A heat pump system and control method

Abstract

The application provides a heat pump system and a control method, and the heat pump system comprises a first heat exchange module, a photovoltaic module is arranged on the first heat exchange module, the photovoltaic module is used for photovoltaic power generation, a circulating module is connected with the first heat exchange module, refrigerant and a functional component are arranged in the circulating module, a second heat exchange module is connected with the circulating module, and a control module is arranged, the 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, and the technical problem that the photovoltaic module causes uneven system temperature when working is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar energy, in particular to a heat pump system and a control method. BACKGROUND

[0002] A photovoltaic-thermal component or system can utilize both photovoltaic and thermal solar energy. The power generation of a crystalline silicon photovoltaic component will decrease with the increase of its temperature, and high temperature will also affect the service life of the photovoltaic cell. The photovoltaic-thermal component can take away and utilize waste heat while generating electricity. The basic principle of the 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 the purpose of energy saving and carbon reduction.

[0003] The current photovoltaic-thermal component includes two types according to the structure or the type of circulating working medium: one is that the refrigerant directly flows through the photovoltaic-thermal component and takes away the heat, and this type includes common structures such as direct expansion type and tube plate type; the other is that the cooling liquid flows through the photovoltaic-thermal component and takes away the heat to a heat exchanger, and the refrigerant circulation module is connected to the other side of the heat exchanger. The latter has the advantages of stable and reliable system structure, low cost, etc.

[0004] However, due to the large number of heat generation and heat storage components of the photovoltaic-thermal component, the temperature distribution of each component is not uniform, thereby wasting energy. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a heat pump system and a control method to solve the technical problem of uneven system temperature caused by the photovoltaic component in operation in the related art.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme: a heat pump system is provided, comprising:

[0007] A first heat exchange module is provided with a photovoltaic component; the photovoltaic component is used to absorb solar energy;

[0008] A circulation module is connected to the first heat exchange module; the circulation module is provided with a refrigerant and a functional component;

[0009] A second heat exchange module is connected to the circulation module;

[0010] A control module controls the exchange of heat between the first heat exchange module, the functional component and the second heat exchange module according to the environmental parameters and the parameters of the heat pump system.

[0011] Further, the first heat exchange module comprises:

[0012] A first heat storage component is provided with a first heat exchange working medium;

[0013] A first heat exchange pipeline is connected with the first heat storage component, and the first heat exchange pipeline is connected with the photovoltaic module; a first adjusting pump for adjusting the flow rate of the working medium in the first heat exchange pipeline is arranged on the first heat exchange pipeline.

[0014] Further, the first heat exchange module comprises a first supplementary pipeline connected with the first heat storage component to introduce the first heat exchange working medium into the first heat storage component.

[0015] Further, the second heat exchange module comprises:

[0016] A second heat storage component in which a second heat exchange working medium is arranged;

[0017] A second supplementary pipeline connected with the second heat storage component to introduce the second heat exchange working medium into the second heat storage component.

[0018] Further, the circulation module comprises:

[0019] A second heat exchange pipeline connected with the first heat exchange module and connected with the second heat exchange module;

[0020] A control valve for controlling the flow direction of the working medium in the second heat exchange pipeline.

[0021] Further, the circulation module comprises:

[0022] A compressor arranged on the second heat exchange pipeline;

[0023] An evaporator in communication with the second heat exchange pipeline;

[0024] A condenser in communication with the second heat exchange pipeline.

[0025] Further, the second heat exchange pipeline comprises:

[0026] A heat supply pipeline, one end of which is connected with the first heat exchange module, and the other end of which is connected with the second heat exchange module; the compressor is arranged on the heat supply pipeline;

[0027] A return pipeline, one end of which is connected with the first heat exchange module, and the other end of which is connected with the second heat exchange module.

[0028] Further, the control valve comprises:

[0029] A first control valve is arranged on the heat supply pipeline, and is located upstream of the compressor;

[0030] A second control valve is arranged on the return pipeline;

[0031] 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.

[0032] Further, the control valve comprises a third control valve arranged on the heat supply pipeline, and located downstream of the compressor; the inlet of the condenser is communicated with the third control valve, and the outlet of the condenser is communicated with the return pipeline.

[0033] Further, the circulation module comprises:

[0034] A heat exchange branch is connected with the first control valve at one end, and connected with the third control valve at the other end; a second regulating pump is arranged on the heat exchange branch; and / or,

[0035] A throttling component is arranged on the return pipeline.

[0036] Further,

[0037] The environmental parameters comprise temperature, radiation and wind speed of the environment; and / or,

[0038] The system parameters comprise the flow rate and temperature of the working medium in the heat pump system; and / or,

[0039] The control module comprises a first temperature sensor arranged on the first heat exchange module and a second temperature sensor arranged on the second heat exchange module.

[0040] The control method of the embodiment is applicable to the heat pump system described above, and the control method comprises:

[0041] Judging whether the photovoltaic assembly generates electricity;

[0042] If yes, controlling the flow rate of the working medium in the heat pump system according to the radiation of the environment, the power generation of the environment and the temperature of the working medium in the first heat exchange module;

[0043] If no, controlling the flow rate of the working medium in the heat pump system according to the temperature of the second heat exchange module.

[0044] Further, the method for controlling the state of the working medium in the heat pump system according to the radiation of the environment, the power generation of the environment and the temperature of the working medium in the first heat exchange module comprises:

[0045] record the irradiance d1 and the power generation d2 of the photovoltaic module; when |d1|>|d2|, increase the flow rate of the working medium in the heat pump system.

[0046] Further, 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 comprises:

[0047] The refrigerant in the circulation module starts to work;

[0048] determine whether the temperature of the working medium of the first heat exchange module is greater than the temperature of the working medium of the second heat exchange module;

[0049] If yes, the refrigerant does not pass through the compressor of the functional assembly.

[0050] Further, the method for starting the refrigerant in the circulation module to work comprises:

[0051] record the actual temperature t1 of the working medium of the second heat exchange module and the set temperature t0 of the working medium of the second heat exchange module;

[0052] When t1 is less than t0, the functional assembly of the circulation module is started at a first power;

[0053] When t1 is greater than or equal to t0, the functional assembly of the circulation module is started at a second power; wherein the first power is greater than the second power.

[0054] Further, the control method further comprises:

[0055] determine whether the temperature of the working medium of the first heat exchange module is lower than the ambient temperature;

[0056] If yes, heat is generated by the functional assembly of the circulation module, and heat is exchanged with the second heat exchange module;

[0057] If no, heat is exchanged between the first heat exchange module and the second heat exchange module.

[0058] Beneficial effects:

[0059] The heat pump system of the present application, when the photovoltaic module generates electricity, the absorbed solar heat energy is taken away by the working fluid circulation loop, and is stored into 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 be taken into the high-grade heat storage component (second heat exchange module) through compression heating, and the high-grade heat storage component generates hot water required by the user. The use of high and low temperature heat storage components realizes three aspects: on the one hand, the working temperature of the photovoltaic module is considered, the control system is simplified, and the reliability is improved; on the other hand, the heat loss of the low-grade heat storage component is reduced, which helps to improve the system energy efficiency; the third aspect is to improve 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 the technical problem of uneven system temperature caused by the working of the photovoltaic module is solved. BRIEF DESCRIPTION OF DRAWINGS

[0060] Fig. 1 is a structural schematic diagram of the heat pump system adopted by the embodiment of the present application;

[0061] Fig. 2 is a schematic diagram of the heat exchange pipeline of the heat pump system adopted by the embodiment of the present application;

[0062] Fig. 3 is a flow chart of the control method adopted by the embodiment of the present application.

[0063] Among them, the above drawings include the following reference signs:

[0064] 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, heat supply 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

[0065] In order to enable the personnel in the technical field to better understand the present application scheme, the technical scheme in the present application embodiment will be described clearly and completely in combination with the drawings in the present application embodiment. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the field without creative labor should belong to the scope of protection of the present application.

[0066] Referring toFigs. 1-3 According to the embodiment of the present application, a heat pump system is provided, comprising: 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 for photovoltaic power generation; a circulating module 3, wherein the circulating module 3 is connected with the first heat exchange module 1; a refrigerant and a functional component 4 are arranged in the circulating module 3; a second heat exchange module 5, wherein the second heat exchange module 5 is connected with the circulating module 3; and 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.

[0067] With the above arrangement, when the photovoltaic module generates electricity, the absorbed solar heat energy is taken away by the working medium circulation loop and stored into the low-grade heat storage component (the first heat exchange module 1), which further serves as one of the evaporators of the refrigerant circulating module 3. The heat absorbed by the refrigerant will be taken into the high-grade heat storage component (the second heat exchange module 5) through compression heating, and the high-grade heat storage component generates hot water required by the user. The use of the high and low temperature heat storage components realizes three aspects: on the one hand, the working temperature of the photovoltaic module is considered, the control system is simplified, and the reliability is improved; on the other hand, the heat loss of the low-grade heat storage component is reduced, which helps to improve the system energy efficiency; and thirdly, the flexibility and function of the high-grade heat storage component are improved, which is not affected or less affected by the low-grade heat storage component, and the technical problem of uneven system temperature caused by the photovoltaic module during operation is solved.

[0068] In the heat pump system of the embodiment, referring to Figs. 1-3 The first heat exchange module 1 comprises: a first heat storage component 12, wherein a first heat exchange working medium is arranged in the first heat storage component 12; a first heat exchange pipeline 13, wherein the first heat exchange pipeline 13 is connected with the first heat storage component 12, and the first heat exchange pipeline 13 is connected with the photovoltaic module 2; and a first adjusting pump 14 arranged on the first heat exchange pipeline 13, which is used for adjusting the flow rate of the working medium in the first heat exchange pipeline 13.

[0069] In this way, by controlling the first adjusting pump 14, the flow rate of the working medium in the first heat exchange pipeline 13 is adjusted, and the heat exchange speed between the photovoltaic module 2 and the first heat storage component 12 is controlled, so as to adjust the temperature uniformity of the system.

[0070] Referring to Figs. 1-3 In the heat pump system of the embodiment, the first heat exchange module 1 comprises a first supplementary pipeline 15, wherein the first supplementary pipeline 15 is connected with the first heat storage component 12, so as to introduce the first heat exchange working medium into the first heat storage component 12.

[0071] With the above arrangement, the temperature level of the first heat storage component 12 is reduced by introducing the first heat exchange working medium into the first heat storage component 12.

[0072] Referring to Figs. 1-3 In the heat pump system of the embodiment, the second heat exchange module 5 comprises: a second heat storage component 51, in which a second heat exchange working medium is arranged; and a second supplement pipeline 52, which is connected with the second heat storage component 51 to introduce the second heat exchange working medium into the second heat storage component 51.

[0073] With the above arrangement, the first heat exchange working medium is introduced into the second heat storage component 51 to reduce the temperature level thereof.

[0074] In the heat pump system of the embodiment, referring to Figs. 1-3 , the circulation module 3 comprises: a second heat exchange pipeline 31, which is connected with the first heat exchange module 1 and the second heat exchange module 5; and a control valve, which is used to control the flow direction of the working medium of the second heat exchange pipeline 31.

[0075] With the above arrangement, the control valve is arranged to control the flow direction of the working medium of the second heat exchange pipeline 31, so that heat exchange is performed at different positions, thereby adjusting the temperature uniformity of the system.

[0076] Referring to Figs. 1-3 In the heat pump system of the embodiment, the circulation module 3 comprises: a compressor 41, which is arranged on the second heat exchange pipeline 31; an evaporator 42, which is in communication with the second heat exchange pipeline 31; and a condenser 43, which is in communication with the second heat exchange pipeline 31.

[0077] With the above arrangement, the heat pump system comprises a photovoltaic (photothermal) assembly, two sets of different grade (different working temperature) heat storage components based on liquid medium, a refrigerant circulation component, and a compressor bypass component, which enriches the flow path of the working medium.

[0078] In the heat pump system of the embodiment, referring to Figs. 1-3 , the second heat exchange pipeline 31 comprises: a heat supply pipeline 311, one end of which is connected with the first heat exchange module 1; the other end of the heat supply pipeline 311 is connected with the second heat exchange module 5; the compressor 41 is arranged on the heat supply pipeline 311; and a return pipeline 312, one end of which is connected with the first heat exchange module 1, and the other end of the return pipeline 312 is connected with the second heat exchange module 5.

[0079] With the above arrangement, the working medium is guaranteed to exchange heat among the three modules.

[0080] Referring to Figs. 1-3In the heat pump system of the embodiment, the control valve comprises a first control valve 61 arranged on the heat supply pipeline 311, the first control valve 61 being located upstream of the compressor 41; a second control valve 62 arranged on the return pipeline 312; wherein 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.

[0081] With the above arrangement, whether the evaporator 42 participates in heat exchange can be controlled by the control valve, thereby meeting the requirements of different working conditions.

[0082] In the heat pump system of the embodiment, referring to Figs. 1-3 , the control valve comprises a third control valve 63 arranged on the heat supply pipeline 311, 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.

[0083] With the above arrangement, whether the condenser 43 participates in heat exchange can be controlled by the control valve, thereby meeting the requirements of different working conditions.

[0084] In the heat pump system of the embodiment, referring to Figs. 1-3 , the circulation module 3 comprises a heat exchange branch 313, one end of the heat exchange branch 313 being connected with the first control valve 61, and the other end of the heat exchange branch 313 being connected with 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 pipeline 312.

[0085] With the above arrangement, whether the compressor 41 participates in heat exchange can be controlled by the control valve, thereby meeting the requirements of different working conditions.

[0086] In the heat pump system of the embodiment, referring to Figs. 1-3 , the environmental parameters comprise temperature, radiation and wind speed of the environment; and / or the system parameters comprise the flow rate and temperature of the working medium 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.

[0087] With the above arrangement, the control module can adjust the working states of the compressor 41, the pump and the valve according to the current environmental parameters (temperature, radiation, wind speed, etc.) and system parameters (flow rate, temperature, etc.) to maximize the energy efficiency of the system.

[0088] The control method of the embodiment is applicable to the heat pump system described above, and comprises: judging whether the photovoltaic module 2 generates electricity; if yes, controlling the flow rate of the working medium in the heat pump system according to the radiation of the environment, the power generation of the environment and the temperature of the working medium in the first heat exchange module 1; and if no, controlling the flow rate of the working medium in the heat pump system according to the temperature of the second heat exchange module 5.

[0089] With the above arrangement, when the photovoltaic module generates electricity, the absorbed solar heat is taken away by the working medium circulation loop and stored into the low-grade heat storage component (the 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 be taken into the high-grade heat storage component (the second heat exchange module 5) through compression heating, and the high-grade heat storage component generates hot water required by the user. The use of the high and low temperature heat storage components realizes three aspects: on the one hand, the working temperature of the photovoltaic module is considered, the control system is simplified, and the reliability is improved; on the other hand, the heat loss of the low-grade heat storage component is reduced, which helps to improve the system energy efficiency; and thirdly, the flexibility and function of the high-grade heat storage component are improved, which is not or less affected by the low-grade heat storage component, and the technical problem of uneven system temperature caused by the working of the photovoltaic module is solved.

[0090] In the control method of the embodiment, referring to Figs. 1-3 , the method for controlling the state of the working medium in the heat pump system according to the radiation of the environment, the power generation of the environment and the temperature of the working medium 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 medium in the heat pump system.

[0091] With the above arrangement, when |d1|>|d2|, it indicates that the heat absorbed by the photovoltaic module 2 is sufficient, and increasing the flow rate of the working medium in the heat pump system can increase the efficiency of heat utilization.

[0092] In the control method of the embodiment, referring to Fig. 3 , 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; judging whether the temperature of the working medium of the first heat exchange module 1 is greater than the temperature of the working medium of the second heat exchange module 5; if yes, the refrigerant does not pass through the compressor 41 of the functional component 4.

[0093] With the above arrangement, whether the temperature of the working medium of the first heat exchange module 1 is greater than the temperature of the working medium of the second heat exchange module 5 is determined by the first heat exchange module 1 first, so as to improve the utilization efficiency of heat.

[0094] In the control method of the embodiment, referring to Fig. 3The method for starting the operation of the refrigerant in the circulation module 3 comprises: 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 started at a first power; when t1 is greater than or equal to t0, the functional component 4 of the circulation module 3 is started at a second power; wherein the first power is greater than the second power.

[0095] With the above setting, when t1 is less than t0, it indicates that the second heat exchange module 5 needs to be quickly heated, and the refrigerant system starts to work, in order to shorten the starting time, it should be started at the maximum power; when t1 is greater than or equal to t0, it indicates that the heating required by the second heat exchange module 5 is not urgent, and the refrigerant system starts to work, and the heating effect is maintained at a suitable system power.

[0096] In the control method of the embodiment, referring to Fig. 3 The control method further comprises: judging whether the temperature of the working medium of the first heat exchange module 1 is lower than the ambient temperature; if yes, heating by the functional component 4 of the circulation module 3 and exchanging heat with the second heat exchange module 5; if no, exchanging heat between the first heat exchange module 1 and the second heat exchange module 5.

[0097] With the above setting, if the temperature of the working medium of the first heat exchange module 1 is lower than the ambient temperature, it indicates that the heat stored in the working medium of the first heat exchange module 1 is low at this time, and heating by the functional component 4 of the circulation module 3 can obtain higher heat exchange efficiency. If the temperature of the working medium of the first heat exchange module 1 is greater than or equal to the ambient temperature, it indicates that the heat stored in the working medium of the first heat exchange module 1 is high at this time, and exchanging heat between the first heat exchange module 1 and the second heat exchange module 5 can obtain higher heat exchange efficiency.

[0098] The basic structure of the scheme described in the embodiment is as follows Fig. 3 Fig. 1The photovoltaic module 2 absorbs solar heat during operation, and the waste heat is taken away by the first heat exchange medium and stored in the first heat storage component 12 through the first heat exchange medium cycle, which 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 be the same or different medium solution 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 tend to be consistent with the working temperature of the photovoltaic module 2. Considering the influence of environmental heat dissipation, the optimal state is that the temperature value should not be too high (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 system energy efficiency, but in the extreme case (large heat generation and small heat consumption), the first heat storage component 12 and the photovoltaic module 2 can reach a high temperature at the same time, and the first heat exchange medium can be supplemented to reduce the temperature level. Under normal circumstances, the low temperature difference between the first heat storage component 12 and the environment also helps to simplify the structural design of the photovoltaic light heat module. The control system will adjust the working state of the first regulating pump 14 according to the environmental temperature, photovoltaic power generation, first heat exchange medium temperature, etc. Although a temperature measurement point can be designed on the photovoltaic module 2 to directly adjust the speed of the first regulating pump 14 according to the temperature change, due to the large area of the photovoltaic irradiation, the temperature non-uniformity may be more significant, and the real temperature of the module cannot be accurately obtained. In addition, the use of a large number of temperature sensors will also lead to an increase in cost.

[0099] The control method of the present embodiment is described as follows:

[0100] The present application proposes a simple determination method: the control system continuously compares the irradiance and the change rate of the module power generation at the current time and the previous time. When the irradiance change is higher than the power generation change (when the irradiance increase is higher than the power generation increase), it can be determined that the module temperature rises obviously, and the speed of the first regulating pump 14 should be increased for cooling in time. In other cases, the speed of the first regulating pump 14 can be maintained unchanged.

[0101] When the photovoltaic module 2 does not generate electricity (for example, at night), although the light and heat energy is stored into the first heat storage component 12 during the day, whether the back-end refrigerant circulation module 3 draws heat from the first heat storage component 12 is determined according to the back-end energy consumption. The second heat storage component 51 is a high-grade hot water tank for end users. In consideration of user experience, the time from the start of the system to the output of hot water at the specified temperature of the user should be as short as possible, and ideally reach the instant heating purpose. To this end, at least the actual temperature and actual flow of the second heat storage component 51 tank should be detected, and the working process of the refrigerant system should be adjusted according to the set outlet water temperature. When the actual temperature of the second heat storage component 51 tank is lower than the set outlet water 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 maximum flow rate, and after passing through the compressor, it will enter the second heat storage component 51 tank to release heat, so as to quickly raise the outlet water temperature. 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 maximum flow rate, and draw heat energy from the air and release heat into the second heat storage component 51 tank. In actual design, considering that the heat exchange efficiency between refrigerant and liquid medium is higher than that between refrigerant and air, there may be a situation that the temperature of the first heat storage component 12 is slightly lower than the ambient temperature, but still makes all or most of the refrigerant flow through the first heat storage component 12 rather than the evaporator 42. When the actual temperature of the second heat storage component 51 tank reaches the set outlet water temperature, the refrigerant system starts to maintain the heating effect at an appropriate power. In some cases, for example, the entire heat consumption is very small, or when the module works at a high temperature during the day (the temperature of the first heat storage component 12 is high), or when working in hot and humid conditions (the set outlet water temperature of the second heat storage component 51 is low), there may be a situation that the temperature of the first heat storage component 12 is higher than the temperature of the second heat storage component 51 tank, at this time, the refrigerant can flow through the second regulating pump 33 (bypassing the compressor) at maximum flow rate through the action of the first, second and third control valves, reducing the power consumption of the system, and directly exchanging heat between the high and low temperature heat sources.

[0102] In actual installation, according to the size of the photovoltaic and thermal module, the capacity of the first heat storage component 12 should be increased as much as possible to collect as much light and heat energy absorbed by the photovoltaic module 2, while reducing the temperature difference between the first heat storage component 12 and the environment. The second heat storage component 51 can be arranged in the user's house, and its capacity should be designed to match the hot water consumption of the user.

[0103] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms is arbitrary apart from their definition in the specification or by understanding that the use of these terms in the present description is solely for the purpose of nomenclature and does not in any way limit the scope of the application. Furthermore, the terms "comprise", "comprising", "include", "including", and the like are to be construed in their non-limiting sense as opposed to in their limiting sense, that is as set forth in a claim only in its "open" rather then its "closed" meaning that terminates the claim, unless specifically stated otherwise in the claim itself. The term "comprise", "comprising", and the like, when used in the foregoing description is used in its open-ended sense, that is as a transition word that does not exclude additional steps, structures, features, elements, etc. to those already recited.

[0104] Optionally, the specific examples in the embodiments can refer to the examples described in the above embodiments, and the embodiments will not be described here again.

[0105] The sequence numbers of the above-described embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0106] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0107] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A heat pump system, characterized in that, include: A first heat exchange module (1) is provided with a photovoltaic module (2); the photovoltaic module (2) is used to absorb solar energy; A circulation module (3) is connected to the first heat exchange module (1); the circulation module (3) contains a refrigerant and a functional component (4). The second heat exchange module (5) is connected to the circulation module (3); 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 the parameters of the heat pump system.

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

3. The heat pump system according to claim 2, characterized in that, The first heat exchange module (1) includes a first supplementary pipeline (15), which is connected to the first heat storage component (12) to introduce 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) includes: The second heat storage component (51) is provided with a second heat exchange medium. The second supplementary pipeline (52) is connected to the second heat storage component (51) to introduce 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 loop module (3) includes: 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 is used to control the flow direction of the working fluid in the second heat exchange pipeline (31).

6. The heat pump system according to claim 5, characterized in that, The loop module (3) includes: The compressor (41) is installed on the second heat exchange pipeline (31); Evaporator (42) is connected to the second heat exchange pipeline (31); The condenser (43) is connected to the second heat exchange pipeline (31).

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

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

9. The heat pump system according to claim 7, characterized in that, The control valve includes a third control valve (63), which is located on the heating pipeline (311) and 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 return pipeline (312).

10. The heat pump system according to claim 9, characterized in that, The loop 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 provided on the heat exchange branch (313); and / or, A throttling component (32) is provided on the return pipe (312).

11. The heat pump system according to claim 1, characterized in that, The environmental parameters include ambient temperature, radiance, and wind speed; and / or, The system parameters include the working fluid flow rate and working fluid temperature within the heat pump system; and / or, The control module includes a first temperature sensor (71) disposed on the first heat exchange module (1) and a second temperature sensor (72) disposed 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 includes: Determine whether the photovoltaic module (2) generates electricity; If so, the flow rate of the working fluid in the heat pump system is controlled according to the ambient irradiance, the ambient power generation and the temperature of the working fluid in the first heat exchange module (1). If not, the flow rate of the working fluid 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 based on the ambient irradiance, the ambient power generation, and the temperature of the working fluid in the first heat exchange module (1) includes: Record the irradiance d1 and the power generation d2 of the photovoltaic module (2); when |d1|>|d2|, increase 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 fluid in the heat pump system based on the temperature of the second heat exchange module (5) includes: The refrigerant in the circulation module (3) begins to work; Determine 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) includes: Record the actual temperature t1 of the working fluid in the second heat exchange module (5) and the set temperature t0 of the working fluid in the second heat exchange module (5); When t1 is less than t0, the functional component (4) of the loop module (3) is turned on with the first power; When t1 is greater than or equal to t0, the functional component (4) of the loop module (3) is turned on with the 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 includes: Determine whether the temperature of the working fluid in the first heat exchange module (1) is lower than the ambient temperature; If so, the heat is generated by the functional component (4) of the circulation module (3) and exchanged 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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