Self-cleaning smoke exhaust fan

Abstract

The utility model provides a self-cleaning smoke exhaust fan, which comprises a smoke exhaust fan main body, an exhaust fan and a steam generating device, the steam generating device comprises a steam generating assembly and an injection pipe, one end of the injection pipe is of a closed pipeline structure, and the other end of the injection pipe is connected with the steam generating assembly. A plurality of injection holes are formed in the closed end of the injection pipe at intervals, the injection holes are communicated with an inner cavity of the injection pipe, and the injection pipe extends into the exhaust fan; the pressure control valve is mounted on the injection pipe, after high-temperature steam generated by the steam generator reaches a preset pressure value, the pressure control valve is opened, and the high-temperature steam with preset pressure flows to the injection hole and is sprayed into the fan blades in the exhaust fan, so that the oil stain cleaning effect on the fan blades of the exhaust fan can be ensured; and meanwhile, the steam sprayed out through the spraying holes is high in temperature and high in pressure, so that the steam can be sprayed out at high speed in a gas state and cannot be accumulated at the spraying holes to form water scales.

Description

Technical Field

[0001] The utility model relates to the technical field of fan equipment, in particular to a self-cleaning smoke exhaust fan. Background Art

[0002] The range hood is an electrical appliance used in home kitchens to remove oil fumes produced during cooking. After the range hood has been used for a period of time, the volute and impeller of the exhaust fan will be covered with oil and must be disassembled and cleaned, which is very troublesome. Not only are they difficult to clean, but the performance of the machine may deteriorate due to repeated disassembly. If they are not cleaned, the noise and vibration will increase, the suction will weaken, the cooking fumes will become larger and cannot be discharged, and will diffuse in the kitchen, causing the accumulation of PM2.5 concentration, which is more harmful if inhaled for a long time.

[0003] In this regard, some range hood manufacturers are researching range hood equipment with self-cleaning function. At present, the most popular is the steam-cleaning range hood equipment which uses steam to clean the exhaust fan fumes. The heated steam is sprayed to the exhaust fan blades for cleaning, wherein the hot steam is provided by a steam generator, and the hot steam generated by the steam generator is directly transported to the exhaust fan blades through a pipe for spraying. This method of directly spraying the generated steam for cleaning is prone to poor cleaning effect due to insufficient steam pressure and is prone to scale formation at the pipe nozzle, resulting in nozzle blockage. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of the utility model is to provide a self-cleaning smoke exhaust fan to solve the problems of poor cleaning effect and easy formation of scale at the nozzle due to insufficient steam pressure.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The present application provides a self-cleaning smoke exhaust fan, the smoke exhaust fan comprising a smoke exhaust fan body and an exhaust fan, the exhaust fan being installed in an inner cavity of the smoke exhaust fan body, the smoke exhaust fan body being formed with an air outlet and an air inlet, the smoke exhaust fan also comprising a steam generating device, the steam generating device comprising a steam generating assembly for generating high-temperature steam and a spray pipe, one end of the spray pipe being a closed pipe structure, the other end of the spray pipe being connected to the steam generating assembly, a plurality of spray holes being arranged at intervals at the closed end of the spray pipe, the spray holes being connected to the inner cavity of the spray pipe, the spray pipe extending to the interior of the exhaust fan for spraying high-temperature steam onto the exhaust fan blades.

[0007] Furthermore, a water collection groove is formed on the bottom plate of the smoke exhaust fan body, and an inclined portion is formed between the notch of the water collection groove and the edge of the bottom plate, and the inclined portion gradually slopes downward from the edge of the bottom plate toward the notch of the water collection groove.

[0008] Furthermore, the smoke exhaust fan also includes a sewage extraction device, and the sewage extraction device is connected to the water storage tank through a pipeline.

[0009] Furthermore, the steam generating assembly includes a water pump, a steam generator, a water pipe and a pressure control valve, one end of the water pump is connected to an external water tank, the other end of the water pump is connected to the water inlet end of the steam generator through the water pipe, the air outlet end of the steam generator is connected to the injection pipe, and the pressure control valve is arranged between the steam generator and the injection pipe.

[0010] Furthermore, the exhaust fan is fixedly installed in the inner cavity of the smoke exhaust fan body by means of a motor fixing plate, and the motor fixing plate includes a first connecting portion fixedly connected to the outer edge of the exhaust fan, a second connecting portion fixedly connected to the outer end surface of the motor, and a connecting portion connected between the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion are arranged perpendicular to each other.

[0011] Furthermore, there are four motor fixing plates, and the four motor fixing plates are evenly spaced apart along the circumferential direction.

[0012] Furthermore, a wind wheel air guide plate is installed at the air inlet of the wind wheel in the exhaust fan, and the exhaust fan is fixedly mounted on the wind wheel air guide plate through the motor fixing plate.

[0013] The beneficial effects of the utility model are:

[0014] 1. By installing a pressure control valve on the injection pipe, when the high-temperature steam generated by the steam generator reaches the preset pressure value, the pressure control valve opens, and the high-temperature steam with the preset pressure will flow to the injection hole and spray to the fan blades in the exhaust fan, thereby ensuring the oil cleaning effect on the exhaust fan blades. At the same time, since the steam sprayed through the injection hole is high temperature and high pressure, the steam will be sprayed out at the injection hole at a high speed in a gaseous state, and scale will not accumulate at the injection hole;

[0015] 2. A water trough is formed on the bottom plate, and an inclined portion is formed between the notch of the water trough and the edge of the bottom plate. The sewage generated by the high-temperature cleaning device after cleaning the exhaust fan blades is thrown outward under the action of the blades and flows to the opposite side walls of the exhaust fan body. The sewage flows downward along the side and converges into the water trough through the inclined portion, thereby avoiding the sewage formed after high-temperature steam cleaning being directly discharged into the oil collecting tank equipped with the range hood itself, which causes the liquid level of the oil collecting tank to suddenly increase and overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the self-cleaning smoke exhaust fan in the embodiment of the present application.

[0017] Figure 2 This is a schematic diagram of the exploded structure of the installation and assembly of the self-cleaning smoke exhaust fan in the embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the coordination structure between the steam generating device and the exhaust fan in the embodiment of the present application.

[0019] Figure 4 It is a schematic diagram of the structure of the installation and coordination between the steam generating device and the exhaust fan in the embodiment of the present application.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the steam generating device in the embodiment of the present application.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the base plate in the embodiment of the present application.

[0022] Figure 7 This is a schematic diagram of the structure of the bottom plate in the embodiment of the present application when viewed from above.

[0023] Figure 8 for Figure 7 Schematic diagram of the AA section structure.

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the motor fixing plate in the embodiment of the present application.

[0025] In the figure:

[0026] 100-smoke exhaust fan, 10-smoke exhaust fan body, 11-air outlet, 12-air inlet, 13-bottom plate, 14-water trough, 15-inclined portion, 20-exhaust fan, 30-steam generating device, 31-water pipe, 32-steam generator, 33-pressure control valve, 34-injection pipe, 35-injection hole, 40-wind wheel air guide plate, 50-motor fixing plate, 51-first connecting portion, 52-second connecting portion, 53-connecting portion. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] See attached Figure 1 To Attachment Figure 5 As shown, the present embodiment provides a self-cleaning smoke exhaust fan 100, which includes a smoke exhaust fan body 10, an exhaust fan 20 and a steam generating device 30. The exhaust fan 20 is installed in the inner cavity of the smoke exhaust fan body 10. The smoke exhaust fan body 10 is formed with an air outlet 11 and an air inlet 12. The steam generating device 30 can be installed on the periphery of the smoke exhaust fan body 10 and can extend to the interior of the exhaust fan 20, cooperate with the exhaust fan 20, and use the high-temperature steam generated by it to clean the oil stains on the fan blades in the exhaust fan 20.

[0029] Combined with reference to Figure 4 To Attachment Figure 5 As shown, the steam generating device 30 includes a steam generating assembly for generating high-temperature steam and a spray pipe 34. The steam generating assembly includes a water pump, a steam generator 32, a water pipe 31 and a pressure control valve 33. One end of the water pump is connected to an external water tank for extracting steam water from the water tank. The other end of the water pump is connected to the water inlet end of the steam generator 32 through the water pipe 31, the air outlet end of the steam generator 32 is connected to the spray pipe 34, and the pressure control valve 33 is arranged between the steam generator 32 and the spray pipe 34. Among them, one end of the spray pipe 34 is a closed pipe structure, and the other end of the spray pipe 34 is connected to the steam generating assembly. A plurality of spray holes 35 are arranged at intervals at the closed end of the spray pipe 34, and the spray holes 35 are connected to the inner cavity of the spray pipe 34. The spray pipe 34 extends to the inside of the exhaust fan 20, and is used to spray high-temperature steam to the fan blades of the exhaust fan 20.

[0030] The water pump delivers the water drawn from the water tank to the steam generator 32, and the steam generator 32 heats the water to form high-temperature steam. The formed high-temperature steam enters the pressure control valve 33. When the pressure of the high-temperature steam reaches the preset value for opening the pressure control valve, the pressure control valve 33 will open. After the pressure control valve 33 is opened, the high-temperature and high-pressure steam enters the injection pipe 34 and is ejected from the injection hole 35 in the injection pipe 34. Since the steam ejected from the injection hole 35 is high-temperature and high-pressure steam, the steam acts on the blades of the exhaust fan 20, and its cleaning effect on oil stains is better. Moreover, the steam is in the form of high-pressure ejection, and it will not form scale at the injection hole 35, and will not cause the injection hole 35 to be blocked.

[0031] Combined with reference to Figure 6 To Attachment Figure 8 As shown, a water trough 14 is formed in the middle of the bottom plate 13 of the smoke exhaust fan body 10, and an inclined portion 15 is formed between the notch of the water trough 14 and the edge of the bottom plate 13, and the inclined portion 15 gradually inclines downward from the edge of the bottom plate 13 to the notch of the water trough 14. The sewage generated by the high-temperature cleaning device after cleaning the fan blades of the exhaust fan 20 is thrown outward under the action of the fan blades and flows to the opposite side walls of the smoke exhaust fan body 10. The sewage flows downward along the side and converges into the water trough 14 through the inclined portion 15, avoiding the sewage formed after high-temperature steam cleaning directly discharged into the oil collection tank configured by the range hood itself, which causes the oil collection tank liquid level to suddenly increase and overflow.

[0032] Combined with reference to Figure 2 and attached Figure 3 As shown, a wind wheel air guide plate 40 is installed at the air inlet of the wind wheel in the exhaust fan 20. The arrangement of the wind wheel air guide plate 40 is more conducive to the external air entering the exhaust fan 20.

[0033] See attached Figure 2 , Attachment Figure 3 And attached Fig. 9 As shown, the exhaust fan 20 is fixedly installed in the inner cavity of the smoke exhaust fan body 10 through the motor fixing plate 50. The motor fixing plate 50 includes a first connecting portion 51 fixedly connected to the outer edge of the exhaust fan 20, a second connecting portion 52 fixedly connected to the outer end surface of the motor, and a connecting portion 53 connected between the first connecting portion 51 and the second connecting portion 52, and the first connecting portion 51 and the second connecting portion 52 are arranged perpendicular to each other. In some embodiments, the exhaust fan 20 can be fixedly installed on the outer edge of the smoke exhaust fan body 10 by using four of the above-mentioned motor fixing plates 50 evenly spaced along the circumferential direction.

[0034] The exhaust fan 20 is installed by adopting the motor fixing plate 50 of the above-mentioned structural form, which can make the installation and assembly of the exhaust fan 20 simpler and faster. That is, when the exhaust fan 20 is installed, the second connecting portion 52 is firstly attached to the outer peripheral surface of the exhaust fan 20 and fixed, and then the first connecting portion 51 is attached to the outer edge of the exhaust fan 20 and fixed, thereby completing the installation of the exhaust fan 20 in the inner cavity of the smoke exhaust fan body 10.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A self-cleaning smoke exhaust fan, comprising a smoke exhaust fan body and an exhaust fan, wherein the exhaust fan is installed in an inner cavity of the smoke exhaust fan body, and the smoke exhaust fan body is formed with an air outlet and an air inlet, characterized in that: The smoke exhaust fan also includes a steam generating device, which includes a steam generating assembly for generating high-temperature steam and a spray pipe, one end of the spray pipe is a closed pipe structure, and the other end of the spray pipe is connected to the steam generating assembly. A plurality of spray holes are arranged at intervals at the closed end of the spray pipe, and the spray holes are connected to the inner cavity of the spray pipe. The spray pipe extends to the interior of the exhaust fan and is used to spray high-temperature steam onto the exhaust fan blades.

2. The self-cleaning smoke exhaust fan according to claim 1, characterized in that: A water collection groove is formed on the bottom plate of the smoke exhaust fan body, and an inclined portion is formed between the notch of the water collection groove and the edge of the bottom plate, and the inclined portion gradually slopes downward from the edge of the bottom plate toward the notch of the water collection groove.

3. The self-cleanable smoke exhaust fan according to claim 2, characterized in that: The smoke exhaust fan also includes a sewage extraction device, and the sewage extraction device is connected to the water storage tank through a pipeline.

4. The self-cleaning smoke exhaust fan according to claim 1, characterized in that: The steam generating assembly includes a water pump, a steam generator, a water pipe and a pressure control valve. One end of the water pump is connected to an external water tank, and the other end of the water pump is connected to the water inlet end of the steam generator through the water pipe. The air outlet end of the steam generator is connected to the injection pipe, and the pressure control valve is arranged between the steam generator and the injection pipe.

5. The self-cleaning smoke exhaust fan according to claim 1, characterized in that: The exhaust fan is fixedly installed in the inner cavity of the smoke exhaust fan body by means of a motor fixing plate, and the motor fixing plate includes a first connecting portion fixedly connected to the outer edge of the exhaust fan, a second connecting portion fixedly connected to the outer end surface of the motor, and a connecting portion connected between the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion are arranged perpendicular to each other.

6. The self-cleanable smoke exhaust fan according to claim 5, characterized in that: There are four motor fixing plates, and the four motor fixing plates are evenly spaced apart along the circumferential direction.

7. The self-cleanable smoke exhaust fan according to claim 5 or 6, characterized in that: A wind wheel air guide plate is installed at the air inlet of the wind wheel in the exhaust fan, and the exhaust fan is fixedly installed on the wind wheel air guide plate through the motor fixing plate.

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