JP2005098674A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cool an object to be cooled by simple equipment. <P>SOLUTION: In this cooling device 1 for cooling a house top and the like by utilizing the vaporization heat obtained by supplying the water to the house top and a veranda, the cooling device 1 comprises a temperature sensitive water absorbing/discharging polymer 5 as hydro-gel which is insoluble in water, includes a large amount of water, absorbs the water at a temperature lower than a predetermined specific temperature-sensitive point, does not absorbs the water at more than the temperature-sensitive point, and discharges the absorbed water, and a case 3 which accommodates the temperature-sensitive water absorbing/discharging polymer 5, and has a water supply hole 7b for supplying the water to the temperature-sensitive water absorbing/discharging polymer 5 and an opening 11a as a water discharge hole for discharging the water discharged from the temperature sensitive water absorbing/discharging polymer 5 to the cooled object. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooling device that supplies water to an object to be cooled (an object to be cooled) and cools the object using heat of vaporization.

  Human rich society is supported by energy consumption. On the other hand, there is now a crisis about global environment and resources such as global warming, and the need for energy saving is increasing in our daily lives.

  Most of the energy is obtained by burning fossil fuels such as oil and coal, and as a result, CO2 (carbon dioxide) is discharged into the atmosphere. The CO2 concentration rises due to a large consumption of energy, and the Earth is warming due to the progress of the greenhouse effect that traps the heat that the Earth should release into space.

  Factors contributing to the increase in energy consumption include the increase in the number of electric appliances such as air conditioners and refrigerators, and the increase in the use of private cars, which have higher energy savings than railways and buses.

  While electrical products and private cars can make life easier, the increase consumes a lot of energy and leads to environmental destruction such as global warming.

  In this way, energy usage is closely related to our lifestyle, so there is a need to switch to an energy-saving lifestyle.

  To that end, it is necessary to change the lifestyle pattern to one that emits less CO2 and other greenhouse gases, but even if there is a growing awareness of global warming, there are still few people who are willing to work on energy conservation.

  This is because there are limits to reforming consumers' consciousness and encouraging energy saving while household appliances that consume large amounts of energy are being supplied to the market one after another. For this reason, there has been a demand for a proposal of a technique that can save energy even if the consumer is not particularly conscious of it, and that can be easily implemented even when consciously taking energy saving measures.

Therefore, for example, in the construction field, greening awareness has been improved, especially in urban areas. The number of cases where watering systems are installed is increasing. In the automotive field, sunshades equipped with a heat reflecting film have been developed. However, there is a problem that the apparatus itself becomes large and the cooling effect more than expected cannot be obtained.
JP 7-224119 A JP-A-8-100010

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cooling device that can cool a target object by using heat of vaporization with simple equipment and without consuming electric power. Doing so will contribute to energy conservation.

  Therefore, the cooling device of the present invention employs the following means.

  That is, the cooling device of the present invention is a cooling device that supplies water to an object to be cooled and cools the object using heat of vaporization, and does not dissolve in water at a temperature lower than a predetermined temperature set in advance. It absorbs water and becomes gelatinous and impervious to water, but above the predetermined temperature does not absorb water and drains water that has already been absorbed, and stores such a hydrogel, and A water supply hole for supplying water to the hydrogel and a case having a water discharge hole for discharging the water discharged from the hydrogel to the object to be cooled.

  As a pre-stage for using the cooling device of the present invention, a case where a sufficient amount of water is contained in the hydrogel and the hydrogel containing the water is contained in an object to be cooled is applied. In this way, when the temperature of the object reaches a predetermined temperature at which the hydrogel discharges water, the object that the hydrogel in the case has discharged up to that time and the object to be cooled from the water discharge hole of the case Since water flows through the object, the object to be cooled is cooled by the water. That is, when water is supplied to the object to be cooled such as the roof, the veranda, or the like, the heat (vaporization heat) is lost when water is vaporized at the temperature of the roof or the veranda, so that the objects are cooled.

  It is preferable that a large number of the water supply holes are formed on the upper surface of the case. The water discharge hole may be formed on the lower surface of the case.

  In this case, since there are many water supply holes on the upper surface of the case, the water supplied from the upper surface of the case spreads evenly over the entire area of the hydrogel.

  Different types of hydrogels having different predetermined temperatures may be arranged in a plurality of multilayer structures and stored in the case. Different types of hydrogels having different predetermined temperatures refer to hydrogels having different temperatures at which water is discharged, for example, in the range of 15 to 60 ° C.

  Since the predetermined temperature is a branch point between absorption and discharge of water, the predetermined temperature may be referred to as a temperature sensitive point for convenience.

  For example, in the range of 20 ° C. to 40 ° C., temperature points are set at intervals of 5 ° C., and the temperature sensitive point is 20 ° C. hydrogel, 25 ° C. hydrogel,... 40 ° C. hydrogel, etc. If different types of hydrogels with different temperature points are stored in the same case in a multi-layer structure, the water contained in the hydrogel discharged from the case will gradually increase as the temperature rises ( In this case, since the hydrogels are discharged sequentially from the low temperature sensitive point (at intervals of 5 ° C.) and not discharged at a time, it is possible to prevent wasteful use of water contained in the hydrogel.

  The five hydrogels having different predetermined temperatures are preferably stacked from the lower layer in the order of low temperature.

By doing so, the water contained in the temperature-sensitive water-absorbing polymer discharged from the case is discharged little by little (in this case, at intervals of 5 ° C.) as the temperature rises, and at the same temperature. This is because the amount of water contained in the temperature-sensitive water-absorbing / draining polymer can be suppressed because it is not discharged at once. Also, since the temperature-sensitive water-absorbing polymer with a low temperature point is in the lower layer, the temperature rises and the water discharged from the temperature-sensitive water-absorbing polymer with a high temperature point is the temperature of the lower layer with a low temperature point Even if it reaches the water-absorbing / water-absorbing polymer, the water-absorbing / water-absorbing polymer with a low temperature point does not absorb water when the temperature is higher than the temperature-sensitive point. Therefore, water discharged from the upper temperature-sensitive water-absorbing and draining polymer having a high temperature-sensitive point is not absorbed. Therefore, the object to be cooled will not be cooled due to lack of water.
In addition, when the five hydrogels having different predetermined temperatures are stacked from the lower layer in order of low temperature, it is preferable to provide a dedicated water absorption path for efficiently performing water absorption exclusively in the hydrogel of each layer. A hydrogel with a high temperature point only absorbs water and does not drain until the outside temperature reaches the temperature point, so if there is a dedicated water absorption path for each layer, the hydrogel in each layer is independent of the outside temperature. This is because sufficient water can be distributed.

  Water discharged from the temperature-sensitive water-absorbing / draining polymer is discharged from the water discharge hole to the outside of the case.

  Furthermore, it is preferable that the thickness of the hydrogel having the predetermined temperature corresponding to the highest temperature zone in the summer is statistically the largest in the time zone to be used. By doing so, it becomes possible to sufficiently supply water in the temperature range that requires the most cooling, so that the object to be cooled can be sufficiently cooled.

The upper surface of the case may be an arch-shaped ceiling plate or a plurality of ceiling plates.

  Since the ceiling plate has an arch shape, even if a person steps on the cooling device of the present invention, the frictional resistance becomes high, and it is difficult to slip. Also, if the ceiling plate is arched, the internal space of the case will be increased accordingly, so extra hydrogel can be put. As a result, the amount of water absorbed by the hydrogel can be increased, so that the amount of water supplied to the object to be cooled increases and the cooling efficiency of the object can be increased.

  It is also conceivable to form the case from a flexible material. Since the hydrogel itself is also flexible, it can be brought into close contact with the shape of the object, and the cooling efficiency is improved.

  It is also conceivable that the case has an outer peripheral wall extending downward from the outer peripheral edge of the lower surface, and the outer peripheral wall has a vent hole.

  By providing the air holes, air flows between the inside and the outside of the case. As a result, the environment in which water supplied to the object to be cooled is easily vaporized is prepared, and the heat of vaporization increases. For this reason, the temperature of the object to be cooled can be further lowered.

  Furthermore, the outer peripheral wall is connected to the outer peripheral wall with the inside and the outside of the case, and a drainage port for discharging the water in the case to the outside of the case is provided, so that it is discharged from the hydrogel and directed toward the object to be cooled. The drainage from the inside of the case of the flowing water to the outside can be enhanced. Without the drain, the water discharged from the hydrogel tends to be stored inside the case, but since there is a drain, the water from the hydrogel supplied to the object to be cooled is always cold water. And the cooling effect is enhanced.

  In addition, by having reinforcing ribs on the upper surface of the case, the strength of the upper surface of the case is increased. Therefore, if the same strength is ensured, the thickness of the upper surface of the case can be reduced, so that the internal space of the case increases and the volume of the hydrogel stored in the case can be increased. As a result, the amount of water absorbed by the hydrogel can be increased, and the amount of water supplied to the object to be cooled increases. Therefore, the cooling efficiency of the object can be increased.

  Furthermore, it can be considered that the hydrogel having the lowest predetermined temperature (temperature sensitive point) is arranged on the uppermost part of the hydrogel having the multilayer structure housed in a case. Here, the predetermined temperature of the hydrogel having the lowest predetermined temperature is 15 ° C. in the above example. And it is not so much that the temperature of the outside air is 15 ° C. or less in summer, even in cold summer.

  On the other hand, in winter, there are very few cases where the outside air is higher than 15 ° C. Therefore, it rains or sprinkles in the winter, and the uppermost hydrogel absorbs water, becomes gelatinous and cannot pass water. That is, the said hydrogel comes to exhibit the function as a waterproof sheet. The water absorbed by the uppermost hydrogel does not flow to the lower hydrogel. Therefore, the lower layer hydrogel is in a dry state than the uppermost hydrogel. Therefore, the cooling device according to the present invention functions as an adiabatic heat retaining device in winter.

The hydrogel having a predetermined temperature of 15 ° C. always drains the contained water when the outside air temperature is 15 ° C. or higher. Therefore, if, for example, it rains or sprinkles water on the cooling device of the present invention when the outside air temperature is 15 ° C. or higher, the raindrops or water droplets from the water sprinkle will pass through the uppermost hydrogel. Flowing into. For this reason, if the outside air temperature at this time is higher than the temperature sensing point of the uppermost hydrogel but lower than the temperature sensing point of the lowermost hydrogel, the drainage from the uppermost hydrogel is lower than that. To be absorbed by the hydrogel. As described above, when the outside air temperature becomes higher than the temperature sensing point of the lower layer hydrogel, the water contained in the lower layer hydrogel is discharged. Therefore, if such an action is performed in summer, the house is cooled because heat is taken away from the rooftop or veranda where this apparatus is spread.
Therefore, according to the present invention, the state of the multi-layered hydrogel can be automatically changed between summer and winter.

  On the other hand, if it rains in the winter or water is sprayed with the vents provided in the case open, the hydrogel stored in the case absorbs the water via the vents. However, this is not the case if the vent is closed.

  For this reason, it is preferable to provide a lid that automatically opens and closes the vent as necessary. As the opening / closing lid, for example, a lid configured to close as a result of a loss of weight balance and an unbalance is conceivable. For example, preparing a case lid portion that is hollow and has a water absorption hole for drawing water inside, and placing the hydrogel having the lowest temperature sensitive point at a location corresponding to the water absorption hole in the case lid portion, The hydrogel having the lowest temperature sensitive point absorbs water through the water absorption holes, and the weight balance of the open / close lid is lost when the hydrogel absorbs water. As a result, an open / close lid that is closed is mentioned. . If the closing operation is performed in winter, water does not flow to the hydrogel in the case via the vent hole, so that the hydrogel in the case maintains a dry state. As a result, the cooling device of the present invention has a function as a heat insulation and heat retention device. And, if the temperature point of the hydrogel having the lowest temperature point is 15 ° C. as described above, the outside air temperature in summer is usually not lower than this, so it is stored in the opening / closing lid. The hydrogel having the lowest temperature point is in a state that does not contain moisture, and the opening / closing lid opens in the opposite direction.

  Further, if a plurality of the cooling devices described above are provided and the cases are connected to each other via a detachable hinge portion, the hinge portion functions as a connector for connecting the cases to each other, so that a plurality of cases can be superimposed. Therefore, it becomes convenient to carry. In addition, the hinge portion increases flexibility in a state where a plurality of cases are connected. For this reason, even if it is a three-dimensional object whose outer shape is not planar, it will be deformed in accordance with its form, so that such a three-dimensional object can be cooled.

Therefore, the cooling device of the present invention can cool an object for cooling with simple equipment.
Further, the cooling device of the present invention effectively functions as a heat insulation and heat retaining function in winter. Therefore, if such a cooling device of the present invention is mounted on a rooftop or a veranda, it is possible to provide an ideal house that is energy saving, cool in summer, and warm in winter.

(Example 1)
Embodiment 1 will be described with reference to FIGS.

  FIG. 1 is an external view of a cooling device 1 according to the present invention. 2 is a partially omitted vertical sectional view of FIG.

  The cooling device 1 is a cooling device that supplies water to an object to be cooled (an object to be cooled) and cools the object using heat of vaporization.

  The cooling device 1 includes a case 3 and a hydrogel 5 accommodated in the case 3.

  First, the hydrogel 5 will be described.

  In general, a hydrogel is a soft structure composed of a network structure of a water-soluble polymer and water, and specifically includes a superabsorbent polymer used for paper diapers, food gelatin, agar, and the like.

  As such structures, hydrogels using carboxymethylcellulose cross-linked products, starch-acrylonitrile graft copolymers, polyvinyl alcohol, polyacrylates, and the like as raw materials are widely known.

  A temperature-sensitive water-absorbing polymer can be exemplified as the hydrogel.

  A temperature-sensitive water-absorbing polymer contains a large amount of water that does not dissolve in water and absorbs water at a temperature lower than a predetermined temperature set in advance, but already absorbs water without absorbing water above the predetermined temperature. It is a resin that has the property of draining water. The predetermined temperature acts as if the temperature is a branch point between absorption and discharge of water, that is, the predetermined temperature, and the predetermined temperature is referred to as a temperature sensitive point.

  For details of the temperature-sensitive water-absorbing polymer, for example, the above-mentioned JP-A-7-224119 (N-isopropylacrylamide, sodium acrylate and diacetone acrylamide were polymerized in an aqueous solution in the presence of a crosslinking agent to obtain a water-absorbing resin), JP-A-8-100010 (N-isopropylacrylamide, diacetone acrylamide, acrylic acid, and acidic clay are dissolved and dispersed in water, polymerized by adding an initiator under a nitrogen gas stream, and temperature-sensitive absorption containing inorganic particles. Examples thereof include resins obtained by polymerizing and cross-linking N-alkylacrylamides such as N-isopropylacrylamide as a main component monomer.

  In this type of temperature-sensitive water-absorbing and draining polymer, a temperature-sensitive point can be arbitrarily set by appropriately selecting a monomer copolymerizable with N-alkylacrylamide.

  The case 3 is made of a strong synthetic resin such as FRP (fiber reinforced plastic) (see FIGS. 1 and 2). The case 3 includes a ceiling portion (case upper surface) 7 having a plurality of arch-shaped ceiling plates 7 a having a gentle curvature, front and rear side wall portions 9 hanging from the periphery of the ceiling portion 7, and a bottom plate portion 11. .

  The case 3 has an outer peripheral wall 13 that extends downward from the outer peripheral edge of the lower surface thereof in a skirt shape.

  The ceiling portion 7 has a water supply hole 7 b for supplying water to the hydrogel (temperature-sensitive water-absorbing and draining polymer) 5 housed in the case 3 at the boundary portion between the ceiling plates 7 a. In this specification, the longitudinal direction of the cooling device 1 shown in FIG. 1 is referred to as the front-rear direction, and the width direction of the cooling device 1 is referred to as the left-right direction.

  An opening 11 a for accommodating the hydrogel 5 in the case 3 is formed in the center portion of the bottom plate portion 11. In other words, it can be said that the bottom plate portion 11 having a large opening 11a in the center is formed by the protruding plate 11a1 extending somewhat inwardly from the inner surface lower portion of the left and right side wall portions 9. It is also conceivable to attach a stitch lid to the opening 11a to effectively prevent the dropout.

  The opening 11a of the bottom plate portion 11 also functions as a water discharge hole for discharging water discharged from the hydrogel to an object to be cooled.

  Further, in the first embodiment, FIG. 1 shows a ceiling portion 7 including five ceiling plates 7a, and the cooling device 1 having such a ceiling portion 7 is illustrated as one block (one block). The cooling device 1 having the ceiling portion 7 composed of only one ceiling plate 7a may be regarded as one block. In FIGS. 1 and 2, the length dimension L is 350 mm (the width dimension w of the ceiling board 7a is 70 mm, and there are five ceiling boards 7a), the width dimension W is 140 mm, and the height dimension H is as follows. A block having a height of 30 mm and a bottom plate height h (see FIG. 2) of 5 to 15 mm is illustrated.

  For example, a large number of cooling devices 1 can be arranged on the rooftop or veranda of a house during a hot summer season. As a method of arrangement, the cooling devices 1 may be scattered on the rooftop or a veranda, or the cooling devices 1 may be arranged adjacent to each other without a gap.

  As a previous step of using the cooling device 1, sufficient water is contained in the hydrogel 5. And it arrange | positions to the object (object) 8 to be cooled, such as a rooftop or a veranda (refer FIG. 9). If it does in this way, when the temperature of the said rooftop or a veranda reaches the temperature sensitive point of the hydrogel 5, the water absorbed until then will be discharged | emitted from the hydrogel 5. FIG. As a result, water flows from the opening 11a of the bottom plate portion 11 which is the water discharge hole of the case 3 to the rooftop or the veranda, so that the rooftop or the veranda is cooled by the water. That is, when water is supplied to the rooftop or the veranda, heat (vaporization heat) is lost when water is vaporized at the temperature of the rooftop or the vendor, so that the rooftop or the veranda is cooled.

  Further, since the ceiling portion 7 has a plurality of arch-shaped ceiling plates 7a, the frictional resistance is high even when a person steps on the cooling device 1, so that even if the bottom plate portion 11 is wet, it does not slip. If the ceiling plate is arched, the shape of the upper portion of the internal space of the case also exhibits an arch shape accordingly, so that the volume of the internal space is increased and extra hydrogel can be added. As a result, the amount of water absorbed by the hydrogel can be increased, and the amount of water supplied to the object to be cooled increases, so that the cooling efficiency of the object to be cooled can be increased.

  FIG. 3 shows a case where a plurality of temperature-sensitive water-absorbing and draining polymers having different temperature-sensitive points are stored in the case in a multilayer structure.

  In FIG. 3, the temperature sensing point is a temperature-sensitive water-absorbing polymer with a temperature sensitive point of 15 ° C., a temperature-sensitive water-absorbing polymer with a temperature of 20 ° C., and a temperature-sensitive water-absorbing polymer with a temperature of 40 ° C. The temperature-sensitive water-absorbing polymers 51 to 55 having different layers are stacked from the lower layer in the order of low temperature to form a multilayer structure, and the temperature-sensitive water-absorbing polymer 5 is stored in the case 3 as an example.

  In addition, when five temperature-sensitive water-absorbing polymers 51 to 55 having different temperature-sensitive points are stacked from the lower layer in order of low temperature, a dedicated water-absorbing material for efficiently performing water absorption exclusively in the temperature-sensitive water-absorbing polymer of each layer. A path is provided (not shown). Since the temperature-sensitive water-absorbing polymer with a high temperature point only absorbs water and does not drain until the outside temperature reaches the temperature point, each layer has a dedicated water absorption channel, so that each layer is independent of the outside temperature. Sufficient water can be spread over the temperature-sensitive water-absorbing and draining polymers 51 to 55. As the dedicated water-absorbing path, the temperature-sensitive water-absorbing polymers 51 to 55 are subdivided for each layer, and arranged in a state where a gap is left between the subdivided temperature-sensitive water-absorbing polymers. A water-absorbing water channel with a horizontal line between them is considered.

  If it does in this way, water will be absorbed in the temperature-sensitive water-absorbing / removing polymers 51 to 55 of each layer by, for example, watering at night, and from the case 3 on the next day, it will be included in the temperature-sensitive water-absorbing / draining polymer. The water contained in the temperature-sensitive water-absorbing polymer 5 is discharged little by little (in this case, at intervals of 5 ° C.), but is not discharged at the same temperature at a time. Can be reduced.

  In addition, since the temperature-sensitive water-absorbing polymer with a lower temperature point is in the lower layer, the temperature rises, and the water discharged from the temperature-sensitive water-absorbing polymer with a higher temperature point is the temperature sensitivity of the lower layer with the lower temperature point Even if it reaches the water-absorbing / water-absorbing polymer, the water-absorbing / water-absorbing polymer with a low temperature point does not absorb water when the temperature is higher than the temperature-sensitive point. Therefore, water discharged from the upper temperature-sensitive water-absorbing and draining polymer having a high temperature-sensitive point is not absorbed.

  Therefore, there is no case where the object is not cooled due to an insufficient amount of water supplied to the object to be cooled. For example, in the summer time zone, the thickness of the hydrogel (temperature-sensitive water-absorbing polymer) having the predetermined temperature corresponding to the temperature zone most frequently in the summer is statistically made thickest. Is preferred. By doing so, it becomes possible to sufficiently supply water in the temperature range that requires the most cooling, so that the object to be cooled can be sufficiently cooled.

(Example 2)
A second embodiment will be described with reference to FIGS. 4 and 5.

The difference between the cooling device according to the second embodiment and the cooling device 1 according to the first embodiment is that
1) The case 3 is formed of a flexible material. 2) One block (cooling device 1) is connected in plural via the hinge part 3. 3) One block has one arch shape on the ceiling part 7. 4) A large number of water supply holes 7b are formed in the ceiling portion 7. 4) Ventilation holes on the outer peripheral wall of the case 3 for improving air flow between the inside and outside of the case (see arrows in FIG. 6). 12 and a drain hole 14 for discharging water in the case to the outside of the case. Both the vent hole 12 and the drain hole 14 are holes formed in the skirt 13 extending in the horizontal direction.

  A cooling device formed by connecting a plurality of blocks (a plurality of cooling devices 1) disclosed in the second embodiment with a hinge portion 10 is indicated by reference numeral 1A.

  In cooling device 1A, what connected a plurality of blocks in the width direction is shown.

  FIG. 5 shows a state in which the temperature-sensitive water-absorbing / draining polymer is filled in the case 3 without a gap.

In Example 2, since the hydrogel itself is also flexible, the cooling device 1A can be brought into close contact with the shape of the object to be cooled. In addition, since each block moves freely according to the shape of the object by the hinge portion 10, even if the shape of the object to be cooled is three-dimensional, the block comes into close contact with the three-dimensional shape. Efficiency is good.

  For example, if the cooling device 1A is placed on the vehicle body, a plurality of blocks come into close contact with the vehicle body via the hinge portion 10 in accordance with the three-dimensional shape of the vehicle body. For this reason, the temperature rise in the vehicle in the summer can be extremely effectively prevented. In this case, the portability can be improved even if the hydrogel 5 contains water by forming the block thinly.

  Since many water supply holes are formed in the ceiling plate 7a, the water supplied from the ceiling portion 7 of the case 3 is absorbed into the interior of the hydrogel. Therefore, it becomes possible to cool the object to be cooled evenly.

  Moreover, you may make it connect a some block in mesh shape by providing the hinge part 10 in the four directions of the cooling device 1. FIG.

  If the cases are connected via the hinge portion 10, the hinge portion 10 functions as a connector for connecting the cases to each other, so that a plurality of cases 3 can be superimposed. Therefore, it becomes convenient to carry. Moreover, since it becomes flexible in the state which connected the some case 3 with the hinge part 10, even if it is a three-dimensional object whose outer shape is not planar, it deform | transforms according to the form. As a result, a three-dimensional object such as an automobile can be cooled.

  It is also conceivable that the case 3 has an outer peripheral wall extending downward from the outer peripheral edge of the lower surface, and a vent hole is formed in the outer peripheral wall.

  By providing the air holes, air flows between the inside and the outside of the case. As a result, the environment in which water supplied to the object to be cooled is easily vaporized is prepared, and the heat of vaporization increases. For this reason, the temperature of the object to be cooled can be further lowered.

  Furthermore, the outer peripheral wall is connected to the outer peripheral wall with the inside and the outside of the case, and a drainage hole for discharging the water in the case to the outside of the case is provided, so that it is discharged from the hydrogel and directed toward the object to be cooled. The drainage from the inside of the case of the flowing water to the outside can be enhanced. Without the drainage hole, the water discharged from the hydrogel is likely to be stored inside the case, but since there is a drainage hole, the water from the hydrogel supplied toward the object to be cooled is always cold water. become. For this reason, the cooling effect increases.

  In addition, by having reinforcing ribs on the upper surface of the case, the strength of the upper surface of the case is increased. Therefore, if the same strength is ensured, the thickness of the upper surface of the case can be reduced, so that the internal space of the case is increased accordingly, and the volume of the hydrogel stored in the case can be increased. As a result, the amount of water absorbed by the hydrogel can be increased, so that the amount of water supplied to the object to be cooled increases. Therefore, the cooling efficiency of the object can be increased.

(Application 1)
As an application example 1 of the first embodiment and the second embodiment, as shown in FIG. 7, a plurality of reinforcing ribs 17 may be provided on the inner surface of the ceiling board 7a. By providing the reinforcing rib, the strength of the ceiling plate 7a is increased. Therefore, if the same strength is ensured, the thickness of the ceiling plate 7a can be reduced, so that the internal space of the case 3 is increased, and the volume of the hydrogel 5 accommodated in the case 3 can be increased. As a result, the amount of water absorbed by the hydrogel 5 can be increased, so that the amount of water supplied to the object to be cooled increases. Therefore, the cooling efficiency of the object can be increased.

(Application example 2)
Further, as an application example of the second embodiment, as shown in FIG. 8, a heat insulating material 18 may be filled in a joint 16 that is a space portion located above the hinge portion 10.

  By doing in this way, the heat insulation effect can be heightened. In this case, the vent hole 12 is closed on the outer peripheral wall of the case 3, but there is no problem because the vent hole 12 is also formed in the other part of the outer peripheral wall of the case 3.

(Example 3)
A third embodiment will be described with reference to FIGS.

As the cooling device according to the third embodiment is different from the cooling device 1A according to the second embodiment, as can be seen from FIG. 10 and FIG.
1) The hydrogel 51 having the lowest temperature sensing point is disposed at the top of the multi-layered hydrogel 5. 2) An automatic opening / closing lid (hereinafter referred to as an opening / closing lid) 20 is provided in the vent hole. The shape of the vent hole is different because the opening / closing lid 20 is provided in the pore. 4) Of the water that has entered the case 3 from the water supply hole 7b of the case 3, excess water is drained.

  A cooling device formed by connecting a plurality of blocks (a plurality of cooling devices) disclosed in the third embodiment with hinge portions 10 is denoted by reference numeral 1B.

  The vent 12A to which the opening / closing lid 20 is attached has an L-shaped cross section as shown in FIGS. An opening / closing lid 20 is installed in the upper opening of the vent 12A.

  The opening / closing lid 20 is a rotating lid having a fulcrum at the center like a seesaw, and is automatically closed when the weight becomes unbalanced. For this purpose, the open / close lid 20 has a hollow case lid portion 22, and the inner space has a temperature sensitive point among the hydrogels 51, 52, 53, 54, and 55 that constitute the multilayered hydrogel 5. The hydrogel 51 having the lowest is placed. The opening / closing lid 20 is also provided with a hydrogel 55 having the highest temperature sensitive point in order to improve the heat insulation of the opening / closing lid 20. A hydrogel having a higher temperature sensitive point than the hydrogel 55 may be substituted for the hydrogel 55. And arrangement | positioning and ratio in the case cover part 22 of the hydrogel 55 * 51 are defined so that the weight balance of the opening-and-closing lid 20 may collapse | crumble and the opening-and-closing lid 20 may close when the hydrogel 51 absorbs water.

  Specifically, the case lid 22 is divided into two internal spaces with the fulcrum as a boundary, and one of the cases is filled with a hydrogel 55 having a high temperature sensitive point. On the other hand, a hydrogel 51 having a low temperature sensitive point and a high hydrogel 55 are filled in a state of being divided in two in the height direction of the case lid portion 22. In addition, a plurality of holes 23 are formed in a portion corresponding to the hydrogel 51 having a low temperature sensing point on the upper surface of the case lid portion 22. The hole 23 functions as a water absorption hole and guides the water flowing into the opening / closing lid 20 to the hydrogel 51 having a low temperature sensing point.

  In addition, in this specification, the location where the hydrogel 51 with a low temperature sensitive point is accommodated in the internal space of the case lid portion 22 is referred to as a water absorption hole corresponding location. The water flowing into the opening / closing lid 20 is included in the hydrogel 51 that is located at the top of the hydrogel 5 and has the lowest temperature sensing point among the water that has entered the case 3 from the water supply hole 7b of the case 3. It is the extra water W that travels over the surface without any problems. The water W flows to the opening / closing lid 20 via the drain hole 31 (see FIGS. 10 and 11) of the case 3.

  As described above, the hydrogel 51 having the lowest temperature sensitive point is disposed on the opening / closing lid 20 at the location corresponding to the water absorption holes in the case lid portion 22. The temperature sensitive point of the hydrogel 51 is 15 ° C. In winter, the outside air temperature is generally lower than 15 ° C. Accordingly, when water from rain or water spray flows into the hydrogel 51 via the water absorption holes 23 in winter, the hydrogel 51 absorbs water. Further, the opening / closing lid 20 is configured such that water does not flow through the hydrogel 55. Therefore, the hydrogel 55 does not contain water even if the hydrogel 51 absorbs water. As a result, the weight balance of the opening / closing lid 20 is lost, the opening / closing lid 20 is closed, and the vent hole 12A is closed.

  And the outdoor temperature in summer is not usually lower than 15 ° C., which is the temperature point of the hydrogel 51 having the lowest temperature point. For this reason, the hydrogel 51 stored in the opening / closing lid 20 and having the lowest predetermined temperature spits out even if it contains water in the summer. Therefore, the hydrogel 51 is in a state not containing moisture, and as a result, the opening / closing lid 20 is opened and the vent hole 12 is opened.

  As described above, in the cooling device 1 according to Example 3, the hydrogel 51 having the lowest temperature sensing point is disposed on the top of the hydrogel 5 having a multilayer structure housed in the case 3, and The point is 15 ° C. as described above. The fact that the temperature of the outside air is 15 ° C. or lower in the summer is not so much even in the cold summer, and on the contrary, in the winter, the outside air is much less than 15 ° C. Therefore, when the uppermost hydrogel 51 absorbs water and becomes gelatinous due to rain or watering in winter, the hydrogel 51 functions as a waterproof sheet. . For this reason, the water absorbed by the uppermost hydrogel 51 does not flow to the lower hydrogels 55, 54, 53, and 52. Therefore, the hydrogels 55, 54, 53, and 52 below the uppermost hydrogel 51 are in a dry state. Accordingly, the cooling device 1 according to the present embodiment functions as an adiabatic heat insulation device in winter, so that heat is not taken away from the rooftop or veranda where the device 1 is spread. For this reason, it becomes a house with high heat retention.

  The hydrogel 51 having a predetermined temperature of 15 ° C. always drains the contained water when the outside air temperature is 15 ° C. or higher. Therefore, if, for example, water is sprayed to the cooling device 1 when the outside air temperature is 15 ° C. or higher, the water sprayed is passed through the uppermost hydrogel 51 to form the lower hydrogel 55, 54, 53, 52. Flowing into. For this reason, if the outside air temperature at this time is higher than the temperature sensing point of the uppermost hydrogel 51 but lower than the temperature sensing point of the lower layer hydrogel 55, 54, 53, 52, the uppermost hydrogel 51. The waste water from the water is absorbed by the lower hydrogels 55, 54, 53, and 52. As described above, when the outside air temperature becomes higher than the temperature sensing point of the lower hydrogel 55, 54, 53, 52, the water contained in the lower hydrogel 55, 54, 53, 52 is contained. Is discharged. As described above, if such an action is performed in the summer, heat is taken away from the rooftop or veranda where the apparatus 1 is spread, and the house is cooled.

  Thus, in the present invention, the state of the multi-layered hydrogel 5 can be automatically changed between summer and winter.

  The hydrogel 55 having the highest temperature sensing point or the hydrogel having a higher temperature sensing point is provided to improve the heat insulating property of the opening / closing lid 20. It is not essential.

(Application 1)
As an application example of the third embodiment, as shown in FIG. 12, the open / close lid may have four blades in a windmill state. Of course, the number is not limited to four and may be other numbers. In short, any form may be used as long as it is an open / close lid that closes when the weight becomes unbalanced due to moisture absorption.

(Application example 2)
The hydrogel does not necessarily have a multilayer structure, and may have a two-layer structure in which the hydrogel 51 having the lowest temperature point is placed on the hydrogel 55 having the highest temperature point.

  Note that the cooling device of the present invention is not limited to the above-described illustrated examples, and it is needless to say that various modifications can be made without departing from the scope of the present invention.

  The cooling device of the present invention is placed on a table taken out on the beach in summer or laid around a pool, other than being placed on the rooftop or veranda of a house in the hot summer season, or over a car. I think that.

1 is a partially cutaway perspective view of a cooling device according to Embodiment 1. FIG. FIG. 2 is a partially omitted cross-sectional view of FIG. 1. FIG. 3 is a view corresponding to FIG. 2, showing a state in which five temperature-sensitive water-absorbing / draining polymers having different temperature-sensitive points are stacked from the lower layer in order of low temperature to form a multilayer structure. FIG. 5 is a partially cutaway perspective view of a cooling device according to a second embodiment. FIG. 5 is a partially omitted cross-sectional view of FIG. 4. It is a principal part enlarged view of FIG. 6 is a diagram illustrating an application example 1 of the first embodiment or the second embodiment. FIG. 6 is a diagram illustrating an application example 2 of the first embodiment or the second embodiment. FIG. It is a perspective view which shows the example of application. FIG. 9 is a partially omitted cross-sectional view of a cooling device according to a third embodiment, showing a state where an opening / closing lid is open. FIG. 6 is a partially omitted cross-sectional view of a cooling device according to a third embodiment, showing a state where an open / close lid is closed. 10 is a diagram illustrating an application example of Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling device 1A Cooling device 1B Cooling device 2 Object to be cooled 3 Case 5 Hydrogel 51, 52, 53, 54, 55 Temperature-sensitive water-absorbing polymer 7 Ceiling part 7a Ceiling plate 7b Water supply hole 9 Side wall part 10 Hinge part 11 Bottom plate 11a opening (water discharge hole)
11a1 Protruding plate 12 Ventilation hole 13 Outer peripheral wall 14 Drainage hole 16 Joint 17 Reinforcing rib 18 Heat insulating material 20 Opening and closing lid 22 Case lid portion 23

Claims (15)

A cooling device that supplies water to an object to be cooled and cools the object using heat of vaporization,
Hydrogel that absorbs water without dissolving in water at a temperature lower than a predetermined temperature set in advance, but discharges water that has already been absorbed without absorbing water at the predetermined temperature or higher, and
The hydrogel is housed and includes a water supply hole for supplying water to the hydrogel and a case having a water discharge hole for discharging water discharged from the hydrogel to the object to be cooled. Cooling system.   The cooling device according to claim 1, wherein a number of the water supply holes are formed on an upper surface of the case.   The cooling device according to claim 1 or 2, wherein different types of hydrogels having different predetermined temperatures are arranged in a multilayer structure and stored in the case.   The cooling device according to claim 3, wherein five hydrogels having different predetermined temperatures are stacked from a lower layer in order of low temperature.   5. The cooling device according to claim 4, wherein the thickness of the hydrogel having the predetermined temperature corresponding to the highest temperature zone in the summer is statistically set to be thickest in the time zone to be used. .   The cooling device according to claim 4, wherein the upper surface of the case is an arch-shaped ceiling plate or a plurality of ceiling plates.   The cooling device according to claim 1, wherein the case is formed of a flexible material.   The cooling device according to claim 1, wherein the case has an outer peripheral wall extending downward from an outer peripheral edge of the lower surface, and the outer peripheral wall has a vent hole.   The case has an outer peripheral wall extending downward from an outer peripheral edge of the lower surface, and the outer peripheral wall has a drain outlet for communicating the inside and the outside of the case and discharging water in the case to the outside of the case. The cooling device according to any one of claims 1 to 8.   The cooling device according to claim 1, wherein the upper surface of the case has a reinforcing rib.   The cooling device according to any one of claims 8 to 10, wherein a hydrogel having a lowest predetermined temperature is arranged at an uppermost part of the hydrogel having a multilayer structure.   The cooling device according to any one of claims 8 to 11, wherein the ventilation hole has an opening / closing lid that closes when the weight is unbalanced.   The opening / closing lid is hollow and has a case lid portion with a water absorption hole for drawing water inside, and the hydrogel having the lowest predetermined temperature is arranged at a position corresponding to the water absorption hole in the case lid portion. The cooling device according to claim 12, wherein the cooling device is provided. The case has a drainage hole for draining excess water not included in the hydrogel out of the water entering the case from the water supply hole of the case, and the drainage drained from the drainage hole is, The cooling device according to claim 13, wherein the hydrogel having the lowest predetermined temperature contained in the opening / closing lid absorbs water from a water absorption hole provided in the case lid.   A cooling device comprising a plurality of the cooling devices according to any one of claims 1 to 14, wherein the cases of the plurality of cooling devices are connected via hinges.

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