CN209857479U - Refrigeration house refrigerating system based on solar PV/T technology - Google Patents

Abstract

The utility model discloses a cold storage refrigeration system based on solar PV/T technology, comprising a solar PV/T system, a refrigeration cycle system and a defrosting system used for defrosting the refrigeration cycle system; the solar PV/T system outputs electric energy supply Refrigeration cycle system; the refrigeration cycle system is equipped with several defrosting pipelines, the solar PV/T system is equipped with a heat collector, and the heat collector outputs the defrosting medium for transferring heat energy to the defrosting pipeline through the defrosting system; The frost medium returns to the collector after flowing through the defrosting pipeline. The utility model uses the low-temperature medium after defrosting to reduce the temperature of the solar PV/T board, improves the power generation efficiency of the solar PV/T board, uses the heat generated by the solar PV/T board to defrost, and can save the cost of electricity defrosting. The consumption of electric energy improves the utilization rate of solar energy.

Description

A cold storage refrigeration system based on solar PV/T technology

technical field

The utility model relates to a cold storage refrigeration system, in particular to a cold storage refrigeration system based on solar PV/T technology.

Background technique

At present, energy and environmental issues have become the main issues restricting the development of human society. Energy conservation and environmental protection are powerful guarantees for promoting economic development and harmonious coexistence between man and nature. With the improvement of people's living standards and the pursuit of a better life, the demand for fresh food is increasing, which promotes the rapid development of the cold chain system. As the infrastructure of the cold chain system, the number and energy consumption of cold storage are increasing rapidly year by year. It is of great significance to effectively reduce and solve the energy consumption of the cold storage system. On the other hand, as a renewable clean energy, solar energy is widely distributed and has large reserves. How to effectively use solar energy to provide sufficient energy for human beings has become a hot issue in current academic research.

Cold storage is a building that uses artificial refrigeration to cold process and store perishable foods. However, due to the low temperature and high humidity in the cold storage, the evaporator in the cold storage is severely frosted, which affects the storage quality and increases the energy consumption of the cold storage. Generally, cold storage needs to consume extra energy to remove the frost during defrosting, and then use the refrigeration device to eliminate the heat increased by defrosting, resulting in double energy waste.

In terms of solar energy utilization, the existing technologies mainly include solar heat collection technology and solar photovoltaic power generation technology. Solar heat collection technology simply generates heat through physical means, and the energy quality is low. Solar photovoltaic power generation technology uses solar energy to generate high-grade electric energy, which improves the utilization rate of solar energy. However, when the solar radiation hits the photovoltaic panel, only a small part of the energy is converted into electrical energy, and most of the rest of the solar energy is converted into heat energy, causing the temperature of the photovoltaic panel to rise. High, resulting in an increase in the internal resistance of the photovoltaic cell, reducing the power generation efficiency, how to effectively reduce the temperature of the photovoltaic panel has become a key issue in improving the power generation efficiency of the photovoltaic panel.

Chinese utility model patent CN207180131U discloses a simple and detachable solar cold storage, which uses different forms of electricity such as traditional photovoltaic panel power generation and wind-solar complementary power supply to replace the original single grid power supply mode, but does not consider the defrosting energy of the cold storage. Consumption and power generation efficiency of photovoltaic panels. Chinese patent CN108507267A discloses a solar cold storage defrosting system suitable for indirect refrigeration systems. The heat generated by the solar collector is used to defrost the cold storage evaporator, but the refrigeration unit must be turned off during defrosting. Chinese patents CN108507256A and CN207922654U both disclose a solar cold storage that is easy to move. They have made certain technical improvements mainly from the perspective of easy movement. They use solar energy to replace the traditional grid power supply, and do not consider the comprehensive utilization of solar energy.

To sum up, how to overcome the deficiencies of existing technologies, fully increase the power generation rate of solar energy, and reduce the energy consumption and comprehensive energy consumption of cold storage defrosting has become an urgent problem to be solved.

Contents of the invention

In order to solve the technical problems in the known technology, the utility model provides a cold storage refrigeration system based on solar PV/T technology that can fully improve the utilization rate of solar energy.

The technical solution adopted by the utility model to solve the technical problems existing in the known technology is: a cold storage refrigeration system based on solar PV/T technology, including a solar PV/T system, a refrigeration cycle system and a fusion system for the refrigeration cycle system The defrosting system of frost; the solar PV/T system outputs electric energy to supply the refrigeration cycle system; the refrigeration cycle system is provided with several defrosting pipelines, and the solar PV/T system is provided with a heat collector, so The heat collector outputs a defrosting medium for transferring heat energy to the defrosting pipeline through the defrosting system; the defrosting medium returns to the heat collector after flowing through the defrosting pipeline.

Further, the solar PV/T system includes a solar panel, a storage battery and an inverter electrically connected in sequence; the inverter outputs electric energy to supply the refrigeration cycle system; the heat collector is a plate heat collector, It is provided with a heat collecting pipeline on the back of the solar panel.

Further, the defrosting system includes a heat storage tank, a defrosting circulation pump, a defrosting liquid supply main circuit and a defrosting liquid return main circuit; the liquid outlet of the heat storage tank and the input of the defrosting circulation pump The output port of the defrosting circulation pump is connected with the input port of the heat collector; the output port of the heat collector is connected with the defrosting liquid supply main road; the defrosting liquid return main road It communicates with the first heat storage liquid inlet of the heat storage tank; the input port of the defrosting pipeline communicates with the defrosting liquid supply main circuit; the output port of the defrosting pipeline communicates with the defrosting pipeline The liquid return trunk is connected.

Further, the defrosting system also includes a first three-way valve; the inlet A of the first three-way valve communicates with the output port of the heat collector; the outlet B of the first three-way valve communicates with the The defrosting liquid supply trunk is connected; the outlet C of the first three-way valve is connected with the second heat storage liquid inlet of the heat storage tank.

Further, the defrosting system also includes a second three-way valve; the inlet A of the second three-way valve communicates with the output port of the defrosting circulation pump; the outlet B of the second three-way valve communicates with the output port of the defrosting circulation pump. The input port of the heat collector is connected; the outlet C of the second three-way valve is connected with the defrosting liquid supply main circuit.

Further, the refrigeration cycle system includes a compressor, a condenser, an evaporator, a cooling liquid supply main circuit, a cooling liquid return main circuit and several cooling fans; each of the cooling fans is provided with a cooling pipeline, each The input port of each cooling pipeline is communicated with the cooling liquid supply main circuit; the output port of each cooling pipeline is communicated with the cooling liquid return main circuit; the evaporator includes a cooling medium channel and is cooled Medium channel; the cooling medium channel of the evaporator, the compressor and the condenser are connected in sequence to form a cooling medium circulation loop; the cooled medium is output from the output port of the cooled medium channel, and flows through the After the cooling liquid supply main circuit, the cooling pipeline and the cooling liquid return main circuit are input to the input port of the cooled medium channel.

Further, the refrigeration cycle system also includes a cold storage tank, a first cooling circulation pump and a second cooling circulation pump, and the cold storage tank is provided with a first cold storage liquid inlet, a second cold storage liquid inlet, a first cold storage liquid outlet port and the second cold storage liquid outlet; the first cold storage liquid outlet is communicated with the input port of the cooled medium channel of the evaporator through the first cooling circulation pump; the first cold storage liquid inlet is connected to the The output port of the cooled medium channel of the evaporator is connected; the second cold storage liquid outlet is connected with the cooling liquid supply main circuit through the second cooling circulation pump; the second cold storage liquid inlet is connected with the The main path of cooling liquid return is connected.

Further, each of the air coolers is also provided with a defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler are the same pipeline; the cooled medium and the defrosting The medium is the same; each input port of the cooling pipeline is provided with an input three-way valve, the inlet A of the input three-way valve communicates with the input port of the cooling pipeline, and the outlet B of the input three-way valve communicates with the input port of the cooling pipeline. The cooling liquid supply main circuit is connected, and the outlet C of the input three-way valve is connected with the defrosting liquid supply main circuit; the output port of each cooling pipeline is provided with an output three-way valve, and the output three-way valve The inlet A of the one-way valve is connected with the output port of the cooling pipeline, the outlet B of the output three-way valve is connected with the cooling liquid return main circuit, and the outlet C of the output three-way valve is connected with the defrosting return Liquor connection.

Further, each of the air coolers is also provided with a defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler are the same pipeline; the cooled medium and the defrosting The medium is the same; the input port of each cooling pipeline is provided with two branches; each branch is provided with an input shut-off valve, and the output ports of the two input shut-off valves are connected to the input of the cooling pipeline The input port of the input shut-off valve of one branch is communicated with the cooling liquid supply main circuit, and the input port of the input shut-off valve of the other branch is communicated with the defrosting liquid supply main circuit; The output port of each cooling pipeline is provided with two branches; each branch is provided with an output cut-off valve, and the input ports of the two output cut-off valves are all communicated with the output port of the cooling pipeline, The output port of the output cut-off valve of one branch is connected with the cooling liquid return main circuit, and the output port of the output stop valve of the other branch is connected with the defrosting liquid return main circuit.

The advantages and positive effects that the utility model has are:

The utility model can make full use of solar energy, reduce the energy consumption and waste of the cold storage, use the defrosting medium to reduce the temperature after defrosting, reduce the temperature of the solar PV/T board, improve the power generation efficiency of the solar PV/T board, and use the solar PV/T board to reduce the temperature of the solar PV/T board. The heat generated by the T plate goes to defrost, which can save the power consumption of the electric defrosting method. The utility model not only utilizes the heat energy generated when the solar battery panel is working to defrost, but also transmits the cold energy generated by the heat exchange during defrosting to the solar battery panel, reduces the working temperature of the solar battery panel, and improves the solar PV/T The power generation efficiency of the panels can make full use of solar energy and improve the utilization rate of solar energy.

The utility model uses the same cold storage and heat storage circulation medium, and the cold storage and heat storage circulation medium can use the same pipeline in the air cooler, and the air cooler in the refrigeration cycle system can alternate between the defrosting working mode and the cooling working mode Switching reduces the volume of the electric heating tube in the air cooler during conventional electric defrosting, increasing the heat exchange area.

The utility model utilizes the electric energy generated by the solar PV/T panel for cooling during the day, saves energy, reduces or avoids the use of peak power of the power grid at the same time, reduces the cost of electricity, and considers the seasonal difference and instability of solar energy at the same time, the system adopts The cold storage design can fully improve the stability of the system operation.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Compressor; 2. Condenser; 3. Electronic expansion valve; 4. Evaporator; 5. First cooling circulation pump; 6. Cold storage tank; 7. Second cooling circulation pump; 8. Inverter ;9, storage battery; 10, solar panel; 11, second three-way valve; 12, defrosting circulation pump; 13, first three-way valve; 14, heat storage tank; 15, air cooler; 16, output three-way Valve; 17. Input three-way valve; 18. One-way valve; 101. Defrost liquid supply main circuit; 102. Defrost return liquid main circuit; 141. Second heat storage liquid inlet; 142. First heat storage inlet Liquid port; 143, liquid outlet of heat storage tank; 161, first cold storage liquid inlet; 162, second cold storage liquid inlet; 163, first cold storage liquid outlet; 164, second cold storage liquid outlet; 201 , Cooling liquid supply main road; 202, Cooling liquid return main road.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present utility model, the following embodiments are listed hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Fig. 1, a kind of cold storage refrigeration system based on solar PV/T technology, comprises solar PV/T system, refrigeration circulation system and the defrost system that is used for this refrigeration circulation system defrost; Described solar PV/T system output Electric energy is supplied to the refrigerating cycle system; the refrigerating cycle system is provided with several defrosting pipelines, and the solar PV/T system is provided with a heat collector, and the heat collector is supplied to the defrosting system through the defrosting system. The defrosting pipeline outputs a defrosting medium for transferring heat energy; the defrosting medium flows through the defrosting pipeline and then returns to the heat collector.

The defrosting medium is a heat medium, which can be various liquid or gaseous mediums capable of transmitting heat energy (heat) such as water and oil. The utility model is preferably a liquid heat medium. The defrosting pipeline refers to the heat exchange pipeline that releases heat energy through the flow of the medium that transmits heat energy to defrost.

The electric energy output generated by the solar PV/T system is supplied to some electrical equipment in the refrigeration cycle system, and can also be connected to the grid. The heat energy generated by the solar PV/T system is absorbed by the collector and passed through the defrosting system. Pipeline, which transmits heat energy to the defrosting pipeline of the refrigeration cycle system through the defrosting medium that transmits heat energy, and performs heat exchange in the defrosting pipeline to release heat energy, changing from a higher temperature defrosting medium to a lower temperature The defrosting medium after cooling, the defrosting medium returns to the collector through the pipeline of the defrosting system, absorbs heat energy again in the collector, and at the same time cools down the solar PV/T system, solar PV/T system, defrosting system And the defrosting pipeline of the refrigeration cycle system forms a circulation loop for the defrosting medium to flow. Use the low-temperature defrosting medium after defrosting to reduce the temperature of the solar PV/T panel, improve the power generation efficiency of the solar PV/T panel, use the heat generated by the solar PV/T system to heat up the defrosting medium, and use the higher temperature melting The frost medium conducts heat exchange in the defrosting pipeline to release heat energy, which can save the power consumption of the electric defrosting method.

Further, the solar PV/T system may include a solar panel 10, a storage battery 9 and an inverter 8 electrically connected in sequence; the inverter 8 outputs electric energy to supply the refrigeration cycle system; the heat collector may It is a plate heat collector, and it can be provided with a heat collecting pipeline on the back of the solar cell panel 10 . The battery 9 can be used to store electric energy; the output voltage of the inverter 8 can be the mains, which can be connected to the grid, and the output voltage is more suitable for a variety of conventional mains electrical equipment. The plate heat collector provided with heat collecting pipelines on the back of the solar cell panel 10 has a simple structure and high heat energy absorption efficiency.

Further, the defrosting system may include a heat storage tank 14, a defrosting circulation pump 12, a defrosting liquid supply main circuit 101 and a defrosting liquid return main circuit 102; the liquid outlet 143 of the heat storage tank is connected to the The input port of the defrosting circulating pump 12 is communicated; the output port of the defrosting circulating pump 12 is communicated with the input port of the heat collector; the output port of the heat collector is communicated with the defrosting liquid supply trunk 101 The defrosting liquid return main circuit 102 can be communicated with the first heat storage liquid inlet 142 of the heat storage tank 14; the input port of the defrosting pipeline is communicated with the defrosting liquid supply main circuit 101; The output port of the defrosting pipeline communicates with the defrosting liquid return main circuit 102 . The heat storage box 14 can be used to store heat energy. When the sunlight is insufficient and the heat energy generated by the heat collector is not enough to realize the defrosting of the refrigeration cycle system, the heat energy stored in the heat storage box 14 can be used to continuously supply the defrost of the refrigeration cycle system pipeline.

Further, the defrosting system can also include a first three-way valve 13; the inlet A of the first three-way valve 13 can communicate with the output port of the heat collector; The outlet B can communicate with the defrosting liquid supply main circuit 101 ; the outlet C of the first three-way valve 13 can communicate with the second heat storage liquid inlet 141 of the heat storage tank 14 .

Using the first three-way valve 13, through the opening and closing of different channels of the valve, the defrosting medium can realize different circulation modes:

1. When the sunlight is sufficient and the refrigeration cycle system needs to defrost, the inlet A of the first three-way valve 13 and the outlet B of the first three-way valve 13 are connected, and the heat collector can directly output the defrosting medium with a higher temperature , to the defrosting liquid supply main circuit 101, and then to the defrosting pipeline of the refrigeration cycle system that needs to be defrosted, so as to realize the defrosting of the refrigeration cycle system.

2. When there is sufficient sunlight and the refrigeration cycle system does not need defrosting, the inlet A of the first three-way valve 13 and the outlet C of the first three-way valve 13 are connected, and the heat collector can directly output higher temperature defrosting The medium is sent to the heat storage tank 14 through the second heat storage liquid inlet 141 of the heat storage tank 14 for thermal energy storage.

The first three-way valve 13 can be an electric or manual three-way valve, and other methods can also be used, such as setting two branches at the output port of the heat collector, and each branch is provided with an electric or manual stop valve.

Further, the defrosting system may also include a second three-way valve 11; the inlet A of the second three-way valve 11 may communicate with the output port of the defrosting circulation pump 12; the second three-way valve The outlet B of 11 can communicate with the input port of the heat collector; the outlet C of the second three-way valve 11 can communicate with the defrosting liquid supply main circuit 101 . When the second three-way valve 11 is installed, a one-way valve 18 is provided between the outlet B of the first three-way valve 13 and the defrosting liquid supply main circuit 101, so that the one-way flow of the defrosting medium can only flow to the melting The frost liquid supply trunk 101 cannot flow in reverse.

Using the second three-way valve 11, through the opening and closing of different channels of the valve, the defrosting medium can realize different circulation modes:

1. When there is sufficient sunlight and the refrigeration cycle system needs to defrost, the inlet A of the second three-way valve 11 and the outlet B of the second three-way valve 11 are connected, and the heat storage tank 14 can directly output the defrost with a lower temperature. The medium, to the heat collector, realizes the absorption of heat energy generated when the solar PV/T system is working, and releases cold energy to cool down the solar PV/T system.

2. When there is insufficient sunlight and the refrigeration cycle system needs to defrost, the temperature of the defrosting medium in the heat storage tank 14 is relatively high, and the inlet A of the second three-way valve 11 and the outlet C of the second three-way valve 11 are connected, and the storage The hot box 14 can directly output the high-temperature defrosting medium to the defrosting liquid supply main circuit 101, and then to the defrosting pipeline of the refrigeration cycle system that needs to be defrosted, so as to realize the defrosting of the refrigeration cycle system.

The second three-way valve 11 can be an electric or manual three-way valve, or other methods can be used, such as setting two branches at the output port of the defrosting circulation pump 12, and each branch is provided with an electric or manual stop valve.

The first three-way valve 13 and the second three-way valve 11 can be used in combination, and the defrosting system can realize different working modes:

1. When there is sufficient sunlight and the refrigeration cycle system needs to defrost, the inlet A of the first three-way valve 13 and the outlet B of the first three-way valve 13 are connected, and the inlet A of the second three-way valve 11 is connected to the second three-way valve. The outlet B of the through valve 11 is conducted, and the heat collector outputs the defrosting medium with a higher temperature through the first three-way valve 13, to the defrosting liquid supply main circuit 101, and then to the defrosting pipe of the refrigeration cycle system that needs to be defrosted In the road, the defrosting of the refrigeration cycle system is realized, and the defrosting medium with a lower temperature output from the defrosting pipeline goes to the defrosting liquid return main road 102, and then passes through the first heat storage liquid inlet 142 of the heat storage tank 14 Enter the heat storage tank 14, then output from the heat storage tank 14 through the defrosting circulation pump 12, and pass through the second three-way valve 11, so that the defrosting medium with a lower temperature is input into the heat collector to realize solar PV/T Absorption of thermal energy generated when the system is working, and release of cold energy to cool down the solar PV/T system.

2. When there is sufficient sunlight and the refrigeration cycle system does not need defrosting, the inlet A of the first three-way valve 13 and the outlet C of the first three-way valve 13 are connected, and the inlet A of the second three-way valve 11 is connected to the second outlet C. The outlet B of the three-way valve 11 is connected, and the defrosting medium with a lower temperature is output from the heat storage tank 14 through the defrosting circulation pump 12, and passes through the second three-way valve 11, so that the defrosting medium with a lower temperature is input to the collector In the heater, it realizes the absorption of heat energy generated when the solar PV/T system is working, and releases cold energy to cool down the solar PV/T system; after the defrosting medium absorbs heat energy, the temperature rises and is output from the heat collector, through A three-way valve 13 enters the heat storage tank 14 from the second heat storage liquid inlet 141 of the heat storage tank 14 to store heat energy.

2. When the sunlight is insufficient and the refrigeration cycle system needs defrosting, a one-way valve 18 is provided between the outlet B of the first three-way valve 13 and the main circuit 101 for the defrosting liquid supply, so that the defrosting medium is single The direction flow can only flow to the defrosting liquid supply main circuit 101 and cannot flow in the reverse direction, so it is not necessary to consider the conduction state of the first three-way valve 13 . The inlet A of the second three-way valve 11 is connected to the outlet C of the second three-way valve 11, the heat storage tank 14 passes through heat storage, the temperature of the defrosting medium in the heat storage tank 14 is relatively high, and the temperature of the high temperature defrosting medium Output from the heat storage tank 14 through the defrosting circulation pump 12, through the second three-way valve 11, to the defrosting liquid supply main circuit 101, and then to the defrosting pipeline of the refrigeration circulation system that needs to defrost, to realize the refrigeration circulation system For defrosting, the defrosting medium with a relatively low temperature output from the defrosting pipeline goes to the main defrosting liquid return path 102 , and then enters the heat storage tank 14 through the first heat storage liquid inlet 142 of the heat storage tank 14 .

The first heat storage liquid inlet 142 of the heat storage tank 14 and the second heat storage liquid inlet 141 of the heat storage tank 14 are preferably located on the top of the heat storage tank, and the liquid outlet of the heat storage tank 143 is preferably located at the bottom of the heat storage tank.

Further, the refrigeration cycle system may include a compressor 1, a condenser 2, an evaporator 4, a cooling liquid supply main circuit 201, a cooling liquid return main circuit 202, and several air coolers 15; each of the air coolers 15 may A cooling pipeline is provided, and the input port of each cooling pipeline communicates with the cooling liquid supply main circuit 201; the output port of each cooling pipeline communicates with the cooling liquid return main circuit 202; The evaporator 4 may include a cooling medium channel and a cooled medium channel; the cooling medium channel of the evaporator 4, the compressor 1 and the condenser 2 are sequentially connected to form a circulation loop of the cooling medium; the cooled medium, It can be output from the output port of the cooled medium channel, and after passing through the cooling supply liquid main circuit 201, the cooling pipeline and the cooling liquid return main circuit 202 in sequence, it is input to the cooled medium channel input port. According to the area and cooling capacity requirements of the cold storage, a refrigeration unit composed of a group of compressors 1 and condensers 2 can be set up, with multiple air coolers 15, and the work of the air coolers 15 can be controlled to adjust the temperature more conveniently; and it is convenient to alternate Defrost to avoid large temperature fluctuations in the warehouse.

The cooling medium channel of the evaporator 4 circulates the cooling medium, and the cooled medium channel circulates the cooled medium; the cooling medium and the cooled medium perform heat exchange in the evaporator.

Both the cooling medium and the cooled medium are a kind of refrigerant, which can be various liquid media or gas media capable of transmitting cold energy (cooling capacity) such as water and oil. The utility model is preferably a liquid refrigerant. The cooling pipeline refers to the heat exchange pipeline for cooling by releasing the cold energy through the flow of the medium that transmits the cold energy.

Further, the refrigeration cycle system may also include a cold storage tank 6, a first cooling circulation pump 5 and a second cooling circulation pump 7, and the cold storage tank 6 is provided with a first cold storage liquid inlet 161, a second cold storage liquid inlet 162. The first cold storage liquid outlet 163 and the second cold storage liquid outlet 164; the first cold storage liquid outlet 163 can pass through the first cooling circulation pump 5 and the cooling medium passage of the evaporator 4 The mouth is connected; the first cold storage liquid inlet 161 can be communicated with the output port of the cooled medium channel of the evaporator 4; the second cold storage liquid outlet 164 can be connected to the second cooling circulation pump 7 The cooling liquid supply main path 201 is communicated; the second cold storage liquid inlet 162 can be communicated with the cooling liquid return main path 202 . The first cold storage liquid inlet 161 and the second cold storage liquid inlet 162 of the cold storage tank 6 are preferably located on the top of the heat storage tank, and the first cold storage liquid outlet 163 and the second cold storage liquid outlet of the cold storage tank 6 are Port 164 is preferably located at the bottom of the thermal storage tank.

This way of using the cold storage box 6 can use the electric energy generated by the solar PV/T panel for cooling during the day, reducing or avoiding the peak power consumption of the power grid. At the same time, considering the seasonal differences and instability of solar energy, the system adopts a cold storage type The design can fully improve the stability of the system operation.

Further, each of the air coolers 15 can also be provided with a defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler 15 can be the same pipeline; the cooled medium and The defrosting medium is the same; the input port of each cooling pipeline can be provided with an input three-way valve 17, and the inlet A of the input three-way valve 17 can communicate with the input port of the cooling pipeline, and the The outlet B of the input three-way valve 17 can be communicated with the cooling liquid supply main circuit 201, and the outlet C of the input three-way valve 17 can be communicated with the defrosting liquid supply main circuit 101; each of the cooling pipelines The output port of the output port can be provided with an output three-way valve 16, the inlet A of the output three-way valve 16 can communicate with the output port of the cooling pipeline, and the outlet B of the output three-way valve 16 can be connected with the cooling return The main liquid path 202 is connected, and the outlet C of the output three-way valve 16 can communicate with the main liquid return path 102 for defrosting.

When the air cooler 15 works in the cooling mode, the inlet A of the input three-way valve 17 is connected to the outlet B of the input three-way valve 17, and the inlet A of the output three-way valve 16 is connected to the outlet B of the output three-way valve 16. The heat exchange pipeline of the air cooler 15 is a cooling pipeline, and the cooled medium flows into the cooling pipeline to release cold energy for refrigeration.

When the air cooler 15 works in the defrosting mode, the input A of the three-way valve 17 is connected to the outlet C of the input three-way valve 17, and the inlet A of the output three-way valve 16 is connected to the outlet C of the output three-way valve 16. , the heat exchange pipeline of the air cooler 15 is a defrosting pipeline, and the defrosting medium flows into the defrosting pipeline to release heat energy for defrosting.

The input three-way valve 17 and the output three-way valve 16 can be electric or manual three-way valves, and other methods can also be used, such as setting two branches at the input port of the cooling pipeline, and each branch is equipped with an electric or manual cut-off Valve, and the output port of the cooling pipeline is provided with two branches, and each branch is equipped with an electric or manual shut-off valve.

For example, each of the air coolers 15 can also be provided with a defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler can be the same pipeline; The defrosting medium is the same; the input port of each cooling pipeline can be provided with two branches; each branch can be provided with an input stop valve, and the output ports of the two input stop valves are connected with the cooling The input port of the pipeline is connected, the input port of the input stop valve of one branch is connected with the cooling liquid supply main circuit, and the input port of the input stop valve of the other branch is connected with the defrosting liquid supply The main circuit is connected; the output port of each cooling pipeline can be provided with two branches; each branch can be provided with an output stop valve, and the input ports of the two output stop valves are connected with the cooling pipe The output port of the output cut-off valve of one branch is connected with the cooling liquid return main circuit, and the output port of the output stop valve of the other branch is connected with the defrosting liquid return dry circuit. The road connects.

The same air cooler 15 can alternately switch between the defrosting working mode and the cooling working mode as required, but it cannot work in both the defrosting working mode and the cooling working mode at the same time.

At the same time, the working modes of different air coolers 15 can be different. Some air coolers 15 can work in the defrosting mode, and some air coolers 15 can work in the cooling mode; some air coolers 15 can also be shut down and not work. .

Several air coolers 15 can alternately work in the defrosting mode or the cooling mode; in this way, the temperature of the cold storage will not fluctuate greatly due to the simultaneous defrosting of the air coolers 15 .

In this way, the air cooler 15 can alternately switch between the defrosting working mode and the cooling working mode, the cold storage circulation medium is the cooled medium for heat exchange in the evaporator 4, and the heat storage circulation medium is the collector of the solar PV/T system. The defrosting medium used by the heater to absorb heat energy is the same as the cooling medium and the defrosting medium, so that the cold storage and thermal storage circulation medium can use the same pipe in the air cooler 15, reducing the need for electric heating pipes in the air cooler 15 during conventional electric heating defrosting The volume increases the heat transfer area. And the structure of the air cooler 15 is simpler.

The utility model also provides an embodiment of a working method of a cold storage refrigeration system based on solar PV/T technology. The method is as follows: supply the electric energy generated by the solar panel 10 to the refrigeration cycle system, and supply the electric energy generated by the solar panel 10 to The heat energy is absorbed by the heat collector, and through the defrosting medium used to transmit heat energy, the heat energy is transmitted to several defrosting pipelines of the refrigeration cycle system, and the defrosting medium performs heat exchange in the defrosting pipeline, and then returns to the collector. heater.

The electrical energy output generated by the solar PV/T system is supplied to some electrical equipment in the refrigeration cycle system. The heat energy generated by the solar PV/T system is absorbed by the heat collector, and the heat energy is transmitted through the pipeline of the defrosting system. The thermal energy defrosting medium is transmitted to the defrosting pipeline of the refrigeration cycle system, and heat exchange is performed in the defrosting pipeline to release heat energy, and the defrosting medium with a higher temperature becomes a defrosting medium with a lower temperature. The defrosting medium returns to the heat collector through the pipeline of the defrosting system, and absorbs heat energy again in the heat collector, and at the same time cools down the solar PV/T system. Use the low-temperature defrosting medium after defrosting to reduce the temperature of the solar PV/T panel, improve the power generation efficiency of the solar PV/T panel, use the heat generated by the solar PV/T system to heat up the defrosting medium, and use the higher temperature melting The frost medium conducts heat exchange in the defrosting pipeline to release heat energy, which can save the power consumption of the electric defrosting method.

Further, the thermal energy generated when the solar panel 10 is in operation can be absorbed and stored in the heat storage tank 14. Through valve control, when the sunlight is sufficient and the refrigeration cycle system needs to defrost, the heat energy of the heat collector can be transported to the refrigeration system. In the defrosting pipeline of the circulatory system; when there is sufficient sunlight and the refrigerating circulatory system does not need to defrost, the thermal energy of the heat collector can be transported to the heat storage tank 14; when the sunlight is insufficient and the refrigerating circulatory system needs to defrost, The thermal energy of the thermal storage tank 14 can be delivered to the defrosting pipeline of the refrigeration cycle system. The heat storage box 14 can be used to store heat energy. When the sunlight is insufficient and the heat energy generated by the heat collector is not enough to realize the defrosting of the refrigeration cycle system, the heat energy stored in the heat storage box 14 can be used to continuously supply the defrost of the refrigeration cycle system pipeline. This method also improves the utilization rate of solar energy.

Below in conjunction with a preferred embodiment of the present utility model several working processes of the present utility model are described:

When the solar panel 10 is working during the day and the cooling fans 15 of the cold storage do not need to defrost, the defrosting medium is driven by the defrosting circulation pump 12 from the heat storage tank 14 through the second three-way valve 11 (at this time, port A and Port B conduction) enters the heat collecting pipeline on the back side of the solar cell panel 10, absorbs the heat in the solar cell panel 10, and then returns to the heat storage tank 14 through the first three-way valve 13 (port A and C port conduction at this time) , so that the heat in the solar panel 10 is collected in the heat storage box 14. At this time, the electric energy generated by the solar panel 10 passes through the battery 9, and is used for the operation of the compressor 1 through the inverter 8. The compressor 1, the condenser 2 The refrigerating system composed of electronic expansion valve 3 and evaporator 4 produces cooling capacity, and the evaporator 4 includes a cooling medium channel and a cooled medium channel; the cooling medium channel of the evaporator 4, the compressor 1 and the The condenser 2 is sequentially connected to form a circulation loop of the cooling medium; the cooled medium is output from the output port of the cooled medium channel, and flows through the cooling liquid supply main circuit 201, the cooling pipeline and the cooling medium in sequence. After the liquid return trunk 202, it is input to the input port of the cooled medium channel.

The cooled medium stored in the cold storage tank 6 enters the cooled medium channel of the evaporator 4 under the action of the first cooling circulation pump 5, and the cooled medium is cooled by exchanging heat with the cooling medium in the cooling medium channel. The medium is output to the cold storage box 6 after heat exchange, and the cold energy carried is stored in the cold storage box 6; each of the cooling fans 15 is provided with a cooling pipeline, and the input port of each cooling pipeline is connected to the cooling pipeline. The cooling liquid supply main circuit 201 is in communication; the output port of each cooling pipeline is in communication with the cooling liquid return main circuit 202;

When the cold storage needs to be refrigerated, one or more of the cooling fans 15 enters the cooling working mode, and the cooling medium in the cold storage box 6 is transported to the cooling liquid supply main circuit 201 through the second cooling circulation pump 7, and the cooling medium passes through the cooling fans. The input three-way valve 17 of the input port of 15 (at this time, the A port and the B port are connected), enters the cooling pipeline of the air cooler 15, releases cold energy after heat exchange in the cooling pipe, and then passes through the outlet of the air cooler 15. The output three-way valve 16 (port A and port B are connected at this time) enters the cooling liquid return main circuit 202, and finally returns to the cold storage tank 6 through the cooling liquid return main circuit 202 to realize the refrigeration cycle of the air cooler 15.

When the solar panel 10 is working during the day, when one or more air coolers 15 need to defrost, these air coolers 15 that need to be defrosted are switched to the defrosting mode, and the defrosting in the heat storage box 14 The medium sequentially passes through the defrosting circulating pump 12, the second three-way valve 11 (at this time, the A port and the B port are connected), the heat collection pipeline of the solar panel 10, and the first three-way valve 13 (at this time, the A port and the B port are connected). Port conduction), defrosting liquid supply main circuit 101, input three-way valve 17 (at this time, port A and port C are conducting), cooling pipeline of air cooler 15, output three-way valve 16 (at this time, port A and port C port conduction), defrosting and returning to the main circuit 102, and finally returning to the heat storage tank 14 to realize the defrosting work of the air cooler 15.

When the solar panel 10 is not working at night, and a certain air cooler 15 in the cold storage needs to defrost, the defrosting medium in the heat storage tank 14 passes through the defrosting circulation pump 12 and the second three-way valve 11 in turn (at this time A Port and C port conduction), defrosting liquid supply main circuit 101, input three-way valve 17 (at this time, A port and C port conduction), cooling pipeline of air cooler 15, output three-way valve 16 (at this time, A port Port and C port conduction), defrost liquid return main circuit 102, and finally return to heat storage tank 14 to complete the defrosting operation of air cooler 15, and other air coolers 15 can work in cooling mode.

At night, when the cold storage capacity of the cold storage box 6 cannot meet the cooling requirements of the cold storage, the power grid power can be used to supply power to the refrigeration cycle system, which can realize continuous cooling of the refrigeration system, thereby ensuring the stability of the temperature of the cold storage. At the same time, according to the meteorological data, the electric energy that the solar panel 10 can provide during the next day is predicted. Under severe working conditions, when the solar panel 10 cannot provide enough power to meet the cooling load of the cold storage, the low-peak electricity at night can be used in advance to store cold storage. Box 6 is used for cold storage to meet the cold storage demand for the next day.

The embodiments described above are only used to illustrate the technical ideas and characteristics of the present utility model, and its purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and the present utility model cannot be limited only by this embodiment. The patent scope of the utility model, that is, all equivalent changes or modifications made to the spirit disclosed in the utility model still fall within the patent scope of the utility model.

Claims (9)

1. A refrigeration house refrigeration system based on solar PV/T technology is characterized by comprising a solar PV/T system, a refrigeration cycle system and a defrosting system for defrosting the refrigeration cycle system; the solar PV/T system outputs electric energy to supply to the refrigeration cycle system; the refrigeration cycle system is provided with a plurality of defrosting pipelines, the solar PV/T system is provided with a heat collector, and the heat collector outputs a defrosting medium for transmitting heat energy to the defrosting pipelines through the defrosting system; the defrosting medium returns to the heat collector after flowing through the defrosting pipeline.

2. The solar PV/T technology based cold storage refrigeration system according to claim 1, characterized in that the solar PV/T system comprises a solar panel, a storage battery and an inverter electrically connected in sequence; the inverter outputs electric energy to supply to the refrigeration cycle system; the heat collector is a plate type heat collector, and a heat collecting pipeline is arranged on the back of the solar cell panel.

3. The solar PV/T technology-based chiller refrigeration system of claim 1, wherein the defrost system comprises a thermal storage tank, a defrost circulation pump, a defrost supply trunk, and a defrost return trunk; a liquid outlet of the heat storage box is communicated with an input port of the defrosting circulating pump; the output port of the defrosting circulating pump is communicated with the input port of the heat collector; the output port of the heat collector is communicated with the defrosting liquid supply main path; the defrosting liquid return main circuit is communicated with a first heat storage liquid inlet of the heat storage box; the input port of the defrosting pipeline is communicated with the defrosting liquid supply main pipeline; and the output port of the defrosting pipeline is communicated with the defrosting liquid return main circuit.

4. The solar PV/T technology based freezer refrigeration system of claim 3, wherein the defrosting system further comprises a first three-way valve; an inlet A of the first three-way valve is communicated with an output port of the heat collector; an outlet B of the first three-way valve is communicated with the defrosting liquid supply main line; and an outlet C of the first three-way valve is communicated with a second heat storage liquid inlet of the heat storage tank.

5. The solar PV/T technology based freezer refrigeration system of claim 3, wherein the defrosting system further comprises a second three-way valve; an inlet A of the second three-way valve is communicated with an output port of the defrosting circulating pump; an outlet B of the second three-way valve is communicated with the inlet of the heat collector; and an outlet C of the second three-way valve is communicated with the defrosting liquid supply main line.

6. The refrigeration house refrigeration system based on the solar PV/T technology according to claim 3, wherein the refrigeration cycle system comprises a compressor, a condenser, an evaporator, a cooling liquid supply trunk, a cooling liquid return trunk and a plurality of air coolers; each air cooler is provided with a cooling pipeline, and an input port of each cooling pipeline is communicated with the cooling liquid supply main line; the output port of each cooling pipeline is communicated with the cooling liquid return main circuit; the evaporator comprises a cooling medium channel and a cooled medium channel; the cooling medium channel of the evaporator, the compressor and the condenser are communicated in sequence to form a circulation loop of a cooling medium; and the cooled medium is output from an output port of the cooled medium channel, sequentially flows through the cooling liquid supply main line, the cooling pipeline and the cooling liquid return main line, and is input to an input port of the cooled medium channel.

7. The solar PV/T technology based refrigeration house refrigeration system of claim 6, wherein the refrigeration cycle system further comprises a cold storage tank, a first cooling circulation pump and a second cooling circulation pump, the cold storage tank is provided with a first cold storage liquid inlet, a second cold storage liquid inlet, a first cold storage liquid outlet and a second cold storage liquid outlet; the first cold accumulation liquid outlet is communicated with the inlet of the cooled medium channel of the evaporator through the first cooling circulating pump; the first cold accumulation liquid inlet is communicated with an output port of a cooled medium channel of the evaporator; the second cold accumulation liquid outlet is communicated with the cooling liquid supply trunk through the second cooling circulating pump; the second cold accumulation liquid inlet is communicated with the cooling liquid return main line.

8. The solar PV/T technology-based freezer refrigeration system of claim 7, wherein each air cooler is further provided with one said defrosting conduit, and the cooling conduit and the defrosting conduit of the same air cooler are the same conduit; the cooled medium and the defrosting medium are the same; an input three-way valve is arranged at an input port of each cooling pipeline, an inlet A of the input three-way valve is communicated with the input port of the cooling pipeline, an outlet B of the input three-way valve is communicated with the cooling liquid supply main line, and an outlet C of the input three-way valve is communicated with the defrosting liquid supply main line; and an output three-way valve is arranged at an output port of each cooling pipeline, an inlet A of the output three-way valve is communicated with the output port of each cooling pipeline, an outlet B of the output three-way valve is communicated with the cooling liquid return main line, and an outlet C of the output three-way valve is communicated with the defrosting liquid return main line.

9. The solar PV/T technology-based freezer refrigeration system of claim 7, wherein each air cooler is further provided with one said defrosting conduit, and the cooling conduit and the defrosting conduit of the same air cooler are the same conduit; the cooled medium and the defrosting medium are the same; an input port of each cooling pipeline is provided with two branches; each branch is provided with an input stop valve, the output ports of the two input stop valves are communicated with the input port of the cooling pipeline, the input port of the input stop valve of one branch is communicated with the cooling liquid supply main line, and the input port of the input stop valve of the other branch is communicated with the defrosting liquid supply main line; the output port of each cooling pipeline is provided with two branches; each branch is provided with an output stop valve, the input ports of the two output stop valves are communicated with the output port of the cooling pipeline, the output port of the output stop valve of one branch is communicated with the cooling liquid return main circuit, and the output port of the output stop valve of the other branch is communicated with the defrosting liquid return main circuit.