Inverter air conditioner heating start control method, control system and air conditioner
A variable frequency air conditioner and control system technology, applied in heating and ventilation control systems, heating methods, space heating and ventilation, etc. The effect of solving the problem of insufficient commutation and improving the comfort of use
Active Publication Date: 2017-08-01
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide an inverter air conditioner heating start control method, control system and its air conditioner, which solve the technical problems of the four-way valve reversing pressure difference in the prior art, which takes a long time to establish and the heating start is slow
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[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0029] like figure 1 As shown, it is a schematic flow chart of an inverter air conditioner heating start-up control method according to the present invention. The heating start-up control method is especially suitable for heating start-up operation at low temperature, and includes the following steps:
[0030] Step 1, turn off the fixed-speed compressor of the inverter air conditioner, turn on the inverter compressor of the inverter air conditioner, and control the frequency of the inverter compressor to increase.
[0031] Step 2, when the frequency of the variable frequency compressor rises to the first frequency Fa, turn on the fixed speed compressor, and the variable frequency compressor maintains the first frequ...
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The invention relates to the technical field of air conditioning, in particular to a heating start control method and system for a variable-frequency air conditioner and the air conditioner. In heating start, especially, low-temperature heating start of an air-conditioning system, before a four-way valve conducts reversing and after a variable-frequency compressor is started and reaches a certain frequency, a constant-speed compressor is controlled to be started and operate for a period of time, and then differential pressure for reversing of the four-way valve can be rapidly built to complete the four-way valve reversing process needed by heating operation. After the four-way valve conducts reversing, the constant-speed compressor is controlled to be stopped, then the variable-frequency compressor is controlled to continue to complete follow-up frequency increasing motion according to a target frequency, and the constant-speed compressor is controlled to be started or stopped according to the heating capacity of an indoor unit and the heating demand. According to the heating start control method and system for the variable-frequency air conditioner, the sequence of starting of the constant-speed compressor and reversing of the four-way valve is changed; the starting differential pressure of the four-way valve can be rapidly built, and the problem of improper four-way valve reversing is solved; rapid low-temperature heating can be achieved, and the use comfort of users is improved.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a heating start control method and control system of an inverter air conditioner and an air conditioner thereof. Background technique [0002] Conventional heat pump air conditioner outdoor units in the prior art usually include a variable frequency compressor and at least one fixed speed compressor. When the air-conditioning system is in cooling operation, the four-way valve is in a power-off state. After being compressed by the compressor, the refrigerant passes through the outdoor heat exchanger and then throttles through the expansion valve, and then flows into the indoor unit through the liquid side stop valve. After heat exchange in the indoor unit, the refrigerant returns to the outdoor unit through the gas side shut-off valve, and then is sucked into the compressor through the four-way valve and the low-pressure tank to complete a cycle. When the air conditionin...
Claims
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IPC IPC(8): F24F11/00
CPCF24F11/70
Inventor 李洪生许永锋梁伯启肖俊钊吴孔祥卢健洪
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD