CN110553422B

CN110553422B - Composite system of PVT coupled air source and control method

Info

Publication number: CN110553422B
Application number: CN201910726396.0A
Authority: CN
Inventors: 吴一梅; 荆莹; 柯彬彬; 尚瑞
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-08-25
Anticipated expiration: 2039-08-07
Also published as: CN110553422A

Abstract

A PVT coupling air source combined system relates to a multifunctional complementary system with functions of waste heat utilization, air source heat pump, water source heat pump and PVT assembly combined refrigeration, heating, water heating and power supply.

Description

Composite system of PVT coupled air source and control method

Technical Field

The invention relates to a PVT (polyvinyl chloride) coupled cold and heat source system, in particular to a composite system of a PVT coupled air source and a control method.

Background

In a multi-energy complementary system, the types of cold and heat sources are various, and the types of common cold sources include various water chilling units, various heat pumping units, various lithium bromide cold sources, multi-connected cold sources and the like. The commonly used heat sources include various boilers, various heat pump units, various lithium bromide heat sources, multi-connected heat sources, waste heat sources and the like, and additionally, the cold and heat storage technology, the heat recovery technology and the like are assisted. Different cold and heat sources are combined, and can be developed into various cold and heat source combination modes. Some cold and hot sources are combined together, which is not beneficial to exerting the advantages of each device and is an unreasonable combination mode; some cold and heat sources are combined together, so that the advantage complementation can be realized, the performance is obviously improved in the aspects of energy conservation, economy, reliability and the like, and the construction purpose of a multi-energy complementation system is really realized.

The PVT (PVT refers to a photovoltaic and photothermal integrated assembly) coupling air source combined system provided by the invention relates to a multifunctional complementary system with the functions of waste heat utilization, air source heat pump, water source heat pump and PVT assembly combined refrigeration, heating, water heating and power supply, and the advantages of various devices are fully utilized to achieve the optimal combined application effect.

Disclosure of Invention

In view of the above, the invention provides a composite system of a PVT coupling air source and a control method thereof, the invention combines a medium source heat pump (medium source heat exchanger), preferably a water source heat pump (water source heat exchanger) and an air source heat pump (air source heat exchanger) through a photovoltaic and photothermal integrated assembly, the water source heat pump and the air source heat pump can be operated independently or in series, the defect that the air source heat pump is low in operation efficiency or cannot be operated under a low-temperature environment is overcome, the defect that a solar heat pump system (PVT assembly) cannot be operated when illumination is insufficient is overcome, and the installed capacity, initial investment and operation cost of the system are reduced.

According to the invention, preferably, by acquiring a heat source from solar energy in winter, the heating energy efficiency of the system is higher than that of an air source heat pump which is used alone. The cooling tower is added in summer, so that the refrigeration efficiency of the water source heat pump is improved. In summer, the cooling tower and the water source heat pump are used as the main power for refrigeration, and when the weather is particularly hot, the air source heat pump part participates in refrigeration and is matched with each other, so that the requirements of buildings are met with lower energy consumption. The system can improve the utilization rate of natural energy to the maximum extent, and has obvious energy-saving effect.

Preferably, the system can realize multiple functions through mutual cooperation, including annual hot water supply, annual power supply, summer cooling and winter heating, meet the multiple demand of energy and supply time sharing, a tractor serves several purposes, improve equipment utilization efficiency.

Preferably, the winter system can preheat the refrigerant in the air source heat exchanger and then further absorb heat in the medium source heat exchanger to reach a required state, and only part of heat is absorbed in the air source heat exchanger, so that the frosting phenomenon of the air source heat exchanger is basically avoided.

Preferably, when the heat in the heat storage medium tank, preferably the heat storage water tank, cannot reach the requirement of a user in summer, the heat of the water source heat pump can be recovered, on one hand, the waste heat is utilized, on the other hand, the heat emission of the system to the environment is reduced, and the heat island effect is relieved.

Preferably, when sufficient heat is continuously stored in the heat storage medium box in summer, the heat can be dissipated through the cooling tower, and then the heat is dissipated for the photovoltaic and photothermal integrated assembly, so that the power generation efficiency is improved.

Specifically, the method comprises the following steps:

the utility model provides a combined type system in PVT coupling air source, includes PVT subassembly, heat accumulation medium case, medium source heat exchanger, air source heat exchanger, compressor, use side heat exchanger, its characterized in that:

the heat storage medium box is provided with a medium box first opening A, a second opening AS, a first opening B, a second opening BS, a PVT assembly and the medium box first opening A, the second opening AS forms a first loop, and heat is provided for the heat storage medium box through the first loop;

the medium source heat exchanger is provided with a first opening D, a second opening DS, a first opening E, a second opening ES, a first opening B of the heat storage medium box, a second opening BS, a first opening D of the medium source heat exchanger and a second opening DS, and a second loop is formed by the third pipeline and the fourth pipeline;

the use side heat exchanger is provided with a first opening H, a second opening HS, a first opening K and a second opening KS; the air source heat exchanger is provided with a first opening F and a second opening FS; a second opening ES of the medium source heat exchanger is communicated with a first opening F of the air source heat exchanger through a first branch, a first control valve is arranged on the first branch, a second opening FS of the air source heat exchanger is communicated with a first opening H of the use side heat exchanger through a first pipeline, and a first throttling device is arranged on the first pipeline; one end of the second pipeline is communicated with the first branch through a first connecting point, the first connecting point is positioned between a first control valve on the first branch and a first opening F of the air heat exchanger, the other end of the second pipeline is communicated with a first opening H of the use side heat exchanger, and a second throttling device is formed on the second pipeline; the second opening HS of the use side heat exchanger is communicated with the first opening E of the medium source heat exchanger through the compressor; one end of the second branch is communicated with the first opening F of the air source heat exchanger, the other end of the second branch is communicated with the compressor, and a second control valve is arranged on the second branch;

the user side and the first opening K and the second opening KS of the use side heat exchanger form a third loop.

Preferably, the system also comprises a four-way reversing valve communicated with the compressor, and the reversing of the working medium of the compressor in the system can be realized by controlling the four-way reversing valve.

Preferably, the gas-liquid separator is communicated with the compressor and used for separating the working medium.

Preferably, a fourth control valve and an eighth control valve are arranged on the fourth pipeline; the second opening DS of the medium source heat exchanger is communicated with the first opening B of the heat storage medium water tank through a fourth control valve and an eighth control valve;

and a third control valve and a seventh control valve are arranged on the third pipeline, and the second opening BS of the heat storage medium water tank is communicated with the first opening D of the medium source heat exchanger through the seventh control valve and the third control valve.

Preferably, the cooling tower is further included, one end of the cooling tower is communicated between the third control valve and the seventh control valve of the third pipeline through a fifth control valve, and the other end of the cooling tower is communicated between the fourth control valve and the eighth control valve of the fourth pipeline through a sixth control valve.

Preferably, an auxiliary electric heater is further included for providing auxiliary heating to the thermal storage medium tank.

Preferably, the system also comprises a first pump, a second pump and a third pump, wherein the first pump is used for providing circulating power for the first circuit; the second pump is used for providing circulating power for the second loop; the third pump is used to provide circulating power to the third circuit.

Preferably, the heat storage medium tank is a heat storage water tank, and the medium source heat exchanger is a water source heat exchanger.

Preferably, the hot water storage tank also supplies part of the hot water to the hot water supply side.

Preferably, the first throttling device and the second throttling device are a first electronic expansion valve and a second electronic expansion valve, respectively.

In addition, the invention also provides a control method of the system, which realizes the switching of the system between different working states by controlling the opening and closing of the first control valve, the second control valve, the first throttling device and the second throttling device.

Preferably, the switching of the system between the different operating states is achieved by controlling the opening and closing of the first to eighth control valves, the first and second throttle devices.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.

Figure 1 is a schematic diagram of a composite system of PVT coupled air sources of the present invention.

Figure 2 is a schematic diagram of the operation of the PVT coupled air source hybrid system of the present invention.

Figure 3 is another schematic diagram of the operation of the PVT coupled air source compounding system of the present invention.

Wherein: the solar energy heat-storage solar water heater comprises a photovoltaic and thermal integrated component 1, a thermal storage medium box 2, a cooling tower 3, a medium source heat exchanger 4, an air source heat exchanger 5, a first throttling device 61, a second throttling device 62, a first control valve 71, a second control valve 72, a second control valve 73, a third control valve 74, a fourth control valve 74, a fifth control valve 75, a sixth control valve 76, a seventh control valve 77, an eighth control valve 78, a first pump 81, a second pump 82, a third pump 83, a compressor 9, a gas-liquid separator 10, a four-way reversing valve 11, a use side heat exchanger 12, a user side 13, a user side 14, a fan 14, a hot water supply side 15 and an auxiliary electric heater 16.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.

The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.

The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various structures, these structures should not be limited by these terms. These terms are used to distinguish one structure from another structure. Thus, a first structure discussed below may be termed a second structure without departing from the teachings of the disclosed concept. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.

The following detailed description of embodiments of the invention is provided in conjunction with the accompanying figures 1-3:

the utility model provides a combined type system of PVT subassembly coupling air source, includes PVT subassembly, heat accumulation medium case 2, medium source heat exchanger 4, air source heat exchanger 5, compressor 9, use side heat exchanger 12, its characterized in that:

the heat storage medium box 2 is provided with a first medium box opening A, a second opening AS, a first opening B, a second opening BS, a PVT assembly and the first medium box opening A, and the second opening AS forms a first loop and is used for providing heat for the heat storage medium box 2;

the medium source heat exchanger 4 is provided with a first opening D, a second opening DS, a first opening E, a second opening ES, a first opening B of the heat storage medium box 2, a second opening BS, the first opening D of the medium source heat exchanger 4 and the second opening DS, and a second loop is formed by a third pipeline and a fourth pipeline;

the use-side heat exchanger 12 has a first opening H, a second opening HS, a first opening K, a second opening KS; the air source heat exchanger 5 has a first opening F, a second opening FS; the second opening ES of the medium source heat exchanger 4 is communicated with a first opening F of the air source heat exchanger 5 through a first branch, a first control valve 71 is arranged on the first branch, a second opening FS of the air source heat exchanger 5 is communicated with a first opening H of the use side heat exchanger 12 through a first pipeline, and a first throttling device 61 is installed on the first pipeline; one end of the second pipeline is communicated with the first branch through a first connecting point, the first connecting point is positioned between the first control valve 71 on the first branch and the first opening F of the air heat exchanger, the other end of the second pipeline is communicated with the first opening H of the use side heat exchanger 12, and a second throttling device 62 is formed on the second pipeline; the second opening HS of the use-side heat exchanger 12 communicates with the first opening E of the medium source heat exchanger 4 through the compressor 9; one end of the second branch is communicated with the first opening F of the air source heat exchanger 5, the other end of the second branch is communicated with the compressor 9, and a second control valve 72 is arranged on the second branch;

the user side 13 and the first opening K and the second opening KS of the user side heat exchanger 12 form a third loop.

In the combined system, in the heating state, the system can be switched between different working states by controlling the opening and closing of the first control valve 71, the second control valve 72, the first throttling device 61 and the second throttling device 62. In the case of a heating partial load, it is only necessary for the medium source heat exchanger 4 to be operated, the first throttle device 61 to be closed, the second control valve 72 to be closed, the second throttle device 62 to be opened, and the first control valve 71 to be opened. In the case of full heating load, when it is necessary to operate the medium source heat exchanger 4 and the air source heat exchanger 5 simultaneously, the second throttling device 62 is closed, the second control valve 72 is closed, the first throttling device 61 is opened, and the first control valve 71 is opened. Only when the air source heat exchanger 5 is operated, the first control valve 71 is closed, the second control valve 72 is opened, the second throttling means 62 is closed, and the first throttling means 61 is opened.

Preferably, the system also comprises a four-way reversing valve 11 communicated with the compressor 9, and reversing of working media of the compressor 9 in the system can be realized through control of the four-way reversing valve 11.

The system is switched between heating and cooling states by reversing the four-way reversing valve 11.

Preferably, the gas-liquid separator 10 is further included, and the gas-liquid separator 10 is communicated with the compressor 9 and used for separating working media.

Preferably, a fourth control valve 74 and an eighth control valve 78 are provided on the fourth line; the second opening DS communicates with the first opening B of the thermal storage medium tank through the fourth control valve 74 and the eighth control valve 78;

a third control valve 73 and a seventh control valve 77 are arranged on the third pipeline, and the second opening BS of the heat storage medium water tank is communicated with the first opening D of the medium source heat exchanger 4 through the seventh control valve 77 and the third control valve 73.

Preferably, the cooling tower 3 is further included, one end of the cooling tower 3 is communicated between the third control valve 73 and the seventh control valve 77 of the third pipeline through a fifth control valve 75, and the other end is communicated between the fourth control valve 74 and the eighth control valve 78 of the fourth pipeline through a sixth control valve 76.

Preferably, an auxiliary electric heater 16 is also included for providing auxiliary heating to the thermal storage medium tank 2.

Preferably, a first pump 81, a second pump 82 and a third pump 83 are also included, the first pump 81 being used to provide circulation power to the first circuit; a second pump 82 for providing circulating power to the second circuit; the third pump 83 is used to provide circulating power to the third circuit.

Preferably, the heat storage medium tank 2 is a heat storage water tank, and the medium source heat exchanger 4 is a water source heat exchanger.

Preferably, the hot water storage tank also delivers part of the hot water to the hot water supply side 15.

Preferably, the first throttling device 61 and the second throttling device 62 are a first electronic expansion valve and a second electronic expansion valve, respectively.

In addition, the invention also provides a control method of the system, which switches the system between different working states by controlling the opening and closing of the first control valve 71, the second control valve 72, the first throttling device 61 and the second throttling device 62.

Preferably, the switching of the system between the different operating states is effected by controlling the opening and closing of the first to eighth control valves 71-78, the first throttle device 61 and the second throttle device 62.

Preferably, the first throttle device 61 is a first electronic expansion valve and the second throttle device is a second electronic expansion valve.

Preferably, all or part of the first to eighth control valves 78 may be solenoid valves.

Preferably, the thermal storage medium tank 2 is a thermal storage water tank.

Preferably, the medium source heat exchanger 4 is a water source heat exchanger.

Preferably, the air source heat exchanger 5 exchanges heat with a fan 14.

The user terminal 13 of the present invention is also referred to as a terminal.

The PVT module of the invention is also referred to as photovoltaic-photothermal integrated module 1.

The principles and processes of the present invention are described below in conjunction with the accompanying figures 1-3:

as shown in fig. 1, a composite system of a PVT module coupled to an air source can provide free electric energy for the system and simultaneously utilize solar energy, air energy and waste heat to realize heating and/or cooling, preferably simultaneously realize multiple functions such as hot water supply and the like through equipment such as an air source heat exchanger 5, a medium source heat exchanger 4, a cooling tower 3, a heat storage medium box 2, a photovoltaic and photothermal integrated module 1 and the like, so as to meet various requirements of users.

As shown in fig. 2, fig. 2 illustrates the system operating at a refrigeration part load and at a refrigeration full load. The circulation flow of the refrigerating working medium (refrigerant) is schematic. Meanwhile, a water circulation schematic diagram when hot water supplied to a user is sufficient, and a water circulation schematic diagram when part of water is supplied to the cooling tower and part of water is supplied to the water tank are shown; water circulation schematic for a total water feed tank.

Under the condition of refrigeration part load operation, only the medium source heat exchanger 4 and the cooling tower 3 are required to operate in a matching way: the air source heat exchanger 5 does not need to be started. In this mode, the second throttle device 62 is opened, the first throttle device 61 is closed, the first control valve 71, the third control valve 73, the fourth control valve 74, the fifth control valve 75, and the sixth control valve 76 are opened, and the second control valve 72, the seventh control valve 77, and the eighth control valve 78 are closed. Refrigerant exhausted from the compressor 9 enters the medium source heat exchanger 4 through the four-way reversing valve 11 to release heat, and the released heat is discharged by the cooling tower 3. The heat-released refrigerant enters the second throttling device 62 through the first control valve 71 for throttling, enters the use side heat exchanger 12 for absorbing heat after throttling, takes away indoor heat, enters the compressor 9 through the four-way reversing valve 11 and the gas-liquid separator 10, and continues the next cycle.

Under the condition of full-load refrigeration operation, the medium source heat exchanger 4 and the air source heat exchanger 5 are operated jointly. In this mode, the first throttle device 61 is opened, the second throttle device 62 is closed, and the first control valve 71, the third control valve 73, the fourth control valve 74, the fifth control valve 75, and the sixth control valve 76 are opened; the second control valve 72, the seventh control valve 77, and the eighth control valve 78 are closed. The refrigerant discharged from the compressor 9 enters the medium source heat exchanger 4 through the four-way reversing valve 11 to release part of heat, and the released heat is discharged by the cooling tower 3. The heat-released refrigerant enters the air source heat exchanger 5 through the first control valve 71 to discharge the residual heat into the environment, then enters the first throttling device 61 for throttling, enters the use side heat exchanger 12 for absorbing heat after throttling to take away indoor heat, then enters the compressor 9 through the four-way reversing valve 11 and the gas-liquid separator 10, and continues the next cycle.

While the system is refrigerating, hot water generated by the photovoltaic and photothermal integrated assembly 1 is stored in the heat storage medium tank 2, and the hot water is delivered to the hot water supply side 15 according to the user demand. If the hot water is insufficient, the seventh control valve 77 and the eighth control valve 78 may be opened, and at this time, a part of the hot water in the medium source heat exchanger 4 may be discharged from the cooling tower 3 and a part of the hot water may supply heat to the heat storage medium tank 2. If part of the heat supplied by the medium-source heat exchanger 4 is insufficient, the fifth control valve 75 and the sixth control valve 76 may be closed, and the entire heat of the medium-source heat exchanger 4 may be supplied to the heat storage medium tank 2. If the hot water is insufficient at this time, the auxiliary electric heater 16 in the heat storage medium tank 2 can be activated to supply hot water.

As shown in fig. 3, fig. 3 illustrates a schematic diagram of the circulation flow direction of the working medium when the system is operated at partial load for heating and at full load for heating, and the PVT module is not supplied with hot water. The hot water circulation flow is also shown schematically.

Under the condition of heating part load operation, only the medium source heat exchanger 4 is required to operate independently, and the air source heat exchanger 5 is not required to be started. In this mode, the second throttle device 62 is opened, the first throttle device 61 is closed, the first control valve 71, the third control valve 73, the fourth control valve 74, the seventh control valve 77, and the eighth control valve 78 are opened, and the remaining control valves are closed. Refrigerant discharged from the compressor 9 enters the use side heat exchanger 12 through the four-way reversing valve 11 to release heat, and heat is provided for a user. The refrigerant after heat release enters the medium source heat exchanger 4 to absorb heat after being throttled by the second throttling device 62, and the refrigerant after heat absorption enters the compressor 9 through the four-way reversing valve 11 and the gas-liquid separator 10 to continue the next cycle.

Under full heating load operating conditions, the air source heat exchanger 5 is required to operate in conjunction with the media source heat exchanger 4. In this mode, the first throttle device 61 is opened, the second throttle device 62 is closed, the first control valve 71, the third control valve 73, the fourth control valve 74, the seventh control valve 77, and the eighth control valve 78 are opened, and the second control valve 72, the fifth control valve 75, and the sixth control valve 76 are closed. Refrigerant discharged from the compressor 9 enters the use side heat exchanger 12 through the four-way reversing valve 11 to release heat, and heat is provided for a user. The heat-released refrigerant enters the air source heat exchanger 5 to absorb heat after being throttled by the first throttling device 61, the heat-absorbed refrigerant enters the medium source heat exchanger 4 through the first control valve 71 to continuously absorb heat, the heat is provided by the heat storage medium tank 2, and the heat-absorbed refrigerant enters the compressor 9 through the four-way reversing valve 11 and the gas-liquid separator 10 to continue the next cycle.

Under the condition that the photovoltaic and photo-thermal integrated assembly 1 does not have hot water supply, only the air source heat exchanger 5 needs to operate independently, and the medium source heat exchanger 4 does not need to be started. In this mode, the first throttle device 61 is opened, the second throttle device 62 is closed, the second control valve 72 is opened, and the remaining electromagnetic valves are closed. Refrigerant discharged from the compressor 9 enters the use side heat exchanger 12 through the four-way reversing valve 11 to release heat, and heat is provided for a user. The heat-released refrigerant throttles in the first throttling device 61 and then enters the air source heat exchanger 5 to absorb heat, and the heat-absorbed refrigerant enters the compressor 9 through the second control valve 72, the four-way reversing valve 11 and the gas-liquid separator 10 to continue the next cycle. And the photovoltaic and photothermal integrated component 1 provides hot water for the hot water supply side 15 while the system heats. If there is insufficient hot water, the auxiliary electric heater 16 in the thermal storage medium tank 2 may be activated to provide hot water.

All electric quantities that the system operation needs are provided by photovoltaic light and heat integration subassembly 1, can save in the battery when unnecessary electric quantity, when the electric quantity that photovoltaic light and heat integration subassembly 1 provided is not enough, electric quantity in the preferred use battery, when the battery electric quantity also is not enough, and it is required by the commercial power system of providing.

In addition, if the heat storage medium tank 2 stores enough heat in summer and cannot radiate heat to the integrated photovoltaic-thermal module 1 any more, the third control valve 73 and the fourth control valve 74 can be closed, the seventh control valve 77, the eighth control valve 78, the fifth control valve 75 and the sixth control valve 76 can be opened, and the heat storage medium tank 2 is radiated through the cooling tower 3, so that the heat of the integrated photovoltaic-thermal module 1 is radiated, and the power generation efficiency is improved. The above description is one preferred way to use when the refrigeration cycle does not require the cooling tower 3 to dissipate heat).

Has the advantages that:

the invention has at least one of the following effects: 1) the photovoltaic and photothermal integrated component is used for combining the water source heat pump and the air source heat pump, the water source heat pump and the air source heat pump can be operated independently or in series through different control methods, solar energy and air energy are fully utilized, the defect that the air source heat pump is low in operation efficiency or cannot operate in a low-temperature environment is overcome, the defect that the solar heat pump system cannot operate in the case of insufficient illumination is overcome, and the installed capacity, initial investment and operation cost of the system are reduced.

2) In winter, the heating energy efficiency of the system is higher than that of a single air source heat pump by obtaining a heat source from solar energy. The cooling tower is added in summer, so that the refrigeration efficiency of the water source heat pump is improved. In summer, the cooling tower and the water source heat pump are used as the main power for refrigeration, and when the weather is particularly hot, the air source heat pump part participates in refrigeration and is matched with each other, so that the requirements of buildings are met with lower energy consumption. The system can improve the utilization rate of natural energy to the maximum extent, and has obvious energy-saving effect.

3) The system can realize multiple functions including annual hot water supply, annual power supply, summer cold supply and winter heat supply by mutually matching, meet the requirements of energy and time-sharing supply and one machine for multiple purposes, and improve the utilization efficiency of equipment.

4) The system can preheat the refrigerant in the air source heat exchanger and then further absorb heat in the water source heat exchanger to reach the required state in winter, and only part of heat is absorbed in the air source heat exchanger, so the frosting phenomenon of the system is basically avoided.

5) When the heat in the heat storage water tank can not reach the requirement of a user in summer, the heat of the water source heat pump can be recovered, on one hand, waste heat utilization is carried out, on the other hand, heat emission of the system to the environment is reduced, and the heat island effect is relieved.

6) According to the invention, the self heat productivity of the photovoltaic module in the power generation process is taken away by hot water circulation, and the effect of cooling the photovoltaic cell is achieved, so that the power generation capacity and the power generation efficiency of the system are obviously improved.

7) When sufficient heat continues to be stored in the heat storage water tank in summer, the heat can be dissipated through the cooling tower, and then the heat is dissipated for the photovoltaic and photo-thermal integrated assembly, so that the power generation efficiency is improved.

8) And the heat storage water tank is adopted, so that energy can be efficiently stored, and energy loss is reduced. Meanwhile, energy can be stored at night, the solar energy collector can be used in the daytime, peak clipping and valley filling are performed, the cost is saved, and the electricity utilization pressure in the daytime is reduced.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. The utility model provides a combined type system in photovoltaic light and heat integration subassembly coupling air source, includes photovoltaic light and heat integration subassembly, heat accumulation medium case (2), medium source heat exchanger (4), air source heat exchanger (5), compressor (9), use side heat exchanger (12), its characterized in that:

the heat storage medium box (2) is provided with a first opening A, a second opening AS, a first opening B, a second opening BS of the medium box, the photovoltaic and photothermal integrated assembly and the first opening A of the medium box, and the second opening AS form a first loop and are used for providing heat for the heat storage medium box (2) through the first loop;

the medium source heat exchanger (4) is provided with a first opening D, a second opening DS, a first opening E, a second opening ES, a first opening B of the heat storage medium box (2), a second opening BS, the first opening D of the medium source heat exchanger (4), the second opening DS, a third pipeline and a fourth pipeline to form a second loop;

the use-side heat exchanger (12) has a first opening H, a second opening HS, a first opening K, a second opening KS; the air source heat exchanger (5) is provided with a first opening F and a second opening FS; a second opening ES of the medium source heat exchanger (4) is communicated with a first opening F of the air source heat exchanger (5) through a first branch, a first control valve (71) is arranged on the first branch, a second opening FS of the air source heat exchanger (5) is communicated with a first opening H of the use side heat exchanger (12) through a first pipeline, and a first throttling device (61) is installed on the first pipeline; one end of the second pipeline is communicated with the first branch through a first connecting point, the first connecting point is positioned between a first control valve (71) on the first branch and a first opening F of the air heat exchanger, the other end of the second pipeline is communicated with a first opening H of the use side heat exchanger (12), and a second throttling device (62) is formed on the second pipeline; the second opening HS of the use side heat exchanger (12) is communicated with the first opening E of the medium source heat exchanger (4) through the compressor (9); one end of the second branch is communicated with a first opening F of the air source heat exchanger (5), the other end of the second branch is communicated with the compressor (9), and a second control valve (72) is arranged on the second branch;

the user terminal (13) and the first opening K and the second opening KS of the use side heat exchanger (12) form a third loop.

2. The system of claim 1, wherein: the four-way reversing valve (11) is communicated with the compressor (9), and reversing of working media of the compressor (9) in the system can be realized through control of the four-way reversing valve (11).

3. The system according to any one of claims 1 and 2, wherein: the gas-liquid separator (10) is communicated with the compressor (9) and is used for separating working media.

4. The system according to any one of claims 1 and 2, wherein: a fourth control valve (74) and an eighth control valve (78) are arranged on the fourth pipeline; the second opening DS of the medium source heat exchanger (4) is communicated with the first opening B of the heat storage medium tank (2) through a fourth control valve (74) and an eighth control valve (78);

and a third control valve (73) and a seventh control valve (77) are arranged on the third pipeline, and the second opening BS of the heat storage medium tank (2) is communicated with the first opening D of the medium source heat exchanger (4) through the seventh control valve (77) and the third control valve (73).

5. The system of claim 4, wherein: the cooling tower (3) is further included, one end of the cooling tower (3) is communicated between a third control valve (73) and a seventh control valve (77) of a third pipeline through a fifth control valve (75), and the other end of the cooling tower (3) is communicated between a fourth control valve (74) and an eighth control valve (78) of a fourth pipeline through a sixth control valve (76).

6. The system according to any one of claims 1 and 2, wherein: and the auxiliary electric heater (16) is used for providing auxiliary heating for the heat storage medium box (2).

7. The system according to any one of claims 1 and 2, wherein: the system also comprises a first pump (81), a second pump (82) and a third pump (83), wherein the first pump (81) is used for providing circulating power for the first circuit; a second pump (82) for providing circulating power to the second circuit; a third pump (83) is used to provide circulating power to the third circuit.

8. The system according to any one of claims 1 and 2, wherein: the heat storage medium tank (2) is a heat storage water tank, and the medium source heat exchanger (4) is a water source heat exchanger.

9. The system of claim 8, wherein: the hot water storage tank also supplies part of the hot water to the hot water supply side (15).

10. The system according to any one of claims 1 and 2, wherein: the first throttling device (61) and the second throttling device (62) are a first electronic expansion valve and a second electronic expansion valve respectively.

11. A method of controlling a system according to any of claims 1-3, 6-10, characterized in that the switching of the system between different operating states is effected by controlling the opening and closing of the first control valve (71), the second control valve (72), the first throttle means (61) and the second throttle means (62).

12. A method of controlling a system according to claim 5, characterized in that the switching of the system between different operating states is effected by controlling the opening and closing of the first to eighth control valves (71, 72, 73, 74, 75, 76, 77, 78), the first throttle means (61) and the second throttle means (62).