CN212299588U

CN212299588U - Cold volume reposition of redundant personnel control system of ice cold-storage freezer is directly driven to photovoltaic

Info

Publication number: CN212299588U
Application number: CN202020951555.5U
Authority: CN
Inventors: 李明; 周晓艳; 胡承志; 杜文平
Original assignee: Yunnan Normal University
Current assignee: Yunnan University YNU; Yunnan Normal University
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-05
Anticipated expiration: 2030-05-29

Abstract

The utility model provides a photovoltaic directly drives cold volume reposition of redundant personnel control system of ice cold-storage freezer, the utility model discloses a characterized in that evaporimeter ice-making system all integrates in the precooling freezer with cold system, when the maximize utilizes solar energy, can also reduce the loss of transmission cold volume, further improves energy exchange efficiency, promotes ice-making efficiency, has still saved the pipe-line components who carries cold water simultaneously.

Description

Cold volume reposition of redundant personnel control system of ice cold-storage freezer is directly driven to photovoltaic

Technical Field

The utility model belongs to the technical field of the refrigeration, concretely relates to solar energy directly drives refrigeration technology.

Background

Along with the improvement of living standard of people, the market demand is continuously enhanced, the importance of fruits and vegetables to people is self-evident, so the construction speed and the production scale of a refrigerating chamber are continuously accelerated by pre-cooling the fruits and vegetables, the energy conservation of the refrigerating chamber is particularly important under the condition of increasingly tense energy, a solar energy driving ice-making system utilizing one of clean energy is concerned, but due to the nonuniformity of solar irradiance, the sensible heat or latent heat of cold energy prepared by solar energy is stored, a cold storage technology used at a peak of standby load is taken as the key point of the development of future solar refrigeration, the cold storage technology can balance the load of a power grid, reduce the capacity of a power distribution and refrigerating unit, improve the operation efficiency and reduce the operation cost.

Disclosure of Invention

For make full use of solar energy, the utility model provides a photovoltaic directly drives ice cold-storage freezer cold volume reposition of redundant personnel control system, the technical problem who solves is how the maximize utilizes solar energy resource, makes photovoltaic module generated energy and cold-stored room cold load power consumption match, reforms transform evaporating system, realizes the steady work of cooling system and ice-making system, improves system ice efficiency, promotes energy comprehensive utilization, reduce cost.

In order to solve the technical problem, the technical proposal of the utility model is as follows.

According to the condition of the cold quantity requirement of the pre-cooling refrigerating chamber, the number and the connection mode of the photovoltaic modules are selected, and the generated energy of the solar energy supply system is well matched with the power consumption of the cold load of the pre-cooling refrigerating chamber.

In order to make up for the problem of solar energy intermittence, guarantee the work of a cooling system and an ice making system, the whole set of evaporator system is optimized and transformed, after optimization, an evaporator I of the cooling system and an evaporator II of the ice making system do not share an evaporator and are connected in series to be positioned in a pre-cooling refrigerating chamber, moreover, the evaporator II of the ice making system and an evaporator III of a cold exchanging system are both arranged in an ice storage tank and are integrated in the pre-cooling refrigerating chamber, and when the evaporator II makes ice, cold energy can also supply cold to the pre-cooling refrigerating chamber through direct contact. The evaporator operation control strategy of the evaporator system is direct current generated by a photovoltaic assembly in daytime, after the direct current flows through a controller with maximum power tracking, the photovoltaic assembly can be ensured to work on a maximum power point all the time, the output power is always kept to be maximum, when irradiance reaches the starting condition of the compressor system, the compressor drives a refrigeration working medium to flow to the evaporator II to make ice and store cold, the evaporator I of the ice making system does not work, and the temperature of the precooling refrigerating chamber fed back by a temperature sensor does not reach the required precooling refrigerating temperature of about 0 ℃. Along with the gradual increase of solar irradiance, the evaporator system controller starts the ice making system evaporator I, the compressor drives the refrigeration working medium to flow to the evaporator I and supply cold to the precooling refrigerating chamber through the air cooler, but also flows to the evaporator II for ice making and cold storage, and is stored in a cold quantity form, and simultaneously can play a role in reducing the temperature of the precooling refrigerating chamber, when the temperature fed back by the temperature sensor of the precooling refrigerating chamber reaches about 0 ℃, the solar irradiance reaches the maximum value of one day, the evaporator system controls the evaporator I of the cooling system to stop working, at the moment, the ice making of the evaporator II is only needed to maintain the temperature of the precooling chamber at about 0 ℃, the ice making system continuously operates along with the gradual reduction of solar irradiance until the solar irradiance can not drive the compressor system to operate, and the energy waste is reduced by adopting an intelligent allocation method according to the requirement. When the sun is absent at night, the temperature is lower at night, so the cold energy stored by the evaporator II of the ice making system in the daytime is required, according to the cold requirement of the pre-cooling chamber, a working medium pump in the cold exchange circulation system is started at any time to transmit the cold energy in the evaporator III to the pre-cooling refrigerating chamber through the cold exchange fan, the temperature of the pre-cooling chamber is maintained, the pre-cooling chamber supplies cold for 24 hours without interruption, and a new circulation is started until the sun comes out.

Drawings

Figure 1 is the utility model provides a pair of photovoltaic directly drives ice cold-storage freezer cold volume reposition of redundant personnel control system structure picture.

The system comprises a photovoltaic module 1, a maximum power controller 2, an inverter 3, a compressor 4, a condenser 5, a throttle valve 6, an evaporator I7, an evaporator II 8, an ice storage tank 9, an evaporator III 10, a circulating working medium pump 11, a cooling fan 12 and a cooling fan 13.

Detailed Description

As shown in figure 1, the utility model discloses a photovoltaic directly drives its characterized in that of ice cold-storage freezer cold volume reposition of redundant personnel control system is for guaranteeing cooling system, ice-making system and trade cold system reliable operation, has carried out optimization transformation to the evaporimeter of these three sets of systems, adopts the allocation control mode as required of intelligence. The evaporator operation control strategy of the evaporator system is direct current generated by a photovoltaic assembly in daytime, after the direct current flows through a controller with maximum power tracking, the photovoltaic assembly can be ensured to work on a maximum power point all the time, the output power is always kept to be maximum, when irradiance reaches the starting condition of the compressor system, a compressor drives a refrigeration working medium to flow to an evaporator II to make ice and store cold, an evaporator I does not work, and the temperature of a precooling refrigerating chamber fed back by a temperature sensor does not reach the required precooling refrigerating temperature of about 0 ℃. Along with the gradual increase of solar irradiance, the evaporator system controller starts the first evaporator of the cooling supply system, the compressor drives the refrigeration working medium to flow to the first evaporator to supply cold for the precooling refrigerating chamber through the air cooler, and flow to the second evaporator to make ice and store the cold in a cold quantity form, and simultaneously, the compressor can play a role in reducing the temperature of the precooling refrigerating chamber. When the sun is absent at night, the temperature at night is lower, so the cold energy stored by the evaporator II of the ice making system in the daytime is needed, according to the cold requirement of the pre-cooling chamber, a circulating working medium pump in the cold exchange circulating system is started at any time to transmit the cold energy in the evaporator III to the pre-cooling refrigerating chamber through the cold exchange fan, the temperature of the pre-cooling chamber is maintained, the pre-cooling chamber supplies cold for 24 hours without interruption, and a new cycle is started until the sun comes out.

Claims

1. A cold flow shunting control system of a photovoltaic direct-drive ice cold storage refrigerator is characterized by mainly comprising a photovoltaic assembly, a controller with maximum power tracking, an inverter, a variable frequency compressor, a condenser, a throttle valve, an evaporator, an ice storage tank, a working medium pump, a heat exchange cooler and a precooling refrigerating chamber, wherein a temperature sensor is arranged in the precooling refrigerating chamber.

2. The cold flow shunting control system for the photovoltaic direct-drive ice cold storage refrigerator according to claim 1 is characterized in that an evaporator of a cold supply system and an evaporator of an ice making system are connected in series and are positioned in a refrigerating room, automatic switching between ice making and cold supply is realized through intelligent control, and the practicability of the system is improved.

3. The cold quantity flow-dividing control system of the photovoltaic direct-drive ice cold storage refrigerator according to claim 1, wherein an evaporator of the ice making system and an evaporator of the cold exchanging system are both arranged in the ice storage tank and integrated in the refrigerating room, and the temperature of the precooling refrigerating room can be reduced while ice making is carried out.