JPH031069A - Container equipped with cold 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 (Industrial Field of Application) The present invention relates to a refrigerated container equipped with a regenerator refrigeration unit.

Among them, the cold storage type refrigeration unit is a natural convection type that does not use a fan, and it is possible to set the internal temperature in two or more temperature ranges in one container.

(Prior art) A conventional regenerator refrigeration unit combines one or more coolers with one condensing unit, and the coolers that cool the same room have the same Φ freezing temperature. a
It has a built-in cold material. In addition, refrigerated containers generally do not have a power source, a separate unit, etc.

(Problems to be Solved by the Invention) A cold storage type refrigeration unit operates a condensing unit to cool and freeze the cold storage material in the cooler, while also cooling the room.

Since a large amount of cold energy is stored in the form of latent heat, even after the condensing unit has stopped operating, the cooler continues to cool the surrounding air for a long time while melting the cold storage material.

Therefore, the natural convection type cold storage type refrigeration unit is particularly suitable as a refrigeration unit for a container or the like that does not have a power source, battery, or the like.

Further, in order to keep the temperature of the air to be cooled constant, a eutectic solution with constant freezing and melting temperatures is usually used as a cold storage material.

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

Use a medium-temperature cold storage material to cool to a medium temperature, use a low-temperature cold storage material to cool to a low temperature, and once you have selected the cold storage material, you can freely choose the indoor cooling temperature like a mechanical method. I couldn't.

In some cases, containers were used exclusively for medium or low temperatures, which was inconvenient.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, a plurality of coolers are attached to the inner wall of an insulating box-shaped body, and each cooler is provided with a cooling device having a different freezing temperature. A cold storage material is built in, and a guide plate separates and encloses it from the inside of the main body, and an air inlet is provided at the top of the guide plate, and an air outlet is provided at the bottom of the guide plate, each forming an air cooling chamber. To selectively open and close an air passage in an air cooling room.

(Function) As shown in Figure 3, the air inside the main body flows into the air cooling chamber from the upper air inlet, is cooled by the cooler, flows downward, and flows out into the main body from the lower air outlet. Air convection occurs, and this convection is promoted by the chimney effect of the guide plate, allowing the cooler to effectively cool the air inside the main body.

Moreover, since the air passage of the air cooling chamber, for example, the air outlet, can be opened and closed, when the air outlet is closed, the convection and cooling of the air inside and outside the air cooling chamber are stopped.

In other words, the air inside the box-shaped body is cooled at the temperature of the cooler with the air outlet open.

It is now possible to select two or more temperature zones and use it for cold storage.

(Example) FIG. 1 shows an example implemented in a cold roll box, which is one of the containers. Figure 1 (a) is a top view;
(b) is a front view, and (C) is a side view. 1 is a box-shaped body made of a heat insulating material. 2 has 4 casters, which are useful for moving the cold roll box with 4 hands.

3 is a condensing unit attached to the outer lower surface of the box-shaped main body l, and contains a compressor, a condenser, a receiver tank, etc. 4.5 are two coolers that are installed side by side on the upper side of the inner side wall of the box-shaped main body 1. Normally, they are made thin as shown in the figure to improve air cooling inside the main body and to save space. A frozen plate shaped into a plate is used. Although not shown, each of the freezing plates 4.5 incorporates an evaporator 6.7 and a cold storage material. The freezing plate 4 is for medium temperature (maintains the temperature inside the main body at approximately 0 to 10°C).

), and has a built-in cold storage material with a freezing temperature of about -10°C. The freezing plate 5 is for low temperature (maintains the temperature inside the main body at about -15°C or lower), and has a freezing temperature of -25 to -30°C.
It has built-in cold storage material. 8 is a guide plate,
The freezing plates are vertically enclosed along the wall surface to be isolated from the inside of the box-shaped body, and the spaces between the freezing plates 4 and 5 are also partitioned. It is preferable to use a heat insulating material for the guide plate 8. Air ports 9, 9 are provided in the upper part of the guide plate 8, and air outlets 10, 10 are provided in the lower part.

Air cooling chambers 11 and 12 were partitioned by guide plates 8 and each contained freezing plates having different freezing temperatures.

Next, the air outlet 10.10 has a door or partition lid that can be opened and closed, although the detailed structure is omitted from the illustration, and the air outlet 10.10 has a door or a partition lid that can be opened and closed, and the cooled air is delivered from the air cooling chamber 11.12 to the inside of the box-shaped body l. You can stop the flow. This air outlet door or partition lid can be configured to be operable from the outside by connecting a string, link, etc. even when a shelf is placed inside the box-shaped main body 1.

There is a handle 113 on the front of the box-shaped main body l, which allows opening and closing and loading and unloading of cargo, and a handle 14 for opening and closing the door 13.

15 is a power outlet provided in the front of the condensing unit 3.

The refrigerant circuit of this cold roll box is constructed as shown in FIG. 2, for example.

Within the condensing unit 3, a motor compressor 16. Condesa 17. Receiver tank 18. The dryer 19 is connected in this order, and the pipe line enters the inside of the box-shaped main body 1 and then splits into two lines. The l path is a solenoid valve 20. The expansion valve 21, the evaporator 6 of the medium-temperature freezing plate 4, and the evaporation pressure adjustment valve 22 are continuous. The other is a solenoid valve 23 and an expansion valve 24. This is followed by the evaporator 7 of the low-temperature freezing plate 5. Thereafter, the two pipes merge and return to the suction port of the motor compressor 16 via the suction pressure regulating valve 25. In this refrigerant circuit, the electromagnetic valves 20 and 23 are attached with their temperature-sensing parts in close contact with the surfaces of the freezing plates 4 and 5, respectively, and when the respective cold storage materials have completed freezing (cool storage on the freezing plates has been completed). It senses the temperature when it enters supercooling and closes the pipe.

Since the freezing temperatures of the freezing plates 4 and 5 are different, the evaporation pressure regulating valve 22 functions to maintain the evaporation pressure of the medium-temperature freezing plate 4 at a higher level.

The suction pressure regulating valve 25 keeps the suction pressure below a certain level so that the motor compressor 16 is not overloaded.

The cold roll box of the present invention configured as described above operates as follows.

When the cold roll box is at the base, the cold storage operation is performed by inserting the power cord into the power outlet 15 and supplying electricity from an external commercial power source. Of the two freezing plates, whichever one completes cold storage and enters supercooling first, the surface temperature of that freezing plate is detected and the solenoid valve (2) of the conduit is activated.
0 or 23) closes to stop further cold storage. During daily recycling operations, cold storage is mainly performed using frozen plates that were melted during the previous cold storage use.

During cold storage operation, either the medium temperature or low temperature air outlet of the air cooling chamber is left open to cool and precool the inside of the box-shaped body.

When selecting settings for medium or low temperature use, normally the air cooling chamber side for medium temperature is opened during cold storage operation, and when the next cold storage use temperature is determined or a little before loading, if medium temperature use is used, the air cooling chamber side is opened. If you want to use the cold roll box at a low temperature, it is best to switch by closing the medium temperature air outlet and opening the low temperature air outlet. The temperature is determined.

After the cold storage operation is completed and during loading and transportation, the inside of the box-shaped main body is kept cool depending on the selected operating temperature range.

(Effects of the Invention) According to the present invention, it is possible to easily select the temperature setting of a container with a regenerative refrigeration unit, and it has become possible to change the container and use it in two or more temperature ranges. Since the cooling H (refrigeration plates) having different freezing temperatures start storing cold at the same time, there is no need to select the setting of the operating temperature before starting the cold storage operation, and it can be done at any time during or after the cold storage.

Since it is not a fan type, it is ideal for cooling containers that do not have a power source or batteries during transportation.

[Brief explanation of drawings]

Figures 1 to 3 show examples in which the present invention is implemented in a cold roll box. Figure 1 is a three-sided view of the cold roll box ((a) is a top view, middle) is a front view, and (C) is a three-sided view of the cold roll box. (Is a side view) Figure 2 is a refrigerant circuit diagram, and Figure 3 is an explanatory diagram of cooling within the box-shaped main body. 1-・・・・・−・−・・・Container box-shaped body 3
− ・・・・Condensing unit 4 ・・−・
−・−・−Cooler (freezing plate for medium temperature) 5−・・−・−−111−・−・Cooler (freezing plate for low temperature) 8 ・−・・
-・・-fft#i9.9−・−・−・Air inlet 10, IO−・・−Air outlet (can be opened and closed) Patent applicant
Toha Co., Ltd. ((r> CC) Fig.

Claims (1)

[Scope of Claims] A heat-insulating box-shaped body, a cooler provided on the wall inside the body and containing an evaporator through which a refrigerant flows and a cool storage material, and a compressor and a cooler provided outside the body.
It consists of a condensing unit that has a condenser, etc. and is driven by an external power source, and the inside of the main body is cooled by natural convection of air, and there are multiple coolers inside the main body,
Each cooler has built-in cold storage materials with different freezing temperatures, and is separated and enclosed from the inside of the main body by a guide plate.An air inlet is provided at the top of the guide plate, and an air outlet is provided at the bottom of the guide plate. A container with a cold storage type refrigeration unit, which has a cooling chamber and is characterized in that by selectively opening one of the air passages of each air cooling chamber, the cold storage temperature inside the main body can be selected.