A control method for water-cooled multi-line refrigeration

A control method, multi-connection technology, applied in the control input involving air characteristics, space heating and ventilation control input, heating mode, etc. And other issues

Active Publication Date: 2019-08-20
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only the high pressure of the system cannot reach the required value during low-temperature refrigeration operation, but also because the heat transfer capacity of the condenser is too large during low-temperature refrigeration, resulting in the low enthalpy value of the refrigerant supplied to the internal unit and the high heat absorption capacity. When the indoor temperature is not too high, The internal unit is prone to low evaporation pressure and evaporator freezing, which affects the reliable and continuous operation of the system

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  • A control method for water-cooled multi-line refrigeration
  • A control method for water-cooled multi-line refrigeration

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Embodiment Construction

[0039] The invention provides a water-cooled multi-line unit and its refrigeration control method, now refer to figure 1 and figure 2 , figure 1 It shows a schematic structural view of the water-cooled multi-line in some embodiments, figure 2 A flow chart of a control method for water-cooled multi-line refrigeration in some embodiments is shown.

[0040] Such as figure 1 As shown, a water-cooled multi-connection unit is disclosed, and the water-cooled multi-connection unit includes: an outdoor unit 23 and an indoor unit 1, and the outdoor unit 23 and the indoor unit 1 are connected to multiple indoor units through connecting pipes of the indoor and outdoor units;

[0041] The indoor unit 1 includes a plurality of indoor heat exchangers, including the first indoor heat exchanger 2, the second indoor heat exchanger 3 and the third indoor heat exchanger 4; the outdoor unit 23 includes: a compressor 12, an oil separator 11, Check valve 10, four-way valve 7, outdoor heat exch...

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Abstract

The invention provides a control method for refrigerating of a water-cooled multi-split air conditioner, and relates to the technical field of refrigerating. The control method comprises the following steps: detecting the pressure of an exhaust port of a compressor; determining the corresponding saturation temperature of the pressure of the exhaust port of the compressor according to the pressure of the exhaust port of the compressor, and comparing the corresponding saturation temperature of the pressure of the exhaust port of the compressor with the preset temperature; and if the corresponding saturation temperature of the pressure of the exhaust port of the compressor is lower than the preset temperature, opening a bypass valve and adjusting the opening of a first electronic expansion valve till the corresponding saturation temperature of the pressure of the exhaust port of the compressor is higher than the preset temperature. Through the adoption of the control method provided by the invention, high pressure of a system can be increased, and the operating stability of the system is improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a control method for water-cooled multi-line refrigeration. Background technique [0002] With the development of the economic level, more and more high-rise and large public buildings have emerged in China. In some high-rise buildings, the application of air-cooled multi-split units is often limited due to excessively long piping and insufficient installation space. The water-cooled multi-connector makes up for the deficiency of the air-cooled multi-connector. It has low noise and requires less installation space. It not only has the advantages of easy control and management of the air-cooled model, but also has higher energy efficiency than the air-cooled multi-connector. In projects with high energy-saving requirements, it should be used gradually. [0003] The water-cooled multi-split unit is composed of one or more outdoor units and multiple indoor unit systems insta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/64F24F110/10
Inventor 刘志胜任善军杨志伟毛守博何建奇国德防
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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