JPH0120691B2 - - Google Patents
Info
- Publication number
- JPH0120691B2 JPH0120691B2 JP56184584A JP18458481A JPH0120691B2 JP H0120691 B2 JPH0120691 B2 JP H0120691B2 JP 56184584 A JP56184584 A JP 56184584A JP 18458481 A JP18458481 A JP 18458481A JP H0120691 B2 JPH0120691 B2 JP H0120691B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- refrigerant
- expansion valve
- evaporator
- detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003507 refrigerant Substances 0.000 claims description 36
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、自動車用空気調和装置の冷媒流量制
御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerant flow rate control device for an air conditioner for an automobile.
従来この種の冷媒回路は、第１図に示す如く、
蒸発器ａの近辺が蒸発器ａへの冷媒入口管ｂおよ
び冷媒出口管ｃを設けた構造であり、冷媒入口管
ｂと蒸発器ａとの間に膨張弁ｄが具備されてい
る。ｅは膨張弁の感温部で冷媒出口管ｃと接触し
て設けられ、蒸発器ａ内の冷媒過熱度検知し、冷
媒流量を制御している。また冷媒出口管ｃは、自
動車の原動機により駆動される圧縮機（図示せ
ず）の吸入側に接続され、冷媒入口管ｂは、凝縮
器（図示せず）を介し、圧縮機の吐出側と接続さ
れている。 Conventionally, this type of refrigerant circuit, as shown in Figure 1,
The structure is such that a refrigerant inlet pipe b and a refrigerant outlet pipe c to the evaporator a are provided near the evaporator a, and an expansion valve d is provided between the refrigerant inlet pipe b and the evaporator a. Reference character e is a temperature sensing part of the expansion valve, which is provided in contact with the refrigerant outlet pipe c, and detects the degree of superheating of the refrigerant in the evaporator a, thereby controlling the refrigerant flow rate. Further, the refrigerant outlet pipe c is connected to the suction side of a compressor (not shown) driven by the prime mover of the automobile, and the refrigerant inlet pipe b is connected to the discharge side of the compressor via a condenser (not shown). It is connected.
上記構成によれば、冷媒流量は蒸発器ａの過熱
度により制御されるため、特に夏季におけるアイ
ドリング時、渋滞走行時など冷凍サイクルの高圧
が上昇する状態においては、圧縮機の吸入側圧力
が上昇するにともなつて蒸発器ａの冷媒圧力もＲ
１２の場合通常走行時２〜2.5Kg／cm2Ｇから3.5〜
４Kg／cm2Ｇへ上昇するため、冷房効果が低下する
という欠点を有していた。 According to the above configuration, since the refrigerant flow rate is controlled by the degree of superheating of the evaporator a, the pressure on the suction side of the compressor increases especially when the high pressure of the refrigeration cycle increases, such as when idling in summer or driving in traffic jams. As a result, the refrigerant pressure in evaporator a also increases
In case of 12, 2~2.5Kg/cm 2 G to 3.5~ during normal driving
Since the air temperature increases to 4Kg/cm 2 G, there is a drawback that the cooling effect decreases.
本発明は、上記欠点を補い、冷媒回路の高圧の
上昇する状況においても、充分な冷房効果が得ら
れるようにするものである。 The present invention compensates for the above-mentioned drawbacks and makes it possible to obtain a sufficient cooling effect even in situations where the high pressure of the refrigerant circuit increases.
以下、本発明をその一実施例を示す添付図面の
第２図、第３図を参考に説明する。 Hereinafter, the present invention will be described with reference to FIGS. 2 and 3 of the accompanying drawings showing one embodiment thereof.
第２図において、１は蒸発器、２は冷媒入口
管、３は冷媒出口管、４は自動温度式膨張弁で冷
媒出口管３に接触して設けられた感温部５により
冷媒流量を制御する。６は高圧圧力検知器で、圧
力が設定圧以上になると切換弁７に通電する。８
は蒸発器１内の圧力を一定に保つ定圧圧力膨張弁
で、蒸発器内圧力を２〜３Kg／cm2Ｇとなるよう圧
力が設定されており、切換弁７を介して自動温度
式膨張弁４と並列に冷媒回路が形成されている。
第２図は、高圧圧力検知器６によつて検知された
圧力が設定圧以下の場合を示しており、切換弁７
には通電されず、冷媒は図中に示した矢印の如
く、自動温度式膨張弁４を経て蒸発器１に入る。
また第３図は高圧圧力検知器６によつて検知され
た圧力が設定圧以上になつた場合を示し、切換弁
７が通電され冷媒は図中に示した矢印の如く定圧
圧力膨張弁８を経て蒸発器１に入る。 In Fig. 2, 1 is an evaporator, 2 is a refrigerant inlet pipe, 3 is a refrigerant outlet pipe, and 4 is an automatic thermostatic expansion valve, which controls the refrigerant flow rate by a temperature sensor 5 provided in contact with the refrigerant outlet pipe 3. do. Reference numeral 6 denotes a high-pressure pressure detector, which energizes the switching valve 7 when the pressure exceeds a set pressure. 8
is a constant pressure expansion valve that keeps the pressure inside the evaporator 1 constant, and the pressure is set so that the pressure inside the evaporator is 2 to 3 kg/cm 2 G. A refrigerant circuit is formed in parallel with 4.
FIG. 2 shows a case where the pressure detected by the high-pressure pressure detector 6 is below the set pressure, and the switching valve 7
is not energized, and the refrigerant enters the evaporator 1 through the automatic thermostatic expansion valve 4 as shown by the arrow in the figure.
Further, FIG. 3 shows a case where the pressure detected by the high pressure pressure detector 6 exceeds the set pressure, the switching valve 7 is energized, and the refrigerant flows through the constant pressure expansion valve 8 as shown by the arrow in the figure. After that, it enters evaporator 1.
上記構成において、高圧圧力検知器６が検知す
る圧力が設定より低い場合、すなわち、熱負荷が
小さい場合や通常走行時には、切換弁７には通電
されず自動温度膨張弁４を経て蒸発器１に入り、
過熱度による冷媒流量制御を行なう。しかし、高
圧圧力検知器６が検知する圧力が設定より高い場
合、すなわち、熱負荷が大きい場合や、渋滞走
行、アイドリング時の場合は、切換弁７が通電さ
れ、冷媒は定圧圧力膨張弁８を経て蒸発器１に入
り、この定圧圧力膨張弁８によつて蒸発器１の圧
力を一定となるように冷媒流量制御を行なう。 In the above configuration, when the pressure detected by the high-pressure pressure detector 6 is lower than the setting, that is, when the heat load is small or during normal driving, the switching valve 7 is not energized and the voltage is passed through the automatic temperature expansion valve 4 to the evaporator 1. enter,
Controls the refrigerant flow rate based on the degree of superheating. However, when the pressure detected by the high-pressure pressure detector 6 is higher than the setting, that is, when the heat load is large, when driving in traffic jams, or when idling, the switching valve 7 is energized and the refrigerant flows through the constant pressure expansion valve 8. The refrigerant then enters the evaporator 1, and the constant pressure expansion valve 8 controls the flow rate of the refrigerant to keep the pressure in the evaporator 1 constant.
したがつて、高圧圧力検知器６の設定圧力およ
び定圧圧力膨張弁８の設定圧力を適切に設定する
ことにより、高圧が設定圧力より低い場合には従
来の自動温度膨張弁ｄによる冷媒制御を行なうと
ともに、高圧が設定圧力より高い場合には、蒸発
器１内の圧力が一定となる冷媒制御を行ない、常
に快適な冷房効果を得るとともに渋滞走行、アイ
ドリング時の高圧の上昇をも防ぎ、原動機に与え
る熱的影響、燃料消費量の低減に寄与するもので
ある。 Therefore, by appropriately setting the set pressure of the high pressure pressure detector 6 and the set pressure of the constant pressure expansion valve 8, when the high pressure is lower than the set pressure, refrigerant control using the conventional automatic temperature expansion valve d is performed. At the same time, when the high pressure is higher than the set pressure, the refrigerant is controlled so that the pressure inside the evaporator 1 remains constant, providing a comfortable cooling effect at all times and preventing the high pressure from rising when driving in traffic jams or idling. This contributes to reducing thermal effects and fuel consumption.
また本実施例において高圧圧力検知器６の設置
位置を冷媒入口管としたが、圧縮機吐出口、凝縮
器、レシーバなどの高圧部のどの位置に設置して
も上記の効果が得られるのは明白である。 Furthermore, in this embodiment, the high-pressure pressure detector 6 is installed at the refrigerant inlet pipe, but the above effect can be obtained no matter where it is installed in the high-pressure part such as the compressor discharge port, condenser, or receiver. It's obvious.
上記実施例より明らかなように、本発明におけ
る自動車用空気調和装置の冷媒流量制御装置は、
高圧を検知する高圧圧力検知器と前記検知器が設
定圧以上で出力する信号により２方向に冷媒回路
を切換る切換弁とを具備し、さらに蒸発器入口と
前記切換弁との間に、自動温度式膨張弁と、定圧
圧力膨張弁とを並列に設置したもので、高圧が設
定値以上になると定圧圧力膨張弁による冷媒制御
が行なわれ、高圧の上昇を防ぐとともに、冷房効
果もそこなわれず、原動機のオーバーヒートをも
防ぎ、しいては省資源にも寄与するものである。 As is clear from the above embodiments, the refrigerant flow rate control device for an automotive air conditioner according to the present invention is as follows:
The system is equipped with a high-pressure pressure detector that detects high pressure and a switching valve that switches the refrigerant circuit in two directions based on a signal output by the detector when the pressure is higher than a set pressure. A thermostatic expansion valve and a constant pressure expansion valve are installed in parallel.When the high pressure exceeds a set value, the constant pressure expansion valve controls the refrigerant, preventing the high pressure from rising and also preventing the cooling effect from being impaired. First, it also prevents the prime mover from overheating, which in turn contributes to resource conservation.
第１図は従来の自動車用空気調和装置の要部構
成図、第２図は本発面の一実施例における冷媒流
量制御装置を具備した自動車用空気調和装置の定
常時の冷媒の流れを示す要部構成図、第３図は同
自動車用空気調和装置の過負荷時の冷媒の流れを
示す要部構成図である。
１……蒸発器、４……自動温度式膨張弁、６…
…高圧圧力検知器、７……切換弁、８……定圧圧
力膨張弁。
Fig. 1 is a diagram showing the main parts of a conventional air conditioner for an automobile, and Fig. 2 shows a steady state flow of refrigerant in an air conditioner for an automobile equipped with a refrigerant flow rate control device according to an embodiment of the present invention. FIG. 3 is a diagram showing the flow of refrigerant in the automobile air conditioner during overload. 1...Evaporator, 4...Automatic temperature expansion valve, 6...
...High pressure pressure detector, 7...Switching valve, 8...Constant pressure pressure expansion valve.
Claims (1)
器が、設定圧力以上で出力する信号により、２方
向に冷媒回路を切換える切換弁とを具備し、さら
に蒸発器入口と、前記切換弁との間に、自動温度
式膨張弁と、定圧圧力膨張弁とを並列に設置する
とともに、前記高圧圧力検知器が設定圧力以上の
値を検知した時、前記切換弁により冷媒回路を定
圧圧力膨張弁側に切換えることを特徴とした自動
車用空気調和装置の冷媒流量制御装置。1 A high-pressure pressure detector that detects high pressure, a switching valve that switches the refrigerant circuit in two directions according to a signal output by the detector at a pressure equal to or higher than a set pressure, and a switch between the evaporator inlet and the switching valve. In between, an automatic temperature expansion valve and a constant pressure expansion valve are installed in parallel, and when the high pressure detector detects a value higher than the set pressure, the switching valve switches the refrigerant circuit to the constant pressure expansion valve side. A refrigerant flow control device for an automotive air conditioner characterized by switching to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56184584A JPS5885079A (en) | 1981-11-17 | 1981-11-17 | Controller for flow rate of refrigerant of air conditioner for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56184584A JPS5885079A (en) | 1981-11-17 | 1981-11-17 | Controller for flow rate of refrigerant of air conditioner for automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5885079A JPS5885079A (en) | 1983-05-21 |
| JPH0120691B2 true JPH0120691B2 (en) | 1989-04-18 |
Family
ID=16155761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56184584A Granted JPS5885079A (en) | 1981-11-17 | 1981-11-17 | Controller for flow rate of refrigerant of air conditioner for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885079A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4666956B2 (en) * | 2004-06-14 | 2011-04-06 | 三洋電機株式会社 | Cooling storage |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5299458A (en) * | 1976-02-16 | 1977-08-20 | Mitsubishi Electric Corp | Refrigerating plant |
-
1981
- 1981-11-17 JP JP56184584A patent/JPS5885079A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5299458A (en) * | 1976-02-16 | 1977-08-20 | Mitsubishi Electric Corp | Refrigerating plant |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5885079A (en) | 1983-05-21 |
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