JPH0258664U

JPH0258664U -

Info

Publication number: JPH0258664U
Application number: JP13813388U
Authority: JP
Priority date: 1988-10-25
Filing date: 1988-10-25
Publication date: 1990-04-26

Description

[Brief explanation of drawings]

第１図は本考案に関わる冷凍サイクルのブロツ
ク図、第２図は本考案の第１実施例に関わる温度
自動膨張弁の断面図、第３図は第２実施例に係わ
る温度自動膨脹弁の断面図、第４図は第１実施例
における温度自動膨張弁の蒸発器出口過熱度と熱
負荷および総合開口面積との関係を示したグラフ
、第５図は従来の冷凍サイクルのブロツク図、第
６図は従来の温度自動膨張弁の断面図、第７図は
温度自動膨張弁の弁開度の応答性を表すフイード
バツクブロツク図、第８図は容量可変型圧縮機の
吸入圧力の応答特性を表すフイードバツクループ
のブロツク図である。１……容量可変型圧縮機、２……凝縮器、３…
…受液面、５……蒸発器、１５……バイパス流路
、１６……温度自動膨脹弁、１７……本体ケース
、１８……蒸発器出口冷媒感温通路、１９……凝
縮器出口側通路、２０……蒸発器入口側通路、２
１……主オリフイス、２２……バイパスオリフイ
ス、２３……第１空所、２４……ダイヤツフラム
ケース、２５……第２上方空所、２６……ダイヤ
フラム、２７……ダイヤフラム台座、２８……感
温連結棒、２９……ボール弁、３０……ボール弁
台座、３１……スプリング、３２……スプリング
保持プラグ、３５……第２上方空所、３６……ノ
ツチ。 Figure 1 is a block diagram of a refrigeration cycle according to the present invention, Figure 2 is a sectional view of a thermostatic expansion valve according to the first embodiment of the invention, and Figure 3 is a diagram of a thermostatic expansion valve according to the second embodiment. 4 is a graph showing the relationship between the degree of superheating at the evaporator outlet, the heat load, and the total opening area of the thermostatic expansion valve in the first embodiment. FIG. 5 is a block diagram of a conventional refrigeration cycle. Figure 6 is a cross-sectional view of a conventional thermostatic expansion valve, Figure 7 is a feedback block diagram showing the response of the valve opening of the thermostatic expansion valve, and Figure 8 is the suction pressure response of a variable capacity compressor. FIG. 2 is a block diagram of a feedback loop showing characteristics. 1... variable capacity compressor, 2... condenser, 3...
... Liquid receiving surface, 5 ... Evaporator, 15 ... Bypass flow path, 16 ... Temperature automatic expansion valve, 17 ... Main body case, 18 ... Evaporator outlet refrigerant temperature-sensitive passage, 19 ... Condenser outlet side Passage, 20...Evaporator inlet side passage, 2
DESCRIPTION OF SYMBOLS 1... Main orifice, 22... Bypass orifice, 23... First cavity, 24... Diaphragm case, 25... Second upper cavity, 26... Diaphragm, 27... Diaphragm pedestal, 28... ... Temperature-sensitive connecting rod, 29 ... Ball valve, 30 ... Ball valve pedestal, 31 ... Spring, 32 ... Spring holding plug, 35 ... Second upper cavity, 36 ... Notch.

Claims

[Claims for Utility Model Registration] 1. A reduced-pressure refrigerant flow path in which refrigerant is pressure-fed from a variable-capacity refrigerant compressor whose discharge capacity can be controlled and liquefied by a condenser, is decompressed by a pressure reducer, and is guided to an evaporator. A refrigerant flow rate stabilizing structure comprising: a bypass flow path that guides the liquefied refrigerant to the evaporator by bypassing the pressure reducer. 2. A reduced-pressure refrigerant flow path in which refrigerant is pressure-fed from a variable-capacity refrigerant compressor whose discharge capacity can be controlled and is liquefied by a condenser, and the pressure is reduced by an automatic temperature expansion valve and the liquefied refrigerant is guided to an evaporator. A refrigerant flow rate stabilizing structure comprising: a bypass flow path that bypasses the automatic temperature expansion valve and leads to the evaporator. 3. A reduced-pressure refrigerant flow path that pressure-feeds the refrigerant from the variable-capacity refrigerant compressor whose discharge capacity can be controlled and liquefies it in the condenser through a temperature-controlled expansion valve and guides it to the evaporator; and a valve of the temperature-controlled expansion valve. A refrigerant flow rate stabilization method characterized by having a bypass notch passage provided with a notch in the seat, through which the liquefied refrigerant bypasses the thermostatic expansion valve seat and leads to the evaporator. structure.