Hot air defrosting system for refrigerator and control method of hot air defrosting system

A technology for hot gas defrosting and refrigerators, applied in defrosting, refrigerators, refrigeration components, etc., can solve the problems of electric heater leakage, fire, low defrosting efficiency of electric heating, and temperature rise in freezer compartments, and reduce defrosting. Energy consumption, food quality assurance, and high defrosting efficiency

Active Publication Date: 2015-05-13
盐城市临海纺织染整科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The efficiency of defrosting by electric heating is low. Only about 15% of the total power consumption of electric heating elements is used for defrosting, and the rest of the heat is dissipated into the freezer compartment of the refrigerator, resulting in an increase in the temperature of the freezer compartment. , the heat load of the refrigerator increas

Method used

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  • Hot air defrosting system for refrigerator and control method of hot air defrosting system
  • Hot air defrosting system for refrigerator and control method of hot air defrosting system
  • Hot air defrosting system for refrigerator and control method of hot air defrosting system

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Embodiment 1

[0027] Such as figure 1 As shown, the hot gas defrosting system of a refrigerator in this embodiment is used for direct cooling refrigerators and air direct cooling refrigerators, including a compressor 1, a condenser 3, a first capillary tube 4, a one-way valve 5, and a freezing evaporator 6 connected in sequence , refrigerating evaporator 9 and accumulator 10, and accumulator 10 is also connected with compressor 1; the hot gas defrosting system includes defrosting branch 11, and described defrosting branch 11 is connected in parallel at the outlet of compressor 1 and freezing evaporator 6 between the inlets, the upstream end of the defrosting branch 11 is connected to the outlet of the compressor 1 through the first two-position three-way valve 2, and the downstream end is connected between the one-way valve 5 and the refrigeration evaporator 6; it also includes a controller 12, the freezer wall temperature sensor 13 arranged on the surface of the freezer evaporator 6 connec...

Embodiment 2

[0035] Such as figure 2As shown, the hot gas defrosting system of a refrigerator in this embodiment is used in an air-cooled refrigerator, including a compressor 1, a condenser 3, a first capillary tube 4, a one-way valve 5, a freezing evaporator 6 and a liquid accumulator connected in sequence 10. The accumulator 10 is also connected to the compressor 1; the hot gas defrosting system includes a defrosting branch 11, which is connected in parallel between the outlet of the compressor 1 and the inlet of the refrigerating evaporator 6, and the defrosting branch The upstream end of 11 is connected to the outlet of compressor 1 through the first two-position three-way valve 2, and the downstream end is connected between the one-way valve 5 and the refrigeration evaporator 6; it also includes a controller 12, the arrangement connected with the controller 12 The freezer wall temperature sensor 13 on the surface of the freezer evaporator 6, the compressor suction temperature sensor ...

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Abstract

The invention provides a hot air defrosting system for a refrigerator and a control method of the hot air defrosting system. The system comprises a defrosting branch. The defrosting branch is connected between an outlet of a compressor and an inlet of a freezing evaporator in parallel. The system further comprises a controller, a freezing chamber wall temperature sensor connected with the controller and arranged on the surface of the freezing chamber evaporator, a compressor suction temperature sensor arranged on the surface of a compressor suction pipeline, and a second two-position three-way valve arranged on an outlet of the freezing chamber evaporator. A first two-position three-way valve is also connected with the controller. The system further comprises a second capillary pipe, and the second capillary pipe is independently connected to the position behind the freezing evaporator and in front of a refrigerating evaporator in parallel through the second two-position three-way valve, or connected with the refrigerating evaporator in series and then connected to the position behind the freezing evaporator and in front of a liquid storage device in parallel through the second two-position three-way valve. The invention further provides the control method. By the adoption of the hot air defrosting system and the control method, the refrigerating evaporator of the refrigerator is complete in defrosting operation, defrosting energy consumption is low, defrosting time is short, and the temperature rise of a freezing room is small.

Description

technical field [0001] The invention belongs to the technical field of defrosting of refrigerators, and in particular relates to a hot gas defrosting system of a refrigerator and a control method thereof. Background technique [0002] When the air containing water vapor in the refrigerator flows through the evaporator, since the temperature indicated by the evaporator is mostly below 0°C, the water vapor will adhere to the surface of the evaporator and frost will form. As the refrigeration process progresses, the thickness of the frost layer will further increase, resulting in The thermal resistance between the evaporator and the air in the freezer increases, which reduces the heat transfer coefficient of the evaporator and affects the heat transfer of the evaporator, thus reducing the cooling efficiency and affecting the cooling effect of the refrigerator. Power consumption, so the refrigerator should be defrosted in time. [0003] At present, most direct cooling refrigera...

Claims

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Application Information

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IPC IPC(8): F25B47/02F25D29/00
CPCF25B47/02F25B47/025F25D21/06
Inventor 陈旗晏刚周敏
Owner 盐城市临海纺织染整科技有限公司
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