Thick film heating device and water supply device

Abstract

The utility model relates to the technical field of water supply devices, in particular to a thick film heating device and a water supply device. The thick film heating device comprises a heater and a cover body, the heater comprises a heating main body and a butt joint support which are connected with each other, and an inner heating water path is arranged in the heating main body and used for being connected with a water path system; the cover body is arranged on the periphery of the heating body in a sleeving mode in the axial direction of the heating body, and the cover body is connected with the butt joint support. Compared with the prior art, the thick film heating device has the advantages that the cover body can be used for buffering or blocking external pressure on the heating main body, so that the probability that the heating main body is damaged due to pressure is reduced, and the stability and durability of the thick film heating device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water supply devices, in particular to a thick film heating device and a water supply device. BACKGROUND

[0002] With the improvement of income level, people have higher requirements for the quality of life, and water supply devices are welcomed by the majority of users because they can output water bodies with temperature and composition meeting the needs of users. In order to enable the water supply device to heat the water body, a heating device is usually arranged for the waterway system of the water supply device, so as to heat the water body in the waterway system.

[0003] The thick film heating device is a common heating device, which has good heating efficiency, temperature control effect and service life, and can adapt to the arrangement of the pipeline in the waterway system. Therefore, the thick film heating device is widely used in water supply devices. However, due to the characteristics of the heating main body part of the thick film heating device, it is not pressure-resistant. However, the structure of the water supply device is compact, and it is easy to press the heating main body during assembly, transportation and maintenance, which brings damage risk to the thick film heating device, greatly affects the stability of the water supply device, and greatly increases the production and maintenance cost. CONTENT OF THE INVENTION

[0004] In view of this, the present application provides a thick film heating device and a water supply device, which can solve the problem of pressure resistance of the thick film heating device.

[0005] To solve the above technical problems, one technical scheme adopted by the present application is to provide a thick film heating device, comprising a heater and a cover body, the heater comprising a heating main body and a butt joint support connected with each other, an inner heating waterway being arranged in the heating main body, the inner heating waterway being used for connecting a waterway system; the cover body being sleeved on the outer periphery of the heating main body along the axial direction of the heating main body, and the cover body being connected with the butt joint support.

[0006] In a specific embodiment, the cover body comprises a first protective cover and a second protective cover, the first protective cover and the second protective cover being detachably connected and enclosing a protection space, and the heating main body being arranged in the protection space.

[0007] In a specific embodiment, the first protective cover comprises a first connecting structure, the second protective cover comprises a second connecting structure, the first connecting structure and the second connecting structure are arranged one by one, one of the first connecting structure and the second connecting structure comprises a hook, and the other comprises a slot, and the hook is detachably embedded in the slot.

[0008] In an embodiment, the first protective cover and the second protective cover are both semi-cylindrical covers, the cover body is a cylindrical cover body, the first protective cover is provided with two first abutting edges parallel to the axial direction, the second protective cover is provided with two second abutting edges parallel to the axial direction, the first connecting structure is uniformly provided along the first abutting edges, the second connecting structure is uniformly provided along the second abutting edges, and the first abutting edges are oppositely arranged with the second abutting edges.

[0009] In an embodiment, the cover body further comprises a hinge assembly. The hinge assembly comprises two hinge arms and a connecting shaft, the hinge arms are connected to the connecting shaft, and the two hinge arms can rotate towards each other or away from each other with the connecting shaft as the axis; the two hinge arms are respectively connected to the first protective cover and the second protective cover, and when the hinge assembly is not subjected to external force, the first protective cover and the second protective cover are surrounded by the hinge assembly.

[0010] In an embodiment, the abutting support is provided with a third connecting structure, at least one of the first protective cover and the second protective cover is provided with a fourth connecting structure, the third connecting structure and the fourth connecting structure are detachably connected; the waterway system comprises a heat exchanger and a main waterway plate, the abutting support is provided with a first drainage pipe and a second drainage pipe, one end of the first drainage pipe is connected to the input end of the inner heating waterway, and the other end is used for connecting the output end of the heat exchanger, one end of the second drainage pipe is connected to the output end of the inner heating waterway, and the other end is used for connecting the input end of the main waterway plate.

[0011] In an embodiment, one of the third connecting structure and the fourth connecting structure comprises a threaded hole, the other comprises a first through hole, the thick film heating device further comprises a threaded part, the threaded part is arranged in the first through hole, and the threaded part is screwed with the threaded hole.

[0012] In an embodiment, the cover body is further provided with at least one temperature detection through hole, the number of the temperature detection through holes is at least one, and the temperature detection through holes are used for mounting a temperature detection device to detect the temperature of the heating main body.

[0013] In an embodiment, the cover body is provided with at least one strip-shaped through hole, the strip-shaped through holes are parallel to the axial direction and are uniformly arranged on the cover body; and / or, the abutting support is provided with a second through hole, the thick film heating device further comprises a threaded part, the threaded part is arranged in the second through hole and is used for being screwed with a body of a water supply device.

[0014] To solve the above technical problems, another technical solution adopted by the present application is to provide a water supply device, comprising a body main body and the thick film heating device according to any one of the above embodiments, the internal heating water path of the thick film heating device is connected with the water path system, and the docking support of the thick film heating device is fixedly connected with the body main body.

[0015] The beneficial effects of the present application include: by arranging the cover coaxial with the heating main body on the outer periphery of the heating main body, and connecting the cover to the docking support, the cover can be isolated between the heating main body and the outside world, so as to buffer or block the pressure of the outside world on the heating main body, thereby reducing the probability of damage of the heating main body under pressure, effectively improving the stability and durability of the thick film heating device, thereby reducing the production, transportation and maintenance cost of the water supply device. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is an assembly structure schematic diagram of an embodiment of the water supply device provided by the present application;

[0018] Figure 2 is an assembly structure schematic diagram of an embodiment of the body main body of the water supply device provided by the present application;

[0019] Figure 3 is an assembly structure schematic diagram of another embodiment of the body main body of the water supply device provided by the present application;

[0020] Figure 4 is an assembly structure schematic diagram of an embodiment of the thick film heating device provided by the present application;

[0021] Figure 5 is an exploded structure schematic diagram of an embodiment of the thick film heating device provided by the present application;

[0022] Figure 6 is a cross-sectional structure schematic diagram of an embodiment of the thick film heating device provided by the present application;

[0023] Figure 7 is another cross-sectional structure schematic diagram of an embodiment of the thick film heating device provided by the present application;

[0024] Figure 8 is an assembly structure schematic diagram of another angle of an embodiment of the thick film heating device provided by the present application.

[0025] Marker Description:

[0026] 1. water supply device; 11. main body; 12. water system; 121. heat exchanger; 122. main water plate; 2. thick film heating device; 21. heater; 211. heating main body; 212. internal heating water path; 22. docking support; 221. first through hole; 222. second through hole; 223. first drainage pipe; 224. second drainage pipe; 3. cover body; 31. fourth connecting structure; 311. screw hole; 32. temperature detection through hole; 33. strip-shaped through hole; 34. first protective cover; 341. clamping hook; 342. first docking edge; 35. second protective cover; 351. clamping groove; 352. second docking edge; 36. protection space; 4. threaded part; 5. threaded sleeve; 6. temperature detection device; axial direction X. DETAILED DESCRIPTION

[0027] In the present application, the terms "provided with", "having", "connected" should be interpreted broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] Also, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to represent other meanings, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0031] In order to make the purposes, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0032] With the improvement of income level, people have higher requirements for the quality of life, and the water supply device is welcomed by the majority of users because it can output water body with temperature and composition meeting the needs of users. In order to enable the water supply device to heat the water body, a heating device is usually arranged for the waterway system of the water supply device, so as to heat the water body in the waterway system.

[0033] The thick film heating device is a common heating device, which has good heating efficiency, temperature control effect and service life, and can adapt to the setting of the pipeline in the waterway system. Therefore, the thick film heating device is widely used in the water supply device. However, due to the characteristics of the heating main part of the thick film heating device, it is not pressure-resistant. However, the structure of the water supply device is compact, and it is easy to press the heating main part during assembly, transportation and maintenance, which brings damage risk to the thick film heating device, greatly affects the stability of the water supply device, and greatly increases the production and maintenance cost.

[0034] In order to improve or solve the above technical problems, the inventors of the present application have made long-term research and put forward at least the following examples.

[0035] Referring to Figures 1-8 , Figure 1 is an assembly structure schematic diagram of an embodiment of the water supply device provided by the present application. Figure 2 is an assembly structure schematic diagram of an embodiment of the main body of the water supply device provided by the present application. Figure 3 is an assembly structure schematic diagram of another embodiment of the main body of the water supply device provided by the present application. Figure 4 is an assembly structure schematic diagram of an embodiment of the thick film heating device provided by the present application. Figure 5 is an exploded structure schematic diagram of an embodiment of the thick film heating device provided by the present application. Figure 6 is a sectional structure schematic diagram of an embodiment of the thick film heating device provided by the present application. Figure 7 is another sectional structure schematic diagram of an embodiment of the thick film heating device provided by the present application. Figure 8 is an assembly structure schematic diagram of another angle of an embodiment of the thick film heating device provided by the present application.

[0036] To solve the above technical problems, the thick film heating device 2 provided by the embodiment of the present application can include a heater 21 and a cover 3. The heater 21 can include a heating body 211 and a docking bracket 22 connected to each other. The heating body 211 can be provided with an internal heating waterway 212 connected to the waterway system 12 of the water supply device 1. The cover 3 is sleeved on the outer periphery of the heating body 211 along the axial direction X of the heating body 211, and the cover 3 is connected to the docking bracket 22.

[0037] In the structure provided by the embodiment, the cover 3 is coaxial with the heating body 211 and is connected to the docking bracket 22, so that the cover 3 is isolated from the outside and the heating body 211. The pressure of the outside on the heating body 211 is buffered or blocked by the cover 3, thereby reducing the probability of damage of the heating body 211 under pressure, effectively improving the stability and durability of the thick film heating device 2, and thereby reducing the production, transportation and maintenance costs of the water supply device 1.

[0038] In an embodiment of the present application, the cover 3 includes a first protective cover 34 and a second protective cover 35. The first protective cover 34 and the second protective cover 35 are detachably connected, and the first protective cover 34 and the second protective cover 35 can enclose a protection space 36 in which the heating body 211 is arranged. The cover 3 divided into two parts can facilitate installation and subsequent maintenance, thereby reducing the production, transportation and maintenance costs of the thick film heating device 2.

[0039] In an embodiment of the present application, the first protective cover 34 can include a first connecting structure, the second protective cover 35 can include a second connecting structure, and the first connecting structure and the second connecting structure are arranged one by one. One of the first connecting structure and the second connecting structure can include a hook 341, and the other of the first connecting structure and the second connecting structure can include a slot 351, and the hook 341 can be detachably embedded in the slot 351. The first protective cover 34 and the second protective cover 35 can be flexibly disassembled by the cooperation of the hook 341 and the slot 351, which facilitates installation and subsequent maintenance, thereby reducing the production, transportation and maintenance costs of the thick film heating device 2.

[0040] In an embodiment of the present application, the first protective cover 34 and the second protective cover 35 are both semi-cylindrical covers, and the cover 3 is a cylindrical cover 3. The first protective cover 34 is provided with two first docking edges 342 parallel to the axial direction X, and the second protective cover 35 is provided with two second docking edges 352 parallel to the axial direction X. The first connecting structure is uniformly arranged along the first docking edge 342, the second connecting structure is uniformly arranged along the second docking edge 352, and the first docking edge 342 and the second docking edge 352 are oppositely arranged.

[0041] The plurality of first connecting structures and the second connecting structure cooperate to improve the tightness of the connection between the first protective cover 34 and the second protective cover 35, thereby improving the compression resistance of the cover body 3. Meanwhile, the two semi-cylindrical covers cooperate to form a cylindrical cover, and the structures at each position can be symmetrically arranged to facilitate installation, and the cover body 3 is uniformly stressed and not easily damaged when being compressed or collided, thereby improving the compression resistance of the cover body 3 and improving the durability and stability of the thick-film heating device 2.

[0042] In an embodiment of the present application, the cover body 3 can further include a hinge assembly. The hinge assembly includes two hinge arms and a connecting shaft, the hinge arms are connected to the connecting shaft, and the two hinge arms can rotate towards each other or away from each other about the connecting shaft. The two hinge arms are respectively connected to the first protective cover 34 and the second protective cover 35, and when the hinge assembly is not subjected to external force, the first protective cover 34 and the second protective cover 35 are surrounded outside the outer periphery of the heating main body 211 under the action of the hinge assembly.

[0043] Further, the first protective cover 34 and the second protective cover 35 can be connected through the hinge assembly, and when it is necessary to install or maintain the heating main body 211, the first protective cover 34 and the second protective cover 35 can be opened, at this time, the cover body 3 is not disassembled, but the first protective cover 34 and the second protective cover 35 are rotated relative to the connecting shaft to expose the heating main body 211, which can conveniently install or maintain the process of the heating main body 211, thereby improving the usability of the thick-film heating device 2.

[0044] In an embodiment of the present application, the docking support 22 is provided with a third connecting structure, at least one of the first protective cover 34 and the second protective cover 35 is provided with a fourth connecting structure 31, and the third connecting structure and the fourth connecting structure 31 are detachably connected. The water system 12 includes a heat exchanger 121 and a main waterway plate 122, and the docking support 22 is provided with a first drainage pipe 223 and a second drainage pipe 224. One end of the first drainage pipe 223 is connected to the input end of the inner heating waterway 212, and the other end of the first drainage pipe 223 is used to connect the output end of the heat exchanger 121. One end of the second drainage pipe 224 is connected to the output end of the inner heating waterway 212, and the other end of the second drainage pipe 224 is used to connect the input end of the main waterway plate 122.

[0045] In the structure provided in the specific embodiment, the third connecting structure and the fourth connecting structure 31 are used to achieve the detachable connection of the cover body 3 and the docking support 22. In the process of maintenance, the first protective cover 34 and the second protective cover 35 can be disassembled, and then the heating main body 211 can be operated. In the process of installation, the heating main body 211 can be installed first, and then the first protective cover 34 and the second protective cover 35 are installed. The operation process is very convenient, and the production and maintenance cost of the thick film heating device 2 is effectively reduced. Moreover, the docking support 22 is used to connect the inner heating waterway 212 into the waterway system 12 of the water supply device 1, so that the fluid can flow between the inner heating waterway 212 and the waterway system 12.

[0046] In a specific embodiment of the present application, one of the third connecting structure and the fourth connecting structure 31 can include a threaded hole 311, and the other of the third connecting structure and the fourth connecting structure 31 can include a first through hole 221. The thick film heating device 2 can further include a threaded member 4, the threaded member 4 is arranged in the first through hole 221, and the threaded member 4 can be screwed with the threaded hole 311, so that the docking support 22 and the cover body 3 can be detachably connected in a screwing manner.

[0047] Optionally, the thick film heating device 2 can further include a screwing sleeve 5, one end of the screwing sleeve 5 is sleeved on one of the third connecting structure and the fourth connecting structure 31 which is provided with the threaded hole 311, and the other end of the screwing sleeve 5 is aligned with the first through hole 221 to screw the threaded member 4. The screwing sleeve 5 can make the connection relationship of the third connecting structure and the fourth connecting structure 31 more compact.

[0048] In a specific embodiment of the present application, the cover body 3 can further be provided with a temperature detection through hole 32, the number of the temperature detection through hole 32 is at least one, and the temperature detection through hole 32 is used to install a temperature detection device 6 to detect the temperature of the heating main body 211. By monitoring the temperature of the heating main body 211, the temperature of the water outlet of the inner heating waterway 212 can be effectively controlled, and the safety can be prevented from being affected by the overheating of the heating main body 211.

[0049] The temperature detection device 6 can be in contact with the heating main body 211 through the temperature detection through hole 32, and then detect the problem of the heating main body 211.

[0050] The temperature detection device 6 can control the heating main body 211 to be powered off when the temperature of the heating main body 211 exceeds a certain preset value, so as to control the upper limit temperature of the water outlet of the inner heating waterway 212. The temperature detection device 6 can also control the heating main body 211 to be powered on when the temperature of the heating main body 211 is lower than a certain preset value, so as to control the lower limit temperature of the water outlet of the inner heating waterway 212.

[0051] Further, the temperature detection through hole 32 and the number of temperature detection devices 6 can be two, and the two temperature detection devices 6 can have different preset upper temperature limit values. When the temperature detection device 6 with a lower preset upper temperature limit value works normally, the temperature of the heating body 211 can be effectively controlled within the preset range. When the temperature detection device 6 with a lower preset upper temperature limit value cannot work normally, the temperature detection device 6 with a higher preset upper temperature limit value can play a backup role, and the heating body 211 can be powered off in time when the temperature of the heating body 211 is too high, thereby avoiding various adverse conditions caused by overheating of the heating body 211.

[0052] In an embodiment of the present application, the cover 3 can be provided with at least one strip-shaped through hole 33. The strip-shaped through hole 33 is parallel to the axial direction X and uniformly arranged on the cover 3, thereby being able to reduce the weight of the cover 3. Further, when the heating body 211 is overheated, the strip-shaped through hole 33 can also be used to help the heating body 211 dissipate heat.

[0053] Optionally, the docking bracket 22 can be provided with a second through hole 222, and the thick film heating device 2 can further include a threaded part 4, which is arranged in the second through hole 222 and can be screwed with the body 11 of the water supply device 1, thereby relatively fixing the thick film heating device 2 with the body 11 of the water supply device 1, and further improving the stability of the thick film heating device 2.

[0054] To solve the above technical problems, the embodiment of the present application can also provide a water supply device 1, which includes a body 11 and a thick film heating device 2 as described in any of the above embodiments. The inner heating waterway 212 of the thick film heating device 2 can be connected with the waterway system 12, so that the water in the waterway system 12 can flow through the inner heating waterway 212 and be heated by the heating body 211. The docking bracket 22 of the thick film heating device 2 can be relatively fixed with the body 11, which can be achieved by screwing the threaded part 4 and the second through hole 222 of the docking bracket 22.

[0055] In the structure provided in the embodiment, by arranging the cover 3 coaxial with the heating body 211 on the outer periphery of the heating body 211 and connecting the cover 3 to the docking bracket 22, the cover 3 can be isolated between the heating body 211 and the outside, thereby buffering or blocking the pressure of the outside on the heating body 211, reducing the probability of damage to the heating body 211 due to pressure, effectively improving the stability and durability of the thick film heating device 2, and thereby reducing the production, transportation and maintenance costs of the water supply device 1.

[0056] In this application, the phrase "embodiment" or "implementation" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It will be explicitly understood by one of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the embodiments of this application can be combined with each other, without contradiction, to form another embodiment of the application, without departing from the spirit and scope of the application.

[0057] Finally, it should be noted that the above implementations are only used to illustrate the technical solutions of the application but not limit the application. Although the application has been described in detail with reference to the above preferred implementations, one of ordinary skill in the art should understand that the technical solutions of the application can be modified or replaced by equivalents without departing from the spirit and scope of the application.

Claims

1. A thick film heating device, characterized in that, a heater (21) comprising a heating body (211) and a docking support (22) connected with each other, the heating body (211) being provided with an internal heating water channel (212) for connecting a water channel system (12); a cover body (3) being sleeved on the outer periphery of the heating body (211) along the axial direction of the heating body (211), and the cover body (3) being connected with the docking support (22).

2. The thick film heating device according to claim 1, characterized in that, the cover body (3) comprises a first protective cover (34) and a second protective cover (35), the first protective cover (34) and the second protective cover (35) being detachably connected to form a protection space (36), and the heating body (211) being arranged in the protection space (36).

3. The thick film heating device according to claim 2, characterized in that, the first protective cover (34) comprises a first connecting structure, the second protective cover (35) comprises a second connecting structure, the first connecting structure and the second connecting structure being arranged in one-to-one correspondence, one of the first connecting structure and the second connecting structure comprising a clamping hook (341) and the other comprising a clamping groove (351), and the clamping hook (341) being detachably embedded in the clamping groove (351).

4. The thick film heating device according to claim 3, characterized in that, the first protective cover (34) and the second protective cover (35) are both semi-cylindrical covers, the cover body (3) is a cylindrical cover, the first protective cover (34) is provided with two first docking edges (342) parallel to the axial direction, the second protective cover (35) is provided with two second docking edges (352) parallel to the axial direction, the first connecting structure is uniformly arranged along the first docking edges (342), the second connecting structure is uniformly arranged along the second docking edges (352), and the first docking edges (342) and the second docking edges (352) are arranged opposite to each other.

5. The thick film heating device according to claim 2, characterized in that, the cover body (3) further comprises a hinge assembly, the hinge assembly comprising two hinge arms and a connecting shaft, the hinge arms being connected with the connecting shaft, and the two hinge arms being capable of rotating towards each other or away from each other with the connecting shaft as the axis; the two hinge arms are connected with the first protective cover (34) and the second protective cover (35) respectively, and when the hinge assembly is not subjected to external force, the first protective cover (34) and the second protective cover (35) are enclosed around the outer periphery of the heating body (211) under the action of the hinge assembly.

6. The thick film heating device according to claim 2, characterized in that, the docking support (22) is provided with a third connecting structure, at least one of the first protective cover and the second protective cover (35) is provided with a fourth connecting structure (31), and the third connecting structure and the fourth connecting structure (31) are detachably connected. The water system (12) comprises a heat exchanger (121) and a main water plate (122), the docking support (22) is provided with a first drainage pipe (223) and a second drainage pipe (224), one end of the first drainage pipe (223) is connected to the input end of the inner heating water path (212), the other end is used for connecting the output end of the heat exchanger (121), one end of the second drainage pipe (224) is connected to the output end of the inner heating water path (212), the other end is used for connecting the input end of the main water plate (122).

7. The thick-film heating device according to claim 6, characterized in that, One of the third connecting structure and the fourth connecting structure (31) comprises a threaded hole (311), the other comprises a first through hole (221), the thick-film heating device (2) further comprises a threaded member (4), the threaded member (4) is arranged in the first through hole (221), and the threaded member (4) is screwed with the threaded hole (311).

8. The thick-film heating device according to claim 1, characterized in that, The cover body (3) is further provided with at least one temperature detection through hole (32), the temperature detection through hole (32) is used for installing a temperature detection device (6) to detect the temperature of the heating main body (211).

9. The thick-film heating device according to claim 1, characterized in that, The cover body (3) is provided with at least one strip-shaped through hole (33), the strip-shaped through hole (33) is parallel to the axial direction and uniformly arranged on the cover body (3); and / or, The docking support (22) is provided with a second through hole (222), the thick-film heating device (2) further comprises a threaded member (4), the threaded member (4) is arranged in the second through hole (222) and is used for screwing with the machine body (11) of the water supply device (1).

10. A water supply device characterized by comprising: Including: The machine body (11) comprises a water system (12) ； The thick-film heating device (2) according to any one of claims 1-9, the inner heating water path (212) of the thick-film heating device (2) is connected with the water system (12), and the docking support (22) of the thick-film heating device (2) is fixedly connected with the machine body (11).

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