Method for controlling refrigeration of variable frequency air conditioner

A technology of refrigeration control and frequency conversion air conditioner, which is applied in the direction of control input involving air characteristics, space heating and ventilation control input, heating and ventilation control system, etc. It can solve the problem of low-temperature freezing of evaporators, low coil temperature, and unfavorable heat transfer and other issues to achieve the effect of saving air conditioning energy consumption

Active Publication Date: 2018-03-09
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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Problems solved by technology

[0003] During cooling, the part of the evaporator corresponding to the fan that is not turned on does not have a fan to perform air forced convection heat exchange on it, which makes the heat exchange unfavorable, which will lead to a low temperature of the coil, and in extreme cases, the evaporator will freeze at low temperature

Method used

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  • Method for controlling refrigeration of variable frequency air conditioner
  • Method for controlling refrigeration of variable frequency air conditioner
  • Method for controlling refrigeration of variable frequency air conditioner

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Embodiment Construction

[0030] An embodiment of the present invention provides a refrigeration control method for an inverter air conditioner. figure 1 It is a partial structural schematic diagram of an air conditioner indoor unit according to an embodiment of the present invention; figure 2 yes figure 1 The schematic diagram of the refrigeration cycle of the indoor unit of the air conditioner shown; image 3 yes figure 1 The exploded schematic diagram of the air supply structure of the indoor unit of the air conditioner shown; Figure 4 It is a structural schematic diagram of an evaporator of an air conditioner indoor unit according to an embodiment of the present invention. figure 2 Only a few main components of the refrigeration cycle system are shown, Figure 4 The two evaporators are separated by a dotted line.

[0031] Such as Figure 1 to Figure 4 As shown, the indoor unit of the inverter air conditioner includes a casing, two evaporators, two fans, multiple air outlets and multiple sw...

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Abstract

The invention provides a method for controlling refrigeration of a variable frequency air conditioner. The indoor air conditioner comprises two evaporators connected in parallel, two draught fans corresponding to the two evaporators and two air blowout units corresponding to the two draught fans respectively. Each air blowout unit includes at least one air outlet. The refrigeration control methodconsists of the steps that the indoor target temperature Ta, the interior environmental temperature Tb, the outdoor environmental Tc and the coil pipe temperature of two evaporators should be detectedwhile the air conditioner is operating in a refrigeration mode, wherein the lower value of coil pipe temperature is marked as Td; the on-or-off state of the two draught fans is detected; the operating frequency of compressors is determined by Td temperature range and the value of Ta, Tb, Tc if both draught fans are in service; and the operating frequency of compressors is decided by temperature difference range of Tb, Ta and the value of Ta, Tb, Tc if only one draught fan is on. The method not only makes air conditioners capable of meeting the cooling needs, but also protects the evaporatorsfrom frost by controlling the operating frequency of compressors accurately.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a refrigeration control method for an inverter air conditioner. Background technique [0002] Inverter air conditioners usually calculate the real-time operating frequency of the compressor based on the indoor target temperature, indoor ambient temperature, and outdoor ambient temperature set by the remote control. However, some indoor units of air conditioners are provided with two evaporators and two fans connected in parallel to realize air supply in multiple modes. Therefore, it is often the case that only one blower is turned on. [0003] During cooling, the part of the evaporator corresponding to the fan that is not turned on does not have a fan to perform air forced convection heat exchange on it, which makes the heat exchange unfavorable, which will cause the coil temperature to be low, and in extreme cases, the evaporator will freeze at low temperature. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00F24F110/10F24F110/12
CPCF24F11/00
Inventor 刘卫兵吴洪金耿宝寒朱辉刘庆赟贾淑玲杜路明
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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