Heat pump system

Abstract

The application provides a heat pump system, and relates to the technical field of heat pumps. The heat pump system comprises multiple heat exchange subsystems, a first heat exchange branch and a second heat exchange branch. The heat exchange subsystems comprise first and second circulating loops arranged adjacently. The first heat exchange branch selectively communicates with the first circulating loop, and the second heat exchange branch selectively communicates with the second circulating loop. Therefore, the heat pump system can adjust the working mode according to the needs by the selective communication of the first and second heat exchange branches. The multiple heat exchange subsystems can operate in single mode or multiple modes (in series or in parallel), and the load can be distributed as needed. The heat pump system can solve the working condition of multiple heat demand existing simultaneously, thereby improving the overall system efficiency.

Description

Technical Field

[0001] This application relates to the field of heat pump technology, and more particularly to a heat pump system. Background Technology

[0002] Existing heat pump systems typically suffer from low heat exchange efficiency, limited operating modes, and insufficient system scalability. Especially when handling heat exchange tasks across multiple temperature ranges, traditional heat pump systems often struggle to meet the demands for high efficiency and flexibility. Furthermore, with increasing emphasis on energy efficiency, improving the overall energy efficiency ratio of heat pump systems and reducing energy consumption has become a pressing technical challenge in the field of heat pump technology. Utility Model Content

[0003] This application provides a heat pump system that, through a multi-loop design and flexible heat exchange branch configuration, achieves efficient and flexible heat pump operation, meets the heating needs of different working conditions, and at least partially solves the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a heat pump system is provided, comprising:

[0005] Multiple heat exchange subsystems, a first heat exchange branch, and a second heat exchange branch.

[0006] Each heat exchange subsystem includes a first circulation loop and a second circulation loop arranged adjacent to each other. The first heat exchange branch is selectively connected to the first circulation loop of at least one heat exchange subsystem, and the second heat exchange branch is selectively connected to the second circulation loop of the same heat exchange subsystem.

[0007] In some embodiments, the heat pump system further includes an intermediate heat exchanger, which includes independent first and second branches; the first circulation loop includes a first evaporator, a first compressor, a first branch, and a first throttling valve in fluid communication.

[0008] The second circulation loop includes a second evaporator, a second compressor, a second branch circuit, and a second throttle valve, all in fluid communication.

[0009] The intermediate heat exchanger has a first branch and a second branch that are independent of each other. The first branch is connected in series with the first circulation loop, and the second branch is connected in series with the second circulation loop.

[0010] The first evaporator has a third branch and a fourth branch that are independent of each other. The third branch is connected in series with the first heat exchange branch, and the fourth branch is connected in series with the first circulation loop.

[0011] The second evaporator has a fifth branch and a sixth branch that are independent of each other. The fifth branch is connected in series with the second heat exchange branch, and the sixth branch is connected in series with the second circulation loop.

[0012] In some embodiments, the inlet of the fourth branch is connected to the outlet of the first throttle valve, the outlet of the fourth branch is connected to the inlet of the first compressor, the outlet of the first compressor is connected to the inlet of the first branch, and the outlet of the first branch is connected to the inlet of the first throttle valve.

[0013] The inlet of the sixth branch is connected to the outlet of the second compressor, the outlet of the sixth branch is connected to the inlet of the second throttle valve, the outlet of the second throttle valve is connected to the inlet of the second branch, and the outlet of the second branch is connected to the inlet of the second compressor.

[0014] In some embodiments, there are multiple first heat exchange branches, each first heat exchange branch having a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet being connected to the inlet of a third branch of at least one heat exchange subsystem, and the first heat exchange outlet being connected to the outlet of the third branch connected to the first heat exchange inlet.

[0015] There are multiple second heat exchange branches. Each first heat exchange branch has a second heat exchange inlet and a second heat exchange outlet. The second heat exchange inlet is connected to the inlet of at least one fifth branch of a heat exchange subsystem, and the second heat exchange outlet is connected to the outlet of the fifth branch connected to the second heat exchange inlet. In the same heat exchange subsystem, the first evaporator of the first circulation loop is connected to the first heat exchange branch, and the second evaporator of the second circulation loop is connected to the second heat exchange branch.

[0016] In some embodiments, the number of first heat exchange branches is the same as the number of second heat exchange branches.

[0017] In some embodiments, one of the first and second circulation loops is a low-temperature circulation loop, and the other is a high-temperature circulation loop.

[0018] In some embodiments, the heat pump system further includes: a third circulation loop disposed adjacent to the second circulation loop, the third circulation loop including a circulating water pump and a flash tank in fluid communication;

[0019] An intermediate heat exchanger, which includes an independent first branch and a second branch.

[0020] The first circulation loop includes a first evaporator, a first compressor, a first branch, and a first throttle valve that are in fluid communication. The first evaporator has a third branch and a fourth branch that are independent of each other. The third branch is connected in series with the first heat exchange branch, and the fourth branch is connected in series with the first circulation loop.

[0021] The second circulation loop includes a second evaporator, a second compressor, a second branch, and a second throttling valve that are in fluid communication. The second evaporator has a fifth branch and a sixth branch that are independent of each other. The fifth branch and the second heat exchange branch are connected in series with the third circulation loop, and the sixth branch is connected in series with the second circulation loop.

[0022] In some embodiments, the inlet of the fourth branch is connected to the outlet of the first throttle valve, the outlet of the fourth branch is connected to the inlet of the first compressor, the outlet of the first compressor is connected to the inlet of the first branch, and the outlet of the first branch is connected to the inlet of the first throttle valve.

[0023] The inlet of the fifth branch is connected to the outlet of the circulating water pump, and the outlet of the fifth branch is connected to the inlet of the flash tank. The first outlet of the flash tank is used to discharge steam, and the second outlet of the flash tank is connected to the inlet of the circulating water pump.

[0024] The inlet of the sixth branch is connected to the outlet of the second compressor, the outlet of the sixth branch is connected to the inlet of the second throttle valve, the outlet of the second throttle valve is connected to the inlet of the second branch, and the outlet of the second branch is connected to the inlet of the second compressor.

[0025] In some embodiments, there are multiple first heat exchange branches, each first heat exchange branch having a first heat exchange inlet and a first heat exchange outlet, the first heat exchange inlet being connected to the inlet of a third branch of at least one heat exchange subsystem, and the first heat exchange outlet being connected to the outlet of the third branch connected to the first heat exchange inlet.

[0026] There are multiple second heat exchange branches, each with a second heat exchange inlet and a second heat exchange outlet. The second heat exchange inlet is connected to the inlet of the circulating water pump of at least one heat exchange subsystem, and the second heat exchange outlet is connected to the outlet of the flash tank of the branch where the second heat exchange inlet is located. In the same heat exchange subsystem, the first evaporator of the first circulation loop is connected to the first heat exchange branch, and the circulating water pump of the second circulation loop is connected to the second heat exchange branch.

[0027] In some embodiments, each of the first heat exchange branches and each of the second heat exchange branches is provided with a valve, and the heat exchange subsystem is selectively connected by closing the valve.

[0028] In some embodiments, the plurality of heat exchange subsystems include a first heat exchange subsystem and a plurality of second heat exchange subsystems. In the second heat exchange subsystem, the third circulation loop further includes an on / off valve. The inlet of the on / off valve is connected to the outlet of the fifth branch of the second evaporator, and the outlet of the on / off valve is connected to the inlet of the flash tank.

[0029] The technical advantage of this application lies in providing a heat pump system comprising multiple heat exchange subsystems, a first heat exchange branch, and a second heat exchange branch. Each heat exchange subsystem includes an adjacent first circulation loop and a second circulation loop. The first heat exchange branch is selectively connected to the first circulation loop, and the second heat exchange branch is selectively connected to the second circulation loop. Therefore, this heat pump system, through the selective connectivity of the first and second heat exchange branches, allows the system to adjust its operating mode as needed. This enables multiple heat exchange subsystems to operate in single-mode or multi-mode (series or parallel) operation, and allows for load distribution as required, addressing situations where multiple heating demands exist simultaneously, thereby improving the overall system efficiency.

[0030] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0033] Figure 1 This is a schematic diagram of the structure of the first heat pump system provided in the embodiments of this application in the first mode;

[0034] Figure 2 This is a schematic diagram of the structure of the first heat pump system provided in the embodiments of this application in the second mode;

[0035] Figure 3 This is a schematic diagram of the structure of the first heat pump system provided in the embodiments of this application in the third mode;

[0036] Figure 4 This is a schematic diagram of the structure of the first heat pump system provided in the embodiments of this application in the fourth mode;

[0037] Figure 5 This is a schematic diagram of the heat pump system application structure provided in the embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the structure of the second heat pump system provided in the embodiments of this application in the first mode;

[0039] Figure 7This is a schematic diagram of the structure of the second heat pump system provided in the embodiments of this application in the second mode;

[0040] Figure 8 This is a schematic diagram of the structure of the second heat pump system provided in the embodiments of this application in the third mode;

[0041] Figure 9 This is a schematic diagram of the structure of the second type of heat pump system provided in the embodiments of this application in the fourth mode.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1-Heat exchange subsystem; 1a-First heat exchange subsystem; 1b-Second heat exchange subsystem; 11-First circulation loop; 12-Second circulation loop; 13-Third circulation loop; 101-First evaporator; 102-First compressor; 103-Intermediate heat exchanger; 104-First throttling valve; 105-Second evaporator; 106-Second compressor; 107-Second throttling valve; 108-Circulating water pump; 109-Flash tank; 110-On / off valve;

[0044] 103a - First Branch Road; 103b - Second Branch Road; 101a - Third Branch Road; 101b - Fourth Branch Road; 105a - Fifth Branch Road; 105b - Sixth Branch Road;

[0045] 2-First heat exchange branch; 21a-First heat exchange inlet; 21b-First heat exchange outlet; 201-First valve; 202-Second valve; 203-Third valve; 211-First sub-branch; 212-Second sub-branch; 213-Third sub-branch;

[0046] 3-Second heat exchange branch; 31a-Second heat exchange inlet; 31b-Second heat exchange outlet; 301-Fourth valve; 302-Fifth valve; 303-Sixth valve; 311-Fourth sub-branch; 312-Fifth sub-branch; 313-Sixth sub-branch; 314-Seventh sub-branch; 315-Eighth sub-branch; 316-Ninth sub-branch. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0048] The current industrial sector faces diverse heating scenarios, and heat pump products often exhibit highly customized characteristics in specific project solutions and product designs. This places high demands on enterprises' long-term stable development, product development costs, quality control, and project maintenance. Product standardization and solution customization are relatively good solutions to the aforementioned problems. For some heating industries, using modular standard products as the core, and combining multi-module series and parallel architecture with system cascade control to meet different heat consumption and energy-saving index requirements, will bring better economic benefits to heat pump manufacturers and users.

[0049] Taking lithium battery production as an example, environmental dehumidification and drying are high-energy-consuming processes in lithium battery manufacturing. Data shows that temperature and humidity control in lithium battery workshops accounts for approximately 43% of total energy consumption, with 66% of that consumed in the regeneration heating stage of dehumidifiers. Similarly, manufacturing processes such as coating, electrolyte injection, and formation all require baking at different temperatures to remove moisture or solvents from the electrodes or batteries. This not only means that battery companies face significant challenges in reducing energy consumption through temperature and humidity control in their workshops, but also signifies a broad market prospect for using heat pumps to replace traditional electric heating.

[0050] To address the low overall energy efficiency and high energy consumption of existing heat pump systems, this application provides a heat pump system comprising multiple heat exchange subsystems, a first heat exchange branch, and a second heat exchange branch. Each heat exchange subsystem includes an adjacent first circulation loop and a second circulation loop. The first heat exchange branch selectively connects to the first circulation loop of at least one heat exchange subsystem, and the second heat exchange branch selectively connects to the second circulation loop of the same heat exchange subsystem. Therefore, this heat pump system, through the selective connectivity of the first and second heat exchange branches, allows the system to adjust its operating mode as needed. Furthermore, the multiple heat exchange subsystems can operate in single or multiple modes (series or parallel), and the load can be distributed as needed, addressing situations where multiple heating demands exist simultaneously, thereby improving the overall system efficiency.

[0051] Please see Figure 1 A first type of heat pump system is provided, which is a cascade heat pump system. The heat pump system may include: multiple heat exchange subsystems 1, a first heat exchange branch 2 and a second heat exchange branch 3. Each heat exchange subsystem 1 includes a first circulation loop 11 and a second circulation loop 12 arranged adjacent to each other. The first heat exchange branch 2 is selectively connected to the first circulation loop 11 of at least one heat exchange subsystem 1, and the second heat exchange branch 3 is selectively connected to the second circulation loop 12 of the same heat exchange subsystem 1.

[0052] It is understandable that each heat exchange subsystem 1 may include other circulation loops in addition to the first circulation loop 11 and the second circulation loop 12. That is, each heat exchange subsystem 1 may include multi-stage circulation loops, which can achieve higher temperature outlet requirements to meet the needs of different products.

[0053] In some embodiments, the first heat pump system further includes an intermediate heat exchanger 103, which includes a first branch 103a and a second branch 103b that are independent of each other, so that the first circulation loop 11 and the second circulation loop 12 exchange heat through the intermediate heat exchanger 103.

[0054] Understandably, the intermediate heat exchanger 103 has an independent design, allowing each loop to focus on a specific thermal management task. For example, the first loop 11 can be used for heating, while the second loop 12 can be used for cooling, thus enabling more complex thermal management strategies. Furthermore, if the first loop 11 fails or requires maintenance, the second loop 12 can continue to operate normally, achieving fault isolation and improving system reliability and maintainability. Moreover, the independent design enables the intermediate heat exchanger 103 to achieve efficient heat transfer between the two loops, maximizing heat exchange efficiency, reducing energy loss, and improving the overall system efficiency.

[0055] Intermediate heat exchanger 103 includes, but is not limited to, evaporator-condenser. Due to the efficient heat exchange during evaporation and condensation, the system can reduce energy consumption, thereby achieving energy-saving effects.

[0056] The first circulation loop 11 includes a first evaporator 101, a first compressor 102, a first branch 103a of an intermediate heat exchanger 103, and a first throttle valve 104, all in fluid communication.

[0057] The first evaporator 101 has a third branch 101a and a fourth branch 101b that are independent of each other. The third branch 101a is connected in series with the first heat exchange branch 2, and the fourth branch 101b is connected in series with the first circulation loop 11.

[0058] Understandably, the first evaporator 101 has an independent design, allowing each branch to focus on a specific thermal management task. For example, the third branch 101a can focus on the heat exchange process, while the fourth branch 101b can focus on the thermal management of the circulation loop, thus enabling more complex thermal management strategies. Furthermore, both the third branch 101a and the fourth branch 101b can operate under their respective optimal conditions, allowing for optimization of the overall system performance, thereby improving energy efficiency and reducing operating costs.

[0059] In the first circulation loop 11, the inlet of the fourth branch 101b is connected to the outlet of the first throttle valve 104, the outlet of the fourth branch 101b is connected to the inlet of the first compressor 102, the outlet of the first compressor 102 is connected to the inlet of the first branch 103a, and the outlet of the first branch 103a is connected to the inlet of the first throttle valve 104. Therefore, the fluid can flow clockwise in the first circulation loop 11, forming a closed loop, allowing continuous heat exchange and pressure changes, ensuring stable system operation. The first compressor 102 compresses the low-pressure, low-temperature refrigerant gas into a high-pressure, high-temperature gas, increasing the refrigerant's energy and enabling it to release heat in the intermediate heat exchanger 103. In the first branch 103a (typically a condenser) of the intermediate heat exchanger 103, the high-pressure, high-temperature refrigerant releases heat and condenses into a liquid, releasing heat into the environment. At the first throttle valve 104, the refrigerant experiences a pressure reduction and partial evaporation, resulting in a temperature drop.

[0060] Therefore, through the first circulation loop 11, the system can continuously absorb heat from one area and release it to another area to achieve the purpose of cooling or heating.

[0061] In some embodiments, the second circulation loop 12 includes a second evaporator 105, a second compressor 106, a second branch 103b of an intermediate heat exchanger 103, and a second throttle valve 107 in fluid communication.

[0062] The second evaporator 105 has a fifth branch 105a and a sixth branch 105b that are independent of each other. The fifth branch 105a is connected in series with the second heat exchange branch 3, and the sixth branch 105b is connected in series with the second circulation loop 12.

[0063] Understandably, the second evaporator 105 has an independent design, allowing each branch to focus on specific thermal management tasks. For example, the fifth branch 105a can focus on the heat exchange process, while the sixth branch 105b can focus on the thermal management of the circulation loop, thus enabling more complex thermal management strategies. Furthermore, both the fifth branch 105a and the sixth branch 105b can operate under their respective optimal conditions, allowing for optimization of the overall system performance, thereby improving energy efficiency and reducing operating costs.

[0064] In the second circulation loop 12, the inlet of the sixth branch 105b is connected to the outlet of the second compressor 106, the outlet of the sixth branch 105b is connected to the inlet of the second throttle valve 107, the outlet of the second throttle valve 107 is connected to the inlet of the second branch 103b, and the outlet of the second branch 103b is connected to the inlet of the second compressor 106. Therefore, the fluid can flow clockwise in the second circulation loop 12, forming a closed loop, allowing continuous heat exchange and pressure changes, ensuring stable system operation. The second compressor 106 compresses the low-pressure, low-temperature refrigerant gas into a high-pressure, high-temperature gas, increasing the refrigerant's energy so that it can release heat in the subsequent intermediate heat exchanger 103. In the sixth branch 105b (typically a condenser) of the intermediate heat exchanger 103, the high-pressure, high-temperature refrigerant releases heat and condenses into a liquid, releasing the heat into the environment. At the second throttle valve 107, the refrigerant experiences a pressure drop and partial evaporation, resulting in a temperature decrease.

[0065] Therefore, through the second circulation loop 12, the system can continuously absorb heat from one area and release it to another area to achieve the purpose of cooling or heating.

[0066] The aforementioned heat pump system optimizes the compression, throttling, and heat exchange processes through the first circulation loop 11 and the second circulation loop 12. This reduces energy consumption, achieves energy-saving effects, and helps to lower operating costs and improve economic efficiency.

[0067] In some embodiments, there are multiple first heat exchange branches 2, each first heat exchange branch 2 having a first heat exchange inlet 21a and a first heat exchange outlet 21b. The first heat exchange inlet 21a is connected to the inlet of a third branch 101a of at least one heat exchange subsystem 1, and the first heat exchange outlet 21b is connected to the outlet of the third branch 101a connected to the first heat exchange inlet 21a.

[0068] There are multiple second heat exchange branches 3. Each second heat exchange branch 3 has a second heat exchange inlet 31a and a second heat exchange outlet 31b. The second heat exchange inlet 31a is connected to the inlet of the fifth branch 105a of at least one heat exchange subsystem 1. The second heat exchange outlet 31b is connected to the outlet of the fifth branch 105a connected to the second heat exchange inlet 31a.

[0069] In some embodiments, each of the first heat exchange branch 2 and each of the second heat exchange branch 3 is provided with a valve, and the heat exchange subsystem 1 is selectively connected by closing the valve, thereby meeting the heat demand under different operating conditions.

[0070] It is understood that the multiple first heat exchange branches 2 include a first sub-branch 211, a second sub-branch 212, and a third sub-branch 213. A first valve 201 is installed on the first sub-branch 211, a second valve 202 is installed on the second sub-branch 212, and a third valve 203 is installed on the third sub-branch 213. Therefore, by adjusting each valve, the system can flexibly select different flow paths. For example, valves on specific sub-branches can be opened or closed as needed to adapt to different operating conditions and requirements. Furthermore, by adjusting the valves, more precise thermal management can be achieved, improving the overall system efficiency and performance.

[0071] The multiple second heat exchange branches 3 include a fourth sub-branch 311, a fifth sub-branch 312, and a sixth sub-branch 313. A fourth valve 301 is installed on the fourth sub-branch 311, a fifth valve 302 is installed on the fifth sub-branch 312, and a sixth valve 303 is installed on the sixth sub-branch 313. Therefore, by adjusting each valve, the system can flexibly select different flow paths. For example, valves on specific sub-branches can be opened or closed as needed to adapt to different operating conditions and requirements. Furthermore, by adjusting the valves, more precise thermal management can be achieved, improving the overall system efficiency and performance.

[0072] In some embodiments, in the same heat exchange subsystem 1, the first evaporator 101 of the first circulation loop 11 is connected to the first heat exchange branch 2, and the second evaporator 105 of the second circulation loop 12 is connected to the second heat exchange branch 3. This allows different circulation loops to be connected to different heat exchange branches, which can optimize the heat exchange process of each circulation loop and thus improve the heat exchange efficiency of the entire system.

[0073] In some embodiments, one of the first circulation loop 11 and the second circulation loop 12 is a low-temperature circulation loop and the other is a high-temperature circulation loop. This can optimize the distribution and utilization of thermal energy, achieve energy-saving effects, and reduce operating costs.

[0074] In the case of a first type of heat pump system comprising two heat exchange subsystems 1, the first circulation loop 11 is a low-temperature refrigerant flow path, and the second circulation loop 12 is a high-temperature refrigerant flow path. The first heat exchange inlet 21a of the first heat exchange branch 2 is connected to a heat source, and the second heat exchange inlet 31a of the second heat exchange branch 3 is connected to a heat sink. The heat source can be natural (e.g., solar, geothermal) or man-made (e.g., boiler, heater). The heat sink can be natural (e.g., atmosphere, ocean) or man-made (e.g., cooling tower, radiator). In the heat exchange process, the heat source is the heat outputter, and the heat sink is the heat receiver.

[0075] In some embodiments, the number of first heat exchange branches 2 is the same as the number of second heat exchange branches 3. This arrangement enables the heat pump system to meet various heating needs on the heat source connection side and various cooling needs on the heat sink connection side, thereby simultaneously meeting the different heating needs of various devices under multiple operating conditions.

[0076] The first type of heat pump system can have four operating modes, and each operating mode is described in detail below.

[0077] Please see Figure 1 In the first mode, the first heat exchange subsystem 1a is in operation and the second heat exchange subsystem 1b is in non-operation.

[0078] In the first heat exchange branch 2, the first valve 201 and the third valve 203 are closed, and the second valve 202 is open. The fluid flows from the first heat exchange inlet 21a to the second sub-branch 212 in the first heat exchange branch 2, and then flows through the third branch 101a of the first evaporator 101 in the first heat exchange subsystem 1a to cool the fluid passing through the third branch 101a. At this time, in the first circulation loop 11 at the first heat exchange subsystem 1a, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttling valve 104 and the pressure of the fluid is reduced in the first throttling valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0079] In the second heat exchange branch 3, the fourth valve 301 and the sixth valve 303 are closed, and the fifth valve 302 is open. Fluid flows from the second heat exchange inlet 31a to the fifth sub-branch 312 in the second heat exchange branch 3, and then flows through the fifth branch 105a of the first evaporator 101 in the first heat exchange subsystem 1a to cool the fluid passing through this fifth branch 105a. Meanwhile, in the second circulation loop 12 at the first heat exchange subsystem 1a, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The fluid exiting the second compressor 106 is heated and flows through the sixth branch 105b of the second evaporator 105 to achieve cooling. It then flows to the second throttle valve 107, where the fluid pressure is reduced, allowing it to effectively absorb heat when entering the second branch 103b of the intermediate heat exchanger 103.

[0080] Please see Figure 2 In the second mode, the first heat exchange subsystem 1a is in a non-operational state, and the second heat exchange subsystem 1b is in an operating state.

[0081] In the first heat exchange branch 2, the second valve 202 and the third valve 203 are closed, and the first valve 201 is open. Fluid flows from the first heat exchange inlet 21a to the first sub-branch 211 in the first heat exchange branch 2, and then from the first sub-branch 211 to the third branch 101a of the first evaporator 101 in the second heat exchange subsystem 1b, to cool the fluid in the third branch 101a of the second heat exchange subsystem 1b. At this time, in the first circulation loop 11 of the second heat exchange subsystem 1b, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttling valve 104 and the pressure of the fluid is reduced in the first throttling valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0082] In the second heat exchange branch 3, the fourth valve 301 and the fifth valve 302 are closed, and the sixth valve 303 is open. Fluid flows from the second heat exchange inlet 31a into the sixth sub-branch 313 of the second heat exchange branch 3, and then from the sixth sub-branch 313 to the fifth branch 105a of the first evaporator 101 in the first heat exchange subsystem 1a, to cool the fluid passing through the fifth branch 105a. Meanwhile, in the second circulation loop 12 of the second heat exchange subsystem 1b, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised, and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling. Then it flows to the second throttle valve 107, where the fluid pressure is reduced, allowing it to effectively absorb heat when entering the second branch 103b of the intermediate heat exchanger 103.

[0083] Please see Figure 3 In the third mode, both the first heat exchange subsystem 1a and the second heat exchange subsystem 1b are in operation.

[0084] In the first heat exchange branch 2, the third valve 203 is closed, while the first valve 201 and the second valve 202 are open. With the first valve 201 open, fluid flows from the first heat exchange inlet 21a into the first sub-branch 211 of the first heat exchange branch 2, and then from the first sub-branch 211 into the third branch 101a of the first evaporator 101 in the second heat exchange subsystem 1b, to cool the fluid passing through the third branch 101a in the second heat exchange subsystem 1b. Meanwhile, in the first circulation loop 11 of the second heat exchange subsystem 1b, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised, and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then, it flows to the first throttling valve 104, where the fluid pressure is reduced, allowing it to effectively absorb heat when entering the fourth branch 101b of the first evaporator 101.

[0085] With the second valve 202 open, fluid flows from the first heat exchange inlet 21a into the second sub-branch 212 of the first heat exchange branch 2, and then from the second sub-branch 212 into the third branch 101a of the first evaporator 101 in the first heat exchange subsystem 1a, to cool the fluid passing through the third branch 101a of the first heat exchange subsystem 1a. At this time, in the first circulation loop 11 of the first heat exchange subsystem 1a, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttle valve 104 and the pressure of the fluid is reduced in the first throttle valve 104, so that it can effectively absorb heat when entering the fourth branch 101b of the first evaporator 101.

[0086] In the second heat exchange branch 3, the fourth valve 301 is in the closed state, and the fifth valve 302 and the sixth valve 303 are in the open state.

[0087] With the fifth valve 302 open, fluid flows from the second heat exchange inlet 31a to the fifth sub-branch 312 in the second heat exchange branch 3, and then flows through the fifth branch 105a of the first evaporator 101 in the first heat exchange subsystem 1a to cool the fluid passing through the fifth branch 105a. At this time, in the second circulation loop 12 at the first heat exchange subsystem 1a, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling. Then it flows to the second throttle valve 107 and the pressure of the fluid is reduced in the second throttle valve 107 so that it can effectively absorb heat when it enters the second branch 103b of the intermediate heat exchanger 103.

[0088] With the sixth valve 303 open, fluid flows from the second heat exchange inlet 31a into the sixth sub-branch 313 of the second heat exchange branch 3, and then from the sixth sub-branch 313 to the fifth branch 105a of the first evaporator 101 in the first heat exchange subsystem 1a, to cool the fluid passing through the fifth branch 105a. At this time, in the second circulation loop 12 of the second heat exchange subsystem 1b, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling. Then it flows to the second throttle valve 107 and the pressure of the fluid is reduced in the second throttle valve 107, so that it can effectively absorb heat when it enters the second branch 103b of the intermediate heat exchanger 103.

[0089] Please see Figure 4 In the fourth mode, both the first heat exchange subsystem 1a and the second heat exchange subsystem 1b are in operation.

[0090] In the first heat exchange branch 2, the first valve 201 and the second valve 202 are closed, and the third valve 203 is open. The fluid flows from the first heat exchange inlet 21a to the third sub-branch 213 in the first heat exchange branch 2, then from the third sub-branch 213 to the third branch 101a of the first evaporator 101 in the first heat exchange subsystem 1a, and finally to the third branch 101a of the first evaporator 101 in the second heat exchange subsystem 1b, to perform secondary cooling of the fluid. At this time, in the first circulation loop 11 of the first heat exchange subsystem 1a and the second heat exchange subsystem 1b, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is increased and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttling valve 104 and the pressure of the fluid is reduced in the first throttling valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0091] In the second heat exchange branch 3, the fifth valve 302 and the sixth valve 303 are closed, and the fourth valve 301 is open. The fluid flows from the second heat exchange inlet 31a into the fourth sub-branch 311 of the second heat exchange branch 3, then from the fourth sub-branch 311 to the fifth branch 105a of the second evaporator 105 in the second heat exchange subsystem 1b, and finally to the fifth branch 105a of the second evaporator 105 in the first heat exchange subsystem 1a, so as to perform secondary cooling treatment on the fluid. At this time, in the second circulation loop 12 of the first heat exchange subsystem 1a and the second heat exchange subsystem 1b, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling treatment. Then it flows to the second throttle valve 107 and the pressure of the fluid is reduced in the second throttle valve 107 so that it can effectively absorb heat when it enters the second branch 103b of the intermediate heat exchanger 103.

[0092] Therefore, the first heat pump system provided in this application operates as follows: in the first mode, the first heat exchange subsystem 1a operates alone; in the second mode, the second heat exchange subsystem 1b operates alone; in the third mode, the first heat exchange subsystem 1a and the second heat exchange subsystem 1b operate in parallel, and the total heating capacity of the system is the sum of the heating capacities of the two heat exchange subsystems 1a and 2b, and the second heat exchange outlet 31b can be connected to one or more high heat demand devices; in the fourth mode, the first heat exchange subsystem 1a and the second heat exchange subsystem 1b operate in series, and while providing a higher heating temperature, the temperature of the first heat exchange outlet 21b (usually the heat source outlet) can be further reduced for cooling or production process temperature requirements.

[0093] In the first circulation loop 11, since the first circulation loop 11 is a low-temperature refrigerant flow path, the refrigerant selected is, but not limited to, R134a or R515B. In the second circulation loop 12, since the second circulation loop 12 is a high-temperature refrigerant flow path, the refrigerant selected is, but not limited to, R1233zd.

[0094] Please see Figure 5 Taking lithium battery production as an example, the heat pump system includes a first circulation loop 11 and a second circulation loop 12. The first circulation loop 11 is used to provide heat for baking the battery electrode (90-120°C), and the second circulation loop 12 is used for dehumidifying and regenerating the rotor (120-140°C). The waste heat generated by these two circulation loops is recovered to the heat source for full utilization.

[0095] Please see Figure 6A second type of heat pump system is provided, which includes most of the technical solutions of the first type of heat pump system. The difference is that the second type of heat pump system also includes a third circulation loop 13, which is arranged adjacent to the second circulation loop 12 to realize heat exchange between the two circulation loops and meet the steam demand scenarios of different modes.

[0096] In some embodiments, the first heat pump system further includes an intermediate heat exchanger 103, which includes a first branch 103a and a second branch 103b that are independent of each other, so that the first circulation loop 11 and the second circulation loop 12 exchange heat through the intermediate heat exchanger 103.

[0097] The first circulation loop 11 includes a first evaporator 101, a first compressor 102, a first branch 103a of an intermediate heat exchanger 103, and a first throttle valve 104, all in fluid communication. The second circulation loop 12 includes a second evaporator 105, a second compressor 106, a second branch 103b of an intermediate heat exchanger 103, and a second throttle valve 107, all in fluid communication. The third circulation loop 13 includes a circulating water pump 108 and a flash tank 109, all in fluid communication.

[0098] The first evaporator 101 has a third branch 101a and a fourth branch 101b that are independent of each other. The third branch 101a is connected in series with the first heat exchange branch 2, and the fourth branch 101b is connected in series with the first circulation loop 11.

[0099] The inlet of the fourth branch 101b is connected to the outlet of the first throttle valve 104, the outlet of the fourth branch 101b is connected to the inlet of the first compressor 102, the outlet of the first compressor 102 is connected to the inlet of the first branch 103a, and the outlet of the first branch 103a is connected to the inlet of the first throttle valve 104.

[0100] The second evaporator 105 has a fifth branch 105a and a sixth branch 105b that are independent of each other. The fifth branch 105a and the second heat exchange branch 3 are connected in series to the third circulation loop 13, and the sixth branch 105b is connected in series to the second circulation loop 12.

[0101] The inlet of the fifth branch 105a is connected to the outlet of the circulating water pump 108, and the outlet of the fifth branch 105a is connected to the inlet of the flash tank 109. The first outlet of the flash tank 109 is used to discharge steam, and the second outlet of the flash tank 109 is connected to the inlet of the circulating water pump 108.

[0102] The inlet of the sixth branch 105b is connected to the outlet of the second compressor 106, the outlet of the sixth branch 105b is connected to the inlet of the second throttle valve 107, the outlet of the second throttle valve 107 is connected to the inlet of the second branch 103b, and the outlet of the second branch 103b is connected to the inlet of the second compressor 106.

[0103] There are multiple first heat exchange branches 2. Each first heat exchange branch 2 has a first heat exchange inlet 21a and a first heat exchange outlet 21b. The first heat exchange inlet 21a is connected to the inlet of at least one third branch 101a of the heat exchange subsystem 1. The first heat exchange outlet 21b is connected to the outlet of the third branch 101a connected to the first heat exchange inlet 21a.

[0104] There are multiple second heat exchange branches 3. Each second heat exchange branch 3 has a second heat exchange inlet 31a and a second heat exchange outlet 31b. The second heat exchange inlet 31a is connected to the inlet of the circulating water pump 108 of at least one heat exchange subsystem 1, and the second heat exchange outlet 31b is connected to the outlet of the flash tank 109 of the branch where the second heat exchange inlet 31a is located.

[0105] It should be noted that the structure of the first heat exchange branch 2 in the second type of heat pump system of this application is exactly the same as the structure of the first heat exchange branch 2 in the first type of heat pump system, while the structure of the second heat exchange branch 3 in the second type of heat pump system is different from that in the first type of heat pump system.

[0106] Specifically, in the second type of heat pump system, multiple second heat exchange branches 3 include a seventh sub-branch 314, an eighth sub-branch 315, and a ninth sub-branch 316. The seventh sub-branch 314 is equipped with a fifth valve 302, the eighth sub-branch 315 with a fourth valve 301, and the ninth sub-branch 316 with a sixth valve 303. Therefore, by adjusting these valves, the system can flexibly select different flow paths. For example, valves on specific sub-branches can be opened or closed as needed to adapt to different operating conditions and requirements. Furthermore, by adjusting the valves, more precise thermal management can be achieved, improving the overall system efficiency and performance.

[0107] In the same heat exchange subsystem 1, the first evaporator 101 of the first circulation loop 11 is connected to the first heat exchange branch 2, and the circulating water pump 108 of the second circulation loop 12 is connected to the second heat exchange branch 3.

[0108] The multiple heat exchange subsystems 1 include a first heat exchange subsystem 1a and multiple second heat exchange subsystems 1b. In the second heat exchange subsystem 1b, the third circulation loop 13 also includes an on / off valve 110. The inlet of the on / off valve 110 is connected to the outlet of the fifth branch 105a of the second evaporator 105, and the outlet of the on / off valve 110 is connected to the inlet of the flash tank 109.

[0109] The second type of heat pump system can have four operating modes, and each operating mode is described in detail below.

[0110] Please see Figure 6In the first mode, the first heat exchange subsystem 1a is in operation and the second heat exchange subsystem 1b is in non-operation.

[0111] In the first heat exchange branch 2, the first valve 201 and the third valve 203 are closed, and the second valve 202 is open. The fluid flows from the first heat exchange inlet 21a to the second sub-branch 212 in the first heat exchange branch 2, and then flows through the third branch 101a of the first evaporator 101 in the first heat exchange subsystem 1a to cool the fluid passing through the third branch 101a. At this time, in the first circulation loop 11 of the first heat exchange subsystem 1a, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttling valve 104 and the pressure of the fluid is reduced in the first throttling valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0112] In the second heat exchange branch 3, the fourth valve 301 and the fifth valve 302 are closed, and the sixth valve 303 is open. The fluid flows from the second heat exchange inlet 31a to the ninth sub-branch 316 in the second heat exchange branch 3, and flows through the circulating water pump 108 in the first heat exchange subsystem 1a, the fifth branch 105a of the second evaporator 105, and the flash tank 109. Finally, part of the fluid passing through the flash tank 109 is evaporated and discharged from the second heat exchange outlet 31b, and the remainder is recycled back to the circulating water pump 108. At this time, in the second circulation loop 12 of the first heat exchange subsystem 1a, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling. Then it flows to the second throttle valve 107 and the pressure of the fluid is reduced in the second throttle valve 107 so that it can effectively absorb heat when it enters the second branch 103b of the intermediate heat exchanger 103.

[0113] Please see Figure 7 In the second mode, the first heat exchange subsystem 1a is in a non-operational state, and the second heat exchange subsystem 1b is in an operating state.

[0114] In the first heat exchange branch 2, the second valve 202 and the third valve 203 are closed, and the first valve 201 is open. Fluid flows from the first heat exchange inlet 21a to the first sub-branch 211 in the first heat exchange branch 2, and then from the first sub-branch 211 to the third branch 101a of the first evaporator 101 in the second heat exchange subsystem 1b, to cool the fluid in the third branch 101a of the second heat exchange subsystem 1b. At this time, in the first circulation loop 11 of the second heat exchange subsystem 1b, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttling valve 104 and the pressure of the fluid is reduced in the first throttling valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0115] In the second heat exchange branch 3, the fourth valve 301 and the sixth valve 303 are closed, and the fifth valve 302 is open. The fluid flows from the second heat exchange inlet 31a to the seventh sub-branch 314 in the second heat exchange branch 3, and flows through the circulating water pump 108 in the second heat exchange subsystem 1b, the fifth branch 105a of the second evaporator 105, and the flash tank 109. Finally, part of the fluid passing through the flash tank 109 is evaporated and discharged from the second heat exchange outlet 31b, and the remaining part is recycled back to the circulating water pump 108. At this time, in the second circulation loop 12 of the second heat exchange subsystem 1b, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling treatment. Then it flows to the second throttle valve 107 and the pressure of the fluid is reduced in the second throttle valve 107 so that it can effectively absorb heat when it enters the second branch 103b of the intermediate heat exchanger 103.

[0116] Please see Figure 8 In the third mode, both the first heat exchange subsystem 1a and the second heat exchange subsystem 1b are in operation.

[0117] In the first heat exchange branch 2, the third valve 203 is closed, while the first valve 201 and the second valve 202 are open. When the first valve 201 is open, fluid flows from the first heat exchange inlet 21a into the first sub-branch 211 of the first heat exchange branch 2, and then from the first sub-branch 211 into the third branch 101a of the first evaporator 101 in the second heat exchange subsystem 1b, to cool the fluid passing through the third branch 101a in the second heat exchange subsystem 1b. When the second valve 202 is open, fluid flows from the first heat exchange inlet 21a into the second sub-branch 212 of the first heat exchange branch 2, and then from the second sub-branch 212 into the third branch 101a of the first evaporator 101 in the first heat exchange subsystem 1a, to cool the fluid passing through the third branch 101a in the first heat exchange subsystem 1a. At this time, in the first circulation loop 11 of the first heat exchange subsystem 1a and the second heat exchange subsystem 1b, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is raised and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttle valve 104 and the pressure of the fluid is reduced in the first throttle valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0118] In the second heat exchange branch 3, the fourth valve 301 is closed, while the fifth valve 302 and the sixth valve 303 are open. With the fifth valve 302 open, the fluid flows from the second heat exchange inlet 31a to the seventh sub-branch 314 in the second heat exchange branch 3, and then flows through the circulating water pump 108 in the second heat exchange subsystem 1b, the fifth branch 105a of the second evaporator 105, and the flash tank 109. Finally, a portion of the fluid passing through the flash tank 109 is evaporated and discharged from the second heat exchange outlet 31b, while the remainder is recycled back to the circulating water pump 108. With the sixth valve 303 open, the fluid flows from the second heat exchange inlet 31a to the ninth sub-branch 316 in the second heat exchange branch 3, and then flows through the circulating water pump 108 in the first heat exchange subsystem 1a, the fifth branch 105a of the second evaporator 105, and the flash tank 109. Finally, a portion of the fluid passing through the flash tank 109 is evaporated and discharged from the second heat exchange outlet 31b, while the remainder is recycled back to the circulating water pump 108. At this time, in the second circulation loop 12 of the first heat exchange subsystem 1a and the second heat exchange subsystem 1b, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling. Then it flows to the second throttle valve 107, where the pressure of the fluid is reduced, allowing it to effectively absorb heat when entering the second branch 103b of the intermediate heat exchanger 103.

[0119] Please see Figure 9 In the fourth mode, both the first heat exchange subsystem 1a and the second heat exchange subsystem 1b are in operation.

[0120] In the first heat exchange branch 2, the first valve 201 and the second valve 202 are closed, and the third valve 203 is open. The fluid flows from the first heat exchange inlet 21a to the third sub-branch 213 in the first heat exchange branch 2, then from the third sub-branch 213 to the third branch 101a of the first evaporator 101 in the first heat exchange subsystem 1a, and finally to the third branch 101a of the first evaporator 101 in the second heat exchange subsystem 1b, to perform secondary cooling of the fluid. At this time, in the first circulation loop 11 of the first heat exchange subsystem 1a and the second heat exchange subsystem 1b, the first compressor 102 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the first compressor 102 is increased and it flows through the first branch 103a of the intermediate heat exchanger 103 to achieve cooling. Then it flows to the first throttling valve 104 and the pressure of the fluid is reduced in the first throttling valve 104, so that it can effectively absorb heat when it enters the fourth branch 101b of the first evaporator 101.

[0121] In the second heat exchange branch 3, the sixth valve 303 and the on / off valve 110 are closed, while the fourth valve 301 and the fifth valve 302 are open. The fluid flows from the second heat exchange inlet 31a to the seventh sub-branch 314, the fifth sub-branch 105a, and the eighth sub-branch 315 in the second heat exchange branch 3, and then flows through the circulating water pump 108 in the first heat exchange subsystem 1a, the fifth sub-branch 105a of the second evaporator 105, and the flash tank 109. Finally, a portion of the fluid passing through the flash tank 109 is evaporated and discharged from the second heat exchange outlet 31b, while the remaining portion is recycled back to the circulating water pump 108. At this time, in the second circulation loop 12 of the first heat exchange subsystem 1a and the second heat exchange subsystem 1b, the second compressor 106 increases the pressure and temperature of the fluid by compressing it. The temperature of the fluid flowing out of the second compressor 106 is raised and it flows through the sixth branch 105b of the second evaporator 105 to achieve cooling treatment. Then it flows to the second throttle valve 107 and the pressure of the fluid is reduced in the second throttle valve 107 so that it can effectively absorb heat when it enters the second branch 103b of the intermediate heat exchanger 103.

[0122] Therefore, the second heat pump system provided in this application operates as follows: in the first mode, the first heat exchange subsystem 1a operates alone; in the second mode, the second heat exchange subsystem 1b operates alone; in the third mode, the first heat exchange subsystem 1a and the second heat exchange subsystem 1b operate in parallel, and the total heating capacity of the system is the sum of the heating capacities of the two heat exchange subsystems 1a and 2b, and the second heat exchange outlet 31b can be connected to one or more high heat demand devices; in the fourth mode, the first heat exchange subsystem 1a and the second heat exchange subsystem 1b operate in series, and while providing a higher heating temperature, the temperature of the first heat exchange outlet 21b (usually the heat source outlet) can be further reduced for cooling or production process temperature requirements.

[0123] The heat pump system provided in this application includes three or more heat exchange subsystems 1, which may operate individually; or, operate in series; or operate in parallel; or, among the three or more heat exchange subsystems 1, some operate individually and others operate in series; or, among the three or more heat exchange subsystems 1, some operate individually and others operate in series; or, among the three or more heat exchange subsystems 1, some operate in series and others operate in parallel; or, among the three or more heat exchange subsystems 1, some operate individually, some operate in series, and others operate in parallel. Therefore, by controlling the operation of multiple heat exchange subsystems 1 through the first heat exchange branch 2 and the second heat exchange branch 3, the system can address situations where multiple heat demands exist simultaneously, thereby improving the overall system efficiency.

[0124] Compared to traditional heat pump systems, the heat pump system provided in this application has a high energy efficiency ratio and a large temperature rise, which can meet high-temperature requirements above 120°C. Through a modular architecture and combined with different operating modes, it can simultaneously meet the different heating needs of multiple devices under various operating conditions.

[0125] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0126] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0127] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0128] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heat pump system, characterized in that, include: Multiple heat exchange subsystems, a first heat exchange branch, and a second heat exchange branch. Each heat exchange subsystem includes a first circulation loop and a second circulation loop arranged adjacent to each other. The first heat exchange branch is selectively connected to the first circulation loop of at least one heat exchange subsystem, and the second heat exchange branch is selectively connected to the second circulation loop of the same heat exchange subsystem.

2. The heat pump system according to claim 1, characterized in that, Also includes: An intermediate heat exchanger, which includes a first branch and a second branch that are independent of each other; The first circulation loop includes a first evaporator, a first compressor, a first branch, and a first throttle valve, all in fluid communication. The second circulation loop includes a second evaporator, a second compressor, a second branch, and a second throttle valve, all in fluid communication. The first evaporator has a third branch and a fourth branch that are independent of each other. The third branch is connected in series with the first heat exchange branch, and the fourth branch is connected in series with the first circulation loop. The second evaporator has a fifth branch and a sixth branch that are independent of each other. The fifth branch is connected in series with the second heat exchange branch, and the sixth branch is connected in series with the second circulation loop.

3. The heat pump system according to claim 2, characterized in that, The inlet of the fourth branch is connected to the outlet of the first throttle valve, the outlet of the fourth branch is connected to the inlet of the first compressor, the outlet of the first compressor is connected to the inlet of the first branch, and the outlet of the first branch is connected to the inlet of the first throttle valve. The inlet of the sixth branch is connected to the outlet of the second compressor, the outlet of the sixth branch is connected to the inlet of the second throttle valve, the outlet of the second throttle valve is connected to the inlet of the second branch, and the outlet of the second branch is connected to the inlet of the second compressor.

4. The heat pump system according to claim 2, characterized in that, The number of the first heat exchange branches is multiple, and each first heat exchange branch has a first heat exchange inlet and a first heat exchange outlet. The first heat exchange inlet is connected to the inlet of at least one third branch of the heat exchange subsystem, and the first heat exchange outlet is connected to the outlet of the third branch connected to the first heat exchange inlet. The number of second heat exchange branches is multiple, and each first heat exchange branch has a second heat exchange inlet and a second heat exchange outlet. The second heat exchange inlet is connected to the inlet of at least one fifth branch of the heat exchange subsystem, and the second heat exchange outlet is connected to the outlet of the fifth branch connected to the second heat exchange inlet. In the same heat exchange subsystem, the first evaporator of the first circulation loop is connected to the first heat exchange branch, and the second evaporator of the second circulation loop is connected to the second heat exchange branch.

5. The heat pump system according to claim 4, characterized in that, The number of the first heat exchange branch is the same as the number of the second heat exchange branch.

6. The heat pump system according to claim 1, characterized in that, One of the first circulation loop and the second circulation loop is a low-temperature circulation loop, and the other is a high-temperature circulation loop.

7. The heat pump system according to claim 1, characterized in that, Also includes: The third circulation loop is arranged adjacent to the second circulation loop, and the third circulation loop includes a circulating water pump and a flash tank in fluid communication. An intermediate heat exchanger, which includes a first branch and a second branch that are independent of each other; The first circulation loop includes a first evaporator, a first compressor, a first branch, and a first throttle valve that are in fluid communication. The first evaporator has a third branch and a fourth branch that are independent of each other. The third branch is connected in series with the first heat exchange branch, and the fourth branch is connected in series with the first circulation loop. The second circulation loop includes a second evaporator, a second compressor, a second branch, and a second throttle valve that are in fluid communication. The second evaporator has a fifth branch and a sixth branch that are independent of each other. The fifth branch and the second heat exchange branch are respectively connected in series to the third circulation loop, and the sixth branch is connected in series to the second circulation loop.

8. The heat pump system according to claim 7, characterized in that, The inlet of the fourth branch is connected to the outlet of the first throttle valve, the outlet of the fourth branch is connected to the inlet of the first compressor, the outlet of the first compressor is connected to the inlet of the first branch, and the outlet of the first branch is connected to the inlet of the first throttle valve. The inlet of the fifth branch is connected to the outlet of the circulating water pump, the outlet of the fifth branch is connected to the inlet of the flash tank, the first outlet of the flash tank is used to discharge steam, and the second outlet of the flash tank is connected to the inlet of the circulating water pump. The inlet of the sixth branch is connected to the outlet of the second compressor, the outlet of the sixth branch is connected to the inlet of the second throttle valve, the outlet of the second throttle valve is connected to the inlet of the second branch, and the outlet of the second branch is connected to the inlet of the second compressor.

9. The heat pump system according to claim 8, characterized in that, The number of the first heat exchange branches is multiple, and each first heat exchange branch has a first heat exchange inlet and a first heat exchange outlet. The first heat exchange inlet is connected to the inlet of at least one third branch of the heat exchange subsystem, and the first heat exchange outlet is connected to the outlet of the third branch connected to the first heat exchange inlet. The number of the second heat exchange branches is multiple, and each second heat exchange branch has a second heat exchange inlet and a second heat exchange outlet. The second heat exchange inlet is connected to the inlet of the circulating water pump of at least one of the heat exchange subsystems, and the second heat exchange outlet is connected to the outlet of the flash tank of the branch where the second heat exchange inlet is located. In the same heat exchange subsystem, the first evaporator of the first circulation loop is connected to the first heat exchange branch, and the circulating water pump of the second circulation loop is connected to the second heat exchange branch.

10. The heat pump system according to claim 9, characterized in that, Each of the first heat exchange branch and each of the second heat exchange branches is equipped with a valve, and the heat exchange subsystem is selectively connected by closing the valve.

11. The heat pump system according to any one of claims 7-10, characterized in that, The multiple heat exchange subsystems include a first heat exchange subsystem and multiple second heat exchange subsystems. In the second heat exchange subsystem, the third circulation loop further includes an on / off valve, the inlet of which is connected to the outlet of the fifth branch of the second evaporator, and the outlet of which is connected to the inlet of the flash tank.

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