JPH0424384Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an automobile refrigerator installed in the interior of an automobile.

(Prior art) Some automotive refrigerators are of the trunk compartment type, which cools food etc. only until the destination is reached, and is removed from the vehicle and used after reaching the destination. -Refer to No. 108055).

However, this refrigerator does not take into account the reduction of the sealed brine and is designed to separate a part of the cooling cycle, so there is a risk of refrigerant leakage and the task of installing and removing the refrigerator may be troublesome. There is.

Therefore, in recent years, automobile air conditioners have been developed that store surplus cooling power during normal driving and use this stored cooling power when the vehicle is stopped (for example, Japanese Patent Laid-Open No. 61-27467 (see official bulletin). This automotive air conditioner uses the surplus cooling power to cool water and the like using a sub-evaporator, and uses this water to cool objects.

It will be explained in further detail.

An example of the cooling cycle of this automobile air conditioner is shown in FIG. 3. When performing normal cooling operation with this automotive air conditioner, solenoid valves A and C are closed and only solenoid valve B is opened. In this case, the refrigerant discharged from the compressor 1 is transferred from the condenser 2 to the liquid tank 3 to
The flow is solenoid valve B → expansion valve 4 → evaporator 5 → compressor 1.

In the case of cold storage operation, solenoid valves A and B are closed and only solenoid valve C is opened. In this case, the refrigerant flows in the order of compressor 1 → condenser 2 → liquid tank 3 → cold storage expansion valve 6 → regenerator 7 → solenoid valve C. In the figure, "8" is a check valve, and "9" is a heat-sensitive tube.

When the refrigerant is flowed in this order, the water injected into the outer circumference of the regenerator 7 is cooled and becomes ice. This ice is used to cool various items, and the regenerator 7 is usually installed in an easily accessible location such as a console box between the front seats, as shown in FIG. In some cases, it may be in contact with the lower part of the instrument panel or the inside of the trunk (shown by broken lines).

As shown in FIGS. 5 and 6, the structure of this regenerator 7 consists of a casing 10 with a U-shaped cross section closed by a lid 10a (outer plate 11 made of resin, inner plate 12 made of aluminum, A heat insulating material 13 provided with
The inside of the refrigerator is divided into upper and lower parts by aluminum partition plates 14, with the upper part serving as a refrigerating compartment 15 for storing things that need to be cooled, such as juices, and the lower part serving as a cold storage compartment 16.

This cold storage chamber 16 has a heat exchanger 17 installed therein, and the cold storage water W injected from the inlet is transferred to the heat exchanger 1.
7 for cooling.

This regenerator 7 freezes the regenerated water W into ice using the cold power left over during normal driving, and uses this ice to cool the inside of the refrigerating compartment 15 via the partition plate 14.

(Problem to be solved by the invention) When the cold storage water W in the cold storage chamber 7 freezes, the volume changes. I'm trying to locate it.

However, if the water level is lowered and a large air layer is created between the water level and the partition plate 14, this air layer may impede the heat transfer effect and reduce the cooling capacity.

In other words, this water level adjustment is a troublesome work, and it is difficult to reliably inject the desired amount of water.

In addition, since this regenerator 7 does not allow water to be taken out or taken out, it usually has a sealed structure, but if it has such a hermetically sealed structure, it will be possible to prevent the water in the regenerator 7 from decreasing for some reason. In this case, the entire regenerator 7 would have to be replaced with a new one.

However, if the regenerator 7 can be replenished with water, so-called serviceability will be improved, and it will also be advantageous in terms of cost.

This invention was developed to solve the above-mentioned drawbacks and problems associated with the conventional technology, and aims to simplify and speed up the water injection work during manufacturing, making it easy to replenish water when it decreases. The purpose of the present invention is to provide a refrigerator for automobiles that can perform the following functions.

[Structure of the invention] (Means for solving the problem) In order to achieve the above object, the present invention divides the inside of the casing into a refrigerator compartment and a cold storage compartment by a partition plate, and a heat exchanger is installed in the cold storage compartment. In the automobile refrigerator which cools the cold storage water injected into the cold storage chamber, a bulge projecting upward is formed in a part of the partition plate, and this bulge is placed at the top of the bulge. It is characterized by providing an overflow mechanism having a communication pipe that communicates the bulging portion with the outside, and an on-off valve that can open and close the communication pipe from the refrigerator compartment side.

(Function) Therefore, if the on-off valve is opened when cold storage water is injected, the cold storage water will not exceed the predetermined amount, and even if the cold storage water decreases due to long-term use of this regenerator, it will not open or close. Water can be refilled immediately by opening the valve.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention, and the same members as those shown in FIGS. 3 to 6 are designated by the same reference numerals.

In this automobile refrigerator 20, the interior of the casing 10 is partitioned into a cold storage chamber 15 and a cold storage chamber 16 by a partition plate 14, and the cold storage chamber 16 is further divided into a water injection chamber 16a and a valve chamber 16b by a partition wall 29a.

A heat exchanger 17 is provided in the water injection chamber 16a, and a cold storage expansion valve 6 and a solenoid valve for controlling refrigerant to the heat exchanger 17 are provided in the valve chamber 16b.

The header pipes 22a and 22b, which are the inlet and outlet pipes of the heat exchanger 17, are connected with the ends of meandering irregularly shaped pipes that constitute the core of the heat exchanger 17, as well as conduits for the cooling cycle system. .

In particular, in this embodiment, a bulge 21 that protrudes upward is formed in a part of the partition plate 14, and an overflow mechanism 22 is provided at the top of the bulge 21.

This bulging portion 21 is formed by protruding the end portion of the partition plate 14 upward in the shape of a chimney.
As shown in detail in FIG. 2, the overflow mechanism 22 provided at the top includes a communication pipe 23 that communicates between the inside of the bulge 21 and the outside, and a communication pipe 23 that opens and closes the communication pipe 23 from the refrigerator compartment 15 side. It has an on-off valve 24 for obtaining.

The on-off valve 24 has a valve box 25 provided at the inner end of the communication pipe 23, and a valve body 26 made of an O-ring pipe is installed inside the valve box 25. It is constructed so that opening and closing can be controlled from the side using a valve rod 27. This valve rod 27 has a male threaded portion 27a, and this male threaded portion 27a is adapted to be screwed into a weld nut 28.

Moreover, an antibacterial agent is applied to the side wall 29 of the water injection chamber 16a to prevent the growth of mold and the propagation of sterilization during long-term use. When applying this antibacterial agent, a predetermined synthetic resin or an inorganic material such as water glass is used as a binder on the wall surface of the side wall 29.

Note that an antibacterial agent may be mixed into the cold storage water W. In this case, since the antibacterial agent is effective in a small amount, there is no risk of impairing the properties of the cold storage water W.

Next, the action will be explained.

First, in the process of manufacturing this refrigerator 20, after forming the cold storage chamber 16, this cold storage chamber 16 is
Inject water inside. At the time of this injection, the valve stem 27 of the on-off valve 24 is removed from the valve box 25, and the communicating pipe 23 is
The outside of is in communication state.

After removing the valve body 24, the water is injected through the opening created until it reaches the set water level SL shown by the broken line in FIG.
In this case, if the amount of water injected is too large, unnecessary water will be discharged to the outside through the communication pipe 23, so that the water level will not exceed a certain level SL.

When the water level reaches this certain level, the valve stem 27 is inserted through the opening and the threaded part 2 is inserted into the weld nut 28.
7a is screwed together, the valve body 26 such as an O-ring provided at the tip of the valve stem 27 comes into contact with the inner peripheral surface of the valve box 25,
The communication pipe 23 will be closed.

If this is assembled into the casing 10, an automobile refrigerator 20 will be obtained.

Next, when performing cold storage operation, it is sufficient to close solenoid valves A and B and open solenoid valve C in FIG. cooled and frozen.

During this cooling, since the bulging portion 21 protrudes into the refrigerator compartment 15, the object to be cooled P is cooled from the circumferential surface, and an increase in cooling power can be expected. Due to the presence of air space,
By providing a through hole 29 in the valve stem 27, volumetric expansion during freezing can be absorbed.

Conversely, when solenoid valves B and C are closed and only A is opened, relatively high temperature refrigerant flows into the heat exchanger 17, resulting in defrost operation. This causes the ice to melt and turn into water.

[Effects of the invention] As described above, according to the invention, water can be easily poured into the cold storage chamber, and when the cold storage water decreases, water can be easily replenished by taking out the valve stem.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, FIG. 3 is a circuit diagram of a conventional automobile refrigerator, and FIG. Figure 5 is a schematic diagram showing the installation location of the automobile refrigerator.
Figure 6 is a perspective view of the main parts of the automotive refrigerator.
It is a longitudinal section equivalent view of the figure. 10...Casing, 14...Partition plate, 15...
...Refrigerating room, 16... Cold storage room, 17... Heat exchanger,
21...Bulging part, 23...Communication pipe, 24...Opening/closing valve, 25...Valve box, 26...Valve body, W...Cold storage water.

Claims (1)

[Claims for Utility Model Registration] 1. The inside of the casing 10 is partitioned into a cold storage chamber 15 and a cold storage chamber 16 by a partition plate 14, and cold storage water is injected into the cold storage chamber 16 by a heat exchanger 17 installed in the cold storage chamber 16. In the automobile refrigerator configured to cool W, a bulge 21 that protrudes upward is formed in a part of the partition plate 14, and a bulge 21 is formed at the top of the bulge 21.
a communication pipe 23 that communicates with the outside, and an on-off valve 24 that can open and close this communication pipe 23 from the refrigerator compartment side.
An automobile refrigerator characterized in that an overflow mechanism 22 is provided. 2 The on-off valve 24 includes a valve box 25 provided at the inner end of the communication pipe 23, a valve body 26 installed inside the valve box 25, and a valve body 26 that is connected to the refrigerator compartment 15.
The automobile refrigerator according to claim 1, which has a valve box 25 that can be opened and closed from the side.