A heating assembly and an automatic cleaning device for a range hood

Abstract

The application relates to a heating assembly and an automatic cleaning device of an extractor hood, and relates to the technical field of kitchen appliances. The heating assembly comprises an upper shell support, a lower shell, a heat exchange pipe, a heating sheet, a temperature controller, a water pipe and a water pump. The heat exchange pipe and the heating sheet are attached and used for heating fluid flowing through the heat exchange pipe. The upper shell support and the lower shell are connected to form a hollow heat exchange cavity used for clamping the heat exchange pipe and the heating sheet. The temperature controller is arranged on the upper shell support and electrically connected to the heating sheet, and is used for controlling the temperature of the heating sheet. The water pump is connected to the upper shell support and used for fixing the water pump. The liquid outlet of the water pump is connected to one end of the water pipe, and the other end of the water pipe is connected to the liquid inlet end of the heat exchange pipe, and is used for sending cleaning liquid into the heat exchange pipe. The automatic cleaning of the extractor hood can be realized by adopting the application.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a heating element and an automatic cleaning device for a range hood. Background Technology

[0002] As people's demand for kitchen cleanliness and ease of use increases, the cleaning of range hoods is receiving more and more attention. Chinese families generate a lot of oil fumes during cooking, and grease easily accumulates on the surface of the impeller and volute. If not cleaned in time, it will not only affect the air volume and air pressure, but may also cause safety accidents due to heat buildup from the grease.

[0003] Current automatic cleaning range hoods use methods such as hot water rinsing, steam softening, or heating wire. However, hot water or steam systems have large components, limited installation space, complex structure, and high energy consumption. Heating wire systems can only heat the outer area of ​​the volute and cannot clean the impeller, resulting in a small cleaning range.

[0004] Therefore, there is an urgent need to design an automatic cleaning device for range hoods that is small in size, has a large cleaning range, is energy efficient, and is safe and reliable. Utility Model Content

[0005] Therefore, it is necessary to provide a heating component and an automatic cleaning device for a range hood to address the aforementioned technical problems.

[0006] In a first aspect, a heating assembly is provided, including an upper housing support, a lower housing, a heat exchange tube, a heating element, a thermostat, a water pipe, and a water pump; wherein,

[0007] The heat exchange tube and the heating element are attached together to heat the fluid flowing through the heat exchange tube;

[0008] The upper shell support is connected to the lower shell to form a hollow heat exchange cavity, which is used to clamp the heat exchange tube and the heating element;

[0009] The temperature controller is mounted on the upper housing support and electrically connected to the heating element, and is used to control the temperature of the heating element;

[0010] The water pump is connected to the upper housing bracket for fixing the water pump;

[0011] The outlet of the water pump is connected to one end of the water pipe, and the other end of the water pipe is connected to the inlet of the heat exchange tube, which is used to send the cleaning liquid into the heat exchange tube, and the heated cleaning liquid flows out from the outlet of the heat exchange tube.

[0012] As an optional implementation, the upper housing support includes a side plate and a bottom plate; wherein,

[0013] The base plate is connected to the lower shell to form a hollow heat exchange cavity, which is used to clamp the heat exchange tube and the heating element;

[0014] The side plate is vertically connected to the two opposite edges of the base plate and extends upward;

[0015] The temperature controller is connected to the side panel;

[0016] The water pump is connected to the side plate.

[0017] As an optional implementation, the base plate includes a heat exchange tube groove that protrudes upward in the middle, and a corresponding groove that is recessed downward in the middle of the lower shell. The two sides of the base plate are fitted to the two sides of the lower shell. The heat exchange tube groove communicates with the groove to form the heat exchange cavity. Some or all of the heating elements are placed in the groove and are fitted to the heat exchange tube and the lower shell respectively. Some or all of the heat exchange tubes are placed in the heat exchange tube groove and are fitted to the heating elements and the base plate respectively.

[0018] As an optional implementation, the lower middle section of the heat exchange tube is flattened by a mold and placed horizontally between the heat exchange chambers. The flattened section is attached to the surface of the heating element to heat the fluid flowing through the heat exchange tube.

[0019] As an optional implementation, the contact surface between the heat exchange tube and the heating element is provided with a thermally conductive material to improve the thermal conductivity and fill the gaps in the contact surface.

[0020] As an optional implementation, it also includes an insulating pad, wherein the two edges of the lower housing are bent downward and outward to form a folded edge, and a slot is provided on the folded edge, the insulating pad is engaged in the slot and the bottom of the insulating pad protrudes from the bottom of the folded edge.

[0021] As an optional implementation, the heating element is a PTC ceramic plate.

[0022] In a second aspect, an automatic cleaning device for a range hood is provided, comprising a cleaning water cup, a water suction pipe, a cleaning nozzle, and a heating component as described in any one of the first aspects; wherein...

[0023] One end of the water suction pipe is inserted into the cleaning water cup, and the other end is connected to the liquid inlet of the water pump;

[0024] The cleaning nozzle is connected to the liquid outlet end of the heat exchange tube.

[0025] As an optional implementation, the cleaning nozzle is disposed on the volute enclosure of the range hood, and heated cleaning liquid is sprayed into the impeller area of ​​the range hood through a pre-set through hole on the volute enclosure.

[0026] As an optional implementation, the automatic cleaning device for the range hood is disposed in the housing of the range hood and is detachably connected to the range hood.

[0027] This application provides a heating assembly and an automatic cleaning device for a range hood, comprising: an upper housing support, a lower housing, a heat exchange tube, a heating element, a thermostat, a water pipe, and a water pump; wherein, the heat exchange tube and the heating element are fitted together to heat the fluid flowing through the heat exchange tube; the upper housing support is connected to the lower housing to form a hollow heat exchange cavity for clamping the heat exchange tube and the heating element; the thermostat is disposed on the upper housing support and electrically connected to the heating element for controlling the temperature of the heating element; the water pump is connected to the upper housing support for fixing the water pump; the outlet of the water pump is connected to one end of the water pipe, and the other end of the water pipe is connected to the inlet of the heat exchange tube for delivering cleaning liquid into the heat exchange tube, and the heated cleaning liquid flows out from the outlet of the heat exchange tube. The technical solution provided by the embodiments of this application brings at least the following beneficial effects: In existing automatic cleaning solutions for range hoods, common heating modules are bulky, have limited installation space, low heat exchange efficiency, and poor contact between the heating device and heat exchange components, resulting in slow heating of the cleaning liquid, high energy consumption, and difficulty in forming a stable heat exchange loop, thus reducing the cleaning effect. This application solves the problem of low efficiency in traditional point-contact heat exchange by using a compact and highly efficient heating component. The heat exchange tube flattening section is closely fitted to the heating element over a large area. The clamping structure of the upper and lower shells provides sufficient clamping force without occupying a large installation space, improving the compactness and safety of the heat exchange component. A thermostat is installed to dynamically regulate the heating element, ensuring a stable, safe, and energy-efficient heating process. By constructing a closed-loop heat exchange loop system, the response speed and operating efficiency of the entire cleaning system are improved. The heating component of this application has a compact overall structure, suitable for integration within the limited space of a range hood housing. The modular design facilitates assembly, disassembly, and maintenance, making it suitable for industrial mass production.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1a This is a schematic diagram of the structure of a heating assembly provided in an embodiment of this application;

[0031] Figure 1b This is a schematic diagram of the exploded structure of a heating assembly provided in an embodiment of this application;

[0032] Figure 2a This is a schematic diagram of the structure of an upper shell support provided in an embodiment of this application;

[0033] Figure 2b This is a schematic diagram of another upper housing support provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of the base plate of an upper shell support provided in an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the structure of a heat exchange tube provided in an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the structure of an insulating pad provided in an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the structure of an automatic cleaning device for a range hood provided in an embodiment of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] The following will describe in detail a heating component provided in the embodiments of this application, with reference to specific implementation methods. Figure 1a This is a schematic diagram of a heating assembly provided in an embodiment of this application. Figure 1b This is an exploded structural diagram of a heating assembly provided in an embodiment of this application, as shown below. Figure 1a and 1b As shown, it includes an upper housing support 110, a lower housing 120, a heat exchange tube 130, a heating element 140, a thermostat 150, a water pipe 160, and a water pump 170. The specific structure is as follows:

[0040] The heat exchange tube 130 and the heating element 140 are attached together to heat the fluid flowing through the heat exchange tube 130.

[0041] The upper shell support 110 and the lower shell 120 are connected to form a hollow heat exchange cavity, which is used to clamp the heat exchange tube 130 and the heating element 140.

[0042] The thermostat 150 is mounted on the upper housing bracket 110 and electrically connected to the heating element 140 to control the temperature of the heating element 140.

[0043] The water pump 170 is connected to the upper housing bracket 110 for fixing the water pump 170.

[0044] The outlet 1701 of the water pump 170 is connected to one end 1601 of the water pipe 160, and the other end 1602 of the water pipe 160 is connected to the inlet 1301 of the heat exchange tube 130, which is used to send the cleaning liquid into the heat exchange tube 130. The heated cleaning liquid flows out from the outlet 1302 of the heat exchange tube 130.

[0045] In implementation, the upper housing support 110 and lower housing 120 of the heating assembly are connected to form a closed heat exchange chamber. Inside the heat exchange chamber, the heating element 140 is attached to the inner bottom surface of the lower housing 120, and the heat exchange tube 130 is in close contact with the upper surface of the heating element 140. When the heating assembly is working, driven by the water pump 170, the cleaning liquid flows from the outlet 1701 of the water pump into the first end 1601 of the water pipe 160 and is transported to the inlet end 1301 of the heat exchange tube 130. During the flow of the cleaning liquid in the heat exchange tube 130, due to the continuous heating of the heating element 140, its heat is conducted to the cleaning liquid through the heat exchange tube 130, causing it to heat up rapidly and form heated liquid or hot steam. The thermostat 150 is mounted on the upper housing support 110 and is electrically connected to the heating element 140. The thermostat 150 can monitor the internal temperature of the heat exchange chamber in real time. When the temperature reaches the preset value, the thermostat 150 can disconnect the power supply to the heating element 140 to prevent overheating. When the temperature drops to the set lower limit, the circuit can be closed again to achieve dynamic temperature control. In practical applications, this heating component can be installed on the top of the range hood housing. It has the advantages of compact size, high heat exchange efficiency, strong safety, and high integration, making it suitable for embedded or modular range hood cleaning systems.

[0046] As an optional implementation method, Figure 2a This is a schematic diagram of the structure of an upper shell support provided in an embodiment of this application, as shown below. Figure 2a As shown, it includes a side plate 1101 and a bottom plate 1102. Among them,

[0047] The base plate 1102 is connected to the lower shell 120 to form a hollow heat exchange cavity, which is used to clamp the heat exchange tube 130 and the heating element 140.

[0048] The side plate 1101 is vertically connected to the base plate 1102.

[0049] Thermostat 150 is connected to side plate 1101.

[0050] The water pump 170 is connected to the side plate 1101, which is used to support the water pump 170.

[0051] In implementation, the upper shell support consists of a side plate 1101 and a bottom plate 1102. Preferably, it can be made of metal sheet (such as galvanized steel sheet or stainless steel sheet) and formed into an integral or assembled structure through stamping, bending or welding processes. The bottom plate 1102 serves as the main support surface of the heating component. After being combined with the lower shell 120, it forms a hollow heat exchange cavity between the two, which is used to accommodate and clamp the heating element 140 and the heat exchange tube 130. The heat exchange cavity provides a relatively closed thermal environment, which is conducive to the concentrated conduction of heat energy and reduces heat loss. The side plate 1101 is vertically fixed to at least one side of the bottom plate 1102 and can form a structural profile with a "U"-shaped (or U-shaped) cross-section. This side plate serves as a structural reinforcement to improve the overall rigidity of the shell, and also as a functional mounting component to facilitate the integration of the thermostat 150 and the water pump 170. Specifically, the thermostat 150 can be fixed to the inner side of the side plate 1101 by means of clips or screws for real-time monitoring of the internal temperature of the heat exchange cavity. When the detected temperature reaches the preset threshold, the thermostat can automatically disconnect the power circuit of the heating element 140 to achieve heating protection control. The water pump 170 can also be fixedly installed on the side plate 1101 by screws or bracket connection, located on the outside of the upper housing. Figure 2b This is a schematic diagram of another upper housing support provided in an embodiment of this application, as shown below. Figure 2b The side plate 1101 shown can be provided with an outwardly folded side plate connector 1103, which can support the water pump 170 on the one hand and be fixed to the water pump 170 on the other hand, so that the water pump 170 is installed firmly. The water pump 1701 can also be provided on the water pump 170. The water pump connector 1701 is aligned with the side plate connector 1103 and can be connected by screws or clips, which facilitates pipeline layout and component maintenance.

[0052] As an optional implementation method, Figure 3 This is a schematic diagram of the structure of the base plate of an upper shell support provided in an embodiment of this application, as shown below. Figure 3 As shown, the base plate 1102 includes a heat exchange tube groove 11021 that protrudes upward in the middle, and a corresponding groove 1201 that is recessed downward in the middle of the lower shell 120. The two sides of the base plate 1102 are fitted to the two sides of the lower shell 120. The heat exchange tube groove 11021 and the groove 1201 communicate to form the heat exchange cavity. Some or all of the heating elements 140 are placed in the groove 1201 and are fitted to the heat exchange tube 130 and the lower shell 120 respectively. Some or all of the heat exchange tubes 130 are placed in the heat exchange tube groove 11021 and are fitted to the heating elements 140 and the base plate 1102 respectively.

[0053] In implementation, the base plate 1102 can be a stamped metal sheet structure, with an overall flat shape. An upwardly protruding heat exchanger tube groove 11021 can be provided on the base plate 1102. The heat exchanger tube groove 11021 can extend along the length of the base plate 1102, and its cross-section can be in the form of an arc, ellipse, or V-shape, etc., to match the cross-sectional shape of the heat exchanger tube 130. Because the localized protrusion of the heat exchanger tube groove 11021 can provide a downward pre-compression stress, it can make the heat exchanger tube 130 fit more tightly with the heating element 140, effectively reducing micro-gaps and improving heat transfer efficiency. By setting the heat exchanger tube groove 11021, automatic positioning and compression of the heat exchanger tube 130 can be achieved during assembly without the need for an additional elastic clamping mechanism, which helps improve assembly efficiency and stability, while also enhancing the overall thermal uniformity and safety of the system.

[0054] As an optional implementation method, Figure 4 This is a schematic diagram of the structure of a heat exchange tube provided in an embodiment of this application, as shown below. Figure 4 As shown, the lower middle section of the heat exchange tube 130 is flattened by a mold and placed horizontally between the heat exchange chambers. The flattened section is attached to the surface of the heating element 140 to heat the fluid flowing through the heat exchange tube 130.

[0055] In practice, the heat exchange tube 130 can be made of aluminum or stainless steel round tubes, such as... Figure 4 As shown, the two ends of the heat exchange tube 130 can be circular to facilitate connection with inlet and outlet pipes, while the lower middle section is flattened by a mold to form a heat exchange surface area 1301 with a cross-section that is round at the top and flat at the bottom. The flattened section is located in the central region along the length of the heat exchange cavity, horizontally positioned between the base plate 1102 of the upper shell support 110 and the lower shell 120. Structurally, as... Figure 3 As shown, the lower surface of the flattened section of the heat exchange tube 130 is in contact with the upper surface of the heating element 140, and the upper surface is pressed by the base plate 1102 of the upper housing support 110. The flattened section, constrained by the upper and lower structures, has good resistance to deformation and can withstand long-term fluid impact and thermal cycling, making it suitable for the long-term operating environment of range hoods.

[0056] As an optional implementation, the contact surface between the heat exchange tube 130 and the heating element 140 is provided with a thermally conductive material to improve the thermal conductivity and fill the gaps in the contact surface.

[0057] In practice, the interface between the flattened section of the heat exchange tube 130 and the heating element 140 often has minor unevenness or microscopic gaps. If they are directly bonded, an air layer will be introduced into the heat conduction path, greatly affecting the heat exchange efficiency. Therefore, to optimize thermal contact performance, a thermally conductive material is placed between the two contact surfaces. This effectively fills the microscopic gaps, reduces interfacial thermal resistance, and enhances heat flux conduction efficiency. The thermally conductive material can be selected from materials such as thermally conductive silicone grease, thermally conductive gel, thermally conductive pads, or phase change thermally conductive films, which have good thermal conductivity and can adapt to the morphological differences caused by the different surface roughness of the heat exchange tube 130 and the heating element 140.

[0058] As an optional implementation method, Figure 5 This is a schematic diagram of the structure of an insulating pad provided in an embodiment of this application, as shown below. Figure 5 As shown, the heating assembly also includes an insulating pad 190. The two edges of the lower housing 120 are bent downward and outward to form a folded edge 1202. A slot 12021 is provided on the folded edge. The insulating pad 190 is engaged in the slot 12021 and the bottom of the insulating pad 190 protrudes from the bottom of the folded edge 1202.

[0059] In implementation, the insulating pad 190 can be placed on the bottom outer side of the lower housing 120, located between the heating component and the range hood mounting surface. Since the heating component involves the energization and heating of the heating element 140 during operation, there is a risk of leakage or heat transfer to surrounding structures from the bottom metal housing. Therefore, by laying the insulating pad 190 on the lower part of the lower housing, electrical insulation, thermal isolation, and vibration damping can be achieved. The insulating pad 190 can be a single integral pad, slightly larger than the bottom surface of the lower housing 120, or it can be multiple pads distributed at various locations on the bottom surface of the lower housing 120, and can be fixed by clips, adhesives, or pre-press installation.

[0060] As an alternative implementation, the heating element 140 can be a PTC ceramic plate.

[0061] This application also provides an automatic cleaning device for range hoods. Figure 6 This is a schematic diagram of the structure of an automatic cleaning device for a range hood provided in an embodiment of this application, as shown below. Figure 6 As shown, it includes a cleaning water cup 210, a water suction pipe 220, a cleaning nozzle 230, and a heating element 240. Among them,

[0062] One end of the suction pipe 220 (shown as a dashed line in the figure, with arrows indicating the direction of liquid flow) is inserted into the cleaning water cup 210, and the other end is connected to the inlet 1702 of the water pump 170.

[0063] The cleaning nozzle 230 is connected to the liquid outlet 1302 of the heat exchange tube 130.

[0064] In implementation, the cleaning water cup 210 can be a sealed liquid container with a lid, located inside or in an easily accessible external position within the range hood, for storing a measured amount of cleaning liquid (water or a cleaning agent aqueous solution). One end of the suction pipe 220 is inserted into the cleaning water cup 210, and the other end is connected to the liquid inlet 1301 of the heating element. When the system starts the cleaning program, the cleaning liquid is drawn into the liquid inlet 1702 of the water pump 170 of the heating element through the suction pipe 220. The heated liquid is then introduced into the cleaning nozzle 230 through the liquid outlet 1302 of the heat exchange pipe 130 and sprayed out at a certain pressure at the nozzle.

[0065] As an optional implementation, the cleaning nozzle 230 can be disposed on the volute enclosure 310 of the range hood, and heated cleaning liquid can be sprayed into the impeller area 320 of the range hood through a pre-set through hole on the volute enclosure 310.

[0066] In practice, the cleaning nozzle 230 can be installed on the volute enclosure 310 of the range hood, with the spray direction directed towards the impeller or the inner surface of the volute. The high-temperature cleaning liquid can soften and flush away the adsorbed grease in a short time. Multiple sets of nozzles can also be set to achieve wide coverage and improve cleaning uniformity.

[0067] As an alternative implementation, the automatic cleaning device for the range hood can be installed in the housing of the range hood and detachably connected to the range hood.

[0068] In implementation, the automatic cleaning device for the range hood can be integrated as a modular unit inside the range hood housing. The preferred installation location is the top of the range hood or above the volute, depending on the overall structural space. To facilitate future maintenance, component replacement, and cleaning, the automatic cleaning device is detachably connected to the range hood, using methods such as screws, clips, slide rails, or plug-in connectors for mechanical fixation and quick assembly / disassembly.

[0069] This application provides a heating assembly and an automatic cleaning device for a range hood, including an upper housing support 110, a lower housing 120, a heat exchange tube 130, a heating element 140, a thermostat 150, a water pipe 160, and a water pump 170. The specific structure is as follows: The heat exchange tube 130 and the heating element 140 are fitted together to heat the fluid flowing through the heat exchange tube 130. The upper housing support 110 and the lower housing 120 are connected to form a hollow heat exchange cavity for clamping the heat exchange tube 130 and the heating element 140. The thermostat 150 is mounted on the upper housing support 110 and electrically connected to the heating element 140 to control the temperature of the heating element 140. The water pump 170 is connected to the upper housing support 110 for fixing the water pump 170. The outlet 1701 of the water pump 170 is connected to one end 1601 of the water pipe 160, and the other end 1602 of the water pipe 160 is connected to the inlet 1301 of the heat exchange tube 130, for sending the cleaning liquid into the heat exchange tube 130. The heated cleaning liquid flows out from the outlet 1302 of the heat exchange tube 130. The technical solution provided by the embodiments of this application brings at least the following beneficial effects: In the existing automatic cleaning solutions for range hoods, the common heating module structure is large in size, has limited installation position, low heat exchange efficiency, and the contact between the heating device and the heat exchange component is not tight, resulting in slow heating speed of the cleaning liquid, high energy consumption, and difficulty in forming a stable heat exchange circuit, which reduces the cleaning effect. This application solves the problem of low efficiency of traditional point contact heat exchange by using the flattened section of the heat exchange tube 130 to fit the heating element 140 over a large area. By using the clamping structure of the upper and lower shells, sufficient clamping force is provided without occupying a large installation space, improving the compactness and safety of the heat exchange component. A thermostat 150 is used to dynamically regulate the heating element 140, ensuring a stable, safe, and energy-efficient heating process. By constructing a closed-loop heat exchange system, the response speed and operating efficiency of the entire cleaning system are improved. The heating component provided in this embodiment has a compact overall structure, suitable for integration within the limited space of a range hood housing. Its modular design facilitates assembly, disassembly, and maintenance, making it suitable for industrial mass production.

[0070] It is understood that the same / similar parts between the various embodiments of the methods described above in this specification can be referred to each other. Each embodiment focuses on the differences from other embodiments, and relevant parts can be referred to the description of other method embodiments.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data used for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0073] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heating assembly, characterized in that, It includes an upper housing support (110), a lower housing (120), a heat exchange tube (130), a heating element (140), a thermostat (150), a water pipe (160), and a water pump (170); among which, The heat exchange tube (130) and the heating element (140) are attached together to heat the fluid flowing through the heat exchange tube (130); The upper shell support (110) is connected to the lower shell (120) to form a hollow heat exchange cavity, which is used to clamp the heat exchange tube (130) and the heating element (140); The temperature controller (150) is disposed on the upper housing bracket (110) and electrically connected to the heating element (140) for controlling the temperature of the heating element (140); The water pump (170) is connected to the upper housing bracket (110) for fixing the water pump (170); The outlet (1701) of the water pump (170) is connected to one end (1601) of the water pipe (160), and the other end (1602) of the water pipe (160) is connected to the inlet (1301) of the heat exchange tube (130) to send the cleaning liquid into the heat exchange tube (130), and the heated cleaning liquid flows out from the outlet (1302) of the heat exchange tube (130).

2. The heating assembly according to claim 1, characterized in that, The upper housing support (110) includes a side plate (1101) and a bottom plate (1102); wherein, The base plate (1102) is connected to the lower shell (120) to form a hollow heat exchange cavity, which is used to clamp the heat exchange tube (130) and the heating element (140); The side plate (1101) is vertically connected to the two opposite edges of the base plate (1102) and extends upward; The temperature controller (150) is connected to the side plate (1101); The water pump (170) is connected to the side plate (1101).

3. The heating assembly according to claim 2, characterized in that, The base plate (1102) includes a heat exchange tube groove (11021) that protrudes upward in the middle. The lower shell (120) is provided with a corresponding downward recessed groove (1201) in the middle. The two sides of the base plate (1102) are fitted to the two sides of the lower shell (120). The heat exchange tube groove (11021) and the groove (1201) are connected to form the heat exchange cavity. Some or all of the heating elements (140) are placed in the groove (1201) and are fitted to the heat exchange tube (130) and the lower shell (120) respectively. Some or all of the heat exchange tubes (130) are placed in the heat exchange tube (130) groove and are fitted to the heating elements (140) and the base plate (1102) respectively.

4. The heating assembly according to claim 1 or 3, characterized in that, The lower middle section of the heat exchange tube (130) is flattened by a mold and placed horizontally between the heat exchange cavities. The flattened section is attached to the surface of the heating element (140) to heat the fluid flowing through the heat exchange tube (130).

5. The heating assembly according to claim 1 or 3, characterized in that, The contact surface between the heat exchange tube (130) and the heating element (140) is provided with a thermally conductive material to improve the thermal conductivity and fill the gaps in the contact surface.

6. The heating assembly according to claim 1, characterized in that, It also includes an insulating pad (190). The two edges of the lower housing (120) are bent downward and outward to form a folded edge (1202). A slot (12021) is provided on the folded edge (1202). The insulating pad (190) is engaged in the slot (12021) and the bottom of the insulating pad (190) protrudes from the bottom of the folded edge (1202).

7. The heating assembly according to claim 1, characterized in that, The heating element (140) is a PTC ceramic plate.

8. An automatic cleaning device for a range hood, characterized in that, It includes a water cup (210), a water suction pipe (220), a cleaning nozzle (230), and a heating assembly (240) as described in any one of claims 1-7; wherein, One end of the water suction pipe (220) is inserted into the cleaning water cup (210), and the other end is connected to the liquid inlet (1702) of the water pump (170); The cleaning nozzle (230) is connected to the liquid outlet (1302) of the heat exchange tube (130).

9. The apparatus according to claim 8, characterized in that, The cleaning nozzle (230) is installed on the volute enclosure (310) of the range hood, and sprays heated cleaning liquid into the impeller area (320) of the range hood through a pre-set through hole on the volute enclosure (310).

10. The apparatus according to claim 8, characterized in that, The automatic cleaning device for the range hood is installed in the housing of the range hood and is detachably connected to the range hood.

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