A control method for increasing the enthalpy of return air of water-cooled multi-connection units
A control method and multi-connection technology, which is applied to control input related to air characteristics, refrigerators, heating and ventilation control systems, etc., can solve problems such as low return air enthalpy, insufficient heating capacity, and attenuation of heating capacity
Active Publication Date: 2019-08-20
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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Problems solved by technology
During heating operation, if the water temperature is too low, the return air enthalpy will be low, and the heating capacity will attenuate significantly
Especially in the case of ground source water or low temperature water, it is easy to cause insufficient heating capacity
Method used
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[0039] The present invention provides a control method for water-cooled multi-machine heating, now refer to figure 2 , figure 2 A flow chart showing a control method for water-cooled multi-system heating in some embodiments, such as figure 2 As shown, a control method for water-cooled multi-machine heating is disclosed.
[0040] Among them, the above-mentioned control method involves the structure of water-cooled multi-line, now refer to figure 1 , figure 1 A schematic structural diagram of a water-cooled multi-connector is shown, and the water-cooled multi-connector includes: an outdoor unit 7 and an indoor unit 1, and the outdoor unit 7 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 7 inclu...
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The invention provides a control method for enthalpy increase by return air of a water-cooled multi-split air conditioner, and relates to the technical field of air conditioning equipment. The control method comprises the following steps: after the water-cooled multi-split air conditioner is used for heating, detecting the pressure of an air suction port of a compressor, and determining the corresponding saturation temperature Ts of the pressure of the air suction port of the compressor; determining the temperature Tb of the return air in an undercooled outlet pipe; and adjusting the opening of a second electronic expansion valve according to the formula that deltaT=Tb-Ts-K till the deltaT is equal to 0, wherein K refers to the return air superheat degree. According to the control method, a liquid, which returns to outdoor units after being heated, is deeply undercooled, so that the heat exchange capability is improved, and the enthalpy value of the return air during the heating process is increased.
Description
technical field [0001] The invention relates to the technical field of air conditioning equipment, in particular to a control method for increasing enthalpy of return air of water-cooled multi-connected units. 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. Water-cooled multi-connector makes up for the deficiency of air-cooled multi-connector. It has low noise and requires little installation space. It not only has the advantages of easy control and management of air-cooled models, but also has higher energy efficiency than air-cooled multi-connector. In high-level projects, start to use gradually. [0003] The water-cooled multi-split unit is composed of one or more outdoor units and multiple indoor unit systems in...
Claims
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Login to View More IPC IPC(8): F24F11/00F25B49/02F24F110/10
Inventor 刘志胜任善军毛守博何建奇吴文涛
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD