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Multi-split system capable of defrosting alternately without stopping as well as defrosting control method

A multi-connected system, rotating defrosting technology, applied in refrigerators, mechanical equipment, refrigeration components, etc., can solve problems such as high power consumption, shorten the service life of compressors, affect customer experience, etc., to achieve high defrosting efficiency, Simple action and long service life

Active Publication Date: 2018-05-01
ZHEJIANG KING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compressor of the air conditioning unit needs to be started and stopped many times in this scheme. The process of starting and stopping the compressor not only consumes a lot of power, but also frequently starts and stops the compressor and switches the four-way valve, which will reduce the service life of key components such as the compressor.
And when the air conditioner is defrosting in the cooling state, the heat exchanger of the indoor unit will absorb the heat from the inside of the room, seriously affecting the experience of the heat pump
The method of stopping and reversing defrosting not only does not meet the energy saving requirements, but also affects the service life of the unit and seriously affects the customer experience
[0004] Therefore, it is necessary to defrost the unit to maintain the heating effect of the heat pump without prolonging the service life of the unit, but also to continuously ensure the air-conditioning effect, which is the technical problem that the current air-cooled air conditioner needs to solve

Method used

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  • Multi-split system capable of defrosting alternately without stopping as well as defrosting control method
  • Multi-split system capable of defrosting alternately without stopping as well as defrosting control method

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[0045] The multi-connected system of the combination of the two modules shown includes outdoor basic module 1, outdoor basic module 2, multi-connected indoor units of corresponding capacity, and air-conditioning pipelines connecting the indoor and outdoor units in parallel. The outdoor basic module A is set as the main module. Then the outdoor basic module B is a slave module, and the movement process of the unit is:

[0046] S1 unit is powered on;

[0047] S2 unit initialization;

[0048] S3 Heating start, the unit enters the start-up phase;

[0049] S4 The unit enters the normal operation stage;

[0050] The S5 unit continuously detects the outdoor ambient temperature Toa and the outdoor heat exchanger temperature Tdef, and any module satisfies: the outdoor heat exchanger temperature Tdef≤(defrosting temperature Tdef1+environmental correction factor a×outdoor ambient temperature Toa), and t1≥t11, and If there is no defrosting operation module in the system, then the modul...

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Abstract

The invention discloses a multi-split system capable of defrosting alternately without stopping as well as a defrosting control method, and belongs to the technical field of air conditioning. The combined air-cooling variable-frequency multi-split in the prior art needs to stop a compressor and cooperates with the switching state of a four-way valve to defrost, so that the energy-saving requirement is not met, the service life of the machine unit is influenced and the customer experience is seriously influenced. A hot gas bypass device is arranged between a gas discharge port of the variable-frequency compressor and an outdoor condenser liquid pipe; when any one base module of an outdoor unit meets the defrosting requirement, a defrosting electromagnetic valve and an oil balance valve of the module are controlled to be opened, a heating expanding valve assembly is closed and the variable-frequency compressor is started to reach the defrosting frequency; other base modules of the outdoor unit maintain the heating state and the variable-frequency compressor performs defrosting, compensation and frequency increasing. Alternate defrosting without stopping is realized, the four-way reversing valve does not need to be switched to a refrigeration mode and the service life of parts is high; the heating effect of the outdoor unit is not influenced; and the defrosting action is simple, safety and reliability are achieved, and the defrosting efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a multi-connected system and a defrosting control method for non-stop and alternate defrosting. Background technique [0002] Air-cooled air-conditioning units, when heating in winter, during the heat absorption process of the heat pump, because the water vapor in the air gradually condenses on the surface of the outdoor heat exchanger, a thick white layer will form on the surface of the heat exchanger after a long time. Frost will seriously affect the heat exchange effect of the heat exchanger, thereby greatly reducing the heating capacity of the heat pump. And the long-term poor heat exchange can easily damage the key components of the air conditioner. Especially in a multi-connected system, when one drags multiple or multiple drags multiple, the impact is even greater. [0003] In order to ensure the heat exchange efficiency of the outdoor heat exchanger...

Claims

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Application Information

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IPC IPC(8): F25B47/02F25B49/02F25B41/04F25B41/06F25B41/20F25B41/31
CPCF25B47/022F25B49/022F25B2700/2106F25B2700/2117F25B2600/2513F25B2400/06F25B2600/0253F25B41/31F25B41/20
Inventor 陈均云杨平童丽萍张扬裘陆斌陆云剑
Owner ZHEJIANG KING CO LTD
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