JPH0648276Y2 - Vehicle refrigeration equipment - Google Patents
Vehicle refrigeration equipmentInfo
- Publication number
- JPH0648276Y2 JPH0648276Y2 JP1988037187U JP3718788U JPH0648276Y2 JP H0648276 Y2 JPH0648276 Y2 JP H0648276Y2 JP 1988037187 U JP1988037187 U JP 1988037187U JP 3718788 U JP3718788 U JP 3718788U JP H0648276 Y2 JPH0648276 Y2 JP H0648276Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- closing
- door
- detecting means
- refrigerant
- 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 - Lifetime
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は車両用冷凍装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a refrigeration system for a vehicle.
（従来の技術） 従来の車両用冷凍装置の１例が第５図ないし第７図に示
されている。(Prior Art) An example of a conventional vehicle refrigeration system is shown in FIGS. 5 to 7.
第５図には系統図が示され、コンプレッサ１が自動車用
エンジンによって電磁クラッチを介して駆動されると、
このコンプレッサ１から吐出された高温・高圧の冷媒ガ
スはコンデンサ２に入り、ここでフアン12によって送風
される外気により冷却されて凝縮液化する。A system diagram is shown in FIG. 5. When the compressor 1 is driven by an automobile engine through an electromagnetic clutch,
The high-temperature and high-pressure refrigerant gas discharged from the compressor 1 enters the condenser 2, where it is cooled by the outside air blown by the fan 12 and condensed and liquefied.
次いで、この液冷媒はレシーバ３、電磁弁４を経て冷房
用膨張弁５に入り、ここで絞られることにより断熱膨張
する。Next, this liquid refrigerant enters the cooling expansion valve 5 via the receiver 3 and the electromagnetic valve 4, and is adiabatically expanded by being throttled here.
次いで、この冷媒は車室内インストルメントパネルの下
部に設置されている冷房用熱交換器６に入り、ここでフ
アン８によって送風される車室内空気を冷却することに
より蒸発気化した後、再びコンプレッサ１に吸入され
る。Next, this refrigerant enters the cooling heat exchanger 6 installed in the lower portion of the vehicle interior instrument panel, where the vehicle interior air blown by the fan 8 is cooled to evaporate and vaporize again, and then the compressor 1 Inhaled into.
電磁弁４が閉とされた場合には、レシーバ３から流出し
た冷媒液は冷凍用定圧膨張弁７に入り、ここで絞られる
ことにより断熱膨張した後、冷蔵庫11内に配設されてい
る冷凍用熱交換器９に入り、ここでフアン13によって送
風される庫内空気を冷却することにより蒸発気化する。When the solenoid valve 4 is closed, the refrigerant liquid flowing out from the receiver 3 enters the constant pressure expansion valve 7 for freezing, where it is throttled to be adiabatically expanded, and then frozen in the refrigerator 11. The heat enters the heat exchanger 9 for use, and here, the air in the refrigerator blown by the fan 13 is cooled to be evaporated and vaporized.
次いで、この冷媒ガスは逆止弁10を経て再びコンプレッ
サ１に吸入される。Next, this refrigerant gas is sucked into the compressor 1 again via the check valve 10.
電磁弁４はコントローラ14からの指令によって制御さ
れ、第６図に示すように、予め定められた時間比率（例
えば60秒間は開、10秒間は閉）に従って交互に開閉され
る。The solenoid valve 4 is controlled by a command from the controller 14, and as shown in FIG. 6, is alternately opened and closed according to a predetermined time ratio (for example, open for 60 seconds and close for 10 seconds).
電磁弁４が開とされると、冷房用熱交換器６に冷媒が流
れると同時に冷凍用熱交換器９内の冷媒圧力が上昇する
ので定圧膨張弁７が閉となり、冷房用熱交換器６の冷媒
蒸発圧力P1及び冷凍用熱交換器９の冷媒蒸発圧力P2は図
示のように変化する。When the solenoid valve 4 is opened, the refrigerant flows into the cooling heat exchanger 6 and at the same time the refrigerant pressure in the freezing heat exchanger 9 rises, so that the constant pressure expansion valve 7 closes and the cooling heat exchanger 6 The refrigerant evaporation pressure P 1 and the refrigerant evaporation pressure P 2 of the refrigerating heat exchanger 9 change as shown in the figure.
電磁弁４が閉とされると、冷凍用熱交換器９内の冷媒圧
力が急速に低下し、これに伴って定圧膨張弁７が開とな
って冷凍用熱交換器９に冷媒が流れ、その冷媒蒸発圧力
を設定圧力を例えば0.5K/cm2に維持する。When the solenoid valve 4 is closed, the pressure of the refrigerant in the refrigeration heat exchanger 9 rapidly decreases, and along with this, the constant pressure expansion valve 7 opens and the refrigerant flows into the refrigeration heat exchanger 9, The refrigerant evaporation pressure is maintained at a set pressure of, for example, 0.5 K / cm 2 .
なお、15はこの冷凍装置の運転・停止を司掌するA/Cス
イッチ、16は冷蔵スイッチで、これをOFFとすると冷房
用熱交換器６のみに冷媒が流れる。Reference numeral 15 is an A / C switch that controls the operation / stop of the refrigerating apparatus, and 16 is a refrigeration switch. When this switch is turned off, the refrigerant flows only in the cooling heat exchanger 6.
冷蔵庫11の詳細が第７図に示され、被冷蔵物は冷蔵室17
内の荷台18上に載置され、被冷凍物は冷凍庫19内に格納
される。The details of the refrigerator 11 are shown in FIG.
The object to be frozen is placed on the cargo bed 18 inside and is stored in the freezer 19.
庫内空気は白抜矢印で示すように、荷台18に設けられた
多数のスリットを通りその下方に形成された戻り通路20
を経てファン室21内に入り、ファン13に吸い込まれて付
勢され、冷凍用熱交換器９のコルゲートフィン9a間を流
過する過程で冷却され、多孔板22を経て再び冷蔵室17内
に循環する。23は冷蔵室17の開閉扉、24は冷凍室19の開
閉蓋である。The air inside the warehouse passes through a large number of slits provided in the cargo bed 18 as shown by the white arrows, and a return passage 20 formed therebelow.
After entering into the fan chamber 21, the fan 13 sucks and energizes, cools in the process of flowing between the corrugated fins 9a of the freezing heat exchanger 9, and again into the refrigerating chamber 17 through the perforated plate 22. Circulate. Reference numeral 23 is an opening / closing door of the refrigerator compartment 17, and 24 is an opening / closing lid of the freezer compartment 19.
（考案が解決しようとする課題） 上記従来の装置においては、電磁弁４を予め定められた
時間比率で交互に開閉することによって冷房用熱交換器
６及び冷凍用熱交換器９に交互に冷媒を流しているた
め、冷蔵庫11内に格納される被冷蔵物や被冷凍物が少な
く、従って、冷凍負荷が小さい場合でも冷凍用熱交換器
９には所定の時間割合だけ冷媒が流れるので、この冷凍
装置の冷却能力が無駄に消費される。(Problems to be Solved by the Invention) In the above conventional device, the refrigerant is alternately provided to the cooling heat exchanger 6 and the freezing heat exchanger 9 by alternately opening and closing the solenoid valve 4 at a predetermined time ratio. Since there is no refrigerant to be stored or frozen in the refrigerator 11, the refrigerant flows through the freezing heat exchanger 9 for a predetermined time even if the refrigerating load is small. The cooling capacity of the refrigeration system is wasted.
また、この間、冷房負荷が大きくても冷房能力を増大で
きないという不具合があった。Further, during this period, there is a problem that the cooling capacity cannot be increased even if the cooling load is large.
また、冷蔵庫11の扉23が開いている間でも冷凍用熱交換
器９に冷媒が予め定められた時間比率で供給されるの
で、冷凍装置の冷凍能力が無駄に消費される。Further, even while the door 23 of the refrigerator 11 is open, the refrigerant is supplied to the freezing heat exchanger 9 at a predetermined time ratio, so that the refrigerating capacity of the refrigerating device is wasted.
（課題を解決するための手段） 本考案は上記課題を解決するために提案されたものであ
って、その要旨とするところは、冷媒循環回路中に並列
に介装された車室内空気を冷却するための冷房用熱交換
器及び冷蔵庫内の空気を冷却するための冷凍用熱交換器
に予め設定された時間比率に基づいて交互に冷媒を流し
て蒸発させる車両用冷凍装置において、上記冷蔵庫内の
被冷蔵物の重量を検出する負荷検出手段と、上記冷蔵庫
の扉の開閉を検出する扉開閉検出手段と、上記負荷検出
手段からの指令を受けて上記冷房用熱交換器及び上記冷
凍用熱交換器に冷媒を流す時間比率を変更すると共に上
記扉開閉検出手段が扉閉を検出したとき上記負荷検出手
段からの入力による制御状態を継続し、上記扉開閉検出
手段が扉開を検出したときのみ上記負荷検出手段からの
入力をキャンセルする制御手段を設けたことを特徴とす
る車両用冷凍装置にある。(Means for Solving the Problems) The present invention has been proposed to solve the above problems, and its gist is to cool the vehicle interior air that is interposed in parallel in the refrigerant circulation circuit. In a refrigerating device for a vehicle, in which a refrigerant alternately flows based on a preset time ratio in a refrigerating heat exchanger for cooling air in a cooling heat exchanger and a refrigerator for Load detecting means for detecting the weight of the object to be refrigerated, door opening / closing detecting means for detecting opening / closing of the refrigerator door, and the cooling heat exchanger and the freezing heat in response to a command from the load detecting means. When the time ratio of flowing the refrigerant to the exchanger is changed and the door opening / closing detecting means detects the door closing, the control state by the input from the load detecting means is continued, and the door opening / closing detecting means detects the door opening. Only above load inspection A refrigerating apparatus for a vehicle is provided with a control means for canceling an input from the output means.
（作用） 本考案においては、上記構成を具えているため、冷蔵庫
内の被冷蔵物の重量を検出することによって冷凍用熱交
換器の冷凍負荷を検出し、この検出値に応じて制御手段
により冷凍用熱交換器及び冷房用熱交換器に冷媒を流す
時間比率を変更する。(Operation) Since the present invention has the above-mentioned configuration, the refrigerating load of the refrigerating heat exchanger is detected by detecting the weight of the object to be refrigerated in the refrigerator, and the control means is controlled according to the detected value. The time ratio of flowing the refrigerant to the heat exchanger for freezing and the heat exchanger for cooling is changed.
扉開閉検出手段が扉閉を検出したときは、負荷検出手段
からの入力による制御状態を継続し、扉開閉検出手段が
扉開を検出したときのみ負荷検出手段からの入力をキャ
ンセルする。When the door opening / closing detecting means detects the door closing, the control state by the input from the load detecting means is continued, and the input from the load detecting means is canceled only when the door opening / closing detecting means detects the door opening.
（実施例） 本考案の１実施例が第１図ないし第４図に示されてい
る。(Embodiment) One embodiment of the present invention is shown in FIGS.
第１図に示すように、冷蔵室17内には荷台30がスプリン
グ31を介して上下動自在に支持されている。荷台30上に
被冷蔵物が所定量以上載置されると、荷台30がスプリン
グ31を短縮させることによって降下して検出スイッチ32
に当接するようになっている。33は荷台30の下降を制限
するストッパである。As shown in FIG. 1, a cargo bed 30 is supported in the refrigerating compartment 17 via a spring 31 so as to be vertically movable. When the object to be refrigerated is placed on the loading platform 30 by a predetermined amount or more, the loading platform 30 shortens the spring 31 to lower the detection target 32.
It comes into contact with. 33 is a stopper that restricts the lowering of the loading platform 30.
荷台30が検出スイッチ32に当接すると、検出スイッチ32
からの信号がコントローラ14に入力される。そして、コ
ントローラ14は、第３図に示すように、電磁弁４の開弁
時間と閉弁時間との時間比率を変更し、冷凍用熱交換器
９に冷媒を流す時間を例えば15秒に延長し、冷房用熱交
換器６に冷媒を流す時間を55秒に短縮する。When the platform 30 contacts the detection switch 32, the detection switch 32
Is input to the controller 14. Then, as shown in FIG. 3, the controller 14 changes the time ratio between the valve opening time and the valve closing time of the solenoid valve 4 to extend the time for flowing the refrigerant to the refrigeration heat exchanger 9 to, for example, 15 seconds. Then, the time for flowing the refrigerant through the cooling heat exchanger 6 is shortened to 55 seconds.
冷蔵室17の開閉扉23の開閉を検出するドア開閉スイッチ
34が設けられ、このドア開閉スイッチ34はコントローラ
14に接続されている。Door open / close switch that detects opening / closing of the open / close door 23 of the refrigerator compartment 17
34 is provided, and this door opening / closing switch 34 is a controller
Connected to 14.
扉23が開くと、冷蔵庫11から庫内の冷気が車室内に逃げ
てしまい、冷凍能力が無駄に消費されるため、被冷蔵物
の温度が上昇しない程度に冷凍能力を抑えることが有効
である。When the door 23 is opened, the cold air in the refrigerator escapes from the refrigerator 11 into the passenger compartment, and the refrigerating capacity is wasted. Therefore, it is effective to suppress the refrigerating capacity to the extent that the temperature of the object to be refrigerated does not rise. .
そこで、扉23が開くと、ドア開閉スイッチ34がOFFとな
り、これからの信号がコントローラ14に入力される。す
ると、第３図に示すように、コントローラ14は検出スイ
ッチ32の入力をキャンセルして被冷蔵物の多少に拘らず
電磁弁４の閉弁時間を例えば５秒間に短縮する。Then, when the door 23 is opened, the door opening / closing switch 34 is turned off, and a signal from this is input to the controller 14. Then, as shown in FIG. 3, the controller 14 cancels the input of the detection switch 32 and shortens the closing time of the solenoid valve 4 to, for example, 5 seconds regardless of the amount of the object to be refrigerated.
他の構成は第５図ないし第７図に示す従来のものと同様
であり、対応する部材には同じ符号が付されている。Other configurations are similar to those of the conventional one shown in FIGS. 5 to 7, and corresponding members are designated by the same reference numerals.
しかして、第３図及び第４図に示すように、ドア開閉検
出ルーチンはA/Cスイッチ15及び冷蔵スイッチ16がONの
とき作動する。そして、この検出ルーチンがｎ≧２なら
ば、コントローラ14は前回の検出ルーチン、つまり、
（ｎ−１）の扉23の開閉状態を記憶している。Thus, as shown in FIGS. 3 and 4, the door open / close detection routine operates when the A / C switch 15 and the refrigeration switch 16 are ON. If this detection routine is n ≧ 2, the controller 14 determines that the previous detection routine, that is,
The opened / closed state of the door 23 of (n-1) is stored.
扉23が閉のとき前回の検出ルーチン（ｎ−１）において
扉23が開であったことをコントローラ14が記憶している
場合、又は、コントローラ14が記憶していない状態（ｎ
＝１の検出ルーチン時）には検出スイッチ32のON、OFF
によって電磁弁４の閉弁時間を設定する。即ち、検出ス
イッチ32がONの場合には電磁弁４の閉弁時間を長時間
（例えば15秒）に設定し、検出スイッチ32がOFFの場合
には電磁弁４の閉弁時間を短時間（例えば５秒）に設定
して、それぞれこの状態を扉23が開、A/Cスイッチ15又
は冷蔵スイッチ16がOFFとなるまで継続する。When the door 23 is closed, the controller 14 stores that the door 23 was opened in the previous detection routine (n-1), or the controller 14 does not store the state (n
= 1 detection routine) ON / OFF of the detection switch 32
The closing time of the solenoid valve 4 is set by. That is, when the detection switch 32 is ON, the closing time of the solenoid valve 4 is set to a long time (for example, 15 seconds), and when the detection switch 32 is OFF, the closing time of the solenoid valve 4 is set to a short time (for example, 15 seconds). (For example, 5 seconds), and this state is continued until the door 23 is opened and the A / C switch 15 or the refrigeration switch 16 is turned off.
一方、（ｎ−１）の検出ルーチン時の扉23の状態が閉で
あれば、前回の検出ルーチン時の状態を継続する。On the other hand, if the state of the door 23 in the (n-1) detection routine is closed, the state of the previous detection routine is continued.
しかして、冷蔵室17の扉23が開の場合には冷蔵室17内の
被冷蔵物の多少に拘らず検出スイッチ32の信号をキャン
セルして電磁弁４の閉弁時間を短縮して冷房用熱交換器
６の冷房能力を増大する。When the door 23 of the refrigerating compartment 17 is opened, the signal of the detection switch 32 is canceled regardless of the amount of the refrigerating compartment 17 to be refrigerated and the closing time of the solenoid valve 4 is shortened for cooling. The cooling capacity of the heat exchanger 6 is increased.
（考案の効果） 本考案においては、冷蔵庫内の被冷蔵物の重量を検出す
ることによって冷凍用熱交換器の冷凍負荷を検出し、こ
の検出値に応じて制御手段により冷凍用熱交換器及び冷
房用熱交換器に冷媒を流す時間比率を変更するので、冷
凍用熱交換器の冷凍負荷を正確に検出することができ、
従って、冷凍能力が無駄に消費されるのを防止して冷房
能力を向上できる。(Effect of the Invention) In the present invention, the refrigerating load of the refrigerating heat exchanger is detected by detecting the weight of the object to be refrigerated in the refrigerator, and the refrigerating heat exchanger and the refrigerating heat exchanger are detected by the control means according to the detected value. Since the time ratio of flowing the refrigerant to the cooling heat exchanger is changed, the refrigerating load of the refrigerating heat exchanger can be accurately detected,
Therefore, the cooling capacity can be prevented from being wasted and the cooling capacity can be improved.
また、本考案においては、扉開閉検出手段が扉閉を検出
したときは、負荷検出手段からの入力による制御状態を
継続するが、扉開閉検出手段が扉開を検出したときには
負荷検出手段からの入力をキャンセルするので、扉開時
における冷凍能力の浪費を防止して冷房能力を増大でき
る。Further, in the present invention, when the door opening / closing detecting means detects the door closing, the control state by the input from the load detecting means is continued, but when the door opening / closing detecting means detects the door opening, the load detecting means detects the door opening. Since the input is canceled, it is possible to prevent the refrigerating capacity from being wasted when the door is opened and increase the cooling capacity.
第１図ないし第４図は本考案の実施例を示し、第１図は
冷蔵庫の部分的断面図、第２図は部分的系統図、第３図
は電磁弁及び定圧膨張弁の開閉に伴う蒸発圧力の時間的
変化を示す線図、第４図はフローチャートである。 第５図ないし第７図は従来の車両用冷凍装置の１例を示
し、第５図は系統図、第６図は電磁弁の開閉に伴う蒸発
圧力の時間的変化を示す線図、第７図は冷蔵庫の断面図
である。 コンプレッサ…１、コンデンサ…２、電磁弁…４、冷房
用膨張弁…５、冷房用熱交換器…６、冷凍用定圧膨張弁
…７、冷凍用熱交換器…９、冷蔵庫…11、冷凍負荷検出
手段…32、扉開閉検出手段…34、制御手段…14。1 to 4 show an embodiment of the present invention, FIG. 1 is a partial sectional view of a refrigerator, FIG. 2 is a partial system diagram, and FIG. 3 is associated with opening and closing of a solenoid valve and a constant pressure expansion valve. FIG. 4 is a flow chart showing the time-dependent change in evaporation pressure. FIGS. 5 to 7 show an example of a conventional vehicle refrigeration system, FIG. 5 is a system diagram, and FIG. 6 is a diagram showing temporal changes in evaporation pressure due to opening and closing of a solenoid valve. The figure is a sectional view of the refrigerator. Compressor ... 1, Condenser ... 2, Solenoid valve ... 4, Cooling expansion valve ... 5, Cooling heat exchanger ... 6, Freezing constant pressure expansion valve ... 7, Freezing heat exchanger ... 9, Refrigerator ... 11, Refrigerating load Detecting means 32, door opening / closing detecting means 34, control means 14.
Claims (1)
空気を冷却するための冷房用熱交換器及び冷蔵庫内の空
気を冷却するための冷凍用熱交換器に予め設定された時
間比率に基づいて交互に冷媒を流して蒸発させる車両用
冷凍装置において、上記冷蔵庫内の被冷蔵物の重量を検
出する負荷検出手段と、上記冷蔵庫の扉の開閉を検出す
る扉開閉検出手段と、上記負荷検出手段からの指令を受
けて上記冷房用熱交換器及び上記冷凍用熱交換器に冷媒
を流す時間比率を変更すると共に上記扉開閉検出手段が
扉閉を検出したとき上記負荷検出手段からの入力による
制御状態を継続し、上記扉開閉検出手段が扉開を検出し
たときのみ上記負荷検出手段からの入力をキャンセルす
る制御手段を設けたことを特徴とする車両用冷凍装置。1. A preset time of a heat exchanger for cooling for cooling air inside a vehicle and a heat exchanger for refrigeration for cooling air inside a refrigerator, which are interposed in parallel in a refrigerant circulation circuit. In a vehicle refrigeration device that alternately flows and evaporates a refrigerant based on a ratio, load detection means for detecting the weight of the object to be refrigerated in the refrigerator, and door opening / closing detection means for detecting opening / closing of the refrigerator door, In response to a command from the load detecting means, the time ratio of flowing the refrigerant to the cooling heat exchanger and the freezing heat exchanger is changed, and when the door opening / closing detecting means detects door closing, the load detecting means The vehicle refrigerating apparatus is provided with a control means for continuing the control state by the input, and canceling the input from the load detecting means only when the door opening / closing detecting means detects the door opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988037187U JPH0648276Y2 (en) | 1988-03-23 | 1988-03-23 | Vehicle refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988037187U JPH0648276Y2 (en) | 1988-03-23 | 1988-03-23 | Vehicle refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01140479U JPH01140479U (en) | 1989-09-26 |
| JPH0648276Y2 true JPH0648276Y2 (en) | 1994-12-12 |
Family
ID=31263765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988037187U Expired - Lifetime JPH0648276Y2 (en) | 1988-03-23 | 1988-03-23 | Vehicle refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648276Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57144856A (en) * | 1981-03-05 | 1982-09-07 | Nippon Denso Co | Air conditioner for vehicle |
-
1988
- 1988-03-23 JP JP1988037187U patent/JPH0648276Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01140479U (en) | 1989-09-26 |
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