JP2000274917A - Cooling storage chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage chamber capable of effectively utilizing heat dissipation from a Peltier element and simplifying a structure for heat dissipation. SOLUTION: A cooling storage chamber 1 includes a heat insulation box 2 where a heat insulation member 5 is filled between an outer box 3 and an inner box 4, a storage chamber 7 constructed in the heat insulation box, and a Peltier element 23 for cooling the inside of the storage chamber with a heat absorption surface thereof. Herein, there are further provided a heat dissipation pipe 13 disposed on the heat dissipation surface of the Peltiler element in a heat exchange manner, and a defrosting preventing pipe 24 additionally disposed on the heat insulation member side of the outer box located at an opening edge of the storage chamber. These pipes are coupled to construct an annular cooling water circulation passage, and a pump 14 is provided among these pipes for circulating cooling water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling storage for cooling a storage chamber formed in a heat insulating box by a Peltier device.

[0002]

2. Description of the Related Art Conventionally, for example, in a guest room of a hotel or a hospital room of a hospital, an electronic refrigerator using a Peltier element as disclosed in Japanese Patent Application Laid-Open No. 7-243747 is employed. This Peltier element is configured by joining two types of thermoelectric semiconductors, consisting of a P-type element and an N-type element, in a π-type with metal electrodes. When a current flows from the N-type element to the P-type element, the Peltier effect is applied. It absorbs heat from one surface (heat absorbing side) and radiates heat from the other surface (radiating side),
The heat absorption at this time is used to cool the storage room of the refrigerator.

In this case, since the operating efficiency of the Peltier element depends on the heat radiation efficiency on the heat radiation surface, conventionally, a method of cooling the air by attaching heat radiation fins to the heat radiation surface of the Peltier element, or using a heat radiation pipe on the heat radiation surface. attachment,
A method of cooling with water by flowing cooling water into the heat radiating pipe is adopted. Then, the cooling water in the heat dissipation pipe has been cooled by a radiator disposed below the cooling storage.

[0004]

On the other hand, since dew condensation occurs in the outer box at the front opening edge of the storage room due to the cooling action from the storage room, conventionally, this type of refrigerator has conventionally had an outer box at the opening edge of the storage room. Was provided with an electric heater for preventing dew condensation.

[0005] As described above, in the conventional cooling storage, since the electric heater is provided to prevent dew condensation on the opening edge, there is a problem that power consumption increases and cooling efficiency decreases.

Accordingly, the present invention has been made to solve the above-mentioned conventional technical problem, and a cooling storage which can effectively utilize the heat radiation from the Peltier element and can simplify the structure for the heat radiation. It is intended to provide.

[0007]

According to a first aspect of the present invention, there is provided a cooling storage box comprising: a heat insulating box formed by filling a heat insulating material between an outer box and an inner box; a storage chamber formed in the heat insulating box; A peltier element that cools the storage room with a heat absorbing surface, wherein the radiating pipe is provided on the radiating surface of the peltier element in an insulated manner, and a heat insulating material of an outer box located at an opening edge of the storage room And a pipe for preventing dew condensation attached to the side, a pipe for connecting the two pipes to form an annular cooling water circulation path, and a pump for circulating cooling water between these pipes is provided. Things.

According to the first aspect of the present invention, the storage chamber is filled with a heat insulating material between the outer box and the inner box, the storage room formed in the heat insulation box, and the storage room is cooled by the heat absorbing surface. In a cooling storage provided with a Peltier element, a heat-radiating pipe provided on the heat-dissipating surface of the Peltier element and a dew attached to the heat-insulating material side of an outer box located at the opening edge of the storage room. Prevention pipes are provided, and these two pipes are connected to form an annular cooling water circulation path, and a pump for circulating cooling water is provided between these pipes, so a special forced radiator such as a radiator should be provided. Therefore, the heat dissipation surface of the Peltier element can be efficiently cooled.

Further, since the cooling water radiates heat through the dew-prevention pipe connected to the heat radiating pipe, the outer box located at the opening edge of the storage room is heated without providing a special electric heater to form dew condensation. Can be prevented from occurring.

[0010] The cooling storage according to the second aspect of the present invention is an insulation box formed by filling a heat insulating material between an outer box and an inner box, a storage room formed in the insulation box, and a heat absorbing surface to form the storage room. A peltier element for cooling, comprising a radiating pipe provided on the radiating surface of the peltier element in a heat exchange manner and a frame pipe attached to an outer box, and connecting these two pipes. And a pump for circulating cooling water is provided between these pipes.

According to the second aspect of the present invention, the heat insulating box is formed by filling a heat insulating material between the outer box and the inner box, the storage room formed in the heat insulating box, and the heat absorbing surface cools the storage room. A radiating pipe provided on the radiating surface of the peltier element, and a frame pipe attached to the outer box, and connecting these two pipes. The cooling water circulation path was formed, and a pump for circulating the cooling water was provided between these pipes. Thus, the heat dissipation surface of the Peltier element can be efficiently cooled without providing a special forced heat dissipation device.

A cooling storage according to a third aspect of the present invention is provided with a heat absorbing pipe provided on the heat absorbing surface of the Peltier element in an insulated manner and a cooling pipe attached to the inner box in each of the above inventions. A pipe is connected to form an annular cooling water circulation path, and a pump for circulating cooling water is provided between the pipes.

According to the third aspect of the present invention, in addition to the above-mentioned inventions, a heat-absorbing pipe provided on the heat-absorbing surface of the Peltier element and a cooling pipe attached to the inner box are provided. The two pipes are connected to form an annular cooling water circulation path, and a pump for circulating cooling water is provided between these pipes, so that the cooling water cooled on the heat absorbing surface of the Peltier element is transferred to the heat insulating material side of the inner box. And circulates through the cooling pipe to cool the storage room from the surroundings.

[0014]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cooling storage 1 to which the present invention is applied.
FIG. 2 is a longitudinal sectional side view of a cooling storage 1 to which the present invention is applied.

The cooling storage 1 according to the embodiment is a refrigerator installed in, for example, a guest room of a hotel or a hospital room of a hospital, and has a main body constituted by a heat insulating box 2 opened at the front.

The heat-insulating box 2 is made of, for example, an inner box 4 made of, for example, a hard resin having an opening at the front, an outer box 3 made of a steel plate having an opening at the front, and a polyurethane foam-filled between the two boxes 4, 3. It is composed of a heat insulating material 5. A rear panel 9 is provided behind the rear plate 10 of the outer box 3 at a predetermined interval.

Inside the inner box 4 of the heat-insulating box 2, a storage room 7 having an opening 6 on the front surface is formed. A heat-insulating door (not shown) that closes the opening 6 so that it can be opened and closed is attached to the front surface of the heat-insulating box 2.

The back wall 4A of the inner box 4 of the storage room 7 has an opening (not shown) for mounting a Peltier cooling device 18 described later. This Peltier cooling device 18
On the front side of the cooling sink 20, a partition 21 extending from below the cooling sink 20 to the upper part in the storage room 7 is attached at a predetermined distance from the back wall 4 </ b> A of the inner box 4. In the storage room 7 in front of the partition 21, a shelf (not shown) for placing foods and the like is provided.

A vertically extending cold air duct 22 is formed between the partition wall 21 and the back wall 4A.
Are located in the cool air duct 22. The upper end of the partition 21 is, for example, a horizontal surface 21A extending horizontally toward the front.
The front end of the horizontal plane 21A is bent vertically upward to close the end of the cool air duct 22.

A discharge port 45 for cool air is formed in the horizontal plane 21A, and the blower 1 is provided inside (upper side) of the discharge port 45.
9 are arranged and attached to the partition 21. Also,
A suction port 46 for sucking cool air in the storage chamber 7 is formed at a lower end of the partition 21.

On the other hand, a duct 11 is formed between the rear panel 9 and the rear plate 10 of the outer box 3, and a lower portion of the duct 11 is connected to a brine 13, which will be described later. (Cooling water) Liquid reservoir 14 and circulation pump 1
5 are arranged.

The outer box 3 located at the opening edge of the storage room 7
A pipe 24 for preventing dew is provided on the side of the heat insulating material 5, and a frame pipe 25 is formed in a meandering shape on the side of the heat insulating material 5 on the top and side surfaces of the outer box 3 as shown in FIG. It is molded and attached. In FIG. 3, the back plate 10 is removed.

The heat radiating pipe 13 and the brine reservoir 1
4. The circulation pump 15, the dew-prevention pipe 24, and the frame pipe 25 are sequentially connected by pipes to form an annular brine (cooling water) circulation path, and a water cooling circuit filled with brine is formed therein. .

Next, the Peltier cooling device 18 will be described with reference to FIG. FIG. 4 shows a Peltier cooling device 18.
It is a vertical side view. The Peltier cooling device 18 includes a Peltier device 23, a heat sink 12, and the heat dissipation pipe 1.
3 and a cooling sink 20. The heat radiating pipe 13 is formed in a meandering shape by a copper pipe or an aluminum pipe.

The heat sink 12 is provided on the heat radiating surface of the Peltier element 23 in an exothermic manner. The front surface of the heat sink 12 contacts the heat radiating surface of the Peltier element 23 and then expands while retracting. .

A groove 30 having a shape conforming to the meandering shape of the heat radiating pipe 13 is formed on the rear surface of the heat radiating sink 12 for fitting the heat radiating pipe 13.
The inner surface of 0 is approximately the same size as the outer diameter of the heat radiating pipe 13. The heat-dissipating pipe 13 is attached to the heat-dissipating sink 12 so as to be provided on the heat-dissipating surface of the Peltier element 23 in a heat-exchange manner.

In FIG. 4, reference numeral 31 denotes a heat sink 1
2 and a heat-insulating connector for integrating the Peltier element 23 and the cooling sink 20. This connector 3
Reference numeral 1 denotes a rectangular box that is open to the front and back, and a heat sink 1
2 is formed to have a dimension to come into contact with the peripheral surface.

Here, when the connector 31 is attached to the heat sink 12, the Peltier device 23 and the cooling sink 20, the two sinks 12, 20, the Peltier device 23 and the connector 31 surround the inside of the connector 31. A space S is formed. At a position corresponding to the space S of the connecting tool 31, a plurality of partition walls 32 for dividing the space S into a plurality are formed across the left and right. At this time, it is assumed that the partition wall 32 is formed so as not to abut on both the sinks 12 and 20.

With the above configuration, the Peltier cooling device 18
In the assembling procedure, the heat absorbing surface (front surface) of the Peltier element 23 is coated with a heat conductive grease or the like, and is then brought into contact with the cooling sink 20. Next, the connection tool 31 is connected to the Peltier device 23.
, And the connecting tool 31 is fixed to the cooling sink 20 with a plurality of screws 33.

Then, after applying heat conduction grease or the like to the heat dissipation surface (rear surface) of the Peltier element 23, the heat sink 1
2 into the connector 31 and the Peltier device 23
Contact the heat dissipation surface of Then, the heat sink 12 and the connector 3 are connected by a plurality of screws 34.
Fix 1

Then, the heat radiating pipe 13 is inserted into the groove 30 of the heat radiating sink 12 from behind the heat radiating sink 12, and the mounting plate 35 is mounted on the rear surface of the heat radiating sink 12 with screws 36. The opening of the groove 30 is closed. At this time, the depth of the groove 30 is substantially the same as the outer diameter of the heat radiating pipe 13, and the heat radiating pipe 13 is closely attached to the groove 30 by attaching the mounting plate 35 to complete the Peltier cooling device 18. .

When the Peltier element 23 is energized, a cooling effect is exerted on the heat absorbing surface, and the cooling sink 20
Is cooled. At this time, the blower 19 is operating, and the cool air cooled by the cooling sink 20 in the cool air duct 22 is discharged from the discharge port 45 into the storage room 7. Then, after circulating in the storage room 7, the air is sucked into the cool air duct 22 from the suction port 46 and returns to the cooling sink 20.

On the other hand, the heat generated from the heat radiation surface of the Peltier element 23 is transmitted to the heat radiation sink 12. The circulating pump 1 is inserted into the heat-dissipating pipe 13
The cooling water is circulated by 5, and the heat transmitted to the heat sink 12 is transferred to the cooling water to heat it.

The cooling water whose temperature has risen due to the heat exchange with the heat sink 12 exits the heat radiation pipe 13 and flows into the dew-prevention pipe 24.
The cooling water that has flowed out further flows into the frame pipe 25.
Then, the dew-prevention pipe 24 and the frame pipe 25 are cooled by the outside air around the cooling storage 1 via the outer box 3. As a result, the cooling water whose temperature has dropped is circulated again to the heat radiating pipe 13 of the heat radiating sink 12 by the circulation pump 15.

As described above, the heat generated from the heat radiation surface of the Peltier element 23 is transmitted from the heat radiation sink 12 to the heat radiation pipe 13.
And is conveyed to the dew-prevention pipe 24 and the frame pipe 25 via the cooling water and is forcibly externally (in the outside air).
Will be dissipated.

At this time, since the dew-prevention pipe 25 is attached to the heat insulating material 5 side of the outer box 3 located at the opening edge of the storage room 7, the outer box 3 located at the opening edge of the storage room 7 is provided. Is heated by the cooling water so that dew is prevented from occurring.

Thus, unlike the conventional cooling storage, an electric heater is not attached to the opening edge of the storage room, and the storage room 7
Can be prevented beforehand from occurring on the outer box 3 at the opening edge.

Further, since the frame pipe 25 is attached to the heat insulating material 5 side of the outer box 3, the frame pipe 25
Is transmitted to the outer case 3 and diffused from the substantially entire surface of the outer case 3 into the surrounding outside air.

Thus, the radiating surface of the Peltier element can be efficiently cooled without providing a radiator or the like for forcibly cooling the cooling water unlike the related art. And
Since the radiator disposed at the lower part of the cooling storage becomes unnecessary, the size of the cooling storage or the capacity of the storage room 7 can be increased. Furthermore, since the radiator is no longer required, it is not necessary to attach a fan that has been installed to cool the radiator, and the cost can be reduced by reducing the number of parts and the operation noise of the fan can be eliminated. .

In the embodiment, the system in which the cold air is forcibly circulated in the storage chamber 7 is not limited thereto, or in addition thereto, a heat absorbing pipe provided on the heat absorbing surface of the Peltier element 23 in an insulated manner. And a cooling pipe attached to the heat insulating material 5 side of the inner box 4. The two pipes are connected to form an annular cooling water circulation path, and a pump for circulating cooling water is provided between the pipes. For example, the cooling water cooled on the heat absorbing surface of the Peltier element 23 can be circulated to the cooling pipe on the heat insulating material 5 side of the inner box 4 to cool the storage room 7 from the surroundings.

[0041]

According to the first aspect of the present invention, as described in detail above, a heat insulating box formed by filling a heat insulating material between an outer box and an inner box;
In a cooling storage provided with a storage room configured in the heat insulation box and a Peltier element that cools the storage room with a heat absorbing surface, a heat-radiating pipe provided on the heat-radiating surface of the Peltier element in a heat exchange manner, And a dew-prevention pipe attached to the heat insulating material side of the outer box located at the opening edge of the outer box.These pipes are connected to form an annular cooling water circulation path, and cooling water is supplied between these pipes. Since the circulating pump is provided, the radiating surface of the Peltier element can be efficiently cooled without providing a special forced radiator such as a radiator.

Further, since the cooling water radiates heat through the dew-prevention pipe connected to the radiating pipe, the outer box located at the opening edge of the storage room is heated without providing a special electric heater, thereby forming dew condensation. Can be prevented from occurring.

According to the second aspect of the present invention, the heat insulating box is formed by filling a heat insulating material between the outer box and the inner box, the storage room formed in the heat insulating box, and the heat absorbing surface cools the storage room. A radiating pipe provided on the radiating surface of the peltier element, and a frame pipe attached to the outer box, and connecting these two pipes. The cooling water circulation path was formed, and a pump for circulating the cooling water was provided between these pipes. Thus, the heat dissipation surface of the Peltier element can be efficiently cooled without providing a special forced heat dissipation device.

According to the third aspect of the present invention, in addition to the above-mentioned inventions, a heat absorbing pipe provided on the heat absorbing surface of the Peltier element and a cooling pipe attached to the inner box are provided. The two pipes are connected to form an annular cooling water circulation path, and a pump for circulating cooling water is provided between these pipes, so that the cooling water cooled on the heat absorbing surface of the Peltier element is transferred to the heat insulating material side of the inner box. And circulates through the cooling pipe to cool the storage room from the surroundings.

[Brief description of the drawings]

FIG. 1 is a perspective front view of a cooling storage to which the present invention is applied.

FIG. 2 is a vertical side view of a cooling storage to which the present invention is applied.

FIG. 3 is a perspective view of a cooling storage to which the present invention is applied.

FIG. 4 is an enlarged vertical sectional side view of the Peltier cooling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling storage 2 Heat insulation box 3 Outer box 4 Inner box 4A Back wall 5 Insulation material 7 Storage room 10 Back plate 11 Duct 12 Heat sink 13 Heat dissipation pipe 18 Peltier cooling device 19 Blower 20 Cooling sink 21 Partition wall 22 Cold air duct 23 Peltier Element 24 Dew-prevention pipe 25 Frame pipe

Continued on the front page (72) Inventor Junichi Kubota 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd. (72) Inventor Kenji Nojima 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Ken Yamada 2-5-5, Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3L045 AA01 AA06 BA01 CA02 DA04 EA01 PA04

Claims (3)

[Claims] 1. A heat insulating box comprising an outer box and an inner box filled with a heat insulating material, a storage room formed in the heat insulating box, and a Peltier element for cooling the storage room by a heat absorbing surface. In the cooling storage, a heat-dissipating pipe provided on the heat-dissipating surface of the Peltier device and a dew-prevention pipe attached to a heat-insulating material side of an outer box located at an opening edge of the storage chamber. A cooling storage, characterized in that the two pipes are connected to form an annular cooling water circulation path, and a pump for circulating cooling water is provided between the pipes. 2. An insulating box comprising an outer box and an inner box filled with a heat insulating material, a storage room formed in the heat insulating box, and a Peltier element for cooling the storage room by a heat absorbing surface. A cooling pipe provided with a heat-dissipating pipe provided on the heat-dissipating surface of the Peltier element and a frame pipe attached to the outer box. And a pump for circulating cooling water between the pipes. 3. A cooling water circulation path comprising an annular heat-absorbing pipe provided on the heat-absorbing surface of the Peltier element and a cooling pipe attached to the inner box. And a pump for circulating cooling water is provided between the pipes.
Cold storage.