JP4135913B2 - Cold storage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic cold storage room using an electrothermal conversion element, and more particularly to a cold storage room using a Peltier element.
[0002]
[Prior art]
In recent years, with the growing environmental problems, electronic refrigerators that do not emit chlorofluorocarbons have attracted attention. As one of such electronic cold storage cabinets, a Peltier element, which is an electrothermal conversion device that operates as a heat pump by flowing a direct current through an electrothermal semiconductor, is used, and the box body has a double structure, and the air gap is vacuumed or Various electronic refrigerators have been proposed that are configured to be in a state close to vacuum, prevent heat conduction due to convection between the heat-absorbing side and the heat-dissipating side of the Peltier element, and to be well insulated even with a small gap (for example, patents) References 1-4).
[0003]
[Patent Document 1]
JP 2001-133074 A [Patent Document 2]
JP 2001-165389 A [Patent Document 3]
JP 2003-35480 A [Patent Document 4]
Japanese Patent Laid-Open No. 11-294922
[Problems to be solved by the invention]
However, in the cold storage warehouse disclosed in the above-mentioned Patent Documents 1 to 4, since the heat conductive member is formed in a box shape, a pressing die for drawing is required, which reduces the cost. In addition to the difficulty, it has been difficult to reduce the power consumption of the electrothermal conversion element that performs heat dissipation or heat absorption. Further, the provision of an expensive vacuum heat insulating layer around such a box-shaped heat conductive member also causes a problem that it is difficult to reduce the cost.
[0005]
In view of the above-described problems of the prior art, an object of the present invention is to provide a refrigerated storage cabinet that can reduce costs with a simple configuration and can reduce power consumption.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the cold storage room according to the present invention is a cold storage room that cools or superheats the inside of the storage room via a heat transfer member, and includes two electrothermal conversion means, a bottom surface, and a longitudinal end of the bottom surface. A U-shaped heat transfer member having two side surfaces; and the heat transfer member is mounted; and a bottom surface and two side surfaces orthogonal to the two side surfaces of the heat transfer member and higher than the two side surfaces. Having a U-shaped first heat insulating member, a second heat insulating member covering the outer surface of the heat conductive member and the end of the first heat insulating member, and a lid on the upper part, An electrothermal conversion means and a housing for housing the first and second heat insulating members, and the electrothermal conversion means is disposed outside one of the two side surfaces of the heat transfer member. It is characterized by that.
[0007]
In the cold storage room of the present invention configured as above, an electrothermal conversion means, a U-shaped heat conductive member having a bottom surface and two side surfaces at the longitudinal ends of the bottom surface, and a heat conductive member are mounted. A U-shaped first heat insulating member that is perpendicular to the bottom surface and the two side surfaces of the heat conductive member and has two side surfaces that are higher than the two side surfaces; A second heat insulating member that covers an end portion of the one heat insulating member, and a housing that has a lid portion on the upper portion and that accommodates the electrothermal conversion means and the first and second heat insulating members. Since the means is disposed on one of the two side surfaces of the heat transfer member, the heat transfer member can be manufactured only by bending, and a conventional press die is not required, thereby reducing costs. it can. Further, by using different heat insulating members, it is possible to further reduce costs by keeping the use of expensive heat insulating members to the minimum necessary while maintaining the heat insulating effect.
[0008]
Here, the first heat insulating member is formed of a vacuum heat insulating panel, the second heat insulating member is formed of a heat insulating resin, and an end portion of the vacuum heat insulating panel is bent inward to form the heat insulating resin. It may be covered with.
[0009]
In this case, the first heat insulating member is formed of a vacuum heat insulating panel, the second heat insulating member is formed of a heat insulating resin, and the end of the vacuum heat insulating panel is bent inward and covered with the heat insulating resin. Therefore, the use of an expensive vacuum insulation panel is kept to the minimum necessary, and the end of the vacuum insulation panel, which is in contact with the outside air and has a large heat leak, is squeezed inward to insulate the periphery of this end By covering with resin, the heat insulation can be further enhanced.
[0010]
Further, a support member that detachably supports the refrigerant may be disposed inside one side surface of the heat transfer member in which the electrothermal conversion means is disposed.
[0011]
In this case, since the supporting member for detachably supporting the refrigerant is disposed inside one side surface of the heat transfer member having the electrothermal conversion means disposed on the outside, the cold storage cabinet is used as a cooling device. When used, by attaching a refrigerant to this support member, the refrigerant accumulates heat even after the power supply of the cooling device is turned off, so that the cold keeping time can be extended as compared with the case without the refrigerant.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
[0013]
First, the structure of the cold storage warehouse which concerns on this invention is demonstrated with reference to FIGS. 1-3.
[0014]
FIG. 1 is a perspective view showing a configuration excluding a lid portion of a cold / hot storage according to the present invention. Moreover, FIG. 2 is sectional drawing of the cold storage warehouse which concerns on this invention, (a) is longitudinal direction sectional drawing, (b) is side sectional drawing. FIG. 3 is a top view schematically showing the structure of the side end of the vacuum heat insulating panel.
[0015]
As shown in FIGS. 1 and 2, the cold storage 1 according to an embodiment of the present invention has side surfaces 5 a and 5 b and a bottom surface 5 c inside a box-shaped housing 3 having a lid portion 3 a at the top. A vacuum heat insulating panel 5 which is a first heat insulating member formed by bending a single panel is housed in a side cross-section, and further, a U-shaped vacuum heat insulating panel is housed inside thereof. 5 is a U-shaped heat transfer member having a side surface 7a, 7b and a bottom surface 7c provided at the end in the longitudinal direction and having a height lower than that of the side surfaces 5a, 5b of the vacuum heat insulating panel 5 so as to be orthogonal to 5. An aluminum plate 7 is provided. In addition, a Peltier element 9 as an electrothermal conversion means is attached in the vicinity of the outer lower portion of one side surface 7a of the aluminum plate 7, and, for example, four inverted characters are formed inside the side surface 7a of the aluminum plate 7. The support member 11 is disposed. A temperature sensor 13, a heat radiating fin 15, and a fan 17 are provided outside the Peltier element 9. Further, an internal temperature sensor 14 is provided in the internal space formed inside the box-shaped housing 3. Here, it is desirable that the internal temperature sensor 14 is provided in the central part of the storage where both the time for the internal temperature to reach the target temperature and the temperature difference in the internal storage balance according to the internal volume and shape. .
[0016]
Moreover, as schematically shown in FIG. 3, the side end portions 51a and 51b of the side surfaces 5a and 5b of the vacuum heat insulating panel 5 and the outer side surfaces of the side surfaces 7a and 7b of the aluminum plate 7 are second heat insulating members. It is covered with a certain heat insulating resin, for example, a foam heat insulating urethane resin 19. That is, the side end portions 51a and 51b of the side surfaces 5a and 5b of the vacuum heat insulating panel 5 are bent (squeezed) inward, and the vicinity of the side end portions 51a and 51b extends over the entire edge. 19 is covered.
[0017]
In addition, about the cover part 3a, it may be formed with the vacuum heat insulation panel 5 which is a 1st heat insulation member, and may be formed with the foam heat insulation urethane resin 19 which is a 2nd heat insulation member. Here, the vacuum heat insulation panel 5 is higher in heat insulation and expensive than the foam heat insulation urethane resin 19, and as shown in FIG. 4, the core material 5g and a gas barrier laminate film material formed in a multilayer structure. 5f. The core material 5g is formed of, for example, glass wool or continuous urethane, and the inside of the core material is kept at a low vacuum. Thereby, the heat conduction by a convection can be blocked | prevented and the favorable heat insulation effect can be acquired.
[0018]
In the cold storage 1 of the present invention configured as described above, the aluminum plate 7 which is a heat conductive member is formed into a U shape having a bottom surface 7c and side surfaces 7a and 7b, whereby the aluminum plate 7 is bent. Therefore, a conventional press die is not required, and the cost can be reduced. Similarly, by folding a single vacuum insulation panel 5 into a U-shape having a bottom surface 5c and side surfaces 5a and 5b, the side surfaces 5a and 5b and the bottom surface 5c are formed separately. Compared with the structure which couple | bonds, heat leak from the coupling | bond part of the laminate film material 5f of the vacuum heat insulation panel 5 shown by FIG. 4 can be reduced, and heat insulation can be improved. Further, by combining the vacuum heat insulation panel 5 formed in this way with the aluminum plate 7, the use of the expensive vacuum heat insulation panel 5 is kept to the minimum necessary, the cost is reduced, and the contact portion with the outside air having a large heat leak The side end portions 51a and 51b of the vacuum heat insulating panel 5 are bent inward, and the periphery of the side end portions 51a and 51b is covered with the foamed heat insulating urethane resin 19, thereby reducing heat leakage and further improving the heat insulating property. be able to.
[0019]
In addition, when using the thus configured cold storage 1 as a cooling device, the support member 11 is disposed on the inner surface of the side surface 7a to which the Peltier element 9 of the aluminum plate 7 is attached. For example, as shown in FIG. 5, by hooking protrusions 20 a provided on both side surfaces of the water tank 20 that is a cooling medium to a reverse-shaped support member 11 provided on the side surface 7 a of the aluminum plate 7. The water tank 20 can be easily and detachably attached in the vicinity of the Peltier element 9. Thereby, even after the power supply of the cooling device 1 is cut off, the water tank 20 as the refrigerant stores heat, thereby improving the heat storage effect and obtaining ice making efficiently and quickly by using it as an ice making box. Can do.
[0020]
Next, another embodiment of the cold / hot warehouse 1 of the present invention will be described with reference to FIG.
[0021]
FIG. 6 is a side view schematically showing the structure of the upper end portion of the vacuum heat insulating panel.
[0022]
In another embodiment, the bent portions 51a and 51b of the vacuum heat insulating panel 5 in the previous embodiment are upper end portions 53a and 53b. For the sake of simplicity, similar members are denoted by the same reference numerals. Shall.
[0023]
In this embodiment, as schematically shown in FIG. 6, the upper ends 53 a and 53 b of the side surfaces 5 a and 5 b of the vacuum heat insulating panel 5 having a height higher than the side surfaces 7 a and 7 b of the aluminum plate 7 and the aluminum plate 7. The outer surfaces of the side surfaces 7a and 7b are covered with a heat insulating resin which is a second heat insulating member, for example, a foam heat insulating urethane resin 19. That is, the upper end portions 53a and 53b of the side surfaces 5a and 5b of the vacuum heat insulating panel 5 are bent inwardly from the upper end portions 53a and 53b of the vacuum heat insulating panel 5 having a height higher than the side surfaces 7a and 7b of the aluminum plate 7. The upper end portions 53a and 53b are covered with the foam heat insulating urethane resin 19 over the entire edge.
[0024]
Even in such a configuration, the upper opening 53 is somewhat narrower than in the previous embodiment, but the upper end portions 53a and 53b of the vacuum heat insulating panel 5 are bent inward, and the periphery of the upper end portions 53a and 53b is foamed and insulated. Since the heat leakage can be reduced by covering with the urethane resin 19, the same effect as the previous embodiment can be obtained.
[0025]
Although the processing is slightly complicated, the above-described bent portions of the vacuum heat insulating panel 5 may naturally be provided on both the side end portions 51a and 51b and the upper end portions 53a and 53b.
<Example>
As described above, the following verification was performed in order to compare the superiority in power consumption of a cold storage unit with an aluminum heat transfer plate configured in a U-shape with a conventional box type cold storage unit. .
[0026]
As a rough specification of the cold storage used, the internal dimensions are 140 mm * 340 mm * 215 mm, the internal capacity is about 10 liters, weight 5.6 kg, 55w type Peltier device, comparative verification of power consumption went.
[0027]
FIG. 7 is a diagram showing changes in the internal temperature and power consumption over time between the cold / hot storage according to the present invention in which the aluminum heat transfer plate is configured in a U-shape and the conventional box-type cold / hot storage. is there. Further, FIG. 8 is a diagram showing a change with time of the power consumption integrated value of the U-shaped cold storage unit and the conventional box-type cold storage unit.
[0028]
As shown in FIG. 7, the rise in the internal temperature is faster in the box-type cold storage, and the power consumption increases accordingly, at the time when about 1 hour has elapsed after turning on the SW, A predetermined target temperature is reached, and then power consumption is stabilized at about 30 W. On the other hand, in the U-shaped refrigerated storage, the temperature reaches a predetermined target temperature after about 1 hour and 20 minutes, and then the power consumption is stabilized at about 15 W. As shown in FIG. 8, the integrated value of power consumption is the same power consumption until about 1 hour after turning on the SW, but after that, the conventional box-type refrigerated storage unit consumes about 30W. As it settles down, the integrated value of the power consumption of the U-shaped cold storage room increases. However, as the power consumption of the U-shaped cold storage is stabilized at about 15 W, the integrated value of power consumption reverses when about 2 hours have passed, and thereafter, The opening of the integrated value increases. That is, the longer the U-shaped cold / hot storage is used, the smaller the integrated value of the power consumption of the U-shaped cold / hot storage compared to the conventional box-type cold / hot storage. As a result, the superiority in power consumption of the U-shaped cold storage cabinet was verified.
[0029]
As mentioned above, although the cold storage warehouse of this invention has been demonstrated with reference to an accompanying drawing, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the thought of this invention. . For example, the heat transfer plate 7 may be in a shape that can be bent, and the vacuum heat insulating panel 5 may also have a shape that forms a box when combined with the heat transfer plate.
[0030]
【The invention's effect】
As described above, according to the cold storage room according to claim 1 of the present invention, a U-shaped heat transfer member having electrothermal conversion means, a bottom surface, and two side surfaces at longitudinal ends of the bottom surface. A U-shaped first heat-insulating member having a bottom surface and two side surfaces orthogonal to the two side surfaces of the heat conductive member and higher than the two side surfaces; A housing having a second heat insulating member covering the outer surface of the heat member and the end of the first heat insulating member, and a lid on the upper portion, and accommodating the electrothermal conversion means and the first and second heat insulating members. Since the electrothermal conversion means is disposed on one of the two side surfaces of the heat transfer member, the heat transfer member can be manufactured only by bending, and a conventional press die is not required. Cost reduction can be achieved. Further, by using different heat insulating members, it is possible to further reduce costs by keeping the use of expensive heat insulating members to the minimum necessary while maintaining the heat insulating effect.
[0031]
Moreover, according to the cold storage warehouse of Claim 2, in the said Claim 1, a 1st heat insulation member is formed with a vacuum heat insulation panel, a 2nd heat insulation member is formed with heat insulation resin, and vacuum insulation. The edge of the panel is bent inward and covered with heat-insulating resin, so the use of expensive vacuum heat-insulating panels is kept to a minimum, and the vacuum is the part where heat leakage is large due to contact with the outside air The heat insulation can be further enhanced by squeezing the end of the heat insulation panel inward and covering the periphery of this end with a heat insulation resin.
[0032]
Further, according to the cold storage room according to the third aspect, in the first or second aspect, the refrigerant can be detachably attached to the inner side of the one side surface of the heat transfer member in which the electrothermal conversion means is disposed on the outer side. Since the supporting member to be supported is provided, when the cold storage room is used as a cooling device, the refrigerant is attached to the supporting member, so that the refrigerant accumulates heat even after the cooling device is turned off. Compared to those without, the cooling time can be extended.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration excluding a lid portion of a cold storage cabinet according to the present invention.
2A and 2B are cross-sectional views of a refrigerator / warmware according to the present invention, in which FIG. 2A is a longitudinal cross-sectional view, and FIG.
FIG. 3 is a top view schematically showing a structure of a side end portion of the vacuum heat insulating panel.
FIG. 4 is a diagram schematically showing the structure of a vacuum heat insulation panel itself.
FIG. 5 is a schematic view showing a state where a water tank is attached to a support member made of an aluminum plate.
FIG. 6 is a side view schematically showing the structure of the upper end portion of the vacuum heat insulating panel.
FIG. 7 is a diagram showing changes in the internal temperature and power consumption of the cold / hot storage according to the present invention and a conventional cold / hot storage with time.
FIG. 8 is a diagram showing a change with time of the power consumption integrated value of the cold / hot storage according to the present invention and the conventional cold / hot storage;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cold storage 3 Case 5 Vacuum insulation panel 5a Side surface 5c Bottom surface 5f Laminating film material 5g Core material 7 Aluminum plate 7a Side surface 7c Bottom surface 9 Peltier element 11 Support member 13 Temperature sensor 15 Radiation fin 17 Fan 19 Foam heat insulation urethane resin 20 Water Tank 20a Protrusion 51a Side end 51b Side end 53a Upper end 53b Upper end

Claims (3)

In a cold / hot warehouse that cools or overheats the inside of the warehouse via a heat conductive member,
Electrothermal conversion means;
A U-shaped heat transfer member having a bottom surface and two side surfaces at a longitudinal end of the bottom surface;
The heat-conductive member is placed, a U-shaped first heat-insulating member having a bottom surface and two side surfaces orthogonal to the two side surfaces of the heat-conductive member and higher than the two side surfaces;
A second heat insulating member that covers an outer surface of the heat conductive member and an end of the first heat insulating member;
It has a lid at the top, and includes a housing for accommodating the electrothermal conversion means and the first and second heat insulating members,
The electric heat conversion means is disposed outside one side surface of the two side surfaces of the heat transfer member. The first heat insulating member is formed of a vacuum heat insulating panel, the second heat insulating member is formed of a heat insulating resin, and an end portion of the vacuum heat insulating panel is bent inward and covered with the heat insulating resin. The cold / hot warehouse of Claim 1 characterized by the above-mentioned. 3. The support member for detachably supporting the refrigerant is disposed inside one side surface of the heat transfer member in which the electrothermal conversion means is disposed. Cold storage room.

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