment of the present application, or may not be included in the heat pump system of the embodiment of the present application.

[0041] The following combination Figures 2 to 5 The specific structure of the heat pump system according to the embodiment of the present application is exemplified.

[0042] like Figure 2 As shown, Figure 2 A schematic diagram of a heat pump system according to a second embodiment of the present application is shown. Figure 2 The second embodiment shown is relative to Figure 1The difference of the first embodiment shown mainly lies in that the cold side inlet of the heat exchanger 15 is connected to the outlet of the first flow guide device 18 through the first medium pipeline, and the cold side outlet of the heat exchanger 15 is connected to the inlet of the first flow guide device 18 through the first medium pipeline. In this way, a part of the first medium output by the first flow guide device 18 is transported to the hot side channel of the evaporator 14, and another part of the first medium is transported to the cold side channel of the heat exchanger 15. In the heat exchanger 15, the other part of the first medium cools down the lubricating medium. After that, the other part of the first medium flows back to the inlet of the first flow guide device 18, merges with another part of the first medium provided by the heat source device 16, and flows into the first flow guide device 18. The first flow guide device 18 can not only provide power for the first medium to circulate back and forth in the first medium, but also provide power for the first medium to flow through the cold side channel of the heat exchanger 15, which is conducive to simplifying the system structure and thus helping to reduce production costs. Moreover, the heat energy absorbed from the lubricating medium can be transferred to the refrigerant circulation circuit through the evaporator 14, so that this part of the heat energy can be utilized, which is beneficial to improving the heat energy utilization rate and the heating temperature.

[0043] It should be noted that the above-mentioned connection method between the heat exchanger 15 and the first medium pipeline is only exemplary, and should not be understood as the heat exchanger 15 being limited to being connected to the first medium pipeline through the above-mentioned connection method. For example, the cold side inlet of the heat exchanger 15 can also be connected to the medium outlet of the heat source device 16, and the cold side outlet of the heat exchanger 15 can also be connected to the first heat absorption interface of the evaporator 14. For another example, the cold side inlet of the heat exchanger 15 can also be connected to the second heat absorption interface of the evaporator 14, and the cold side outlet of the heat exchanger 15 can also be connected to the first heat absorption interface of the evaporator 14, and so on, which are not listed here one by one. In practical application, as long as the purpose of cooling the lubricating medium by using the first medium can be achieved.

[0044] like Figure 3 As shown, Figure 3 A schematic diagram of a heat pump system according to a third embodiment of the present application is shown. Figure 3 The third embodiment shown is relative to Figure 1The difference of the first embodiment shown mainly lies in that the cold side inlet of the heat exchanger 15 is connected to the medium outlet of the heat-using device 17 through the second medium pipeline, and the cold side outlet of the heat exchanger 15 is connected to the medium inlet of the heat-using device 17 through the second pipeline. In this way, the second medium with a relatively low temperature output by the heat-using device 17 flows into the cold side channel of the heat exchanger 15. In the heat exchanger 15, the second medium exchanges heat with the lubricating medium, and while cooling the lubricating medium, the second medium itself is also heated by the lubricating medium. The heated second medium flows back to the heat-using device 17, or flows into the heat-using device 17 after merging with the second medium heated by the condenser 12, directly providing heat energy for the heat-using device 17. In this way, the heat energy transfer process can be simplified, which is conducive to improving the heat energy transfer efficiency, and then to improving the energy utilization rate.

[0045] like Figure 4 As shown, Figure 4 A schematic diagram of a heat pump system according to a fourth embodiment of the present application is shown. Figure 4 The fourth embodiment shown is relative to Figure 1 The difference of the first embodiment shown mainly lies in that the cold side inlet of the heat exchanger 15 is connected to the outlet of the second flow guide device 19, and the cold side outlet of the heat exchanger 15 is connected to the inlet of the second flow guide device 19. In this way, of the second medium flowing out of the second flow guide device 19, a part of the second medium is provided to the cold side channel of the condenser 12, and the other part of the second medium is transported to the cold side channel of the heat exchanger 15. In the heat exchanger 15, the other part of the second medium exchanges heat with the lubricating medium, cools the lubricating medium, and absorbs heat energy from the lubricating medium. Afterwards, the other part of the second medium merges with another part of the second medium provided by the heat-using device 17 and flows into the third one. The second flow guide device 19 can not only provide power for the flow of the second medium in the second medium circulation loop, but also provide power for the second medium in the cold side channel of the heat exchanger 15, which is conducive to simplifying the system structure and thus helping to reduce production costs. Moreover, the second medium heated by the lubricating medium is transported to the condenser 12 after merging with other heat exchange media. After being heated in the condenser 12, it flows back to the heat-using equipment 17, which not only simplifies the heat energy transfer process, but also helps to maintain the stability of the heating temperature.

[0046] like Figure 5 As shown, Figure 5 A schematic diagram of a heat pump system according to a fifth embodiment of the present application is shown. Figure 5 The examples shown are similar to Figure 3 The examples shown are similar, but Figure 5 The examples shown are similar to Figure 3The first area of ​​the example shown is that a drying filter 24 is added. The hot side outlet of the condenser 12 can be connected to the inlet of the drying filter 24 through, for example, a stop valve 25, and the refrigerant flowing out of the hot side outlet of the condenser 12 flows into the drying filter 24. The drying filter 24 can filter out water and impurities in the refrigerant, which is beneficial to maintaining the quality of the refrigerant, thereby helping to extend the service life of the refrigerant and reduce the cost of use. It can be understood that the stop valve 25 is not necessary. In actual application, the drying filter 24 can also be directly connected to the hot side outlet of the condenser 12.

[0047] Figure 5 The examples shown are similar to Figure 3 The second difference of the example shown is that an economizer 20 and a second throttling element 21 are additionally provided. The outlet of the filter drier 24 is connected to the cold side inlet of the economizer 20 through a refrigerant branch, and the outlet of the filter drier 24 is also connected to the hot side inlet of the economizer 20 through another refrigerant branch. Among them, a solenoid valve 26 and a second throttling element 21 are sequentially provided along the flow direction of the refrigerant on the one refrigerant branch. A solenoid valve 27 is provided on the other refrigerant branch. The cold side outlet of the economizer 20 is connected to the air supply port of the compressor 11, and the hot side outlet of the economizer 20 is connected to the inlet of the first throttling element 13.

[0048] In this way, a part of the refrigerant flowing out of the drying filter 24 flows into the cold side channel of the economizer 20 after being throttled and cooled by the second throttling element 21. The other part of the refrigerant flows into the hot side channel of the economizer 20 via the solenoid valve 27. In the economizer 20, the part of the refrigerant cools down the other part of the refrigerant, and the other part of the refrigerant after cooling down flows into the first throttling element 13. After the part of the refrigerant is heated up, it flows back to the compressor 11 through the air supply port. In actual application, the flow rate of the part of the refrigerant and the other part of the refrigerant can be adjusted so that the part of the refrigerant is converted into a gaseous refrigerant after heating up to meet the air intake demand of the compressor 11. By setting the economizer 20, not only can the heat energy in the refrigerant be recycled, but also the temperature of the refrigerant flowing into the first throttling element 13 can be reduced, thereby reducing the temperature of the refrigerant flowing into the evaporator 14, which is beneficial to improving the heat exchange efficiency of the evaporator 14, and further beneficial to improving the energy efficiency ratio of the heat pump system.

[0049] It can be understood that the filter drier 24 is not necessary, and the solenoid valves 26 and 27 are not necessary either. The hot side outlet of the condenser 12 can be connected to the cold side inlet of the economizer 20 through the second throttling element 21, and the hot side outlet of the condenser 12 can also be directly connected to the hot side inlet of the economizer 20 through the other refrigerant branch. Conversely, relative to the filter drier 24, the economizer 20 is not necessary either. In the case where the economizer 20 is not provided, the outlet of the filter drier 24 can also be directly connected to the inlet of the first throttling element 13.

[0050] Figure 5 The examples shown are relative to Figure 3 The third area of ​​the example shown is that a subcooler 22 is added, and the outlet of the filter drier 24 is connected to the hot side inlet of the subcooler 22 through another refrigerant branch, and the other refrigerant branch is provided with a solenoid valve 28. Of course, in the case where the filter drier 24 is not provided, the hot side inlet of the subcooler 22 can also be connected to the hot side outlet of the condenser 12. The hot side outlet of the subcooler 22 is connected to the inlet of the first throttling element 13, and the cold side inlet and the cold side outlet of the subcooler 22 are both connected between the medium outlet of the heat-using device 17 and the first heat absorption interface of the evaporator 14.

[0051] Another part of the refrigerant flowing out of the filter drier 24 flows into the subcooler 22, where the first medium can cool down the other part of the refrigerant, and the heat energy of the other part of the refrigerant will also be absorbed by the first medium. After the other part of the refrigerant after cooling down merges with the other part of the refrigerant after cooling down flowing out of the economizer 20, it flows into the first throttling element 13. In this way, it is beneficial to further reduce the inlet temperature of the first throttling element 13, and then it is beneficial to further reduce the inlet temperature of the cold side channel of the evaporator 14, which can improve the heat exchange efficiency of the evaporator 14, and then it can improve the energy efficiency ratio and heating temperature of the heat pump system.

[0052] Continue to combine Figure 5 As shown, the cold side inlet of the subcooler 22 can be connected to the outlet of the first flow guide device 18, and the cold side outlet of the subcooler 22 can be connected to the inlet of the first flow guide device 18. In this way, the first flow guide device 18 can provide power for the flow of the first medium in the cold side channel of the subcooler 22 to a certain extent. In the case that the flow demand of the first medium in the cold side channel of the subcooler 22 can be met, a dedicated flow guide device may not be provided to drive the flow of the first medium in the cold side channel of the subcooler 22.

[0053] Of course, you can also Figure 5As shown, a third flow guide device 23 is provided between the cold side outlet of the subcooler 22 and the inlet of the first flow guide device 18, and the third flow guide device 23 is used to guide the flow of the first medium in the cold side channel of the subcooler 22. In this way, the flow rate of the first medium is increased, and the cooling capacity of the subcooler 22 is further reduced.

[0054] It should also be noted that Figure 5 One or more of the dry filter 24, economizer 20, subcooler 22, etc. in the example shown may also be applied to Figures 1 to 4 Any new combination formed in any of the examples shown should be deemed to belong to the protection scope of the present application without violating the design concept of the present application.

[0055] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A heat pump system, used to be connected to a heat source device and a heat-using device respectively, characterized in that: It includes an evaporator, a compressor, a condenser, a first throttling element and a heat exchanger; The compressor, the hot side channel of the condenser, the first throttling element and the cold side channel of the evaporator are connected through a refrigerant pipeline to form a refrigerant circulation loop; The hot side inlet and the hot side outlet of the evaporator are respectively provided with a first heat absorption interface and a second heat absorption interface, the heat source device can be connected with the first heat absorption interface and the second heat absorption interface through a first medium pipeline to form a first medium circulation loop, and the evaporator is used to absorb heat energy from the first medium in the first medium circulation loop by using the refrigerant; The cold side inlet and the cold side outlet of the condenser are respectively provided with a first heating interface and a second heating interface, the heat-using device can be connected with the first heating interface and the second heating interface through a second medium pipeline to form a second medium circulation loop, and the condenser is used to heat the second medium in the second medium circulation loop with the refrigerant; The hot side inlet and hot side outlet of the heat exchanger are respectively connected to the lubricating medium outlet and lubricating medium inlet of the compressor through lubricating medium pipelines to form a lubricating medium circulation loop. The heat exchanger is constructed to cool the lubricating medium using the first medium or the second medium.

2. The heat pump system according to claim 1, characterized in that: The cold side inlet and the cold side outlet of the heat exchanger are connected between the medium outlet of the heat source device and the second heat absorption interface of the evaporator through a first medium pipeline, and the evaporator is a dry evaporator.

3. The heat pump system according to claim 2, characterized in that: The medium outlet of the heat source device is connected to the first heat absorption interface through a first flow guide device, the cold side inlet of the heat exchanger is connected to the outlet of the first flow guide device, and the cold side outlet of the heat exchanger is connected to the inlet of the first flow guide device.

4. The heat pump system according to claim 1, characterized in that: The cold side inlet of the heat exchanger is connected to the medium outlet of the heat-using device, and the cold side inlet of the heat exchanger is connected to the medium inlet of the heat-using device.

5. The heat pump system according to claim 1, characterized in that: The cold side inlet and the cold side outlet of the heat exchanger are connected between the medium outlet of the heat-consuming device and the first heat supply interface of the condenser through a second medium pipeline.

6. The heat pump system according to claim 5, characterized in that: The medium outlet of the heat-using equipment is connected to the first heat supply interface of the condenser through a second flow guide device, the cold side inlet of the heat exchanger is connected to the outlet of the second flow guide device, and the cold side outlet of the heat exchanger is connected to the inlet of the second flow guide device.

7. The heat pump system according to claim 1, characterized in that: It also includes an economizer and a second throttling element, wherein the cold side inlet of the economizer is connected to the hot side outlet of the condenser through the second throttling element, the cold side inlet of the economizer is connected to the air supply port of the compressor, the hot side inlet of the economizer is connected to the hot side outlet of the condenser, and the hot side outlet of the economizer is connected to the inlet of the first throttling element.

8. The heat pump system according to claim 1, characterized in that: It also includes a subcooler, wherein the hot side inlet of the subcooler is connected to the hot side outlet of the condenser, the hot side outlet of the subcooler is connected to the inlet of the first throttling element, and the cold side inlet and cold side outlet of the subcooler are both connected between the medium outlet of the heat-using equipment and the first heat absorption interface of the evaporator.

9. The heat pump system according to claim 8, characterized in that: The medium outlet of the heat-using equipment is connected to the first heat absorption interface of the evaporator through a first flow guide device, the cold side inlet of the subcooler is connected to the outlet of the first flow guide device, and the cold side outlet of the subcooler is connected to the inlet of the first flow guide device.

10. The heat pump system according to claim 1, characterized in that: The compressor is a screw compressor.

Images