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A defrosting control method, device and heating unit with adjustable pressure difference

A control method and pressure difference technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of gas or liquid flow, large pressure difference of evaporator, etc., and achieve the effect of improving the stability of equipment

Active Publication Date: 2020-09-22
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a defrosting control method and device with adjustable pressure difference to solve the problem in the prior art that the pressure difference between the evaporators is too large during the defrosting process, resulting in gas or liquid leakage

Method used

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  • A defrosting control method, device and heating unit with adjustable pressure difference
  • A defrosting control method, device and heating unit with adjustable pressure difference
  • A defrosting control method, device and heating unit with adjustable pressure difference

Examples

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Embodiment 1

[0055] figure 1 is a flowchart of a defrosting control method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0056]Step S101, detecting the first pressure value of the evaporator in the defrosting state and the second pressure value of the evaporator in the non-defrosting state;

[0057] Step S102, adjusting the air intake rate of the evaporator in the non-defrosting state according to the first pressure value and the second pressure value.

[0058] In this embodiment, the specific implementation manner of detecting the first pressure value and the second pressure value is as follows: a first pressure sensor is provided at the outlet end of each evaporator, and the first pressure sensor is used to detect the first pressure value. a pressure value and said second pressure value;

[0059] In the present invention, the heating unit can include two or more evaporators, and multiple evaporators perform d...

Embodiment 2

[0079] figure 2 is a structural block diagram of a defrosting control device according to an embodiment of the present invention, such as figure 2 As shown, the device includes:

[0080] The first pressure sensor 10 is arranged at the outlet end of the evaporator for detecting the pressure value at the outlet end of the evaporator;

[0081] The controller 20 is used to detect the first pressure value of the evaporator in the defrosting state and the second pressure value of the evaporator in the non-defrosting state; according to the first pressure value and the second pressure value, to control the opening of the first valve corresponding to the evaporator in the non-defrosting state;

[0082] The first valve 30 is arranged on the inlet pipeline of the evaporator, and is used to control the intake rate of the evaporator.

[0083] specifically, image 3 is a structural block diagram of a controller according to an embodiment of the present invention, such as image 3 A...

Embodiment 3

[0093] This embodiment provides a heating unit, including the above-mentioned defrosting control device, which is used to balance the pressure difference between the evaporator in the defrosting state and the evaporator in the non-defrosting state during the defrosting process, and improve the stability of the equipment. sex.

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Abstract

The invention discloses a defrosting control method and a defrosting control device capable of adjusting the differential pressure as well as a heating unit. The method comprises the following steps of detecting a first pressure value of an evaporator in a defrosting state and a second pressure value of the evaporator in a non-defrosting state; and adjusting the air inlet rate of the evaporator inthe non-defrosting state according to the first pressure value and the second pressure value. By use of the defrosting control method and the defrosting control device disclosed by the invention, theair inlet rate of the evaporator is dynamically adjusted along the pressure change, the differential pressure between the evaporator in the defrosting state and the evaporator in the non-defrosting state is balanced in the defrosting process, and the stability of equipment is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a defrosting control method, device and heating unit with adjustable pressure difference. Background technique [0002] As people pay more and more attention to the importance of the environment, the "coal-to-electricity" heating method in the northern region has gradually been promoted, and low-temperature heating equipment has gradually emerged. The low ambient temperature air source heating unit is one of them. [0003] Screw type low ambient temperature air source heating unit is a kind of vapor compression heating equipment, which is composed of screw compressor, finned condenser, shell and tube evaporator, etc. It is suitable for Northeast China, North China, Northwest China and some East China and The southwest region is a severe and cold region. It effectively solves the problem that conventional large-scale screw heat pump units cannot produce heat under low-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B47/02F25B49/02
CPCF25B47/02F25B49/02
Inventor 卓明胜刘洋陈培生程琦钟海玲
Owner GREE ELECTRIC APPLIANCES INC
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