Control method of frequency conversion air conditioner

Abstract

The invention belongs to the technical field of air conditioner, particularly relates to a control method of a frequency conversion air conditioner, and aims to solve the problem that an existing airconditioner system with a waste heat recovery function is poor in energy-saving effect. In order to achieve the aim, the control method of the frequency conversion air conditioner can determine a frequency mode of a frequency conversion pump according to the running conditions of different branch circuits, so that an energy-saving effect of the air conditioner is improved conveniently on the basisof meeting the basic operating running demand and the hot water heating demand of the air conditioner and realizing waste heat recovery through the frequency conversion running of the frequency conversion pump. Besides, according to the control method provided by the invention, whether the frequency of the frequency conversion pump needs to be lowered or not is determined according to the currentfrequency mode of the frequency conversion pump and the frequency change of a compressor, and under the circumstance that the frequency of the frequency conversion pump needs to be lowered, corresponding frequency lowering schemes are executed aiming at different frequency modes of the frequency conversion pump, so that the energy-saving effect of the air conditioner is optimized and improved again.

Description

Technical field [0001] The invention belongs to the technical field of air conditioners, and specifically relates to a control method of a frequency conversion air conditioner. Background technique [0002] Due to the hot weather in summer, people’s water consumption will increase accordingly, and the city’s water and electricity supply will increase. Because the temperature requirement of water in summer is not very high, in the era of energy shortage, if the waste heat generated by air conditioning is used for heating Domestic water meets people's daily needs, which not only avoids the consumption of gas and other energy sources with hot water, but also makes a certain contribution to improving the global greenhouse effect. [0003] An air conditioning system is now provided. Compared with existing air conditioners, the air-conditioning system includes a circulating hot water exchange circuit that can absorb waste heat from the air conditioner and heat hot water, and a non-circu...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the energy-saving effect of the air-conditioning system with waste heat recovery function is not good, the present invention provides a control method for an inverter air conditioner, the inverter air conditioner includes a compressor , an electronic expansion valve, an evaporator, a condenser, and a water exchange circuit, the compressor, the electronic expansion valve, the evaporator, and the condenser form a closed-loop refrigerant circulation system, and the water exchange circuit includes a first The heat exchange branch, the second heat exchange branch, the frequency conversion pump and the valve assembly, the water storage device is arranged on the first heat exchange branch, the water supply device and the drainage device are arranged on the second heat exchange branch, and the Any one of the first heat exchange branch and the heat exchange branch can be communicated with the frequency conversion pump, and the condenser flows through the first heat exchange branch or the second heat exchange branch The water heat dissipation, the valve assembly can switch the water exchange circuit between the first heat exchange branch and the second heat exchange branch, and the variable frequency pump controls the first heat exchange branch or For the flow state of water in the second heat exchange branch, the control method includes: obtaining the frequency mode of the frequency conversion pump; obtaining the frequency change of the compressor; according to the frequency mode of the frequency conversion pump and the Changes in the frequency of the above-mentioned compressor, so that the variable-frequency pump selectively operates in a corresponding reduced-frequency mode

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