JPH0533895Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cold storage type refrigerator in which an article storage space formed inside an insulated warehouse is kept cool by a cold storage element.

[Conventional technology] As a conventional cold storage type refrigerator, a removable cold storage element is arranged in the upper part of the inside of the insulation box, in which the opening on the side of the insulation box can be opened and closed with an insulation door, and the refrigerator is cooled by the cold storage element. Some devices are designed to cool down articles in an article storage space by falling cold air. The cold storage element stores cold as needed. Casters are also provided on the bottom of the insulation box.

This has the advantage that it has a simple structure and can suppress the temperature rise in the article storage space even in a place without a power source. Therefore, it is particularly advantageous when transported by automobile or the like.

[Problems to be solved by the invention] However, since the temperature of the article storage space cannot be controlled, the following problems arise. For example, if the cooling temperature is just right in a warm region, the article may become too cold and freeze when transported to a cold region. And in the opposite case,
Items may become too warm to function as a refrigerator. If the item is a perishable food item, freezing or increasing the temperature of the item is not allowed.

In addition, the cold storage agent used in the cold storage element generally has a constant temperature, so it only generates cold air at a constant temperature. Therefore, the temperature inside the refrigerator changes due to fluctuations in outside temperature, making it impossible to maintain a constant temperature. There were flaws.

Therefore, an object of the present invention is to provide a cold storage type refrigerator that can control the temperature of an article storage space according to the outside temperature.

[Means for Solving the Problems] According to the present invention, a heat insulating box forming an article storage space, casters on the lower surface of the heat insulating box, and a heat insulating door that can open and close an opening formed on a side surface of the heat insulating box, A cold storage type refrigerator including a cold storage element disposed on the inner upper part of the heat insulating box, a dish member disposed on the inner upper part of the heat insulating box and having a recess for receiving the cold storage element; a frame member disposed opposite to each other and having the dish member at its upper end; a drainboard disposed at the inner bottom of the insulating box; air can be circulated between the low-temperature space in the recess and the article storage space; a blower, a heater disposed in at least one of a gap between the frame member and the inner surface and a gap between the drainboard and the inner bottom;
a rechargeable battery connected to the blower and the heater; a first control device that controls the drive of the blower and the heater according to the outside temperature; and a first control device that controls the drive of the blower and the heater according to the temperature of the article storage space. A regenerator refrigerator characterized in that it is equipped with a second control device that performs control according to the following.

[Function] In the cold storage type refrigerator of the present invention, when the blower is driven, cold air cooled by the cold storage element flows out from the recess of the dish member into the article storage space. When the blower is stopped, the cold air remains in the recessed portion of the dish member and does not substantially flow upstream into the article storage space. When the heater is driven, the temperature of the article storage space increases. When the drive of the heater is stopped, the temperature of the article storage space decreases. The drive of these blowers and heaters is controlled by first and second control devices according to the outside temperature and the temperature of the article storage space. Note that power to the blower and heater is supplied from the battery.

[Embodiment] FIG. 1 shows a regenerator refrigerator according to an embodiment of the present invention. This regenerator refrigerator includes a heat insulating box 2 in which an article storage space 1 is formed. The heat insulating box 2 has an opening (not shown) on one side for taking articles in and out of the article storage space. The opening can be opened and closed by a heat insulating door (not shown). The heat insulating box 2 and the heat insulating door are collectively referred to as a heat insulating warehouse. Casters 3 are provided at the four corners of the lower surface of the insulation box 2 to facilitate movement of the insulation box. It goes without saying that the heat insulating box 2 has a structure in which a heat insulating material is provided between the outer box and the inner box.

A drainboard 6 is placed at the inner bottom of the insulated storage.
Further, a frame member 7 is opposed to the inner surface of the heat-insulating storage at a distance. The drainboard 6 and the frame member 7 are used to prevent the articles in the article storage space from coming into contact with the wall surface of the heat-insulating warehouse. In addition, a gap is formed between the drainboard 6 and the inner surface of the insulation box 2 of the frame member 7, and most of the cold air or warm air generated by the plate member 8 or the heater 16, which will be described later, fills this gap. It is designed to pass through.

A plate member 8 is provided at the inner upper part of the heat insulating box 2. The plate member 8 is supported between the upper ends of the frame member 7. As a result, a gap is left between the inner surface of the heat insulating box 2 and the plate member 8, which serves as an inlet 11 and an outlet 12.

A cold storage element 13 and a blower 1 are installed in the recess 9 of the plate member 8.
4 is placed. As the cool storage element 13, a known cool storage material sealed in a suitable package (not shown) can be used. Such a cold storage material 13 is arbitrarily taken out of the refrigerator, cooled and stored outside, and then placed in the recess 9. Note that an evaporator of a refrigeration circuit may be attached to the cool storage element 13 disposed in the recess 9 so that the cool storage element 13 can store cold while being disposed in the recess 9 .

The blower 14 sends cold air from the recess 9 to the outlet 1 when driven.
2 to the article storage space 1. As a result, the air in the article storage space 1 flows into the recess 9 through the inlet 11. Therefore, air circulates between the space within the recess 9 and the article storage space, and is cooled by the cool storage element 13 at this time.

Furthermore, an electric heater 16 is provided between the inner surface of the heat insulating box 2 and the drainboard 6 and frame member 7.
This electric heater 16 and the above-mentioned blower 14 are connected to a rechargeable battery 1 attached to the bottom surface of the insulation box 2.
7 is connected.

FIG. 2 shows an electric circuit for driving the blower 14 and the electric heater 16. In FIG. 2, the battery 17 is charged by a power source 21 via a battery charger 22. In FIG. Battery 1
7 is prevented by an overcharge prevention switch 23. The blower 14 and the electric heater 16 are connected in parallel to each other and to a battery 17 via an outside temperature switch 26. The outside temperature switch 26 operates by sensing the outside temperature, and switches only one of the blower 14 and the electric heater 16 to the battery 1.
7. Specifically, the battery 17 is connected to the blower 14 when the outside temperature is high, and the battery 17 is connected to the electric heater 16 when the outside temperature is low. The outside temperature switch 26 is herein referred to as a first control device.

Internal temperature switches 27 and 28 are connected in series to the blower 14 and the electric heater 16 in one-to-one correspondence. One internal temperature switch 27 closes when the temperature of the article storage space 1 is higher than a predetermined temperature, and opens when the temperature is lower than a predetermined temperature. The other internal temperature switch 28 opens when the temperature of the article storage space 1 is higher than a predetermined temperature, and closes when the temperature is lower than a predetermined temperature. The internal temperature switches 27 and 28 are herein referred to as a second control device.

In the above-mentioned regenerator refrigerator, the outside temperature switch 26 connects the battery 17 to the blower 14 when the outside temperature is high. When the blower 14 is driven, cold air cooled by the cold storage element 13 flows out from the recess 9 of the plate member 8 into the article storage space 1 . Therefore, the articles in the article storage space 1 are cooled and stored.

When the temperature of the article storage space 1 falls below a predetermined temperature, the internal temperature switch 27 opens and the blower 14
drive stops. In this state, the cold air remains in the recess 9 of the plate member 8 and does not substantially flow upstream into the article storage space 1. Therefore, an excessive drop in the temperature of the article storage space 1 is prevented.

On the other hand, when the outside temperature is low, turn on the outside temperature switch 2.
6 connects the battery 17 to the electric heater 16. When the electric heater 16 is driven, a decrease in the temperature of the article storage space 1 is suppressed. Electric heater 16
is controlled by the internal temperature switch 28.

In this way, the drive of the blower 14 and the electric heater 16 is controlled by the first and second control devices according to the outside temperature and the temperature of the article storage space, and thereby the article storage space 1 can be maintained at an appropriate temperature. That's what I do.

[Effects of the invention] As explained above, according to the invention, when the temperature of the article storage space is low, the cold storage heat of the cold storage element can be retained in the concave part of the plate member, so that it is possible to prevent the outside temperature from changing. It is possible to provide a cold storage type refrigerator that can appropriately control the temperature of the article storage space accordingly. What's more, this cold storage refrigerator can keep temperature changes small even in places without power. Therefore, it is particularly suitable for transporting fresh foods between warm and cold regions by transporting them on vehicles. Furthermore, in the present invention, since the frame member and the drainboard are provided in the insulating box, the gap between these and the insulating box is designed to allow cold air generated within the pan member or warm air generated by the heater to pass through. This cold or warm air is used to deal with the heat or cold air that enters from the walls of the insulation box.In other words, since the temperature is controlled near the walls of the insulation box, the inside of the storage space for goods is The temperature inside the warehouse can be controlled without directly cooling or heating the articles, and as a result, the articles can be transported without being damaged.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a cold storage type refrigerator according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an electric circuit for driving the cold storage type refrigerator of FIG. 1. 1... Goods storage space, 2... Heat insulation box, 3... Caster, 8... Plate member, 9... Recess, 13...
Cold storage element, 14...Blower, 16...Heater, 1
7... Battery, 26... Outside temperature switch (first control device), 27, 28... Inside temperature switch (second control device).

Claims (1)

[Scope of utility model registration request] A cold storage device including a heat insulating box forming an article storage space, casters on the bottom surface of the heat insulating box, a heat insulating door formed on the side of the heat insulating box that can open and close an opening, and a cold storage element disposed on the inside upper part of the heat insulating box. In the type refrigerator, the tray member is disposed on the inner upper part of the insulation box and has a recess for receiving the cold storage element, and the tray member is provided at the upper end of the tray member, which is disposed opposite to the inner surface of the insulation box at a distance. a frame member, a drainboard placed on the inner bottom of the heat insulating box, a blower capable of circulating air between the low temperature space in the recess and the article storage space, a gap between the frame member and the inner surface; , a heater disposed in at least one of the gaps between the drainboard and the inner bottom, a rechargeable battery connected to the blower and the heater, and driving the blower and the heater according to the outside temperature. A regenerator refrigerator comprising: a first control device for controlling the air blower and a second control device for controlling the drive of the blower and the heater according to the temperature of the article storage space.