Heating device for cleaning range hood and range hood

Abstract

The utility model relates to a heating device for range hood cleaning and a range hood, 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, a heat insulation shell is also arranged in the integrated shell, and a first mounting cavity and a second mounting cavity which are independent from each other are defined in the heat insulation shell; the heater is arranged in the first installation cavity, the water pump is arranged in the second installation cavity, and heat dissipation holes penetrating through the inside and the outside are further formed in the wall of the second installation cavity. The utility model has the advantage of realizing a three-dimensional layered layout structure of the water pump and the heater. The heat insulation shell used for fixing the heater and the water pump are arranged at the same time, a fixing base or a fixing frame does not need to be additionally arranged, the plane occupied area is effectively reduced through vertical space distribution in the structural layout, the overall size is greatly reduced compared with a traditional layout mode, and the structure is more compact.

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 installations use an integrated layout, where the water pump and heating module are installed together. This layout often employs a parallel or stacked installation structure for the water pump and heater, failing to fully consider the three-dimensional spatial compatibility of their functional components (such as the water pump motor, impeller cavity, heating element, and temperature control unit). For example, while a straight-line connection between the water pump inlet and the heater outlet simplifies piping, it forces redundant assembly space in the horizontal or vertical directions, directly causing the overall size of the integrated module (especially in the width or height direction) to exceed the design threshold of the range hood installation space. In particular, the need for heat dissipation and shock absorption space for the water pump, as well as the insulation space between the heater and the water pump, creates a cumulative effect, further exacerbating the space waste. Range hood installation environments, whether internal or external (i.e., installed on the top outside of the fan frame), often do not allow for significant space leeway in any direction. Therefore, the overall versatility of existing integrated heating devices is relatively poor, and the structure is not compact enough.

[0005] Therefore, existing range hoods still 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 is compact in structure and simplifies assembly, 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, wherein the water pump and the heater are both disposed in the integrated housing, and a heat insulation shell is also provided in the integrated housing. The heat insulation shell defines an independent first installation chamber and a second installation chamber. The heater is disposed in the first installation chamber and the water pump is disposed in the second installation chamber.

[0009] The first and second installation chambers mentioned above, especially the second installation chamber, are not limited to a closed chamber structure. Corresponding ventilation openings can be provided on them, or they can be designed as hollow or semi-closed structures, as long as the positioning of the water pump and heater can be achieved.

[0010] As an improvement, the second mounting chamber is located below the first mounting chamber. The heater is located in the first mounting chamber, above it, and the water pump is located in the second mounting chamber, below it. This layout prevents water in the connecting pipe from flowing into the heater due to gravity during water supply. The water in the connecting pipe also separates 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 scale carried by hot air from affecting the pump's lifespan, reducing pump failures.

[0011] As an improvement, the second mounting chamber is also provided with heat dissipation holes that run through the inside and outside. In particular, the heat dissipation holes allow the heat generated by the water pump to be directly discharged through the heat dissipation holes, avoiding heat accumulation through circulation.

[0012] To simplify piping connections and reduce lateral space occupation, the heater is a laterally extending cavity heater, and the water pump also extends laterally. The water pump and the heater are connected by a connecting pipe, and the positions where the water pump and the connecting pipe are connected, and the positions where the heater and the connecting pipe are connected, are located on the same side in the lateral direction. This lateral extension layout and same-side connection design shortens the piping length, reduces flow resistance, and makes the overall structure more compact, avoiding the problem of excessive size in one direction.

[0013] As an improvement, a temperature control device is provided at the bottom of the heater. The first mounting chamber has two spaced-apart support platforms for upward support of the heater's bottom. A space is reserved between the heater body placed on the support platforms and the bottom wall of the first mounting chamber to accommodate the temperature control device. The support platforms form a suspended structure, providing heat insulation space for the temperature control device (e.g., the bottom is 5-10cm away from the heater body), preventing damage from external pressure.

[0014] As an improvement, the bottom of the first mounting chamber is also provided with a drain hole. Both sides of the first mounting chamber 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 drain hole quickly drains condensate, preventing short circuits and corrosion of electrical components caused by minor air or water leaks inside the heater, and also serves to guide airflow. The routing holes guide the wiring harness and pipes to pass through in a specific direction (e.g., power lines on the left, water pipes on the right), avoiding tangled mess.

[0015] To ensure stable installation of the thermal insulation shell within the integrated housing, a stepped portion is formed on the outer wall of the thermal insulation shell at the junction of the first and second mounting chambers. The integrated housing includes a front side plate and a rear side plate facing each other. Both the front and rear side plates have first supporting ribs extending inwards towards the integrated housing to support the stepped portion of the thermal insulation shell. The front and rear side plates also have first and second limiting ribs, respectively, for limiting the left and right sides of the thermal insulation shell. The stepped portion and the supporting ribs form a multi-positioning structure (e.g., a front-to-back ±0.5mm assembly tolerance) to prevent shell displacement. Furthermore, the two limiting ribs can restrain lateral swaying.

[0016] As an improvement, the front and rear sides of the first mounting chamber abut against the front and rear side plates of the integrated housing, respectively. The front and rear sides of the first mounting chamber directly abut against the side plates of the housing, forming a rigid support (e.g., the contact area reaches more than 90%), making the installation of the heat insulation housing more stable and reliable, and also avoiding vibration problems.

[0017] As an improvement, the thermal insulation housing includes two interlocking front and rear halves. The interlocking housing simplifies mold development, improves assembly efficiency, and ensures chamber airtightness.

[0018] 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.

[0019] 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.

[0020] Compared with existing technologies, the advantages of this utility model are as follows: This utility model achieves a three-dimensional, layered layout structure for the water pump and heater by dividing the integrated housing into independent first and second installation chambers with a heat-insulating shell. The heat-insulating shell used to fix the heater also serves to house the water pump, eliminating the need for additional mounting bases or brackets. This structural layout effectively reduces the planar area occupied through vertical spatial distribution, significantly reducing the overall volume compared to traditional layouts, resulting in a more compact structure, especially suitable for installation in limited spaces on the top or side of range hoods. The modular heat-insulating shell enables pre-assembly of the water pump and heater, requiring only overall fixing and pipe connection during on-site installation, effectively improving assembly efficiency. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the heating device according to another embodiment of the present utility model;

[0023] Figure 3 This is an exploded view of the heating device according to an embodiment of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present invention, excluding the cover.

[0025] Figure 5 This is a three-dimensional structural diagram of the shell body of the heating device according to an embodiment of the present utility model;

[0026] Figure 6 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present invention, excluding the integrated outer shell;

[0027] Figure 7 This is a three-dimensional structural diagram of the heating device of this utility model embodiment after omitting the integrated outer shell;

[0028] Figure 8 This is a three-dimensional structural diagram of the heating device according to an embodiment of the present utility model, after omitting the integrated outer shell and the heat insulation shell, showing the rear half of the shell.

[0029] Figure 9 This is a three-dimensional structural diagram of the heat insulation shell of the heating device according to an embodiment of the present utility model;

[0030] Figure 10 This is an exploded view of the heat insulation shell of the heating device according to an embodiment of the present invention. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] See Figures 4-10The heating device for cleaning a range hood in this embodiment includes an integrated housing 1, a heat-insulating housing 2, 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.

[0036] The heating element 52 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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 ribs 116 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. The positioning protrusion 117 on the shell body 11 and the positioning recess 1220 on the second cover plate 122 are both located near 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 which 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 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.

[0042] 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 slot gap of the shell body 11 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 slots, positioning protrusions 117 and other structures. The integrated shell 1 does not use welding, which reduces costs.

[0043] In this embodiment, the heat insulation shell 2 defines two independent mounting chambers: a first mounting chamber 201 and a second mounting chamber 202, with the second mounting chamber 202 located below the first mounting chamber 201. The heater 5 is located within the first mounting chamber 201, and the water pump 4 is located within the second mounting chamber 202. The front and rear side walls of the second mounting chamber 202 are also provided with through-holes 2020 for heat dissipation. Using the aforementioned heat insulation shell 2 prevents heat generated by the heater 5 from radiating to the water pump 4, thus avoiding any adverse effects on the normal operation of the water pump 4. The heat insulation shell 2 can be made of microporous fiber material through extrusion molding. Furthermore, by setting the heat insulation shell 2 within the integrated outer shell 1 to separate the first mounting chamber 201 and the second mounting chamber 202, a three-dimensional layered layout structure of the water pump 4 and the heater 5 is achieved. The heat-insulating housing 2, used to fix the heater 5, also houses the water pump 4, eliminating the need for additional mounting bases or brackets. This structural layout effectively reduces the floor area occupied by vertical spatial distribution, significantly reducing the overall volume compared to traditional layouts, resulting in a more compact structure, especially suitable for installation in limited spaces on the top or side of range hoods. The modular heat-insulating housing 2 enables pre-assembly of the water pump 4 and heater 5, requiring only overall fixing and pipe connection during on-site installation, effectively improving assembly efficiency. In particular, the heat dissipation holes 2020 on the front and rear side walls of the second installation chamber 202 allow the heat generated by the water pump 4 during operation to be directly discharged through the heat dissipation holes 2020, preventing heat accumulation through circulation.

[0044] The thermal insulation shell 2 comprises two interlocking half-shells. This interlocking half-shell design provides full thermal enclosure and allows for quick access to internal components through disassembly, reducing maintenance costs. The two half-shells are joined in the front-to-back direction and are designated as the front half-shell 21 and the rear half-shell 22, respectively.

[0045] 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 first mounting chamber 201 of the heat insulation housing 2 has wiring clearance holes 25 for the connection terminals of the heater or wiring harness, and pipe clearance holes 26 for the pipes (such as connecting pipe 71 and water outlet pipe 91) on both sides in the lateral direction. To prevent the temperature controller 51 from being damaged by compression, the first mounting chamber 201 of the heat insulation housing 2 has 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 first mounting chamber 201 to accommodate the temperature controller 51. In this embodiment, the heat insulation housing 2 avoids fixing the heater 5 with screws; it can be fixed using the internal limiting structure of the first mounting chamber 201 (such as the support platform 23, inner wall, etc.). The bottom of the first installation chamber 201 is also provided with a drain hole 24. The bottom drain hole 24 can drain condensate in time, which avoids short circuit and corrosion of electrical components caused by a small amount of air or water leakage inside the heater 5, and plays a role in guiding the air flow.

[0046] The second installation chamber 202 has a third clearance hole 27 on both the left and right side walls. One of the third clearance holes 27 allows the water inlet pipe 81 and the connecting pipe 71 to enter and exit, while the other third clearance hole 27 allows the wiring harness of the water pump 4 to pass through.

[0047] The front-to-back dimensions of the second mounting chamber 202 of the heat insulation shell 2 are smaller than those of the first mounting chamber 201. Therefore, two stepped portions 203 are formed on the outer wall of the heat insulation shell 2 at the junction of the first mounting chamber 201 and the second mounting chamber 202. 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 stepped portions 203 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 for limiting the left and right sides of the first mounting chamber 201, respectively. 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 supporting 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 (mainly the first mounting chamber 201) to be placed therein. After the heater 5 and the water pump 4 are installed in the two mounting chambers inside the heat insulation shell 2, they form a separate module unit, which can be installed into the shell body 11 from top to bottom through the top opening 113 of the shell 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 opened on the bottom wall of the shell body 11 for the water outlet pipe 91 to pass through from top to bottom. The first clearance hole 16 can be an oblong hole, and the wiring harness of the water pump 4 and the water outlet pipe 91 both pass through the first clearance hole 16. The wiring harness and outlet pipe 91 of the water pump 4 all pass through the first clearance hole 16 at the bottom to avoid weakening the structural strength of the outer casing due to 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.

[0048] The front and rear sides of the first mounting chamber 201 of the heat insulation housing 2 abut against the front side plate 111 and the rear side plate 112 of the integrated housing 1, respectively. In some embodiments, the front and rear side walls of the first mounting chamber 201 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.

[0049] The installation process of the heating device in this embodiment is as follows: The heater 5 and the water pump 4 are respectively installed into the first mounting chamber 201 and the second mounting chamber 202 of the heat insulation shell 2. The water outlet pipe 91 is installed on the heater 5 (of course, the water inlet pipe 81 and the connecting pipe 71 can also be installed at the same time or later). The heater 5 is then installed horizontally through the top opening 113 of the shell body 11. Since the size of the second mounting chamber 202 is relatively small, it can be moved down through the gap between the two first support ribs 131 until the step portion 203 of the first mounting chamber 201 rests on the two first support ribs 131. Finally, the top cover is inserted into place from top to bottom, and screws are driven into 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) is further provided with a heat insulation shell (2), the heat insulation shell (2) defines a first installation chamber (201) and a second installation chamber (202) which are independent from each other, the heater (5) is arranged in the first installation chamber (201), and the water pump (4) is arranged in the second installation chamber (202).

2. The range hood cleaning heating device of claim 1, wherein: The second installation chamber (202) is located below the first installation chamber (201), and a heat dissipation hole (2020) penetrating through the inside and outside of the second installation chamber (202) is further formed in the wall of the second installation chamber (202).

3. The range hood cleaning heating device of claim 2, wherein: The heater (5) is a horizontally extending cavity type heater (5), and the water pump (4) also extends horizontally as a whole, the water pump (4) and the heater (5) are communicated through a connecting pipe (71), 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.

4. The range hood cleaning heating device of claim 2, wherein: A temperature control device (51) is arranged at the bottom of the heater (5), two support tables (23) for upwardly supporting the bottom of the heater (5) are arranged in the first installation chamber (201) and are spaced apart from each other, and a containing space (230) for containing the temperature control device (51) is reserved between the main body of the heater (5) placed on the support tables (23) and the bottom wall of the first installation chamber (201).

5. The range hood cleaning heating device of claim 2, wherein: The bottom of the first installation chamber (201) is further provided with a drain hole (24), and two sides of the first installation chamber (201) in the horizontal direction are respectively provided with a wire avoiding hole (25) for the connecting end or wire harness of the electric heater to pass through and a pipe avoiding hole (26) for the pipeline to pass through.

6. The range hood cleaning heating device of claim 2, wherein: The outer wall of the heat insulation shell (2) is formed with a stepped portion (203) at the position where the first installation chamber (201) and the second installation chamber (202) are connected, the integrated shell (1) comprises front and rear side plates (111) and (112), the front and rear side plates (111) and (112) are respectively provided with a first support rib plate (131) extending towards the inside of the integrated shell (1) and used for supporting the stepped portion (203) of the heat insulation shell (2), and the front and rear side plates (111) and (112) are respectively provided with a first limiting rib plate (141) and a second limiting rib plate (142) used for limiting the left and right sides of the heat insulation shell (2).

7. The range hood cleaning heating device of claim 6, wherein: The front and rear sides of the first installation chamber (201) are respectively abutted against the front and rear side plates (111) and (112) of the integrated shell (1).

8. The range hood cleaning heating device of claim 2, wherein: The heat insulation shell (2) comprises a front half shell (21) and a rear half shell (22) which can be connected by buckling.

9. The range hood cleaning heating device according to any one of claims 1 to 8, characterized in that: An outlet pipe (91) connected with the water outlet end of the heater (5) is further included, a first avoiding hole (16) is formed in the bottom side wall of the integrated shell (1), and the wire harness of the water pump (4) and the outlet pipe (91) both pass out through the first avoiding hole (16).

10. A range hood comprising a housing and a heating device, characterized in that: The heating device is the heating device for cleaning the 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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