JPS6110144Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a small thermostat.

In recent years, electronic coolers using electronic cooling elements such as thermomodules have become widely used. This thermomodule can lower the temperature of the cooling part as the temperature of the heat generating part is lowered. Therefore, the cooling ability of the cooler can be increased as the heat dissipation is improved and the temperature of the heat generating portion is lowered.

However, when the case is made smaller, it becomes difficult to sufficiently dissipate heat from the heat generating part of the thermo module, and for this reason, conventional small portable electronic coolers have a reduced cooling capacity of the thermo module, making it difficult to adequately dissipate heat from the heat generating part of the thermo module. The disadvantage was that it could not be cooled to a temperature of

The present invention was made with the aim of eliminating the above-mentioned conventional drawbacks, and while the cooling surface of the electronic cooling element is fixed in contact with the inner tank, the outer periphery of the case is formed of a metal member with good heat conduction, and the outer periphery of the case is The heat dissipation area is increased by thermally bonding the heat generating surface of the electronic cooling element to the
The object of the present invention is to provide a small-sized constant temperature bath that increases the cooling capacity of the electronic cooling element.

The present invention will be described in detail below based on one embodiment of the accompanying drawings.

In FIG. 1, a lid 2 of a small thermostatic chamber 1 is made of synthetic resin, for example, a plastic material.
The case 3 has an upper part 3a and a bottom part 3c made of a plastic member, and a middle part 3b made of a metal member having good thermal conductivity, such as aluminum. and,
A storage inner tank 4 for cooling is installed inside the case 3. This storage inner tank 4 is made of, for example, an aluminum member. And the upper part 3a of the case 3,
The middle part 3b, the bottom part 3c, the inner tank 4, etc. are assembled as shown in the drawings. A plate 5 made of a metal member such as aluminum is closely fixed to the bottom 4a of the inner storage tank 4.

The electronic cooling elements 6 and 7 are, for example, thermomodules, and the cooling surfaces 6a and 7a are in close contact with the plate 5, respectively, and the heat generating parts 6b and 7b are in close contact with the upper surfaces of mounting bases 8 and 9, respectively, formed of metal members. ing. and,
The bottom surfaces of these mounts 8 and 9 are closely fixed to the heat sink 10 with screws 11 and 12, respectively. Further, the heat sink 10 is fixed to the inner surface of the middle part 3b of the case 3 via a flange 10a by spot welding or the like, and is thermally joined to the middle part 3b of the case. A heat insulating member 1 is provided inside the lid body 2 and the case 3.
3 and 14 are enclosed.

The upper part 3a, middle part 3b, inner tank 4, etc. of the case 3 are fixed and integrated. It goes without saying that the lid 2 is attached to the case upper part 3c via a hinge 22 (FIG. 2) so as to be openable and closable. Further, the bottom portion 3c is removably fixed to the heat sink 10 with screws 21 via four pillars 20 provided at the four corners. A battery 16 is disposed in a space 15 between the heat sink 10 and the case bottom 3c. This battery 16 is for supplying a predetermined amount of power to each of the thermomodules, and is, for example, a rechargeable battery such as a nickel cadmium battery.
This battery 16 is connected to a switch 17 and an indicator lamp 18 (Fig. 2) attached to the lower part of one side of the middle part 3b of the case.
It is connected to the thermomodules 6 and 7 via etc. In addition, this battery 16 is connected to an indicator lamp 18.
Charging connection terminal 19 (second
(Fig.) is also connected.

Now, when the switch 17 is turned on, the indicator lamp 18 lights up, and at the same time, power is supplied from the battery 16 to the thermo modules 6, 7, and the temperature of the cooling surfaces 6a, 7a of these thermo modules 6, 7 gradually decreases. In response to this, the inner tank 4 is gradually cooled via the plate 5. On the other hand, thermo module 6,
The temperature of the heat generating surfaces 6b and 7b of 7 gradually rises.
The heat generated by these heat generating surfaces 6b and 7b is generated by the mounting bases 8 and 9.
The heat from the heat sink 10 is further conducted to the middle part 3b of the case. The surface of the case middle part 3b is in direct contact with the outside air, and the surface area is several times larger than that of the heat sink 10. Therefore, the heat generated by the thermo modules 6 and 7 is transferred to the heat sink 1.
0, the heat is steadily radiated from the surface of the case 3b, and the heat generating surfaces 6 of these thermo modules 6 and 7
b and 7b are maintained at approximately the outside temperature. on the other hand,
There is a space 1 between the case bottom 3c and the heat sink 10.
5, and since the case bottom 3c is made of a thermally insulating material, there is almost no temperature rise, and therefore it can be installed in any location. For example, if the outside temperature is 35℃,
The inner tank 4 can be cooled to about 15 to 20°C.

Note that the battery 16 can supply power for about 10 hours. Charging is performed by connecting to a car battery (not shown) or a predetermined power source (not shown) through the connection terminal 19.

In this embodiment, a case has been described in which the middle part of the case is made of a metal member, but the present invention is not limited to this, and the bottom part may also be made of a metal member.

Furthermore, a fan for heat radiation may be attached between the bottom of the case and the heat sink, and a predetermined number of holes may be bored at predetermined positions in the case to further enhance the heat radiation effect.

As explained above, according to the present invention, by using the case as a heat dissipation plate, the heat generated from the heat generating surface of the electronic cooling element can be radiated extremely effectively, thereby creating a compact cooler with excellent cooling capacity. In addition, since there is almost no heat dissipation from the bottom of the case, it can be placed anywhere without choosing the installation location, making it convenient for carrying portable lunch boxes or storing fishing bait, etc. It also has excellent effects such as being able to be used as a small constant temperature bath for physical and chemical experiments.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a small constant temperature bath according to the present invention, and FIG. 2 is a partially cutaway side view of FIG. 1. 2...Lid body, 3...Case, 4...Inner tank, 5...
...Metal plate, 6,7...Thermo module, 8,9
... Mounting base, 10 ... Heat sink, 16 ... Battery, 1
7...Switch, 18...Display lamp, 19...
Charging connection terminal.

Claims (1)

[Claim for Utility Model Registration] The inside of the case, whose bottom part is made of a heat insulating material and whose outer part is made of a metal plate, is divided into two spaces by a heat sink, and an inner tank is placed in the upper space. a small constant temperature bath, in which the cooling surface of the electronic cooling element is closely fixed to the bottom of the inner tank, and the heat generating surface of the electronic cooling element is thermally connected to the outer part via a heat sink. .