Heating device for cleaning range hood and range hood

Abstract

The utility model relates to a heating device for cleaning an extractor hood and the extractor hood, the heating device comprises a water pump, a heater and an integrated shell, and the water pump and the heater are both arranged in the integrated shell. The integrated shell comprises a shell body and a cover body, openings are formed in the top and the side of the shell body, the cover body detachably covers the openings in the top and the side of the shell body, the water pump and the heater are arranged in an up-down layered mode, and a connecting pipe used for establishing a communicating water path between the water pump and the heater is arranged at the opening in the side of the shell body. The heating device has the advantages that the assembly process can be effectively simplified, the assembly difficulty is reduced, and the production efficiency of the heating device is improved.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a heating device for cleaning a range hood and a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Most existing range hoods are equipped with a self-cleaning system, which typically uses steam or hot water for cleaning. The self-cleaning system requires a water pump and a heating device to produce hot water or steam. Usually, the water pump draws water and supplies it to the heater to produce hot water or steam.

[0003] Different range hood models typically only differ in the installation location of their heating devices. The heaters and water pumps themselves generally use the same modules, meaning the same system is often used across different models. Therefore, the water pumps and heaters themselves are highly versatile. However, due to installation location limitations, the water pumps and heaters need to be placed in different locations for different models. Specifically, the traditional layout is a separate installation, with the water pump and heater installed separately. This layout has several drawbacks: firstly, the mounting holes and structures of the modules need to change depending on the location; secondly, different installation locations result in varying lengths of connecting pipes, leading to different module specifications; and thirdly, separate module installation creates additional structures, such as separate protective covers for the water pump and heating modules, or even additional fixing structures to integrate them. This results in poor module versatility, a greater variety of materials, higher module costs, and slower overall assembly speed due to separate installation, reducing the output per unit time and increasing assembly costs.

[0004] Some layouts employ integrated installation, where the water pump and heating module are installed together. This approach often uses a parallel or stacked installation structure for the pump and heater. However, for this type of installation, the housing for the pump and heater is typically an integrated housing with only one open side (e.g., an open top). This integrated housing design presents several problems: First, the open-on-the-inside design restricts the assembly path of internal components. Operators must strictly adhere to a sequential order (e.g., installing the pump first, then the heater, or vice versa) for component assembly, repeatedly adjusting component angles within a confined space to achieve proper positioning. This sequential assembly process significantly increases operational complexity, especially when there are pipeline connections or fastener requirements between components. The cramped workspace easily leads to misalignment and damage to connectors. Second, it suffers from deficiencies in assembly efficiency and operational convenience. Because the housing provides only a single assembly opening, operators must simultaneously complete the positioning, fixing, and pipeline connection of multiple components within a limited three-dimensional space. For example, in a stacked structure, the installation of upper-layer components can obstruct the operating interface of lower-layer components, forcing the assembly process to include temporary disassembly or tool avoidance steps. On the other hand, when the heating device requires maintenance, the single-sided open structure also limits the removability of components. If it is necessary to replace components located at the bottom of the housing (such as water pump-related parts), the upper heating module and its associated piping must be removed first. This non-modular design increases maintenance time and costs, and repeated disassembly and reassembly can easily lead to secondary malfunctions.

[0005] Therefore, the existing heating devices for cleaning range hoods need further improvement. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a heating device for cleaning range hoods that can effectively simplify the assembly process, reduce assembly difficulty, and improve production efficiency, in light of the current state of the technology.

[0007] The second technical problem to be solved by this utility model is to provide a range hood that uses the above-mentioned heating device, in view of the current state of the prior art.

[0008] The technical solution adopted by this utility model to solve the first technical problem is as follows: a heating device for cleaning a range hood, including a water pump, a heater, and an integrated housing. The water pump and the heater are both located inside the integrated housing. The integrated housing includes a shell body with openings on the top and sides, and a cover that can be detachably installed on the top and side openings of the shell body. The water pump and the heater are arranged in layers, and a connecting pipe for establishing a water passage between them is arranged at the side opening of the shell body.

[0009] To further optimize the spatial layout of the heater and water pump, the heater is a laterally extending cavity heater, and the water pump also extends laterally as a whole. The positions where the water pump connects to the connecting pipe and the positions where the heater connects to the connecting pipe are located on the same side in the lateral direction. This laterally extending cavity heater and water pump connected on the same side simplifies the piping routing, avoids pipe crossings and tangles, saves lateral space, and avoids the problem of the heating device being too large in one direction, making its structure more compact and easier to install in confined environments.

[0010] Considering that an improper orientation of the water pump interface would cause difficulties in connecting external pipelines, both the inlet and outlet ports of the water pump are designed to face the side opening of the housing body. This structural design, with a unified side opening for the interfaces, facilitates standardized connection operations and saves assembly and installation time.

[0011] To improve assembly and disassembly efficiency, the heater is located above the water pump. The heater is inserted into the housing body from the top opening downwards, while the water pump is inserted laterally into the housing body from the side opening. This layered design with different installation directions enables modular and quick assembly and disassembly, improving the overall efficiency.

[0012] To ensure stable installation of the heat insulation shell within the integrated housing, an additional heat insulation shell surrounding the heater is included. This shell body comprises a front side plate and a rear side plate, each with an inner side plate extending from the front and rear sides for supporting the bottom of the heat insulation shell. The front and rear side plates also have a first limiting rib and a second limiting rib, respectively, for positioning on the left and right sides of the integrated housing. The first support rib provides bottom support, and the first / second limiting rib restricts lateral displacement to prevent shifting due to operational vibration.

[0013] To achieve a stable and vibration-resistant installation of the water pump, a water pump mounting base is also included. The bottom of the mounting base has an outwardly extending limiting flange, and the housing body further defines a mounting groove into which the limiting flange is inserted laterally. The water pump mounting base can be made of vibration-damping material, wherein the insertion and engagement of the limiting flange with the mounting groove restricts horizontal displacement, and combined with screw fixing, forms a double vibration-damping structure.

[0014] The top opening and side opening of the shell body are connected. To accommodate this, the cover body is L-shaped and includes a first cover plate and a second cover plate connected in sequence. The first cover plate covers the top opening of the shell body, and the second cover plate covers the side opening of the shell body.

[0015] To simplify the installation structure between the shell body and the cover, the first cover has a downwardly extending insert along its peripheral edge, the inner side of the peripheral edge of the top opening of the shell body has a protruding rib protruding toward the interior of the shell body, the rib has a slot for the insert to be inserted from top to bottom, the inner side of the side opening of the shell body has an inwardly protruding positioning protrusion, and the peripheral edge of the second cover has a second flange extending toward the interior of the shell body, the second flange has a positioning recess for the positioning protrusion to be engaged.

[0016] To achieve a tight fit between the first cover plate and the shell body, the peripheral edge of the first cover plate has a downward-folded first flange, the bottom of which abuts against the protruding rib. The insert extends downward from the bottom of the first flange and is inserted into the slot. After the first cover plate is assembled in place, its top surface is flush with the edge of the top opening of the shell body, ensuring the overall aesthetics of the integrated shell.

[0017] The technical solution adopted by this utility model to solve the second technical problem is: a range hood, including a housing and a heating device, wherein the heating device is the above-mentioned range hood cleaning heating device, and the heating device is disposed on the inner or outer side wall of the housing.

[0018] Compared with existing technologies, the advantages of this utility model are as follows: First, the double-opening design of the top and side of the integrated shell body breaks the limitations of the traditional single-side opening, providing a multi-dimensional assembly path, allowing the water pump and heater to be installed independently and in parallel without strictly following the order. Operators can simultaneously position and fix the components from different directions, avoiding repeated disassembly and assembly caused by component obstruction, significantly reducing assembly complexity and the risk of misalignment. Second, the upper and lower layered layout combined with the connecting pipe design at the side opening ensures structural compactness while reserving intuitive operating space for pipe connections, eliminating the need to adjust angles in confined spaces and improving assembly efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the heating device according to another embodiment of the present utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the heating device according to another embodiment of the present utility model;

[0022] Figure 4 This is an exploded view of the heating device according to an embodiment of the present invention;

[0023] Figure 5This is a three-dimensional structural diagram of the shell body of the heating device according to an embodiment of the present utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the cover of the heating device according to an embodiment of the present utility model;

[0025] Figure 7 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present invention, excluding the integrated outer shell;

[0026] Figure 8 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present invention, omitting the integrated outer shell;

[0027] Figure 9 This is an exploded view of the heat insulation shell of the heating device according to an embodiment of the present utility model;

[0028] Figure 10 This is a cross-sectional perspective view of the heating device according to an embodiment of the present utility model, cut along the front-back direction. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0031] Figures 1-10 This illustration shows a preferred embodiment of the heating device for cleaning a range hood and the range hood itself. The range hood includes a housing and a centrifugal fan housed within the housing. The housing generally includes a fan frame and a smoke collection hood located at the bottom of the fan frame, with the inner cavity of the fan frame communicating with the inner cavity of the smoke collection hood. An air inlet is provided on the front side wall of the smoke collection hood, allowing external fumes to enter the hood. The centrifugal fan, located within the fan frame, generates negative pressure during operation, drawing external fumes into the smoke collection hood through the air inlet. An oil filter is also provided at the air inlet of the smoke collection hood for filtering fumes. An oil cup, which is a long, horizontally extending strip, is located at the bottom of the smoke collection hood to collect oil stains flowing down from it.

[0032] Range hoods also include a cleaning system, which can be automatically activated based on actual usage (i.e., a self-cleaning system) or manually activated by the user. The cleaning system typically includes a heating element and a nozzle assembly. The nozzle assembly is connected to a cleaning medium supply device via piping, thus spraying the cleaning medium onto the impeller of the range hood. The cleaning medium is generally steam or hot water, or a mixture of steam and hot water, and is primarily heated by the heating element to produce the hot water or steam.

[0033] See Figures 4-10 The heating device for cleaning a range hood in this embodiment includes an integrated housing 1, a water pump 4, and a heater 5. The integrated housing 1 has a vertically layered structure, with the heater 5 mounted on the upper layer and the water pump 4 mounted on the lower layer. The heater 5 is a horizontally extending cavity heater 5, fixed to the upper layer of the integrated housing 1, and its inlet end is connected to the outlet end of the water pump 4 on the lower layer via a connecting pipe 71. The water pump 4 is also arranged horizontally, with its inlet end connected to an external water source via an inlet pipe 81, and its outlet end connected to the inlet end of the heater 5 via a connecting pipe 71. The term "horizontally extending" cavity heater 5 can be understood as meaning that the length direction of the heater extends horizontally, such as extending left or right. The term "horizontally extending" water pump can be understood as meaning that the main body of the water pump (primarily a motor, whose axial direction can generally be considered the length direction of the water pump) extends horizontally, such as extending left or right. The outlet end of the water pump 4 (i.e., the position connected to the connecting pipe 71) and the inlet end of the heater 5 (i.e., the position connected to the connecting pipe 71) are located on the same side in the lateral direction, thereby avoiding pipe crossings and shortening the pipe path as much as possible. The connecting pipe 71 has an overall side-mounted U-shaped structure. Both the cavity heater 5 and the water pump 4 are arranged laterally and are designed in layers in the vertical direction, simplifying the pipe routing, saving lateral space, avoiding the problem of the heating device being too large in one direction, making its structure more compact, and facilitating installation in narrow environments.

[0034] The heating element of the cavity heater 5 is embedded in the heater body by die casting. The heater 5 must have sufficient volume to ensure that steam can still be produced at the outlet when a large flow water pump 4 is used to feed water. It also ensures that the heater 5 has enough space to accommodate scale. Generally, the volume should be at least 30mL. At the same time, the internal flow gap should be at least 8-10mm to avoid scale blockage.

[0035] The water pump 4 and heater 5 of the heating device are housed within the integrated housing 1, with the overall structure arranged vertically, with the heater 5 on top and the water pump 4 on the bottom. This layout prevents water in the connecting pipe 71 from flowing into the heater 5 due to gravity during water supply. The water in the connecting pipe 71 isolates the heat from the water pump 4, avoiding damage caused by steam or hot water backflow. It also prevents the backflow of hot air or scale-laden hot air from affecting the lifespan of the water pump 4, reducing the likelihood of water pump 4 failures. The heater 5 and water pump 4 are mounted together through the integrated housing 1, eliminating the need for additional brackets and protective covers. The connecting pipe 71 is also effectively shortened, eliminating the need for screw connections to the heater 5. Furthermore, the housing avoids welding, thus reducing material costs. Integrating the heater 5 and water pump 4 into a single housing reduces the number of separate components, increases assembly line speed, lowers costs, reduces external installation interfaces, improves versatility, and facilitates the module's installation on different models.

[0036] See Figures 4-6 In this embodiment, the integrated housing 1 is a flat, square-shaped shell, comprising a housing body 11 and a cover 12. The housing body 11 has openings at the top and sides, with the top opening 113 communicating with the side opening 114. Correspondingly, the cover 12 is L-shaped, comprising a first cover plate 121 and a second cover plate 122 connected sequentially. The first cover plate 121 covers the top opening 113 of the housing body 11, and the second cover plate 122 covers the side opening 114 of the housing body 11. A connecting pipe 71 for establishing a water passage between the water pump 4 and the heater 5 is located at the side opening 114 of the housing body 11. Considering that an improper orientation of the water pump 4's inlet port would cause difficulties in connecting external pipes, both the inlet and outlet ports of the water pump 4 are oriented towards the side opening 114 of the housing body 11. The water inlet pipe 81 passes through the second cover plate 122 of the cover body 12 and connects to the water inlet port of the water pump 4. The second cover plate 122 of the cover body 12 has a second clearance hole 120 for the water inlet pipe 81 to pass through. The second clearance hole 120 is a non-closed hole that extends to the bottom side edge of the second cover plate 122, so that the water inlet pipe 81 will not affect the upward disassembly of the cover body 12.

[0037] The inlet pipe 81 is a transparent silicone tube installed at the inlet port of the water pump 4. It should have a wall thickness of at least 1.5mm to prevent the negative pressure of the water pump 4 from causing the tube to collapse and prevent water from entering. To reduce costs, the inlet port connection does not require clamps; instead, the pump 4 suction port and the silicone tube are connected via an interference fit. Both ends of the connecting pipe 71 are clamped together, and the outlet of the water pump 4 and the inlet of the heater 5 must be connected with an inverted connection to prevent the pipes from detaching due to excessive inlet pressure. The outlet port of the heater 5 is connected to the outlet pipe 91, which is also clamped together. The outlet port must also be designed with an inverted connection to prevent the connection from detaching due to high internal pressure. The connecting pipe 71 and the outlet pipe 91 of the heater 5 are made of silicone with an outer braided fiber (inner silicone, outer fiber) to prevent excessive pressure and bulging or bursting of the pipes under heating conditions.

[0038] The aforementioned connecting pipe 71, inlet pipe 81, and outlet pipe 91 must maintain a certain distance at the bends in the pipes to avoid the inner diameter of the pipe being squeezed and blocked due to the small bending radius on the inner side of the pipe, which would prevent water and air from passing through.

[0039] The first cover plate 121 has downwardly extending inserts 1212 along its peripheral edge (specifically, the front and rear side edges), while the inner side of the peripheral edge of the top opening 113 of the shell body 11 has protruding ribs 116 protruding toward the interior of the shell body 11. The ribs 116 have slots 1160 for the inserts 1212 to be inserted from top to bottom. The rib 116 structure with slots 1160 on the shell body 11 can be formed by stamping the shell body 11 inwards. The inner side of the side opening 114 of the shell body 11 (specifically, the inner side of the front and rear edges) has inwardly protruding positioning protrusions 117. The positioning protrusions 117 are protrusion structures with smooth curved surfaces, while the peripheral edge of the second cover plate 122 has a second flange 1221 extending toward the interior of the shell body 11. The second flange 1221 has positioning recesses 1220 for the positioning protrusions 117 to be engaged with. The positioning protrusion 117 on the shell body 11 and the positioning recess 1220 on the second cover plate 122 are both provided adjacent to the bottom of the corresponding shell body 11 and second cover plate 12. In some embodiments, the peripheral edge of the first cover plate 121 has a downwardly folded first flange 1211, the bottom of the first flange 1211 abuts against the rib 116, and the insert 1212 extends downward from the bottom of the first flange 1211 and is inserted into the slot 1160 of the shell body 11. The front and rear side edges of the second cover plate 122 also have second flanges 1221 extending laterally into the shell, and the positioning recess 1220 is provided on the second flanges 1221.

[0040] When assembling the cover 12 with the shell body 11, the insert 1212 of the first cover plate 121 is aligned with the slot 1160 at the top opening 113 of the shell body 11, and pressed downwards. The first flange 1211 of the first cover plate 121 fits tightly against the inner edge of the top opening 113 of the shell body 11, and the second flange 1221 of the second cover plate 122 fits against the inner edge of the side opening 114 of the shell body 11. After the first cover plate 121 is in place, its top surface is flush with the edge of the top opening 113 of the shell body 11, ensuring the overall aesthetics of the integrated shell 1. Finally, the flange at the end of the first cover plate 121 furthest from the second cover plate 122 can be fixed to the bottom edge of the shell body 11 with screws to prevent the cover 12 from detaching upwards. The gap between the slot 1160 of the shell body 11 and the plate thickness is less than or equal to 1.5 times the plate thickness to prevent excessive gaps from causing wobbling. The height of the positioning protrusions is 3-5 times the wall thickness. After the cover 12 is connected to the shell body 11, they are connected together through the slot 1160, positioning protrusions 117 and other structures. The integrated shell 1 does not use welding as a whole, which reduces costs.

[0041] In this embodiment, the heater 5 is inserted downwards into the shell body 11 through the top opening 113, while the water pump 4 is inserted laterally into the shell body 11 through the side opening 114. This layered design with different installation directions allows for modular and quick assembly and disassembly, improving the efficiency of the process.

[0042] The dual-opening design of the top and side of the shell body 11 of the integrated housing 1 in this embodiment breaks the limitations of the traditional single-side opening, providing a multi-dimensional assembly path. This allows the water pump 4 and heater 5 to be installed independently and in parallel, without strictly adhering to a specific order. Operators can simultaneously position and fix the components from different directions, avoiding repeated disassembly and assembly caused by component obstruction, significantly reducing assembly complexity and the risk of misalignment. The layered layout combined with the connecting pipe 71 design at the side opening 114 ensures structural compactness while reserving intuitive operating space for pipe connections, eliminating the need to adjust angles in confined spaces and improving assembly efficiency.

[0043] See Figure 9 The integrated housing also includes a heat insulation shell 2, which surrounds the heater 5 to prevent heat generated by the heater 5 from radiating to the water pump 4 and adversely affecting its normal operation. The heat insulation shell 2 can be made of microporous fiber material through extrusion molding. The heat insulation shell 2 includes two interlocking half-shells. The interlocking half-shell design achieves full-coverage heat insulation and allows for quick access to internal components through disassembly, reducing maintenance costs. The two half-shells are the front half-shell 21 and the rear half-shell 22.

[0044] Some electrical components of the heater 5, such as the temperature controller 51, are located at the bottom of the heater 5, and the electrical connection terminals of the heating element 52 of the heater 5 are arranged on the left and right sides. The two sides of the heat insulation shell 2 in the lateral direction are provided with wiring clearance holes 25 for the connection terminals of the heater or the passage of the wiring harness, and pipe clearance holes 26 for the passage of pipelines (such as connecting pipe 71 and water outlet pipe 91). To prevent the temperature controller 51 from being damaged by compression, the heat insulation shell 2 is provided with two spaced-apart support platforms 23 for supporting the bottom of the heater 5 upwards. The lower edge of the support platform 23 is supported by reinforcing ribs to prevent breakage. A space 230 is reserved between the heater 5, placed on the support platform 23, and the bottom wall of the heat insulation chamber to accommodate the temperature controller 51. In this embodiment, the heat insulation shell 2 avoids fixing the heater 5 with screws; it can be fixed using the internal limiting structure of the heat insulation shell 2 (such as the support platform 23, inner wall, etc.). The bottom of the heat insulation shell 2 is also provided with a drain hole 24. The bottom drain hole 24 can drain the condensate in time, which can prevent the electrical components from short-circuiting and corroding due to a small amount of air or water leakage inside the heater 5, and play a role in guiding the air flow.

[0045] The shell body 11 includes a front side plate 111 and a rear side plate 112 facing each other, and an L-shaped connecting plate 110 connecting the front side plate 111 and the rear side plate 112. The inner sides of both the front side plate 111 and the rear side plate 112 have relatively extending first support ribs 131 for supporting the bottom of the heat insulation shell 2. The front side plate 111 and the rear side plate 112 also have first limiting ribs 141 and second limiting ribs 142 respectively for limiting the left and right sides of the integrated shell 1. The first support ribs 131 provide bottom support, and the first / second limiting ribs 142 restrict lateral displacement to prevent displacement caused by operational vibration. The two first support ribs 131 and the first limiting ribs 141 and second limiting ribs 142 on the left and right sides respectively form an insertion slot structure for the heat insulation shell 2 to be placed therein. The heater 5 is installed inside the heat-insulating housing 2 to form a separate modular unit, which can be installed from top to bottom through the top opening 113 of the housing body 11. Correspondingly, the water outlet pipe 91 connected to the water outlet end of the heater 5 is an inverted L-shape, that is, the water outlet pipe 91 extends downward after being led out from the water outlet end of the heater 5, and a first clearance hole 16 is provided on the bottom wall of the housing body 11 through which the water outlet pipe 91 passes from top to bottom. The first clearance hole 16 can be an oblong hole, through which the wiring harness of the water pump 4 and the water outlet pipe 91 pass. The wiring harness of the water pump 4 and the water outlet pipe 91 all pass through the bottom first clearance hole 16 to avoid weakening the structural strength of the housing by multiple holes. The edge of the first clearance hole 16 is folded inward and flattened to prevent the metal plate from scratching the speed limiter and the pipeline.

[0046] The front and rear sides of the heat insulation housing 2 abut against the front side plate 111 and rear side plate 112 of the integrated housing 1, respectively. In some embodiments, the front and rear side walls of the heat insulation housing 2 are configured as planar structures that can fit against the front and rear side plates 112 of the integrated housing 1 to increase the contact area. The direct abutment between the front and rear side plates 112 of the integrated housing 1 and the heat insulation housing 2 can effectively eliminate assembly gaps, ensure the stability of the installation of the heat insulation housing 2 and the heater 5, and avoid movement problems.

[0047] The water pump 4 is mounted to the lower layer of the housing body 11 via the water pump mounting base 41. The bottom of the water pump mounting base 41 has an outwardly extending limiting flange 411. Correspondingly, the housing body 11 also defines a mounting groove 170 in which the limiting flange 411 of the water pump mounting base 41 is inserted laterally (i.e., inserted from the side opening 114 of the housing body 11). The inner side of the integrated housing 1 is provided with a connecting leg 17, which can be formed by stamping from the bottom wall or side wall of the integrated housing 1. The mounting groove 170 is formed between the connecting leg 17 and the bottom wall of the integrated housing 1, and the vertical dimensions of the mounting groove 170 are adapted to the thickness of the limiting flange 411 of the water pump mounting base 41.

[0048] The connecting leg 17 has screw holes, and the bottom wall of the integrated housing 1 has a mounting clearance hole 115 corresponding to the mounting groove 170. After the limiting flange 411 of the fixing seat is installed in the mounting groove 170, the operator can drive screws on the outside of the integrated housing, so that the screws pass through the mounting clearance hole 115 to fix the limiting flange 411 to the connecting leg 17. In order to reduce vibration and noise, the water pump fixing seat 41 in this embodiment is a vibration damping component made of vibration damping material, specifically soft rubber material, to avoid large vibration noise during the operation of the water pump 4, and play a role in vibration reduction and noise reduction. The water pump fixing seat 41 has a fixing hole 410, and the main body of the water pump 4 is fixed in the fixing hole 410 by a tight fit (i.e., interference fit). Since the water pump fixing seat 41 can be made of vibration damping material, the insertion fit between the limiting flange 411 and the mounting groove 170 can limit displacement, and the screw fixing forms a double anti-vibration structure.

[0049] The installation process of the heating device in this embodiment is as follows: The water pump 4 is installed onto the water pump mounting base 41, the inlet pipe 81 is installed, and the entire unit is inserted horizontally into the shell body 11 through the side opening 114. Specifically, the wiring harness can be threaded through first, and the water pump mounting base 41 can be pushed into place and secured with screws. The heater 5 is connected to the connecting pipe 71 and the outlet pipe 91. The heat-insulating shell encloses the heater 5 as a whole and is inserted into the upper region of the shell body 11 through the top opening 113. Then, the connecting pipe 71 is connected to the water pump 4. Finally, the top cover is inserted from top to bottom into place and screwed in on the side.

[0050] Since the inlet and outlet connectors of heater 5 are all enclosed inside the integrated housing 1, there is no safety risk. Even if the connectors detach, hot water and steam will not splash out and scald the user. At the same time, the water pump 4 and heater 5 of the heating device are arranged vertically. Although the height will increase, the length will be shortened, making the overall structure more compact and easier to install on the fan frame of the top fan of the range hood. It is generally located in front of or behind the exhaust hood or electrical box, making it easier to adapt to more models. Furthermore, the externally mounted structure requires only four screw positions (set on lug 18), enhancing module versatility. Simultaneously, since the positions of water pump 4 and heater 5 are fixed, the length of connecting pipe 71 is limited, eliminating the need for various sizes. The inlet pipe 81 and outlet pipe 91, due to the limited number of fixed positions on the integrated module (approximately two) and their proximity, can be universally used by determining the longest length. Alternatively, considering cost, only two specifications are needed for the two positions, reducing the overall number of specifications. The heater 5 and water pump 4 are mounted together through the housing, avoiding the need for additional brackets and protective covers. The shortened connecting pipe 71 eliminates the need for screw connections to heater 5, and the housing avoids welding, among other measures, reducing module cost. Assembling the entire integrated module on the assembly line avoids the reduction in line speed caused by centralized assembly processes, increasing line speed and reducing assembly costs.

[0051] The heating device in this embodiment can be mounted on the outside of the range hood casing, typically on top of the fan frame. That is, the heating device is an external heating module. The installation of an external module requires consideration of safety. Firstly, the heat from the heater 5 must not cause excessive temperature rise in the casing. Secondly, the hot end, i.e., the water inlet and outlet of the heater 5, must not be exposed to the outside to avoid scalding the user due to detachment. Therefore, a heat insulation shell 2 is provided inside the integrated casing 1 of the heating device, and the connecting pipe 71 and the water outlet pipe 91, which connect to the water inlet and outlet of the heater 5, are both built into the integrated casing 1.

Claims

1. A heating device for cleaning a range hood, comprising a water pump (4), a heater (5) and an integrated housing (1), said water pump (4) and said heater (5) being arranged in said integrated housing (1), characterized in that: The integrated shell (1) comprises a shell body (11) with openings on the top and the side, and a cover (12) detachably covering the top and side openings (114) of the shell body (11), the water pump (4) and the heater (5) are arranged in layers from top to bottom, and the connecting pipe (71) for establishing a water passage is arranged at the side opening (114) of the shell body (11).

2. The range hood cleaning heating device of claim 1, wherein: The heater (5) is a horizontally extending cavity type heater (5), and the water pump (4) also extends horizontally as a whole, the position where the water pump (4) is connected with the connecting pipe (71) and the position where the heater (5) is connected with the connecting pipe (71) are located on the same side in the horizontal direction.

3. The range hood cleaning heating device of claim 2, wherein: The water inlet port and the water outlet port of the water pump (4) are also directed towards the side opening (114) of the shell body (11).

4. The range hood cleaning heating device of claim 2, wherein: The heater (5) is located above the water pump (4), the heater (5) is downwardly loaded into the shell body (11) from the top opening (113) of the shell body (11), and the water pump (4) is laterally loaded into the shell body (11) from the side opening (114) of the shell body (11).

5. The range hood cleaning heating device of claim 4, wherein: A heat insulation shell (2) surrounding the heater (5) is further included, the shell body (11) comprises front and rear side plates (111) and (112), the inner sides of the front and rear side plates (111) and (112) are provided with first support rib plates (131) extending oppositely for supporting the bottom of the heat insulation shell (2), and the front and rear side plates (111) and (112) are further respectively provided with first and second limiting rib plates (141) and (142) for limiting the left and right sides of the integrated shell (1).

6. The range hood cleaning heating device of claim 4, wherein: A water pump fixing seat (41) for fixing the water pump (4) is further included, the bottom of the water pump fixing seat (41) is provided with an outwardly extending limiting protrusion (411), and the shell body (11) is further defined with a mounting groove (170) for laterally inserting the limiting protrusion (411) therein.

7. The range hood cleaning heating device according to any one of claims 1 to 6, characterized in that: The cover (12) is in an L shape as a whole, comprising a first cover plate (121) and a second cover plate (122) connected in sequence, the first cover plate (121) covers the top opening (113) of the shell body (11), and the second cover plate (122) covers the side opening (114) of the shell body (11).

8. The range hood cleaning heating device of claim 7, wherein: The peripheral edge of the first cover plate (121) has a downwardly extending tab (1212), the inner side of the peripheral edge of the top opening (113) of the casing body (11) has a convex rib (116) protruding towards the interior of the casing body (11), the convex rib (116) has a slot (1160) therein for the tab (1212) to be inserted into from top to bottom, the inner side of the edge of the side opening (114) of the casing body (11) has a positioning protrusion (117) protruding inwardly, the peripheral edge of the second cover plate (122) has a second flange (1221) extending towards the interior of the casing body (11), the second flange (1221) has a positioning recess (1220) therein for the positioning protrusion (117) to be clamped into.

9. The range hood cleaning heating device of claim 8, wherein: The peripheral edge of the first cover plate (121) has a downwardly folded first flange (1211), the bottom of the first flange (1211) abuts against the convex rib (116), the tab (1212) extends downwardly from the bottom of the first flange (1211) and is inserted into the slot (1160).

10. A range hood comprising a housing and a heating device, characterized in that: The heating device adopts the heating device for cleaning a range hood according to any one of claims 1-9, and is arranged on the inner side wall or the outer side wall of the casing.

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