Composite electric heating water pipe and heating equipment

Abstract

The utility model relates to the technical field of liquid heating equipment, in particular to a composite electric heating water pipe and heating equipment. The composite electric heating water pipe comprises a shell, a water pipe is arranged in the shell, the shell has a first form and a second form, and the shell is converted into the second form from the first form through cold machining; the heating element is arranged in the shell; in the first state, the heating element can be installed in the shell, and in the second state, the heating element and the water pipe are relatively fixed, and heat exchange can be conducted between the heating element and the water pipe. The shell is converted into the second form from the first form through cold machining, the water pipe and the heating element are fixed, the technological process is simple, the production cost is reduced, the influence on the water pipe in the machining process is reduced, the situation that the inner portion is round and the outer portion is oval is avoided, the water pipe and the heating element are both attached to the shell, and the service life is prolonged. The heat exchange efficiency between the water pipe and the heating element is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid heating equipment, in particular to a composite electric heating water pipe and a heating equipment. BACKGROUND

[0002] Coffee machines, instant water heaters, steam ovens and other equipment that require hot water need to provide hot water quickly. The composite electric heating water pipe is a kind of element that can quickly provide hot water or steam by combining the water pipe and the electric heating pipe. In the related art, the composite electric heating water pipe mainly adopts the simple nesting structure of the outer pipe sleeve and the inner pipe, and is brazed together after the pipe shrinking and flattening process, so the manufacturing process is relatively complex and the cost is high. In addition, the composite electric heating water pipe usually has an inner pipe and an outer pipe, which can easily cause the inner circle to be elliptical during the processing process, thereby forming a certain gap between the long axis direction of the ellipse and the outer surface of the inner pipe, reducing the heating efficiency. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to solve at least one of the technical problems in the related art. To this end, the present application provides a composite electric heating water pipe, comprising:

[0004] A shell is provided with a water pipe inside, and the shell has a first form and a second form. The shell is changed from the first form to the second form through cold working.

[0005] A heating element is arranged in the shell.

[0006] In the first form, the heating element can be installed in the shell. In the second form, the heating element is fixed relative to the water pipe, and the heating element and the water pipe can exchange heat.

[0007] According to an embodiment of the present application, the shell comprises a support portion and two first fins arranged at intervals. The first fins are connected to the support portion. The support portion and the first fins jointly define a first mounting groove. The heating element is arranged in the first mounting groove.

[0008] In the second form, the first fins are bent and deformed and fit the heating element.

[0009] According to an embodiment of the present application, the shell further comprises two second fins arranged at intervals. One side of the support portion is connected to the first fins, and the other side opposite to the one side is connected to the second fins. The support portion and the second fins jointly define a second mounting groove. The water pipe is arranged in the second mounting groove.

[0010] In the second form, the second fins are bent and deformed and fit the water pipe.

[0011] According to one embodiment of the present application, the shell further comprises a first enclosing part, the first fin is arranged on one side of the support part, and the first enclosing part is arranged on the other side of the support part opposite to the one side;

[0012] The inner wall of the first enclosing part and the inner wall of the support part enclose to form the water pipe, or a water pipe independent of the shell is arranged between the inner wall of the first enclosing part and the inner wall of the support part.

[0013] According to one embodiment of the present application, a protective coating is arranged on the inner wall of the first enclosing part and the inner wall of the support part.

[0014] According to one embodiment of the present application, the shell further comprises a wrapping part, an installation channel is formed between the support part and the wrapping part, the water pipe is arranged in the installation channel, and in the second mode, the part of the wrapping part between the water pipe and the support part is recessed into the installation channel.

[0015] According to one embodiment of the present application, in the first mode, the cross section of the shell is annular, and in the second mode, the shell has a recessed part recessed into the interior of the shell, and the recessed part is located between the water pipe and the heating element.

[0016] According to one embodiment of the present application, a heat-conducting medium is filled in the shell, and the heat-conducting medium is attached to the outer wall of the water pipe and the outer wall of the heating element.

[0017] According to one embodiment of the present application, the wall thickness of the shell is greater than or equal to 0.5 mm and less than or equal to 3 mm.

[0018] And / or, the wall thickness of the water pipe is greater than or equal to 0.2 mm and less than or equal to 2 mm.

[0019] The present application also provides a heating device comprising the composite electric heating water pipe as described above.

[0020] The composite electric heating water pipe provided by the present application has the advantages that the shell is changed from the first mode to the second mode through cold working, the fixing of the water pipe and the heating element is realized, the process is relatively simple, the production cost is reduced, the influence on the water pipe in the process is reduced, the situation of inner circle and outer ellipse is avoided, the water pipe and the heating element are attached to the shell, and the heat exchange efficiency between the water pipe and the heating element is ensured.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is one of the structural schematic diagram of the shell provided by the embodiment of the present application.

[0024] Figure 2 is one of the structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0025] Figure 3 is the second structural schematic diagram of the shell provided by the embodiment of the present application.

[0026] Figure 4 is the second structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0027] Figure 5 is the third structural schematic diagram of the shell provided by the embodiment of the present application.

[0028] Figure 6 is the third structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0029] Figure 7 is the fourth structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0030] Figure 8 is the fifth structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0031] Figure 9 is the sixth structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0032] Figure 10 is the seventh structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0033] Figure 11 is the eighth structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0034] Figure 12 is the ninth structural schematic diagram of the cross section of the composite electric heating water pipe provided by the embodiment of the present application.

[0035] Reference signs:

[0036] 110, housing; 111, recess; 112, support portion; 113, first fin; 114, first mounting groove; 115, second fin; 116, second mounting groove; 117, first enclosing portion; 1171, second enclosing portion; 118, wrapping portion; 119, mounting passage;

[0037] 120, water pipe; 1201, water conveying passage; 121, heating element; 122, heat conducting medium. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0039] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0043] The composite electric heating water pipe and the heating device according to the present application will be described below in combination with Figures 1 to 12 The composite electric heating water pipe and the heating device according to the present application will be described below in combination with

[0044] Referring to Figure 2 As shown in the drawings, the composite electric heating water pipe according to the embodiments of the present application comprises a shell 110, a water pipe 120 and a heating element 121. It should be noted that the water pipe 120 can be independent of the shell 110, or can be integrally formed on the shell 110.

[0045] Specifically, the shell 110 can provide a mounting and fixing position for the water pipe 120 and the heating element 121. The shell 110 has a first form and a second form, and the shell 110 is changed from the first form to the second form by cold working. The shell 110 can be an aluminum alloy piece or a copper alloy piece, etc. For example, the shell 110 can be reshaped by pressing or roll forming, and changed from the first form to the second form. The water pipe 120 is arranged in the shell 110, and the water pipe 120 is used to transport fluid, such as coffee, water, juice, etc. The following will be described taking the water pipe 120 transporting water as an example. The heating element 121 is arranged in the shell 110, and the heating element 121 is used to heat the water in the water pipe 120. The heating element 121 can be an electric heating wire, or, in some embodiments, the heating element 121 can include a heating wire, a heat-conducting layer and an outer protective shell. The heat-conducting layer and the heating wire are arranged in the shell 110, the heat-conducting layer wraps the heating wire, and the heat-conducting layer can be magnesium oxide powder, heat-conducting silicone grease layer, heat-conducting silica gel layer, etc. It can be understood that the extension direction of the heating element 121 is the same as or substantially the same as the extension direction of the water pipe 120, and the heating element 121 and the water pipe 120 can be arranged in parallel. The heating element 121 synchronously heats the water when the water flows in the water pipe 120, achieving instant heating. In the first form, when the water pipe 120 is a component independent of the shell 110, the water pipe 120 and the heating element 121 can be mounted into the shell 110, and in the second form, the water pipe 120 and the heating element 121 are attached to the inner wall of the shell 110, and the heating element 121 and the water pipe 120 can exchange heat.

[0046] Reference Figure 1 Wherein the shell 110 is in the first form, the shell 110 has an opening or the size of the structure on the shell 110 for installing the water pipe 120 and the heating element 121 is greater than the size of the water pipe 120 and the heating element 121, so as to facilitate the installation of the water pipe 120 and the heating element 121. The shell 110 is transformed from the first form to the second form by cold working steps such as press shaping or roller forming. As shown in FIG. 2, Figure 2 Wherein the shell 110 is in the second form, the water pipe 120 and the heating element 121 are relatively fixed to the shell 110. In addition, the water pipe 120 can also be subjected to pipe expansion treatment, so that the water pipe expands outwardly and is in full medium with the shell 110 or the heat-conducting medium 122. For example, a fluid or a powder solid medium with a certain pressure can be introduced into the water pipe to achieve the pipe expansion treatment of the water pipe 120.

[0047] Compared with the process of shrinking and flattening, brazing and the like in the related art, the shell 110 is transformed from the first form to the second form by cold working, and the water pipe 120 and the heating element 121 are fixed at the same time. The process is relatively simple, the production cost is reduced, and the influence on the water pipe 120 in the process can be reduced, so as to avoid the case that the inner circle is elliptical, so that the water pipe 120 and the heating element 121 are kept in close contact with the shell 110, and the heat exchange efficiency between the water pipe 120 and the heating element 121 is ensured. In the length direction of the composite electric heating water pipe, the composite electric heating water pipe can be linear, circular or serpentine, etc.

[0048] According to the composite electric heating water pipe of the embodiment of the present application, the installation of the water pipe 120 and the heating element 121 is realized by transforming the shell 110 between the first form and the second form. The shell 110 is transformed from the first form to the second form by cold working, and the water pipe 120 and the heating element 121 are fixed at the same time. The process is relatively simple, the production cost is reduced, and the influence on the water pipe 120 in the process can be reduced, so as to avoid the case that the inner circle is elliptical, so that the water pipe 120 and the heating element 121 are kept in close contact with the shell 110, and the heat exchange efficiency between the water pipe 120 and the heating element 121 is ensured.

[0049] Figure 2 Wherein the water pipe 120 and the heating element 121 are in close contact with the inner wall of the shell 110, and the water pipe 120 and the heating element 121 exchange heat through the shell 110. Of course, the heat-conducting medium 122 can also be arranged in the shell 110, which will be described in detail hereinafter.

[0050] According to some embodiments of the present application, the wall thickness of the shell 110 is greater than or equal to 0.5 mm and less than or equal to 3 mm, for example, the wall thickness of the shell 110 can be equal to 0.5 mm, 0.8 mm, 1.0 mm, 2.0 mm or 3 mm, to ensure the strength of the shell 110. In some embodiments, the wall thickness of the water pipe 120 is greater than or equal to 0.2 mm and less than or equal to 2 mm, so as to facilitate the heat exchange of the water in the water pipe 120. For example, the wall thickness of the water pipe 120 can be equal to 0.2 mm, 0.5 mm, 1.0 mm, 1.5 mm or 2.0 mm.

[0051] Referring to Figure 1 with Figure 2 As shown, according to some embodiments of the present application, the shell 110 includes a support portion 112 and two spaced first fins 113, the first fins 113 are connected with the support portion 112, the support portion 112 and the first fins 113 jointly define a first mounting groove 114, and the heating element 121 is arranged in the first mounting groove 114. On the one hand, the first fins 113 facilitate deformation processing, which is convenient to process; on the other hand, the first fins 113 and the support portion 112 form the first mounting groove 114 in a groove shape, which facilitates the installation of the heating element 121. In the second mode, the first fins 113 are bent and deformed and are in close contact with the heating element 121.

[0052] As shown in Figure 1 with Figure 3 As shown, when the shell 110 is in the first mode, the first mounting groove 114 is formed between the two first fins 113 and the support portion 112, the two first fins 113 can be parallel, and the heating element 121 can be installed from the opening of the first mounting groove 114. It should be noted that the width of the opening of the first mounting groove 114 should be greater than or equal to the maximum width of the heating element 121, so as to facilitate installation. For example, in the example of Figure 1 , the cross section of the heating element 121 is circular, so as to be in close contact with the inner wall of the shell 110. The width of the opening of the first mounting groove 114 can be equal to the diameter of the heating element 121, which facilitates embedding the heating element 121 into the first mounting groove 114 during installation. As shown in Figure 2 with Figure 4 As shown, the shell 110 is transformed into the second mode by cold processing, at this time, the two first fins 113 are both bent and deformed, and wrap the heating element 121, thereby fixing the heating element 121 and can exchange heat with the heating element 121. In the second mode, the first fins 113 wrap the heating element 121 to increase the contact area between the shell 110 and the heating element 121 as much as possible, to improve the heat exchange speed and reduce heat loss. In the example of Figure 1 , the side of the support portion 112 facing the first mounting groove 114 has an arc-shaped groove, Figure 3In the example shown in FIG. 1, the support portion 112 is flat on the side facing the first mounting groove 114 to match the shape of the heating element 121. It should be noted that the specific shape of the support portion 112 is not limited here, as long as the support portion 112 can be attached to the outer surface of the heating element 121.

[0053] Referring to Figure 1 with Figure 2 As shown in FIG. 1, according to some embodiments of the present application, the shell 110 further comprises two second fins 115 arranged at intervals, and the support portion 112 and the second fins 115 jointly define a second mounting groove 116 in which the water pipe 120 is arranged. On the one hand, the second fins 115 are easy to deform and convenient to process; on the other hand, the second fins 115 and the support portion 112 form the second mounting groove 116 in the form of a groove, which facilitates the installation of the water pipe 120. The first fin 113 and the second fin 115 are respectively located on opposite sides of the support portion 112, and the first fin 113 is connected to one side of the support portion 112, and the second fin 115 is connected to the other side of the support portion 112. In the second form, the second fin 115 is deformed and attached to the water pipe 120 to fix the water pipe 120 and can exchange heat with the water pipe 120.

[0054] As shown in FIG. 1, the shell 110 is in the first form, and the two second fins 115 are arranged at intervals. The two second fins 115 can be parallel in the first form, and the second mounting groove 116 is formed between the two second fins 115. The water pipe 120 is installed from the opening of the second mounting groove 116, and the width of the opening of the second mounting groove 116 can be greater than or equal to the diameter of the water pipe 120 to facilitate the installation of the water pipe 120. Figure 1 and Figure 3 As shown in FIG. 1, the shell 110 is in the first form, and the two second fins 115 are arranged at intervals. The two second fins 115 can be parallel in the first form, and the second mounting groove 116 is formed between the two second fins 115. The water pipe 120 is installed from the opening of the second mounting groove 116, and the width of the opening of the second mounting groove 116 can be greater than or equal to the diameter of the water pipe 120 to facilitate the installation of the water pipe 120. Figure 2 and Figure 4 As shown in FIG. 1, the shell 110 is in the second form, and the two second fins 115 are deformed and attached to the water pipe 120 to fix the water pipe 120 and can directly contact the water pipe 120 for exchange. In the second form, the shell 110 can wrap around the water pipe 120 to increase the contact area with the water pipe 120, improve the heat exchange speed, and reduce the heat loss of the water pipe 120.

[0055] According to some embodiments of this application, the outer casing 110 includes a first enclosure portion 117, a first fin 113 is disposed on one side of the support portion 112, and the first enclosure portion 117 is disposed on the opposite side of the support portion 112. The inner wall of the first enclosure portion 117 and the inner wall of the support portion 112 form a water pipe 120. Thus, in the manufacturing process of the composite electric heating water pipe, only the first fin 113 needs to be cold-worked to fix the heating element 121, simplifying the manufacturing process. Furthermore, the water directly contacts the outer casing 110 for heat exchange, improving heat exchange efficiency. Alternatively, the water pipe 120 can be disposed within the first enclosure portion 117 and the support portion 112.

[0056] See Figure 5 As shown, the first enclosure 117 has an arched cross-section, and both ends of the first enclosure 117 are connected to the support 112. A water conveying channel 1201 is formed between the first enclosure 117 and the support 112, and the water conveying channel 1201 is used to convey water. During the flow of water within the water conveying channel 1201, heat exchange occurs between the water and the heating element 121 through the first enclosure 117 and the support 112. Figure 6 As shown, the outer casing 110 is in the second configuration, and the heating element 121 is disposed within the first mounting groove 114 formed by two first fins 113. Both first fins 113 are bent and deformed toward the heating element 121 and fit against the heating element 121. In some embodiments, a protective coating is provided on the inner wall of the first enclosure portion 117 and the inner wall of the support portion 112 to enhance the wear resistance, improve oxidation resistance, and extend the service life of the water pipe 120. The protective coating can be an epoxy resin coating, a polyethylene coating, etc.

[0057] like Figure 12 As shown, in some embodiments, the support portion 112 has two opposing sides, with a first enclosure portion 117 located on one side. The cross-section of the first enclosure portion 117 is annular, and both ends of the first enclosure portion 117 are connected to the support portion 112. A second enclosure portion is provided on the other side. The second enclosure portion is annular, and both ends of the second enclosure portion are connected to the support portion 112. The heating element 121 is disposed between the second enclosure portion and the support portion 112, and a heat-conducting medium 122 is filled between the heating element 121, the second enclosure portion, and the support portion 112 to fix the heating element 121 and improve the heat conduction performance of the composite electric heating water pipe.

[0058] According to some embodiments of this application, in conjunction with Figure 7The shell 110 includes a wrapping portion 118, and a mounting channel 119 is formed between the support portion 112 and the wrapping portion 118. The water pipe 120 is arranged in the mounting channel 119, so that the water pipe 120 can be replaced during later maintenance, and the cost of later maintenance is low. In the second mode, the part of the wrapping portion 118 between the water pipe 120 and the wrapping portion 118 is recessed into the mounting channel 119 to fix the water pipe 120 and be in contact with the water pipe 120 for heat exchange. Referring to Figure 7 As shown in the figure, one side of the support portion 112 is provided with two spaced-apart first fins 113, and the opposite side is provided with the wrapping portion 118. The heating element 121 is arranged between the two first fins 113. In the second mode, the first fins 113 are bent and deformed and are in contact with the heating element 121 to fix the heating element 121. The bent and deformed first fins 113 wrap the heating element 121 in the circumferential direction to reduce heat loss of the heating element 121 and increase the contact area between the shell 110 and the heating element 121, thereby improving the heat exchange speed. The wrapping portion 118 is arched, and both ends of the wrapping portion 118 are connected to the support portion 112. The mounting channel 119 of the water pipe 120 is formed between the wrapping portion 118 and the support portion 112. After the water pipe 120 is mounted in the mounting channel 119, the part of the wrapping portion 118 between the water pipe 120 and the support portion 112 can be pressed and deformed into the mounting channel 119 to be in contact with the water pipe 120 for heat exchange and to fix the water pipe 120. In some embodiments, a heat-conducting material such as magnesium oxide powder can be filled between the inner wall of the mounting channel 119 and the water pipe 120.

[0059] According to some embodiments of the present application, the shell 110 is filled with a heat-conducting medium 122, which is in contact with the outer wall of the water pipe 120 and the outer wall of the heating element 121. Referring to Figure 8 As shown in the figure, the cross section of the shell 110 is annular, and the water pipe 120 and the heating element 121 are arranged in the shell 110. The water pipe 120 and the heating element 121 can be arranged in a spaced-apart manner or in contact. The heat-conducting medium 122 can be magnesium oxide powder, heat-conducting silicone grease, heat-conducting silica gel, etc. The heat-conducting medium 122 is filled between the water pipe 120 and the inner wall of the shell 110 and between the heating element 121 and the inner wall of the shell 110. On the one hand, the heat-conducting medium 122 can better contact the water pipe 120 and the heating element 121, significantly reduce the contact thermal resistance, promote heat conduction, reduce heat loss, and effectively improve the heat-conducting performance of the composite electric heating water pipe. On the other hand, the water pipe 120 and the heating element 121 can be fixed by the heat-conducting medium 122. The structure of the shell 110 deforms less, the processing procedure of the shell 110 can be simplified, the influence on the water pipe 120 and the heating element 121 during processing is reduced, and the deformation of the water pipe 120 and the heating element 121 is reduced.

[0060] According to some embodiments of the present application, in the first form, the cross section of the shell 110 is annular, for example, the cross section of the shell 110 can be an annular structure in the shape of an ellipse, a circle or a square, etc. In the second form, the shell 110 has a recess 111 recessed to the inside of the shell 110, and the recess 111 is located between the water pipe 120 and the heating element 121. In this way, when assembled, the water pipe 120 and the heating element 121 are arranged in the shell 110, and the part of the shell 110 between the water pipe 120 and the heating element 121 is extruded to the inside of the shell 110 to form a recess 111 by rolling or the like, so that the shell 110 is attached to the water pipe 120 and the heating element 121.

[0061] For example, the shell 110 in the first form can be an annular structure in the shape of an ellipse, the water pipe 120 and the heating element 121 are both installed in the shell 110, the outer wall of the water pipe 120 and the outer wall of the heating element 121 are attached, and the part of the shell 110 between the water pipe 120 and the heating element 121 is extruded to the inside of the shell 110 to form a recess 111, so that the shell 110 is changed to the second form. As shown in Figure 9 each of the left and right sides of the water pipe 120 (in the direction shown in Figure 9 , a recess 111 is formed, at this time, the shell 110 is in the shape of 8. As shown in Figure 11 In some embodiments, the water pipe 120 and the heating element 121 can not be in contact, the shell 110 is cold worked so that the shell 110 is attached to the water pipe 120 and the shell 110 is in the shape of 8, and the heating element 121 and the inner wall of the shell 110, and the water pipe 120 between the heating element 121 can be filled with a heat conducting medium 122 to fix the heating element 121, and at the same time, improve the heat transfer efficiency between the heating element 121 and the water pipe 120.

[0062] Or, as shown in Figure 10 In some embodiments, the shell 110 in the first form can be an annular structure in the shape of an ellipse, after the water pipe 120 and the heating element 121 are installed in the shell 110, the water pipe 120 and the heating element 121 are spaced apart, on both sides of the distribution direction of the water pipe 120 and the heating element 121, and between the water pipe 120 and the heating element 121, there is a part of the shell 110 that does not contact the water pipe 120 and the heating wire. For example Figure 10 In the above-mentioned Figure 10 , the part of the shell 110 on the right side is recessed to the inside to form a recess 111 (as shown in Figure 10The dashed line in the figure indicates the position of the housing 110 of the recessed portion 111 in the first form), the recessed portion 111 is close to or in contact with the left inner wall of the housing 110. At this time, the composite electric heating water pipe is approximately B-shaped to fix the water pipe 120 and the heating element 121, while ensuring the heat transfer efficiency between the water pipe 120 and the heating element 121.

[0063] The above composite electric heating water pipe can use a compression shaping mold to force the fins (such as the first fin 113 and the second fin 115) to bend inward and fully contact the water pipe 120 or the heating element 121. Alternatively, a set of extrusion rollers can be used for roll forming, gradually forcing the fins to bend inward and fully contact the water pipe 120 or the heating element 121.

[0064] According to the embodiments of the present application, the material of the water pipe 120 can be various stainless steels, and the inner wall of the water pipe 120 can be coated. When the water pipe 120 is integrally formed in the housing 110, the water pipe 120 can be formed by the closed area in the support portion 112, or can be directly formed by the closed area of the housing. The heating element 121 is a surface heating element after being connected to the power supply, and the heating surface material can be aluminum and its alloy, or copper and its alloy, or various stainless steels (electric heating wire); the housing 1110 is wrapped outside the water pipe 120 and the heating element 121, and it can be a metal structural member with heat conduction function.

[0065] According to the heating device of the embodiments of the present application, the heating device can be a coffee machine, a steam oven, an instant hot water machine, etc. The heating device includes the above composite electric heating water pipe, which is used to transport fluid and can heat the fluid, and can realize liquid instant heating.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the present application, and are not limited to the present application. Although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and should be covered in the scope of the claims of the present application.

Claims

1. A composite electrically heated water pipe, characterized by, The utility model relates to a water heating device, comprising: a housing (110) having a water pipe (120) disposed therein, the housing (110) having a first form and a second form, the housing (110) being transformed from the first form to the second form by cold working; a heating element (121) disposed in the housing (110); in the first form, the heating element (121) is mountable in the housing (110), in the second form, the heating element (121) is fixedly opposite to the water pipe (120), and heat exchange is available between the heating element (121) and the water pipe (120).

2. The composite electrically heated water pipe of claim 1, wherein, the housing (110) comprises a support portion (112) and two first fins (113) disposed at intervals, the first fins (113) being connected to the support portion (112), the support portion (112) and the first fins (113) jointly defining a first mounting groove (114), the heating element (121) being disposed in the first mounting groove (114); in the second form, the first fins (113) are deformed and fit the heating element (121).

3. The composite electrically heated water pipe of claim 2, wherein, the housing (110) further comprises two second fins (115) disposed at intervals, the first fins (113) being connected to one side of the support portion (112), the second fins (115) being connected to the opposite side, the support portion (112) and the second fins (115) jointly defining a second mounting groove (116), the water pipe (120) being disposed in the second mounting groove (116); in the second form, the second fins (115) are deformed and fit the water pipe (120).

4. The composite electrically heated water pipe of claim 2, wherein, the housing (110) further comprises a first enclosing portion (117), the first fins (113) being disposed on one side of the support portion (112), the first enclosing portion (117) being disposed on the opposite side of the support portion (112); an inner wall of the first enclosing portion (117) and an inner wall of the support portion (112) jointly form the water pipe (120), or a water pipe (120) independent of the housing (110) is disposed between the inner wall of the first enclosing portion (117) and the inner wall of the support portion (112).

5. The composite electrically heated water pipe of claim 4, wherein, the inner wall of the first enclosing portion (117) and the inner wall of the support portion (112) are both provided with a protective coating.

6. The composite electrically heated water pipe of claim 2, wherein, the housing (110) further comprises a wrapping portion (118), the support portion (112) and the wrapping portion (118) forming a mounting channel (119), the water pipe (120) being disposed in the mounting channel (119), in the second form, a portion of the wrapping portion (118) between the water pipe (120) and the support portion (112) is recessed into the mounting channel (119).

7. The composite electrically heated water pipe of claim 1, wherein, In the first form, the cross section of the shell (110) is annular; in the second form, the shell (110) has a recess (111) recessed to the inside of the shell (110), and the recess (111) is located between the water pipe (120) and the heating element (121).

8. The composite electrically heated water pipe according to any one of claims 1 to 7, wherein The shell (110) is filled with a heat-conducting medium (122) which is in contact with the outer wall of the water pipe (120) and the outer wall of the heating element (121).

9. The composite electrically heated water pipe according to any one of claims 1-7, wherein, The wall thickness of the shell (110) is greater than or equal to 0.5 mm and less than or equal to 3 mm; And / or, the wall thickness of the water pipe (120) is greater than or equal to 0.2 mm and less than or equal to 2 mm.

10. A heating apparatus, characterized by The composite electric heating water pipe comprises the composite electric heating water pipe according to any one of claims 1 to 9.

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