Heating device for cleaning range hood and range hood

Abstract

The heating device comprises a water pump, a heater and an integrated shell, the water pump and the heater are both arranged in the integrated shell, the water pump is arranged below the heater, and the water pump and the heater are in water way connection through a connecting pipe. A vertical layered structure is arranged in the integrated shell, a heater mounting position is arranged on the upper layer, and a water pump mounting position is arranged on the lower layer. The heating device has the advantages that the water pump and the heater of the heating device are more reasonable in spatial layout and compact in structure, and adverse effects caused by backflow of steam or hot water are effectively reduced.

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 for 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, there are currently two main layout methods for heating systems: ① Separate installation, where the water pump and heater are installed separately; ② Integrated installation, where the water pump and heating module are installed together in a horizontal layout. For separate installation, firstly, the mounting hole positions and structures of the modules need to change depending on the location; secondly, different installation locations lead to varying lengths of connecting pipes, resulting in different module specifications and types; furthermore, separate module installation creates additional structures, such as separate protective covers for the water pump and heating module, and even additional fixing structures to install the water pump and heating module together. Therefore, this results in poor module versatility, a greater variety of materials, higher module costs, and slower overall assembly speed, reducing the output per unit time and increasing assembly costs. For integrated installation, horizontal integration is currently the most common method. Horizontal integration refers to the inlet pipe connecting to the water pump, the water pump connecting to the heating device, and the heating device connecting to the outlet pipe, with the entire system connected in series in the same direction. The problem with this layout is that being connected in the same direction results in a relatively long overall size. However, the installation environment for range hoods, whether internal or external (i.e., installed on the outside of the top of the fan frame), often doesn't allow for significant space in any one direction, leading to poor overall versatility and a less compact structure. Another issue is that when the water pump and heater are placed at the same height and very close to each other, steam backflow can occur in the water pipe connecting the pump and heater when the steam pressure inside the heater increases. This can impact and damage the pump diaphragm because some water in the pipe will flow into the heater under gravity, creating empty or semi-empty pipes and causing steam backflow.

[0004] Therefore, the heating devices used for cleaning existing range hoods need further improvement. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a heating device for cleaning range hoods that has a more reasonable spatial layout, a more compact structure, and effectively reduces the adverse effects caused by the backflow of steam or hot water, in light of the current state of the technology.

[0006] 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.

[0007] 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 water pump is arranged below the heater. The two are connected by a connecting pipe to establish a water circuit. The interior of the integrated housing has a vertical layered structure. The upper layer is provided with a heater mounting position and the lower layer is provided with a water pump mounting position.

[0008] The heating unit's water pump and heater are housed within an integrated housing, with the overall structure featuring a top-bottom layout: heater on top, pump on the bottom. This arrangement prevents water from flowing into the heater due to gravity during the water supply process. The water in the connecting pipe also isolates the pump from heat, avoiding damage caused by steam or hot water backflow. It also prevents the backflow of hot air or scale-laden air, thus reducing pump lifespan and minimizing malfunctions. The integrated housing eliminates the need for additional brackets and protective covers, effectively shortens the connecting pipes, eliminates screw connections for the heater, and avoids welding, all contributing to lower material costs. This integrated housing reduces the number of separate components, increases assembly line speed, lowers costs, reduces external interface points, improves versatility, and facilitates installation on different models.

[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. The laterally extending cavity heater and the water pump are connected on the same side, which simplifies the pipeline routing, avoids pipeline crossing and entanglement, saves lateral space, and facilitates installation in narrow environments.

[0010] To further block the heat radiation from the heater to the water pump, a preferred embodiment includes an insulating housing surrounding the heater, comprising two interlocking half-shells. This interlocking half-shell design provides full insulation and allows for quick access to internal components through disassembly, reducing maintenance costs.

[0011] As an improvement, a temperature control device is provided at the bottom of the heater, and two spaced-apart support platforms are provided in the heat insulation shell to support the bottom of the heater upwards. A space is reserved between the heater body placed on the support platform and the bottom wall of the heat insulation shell to accommodate the temperature control device. The space formed by the support platform and the bottom wall isolates the temperature control device, preventing it from being damaged by compression, and also making reasonable use of the gap between the two support platforms.

[0012] As an improvement, the bottom of the heat insulation shell is also provided with a drain hole, and both sides of the heat insulation shell in the lateral direction are provided with routing holes for the connection end of the heater or the passage of the wiring harness, as well as routing holes for the passage of pipes. The bottom drain hole can drain condensate in time, avoiding short circuits and corrosion of electrical components caused by small amounts of air or water leakage inside the heater, and also serving to guide the airflow. The routing holes on the sides are used to guide the wiring harness and pipes in a classified manner, avoiding interference and improving safety.

[0013] To ensure the stable installation of the thermal insulation shell within the integrated housing, the integrated housing includes a front panel and a rear panel facing each other. Each front and rear panel has a first support rib extending inwards towards the integrated housing to support the bottom of the thermal insulation shell. The front and rear panels also have a first limiting rib and a second limiting rib, respectively, for limiting the left and right sides of the integrated housing. The first support rib provides bottom support, and the first / second limiting ribs restrict lateral displacement to prevent shifting due to operational vibration.

[0014] To further enhance the tightness of the assembly between the heat insulation shell and the outer shell, the front and rear sides of the heat insulation shell abut against the front and rear side plates, respectively. The front and rear side plates directly abut against the heat insulation shell, eliminating assembly gaps.

[0015] To further block the heat radiation from the heater to the water pump, another preferred solution is to include a heat insulation plate inside the integrated housing, which is placed horizontally between the heater and the water pump. This additional heat insulation plate forms a thermal barrier, reducing the operating temperature of the water pump and preventing performance degradation due to high temperatures. This eliminates the need for the aforementioned heat insulation housing.

[0016] To enable rapid and precise positioning and installation of the heat insulation panel, the inner wall of the integrated housing is provided with a first limiting slot for inserting the peripheral edge of the heat insulation panel. The first limiting slot guides the peripheral edge into the panel, allowing assembly to be completed without additional fasteners and simplifying the installation process.

[0017] To balance the need for secure installation and load-bearing support, the heater is fixed to the top wall of the integrated housing with fasteners. The inner wall of the integrated housing also has a second support rib for providing upward support to the heater. The top fasteners prevent loosening, while the second support rib provides upward support, disperses structural stress, and improves seismic resistance.

[0018] To prevent the temperature control device from being damaged by pressure, a temperature control device is provided at the bottom of the heater, and the heater and the heat insulation plate are spaced apart in the vertical direction.

[0019] To improve the ease of assembly of the components within the integrated outdoor air conditioner, the integrated housing has a rear opening to allow the insulation panel, water pump, and heater to be installed into the housing through this opening. This rear opening design allows for modular component installation, avoiding complex operations in confined spaces and improving assembly efficiency.

[0020] As an improvement, a water outlet pipe connected to the water outlet end of the heater is also included. A first clearance hole is provided on the bottom side wall of the integrated housing, through which the water pump wiring harness and the water outlet pipe both pass. The first clearance hole can be an oblong hole, with all holes passing through the bottom first clearance hole to avoid weakening the structural strength of the housing due to multiple holes.

[0021] 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 integrated housing further defines a mounting groove into which the limiting flange is inserted. The insertion and engagement of the limiting flange with the mounting groove restricts displacement, and combined with screw fixing, forms a double vibration-resistant structure.

[0022] To form the aforementioned mounting groove, the inner side of the integrated housing is provided with a connecting leg. The mounting groove is formed between the connecting leg and the bottom wall of the integrated housing. A mounting clearance hole is provided on the bottom wall of the integrated housing in a region corresponding to the mounting groove. After the limiting flange of the fixing seat is installed in the mounting groove, it is fixed to the connecting leg by screws passing through the mounting clearance hole. The mounting clearance hole facilitates the operator to use external screws to fix the limiting flange to the connecting leg. The connecting leg can be formed by stamping from the bottom wall or side wall of the integrated housing.

[0023] To reduce vibration and noise, a water pump mounting base is also included for fixing the water pump. The water pump mounting base is a vibration damping component made of vibration damping material. The water pump mounting base has fixing holes, and the water pump is fixed in the fixing holes by a tight fit.

[0024] 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.

[0025] Compared with existing technologies, the advantages of this utility model are as follows: The water pump and heater of the heating device are housed within an integrated housing, and the overall structure adopts an upper and lower layout, with the heater on top and the water pump on the bottom. This layout prevents water in the connecting pipe from flowing into the heater due to gravity during the water supply process. The water in the connecting pipe also isolates the heat from the water pump, avoiding damage to the pump caused by steam or hot water backflow. It also prevents the backflow of hot air or hot air carrying scale from affecting the pump's lifespan, reducing pump failures. The heater and water pump are installed together through the integrated housing, eliminating the need for additional brackets and protective covers. The connecting pipe is effectively shortened, eliminating the need for screw connections to the heater. Furthermore, the housing avoids welding, reducing material costs. Integrating the heater and water pump into a single housing reduces the number of separate components, increases the installation speed of the assembly line, lowers costs, reduces external installation interfaces, improves versatility, and facilitates the layout and installation of the module on different models. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the heating device according to Embodiment 1 of this utility model;

[0027] Figure 2 This is a three-dimensional structural schematic diagram of the heating device of Embodiment 1 of this utility model from another angle;

[0028] Figure 3 This is a three-dimensional structural diagram of the heating device of Embodiment 1 of this utility model from another angle;

[0029] Figure 4 This is an exploded view of the heating device according to Embodiment 1 of this utility model;

[0030] Figure 5 This is a three-dimensional structural diagram of the shell body of the heating device according to Embodiment 1 of this utility model;

[0031] Figure 6 This is a three-dimensional structural diagram of the cover of the heating device according to Embodiment 1 of this utility model;

[0032] Figure 7 This is a three-dimensional structural diagram of the heating device of Embodiment 1 of this utility model after omitting the integrated outer shell;

[0033] Figure 8 This is a three-dimensional structural diagram of the heating device of Embodiment 1 of this utility model, after omitting the integrated outer shell, from another angle.

[0034] Figure 9 This is an exploded view of the heat insulation shell of the heating device according to Embodiment 1 of this utility model;

[0035] Figure 10 This is a cross-sectional perspective view of the heating device of Embodiment 1 of this utility model, cut along the front-back direction;

[0036] Figure 11 This is a three-dimensional structural diagram of the heating device in Embodiment 2 of this utility model;

[0037] Figure 12 This is a three-dimensional structural diagram of the heating device in Embodiment 2 of this utility model, showing the angle of its rear side.

[0038] Figure 13 This is a three-dimensional structural diagram of the heating device of Embodiment 2 of this utility model after omitting the integrated outer shell;

[0039] Figure 14 This is a three-dimensional structural diagram of the integrated outer shell of the heating device in Embodiment 2 of this utility model. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] 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.

[0042] Example 1

[0043] Figures 1-10This 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.

[0044] 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.

[0045] 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-type heater structure, fixed to the upper layer of the integrated housing 1. Its water inlet is connected to the water outlet of the water pump 4 on the lower layer via a connecting pipe 71. The water pump 4 is also arranged horizontally, with its water inlet connected to an external water source via an inlet pipe 81, and its water outlet connected to the water inlet of the heater 5 via a connecting pipe 71. The term "horizontally extending" cavity-type heater 5 can be understood as meaning that the length 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 axis direction can generally be considered the length direction of the water pump) extends horizontally, such as extending left or right. The outlet of the water pump 4 (i.e., the location connected to the connecting pipe 71) and the inlet of the heater 5 (i.e., the location connected to the connecting pipe 71) are located on the same side in the lateral direction, thus avoiding pipe crossings and minimizing the pipe path. The connecting pipe 71 has a 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 excessive size of the heating device in one direction, making its structure more compact, and facilitating installation in narrow environments.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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 shell 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Example 2

[0065] Figures 11-14 This illustration shows another preferred embodiment of the heating device for cleaning a range hood and the range hood itself. The difference between this embodiment and Embodiment 1 lies in the structure of the integrated housing 1 and the internal heat insulation method. Specifically, the integrated housing 1 is a one-piece shell with an open rear side, not a closed one. Components such as the water pump 4 and heater 5 are installed through this open rear side. In this embodiment, the heating device can be housed as a built-in module within the range hood housing. Since the built-in module does not involve safety protection—that is, the module is placed inside the housing, installed on the back of the housing next to the fan—the user will not come into contact with it. The housing itself acts as a natural isolation device for the integrated module, so there is no need for comprehensive protection of the heater 5's heat or isolation of the water inlet and outlet.

[0066] This embodiment omits the heat insulation shell 2 of Embodiment 1, adding only a heat insulation plate 3 between the water pump 4 and the heater 5 (in the vertical direction). The heat insulation plate 3 is also inserted into the integrated shell 1 through the rear opening 101. To achieve rapid and accurate positioning and installation of the heat insulation plate 3, a first limiting slot 15 is provided on the inner wall of the integrated shell 1 for the peripheral edge of the heat insulation plate 3 to be inserted. The first limiting slot 15 guides the peripheral edge to be inserted, completing the assembly without additional fasteners and simplifying the installation process. The heat insulation plate 3 is placed horizontally between the heater 5 and the water pump 4. The addition of the heat insulation plate 3 in the middle forms a thermal barrier, reducing the operating temperature of the water pump 4 and preventing the performance degradation of the water pump 4 due to high temperature.

[0067] To balance the need for secure installation and load-bearing support, the heater 5 is fixed to the top wall of the integrated housing 1 using fasteners (such as screws). The inner wall of the integrated housing 1 also has a second support rib 132 for upward support of the heater 5. A portion of the top wall of the integrated housing 1 protrudes downward to form a boss 102 for screws. The top fasteners prevent loosening, and the second support rib 132 provides upward support, disperses structural stress, and improves seismic resistance. In this embodiment, the heater 5 is also a cavity heater 5. A temperature control device 51 is located at the bottom of the heater 5. There are two second support ribs 132, spaced apart along the front-to-back direction, and the temperature control device 51 is located in the gap between the two second support ribs 132. The heater 5 and the heat insulation plate 3 are spaced apart in the vertical direction to prevent the temperature control device 51 from being damaged by pressure from the heat insulation plate 3.

[0068] The integrated housing of the heating device is fixed to the inner back of the casing with three screws. Overall, it is consistent with the external solution in Embodiment 1, the main difference being that the water inlet pipe 81 extends downwards. The water pump mounting base 41 is mounted on the integrated housing 1, fixed to the bottom surface of the integrated housing 1 as in the external solution, and fixed to the connecting leg 17 with screws. The difference is that the installation direction is consistent with the installation direction of the heater 5, that is, both are installed from the rear opening of the integrated housing, and both can be installed simultaneously. The water pump 4 wire passes through the clearance position of the water outlet pipe 91 at the angled position of the heat insulation plate 3, and the heater 5 wiring harness also passes through this position, and is fixed to the integrated housing 1 with tape or cable ties.

[0069] The key structural design of the heating device in this embodiment is basically similar to that of the external solution. The main difference lies in the structure of the heat insulation plate 3 and the integrated housing 1. The purpose of the heat insulation plate 3 is to isolate the heat of the heater 5 and prevent the heat from the bottom surface of the heater 5 from radiating to the water pump 4, which would cause the water pump 4 to overheat. In addition to the heat insulation plate 3, the air between the two is also a good heat insulation medium, which can effectively protect the water pump 4. The thickness of the heat insulation plate 3 is not less than 3mm. The edge of the heater 5's top cover protrudes and has threaded holes on its surface, connecting it to the top wall of the integrated housing 1 to prevent the heater 5 from shaking. In this embodiment, the connecting legs 17 on the integrated housing are folded upward from the left and right sides of the bottom wall to form L-shaped legs. The two mounting slots 170 formed are opposite to each other, fixing the left and right sides of the limiting protrusion 411 of the water pump fixing seat 41. Corresponding clearance holes are opened on the side of the integrated housing 1 to avoid the connection terminals of the heating tube 52 of the heater 5 and to facilitate the routing of wires and pipes. The clearance holes for the two pipes are turned up to avoid scratching the pipe bundles on the sheet metal.

[0070] The integrated shell 1 is integrally molded, and the sides are connected together by connecting buckles 19 to fix the relative positions of the several sides. The connecting buckles 19 can be locked by bending the side sheet metal and the notches 190 on the top and bottom using bent ears to ensure that they cannot be separated from each other from any direction.

[0071] The heating device in this embodiment is a built-in integrated module that can be installed inside the range hood casing. It is generally used in range hood models where there is no space at the top, such as those with the fan positioned at the bottom or center.

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 water pump (4) is arranged below the heater (5), and the two are connected by a connecting pipe (71) to form a water circuit, and the integrated shell (1) is internally provided with a vertical layered structure, an upper layer is provided with a heater (5) mounting position, and a lower layer is provided with a water pump (4) mounting position.

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, and 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: Further comprising a heat insulation shell (2) surrounding the heater (5), and the heat insulation shell (2) comprises two half shells capable of being connected by buckling.

4. The range hood cleaning heating device of claim 3, wherein: The bottom of the heater (5) is provided with a temperature control device (51), and the heat insulation shell (2) is provided with two support tables (23) arranged at intervals and used for upwardly supporting the bottom of the heater (5), and the heater (5) placed on the support table (23) has a containing space (230) reserved between the main body of the heater (5) and the bottom wall of the heat insulation shell for accommodating the temperature control device (51).

5. The range hood cleaning heating device of claim 3, wherein: The bottom of the heat insulation shell (2) is further provided with a drain hole (24), and the two sides in the horizontal direction of the heat insulation shell (2) are each provided with a wiring avoiding hole (25) for the connecting end of the electric heater or the wire harness to pass through and a pipe passing avoiding hole (26) for the pipeline to pass through.

6. The range hood cleaning heating device of claim 3, wherein: The integrated shell (1) comprises front and rear side plates (111) and (112), the front and rear side plates (111) and (112) each have a first support rib plate (131) extending towards the inside of the integrated shell (1) and used for supporting the bottom of the heat insulation shell (2), and the front and rear side plates (111) and (112) each have a first limiting rib plate (141) and a second limiting rib plate (142) used for limiting the left and right sides of the integrated shell (1).

7. The range hood cleaning heating device of claim 6, wherein: The front and rear sides of the heat insulation shell (2) abut against the front and rear side plates (111) and (112) respectively.

8. The range hood cleaning heating device of claim 2, wherein: The integrated shell (1) is further provided with a heat insulation plate (3) inside, and the heat insulation plate (3) is transversely arranged between the heater (5) and the water pump (4).

9. The range hood cleaning heating device of claim 8, wherein: The inner wall of the integrated shell (1) is further provided with a first limiting slot (15) for inserting the peripheral edge of the heat insulation plate (3).

10. The range hood cleaning heating device of claim 8, wherein: The heater (5) is fixed to the top wall of the integrated shell (1) by a fastener, and the inner wall of the integrated shell (1) is further provided with a second support rib plate (132) for upwardly supporting the heater (5).

11. The range hood cleaning heating device of claim 8, wherein: The bottom of the heater (5) is provided with a temperature control device (51), and the heater (5) and the heat insulation plate (3) are arranged in an up-down direction.

12. The range hood cleaning heating device of claim 8, wherein: The integrated shell (1) is open at the rear side to allow the heat insulation plate (3), the water pump (4) and the heater (5) to be loaded into the integrated shell (1) from the rear side.

13. The range hood cleaning heating device according to any one of claims 1-12, wherein: The integrated shell (1) is provided with a water outlet pipe (91) connected to the water outlet end of the heater (5), and the bottom sidewall of the integrated shell (1) is provided with a first avoiding hole (16) through which the wire harness of the water pump (4) and the water outlet pipe (91) are led out.

14. The range hood cleaning heating device according to any one of claims 1-12, wherein: The integrated shell (1) is further provided with a water pump fixing seat (41) for fixing the water pump (4), and the bottom of the water pump fixing seat (41) is provided with a limiting protrusion (411) extending outward, and the integrated shell (1) is further provided with a mounting groove (170) for inserting the limiting protrusion (411) therein.

15. The range hood cleaning heating device of claim 14, wherein: The inner side of the integrated shell (1) is provided with a connecting leg (17), and the connecting leg (17) and the bottom wall of the integrated shell (1) form the mounting groove (170), and the bottom wall of the integrated shell (1) is provided with a mounting avoiding hole (115) corresponding to the mounting groove (170), and after the limiting protrusion (411) of the water pump fixing seat is mounted in place in the mounting groove (170), the limiting protrusion (411) is fixed on the connecting leg (17) by screwing through the mounting avoiding hole (115).

16. The range hood cleaning heating device according to any one of claims 1-12, wherein: The integrated shell (1) is further provided with a water pump fixing seat (41) for fixing the water pump (4), and the water pump fixing seat (41) is a vibration isolation member made of vibration isolation material, and the water pump fixing seat (41) is provided with a fixing hole (410), and the water pump (4) is fixed in the fixing hole (410) by a tight fitting mode.

17. A range hood comprising a housing and a heating device, characterized in that: The heating device adopts the heating device for range hood cleaning according to any one of claims 1-16, and the heating device is arranged on the inner sidewall or the outer sidewall of the shell.

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