JPS644061Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a dry ice type refrigerated container used mainly on board a transport aircraft such as an aircraft.

Conventionally, this type of cooling device for cold storage containers supplies carbon dioxide gas cold air generated from dry ice to a heat transfer body to cool the heat transfer body and indirectly cool the inside of the cold storage chamber, while also directly directing a portion of the cold air into the cold storage chamber. In general, the inside of the cold storage chamber is cooled by supplying the cold storage water.

However, in such a case, the cold carbon dioxide gas directly acts on the cargo such as fresh food in the cold storage room, which may cause frostbite, and it also has the disadvantage of obstructing the breathing of living things such as fruits, vegetables, fish, and shellfish. However, there is a disadvantage that it is difficult for the indoor temperature distribution to be uniform.

The purpose of the present invention is to obtain a cooling device for a dry ice-type cold storage container that does not have such inconveniences, and supplies cold carbon dioxide gas generated from dry ice to a heat transfer body 2 housed in a cold storage chamber 1. In the cold storage container of the type that keeps the inside of the cold storage room 1 cold, the heat transfer body 2 is configured to have a flat sealed space that covers almost the entire ceiling surface of the cold storage room 1, and this A large number of through holes 2a are provided in the cold storage chamber 1 at a predetermined interval from each other, and communicate the upper and lower surfaces of the heat transfer body 2, so that the closed space of the heat transfer body 2 and the dry ice storage chamber 3 are connected to each other. and a collection box 5 equipped with an excess gas release control device 4 are communicated with each other, and pre-filled carbon dioxide gas cold air is forcedly circulated across the closed space of the heat transfer body 2, the dry ice storage chamber 3, and the collection box 5. A temperature switch 15 is provided in the motor drive circuit of the fan 6, which closes when the temperature of the cold storage chamber 1 exceeds a certain temperature.

The illustrated dry ice storage chamber 3 is provided along one side of the heat transfer body 2, and the dry ice storage chamber 3 includes a plurality of small chambers 3a laid out so as to communicate with each other only at the lower part, An opening 3b is provided at the upper part of the small chamber 3a at the end of the first side, and the opening 3b and the heat transfer body 2
The opening 2b provided in
The collecting box 5 is connected to the collecting box 5 through a duct 9, and the opening 2c provided in the heat transfer body 2 of the collecting box 5 is connected to the collecting box 5 through a duct 9. The carbon dioxide gas cooled by the heat transfer body 2, the collection box 5, and the dry ice storage chamber 3
The inside of the cold storage chamber 1 is cooled by the heat transfer body 2.

An orifice is provided as the excess gas release control device 4, and a portion of carbon dioxide gas is released to the outside by the orifice to adjust the pressure.

The duct 9 is formed by applying a natural rubber film around the outer periphery of a silicone rubber film to be resistant to low temperatures and strong against external forces, and is designed to prevent heat between the heat transfer body 2 and the dry ice storage chamber 3. It is now possible to absorb expansion and contraction caused by changes.

Reference numeral 10 indicates a storage chamber for an operation panel 11 provided close to the collection box 5, and an inner wall 10a of the storage chamber 10
A through hole 10b for adjusting the fan 6 was provided in the. 12 is the lid applied to this, 13 is the lid applied to the storage chamber 10,
Reference numeral 14 denotes a sensing section for sensing the temperature inside the refrigerator and operating the switch 15.

In the heat transfer body 2, a plurality of cutout plates 2d for meandering carbon dioxide gas cold air are provided, and the outer wall of the cold storage chamber 1 and the walls of each storage chamber are provided with a heat insulating material, and the motor drive circuit of the fan 6 is Using dry batteries as a power source, it can be used even in places where there is no power supply equipment, such as those brought directly to the user from a fish farm or market.

In this way, according to the present invention, the heat transfer body 2 is configured to have a closed space through which cold carbon dioxide gas passes, and the closed space of the heat transfer body 2 and the dry ice storage chamber 3 are connected to each other for releasing excess gas. Adjustment device 4
Since a fan 6 is provided to forcefully circulate the carbon dioxide gas cold air across the collection box 5 having a The cold air is only circulated in the collection box 5 and directly flows into the cold storage room 1.
There is no inconvenience as seen in the conventional example due to this, and since a part of the excess gas is released to the outside via the excess gas release control device 4 provided in the collection box 5, the carbon dioxide There is no inconvenience such as interfering with the circulation of cold gas or damaging the heat transfer body 2 due to pressure, and the fan 6
Since a temperature switch 15 that closes when the temperature inside the cold storage chamber 1 is higher than a certain temperature is intervened in the motor drive circuit of
As a result, the temperature inside the cold storage chamber 1 can be maintained at a substantially constant temperature, and this temperature can be adjusted by using the closed heat transfer body 2 as in the conventional case. Since this type of system does not release cold carbon dioxide gas to the cold storage chamber 1, when the fan 6 is stopped, the release of cold carbon dioxide gas to the heat transfer body 2 can be almost completely cut off, so the adjustment can be made with extremely high precision. Furthermore, the heat transfer body 2 is configured to be flat so as to cover almost the entire ceiling surface of the cold storage chamber 1, and the heat transfer body 2 is placed within the cold storage chamber 1 with a predetermined distance from the ceiling surface. Since the upper and lower surfaces of the heat transfer body 2 are provided with a large number of through holes 2a that communicate with each other, the upper and lower surfaces of the heat transfer body 2 can be used as heat transfer surfaces, and the cold air on the upper surface can be drawn through the through holes 2a. The heat exchange efficiency can be increased by guiding the cold air downward, and since the outer periphery of the through hole 2a helps the meandering of the cold air moving in the closed space, there are effects such as uniform cooling of the heat transfer body 2. .

[Brief explanation of the drawing]

The drawing shows one example of the embodiment of the present invention.
The figure is a slope view, the second figure is a cutaway side view, and the third figure is a second side view.
FIG. 4 is a cross-sectional view taken along the line, FIG. 5 is a cross-sectional view taken along the line. DESCRIPTION OF SYMBOLS 1... Cold storage room, 2... Heat transfer body, 3... Dry ice storage chamber, 4... Excess gas release control device, 5...
...Collection box, 6...Fan, 15...Temperature switch.

Claims (1)

[Scope of utility model registration request] In a cold container that keeps the inside of the cold storage chamber 1 cool by supplying carbon dioxide gas cold air generated from dry ice to the heat transfer body 2 stored in the cold storage chamber 1, the heat transfer body 2 is placed on the ceiling of the cold storage chamber 1. A flat sealed space covering almost the entire area of the heat transfer body 2 is provided in the cold storage chamber 1 at a predetermined distance from the ceiling surface, and a large number of airtight spaces are provided to communicate the upper and lower surfaces of the heat transfer body 2. A through hole 2a is provided to communicate the closed space of the heat transfer body 2, the dry ice storage chamber 3, and the collection box 5 equipped with the excess gas release control device 4, and the closed space of the heat transfer body 2 is and dry ice storage room 3 and collection box 5
Cooling of a dry ice-type cold storage container is provided with a fan 6 that forcibly circulates the carbon dioxide gas cold air over the entire range, and a temperature switch 15 that closes when the temperature of the cold storage chamber 1 is higher than a certain temperature is inserted into the motor drive circuit of the fan 6. Device.