JPH0777374A - Warming and cold storage box - Google Patents

Abstract

PURPOSE:To provide a warming and cold storage box in which heat is not reversed from out side the box into the box or from the inside box to outside of the box. CONSTITUTION:A warming and cold storage box comprises Peltier elements 13. A heat pipe 11 extended in the box or out of the box is provided at least on one surface of the elements 13, and reverse movement preventing means 81 for preventing heat transfer in a reverse direction is provided in the pipe 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm refrigerator utilizing the characteristics of a Peltier device.

[0002]

2. Description of the Related Art Generally, there is known a warm refrigerator in which a Peltier device is arranged in an opening provided in a storage wall. In this type, when a current is passed in one direction of the Peltier element, the Peltier effect causes a heat absorption effect on one surface and a heat dissipation effect on the other surface. In addition, it has a characteristic that when the direction of current flow is reversed, the surfaces that cause the above-mentioned effects of heat absorption and heat dissipation are reversed.

By the way, according to the conventional warm refrigerator, as shown in FIG.
As shown in FIG. 5, since the heat insulating material 123 is provided on the storage wall 121, the storage wall 121 becomes thicker accordingly. Therefore, the opening 125 of the storage wall 121 is devised, for example, by fitting the block 127 made of aluminum. 1
28 is a door, 129 is a Peltier element, 131 is a heat absorber, 1
33 is a heat sink.

However, in the above structure, when the aluminum block 127 is fitted into the opening 125, the heat capacity increases by that amount, and the heat transfer efficiency from the Peltier element 129 to the inside or outside of the refrigerator decreases. There's a problem.

Since the above-mentioned Peltier element is originally not so good in thermal efficiency, a device for improving it is extremely important.

In order to solve this, a heat pipe extending inside and outside the refrigerator is provided, and a part of the heat pipe is bent so that it is directly attached to each surface of the Peltier element located in the opening 125. Installation is suggested.

In this way, the heat capacity is reduced because the block 127 is not used, and the heat conductivity is improved.

[0008]

However, in the case of using a heat pipe, for example, when the switch of the Peltier element 129 is turned off during use as a refrigerator, a large amount of heat is generated in the refrigerator through the heat pipe. Backflow to the inside, causing the inconvenience of warming the inside of the refrigerator that had been cooled by then. Also, when using it as a hot storage,
When the switch of the Peltier element 129 is turned off, a large amount of heat flows back to the outside of the refrigerator through the heat pipe, which causes a disadvantage that the inside of the refrigerator that has been heated by that time is cooled.

Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional techniques and improve the above-mentioned heat transfer efficiency, and at the same time, to transfer heat from outside to inside the refrigerator or from inside to outside the refrigerator. It is to provide a warm refrigerator that can suppress backflow.

[0010]

In order to achieve the above object, the present invention provides a warm refrigerator having a Peltier element, wherein at least one surface of the Peltier element is provided in a refrigerator,
Alternatively, a heat pipe extending to the outside of the refrigerator is provided, and the heat pipe is provided with a reverse movement preventing means for preventing heat movement in the opposite direction.

Further, the present invention is characterized in that the reverse movement preventing means is a slit provided in a part of the heat pipe.

Further, the present invention is characterized in that the reverse movement preventing means is a notch provided in a part of the heat pipe.

[0013]

When a current is passed through the Peltier element, the Peltier effect causes a heat absorbing action on one surface and a heat radiating action on the other surface. When the direction of current flow is reversed, the above-mentioned effects of heat absorption and heat dissipation are reversed. This warm refrigerator uses this characteristic. According to the invention, on at least one face of the Peltier element,
Since a heat pipe extending inside or outside the refrigerator is provided and a reverse movement preventing means is provided at a part of the heat pipe, the heat transfer efficiency is improved, and the heat transfer is performed from the outside to the inside or inside the refrigerator. The backflow of heat from the outside to the outside of the refrigerator is suppressed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a warm refrigerator according to the present invention will be described below with reference to the drawings. In this specification, the term "aluminum" includes aluminum alloy as well as pure aluminum.

In FIG. 1, reference numeral 1 denotes a warm refrigerator, and a storage wall 3 of this warm refrigerator 1 is constructed by sandwiching a heat insulating material 3b between wall materials 3a. 2 is a door.

An opening 5 is provided in the storage wall 3, and a part 11a of a flat plate-shaped heat pipe panel 11 extending outside the storage 6 is inserted into the opening 5. A fin 8 is attached to a portion of the heat pipe panel 11 extending to the outside 6 as shown in FIG. Further, a Peltier element 13 is attached to a part 11a of the heat pipe panel 11, and the other surface of the Peltier element 13 is a flat heat pipe panel extending into the inside 7 as shown in FIG. 15 is attached.

Further, a plurality of slits 81 are provided in a part 11a of the heat pipe panel 11 which is inserted into the opening 5 of the storage wall 3. As will be described later, the slit 81 constitutes a reverse movement preventing means for preventing heat movement in the opposite direction.

By the way, in general, since the storage wall 3 contains the heat insulating material 3b, it becomes thick. Therefore, conventionally, a block made of aluminum is inserted into the opening 5, and a heat sink made of, for example, aluminum is attached to this block to improve the heat transfer efficiency (FIG. 15). However, as described above, the heat transfer efficiency decreases because the heat capacity of the block increases.

Therefore, according to this embodiment, the storage wall 3
A part 11 a of the heat pipe panel 11 is extended in the opening 5 of the above, and the Peltier element 13 is directly attached to the part 11 a. According to this, since the part 11a extending into the opening 5 is not a block but a heat pipe panel having excellent heat transfer efficiency as compared with the related art, the heat capacity becomes small, and sufficient heat transfer performance can be secured. it can.

Further, according to the above structure, the two heat pipe panels 11, 1 are sandwiched with the thin Peltier element 13 interposed therebetween.
5 will face each other.

In such a case, since the dimension between the two heat pipe panels 11 and 15 is small, a heat bridge is apt to occur between the panels, and when the switch of the Peltier element 13 is turned off, the high temperature side There is an inconvenience that heat moves (reverses) from the heat pipe panel to the heat pipe panel on the low temperature side.

For example, when this is used as a refrigerator, if the switch of the Peltier element 13 is turned off, a large amount of heat flows back through the heat pipe panels 11 and 15 into the refrigerator, and the refrigerator is cooled by then. The inside gets warm. Also, when the Peltier element 13 is turned off during use as a warm storage, a large amount of heat flows back to the outside of the storage through the heat pipe panels 11 and 15, so that the inside of the storage that has been warmed up to that point cools down. Will end up.

In order to eliminate this inconvenience, according to the present embodiment, a plurality of slits 81 are provided in a part 11a of the heat pipe panel 11 while leaving an area sufficient for mounting the Peltier element 13. It is provided.

According to this, since the facing area between the heat pipe panels 11 and 15 is reduced by the provision of the slit 81, the generation of the heat bridge is suppressed accordingly.
Therefore, heat transfer from the high temperature side to the low temperature side is suppressed.

In order to suppress the generation of the thermal bridge, it is desirable that the slit 81 is provided in as wide a range as possible while leaving a sufficient area for mounting the Peltier element 13. Further, it is desirable that the slit 81 is provided not only on the heat pipe panel 11 but also on the heat pipe panel 15.

FIG. 4 is a plan view showing an example of the heat pipe panel 11 described above.

The heat pipe panel 11 is manufactured by a so-called roll bond manufacturing method. That is, the planned refrigerant circuit portion 101 is printed on the aluminum plate 100 using a pressure-bonding preventive agent, and another aluminum plate 102 is superposed on it, rolled, and pressure-bonded. Then, high-pressure air is filled from the inlet portion 103, thereby expanding the refrigerant circuit expected portion 101 to form the refrigerant circuit 105, and thereafter, the heat pipe working fluid is enclosed and the seal portion 107 is crushed. Then, a plurality of slits 81, 81 ... 81 are provided on the plate surface, and the bending lines 109, 11 are formed.
Fold along 1 as shown in FIG.

According to this, as described above, it is extremely easy to form the part 11a to be inserted into the opening 5, and the refrigerant circuit 105 is also formed in the part 11a, so that the heat transfer rate is improved. Can be improved.

FIG. 5 shows another embodiment.

The heat pipe panel 31 is a panel extending to the outside 6 of the refrigerator, and this panel is the opening 5 of the refrigerator wall 3.
The width w of the part 31a to be inserted into is narrower than the width of the other part. In addition, a plurality of slits 83 as reverse movement preventing means are provided in a part 31a of the heat pipe panel 31, leaving an area sufficient for attaching the Peltier element 13. 33 is a fin.

According to this, the heat pipe panel 31
Is a flat roll-bonded panel, a part of which 31
The width w of a is formed to be narrower than the width of other portions, leaving an area sufficient for mounting the Peltier element 13, and since a plurality of slits 83 are provided in the portion 31a, the heat The conductivity is excellent and the heat capacity is small, and the above-described backflow of heat is suppressed.

FIG. 6 shows another embodiment.

According to this, the Peltier element 13 extends in the opening 5 of the cabinet wall 3, and the Peltier element 13 has a heat pipe panel 25 with fins extending in the cabinet 7,
The heat pipe panel 27 extending to the outside 6 is directly attached.

The heat pipe panel 25 constitutes a shelf for placing articles, and the heat pipe panel 25 is provided with a plurality of slits 85 as reverse movement preventing means as shown in FIG. According to this, since the heat transfer area is reduced accordingly, the heat capacity is reduced and the above-described backflow of heat is suppressed.

FIG. 8 shows still another embodiment.

According to this, as a reverse movement preventing means, the notch 1 is provided near the portion 141 where the Peltier element 13 is mounted.
43 is provided. That is, referring to FIGS. 8A to 8C, one side of the heat pipe panel 151 has a Peltier element 13
Two parts 141 for mounting are provided.
A notch 143 is provided near 41. The notch 143 may be formed by completely cutting it off, or may be formed by simply bending it. On the other side of the heat pipe panel 151, heat dissipation corrugated fins 153 are provided.
It is attached to the storage wall 3 via 55.

The heat pipe panel shown in FIG. 9 is paired with that shown in FIG. 8. For example, when the heat pipe panel shown in FIG. 8 is placed outside the refrigerator 6, the heat pipe panel shown in FIG. Will be placed. The heat pipe panel 171 is provided with two parts 161 for mounting the Peltier element 13, and a notch 163 is provided near these parts 161. Further, on the other side of the heat pipe panel 171, fins 173 for radiating heat are provided, and these are attached to the storage wall 3 via angles 175.

According to this, the heat pipe panel 15
The heat transfer efficiency is improved by using 1,171, and the Peltier element 13 is sandwiched between the heat pipe panels 151,1.
Since the positions of the notches 143 and 163 face each other when 71 is made to face each other, a heat bridge is not generated in that portion, so that the backflow of heat is suppressed.

The heat pipe panel described above is convenient in that it can be molded into any shape.

For example, the heat pipe panel 181 can be shaped as shown in FIG. 10a.
At this time, as shown in FIG.
The heat pipe panel 181 is attached by inserting the convex portion 181a of the heat pipe panel 181.

Further, the heat pipe panel 191 can be shaped as shown in FIG. 11a. At this time, as shown in FIG. 11b, the L-shaped portion 191a of the heat pipe panel 191 is inserted into the opening 5 of the storage wall 3 and attached. Furthermore, the heat pipe panel 21
1 can be molded in its shape as shown in FIG. 12a. At this time, as shown in FIG.
S-shaped portion 211a of the heat pipe panel 211 in the opening 5 of
Install by inserting.

In any case, the Peltier element 13 is attached to a part of the heat pipe panel outside the refrigerator 6, and the heat sink 213 is attached to the Peltier element 13. Since the Peltier element 13 is thin, the heat sink 213
Since there is less dimension between the heat pipe panel and
Since the heat bridge is easily formed as described above, it is desirable to provide the heat pipe panel with slits or notches as the reverse movement preventing means also in this embodiment.

FIG. 13 shows a heat pipe in which the heat pipe panel 221 and the heat transfer block 223 are integrated.

According to this, the heat pipe panel 221
6 holes 225 are bored in the working fluid circuit of the above, and the six holes 225 communicate with the hollow portion 227 of the heat transfer block 223. That is, these are as shown in FIG.
The heat transfer block 223 is joined by a brazing method or the like.
The working fluid circulates in the hollow portion 227 of the. The heat transfer block 223 is inserted into the opening 5 of the storage wall 3. The heat transfer block 223 includes a Peltier element 13
The heat sink 229 is attached to the Peltier element 13.

According to this, since the whole is a heat pipe, the heat transfer efficiency is improved, and the conventional block is unnecessary, so that the weight can be reduced and the number of parts can be reduced. A low cost can be realized.

In short, according to these embodiments, a part of the heat pipe panel is extended to the opening 5 of the storage wall 3,
Since a reverse movement prevention means (for example, a slit, a notch, etc.) is provided and a Peltier element 13 is attached to a part thereof, the heat capacity becomes smaller than that in the conventional case, the heat transfer efficiency is excellent, and the backflow of heat occurs. It is possible to suppress the above.

[0047]

As is apparent from the above description, according to the present invention, at least one surface of the Peltier element is provided with a heat pipe extending inside or outside the refrigerator, and a part of this heat pipe. Since the reverse movement preventing means for preventing the reverse movement of heat is provided in the above, the heat capacity becomes smaller as compared with the conventional case, and the above-mentioned backflow of heat can be suppressed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a warm refrigerator according to the present invention.

FIG. 2 is a perspective view showing an example of a heat pipe panel.

FIG. 3 is a perspective view showing an example of a heat pipe panel.

FIG. 4 is a plan view showing an example of a heat pipe panel.

FIG. 5 is a perspective view showing another embodiment.

FIG. 6 is a cross-sectional view showing another embodiment.

FIG. 7 is a perspective view showing an example of a heat pipe panel.

8A is a plan view of a heat pipe panel showing another embodiment, FIG. 8B is a side view of FIG. 8A, and FIG. 8C is an end view of FIG. 8A.

9A is a plan view of a heat pipe panel showing another embodiment, and FIG. 9B is an end view of FIG. 9A.

FIG. 10A is a perspective view showing a modified example of the heat pipe panel, and FIG. 10B is a sectional view showing a state where the heat pipe panel is attached to the storage wall.

11A is a perspective view showing a modified example of the heat pipe panel, and FIG. 11B is a cross-sectional view showing a state where the heat pipe panel is attached to the storage wall.

FIG. 12 (a) is a perspective view showing a modified example of the heat pipe panel, and FIG. 12 (b) is a sectional view showing a state where the heat pipe panel is attached to the storage wall.

FIG. 13 is a perspective view showing an example of a heat pipe panel.

FIG. 14 is a cross-sectional view showing a state in which the heat pipe panel of FIG. 13 is attached to a storage wall.

FIG. 15 is a cross-sectional view showing a conventional warm refrigerator.

[Explanation of symbols]

1 Heat Refrigerator 3 Storage Wall 3a Wall Material 3b Insulation Material 5 Opening 6 Outside Storage 7 Inside Storage 13 Peltier Element 11, 15, 21, 25, 27, 31, 151, 17
1,181,191,211,221 Heat pipe panel 81,83,85 Slit (reverse movement preventing means) 143,163 Notch (reverse movement preventing means)

Claims (3)

[Claims] 1. In a warm refrigerator having a Peltier element, at least one surface of the Peltier element is provided with a heat pipe extending inside or outside the refrigerator, and the heat transfer in the opposite direction is provided in the heat pipe. A warm refrigerator characterized by being provided with a reverse movement preventing means for preventing the above-mentioned problem. 2. The reverse movement preventing means is a slit provided in a part of the heat pipe.
The stated refrigerator. 3. The refrigerator according to claim 1, wherein the reverse movement preventing means is a notch provided in a part of the heat pipe.