Variable-frequency air conditioner and pressure detection method and device thereof

Abstract

The invention discloses a pressure detection method of a variable-frequency air conditioner. The pressure detection method includes the following steps of receiving a user instruction, controlling the variable-frequency air conditioner to enter the pressure detection mode according to the user instruction, making the variable-frequency air conditioner run according to preset control parameters after the variable-frequency air conditioner enters the pressure detection mode, detecting the current indoor and outdoor environment temperature, detecting the system pressure value of the variable-frequency air conditioner, obtaining the current running mode of the variable-frequency air conditioner according to the user instruction, obtaining the system pressure threshold value of the variable-frequency air conditioner according to the current indoor and outdoor environment temperature and the current running mode of the variable-frequency air conditioner, and judging whether the system pressure of the variable-frequency air conditioner is in the normal state or not according to the system pressure threshold value and the system pressure value. By means of the pressure detection method, whether the system pressure of the variable-frequency air conditioner is in the normal state or not can be accurately judged, and the method is simple and reliable. The invention further discloses a pressure detection device of the variable-frequency air conditioner and the variable-frequency air conditioner.

Description

technical field [0001] The invention relates to the technical field of frequency conversion air conditioners, in particular to a pressure detection method for a frequency conversion air conditioner, a pressure detection device for a frequency conversion air conditioner and an frequency conversion air conditioner. Background technique [0002] At present, when the household inverter air conditioner is being repaired and tested, even if the system pressure has been obtained, it cannot be well judged whether the system pressure of the inverter air conditioner is abnormal. The reasons are as follows: [0003] 1. The frequency of the inverter air conditioner is variable. The higher the frequency, the greater the system pressure; vice versa. That is, the operating frequency of the compressor determines the uncertainty of the system pressure. [0004] 2. The uncertainty of the outdoor ambient temperature leads to changes in the system pressure. Generally, the higher the outdoor a...

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Problems solved by technology

[0004] 2. Uncertain outdoor ambient temperature leads to changes in system pressure

[0007] The above four points determine that the system pressure of the inverter air conditioner is uncertain. Therefore, even if the system pressure of the inverter air conditioner can be read normally, it cannot be determined whether the system pressure is in a normal state, which brings inconvenience to maintenance and testing.

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