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Defrosting control method and device, air cooler and refrigeration house

A control method and refrigerant flow technology, applied in the fields of air coolers and cold storage, control devices, and defrosting control methods, can solve problems such as energy waste, inability to effectively control warehouse temperature, frequent entry and exit of air coolers into and out of defrosting mode, etc. To achieve the effect of temperature control and energy saving

Active Publication Date: 2021-12-31
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the cold storage environment, due to the fixed defrosting parameters of these defrosting methods, it is easy to cause the air cooler to enter and exit the defrosting mode frequently, which not only cannot effectively control the temperature of the warehouse, but also easily causes energy waste

Method used

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  • Defrosting control method and device, air cooler and refrigeration house
  • Defrosting control method and device, air cooler and refrigeration house
  • Defrosting control method and device, air cooler and refrigeration house

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] see figure 1 , the defrosting control method in the present embodiment comprises the following steps:

[0084] S101: Obtain the cooling time and / or latent heat time of the evaporator according to the heat exchange state parameter representing the heat exchange capacity of the evaporator;

[0085] S102: Adjust defrosting parameters of the evaporator according to the refrigeration time and / or latent heat time.

[0086] Among them, the cooling time and latent heat time are the state parameters of the evaporator in the process from cooling to frosting. The time from frosting moment to defrosting moment. Refrigeration time reflects the difficulty of evaporator frosting, and latent heat time reflects the rate of evaporator frosting.

[0087] One of the main factors affecting refrigeration time is relative humidity.

[0088] In this embodiment, the refrigerating time is from the time when the cooling fan unit (equivalent to the evaporator of the cold storage) just reaches ...

Embodiment 2

[0101] see figure 2 , the detection refrigeration time in the present embodiment comprises the following steps:

[0102] S201: judging whether the current evaporator temperature reaches the set temperature;

[0103] S202: If the temperature of the evaporator reaches the set temperature, the refrigeration time starts counting;

[0104] S203: comparing the flow rate of the refrigerant flowing through the evaporator with the preset flow rate;

[0105] S204: If the refrigerant flow rate is less than the preset flow rate, start counting the latent heat time;

[0106] S205: If the flow rate of the refrigerant is not less than the preset flow rate, the cooling time and latent heat time end counting.

[0107] see also image 3 , the preset flow rate is the refrigerant flow rate in the evaporator pipeline under normal cooling conditions, that is, the flow rate value when the evaporator reaches the target temperature in the frost-free state, corresponding to image 3 Q2 in. The v...

Embodiment 3

[0123] see Figure 4 , in this embodiment, adjusting the defrosting parameters of the evaporator through the cooling time may include:

[0124] S301: Determine whether the cooling time is less than the preset cooling time; if yes, execute S302; if not, execute S303;

[0125] S302: If the cooling time is less than the preset cooling time, increase the defrosting time of the evaporator in this cycle;

[0126] S303: If the cooling time is not less than the preset cooling time, reduce the defrosting time of the evaporator in this cycle.

[0127] In this embodiment, the defrosting parameter is defrosting time.

[0128] As mentioned above, the longer the cooling time of the evaporator, the less likely it is to frost, and the shorter the cooling time, the easier it is to frost. Therefore, if the cooling time is long, reduce the defrosting time of the evaporator in this cycle; if the cooling time is short, extend the defrosting time. For example, this method can be used on the coo...

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Abstract

The invention provides a defrosting control method and device, an air cooler and a refrigeration house. The defrosting control method comprises the steps that the refrigeration time and / or the latent heat time of an evaporator are / is obtained according to heat exchange state parameters representing the heat exchange capacity of the evaporator, and the defrosting parameters of the evaporator are adjusted according to the refrigeration time and / or the latent heat time, wherein the refrigeration time is the duration from the moment when the temperature of the evaporator reaches the set temperature to the defrosting moment, and the latent heat time is the duration from the frosting moment of the evaporator to the defrosting moment. The defrosting parameters of the air cooler are adjusted according to the heat exchange state parameters, reasonable defrosting of the air cooler is guaranteed, the temperature of the refrigeration house is effectively controlled, and energy is saved.

Description

technical field [0001] The present disclosure relates to the refrigeration field, in particular to a defrosting control method, a control device, a cooling fan and a cold storage. Background technique [0002] Air coolers are mostly used in freezing and cold storage environments, especially cold storage. At present, the diversification of storage items in the warehouse has higher and higher requirements for storage temperature matching. However, in a refrigeration environment such as a cold storage, there are still problems such as inaccurate control of the suitable temperature of the goods and unreasonable defrosting parameter settings, which affect the storage quality of the goods. [0003] In the existing defrosting technology, a fixed defrosting cycle or defrosting time is used to enter or exit defrosting, or the defrosting time is determined by setting the defrosting entry / exit temperature according to the temperature of the external unit coil. For the cold storage env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D29/00F25D21/06F25D17/06F25D13/00
CPCF25D29/00F25D21/06F25D17/06F25D13/00
Inventor 徐豪昌谢斌斌肖福佳何腾宗张俊生姚亚明
Owner GREE ELECTRIC APPLIANCES INC