Title:
AIR CONDITIONER AND METHOD FOR DETECTING AMOUNT OF REFRIGERANT IN AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2011/070917
Kind Code:
A1
Abstract:
Provided are an air conditioner and a method for detecting the amount of refrigerant in the air conditioner, wherein the amount of refrigerant charge can be consistently detected with high accuracy, without providing a heating unit on a liquid level detection circuit. An air conditioner (1) to which an outdoor unit (2) and an indoor unit (3) are connected, is provided with a liquid level detection circuit (30) wherein an opening and closing valve (33) and a decompression mechanism (32) are provided on a bypass circuit (31) that connects a predetermined height position within a receiver (15) to the suction side of a compressor (10); a temperature detection unit (34) for detecting the temperature of refrigerant which passes through the liquid level detection circuit (30) and which is decompressed by a decompression mechanism (32); and a refrigerant amount detection unit (35) which controls an intermediate pressure within the receiver (15) to a pressure at which the superheated temperature is at least 5 degrees higher than the temperature of a low-pressure saturated gas, and a saturated gas line extends diagonally to the upper right in a pressure-enthalpy diagram, said refrigerant amount detection unit detecting the temperature of refrigerant transferred from the receiver (15) to the liquid level detection circuit (30) with a temperature detection unit (34) so as to determine the amount of refrigerant charge on the basis of the temperature.
Inventors:
KATO, Takahiro (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
加藤 隆博 (〒15 東京都港区港南二丁目１６番５号 三菱重工業株式会社内 Tokyo, 〒1088215, JP)
加藤 隆博 (〒15 東京都港区港南二丁目１６番５号 三菱重工業株式会社内 Tokyo, 〒1088215, JP)
Application Number:
JP2010/071064
Publication Date:
June 16, 2011
Filing Date:
November 25, 2010
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES, LTD. (16-5, Konan 2-chome Minato-k, Tokyo 15, 〒1088215, JP)
三菱重工業株式会社 (〒15 東京都港区港南二丁目１６番５号 Tokyo, 〒1088215, JP)
KATO, Takahiro (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
三菱重工業株式会社 (〒15 東京都港区港南二丁目１６番５号 Tokyo, 〒1088215, JP)
KATO, Takahiro (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
International Classes:
F25B45/00; F25B49/02
Attorney, Agent or Firm:
FUJITA, Takaharu et al. (37F The Landmark Tower Yokohama, 2-2-1 Minatomirai, Nishi-ku, Yokohama-sh, Kanagawa 37, 〒2208137, JP)
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