JPH0744365U - Heat storage unit for latent heat storage type heating equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the supercooling phenomenon of the heat storage unit used in latent heat storage type heating tools. A heat storage unit 4 in which a latent heat storage body 2 in which a latent heat storage material 8 is sealed in a bag body 9 and an electric heater 3 are fixed to an integrated structure and the electric heat heater 3 heats the latent heat storage body 3 to store heat. By providing the part 15 that is harder to heat than the part of the temperature switch 7 that measures the degree of heat storage, in the main part of the latent heat storage body 2 that is heated by the electric heater 3, The latent heat storage material 8 of the portion 15 that is difficult to heat is less than the latent heat storage material 8 of the portion where the temperature switch 7 is provided, when the temperature switch 7 is activated, the latent heat storage material 8 is not completely melted, The crystal 16 is left as a crystal nucleus of recrystallization, whereby the latent heat storage material 8 reliably radiates heat without causing a supercooling phenomenon.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a latent heat storage type nap mat used for long-distance transportation vehicles and a heat storage unit used for other latent heat storage type heating tools.

[0002]

[Prior art]

 In the latent heat storage unit used for conventional heat storage nap mats and other heating equipment such as heating, the electric heater that heats the heat storage body contacts the heat storage body that stores heat by phase change as uniformly as possible. The heat storage body is heated uniformly and quickly. Furthermore, when the heat storage of the heat storage body is completed, the temperature switch provided in the part that can properly measure the temperature of the heat storage body automatically shuts off the electric circuit by stopping the electric circuit when the heat storage body reaches a predetermined temperature. Has become.

[0003]

[Problems to be solved by the device]

 When the heat storage material is heated to store heat, if all the heat storage materials in the heat storage material undergo a uniform phase change (liquefaction) to a heat storage state, there will be no crystal nuclei for recrystallization during heat dissipation, resulting in a supercooling phenomenon. And the stored heat energy cannot be released (solidified).

[0004]

[Means for Solving the Problems]

 According to the present invention, in a heat storage unit in which a latent heat storage body in which a latent heat storage material is sealed in a bag and an electric heater are fixed to each other, and the electric heat heater heats the latent heat storage body to store heat, the electric heat heater is used. The above-mentioned problem is solved by providing a main portion of the latent heat storage body heated by means of a portion that is harder to heat than the portion of the temperature detecting means for measuring the degree of heat storage.

For the portion that is difficult to heat, it is preferable that the outer periphery of the electric heat heater portion is configured to be slightly smaller than the outer periphery of the latent heat storage body so that the outer periphery of the heat storage body is the portion that is difficult to heat. Also, for the part that is difficult to heat, the outer circumference of the electric heat heater part is made slightly smaller than the outer circumference of the latent heat storage body, and one side edge of the electric heat heater part is brought close to the outer edge of the heat storage part so that it overlaps. The outer periphery of the heat storage body, which is separated from the outer edge of the, may be a portion that is difficult to heat. Further, the portion that is difficult to heat may be a portion that is hard to be heated by the electric heater member by adhering the heat absorbing member to an appropriate position of the heat storage element that seals the latent heat storage element.

[0006]

[Action]

 The heat storage material that is harder to heat than the heat storage material of the heat storage body in the part where the temperature switch is provided, which is the part that is averagely heated by the electric heater, is completely heated when the temperature switch is activated. It does not dissolve, and the crystal remains as a crystal nucleus for recrystallization. This ensures that the heat storage material is recrystallized and radiates heat without causing a supercooling phenomenon.

[0007]

【Example】

 FIG. 1 shows an embodiment of the present invention, which is a longitudinal sectional view of an essential part of the present invention applied to the vehicle-mounted heat storage nap mat (1) shown in FIG.

The nap mat (1) is used in a vehicle for long-distance transportation, uses electric power generated during traveling while the vehicle is operating, and includes a latent heat storage body (2) and an electric heater (3). In the plurality of heat storage units (4), the generated electric power during running is converted into heat via the electric heater (3) and stored in the heat storage body (2), the vehicle is stopped, and the driver takes a nap. In doing so, the stored heat is used to keep warm. The present invention relates to a heat storage unit (4) used in plural in the nap mat (1).

The heat storage unit (4) of the nap mat (1) is placed between the upper and lower urethane foams (5) (5) for heat insulation and the electric heater (3) side down. It is sandwiched between.

Each heat storage unit (4) is equipped with a temperature fuse (6) for preventing abnormal heating and a thermostat type temperature switch (7) for detecting an appropriate heating temperature. It is provided in close contact with the surface of the heat storage body (2) in which the material (8) is housed in the flat bag body (9), on the side opposite to the side with which the electrothermal heater (3) is in close contact.

The temperature switch (7) is an average heating portion representing the temperature rise in the heat storage body (2) heated by the electric heater (3), for example, the center of the flat plane of the flat bag body (9). It is provided in the section.

The heat storage body (2) is obtained by impregnating a felt-made impregnated base material (10) with a latent heat storage material (8) (for example, a sodium sulfate-based heat storage material) dissolved therein and impermeable to the surroundings. It is sealed with a synthetic resin bag (9).

The electric heater (3) is an aluminum sheet having a silicone rubber insulation coating cord heater (11) folded back and meandering at a required interval, and the upper and lower surfaces of the cord heater (11) having adhesive inner surfaces. The sheet (12) is covered to form a sheet-shaped surface heating element.

The outer shape of the heat generating portion of the electric heater (3) having a surface heating element shape is made slightly smaller than the outer shape of the heat storage body (2), and the heat storage body (2) has an electric heater. When (3) is brought close to its one side edge and they are overlapped with each other, and they are integrally fixed together by a double-sided pressure-sensitive adhesive sheet (13), a slight gap (a) is formed between the other side edges.

When the outer shape of the electric heater (3) is determined so that the gap (a) is larger than half of the line pitch (b) of the cord heater (11), the space (2) between the heat storage bodies (2) is determined. The peripheral portion (14) at (a) becomes a portion (15) that is harder to heat than the portion heated by other portions of the electric heater (3).

As a result, the temperature switch (7) provided in the substantially central portion of the heat storage body (2) detects the predetermined temperature, and the heat storage material (7) in that portion is sufficiently melted to store heat. When heated, the part (15) of the peripheral part (14) that is difficult to heat is slightly insufficient in the degree of heating, so the crystal (16) remains in the latent heat storage material (7) of that part without melting. Undissolved part remains.

The undissolved remaining crystals (16) become crystal nuclei during heat dissipation, and as long as there are remaining undissolved crystals (16), the latent heat storage material (7) that has accumulated heat is a supercooling phenomenon. Does not happen.

The outer shape of the electric heater (3) is made slightly smaller than the outer shape of the heat storage body (2), and by overlapping the centers of both of them, a slight gap (a) is formed on the four circumferences. You may comprise the part which is hard to heat.

FIG. 2 shows another embodiment. The outer shape of the electric heater (3) is such that it can sufficiently heat the four circumferences of the heat storage body (2) to the same extent as the central portion. have.

A heat absorbing member (17) made of a material having a high heat absorbing property is attached to an appropriate place of the heat storage body (2). The heat absorbing member (17) is made of a material having a large specific heat such as metal, and the latent heat storage material (8) at the portion where the heat absorbing member (17) adheres has a higher heat absorption than the other portions. It forms part (15) that is hard to be absorbed and melted and hard to heat.

As a result, even when the latent heat storage material (8) in the central portion is melted and the temperature switch (7) is actuated, unmelted crystals (1 6) remains. The heat absorbing member (16) is not limited to metal, and it is preferable that the heat absorbing member (16) has a relatively high thermal conductivity and a large specific heat. For example, it may be placed in a sealed bag of water or other liquid.

[0022]

[Effect of device]

 According to the present invention, when the latent heat storage material stores heat, it is possible to reliably repeat the heat storage and the heat dissipation without causing a situation such as causing a supercooling phenomenon.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a nap heat storage mat showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part of a nap heat storage mat similar to FIG. 1 showing another embodiment of the present invention.

FIG. 3 is a perspective view showing an outline of a vehicle-mounted heat storage nap mat to which the present invention is applied, with a part of which is cut away.

[Explanation of symbols]

 (1) Nap mat (2) Latent heat type heat storage body (3) Electric heat heater (4) Heat storage unit (5) Urethane foam (6) Temperature fuse (7) Temperature switch (8) Latent heat storage material (9) Bag body (10) ) Impregnated base material (11) Cord heater (12) Aluminum sheet material (13) Double-sided adhesive sheet (14) Peripheral part (15) Difficult to heat (16) Crystal (17) Endothermic member (a) Gap (b) Wire Inter-pitch

Claims (4)

[Scope of utility model registration request] 1. A heat storage unit in which a latent heat storage material, in which a latent heat storage material is sealed in a bag body, and an electric heater are fixed to an integrated structure, and the electric heat heater heats the latent heat storage material to store heat. A heat storage unit for a latent heat storage type warming tool, characterized in that a part that is harder to heat than a part of a temperature detecting means for measuring the degree of heat storage is provided in a main part of the latent heat storage body. 2. The latent heat storage according to claim 1, wherein the portion that is difficult to heat is configured such that the outer circumference of the electric heat heater portion is slightly smaller than the outer circumference of the latent heat storage body, and the outer circumference of the heat storage body is the portion that is difficult to heat. Storage unit for a heating system. 3. The portion that is difficult to heat is configured such that the outer circumference of the electric heat heater portion is slightly smaller than the outer circumference of the latent heat storage body, and one side edge of the electric heat heater portion is brought close to the outer edge of the heat storage body to be overlapped. The heat storage unit for a latent heat storage type heater according to claim 1, wherein an outer periphery of the heat storage body separated from an outer edge of the electric heat heater portion is a portion which is difficult to heat. 4. A portion which is difficult to heat becomes a portion which is hard to be heated by the electric heater member by bringing a heat absorbing member into close contact with a proper place of a heat storage body in which a latent heat storage body is sealed. Item 1. A heat storage unit for a latent heat storage type heater according to Item 1.