JPH0522408Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a vehicle refrigerator installed in a vehicle interior, and in particular, when the amount of heat absorbed by the refrigerator becomes excessive, This invention relates to a vehicle refrigerator that can utilize wind as a spot air conditioner.

(Conventional technology) Recently, one-box cars are equipped with Cool Box, which is a vehicle refrigerator that easily cools stored soft drinks, canned coffee, etc. using the air conditioner installed in the vehicle. has been done.

Examples of such cool boxes include those shown in Japanese Utility Model Publication No. 58-179211 and Japanese Utility Model Application Publication No. 56-158342. FIG. 5 shows a cooling circuit that cools the inside of such a cool box, and a compressor 1 that compresses the refrigerant circulating in this cooling circuit has a main condenser 2 and a , an air conditioning evaporator 4, and a cool box evaporator 3 that cools the inside of the cool box are connected to each other. The liquid tank 5 also has a sub capacitor 6 connected to the main capacitor 2.
An air conditioning evaporator 4 and a cool box evaporator 3 are connected to each other.

And this evaporator 3 for cool box
An amount of refrigerant corresponding to the rotational speed of the compressor 1 flows into the evaporator 1, and the heat exchange action of the cool box evaporator 3 cools the inside of the cool box installed in the passenger compartment. There is.

(Problem to be solved by the invention) However, in such conventional vehicle refrigerators, the amount of refrigerant flowing into the cool box evaporator 3 is proportional to the rotation speed of the compressor 1. As shown in the graph in Figure 6,
In other words, as the vehicle speed increases,
As the rotational speed of the compressor 1 increases, the amount of absorbed heat increases, and the final temperature within the cool box decreases. Therefore, especially if the vehicle is driven at high speed for a long period of time, the vehicle may become overcooled.

The present invention was developed in view of the problems of the conventional technology, and when the inside of the cool box becomes supercooled, this cooling air is used for spot air conditioning to cool down the inside of the cool box. It is an object of the present invention to provide a refrigerator for a vehicle that can stabilize the temperature and improve the comfort of air conditioning.

[Configuration of the Invention] (Means for solving the problem) In order to achieve the above object, the present invention provides a vehicle refrigerator having an evaporator inside a box that cools and keeps warm items stored inside, the box having an air intake for taking in air and an air outlet for blowing air out at the feet of occupants, with doors provided for opening and closing the air intake and air outlet, a temperature sensor for detecting the temperature inside the box being attached, an actuator for driving these is connected to the door, and a control circuit for operating the actuator when the temperature detected by the temperature sensor is below a predetermined value is connected to the temperature sensor and the actuator, respectively.

(Function) By configuring in this way, the control circuit can:
When the temperature inside the cool box detected by the temperature sensor falls below a predetermined value, the actuator is operated to open the door provided in the cool box.
As a result, the supercooled cold air inside the Cool Box is blown out to the outside, and the temperature inside the Cool Box is kept almost constant.
Spot wind is blown out under the feet of the passengers, providing comfortable air conditioning.

(Example) An example of the present invention will be described below in detail based on the drawings.

FIG. 1 shows a schematic configuration diagram of a vehicle refrigerator according to an embodiment of the present invention.

The box 10 is provided with an air intake 10 that takes in air, and air outlets 12 and 13 that blow air out to the feet of the passenger. Doors 11a, 12a and 1 that open and close these openings
3a are provided respectively. An actuator 14 is connected to these doors 11a, 12a, and 13a via a link mechanism (not shown). A control circuit 16 is connected to the actuator 14 to control its operation based on the temperature detected by a temperature sensor 15 disposed inside the box 10 to detect the temperature inside the box 10.

FIG. 2 shows a top view of the box 10. As shown in the figure, a cool box evaporator 3 is arranged as shown in the box 10 in which the youth etc. 20 are stored.
Air within the box 10 is circulated by a circulation fan 17.

The vehicle refrigerator configured as described above is attached to a center console 18 in a vehicle interior, for example, as shown in FIG.

This vehicle refrigerator operates as follows according to the operation flowchart shown in FIG. This operation will be explained with reference to FIGS. 1 to 3.

The control circuit 16 first determines whether or not it is automatic control. Here, what is auto control?
Each door 11a, 12 is such that spot air is automatically supplied to the occupants when the temperature detected by the temperature sensor 15 provided in the box 10 is below a predetermined temperature.
a, the mode for opening 13a (step 1).
In the case of automatic control, the temperature T in the box 10 is detected by the temperature sensor 15 (step 2),
If this detected value T is larger than the set temperature TA,
The control circuit 16 closes each door 11a, 12a, 13a without operating the actuator 14 (step 4), so that it can be used like a normal cooler box. On the other hand, if this detected value T is smaller than the set temperature TA, the control circuit 16 operates the actuator 14 to open each door 11a, 12a, 13a, supply spot air to the feet of the passenger, and open the box. 10
control so that the temperature inside approaches the set temperature TA (step 5). Note that step 4 is the same as step 1.
This process is also performed when it is determined that automatic control is not used.

Therefore, if the temperature inside the box 10 drops too much, this excess cooling air can be effectively used as spot air for the passengers, and the temperature of the stored items is also kept at a nearly constant value. , the effective use of cool boxes becomes possible.

[Effects of the invention] As is clear from the above explanation, according to the invention, when the amount of absorbed heat in the refrigerator installed in the vehicle becomes excessive, the door is opened, so that the refrigerator installed in the vehicle is not stored in the refrigerator. It can be effectively used as a spot air conditioner that maintains the temperature of stored items at an appropriate temperature and supplies surplus cold air to the feet of passengers.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a vehicle refrigerator according to an embodiment of the present invention, FIG. 2 is a top view of the vehicle refrigerator shown in FIG. 1, and FIG. 3 is a diagram of the vehicle refrigerator shown in FIG. 1. Figure 4 is an operational flowchart of the vehicle refrigerator shown in Figure 1, Figure 5 is a cooling circuit diagram of a typical cooler box, and Figure 6 is a diagram of a conventional cooler. 3 is a graph showing the relationship between box internal temperature and vehicle speed. 10... Box, 11... Air intake, 11
a, 12a, 13a...door, 12, 13...air outlet, 14...actuator, 15...temperature sensor, 16...control circuit, 20...stored item.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle refrigerator that has an evaporator 3 in a box 10 to cool and keep warm stored items 20 inside, the box 10 has an air intake port 11 that takes in air, and an air intake port 11 at the passenger's feet. Doors 11a, 12a, and 13a are provided to form air outlets 12 and 13 for blowing out air, and to open and close these air intake ports 11 and air outlets 12 and 13, respectively,
A temperature sensor 15 is installed in the box 10 to detect the temperature inside the box 10, and the doors 11a, 1
An actuator 14 for driving these is connected to 2a and 13a, and a control circuit 16 for operating the actuator 14 when the temperature detected by the temperature sensor 15 is below a predetermined value is connected to the temperature sensor 15 and the actuator 14, respectively. A vehicle refrigerator characterized by: