Frequency transformer air conditioner
A technology for frequency converters and air conditioners, which is applied to refrigerators, space heating and ventilation, heating methods, etc., and can solve problems such as insufficient identification of system failures or damage causes, storage, and inability to store data in non-volatile memory.
Inactive Publication Date: 2007-04-11
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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Problems solved by technology
[0003] In the air conditioner of Patent Document 1 mentioned above, when the overcurrent detection unit is damaged, not only data cannot be stored in the nonvolatile memory, but also the nonvolatile memory may be damaged, and the data in the nonvolatile memory cannot be read.
In addition, the operation of the compressor and inverter is closely related to load fluctuations, voltage fluctuations, and external air temperature fluctuations, but these factors are not stored in association with the abnormal state (overcurrent) of the compressor. cause of failure or damage is insufficient
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[0027] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
[0028] Fig. 1 is a block diagram showing the structure of an embodiment of an air conditioner with data retention and display functions when the frequency converter system 17 breaks down and is lost, and 1 is a pair of blades used for heat dissipation in the frequency converter system 17 of the air conditioner The blade temperature detection unit for temperature detection, the motor of the compressor 6 is driven by the control of the DC voltage inverter; 2 is the DC voltage detection unit for detecting the DC voltage supplied for the inverter control; 3 is the detection unit flowing through the compressor The current in the motor current detection unit.
[0029] The inverter control unit 4 stores control data for driving the compressor 6 in the microcomputer, and transmits or receives detected blade temperature, DC voltage, motor current values, and motor control dat...
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To improve service property by facilitating the analysis for failure or breakage cause of an air conditioner. The air conditioner comprises an outdoor unit 15 having an inverter system 17 for inverter-controlling a compressor 6 and a drive motor, an indoor unit 14 connected to the outdoor unit, a signal line and a pipe, and a remote control 13 for communicating with the indoor unit to perform setting of room temperature. The inverter system 17 includes a fin temperature detection means 1 for detecting the temperature of a radiation fin for performing the heat radiation of the inverter system 17, a DC voltage detection means 2 for detecting the DC voltage supplied for the inverter control, a motor current detection means 3 for detecting the operating current of the compressor, and an abnormality detection means 5 for detecting abnormality based on the value of at least any one of the temperature of the radiation fin, the DC voltage and the operating current. In this air conditioner, the temperature of the radiation fin, the DC voltage and the operation current are stored.
Description
technical field [0001] The present invention relates to an air conditioner using a frequency converter, which is suitable for finding out the cause when a system fails or is damaged. Background technique [0002] In the prior art, an overcurrent detection unit is used to detect overcurrent, which is one of the abnormal conditions of the air conditioner, and the detection frequency and the motor frequency at the time of overcurrent are stored in a non-volatile memory and displayed on a remote control. It is known, for example, as described in Patent Document 1: Japanese Unexamined Patent Publication No. Hei 07-174387. [0003] In the air conditioner disclosed in Patent Document 1, when the overcurrent detection unit is damaged, not only data cannot be stored in the nonvolatile memory, but also the nonvolatile memory may be damaged, making it impossible to read data in the nonvolatile memory. In addition, the operation of the compressor and inverter is closely related to load...
Claims
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IPC IPC(8): F24F11/02F25B49/02
Inventor 大石孝栗田佳明安藤达夫山田宪昭
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC