Long-acting heat exchange cushion

Abstract

The utility model discloses a long-acting heat exchange cushion which comprises a phase change energy storage layer, a softening heat exchange layer and a packaging bag for packaging the phase change energy storage layer and the softening heat exchange layer. The phase change energy storage layer comprises a phase change material and a supporting structure; the softening heat exchange layer comprises hydrogel; in the packaging bag, the phase change energy storage layer and the softening heat exchange layer are stacked and are separated by an interlayer. According to the long-acting heat exchange cushion, the heat exchange effect of lasting cooling or warm keeping is achieved through the phase change energy storage layer, the supporting structure adsorbs and composites the phase change material, and the shaping effect is displayed, so that the phase change energy storage layer keeps smooth for a long time; the cushion is comfortable due to the softening heat exchange layer, the service life of the cushion is prolonged, the packaging bag is made of a single-layer or double-layer flexible film, and the long-acting heat exchange effect of the cushion is guaranteed while the comfort of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of functional cushions, in particular to a long-acting heat-exchanging cushion. Background Art

[0002] In the hot summer season or when sitting for a long time, the surface temperature of the seat rises. Excessive seat surface temperature may cause users to sweat, and long-term use may increase skin moisture and discomfort, and even affect physical health. At the same time, in the hot summer, people use a lot of air-conditioning equipment to reduce the ambient temperature. However, not only does it generate a lot of energy consumption, but it also brings a considerable amount of electricity expenses, which is not conducive to energy conservation and emission reduction and environmental protection. Therefore, it is of great significance to develop a solution that can effectively reduce the surface temperature of the seat.

[0003] A common type of traditional seat cushion is the hydrogel seat cushion. Hydrogel seat cushions use moisture to absorb heat, drawing heat away from the skin surface, thereby lowering the temperature of the seat surface and improving user comfort. However, hydrogel seat cushions may have problems with moisture evaporation and performance degradation after long-term use, and their cooling effect is relatively limited.

[0004] In response to the above problems, CN209547576U discloses a phase change cushion, which includes: an outer shell, which is composed of an upper part and a lower part sewn along the entire peripheral edge, and the upper part and the lower part enclose a receiving cavity; and a cushion body located in the receiving cavity, the cushion body includes a vacuum bag-shaped outer shell and a first phase change layer and a second phase change layer arranged in the vacuum bag-shaped outer shell, wherein the first phase change layer includes a longitudinal vacuum strip and a first phase change strip arranged at intervals; the second phase change layer includes a transverse vacuum strip and a second phase change strip arranged at intervals; the first phase change strip and the second phase change strip are provided with the same phase change material. The cushion maintains a long-term cooling effect by arranging phase change material strips at intervals inside, but the outer layer coating material adopts a vacuum bag, and the heat conductivity of the vacuum bag itself is very poor, and the actual cooling effect when used by the user is not obvious.

[0005] Utility model CN210148850U discloses a cooling lining system, comprising: a sponge layer, a gel layer, and a breathable layer stacked in sequence, wherein the gel layer bonds the sponge layer and the breathable layer, and the gel layer is provided with a phase change material. The phase change material is added to the gel layer, and the phase change material will clump and harden during use, resulting in an uneven gel layer, which will affect the comfort of users when using it as a seat cushion for a long time.

[0006] Therefore, how to provide a seat cushion with a lasting cooling or warming heat exchange effect, a long service life and high comfort for users to use for a long time is a problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0007] In view of the above limitations, the utility model proposes a long-lasting heat exchange cushion, which aims to improve the heat exchange effect of the seat surface and the service life of the cushion while ensuring comfort.

[0008] A long-lasting heat exchange cushion comprises a phase change energy storage layer, a softening heat exchange layer, and an encapsulating bag encapsulating the phase change energy storage layer and the softening heat exchange layer;

[0009] The phase change energy storage layer includes a phase change material and a supporting structure;

[0010] The softened heat exchange layer includes hydrogel;

[0011] In the encapsulation bag, the phase change energy storage layer and the softening heat exchange layer are stacked and separated by an interlayer.

[0012] The support structure is arranged in the phase change energy storage layer and is compounded with the phase change material. The support structure preferably has a certain porosity to adsorb the phase change material and shape the solidified phase change material to maintain its overall flatness.

[0013] Furthermore, the packaging bag and / or the interlayer comprises a single-layer film or a multi-layer composite film, and the thickness of the film is 0.05-1 mm.

[0014] Furthermore, the single-layer film or multi-layer composite film includes at least one of a TPU film, a PVC film, an EVA film, a PE film, a PP film, a polyester film, and a polyamide film.

[0015] Furthermore, the softened heat exchange layer has a thickness of 1-10 mm.

[0016] The hydrogel in the softening heat exchange layer preferably includes any one of sodium carboxymethyl cellulose, sodium alginate, cross-linked polyacrylic acid, hydroxyethyl cellulose, chitosan, polyvinyl alcohol, pectin, and hyaluronic acid.

[0017] The softened heat exchange layer preferably further includes an anti-evaporation agent, and the anti-evaporation agent includes any one of sodium chloride, sodium sulfate, calcium sulfate, potassium sulfate, polyethylene glycol, and polyacrylate.

[0018] Furthermore, the thickness of the phase change energy storage layer is 1-15 mm, the phase change temperature of the phase change material is 0-100° C., and the phase change material includes at least one of phase change microcapsules, fixed phase change materials, organic phase change materials, and inorganic phase change materials. Among them, the organic phase change material is preferably one or more of alkanes, fatty acids, esters, and fatty alcohols.

[0019] Further, the support structure is composed of at least one of a resin-based support material, a carbon-based support material, a sponge support material, and a fiber support material. Preferably, the support structure is composed of a sponge support material, has a porous structure, and is composed of at least one of a polyurethane sponge, a silicone sponge, a foam sponge, and a rubber sponge.

[0020] Furthermore, a heat insulating layer is included, which is located on the outer side of the encapsulation bag close to the phase change energy storage layer, and / or located on the inner side of the encapsulation bag close to the phase change energy storage layer. When located on the inner side of the encapsulation bag, it is preferably separated from the phase change energy storage layer by a partition.

[0021] Furthermore, the heat insulation layer includes a thermal insulation layer, which is selected from one or more of pearl cotton, EVA thermal insulation layer, polypropylene foam thermal insulation layer, aerogel thermal insulation layer, and glass fiber thermal insulation layer.

[0022] Furthermore, the thermal insulation layer also includes an aluminum foil laminated on at least one side of the thermal insulation layer.

[0023] The long-lasting heat exchange cushion provided by the utility model has at least the following beneficial effects:

[0024] (1) The long-lasting heat exchange cushion is provided with a phase change energy storage layer and a softening heat exchange layer. The phase change energy storage layer is filled with a phase change material with high phase change latent heat to extend the action time of the heat exchange cushion and improve the user's sitting comfort. The softening heat exchange layer is in contact with the human body, filled with soft hydrogel, and uses a single-layer or double-layer flexible membrane material to ensure the comfort of the heat exchange layer.

[0025] (2) A supporting structure is provided in the phase change energy storage layer to support and adsorb the phase change material. When the phase change material undergoes phase change, the flatness of the seat cushion can be ensured, thereby improving the user's sitting comfort.

[0026] (3) The softening heat exchange layer is filled with an anti-evaporation agent to slow down the evaporation rate of water in the hydrogel, thereby significantly extending the service life of the seat cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a long-acting heat exchange cushion in one embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of a long-acting heat exchange seat cushion according to another embodiment of the utility model;

[0029] Figure 3 The temperature variation curve diagram of the samples corresponding to Examples 1-3 of the present utility model;

[0030] Figure 4 It is the temperature variation curve diagram of the samples corresponding to Examples 2 and 6 of the present utility model;

[0031] Figure 5 It is a temperature change curve diagram of the samples corresponding to Example 2 and Comparative Example 1 of the utility model.

[0032] Explanation of the accompanying drawings: 1-encapsulation bag, 2-softening heat exchange layer, 3-phase change energy storage layer, 11-interlayer, 31-phase change material, 32-support structure, 41-insulation layer, 42-aluminum foil. DETAILED DESCRIPTION

[0033] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0035] See attached Figure 1 and 2 , a long-lasting heat exchange cushion, comprising:

[0036] (1) Phase change energy storage layer 3, with a thickness of 1-15 mm. The phase change energy storage layer includes a phase change material 31 and a support structure 32;

[0037] The phase change material 31 includes at least one of phase change microcapsules, fixed phase change materials, organic phase change materials, and inorganic phase change materials; the phase change temperature of the phase change material is 0-100° C., and specifically, one or more of alkanes, fatty acids, esters, fatty alcohols, and water can be selected.

[0038] The support structure 32 has a thickness less than or equal to the thickness of the phase change energy storage layer 3, and is composed of at least one of a resin-based support material, a carbon-based support material, a sponge support material, and a fiber support material; preferably, it is composed of a sponge support material, has a porous structure, and is composed of at least one of a polyurethane sponge, a silicone sponge, a foam sponge, and a rubber sponge.

[0039] (2) a softened heat exchange layer 2 having a thickness of 1-10 mm, comprising a hydrogel and an optional anti-evaporation agent;

[0040] The hydrogel includes any one of sodium carboxymethyl cellulose, sodium alginate, cross-linked polyacrylic acid, hydroxyethyl cellulose, chitosan, polyvinyl alcohol, pectin, and hyaluronic acid.

[0041] The anti-evaporation agent includes any one of sodium chloride, sodium sulfate, calcium sulfate, potassium sulfate, polyethylene glycol, and polyacrylate.

[0042] (3) an encapsulating bag 1 having a thickness of 0.05-1 mm, wherein the encapsulating bag 1 and / or the interlayer 11 comprises a single-layer film or a multi-layer composite film, and is used to encapsulate / separate the phase change energy storage layer 3 and the softening heat exchange layer 2;

[0043] The single-layer film or multi-layer composite film includes at least one of a TPU film, a PVC film, an EVA film, a PE film, a PP film, a polyester film, and a polyamide film.

[0044] and optionally, (4) a heat insulating layer 4, the heat insulating layer 4 comprising a heat-insulating layer 41, and preferably further comprising an aluminum foil 42 laminated on at least one side of the heat-insulating layer 41;

[0045] The heat insulating layer 4 is located on the outer side of the encapsulating bag close to the phase change energy storage layer 3 and / or on the inner side of the encapsulating bag close to the phase change energy storage layer 3 and is separated from the phase change energy storage layer 3 by a partition.

[0046] The thermal insulation layer 41 includes one or more of pearl cotton, EVA thermal insulation layer, polypropylene foam thermal insulation layer, aerogel thermal insulation layer, and glass fiber thermal insulation layer.

[0047] Example 1

[0048] like Figure 1 As shown, the long-lasting heat exchange cushion of this embodiment includes:

[0049] (1) Phase change energy storage layer 3: The thickness is 10 mm. The phase change energy storage layer includes a phase change energy storage material 31 and a support structure 32. The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the support structure 32 is 3 mm thick and polyurethane foam is selected, with a density of 0.05 g / cm 3 .

[0050] (2) Softening heat exchange layer 2: The thickness is 5 mm, and the softening heat exchange layer includes hydrogel and anti-evaporation agent. The hydrogel is sodium carboxymethyl cellulose hydrogel; the anti-evaporation agent is sodium sulfate.

[0051] (3) The packaging bag 1 has a thickness of 0.5 mm and is made of a single-layer TPU film. The phase change energy storage layer and the softening heat exchange layer are stacked and separated by a single-layer spacer 11 (thickness 0.5 mm).

[0052] Example 2

[0053] The long-lasting heat exchange cushion of this embodiment includes:

[0054] (1) Phase change energy storage layer 3: with a thickness of 10 mm, the phase change energy storage layer includes a phase change energy storage material 31 and a support structure 32. The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the support structure 32 has a thickness of 10 mm and is made of polyurethane foam with a density of 0.05 g / cm 3 .

[0055] (2) Softening heat exchange layer 2: The thickness is 5 mm, and the softening heat exchange layer includes hydrogel and anti-evaporation agent. The hydrogel is sodium carboxymethyl cellulose hydrogel; the anti-evaporation agent is sodium sulfate.

[0056] (3) The packaging bag 1 has a thickness of 0.5 mm and is made of a single-layer TPU film. The phase change energy storage layer and the softening heat exchange layer are stacked and separated by a single-layer spacer 11 (thickness 0.5 mm).

[0057] Example 3

[0058] The long-lasting heat exchange cushion of this embodiment includes:

[0059] (1) Phase change energy storage layer 3: The thickness is 10 mm. The phase change energy storage layer includes a phase change energy storage material 31 and a support structure 32. The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the support structure 32 is 3 mm thick and polyurethane foam is selected, with a density of 0.09 g / cm 3 , thickness 3mm.

[0060] (2) Softening heat exchange layer 2: The thickness is 5 mm, and the softening heat exchange layer includes hydrogel and anti-evaporation agent. The hydrogel is sodium carboxymethyl cellulose hydrogel; the anti-evaporation agent is sodium sulfate.

[0061] (3) The packaging bag 1 has a thickness of 0.5 mm and is made of a single-layer TPU film. The phase change energy storage layer and the softening heat exchange layer are stacked and separated by a single-layer spacer 11 (thickness 0.5 mm).

[0062] Example 4

[0063] The long-lasting heat exchange cushion of this embodiment includes:

[0064] (1) Phase change energy storage layer 3: The thickness is 10 mm. The phase change energy storage layer includes a phase change energy storage material 31 and a support structure 32. The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the support structure is 3 mm thick and foamed graphite is selected, with a density of 0.09 g / cm 3 .

[0065] (2) Softening heat exchange layer 2: The thickness is 5 mm, and the softening heat exchange layer includes hydrogel and anti-evaporation agent. The hydrogel is sodium carboxymethyl cellulose hydrogel; the anti-evaporation agent is sodium sulfate.

[0066] (3) The packaging bag 1 has a thickness of 0.5 mm and is made of a single-layer TPU film. The phase change energy storage layer and the softening heat exchange layer are stacked and separated by a single-layer spacer 11 (thickness 0.5 mm).

[0067] Example 5

[0068] The long-lasting heat exchange cushion of this embodiment includes:

[0069] (1) Phase change energy storage layer 3: 10 mm thick, the phase change energy storage layer includes phase change energy storage material 31 and support structure 32. The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the support structure is 3 mm thick and polyurethane foam is selected, with a density of 0.05 g / cm 3 .

[0070] (2) Softening heat exchange layer 2: The thickness is 5 mm, and the softening heat exchange layer includes hydrogel. The hydrogel is selected from sodium carboxymethyl cellulose hydrogel.

[0071] (3) The packaging bag 1 has a thickness of 0.5 mm and is made of a single-layer TPU film. The phase change energy storage layer and the softening heat exchange layer are stacked and separated by a single-layer spacer 11 (thickness 0.5 mm).

[0072] Example 6

[0073] like Figure 2 As shown, the long-lasting heat exchange cushion of this embodiment includes:

[0074] (1) Phase change energy storage layer 3: The thickness is 10 mm. The phase change energy storage layer includes a phase change energy storage material 31 and a support structure 32. The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the support structure 32 is 3 mm thick and polyurethane foam is selected, with a density of 0.05 g / cm 3 .

[0075] (2) Softening heat exchange layer 2: The thickness is 5 mm, and the softening heat exchange layer includes hydrogel and anti-evaporation agent. The hydrogel is sodium carboxymethyl cellulose hydrogel; the anti-evaporation agent is sodium sulfate.

[0076] (3) The packaging bag 1 has a thickness of 0.5 mm and is made of a single-layer TPU film. The phase change energy storage layer and the softening heat exchange layer are stacked and separated by a single-layer spacer 11 (thickness 0.5 mm).

[0077] (4) a heat insulation layer 4, the heat insulation layer comprising a heat preservation layer 41 and an aluminum foil 42 laminated on the outer side of the heat preservation layer; wherein the thickness of the heat preservation layer is 3 mm, and the heat preservation layer is made of pearl cotton;

[0078] The heat insulation layer is located on the outer side of the packaging bag 1 close to the phase change energy storage layer 3 .

[0079] Comparative Example 1

[0080] The long-lasting heat exchange cushion of this comparative example comprises:

[0081] (1) Support layer: 10 mm thick, including support structure. The support structure is made of polyurethane foam with a density of 0.05 g / cm 3 .

[0082] (2) Softening heat exchange layer: The softening heat exchange layer with a thickness of 5 mm includes hydrogel and anti-evaporation agent. The hydrogel is sodium carboxymethyl cellulose hydrogel; the anti-evaporation agent is sodium sulfate.

[0083] (3) Encapsulation bag: The thickness is 0.5 mm, and a single-layer TPU film is selected. The support layer and the softening heat exchange layer are stacked and separated by a single-layer partition.

[0084] Comparative Example 2

[0085] The long-lasting heat exchange cushion of this comparative example comprises:

[0086] (1) Heat exchange layer, 10 mm thick, including: phase change energy storage material, hydrogel, and anti-evaporation agent, uniformly mixed;

[0087] The phase change temperature of the phase change energy storage material is 28°C, and n-octadecane is selected; the hydrogel is sodium carboxymethyl cellulose hydrogel; and the anti-evaporation agent is sodium sulfate.

[0088] (2) Encapsulating bag, thickness 0.5 mm, single-layer TPU film, encapsulating heat exchange layer 。

[0089] The main structures and material compositions of Examples 1-6 and Comparative Examples 1-2 are shown in Table 1:

[0090] Table 1

[0091]

[0092] The heat exchange performance of the samples of Examples 1-6 and Comparative Examples 1-2 was tested. The test results are shown in the attached Figure 3-5 .

[0093] Test conditions and methods: Before the test, each experimental sample (cushion) was placed in a 22°C environment for 2 hours to reach the same starting temperature. Then, the sample was placed in a 36°C constant temperature and humidity oven. A multi-channel temperature recorder was used to test the sample and record the temperature change curve of the cushion.

[0094] from Figure 3-5It can be seen that the heat exchange performance of the samples corresponding to the embodiments of the present invention is good, and they can maintain a relatively low temperature within 2 hours, providing an excellent cooling effect. In particular, the samples of Examples 2-6 heat up slowly, and the temperature is still lower than the set ambient temperature (36°C) after 5 hours. However, the sample of Comparative Example 1 heats up quickly within 2 hours, basically losing the cooling effect, and cannot meet the application requirements of the heat exchange cushion.

[0095] Although the preferred embodiments of the utility model have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the utility model includes the preferred embodiments and all related changes and modifications. Obviously, those skilled in the art may make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. If these modifications and variations based on the utility model fall within the scope of the utility model and its equivalent technology, the utility model is also intended to include these changes and variations.

Claims

1. A long-lasting heat exchange cushion, characterized in that: include: A phase-change energy storage layer (3), a softening heat exchange layer (2), and an encapsulating bag (1) encapsulating the phase-change energy storage layer and the softening heat exchange layer; The phase change energy storage layer (3) comprises a phase change material (31) and a support structure (32); The softened heat exchange layer (2) comprises hydrogel; In the packaging bag (1), the phase-change energy storage layer (3) and the softening heat exchange layer (2) are stacked and separated by a partition layer (11).

2. The long-lasting heat exchange cushion according to claim 1, characterized in that: The packaging bag (1) and / or the barrier layer (11) comprises a single-layer film or a multi-layer composite film, and the thickness of the film is 0.05-1 mm.

3. The long-lasting heat exchange cushion according to claim 2, characterized in that: The single-layer film or multi-layer composite film includes at least one of a TPU film, a PVC film, an EVA film, a PE film, a PP film, a polyester film, and a polyamide film.

4. The long-lasting heat exchange cushion according to claim 1, characterized in that: The softened heat exchange layer (2) has a thickness of 1-10 mm.

5. The long-lasting heat exchange cushion according to claim 4, characterized in that: The hydrogel includes any one of sodium carboxymethyl cellulose, sodium alginate, cross-linked polyacrylic acid, hydroxyethyl cellulose, chitosan, polyvinyl alcohol, pectin, and hyaluronic acid.

6. The long-lasting heat exchange cushion according to claim 1, characterized in that: The thickness of the phase change energy storage layer (3) is 1-15 mm, and the phase change temperature of the phase change material is 0-100° C.

7. The long-lasting heat exchange cushion according to any one of claims 1 to 6, characterized in that: It also includes a heat insulation layer (4), which is located on the outer side of the encapsulation bag close to the phase change energy storage layer (3), and / or located on the inner side of the encapsulation bag close to the phase change energy storage layer (3).

8. The long-lasting heat exchange cushion according to claim 7, characterized in that: The heat insulating layer (4) comprises a thermal insulation layer (41).

9. The long-lasting heat exchange cushion according to claim 8, characterized in that: The heat insulating layer (4) further comprises an aluminum foil (42) laminated on at least one side of the heat insulating layer (41).

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