Air source steam heat pump system and control method

Abstract

The present application provides an air source steam heat pump system, the air source steam heat pump system includes a heating module, a cooling module, and a condensing evaporator, the heating module includes a first output module, the steam generated by the heating module can be output through the first output module, the cooling module includes a second output module, the cold water generated by the cooling module can be output through the second output module, and the cooling module includes a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger are in different pipelines of the cooling module, and when the refrigerant passes through different pipelines, water of different temperatures can be generated. On the one hand, the air source steam heat pump system of the present application can produce cold water while producing steam, meeting the needs of industrial enterprises that use steam and also need process water cooling. On the other hand, the heating module and the cooling module of the present application share a condensing evaporator, which can reduce the cost of the heat pump system, thereby reducing the production cost of industrial enterprises.

Description

Technical Field

[0001] The present application belongs to the technical field of heat pump systems, and in particular, relates to an air source steam heat pump system and a control method. Background Art

[0002] Industrial enterprises require many production conditions. Some production equipment requires steam, and some production equipment's processes require water cooling, or water at different temperatures. That is, industrial enterprises use steam and also need process water cooling.

[0003] The steam heat pump in the prior art cannot meet the requirements of steam production and cooling water at the same time. The steam heat pump in the prior art needs to add a refrigeration unit separately. However, the cost of adding a refrigeration unit is high, which will increase the production cost of industrial enterprises. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide an air source steam heat pump system, which is designed to produce cold water while producing steam, so as to meet the needs of industrial enterprises that use steam and also need process water cooling.

[0005] In order to solve the above technical problems, the present application provides an air source steam heat pump system on one hand, the air source steam heat pump system includes a heating module, a cooling module, and a condenser evaporator;

[0006] The heating module comprises a first gas-liquid separator, a first compressor, a high-efficiency tank, a first liquid storage device, a first economizer, and a first electronic expansion valve which are connected in sequence;

[0007] The heating module includes a first output module, the first output module includes a flash water tank, and the flash water tank is connected to the high-efficiency tank;

[0008] The refrigeration module comprises a second liquid reservoir, a second economizer, a second electronic expansion valve, a first heat exchanger, a first four-way valve, a second gas-liquid separator, a second compressor and a second four-way valve connected in sequence;

[0009] The refrigeration module includes a second output module, the second output module includes a third expansion valve and a second heat exchanger connected in sequence, the second heat exchanger is provided with a liquid interface, the third expansion valve is connected to the second liquid reservoir, and the second heat exchanger is connected to the first four-way valve;

[0010] The first four-way valve is provided with four connecting ports, and the four connecting ports are respectively connected to the second four-way valve, the first heat exchanger, the second heat exchanger and the second gas-liquid separator;

[0011] The second four-way valve is provided with four connecting ports, and the four connecting ports are respectively connected to the second compressor, the condenser evaporator, the first four-way valve and the second gas-liquid separator;

[0012] The condenser evaporator is respectively connected to the first gas-liquid separator, the first electronic expansion valve, the second liquid reservoir and the second four-way valve, wherein the first gas-liquid separator and the first electronic expansion valve are connected through the condenser evaporator, and the second liquid reservoir and the second four-way valve are connected through the condenser evaporator.

[0013] Furthermore, the liquid interface of the second heat exchanger includes a first interface and a second interface, and the first interface and the second interface are in communication;

[0014] The air source steam heat pump system includes a defrost module, which includes a first three-way valve and a second three-way valve. The first three-way valve is connected to the first interface and the flash water tank respectively, and the second three-way valve is connected to the second interface and the flash water tank respectively.

[0015] Furthermore, the defrost module is provided with a first circulating water pump, and the first circulating water pump is arranged on a pipeline between the second heat exchanger and the second three-way valve.

[0016] Further, the first economizer is provided with a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is connected to the first liquid reservoir, the first outlet is connected to the first electronic expansion valve, and the first inlet and the first outlet are in communication;

[0017] The heating module includes a fourth electronic expansion valve, one end of the fourth electronic expansion valve is connected to the first outlet, and the other end is connected to the second inlet, the second outlet is connected to the first compressor, and the second inlet is communicated with the second outlet.

[0018] Further, the second economizer is provided with a third inlet, a fourth inlet, a third outlet and a fourth outlet, the third inlet is connected to the second liquid reservoir, the third outlet is connected to the second electronic expansion valve, and the third inlet and the third outlet are in communication;

[0019] The refrigeration module includes a fifth electronic expansion valve, one end of the fifth electronic expansion valve is connected to the third outlet, and the other end is connected to the fourth inlet, the fourth outlet is connected to the second compressor, and the fourth inlet is communicated with the fourth outlet.

[0020] Furthermore, a one-way valve is provided on the pipeline between the second liquid storage device and the condenser evaporator; and / or

[0021] The high-efficiency tank is provided with a fifth inlet, a sixth inlet, a fifth outlet and a sixth outlet, the fifth inlet is connected to the first compressor, the fifth outlet is connected to the first liquid reservoir, and the fifth inlet is communicated with the fifth outlet; the sixth inlet and the sixth outlet are respectively connected to the flash water tank, and a second circulating water pump is provided in the pipeline between the sixth inlet and the flash water tank or the sixth outlet and the flash water tank.

[0022] Furthermore, the air source steam heat pump system includes a controller, which is respectively connected to the heating module, the cooling module, and the condenser evaporator, and the controller is used to control the operation of the heating module, the cooling module, and the condenser evaporator.

[0023] On one hand, the present application provides a heat pump system control method, which is applied to any of the above-mentioned air source steam heat pump systems, and the control method includes:

[0024] Obtaining operation instructions, and controlling the heating module, the cooling module, and the condenser evaporator according to the operation instructions, so that the air source steam heat pump system outputs steam or liquids of different temperatures;

[0025] Among them, the operating instructions include at least one of a first-speed refrigeration instruction, a second-speed refrigeration instruction, and a steam production instruction, wherein the liquid temperature output by the air source steam heat pump system under the first-speed refrigeration instruction is higher than the temperature under the second-speed refrigeration instruction.

[0026] Further, the air source steam heat pump system includes a defrost module, the defrost module includes a first three-way valve and a second three-way valve, the first three-way valve is connected to the first interface and the flash water tank respectively, the second three-way valve is connected to the second interface and the flash water tank respectively, and the control method includes:

[0027] Trigger a defrost instruction, and defrost the first heat exchanger according to the defrost instruction;

[0028] The defrost instruction includes a first defrost instruction, and the first defrost instruction is used to instruct the first heat exchanger to defrost.

[0029] Furthermore, the conditions for triggering the defrost instruction include:

[0030] It is monitored that the usage time of the first heat exchanger exceeds a first preset time; or

[0031] The first heat exchanger is provided with a first frost detector for monitoring the amount of frost on the first heat exchanger. The conditions for triggering the defrost instruction include:

[0032] It is monitored that the amount of frost on the first heat exchanger exceeds a first preset value.

[0033] The present application discloses an air source steam heat pump system, which includes a heating module, a cooling module, and a condensing evaporator. The heating module includes a first output module, through which the steam generated by the heating module can be output, the cooling module includes a second output module, through which the cold water generated by the cooling module can be output, and the cooling module includes a first heat exchanger and a second heat exchanger. The first heat exchanger and the second heat exchanger are in different pipelines of the cooling module, and when the refrigerant passes through different pipelines, water of different temperatures can be generated. On the one hand, the air source steam heat pump system of the present application can produce cold water while producing steam, so as to meet the needs of industrial enterprises for process water cooling while using steam. On the other hand, the heating module and the cooling module of the present application share a condensing evaporator, which can reduce the cost of the heat pump system, thereby reducing the production cost of industrial enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the air source steam heat pump system in the embodiment of the present application;

[0035] Figure 2 is a schematic diagram of the piping when the air source steam heat pump system in the embodiment of the present application operates in the first mode;

[0036] Figure 3 It is a schematic diagram of the piping when the air source steam heat pump system in the embodiment of the present application is operated in the second mode;

[0037] Figure 4 1 is a schematic diagram of the piping when the air source steam heat pump system in the embodiment of the present application is operated in the third mode;

[0038] Figure 5 is a schematic diagram of the piping when the air source steam heat pump system in the embodiment of the present application operates in the fourth mode;

[0039] Figure 6 is a flow chart of a heat pump system control method in an embodiment of the present application;

[0040] Figure 7 It is a flow chart of defrosting in the heat pump system control method in the embodiment of the present application.

[0041] In the accompanying drawings, the reference numerals represent: 1. heating module; 11. first gas-liquid separator; 12. first compressor; 13. high-efficiency tank; 14. first liquid reservoir; 15. first economizer; 16. first electronic expansion valve; 17. first output module; 171. flash water tank; 18. fourth electronic expansion valve; 19. second circulating water pump; 2. refrigeration module; 21. second liquid reservoir; 22. second economizer; 23. second electronic expansion valve; 24. first heat exchanger; 25. first four-way valve; 26. second gas-liquid separator; 27. second compressor; 28. second four-way valve; 29. ​​second output module; 291. third expansion valve; 292. second heat exchanger; 201. fifth electronic expansion valve; 202. one-way valve; 3. condenser evaporator; 4. defrost module; 41. first three-way valve; 42. second three-way valve; 43. first circulating water pump. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] As attached Figure 1 As shown in FIG. 1 , it is a schematic diagram of the overall structure of the air source steam heat pump system in the embodiment of the present application; as shown in FIG. Figure 2-5, is a schematic diagram of the pipelines of the air source steam heat pump system in different operating modes in the embodiment of the present application. Figure 1-5 It can be seen that the air source steam heat pump system includes a heating module 1 , a cooling module 2 , and a condenser evaporator 3 .

[0046] The heating module 1 includes a first gas-liquid separator 11, a first compressor 12, a high-efficiency tank 13, a first liquid storage tank 14, a first economizer 15, and a first electronic expansion valve 16 connected in sequence. The refrigerant coming out of the condenser evaporator 3 is first separated into gas and liquid in the first gas-liquid separator 11, and the gaseous refrigerant is transported to the first compressor 12. The first compressor 12 compresses the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant enters the high-efficiency tank 13 for heat exchange and condenses into a high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is buffered in the first liquid storage tank 14 and enters the first economizer 15 for supercooling. It is then throttled into a low-temperature and low-pressure liquid refrigerant through the first electronic expansion valve 16. The low-temperature and low-pressure liquid refrigerant enters the condenser evaporator 3 and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the first gas-liquid separator 11 again for gas-liquid separation to prevent the liquid refrigerant from entering the condenser evaporator 3. The heating module circulates heat in this way to produce steam.

[0047] The heating module 1 includes a first output module 17, and the first output module 17 includes a flash water tank 171, and the flash water tank 171 is connected to the high-efficiency tank 13. The above describes the heating principle of the heating module 1. The first output module 17 is used to generate steam and transport the steam to the equipment that needs steam. From the above, it can be seen that the high-temperature and high-pressure gaseous refrigerant enters the high-efficiency tank 13 for heat exchange and condenses into a high-temperature and high-pressure liquid refrigerant. In this process, the refrigerant releases a large amount of heat. The flash water tank 171 is connected to the high-efficiency tank 13, and the flash water tank 171 and the high-efficiency tank 13 have a water circulation. The water can obtain a large amount of heat in the high-efficiency tank 13, thereby becoming high-temperature water. The high-temperature water enters the flash water tank 171 for flash evaporation to generate steam. The flash water tank 171 is connected to the equipment that needs steam and transports the steam to the equipment that needs steam.

[0048] The refrigeration module 2 includes a second liquid storage tank 21, a second economizer 22, a second electronic expansion valve 23, a first heat exchanger 24, a first four-way valve 25, a second gas-liquid separator 26, a second compressor 27 and a second four-way valve 28 which are connected in sequence. In the operation mode of a refrigeration module, the medium-temperature and high-pressure liquid refrigerant coming out of the condenser evaporator 3 is first buffered in the second liquid reservoir 21, and is supercooled by the second economizer 22, and then is throttled and reduced in pressure by the second electronic expansion valve 23. The low-temperature and low-pressure liquid refrigerant coming out of the second electronic expansion valve 23 enters the first heat exchanger 24 to evaporate and becomes a low-temperature and low-pressure gaseous refrigerant. After passing through the first four-way valve 25, it enters the second gas-liquid separator 26 for gas-liquid separation. The low-temperature and low-pressure gaseous refrigerant enters the second compressor 27. The low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant in the second compressor 27. The high-temperature and high-pressure gaseous refrigerant passes through the second four-way valve 28 and returns to the condenser evaporator 3. The high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant in the condenser evaporator 3. The medium-temperature and high-pressure liquid refrigerant returns to the second liquid reservoir 21 for buffering.

[0049] The refrigeration module 2 includes a second output module 29, which includes a third expansion valve 291 and a second heat exchanger 292 connected in sequence. The second heat exchanger 292 is provided with a liquid interface. The third expansion valve 291 is connected to the second liquid reservoir 21, and the second heat exchanger 292 is connected to the first four-way valve 25. In the operation mode of another refrigeration module, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant in the second compressor 27. The high-temperature and high-pressure gaseous refrigerant passes through the second four-way valve 28 and enters the condenser evaporator 3 for condensation, and becomes a medium-temperature and high-pressure liquid refrigerant. The medium-temperature and high-pressure liquid refrigerant enters the second liquid reservoir 21 for buffering, and the second liquid reservoir 21 transports the medium-temperature and high-pressure liquid refrigerant to the third expansion valve 291 for throttling and pressure reduction, and becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the second heat exchanger 292 for evaporation, and becomes a low-temperature and low-pressure gaseous refrigerant. The refrigerant absorbs heat in the second heat exchanger 292, and the water entering the second heat exchanger 292 through the liquid interface absorbs heat and becomes cold water. The cold water can be transported from the second heat exchanger 292 to equipment that needs cold water.

[0050] It can be understood that the refrigeration module 2 has multiple operating modes, and the pipelines and components running in the refrigeration module 2 are different in different operating modes. The above embodiments are two different operating modes of the refrigeration module 2, which are only two of the multiple operating modes of the refrigeration module 2, and the refrigeration module 2 does not have only two operating modes. The different operating modes of the refrigeration module 2 will be described in detail below, and the different operating modes of the refrigeration module 2 can be referred to in the following embodiments.

[0051] The first four-way valve 25 is provided with four connection ports, and the four connection ports are respectively connected to the second four-way valve 28, the first heat exchanger 24, the second heat exchanger 292 and the second gas-liquid separator 26. Exemplarily, the four connection ports of the first four-way valve 25 are connection port c1, connection port d1, connection port e1 and connection port s1. Connection port c1 is connected to the second heat exchanger 292, connection port d1 is connected to the second four-way valve 28, connection port e1 is connected to the first heat exchanger 24, and connection port s1 is connected to the second gas-liquid separator 26. The first four-way valve 25 can control different connection ports to be connected, thereby controlling at least two components among the second four-way valve 28, the first heat exchanger 24, the second heat exchanger 292 and the second gas-liquid separator 26 to be connected.

[0052] The second four-way valve 28 is provided with four connection ports, and the four connection ports are respectively connected to the second compressor 27, the condenser evaporator 3, the first four-way valve 25 and the second gas-liquid separator 26. Exemplarily, the four connection ports of the second four-way valve 28 are connection port c2, connection port d2, connection port e2 and connection port s2. Connection port c2 is connected to connection port d1 of the first four-way valve 25, connection port d2 is connected to the second compressor 27, connection port e2 is connected to the condenser evaporator 3, and connection port s2 is connected to the second gas-liquid separator 26. The second four-way valve 28 can control different connection ports to be connected, thereby controlling at least two components among the second compressor 27, the condenser evaporator 3, the first four-way valve 25 and the second gas-liquid separator 26 to be connected.

[0053] The condenser evaporator 3 is respectively connected to the first gas-liquid separator 11, the first electronic expansion valve 16, the second liquid reservoir 21 and the second four-way valve 28, wherein the first gas-liquid separator 11 and the first electronic expansion valve 16 are connected through the condenser evaporator 3, and the second liquid reservoir 21 and the second four-way valve 28 are connected through the condenser evaporator 3. That is, the heating module 1 and the cooling module 2 share a condenser evaporator 3, which can save the production cost of the air source steam heat pump system, and during the operation of the heating module 1, the low-temperature and low-pressure liquid refrigerant evaporates into a low-temperature and low-pressure gaseous refrigerant in the condenser evaporator 3, and this process absorbs heat. In the operation of the cooling module 2, the high-temperature and high-pressure gaseous refrigerant condenses into a medium-temperature and high-pressure liquid refrigerant in the condenser evaporator 3, and this process releases heat. In this way, the heating module 1 and the cooling module 2 share a condenser evaporator 3, which can reasonably utilize the heat released by the condenser evaporator 3, and can save the power consumed when the air source steam heat pump system is running.

[0054] It can be understood that the components in the above embodiments are connected by pipelines, so that refrigerant, water or steam is transported between the two components through the pipelines. The components in the following embodiments are also connected by pipelines.

[0055] Through the above-mentioned embodiments, the air source steam heat pump system of the present application includes a heating module 1, a cooling module 2, and a condenser evaporator 3. The heating module 1 includes a first output module 17, and the steam generated by the heating module 1 can be output through the first output module 17. The cooling module 2 includes a second output module 29, and the cold water generated by the cooling module 2 can be output through the second output module 29. The cooling module 2 includes a first heat exchanger 24 and a second heat exchanger 292. The first heat exchanger 24 and the second heat exchanger 292 are in different pipelines of the cooling module 2. When the refrigerant passes through different pipelines, water of different temperatures can be generated. On the one hand, the air source steam heat pump system of the present application can produce cold water while producing steam, which meets the needs of industrial enterprises for process water cooling while using steam. On the other hand, the heating module 1 and the cooling module 2 of the present application share a condenser evaporator, which can reduce the cost of the heat pump system, thereby reducing the production cost of industrial enterprises.

[0056] The air source steam heat pump system includes a variety of operating modes. In different air source steam heat pump system operating modes, the operating modes of the heating module 1 and / or the cooling module 2 are also different. The operating modes of the air source steam heat pump system include a first mode, a second mode, a third mode and a fourth mode. In the first mode, the air source steam heat pump system performs air source steam production. In the second mode, the air source steam heat pump system simultaneously cools water and steam. In the third mode, the air source steam heat pump system performs air source production of medium-temperature hot water. In the fourth mode, the air source steam heat pump system performs air source cooling of water. It can be understood that the temperature of cold water is lower than that of medium-temperature hot water. The temperature of cold water can be 0-5°C, and the temperature of medium-temperature hot water is 35-60°C.

[0057] As attached Figure 2 As shown, in some embodiments, the air source steam heat pump system operates in the first mode to produce steam. At this time, in the refrigeration module 2, the low-temperature and low-pressure superheated refrigerant gas is compressed into a high-temperature and high-pressure gaseous refrigerant through the second compressor 27. The high-temperature and high-pressure gaseous refrigerant enters the second four-way valve 28, and enters the condenser evaporator 3 through the connection port e2 of the second four-way valve 28. The high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant in the condenser evaporator 3. The medium-temperature and high-pressure liquid refrigerant enters the second liquid storage 21, and then enters the second economizer 22 for supercooling, and then throttles and reduces the pressure through the second electronic expansion valve 23 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the first heat exchanger 24 to evaporate, and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the second gas-liquid separator 26 through the connection port e1 and the connection port s1 of the first four-way valve 25, and then returns to the air intake port of the second compressor 27 for compression.

[0058] In the heating module 1, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the first compressor 12. The high-temperature and high-pressure gaseous refrigerant enters the high-efficiency tank 13 for heat exchange and condenses into a high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is buffered by the first liquid storage tank 14, and enters the first economizer 15 for supercooling, and then throttled into a low-temperature and low-pressure liquid refrigerant by the first electronic expansion valve 16. The low-temperature and low-pressure liquid refrigerant enters the condenser evaporator 3 and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant returns to the air intake of the first compressor 12 through the first gas-liquid separator 11. The high-temperature water heated by the high-efficiency tank 13 flashes into steam in the flash water tank 171 of the first output module 17 and is transported to the outside to be transported to the equipment that needs steam.

[0059] As attached Figure 3 As shown, in some embodiments, the air source steam heat pump system operates in the second mode, cooling water and steam at the same time. At this time, in the refrigeration module 2, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the second compressor 27, and enters the second four-way valve 28, and enters the condenser evaporator 3 through the connection port e2. The high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant in the condenser evaporator 3. The medium-temperature and high-pressure liquid refrigerant enters the second liquid storage 21 for buffering, and then throttles and reduces the pressure through the third expansion valve 291 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the second heat exchanger 292 and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the second gas-liquid separator 26 through the connection port c1 and the connection port s1 of the first four-way valve 25 for gas-liquid separation, and the gaseous refrigerant returns to the air intake port of the second compressor 27 for compression. The cold water produced from the second heat exchanger 292 is transported to the equipment requiring cold water through the liquid interface of the second heat exchanger 292 .

[0060] In the heating module 1, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the first compressor 12. The high-temperature and high-pressure gaseous refrigerant enters the high-efficiency tank 13 for heat exchange and condenses into a high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is buffered by the first liquid storage tank 14, and enters the first economizer 15 for supercooling, and then throttled into a low-temperature and low-pressure liquid refrigerant by the first electronic expansion valve 16. The low-temperature and low-pressure liquid refrigerant enters the condenser evaporator 3 and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant returns to the air intake of the first compressor 12 through the first gas-liquid separator 11. The high-temperature water heated by the high-efficiency tank 13 flashes into steam in the flash water tank 171 of the first output module 17 and is transported to the outside to be transported to the equipment that needs steam.

[0061] As attached Figure 4As shown, in some embodiments, the air source steam heat pump system operates in the third mode, and the air source steam heat pump system produces medium-temperature hot water from the air source. At this time, in the refrigeration module 2, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the second compressor 27. The high-temperature and high-pressure gaseous refrigerant enters the second four-way valve 28, and enters the first four-way valve 25 through the connection port c2 of the second four-way valve 28, and then enters the second heat exchanger 292 through the connection port c1 of the first four-way valve 25. The high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant in the second heat exchanger 292. The medium-temperature and high-pressure liquid refrigerant enters the second liquid storage tank 21, and then enters the second economizer 22 for supercooling, and then throttles and reduces the pressure through the second electronic expansion valve 23 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the first heat exchanger 24 to evaporate and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the second gas-liquid separator 26 through the connection ports e1 and s1 of the first four-way valve 25, and then returns to the suction port of the second compressor 27 for compression. The medium-temperature hot water obtained from the second heat exchanger 292 is transported to the equipment requiring medium-temperature hot water through the liquid interface of the second heat exchanger 292.

[0062] As attached Figure 5 As shown, in some embodiments, the air source steam heat pump system operates in the fourth mode, and the air source steam heat pump system performs air source cooling water. At this time, in the refrigeration module 2, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the second compressor 27. The high-temperature and high-pressure gaseous refrigerant enters the second four-way valve 28, enters the first four-way valve 25 through the connection port c2, and then enters the first heat exchanger 24 through the connection port e1 pipe. The high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant in the first heat exchanger 24, passes through the second electronic expansion valve 23 (fully open), passes through the second economizer 22, and then enters the second liquid storage tank 21, and then throttles and reduces the pressure through the third expansion valve 291 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the second heat exchanger 292 and evaporates into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant enters the second gas-liquid separator 26 through the connection ports c1 and s1 of the first four-way valve 25, and then returns to the suction port of the second compressor 27 for compression. The chilled water obtained from the second heat exchanger 292 is transported to the equipment requiring cold water through the liquid interface of the second heat exchanger 292.

[0063] In some embodiments, the liquid interface of the second heat exchanger 292 includes a first interface f and a second interface g, and the first interface f and the second interface g are connected. The air source steam heat pump system includes a defrost module 4, and the defrost module 4 includes a first three-way valve 41 and a second three-way valve 42. The first three-way valve 41 is connected to the first interface f and the flash water tank 171 respectively, and the second three-way valve 42 is connected to the second interface g and the flash water tank 171 respectively. The first interface f can be an inlet or an outlet. When the first interface f is an inlet, the second interface g is an outlet. When the first interface f is an outlet, the second interface g is an inlet. The first three-way valve 41 and the second three-way valve 42 are respectively connected to the flash water tank 171 to form a water cycle.

[0064] Specifically, the first three-way valve 41 includes three connections, namely, connection port B1, connection port B2, and connection port B3. Connection port B1 is connected to the second heat exchanger 292, connection port B2 is connected to the flash water tank 171, and connection port B3 is connected to an external device that needs cold water. Similarly, the second three-way valve 42 includes three connections, namely, connection port A1, connection port A2, and connection port A3. Connection port A1 is connected to the second heat exchanger 292, connection port A2 is connected to the flash water tank 171, and connection port A3 is connected to an external device that needs cold water. When the air source steam heat pump system makes cold water, connection port B1 is connected to connection port B3, and connection port A1 is connected to connection port A3, so that the second heat exchanger 292 forms a water cycle with an external device that needs cold water, and cold water can be continuously delivered to the device that needs cold water. The device that needs cold water can be a heat exchanger.

[0065] In some embodiments, the air source steam heat pump system includes a fifth mode for defrosting the first heat exchanger 24 . When the air source steam heat pump system operates in the fifth mode, in the refrigeration module 2, the low-temperature and low-pressure liquid refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the second compressor 27 and enters the second four-way valve 28, enters the first four-way valve 25 through the connection port c2 of the second four-way valve 28, enters the first heat exchanger 24 through the connection port e1 of the first four-way valve 25 to release heat and defrost, and the high-temperature and high-pressure gaseous refrigerant in the first heat exchanger 24 is condensed into a medium-temperature and high-pressure liquid refrigerant, passes through the second electronic expansion valve 23 (fully open) and the second economizer 22, and then enters the second liquid storage tank 21, and then throttled and reduced in pressure by the third expansion valve 291 to become a low-temperature and low-pressure liquid refrigerant, enters the second heat exchanger 292 to evaporate, evaporates into a low-temperature and low-pressure gaseous refrigerant, enters the second gas-liquid separator 26 through the connection ports c1 and s1 of the first four-way valve 25, and then returns to the suction port of the second compressor 27 for compression. When the air source steam heat pump system operates in the fifth mode, the operation mode of the refrigeration module 2 is the same as that of the air source steam heat pump system in the fourth mode. The piping when the air source steam heat pump system operates in the fifth mode can be seen in Figure 5The first heat exchanger 24 may be a fin heat exchanger.

[0066] In the fifth mode, heat is induced from the flash water tank 171 to the second heat exchanger 292 . After the second heat exchanger 292 uses the heat, the water is transported back to the flash water tank 171 , so that the heat in the flash water tank 171 can be reasonably utilized.

[0067] See again the attached Figure 1 In some embodiments, the defrost module 4 is provided with a first circulating water pump 43, and the first circulating water pump 43 is provided on the pipeline between the second heat exchanger 292 and the second three-way valve 42. The first circulating water pump 43 is used to promote the water circulation between the flash water tank 171 and the second heat exchanger 292, so that the hot water in the flash water tank 171 returns to the flash water tank 171 after evaporation in the second heat exchanger 292. Alternatively, the first circulating water pump 43 is used to promote the water circulation between the external equipment requiring cold water and the second heat exchanger 292, and the cold water produced by the second heat exchanger 292 can be transported to the external equipment requiring cold water. After the cold water becomes hot in the external equipment requiring cold water, it returns to the second heat exchanger 292 for condensation. The second heat exchanger 292 can be a plate heat exchanger.

[0068] See again the attached Figure 1-3 In some embodiments, the first economizer 15 is provided with a first inlet h1, a second inlet h3, a first outlet h2, and a second outlet h4. The first inlet h1 is connected to the first liquid reservoir 14, the first outlet h2 is connected to the first electronic expansion valve 16, and the first inlet h1 and the first outlet h2 are in communication. The heating module includes a fourth electronic expansion valve 18, one end of the fourth electronic expansion valve 18 is connected to the first outlet h2, the other end is connected to the second inlet h3, the second outlet h4 is connected to the first compressor 12, and the second inlet h3 and the second outlet h4 are in communication. With such a design, the heat generated by the first economizer 15 can be recovered to the first compressor 12 to avoid heat waste.

[0069] See again the attached Figure 1 and 4 In some embodiments, the second economizer 22 is provided with a third inlet h5, a fourth inlet h7, a third outlet h6 and a fourth outlet h8, the third inlet h5 is connected to the second liquid storage tank 21, the third outlet h6 is connected to the second electronic expansion valve 23, and the third inlet h5 and the third outlet h6 are in communication. The refrigeration module includes a fifth electronic expansion valve 201, one end of the fifth electronic expansion valve 201 is connected to the third outlet h6, the other end is connected to the fourth inlet h7, the fourth outlet h8 is connected to the second compressor 27, and the fourth inlet h7 and the fourth outlet h8 are in communication. With such a design, the heat generated by the second economizer 22 can be recovered to the second compressor 27 to avoid heat waste.

[0070] In some embodiments, a one-way valve 202 is provided on the pipeline between the second liquid storage tank 21 and the condenser evaporator 3. The one-way valve can prevent the refrigerant from flowing back to the second compressor 27, thereby preventing the refrigerant backflow from affecting the operation of the second compressor 27.

[0071] In some embodiments, the high-efficiency tank 13 is provided with a fifth inlet h9, a sixth inlet h11, a fifth outlet h10 and a sixth outlet h12, the fifth inlet h9 is connected to the first compressor 12, the fifth outlet h10 is connected to the first liquid storage tank 14, and the fifth inlet h9 is communicated with the fifth outlet h10; the sixth inlet h11 and the sixth outlet h12 are respectively connected to the flash water tank 171, and the pipeline between the sixth inlet h11 and the flash water tank 171 or the sixth outlet h12 and the flash water tank 171 is provided with a second circulating water pump 19. The water circulation between the high-efficiency tank 13 and the flash water tank 171 requires the second circulating water pump 19 to provide power, so that water can circulate between the high-efficiency tank 13 and the flash water tank 171.

[0072] In some embodiments, the air source steam heat pump system includes a controller (not shown in the figure), which is respectively connected to the heating module, the cooling module, and the condenser evaporator 3, and the controller is used to control the operation of the heating module, the cooling module, and the condenser evaporator 3 to achieve a variety of different air source steam heat pump system operation modes. Exemplarily, the controller is connected to the first gas-liquid separator 11, the first compressor 12, the high-efficiency tank 13, the first liquid reservoir 14, the first economizer 15, the first electronic expansion valve 16, the flash water tank 171, the second liquid reservoir 21, the second economizer 22, the second electronic expansion valve 23, and the first heat exchanger 24, the first four-way valve 25, the second gas-liquid separator 26, the second compressor 27, the second four-way valve 28, the third expansion valve 291, and the second heat exchanger 292 to control their operation, thereby achieving a variety of different air source steam heat pump system operation modes.

[0073] As attached Figure 6 As shown, the present application also provides a heat pump system control method, which is applied to the air source steam heat pump system of any one of the above embodiments, and the control method includes:

[0074] S101: Obtaining an operation instruction, and controlling the heating module, the cooling module, and the condenser evaporator 3 according to the operation instruction, so that the air source steam heat pump system outputs steam or liquids of different temperatures;

[0075] The operation instruction includes at least one of a first-gear cooling instruction, a second-gear cooling instruction, and a steam production instruction, wherein the temperature of the liquid output by the air source steam heat pump system under the first-gear cooling instruction is higher than that under the second-gear cooling instruction. The first-gear instruction is used to produce medium-temperature hot water, and the second-gear instruction is used to produce cold water.

[0076] Exemplarily, when the air source steam heat pump system obtains a first-speed cooling instruction, the air source steam heat pump system operates in the third mode, and the air source steam heat pump system produces medium-temperature hot water from the air source. When the air source steam heat pump system obtains a second-speed cooling instruction, the air source steam heat pump system operates in the fourth mode, and the air source steam heat pump system produces air-source cooling water. When the air source steam heat pump system obtains a steam-making instruction, the air source steam heat pump system operates in the first mode to produce steam. When the air source steam heat pump system obtains a second-speed cooling instruction and a steam-making instruction, the air source steam heat pump system operates in the second mode, and cools water and steam at the same time. The specific operation of the first mode, the second mode, the third mode and the fourth mode is detailed in the above embodiments and will not be repeated here.

[0077] In some embodiments, the air source steam heat pump system includes a defrost module 4, which includes a first three-way valve 41 and a second three-way valve 42. The first three-way valve 41 is connected to the first interface f and the flash water tank 171 respectively, and the second three-way valve 42 is connected to the second interface g and the flash water tank 171 respectively. Figure 6 As shown, the control method includes:

[0078] S201: triggering a defrost instruction, and defrosting the first heat exchanger 24 according to the defrost instruction.

[0079] The defrost instruction includes a first defrost instruction, and the first defrost instruction is used to instruct the first heat exchanger 24 to defrost. There is no temporal relationship between step S101 and step S201, and step S101 and step S201 can be run independently without interfering with each other.

[0080] Exemplarily, when the first defrost instruction is triggered, the air source steam heat pump system operates in the fifth mode to defrost the first heat exchanger 24. The specific operation of the fifth mode is detailed in the above embodiment and will not be repeated here.

[0081] In some embodiments, the conditions for triggering the defrost instruction include:

[0082] It is monitored that the usage time of the first heat exchanger 24 exceeds the first preset time. When the operation time of the first heat exchanger 24 reaches the preset time, more frost will form. It can be determined whether to defrost the first heat exchanger 24 according to the operation time of the first heat exchanger 24. This method does not need to set other detectors to detect the amount of frost, which can reduce the manufacturing cost of the air source steam heat pump system.

[0083] It can be understood that the specific duration of the first preset duration is determined according to the actual situation of the first heat exchanger 24 .

[0084] In some embodiments, the first heat exchanger 24 is provided with a first frost detector for monitoring the amount of frost on the first heat exchanger 24. The conditions for triggering the defrost instruction include:

[0085] It is detected that the frost amount of the first heat exchanger 24 exceeds the first preset value. The first frost detector can be set to defrost when the frost amount reaches the preset value, and the frost amount can be judged more accurately and defrost at an appropriate time.

[0086] It can be understood that the specific value of the first preset value is determined according to the actual situation of the first heat exchanger 24 .

[0087] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An air source steam heat pump system, characterized in that: The air source steam heat pump system comprises a heating module (1), a cooling module (2), and a condenser evaporator (3); The heating module (1) comprises a first gas-liquid separator (11), a first compressor (12), a high-efficiency tank (13), a first liquid storage device (14), a first economizer (15), and a first electronic expansion valve (16) which are connected in sequence; The heating module (1) comprises a first output module (17), the first output module (17) comprises a flash water tank (171), and the flash water tank (171) is connected to the high-efficiency tank (13); The refrigeration module (2) comprises a second liquid storage device (21), a second economizer (22), a second electronic expansion valve (23), a first heat exchanger (24), a first four-way valve (25), a second gas-liquid separator (26), a second compressor (27) and a second four-way valve (28) which are connected in sequence; The refrigeration module (2) comprises a second output module (29), the second output module (29) comprises a third expansion valve (291) and a second heat exchanger (292) which are connected in sequence, the second heat exchanger (292) is provided with a liquid interface, the third expansion valve (291) is connected to the second liquid storage device (21), and the second heat exchanger (292) is connected to the first four-way valve (25); The first four-way valve (25) is provided with four connecting ports, and the four connecting ports are respectively connected to the second four-way valve (28), the first heat exchanger (24), the second heat exchanger (292), and the second gas-liquid separator (26); The second four-way valve (28) is provided with four connection ports, and the four connection ports are respectively connected to the second compressor (27), the condenser evaporator (3), the first four-way valve (25), and the second gas-liquid separator (26); The condenser evaporator (3) is respectively connected to the first gas-liquid separator (11), the first electronic expansion valve (16), the second liquid reservoir (21) and the second four-way valve (28), wherein the first gas-liquid separator (11) and the first electronic expansion valve (16) are connected via the condenser evaporator (3), and the second liquid reservoir (21) and the second four-way valve (28) are connected via the condenser evaporator (3).

2. The air source steam heat pump system according to claim 1, characterized in that: The liquid interface of the second heat exchanger (292) comprises a first interface and a second interface, and the first interface and the second interface are in communication; The air source steam heat pump system comprises a defrost module (4), the defrost module (4) comprising a first three-way valve (41) and a second three-way valve (42), the first three-way valve (41) being connected to the first interface and the flash water tank (171) respectively, and the second three-way valve (42) being connected to the second interface and the flash water tank (171) respectively.

3. The air source steam heat pump system according to claim 2, characterized in that: The defrost module (4) is provided with a first circulating water pump (43), and the first circulating water pump (43) is arranged on a pipeline between the second heat exchanger (292) and the second three-way valve (42).

4. The air source steam heat pump system according to claim 3, characterized in that: The first economizer (15) is provided with a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is connected to the first liquid reservoir (14), the first outlet is connected to the first electronic expansion valve (16), and the first inlet and the first outlet are in communication; The heating module comprises a fourth electronic expansion valve (18), one end of the fourth electronic expansion valve (18) is connected to the first outlet, and the other end is connected to the second inlet, the second outlet is connected to the first compressor (12), and the second inlet and the second outlet are in communication.

5. The air source steam heat pump system according to claim 4, characterized in that: The second economizer (22) is provided with a third inlet, a fourth inlet, a third outlet and a fourth outlet, the third inlet is connected to the second liquid storage device (21), the third outlet is connected to the second electronic expansion valve (23), and the third inlet and the third outlet are in communication; The refrigeration module comprises a fifth electronic expansion valve (201), one end of the fifth electronic expansion valve (201) is connected to the third outlet, and the other end is connected to the fourth inlet, the fourth outlet is connected to the second compressor (27), and the fourth inlet and the fourth outlet are in communication.

6. The air source steam heat pump system according to claim 5, characterized in that: A one-way valve (202) is provided on the pipeline between the second liquid storage container (21) and the condenser evaporator (3); and / or The high-efficiency tank (13) is provided with a fifth inlet, a sixth inlet, a fifth outlet and a sixth outlet, the fifth inlet is connected to the first compressor (12), the fifth outlet is connected to the first liquid storage device (14), and the fifth inlet is in communication with the fifth outlet; The sixth inlet and the sixth outlet are respectively connected to the flash water tank (171), and a second circulating water pump (19) is provided in a pipeline between the sixth inlet and the flash water tank (171) or between the sixth outlet and the flash water tank (171).

7. The air source steam heat pump system according to any one of claims 1 to 6, characterized in that: The air source steam heat pump system comprises a controller, wherein the controller is respectively connected to the heating module (1), the cooling module (2), and the condensing evaporator (3), and the controller is used to control the operation of the heating module (1), the cooling module (2), and the condensing evaporator (3).

8. A heat pump system control method, characterized in that: The heat pump system control method is applied to the air source steam heat pump system according to any one of claims 2 to 6, and the control method comprises: Obtaining an operation instruction, and controlling the heating module (1), the cooling module (2), and the condenser evaporator (3) according to the operation instruction, so that the air source steam heat pump system outputs steam or liquids of different temperatures; Among them, the operating instructions include at least one of a first-speed refrigeration instruction, a second-speed refrigeration instruction, and a steam production instruction, wherein the liquid temperature output by the air source steam heat pump system under the first-speed refrigeration instruction is higher than the temperature under the second-speed refrigeration instruction.

9. The heat pump system control method according to claim 8, characterized in that: The air source steam heat pump system comprises a defrost module (4), the defrost module (4) comprises a first three-way valve (41) and a second three-way valve (42), the first three-way valve (41) being connected to the first interface and the flash water tank (171) respectively, and the second three-way valve (42) being connected to the second interface and the flash water tank (171) respectively, and the control method comprises: triggering a defrost instruction, and providing the first heat exchanger (24) according to the defrost instruction; The defrost instruction comprises a first defrost instruction, wherein the first defrost instruction is used to instruct the first heat exchanger (24) to defrost.

10. The heat pump system control method according to claim 9, characterized in that: The conditions for triggering the defrost instruction include: It is detected that the usage time of the first heat exchanger (24) exceeds a first preset time; or The first heat exchanger (24) is provided with a first frost detector for monitoring the amount of frost on the first heat exchanger (24), and the conditions for triggering the defrost instruction include: It is monitored that the amount of frost on the first heat exchanger (24) exceeds a first preset value.

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