JP2021021527A - Thermostatic expansion valve and refrigeration cycle system - Google Patents

Thermostatic expansion valve and refrigeration cycle system Download PDF

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JP2021021527A
JP2021021527A JP2019137825A JP2019137825A JP2021021527A JP 2021021527 A JP2021021527 A JP 2021021527A JP 2019137825 A JP2019137825 A JP 2019137825A JP 2019137825 A JP2019137825 A JP 2019137825A JP 2021021527 A JP2021021527 A JP 2021021527A
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temperature
expansion valve
refrigerant
evaporator
type expansion
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JP7347984B2 (en
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裕正 ▲高▼田
裕正 ▲高▼田
Yasumasa Takata
佐藤　祐一
Yuichi Sato
祐一 佐藤
雄一郎 當山
Yuichiro Toyama
雄一郎 當山
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures

Abstract

To provide a thermostatic expansion valve capable of controlling a refrigerant state at an evaporation outlet to make refrigerant wet steam stably with a simple configuration, and a refrigeration cycle system.SOLUTION: A refrigeration cycle system comprises an evaporator 40 that cools a heating element 100 to be cooled, and a thermostatic expansion valve 10. The thermostatic expansion valve 10 sets a "static superheat degree" (SSH) to a lower temperature side than a refrigerant saturation line so that an outlet refrigerant of the evaporator 40 becomes wet steam in an operating temperature range of the heating element 100. That is, a valve opening start temperature with respect to secondary pressure is set lower than a refrigerant saturation temperature (temperature on the refrigerant saturation line). Similarly, the "nominal capacity valve opening characteristic" line and a "fully opening characteristic" line are also set on the lower temperature side than the refrigerant saturation line.SELECTED DRAWING: Figure 1

Description

本発明は、冷却装置等の冷凍サイクルシステムにおいて蒸発器の冷却能力を制御する温度式膨張弁及び冷凍サイクルシステムに関する。 The present invention relates to a temperature expansion valve and a refrigeration cycle system that control the cooling capacity of an evaporator in a refrigeration cycle system such as a cooling device.

従来、例えば情報処理分野において、サーバ等の大量に発熱するシステムを冷却することが行われている。この際、発熱素子を許容温度内の一定温度に維持する必要があるため、冷却装置の蒸発器の冷却能力を制御する必要がある。このような冷却装置として、温度式膨張弁により冷却能力を制御するものが、例えば特許第３７５８０７４号公報（特許文献１）に開示されている。この特許文献１のものは、蒸発器（コールドプレート）の後段に加熱部を設け、加熱部の下流に感温筒を取り付けて過熱度を制御することにより、蒸発器出口における冷媒状態を湿り蒸気となるようにするものである。 Conventionally, for example, in the field of information processing, cooling a system that generates a large amount of heat such as a server has been performed. At this time, since it is necessary to maintain the heat generating element at a constant temperature within the allowable temperature, it is necessary to control the cooling capacity of the evaporator of the cooling device. As such a cooling device, a device that controls the cooling capacity by a temperature type expansion valve is disclosed, for example, in Japanese Patent No. 3758074 (Patent Document 1). In Patent Document 1, a heating unit is provided at the subsequent stage of the evaporator (cold plate), and a temperature sensitive cylinder is attached downstream of the heating unit to control the degree of superheat, thereby moistening the refrigerant state at the evaporator outlet and steam. It is intended to be.

特許第３７５８０７４号公報Japanese Patent No. 3758074

特許文献１の従来の技術では、冷却装置のシステムに加熱部と加熱制御部とを設ける必要があり、システム構成が煩雑になるという問題がある。 In the conventional technique of Patent Document 1, it is necessary to provide a heating unit and a heating control unit in the system of the cooling device, and there is a problem that the system configuration becomes complicated.

本発明は、簡単な構成で、蒸発器出口での冷媒状態を安定して湿り蒸気となるように制御できる感温式温度膨張弁及び冷凍サイクルシステムを提供することを課題とする。 An object of the present invention is to provide a temperature-sensitive temperature expansion valve and a refrigeration cycle system capable of stably controlling the state of the refrigerant at the outlet of the evaporator so as to become moist steam with a simple configuration.

本発明の温度式膨張弁は、感温部を備えた温度式膨張弁において、冷却対象である発熱体の使用温度範囲にて、蒸発器出口冷媒が湿り蒸気となるように、二次圧力に対する弁開き始め温度が冷媒飽和温度より低く設定されていることを特徴とする。 The temperature type expansion valve of the present invention is a temperature type expansion valve provided with a temperature sensitive portion, and is subject to secondary pressure so that the evaporator outlet refrigerant becomes moist steam in the operating temperature range of the heating element to be cooled. The valve opening start temperature is set lower than the refrigerant saturation temperature.

このような本発明の温度式膨張弁によれば、感温部で検知される温度が高いほど冷媒流量が増加するように設定されており、冷却対象である発熱体の使用温度範囲にて、蒸発器出口冷媒が湿り蒸気となるように、二次圧力に対する弁開き始め温度が冷媒飽和温度より低く（すなわち冷媒の液相の範囲に）設定されている。したがって、この温度式膨張弁を用いた冷凍サイクルシステムにより冷凍装置を構成すると、蒸発器出口の冷媒状態が安定して湿り蒸気となり、発熱体を均一に冷却できて発熱体の温度分布を均一に保つことができる。 According to such a temperature type expansion valve of the present invention, the refrigerant flow rate is set to increase as the temperature detected by the temperature sensitive portion increases, and the refrigerant flow rate is set to increase within the operating temperature range of the heating element to be cooled. The valve opening temperature with respect to the secondary pressure is set lower than the refrigerant saturation temperature (that is, within the liquid phase range of the refrigerant) so that the evaporator outlet refrigerant becomes moist steam. Therefore, if the refrigeration system is configured with a refrigeration cycle system using this temperature type expansion valve, the refrigerant state at the evaporator outlet becomes stable and becomes moist steam, the heating element can be cooled uniformly, and the temperature distribution of the heating element becomes uniform. Can be kept.

この際、前記発熱体の熱負荷変動時に弁が公称能力時の開度となった場合でも、前記蒸発器出口における冷媒が常に湿り蒸気となるように、弁が公称能力時の開度となる温度を、冷媒飽和温度よりも低く設定されていることを特徴とする温度式膨張弁が好ましい。 At this time, even if the valve has an opening at the nominal capacity when the heat load of the heating element fluctuates, the valve has an opening at the nominal capacity so that the refrigerant at the evaporator outlet always becomes moist steam. A temperature type expansion valve characterized in that the temperature is set lower than the refrigerant saturation temperature is preferable.

また、前記発熱体の熱負荷変動時に弁が全開になった場合でも、前記蒸発器出口における冷媒が常に湿り蒸気となるように、弁全開となる温度が、冷媒飽和温度よりも低く設定されていることを特徴とする温度式膨張弁が好ましい。 Further, even when the valve is fully opened when the heat load of the heating element fluctuates, the temperature at which the valve is fully opened is set lower than the refrigerant saturation temperature so that the refrigerant at the evaporator outlet is always moist steam. A temperature type expansion valve characterized by the above is preferable.

また、この際、内部均圧式であることを特徴とする温度式膨張弁が好ましい。 Further, at this time, a temperature type expansion valve characterized by an internal pressure equalization type is preferable.

また、前記蒸発器出口における冷媒が常に湿り蒸気となるように、二次圧力に対する弁開き始め温度が、冷媒飽和温度よりも前記蒸発器の圧力損失分の冷媒飽和相当温度だけ低く設定されていることを特徴とする温度式膨張弁が好ましい。 Further, the valve opening start temperature with respect to the secondary pressure is set lower than the refrigerant saturation temperature by the temperature corresponding to the refrigerant saturation corresponding to the pressure loss of the evaporator so that the refrigerant at the evaporator outlet is always moist steam. A temperature type expansion valve characterized by this is preferable.

また、前記感温部のチャージ方式が吸着チャージ方式であることを特徴とする温度式膨張弁が好ましい。 Further, a temperature type expansion valve characterized in that the charge method of the temperature sensitive portion is an adsorption charge method is preferable.

また、本発明の冷凍サイクルシステムは、圧縮機と、凝縮器と、蒸発器と、前記凝縮器と前記蒸発器との間に設けられた絞り装置とを含む冷凍サイクルシステムであって、前記いずれかの温度式膨張弁が、前記絞り装置として用いられていることを特徴とする。 Further, the refrigeration cycle system of the present invention is a refrigeration cycle system including a compressor, a condenser, an evaporator, and a drawing device provided between the condenser and the evaporator. The temperature type expansion valve is characterized in that it is used as the throttle device.

本発明の温度式膨張弁及び冷凍サイクルシステムによれば、簡単な構成で、蒸発器出口での冷媒状態を安定して湿り蒸気となるように制御でき、冷却装置において発熱体を均一に冷却できて発熱体の温度分布を均一に保つことができる。 According to the temperature type expansion valve and the refrigeration cycle system of the present invention, the refrigerant state at the evaporator outlet can be controlled to be stable and moist steam with a simple configuration, and the heating element can be uniformly cooled in the cooling device. Therefore, the temperature distribution of the heating element can be kept uniform.

本発明の実施形態の温度式膨張弁を用いた冷却装置の冷凍サイクルシステムの要部を示す図である。It is a figure which shows the main part of the refrigeration cycle system of the cooling apparatus using the temperature type expansion valve of the embodiment of this invention. 実施形態の温度式膨張弁における空気特性を示す図である。It is a figure which shows the air characteristic in the temperature type expansion valve of an embodiment. 従来の温度式膨張弁における空気特性を示す図である。It is a figure which shows the air characteristic in the conventional temperature type expansion valve.

次に、本発明の温度式膨張弁及び冷凍サイクルシステムの実施形態について図面を参照して説明する。図１は実施形態の温度式膨張弁を用いた冷却装置の冷凍サイクルシステムの要部を示す図である。図１において、１０は温度式膨張弁、２０は圧縮機、３０は凝縮器、４０は蒸発器、５０はアキュムレータであり、これらは配管で環状に接続することにより冷凍サイクルシステムを構成している。温度式膨張弁１０は、弁本体部１、ダイヤフラム装置２、例えば従来の感温筒と同様な感温部３、及びキャピラリチューブ４を有している。弁本体部１の一次側継手管１ａは凝縮器３０の出口側配管３０ａに接続され、二次側継手管１ｂは蒸発器４０の入口側配管４０ａに接続されている。そして、蒸発器４０は冷却対象である発熱体１００に接触して併設され、この蒸発器４０の出口側配管４０ｂに感温部３（感温筒）が取り付けられている。なお、発熱体１００は、例えばメモリやＣＰＵ等の発熱素子などであり、この発熱体１００の発熱体熱負荷の挙動は既知である。なお、以下の説明で、「温度式膨張弁」を適宜「膨張弁」とも表現する。 Next, an embodiment of the temperature expansion valve and the refrigeration cycle system of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a main part of a refrigeration cycle system of a cooling device using the temperature type expansion valve of the embodiment. In FIG. 1, 10 is a temperature expansion valve, 20 is a compressor, 30 is a condenser, 40 is an evaporator, and 50 is an accumulator, which are connected in a ring shape by piping to form a refrigeration cycle system. .. The temperature expansion valve 10 has a valve body 1, a diaphragm device 2, for example, a temperature sensing portion 3 similar to a conventional temperature sensing cylinder, and a capillary tube 4. The primary side joint pipe 1a of the valve body 1 is connected to the outlet side pipe 30a of the condenser 30, and the secondary side joint pipe 1b is connected to the inlet side pipe 40a of the evaporator 40. The evaporator 40 is placed in contact with the heating element 100 to be cooled, and the temperature sensitive portion 3 (temperature sensitive cylinder) is attached to the outlet side pipe 40b of the evaporator 40. The heating element 100 is, for example, a heating element such as a memory or a CPU, and the behavior of the heating element heat load of the heating element 100 is known. In the following description, the "temperature type expansion valve" is also appropriately referred to as an "expansion valve".

圧縮機２０は冷凍サイクルシステムを流れる冷媒を圧縮し、圧縮された冷媒は凝縮器３０で凝縮液化され、一次側継手管１ａを通して弁本体部１に流入される。弁本体部１は流入される冷媒を減圧（膨張）して二次側継手管１ｂから蒸発器４０に流入させる。蒸発器４０は冷媒の一部を蒸発気化し、気液混合状態の冷媒がアキュムレータ５０に流入し、このアキュムレータ５０から気相冷媒が圧縮機２０に循環される。そして、蒸発器４０は、冷媒の一部を蒸発気化することで、発熱体１００から熱を吸収する。これにより発熱体１００が冷却される。また、感温部３には、吸着チャージによりガスが封入されており、この感温部３はキャピラリチューブ４によりダイヤフラム装置２に連結されている。 The compressor 20 compresses the refrigerant flowing through the refrigeration cycle system, and the compressed refrigerant is condensed and liquefied by the condenser 30 and flows into the valve body 1 through the primary side joint pipe 1a. The valve body 1 decompresses (expands) the inflowing refrigerant and causes it to flow into the evaporator 40 from the secondary side joint pipe 1b. The evaporator 40 evaporates and vaporizes a part of the refrigerant, the refrigerant in the gas-liquid mixed state flows into the accumulator 50, and the vapor phase refrigerant is circulated from the accumulator 50 to the compressor 20. Then, the evaporator 40 absorbs heat from the heating element 100 by evaporating and vaporizing a part of the refrigerant. This cools the heating element 100. Further, a gas is sealed in the temperature sensitive portion 3 by an adsorption charge, and the temperature sensitive portion 3 is connected to the diaphragm device 2 by a capillary tube 4.

温度式膨張弁１０の機械的な構成としては、広く知られている一般的なものを採用することができる。例えば、ダイヤフラム装置２は、キャピラリチューブ４によって感温部３に接続された受圧室と均圧室とを、ダイヤフラムにより区画するよう構成されている。なお、この実施形態の温度式膨張弁１０は内部均圧式であるが、外部均圧式の場合は均圧室は蒸発器４０の出口側配管４０ｂに導通される。弁本体部１は、ダイヤフラムに連結された弁体により、一次側継手管１ａと二次側継手管１ｂとの間に形成された弁ポートの弁開度を調整するよう構成されている。そして、感温部３による感知温度に応じて変化する受圧室の内圧に応じて冷媒を流す弁ポートの弁開度を変化させ、蒸発器４０へ供給する冷媒の流量制御を行う。 As the mechanical configuration of the temperature type expansion valve 10, a widely known general one can be adopted. For example, the diaphragm device 2 is configured to partition the pressure receiving chamber and the pressure equalizing chamber connected to the temperature sensing portion 3 by the capillary tube 4 by a diaphragm. The temperature type expansion valve 10 of this embodiment is an internal pressure equalizing type, but in the case of the external pressure equalizing type, the pressure equalizing chamber is conducted to the outlet side pipe 40b of the evaporator 40. The valve body 1 is configured to adjust the valve opening degree of the valve port formed between the primary side joint pipe 1a and the secondary side joint pipe 1b by the valve body connected to the diaphragm. Then, the valve opening degree of the valve port through which the refrigerant flows is changed according to the internal pressure of the pressure receiving chamber that changes according to the temperature sensed by the temperature sensing unit 3, and the flow rate of the refrigerant supplied to the evaporator 40 is controlled.

また、実施形態の温度式膨張弁１０は以下のように設定されている。図２は実施形態の温度式膨張弁１０における空気特性の概略図、図３は従来の温度式膨張弁における空気特性の概略図の一例であり、これらの空気特性は、感温部３で検知される感温部温度「Ｔ」と二次側継手管１ｂの圧力である二次圧力「Ｐ」に対して、弁が全開となる「全開特性」のライン、「公称能力弁開特性」のライン、弁の開き始めを示す「静止過熱度（ＳＳＨ）」のラインを図示したものである。 Further, the temperature type expansion valve 10 of the embodiment is set as follows. FIG. 2 is a schematic diagram of the air characteristics of the temperature type expansion valve 10 of the embodiment, and FIG. 3 is an example of a schematic diagram of the air characteristics of the conventional temperature type expansion valve, and these air characteristics are detected by the temperature sensing unit 3. With respect to the temperature sensitive part temperature "T" and the secondary pressure "P" which is the pressure of the secondary side joint pipe 1b, the line of "fully open characteristic" where the valve is fully opened, "nominal capacity valve opening characteristic" The line and the line of "static superheat degree (SSH)" indicating the start of opening of the valve are illustrated.

図２に示すように、実施形態の温度式膨張弁１０においては、発熱体１００における使用温度範囲は予め決められている。そして、この使用温度範囲において、「静止過熱度」（ＳＳＨ）が、冷媒飽和線よりも左側（液相側）に設定されている。すなわち、この使用温度範囲において、二次圧力に対する弁開き始め温度が冷媒飽和温度（冷媒飽和線上の温度）より低く設定されている。また、「公称能力弁開特性」のラインと「全開特性」のラインも、同様に、使用温度範囲において冷媒飽和線よりも左側（液相側）に設定されている。したがって、蒸発器４０の出口の冷媒状態が安定して湿り蒸気となるため、発熱体１００の温度分布を均一に保つことができ、発熱体１００の部分劣化が回避できる。 As shown in FIG. 2, in the temperature type expansion valve 10 of the embodiment, the operating temperature range of the heating element 100 is predetermined. Then, in this operating temperature range, the "static superheat degree" (SSH) is set to the left side (liquid phase side) of the refrigerant saturation line. That is, in this operating temperature range, the valve opening start temperature with respect to the secondary pressure is set lower than the refrigerant saturation temperature (temperature on the refrigerant saturation line). Similarly, the "nominal capacity valve opening characteristic" line and the "fully opening characteristic" line are also set to the left side (liquid phase side) of the refrigerant saturation line in the operating temperature range. Therefore, since the refrigerant state at the outlet of the evaporator 40 is stable and becomes moist steam, the temperature distribution of the heating element 100 can be kept uniform, and partial deterioration of the heating element 100 can be avoided.

実施形態の温度式膨張弁１０は内部均圧式であるが、外部均圧式の温度式膨張弁や、蒸発器の圧力損失が殆どない場合の内部均圧式の温度式膨張弁では、上記のように、二次圧力に対する弁開き始め温度を冷媒飽和温度より低く設定する、という構成でよい。なお、蒸発器（膨張弁から蒸発器出口までの間）の圧力損失が大きい場合の内部均圧式の温度式膨張弁では、二次圧力に対する弁開き始め温度を冷媒飽和温度よりも圧力損失分の冷媒飽和相当温度だけ低く設定する、という構成をさらに備えていればよい。これは、蒸発器の圧力損失が大きい場合、圧力損失分だけ、蒸発器４０の出口配管の内圧が二次圧力（膨張弁出口圧力）より下がるため、蒸発器４０の出口配管内の冷媒状態が、過熱蒸気となる可能性があるため、これを回避するためである。 The temperature type expansion valve 10 of the embodiment is an internal pressure equalizing type, but the external pressure equalizing type temperature type expansion valve and the internal pressure equalizing type temperature type expansion valve when there is almost no pressure loss of the evaporator are as described above. , The valve opening start temperature with respect to the secondary pressure may be set lower than the refrigerant saturation temperature. In the case of an internal pressure equalizing type thermal expansion valve when the pressure loss of the evaporator (between the expansion valve and the evaporator outlet) is large, the valve opening start temperature with respect to the secondary pressure is set to the pressure loss amount rather than the refrigerant saturation temperature. It suffices to further provide a configuration in which the temperature corresponding to the saturation of the refrigerant is set lower. This is because when the pressure loss of the evaporator is large, the internal pressure of the outlet pipe of the evaporator 40 is lower than the secondary pressure (expansion valve outlet pressure) by the amount of the pressure loss, so that the state of the refrigerant in the outlet pipe of the evaporator 40 is changed. This is to avoid this because it may become overheated steam.

したがって、このように弁開き始め温度を設定することで、圧力損失の大きい蒸発器４０で内部均圧式の温度式膨張弁であっても、蒸発器４０の出口の冷媒状態が安定して湿り蒸気となるため、発熱体１００の温度分布を均一に保つことができ、発熱体１００の部分劣化が回避できる。圧力損失の大きい蒸発器４０であっても、上述の様に、外部均圧方式の温度式膨張弁では圧力損失の影響を受けない為、内部均圧式の温度式膨張弁のように圧力損失分の冷媒飽和相当温度分だけ弁開き始め温度をさらに低く設定すること（ＳＳＨラインの左側へのシフト）は不要である。 Therefore, by setting the valve opening start temperature in this way, even if the evaporator 40 has a large pressure loss and is an internal pressure equalizing type temperature expansion valve, the refrigerant state at the outlet of the evaporator 40 is stable and wet steam. Therefore, the temperature distribution of the heating element 100 can be kept uniform, and partial deterioration of the heating element 100 can be avoided. Even if the evaporator 40 has a large pressure loss, as described above, the external pressure equalizing type temperature expansion valve is not affected by the pressure loss, so the pressure loss amount is the same as the internal pressure equalizing type temperature expansion valve. It is not necessary to set the valve opening start temperature further lower (shift to the left side of the SSH line) by the temperature equivalent to the saturation of the refrigerant.

なお、従来の温度式膨張弁では過熱度制御を行うため、図３に示すように、「静止過熱度（ＳＳＨ）」のラインを冷媒飽和線より右側（気相側）に設定している。「公称能力弁開特性」のラインと「全開特性」のラインも、同様に冷媒飽和線より右側（気相側）に設定している。このため、蒸発器の出口の冷媒状態を湿り蒸気とすることができず、発熱体の温度分布を均一に保つことができない。これに対して、本発明では、温度式膨張弁が前記のように設定されているので、発熱体の温度分布を均一に保つことができる。 In addition, in order to control the degree of superheat in the conventional temperature type expansion valve, as shown in FIG. 3, the line of "static superheat (SSH)" is set on the right side (gas phase side) of the refrigerant saturation line. The "nominal capacity valve open characteristic" line and the "fully open characteristic" line are also set to the right side (gas phase side) of the refrigerant saturation line. Therefore, the refrigerant state at the outlet of the evaporator cannot be changed to wet steam, and the temperature distribution of the heating element cannot be kept uniform. On the other hand, in the present invention, since the temperature type expansion valve is set as described above, the temperature distribution of the heating element can be kept uniform.

また、感温部３は吸着チャージにより構成されているので、前記のようなＳＳＨライン等を冷媒飽和線よりも左側(液相側)にする設定が容易にできる。 Further, since the temperature sensitive portion 3 is composed of an adsorption charge, it is possible to easily set the SSH line or the like as described above to the left side (liquid phase side) of the refrigerant saturation line.

以上、本発明の実施の形態について図面を参照して詳述し、その他の実施形態についても詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。 Although the embodiments of the present invention have been described in detail with reference to the drawings and other embodiments have also been described in detail, the specific configuration is not limited to these embodiments, and the present invention is not limited to these embodiments. It is included in the present invention even if there is a design change or the like within a range that does not deviate from the gist.

１ 弁本体部
２ ダイヤフラム装置
３ 感温部
４ キャピラリチューブ
１０ 温度式膨張弁
２０ 圧縮機
３０ 凝縮器
４０ 蒸発器
４０ａ 入口側配管
４０ｂ 出口側配管
５０ アキュムレータ
１００ 発熱体 1 Valve body 2 Diaphragm device 3 Temperature sensitive part 4 Capillary tube 10 Temperature type expansion valve 20 Compressor 30 Condenser 40 Evaporator 40a Inlet side piping 40b Outlet side piping 50 Accumulator 100 Heating element

Claims (7)

感温部を備えた温度式膨張弁において、冷却対象である発熱体の使用温度範囲にて、蒸発器出口冷媒が湿り蒸気となるように、二次圧力に対する弁開き始め温度が冷媒飽和温度より低く設定されていることを特徴とする温度式膨張弁。 In a temperature-type expansion valve equipped with a temperature-sensitive part, the valve opening temperature with respect to the secondary pressure is higher than the refrigerant saturation temperature so that the evaporator outlet refrigerant becomes moist steam within the operating temperature range of the heating element to be cooled. A temperature expansion valve characterized by being set low. 前記発熱体の熱負荷変動時に弁が公称能力時の開度となった場合でも、前記蒸発器出口における冷媒が常に湿り蒸気となるように、弁が公称能力時の開度となる温度を、冷媒飽和温度よりも低く設定されていることを特徴とする請求項１に記載の温度式膨張弁。 Even if the valve opens at the nominal capacity when the heat load of the heating element fluctuates, the temperature at which the valve opens at the nominal capacity is set so that the refrigerant at the evaporator outlet always becomes moist steam. The temperature type expansion valve according to claim 1, wherein the temperature is set lower than the refrigerant saturation temperature. 前記発熱体の熱負荷変動時に弁が全開になった場合でも、前記蒸発器出口における冷媒が常に湿り蒸気となるように、弁全開となる温度が、冷媒飽和温度よりも低く設定されていることを特徴とする請求項１に記載の温度式膨張弁。 The temperature at which the valve is fully opened is set lower than the refrigerant saturation temperature so that the refrigerant at the evaporator outlet is always moist steam even when the valve is fully opened when the heat load of the heating element fluctuates. The temperature type expansion valve according to claim 1. 内部均圧式であることを特徴とする請求項１乃至３のいずれか一項に記載の温度式膨張弁。 The temperature type expansion valve according to any one of claims 1 to 3, wherein the temperature type expansion valve is of an internal pressure equalizing type. 前記蒸発器出口における冷媒が常に湿り蒸気となるように、二次圧力に対する弁開き始め温度が、冷媒飽和温度よりも前記蒸発器の圧力損失分の冷媒飽和相当温度だけ低く設定されていることを特徴とする請求項４に記載の温度式膨張弁。 The valve opening start temperature with respect to the secondary pressure is set lower than the refrigerant saturation temperature by the temperature corresponding to the refrigerant saturation corresponding to the pressure loss of the evaporator so that the refrigerant at the evaporator outlet is always moist steam. The temperature type expansion valve according to claim 4, which is characterized. 前記感温部のチャージ方式が吸着チャージ方式であることを特徴とする請求項１乃至５のいずれか一項に記載の温度式膨張弁。 The temperature-type expansion valve according to any one of claims 1 to 5, wherein the charge method of the temperature-sensitive portion is an adsorption charge method. 圧縮機と、凝縮器と、蒸発器と、前記凝縮器と前記蒸発器との間に設けられた絞り装置とを含む冷凍サイクルシステムであって、請求項１乃至６のいずれか一項に記載の温度式膨張弁が、前記絞り装置として用いられていることを特徴とする冷凍サイクルシステム。 The refrigerating cycle system including a compressor, a condenser, an evaporator, and a drawing device provided between the condenser and the evaporator, wherein the refrigerating cycle system includes any one of claims 1 to 6. A refrigeration cycle system characterized in that the temperature type expansion valve of the above is used as the throttle device.
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