Defrosting control method for fixed-frequency air conditioner

A control method and air-conditioning technology, applied in heating and ventilation control systems, refrigerators, refrigeration components, etc., can solve the problems of accelerated defrosting efficiency, low efficiency, and single defrosting process.

CN110836476AInactive Publication Date: 2020-02-25QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-02-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a fixed-frequency air conditioner. In order to improve the defrosting efficiency of the fixed-frequency air conditioner, the defrosting control method for the fixed-frequency air conditioner comprises the following steps that under the condition that the fixed-frequency airconditioner is in a heating working condition, the external environment temperature T is detected, and the temperature of an inner coil is detected every preset time; and under the condition that T is smaller than dew point temperature, whether the fixed-frequency air conditioner enters a defrosting mode or not is judged according to the decay speed of the temperature of the inner coil pipe. According to the defrosting control method for the fixed-frequency air conditioner, the temperature change trend of the inner coil pipe is innovatively utilized and combined with the external environmenttemperature for characterizing the frosting degree of an outer unit, and then the time of the air conditioner for entering the defrosting mode is judged, so that the situation that the fixed-frequencyair conditioner frequently enters the defrosting mode is avoided, the defrosting effect is guaranteed, and the user experience is improved.
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Description

Technical field

[0001] The invention belongs to the technical field of air conditioners, and specifically relates to a defrosting control method for fixed frequency air conditioners. Background technique

[0002] As a device that can adjust the indoor ambient temperature, the working principle of the air conditioner is to reduce or increase the indoor ambient temperature through the high-pressure / low-pressure / gas / liquid state conversion of the refrigerant between the circulating pipelines. From the perspective of the indoor unit, the air conditioner is in cooling or heating mode. When the air conditioner is heating, under certain humidity conditions, if the temperature of the outdoor coil is too low, it will cause frosting, and the frosting of the outdoor coil will reduce the heat exchange efficiency of the outdoor heat exchanger, which will affect the air conditioner’s control. Thermal effect reduces the comfort of indoor environment and affects user experience. Therefore, whe...

Examples

Embodiment Construction

[0018] In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Examples. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0019] First refer to figure 1 , figure 1 It is the main flow chart of the defrost control method of the present invention. Such as figure 1 As shown, the defrosting control method for the fixed frequency air conditioner of the present invention includes: S110, when the fixed frequency air conditioner is in heating mode, detecting the external environment temperature T, and detecting the inner coi...