Range hood

Abstract

The utility model belongs to the technical field of electric appliances, and particularly discloses a range hood. The range hood comprises a machine shell and a fan arranged in the machine shell and further comprises a heating device, the heating device comprises a shell and a heating assembly, the shell wraps the outer side of the machine shell, a hot air cavity is defined by the shell and the machine shell, and the shell is provided with an air inlet communicating with the hot air cavity and the external environment. The machine shell is provided with a hot air inlet communicating with the hot air cavity and an inner cavity of the machine shell. The air inlet and the hot air inlet are formed in the circumferential direction of the machine shell at intervals. The heating assembly is arranged in the hot air cavity so as to heat airflow flowing through the heating assembly, and the draught fan can guide external airflow to sequentially pass through the air inlet, the hot air cavity, the hot air inlet and the inner cavity of the machine shell to enter the draught fan. The cleaning range and the cleaning effect of the interior of the range hood can be improved, and the use performance of the range hood is improved.

Description

Technical Field

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

[0002] Range hoods are commonly used kitchen appliances in modern homes. They use an internal fan to draw cooking fumes into the hood and then exhaust them into a public duct or the external environment, thus purifying the kitchen environment and improving the cooking experience.

[0003] When a range hood is working, the fan rotates, carrying cooking fumes through the inlet, the inside of the fume hood, and the inside of the air box before expelling them. Therefore, grease accumulates on the surface and inside of the fan casing and the air box. Over time, this can lead to bacterial growth, reduced fan performance, and fire hazards. To clean range hoods, current technologies typically involve attaching an electric heating film to the surface of the fan casing to melt and drip off the grease; or introducing hot steam or hot water into the casing to clean the inside of the fan using high-temperature steam or hot water.

[0004] Existing cleaning methods for range hoods typically only allow for partial cleaning of the inside of the fan housing, resulting in incomplete cleaning. This leads to the accumulation of grease in certain areas inside the range hood over time, affecting the long-term user experience. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a range hood that can effectively solve the problem of incomplete cleaning caused by existing range hoods only being able to perform partial cleaning of the inside of the fan casing, thereby improving the comprehensiveness of the range hood's cleaning and enhancing the user experience.

[0006] The above-mentioned technical problems are solved by the following technical solutions:

[0007] A range hood includes a housing and a fan disposed inside the housing, and a heating device. The heating device includes a housing and a heating assembly. The housing is wrapped around the outside of the housing and forms a hot air cavity with the housing. The housing has an air inlet communicating with the hot air cavity and the external environment. The housing also has a hot air inlet communicating with the hot air cavity and the inner cavity of the housing. The air inlet and the hot air inlet are spaced apart in the circumferential direction of the housing.

[0008] The heating component is disposed in the hot air cavity to heat the airflow flowing through the heating component. The fan can guide the external airflow sequentially through the air inlet, the hot air cavity, the hot air inlet and the inner cavity of the casing into the fan.

[0009] Compared with the prior art, the range hood described in this utility model has the following advantages: By setting the heating component around the outer casing and forming a hot air cavity within the casing and outer shell, the hot air can not only clean the grease inside the fan, but also melt the grease adhering to the inner wall of the casing and other internal components. The melted grease is then removed by the hot air, achieving thorough cleaning of the range hood's interior and increasing the cleaning range, thus improving the cleaning effect. Simultaneously, since the heating device is located on the outer casing, modifications to the internal structure of the casing are reduced, lowering the cost of improving the range hood. Furthermore, because the heating device is located on the outer casing, and the air inlet and hot air inlet are spaced apart circumferentially along the casing, the hot air in the hot air cavity can be guided to flow circumferentially around the casing, increasing the flow path of the hot air on the outer casing and improving the uniformity of heating, thereby further enhancing the cleaning effect of the range hood.

[0010] In one embodiment, the housing extends at least along one side of the housing in the left-right direction to the other opposite side of the housing in the left-right direction, the hot air cavity has two ends along the circumferential direction of the housing, the air inlet is disposed at the first end of the hot air cavity, the hot air inlet is disposed at the second end of the hot air cavity, and at least a portion of the heating assembly is disposed at the first end of the hot air cavity.

[0011] In one embodiment, the housing includes a smoke hood and a wind box connected to the top of the smoke hood, the heating device is arranged around the outside of the wind box, and the hot air inlet is disposed on the side wall of the wind box.

[0012] In one embodiment, the housing has a U-shaped structure and the housing covers the left and right sides and the front side of the air box. The air inlet is located on the rear side of the left and right side plates of the housing, and the hot air inlet is located on the rear side of the left and right side walls of the air box.

[0013] And / or, the air box has an electrical cavity and a fan cavity separated by a partition plate, the fan is installed in the fan cavity, the air outlet of the fan is sealed and installed on the lower side of the partition plate, a check valve is installed on the upper side of the partition plate, and the air outlet of the fan communicates with the inner cavity of the check valve; the housing extends upward from the top of the smoke hood to the upper end of the fan cavity and is located below the electrical cavity.

[0014] In one embodiment, the housing includes a plurality of side plates that are bent and connected sequentially along the periphery of the housing, each side plate being disposed opposite one side wall of the housing, and the heating assembly being disposed on at least the side plate having the air inlet;

[0015] The heating assembly includes a heating tube arranged in a serpentine pattern on the side plate portion; and / or, a mounting bracket is installed on the inner side of the side plate portion, the mounting bracket having a mounting plate portion spaced apart from the side plate portion, and the heating assembly is installed on the side of the mounting plate portion away from the side plate portion.

[0016] In one embodiment, the heating device further includes a thermostat that controls the on / off state of the heating component.

[0017] In one embodiment, the range hood further includes a baffle assembly that can selectively open or close the hot air inlet.

[0018] In one embodiment, the baffle assembly includes a baffle member and a stop drive member, the upper end of the baffle member being rotatably mounted on the housing so that the baffle member can rotate and switch between a closed position that closes the hot air inlet and an open position that opens the hot air inlet.

[0019] The stop drive has a stop state and a non-stop state. When the stop drive is in the stop state, it stops the baffle from rotating when it is in the closed position. When the baffle is in the non-stop state, it can rotate to the open position under the negative pressure generated by the operation of the fan.

[0020] In one embodiment, the stop drive is mounted on the outside of the housing;

[0021] And / or, the baffle assembly further includes a fixing frame, the fixing frame being detachably mounted to the housing, the stop drive being mounted to the fixing frame, and the upper end of the baffle being rotatably mounted to the fixing frame;

[0022] And / or, the stop drive includes an electromagnetic lock, the locking rod of the electromagnetic lock is vertically arranged, the electromagnetic lock is in the stop state when the power is off, and the locking rod abuts against the baffle member in the closed position to restrict the rotation of the baffle member; the electromagnetic lock is in the non-stop state when the power is on, and the locking rod retracts upward to disengage from the baffle member.

[0023] In one embodiment, the baffle includes a shaft mounting portion and a baffle portion, the shaft mounting portion being rotatably mounted to the fixed frame via a rotating shaft, and the baffle portion closing or opening the hot air inlet;

[0024] When the stop drive is in the stop state, the shaft mounting part is located between the locking rod and the outer wall of the housing, and the locking rod is in line contact or surface contact with the shaft mounting part. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the disassembled structure of a range hood provided in an embodiment of the present utility model;

[0027] Figure 3 A cross-sectional view of a range hood provided in an embodiment of this utility model;

[0028] Figure 4 A schematic diagram of the heating device provided in an embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the disassembled structure of the heating device provided in an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the heating assembly provided in an embodiment of the present utility model;

[0031] Figure 7 A schematic diagram of the structure of the housing and baffle assembly in a closed state according to an embodiment of the present utility model;

[0032] Figure 8 for Figure 7 A magnified view of a section at point I;

[0033] Figure 9 This is a schematic diagram of the baffle assembly provided in the embodiment of the present utility model when it is in the open state;

[0034] Figure 10 This is a schematic diagram of the structure of the baffle provided in an embodiment of the present utility model;

[0035] Figure 11 This is a structural schematic diagram of the fixing frame provided in an embodiment of the present utility model.

[0036] Label Explanation:

[0037] 1. Casing; 11. Smoke hood; 12. Air box; 121. First side wall; 122. Second side wall; 1221. Hot air inlet; 123. Front wall; 124. Fan chamber; 125. Electrical chamber; 13. Partition plate;

[0038] 2. Heating device; 21. Housing; 211. Housing body; 2111. Side plate; 2112. Air inlet; 212. Upper folded edge; 213. Rear folded edge; 214. Lower folded edge; 22. Heating assembly; 221. Heating tube; 2211. Straight tube; 2212. Bent tube; 222. Fixing plate; 223. Connecting rod; 23. Mounting bracket; 231. Mounting plate; 232. Upper flip-up plate; 233. Connecting part; 24. Bracket; 241. First plate; 242. Second plate; 243. Arc-shaped part; 25. Thermostat;

[0039] 3. Baffle assembly; 31. Stop drive component; 311. Locking rod; 32. Baffle component; 321. Shaft mounting part; 3211. Side part; 3212. End plate part; 322. Baffle part; 323. Transition part; 324. Reinforcing edge part; 33. Fixing frame; 331. First connecting plate part; 332. Second connecting plate part; 333. Side flange part; 34. Rotating shaft;

[0040] 4. Fan; 41. Volute; 42. Impeller; 43. Drive motor;

[0041] 5. Hot air chamber; 6. Check valve; 7. Electrical box. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] This embodiment provides a range hood that can automatically clean itself, improve the cleaning range and effect inside the range hood, and enhance the user experience.

[0047] like Figures 1 to 3 As shown, the range hood includes a housing 1, a fan 4 disposed inside the housing 1, and an exhaust pipe connected to the air outlet of the fan 4. The housing 1 has an inlet that communicates with its inner cavity. When the fan 4 is running, a negative pressure is formed at the inlet, so that the smoke flows sequentially through the inlet, the inner cavity of the housing 1, and the inside of the fan 4 before being discharged through the exhaust pipe.

[0048] In this embodiment, the range hood further includes a heating device 2, which comprises a housing 21 and a heating assembly 22. The housing 21 surrounds the outer side of the casing 1 and forms a hot air cavity 5. The housing 21 has an air inlet 2112 connecting the hot air cavity 5 to the external environment, and a hot air inlet 1221 connecting the hot air cavity 5 to the inner cavity of the casing 1. The hot air inlet 1221 and the air inlet 2112 are spaced apart circumferentially along the casing 1. The heating assembly 22 is disposed within the hot air cavity 5 to heat the airflow flowing into the hot air cavity 5. The fan 4 guides external airflow sequentially through the air inlet 2112, the hot air cavity 5, the hot air inlet 1221, and the inner cavity of the casing 1 into the fan 4.

[0049] The range hood provided in this embodiment, by enclosing a housing 21 on the outside of the housing 1, allows the heating component 22 to heat the airflow within the housing 21 and the hot air cavity 5 enclosed by the housing 1. The heated hot air flows within the hot air cavity 5 and acts on the side wall of the housing 1, thereby heating the side wall of the housing 1 and melting the grease on the side wall of the housing 1. At the same time, the hot air in the hot air cavity 5 enters the interior of the housing 1 through the hot air inlet 1221, heating the components inside the housing 1 and melting the grease on the surface of the components inside the housing 1. Furthermore, the operation of the fan 4 allows the hot air inside the housing 1 to enter the fan 4, thereby heating and melting the grease adhering to the inner wall of the fan 4's volute 41 and impeller 42.

[0050] Therefore, the above-mentioned configuration allows the hot air to not only clean the grease inside the fan 4, but also melt the grease adhering to the inner wall of the casing 1 and other components inside the casing 1. The melted grease is then removed by the hot air, achieving thorough cleaning of the inside of the range hood and increasing the cleaning range, thus improving the cleaning effect. Simultaneously, since the heating device 2 is located on the outside of the casing 1, modifications to the internal structure of the casing 1 are reduced, lowering the cost of improving the range hood. Furthermore, because the heating device 2 is located on the outside of the casing 1, and the air inlet 2112 and the hot air inlet 1221 are spaced apart circumferentially around the casing 1, the hot air in the hot air chamber 5 can be guided to flow circumferentially around the casing 1, increasing the flow path of the hot air inside the casing 1 and improving the uniformity of heating, thereby further enhancing the cleaning effect of the range hood.

[0051] In one embodiment, the housing 1 includes a smoke collection hood 11 and a fan box 12. The fan box 12 is disposed on top of the smoke collection hood 11. The smoke collection hood 11 has a smoke inlet and a smoke collection chamber communicating with the smoke inlet. An exhaust pipe is installed on the fan box 12. The fan 4 is disposed inside the smoke collection hood 11 or the fan box 12, and the heating device 2 is disposed around the fan box 12. Since the shape of the fan box 12 is more regular than that of the smoke collection hood 11 and its size is relatively smaller, this arrangement facilitates the placement of the heating device 2 on the outside of the housing 1, reduces the difficulty of installing the heating device 2, and reduces the improvement cost of the range hood.

[0052] In another embodiment, the housing 1 includes a smoke collection hood 11 and a fan box 12. The smoke collection hood 11 has a smoke inlet and a smoke collection chamber communicating with the smoke inlet. The fan box 12 is located below the smoke collection hood 11, that is, the range hood is an integrated range hood and stove. The fan 4 is located inside the fan box 12. The cabinet of the integrated stove is provided with a ventilation opening on the outside of the air inlet 2112 so that external air can enter the cabinet through the ventilation opening and then enter the fan box 12 through the air inlet 2112.

[0053] In another embodiment, the range hood is an island-style range hood, whose casing 1 has a consistent appearance and is typically circular or rectangular in cross-section, with the heating device 2 directly surrounding the casing 1.

[0054] In one embodiment, the fan 4 is disposed inside the air box 12, thereby placing the fan 4 closer to the hot air inlet 1221. This ensures that most of the hot air guided by the fan 4 is concentrated inside the air box 12 and then flows out through the inner cavity of the fan 4, reducing the probability of hot air acting on the inside of the smoke hood 11. In other embodiments, the fan 4 is disposed inside the smoke hood 11. The fan 4 guides external air into the hot air chamber 5 through the air inlet 2112 and is heated. The heated hot air flows through the hot air inlet 1221, sequentially through the air box 12 and the smoke chamber, and then enters the fan 4, thereby melting the oil stains inside the air box 12 and the smoke chamber.

[0055] To further enhance the cleaning effect of hot air on the inside of the housing 1, in one embodiment, the housing 21 extends at least along one side of the housing 1 in the left-right direction to the other opposite side of the housing 1 in the left-right direction. The hot air cavity 5 has two ends along the circumference of the housing 1. An air inlet 2112 is disposed at the first end of the hot air cavity 5, and a hot air inlet 1221 is disposed at the second end of the hot air cavity 5. At least a portion of the heating components 22 are disposed at the first end of the hot air cavity 5.

[0056] The air entering the hot air chamber 5 from the air inlet 2112 is heated by the heating component 22 to form hot air. This hot air then flows around the outside of the casing 1 to the hot air inlet 1221, and then enters the air box 12. This extends the flow path of the hot air within the hot air chamber 5, thereby increasing the area of ​​effect of the hot air on the side walls of the casing 1, improving the uniformity of heating throughout the casing 1, and ultimately enhancing the melting effect of oil stains on the inner wall of the casing 1. This design significantly increases the circumferential flow path of the hot air in the casing 1, effectively ensuring the uniformity of heating on all side walls of the casing 1.

[0057] The bellows 12 has a first side wall 121 and a second side wall 122 disposed opposite to each other in the left-right direction. The bellows 12 also includes a front wall 123 connected between the front ends of the first side wall 121 and the second side wall 122, and a rear wall connected between the rear ends of the first side wall 121 and the second side wall 122. In one embodiment, the housing 21 extends from the first side wall 121 to the second side wall 122, thereby surrounding at least three sides of the bellows 12.

[0058] In one embodiment, the housing 21 encloses the left and right sides and the front side of the air box 12, and the left and right ends of the housing 21 extend rearward to the rear ends of the first side box wall 121 and the second side box wall 122. This increases the coverage area of ​​the air box 12 by the hot air cavity 5 while preventing the housing 21 from affecting the wall-mounted installation of the range hood, thus ensuring the ease of installation of the range hood.

[0059] Furthermore, the air inlet 2112 is located on the rear side of the first side box wall 121, while the hot air inlet 1221 is located on the rear side of the second side box wall 122. This allows the hot air to flow forward along the rear side of the first side box wall 121 to the front box wall 123 of the air box 12, and then flow in the left and right direction to the second side box wall 122 before flowing backward to the hot air inlet 1221 on the rear side of the second side box wall 122.

[0060] The air box 12 has an electrical cavity 125 and a fan cavity 124 separated by a partition plate 13. The fan 4 is installed in the fan cavity 124, and the air outlet of the fan 4 is sealed and installed on the lower side of the partition plate 13. A check valve 6 is installed on the upper side of the partition plate 13, and the air outlet of the fan 4 is connected to the inner cavity of the check valve 6. An electrical box 7 is installed inside the electrical cavity 125. This reduces the impact of oil fumes on the electrical components inside the electrical box 7 and improves the safety and reliability of the electrical components.

[0061] Specifically, the fan 4 includes a volute 41, an impeller 42 disposed within the volute 41, and a drive motor 43 that drives the impeller 42 to rotate. The outlet end of the volute 41 faces upward. A vent is provided on the partition plate 13, with the outlet end facing the vent. A check valve 6 is installed opposite the vent, and its inner cavity communicates with the vent. A sealing element surrounding the vent is provided between the check valve 6 and the partition plate 13 to prevent the flue gas flowing from the vent from flowing into the electrical cavity 125. A smoke exhaust pipe is installed at the outlet end of the check valve 6 to discharge the oil fumes.

[0062] It is worth noting that the specific structures of the fan 4, the check valve 6, and the electrical box can all be set with reference to existing technologies. This is not the focus of this utility model and will not be elaborated here.

[0063] In one embodiment, the housing 21 extends upward from the top of the fume hood 11 to the upper end of the fan cavity 124 and is located below the electrical cavity 125. This arrangement allows the heating device 2 to extend upward to act on the upper end of the fan cavity 124, thereby increasing the heating range of the hot air on the cavity wall of the fan cavity 124 and improving the grease cleaning effect inside the fan cavity 124. At the same time, placing the heating device 2 below the electrical cavity 125 can avoid the problem of excessively high temperature inside the electrical cavity 125 due to the action of hot air, which could affect the operating performance of electrical components, thus improving the safety and reliability of the electrical components inside the electrical cavity 125. Furthermore, the partition plate 13 is made of heat-insulating material to reduce the transfer of heat from the fan cavity 124 to the electrical cavity 125.

[0064] In one embodiment, the housing 21 has a U-shaped structure with the opening facing backward, and the housing 21 covers the left and right sides and the front side of the bellows 12. The air inlet 2112 is located on the rear side of the left and right side plates of the housing 21, and the hot air inlet 1221 is located on the rear side of the left and right side walls of the bellows 12. By setting the housing 21 into a rearward U-shaped structure, it is convenient to achieve the effect of the housing 21 covering three sides of the bellows 12.

[0065] like Figures 3 to 5 As shown, specifically, the shell 21 includes a U-shaped shell body 211, the shell body 211 having three side plate portions 2111 that are connected by being bent vertically in sequence, each side plate portion 2111 being opposite to and spaced apart from the side box wall corresponding to the bellows 12, wherein two side plate portions 2111 are opposite to and spaced apart in the left and right direction.

[0066] In one embodiment, the rear ends of the two side plates 2111 arranged opposite to each other are bent in the direction toward each other to form rear folded edge portions 213. The rear folded edge portions 213 fit against the rear side of the air box 12 to seal the two rear ends of the hot air cavity 5 while realizing the installation and positioning of the housing 21 relative to the air box 12 in the front-back direction, so as to prevent the housing 21 from moving forward relative to the air box 12.

[0067] Each side panel 2111 has an upwardly folded edge 212 at its upper end, which is in contact with the side wall of the bellows 12 to seal the upper port of the hot air chamber 5 and prevent the hot air flow in the hot air chamber 5 from flowing upward. Furthermore, the upwardly folded edge 212 is folded downward to form a fitting edge, which fits against the side wall of the bellows 12 to prevent sharp edges on the housing 21 from scratching the bellows 12. Each side panel 2111 also has an inwardly folded edge 214 at its lower end, which abuts against the bottom of the smoke hood 11 to prevent sharp edges on the lower end of the housing 21 from scratching the smoke hood 11.

[0068] To ensure sufficient airflow into the hot air chamber 5, multiple air inlets 2112 are spaced vertically. This increases the total airflow area while reducing the size of individual air inlets 2112, thereby increasing the airflow. Furthermore, the multiple vertically spaced air inlets 2112 also improve the uniformity of hot air distribution in the vertical direction, thus enhancing the uniformity of heating the air box 12. Further, multiple sets of air inlets 2112 are spaced along the front-to-back direction, each set including multiple vertically spaced air inlets 2112.

[0069] In one embodiment, the vertical coverage height of the heating component 22 is at least greater than half the vertical height of the air box 12, and the front-to-back coverage width of the heating component 22 is at least greater than half the front-to-back width of the air box 12. This ensures that when air flows from the air inlet 2112 along the hot air cavity 5 toward the hot air inlet 1221, there is a continuous heating process, which increases the heating range of the heating component 22, improves the heating efficiency of the heating component 22 for the airflow, and helps to improve the heating uniformity of the air in the hot air cavity 5, avoiding the problem of hot air stratification caused by localized heating of the airflow in the vertical direction.

[0070] To improve the ease of installation of the heating assembly 22, in one embodiment, the housing 21 includes a plurality of side plates 2111 that are sequentially bent and connected along the periphery of the housing 1. Each side plate 2111 is positioned opposite one side wall of the housing 1, and the heating assembly 22 is mounted on the side plate 2111 that has at least one air inlet 2112. The heating assembly 22 includes a heating tube 221, which is arranged in a serpentine bend along the side plate 2111. This arrangement of the heating tube 221 increases the heating range of the heating assembly 22 and simplifies its structural configuration. In other embodiments, the heating assembly 22 may include a heating film or heating wire laid on the side plate 2111.

[0071] The heating tube 221 includes a plurality of straight tube sections 2211 arranged opposite to each other and spaced apart, and a bent tube section 2212 connected between two adjacent straight tube sections 2211; the straight tube sections 2211 extend in the vertical direction, and the plurality of straight tube sections 2211 extend in the width direction of the side plate section 2111; or, the straight tube sections 2211 extend in the width direction of the side plate section 2111, and the plurality of straight tube sections 2211 are arranged at intervals in the vertical direction.

[0072] Specifically, the housing 21 includes three side plates 2111, and the heating assembly 22 is disposed on the side plate 2111 with an air inlet 2112. This ensures the heating effect on the hot air entering the hot air chamber 5 and the heating effect of the hot air on the side wall of the air box 12 facing the air inlet 2112, while reducing the cost of the heating device 2. In other embodiments, the heating assembly 22 can also be disposed on other side plates 2111.

[0073] To improve the ease of installation of the heating component 22, in one embodiment, the heating device 2 includes a mounting bracket 23, which is detachably mounted on the housing 21, and the heating tube 221 is mounted on the mounting bracket 23, thereby enabling the overall assembly and disassembly of the module formed by the heating component 22 and the mounting bracket 23 on the housing 21.

[0074] In one embodiment, the mounting bracket 23 includes a mounting plate portion 231, which is opposite to and spaced apart from the side plate portion 2111. The heating component 22 is mounted on the side of the mounting plate portion 231 away from the side plate portion 2111 to reduce the heat transferred outward through the mounting bracket 23 and the housing 21, thereby reducing energy loss. Further, a connecting portion 233 is provided on the side of the mounting plate portion 231 away from the air box 12, and the connecting portion 233 is detachably connected to the housing 21. Preferably, one connecting portion 233 is provided at each of the four corners of the mounting plate portion 231 to ensure the stability and reliability of the heating component 22's installation on the housing 21.

[0075] like Figure 5 and Figure 6 As shown, the upper end of the mounting plate 231 is folded into an upper flap 232 along the direction towards the air box 12. Two mounting holes are provided on the upper flap 232, through which both ends of the heating tube 221 pass vertically to facilitate the mounting and positioning of the heating tube 221 on the mounting bracket 23. The heating assembly 22 also includes a fixing plate 222, which is sleeved on and fixed relative to the two outermost straight tube sections 2211. The fixing plate 222 is detachably connected to the upper flap 232.

[0076] Furthermore, the heating assembly 22 also includes a connecting rod 223, which spans all straight tube sections 2211 and is connected to the straight tube sections 2211. A bracket 24 is provided on the side of the mounting plate section 231 away from the side plate section 2111. The connecting rod 223 is locked in the bracket 24 to fix the heating tube 221 on the mounting bracket 23 and improve the ease of disassembly and assembly of the heating assembly 22 on the mounting bracket 23.

[0077] The bracket 24 includes a first plate portion 241 and a second plate portion 242 connected in an L-shape. The first plate portion 241 is connected to the mounting bracket 23. The end of the second plate portion 242 away from the first plate portion 241 is bent upward to form an arc-shaped portion 243. The arc-shaped portion 243 and the second plate portion 242 together form a slot, in which the connecting rod 223 is engaged. This structure of the bracket 24 facilitates the engagement of the connecting rod 223 into the slot through the gap between the arc-shaped portion 243 and the first plate portion 241, improving the ease of installation and disassembly of the heating tube 221. At least two brackets 24 are spaced apart along the extension direction of the connecting rod 223 to ensure the installation stability of the heating assembly 22.

[0078] In one embodiment, the heating assembly 22 further includes a thermostat 25. The thermostat 25 controls the heating assembly 22 to disconnect when the temperature exceeds a first preset temperature, thereby preventing the hot air cavity 5 and the interior of the casing 1 from becoming too hot and affecting the normal operation of the range hood. Simultaneously, when the temperature inside the hot air cavity 5 is below a second preset temperature, the thermostat 25 controls the heating element 221 to start heating, to prevent the hot air temperature from being too low to achieve the desired grease melting effect. The first preset temperature is 70℃~90℃, and the second preset temperature is 55℃~70℃. The thermostat 25 is mounted on the mounting bracket 23.

[0079] It is worth noting that the temperature control principle of the thermostat 25 is existing technology, and this embodiment will not provide further explanation.

[0080] like Figures 7 to 9 As shown, to improve the reliability of the range hood, in one embodiment, the range hood further includes a baffle assembly 3. The baffle assembly 3 can selectively open or close the hot air inlet 1221, so that when the range hood does not need to be cleaned, the baffle assembly 3 can block the hot air inlet 1221 to block the flow between the hot air cavity 5 and the air box 12, thereby preventing oil fumes from entering the hot air cavity 5 through the hot air inlet 1221 and causing pollution to the heating component 22, or causing some oil fumes to escape, thus improving the reliability of the heating component 22 and the range hood. During the cleaning process, the hot air inlet 1221 can be opened, so that the airflow in the hot air cavity 5 can enter the interior of the housing 1 through the hot air inlet 1221.

[0081] In one embodiment, the baffle assembly 3 includes a baffle member 32 and a stop drive member 31. The upper end of the baffle member 32 is rotatably mounted on the housing 1, allowing the baffle member 32 to rotate between a closed position and an open position with the hot air inlet 1221 open. The stop drive member 31 has a stop state and an open state. When the stop drive member 31 is in the stop state, it stops the rotation of the baffle member 32 in the closed position. When the stop drive member 31 is in the open state, the baffle member 32 can rotate to the open position under the negative pressure generated by the operation of the fan 4. When the baffle member 32 is in the closed position, it is nearly vertical. When the baffle member 32 is in the open position, it is inclined from top to bottom toward the inside of the housing 1, and the lower end of the baffle member 32 is located inside the housing 1.

[0082] This configuration ensures that when the range hood does not require cleaning, the stop drive component 31 is in the stop state and the baffle component 32 is in the closed position, blocking the hot air inlet 1221. This prevents the hot air inlet 1221 from affecting the normal fume extraction of the range hood, ensuring smooth fume extraction and reducing the probability of fumes escaping through the hot air inlet 1221. When the range hood needs cleaning, the stop drive component 31 is in the open state, allowing the fan 4 to operate while the fumes escape from the casing 1. An internal negative pressure is created, causing the baffle 32 to automatically flip and open the hot air inlet 1221 under the action of the negative pressure. This connects the air inlet 2112, the hot air chamber 5, the hot air inlet 1221, and the inner cavity of the casing 1 in sequence, enabling the delivery of hot air from the hot air chamber 5 to the interior of the casing 1. When the fan 4 stops running, the baffle 32 automatically returns to the closed position under gravity. Then, the stop drive 31 is switched to the stop state, which stops the baffle 32 from rotating. This design reduces the energy consumption of the stop drive 31 and improves the ease of selection for the stop drive 31.

[0083] Specifically, when the stop drive member 31 is in the stop state and the baffle member 32 is in the closed position, the baffle assembly 3 is in the closed state; when the stop drive member 31 is in the non-stop state and the baffle member 32 is in the open position, the baffle assembly 3 is in the open state.

[0084] In other embodiments, the baffle 32 is slidably or rotatably mounted on the housing 1, and the stop drive 31 is directly connected to the baffle 32. The stop drive 31 drives the baffle 32 to switch between the closed position of the hot air inlet 1221 and the open position of the hot air inlet 1221, that is, the stop drive 31 drives the baffle 32 from the closed position to the open position, and the stop drive 31 drives the baffle 32 from the open position to the closed position.

[0085] In one embodiment, the stop drive 31 is installed on the outside of the housing 1, thereby preventing oil fumes from polluting the stop drive 31 and improving the operational reliability of the baffle assembly 3.

[0086] To improve the ease of installation of the baffle assembly 3 on the housing 1, the baffle assembly 3 also includes a fixing bracket 33. The fixing bracket 33 is detachably installed on the housing 1, the stop drive component 31 is installed on the fixing bracket 33, and the upper end of the baffle component 32 is rotatably installed on the fixing bracket 33. This allows the baffle assembly 3 to be installed and removed from the housing 1 as a whole. Specifically, the fixing bracket 33 is installed on the outside of the housing 1.

[0087] In one embodiment, the stop drive component 31 includes an electromagnetic lock. The locking rod 311 of the electromagnetic lock is vertically arranged. When the electromagnetic lock is de-energized, it is in a stop state, and the locking rod 311 abuts against the baffle 32 when it is in the closed position to restrict the rotation of the baffle 32. When the electromagnetic lock is energized, it is in a non-stop state, and the locking rod 311 retracts upward to disengage from the baffle 32. By using an electromagnetic lock as the stop drive component 31, when the electromagnetic lock is de-energized, the locking rod 311 extends downward from its main structure under the action of gravity and stops the baffle 32; when the electromagnetic lock is energized, the locking rod 311 moves upward to disengage from the baffle 32 under the action of electromagnetic attraction. This stop drive component 31 has a simple structure, low driving cost, and is easy to install.

[0088] In other embodiments, the stop drive 31 may also be a push rod motor or other electrically driven structure capable of switching between a stop state and a non-stop state.

[0089] like Figure 9 and Figure 10 As shown, to improve the stopping reliability of the electromagnetic lock on the baffle 32 in the stopped state, in one embodiment, the baffle 32 includes a shaft mounting part 321 and a baffle part 322. The shaft mounting part 321 is rotatably mounted on the fixed frame 33 via a rotating shaft 34, and the baffle part 322 closes or opens the hot air inlet 1221. When the stop drive member 31 is in the stopped state, the shaft mounting part 321 is located between the locking rod 311 and the outer wall of the housing 1, and the locking rod 311 is in line contact or surface contact with the shaft mounting part 321. When the stop drive 31 is in the stop position, the shaft mounting part 321 is positioned between the locking rod 311 and the housing 1, and the locking rod 311 abuts against the shaft mounting part 321, which can restrict the rotation of the upper end of the shaft mounting part 321, thereby restricting the rotation of the baffle 32 in the stop position. By making line contact or surface contact between the locking rod 311 and the shaft mounting part 321, the stopping stability and reliability of the locking rod 311 on the baffle 32 can be improved, ensuring the rotation restriction effect of the stop drive 31 on the baffle 32.

[0090] In one embodiment, the shaft mounting portion 321 is connected to the baffle portion 322 via the transition portion 323, and the baffle portion 322 is closer to the inside of the housing 1 than the shaft mounting portion 321. This allows the baffle portion 322 to be rotatably located at the hot air inlet 1221 and to be rotatably located inside the housing 1 while the shaft mounting portion 321 is installed on the outside of the housing 1. This improves the ease of installation of the baffle portion 32 on the mounting bracket 33 while ensuring the sealing effect of the baffle portion 32 on the hot air inlet 1221.

[0091] Specifically, when the baffle 32 is in the closed position, the baffle portion 322 is vertically arranged and located inside the hot air inlet 1221 to block the hot air inlet 1221. Furthermore, the front and rear sides and the lower side of the baffle portion 322 are bent to form reinforcing edges 324 to enhance the structural strength and rigidity of the baffle portion 322, ensuring the sealing effect on the hot air inlet 1221 while reducing the probability of deformation of the baffle 32 and preventing the sharp edges on the baffle portion 322 from scratching the housing 1.

[0092] Furthermore, the shaft mounting portion 321 includes three side portions 3211 connected by sequential bending, one side portion 3211 being connected to the baffle portion 322, and the three side portions 3211 forming a U-shaped structure. The two ends of one side portion 3211 are vertically bent to form end plate portions 3212, which abut against the corresponding edges of the other two side portions 3211 to ensure the overall structural strength and rigidity of the shaft mounting portion 321. The end plate portion 3212 has a mounting shaft hole for the rotating shaft 34 to pass through. The side portion 3211 connected to the baffle portion 322 is arranged parallel to the baffle portion 322. When the baffle assembly 3 is in the closed state, the locking rod 311 makes line contact with the side portion 3211 furthest from the baffle portion 322. The structure of this shaft mounting part 321 is easy to process, reduces the processing difficulty of the baffle part 32, and facilitates the line contact between the locking rod 311 and the shaft mounting part 321, ensuring the rotational stop effect of the locking rod 311 on the baffle part 322.

[0093] like Figure 9 and Figure 11 As shown, to improve the installation stability of the stop drive component 31 and the baffle component 32 on the mounting bracket 23, in one embodiment, the fixing bracket 33 includes a first connecting plate portion 331 and a second connecting plate portion 332 that are vertically connected. The first fixing plate 222 is fitted to and detachably connected to the outer side wall of the housing 1. The stop drive component 31 is installed on the second connecting plate portion 332, thereby facilitating the adjustment of the installation position of the stop drive component 31 in the left-right direction and ensuring that the locking rod 311 can contact the baffle component 32. Further, both ends of the first connecting plate portion 331 are vertically connected to side flange portions 333 in the front-rear direction. The shaft mounting portion 321 is located between the two side flange portions 333, and both ends of the rotating shaft 34 are rotatably inserted through the two side flange portions 333.

[0094] Furthermore, the second connecting plate portion 332 is formed by partially punching the first connecting plate portion 331 to reduce the difficulty of installing the fastener.

[0095] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0096] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this 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 utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A range hood, comprising a housing (1) and a fan (4) disposed inside the housing (1), characterized in that, It also includes a heating device (2), which includes a housing (21) and a heating component (22). The housing (21) is wrapped around the outside of the casing (1) and forms a hot air cavity (5) with the casing (1). The housing (21) has an air inlet (2112) that connects the hot air cavity (5) and the external environment. The casing (1) has a hot air inlet (1221) that connects the hot air cavity (5) and the inner cavity of the casing (1). The air inlet (2112) and the hot air inlet (1221) are spaced apart in the circumferential direction of the casing (1). The heating component (22) is disposed in the hot air cavity (5) to heat the airflow flowing through the heating component (22). The fan (4) can guide the external airflow through the air inlet (2112), the hot air cavity (5), the hot air inlet (1221) and the inner cavity of the casing (1) into the fan (4).

2. The range hood according to claim 1, characterized in that, The housing (21) extends at least along one side of the housing (1) in the left-right direction to the other opposite side of the housing (1) in the left-right direction. The hot air cavity (5) has two ends along the circumference of the housing (1). The air inlet (2112) is disposed at the first end of the hot air cavity (5). The hot air inlet (1221) is disposed at the second end of the hot air cavity (5). At least a portion of the heating assembly (22) is disposed at the first end of the hot air cavity (5).

3. The range hood according to claim 2, characterized in that, The housing (1) includes a smoke hood (11) and a bellows (12) connected to the top of the smoke hood (11). The heating device (2) is arranged around the outside of the bellows (12), and the hot air inlet (1221) is arranged on the side wall of the bellows (12).

4. The range hood according to claim 3, characterized in that, The housing (21) has a U-shaped structure and the housing (21) wraps around the left and right sides and the front side of the air box (12). The air inlet (2112) is located on the rear side of the left and right side plates of the housing (21), and the hot air inlet (1221) is located on the rear side of the left and right side walls of the air box (12). And / or, the air box (12) has an electrical cavity (125) and a fan cavity (124) separated by a partition plate (13) on the upper and lower sides, the fan (4) is installed in the fan cavity (124), the air outlet of the fan (4) is sealed and installed on the lower side of the partition plate (13), a check valve (6) is installed on the upper side of the partition plate (13), and the air outlet of the fan (4) communicates with the inner cavity of the check valve (6); the housing (21) extends upward from the top of the smoke hood (11) to the upper end of the fan cavity (124) and is located below the electrical cavity (125).

5. The range hood according to claim 1, characterized in that, The housing (21) includes a plurality of side plates (2111) that are bent and connected in sequence along the periphery of the housing (1). Each side plate (2111) is disposed opposite to one side wall of the housing (1). The heating component (22) is disposed on the side plate (2111) that has at least the air inlet (2112). The heating assembly (22) includes a heating tube (221) arranged in a serpentine manner on the side plate portion (2111); and / or, a mounting bracket (23) is installed inside the side plate portion (2111), the mounting bracket (23) having a mounting plate portion (231) spaced apart from the side plate portion (2111), and the heating assembly (22) is installed on the side of the mounting plate portion (231) away from the side plate portion (2111).

6. The range hood according to any one of claims 1-5, characterized in that, The heating device (2) also includes a thermostat (25), which controls the on / off state of the heating component (22).

7. The range hood according to any one of claims 1-5, characterized in that, The range hood also includes a baffle assembly (3), which can selectively open or close the hot air inlet (1221).

8. The range hood according to claim 7, characterized in that, The baffle assembly (3) includes a baffle member (32) and a stop drive member (31). The upper end of the baffle member (32) is rotatably mounted on the housing (1) so that the baffle member (32) can rotate and switch between the closed position of closing the hot air inlet (1221) and the open position of opening the hot air inlet (1221). The stop drive (31) has a stop state and a non-stop state. When the stop drive (31) is in the stop state, the stop drive (31) stops the rotation of the baffle (32) which is in the closed position. When the stop drive (31) is in the non-stop state, the baffle (32) can rotate to the open position under the negative pressure generated by the operation of the fan (4).

9. The range hood according to claim 8, characterized in that, The stop drive component (31) is installed on the outside of the housing (1); And / or, the baffle assembly (3) further includes a fixing frame (33), the fixing frame (33) being detachably mounted on the housing (1), the stop drive (31) being mounted on the fixing frame (33), and the upper end of the baffle member (32) being rotatably mounted on the fixing frame (33); And / or, the stop drive (31) includes an electromagnetic lock, the locking rod (311) of the electromagnetic lock is vertically arranged, the electromagnetic lock is in the stop state when the power is off, and the locking rod (311) abuts against the baffle (32) in the closed position to restrict the rotation of the baffle (32); the electromagnetic lock is in the non-stop state after the power is on, and the locking rod (311) retracts upward to disengage from the baffle (32).

10. The range hood according to claim 9, characterized in that, The baffle (32) includes a shaft mounting part (321) and a baffle part (322). The shaft mounting part (321) is rotatably mounted on the fixed frame (33) via a rotating shaft (34). The baffle part (322) closes or opens the hot air inlet (1221). When the stop drive member (31) is in the stop state, the shaft mounting part (321) is located between the locking rod (311) and the outer wall of the housing (1), and the locking rod (311) is in line contact or surface contact with the shaft mounting part (321).

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