JPH09126616A - Handy cool box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a temperature in a stockroom at a constant temperature for a long time without storing water. SOLUTION: A handy cool box for maintaining the temperature of a stockroom at a constant temperature comprises a dry ice housing chamber 4 for housing dry ice 7, an opening and closing mechanism 9 by which a stockroom 8 communicates with the dry ice housing chamber 4 and the stock room 8 is isolated from the dry ice housing chamber 4 and an amorphous alloy 11 for detecting the temperature of the stockroom and supplying the cold air of the dry ice 7 to the stockroom 8 from the dry ice housing chamber 4 through the opening and closing mechanism 9 when the temperature of the stockroom 8 reaches a predetermined temperature T1 or higher. Further, the handy cool box further comprises an elastic member 12 for interrupting the entry of the cold air of the dry ice 7 to the strockroom 8 from the dry ice housing chamber 4 through the opening and closing mechanism 9 when the temperature of the stockroom 8 reaches a temperature not higher than a predetermined temperature T2 (T2<T1).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a handy cool box, particularly a shape memory alloy, to control the flow of dry ice cold into a refrigerator, and to keep the temperature inside the refrigerator constant for a long time without power supply. It is about a handy cool box.

[0002]

2. Description of the Related Art Handy cool boxes are widely used for fishing in summer and outdoor leisure. They are,
As the refrigerant, a gel-like substance which has been previously frozen in a freezer or ice is used. Occasionally, dry ice is used as a refrigerant.

[0003]

However, the frozen gel-like substance has a low cooling capacity, has no cooling air in half a day in summer, and has a disadvantage that the duration of the cooling air is too short for practical use.

[0004] When ice is used as a refrigerant, the ability to store cold air is higher than that of a gel-type refrigerant, but there is a drawback that ice melts and water accumulates in the refrigerator, so that anything that dislikes water cannot be added. .

Dry ice has a low temperature of -78 ° C.
When using dry ice, it is too cold to use, and the fish and drinks in the refrigerator freeze, and the temperature inside the refrigerator is extremely low, so it is easy for cold air to escape, the dry ice consumption increases, and the heat is kept for a long time. There was a drawback that can not be.

SUMMARY OF THE INVENTION An object of the present invention is to provide a handy cool box capable of keeping the inside of a refrigerator at an appropriate temperature for a long time without water being accumulated in the refrigerator. The purpose is.

[0007]

In order to solve the above-mentioned problems, the handy cool box of the present invention is a handy cool box for keeping the temperature inside the refrigerator constant, in which a refrigerant compartment for storing dry ice, and a compartment and a refrigerant. An open / close mechanism that cuts off the communication with the cold storage and a temperature inside the cold storage are detected, and when the temperature inside the cold storage reaches a predetermined temperature T1 or higher, cold air of dry ice is caused to flow from the refrigerant cold storage into the cold storage via the open / close mechanism. A shape memory alloy and an elastic material that blocks cold air inflow of dry ice from the refrigerant storage to the inside of the refrigerator via the opening / closing mechanism when the inside of the refrigerator becomes equal to or lower than a predetermined temperature T2 (T2 <T1), The feature is that the inside temperature is kept constant.

[0008] Dry ice has a low temperature of -78 ° C, has a sublimation latent heat twice that of ice, has a specific gravity of 1.56, and takes up less space than other refrigerants. The opening / closing mechanism opens and closes, and the inflow of cool air of dry ice into the refrigerator is controlled, so that the temperature inside the refrigerator is kept constant.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of the basic structure of the present invention,
2 is a sectional view taken along line AA of FIG. 1 and 2, a cool box 1 includes a main body 2 conventionally used as a heat storage box and a lid 3 that can be opened and closed, and further includes a heat insulating material housed in the main body 2 so as to be freely taken out. And a dry ice storage 4. The dry ice storage 4 includes a dry ice storage main body 5 and a closed lid 6, and has a structure such that the dry ice 7 packed in the dry ice storage 4 does not rapidly sublime even when the lid 3 is opened and closed. ing.

An opening / closing mechanism 9 for communicating or shutting off the dry ice storage main body 5 for storing the dry ice 7 and the inside 8 of the refrigerator is provided on the inside of the dry ice storage main body 5 inside the refrigerator 8. That is, a cool air outlet 10 is formed in the dry ice storage main body 5, and an opening / closing plate 13 is opened and closed by a shape memory alloy 11 and an elastic material 12 such as a spring.
The flow of the cold air of the dry ice 7 into and out of the refrigerator 8 through the outlet 10 is controlled.

That is, when the temperature of the interior 8 rises and the temperature of the interior 8 becomes equal to or higher than T1, the shape memory alloy 11 changes to a predetermined shape. The shape change of the shape memory alloy 11 resists the elastic force of the elastic material 12 such as a spring, and the opening / closing plate 13
1 is opened as shown in FIG. 1, and cool air of the dry ice 7 passes through the outlet 10 from the dry ice storage
To the side to lower the temperature of the interior 8. When the temperature of the refrigerator 8 drops and the temperature of the refrigerator 8 becomes T2 or less, the refrigerator 8
The shape memory alloy 11 which detects the temperature of the above loses strong spring property, and the elastic force of the elastic material 12 such as a spring causes the opening and closing plate 13 to close. Thereby, the inside 8 of the cool air of the dry ice 7
Inflow to the side is blocked. By this repetition, the temperature of the interior 8 is kept constant.

Note that the opening / closing mechanism 9 shown in FIG. 1 shows a principle configuration, and a structure in which the opening / closing mechanism 9 does not protrude toward the inside of the refrigerator 8 will be described with reference to FIG. Here, the outline of the shape memory alloy 11 will be described.
By performing the heat treatment with the i-Ti alloy, a shape memory effect is exhibited. The shape memory effect means that when a shape is memorized at a predetermined temperature (austenite phase), if it is deformed at a temperature lower than the shape recovery temperature (martensite phase), it is restored to its original shape when heated to the shape recovery temperature. It is the characteristic of returning. The shape recovery temperature varies depending on the components, processing conditions and heat treatment conditions, and various temperatures are manufactured.

In the experiments of the present application, the shape recovery temperature was 10 ° C.
10 kg of fish at 25 ° C. is put in a refrigerator 8 in a cool box 1 having a volume of 26 liters, and the temperature in the refrigerator is 9 with 3 kg of dry ice 7 for 3 days.
° C.

FIG. 3 is an explanatory view of an embodiment of the opening / closing mechanism. FIG. 1A shows a state in which the opening / closing mechanism 9 is closed,
FIG. 2B shows a state in which the opening / closing mechanism 9 is open.

In (1) and (2) of FIG. 1, each edge of a base plate 15 provided at the cold air outlet 10 of the dry ice storage main body 5 has an appropriate height from the paper surface toward the front side. And a window 16 is provided as shown by the dotted line, and two L
Character-shaped stoppers 17 and 18 are fixed. At this time, the cool air outlet 10 of the dry ice storage main body 5 is formed in the shape of the window 16. A fan-shaped slide plate 20 that is rotatable about a shaft 19 is mounted on the base plate 15. Both ends of the slide plate 20 are provided with grooved rising portions 21 and 22. A spring 24 made of a shape memory alloy is attached to the groove of the rising portion 21, and a torsion spring 25 is attached to the groove of the rising portion 22. Shape memory alloy spring 24
Although not shown, a portion of the slide plate 20 that contacts the rising portion 21 of the slide plate 20 and a portion that contacts the bent portion of the base plate 15 are covered with a heat insulating tube.
In addition, heat conduction from the base plate 15 is blocked. In addition, the slide plate 20 has two holes corresponding to the windows 16.
Individual windows 23 are provided. A guide plate 27 prevents the slide plate 20 from floating above the base plate 15 when the slide plate 20 rotates.

The temperature of the interior 8 rises, and the temperature of the interior 8 becomes T
When it becomes 1 or more, the spring 24 of the shape memory alloy that detects the temperature of the inside 8 of the refrigerator changes to the original shape that has been processed in advance. This shape change of the shape memory alloy spring 24 has a strong spring property, and against the elastic force of the torsion spring 25, as shown in FIG.
The slide plate 20 is rotated from right to left in the drawing to a position where the rising portion 22 contacts the stopper 18. Thereby, the window 16 of the base plate 15 and the window 23 of the slide plate 20 overlap, and the opening / closing mechanism 9 is opened. The cool air of the dry ice 7 passes through the outlet 10 from the dry ice storage 4 side, flows into the inside 8 of the storage through the overlapping windows 16 and 23, and lowers the temperature of the inside 8 of the storage. At this time, the cool air flowing into the inside of the refrigerator 8 is prevented from directly falling on the shape memory alloy spring 24 by the rising portion 21 of the slide plate 20.

[0017] The temperature of the interior 8 drops, and the temperature of the interior 8 becomes T
2 or less, the shape memory alloy spring 24 loses strong spring properties, and the elastic force of the torsion spring 25 causes the rising portion 21 of the slide plate 20 to come into contact with the stopper 17 as shown in FIG. The slide plate 20 is rotated from left to right in the drawing. As a result, the window 16 of the base plate 15 is displaced from the window 23 of the slide plate 20, and the opening / closing mechanism 9 is closed.

As described above, according to the temperature of the inside 8 of the cool box 1, the cool air flowing from the outlet 10 to the inside of the inside 8 is controlled by the opening / closing mechanism 9, and the temperature of the inside 8 is kept constant.

FIG. 4 shows another embodiment of the opening / closing mechanism. FIG. 1A shows a state where the opening and closing mechanism 9 is closed, and FIG. 2B shows a state where the opening and closing mechanism 9 is opened.

3, the same components as those in FIG. 3 are denoted by the same reference numerals, and those in FIG. 4 have a structure in which windows 23 are provided on both sides of a slide plate 20 which rotates around a shaft 19. The opening / closing mechanism 9 is basically the same as the opening / closing mechanism 9 in FIG.

FIG. 5 is an explanatory view of another embodiment of the opening / closing mechanism. FIG. 1A shows a state where the opening and closing mechanism 9 is closed, and FIG. 2B shows a state where the opening and closing mechanism 9 is opened.

In (1) and (2) of FIG. 2, each end of the base plate 28 provided at the cold air outlet 10 of the dry ice storage main body 5 has an appropriate height from the paper surface to the front side. And a window 29 is provided as shown by the dotted line, and two L
Character-shaped stoppers 30, 31 are fixed. At this time, the cold air outlet 10 of the dry ice storage body 5 is formed in the shape of the window 29. Guide plates 32 and 33 are mounted on the base plate 28. A slide plate 39 fitted to the two guide plates 32, 33 is slidably mounted, and both ends of the slide plate 39 are provided with grooved rising portions 34, 35.
A spring 36 made of a shape memory alloy is provided in the groove of the rising portion 34.
The torsion spring 37 is attached to the groove of the rising portion 35. A portion where the shape memory alloy spring 36 comes into contact with the rising portion 34 of the slide plate 39 and a portion where it comes into contact with the bent portion of the base plate 28 are covered with a heat insulating tube (not shown). To block the heat conduction. A window 38 is formed in the slide plate 39 so as to correspond to the window 29.

The temperature of the interior 8 rises, and the temperature of the interior 8 becomes T
When it becomes 1 or more, the spring 36 of the shape memory alloy, which detects the temperature of the inside 8 of the refrigerator, changes to the original shape processed in advance. The shape change of the shape memory alloy spring 36 has a strong spring property, and against the elastic force of the torsion spring 37, as shown in FIG.
The slide plate 39 is moved from right to left in the drawing to a position where the rising portion 35 contacts the stopper 31. Thereby, the window 29 of the base plate 28 and the window 38 of the slide plate 39 overlap, and the opening / closing mechanism 9 is opened. The cool air of the dry ice 7 passes through the outlet 10 from the dry ice storage 4 and flows into the inside 8 of the refrigerator through the overlapping windows 29 and 38 to lower the temperature of the inside 8 of the refrigerator. At this time, the cool air flowing into the inside of the refrigerator 8 is prevented from directly falling on the shape memory alloy spring 36 by the rising portion 34 of the slide plate 39.

The temperature of the inside 8 drops and the temperature of the inside 8 becomes T
When it is less than 2, the shape memory alloy spring 36 loses its strong spring property, and the elastic force of the torsion spring 37 causes the rising portion 34 of the slide plate 39 to contact the stopper 30 as shown in FIG. The slide plate 39 is moved from left to right in the drawing. As a result, the window 29 of the base plate 28 and the window 38 of the slide plate 39 are displaced, and the opening / closing mechanism 9 is closed.

As described above, according to the temperature of the inside 8 of the cool box 1, the cool air flowing from the outlet 10 to the inside of the inside 8 is controlled by the opening / closing mechanism 9, and the temperature of the inside 8 is kept constant.

FIG. 6 shows another embodiment of the opening / closing mechanism. FIG. 1A shows a state where the opening and closing mechanism 9 is closed, and FIG. 2B shows a state where the opening and closing mechanism 9 is opened.

In the figure, the same parts as those in FIG. 5 are designated by the same reference numerals. In FIG. 6, the top 42 that moves along the shaft 41 and the slide plate 39 are fixed, and the opening / closing mechanism 9 is closed or opened by the movement of the top 42. A shape memory alloy coil 43 and a compression spring 44 are arranged on both sides of the top 42, and the shape of the shape memory alloy coil 43 changes depending on the temperature of the interior 8. The top 42 is moved by the shape change of the shape memory alloy coil 43 and the elastic force of the compression spring 44, and the slide plate 39 is also moved. The other mechanical parts are the same as those in FIG. 5, and therefore their explanations are omitted.

FIG. 7 shows a cross-sectional explanatory view of another embodiment of the opening / closing mechanism. In the figure, a slide groove 47 is provided in the case body 46, and two sliders 49 and 50 are slidably fitted in the slide groove 47 via a rod 48. A coil 51 of a shape memory alloy and a compression spring 52 are fitted on both sides of the two sliders 49 and 50, respectively, as shown in FIG.

The side wall 53 which constitutes the case body 46,
54, holes 55, 56 communicating with the slide groove 47 are formed, and these two holes 55, 56 are formed in the slider 50.
It is designed to communicate or be cut off by the movement of. A plurality of holes 57 are further formed on the side wall 53 on the side of the shape memory alloy coil 51, and the shape memory alloy coil 51 can detect the temperature of the inside 8 through the plurality of holes 57. It is like this. Reference numerals 58 and 59 denote heat insulating materials, and a coil 51 made of a shape memory alloy from the case body 46 side.
It is designed to prevent heat conduction.

The shape of the shape memory alloy coil 51 changes depending on the temperature of the interior 8. This shape memory alloy coil 5
The two sliders 49 and 50 are moved by the shape change of 1 and the elastic force of the compression spring 52. Inside 8 of shape memory alloy coil 51 and compression spring 52
Since the change due to the temperature is the same as that of the opening / closing mechanism 9 described above, the description thereof will be omitted.

The side wall 54 is arranged at the portion 10 of the cool air outlet of the dry ice storage main body 5, and the hole 56 of the side wall 54 and the shape of the outlet 10 of the cool air and their positions are aligned. Needless to say.

If the case main body 46 is made vertical and the compression spring 52 is replaced by the two sliders 49, 50 as weights, it can be used as the vertical opening / closing mechanism 9.

[0033]

As described above, according to the present invention, it is possible to maintain a constant temperature inside the refrigerator for a long time without power supply, without water remaining in the refrigerator. By installing a dry ice storage box with an opening and closing mechanism in a commercially available cool box, it becomes a versatile cool box that can be stored very easily for a long period of time, not only for general use but also for emergency use which is extremely effective in case of disaster It can also be used as a cool box.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a basic configuration of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view of an embodiment of an opening / closing mechanism.

FIG. 4 is an explanatory view of another embodiment of the opening / closing mechanism.

FIG. 5 is an explanatory view of another embodiment of the opening / closing mechanism.

FIG. 6 is an explanatory view of another embodiment of the opening / closing mechanism.

FIG. 7 is an explanatory view of another embodiment of the opening / closing mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cool box 2 Main body 3 Lid 4 Dry ice storage 5 Dry ice storage 6 Lid 7 Dry ice 8 Inside 9 Opening / closing mechanism 10 Air outlet 11 Shape memory alloy 12 Elastic material 13 Opening / closing plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshimitsu Onoue Yoshimitsu Onoue 2-18-20 Komaoka, Tsurumi-ku, Yokohama-shi, Kanagawa Nitto Hatsujo Co., Ltd. No. 14 (72) Inventor Yamato Tomiyo 39, 1111 Kashio-cho, Totsuka-ku, Yokohama-shi, Kanagawa

Claims (1)

[Claims] 1. A handy cool box for keeping the temperature inside the refrigerator constant, a refrigerant chamber for storing dry ice, an opening / closing mechanism for disconnecting communication between the inside and the refrigerant chamber, and an inside temperature for detecting the inside temperature, A shape memory alloy that allows the cold air of dry ice to flow from the refrigerator to the inside of the refrigerator through the opening / closing mechanism when the temperature becomes equal to or higher than the predetermined temperature T1, and the temperature inside the refrigerator is equal to or lower than the predetermined temperature T2 (T2 <T1). A handy cool box, characterized in that it has an elastic material that blocks the inflow of cold air of dry ice from the refrigerator to the inside of the refrigerator via the opening / closing mechanism, and keeps the inside temperature at a constant temperature.