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Refrigerated display cabinet control method without temperature fluctuation

A technology for refrigerated display cabinets and temperature fluctuations, which is applied to display cabinets, household appliances, applications, etc., can solve the problems of small application scope and temperature fluctuation of refrigerated cabinets, and achieve the effect of expanding the scope of application.

Active Publication Date: 2021-10-29
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a control method for refrigerated showcases without temperature fluctuations, which solves the technical problems of the existing refrigerated cabinets with large temperature fluctuations and small scope of application

Method used

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  • Refrigerated display cabinet control method without temperature fluctuation
  • Refrigerated display cabinet control method without temperature fluctuation
  • Refrigerated display cabinet control method without temperature fluctuation

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Experimental program
Comparison scheme
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Embodiment 1

[0028] Embodiment 1, a kind of refrigerated showcase control method without temperature fluctuation, such as Figure 1-Figure 4 As shown, the display cabinet includes a cabinet body 5, the shape of the cabinet body 5 is the same as that of the existing open display cabinet, the inside of the cabinet body 5 is provided with a backboard 3 which is spaced from the outer wall, and the outside is provided with an open port 9. An air duct 7 is provided between the back plate 3 and the outer wall, and the air duct 7 is provided with corresponding air outlets 8 and return air outlets 10 on the upper and lower sides of the open port 9, and the air outlet 8 and the return air outlet 10 are both provided with circulating fans , through the operation of the circulation fan, the air in the air duct 7 can circulate through the open port 9 to form an isolation air curtain.

[0029] The cabinet body 5 is provided with a refrigeration system, and the refrigeration system includes four refriger...

Embodiment 2

[0040] Embodiment 2, a control method for a refrigerated showcase without temperature fluctuations. In the defrosting mode, the circulating fan is controlled to be turned on at low power, and the small amount of cold energy emitted by the evaporator 1, the cooling pipe 2 and the fins 4 makes the air outlet Between 8 and the air return port 10, a low-speed medium-temperature air curtain is formed. The flow of the low-speed medium-temperature air curtain is small and the flow velocity is slow, so the contact time with the outside air and the air around the refrigerated shelf 6 is long. Its advantages are reflected in two aspects: first, it can absorb the cold energy of the parts that need to be defrosted, which helps Second, it can mix the absorbed cold of the defrosted part with the heat of the outside air, and the temperature difference between the mixed air curtain temperature and the temperature of the gas discharged from the air outlet 8 is small, which can effectively reduc...

Embodiment 3

[0043] Embodiment 3, a control method for a refrigerated showcase without temperature fluctuations. In the defrosting mode, the circulating fan is controlled to be closed, and the small amount of cold energy emitted by the evaporator 1, the cooling pipeline 2 and the fins 4 makes the air outlet 8 and the The air return port 10 forms a medium-temperature atmosphere. The medium-temperature atmosphere is formed at the air outlet 8 and the return air outlet 10, and the cold air around the shelf 6 and the hot air from the outside will gather here for heat exchange, and heat exchange will be performed here after losing the power of the circulating fan The amount of heat exchanged will be reduced and slowed down, and the moderate temperature gas will not cause large temperature fluctuations after entering the air duct 7, and the important thing is that the defrosting can be accelerated.

[0044] Although the medium-temperature air mass cannot effectively prevent the external air from...

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Abstract

The invention discloses a refrigerated display cabinet control method without temperature fluctuation. An air duct is arranged in a display cabinet, an evaporator of a refrigerating system is located in the air duct, fins are arranged in the air duct, a refrigerating shelf is arranged on a back plate, a phase change energy storage material is arranged in the refrigerating shelf, and heat pipes connected with the fins are arranged in the phase change energy storage material. A cold supply pipeline passing through the air duct is arranged in the phase change material, the cold supply pipeline is connected to a parallel refrigeration circulation pipeline section between the evaporator and the compressor in parallel and provided with an electromagnetic valve. The control method comprises a refrigeration mode and a defrosting mode for controlling the refrigeration system and the electromagnetic valve to act. The cold storage performance of a refrigerant, the temperature uniformity of a heat pipe and the cold storage and cold release characteristics of a phase change energy storage material are utilized, a refrigeration shelf and a refrigeration system are improved, and a cold supply pipeline, the refrigeration system and a circulating fan are controlled to adopt different working states in a refrigeration mode and a defrosting mode; the problems that an existing refrigeration display cabinet is uneven in temperature and large in fluctuation are solved.

Description

technical field [0001] The invention relates to the technical field of refrigeration showcases, in particular to a control method for refrigeration showcases without temperature fluctuation. Background technique [0002] As the end of the cold chain, the refrigerated display cabinet is a device that consumes a lot of energy and is also the weakest link in the cold chain. The common refrigerated showcase is an open showcase, which is composed of a showcase body, a refrigeration system, an air duct, and a refrigerated shelf. The front end of the cabinet body is developed to be open or completely open. When the existing refrigerated showcase works, most of the refrigerated energy produced by the refrigerating system through the evaporator is used to cool the air in the air duct, and the other part is used to cool the goods on the refrigerated shelf. The air curtain is formed when the inlet and outlet of the air duct of the cabinet are circulated. Part of the cold air in the ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47F3/04
CPCA47F3/0447A47F3/0452
Inventor 吕彦力袁培王琳贺刘皓文杜孟雨
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY