JPS6154126U

JPS6154126U -

Info

Publication number: JPS6154126U
Application number: JP13858584U
Authority: JP
Priority date: 1984-09-14
Filing date: 1984-09-14
Publication date: 1986-04-11

Description

[Brief explanation of the drawing]

第１図はこの考案に係る空気調和機の一実施例
を示す図、第２図は上記空気調和機の運転制御系
統を簡略的に示す図、第３図は上記空気調和機に
よる暖房運転時の流れを示すフローチヤート、第
４図は空気調和機の運転時間と電流値（インバー
タ電流）との関係を示すグラフ、第５図は従来の
ヒートポンプ式空気調和機を示す冷凍サイクル図
、第６図は従来の空気調和機における運転時間と
室外側熱交換器側の（冷媒）温度との関係を示す
グラフである。１０…冷凍サイクル、１１…コンプレツサ、１
２…四方弁、１３…室内側熱交換器、１５…室外
側熱交換器、１６…インバータ、２０…トランジ
スタモジユール、２１…制御装置、２２…トラン
ジスタドライブ回路、２３…電流検出センサ、２
４…電流検出回路、２５…周波数決定回路、２６
…室温センサ、２７…室温設定器、２８…除霜検
出回路。 Fig. 1 is a diagram showing an embodiment of the air conditioner according to this invention, Fig. 2 is a diagram schematically showing the operation control system of the air conditioner, and Fig. 3 is a diagram showing the heating operation of the air conditioner. Figure 4 is a graph showing the relationship between operating time and current value (inverter current) of the air conditioner, Figure 5 is a refrigeration cycle diagram showing a conventional heat pump air conditioner, and Figure 6 is a flowchart showing the flow of the process. The figure is a graph showing the relationship between operating time and (refrigerant) temperature on the outdoor heat exchanger side in a conventional air conditioner. 10... Refrigeration cycle, 11... Compressor, 1
2... Four-way valve, 13... Indoor heat exchanger, 15... Outdoor heat exchanger, 16... Inverter, 20... Transistor module, 21... Control device, 22... Transistor drive circuit, 23... Current detection sensor, 2
4... Current detection circuit, 25... Frequency determination circuit, 26
... Room temperature sensor, 27... Room temperature setting device, 28... Defrost detection circuit.

Claims

[Claims for Utility Model Registration] 1. An air conditioner in which the operation of a compressor is controlled at variable speed by an inverter and the cooling/heating capacity is variable, comprising: a current detection sensor for detecting the inverter current; and a current detection sensor for detecting the inverter current; and a control device that is set according to the air conditioning load, and the control device is set to enter defrosting operation when the detected value detected by the current detection sensor becomes equal to or less than the defrosting start setting value. An air conditioner characterized by: 2. The control device includes a frequency determining circuit that determines the operating frequency of the compressor based on the room temperature detection signal from the room temperature sensor and the room temperature setting signal from the room temperature setting device;
A transistor drive circuit that operates the inverter according to the output signal from this determination circuit, a current detection circuit that detects the inverter current, and a calculation that calculates the inverter current detection signal from this detection circuit and the output signal from the frequency determination circuit. and a defrosting detection circuit that outputs a defrosting operation command signal in accordance with the result of the defrosting operation. 3. The frequency determining circuit is configured to determine the operating frequency of the compressor based on the room temperature detected by the room temperature sensor and the difference between this room temperature and the set temperature from the room temperature setting device.
Air conditioners listed in section. 4. The air conditioner according to claim 1, wherein the current detection sensor is provided on the primary side of the inverter to detect the primary side current of the inverter. 5. The defrosting start setting value is set to a value obtained by determining the current average value from the current value detected at each predetermined time interval by the current detection sensor, and subtracting a certain value from this average value. The air conditioner according to item 1.