Cleaning method and cleaning device

Abstract

The invention provides a cleaning method and a cleaning device capable of cleaning dirt of particles attached to a humidity control material. The present disclosure is a cleaning method capable of cleaning dirt of particles adhering to a humidity control material, characterized in that the cleaning method includes a cleaning step in which cleaning is performed using a second humidity control material having a lower equilibrium humidity than a first humidity control material contained in the humidity control material.

Description

Technical Field

[0001] The present disclosure relates to a cleaning method and a cleaning device for cleaning dirt of particles attached to a humidity-conditioning material. This application claims priority based on Japanese Patent Application No. 2022-100740 filed in Japan on June 23, 2022, and the contents thereof are incorporated herein by reference. Background Art

[0002] Various cleaning methods have been disclosed in the past.

[0003] For example, Patent Document 1 discloses a method for producing a silver-based antibacterial agent, and discloses washing with ammonia water in order to remove nitrate ions and silver nitrate remaining on the surface. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent No. 4203572 Summary of the invention Problem that the invention aims to solve

[0005] However, when a material such as a humidity control material that releases or absorbs moisture is immersed in water, the concentration difference between the inside and the outside causes the salt, which is a hygroscopic component, to dissolve into the water. Therefore, it cannot be cleaned by wet method. In dry cleaning by blowing air, etc., it is difficult to remove fine particles, and wet cleaning is required.

[0006] In view of the above-mentioned problems, the present invention provides a cleaning method and a cleaning device capable of cleaning dirt attached to particles of a humidity-conditioning material. Solutions for solving problems

[0007] In one aspect of the present disclosure, a cleaning method for cleaning dirt attached to particles of a humidity control material is provided, characterized in that the method comprises a cleaning step of using a second humidity control liquid having a lower equilibrium humidity than a first humidity control liquid contained in the humidity control material for cleaning. Effects of the Invention

[0008] As described above, according to the present disclosure, it is possible to provide a cleaning method and a cleaning device capable of cleaning dirt attached to particles of a humidity-conditioning material. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a process diagram showing the outline of the cleaning method of the present invention. Figure 2 It is a cross-sectional view schematically showing a humidity-conditioning material. Figure 3 It is a figure which shows schematically the humidity-controlling material. Figure 4 It is a cross-sectional view schematically showing a humidity-conditioning material. Figure 5 It is a cross-sectional view schematically showing a humidity-conditioning material. Figure 6 is a graph showing equilibrium humidity relative to temperature and absolute humidity. Figure 7 This is a diagram showing the humidity when the heat and water vapor of the outside air are absorbed in the total heat exchanger. Figure 8 This is a diagram showing the humidity when the heat and water vapor of the outside air are absorbed in the total heat exchanger. Fig. 9 It is a schematic diagram of the cleaning device of the present invention. DETAILED DESCRIPTION

[0010] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, the embodiments described below do not unduly limit the contents of the present disclosure described in the claims, and not all the configurations described in the embodiments are essential to the solutions of the present disclosure.

[0011] [Cleaning method] Figure 1 1 is a process diagram showing an overview of the cleaning method of the present invention. Figure 1 As shown, the cleaning method of the present disclosure is a method for cleaning dirt attached to particles of a humidity-controlling material, and includes a cleaning step S10.

[0012] The cleaning method disclosed in the present invention is to clean the dirt attached to the particles of the humidity-controlling material, and first of all, the humidity-controlling material is described. The humidity-controlling material adjusts the amount of moisture contained in the air. In addition, the humidity-controlling material has the characteristics of absorbing moisture when the surrounding humidity is relatively higher than the equilibrium humidity, and releasing moisture when the surrounding is dry. Unlike desiccants represented by type A silica gel and zeolite, since moisture absorption and release are repeated, if a balance is achieved between the two within the range of not exceeding the maximum amount of water vapor that can be maintained, the effect is exerted semi-permanently in principle. The composition of the humidity-controlling material is described in detail below.

[0013] Figure 2 Schematically shows a cross-sectional view of the humidity control material 1. The cleaning method disclosed in the present invention cleans the Figure 2 The stain X shown is attached to the particles of the humidity-conditioning material 1. Figure 2As shown, the humidity control material 1 includes: a water-absorbing material 2, which contains a resin and / or a clay mineral; and a humidity control liquid 3, which is a humidity control component that absorbs or releases moisture and has a humidity control function. The humidity control liquid 3 is impregnated in the water-absorbing material 2. Depending on the humidity of the environment in which it is placed, the humidity control material 1 absorbs moisture contained in the air of the place to absorb moisture, or releases moisture contained in the humidity control material 1 into the air to humidify. In addition, the humidity control liquid 3 can be impregnated not only in the water-absorbing material 2, but also in the carrier 5 that supports the humidity control material 1 (water-absorbing material 2). The carrier 5 will be described later.

[0014] The humidity-controlling material 1 may be in the form of powder, granules, or blocks, and may be used by supporting the resin on a ventilation substrate so as to be effectively in contact with air.

[0015] The water-absorbing material 2 has a function of holding the humidity-conditioning liquid 3. Since the water-absorbing material 2 holds the humidity-conditioning liquid 3, a humidity-conditioning material 1 having a high ratio of surface area to volume can be realized. Therefore, the speed of absorbing or releasing water can be increased. Therefore, a humidity-conditioning material 1 having a high humidity-conditioning speed can be obtained.

[0016] The water absorbing material 2 is used for the first humidity-conditioning liquid contained in the humidity-conditioning material 1 in the cleaning method of the present disclosure and the second humidity-conditioning liquid, which is a cleaning liquid for cleaning the humidity-conditioning material 1 .

[0017] The water-absorbing material 2 is preferably a water-absorbing resin (particles, powder). As a result, the water-absorbing material 2 can be appropriately impregnated with the humidity-conditioning liquid 3, and the humidity-conditioning effect can be further improved. As specific examples of water-absorbing resin materials, ionic resins and non-ionic resins are preferred. As ionic resins, alkali metal salts of polyacrylic acid, starch-acrylate graft polymers, etc. can be cited. As specific examples of alkali metal salts of polyacrylic acid, sodium polyacrylate, etc. can be cited. As non-ionic resins, vinyl acetate copolymers, maleic anhydride copolymers, polyvinyl alcohol, polyalkylene oxides, etc. can be cited.

[0018] The humidity control liquid 3 preferably contains at least one of a deliquescent substance that absorbs moisture in the air and deliquesces and a polyol. This can further enhance the humidity control effect.

[0019] Specific examples of polyols include at least one selected from the group consisting of glycerol, propylene glycol, butylene glycol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, triethylene glycol, and lactic acid, among which polyols having three or more hydroxyl groups such as glycerol are more preferably used. In addition, the polyol may constitute a dimer or a polymer.

[0020] As deliquescent substances, they are classified into salts and water-soluble organic substances. As specific examples of salts, for example, sodium formate, potassium formate, ammonium formate, sodium acetate, potassium acetate, lithium acetate, ammonium acetate, sodium lactate, potassium lactate, sodium benzoate, potassium benzoate, sodium propionate, potassium propionate, calcium chloride, lithium chloride, magnesium chloride, calcium chloride, lithium chloride, potassium chloride, sodium chloride, zinc chloride, aluminum chloride, lithium bromide, calcium bromide, potassium bromide, sodium hydroxide, sodium pyrrolidone carboxylate, potassium carbonate, calcium citrate, sodium citrate, potassium citrate, lithium citrate, etc. can be listed. These salts can contain only one or more than two. Among them, sodium formate, potassium formate, sodium acetate, potassium acetate, and potassium carbonate with more moisture per unit weight of moisture absorption and release are preferred. As specific examples of water-soluble organic substances, for example, sucrose, pullulan, glucose, xylene, fructose, mannitol, sorbitol and other sugars, citric acid and other carboxylic acids, amides such as urea can be listed.

[0021] The amount of the humidity-conditioning liquid 3 relative to the water-absorbing material 2 is preferably 1 part by weight or more and 1000 parts by weight or less relative to 100 parts by weight of the water-absorbing material. In this way, the amount of the water-absorbing material 2 and the humidity-conditioning liquid 3 is appropriate, and the humidity-conditioning function can be further improved. In addition, the water-absorbing material 2 is preferably in a powdery or granular form.

[0022] Figure 3 Schematic diagram of a humidity control material. Figure 3 As shown, the humidity-conditioning material 1 may also be supported on a carrier 5 .

[0023] Figure 4 FIG. 2 is a diagram schematically showing another form of the humidity-conditioning material 1, and is a cross-sectional view of a sheet in which a binder (carrier 5) is dispersed between water-absorbing bodies 4 and the humidity-conditioning material 1 is dispersed in the binder. Figure 4 As shown, the humidity control material 1 (water absorbing material 2) can also be carried on the carrier 5. In addition, the water absorbing body 4 can include the water absorbing material 2. Furthermore, the humidity control liquid 3 can also be present between the water absorbing material 2. In this way, the humidity control material 1 with a high ratio of surface area to volume can be realized, and the speed of absorption or release of water can be accelerated. In addition, the carrier 5 can also be impregnated with water.

[0024] In addition, it is preferred that the carrier 5 carrying the humidity-controlling material 1 is selected optimally according to the application. In the case of heat transfer as in a total heat exchanger, a metal material such as aluminum is preferred. In the case of humidity control and a large amount of moisture absorption and release capacity is desired, a raw material that wets and retains the humidity-controlling liquid 3 is preferred. In the latter case, for example, it is composed of hydrophilic fibers such as porous bodies, nonwoven fabrics, and woven fabrics. In particular, a material such as a nonwoven fabric with high water vapor permeability is preferred. In addition, the carrier 5 may also contain a binder.

[0025] The shape of the carrier 5 can be sheet-like, and can be formed into various shapes such as a flat plate, a pleated shape, or a honeycomb shape. For example, a sheet-like material is first formed into a shape such as a waveform (flute) by corrugation, and then bonded and integrated with a flat plate-like lining made of the same or different material as the sheet by an adhesive. In addition, the carrier 5 can also be flexible. The carrier 5 can be deformed. In other words, it can also be maintained in an arbitrary shape (bent shape, curved shape, etc.).

[0026] Figure 5 Schematically shows a cross-sectional view of the humidity-conditioning material 1. Figure 5 As shown, the humidity control material 1 may be carried on a carrier 5 and held on a water absorber 4, and a total heat exchanger or element (holding portion 50) described later may be provided. In this way, the surface in contact with air increases, and the humidity control function can be improved.

[0027] The water absorbing body 4 may include the water absorbing material 2. In addition, the water absorbing body 4 may be in a powdery, granular or flake form.

[0028] In addition, as the humidity-controlling material 1 , other than the above materials, B-type silica gel, a polymer adsorption material, etc. may be used.

[0029] Furthermore, "humidity control" means adjusting the relative humidity so as to make it close to a prescribed humidity band. Specifically, for example, when 50%RH is set as the prescribed relative humidity, when the relative humidity is higher than 50%RH, the humidity control material 1 absorbs moisture (hygroscopic), and when the relative humidity is lower than 50%RH, the humidity control material 1 releases moisture (dehumidification). Generally, the prescribed relative humidity band is related to the material and moisture content of the humidity control material 1. Specifically, for example, the prescribed relative humidity band is related to the moisture content in the humidity control liquid.

[0030] The cleaning method according to the present disclosure will be described in detail below. In the cleaning step S10, dirt X attached to particles of the humidity-conditioning material 1 is cleaned. The dirt X refers to dust, sand, sand dust, garbage, salt, and the like.

[0031] exist Figure 1 In the cleaning step S10 shown, cleaning is performed using a humidity-conditioning liquid having a lower equilibrium humidity than the humidity-conditioning liquid contained in the humidity-conditioning material. Hereinafter, the humidity-conditioning liquid contained in the humidity-conditioning material is referred to as the first humidity-conditioning liquid, and the humidity-conditioning liquid having a lower equilibrium humidity than the first humidity-conditioning liquid is referred to as the second humidity-conditioning liquid. In the washing step S10, washing is performed using the second humidity-conditioning liquid having a lower equilibrium humidity than the first humidity-conditioning liquid contained in the humidity-conditioning material.

[0032] The first humidity-conditioning liquid and the second humidity-conditioning liquid use the above-mentioned humidity-conditioning liquid. The first humidity-conditioning liquid has a higher equilibrium humidity than the second humidity-conditioning liquid. On the other hand, the second humidity-conditioning liquid has a lower equilibrium humidity than the first humidity-conditioning liquid.

[0033] When the dirt attached to the surface of the humidity control material is cleaned by wet cleaning, the water-soluble humidity control component dissolves toward the cleaning water in the cleaning water such as ordinary water, for example, the humidity control material in the element is reduced and the humidity control performance is reduced. Therefore, by cleaning with a second humidity control liquid having a lower equilibrium humidity than the first humidity control liquid contained in the humidity control material, the humidity control liquid (first humidity control liquid) of the humidity control material can be prevented from dissolving into the cleaning water (second humidity control liquid). Therefore, the dirt attached to the particles of the humidity control material can be cleaned.

[0034] Furthermore, by using a second humidity-controlling liquid having a lower equilibrium humidity than the first humidity-controlling liquid contained in the humidity-controlling material for cleaning, the salt contained in the second humidity-controlling liquid moves to the first humidity-controlling liquid, and the humidity-controlling function of the humidity-controlling material can be restored to its original state. Usually, heating is performed to restore the humidity-controlling function of the humidity-controlling material to its original state, but when the humidity-controlling material is heated, the equilibrium humidity of the humidity-controlling material does not drop sharply but gradually. That is, it takes time to restore the humidity-controlling function of the humidity-controlling material to its original state by heating. Therefore, by going through this cleaning step S10, the humidity-controlling function of the humidity-controlling material can be restored to its original state without adding steps such as heating and taking time.

[0035] As described above, the humidity control material is preferably in a gel state. In this way, the humidity control liquid (first humidity control liquid) of the humidity control material is more strongly retained, and thus it is possible to further prevent elution into the washing water (second humidity control liquid).

[0036] Figure 6 is a graph showing equilibrium humidity relative to temperature and absolute humidity. Figure 6 It is shown that the absolute humidity varies depending on the temperature. For example, the equilibrium humidity is different in summer and winter, and the humidity-conditioning component may be eluted to the washing water side depending on the conditions. Therefore, the equilibrium humidity of the second humidity-conditioning liquid is preferably 50% RH or less. This can further suppress the humidity-conditioning component from eluting to the washing water side, and can more reliably clean the dirt attached to the particles of the humidity-conditioning material.

[0037] In addition, in the cleaning step S10, it is preferred to use ultrasonic waves that can follow the frequency of the particle dirt, and use the filtered second humidity conditioning liquid to clean the humidity conditioning material. By using ultrasonic waves that can follow the frequency of the particle dirt, the dirt can be cleaned more reliably, and by using the filtered second humidity conditioning agent to clean the humidity conditioning agent, it is possible to clean with a cleaning liquid having a small amount of dirt without re-adhering the contamination, and cleaning can be performed efficiently.

[0038] Furthermore, when the humidity-controlling material is in a gel state, it is preferable that the frequency of the oscillator be selected to be a frequency that the gel particles cannot follow but the dirt particles can follow.

[0039] like Figure 1 As shown, the cleaning method of the present disclosure preferably includes a removing step S20. The removing step S20 is to remove the second humidity-conditioning liquid remaining in the holding part 50 holding the humidity-conditioning material after the cleaning step S10.

[0040] The humidity control material 1 is composed of Figure 3 , Figure 4 and Figure 5 The carrier 5 shown is supported in the manner and the element is held by the total heat exchanger described later. Therefore, the removal step S20 removes the second humidity-conditioning liquid remaining on them by blowing or applying vibration. The working air volume is preferably such that no liquid remains.

[0041] like Figure 1 As shown, the cleaning method of the present disclosure preferably includes a recovery step S30. Recovery step S30 After the humidity control material is cleaned, the excess water of the humidity control material is recovered. The excess water is the water absorbed (moisture absorption) by the humidity control material.

[0042] In addition, if Figure 1 As shown, the cleaning method of the present disclosure preferably has a regeneration step S40. The regeneration step S40 regenerates the humidity control material. In the regeneration step S40, the relative humidity of the surrounding air is lower than the equilibrium humidity of the humidity control material. For example, the regeneration step S40 is performed by passing dry air through the humidity control material or the element, or the total heat exchanger described later, or by heating the air, or by reducing the pressure.

[0043] It should be noted that in Figure 1 In the figure, the cleaning step S10, the recovery step S30, and the regeneration step S40 are shown as different steps, but these steps may be performed simultaneously.

[0044] The humidity control material is preferably held by a total heat exchanger. A total heat exchanger is an energy-saving device that exchanges and recovers total heat of air conditioning energy lost due to ventilation. In the past, silica gel and zeolite were used as materials held in a total heat exchanger, but a humidity control material is used in the cleaning method disclosed herein.

[0045] Figure 7 This is a diagram showing the humidity when the heat and water vapor of the outside air are absorbed in the total heat exchanger. Figure 8 The diagrams show the humidity when the heat and water vapor of the outside air are absorbed in the total heat exchanger. Both diagrams are examples of summer. Figure 7 As shown, when air is transported from the outside to the inside, the humidity-control material held in the total heat exchanger can absorb heat and water vapor from the outside air, and transport low-humidity air to the room at a lower temperature than the outside.

[0046] On the other hand, Figure 8As shown in FIG. 1 , when air is sent from indoors to outdoors, the heat and water vapor absorbed by the humidity-conditioning material held in the total heat exchanger are released to the outdoors. Figure 7 and Figure 8 The cycle shown in the figure can reduce the external air load by 80% by performing time-sharing operation, thus achieving ductless operation.

[0047] In the case of a total heat exchanger, it is important to strike a balance between the moisture absorption and release performance and the heat absorption and release performance (capacity, speed) of the humidity-control material.

[0048] In addition, since the total heat exchanger also needs to control the heat capacity, it is preferable to also consider the influence of cleaning when a latent heat storage material (heat storage material) is provided. The latent heat storage material is in a capsule and a non-water-soluble gel, and there is no influence because it is covered by the capsule. On the other hand, the latent heat storage material is in a water-soluble gel (heat storage gel), and a calculation formula for the diffusion of the humidity control component is required. In the cleaning step S10, it is necessary to clean at a temperature below the solidification temperature of the latent heat storage material.

[0049] As described above, according to the cleaning method according to the present disclosure, it is possible to clean the dirt attached to the particles of the humidity-conditioning material without eluting the humidity-conditioning component into the cleaning water.

[0050] [Cleaning device] The cleaning device 100 of the present disclosure is a device for cleaning dirt attached to particles of a humidity control material. Fig. 9 As shown, the cleaning device 100 of the present disclosure includes a storage unit 9 and a cleaning unit 10 .

[0051] The storage unit 9 stores a second humidity-conditioning liquid having a lower equilibrium humidity than the first humidity-conditioning liquid contained in the humidity-conditioning material. The first humidity-conditioning liquid and the second humidity-conditioning liquid are as described above. The storage unit 9 may be a tank or the like, but is not limited thereto as long as it can store the second humidity-conditioning liquid.

[0052] The cleaning unit 10 cleans the humidity-conditioning material using the second humidity-conditioning liquid stored in the storage unit 9. Examples of the cleaning unit 10 include a cleaning place, a barrel, and a space capable of cleaning the humidity-conditioning material. The cleaning unit 10 performs the above-mentioned cleaning step S10.

[0053] The cleaning device 100 of the present disclosure preferably includes a recovery unit 30, which recovers excess water of the humidity control material after cleaning the humidity control material. The recovery unit 30 can include a container or a tank that can store excess water, but is not limited to these as long as it can store excess water. The recovery unit 30 performs the above-mentioned recovery step S30.

[0054] The cleaning device 100 of the present disclosure preferably further includes a regeneration unit 40 for regenerating the humidity control material. The regeneration unit 40 may include a compressor, a blower, a heater, a decompressor, etc. for passing dry air or heated air, but is not limited to these as long as the relative humidity of the surrounding air can be lower than the equilibrium humidity of the humidity control material. The regeneration unit 40 performs the above-mentioned regeneration step S40.

[0055] The cleaning device 100 of the present disclosure preferably further comprises a removal unit 20, which removes the second humidity-conditioning liquid remaining in the holding unit 50 holding the humidity-conditioning material when cleaning the humidity-conditioning material. The removal unit 20 may include air blowing, etc., but is not limited thereto as long as it can remove the second humidity-conditioning liquid remaining in the holding unit 50 holding the humidity-conditioning material. As the holding unit 50, a total heat exchanger or an element may be cited. The removal unit 20 performs the above-mentioned removal step S20.

[0056] The cleaning device 100 involved in the present disclosure preferably further comprises: a filter unit 60, which filters the second humidity-conditioning liquid; and an ultrasonic cleaning unit 70, which uses ultrasonic waves whose amplitude is smaller than the particle size of the dirt particles to clean the humidity-conditioning material. The filter unit 60 can include a filter device, etc., as long as it can filter, and is not limited to these. In addition, the ultrasonic cleaning unit 70 can include an ultrasonic device with a vibrator. In addition, the cleaning liquid filtered in the filter unit 60 can also enter the storage unit 9.

[0057] As described above, according to the cleaning device 100 according to the present disclosure, the humidity-controlling component does not elute into the cleaning water, and dirt attached to particles of the humidity-controlling material can be cleaned.

[0058] In addition, as described above, each embodiment and each example of the present invention have been described in detail, but it is easy for a person skilled in the art to understand that various modifications can be made without substantially departing from the novel matters and effects of the present invention. Therefore, all such modifications are included in the scope of the present disclosure.

[0059] For example, a term that is described at least once with a different term in a broader sense or with the same meaning in the specification or drawings can be replaced with a different term at any position in the specification or drawings. In addition, the structure and operation of the cleaning method and the cleaning device are not limited to the contents described in the various embodiments and examples of the present disclosure, and various modifications can be implemented.

Claims

1. A method for cleaning dirt attached to particles of a humidity-conditioning material, characterized in that: A cleaning step is provided in which cleaning is performed using a second humidity-conditioning liquid having a lower equilibrium humidity than the first humidity-conditioning liquid contained in the humidity-conditioning material.

2. The cleaning method according to claim 1, characterized in that The equilibrium humidity of the second humidity-controlling liquid is 50% RH or less.

3. The cleaning method according to claim 1, characterized in that Also available: a recovery step of recovering residual water of the humidity-conditioning material after washing the humidity-conditioning material; and The regeneration step regenerates the humidity-controlling material.

4. The cleaning method according to claim 1, characterized in that: Also available: The removing step is to remove the second humidity-conditioning liquid remaining in the holding portion holding the humidity-conditioning material after the cleaning step.

5. The cleaning method according to claim 1, characterized in that: In the cleaning step, the humidity-conditioning material is cleaned using ultrasonic waves having a frequency that can follow the particle dirt and using the filtered second humidity-conditioning liquid.

6. The cleaning method according to claim 1, characterized in that: The humidity-control material is held by a total heat exchanger.

7. The cleaning method according to claim 6, characterized in that: The total heat exchanger comprises a heat storage material composed of a heat storage gel, In the cleaning step, cleaning is performed at a temperature below the solidification temperature of the thermal storage material.

8. The cleaning method according to any one of claims 1 to 7, characterized in that: The humidity-conditioning material is in a gel state.

9. A cleaning device for cleaning dirt from particles attached to a humidity-conditioning material, characterized in that: have: a storage unit storing a second humidity-conditioning liquid having a lower equilibrium humidity than the first humidity-conditioning liquid contained in the humidity-conditioning material; and The cleaning unit cleans the humidity-conditioning material using the second humidity-conditioning liquid stored in the storage unit.

10. The cleaning device according to claim 9, characterized in that: Also available: a recovery unit that recovers residual water of the humidity-conditioning material after washing the humidity-conditioning material; and The regeneration unit regenerates the humidity-controlling material.

11. The cleaning device according to claim 9, characterized in that: Also available: The removing unit removes the second humidity-conditioning liquid remaining on the holding unit holding the humidity-conditioning material when the humidity-conditioning material is washed.

12. The cleaning device according to claim 9, characterized in that: Also available: a filtering unit configured to filter the second humidity-conditioning liquid; and The ultrasonic cleaning unit cleans the humidity-controlling material using ultrasonic waves having a frequency that can follow the particle dirt.

13. The cleaning device according to any one of claims 9 to 12, characterized in that: The invention further comprises a total heat exchanger for holding the humidity-controlling material.

14. The cleaning device according to claim 13, characterized in that: The total heat exchanger further includes a heat storage material composed of a heat storage gel.

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