Fixing structure of electric heating wire and electric heating product

Abstract

The utility model provides an electric heating product and a fixing structure of an electric heating wire, aiming at solving the technical problems that the fixing structure of the electric heating wire in the electric heating product in the prior art is easy to cause the knotting of the electric heating wire of the electric heating product and the automatic wiring cannot be realized, the utility model provides the electric heating product and the fixing structure of the electric heating wire, comprising an overseam strip / belt and a sewing thread, the fixing structure of the electric heating product and the electric heating wire comprises an overseam strip / belt, two ends of the overseam strip / belt in the width direction form an overseam wing, the two overseam wings are oppositely arranged to form a channel for accommodating the electric heating wire, and a sewing thread is arranged at the overlapped part of the two overseam wings along the length direction of the overseam strip / belt. The whole electric heating wire can be fixed on the heating product body, the electric heating wire is not prone to knotting, and full-automatic production can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric heating products, and particularly relates to a fixing structure of an electric heating wire and an electric heating product. Background Art

[0002] Traditional electric heating products such as electric upper cover blankets and electric lower bedding blankets have entered people's lives for many years. As winter heating supplies, they have the advantages of being clean, convenient, and temperature adjustable, and are widely used. With the improvement of people's living standards, higher requirements for winter heating have been put forward. Therefore, more new electric heating products have been put into the market, such as electric heating products that can be directly worn on the body for heating, electric cover blankets, electric shawls, etc. Because they can be directly worn, they are convenient and warm, and are widely popular in cold regions such as Europe and America.

[0003] Since electric heating products are transforming towards wearable products, the requirements for electric heating products have also changed significantly. Not only are they required to be lightweight, comfortable, and warm, but higher requirements are also put forward for safety performance, washability performance, and wearing performance.

[0004] Taking electric shawls and electric cover blankets as examples, since they are in direct contact with the body and need to be washed frequently, high requirements for the washability performance of electric heating products are needed, and they should not deform or lose loops after washing. Since they are directly worn on the body, people no longer treat electric shawls and electric cover blankets as carefully as they did with electric upper cover blankets and electric lower bedding blankets in the past, and the randomness is very strong. For example, they are often moved, folded, kneaded, and balled up, etc. Therefore, the electric heating wires of electric shawls, electric cover blankets and other products are prone to knotting, and safety accidents are particularly likely to occur after knotting. In order to prevent accidents caused thereby, in the industry, in order to ensure the use safety of electric heating products, a safety control circuit is usually set up. When the electric heating wire knots, the safety control circuit starts to cut off the power, making the electric heating product scrapped and withdrawn from use. During the warranty period, the producer is responsible for bearing the losses, and consumers can return the goods at any time. Currently, due to the use of the following fixing structure to fix the electric heating wire, the electric heating wire is extremely prone to knotting after being worn for a period of time or after being washed, so that the producers and operators bear a high return rate and high production and service costs. For example Figure 1-2As shown, the fixing structure of the electric heating wire in the prior art is as follows: it includes two upper and lower substrates 10, and multiple groups of parallel quilting lines 15 are arranged on the upper and lower substrates according to the wiring path of the electric heating wire. Each group of quilting lines includes two parallel straight quilting lines. A channel for the electric heating wire to pass through is formed between each group of quilting lines. The electric heating wire 11 passes through the channel 17 in a circuitous manner and is fixed between the two substrates by interlacing. That is, the electric heating wire alternately passes through each channel 17 in a serpentine manner and is distributed between the two substrates. In order to fix the part of the electric heating wire located at the open mouth at both ends, adhesive paper is used to stick the heating wire. The adhesive paper can be fixed at the time of bonding, but it often debonds after washing. In addition, the adhesive paper is done manually, and it cannot guarantee that each channel is very firmly attached. There will be a phenomenon of missing stickers. After washing, there is no constraint on the heating wire. This fixing method has the following disadvantages: the heating wire is arranged in an arc when passing through the channel formed by two adjacent groups of quilting lines. The arc-shaped portion cannot be sewn by quilting due to the difficulty in processing. Therefore, the actual heating wire is free to transition in this portion, and there is no fixed structure to fix this portion of the heating wire. In order to facilitate threading, the distance between the two quilting lines that make up the channel is relatively large, and the heating wire has a high degree of freedom in it. Therefore, when the heating wire is worn or washed dynamically, it will move. The arc section between the two adjacent channels will not be maintained along the intended route, but one end will have a long line and the other end will have a short line. The end with more lines is prone to knotting under dynamic conditions, and the end with fewer and shorter lines will cause the substrate to gather and wrinkle. At the same time, since the width of the channel is much wider than the diameter of the heating wire, the heating wire in the channel is also prone to knotting during the movement process. Therefore, the heating products will be scrapped, resulting in a high return rate, which accounts for 4-5% of the total product volume each year. The heating wire in the channel is prone to tangling during movement. This tangling can cause the product to overheat under abnormal conditions, potentially leading to burns. Prolonged use of the heating product under abnormal conditions can cause circuit loss of control, leading to circuit failure. In severe cases, this can damage the product, cause a fire, and result in personal and property damage. It can also cause the product to self-destruct and become scrapped. Heating wire tangling is a significant risk for heating products. A tangled product can render the product scrapped, leading to a high return rate of 4-5% of all products annually. Therefore, heating wire tangling is something all manufacturers strive to avoid. Furthermore, with the aforementioned fixing structure, setting the quilting thread and threading the thread are separate processes, typically performed manually. Imported automatic threading machines are also available, but the two processes cannot be automated, making fully automated heating wire fixing impossible, resulting in low production efficiency across the industry. The inability to automate threading is a bottleneck in this industry.Regarding the problem of inability to achieve automated wiring, in October 2023, the Electric Heating Upper Blanket and Electric Heating Lower Blanket Committee of the China Household Electrical Appliances Association proposed an industry task. The Household Electrical Appliances Association took the lead in establishing a research and development group for automated wiring technology of electric heating upper blankets and electric heating lower blankets, gathering the strength of leading enterprises in the industry to develop new products to improve the automation level, and put forward the research and development ideas of electric heating composite and glue composite. However, after one year of practice, the results were not significant. This issue was clearly recorded in the minutes of the 2024 annual meeting of the China Household Electrical Appliances Association (Special Letter of the China Household Electrical Appliances Association

[2024] No. 24). Utility Model Content

[0005] The purpose of the present utility model is to provide a fixing structure for an electric heating wire and an electric heating product in view of the technical problems in the prior art that the fixing structure of the electric heating wire in an electric heating product is prone to knotting of the electric heating wire of the electric heating product and cannot achieve automated wiring.

[0006] The following specific technical solutions are adopted:

[0007] A fixing structure for an electric heating wire, characterized in that it includes a binding strip / tape and a sewing thread. The two ends in the width direction of the binding strip / tape form binding wings. After the two binding wings are arranged oppositely, a channel for accommodating the electric heating wire is formed. The sewing thread is arranged along the length direction of the binding strip / tape at the overlapping part of the two binding wings.

[0008] Furthermore, the sewing thread is used to sew and connect the two overlapping binding wings with the main body of the electric heating product for fixing the electric heating wire together; and / or there is one or more sewing threads. When there are two or more sewing threads, the sewing threads are arranged in parallel, and / or the binding strip / tape is a binding cloth strip; and / or the channel is a complete and gapless channel in the length direction; and / or the electric heating wire is tightly wrapped by the binding strip / tape.

[0009] An electric heating product includes a main body of the electric heating product. The main body of the electric heating product includes at least one surface layer and / or at least one substrate. The electric heating wire is fixed on the main body of the heating product through a fixing structure. The fixing structure is the fixing structure for an electric heating wire described in any one of the foregoing items. The binding strip / tape is fixedly connected with the surface layer and / or the substrate through the sewing thread. The electric heating wire is coated in the channel and runs through the length of the channel.

[0010] Furthermore, the electric heating product includes a first surface layer, a second surface layer and a substrate. The substrate is clamped between the first surface layer and the second surface layer. The electric heating wire is fixedly connected with the substrate through a fixing structure.

[0011] Furthermore, it further includes a wiring device. The wiring device is fixedly arranged on the main body of the electric heating product. The two ends of the electric heating wire are respectively connected to the positive and negative poles of the wiring device.

[0012] Furthermore, the electric heating wire is arranged as a whole or in sub-regions on the substrate or the surface layer, and / or the wiring path of the electric heating wire consists of multiple straight segments connected end to end in parallel, and each straight segment is connected end to end by an arc line.

[0013] Furthermore, the electric heating product is an electric heating clothing product, and the electric heating clothing product is any one of an electric heating upper blanket, an electric heating lower blanket, an electric heating poncho, an electric heating thermal underwear, an electric heating thermal outerwear, and an electric heating thermal pants, or the electric heating product is an electric heating heating product, and the electric heating heating product is any one of an electric heating mattress, an electric heating pad, an electric heating upper blanket, and an electric heating lower blanket, or the electric heating product is an electric heating outdoor product, and the electric heating outdoor product is any one of an electric heating thermal tent and an electric heating simple shed.

[0014] Furthermore, the junction box is connected to a power plug through a power cord, and a controller is arranged on the power cord.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] With the fixing structure of the electric heating wire adopting the structure of the present utility model, the electric heating wire is wrapped in the sewing strip / band along the length direction of the sewing strip / band through the sewing strip / band, so that the sewing strip / band wraps the entire length of the power generation wire, and a sewing line is arranged on one side where the two wrapping wings face each other to form a channel for accommodating the electric heating wire by the sewing strip / band. The entire electric heating wire is fixed by the sewing strip / band. As long as the sewing strip / band is fixed on the surface layer and / or the substrate of the electric heating product, the electric heating wire can be integrally fixed on the heating product body, and the fixing is firm and reliable. In this structure, since the sewing line is only arranged at the opening on one side formed by the two wrapping wings and the sewing line is located on one side of the electric heating wire, during the processing, the electric heating wire can be fixed on the heating product body by the method of sewing the sewing strip / band on the heating product body while wrapping the electric heating wire. Therefore, the process of threading the electric heating wire is omitted, the processing operation links are reduced, and the automation of the fixing of the electric heating wire can be realized, and the production efficiency is greatly improved. The technical problems of low efficiency of threading the electric heating wire and inability to automate, which have always plagued the development of this industry, are solved, and unexpected technical effects are achieved; the fixing structure of the present utility model can be directly fixed on the substrate, connected to the substrate and then connected to the surface layer, or the surface layer and the substrate can be sewn and fixed together. Therefore, it has strong adaptability, and different fixing methods of the electric heating wire can be adopted according to different requirements, which is beneficial to realizing the automation of the fixing of the electric heating wire through ordinary equipment.

[0017] For the electrothermal product adopting the structure of the present utility model, the electrothermal wire is fixed on the electrothermal product body through a fixing structure composed of a sewing strip / tape and a sewing thread. Within the range of connection with the electrothermal product body, the fixation between the two is along the entire length of the electrothermal wire, and the electrothermal wire is completely fixed on the electrothermal product body. Therefore, no matter whether the electrothermal product is kneaded, balled up, or washed, it remains integrated with the electrothermal product body without dislocation, and thus does not get knotted. When the electrothermal wire is fixed on the electrothermal product body, the sewing thread is only arranged on one side of the electrothermal wire, and the wiring path of the sewing thread is not restricted and can be completed by mechanical processing at one time, greatly reducing the processing difficulty and improving the production efficiency. The electrothermal wire can be arranged on the surface layer or the substrate according to the needs of the electrothermal product to meet the requirements of different electrothermal products.

[0018] The electrothermal wire of the electrothermal product adopting the present utility model and the electrothermal wire fixing structure is fixed, and the whole electrothermal wire is fixed at a determined position through the sewing strip / tape and the sewing thread, and very regular and uniform wiring can be carried out, making the processing of the product unified, which helps to control the appearance quality and sewing quality of the product. Compared with the prior art that uses the quilting method to fix the electrothermal wire, where the electrothermal wire is fixed in a channel with a certain width and the electrothermal wire is only sandwiched between two quilting threads but not truly fixed and is prone to displacement, in the method and fixing structure of the present utility model, the electrothermal wire is fixed in the sewing strip / tape from beginning to end, and the two ends of the electrothermal wire are fixed through the sewing strip / tape and the sewing thread, so that the whole electrothermal wire can be fixed at a determined position. Therefore, the phenomenon of moving out from the open openings at both ends of each channel will not occur. Therefore, the phenomenon of the electrothermal wire getting knotted can be avoided from the aspect of structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an electrothermal product in the prior art;

[0020] Figure 2 is Figure 1 the enlarged partial cross-sectional view at A of

[0021] Figure 3 is a schematic structural diagram of an embodiment of the electrothermal product of the present utility model, where the electrothermal product body part is expressed by an exploded view.

[0022] Figure 4 is Figure 2 the enlarged partial cross-sectional view at A of

[0023] DESCRIPTION OF THE REFERENCE NUMERALS

[0024] 1 - Electric heating product body, 10 - Substrate, 11 - Electric heating wire, 12 - First surface layer, 13 - Second surface layer; 14 - Overlock strip / tape, 15 - Sewing thread, 16 - Wrapping wing, 17 - Channel, 18 - Fixing structure, 21 - Power plug, 22 - Controller, 23 - Junction box. Detailed implementation mode

[0025] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model; relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0027] As Figure 3-4 shown, the electric heating product of the structure of the embodiment of the present utility model includes an electric heating product body 1 and an electric heating wire 11. The electric heating product body may only include a surface layer, or may only include a substrate 10, or may include both a surface layer and a substrate. The electric heating wire is fixedly arranged on the electric heating product body through a fixing structure. When the electric heating product body only includes a surface layer, the electric heating wire is fixedly arranged on the surface layer through a fixing structure. When the electric heating product body only includes a substrate, the electric heating wire is fixedly arranged on the substrate through a fixing structure. When the electric heating product body includes a surface layer and a substrate, the electric heating wire is fixedly arranged on the substrate through a fixing structure. The substrate is fixedly connected to the surface layer, and the electric heating wire may also be fixedly arranged on the substrate and the surface layer at the same time, and the three are integrally connected.

[0028] In common embodiments, the surface layer includes a first surface layer 12 and a second surface layer 13, and the substrate 10 is sandwiched between the first surface layer and the second surface layer and fixedly connected to the first surface layer and the second surface layer.

[0029] In the present utility model, the fixing structure includes a sewing strip / band 14 that wraps the electric heating wire 11, and a sewing thread 15 that sews the opening side of the sewing strip / band 14 to the electric heating product body. The length direction of the sewing strip / band wraps around the electric heating wire along the length direction of the electric heating wire. Two wrapping wings 16 are formed in the width direction of the sewing strip / band. The two wrapping wings are overlapped and set, and the two wrapping wings and the electric heating product body are sewn together by the sewing thread. It can be that the two wrapping wings 16 of the sewing strip / band wrapped with the electric heating wire are sewn together first to clamp the electric heating wire, and then the electric heating wire is fixed on the inner side and / or outer side of the electric heating product through the two wrapping wings by the sewing thread. It can also be that the sewing strip / band wrapped with the electric heating wire is directly sewn and fixed on the inner side and / or outer side of the electric heating product body through the sewing thread and the two wrapping wings. With this fixing method, since the entire length of the electric heating wire runs through the sewing channel formed by the enclosure of the two wrapping wings of the sewing strip / band, and only needs to be fixed by the sewing thread at the unilateral two wrapping wings of the electric heating wire, therefore, the electric heating wire can be wrapped while wiring, and a single or multiple lines can be sewn with an ordinary sewing machine to achieve the automation of wiring. Moreover, a special sewing strip equipment can be used for sewing to further improve the production efficiency. And because the electric heating wire is fixed in full length and wrapped by the sewing strip / band, when in use, both ends of the electric heating wire are fixedly connected to the junction box, and the junction box is fixed on the electric heating product body. Therefore, the electric heating wire moves together with the fixed electric heating product body and will not move around in the sewing channel, and the phenomenon of the electric heating wire knotting can be eliminated. And the wiring path of the electric heating wire is not restricted, and it can be wired according to the required wiring path, arranged flexibly, omitting the process of threading the wire, greatly improving the production efficiency, and solving the technical problems that have always troubled the development of the industry.

[0030] As an optional implementation scheme, the electric heating wires on the electric heating product body can be arranged as a whole or in different regions. When arranged in different regions, the electric heating wires in different regions can be independently controlled for heating temperature to meet different requirements.

[0031] As an optional implementation scheme, the first surface layer 12 and the second surface layer 13 can respectively adopt one of flannelette, linen or warp and weft woven fabric, which can be selected according to actual needs.

[0032] As an optional implementation scheme, the sewing strip / band can adopt a binding cloth strip, a binding strip. The sewing thread can be a single strip or multiple parallel strips.

[0033] The electric heating product can be a clothing product such as an electric heating blanket, electric heating thermal underwear, outerwear, electric heating thermal pants, etc., or a heating product such as an electric heating mattress, electric heating upper covering blanket, electric heating lower laying blanket, etc., or can also be made into an outdoor product such as an electric heating thermal tent.

[0034] Generally, non-woven fabric is used as the substrate. The non-woven fabric is soft and suitable for clothing.

[0035] The fixing structure of the utility model can be sewn manually or by equipment, and the equipment can sew multiple threads simultaneously to improve efficiency.

[0036] In a further improved technical solution, the electric heating product further includes a wiring portion, which includes a junction box 23 fixed to the electric heating product body 1 and a power cord connected to the junction box 23. The power cord is equipped with a power plug 21 and a controller 22, which is used to switch the power supply and adjust the heating gear. Figure 3 (for Figure 2 (enlarged view of the local cross section at point A in the middle).

[0037] The fixing structure of the present invention fixes the electric heating wire, and the wiring path of the electric heating wire can be circular, or can be in a circuitous serpentine shape, or a flat spiral shape, or a U-shaped structure.

[0038] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention shall be included in the scope of protection of the present invention.

[0039] Example 1

[0040] The electric heating product is an electric heating blanket, which has a first surface layer and a second surface layer, with a backing fixed between the first surface layer and the second surface layer. The specification size is 50x60 inches, the surface fabric is flannel + cotton velvet, the backing fabric is non-woven fabric, the heating wire model is 202005025, and the stitch density is 5.5mm. The wiring path is as follows Figure 1 The structure shown is a serpentine structure with straight lines connected at the beginning and end by arcs. The washing equipment used is Whirlpool 3LWTW4840YW1.

[0041] The fixing structure adopts the fixing structure of the present invention, which is wrapped with a binding cloth strip and then sewn with the substrate by a single thread. The binding cloth strip is made of non-woven fabric.

[0042] Comparative Example 1

[0043] The fixed structure has two layers of substrates, and electric heating wire channels are sewn on the two substrates by quilting. The electric heating wire is inserted into the electric heating wire channel. The rest of the first surface layer, second surface layer, heating wire model, wiring path, etc. are the same as embodiment 1.

[0044] The surface fabric of Example 2 is single-faced velvet, the backing fabric and the seam strip / tape material are all polyester cloth, and the rest is the same as Example 1.

[0045] The surface fabric of Example 3 is coral fleece, the backing fabric and the seam strip / tape material are polyester-cotton cloth, and the rest is the same as Example 1.

[0046] The surface fabric, substrate fabric, and overlock strip / tape material of Comparative Example 2 are the same as those of Example 2, and the rest are the same as Comparative Example 1.

[0047] The surface fabric, substrate fabric, and overlock strip / tape material of Comparative Example 3 are the same as those of Example 3, and the rest are the same as Comparative Example 1.

[0048] Washing comparison experiments were conducted on the electric heating products of Examples 1-3 and Comparative Examples 1-3. The experimental equipment was Whirlpool 3LWTW4840YW1, and the test standard was UL964. The machine washing test was carried out as follows: Fill the washing machine with warm water at 65 °C, add half a cup of washing powder or mild soap flakes, and stir to dissolve. Immerse one product in the washing machine for 5 minutes, stir slowly for 2 minutes, and spin dry at normal speed. The washing machine continues to inject cold water for rinsing, stir for 1 minute, and rotate at normal speed. Repeat the rinsing once. Dry at high temperature in an automatic dryer for 5 minutes. Finally, flatten the product to its original shape and size until it is completely dry. 5 samples were taken from each of the throws in Examples 1-3, and 5 samples were taken from each of the throws in Comparative Examples 1-3. Each throw was washed 30 times, and the appearance was observed after washing. The test results are as follows:

[0049] Table 1 Comparison table of experimental results:

[0050]

[0051] Conclusion: Regardless of the materials used for the surface material, substrate material, and overlock strip / tape of the electric heating product, when the fixing structure of the present invention is used to fix the electric heating wire, the electric heating wire will not knot, nor will it be thrown out of the channel or bent. In contrast, the knotting rates of Comparative Examples 1-3 are 80% for Comparative Example 1, 20% for Comparative Example 2, and 100% for Comparative Example 3. The proportions of the electric heating wire being thrown out of the channel are 20%, 0, and 40% respectively. The functions are generally normal when tested immediately after washing.

[0052] It can also be seen from the test data that: If the existing technology quilting fabric and the process of threading the heating wire are used, the safety of the blanket has a very large relationship with the fabric. Some fabrics are better and some are worse. But knotting phenomena are prone to occur. By using the heating wire fixing structure and fixing method of the present invention to fix the heating wire, the fixing effect is not affected by the type of fabric, giving consumers much more choice and ensuring safety.

Claims

1. A fixing structure for an electric heating wire, characterized in that: It includes a seam strip / belt and a suture. The two ends of the seam strip / belt in the width direction form wings. The two wings are arranged opposite to each other to form a channel for accommodating the electric heating wire. The suture is arranged at the overlapping part of the two wings along the length direction of the seam strip / belt.

2. The fixing structure of the electric heating wire according to claim 1, characterized in that: The suture is used to sew the two overlapping wings and the electric heating product body that fixes the electric heating wire together; and / or the suture is more than one, and when there are more than two sutures, the sutures are arranged in parallel, and / or the seam strip / belt is a edging cloth strip; and / or the channel is a complete channel without gaps in the length direction; and / or the electric heating wire is tightly wrapped by the seam strip / belt.

3. An electric heating product, characterized in that: It includes an electric heating product body, which includes at least one surface layer and / or at least one substrate. The electric heating wire is fixed to the heating product body through a fixing structure. The fixing structure adopts the fixing structure of the electric heating wire according to any one of claims 1-2. The seam strip / belt is fixedly connected to the surface layer and / or substrate through the stitching. The electric heating wire is wrapped in the channel and runs through the length of the channel.

4. The electric heating product according to claim 3, characterized in that: The electric heating product comprises a first surface layer, a second surface layer and a substrate, wherein the substrate is sandwiched between the first surface layer and the second surface layer, and the electric heating wire is fixedly connected to the substrate via a fixing structure.

5. The electric heating product according to claim 3, characterized in that: It also includes a wiring device, which is fixedly arranged on the body of the electric heating product, and the two ends of the electric heating wire are respectively connected to the positive and negative poles of the wiring device.

6. The electric heating product according to claim 5, characterized in that: The heating wires are arranged as a whole or in different areas on the substrate or surface, and / or the wiring path of the heating wires is a plurality of straight lines connected end to end and parallel to each other, and each straight line is connected end to end by an arc line.

7. The electric heating product according to claim 3, characterized in that: The electric heating product is an electric heating clothing product, which is any one of an electric heating blanket, electric heating thermal underwear, electric heating outerwear, and electric heating thermal pants; or the electric heating product is an electric heating product, which is any one of an electric heating mattress, an electric heating pad, an electric upper blanket, and an electric lower blanket; or the electric heating product is an electric heating outdoor product, which is any one of an electric heating tent and an electric heating shed.

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