CN214701052U - Photovoltaic air conditioner cooling system - Google Patents

Abstract

The application relates to a photovoltaic air conditioner heat dissipation system which comprises a circulating heat dissipation passage and a refrigerant heat dissipation module arranged in the circulating heat dissipation passage, wherein the circulating heat dissipation passage comprises an outer circulating heat dissipation passage and an inner circulating heat dissipation passage; when the unit is shut down, the refrigerant heat dissipation module arranged in the inner circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module. The photovoltaic power generation heating module can be effectively and energy-savingly cooled no matter when the unit runs or is shut down, and the photovoltaic power generation heating module can still normally work when the unit is shut down.

Description

Photovoltaic air conditioner cooling system

Technical Field

The application belongs to the technical field of photovoltaic air conditioner cooling systems, and particularly relates to a photovoltaic air conditioner cooling system.

Background

With the development and technical improvement of clean energy, light energy becomes a new favorite of the times, and the photovoltaic technology is gradually aroused in the air conditioning industry. The photovoltaic air conditioner can not only supply power to the air conditioning unit, but also can generate power continuously at any time when sunlight exists, and store or feed redundant electric quantity into a network. Photovoltaic air conditioning cooling systems typically have a photovoltaic inverter module for converting a photovoltaic power source into a power source or a grid-fed power source that can be used directly by the product.

When the unit is shut down, the photovoltaic power generation still continues to operate, the photovoltaic electric energy is continuously converted into the available power for other equipment to use and store, the photovoltaic power generation heating modules such as the photovoltaic inverter and the compressor driving plate still continue to generate heat in the process, and the temperature rise is possibly too high due to the fact that the air conditioning system is shut down and the fan does not operate and cannot effectively dissipate heat, and the normal work of the photovoltaic power generation heating modules is influenced.

SUMMERY OF THE UTILITY MODEL

For overcoming at least to a certain extent when the unit shuts down, photovoltaic power generation is still continuing the operation, photovoltaic power generation heating modules such as photovoltaic inverter, compressor drive plate will continue to generate heat in this process still, because of air conditioning system shuts down, the fan does not operate and can't effectively dispel the heat, probably leads to the temperature rise too high, influences the problem that photovoltaic power generation heating module normally worked, this application provides a photovoltaic air conditioner cooling system, includes:

the cooling system comprises a circulating heat dissipation passage and a refrigerant heat dissipation module arranged in the circulating heat dissipation passage;

the circulating heat dissipation passage comprises an external circulating heat dissipation passage and an internal circulating heat dissipation passage;

when the unit operates, the refrigerant heat dissipation module arranged in the external circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module;

when the unit is shut down, the refrigerant heat dissipation module arranged in the internal circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module.

Further, the internal circulation heat dissipation path includes:

a compressor, an outdoor heat exchanger and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the gas-liquid separator;

the refrigerant flows from the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module and the gas-liquid separator and then returns to the compressor.

Further, the outer circulation heat dissipation path includes:

all the external units operate the circulating heat dissipation passage and part of the external units operate the circulating heat dissipation passage.

Further, all outer quick-witted operation circulation heat dissipation route includes:

the system comprises a compressor, an outdoor heat exchanger, a subcooler, a liquid pipe, an indoor heat exchanger, an air pipe and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the subcooler;

when the refrigeration is operated, the refrigerant flows out of the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the subcooler and the liquid pipe, enters the indoor heat exchanger for evaporation, flows through the gas-liquid separator from the gas pipe and flows back to the compressor, and the refrigeration heat dissipation cycle is completed;

when the compressor operates for heating, the refrigerant flows into the indoor heat exchanger from the compressor for condensation, and then flows back to the compressor from the liquid pipe through the subcooler, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas-liquid separator, so that the heating and heat dissipation cycle is completed.

Further, the operation of partial outer machine circulation heat dissipation route includes:

and the circulating heat dissipation passage of the running outer machine and the circulating heat dissipation passage of the shutdown outer machine.

Further, the outer machine circulation heat dissipation route of operation includes:

the system comprises a compressor, an outdoor heat exchanger, a liquid pipe, a shutdown outer machine, a gas pipe and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the liquid pipe;

when the compressor operates for refrigeration, the refrigerant flows out of the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the liquid pipe, the shutdown outer machine, the gas pipe and the gas-liquid separator and then returns to the compressor;

when the compressor is operated for heating, the refrigerant flows out of the compressor, flows through the air pipe, the shutdown outer machine, the liquid pipe, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas-liquid separator and then returns to the compressor.

Further, the shutdown outer machine circulation heat dissipation path includes:

operating an external machine, an air pipe, an outdoor heat exchanger, a subcooler and a liquid pipe;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the subcooler;

when the running refrigeration is carried out, the refrigerant flows into the liquid pipe from the running external machine, flows through the subcooler, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas pipe and flows back to the running external machine;

when the air conditioner operates to heat, the refrigerant flows into the air pipe from the operating external unit, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the subcooler and the liquid pipe and flows back to the operating external unit.

Further, the refrigerant heat dissipation module includes:

photovoltaic inverter heat dissipation module and compressor drive plate heat dissipation module.

Further, the method also comprises the following steps:

and a first port of the three-way valve is connected with the photovoltaic inverter heat dissipation module, a second port of the three-way valve is connected with the gasoline separator, and a third port of the three-way valve is connected with the compressor drive plate heat dissipation module and used for switching the external circulation heat dissipation passage and the internal circulation heat dissipation passage.

Further, the switching the external circulation heat dissipation path and the internal circulation heat dissipation path includes:

when the first port and the second port of the three-way valve are communicated, the internal circulation heat dissipation passage is communicated;

and when the first port and the third port of the three-way valve are communicated, the external circulation heat dissipation passage is communicated.

Further, the photovoltaic inverter heat dissipation module is connected in series with the compressor drive board heat dissipation module, or the photovoltaic inverter heat dissipation module is connected in parallel with the compressor drive board heat dissipation module.

Further, the outdoor heat exchanger includes:

an upper heat exchanger and a lower heat exchanger;

when the photovoltaic inverter heat dissipation module is connected with the compressor drive plate heat dissipation module in parallel, the upper heat exchanger is connected with the photovoltaic inverter heat dissipation module, and the lower heat exchanger is connected with the compressor drive plate heat dissipation module.

Further, the method also comprises the following steps: a first heating electronic expansion valve and a second heating electronic expansion valve;

the first heating electronic expansion valve is connected with the upper heat exchanger and is used for throttling control of a refrigerant flowing out of the upper heat exchanger during operation and heating;

and the second heating electronic expansion valve is connected with the lower heat exchanger and is used for throttling control of the refrigerant flowing out of the lower heat exchanger during heating operation.

Further, the circulation heat dissipation path further includes:

and the refrigeration electronic expansion valve is used for throttling control of the refrigerant flowing out of the outdoor heat exchanger during refrigeration.

Further, when the outer unit is a plurality of, still include:

a first solenoid valve, a second solenoid valve and a third solenoid valve;

the first electromagnetic valve is used for controlling whether the lower heat exchanger is connected to the circulating heat dissipation passage or not;

the second electromagnetic valve is used for controlling whether the air pipe is communicated with the upper heat exchanger or not;

and the third electromagnetic valve is used for controlling whether the refrigerant heat dissipation module is communicated with the air pipe or not.

Further, when the outer machine is the stand-alone machine, still include:

a first solenoid valve;

the first electromagnetic valve is used for controlling whether the lower heat exchanger is connected to the circulating heat dissipation passage or not.

Further, the method also comprises the following steps: a fourth solenoid valve;

and the fourth electromagnetic valve is connected with the refrigeration electronic expansion valve in parallel and is used for bypassing the branch where the refrigeration electronic expansion valve is located.

Further, the temperature sensing bulb is arranged on the photovoltaic inverter heat dissipation module and used for detecting the temperature of the photovoltaic inverter.

Further, the fan is used for dissipating heat of the photovoltaic inverter when the temperature of the photovoltaic inverter is smaller than a preset threshold value.

Further, the photovoltaic inverter heat dissipation module includes:

one or more of a heat dissipation plate, a fin and a copper pipe.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the photovoltaic air conditioner heat dissipation system provided by the embodiment comprises a circulating heat dissipation passage and a refrigerant heat dissipation module arranged in the circulating heat dissipation passage, wherein the circulating heat dissipation passage comprises an outer circulating heat dissipation passage and an inner circulating heat dissipation passage; when the unit is shut down, the photovoltaic power generation heating module is cooled through the refrigerant cooling module arranged in the inner circulation cooling passage, so that the photovoltaic power generation heating module can be effectively cooled in an energy-saving manner no matter when the unit is operated or shut down, and the photovoltaic power generation heating module can still normally work when the unit is shut down.

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 application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a functional structure diagram of a photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to another embodiment of the present application.

Fig. 4 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 6 is a flowchart of another heat dissipation control method for a photovoltaic air conditioning heat dissipation system according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to another embodiment of the present application.

Fig. 8 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of another photovoltaic air-conditioning cooling system according to an embodiment of the present application.

Fig. 11 is a flowchart of a heat dissipation control method of a photovoltaic air conditioner heat dissipation system according to an embodiment of the present application.

Fig. 12 is a flowchart of a heat dissipation control method for a photovoltaic air conditioner heat dissipation system according to another embodiment of the present application.

Fig. 13 is a functional structure diagram of a heat dissipation control device of a photovoltaic air conditioner heat dissipation system according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a functional structure diagram of a photovoltaic air-conditioning cooling system according to an embodiment of the present application, and as shown in fig. 1, the photovoltaic air-conditioning cooling system includes:

the cooling system comprises a circulating heat dissipation passage 1 and a refrigerant heat dissipation module 2 arranged in the circulating heat dissipation passage 1;

the circulation heat dissipation passage 1 comprises an outer circulation heat dissipation passage 11 and an inner circulation heat dissipation passage 12;

when the unit operates, the photovoltaic power generation heating module is radiated through the refrigerant radiating module 2 arranged in the external circulation radiating passage 11;

when the unit is shut down, the photovoltaic power generation heating module is radiated through the refrigerant radiating module 2 arranged in the inner circulation radiating passage 12.

In the traditional photovoltaic air conditioning system, when the unit is shut down, the photovoltaic inverter module can still continue to operate, photovoltaic electric energy is continuously converted into available power for other equipment to use and store, the photovoltaic inverter module continuously generates heat in the process, and the temperature rise is possibly too high due to the fact that the air conditioning system is shut down and a fan cannot effectively dissipate heat because of the non-operation of the fan, and the normal work of the photovoltaic inverter and other photovoltaic power generation heating modules is influenced.

In this embodiment, the refrigerant heat dissipation module 2 is adjacent to the photovoltaic power generation heating module, when the unit is shut down, the operation of the internal unit in the unit is stopped, the refrigerant in the internal circulation heat dissipation passage 12 of the external unit flows in a circulation manner, and when the refrigerant flows through the refrigerant heat dissipation module 2, the photovoltaic power generation heating module can be dissipated through the refrigerant heat dissipation module 2.

In the embodiment, the photovoltaic air-conditioning heat dissipation system comprises a circulating heat dissipation passage and a refrigerant heat dissipation module arranged on the circulating heat dissipation passage, wherein the circulating heat dissipation passage comprises an outer circulating heat dissipation passage and an inner circulating heat dissipation passage; when the unit is shut down, the photovoltaic power generation heating module is cooled through the refrigerant cooling module arranged in the inner circulation cooling passage, so that the photovoltaic power generation heating module can be effectively cooled in an energy-saving manner no matter when the unit is operated or shut down, and the photovoltaic power generation heating module can still normally work when the unit is shut down.

Fig. 2 is a schematic structural view of a photovoltaic air-conditioning cooling system according to an embodiment of the present application, and as shown in fig. 2, when a unit includes a plurality of external units, the photovoltaic air-conditioning cooling system includes:

each outdoor unit internally comprises a compressor 201, an oil separator 202, an outdoor heat exchanger 203, a refrigerant heat dissipation module, a subcooler 204, a liquid pipe 205, a gas pipe 206 and a gas-liquid separator 207;

the refrigerant heat dissipation module includes:

a photovoltaic inverter heat sink module 208 and a compressor drive board heat sink module 209.

The photovoltaic inverter heat sink module 208 is connected in series with the compressor drive board heat sink module 209.

In some embodiments, the pv inverter heatsink module 208 includes:

one or more of a heat dissipation plate, a fin and a copper pipe.

In some embodiments, the pv inverter heat dissipation module is located behind the pv inverter electronics box proximate to the pv inverter electronics box.

The three-way valve 210 is connected with the photovoltaic inverter heat dissipation module 208 through a first port, the gasoline separator 207 through a second port, and the compressor driving board heat dissipation module 209 through a third port, and is used for switching an external circulation heat dissipation passage and an internal circulation heat dissipation passage.

In some embodiments, the means for switching the outer circulation heat dissipation path and the inner circulation heat dissipation path comprises:

when the first port and the second port of the three-way valve are communicated, the internal circulation heat dissipation passage is communicated;

when the first port and the third port of the three-way valve are communicated, the external circulation heat dissipation passage is communicated.

The outdoor heat exchanger 203 includes:

an upper heat exchanger 2031 and a lower heat exchanger 2032;

in some embodiments, further comprising: a first heating electronic expansion valve 211 and a second heating electronic expansion valve 212;

the first heating electronic expansion valve 211 is connected to the upper heat exchanger 2031, and is configured to throttle the refrigerant flowing out of the upper heat exchanger 2031 during heating operation;

the second heating electronic expansion valve 212 is connected to the lower heat exchanger 2032, and is configured to throttle the refrigerant flowing out of the lower heat exchanger 2032 during heating operation.

And a refrigeration electronic expansion valve 213 for throttling the refrigerant flowing out of the outdoor heat exchanger 203 during refrigeration operation.

In some embodiments, further comprising:

a first solenoid valve 214, a second solenoid valve 215, and a third solenoid valve 216;

the first electromagnetic valve 214 is used for controlling whether the lower heat exchanger 2032 is connected to the circulating heat dissipation passage;

the second solenoid valve 215 is used for controlling whether the air pipe 206 is communicated with the upper heat exchanger 2031;

the third solenoid valve 216 is used to control whether the refrigerant heat dissipation module is communicated with the air pipe 206.

And the fourth solenoid valve 217, the fourth solenoid valve 217 being connected in parallel with the refrigeration electronic expansion valve 213, for bypassing the branch in which the refrigeration electronic expansion valve 213 is located.

Fig. 3 is a schematic structural diagram of a photovoltaic air conditioner heat dissipation system according to another embodiment of the present application, as shown in fig. 3, when a photovoltaic inverter is in an operating state and a unit is in a shutdown state, an indoor unit is not in operation, at this time, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve are all closed, a first heating electronic expansion valve is opened, a second heating electronic expansion valve is closed, a cooling electronic expansion valve is opened, a three-way valve (i → ii) is connected, and heat dissipation is performed through a photovoltaic inverter heat dissipation module, where the internal circulation heat dissipation path includes:

a compressor, an outdoor heat exchanger and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the gas-liquid separator;

the refrigerant flows from the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module and the gas-liquid separator and then returns to the compressor.

And the refrigeration electronic expansion valve is used for adjusting the opening degree to control the temperature of the throttled refrigerant.

For example, the opening degree is adjusted by a refrigeration electronic expansion valve, and the temperature of the throttled refrigerant is controlled to be higher than the dew point temperature, so that condensed water is prevented from being generated inside the electric appliance box when the refrigerant dissipates heat.

In this embodiment, the internal circulation heat dissipation path can dissipate heat of the photovoltaic power generation heat dissipation modules such as the photovoltaic inverter and the like in a manner that the refrigerant circulates in the external machine when the unit is in a shutdown state, so as to ensure that the photovoltaic power generation heat dissipation modules work normally.

Fig. 4 is a schematic structural diagram of a photovoltaic air-conditioning heat dissipation system according to another embodiment of the present application, as shown in fig. 4, when a photovoltaic inverter is in an operating state and a unit of the photovoltaic air-conditioning heat dissipation system is in a normal operating state, a compressor and a fan operate normally, at this time, a first electromagnetic valve is opened, a second electromagnetic valve is closed, a third electromagnetic valve is closed, a fourth electromagnetic valve is opened, a first heating electronic expansion valve and a second heating electronic expansion valve are opened, a cooling electronic expansion valve is closed, all external unit operation circulation heat dissipation paths are connected, and all external unit operation circulation heat dissipation paths include:

the system comprises a compressor, an outdoor heat exchanger, a subcooler, a liquid pipe, an indoor heat exchanger, an air pipe and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the subcooler;

when the refrigeration is operated, the refrigerant flows out of the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the subcooler and the liquid pipe, enters the indoor heat exchanger for evaporation, flows through the gas-liquid separator from the gas pipe and flows back to the compressor, and the refrigeration heat dissipation cycle is completed;

when the compressor operates for heating, the refrigerant flows into the indoor heat exchanger from the compressor for condensation, and then flows back to the compressor from the liquid pipe through the subcooler, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas-liquid separator, so that the heating and heat dissipation cycle is completed.

The refrigerant heat dissipation module comprises a photovoltaic inverter heat dissipation module and a compressor drive plate heat dissipation module, and the photovoltaic inverter heat dissipation module and the compressor drive plate heat dissipation module are connected in series in the external circulation heat dissipation passage.

In this embodiment, through the circulation heat dissipation path of all outer machines, the effective heat dissipation of the photovoltaic inverter can be realized when all outer machines normally operate, and the normal operation of the photovoltaic power generation heating module is ensured.

Fig. 5 is a schematic structural diagram of a photovoltaic air-conditioning cooling system according to another embodiment of the present application, and as shown in fig. 5, when a photovoltaic inverter is in an operating state and a unit of the photovoltaic air-conditioning cooling system is in a shutdown state, and when other external unit modules of the unit normally operate, a part of external unit operation circulation cooling paths are connected, where the part of external unit operation circulation cooling paths includes: and the circulating heat dissipation passage of the running outer machine and the circulating heat dissipation passage of the shutdown outer machine.

The outer machine circulation heat dissipation route of operation includes:

the system comprises a compressor, an outdoor heat exchanger, a liquid pipe, a shutdown outer machine, a gas pipe and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the liquid pipe;

when the compressor operates for refrigeration, the refrigerant flows out of the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the liquid pipe, the shutdown outer machine, the gas pipe and the gas-liquid separator and then returns to the compressor;

when the compressor is operated for heating, the refrigerant flows out of the compressor, flows through the air pipe, the shutdown outer machine, the liquid pipe, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas-liquid separator and then returns to the compressor.

Shut down outer quick-witted circulation heat dissipation route, include:

operating an external machine, an air pipe, an outdoor heat exchanger, a subcooler and a liquid pipe;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the subcooler;

when the running refrigeration is carried out, the refrigerant flows into the liquid pipe from the running external machine, flows through the subcooler, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas pipe and flows back to the running external machine;

when the air conditioner operates to heat, the refrigerant flows into the air pipe from the operating external unit, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the subcooler and the liquid pipe and flows back to the operating external unit.

When the refrigeration unit operates for refrigeration, the first electromagnetic valve is closed, the second electromagnetic valve is closed, the third electromagnetic valve is opened, the fourth electromagnetic valve is opened, the first heating electronic expansion valve, the second heating electronic expansion valve and the refrigeration electronic expansion valve are all closed, the three-way valve → the third electromagnetic valve is communicated, a refrigerant enters the unit through a liquid pipe, passes through the subcooler and the compressor drive plate heat dissipation module, enters the photovoltaic inverter heat dissipation module through the three-way valve, dissipates heat of the photovoltaic inverter, and the evaporated refrigerant enters the air pipe through the fourth electromagnetic valve and the third electromagnetic valve one by one and converges to the system main air pipe to return to the compressor of the operation unit to complete the refrigeration heat dissipation cycle.

When the air conditioner runs for heating, the first electromagnetic valve is closed, the second electromagnetic valve is opened, the third electromagnetic valve is closed, the fourth electromagnetic valve is closed, the first heating electronic expansion valve is opened, the second heating electronic expansion valve is closed, the refrigerating electronic expansion valve is opened, the three-way valve → the third electromagnetic valve is connected, a refrigerant enters an air pipe of the shutdown unit from the main air pipe, flows through the upper heat exchanger through the main four-way valve and the second electromagnetic valve for condensation, is throttled by the refrigerating electronic expansion valve, is subjected to heat dissipation and evaporation by the photovoltaic inverter module, passes through the three-way valve → the third electromagnetic valve, drives the IPM module and the subcooler through the compressor, returns to a main liquid pipe of the system from a liquid pipe, returns to the low-pressure side of the running outdoor unit, and completes heating and heat dissipation circulation.

In this embodiment, through the outer quick-witted circulation heat dissipation passageway of operation outer and the outer quick-witted circulation heat dissipation passageway of shutting down can realize dispelling the heat and effectively dispelling the heat to the outer machine of shutting down to the outer machine of operation and can realize energy-conservation under the outer machine is a plurality of and only partial outer machine normal operating's the condition.

Fig. 6 is a schematic structural view of a photovoltaic air-conditioning cooling system according to an embodiment of the present application, and as shown in fig. 6, when a unit is a single unit, the photovoltaic air-conditioning cooling system includes:

the system comprises a compressor, an oil separator, an outdoor heat exchanger, a refrigerant heat dissipation module, a subcooler, a liquid pipe, an air pipe and a gas-liquid separator;

the refrigerant heat dissipation module includes:

photovoltaic inverter heat dissipation module and compressor drive plate heat dissipation module.

The photovoltaic inverter heat dissipation module is connected with the compressor driving plate heat dissipation module in series.

And a first port of the three-way valve is connected with the photovoltaic inverter heat dissipation module, a second port of the three-way valve is connected with the gasoline separator, and a third port of the three-way valve is connected with the compressor driving plate heat dissipation module and used for switching the external circulation heat dissipation passage and the internal circulation heat dissipation passage.

In some embodiments, the means for switching the outer circulation heat dissipation path and the inner circulation heat dissipation path comprises:

when the first port and the second port of the three-way valve are communicated, the internal circulation heat dissipation passage is communicated;

when the first port and the third port of the three-way valve are communicated, the external circulation heat dissipation passage is communicated.

The outdoor heat exchanger includes:

an upper heat exchanger and a lower heat exchanger;

a first heating electronic expansion valve and a second heating electronic expansion valve;

the first heating electronic expansion valve is connected with the upper heat exchanger and used for throttling control over a refrigerant flowing out of the upper heat exchanger during heating operation;

the second heating electronic expansion valve is connected with the lower heat exchanger and used for throttling control over the refrigerant flowing out of the lower heat exchanger during heating operation.

And the refrigeration electronic expansion valve is used for performing throttling control on the refrigerant flowing out of the outdoor heat exchanger during operation and refrigeration.

A first solenoid valve;

the first electromagnetic valve is used for controlling whether the lower heat exchanger is connected to the circulating heat dissipation passage or not.

And the fourth electromagnetic valve is connected with the refrigeration electronic expansion valve in parallel and is used for bypassing the branch where the refrigeration electronic expansion valve is located.

Fig. 7 is a schematic structural diagram of a photovoltaic air-conditioning heat dissipation system according to an embodiment of the present application, where as shown in fig. 7, a unit includes a plurality of external units, a photovoltaic inverter heat dissipation module is connected in parallel with a compressor drive board heat dissipation module, and all external units operate a circulation heat dissipation path including:

when the photovoltaic inverter heat dissipation module is connected with the compressor drive plate heat dissipation module in parallel, the upper heat exchanger is connected with the photovoltaic inverter heat dissipation module, and the lower heat exchanger is connected with the compressor drive plate heat dissipation module.

The first electromagnetic valve is opened, the second electromagnetic valve is closed, the third electromagnetic valve is closed, the fourth electromagnetic valve is opened, the first heating electronic expansion valve is opened, the second heating electronic expansion valve is opened, the refrigeration electronic expansion valve is closed, the three-way valve (I → III) is communicated, and the refrigerant flows in the following directions:

when refrigeration is operated: high-temperature and high-pressure refrigerant flows out of the compressor, flows into the upper heat exchanger and the lower heat exchanger of the outdoor unit through the four-way valve, is condensed, and then flows out of the upper heat exchanger, enters the photovoltaic inverter heat dissipation module through the first heating electronic expansion valve and the fourth electromagnetic valve, and dissipates heat for the photovoltaic inverter. The refrigerant flowing out of the lower heat exchanger passes through the compressor drive plate heat dissipation module. The upper and lower two paths of refrigerants converge in front of the subcooler, pass through the subcooler, enter the inner machine through the liquid pipe to be evaporated, and return to the steam separator from the gas pipe to complete the refrigeration cycle.

When heating is carried out: the high-temperature and high-pressure refrigerant is discharged from the compressor, directly enters the indoor unit through the four-way valve for heat exchange and condensation, flows back to the outdoor unit through the liquid pipe, is distributed to the photovoltaic inverter heat dissipation module and the compressor drive plate heat dissipation module after passing through the cooler for heat dissipation, then enters the outdoor heat exchanger for evaporation through the first heating electronic expansion valve and the second heating electronic expansion valve for convergence, and finally returns to the steam branch to complete the heating cycle.

Fig. 8 is a schematic structural diagram of a photovoltaic air-conditioning heat dissipation system according to an embodiment of the present application, where as shown in fig. 8, a unit includes a plurality of external units, a photovoltaic inverter heat dissipation module is connected in parallel with a compressor drive board heat dissipation module, and a part of external unit operation circulation heat dissipation paths include:

when the outdoor unit is operated for refrigeration, the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are closed, the third electromagnetic valve is opened, the first heating electronic expansion valve, the second heating electronic expansion valve and the refrigeration electronic expansion valve are all closed, and the three-way valve is connected → communicated. The system refrigerant enters the unit through a liquid pipe, passes through the subcooler and then enters the photovoltaic inverter heat dissipation module through the three-way valve to dissipate heat of the photovoltaic inverter. And the refrigerant after heat dissipation and evaporation enters the air pipe through the third electromagnetic valve, converges into the main air pipe of the system and returns to the running unit compressor to complete circulation.

When the external machine is operated for heating, the valves of the unit execute the following actions: opening the first electromagnetic valve, opening the electromagnetic valve, closing the third electromagnetic valve, opening the electromagnetic valve, closing the first heating electronic expansion valve and the second heating electronic expansion valve, closing the refrigerating electronic expansion valve, and connecting the three-way valve → the third valve. High-temperature and high-pressure refrigerant enters an air pipe of the unit from a main air pipe of the system, passes through a main four-way valve and a second electromagnetic valve, enters an upper heat exchanger for condensation, and enters a photovoltaic inverter module through a fourth electromagnetic valve to dissipate heat of the photovoltaic inverter; the cooled refrigerant flows through the three-way valve and the subcooler, then converges to the main system liquid pipe from the liquid pipe, and returns to the running compressor, thus completing the circulation.

Fig. 9 is a schematic structural diagram of a photovoltaic air conditioner heat dissipation system according to an embodiment of the present application, where as shown in fig. 9, a unit includes a plurality of external units, a photovoltaic inverter heat dissipation module is connected in parallel with a compressor drive board heat dissipation module, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, and a fourth electromagnetic valve are all closed, a first heating electronic expansion valve is opened, a second heating electronic expansion valve is closed, a refrigerating electronic expansion valve is opened, and a three-way valve → two is connected. And a compressor and a fan of the system run at low frequency.

The flow direction of the refrigerant of the internal circulation heat dissipation channel is as follows:

high-temperature and high-pressure refrigerant flows out of the compressor, flows into an upper condenser through the oil component and the main four-way valve for condensation, and enters the photovoltaic inverter heat dissipation module after being throttled by the refrigeration electronic expansion valve to dissipate heat for the photovoltaic module, wherein the inverter heat dissipation module is equivalent to an evaporator in a system. The evaporated refrigerant enters the steam separator through the three-way valve I → II and then returns to the compressor, and the internal circulation of the external machine is completed.

Fig. 10 is a schematic structural view of a photovoltaic air-conditioning cooling system according to an embodiment of the present application, and as shown in fig. 10, when a unit includes an external unit, the photovoltaic air-conditioning cooling system includes:

the system comprises a compressor, an oil separator, an outdoor heat exchanger, a refrigerant heat dissipation module, a subcooler, a liquid pipe, an air pipe and a gas-liquid separator;

the refrigerant heat dissipation module includes:

photovoltaic inverter heat dissipation module and compressor drive plate heat dissipation module.

The photovoltaic inverter heat dissipation module is connected with the compressor driving plate heat dissipation module in parallel.

And a first port of the three-way valve is connected with the photovoltaic inverter heat dissipation module, a second port of the three-way valve is connected with the gasoline separator, and a third port of the three-way valve is connected with the compressor driving plate heat dissipation module and used for switching the external circulation heat dissipation passage and the internal circulation heat dissipation passage.

In some embodiments, the means for switching the outer circulation heat dissipation path and the inner circulation heat dissipation path comprises:

when the first port and the second port of the three-way valve are communicated, the internal circulation heat dissipation passage is communicated;

when the first port and the third port of the three-way valve are communicated, the external circulation heat dissipation passage is communicated.

The outdoor heat exchanger includes:

an upper heat exchanger and a lower heat exchanger;

a first heating electronic expansion valve and a second heating electronic expansion valve;

the first heating electronic expansion valve is connected with the upper heat exchanger and used for throttling control over a refrigerant flowing out of the upper heat exchanger during heating operation;

the second heating electronic expansion valve is connected with the lower heat exchanger and used for throttling control over the refrigerant flowing out of the lower heat exchanger during heating operation.

And the refrigeration electronic expansion valve is used for performing throttling control on the refrigerant flowing out of the outdoor heat exchanger during operation and refrigeration.

A first solenoid valve;

the first electromagnetic valve is used for controlling whether the lower heat exchanger is connected to the circulating heat dissipation passage or not.

And the fourth electromagnetic valve is connected with the refrigeration electronic expansion valve in parallel and is used for bypassing the branch where the refrigeration electronic expansion valve is located.

In some embodiments, further comprising:

and the temperature sensing bulb is arranged on the photovoltaic inverter heat dissipation module and used for acquiring the temperature of the photovoltaic inverter.

The fan is used for dissipating heat of the photovoltaic inverter when the temperature of the photovoltaic inverter is smaller than or equal to a preset threshold value.

In the embodiment, different control methods exist in different states of the photovoltaic multi-split air conditioning system module through logic control, and the photovoltaic inverter is effectively and energy-saving cooled through combination of air cooling and refrigerant cooling and matching of internal circulation and external circulation.

Fig. 11 is a flowchart of a heat dissipation control method of a photovoltaic air-conditioning heat dissipation system according to an embodiment of the present application, and as shown in fig. 11, the heat dissipation control method of the photovoltaic air-conditioning heat dissipation system includes:

s111: when the photovoltaic inverter normally works, detecting the working state of a unit where the photovoltaic inverter is located, wherein the working state of the unit comprises unit operation and unit shutdown;

s112: when the unit operates, the refrigerant heat dissipation module arranged in the external circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module;

s113: when the unit is shut down, the refrigerant heat dissipation module arranged in the inner circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module.

In this embodiment, when the unit operates, the refrigerant heat dissipation module disposed in the external circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module; when the unit is shut down, the refrigerant heat dissipation module arranged in the inner circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module, so that the photovoltaic power generation heating modules such as the photovoltaic inverter can be effectively dissipated in an energy-saving manner no matter the unit is normally operated or shut down, and the photovoltaic power generation heating module can still normally work when the unit is shut down.

Fig. 12 is a flowchart of a heat dissipation control method for a photovoltaic air-conditioning heat dissipation system according to an embodiment of the present application, and as shown in fig. 12, the heat dissipation control method for the photovoltaic air-conditioning heat dissipation system includes:

s121: detecting whether the photovoltaic inverter of the local unit normally operates;

s122: if yes, detecting whether the unit normally operates;

s123: otherwise, the system maintains the current working state;

s124: if the unit normally operates, all the external unit operation circulating heat dissipation paths are connected;

the whole outer quick-witted operation circulation heat dissipation route of switch-on specifically includes:

controlling the first electromagnetic valve to be opened, the second electromagnetic valve to be closed, the third electromagnetic valve to be closed, the fourth electromagnetic valve to be opened, the first heating electronic expansion valve to be opened, the second heating electronic expansion valve to be opened and the refrigerating electronic expansion valve to be closed;

controlling a three-way valve to be communicated with the first port and the third port;

when the compressor operates for refrigeration, a refrigerant flows out of the compressor, flows through the upper heat exchanger and the lower heat exchanger for condensation, passes through the first heating electronic expansion valve, the second heating electronic expansion valve and the fourth electromagnetic valve, passes through the photovoltaic inverter heat dissipation module, the compression driving IPM heat dissipation module and the subcooler, flows into the liquid pipe, enters the indoor heat exchanger for evaporation, returns to the gasoline separator from the air pipe, and then returns to the compressor, so that the refrigeration and heat dissipation cycle is completed;

when the compressor operates for heating, the refrigerant flows out of the compressor, enters the indoor heat exchanger for condensation, then flows back to the subcooler through the liquid pipe, flows through the compressor to drive the IPM module for heat dissipation and the photovoltaic inverter heat dissipation module, enters the outdoor heat exchanger for evaporation through the fourth electromagnetic valve, enters the gasoline separator and then returns to the compressor, and the heating and heat dissipation cycle is completed.

S125: otherwise, detecting whether other external machines in the machine set normally operate;

s126: if yes, connecting part of the external unit operation circulation heat dissipation passage;

the outer quick-witted operation circulation heat dissipation route of switch-on part specifically includes:

when photovoltaic inverter heat dissipation module and compressor drive plate heat dissipation module series connection, the outer quick-witted operation circulation heat dissipation route of switch-on part includes:

when the refrigeration is operated, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be closed, the third electromagnetic valve is controlled to be opened, the fourth electromagnetic valve is controlled to be opened, and the first heating electronic expansion valve, the second heating electronic expansion valve and the refrigeration electronic expansion valve are all closed;

the three-way valve is controlled to select the first port to be communicated with the third port;

when the air conditioner runs for heating, the first electromagnetic valve is controlled to be closed, the second electromagnetic valve is controlled to be opened, the third electromagnetic valve is controlled to be closed, the fourth electromagnetic valve is controlled to be closed, the first heating electronic expansion valve is controlled to be opened, the second heating electronic expansion valve is controlled to be closed, and the refrigerating electronic expansion valve is controlled to be opened;

the first port and the third port of the control three-way valve are communicated.

When photovoltaic inverter heat dissipation module and compressor drive plate heat dissipation module parallel connection, the outer quick-witted operation circulation heat dissipation route of switch-on part includes:

when the refrigeration is operated, the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are controlled to be closed, and the third electromagnetic valve is controlled to be opened;

controlling the first heating electronic expansion valve, the second heating electronic expansion valve and the refrigerating electronic expansion valve to be closed;

controlling the first port and the third port of the three-way valve to be communicated;

when the heating operation is carried out, the first electromagnetic valve is controlled to be opened, the second electromagnetic valve is controlled to be opened, the third electromagnetic valve is controlled to be closed, the fourth electromagnetic valve is controlled to be opened, and the first heating electronic expansion valve, the second heating electronic expansion valve and the refrigerating electronic expansion valve are all closed;

the first port and the third port of the control three-way valve are communicated.

In some embodiments, the connecting part of the external unit operation circulation heat dissipation path further includes:

acquiring the temperature of the photovoltaic inverter, an environmental temperature value and a system low-voltage value;

and controlling the working frequency of the fan according to the environmental temperature value and the low pressure value of the system.

The actual capacity requirement Qa of the running external unit is Qn k1, where Qn is the capacity requirement of the internal unit, and k1 is the corrected value of the heat dissipation module

k1 ═ 1+ nk (n ═ the number of out-machine shutdowns with the photovoltaic module in the operating state, k is the correction factor)

The external fan of the unit operates according to the table 1

TABLE 1 frequency comparison table for external fan when part of external unit is connected to circulating heat dissipation path

For example, take d1 ═ 8 ℃; t1 ═ 60 ℃, T2 ═ 80 ℃, F1 ═ 20Hz, F2 ═ 30Hz, and F3 ═ 40 Hz.

S127: otherwise, starting air cooling heat dissipation or connecting the internal circulation heat dissipation passage for heat dissipation.

In some embodiments, before the internal circulation heat dissipation path is connected for heat dissipation, the method further includes:

the method comprises the steps of obtaining the temperature of a photovoltaic inverter, and controlling a fan to dissipate heat when the ambient temperature is less than or equal to a preset threshold value;

and detecting the running state of an external machine of the unit where the photovoltaic inverter is located when the ambient temperature is greater than a preset threshold value.

In some embodiments, controlling the fan to dissipate heat when the ambient temperature is less than or equal to a preset threshold includes:

and controlling the fan to radiate according to the corresponding relation between the preset temperature range and the fan frequency.

If the temperature of the detection electric box is T: when T is less than or equal to T1 ℃, entering an air cooling heat dissipation mode, and operating an outer fan according to the following table 2:

table 2 running frequency comparison table for external fan in air cooling heat radiation mode

For example: t2 > T1, F3 > F2 > F1, for example, T1 ═ 60 ℃, T ═ 45 ℃, T1 ═ 10 ℃, T2 ═ 30 ℃, F1 ═ 20Hz, F2 ═ 30Hz, and F3 ═ 40 Hz.

When T is more than T1 ℃, the external machine is communicated with the internal circulation heat dissipation passage to dissipate heat.

In some embodiments, dissipating heat through the internal circulation heat dissipation path comprises:

controlling the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve to be closed;

controlling the first heating electronic expansion valve to be opened, the second heating electronic expansion valve to be closed and the refrigerating electronic expansion valve to be opened;

the first port and the second port of the control three-way valve are communicated.

In some embodiments, the heat dissipation is performed through an internal circulation heat dissipation path, further comprising:

the compressor and the fan are controlled to operate at preset low frequency values as shown in table 3.

TABLE 3 comparison table for compressor and fan with internal circulation heat dissipation path

For example, T2-80, G0-15, G1-20, G2-30, and G3-50 are taken.

In some embodiments, further comprising:

when the photovoltaic inverter is in a shutdown or standby state:

and controlling the fourth electromagnetic valve to be opened to maintain the current running state of the external machine.

In the embodiment, the unit is enabled to effectively combine air-cooled heat dissipation and refrigerant heat dissipation under different states to dissipate heat for the photovoltaic inverter module or the compressor driving IPM module, so that the system reliability is effectively protected and energy is saved as much as possible; when the unit is shut down, the internal circulation heat dissipation passage can be connected, so that the photovoltaic inverter can effectively dissipate heat; in the multi-split system, the photovoltaic inverter is in a working state, and when an external machine of the multi-split system stops, refrigerant circulation heat dissipation can be completed by means of the running external machine.

Fig. 13 is a functional structure diagram of a heat dissipation control device of a photovoltaic air-conditioning heat dissipation system according to an embodiment of the present application, and as shown in fig. 13, the heat dissipation control device of the photovoltaic air-conditioning heat dissipation system includes:

the detection module 131 is configured to detect a working state of a unit where the photovoltaic inverter is located when the photovoltaic inverter normally works, where the working state of the unit includes unit operation and unit shutdown;

the first heat dissipation module 132 is used for dissipating heat of the photovoltaic power generation heating module through the refrigerant heat dissipation module arranged in the external circulation heat dissipation passage when the unit operates;

and the second heat dissipation module 133 is configured to dissipate heat of the photovoltaic power generation heating module through the refrigerant heat dissipation module disposed in the inner circulation heat dissipation path when the unit is turned off.

In this embodiment, when the photovoltaic inverter normally works, the detection module detects the running state of an external machine of a unit where the photovoltaic inverter is located, the first heat dissipation module dissipates heat through the external circulation heat dissipation passage when the unit runs, and the second heat dissipation module dissipates heat through the internal circulation heat dissipation passage when the unit is shut down.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can derive other products in various forms without departing from the scope of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present application.

Claims (20)

1. The utility model provides a photovoltaic air conditioner cooling system which characterized in that includes:

the cooling system comprises a circulating heat dissipation passage and a refrigerant heat dissipation module arranged in the circulating heat dissipation passage;

the circulating heat dissipation passage comprises an external circulating heat dissipation passage and an internal circulating heat dissipation passage;

when the unit operates, the refrigerant heat dissipation module arranged in the external circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module;

when the unit is shut down, the refrigerant heat dissipation module arranged in the internal circulation heat dissipation passage dissipates heat to the photovoltaic power generation heating module.

2. The photovoltaic air conditioning heat dissipation system of claim 1, wherein the internal circulation heat dissipation path comprises:

a compressor, an outdoor heat exchanger and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the gas-liquid separator;

the refrigerant flows from the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module and the gas-liquid separator and then returns to the compressor.

3. The photovoltaic air conditioning heat dissipation system of claim 1, wherein the outer circulation heat dissipation path comprises:

all the external units operate the circulating heat dissipation passage and part of the external units operate the circulating heat dissipation passage.

4. The photovoltaic air-conditioning heat dissipation system of claim 3, wherein the total outdoor unit operation circulation heat dissipation path comprises:

the system comprises a compressor, an outdoor heat exchanger, a subcooler, a liquid pipe, an indoor heat exchanger, an air pipe and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the subcooler;

when the refrigeration is operated, the refrigerant flows out of the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the subcooler and the liquid pipe, enters the indoor heat exchanger for evaporation, flows through the gas-liquid separator from the gas pipe and flows back to the compressor, and the refrigeration heat dissipation cycle is completed;

when the compressor operates for heating, the refrigerant flows into the indoor heat exchanger from the compressor for condensation, and then flows back to the compressor from the liquid pipe through the subcooler, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas-liquid separator, so that the heating and heat dissipation cycle is completed.

5. The photovoltaic air conditioning cooling system of claim 3, wherein the partially outdoor unit operates a circulating cooling path comprising:

and the circulating heat dissipation passage of the running outer machine and the circulating heat dissipation passage of the shutdown outer machine.

6. The photovoltaic air conditioning heat dissipation system of claim 5, wherein the operating outdoor unit circulation heat dissipation path comprises:

the system comprises a compressor, an outdoor heat exchanger, a liquid pipe, a shutdown outer machine, a gas pipe and a gas-liquid separator;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the liquid pipe;

when the compressor operates for refrigeration, the refrigerant flows out of the compressor, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the liquid pipe, the shutdown outer machine, the gas pipe and the gas-liquid separator and then returns to the compressor;

when the compressor is operated for heating, the refrigerant flows out of the compressor, flows through the air pipe, the shutdown outer machine, the liquid pipe, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas-liquid separator and then returns to the compressor.

7. The photovoltaic air conditioning heat dissipation system of claim 5, wherein the shutdown outer machine circulation heat dissipation path comprises:

operating an external machine, an air pipe, an outdoor heat exchanger, a subcooler and a liquid pipe;

the refrigerant heat dissipation module is arranged between the outdoor heat exchanger and the subcooler;

when the running refrigeration is carried out, the refrigerant flows into the liquid pipe from the running external machine, flows through the subcooler, the refrigerant heat dissipation module, the outdoor heat exchanger and the gas pipe and flows back to the running external machine;

when the air conditioner operates to heat, the refrigerant flows into the air pipe from the operating external unit, flows through the outdoor heat exchanger, the refrigerant heat dissipation module, the subcooler and the liquid pipe and flows back to the operating external unit.

8. The pv air conditioning heat dissipation system of claim 1, wherein the coolant heat dissipation module comprises:

photovoltaic inverter heat dissipation module and compressor drive plate heat dissipation module.

9. The photovoltaic air conditioning heat dissipation system of claim 8, further comprising:

and a first port of the three-way valve is connected with the photovoltaic inverter heat dissipation module, a second port of the three-way valve is connected with the gasoline separator, and a third port of the three-way valve is connected with the compressor drive plate heat dissipation module and used for switching the external circulation heat dissipation passage and the internal circulation heat dissipation passage.

10. The pv air conditioning heat dissipation system of claim 9, wherein the means for switching between the outer and inner circulation heat dissipation paths comprises:

when the first port and the second port of the three-way valve are communicated, the internal circulation heat dissipation passage is communicated;

and when the first port and the third port of the three-way valve are communicated, the external circulation heat dissipation passage is communicated.

11. The photovoltaic air conditioning heat dissipation system of claim 8,

the photovoltaic inverter heat dissipation module is connected with the compressor drive plate heat dissipation module in series, or the photovoltaic inverter heat dissipation module is connected with the compressor drive plate heat dissipation module in parallel.

12. The photovoltaic air conditioning heat dissipation system of claim 11, wherein the outdoor heat exchanger comprises:

an upper heat exchanger and a lower heat exchanger;

when the photovoltaic inverter heat dissipation module is connected with the compressor drive plate heat dissipation module in parallel, the upper heat exchanger is connected with the photovoltaic inverter heat dissipation module, and the lower heat exchanger is connected with the compressor drive plate heat dissipation module.

13. The photovoltaic air conditioning heat dissipation system of claim 12, further comprising:

a first heating electronic expansion valve and a second heating electronic expansion valve;

the first heating electronic expansion valve is connected with the upper heat exchanger and is used for throttling control of a refrigerant flowing out of the upper heat exchanger during operation and heating;

and the second heating electronic expansion valve is connected with the lower heat exchanger and is used for throttling control of the refrigerant flowing out of the lower heat exchanger during heating operation.

14. The photovoltaic air conditioning heat dissipation system of claim 12, wherein the circulating heat dissipation path further comprises:

and the refrigeration electronic expansion valve is used for throttling control of the refrigerant flowing out of the outdoor heat exchanger during refrigeration.

15. The pv air conditioning heat dissipating system of claim 12, wherein when there are a plurality of external units, the pv air conditioning heat dissipating system further comprises:

a first solenoid valve, a second solenoid valve and a third solenoid valve;

the first electromagnetic valve is used for controlling whether the lower heat exchanger is connected to the circulating heat dissipation passage or not;

the second electromagnetic valve is used for controlling whether the air pipe is communicated with the upper heat exchanger or not;

and the third electromagnetic valve is used for controlling whether the refrigerant heat dissipation module is communicated with the air pipe or not.

16. The photovoltaic air conditioning cooling system of claim 12, further comprising, when the external unit is a single unit:

a first solenoid valve;

the first electromagnetic valve is used for controlling whether the lower heat exchanger is connected to the circulating heat dissipation passage or not.

17. The photovoltaic air conditioning heat dissipation system of claim 14, further comprising:

a fourth solenoid valve;

and the fourth electromagnetic valve is connected with the refrigeration electronic expansion valve in parallel and is used for bypassing the branch where the refrigeration electronic expansion valve is located.

18. The photovoltaic air conditioning heat dissipation system of claim 8, further comprising:

the temperature sensing bulb is arranged on the photovoltaic inverter heat dissipation module and used for detecting the temperature of the photovoltaic inverter.

19. The photovoltaic air conditioning heat dissipation system of claim 18, further comprising:

the fan is used for dissipating heat of the photovoltaic inverter when the temperature of the photovoltaic inverter is smaller than or equal to a preset threshold value.

20. The pv air conditioning heat dissipation system of claim 8, wherein the pv inverter heat dissipation module comprises:

one or more of a heat dissipation plate, a fin and a copper pipe.

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