JPH0367977A - Container with cold heat storage type refrigerating unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a refrigerating container equipped with a refrigerant refrigerating unit.

Among them, the cold storage type refrigeration unit uses a cooling fan to cool the inside of the container body, and also relates to a container that can be used by setting the temperature inside the body to two or more temperature ranges. .

(Prior art) Conventional regenerator refrigeration Unisoto combines one or more coolers with one condensing unit, and the coolers that cool the same room are equipped with regenerators with the same freezing temperature. It has built-in material. There are two types of indoor cooling: natural convection and cooling fan.

(Problems to be Solved by the Invention) In the case of a cold storage type refrigeration unit, the indoor air temperature to be cooled is almost determined by the melting temperature (freezing temperature) of the cold storage material.

For cooling to medium temperature, use a medium-temperature cold storage material with a relatively high melting and freezing temperature, and for cooling to low temperature, use a low-temperature cold storage material with a relatively low salinity. So,
Unlike mechanical models, it was not possible to freely select the indoor cooling temperature.

In some cases, containers were designated for use at medium or low temperatures, which was inconvenient.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes an insulating box-shaped main body, a cooler provided on the side wall surface inside the main body, and a cooler provided outside the main body. A condensing unit driven by an external power supply, and a cooling fan that is driven by a battery and blows air cooled by the cooler into the main body. Each cooler has a built-in cold storage material with a different freezing temperature, and is isolated and enclosed from the inside of the main body by an insulating partition wall to form a plurality of air cooling chambers. For each of the air cooling chambers, an air inlet and an air outlet to the inside of the main body were provided at the top of the partition wall. The air inlet is located in the second part of the cooler, the air outlet is located at the top side of the cooler, and a cooling fan is attached to the air outlet.

The air that enters from the air inlet descends while being cooled on the surface of the cooler, is then sucked up by a cooling fan from bottom to top through a side passage, and is blown out from the air outlet.

(Operation) Relatively warm air at the top of the main unit enters the air cooling chamber from the air inlet at the top, is cooled by the cooler, becomes heavier, and descends.

However, since there is no air outlet at the bottom of the air cooling chamber, unless the cooling fan rotates, the cooled air will only accumulate at the bottom of the air cooling chamber and will not blow out into the main body.

Further, the air cooling chamber is separated from the inside of the main body by a heat-insulating partition wall. Therefore, in order to cool the air inside the main unit, it is necessary to rotate a cooling fan, and by selectively operating the cooling fan in the air cooling chamber, which has cold storage materials with different freezing temperatures, it is possible to select between multiple operating temperature ranges. You will be able to choose.

In addition to this, you can also control the internal temperature of the device by turning on and off the cooling fan using the temperature switch.

(Example) FIG. 1 shows an example implemented in a cold roll box box, which is one of the containers. 1 is a box-shaped body made of a heat insulating material.

2 has 4 casters, which are useful for moving the cold roll boxes by hand. 3 is a condensing unit storage box attached to the outer lower surface of the box-shaped main body 1,
Although not shown, there is a condensing unit 4 consisting of a compressor, a condenser, a receiver tank, etc., a battery 5 that serves as a power source for rotating the cooling fan during transportation,
During cold storage operation, an external power source (
It has a built-in charger 6 for charging with an AC power supply, an electric controller section 7, and a power cord storage section for storing power cords that are not used during transportation. Reference numeral 8 denotes a power outlet provided on the front side of the condensing unit storage box 3, and the condensing unit 4 is driven by connecting it to an external AC power source through a power cord.

9.10 are coolers for low temperature and medium temperature, respectively,
Normally, a thin plate-shaped refrigeration plate is used, as shown in the figure, to increase the heat transfer area to the air and to save space.

The refrigeration plates 9 and IO are installed side by side on the 2nd side of the inner rear wall of the box-shaped main body 1 at a position slightly lower than the ceiling and a little apart from the wall surface. Although not shown, the freezing plates 9 and IO each incorporate an evaporator 11, 12 and a cold storage material.

The low-temperature freezing plate 9 keeps the internal temperature of the main body below about -15°C, and contains a cold storage material with a freezing temperature of about -25 to -30°C. The medium-temperature freezing plate 10 keeps the internal temperature at approximately \10°C to -2°C, and the freezing temperature is -10°C.
It has built-in cold storage material.

Reference numeral 13 denotes an insulating partition wall, which encloses the freezing plates vertically from the ceiling to the floor along the wall, shielding them from the inside of the box-shaped body, and completely partitions between the freezing plates 9 and 10. Air cooling chambers 14 and 15 each having a freezing plate were constructed. The inside of this air cooling chamber 14.15 is divided by a vertical guide plate 18.19 into a passageway 16.17 where the freezing plate is located and a passageway 16.17 that sucks the cooled air upward, which are connected at the bottom. .

At the top of the partition plate 13, air populations 2o and 21 and air outlets 22 and 23 are provided, each of which is located at a higher position than the freezing plate. The air inlet 20.21 is provided at the top of the chamber containing the freezing plate, and the air outlet 22.23 is provided at the top of the passage 16.17, opening into the interior of the main body.

A cooling fan 24.25 is attached to the air outlet 22.23 to send cool air into the interior of the main body.

The air inside the box-shaped body enters the air cooling chamber from the air supply, is cooled by the freezing plate, becomes moldy, and then descends.
At the bottom, it is sucked up by the cooling fan and the passage 16
or 17 and is sent out again into the box-shaped body from the air outlet. If the cooling fan 24 or 25 does not operate, the air cooled by the freezing plate is heavy and remains trapped inside the air cooling chamber, and the air that has been cooled by the freezing plate remains trapped inside the air cooling chamber, and the air from the air inlet and air outlet located at a higher position than the freezing plate is removed from the box-shaped body. It never goes inside.

There is a door 26 on the front of the box-shaped main body 1, which can only be opened, closed, and loaded/unloaded. 27 is a handle for opening and closing the door 26.

This cold roll box has a cooling operation after cold storage.
It has a structure that allows cooling to three temperature zones. That is, the temperature inside the box-shaped main body can be set to either 5°C or Q'C1-18°C.

The electrical circuit (DC system) for the cooling operation is shown in Figure 2.

Reference numeral 6 denotes a charger, which charges the buffer battery 5 when a power cord is connected and cold storage operation is performed using an external AC power source.

30.31.32 is a changeover switch, 34.35.36 is a temperature switch, 37.38.39 is an operation confirmation lamp,
Each corresponds to a cold storage temperature of 5°C, 0°C, and -18°C.

25 is a cooling fan for medium temperature, and 24 is a cooling fan for low temperature. The temperature switch has a temperature-sensing part installed at an appropriate position inside the box-shaped main body, which senses the air temperature inside the box-shaped main body, and when the temperature drops to a predetermined temperature, stops the operation of the fan and turns it on and off. Do this.

The freezing plate and cooling fan for medium temperature should be kept at 5℃ or 0℃. It will be used when you want to set it to 0℃.

With the above circuit, by turning on any of the switches 30, 31, and 32, the cooling temperature inside the box-shaped body can be set to 5℃,
It becomes possible to select and set the temperature to either 0°C or -18°C.

(Effects of the Invention) According to the present invention, it is possible to set and use cooling temperatures in two or more temperature ranges using a regenerator refrigeration unit.

Freezing plates with different freezing and thawing temperatures are used to store cold at the same time.
The cooling temperature range can be selected by selecting a switch just before starting the cooling operation.

No mechanical switching structure other than switch selection is required, and no troublesome actions are required from the user.

[Brief explanation of drawings]

Figure 1 is a three-view diagram of a cold roll box that embodies the present invention ((a) is a top view, (b) is a front view, and (c) is a side view), and Figure 2 is an electrical diagram of its cooling operation. It is a circuit diagram. −・−Box-shaped body of the container, 11−−−−−−−−−−−−−−Condensing unit storage box, ・−・・−・−Cooler (low temperature freezing plate)−
Cooler (medium temperature freezing plate) ---Partition wall, 21--------1 air population, 23--air outlet, 25---1111 cooling fan 0 3--20° 22. 24,

Claims (1)

[Scope of Claims] A heat-insulating box-shaped body, a cooler provided on the side wall inside the body and containing an evaporator through which refrigerant flows and a cool storage material, and a cooler provided outside the body and driven by an external power source. a condensing unit, and a cooling fan that is driven by a battery and blows air cooled by the cooler into the main body,
There are multiple coolers inside the main body, each cooler has a built-in cold storage material with a different freezing temperature, and is separated and enclosed from the inside of the main body with an insulating partition wall to form multiple air cooling chambers. For each, an air inlet is provided on the upper side of the cooler at the top of the partition wall, and an air outlet with said cooling fan is provided on the top of the partition wall, laterally removed from the freezing plate, so that the air cooling indoor air is directed over the cooler surface. A container with a regenerative refrigeration unit characterized by having a structure in which the flow flows from the top to the bottom, then makes a U-turn and flows from the bottom to the top.