Water tank heat preservation structure for water heater

Abstract

The utility model discloses a water tank thermal insulation structure for a water heater, which is characterized by comprising a water tank main body provided with a large surface and a small surface, the water tank main body is sequentially provided with more than three thermal insulation layers, a fourth thermal insulation layer positioned on the outermost layer and a first thermal insulation layer positioned on the innermost layer which are rubber and plastic cotton layers, the second heat preservation layer, located in the middle, of the large face is a VIP vacuum heat insulation plate layer. The third heat preservation layer, located in the middle, of the small face is an EPS white foam layer or a polyurethane layer, and the end of the second heat preservation layer is connected with the end of the third heat preservation layer. The water heater is good in stability, the heat preservation performance of the water heater is improved, the product thickness is reduced, and meanwhile the production rejection rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and more specifically to a water tank insulation structure for a water heater. Background Art

[0002] At present, electric water heaters on the market generally use volumetric water tanks as hot water storage devices. In order to avoid or reduce the heat loss of the water tank, it is necessary to fill the outer shell and the inner tank of the volumetric water tank with insulation materials such as polyurethane foam, EPS white foam, rubber and plastic cotton, glass fiber cotton, VIP vacuum insulation board, etc. to avoid or reduce the heat loss in the water tank. The heat transfer coefficient of general insulation materials is 0.03~0.04w / mk, the insulation effect is general, and the deformability is good; the heat transfer coefficient of VIP vacuum insulation board is generally 0.003~0.006w / mk, the insulation effect is good, but it can generally only be made into a flat plate with poor deformability. The water heaters in general industries are round, and the vacuum board has poor adhesion and cannot play a good insulation role. In addition, it is easy to be punctured, resulting in a high scrap rate, so it is rarely used in the industry. For example, the Chinese patent publication number CN102345939A discloses a multi-layer composite integral insulation structure of a volumetric water tank, which adopts a polyurethane foaming production process to fill and fix the far-infrared floor heating emitting cloth and the heat-insulating vacuum plate placed between the outer shell and the inner tank of the water tank, so as to form a multi-layer composite integral insulation structure, which can be used in household solar water heaters, electric water heaters, gas water heaters, heat pumps and various hot water projects. However, the disadvantage is that the insulation effect is still not ideal, so it is necessary to further improve the existing technology. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the prior art and to provide a water tank insulation structure for water heaters which can improve the thermal insulation performance of water heaters, reduce product thickness, and reduce production scrap rate.

[0004] The utility model adopts the following technical solutions to achieve the above-mentioned purpose: a water tank insulation structure for a water heater, characterized in that it includes a water tank main body provided with a large surface and a small surface, the water tank main body is sequentially provided with more than three insulation layers, the insulation layer four located at the outermost layer and the insulation layer one located at the innermost layer are rubber-plastic cotton layers, the insulation layer two located in the middle of the large surface is a VIP vacuum insulation board layer; the insulation layer three located in the middle of the small surface is an EPS white foam layer or a polyurethane layer; the ends of the insulation layer two and the insulation layer three are connected to each other, the inner surface of the insulation layer two is attached to the side surface of the insulation layer three to form a heat dissipation gap, the length of the heat dissipation gap is greater than 30 mm, and good system insulation performance is ensured.

[0005] As a further illustration of the above scheme, the innermost insulation layer is close to the water tank body, and its function is to help leveling and cover sharp points while having a certain insulation effect. The thickness of the innermost insulation layer is 2~8mm.

[0006] Furthermore, the thickness of the second insulation layer is 5-12 mm, and the heat insulation effect is better.

[0007] Furthermore, the thickness of the third insulation layer is 30-50 mm, has good deformability, can be shaped, and is used to connect water inlet and outlet pipes, sensors, etc. of the water heater.

[0008] Furthermore, the thermal insulation layer three is formed by using EPS white foam or polyurethane mold.

[0009] Furthermore, in order to reduce the heat loss at the heat dissipation gap formed by the second and third insulation layers, the edge of the second insulation layer is extended and overlapped to the outer surface of the third insulation layer.

[0010] The beneficial effects that can be achieved by the utility model by adopting the above technical solution are:

[0011] The utility model adopts more than three insulation layers arranged in sequence on the surface of the water tank body, the outermost insulation layer four and the innermost insulation layer one are rubber-plastic cotton layers, the middle insulation layer two of the large surface is a VIP vacuum insulation board layer; the middle insulation layer three of the small surface is an EPS white foam layer or a polyurethane layer, the ends of the insulation layer two and the insulation layer three are connected to each other, and the thickness of the whole machine can be thinned by more than 40mm, which not only improves the insulation performance of the water heater, but also reduces the product thickness and reduces the production scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 for Figure 1 A partial enlarged view of .

[0014] Description of the accompanying drawings: 1, water tank body 2, insulation layer four 3, insulation layer one 4, insulation layer two 5, insulation layer three. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0016] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.

[0017] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the utility model, unless otherwise specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "below" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than the height of the second feature. A first feature being "above", "below" and "below" a second feature includes that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is lower than the second feature.

[0019] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.

[0020] like Figure 1-Figure 2As shown, the utility model is a water tank insulation structure for a water heater, which includes a water tank body 1 provided with a large surface and a small surface, and the water tank body 1 is square. The water tank body 1 is provided with three layers of insulation layers from the outside to the inside, and the insulation layer 4 2 located at the outermost layer and the insulation layer 1 3 located at the innermost layer are rubber-plastic cotton layers with a thickness of 2 to 8 mm. The insulation layer 2 4 located in the middle of the large surface is a VIP vacuum insulation board layer; the insulation layer 3 5 located in the middle of the small surface is an EPS white foam layer or a polyurethane layer, and the ends of the insulation layer 2 4 and the insulation layer 3 5 are connected to each other. Among them, the insulation layer 4 2 can prevent sharp objects such as the outer shell and sharp objects in the production process from touching the VIP vacuum insulation board, and has a protective effect on it, and can also play a certain insulation role. The role of the insulation layer 1 3 is to have a certain insulation effect while being close to the water tank body, helping leveling, and covering sharp points. The second insulation layer 4 requires good thermal insulation effect, with a thickness between 5 and 12 mm. The third insulation layer 5 requires good deformability and can be shaped. It is used to connect the water heater inlet and outlet pipes, sensors, etc., with a thickness between 30 and 50 mm.

[0021] The inner surface of the second thermal layer is fitted with the side surface of the third thermal insulation layer. The fitting surface will inevitably form a heat dissipation gap. To reduce heat loss, according to test results, the length of the heat dissipation gap should be greater than or equal to 30 mm. In addition, in order to reduce heat loss at the gap formed by the second thermal insulation layer 4 and the third thermal insulation layer 5, the edge of the second thermal insulation layer 4 should be extended to overlap the outer surface of the third thermal insulation layer 5, extending the gap heat transfer distance L.

[0022] Compared with the prior art, the utility model adopts three layers of insulation layers arranged in sequence on the surface of the water tank body, the outermost insulation layer four and the innermost insulation layer one are rubber-plastic cotton layers, the middle insulation layer two of the large surface is a VIP vacuum insulation board layer; the middle insulation layer three of the small surface is an EPS white foam layer or a polyurethane layer, the ends of the insulation layer two and the insulation layer three are connected to each other, and the thickness of the whole machine can be thinned by more than 40mm, which not only improves the insulation performance of the water heater, but also reduces the product thickness and reduces the production scrap rate.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A water tank insulation structure for a water heater, characterized in that: It includes a water tank body with a large surface and a small surface, wherein the water tank body is sequentially provided with more than three layers of insulation layers, the outermost insulation layer 4 and the innermost insulation layer 1 are rubber-plastic cotton layers, the middle insulation layer 2 of the large surface is a VIP vacuum insulation board layer; the middle insulation layer 3 of the small surface is an EPS white foam layer or a polyurethane layer; the ends of the insulation layer 2 and the insulation layer 3 are connected to each other, the inner surface of the insulation layer 2 is attached to the side surface of the insulation layer 3 to form a heat dissipation gap, and the length of the heat dissipation gap is greater than 30 mm.

2. A water tank insulation structure for a water heater according to claim 1, characterized in that: The innermost insulation layer is in close contact with the water tank body, and the thickness of the innermost insulation layer is 2-8 mm.

3. A water tank insulation structure for a water heater according to claim 1, characterized in that: The thickness of the second insulation layer is 5~12mm.

4. The water tank insulation structure for a water heater according to claim 1, characterized in that: The thickness of the third insulation layer is 30~50mm.

5. The water tank insulation structure for a water heater according to claim 1, characterized in that: The third insulation layer is EPS white foam or polyurethane molded structure.

6. A water tank insulation structure for a water heater according to claim 1, characterized in that: The edge of the second insulation layer is extended and overlapped to the outer surface of the third insulation layer.

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