Heat pump system and control method

Abstract

The invention provides a heat pump system and a control method. The heat pump system comprises a first heat exchange module, a second heat exchange module and a control module, the photovoltaic module is used for photovoltaic power generation; the circulating module is connected with the first heat exchange module; a refrigerant and a functional component are arranged in the circulating module; the second heat exchange module is connected with the circulation module; and the control module controls the first heat exchange module, the functional assembly and the second heat exchange module to exchange heat according to environmental parameters and parameters of the heat pump system, and the technical problem that the temperature of the system is not uniform when the photovoltaic assembly works is solved.

Description

Technical Field

[0001] The present invention relates to the field of solar energy technology, and in particular to a heat pump system and a control method. Background Art

[0002] Photovoltaic thermal modules or systems can utilize both photovoltaic and thermal solar energy. The power generation of crystalline silicon photovoltaic modules will decrease as their temperature rises. In addition, high temperature will also affect the life of photovoltaic cells. Photovoltaic thermal modules can take away and utilize waste heat while generating photovoltaic power. The basic principle of photovoltaic thermal heat pump system is to use the heat generated in the photovoltaic power generation process to improve the energy efficiency of the heat pump system or achieve energy saving and carbon reduction.

[0003] The current photovoltaic thermal modules are roughly divided into two categories according to the structure or the type of circulating medium: one is that the refrigerant flows directly through the photovoltaic thermal module and takes away the heat, which includes common structures such as direct expansion type and tube-sheet type; the other is that the coolant flows through the photovoltaic thermal module and takes away the heat to a heat exchanger, and the other side of the heat exchanger is connected to the refrigerant circulation module 3. The latter has the advantages of stable and reliable system structure and low cost.

[0004] However, due to the large number of components that generate and store heat in photovoltaic thermal modules, uneven temperature distribution of each component may occur, thus wasting energy. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a heat pump system and a control method to solve the technical problem in the related art that the photovoltaic components cause uneven system temperature when working.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a heat pump system is provided, comprising: A first heat exchange module, wherein a photovoltaic module is disposed on the first heat exchange module; the photovoltaic module is used to absorb solar energy; A circulation module, the circulation module is connected to the first heat exchange module; the circulation module is provided with a refrigerant and functional components; A second heat exchange module connected to the circulation module; A control module controls the first heat exchange module, the functional component and the second heat exchange module to exchange heat according to environmental parameters and parameters of the heat pump system.

[0007] Furthermore, the first heat exchange module comprises: A first heat storage component, wherein a first heat exchange medium is arranged in the first heat storage component; The first heat exchange pipeline is connected to the first heat storage component, and the first heat exchange pipeline is connected to the photovoltaic module; the first heat exchange pipeline is provided with a first regulating pump for regulating the flow rate of the working medium in the first heat exchange pipeline.

[0008] Furthermore, the first heat exchange module includes a first supplementary pipeline, and the first supplementary pipeline is connected to the first heat storage component to pass the first heat exchange medium into the first heat storage component.

[0009] Furthermore, the second heat exchange module comprises: a second heat storage component, wherein a second heat exchange medium is arranged in the second heat storage component; A second supplementary pipeline is connected to the second heat storage component to introduce the second heat exchange medium into the second heat storage component.

[0010] Furthermore, the circulation module comprises: a second heat exchange pipeline, the second heat exchange pipeline is connected to the first heat exchange module, and the second heat exchange pipeline is connected to the second heat exchange module; A control valve, wherein the control valve is used to control the flow direction of the working medium in the second heat exchange pipeline.

[0011] Furthermore, the circulation module comprises: A compressor, arranged on the second heat exchange pipeline; an evaporator, connected to the second heat exchange pipeline; A condenser is connected to the second heat exchange pipeline.

[0012] Furthermore, the second heat exchange pipeline comprises: A heating pipeline, one end of which is connected to the first heat exchange module; the other end of which is connected to the second heat exchange module; and the compressor is arranged on the heating pipeline; A reflux pipeline, one end of which is connected to the first heat exchange module, and the other end of which is connected to the second heat exchange module.

[0013] Furthermore, the control valve comprises: a first control valve, the first control valve being arranged on the heating pipeline, and the first control valve being located upstream of the compressor; a second control valve, the second control valve being arranged on the return line; Wherein, the inlet of the evaporator is communicated with the second control valve; and the outlet of the evaporator is communicated with the first control valve.

[0014] Furthermore, the control valve includes a third control valve, which is arranged on the heating pipeline and located downstream of the compressor; the inlet of the condenser is connected to the third control valve, and the outlet of the condenser is connected to the reflux pipeline.

[0015] Furthermore, the circulation module comprises: A heat exchange branch, one end of which is connected to the first control valve, and the other end of which is connected to the third control valve; a second regulating pump is provided on the heat exchange branch; and / or, The throttling component is arranged on the return pipeline.

[0016] Further, The environmental parameters include temperature, irradiance and wind speed of the environment; and / or, The system parameters include the working fluid flow rate and working fluid temperature in the heat pump system; and / or, The control module includes a first temperature sensor disposed on the first heat exchange module and a second temperature sensor disposed on the second heat exchange module.

[0017] The control method of this embodiment is applicable to the above-mentioned heat pump system, and the control method includes: Determine whether the photovoltaic module is generating electricity; If yes, the flow rate of the working fluid in the heat pump system is controlled according to the radiation of the environment, the power generation of the environment and the temperature of the working fluid in the first heat exchange module; If not, the flow rate of the working medium in the heat pump system is controlled according to the temperature of the second heat exchange module.

[0018] Furthermore, according to the radiation degree of the environment, the power generation amount of the environment and the temperature of the working fluid in the first heat exchange module, the method for controlling the state of the working fluid in the heat pump system includes: Record the irradiance d1 and the power generation d2 of the photovoltaic module; when |d1|>|d2|, increase the flow rate of the working fluid in the heat pump system.

[0019] Furthermore, according to the temperature of the second heat exchange module, the method for controlling the state of the working medium in the heat pump system includes: The refrigerant in the circulation module starts to work; Determining whether the temperature of the working fluid of the first heat exchange module is greater than the temperature of the working fluid of the second heat exchange module; If so, the refrigerant does not pass through the compressor of the functional component.

[0020] Furthermore, the method for starting the refrigerant in the circulation module to work includes: Recording the actual temperature t1 of the working fluid of the second heat exchange module and the set temperature t0 of the working fluid of the second heat exchange module; When t1 is less than t0, the functional components of the circulation module are turned on at the first power; When t1 is greater than or equal to t0, the functional components of the circulation module are turned on at a second power; wherein the first power is greater than the second power.

[0021] Furthermore, the control method further includes: Determining whether the temperature of the working fluid of the first heat exchange module is lower than the ambient temperature; If so, utilizing the functional components of the circulation module to generate heat and exchange heat with the second heat exchange module; If not, the first heat exchange module and the second heat exchange module are used to exchange heat.

[0022] Beneficial effects: In the heat pump system of the present invention, when the photovoltaic module generates electricity, the absorbed solar heat energy takes away the heat through the working fluid circulation loop and stores it in the low-grade heat storage component (first heat exchange module), which further serves as one of the evaporators of the refrigerant circulation module. The heat absorbed by the refrigerant will enter the high-grade heat storage component (second heat exchange module) through compression heating, and the high-grade heat storage component produces hot water required by the user. The use of two high and low temperature heat storage components can achieve three effects: on the one hand, it takes into account the working temperature of the photovoltaic module, simplifies the control system, and improves reliability; on the other hand, it reduces the heat loss of the low-grade heat storage component, which helps to improve the energy efficiency of the system; thirdly, it improves the flexibility and function of the high-grade heat storage component, so that it is not affected or less affected by the low-grade heat storage component, and solves the technical problem of uneven system temperature when the photovoltaic module is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a heat pump system used in an embodiment of the present invention; Figure 2 is a schematic diagram of a heat exchange pipeline of a heat pump system used in an embodiment of the present invention; Figure 3 It is a flow chart of the control method adopted in the embodiment of the present invention.

[0024] The above drawings include the following reference numerals: 1. First heat exchange module; 12. First heat storage component; 13. First heat exchange pipeline; 14. First regulating pump; 15. First supplementary pipeline; 2. Photovoltaic module; 3. Circulation module; 31. Second heat exchange pipeline; 311. Heating pipeline; 312. Return pipeline; 313. Heat exchange branch; 32. Throttling component; 33. Second regulating pump; 4. Functional component; 41. Compressor; 42. Evaporator; 43. Condenser; 5. Second heat exchange module; 51. Second heat storage component; 52. Second supplementary pipeline; 61. First control valve; 62. Second control valve; 63. Third control valve; 71. First temperature sensor; 72. Second temperature sensor. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] See also Figures 1 to 3 According to an embodiment of the present invention, a heat pump system is provided, comprising: a first heat exchange module 1, on which a photovoltaic component 2 is arranged; the photovoltaic component 2 is used for photovoltaic power generation; a circulation module 3, which is connected to the first heat exchange module 1; a refrigerant and a functional component 4 are arranged in the circulation module 3; a second heat exchange module 5, which is connected to the circulation module 3; and a control module, which controls the first heat exchange module 1, the functional component 4 and the second heat exchange module 5 to exchange heat according to environmental parameters and parameters of the heat pump system.

[0027] With the above arrangement, when the photovoltaic module generates electricity, the absorbed solar heat energy takes away the heat through the working fluid circulation loop and stores it in the low-grade heat storage component (first heat exchange module 1), which further serves as one of the evaporators of the refrigerant circulation module 3. The heat absorbed by the refrigerant will enter the high-grade heat storage component (second heat exchange module 5) through compression heating, and the high-grade heat storage component produces hot water required by the user. The use of high and low temperature heat storage components can achieve three effects: on the one hand, it takes care of the working temperature of the photovoltaic module, simplifies the control system, and improves reliability; on the other hand, it reduces the heat loss of the low-grade heat storage component, which helps to improve the energy efficiency of the system; thirdly, it improves the flexibility and function of the high-grade heat storage component, so that it is not affected or less affected by the low-grade heat storage component, and solves the technical problem of uneven system temperature when the photovoltaic module is working.

[0028] In the heat pump system of this embodiment, see Figures 1 to 3 The first heat exchange module 1 includes: a first heat storage component 12, in which a first heat exchange medium is arranged; a first heat exchange pipeline 13, which is connected to the first heat storage component 12, and the first heat exchange pipeline 13 is connected to the photovoltaic component 2; the first heat exchange pipeline 13 is provided with a first regulating pump 14 for regulating the flow rate of the medium in the first heat exchange pipeline 13.

[0029] In this way, by controlling the first regulating pump 14, the flow rate of the working medium in the first heat exchange pipeline 13 is adjusted, thereby controlling the heat exchange rate between the photovoltaic assembly 2 and the first heat storage component 12 to adjust the temperature uniformity of the system.

[0030] See also Figures 1 to 3 In the heat pump system of this embodiment, the first heat exchange module 1 includes a first supplementary pipeline 15, and the first supplementary pipeline 15 is connected to the first heat storage component 12 to pass the first heat exchange medium into the first heat storage component 12.

[0031] With the above arrangement, the first heat exchange medium is introduced into the first heat storage component 12 to reduce its temperature level.

[0032] See also Figures 1 to 3 In the heat pump system of this embodiment, the second heat exchange module 5 includes: a second heat storage component 51, in which the second heat storage component 51 is provided with a second heat exchange medium; a second supplementary pipeline 52, which is connected to the second heat storage component 51 to pass the second heat exchange medium into the second heat storage component 51.

[0033] With the above arrangement, the first heat exchange medium is introduced into the second heat storage component 51 to reduce its temperature level.

[0034] In the heat pump system of this embodiment, see Figures 1 to 3 The circulation module 3 includes: a second heat exchange pipeline 31, the second heat exchange pipeline 31 is connected to the first heat exchange module 1, and the second heat exchange pipeline 31 is connected to the second heat exchange module 5; a control valve, the control valve is used to control the flow direction of the working medium in the second heat exchange pipeline 31.

[0035] With the above arrangement, a control valve is provided to control the flow direction of the working medium in the second heat exchange pipeline 31, so as to perform heat exchange on different parts, thereby adjusting the temperature uniformity of various parts of the system.

[0036] See also Figures 1 to 3In the heat pump system of this embodiment, the circulation module 3 includes: a compressor 41, which is arranged on the second heat exchange pipeline 31; an evaporator 42, which is connected to the second heat exchange pipeline 31; and a condenser 43, which is connected to the second heat exchange pipeline 31.

[0037] With the above arrangement, the heat pump system includes photovoltaic (solar thermal) components, two sets of heat storage components based on liquid media of different grades (different operating temperatures), as well as refrigerant circulation components and compressor bypass components, which enrich the flow path of the working fluid.

[0038] In the heat pump system of this embodiment, see Figures 1 to 3 The second heat exchange pipeline 31 includes: a heat supply pipeline 311, one end of which is connected to the first heat exchange module 1; the other end of the heat supply pipeline 311 is connected to the second heat exchange module 5; the compressor 41 is arranged on the heat supply pipeline 311; a return pipeline 312, one end of which is connected to the first heat exchange module 1, and the other end of the return pipeline 312 is connected to the second heat exchange module 5.

[0039] The above arrangement ensures that the working fluid can exchange heat among the three modules.

[0040] See also Figures 1 to 3 In the heat pump system of this embodiment, the control valve includes: a first control valve 61, which is arranged on the heating pipeline 311 and is located upstream of the compressor 41; a second control valve 62, which is arranged on the return pipeline 312; wherein the inlet of the evaporator 42 is connected to the second control valve 62; and the outlet of the evaporator 42 is connected to the first control valve 61.

[0041] With the above arrangement, whether the evaporator 42 participates in heat exchange can be controlled by controlling the valve, thereby meeting the requirements of different working conditions.

[0042] In the heat pump system of this embodiment, see Figures 1 to 3 The control valve includes a third control valve 63, which is arranged on the heating pipeline 311 and is located downstream of the compressor 41; the inlet of the condenser 43 is connected to the third control valve 63, and the outlet of the condenser 43 is connected to the reflux pipeline 312.

[0043] By adopting the above arrangement, whether the condenser 43 participates in heat exchange can be controlled by controlling the valve, thereby meeting the requirements of different working conditions.

[0044] In the heat pump system of this embodiment, see Figures 1 to 3The circulation module 3 includes: a heat exchange branch 313, one end of which is connected to the first control valve 61, and the other end of which is connected to the third control valve 63; a second regulating pump 33 is arranged on the heat exchange branch 313; and / or a throttling component 32 is arranged on the return pipe 312.

[0045] With the above arrangement, whether the compressor 41 participates in heat exchange can be controlled by controlling the valve, thereby meeting the requirements of different working conditions.

[0046] In the heat pump system of this embodiment, see Figures 1 to 3 , the environmental parameters include the temperature, radiance and wind speed of the environment; and / or, the system parameters include the working fluid flow and working fluid temperature in the heat pump system; and / or, the control module includes a first temperature sensor 71 arranged on the first heat exchange module 1 and a second temperature sensor 72 arranged on the second heat exchange module 5.

[0047] With the above settings, the control module can adjust the working conditions of the compressor 41, pump and valve according to the current environmental parameters (temperature, irradiance, wind speed, etc.) and system parameters (working fluid flow, temperature, etc.) with the goal of maximizing system energy efficiency.

[0048] The control method of this embodiment is applicable to the above-mentioned heat pump system, and the control method includes: determining whether the photovoltaic component 2 generates electricity; if so, controlling the flow rate of the working fluid in the heat pump system according to the radiation of the environment, the power generation of the environment and the temperature of the working fluid in the first heat exchange module 1; if not, controlling the flow rate of the working fluid in the heat pump system according to the temperature of the second heat exchange module 5.

[0049] With the above arrangement, when the photovoltaic module generates electricity, the absorbed solar heat energy takes away the heat through the working fluid circulation loop and stores it in the low-grade heat storage component (first heat exchange module 1), which further serves as one of the evaporators of the refrigerant circulation module 3. The heat absorbed by the refrigerant will enter the high-grade heat storage component (second heat exchange module 5) through compression heating, and the high-grade heat storage component produces hot water required by the user. The use of high and low temperature heat storage components can achieve three effects: on the one hand, it takes care of the working temperature of the photovoltaic module, simplifies the control system, and improves reliability; on the other hand, it reduces the heat loss of the low-grade heat storage component, which helps to improve the energy efficiency of the system; thirdly, it improves the flexibility and function of the high-grade heat storage component, so that it is not affected or less affected by the low-grade heat storage component, and solves the technical problem of uneven system temperature when the photovoltaic module is working.

[0050] In the control method of this embodiment, see Figure 3, according to the radiation of the environment, the power generation of the environment and the temperature of the working fluid in the first heat exchange module 1, the method for controlling the state of the working fluid in the heat pump system includes: recording the irradiance d1 and the power generation d2 of the photovoltaic component 2; when |d1|>|d2|, increasing the flow rate of the working fluid in the heat pump system.

[0051] With the above configuration, when |d1|>|d2|, it indicates that the heat absorbed by the photovoltaic module 2 is sufficient, and increasing the flow rate of the working fluid in the heat pump system can increase the efficiency of heat utilization.

[0052] In the control method of this embodiment, see Figure 3 , according to the temperature of the second heat exchange module 5, the method for controlling the state of the working fluid in the heat pump system includes: the refrigerant in the circulation module 3 starts working; it is determined whether the temperature of the working fluid in the first heat exchange module 1 is greater than the temperature of the working fluid in the second heat exchange module 5; if so, the refrigerant does not pass through the compressor 41 of the functional component 4.

[0053] With the above arrangement, if the temperature of the working medium in the first heat exchange module 1 is greater than the temperature of the working medium in the second heat exchange module 5, the first heat exchange module 1 will be used for heat exchange first, thereby improving the heat utilization efficiency.

[0054] In the control method of this embodiment, see Figure 3 The method for starting the refrigerant in the circulation module 3 to work includes: recording the actual temperature t1 of the working medium of the second heat exchange module 5 and the set temperature t0 of the working medium of the second heat exchange module 5; when t1 is less than t0, the functional component 4 of the circulation module 3 is turned on with a first power; when t1 is greater than or equal to t0, the functional component 4 of the circulation module 3 is turned on with a second power; wherein the first power is greater than the second power.

[0055] With the above setting, when t1 is less than t0, it means that the second heat exchange module 5 needs to be heated quickly. When the refrigerant system starts working, it should be started at maximum power in order to shorten the startup time. When t1 is greater than or equal to t0, it means that the heating required for the second heat exchange module 5 is not urgent. The refrigerant system starts working to maintain the heating effect with appropriate system power.

[0056] In the control method of this embodiment, see Figure 3 The control method also includes: determining whether the temperature of the working medium of the first heat exchange module 1 is lower than the ambient temperature; if so, utilizing the functional component 4 of the circulation module 3 to generate heat and exchange heat with the second heat exchange module 5; if not, utilizing the first heat exchange module 1 to exchange heat with the second heat exchange module 5.

[0057] With the above configuration, if the temperature of the working fluid of the first heat exchange module 1 is lower than the ambient temperature, it means that the heat stored in the working fluid of the first heat exchange module 1 is relatively low, and a higher heat exchange efficiency can be obtained by heating the functional component 4 of the circulation module 3. If the temperature of the working fluid of the first heat exchange module 1 is greater than or equal to the ambient temperature, it means that the heat stored in the working fluid of the first heat exchange module 1 is relatively high, and a higher heat exchange efficiency can be obtained by exchanging heat between the first heat exchange module 1 and the second heat exchange module 5.

[0058] The basic structure of the solution described in this embodiment is as follows Figure 1 As shown. The photovoltaic module 2 absorbs solar heat during operation, and the waste heat of the module is desorbed and stored in the first heat storage component 12 through the circulation of the first heat exchange medium, and the process is driven by the first regulating pump 14. The photovoltaic heat exchange medium can be a liquid medium with antifreeze as the main component, such as a mixture of deionized water and ethylene glycol. The first heat exchange medium can use a solution of the same or different medium as the photovoltaic heat exchange medium according to actual conditions. As the photovoltaic heat exchange medium continuously stores waste heat in the first heat storage component 12, its temperature will gradually become consistent with the working temperature of the photovoltaic module 2. Considering the influence of environmental heat dissipation, in the optimal state, the temperature value should not exceed the ambient temperature (for example, below 10 degrees), otherwise it may cause the first heat storage component 12 to dissipate a large amount of heat to the environment, thereby affecting the energy efficiency of the system, but in the extreme case (large heat generation and low heat consumption), the temperature of the first heat storage component 12 and the photovoltaic module 2 is allowed to reach a higher temperature at the same time, and the first heat exchange medium can also be added to the box to reduce its temperature level. Under normal circumstances, the low temperature difference design between the first heat storage component 12 and the environment is also conducive to simplifying the structural design of the photovoltaic thermal component. The control system will timely adjust the working state of the first regulating pump 14 according to the ambient temperature, photovoltaic power generation, the temperature of the first heat exchange medium, etc. Although the temperature measurement point can be designed on the photovoltaic component 2 to directly adjust the speed of the first regulating pump 14 according to the temperature change, the temperature non-uniformity may be more significant due to the large photovoltaic irradiation area, and the actual temperature of the component cannot be accurately obtained. In addition, the extensive use of temperature sensors will also lead to rising costs.

[0059] The control method of this embodiment is described as follows: The present application proposes a simple determination method: the control system continuously compares the change rate of the irradiance and the power generation of the components between the current moment and the previous moment. When the change in irradiance is higher than the change in power generation (when the irradiance increase value is higher than the power generation increase value), it can be determined that the component temperature has risen significantly and should be cooled in time to increase the speed of the first regulating pump 14. In other cases, the speed of the first regulating pump 14 can be maintained unchanged.

[0060] When the photovoltaic module 2 is not generating electricity (for example, at night), although the solar thermal energy during the day is stored in the first heat storage component 12, whether the refrigerant circulation module 3 at the rear end draws heat from the first heat storage component 12 is determined according to the energy consumption of the rear end. The second heat storage component 51 is a high-quality hot water tank for end users. Considering the user experience, the time from the start of the system to the output of hot water at the user-specified temperature should be shortened as much as possible, and ideally, the purpose of instant heating should be achieved. To this end, at least the actual temperature and actual flow of the second heat storage component 51 box should be detected, and the working process of the refrigerant system should be adjusted according to the set water outlet temperature. When the actual temperature of the second heat storage component 51 box is lower than the set water outlet temperature, the refrigerant system will start working at maximum power. At this time, if the temperature of the first heat storage component 12 is not lower than the ambient temperature, the refrigerant will flow through the first heat storage component 12 at the maximum flow rate through the action of the first, second and third control valves, and enter the second heat storage component 51 box after passing through the compressor to release heat, so as to increase the water outlet temperature as soon as possible. If the temperature of the first heat storage component 12 is lower than the ambient temperature, the refrigerant must flow through the evaporator 42 at the maximum flow rate, absorb heat energy from the air and enter the second heat storage component 51 box to release heat. In actual design, considering that the heat exchange efficiency between the refrigerant and the liquid medium is higher than the corresponding value between the refrigerant and the air, there may be a situation where the temperature of the first heat storage component 12 is slightly lower than the ambient temperature, but all or most of the refrigerant still flows through the first heat storage component 12 instead of the evaporator 42. When the actual temperature of the second heat storage component 51 box reaches the set water outlet temperature, the refrigerant system begins to maintain the heating effect at an appropriate power. In some cases, such as when the total heat consumption is very small, or when the operating temperature of the components is high during the day (the temperature of the first heat storage component 12 is high), or when working under hot and humid conditions (the second heat storage component 51 is set to have a low water outlet temperature), there may be a situation where the temperature of the first heat storage component 12 is higher than the temperature of the second heat storage component 51 box. At this time, the first, second and third control valves can be operated to make the refrigerant flow through the second regulating pump 33 (bypass compressor) at the maximum flow rate, reduce system power consumption, and directly exchange heat between high and low temperature heat sources.

[0061] In actual installation, the capacity of the first heat storage component 12 should be increased as much as possible according to the scale of the photovoltaic thermal assembly so that the light and heat energy absorbed by the photovoltaic assembly 2 can be collected as much as possible, while reducing the temperature difference between the first heat storage component 12 and the environment. The second heat storage component 51 can be set in the user's home, and its capacity is designed to match the household hot water consumption.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0063] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0064] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0065] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0066] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A heat pump system, characterized in that: include: A first heat exchange module (1), wherein a photovoltaic module (2) is arranged on the first heat exchange module (1); the photovoltaic module (2) is used to absorb solar energy; A circulation module (3), the circulation module (3) being connected to the first heat exchange module (1); a refrigerant and a functional component (4) are arranged in the circulation module (3); A second heat exchange module (5) connected to the circulation module (3); A control module, wherein the control module controls the first heat exchange module (1), the functional component (4) and the second heat exchange module (5) to exchange heat according to environmental parameters and parameters of the heat pump system.

2. The heat pump system according to claim 1, characterized in that: The first heat exchange module (1) comprises: A first heat storage component (12), wherein a first heat exchange medium is arranged in the first heat storage component (12); A first heat exchange pipeline (13), the first heat exchange pipeline (13) being connected to the first heat storage component (12), the first heat exchange pipeline (13) being connected to the photovoltaic module (2); the first heat exchange pipeline (13) being provided with a first regulating pump (14) for regulating the flow rate of the working medium in the first heat exchange pipeline (13).

3. The heat pump system according to claim 2, characterized in that: The first heat exchange module (1) comprises a first supplementary pipeline (15), wherein the first supplementary pipeline (15) is connected to the first heat storage component (12) so as to pass the first heat exchange medium into the first heat storage component (12).

4. The heat pump system according to claim 1, characterized in that: The second heat exchange module (5) comprises: A second heat storage component (51), wherein a second heat exchange medium is arranged in the second heat storage component (51); A second supplementary pipeline (52), wherein the second supplementary pipeline (52) is connected to the second heat storage component (51) so as to pass the second heat exchange medium into the second heat storage component (51).

5. The heat pump system according to claim 1, characterized in that: The circulation module (3) comprises: a second heat exchange pipeline (31), the second heat exchange pipeline (31) being connected to the first heat exchange module (1), and the second heat exchange pipeline (31) being connected to the second heat exchange module (5); A control valve, wherein the control valve is used to control the flow direction of the working medium in the second heat exchange pipeline (31).

6. The heat pump system according to claim 5, characterized in that: The circulation module (3) comprises: A compressor (41), arranged on the second heat exchange pipeline (31); an evaporator (42) connected to the second heat exchange pipeline (31); The condenser (43) is in communication with the second heat exchange pipeline (31).

7. The heat pump system according to claim 6, characterized in that: The second heat exchange pipeline (31) comprises: a heating pipeline (311), one end of the heating pipeline (311) being connected to the first heat exchange module (1); the other end of the heating pipeline (311) being connected to the second heat exchange module (5); the compressor (41) being arranged on the heating pipeline (311); A return pipeline (312), one end of the return pipeline (312) being connected to the first heat exchange module (1), and the other end of the return pipeline (312) being connected to the second heat exchange module (5).

8. The heat pump system according to claim 7, characterized in that: The control valve comprises: a first control valve (61), the first control valve (61) being arranged on the heating pipeline (311), the first control valve (61) being located upstream of the compressor (41); a second control valve (62), the second control valve (62) being arranged on the return line (312); The inlet of the evaporator (42) is in communication with the second control valve (62); and the outlet of the evaporator (42) is in communication with the first control valve (61).

9. The heat pump system according to claim 7, characterized in that: The control valve comprises a third control valve (63), the third control valve (63) being arranged on the heating pipeline (311), and the third control valve (63) being located downstream of the compressor (41); the inlet of the condenser (43) is in communication with the third control valve (63), and the outlet of the condenser (43) is in communication with the return pipeline (312).

10. The heat pump system according to claim 9, characterized in that: The circulation module (3) comprises: a heat exchange branch (313), one end of the heat exchange branch (313) being connected to the first control valve (61), and the other end of the heat exchange branch (313) being connected to the third control valve (63); a second regulating pump (33) being provided on the heat exchange branch (313); and / or, A throttling component (32) is arranged on the return pipeline (312).

11. The heat pump system according to claim 1, characterized in that: The environmental parameters include temperature, irradiance and wind speed of the environment; and / or, The system parameters include the working fluid flow rate and working fluid temperature in the heat pump system; and / or, The control module comprises a first temperature sensor (71) arranged on the first heat exchange module (1) and a second temperature sensor (72) arranged on the second heat exchange module (5).

12. A control method, applicable to the heat pump system according to any one of claims 1 to 11, characterized in that: The control method comprises: Determining whether the photovoltaic module (2) is generating electricity; If yes, controlling the flow rate of the working fluid in the heat pump system according to the radiation of the environment, the power generation of the environment and the temperature of the working fluid in the first heat exchange module (1); If not, the flow rate of the working medium in the heat pump system is controlled according to the temperature of the second heat exchange module (5).

13. The control method according to claim 12, characterized in that: The method for controlling the state of the working fluid in the heat pump system according to the ambient radiation, the ambient power generation and the temperature of the working fluid in the first heat exchange module (1) comprises: Recording the irradiance d1 and the power generation d2 of the photovoltaic module (2); and when |d1|>|d2|, increasing the flow rate of the working fluid in the heat pump system.

14. The control method according to claim 12, characterized in that: The method for controlling the state of the working medium in the heat pump system according to the temperature of the second heat exchange module (5) comprises: The refrigerant in the circulation module (3) starts to work; Determining whether the temperature of the working fluid in the first heat exchange module (1) is greater than the temperature of the working fluid in the second heat exchange module (5); If so, the refrigerant does not pass through the compressor (41) of the functional component (4).

15. The control method according to claim 14, characterized in that: The method for starting the refrigerant in the circulation module (3) to work comprises: Recording the actual temperature t1 of the working fluid of the second heat exchange module (5) and the set temperature t0 of the working fluid of the second heat exchange module (5); When t1 is less than t0, the functional component (4) of the circulation module (3) is turned on at a first power; When t1 is greater than or equal to t0, the functional component (4) of the circulation module (3) is turned on at a second power; wherein the first power is greater than the second power.

16. The control method according to claim 12, characterized in that: The control method further comprises: Determining whether the temperature of the working fluid in the first heat exchange module (1) is lower than the ambient temperature; If so, utilizing the functional component (4) of the circulation module (3) to generate heat and exchange heat with the second heat exchange module (5); If not, the first heat exchange module (1) and the second heat exchange module (5) are used to exchange heat.

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