A range hood

Abstract

The utility model provides a kind of range hood, including shell and volute device, volute device includes volute, fan and self-cleaning component, self-cleaning component includes heat storage component, first pipeline, second pipeline and control module, heat conduction heat storage main body is formed with the heat storage cavity, first passageway and second passageway apart, heat storage cavity is filled with phase change material;First pipeline is connected into first circulation pipeline with first passageway, first pipeline is located at the air inlet of range hood;Second pipeline is connected into second circulation pipeline with second passageway, second pipeline is attached to the outer surface of volute coaming;Control module is according to the working condition of range hood control selects one circulation pipeline to open liquid circulation.The utility model range hood is heated volute using the heat of flue gas that range hood is sucked, energy consumption is low, power consumption is small, energy saving and environmental protection;And volute heating temperature will not be overheated, can avoid the adverse effects on volute internal device, especially fan motor.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, and in particular relates to a range hood. Background Technology

[0002] During normal use, the volute, as an important component of the range hood's duct system, will accumulate grease. This causes a large amount of grease to adhere to the inner wall of the volute and the impeller, blocking the impeller's inlet and outlet channels. This not only affects the exhaust and smoke extraction performance of the duct system but also increases noise, seriously impacting the user experience and the overall lifespan of the machine.

[0003] In related technologies, an electric heating wire is typically installed on the casing of the range hood. Electricity is applied to the heating wire to heat the metal casing, which in turn transfers heat to the inner wall of the casing and the impeller. This heat melts the grease condensed on the inner wall of the casing and the impeller into a liquid state. The molten grease on the inner wall of the casing flows out along the inner wall to the oil outlet, and then from the outlet into the oil cup. Simultaneously, the molten grease on the impeller is flung out to the air outlet during rotation, achieving a self-cleaning effect.

[0004] Using electric heating wire to heat the metal volute consumes a lot of electricity, which is not conducive to energy saving. Furthermore, the electric heating wire continues to heat during self-cleaning, and if the temperature control fails, there is a risk of overheating. Overheating can have an adverse effect on internal components of the volute, such as the motor.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] In response to the problems mentioned in the background art, this utility model proposes a range hood that can make full use of the waste heat of the flue gas for self-cleaning of the volute device, which is energy-saving and environmentally friendly.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In some embodiments of this application, a range hood is provided, including a housing and a volute device inside the housing. The housing has an air inlet. The volute device includes a volute and a fan. The volute includes a volute enclosure. The volute device further includes: The self-cleaning component includes: A heat storage component includes a heat-conducting and heat-storing body, wherein a heat storage cavity, a first channel and a second channel are formed inside the heat-conducting and heat-storing body, and the heat storage cavity is filled with a phase change material; The first pipe is connected to the first channel to form a first circulation pipe, and the first pipe is located at the air inlet of the smoke hood; The second pipeline is connected to the second channel to form a second circulation pipeline, and the second pipeline is attached to the outer surface of the volute enclosure plate. The first and second circulation pipes are respectively equipped with liquid pumps and valves for controlling the opening of liquid circulation in their respective pipes; The control module is used to select one of the circulation pipes to start liquid circulation based on the working status of the range hood.

[0008] The range hood in the above technical solution has the following advantages or beneficial effects: The self-cleaning component includes a heat storage component, a first circulation pipe, a second circulation pipe, and a control module. The first pipe of the first circulation pipe is located at the air inlet of the range hood, and the second pipe of the second circulation pipe is attached to the outer surface of the volute casing. The first and second circulation pipes are respectively equipped with pumps and valves for controlling the liquid circulation in their respective pipes. The control module selects one of the circulation pipes to activate liquid circulation based on the operating status of the range hood. Therefore, when the range hood is working, the first circulation pipe activates liquid circulation, and the liquid is absorbed through heat exchange. The heat from the high-temperature flue gas raises the temperature of the liquid in the first circulation pipe, and it exchanges heat with the heat storage component, causing the phase change material in the heat storage component to undergo a phase change and store heat, thus maintaining the liquid in the second circulation pipe at a high temperature. When the range hood stops working, the second circulation pipe starts circulating liquid, heating the volute. The volute absorbs heat, raising its temperature. During the circulation process, the liquid in the second circulation pipe exchanges heat with the phase change material in the heat storage component to maintain a high temperature, ensuring that the grease inside the volute and on the impeller has good fluidity and can flow smoothly to the oil outlet and out of the volute device, improving the self-cleaning effect of the range hood volute. Compared to the self-cleaning method of heating the volute with an electric heating wire in related technologies, the range hood in the above technical solution uses the heat from the flue gas absorbed by the range hood to heat the volute, which has low energy consumption, low power consumption, and is energy-saving and environmentally friendly; moreover, the heating temperature of the volute will not be overheated, which can avoid adverse effects on the internal components of the volute, especially the fan motor.

[0009] In some embodiments of this application, the first pipe is laid in a curved shape on the air inlet of the smoke machine, and the second pipe is bent and fixed to the outer surface of the volute enclosure.

[0010] In some embodiments of this application, a pipe fixing bracket is fixedly provided on the air inlet of the range hood, and the first pipe is fixedly provided on the pipe fixing bracket.

[0011] In some embodiments of this application, a plurality of spaced-apart heat-conducting fins are arranged inside the heat storage cavity, and the spaced-apart heat-conducting fins form flow channels for the phase change material in a molten state to flow through the heat storage cavity.

[0012] In some embodiments of this application, the heat storage component is fixed between the volute and the housing, and is located on the side opposite to the air inlet of the volute; The first channel and the second channel are located on opposite sides of the heat storage cavity and are vertically extending channels.

[0013] In some embodiments of this application, the first channel includes multiple first sub-channels arranged in parallel, with one end of the multiple first sub-channels converging into one, and the other end of the multiple first sub-channels converging into one; the second channel includes multiple second sub-channels arranged in parallel, with one end of the multiple second sub-channels converging into one, and the other end of the multiple first sub-channels converging into one.

[0014] In some embodiments of this application, the thermally conductive and heat-storing body includes a box body and a box cover disposed on the top surface of the box body, wherein the box body and the box cover are sealed together.

[0015] In some embodiments of this application, the heat storage component further includes a heat-insulating and flame-retardant outer layer, which covers the circumferential outer surface of the heat-conducting and heat-storing body.

[0016] In some embodiments of this application, the outer surface of the volute casing is further covered with heat-insulating and noise-reducing components, and the portion of the second pipeline that is in contact with the outer surface of the volute casing is sandwiched between the heat-insulating and noise-reducing components.

[0017] In some embodiments of this application, the liquid in the first circulation pipe and the second circulation pipe is an aqueous solution of ethylene glycol, deionized water, or fluorinated liquid.

[0018] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0019] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the range hood from the front view according to an embodiment; Figure 2 This is a three-dimensional structural diagram of a range hood from the rear view according to an embodiment; Figure 3 This is a three-dimensional structural diagram of a range hood with the rear panel of the casing omitted, according to an embodiment. Figure 4 This is a schematic diagram of the volute device according to an embodiment from one perspective; Figure 5 for Figure 4 Enlarged view of part A; Figure 6 This is a structural schematic diagram of the volute device according to an embodiment from another perspective; Figure 7 This is a schematic diagram of the volute device structure in which the outer surface of the volute casing is covered with heat-insulating and noise-reducing components according to an embodiment; Figure 8 This is a schematic diagram of the self-cleaning component structure of a range hood according to an embodiment; Figure 9 This is a schematic diagram of the thermally conductive and heat-storing main structure of the self-cleaning component according to an embodiment; Figure 10 An exploded structural diagram of the thermally conductive and heat-storing body of the self-cleaning assembly according to an embodiment; Figure 11 This is a schematic diagram of the box structure of the thermally conductive and heat-storing body according to an embodiment; Figure 12 for Figure 11 Top view; Figure 13 for Figure 12 BB cross-sectional view.

[0021] Figure label: 1. Volute assembly; 100. Volute; 110. Volute front plate; 120. Volute rear plate; 130. Volute enclosure; 140. Volute flange; 150. Volute air inlet; 160. Volute air outlet; 170. Air inlet ring; 200. Fan; 210. Motor; 220. Impeller; 300. Self-cleaning component; 310. Thermally conductive and heat-storing body; 311. Heat storage chamber; 312. First channel; 3 13. Second channel; 314. Interface; 315. Heat-conducting fins; 316. First sub-channel; 317. Box body; 318. Box cover; 319. Sealing ring; 320. First pipeline; 330. Second pipeline; 340. First liquid pump; 350. First valve; 360. Second liquid pump; 370. Second valve; 400. Pipeline fixing bracket; 410. Clip; 500. Thermal insulation and noise reduction components; 2. Housing; 21. Air inlet of the range hood; 22. Air guide plate; 23. Filter screen; 24. Exhaust duct. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0028] As described in the background section, during actual use, the volute, as an important component of the range hood's duct system, will accumulate grease. This causes a large amount of grease to adhere to the inner wall of the volute and the impeller, blocking the impeller's inlet and outlet channels. This not only affects the exhaust and smoke extraction performance of the duct system but also increases noise, seriously impacting the user experience and the overall lifespan of the machine.

[0029] In some embodiments of this application, a range hood is provided, which includes a housing and a volute device disposed inside the housing. The volute device includes a self-cleaning component that heats the volute to maintain good fluidity of the oil inside the volute, allowing it to flow along the inner wall of the volute to the oil outlet, and then from the oil outlet to the oil cup. The molten oil on the impeller of the volute fan can be thrown out to the air outlet while rotating, achieving the purpose of self-cleaning.

[0030] Figure 1 This is a three-dimensional structural diagram of the range hood from the front view according to an embodiment. Figure 2 This is a three-dimensional structural diagram of the range hood from the rear view according to an embodiment. Figure 3 This is a three-dimensional structural diagram of a rear-view range hood with the rear panel of the casing omitted, according to an embodiment. Figures 1 to 3 The range hood shown includes a housing 2 and a volute device 1 disposed inside the housing 2. The housing 2 has an air inlet 21, which is equipped with a guide vane 22 and a filter 23. The guide vane 22 effectively gathers the oil fumes during their ascent and diffusion, preventing them from spreading to other areas of the kitchen. When the oil fumes collide with the guide vane 22, their speed decreases, and they flow along the surface of the guide vane 22 towards the air inlet 21, then enter the volute device 1, and are finally discharged outdoors, thus achieving a better oil fume extraction effect. The filter 23 mainly filters the oil fumes, preventing grease, dust, and other impurities in the fumes from entering the range hood, reducing pollution and damage to the oil fumes.

[0031] Reference Figures 4 to 13 At the same time, combined Figures 1 to 3The volute device 1 includes a volute 100, which includes a volute front plate 110, a volute rear plate 120, a volute enclosure plate 130, and a volute flange 140. The volute front plate 110 is provided with a volute air inlet 150, the volute flange 140 is connected to the top plate of the housing 2, and the volute flange 140 is provided with a volute air outlet 160, which is connected to the exhaust duct 24 above the housing 2.

[0032] The volute assembly 1 also includes a fan 200, which is disposed inside the volute 100 and includes an impeller 220 and a motor 210. The output end of the motor 210 passes through a shaft sleeve and is connected to the impeller 220. The motor 210 is configured to drive the impeller 220 to rotate at high speed relative to the volute 100. The impeller 220 is coaxially arranged with the volute inlet 150, and an inlet ring 170 is provided on the outer end face of the volute inlet 150. Figure 4 and Figure 7 As shown, the air inlet ring 170 is engaged with the air inlet 150 of the volute, and the air inlet ring 170 is connected to the range hood air inlet 21 on the casing 2, which facilitates the collection of oil fumes.

[0033] When the fan 200 rotates, a negative pressure is formed inside the volute 100. The oil fumes enter the range hood housing 2 through the air inlet 21, and then enter the volute 100 through the air inlet 150. They are then discharged through the air outlet 160 of the volute 100 and finally discharged outdoors through the exhaust duct 24 of the housing 2.

[0034] like Figures 3 to 13 As shown, the volute device 1 also includes a self-cleaning component 300 for self-cleaning oil stains on the volute device 1, which melts the oil stains on the inner wall of the volute 100 and the impeller 220, maintains good fluidity, so that it can flow along the inner wall of the volute 100 to the oil outlet, and then flow from the oil outlet to the oil cup.

[0035] The self-cleaning component 300 includes a heat storage component, a first pipe 320, a second pipe 330, and a control module (not shown).

[0036] The heat storage component has a heat storage function and includes a heat-conducting heat storage body 310 made of a thermally conductive material such as copper or aluminum. The heat-conducting heat storage body 310 has three separately arranged heat storage chambers 311, a first channel 312, and a second channel 313. These are independent chambers or channels that are not interconnected. The heat storage chamber 311 is filled with a phase change material (such as paraffin wax). Because the heat-conducting heat storage body 310 is made of a thermally conductive material, heat exchange can occur between the substances in the heat storage chamber 311, the first channel 312, and the second channel 313 if there is a temperature difference.

[0037] The first pipe 320 is connected to the first channel 312 to form a first circulation pipe. The first pipe 320 is located at the air inlet 21 of the smoke hood. The first circulation pipe is a closed loop pipe and is filled with a flowable liquid.

[0038] The second pipe 330 is connected to the second channel 313 to form a second circulation pipe. The second pipe 330 is attached to the outer surface of the volute casing 130. The second circulation pipe is a closed loop pipe and is also filled with a flowable liquid.

[0039] The first circulation pipe and the second circulation pipe are respectively equipped with a pump and a valve for controlling the flow of liquid in their respective pipes. Specifically, the first circulation pipe is equipped with a pump and a valve for controlling the flow of liquid in its pipe, and the second circulation pipe is equipped with a pump and a valve for controlling the flow of liquid in its pipe. For ease of distinction, the pump and valve on the first circulation pipe are referred to as the first pump 340 and the first valve 350, respectively, and the pump and valve on the second circulation pipe are referred to as the second pump 360 and the second valve 370, respectively.

[0040] The control module is used to select one of the first and second circulation pipes to activate liquid circulation based on the operating status of the range hood. Specifically, when the control module controls the first liquid pump 340 and the first valve 350 to open and circulate liquid in the corresponding first circulation pipe, it controls the second liquid pump 360 and the second valve 370 to close, preventing liquid circulation in the second circulation pipe; conversely, when the control module controls the second liquid pump 360 and the second valve 370 to open and circulate liquid in the corresponding second circulation pipe, it controls the first liquid pump 340 and the first valve 350 to close, preventing liquid circulation in the first circulation pipe.

[0041] Specifically, when the range hood is working, the control module controls the first liquid pump 340 and the first valve 350 to open, so that the liquid in the first circulation pipe circulates. At the same time, it controls the second liquid pump and the second valve 370 to close, so that the liquid in the second circulation pipe stops flowing. During the circulation of the liquid in the first circulation pipe, it exchanges heat with the high-temperature flue gas flowing through the flue gas inlet. The liquid in the first circulation pipe absorbs heat, its temperature rises, and it becomes a high-temperature liquid. When the high-temperature liquid flows through the first channel 312 of the heat-conducting and heat-storing body 310, it exchanges heat with the phase change material in the heat storage chamber 311, which is currently in a low-temperature state, due to the heat conduction of the heat-conducting and heat-storing body 310. The phase change material absorbs heat, its temperature rises, and when its temperature rises to the phase change point, a phase change occurs, and it continues to absorb heat while maintaining a relatively constant temperature. Meanwhile, the high-temperature liquid in the first circulation pipe releases heat and its temperature decreases. It then circulates to the flue gas inlet, where it undergoes heat exchange again, absorbs heat, and the cycle repeats. At the same time, under the heat conduction of the heat-conducting and heat-storing body 310, the temperature of the liquid in the second circulation pipe also rises. During the heat storage process of the phase change material, the liquid's temperature is relatively consistent with that of the phase change material, and it is in a high-temperature state.

[0042] When the range hood finishes working and is turned off, the high-temperature flue gas stops being drawn into the air inlet 21 of the range hood. At this time, the control module controls the second liquid pump 360 and the second valve 370 to open, so that the liquid in the second circulation pipe circulates. At the same time, it controls the first liquid pump and the first valve 350 to close, so that the liquid in the first circulation pipe stops flowing. When the range hood has just finished working, the temperature of the volute 100 is high. However, the heat of the volute 100 will be quickly dissipated into the air, causing the temperature to drop and the fluidity of the grease to decrease. Meanwhile, the liquid in the second circulation pipe of the heat conduction and heat storage body 310 is still at a high temperature. After the second liquid pump and the second valve 370 are opened, the high temperature liquid in the second circulation pipe flows. When it flows to the outer surface of the volute enclosure 130, it releases heat. The volute 100 absorbs the heat, raising its temperature to a high temperature, which restores the fluidity of the grease. After releasing heat, the temperature of the liquid in the second circulation pipe decreases. When it circulates through the second channel 313 of the heat-conducting and heat-storing body 310, it exchanges heat with the internal phase change material. The phase change material releases heat and its temperature decreases. When its temperature decreases to the phase change point, a phase change occurs, and it continues to release heat while the temperature remains relatively constant. Meanwhile, the liquid in the second circulation pipe absorbs heat and its temperature rises, and the cycle repeats.

[0043] In some embodiments of this application, the range hood heats the volute 100 by utilizing the heat from the flue gas absorbed by the range hood after it stops working. Only the liquid pump requires a small amount of electricity to drive, resulting in low power consumption, energy saving, and environmental protection. Furthermore, the heating temperature of the volute 100 will not be overheated, which can avoid adverse effects on the internal components of the volute 100, especially the motor 210.

[0044] In some embodiments of this application, the liquid in the first circulation pipe and the second circulation pipe can be an aqueous solution of ethylene glycol, deionized water, or fluorinated liquid, etc.

[0045] In some embodiments of this application, such as Figure 3 , Figure 4 and Figure 6 As shown, the first pipe 320 is laid in a curved shape on the air inlet 21 of the flue to increase the contact area with the flue gas and increase the heat exchange efficiency; the second pipe 330 is laid in a curved shape on the outer surface of the volute enclosure 130 to increase the contact area with the volute enclosure 130 and increase the heat exchange efficiency.

[0046] In some embodiments of this application, such as Figures 3 to 6 As shown, a pipe fixing bracket 400 is fixed on the air inlet 21 of the smoke hood, and the first pipe 320 is fixed on the pipe fixing bracket 400.

[0047] Specifically, the periphery of the pipe fixing bracket 400 is fixed to the inner wall of the housing 2 around the air inlet 21 of the range hood by screws. It is a hollow bracket to ensure that the flue gas can enter normally. The first pipe 320 is fixed to the first liquid pipe fixing bracket 400 by the buckle 410, so that the first pipe 320 can remain stable during the operation of the range hood, reduce pipe shaking, and enhance structural strength and reliability.

[0048] Similarly, the second pipeline 330 can also be fixed to the outer surface of the volute casing 130 by clips to maintain stability.

[0049] Of course, other fixing methods can also be used for the first pipe 320 and the second pipe 330, and no restrictions are imposed here.

[0050] In some embodiments of this application, such as Figure 7 As shown, the outer surface of the volute enclosure 130 is also covered with heat insulation and noise reduction components 500, such as heat insulation and noise reduction cotton. The part of the second pipe 330 that is in contact with the outer surface of the volute enclosure 130 is sandwiched between the heat insulation and noise reduction components 500.

[0051] The heat insulation and noise reduction component 500 reduces heat loss from the outside of the volute 100 into the air, allowing more heat to be absorbed by the volute 100, raising the temperature of the grease inside the volute 100, enhancing its fluidity, and enabling it to flow out through the oil leakage holes of the volute 100. The heat insulation and noise reduction cotton, attached to the outside of the volute 100, absorbs noise from the volute 100, reducing the overall noise of the range hood. Simultaneously, the heat insulation and noise reduction component 500 also ensures a tight fit between the second pipe 330 and the volute casing plate 130, improving heat exchange efficiency. Specifically, the heat insulation and noise reduction component 500 can be fixed to the outer surface of the volute casing plate 130 by adhesive bonding.

[0052] For the connection between the heat storage component and the first pipeline 320, the second pipeline 330, the first liquid pump 340, the first valve 350, the second liquid pump 360, and the second valve 370, such as Figures 8 to 10As shown, the heat storage component has a box-shaped structure. Its heat-conducting and heat-storing main body 310 has four interfaces 314. Two interfaces 314 are connected to the two ends of the first pipe, and the two ends of the first pipe 320 are connected to these two interfaces 314 respectively. The other two interfaces 314 of the heat-conducting and heat-storing component are connected to the two ends of the second pipe, and the two ends of the second pipe 330 are connected to these two interfaces 314 respectively.

[0053] The first liquid pump 340 and the first valve 350 can be installed on the first pipeline 320, or on the two interfaces 314 of the heat-conducting and heat-storing body 310 that connect to the first pipeline 320, and then connected to the end of the first pipeline 320; similarly, the second liquid pump 360 and the second valve 370 can be installed on the second pipeline 330, or on the two interfaces 314 of the heat-conducting and heat-storing body 310 that connect to the second pipeline 330, and then connected to the end of the second pipeline 330.

[0054] In some embodiments of this application, such as Figures 10 to 12 As shown, the heat storage cavity 311 of the heat-conducting and heat-storing body 310 is provided with a number of spaced heat-conducting fins 315. These spaced heat-conducting fins 315 form a flow channel in the heat storage cavity 311 for the phase change material in the molten state to flow through.

[0055] By setting the heat-conducting fins 315, the heat-conducting area can be increased and the heat exchange efficiency can be improved.

[0056] Since the temperature of each fin may vary, the phase change material may have melted in some places and not in others. The baffle channel also helps to allow the melted phase change material to flow freely, thereby improving temperature uniformity.

[0057] like Figures 10 to 12 As shown, several heat-conducting fins 315 are arranged at intervals along the thickness direction of the heat-conducting and heat-storing body 310. Each heat-conducting fin 315 is connected to the inner wall of the heat storage cavity 311 on the same side only on one side, and the other side is a certain distance away from the inner wall of the opposite side of the heat storage cavity 311. Adjacent heat-conducting fins 315 are connected to the heat storage cavity 311 in an alternating manner, thereby forming a curved and meandering flow channel for the phase change material in the molten state to flow.

[0058] Taking two adjacent heat-conducting fins 315 as an example, one side of one heat-conducting fin 315 is fixedly connected to the inner wall a of the heat storage cavity 311, and the opposite side of this heat-conducting fin 315 is not connected to the inner wall b of the heat storage cavity 311 (inner wall b is opposite to inner wall a) and is separated by a certain distance to avoid the flow of phase change material; one side of the other heat-conducting fin 315 is fixedly connected to the inner wall b of the heat storage cavity 311, and the opposite side of this heat-conducting fin 315 is not connected to the inner wall a of the heat storage cavity 311 and is separated by a certain distance to avoid the flow of phase change material. Several heat-conducting fins 315 are arranged in this way to form a flow channel in the heat storage cavity 311 for deflecting the molten phase change material.

[0059] In some embodiments of this application, the heat storage component is fixed between the volute 100 and the housing 2, and is located on the side opposite to the air inlet of the volute 100, that is, on the side where the volute rear plate 120 is located. The heat storage component can be fixed on the housing 2 or on the volute rear plate 120.

[0060] The first channel 312 and the second channel 313 are located on opposite sides of the heat storage cavity 311, so that they can fully exchange heat with the phase change material in the heat storage cavity 311. The first channel 312 and the second channel 313 are both vertically extending channels to facilitate the internal liquid circulation.

[0061] In some embodiments of this application, such as Figure 13 As shown, the first channel 312 includes multiple first sub-channels 316 arranged in parallel. One end of each of the multiple first sub-channels 316 converges into one, and the other end of each of the multiple first sub-channels 316 converges into one, that is, they converge at the outlet end and the inlet end respectively. Similarly, the second channel 313 includes multiple second sub-channels arranged in parallel. One end of each of the multiple second sub-channels converges into one, and the other end of each of the multiple second sub-channels converges into one. This increases the surface area of ​​the first channel 312 and the second channel 313, thereby accelerating the heat exchange rate.

[0062] In some embodiments of this application, the thermally conductive and heat-storing body 310 includes a box body 317 and a box cover 318 disposed on the top surface of the box body 317, with the box body 317 and the box cover 318 sealingly fitted together.

[0063] Specifically, such as Figures 9 to 11 As shown, a sealing ring 319 groove is provided on the contact surface of the box body 317 and the box cover 318. The sealing ring 319 is installed in the sealing ring 319 groove of the box body. The sealing is achieved by multiple screws passing through the screw mounting holes of the box cover 318 and locking them with the screw locking holes of the box body 317.

[0064] In some embodiments of this application, the heat storage component further includes a heat-insulating and flame-retardant outer layer (not shown), which covers the circumferential outer surface of the heat-conducting and heat-storing body 310 to reduce heat loss.

[0065] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A range hood, comprising a housing and a volute assembly inside the housing, wherein the housing has an air inlet, the volute assembly includes a volute and a fan, and the volute includes a volute enclosure plate, characterized in that, Also includes: The self-cleaning component includes: A heat storage component includes a heat-conducting and heat-storing body, wherein a heat storage cavity, a first channel and a second channel are formed inside the heat-conducting and heat-storing body, and the heat storage cavity is filled with a phase change material; The first pipe is connected to the first channel to form a first circulation pipe, and the first pipe is located at the air inlet of the smoke hood; The second pipeline is connected to the second channel to form a second circulation pipeline, and the second pipeline is attached to the outer surface of the volute enclosure plate. The first and second circulation pipes are respectively equipped with liquid pumps and valves for controlling the opening of liquid circulation in their respective pipes; The control module is used to select one of the circulation pipes to start liquid circulation based on the working status of the range hood.

2. The range hood according to claim 1, characterized in that, The first pipe is laid in a curved shape on the air inlet of the smoke machine, and the second pipe is bent and fixed to the outer surface of the volute casing.

3. The range hood according to claim 2, characterized in that, A pipe fixing bracket is fixed on the air inlet of the smoke hood, and the first pipe is fixed on the pipe fixing bracket.

4. The range hood according to claim 1, characterized in that, The heat storage cavity is provided with a plurality of spaced-apart heat-conducting fins, which form flow channels within the heat storage cavity for the molten phase change material to flow through.

5. The range hood according to claim 1, characterized in that, The heat storage component is fixed between the volute and the housing, and is located on the side opposite to the air inlet of the volute; The first channel and the second channel are located on opposite sides of the heat storage cavity and are vertically extending channels.

6. The range hood according to claim 5, characterized in that, The first channel includes multiple first sub-channels arranged in parallel, with one end of the multiple first sub-channels converging into one, and the other end of the multiple first sub-channels converging into one; the second channel includes multiple second sub-channels arranged in parallel, with one end of the multiple second sub-channels converging into one, and the other end of the multiple first sub-channels converging into one.

7. The range hood according to claim 5, characterized in that, The thermally conductive and heat-storing body includes a box body and a box cover disposed on the top surface of the box body, wherein the box body and the box cover are sealed together.

8. The range hood according to claim 7, characterized in that, The heat storage component also includes a heat-insulating and flame-retardant outer layer, which covers the circumferential outer surface of the heat-conducting and heat-storing body.

9. The range hood according to claim 8, characterized in that, The outer surface of the volute enclosure is also covered with heat insulation and noise reduction components, and the portion of the second pipeline that is in contact with the outer surface of the volute enclosure is sandwiched between the heat insulation and noise reduction components.

10. The range hood according to claim 1, characterized in that, The liquid in the first circulation pipe is an aqueous solution of ethylene glycol, deionized water, or fluorinated liquid; the liquid in the second circulation pipe is an aqueous solution of ethylene glycol, deionized water, or fluorinated liquid.

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