空気調和機

Air conditioning equipment

Abstract

PURPOSE: To prevent drop in the heating capacity by improving computing accuracy of the degree of supercooling at an outlet of an outdoor side heat exchanger to control an outdoor side expansion valve to a proper opening during the cooling-based operation in air conditioning equipment using a non- azeotropic mixture refrigerant. CONSTITUTION: A circulation refrigerant composition ratio forecasting means 20 is provided to forecast a composition ratio of a circulation refrigerant based on the height of a liquid surface in an accumulator 6 as detected by a liquid surface height detection sensor 19. Then, during the cooling-based operation, a degree of supercooling computing means 21 computes the degree of outlet supercooling of an outdoor side heat exchanger based on a high pressure side pressure detected by a high pressure side pressure detection sensor 15, an outlet temperature of an outdoor side heat exchanger detected by an outdoor side heat exchanger outlet temperature detection sensor 16 and the composition ratio of the circulation refrigerant forecast by the circulation refrigerant composition ratio forecasting means 20 to control the opening of an outdoor side expansion valve 5 by an outdoor side expansion valve control means 18 based on the results of computation. COPYRIGHT: (C)1996,JPO
(57)【要約】 【目的】 非共沸混合冷媒を用いた空気調和機における 冷房主体運転時に、室外側熱交換器出口過冷却度の演算 精度を向上させ、室外側膨張弁開度を適正開度に制御す ることにより、暖房能力の低下を防止する。 【構成】 液面高さ検知センサー19により検知したア キュームレータ6内の液面高さをもとに循環冷媒の組成 比率を予測する循環冷媒組成比率予測手段20を設け、 冷房主体運転時に、高圧側圧力検知センサー15により 検知した高圧側圧力と、室外側熱交換器出口温度検知セ ンサー16により検知した室外側熱交換器出口温度と、 循環冷媒組成比率予測手段20により予測した循環冷媒 の組成比率とにより過冷却度演算手段21が室外側熱交 換器出口過冷却度を演算し、この演算結果をもとに室外 側膨張弁制御手段18が室外側膨張弁5の開度を制御す る。

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    Publication numberPublication dateAssigneeTitle
    JP-2010175163-AAugust 12, 2010Panasonic Corp, パナソニック株式会社Liquid circulation heating system
    US-8261574-B2September 11, 2012Aisin Seiki Kabushiki KaishaAir conditioning system and accumulator thereof