JPH0625366Y2 - Vehicle refrigerator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is a control of a vehicle refrigerator in which the function of the vehicle refrigerator is stopped until a predetermined time elapses after the engine is started. Regarding the device.

(Prior Art) In recent years, there is a vehicle in which a refrigerator for cooling canned juice or the like is provided in a vehicle compartment.

Usually, an evaporator connected to a cooling circuit of an air conditioner is provided in a refrigerator of this type. And, in the passage that connects the evaporator and the cooling circuit,
An electromagnetic valve is provided for on / off controlling the inflow of the refrigerant flowing into the evaporator. The temperature inside the refrigerator is adjusted by controlling the operating time of the electromagnetic valve and controlling the refrigerant flowing into the evaporator intermittently.

(Problems to be solved by the invention) However, in such a conventional vehicle refrigerator,
Normally, the solenoid valve continues to operate and supplies the refrigerant to the evaporator in the refrigerator regardless of the heat load of the air conditioner. Therefore, when the heat load of the air conditioner is large, the air conditioning capacity may be insufficient, and it may not be possible to reach the temperature required by the passenger in the passenger compartment.

In order to eliminate such inconvenience, JP-A-60-22
As disclosed in Japanese Patent No. 9,817, there is disclosed a technique of temporarily stopping the function of the refrigerator when the temperature inside the vehicle compartment is high, that is, when the heat load of the air conditioner is large. However, the control device of the refrigerator to which such a technique is applied has a disadvantage that the cost is high because the structure is complicated and the number of parts used is large.

The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a control device for a vehicle refrigerator having a simple structure.

[Structure of the Invention] (Means for Solving the Problems) The present invention for achieving the above-mentioned object is to provide a part of the refrigerant supplied from the cooling circuit of the air conditioner in a refrigerator provided in the vehicle interior. In a vehicular refrigerator adapted to flow into an evaporator, an ignition switch for starting an engine of the vehicle, a valve for controlling the inflow of refrigerant into the evaporator, and an operation of the valve for a predetermined time after the ignition switch is turned on. Therefore, a control means for preventing the refrigerant from flowing into the evaporator is provided.

(Operation) With this configuration, as shown in FIG.
When the ignition switch 12 is turned on and the activation of the engine is confirmed by the control means 11, the control means operates the valve 10 until the predetermined time elapses from the activation, so that the refrigerant flows into the evaporator 6 for the refrigerator. Shut off. Therefore, the air-conditioning capacity is improved while the valve 10 is operating, which is particularly effective when, for example, the vehicle interior of a vehicle parked under the scorching sun in midsummer is rapidly cooled.

(Embodiment) An embodiment of a control device for a vehicle refrigerator according to the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic configuration diagram of a control device for a refrigerator including a cooling circuit of an air conditioner according to the present invention.

An air conditioner evaporator 5 and an evaporator 6 provided in a refrigerator are connected to a compressor 1 driven by an engine (not shown) via a main condenser 2, a sub condenser 3 and a liquid tank 4.
A closed circuit is formed. A solenoid valve 8 that connects and disconnects the refrigerant flowing into the evaporator 5 is provided in a passage 7 that connects the liquid tank 4 and the evaporator 5, and an evaporator 6 is provided in a passage 9 that connects the liquid tank 4 and the evaporator 6. A solenoid valve 10 for connecting and disconnecting the refrigerant flowing in is provided, and when these solenoid valves 8 and 10 are opened, the refrigerant flows through the evaporators 6 and 6 as indicated by arrows in the figure,
It cools the air in the passenger compartment as well as the air in the refrigerator.

A control circuit 11 for individually controlling the operation of the solenoid valves 8 and 10 is connected to the solenoid valves 8 and 10, and an ignition switch 12 is connected to the control circuit 11. Turn on this ignition switch
The control circuit 11 controls the operation of the solenoid valves 8 and 10 by the off signal.

FIG. 3 shows a block diagram of an apparatus relating to the control of the solenoid valves 8 and 10 shown in FIG.

In the control circuit 11, the ignition switch is turned on.
A detection circuit 13 for detecting off, a cancel timer 14 for starting time counting after the detection circuit 13 outputs a signal of an on state of the ignition switch 12, and outputting a cancel signal until a predetermined time is passed, for an air conditioner A switching circuit 15 for switching the operation of the solenoid valve 8 for controlling the inflow of the refrigerant to the evaporator 5 and the solenoid valve 10 for controlling the inflow of the refrigerant to the evaporator 6 provided in the refrigerator, and the operating time of the solenoid valves 8 and 10. And a switching timer 16 which outputs a switching signal for alternately switching the solenoid valves 8 and 10 to the switching circuit 15.

Then, the control circuit configured as described above operates as in the operation flowchart shown in FIG. This operation will be described below.

First, the detection circuit 13 determines whether or not the ignition switch 12 is turned on, and when it recognizes that the ignition switch 12 is turned on, the cancel timer 1
4 is activated (step 1). Cancel timer 1
The switching circuit 15 receiving the cancel signal from 4 closes the solenoid valve 10 to block the inflow of the refrigerant into the evaporator 6 (step 2). The cancel timer 14 determines whether or not a predetermined time (for example, about 5 minutes) has elapsed after the ignition switch 12 was turned on, and if the predetermined time has not elapsed, processes the operation of step 2, and when the predetermined time elapses, cancels. The timer 14 stops the output of the cancel signal (step 3). Then, the switching circuit 15 in which the cancel signal is no longer input alternately controls the operations of the solenoid valves 8 and 10 at predetermined time intervals by the switching timer 16 to operate the air conditioner together with the refrigerator (step 4).

As described above, in this embodiment, the ignition switch 1
After 2 is turned on, the function of the refrigerator is forcibly stopped until a predetermined time elapses, and the air conditioning capacity during this period is improved. Further, since the ON signal of the ignition switch 12 is used as a start signal for stopping the function of the refrigerator, a special part for issuing this start signal is unnecessary. In a refrigerator for a vehicle, it usually takes about one hour to cool the internal components of the refrigerator, so even if the function is stopped for a few minutes at the initial stage of startup, there is almost no practical problem. There is no.

Although two solenoid valves 8 and 10 are used in the present embodiment, the evaporator for the refrigerator has a higher flow resistance than the evaporator for air conditioning, and therefore only the evaporator flow passage for air conditioning is electromagnetically connected. It is possible to prevent the refrigerant from flowing into the evaporator for the refrigerator simply by providing the valve and opening and closing the valve.

[Effects of the Invention] As is clear from the above description, according to the present invention, the function of the refrigerator is stopped until a predetermined time elapses after the ignition switch is turned on. In the case of rapid cooling, it is possible to provide a control device for a vehicle refrigerator, which has improved cooling capacity, a simple control device configuration, a small number of parts used, and a low cost.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device for a vehicle refrigerator according to the present invention, FIG. 2 is a schematic configuration diagram of a cooling and control system of a vehicle refrigerator according to the present invention, and FIG. 3 is a vehicle refrigerator according to the present invention. FIG. 4 is a schematic configuration diagram of the control device of FIG. 4, and FIG. 4 is an operation flowchart of the control device shown in FIG. 6 ... Evaporator in refrigerator, 12 ... Ignition switch, 10 ... Electromagnetic valve (valve), 11 ... Control circuit (control means).

Claims (1)

[Scope of utility model registration request] 1. A vehicle refrigerator in which a part of the refrigerant supplied from a cooling circuit of an air conditioner is made to flow into a refrigerator evaporator (6) provided in a vehicle compartment,
Ignition switch (1 to start the engine of the vehicle
2), the valve (10) for controlling the inflow of the refrigerant into the evaporator (6), and the valve (10) for a predetermined time after the ignition switch (12) is turned on.
And a control means (11) for preventing the refrigerant from flowing into the evaporator (6).