JPS62283016A - Cooling and refrigeration controlling system of vehicle - Google Patents
Cooling and refrigeration controlling system of vehicleInfo
- Publication number
- JPS62283016A JPS62283016A JP12499386A JP12499386A JPS62283016A JP S62283016 A JPS62283016 A JP S62283016A JP 12499386 A JP12499386 A JP 12499386A JP 12499386 A JP12499386 A JP 12499386A JP S62283016 A JPS62283016 A JP S62283016A
- Authority
- JP
- Japan
- Prior art keywords
- refrigeration
- cooling
- solenoid valve
- evaporator
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 77
- 238000005057 refrigeration Methods 0.000 title claims description 81
- 239000003507 refrigerant Substances 0.000 claims abstract description 68
- 238000007710 freezing Methods 0.000 claims abstract description 32
- 230000008014 freezing Effects 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000010257 thawing Methods 0.000 abstract 2
- 238000001514 detection method Methods 0.000 description 12
- 238000004378 air conditioning Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 2
- MMOXZBCLCQITDF-UHFFFAOYSA-N N,N-diethyl-m-toluamide Chemical compound CCN(CC)C(=O)C1=CC=CC(C)=C1 MMOXZBCLCQITDF-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/321—Control means therefor for preventing the freezing of a heat exchanger
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
（産業上の利用分野）
本発明は冷媒圧縮機の余剰能力を利用して、車両に設置
された冷蔵装置の冷凍能力を高めるようにした車両用冷
房・冷蔵制御システムに関する。[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention utilizes the surplus capacity of a refrigerant compressor to increase the refrigeration capacity of a refrigeration system installed in a vehicle. Regarding vehicle cooling/refrigeration control systems.
（従来の技術）
近時の所謂ワンボックスカーと称される車両には、車室
用の冷房装置の他に、ジュース等を冷し更には製氷可能
な冷蔵庫等の冷蔵装置を装備したものがあり、これらの
冷房および冷蔵装置は一般にそれぞれ専用のエバポレー
タを備え、それらに単一の冷媒圧縮機を介装して冷房用
・冷蔵用に両用させていた。(Prior Art) Modern vehicles, so-called one-box cars, are equipped not only with air-conditioning devices for the passenger compartment but also with refrigeration devices such as refrigerators that can cool juices and even make ice. Generally, these air-conditioning and refrigeration systems each have a dedicated evaporator, and a single refrigerant compressor is interposed between them, allowing them to be used for both cooling and refrigeration purposes.
しかし、これらの冷房および冷蔵装置では概して冷房お
よび、冷凍能力不足になりがちなため、近時では例えば
特開昭５７−１４４８５６号公報のように、冷蔵用エバ
ポレータの吹出口温度によって各エバポレータに対する
冷媒の供給を制御し、車室の冷房と冷蔵庫等の冷凍を交
互に行なうようにしており、その際の冷房用エバポレー
タの凍結防止手段として、該エバポレータの吹出口温度
を検知し冷媒圧縮機の運転を停止させる、所謂デフロス
ト・サーモスイッチが用いられている。However, these air-conditioning and refrigeration systems tend to lack cooling and refrigeration capacity, so recently, as in Japanese Patent Laid-Open No. 57-144856, refrigerant is adjusted to each evaporator depending on the outlet temperature of the refrigeration evaporator. The system controls the supply of refrigerant to alternately cool the vehicle compartment and freeze the refrigerator, etc. At that time, as a means to prevent the cooling evaporator from freezing, the temperature at the outlet of the evaporator is detected and the refrigerant compressor is operated. A so-called defrost thermoswitch is used to stop the
（発明が解決しようとする問題点）
ところで、このような冷房装置と冷凍装置の交互運転中
には、冷房用エバポレータの凍結防止のために上記デフ
ロスト・サーモスイッチが作動して、冷媒圧縮機が一時
的に駆動を停止することがあり、この場合には冷蔵用エ
バポレータの冷蔵作用が休止されるため、庫内温度が上
昇して冷蔵機能が低下することになる。(Problem to be Solved by the Invention) By the way, during such alternate operation of the cooling system and the freezing system, the defrost/thermo switch is activated to prevent the cooling evaporator from freezing, and the refrigerant compressor is activated. The drive may be temporarily stopped, and in this case, the refrigerating action of the refrigerating evaporator is suspended, causing the temperature inside the refrigerator to rise and the refrigerating function to deteriorate.
本発明はこのような問題を解決し、冷媒圧縮機の余剰能
力を有効に利用することにより、冷媒圧縮機を停止させ
ることなく、冷蔵用エバポレータに冷媒を供給して冷凍
能力の向上を図るようにした、車両用冷房・冷蔵制御シ
ステムを提供することを目的とする。The present invention solves these problems and effectively utilizes the surplus capacity of the refrigerant compressor to supply refrigerant to the refrigeration evaporator and improve the refrigerating capacity without stopping the refrigerant compressor. The purpose of this technology is to provide a vehicle cooling/refrigeration control system.
（問題点を解決するための手段）
このため、本発明の車両用冷房・冷蔵制御システムは、
冷媒圧縮機と冷房用エバポレータを介装した冷房回路に
、冷蔵用エバポレータを介装した冷蔵回路を前記冷房用
エバポレータと並列に接続し、これらエバポレータの各
冷媒供給路に電磁弁を開閉可能に配設し、かつこれら電
磁弁をタイマによって交互に開閉させ、冷房運転と冷蔵
運転を交互に行なうようにし、デフロスト・サーモスイ
ッチにより冷媒圧縮機の運転休止を行なうようにした車
両用冷房・冷蔵制御システムにおいて、デフロスト・サ
ーモスイッチによる凍結限界温度検出時に電磁弁の現状
の開閉モードを解除して、冷蔵側の電磁弁を優先的に開
弁し冷蔵運転を優先させる一方、前記温度検出後デフロ
スト・サーモスイッチが非凍結温度を検出するまで冷蔵
運転を続行させ、がっデフロスト・サーモスイッチの凍
結限界温度検出後も冷媒圧縮機を駆動させるようにして
、冷媒圧縮機の余剰能力を活用し冷蔵機能の向上を図る
ようにしたことを特徴としている。(Means for solving the problem) Therefore, the vehicle cooling/refrigeration control system of the present invention has the following features:
A refrigeration circuit having a refrigerant compressor and a cooling evaporator interposed therein is connected in parallel with the cooling evaporator, and a solenoid valve is arranged in each refrigerant supply path of these evaporators to be able to open and close. A vehicle cooling/refrigeration control system in which the solenoid valves are alternately opened and closed by a timer to alternately perform cooling operation and refrigeration operation, and the refrigerant compressor is stopped by a defrost thermoswitch. When the freezing limit temperature is detected by the defrost/thermo switch, the current open/close mode of the solenoid valve is canceled and the solenoid valve on the refrigeration side is opened preferentially to give priority to refrigeration operation. The refrigeration operation continues until the switch detects a non-freezing temperature, and the refrigerant compressor continues to operate even after the defrost/thermo switch detects the freezing limit temperature, making use of the extra capacity of the refrigerant compressor. It is characterized by the fact that it is designed to improve its performance.
また、本発明の車両用冷房・冷蔵制御システムは、冷媒
圧縮機と冷房用エバポレータを介装した冷房回路に、冷
蔵用エバポレータを介装した冷蔵回路を前記冷房用エバ
ポレータと並列に接続し、これらエバポレータの各冷媒
供給路に電磁弁を開閉可能に配設し、かつこれら電磁弁
をタイマによって交互に開閉させ、冷房運転と冷蔵運転
を交互に行なうようにし、デフロスト・サーモスイッチ
により冷媒圧縮機の運転休止を行なうようにした車両用
冷房・冷蔵制御システムにおいて、デフロスト・サーモ
スイッチによる凍結限界温度検出時に電磁弁の現状の開
閉モードを解除して、冷蔵側の電磁弁を優先的に開弁し
冷蔵運転を〜６−
優先させる一方、前記温度検出後は両電磁弁を交互に間
欠的に開弁させて冷蔵運転と冷房運転を交互に行なわせ
、かつ前記温度検出後デフロスト・サーモスイッチが非
凍結温度を検出するまでの冷蔵運転停止時に、冷媒圧縮
機の駆動を停止させるようにして、車室等の冷房状態を
損なわずに冷蔵庫等の冷凍能力を高め、しかもその際の
冷媒圧縮機の負担を軽減させるようにしたことを特徴と
している。Further, in the vehicle cooling/refrigeration control system of the present invention, a refrigeration circuit including a refrigerant compressor and a cooling evaporator is connected in parallel with the cooling evaporator, and a refrigeration circuit including a refrigeration evaporator is connected in parallel with the cooling evaporator. A solenoid valve is installed in each refrigerant supply path of the evaporator so that it can be opened and closed, and these solenoid valves are alternately opened and closed by a timer to perform cooling operation and refrigeration operation alternately, and a defrost thermoswitch is used to control the refrigerant compressor. In a vehicle cooling/refrigeration control system that is designed to suspend operation, when the defrost/thermo switch detects the freezing limit temperature, the current open/close mode of the solenoid valve is canceled and the solenoid valve on the refrigeration side is opened preferentially. While giving priority to the refrigeration operation ~6-, after the temperature detection, both solenoid valves are opened intermittently to alternately perform the refrigeration operation and the cooling operation, and after the temperature detection, the defrost/thermo switch is turned off. By stopping the refrigerant compressor when the refrigeration operation is stopped until freezing temperature is detected, the refrigerant compressor is increased to increase the refrigerating capacity of the refrigerator without impairing the cooling condition of the passenger compartment. It is characterized by being designed to reduce the burden.
（実施例）
以下、本発明の一実施例を図面により説明すると、第１
図および第２図において１は冷媒圧縮機で、電磁クラッ
チ２を介してエンジンの駆動力に係脱可能に連係されて
おり、その吸入口と吐出口に接続された冷房用冷媒導管
３の管路に、コンデンサ４と冷房用エバポレータ５が介
装されている。(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.
In the figures and FIG. 2, reference numeral 1 denotes a refrigerant compressor, which is removably connected to the driving force of the engine via an electromagnetic clutch 2, and a cooling refrigerant conduit 3 connected to its suction port and discharge port. A condenser 4 and a cooling evaporator 5 are interposed in the passageway.
上記、冷房用エバポレータ５の両端には、冷蔵用冷媒導
管６が並列に接続され、該導管６に冷蔵用エバポレータ
７が介装されている。Refrigerant refrigerant conduits 6 are connected in parallel to both ends of the cooling evaporator 5, and a refrigerant evaporator 7 is interposed in the conduits 6.
この冷蔵用エバポレータ７は、車室内の適所に設置され
た冷蔵庫等の冷蔵装置内部に配設されており、該エバポ
レータ７と前記エバポレータ５の各冷媒導管３，６に、
それらを開閉する電磁弁８．９が介装されている。This refrigerating evaporator 7 is arranged inside a refrigerating device such as a refrigerator installed at a suitable place in the vehicle interior, and each refrigerant conduit 3, 6 of the evaporator 7 and the evaporator 5 has a
A solenoid valve 8.9 is interposed to open and close them.
電磁弁８．９は互いに交互に開閉可能にされ、その開閉
時期と開閉時間を制御装置１０によって制御されている
。すなわち、上記制御袋Ｎ１０は電磁弁８，９の開閉時
期と開閉時間を規定する後述のタイマ（図示略）を備え
、それらの制御関係は第２図に示すように互いに逆相の
関係にあって、一方の電磁弁が開弁された場合は他方の
電磁弁が閉弁され、一方の電磁弁の開弁時間が他方・の
電磁弁の閉弁時間に相当している。The solenoid valves 8.9 can be alternately opened and closed, and their opening/closing timing and opening/closing time are controlled by the control device 10. That is, the control bag N10 is equipped with a timer (not shown), which will be described later, that defines the opening/closing timing and opening/closing time of the electromagnetic valves 8 and 9, and the control relationship between them is in opposite phase to each other as shown in FIG. When one solenoid valve is opened, the other solenoid valve is closed, and the opening time of one solenoid valve corresponds to the closing time of the other solenoid valve.
この場合、実施例では冷房側の電磁弁８は３０秒間ＯＮ
（開）、１５秒間開ＦＦ （閉）に設定され、したがっ
て冷蔵側の電磁弁９は３０秒間ＯＦＦ （閉）、１５秒
間ＯＮ（開）に規定されていて、それらの各開弁時に対
応するエバポレータ５，７に冷媒を供給可能にしている
。このうち、電磁弁８．９の開閉時期は、後述するデフ
ロスト・サーモスイッチ（以下、単にサーモスイッチと
呼ぶ）の信号によって一時的に変更され、その信号毎に
電磁弁９の開弁が優先されている。In this case, in the embodiment, the cooling side solenoid valve 8 is turned on for 30 seconds.
Therefore, the solenoid valve 9 on the refrigeration side is set to be OFF (closed) for 30 seconds and ON (open) for 15 seconds, corresponding to each opening. Refrigerant can be supplied to the evaporators 5 and 7. Among these, the opening/closing timing of the solenoid valve 8.9 is temporarily changed by a signal from a defrost thermoswitch (hereinafter simply referred to as a thermoswitch), which will be described later, and the opening of the solenoid valve 9 is given priority for each signal. ing.
上記サーモスイッチ１１は冷房用エバポレータ５の所定
温度、すなわち凍結限界温度と非凍結温度を検出して、
その検出信号Ｓ Ｉ １ ｒＳＩ２を制御装置１０へ入
力するようにされ、かつその入力後にＯＮまたはＯＦＦ
可能にされている。すなわち、サーモスイッチ１１は図
示を省略したクーラスイッチのＯＮ時に温度検出可能に
され、上記凍結限界温度検出時には検出信号Ｓ１１を制
御装置１０に入力後ＯＦＦ作動して、当該検温動作を維
持したまま後述するタイマの駆動を停止可能にされ、ま
た上記非凍結温度検出時には、検出信号Ｓ１２を制御装
置１１０に入力後ＯＮしてタイマを駆動可能にされてい
る。The thermoswitch 11 detects the predetermined temperature of the cooling evaporator 5, that is, the freezing limit temperature and the non-freezing temperature,
The detection signal S I 1 rSI2 is input to the control device 10, and after the input, it is turned ON or OFF.
is made possible. That is, the thermoswitch 11 is enabled to detect the temperature when the cooler switch (not shown) is turned on, and when the freezing limit temperature is detected, the detection signal S11 is input to the control device 10 and then turned off, and the temperature measurement operation is maintained as described below. When detecting the above-mentioned non-freezing temperature, the timer can be driven by turning on the detection signal S12 after inputting it to the control device 110.
上記タイマは前記サーモスイッチ１１によってＯＮ・Ｏ
ＦＦ制御され、前記サーモスイッチ１１からの検出信号
Ｓ目によりＯＦＦされ、同時に制御信号Ｓｏｌを電磁弁
８，９に出力して、それらの開閉モード初期状態、すな
わち電磁弁８を閉、電磁弁９を開に設定後０ＦＦＬ、か
つその間の開閉モードを維持するようにされている。The above timer is turned ON/OFF by the thermo switch 11.
It is FF-controlled and turned off by the detection signal S from the thermo switch 11, and at the same time outputs the control signal Sol to the solenoid valves 8 and 9 to bring them into their opening/closing mode initial state, that is, solenoid valve 8 is closed and solenoid valve 9 is turned off. After setting 0FFL to open, the open/close mode is maintained during that time.
更にタイマは上記検出信号ＳＩ２によりＯＮされ、同時
に制御信号Ｓ。２を電磁弁８，９に出力して、それらの
通常開閉モード、つまり電磁弁８の開弁時間と電磁弁９
の閉弁時間をｔ、とし、電磁弁８の閉弁時間と電磁弁９
の開弁時間をｔｂとする制御を復活可能にしている。Further, the timer is turned on by the detection signal SI2, and at the same time the control signal S is turned on. 2 to the solenoid valves 8 and 9 to determine their normal opening/closing mode, that is, the opening time of the solenoid valve 8 and the solenoid valve 9.
Let t be the closing time of the solenoid valve 8, and the closing time of the solenoid valve 8 and the solenoid valve 9.
This makes it possible to restore control that sets the valve opening time to tb.
そして、これらの一連のサーモスイッチ１１とタイマと
の信号の遺り取りの間は、冷媒圧縮機１に対する信号の
遺り取りは一切無く、したがって冷媒圧縮機１はサーモ
スイッチ１１のＯＮ時は勿論、ＯＦＦ時においても駆動
して、冷媒を供給可能にしている。During the transmission of signals between the thermoswitch 11 and the timer, there is no transmission of signals to the refrigerant compressor 1. Therefore, the refrigerant compressor 1 is not affected when the thermoswitch 11 is turned on. , is driven even when it is OFF, making it possible to supply refrigerant.
この他、図中１２．１３はエキスパンションバルブで、
それらの感熱筒１２ ａ ＋ １３ ａを対応するエバ
ポレータ５，７の出口部に設置させており、１４は送風
機、１５は冷房用冷媒導管３に介装された圧力スイッチ
で、該管３内の下限圧の検出時に冷媒圧縮機１の駆動を
停止させるようにしている。In addition, 12.13 in the figure is an expansion valve,
These heat-sensitive tubes 12 a + 13 a are installed at the outlet of the corresponding evaporators 5 and 7, 14 is a blower, and 15 is a pressure switch installed in the cooling refrigerant conduit 3. The drive of the refrigerant compressor 1 is stopped when the lower limit pressure is detected.
第３図は本発明と別の制御システムを示すタイミングチ
ャートで、前述の発明と対応する構成部分には同一の符
号を用いている。すなわち、この発明ではサーモスイッ
チ１１のＯＦＦ時にもタイマを駆動させ、その際タイ゛
マの現状の作動をキャンセルさせて、電磁弁８．９を前
記した開閉モード初期状態に移行させるとともに、それ
らの開閉時間を前記通常開閉モードに設定し、かつサー
モスイッチ１１のＯＦＦ時！ｆｉＩ七〇が電磁弁９の開
弁時間ｔｂよりも長いときは、電磁弁９の閉弁と同時に
例えばタイマから冷媒圧縮機１に停止信号を出力して、
サーモスイッチ１１のＯＦＦ時間の残存時間、すなわち
ｔ６時間冷媒圧縮機１の駆動を停止させ、その負担を軽
減させるようにしたことを特徴としている。FIG. 3 is a timing chart showing a control system different from the present invention, in which the same reference numerals are used for components corresponding to those of the above-described invention. That is, in the present invention, the timer is driven even when the thermoswitch 11 is OFF, and at that time, the current operation of the timer is canceled, the solenoid valve 8.9 is shifted to the initial state of the opening/closing mode described above, and these When the opening/closing time is set to the normal opening/closing mode and the thermo switch 11 is OFF! When fiI70 is longer than the opening time tb of the solenoid valve 9, a stop signal is output from a timer to the refrigerant compressor 1 at the same time as the solenoid valve 9 is closed.
The present invention is characterized in that the driving of the refrigerant compressor 1 is stopped for the remaining time of the OFF time of the thermoswitch 11, that is, for t6 hours, thereby reducing the load on the refrigerant compressor 1.
（作用）
このように構成した制御システムにおいて、図示を省略
したクーラスイッチと冷蔵スイッチを相前後してＯＮす
ると、サーモスイッチ１１がＯＮＬ、て冷房用エバポレ
ータ５の表面温度を検出し始める。この場合、冷房運転
開始当初は上記温度が非凍結温度より高いため、サーモ
スイッチ１１はＯＮ状態を維持し、そのＯＮ状態に連動
して制御装置１０に備えたタイマが始動し、電磁弁８．
９に対する交互の開閉制御を開始する。(Function) In the control system configured as described above, when the cooler switch and the refrigeration switch (not shown) are turned ON one after the other, the thermoswitch 11 turns ON and begins to detect the surface temperature of the cooling evaporator 5. In this case, since the above-mentioned temperature is higher than the non-freezing temperature at the beginning of the cooling operation, the thermoswitch 11 maintains the ON state, and in conjunction with the ON state, the timer provided in the control device 10 starts, and the solenoid valve 8.
9 starts alternate opening/closing control.
すなわち、これらの状況は第２図に示すように、電磁弁
８がＯＮしているときは電磁弁９がＯＦＦしており、そ
れらの開閉時期は互いに逆相の関係にあって、電磁弁８
の開弁時間ｔ、が電磁弁９の閉弁時間に相当し、電磁弁
８の閉弁時間ｔ１が電磁弁９の開弁時間に相当していて
、それらの各開弁時に冷媒が冷房用または冷蔵用冷媒導
管３．６に導かれ、冷房用または冷蔵用エバポレータ５
．７に供給されて、冷房運転と冷蔵運転が交互に行なわ
れる。That is, in these situations, as shown in FIG. 2, when the solenoid valve 8 is ON, the solenoid valve 9 is OFF, and their opening and closing timings are in opposite phases to each other.
The opening time t of the solenoid valve 9 corresponds to the closing time of the solenoid valve 9, and the closing time t1 of the solenoid valve 8 corresponds to the opening time of the solenoid valve 9, and when these valves open, the refrigerant is used for cooling. Or it is led to the refrigerant conduit 3.6 for refrigeration, and is led to the evaporator 5 for cooling or refrigeration.
．． 7, and cooling operation and refrigeration operation are performed alternately.
冷房運転開始後ｔ１時間経過し、車室内の温度が低下し
て冷房用エバポレータ５の温度が凍結限界温度に達する
と、この温度がサーモスイッチ１１によって検出され、
その検出信号Ｓｌｌが制御装置ｉ１０に送られた後、サ
ーモスイッチ１１が一定時間、実施例では１ｃ時間ＯＦ
Ｆされる。When time t1 has elapsed after the start of the cooling operation and the temperature inside the vehicle has decreased and the temperature of the cooling evaporator 5 reaches the freezing limit temperature, this temperature is detected by the thermoswitch 11,
After the detection signal Sll is sent to the control device i10, the thermoswitch 11 is turned off for a certain period of time, 1c period in the embodiment.
F is given.
制御装置１０は上記信号Ｓ１．を取り入れ、かつこれを
前記タイマに転送して、タイマによる電磁弁８．９の開
閉時期の変更を促す。The control device 10 receives the signal S1. and transfers it to the timer to prompt the timer to change the opening/closing timing of the solenoid valve 8.9.
タイマは上記信号Ｓｌｌに基づいて、電磁弁８゜９に対
する現状の開閉モードを解除するとともに、その制御信
号Ｓ。□を電磁弁８，９に出力してＯＦＦされ、その後
はサーモスイッチ１１からの次期ＯＮ信号を待機する。The timer cancels the current opening/closing mode for the solenoid valve 8.9 based on the signal Sll, and also outputs the control signal S. □ is output to the solenoid valves 8 and 9 to turn them OFF, and then wait for the next ON signal from the thermoswitch 11.
上記制御信号ＳＯ，は電磁弁８，９に対する開閉モード
を初期状態、つまり冷房側の電磁弁８をＯＦＦ、冷蔵側
の電磁弁９をＯＮにそれぞれ設定することを内容として
いる。したがって、上記制御信号Ｓ０１が電磁弁８．９
に出力されると、それらは現状の開閉モードから直ちに
開閉モード初期状態に切り換えられ、電磁弁８が閉弁し
電磁弁９が開弁される。この状況は例えば第２図に示す
ように、電磁弁８がＯＮ、電磁弁９がＯＦＦの中途状態
においても、それらの切り換えが優先され、図示のよう
に電磁弁８がＯＦＦ、電磁弁９がＯＮされる。The control signal SO is intended to set the opening/closing modes of the solenoid valves 8 and 9 to the initial state, that is, to set the cooling side solenoid valve 8 to OFF and the refrigeration side solenoid valve 9 to ON. Therefore, the control signal S01 is applied to the solenoid valve 8.9.
When output to , they are immediately switched from the current open/close mode to the initial open/close mode, and the solenoid valve 8 is closed and the solenoid valve 9 is opened. In this situation, for example, as shown in FIG. 2, even if the solenoid valve 8 is in the ON state and the solenoid valve 9 is in the OFF state, priority is given to switching between them. It will be turned on.
この結果、冷房用エバポレータ５に対する冷媒の供給が
停止されて冷房運転が停止する一方、冷蔵用エバボレー
タフに対する冷媒の供給が再開されて、冷蔵運転が行な
われる。As a result, the supply of refrigerant to the cooling evaporator 5 is stopped and the cooling operation is stopped, while the supply of refrigerant to the refrigeration evaporator trough is restarted and the refrigeration operation is performed.
したがって、この場合のようにタイマによる制御の下で
は本来冷蔵運転が停止される状況にも拘わらず、冷蔵運
転が行なわれ、しかもその運転時期が早められるから、
冷蔵庫等に対する冷凍能力が高められ、庫内冷蔵が継続
されることとなる。一方、このように冷房運転に代えて
冷蔵運転を優先させても、その運転は後述のようにサー
モスイッチ１１が非凍結温度を検出する一定時間内に限
られるから、車室内の冷房環境を損なうことはない。Therefore, under timer control as in this case, even though the refrigeration operation would normally have been stopped, the refrigeration operation is carried out, and the operation timing is brought forward.
The refrigeration capacity of refrigerators, etc. will be increased, and internal refrigeration will continue. On the other hand, even if refrigeration operation is given priority in place of cooling operation in this way, the operation is limited to a certain period of time during which the thermo switch 11 detects a non-freezing temperature, as described later, and this will impair the cooling environment in the vehicle interior. Never.
こうして冷蔵運転が続行されている間に冷房停止中のエ
バポレータ５の温度が次第に上昇する。そして、冷房停
止からｔｃ時間経過後に非凍結温度に達すると、この温
度がサーモスイッチ１１によって検出され、その検出信
号ＳＩ２が制御装置１０に送られる。制御装置１０は上
記信号Ｓ１２を取り入れ、かつこれをタイマに転送して
、タイマをＯＮさせる。In this way, while the refrigeration operation continues, the temperature of the evaporator 5, which is in the cooling-off state, gradually rises. When the non-freezing temperature is reached after a period of time tc has elapsed since the cooling was stopped, this temperature is detected by the thermoswitch 11 and the detection signal SI2 is sent to the control device 10. The control device 10 takes in the signal S12, transfers it to the timer, and turns on the timer.
タイマは上記信号Ｓ、２によって始動すると同時に電磁
弁８，９に制御信号Ｓ。２を出力して、それらの開閉モ
ードを切り換えるとともに以降の開閉時期の制御を再開
する。The timer is started by the above-mentioned signals S and 2, and at the same time a control signal S is sent to the solenoid valves 8 and 9. 2 is output to switch the opening/closing modes and restart control of subsequent opening/closing timing.
このため、上記制御信号Ｓｏ２によって電磁弁８がＯＮ
、電磁弁９がＯＦＦに切り換わり、冷蔵用エバポレータ
７に対する冷媒の供給が停止されて冷蔵運転が停止され
る一方、冷房用エバポレータ５に対する冷媒の供給が行
なわれて、冷房運転が再開される。冷房運転再開後タイ
マはサーモスイッチ１１がＯＮした時点、つまり第２図
上ｔ２を基点として電磁弁８．９を通常開閉モードに開
閉制御し、冷房運転と冷蔵運転を交互に行なわせる。Therefore, the solenoid valve 8 is turned ON by the control signal So2.
, the electromagnetic valve 9 is turned OFF, the supply of refrigerant to the refrigeration evaporator 7 is stopped, and the refrigeration operation is stopped, while the refrigerant is supplied to the cooling evaporator 5, and the cooling operation is restarted. After the cooling operation is resumed, the timer controls the opening and closing of the solenoid valve 8.9 to the normal opening/closing mode from the time when the thermo switch 11 is turned on, that is, from t2 in FIG. 2, to alternately perform the cooling operation and the refrigeration operation.
こうして冷房運転が間欠的に繰り返されると、車室内の
温度が次第に低下し、冷房用エバポレータ５の温度が凍
結限界温度に近づく。When the cooling operation is repeated intermittently in this manner, the temperature inside the vehicle compartment gradually decreases, and the temperature of the cooling evaporator 5 approaches the freezing limit temperature.
そして、ｔ９時に上記温度が凍結限界温度に到達すると
、この温度がサーモスイッチ１１によって検出され、そ
の検出信号Ｓｌ、を制御装置１０に送ると同時に一定時
間、実施例ではｔｄ時時間ＦＦされる。When the temperature reaches the freezing limit temperature at time t9, this temperature is detected by the thermoswitch 11, and the detection signal Sl is sent to the control device 10, and at the same time, it is turned off for a certain period of time, td in the embodiment.
制御装置１０は上記信号Ｓｔｔを取り入れ、かつこれを
タイマに転送して、タイマによる電磁弁８．９の開閉時
期の変更を促す。タイマは上記信号３１１に基づいて現
状の開閉モードを解除するとともに、その制御信号Ｓ６
１を電磁弁８．９に出力した後ＯＦＦされ、その後はサ
ーモスイッチ１１がらの次期ＯＮ信号を待機する。一方
、制御信号Ｓ０１が電磁弁８゜９に出力されると、それ
らは現状の開閉モードから直ちに開閉モード初期状態に
切り換えられ、電磁弁８が閉弁すると同時に電磁弁９が
開弁される。The control device 10 takes in the signal Stt, transfers it to the timer, and prompts the timer to change the opening/closing timing of the solenoid valve 8.9. The timer releases the current opening/closing mode based on the signal 311, and also releases the control signal S6.
1 is output to the solenoid valve 8.9, it is turned OFF, and then waits for the next ON signal from the thermoswitch 11. On the other hand, when the control signal S01 is output to the solenoid valves 8.9, they are immediately switched from the current open/close mode to the initial open/close mode, and the solenoid valve 9 is opened at the same time as the solenoid valve 8 is closed.
このような制御は例えば第２図に示すように、電磁弁８
がＯＦＦ、電磁弁９がＯＮの中途状態、したがって上記
制御モードと同様な状況下においても行なわれる。した
がって、電磁弁９は１Ｓ直前の開弁時間と、サーモスイ
ッチ１１がＯＦＦしているｔｄ暗時間累積した時間分開
弁し、この反対に電磁弁８はｔ３直前の閉弁時間と、サ
ーモスイッチ１１がＯＦＦしているｔｄ暗時間累積した
時間分閉弁する。したがって、この場合には電磁弁９の
開弁時間累積骨、冷蔵用エバボレータフに冷媒が供給さ
れ、冷蔵運転時間が延長されることとなるから、冷蔵機
能が一層増進されることとなる。For example, as shown in FIG.
is OFF and the solenoid valve 9 is ON, which is also performed under the same situation as in the control mode described above. Therefore, the solenoid valve 9 is opened for the cumulative time of the opening time just before 1S and the td dark time when the thermoswitch 11 is OFF, and on the contrary, the solenoid valve 8 is opened for the valve closing time just before t3 and the cumulative time of the td dark time when the thermoswitch 11 is OFF. The valve is closed for the accumulated time of the td dark time when is OFF. Therefore, in this case, the refrigerant is supplied to the cumulative opening time of the electromagnetic valve 9 and the refrigeration evaporator trough, and the refrigeration operation time is extended, so that the refrigeration function is further improved.
こうして冷蔵運転が続行している間、冷房停止中のエバ
ポレータ５では次第に温度が上昇し、ｔ、後ｔｄ時間経
過して非凍結温度に達すると、この温度がサーモスイッ
チ１１によって検出され、その検出信号Ｓ１２が制御装
置１０に送られて、電磁弁８．９の開閉モードが切り換
えられ、以後同様にして冷房運転と冷蔵運転が交互に行
なわれ、その間冷媒圧縮機１が駆動し続ける。While the refrigeration operation continues in this way, the temperature of the evaporator 5, which is in the cooling stopped state, gradually rises, and when it reaches the non-freezing temperature after time t and td, this temperature is detected by the thermoswitch 11. A signal S12 is sent to the control device 10 to switch the opening/closing mode of the solenoid valve 8.9, and thereafter cooling operation and refrigeration operation are performed alternately in the same manner, during which the refrigerant compressor 1 continues to be driven.
（発明の効果）
本発明の車両用冷房・冷蔵制御システムは以上のように
、冷媒圧縮機と冷房用エバポレータを介装した冷房回路
に、冷蔵用エバポレータを介装した冷蔵回路を前記冷房
用エバポレータと並列に接続し、これらエバポレータの
各冷供媒給路に電磁弁を開閉可能に配設し、かつこれら
電磁弁をタイマによって交互に開閉させ、冷房運転と冷
蔵運転を交互に行なうようにし、デフロスト・サーモス
イッチにより冷媒圧縮機の運転休止を行なうようにした
車両用冷房・冷蔵制御システムにおいて、デフロスト・
サーモスイッチによる凍結限界温度検出時に電磁弁の現
状の開閉モードを解除して、冷蔵側の電磁弁を優先的に
開弁じ冷蔵運転を優先させる一方、前記温度検出後デフ
ロスト・サーモスイッチが非凍結温度を検出するまで冷
蔵運転を続行させ、かつデフロスト・サーモスイッチの
凍結限界温度検出後も冷媒圧縮機を駆動させるようにし
たから、冷媒圧縮機がサーモスイッチの冷房下限温度検
出後においても、駆動し得るにも拘わらず駆動停止を余
儀無くされていた従来の制御システムを改善して、上記
状況下における冷媒圧縮機の云わば余剰能力を有効に利
用することができ、しかも冷蔵庫等の急速冷蔵ないし高
速冷凍を図れる効果がある。(Effects of the Invention) As described above, the vehicle cooling and refrigeration control system of the present invention includes a cooling circuit having a refrigerant compressor and a cooling evaporator interposed therein, and a refrigerating circuit having a refrigerating evaporator interposed therebetween. are connected in parallel to each other, and solenoid valves are arranged to be openable and closable in each refrigerant supply path of these evaporators, and these solenoid valves are alternately opened and closed by a timer to alternately perform cooling operation and refrigeration operation, In a vehicle cooling/refrigeration control system that uses a defrost thermoswitch to shut down the refrigerant compressor, the defrost thermoswitch
When the freezing limit temperature is detected by the thermoswitch, the current open/close mode of the solenoid valve is canceled and the solenoid valve on the refrigeration side is opened preferentially to give priority to refrigeration operation. Refrigeration operation continues until the temperature is detected, and the refrigerant compressor is driven even after the defrost/thermo switch detects the freezing limit temperature. By improving the conventional control system, which forced the drive to stop even though the refrigerant compressor was in use, it is possible to effectively utilize the so-called surplus capacity of the refrigerant compressor under the above conditions. It has the effect of achieving high-speed freezing.
また、本発明の車両用冷房・冷蔵制御システムは、冷媒
圧縮機と冷房用エバポレータを介装した冷房回路に、冷
蔵用エバポレータを介装した冷蔵回路を前記冷房用エバ
ポレータと並列に接続し、これらエバポレータの各冷媒
供給路に電磁弁を開閉可能に配設し、かつこれら電磁弁
をタイマによって交互に開閉させ、冷房運転と冷蔵運転
を交互に行なうようにし、デフロスト・サーモスイッチ
により冷媒圧縮機の運転休止を行なうようにした車両用
冷房・冷蔵制御システムにおいて、デフロスト・サーモ
スイッチによる凍結限界温度検出時に電磁弁の現状の開
閉モードを解除して、冷蔵側の電磁弁を優先的に開弁じ
冷蔵運転を優先させる一方、前記温度検出後は両電磁弁
を交互に間欠的に開弁させて冷蔵運転と冷房運転を交互
に行なわせ、かつ前記温度検出後デフロスト・サーモス
イッチが非凍結温度を検出するまでの冷蔵運転停止時に
、冷媒圧縮機の駆動を停止させるようにしたから、車室
等の冷房環境を損なわずに冷蔵庫等の冷凍能力を高める
ことができ、しかもその場合の冷媒圧縮機の負担を軽減
し得る等の効果がある。Further, in the vehicle cooling/refrigeration control system of the present invention, a refrigeration circuit including a refrigerant compressor and a cooling evaporator is connected in parallel with the cooling evaporator, and a refrigeration circuit including a refrigeration evaporator is connected in parallel with the cooling evaporator. A solenoid valve is installed in each refrigerant supply path of the evaporator so that it can be opened and closed, and these solenoid valves are alternately opened and closed by a timer to perform cooling operation and refrigeration operation alternately, and a defrost thermoswitch is used to control the refrigerant compressor. In a vehicle cooling/refrigeration control system that is designed to suspend operation, when the defrost/thermo switch detects the freezing limit temperature, the current open/close mode of the solenoid valve is canceled and the solenoid valve on the refrigeration side is opened preferentially and the refrigeration is started. While prioritizing operation, after the temperature detection, both solenoid valves are opened intermittently to alternately perform refrigeration operation and cooling operation, and after the temperature detection, the defrost/thermo switch detects a non-freezing temperature. Since the drive of the refrigerant compressor is stopped when the refrigeration operation is stopped until This has the effect of reducing the burden.
第１図は本発明の一実施例を示す制御システムの説明図
、第２図および第３図は本発明の制御系を示すタイミン
グチャートである。
１・・・冷媒圧縮機、５・・・冷房用エバポレータ。
７・・・冷蔵用エバポレータ、８，９・・・電磁弁。
１１・・・デフロスト・サーモスイッチ特許出願人
ヂーゼル機器株式会社
＝２１−FIG. 1 is an explanatory diagram of a control system showing one embodiment of the present invention, and FIGS. 2 and 3 are timing charts showing the control system of the present invention. 1... Refrigerant compressor, 5... Cooling evaporator. 7... Refrigeration evaporator, 8, 9... Solenoid valve. 11... Defrost thermoswitch patent applicant
Diesel Equipment Co., Ltd.=21-
Claims (2)
回路に、冷蔵用エバポレータを介装した冷蔵回路を前記
冷房用エバポレータと並列に接続し、これらエバポレー
タの各冷媒供給路に電磁弁を開閉可能に配設し、かつこ
れら電磁弁をタイマによって交互に開閉させ、冷房運転
と冷蔵運転を交互に行なうようにし、デフロスト・サー
モスイッチにより冷媒圧縮機の運転休止を行なうように
した車両用冷房・冷蔵制御システムにおいて、デフロス
ト・サーモスイッチによる凍結限界温度検出時に電磁弁
の現状の開閉モードを解除して、冷蔵側の電磁弁を優先
的に開弁し冷蔵運転を優先させる一方、前記温度検出後
デフロスト・サーモスイッチが非凍結温度を検出するま
で冷蔵運転を続行させ、かつデフロスト・サーモスイッ
チの凍結限界温度検出後も冷媒圧縮機を駆動させるよう
にしたことを特徴とする車両用冷房・冷蔵制御システム
。(1) A refrigeration circuit equipped with a refrigerant evaporator is connected to a cooling circuit equipped with a refrigerant compressor and a cooling evaporator in parallel with the cooling evaporator, and a solenoid valve is opened and closed in each refrigerant supply path of these evaporators. In this vehicle cooling system, the solenoid valves are alternately opened and closed by a timer to perform cooling operation and refrigeration operation alternately, and the refrigerant compressor is stopped by a defrost thermoswitch. In a refrigeration control system, when the defrost/thermo switch detects the freezing limit temperature, the current open/close mode of the solenoid valve is canceled and the solenoid valve on the refrigeration side is opened preferentially to give priority to refrigeration operation. Vehicle cooling/refrigeration control characterized by continuing the refrigeration operation until the defrost thermoswitch detects a non-freezing temperature, and driving the refrigerant compressor even after the defrost thermoswitch detects the freezing limit temperature. system.
回路に、冷蔵用エバポレータを介装した冷蔵回路を前記
冷房用エバポレータと並列に接続し、これらエバポレー
タの各冷媒供給路に電磁弁を開閉可能に配設し、かつこ
れら電磁弁をタイマによって交互に開閉させ、冷房運転
と冷蔵運転を交互に行なうようにし、デフロスト・サー
モスイッチにより冷媒圧縮機の運転休止を行なうように
した車両用冷房・冷蔵制御システムにおいて、デフロス
ト・サーモスイッチによる凍結限界温度検出時に電磁弁
の現状の開閉モードを解除して、冷蔵側の電磁弁を優先
的に開弁し冷蔵運転を優先させる一方、前記温度検出後
は両電磁弁を交互に間欠的に開弁させて冷蔵運転と冷房
運転を交互に行なわせ、かつ前記温度検出後デフロスト
・サーモスイッチが非凍結温度を検出するまでの冷蔵運
転停止時に、冷媒圧縮機の駆動を停止させるようにした
ことを特徴とする車両用冷房・冷蔵制御システム。(2) A refrigeration circuit equipped with a refrigerant evaporator is connected to a cooling circuit equipped with a refrigerant compressor and a cooling evaporator in parallel with the cooling evaporator, and a solenoid valve is opened and closed in each refrigerant supply path of these evaporators. In this vehicle cooling system, the solenoid valves are alternately opened and closed by a timer to perform cooling operation and refrigeration operation alternately, and the refrigerant compressor is stopped by a defrost thermoswitch. In a refrigeration control system, when the defrost/thermo switch detects the freezing limit temperature, the current open/close mode of the solenoid valve is canceled and the solenoid valve on the refrigeration side is opened preferentially to give priority to refrigeration operation. The solenoid valves are opened intermittently to perform refrigerating operation and cooling operation alternately, and when the refrigerating operation is stopped until the defrost thermoswitch detects a non-freezing temperature after the temperature is detected, refrigerant compression is performed. A vehicle cooling/refrigeration control system characterized by stopping the drive of the machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61124993A JPH0712779B2 (en) | 1986-05-30 | 1986-05-30 | Vehicle cooling / refrigeration control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61124993A JPH0712779B2 (en) | 1986-05-30 | 1986-05-30 | Vehicle cooling / refrigeration control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62283016A true JPS62283016A (en) | 1987-12-08 |
| JPH0712779B2 JPH0712779B2 (en) | 1995-02-15 |
Family
ID=14899246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61124993A Expired - Lifetime JPH0712779B2 (en) | 1986-05-30 | 1986-05-30 | Vehicle cooling / refrigeration control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712779B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007083876A (en) * | 2005-09-22 | 2007-04-05 | Mitsubishi Heavy Ind Ltd | Air-conditioner having cold accumulator |
| WO2021095338A1 (en) * | 2019-11-11 | 2021-05-20 | 株式会社デンソー | Refrigeration cycle device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093870U (en) * | 1983-11-30 | 1985-06-26 | 株式会社ボッシュオートモーティブ システム | Control equipment for automotive cooling and refrigeration equipment |
-
1986
- 1986-05-30 JP JP61124993A patent/JPH0712779B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093870U (en) * | 1983-11-30 | 1985-06-26 | 株式会社ボッシュオートモーティブ システム | Control equipment for automotive cooling and refrigeration equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007083876A (en) * | 2005-09-22 | 2007-04-05 | Mitsubishi Heavy Ind Ltd | Air-conditioner having cold accumulator |
| WO2021095338A1 (en) * | 2019-11-11 | 2021-05-20 | 株式会社デンソー | Refrigeration cycle device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0712779B2 (en) | 1995-02-15 |
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