JP6730062B2 - Range food - Google Patents

Description

The present invention relates to a range hood, and more particularly to a range hood with an automatic cleaning function.

Conventionally, in a range hood that is installed near a cooking device and sucks and collects oil smoke generated by cooking, the sucked oil smoke is collected by adhering it to a blower, etc. A range hood is known in which a cleaning liquid is sprayed to clean the hood.

For example, Patent Document 1 discloses a range hood capable of efficiently capturing oil and fat while reducing the ventilation resistance of the filter, and cleaning and cleaning the oil and fat attached to the filter. In this range hood, a cylindrical filter is provided in the fan casing of the blower on the outer circumference of the fan, and a cleaning liquid pump is used to supply the cleaning liquid to the filter from a nozzle located near the center of the fan. Thus, the area of the filter can be made larger than that of the intake port to reduce the ventilation resistance, and the oil/fat can be captured with high efficiency, and the oil/fat adhering to the filter can be washed with the cleaning liquid.

JP, 2008-286514, A

However, in such a range hood, the problem that the cleaning liquid is scattered from the suction port of the fan casing to the outside at the time of cleaning, and the cleaning liquid injection part such as the nozzle is provided at the center of the suction port, so There is a problem that the water supply pipe for supplying the cleaning liquid to the portion itself or the jetting portion becomes a hindrance to the suction, which deteriorates the suction performance of the blower.
Therefore, the present invention provides a range hood that prevents the cleaning liquid from splashing out of the fan casing during cleaning and does not reduce the performance of sucking air containing oil depending on the position of the injection unit. ..

To solve the above problem, suction air containing oil generated by the cooking, a range hood for collecting oil, is driven to rotate by a motor, a blade root vehicles Ru generate a flow of air containing oil A fan casing having the impeller therein, having a suction port for sucking air containing the oil by rotation of the impeller, and a spray mechanism for spraying a cleaning liquid, and a cleaning mechanism for cleaning the impeller, The straight line connecting the base of the rotary shaft of the motor to the tip is substantially horizontal or inclined downward, and the injection unit is provided near the peripheral edge of the suction port and below the tip of the rotary shaft. is refers injection of cleaning fluid toward the inside of the fan casing from the inlet side, (1) the inner diameter of the suction port is smaller than the inner diameter of the impeller, the jetting portion, the rotation shaft of the motor When viewed from the direction, it is provided inside the impeller and outside the suction port, or (2) the injection unit has a part of the injection unit when viewed from the rotation axis direction of the motor. A range hood is provided , wherein the range hood is provided inside the suction port, and the other portion of the injection unit is provided outside the suction port .
According to this, since the injection unit is provided in the vicinity of the peripheral portion of the suction port and below the tip of the rotation shaft of the motor, the sprayed cleaning liquid is scattered from the suction port or the cleaning liquid is dripped from the spray unit. It is possible to provide a range hood that can prevent dripping and that does not reduce the performance of sucking air containing oil during exhaust operation.

Further, the injection unit may be provided upstream of the lowest point of the impeller in the rotation direction of the impeller.
According to this, the injection portion is provided below the tip of the rotation shaft of the motor and in the quadrant on the upstream side in the rotational direction from the lowest point of the impeller, so that it is injected toward the impeller and collides Since the cleaning liquid moves downward, it can be prevented from splashing from the suction port. Further, when the injection unit is provided at such a quarter position, compared to the case where the injection unit is provided below the tip of the rotation shaft of the motor and downstream in the rotational direction from the lowest point of the impeller. Since the amount of air containing oil, etc., collides with the jetting portion is small, it is possible to reduce the adhesion of dirt.

Furthermore, the inner diameter of the suction port may be smaller than the inner diameter of the impeller, and the injection unit may be provided inside the impeller and outside the suction port.
According to this, since the injection unit is provided inside the impeller and outside the suction port, the fan casing exists on the front side of the injection unit, so that the cleaning liquid is prevented from splashing over the suction port. In addition, the cleaning liquid can be sprayed toward the inside of the impeller where dirt is likely to adhere, so that the cleaning can be effectively performed.

Further, the spraying unit may spray the cleaning liquid further downstream from the spraying unit in the rotation direction of the impeller.
According to this, by injecting the cleaning liquid from the injection unit to the downstream side, the relative speed at which the cleaning liquid collides with the impeller becomes slower, so that the collision of the cleaning liquid can be further prevented from scattering.

As described above, according to the present invention, it is possible to prevent the cleaning liquid from splashing out of the fan casing during cleaning and prevent the performance of sucking the air containing oil depending on the position of the injection unit. Can be provided.

(A) Front view, (B) Top view, (C) Bottom view, (D) Left side view, (E) Right side view of the first embodiment of the range hood according to the present invention. (A) The perspective view seen from the upper right of a 1st Example of the cooker hood which concerns on this invention, and the perspective view seen from the lower right. The development perspective view seen from the lower right of the 1st example of the range hood concerning the present invention. Explanatory drawing explaining the washing|cleaning mechanism of 1st Example of the range hood which concerns on this invention. Sectional drawing in the AA cross section shown in FIG. 1 of the 1st Example of the cooker hood which concerns on this invention. Sectional drawing in the BB cross section shown in FIG. 1 of the 1st Example of the range hood which concerns on this invention. Sectional drawing in the BB cross section shown in FIG. 1 (state which removed the bell mouth) of the 1st Example of the range hood which concerns on this invention. Sectional drawing in the BB cross section shown in FIG. 1 (state which removed the bell mouth and the washing|cleaning mechanism) of 1st Example of the range hood which concerns on this invention. Sectional drawing in the CC cross section shown in FIG. 1 of the 1st Example of the cooker hood which concerns on this invention (state with the damper open). Sectional drawing in the DD cross section shown in FIG. 1 (state with the damper closed) of the first embodiment of the range hood according to the present invention. The (A) front view, the (B) top view, the (C) bottom view, the (D) left side view, and the (E) right side view of the bell mouth in the 1st example of the range hood concerning the present invention. (A) Front view, (B) Top view, (C) Bottom view, (D) Left side view, (E) Perspective view from the upper right of the tank in the first embodiment of the range hood according to the present invention. (When the lid is open), (F) Perspective view seen from the upper right (when the lid is closed). FIG. 2 is an enlarged cross-sectional view of the recovery part (A) in the DD cross-section shown in FIG. 1 of the first embodiment of the range hood according to the present invention, and an enlarged cross-sectional view of the dotted line portion in (B) (A). Sectional drawing in the cross section corresponded to the AA cross section shown in FIG. 1 of 2nd Example of the cooker hood which concerns on this invention.

Each embodiment according to the present invention will be described below with reference to the drawings.
<First embodiment>
The range hood 1 according to the present embodiment will be described with reference to FIGS. 1 to 13. The range hood 1 has a thin hood portion 2 having an inner panel 4 having a concave inner surface for collecting steam, oil smoke, and the like generated by cooking performed below. The hood part 2 is connected to the blower box 3 connected to the exhaust duct DU near the communication port 6 located slightly to the right of the rear surface. In addition, the hood portion 2 is provided with a straightening vane 5 below to increase the wind speed around the hood portion 2 so as to easily capture oil smoke and the like rising from below. On the front side of the hood portion 2, a switch 610 that is operated by the user to instruct the amount of air at the time of exhaust or to instruct to perform cleaning is provided. Further, a shutter SH for preventing backflow of air is provided near the exhaust duct DU.

The blower box 3 internally introduces an air flow AR containing oil smoke and the like captured by the hood section 2 into the blower box 3 through the communication port 6, and an air containing oil from the introduction section 7. A fan casing 200 having a suction port 210 for sucking air, an impeller 100 (also referred to as a fan) included in the fan casing 200, a motor 130 that rotationally drives the impeller 100, and an impeller 100 provided inside the impeller 100. The blower box 3 for communicating with the grease filter 120, the blade 110 of the impeller 100 and the cleaning mechanism 400 for cleaning the grease filter 120, and communicating with the fan casing 200 to remove oil and purify air to the exhaust duct DU. The exhaust port 500, which is an opening opened in the opening, and the damper 300 on the air flow path from the impeller 100 to the exhaust port 500, the rotation of the impeller 100, the opening and closing of the damper 300, the operation of the cleaning mechanism 400, and the like are controlled. And a control unit 600 for

The blower box 3 is provided slightly to the right of the hood portion 2 when viewed from the front. This is because, in the case of the present embodiment, the exhaust port 500 connected to the exhaust duct DU is provided on the left side surface of the blower box 3, and when the exhaust port 500 is provided on the right side surface, the blower box. 3 may be provided to the hood portion 2 slightly to the left of the front view. As described above, by locating the exhaust port 500 on the side surface of the blower box 3, it is possible to lower the effective height of the range hood 1 including the leading space of the exhaust duct DU than that provided on the upper surface of the blower box 3. This will improve the flexibility of the installation site.

The impeller 100 is a fan (blower) that generates an air flow AR in order to collect air containing oil generated by cooking performed below, as shown mainly in FIGS. 5, 6 and 10. is there. When the impeller 100 is rotationally driven by the motor 130, a flow AR of air is generated, and air containing oil moves between the flow straightening plate 5 and the inner surface panel 4. The introduction part 7 draws in the air containing the oil that has moved between the straightening vane 5 and the inner panel 4 through the communication port 6 upward. The introduction part 7 rises in the vertical direction from the communication port 6 while having a cross-sectional area approximately equal to the area of the communication port 6, and introduces the air flow AR to the suction port 210 of the fan casing 200 in a state containing oil.

The impeller 100 is a so-called sirocco fan, which has a plurality of blades 110 with a gap 115 between the blades 110 on a side surface of the cylinder. In this embodiment, as will be described later, the cleaning liquid collides with the inner surface 111 (the surface on the rotating shaft side) of the blade 110. Therefore, when the blade 110 sees one blade 110 from the rotating shaft 131. It is preferable that the inner surface of the one blade 110 is not hidden by the other blade 110 or the outer surface 114 of the blade 110 (the surface opposite to the surface on the rotation axis side). That is, when viewed from the rotation shaft 131, the edge 113 (outer edge) of the blade 110 on the fan casing 200 side is hidden by the rotation shaft-side edge 112 (inner edge) of the adjacent blade 110. Never. The fan (blower) used in the present invention is preferably the impeller 100, which is a centrifugal fan as in the present embodiment, but is not limited to this and may be an axial blower.

As shown in FIG. 5, the rotation shaft 131 of the motor 130 is installed so as to be substantially horizontal, so that the line connecting the base portion 132 and the tip 133 of the rotation shaft 131 is substantially horizontal, and the impeller 100 The rotation axis of is also almost horizontal. The motor 130 rotates the impeller 100 at high speed during exhaust operation which is a normal operation, and rotates the impeller 100 at relatively low speed during cleaning. The motor 130 and the impeller 100 are coupled to each other via a torque transmission plate 134. The rotational force transmission plate 134 is firmly coupled to each blade 110 of the impeller 100 so as to sufficiently resist the air resistance during exhaust operation and the liquid resistance during cleaning, and the rotational force transmission plate 134 is also provided. A boss groove 136 that receives the rotational force of the motor 130 by fitting the motor pin 135 provided on the rotating shaft 131 is provided on the center rear surface side of the impeller 100. Reliably communicate to.

As shown mainly in FIGS. 5 and 8, the grease filter 120 is a flat disk attached to the tip 133 of the rotating shaft 131 of the motor 130 so as to be perpendicular to the rotating shaft 131, and the outer edge of the blade 110 is a blade. It is attached so as to be close to the inner (rotating shaft side) edge 112. As a result, the leakage of air containing oil from between the blade 110 and the grease filter 120 is reduced, and the ratio of capturing oil is increased. Further, the grease filter 120 is mounted on the front side of the rotational force transmission plate 134 and substantially at the center of the blade 110 in the depth direction. Since the grease filter 120 is located on the upstream side of the air flow of the rotational force transmission plate 134, the oil component is prevented from adhering to the rotational force transmission plate 134, and the blade 110 is attached to a substantially central portion in the depth direction. This prevents oil from adhering to the inner side of the central portion.

The grease filter 120 has a hole through which air passes in a flat disk, and when the air passes through the hole by rotating with the impeller 100, the oil content collides with the meat portion other than the hole and adheres to the air. Remove the oil contained in. In addition, in this embodiment, the grease filter 120 is a flat disk, but it is not limited to this, and may be curved in a dish shape, or the cross section including the rotation shaft 131 of the motor 130 spreads to the front side. It may be a trapezoidal grease filter having a trapezoidal shape.

As shown mainly in FIGS. 5 and 9, the fan casing 200 includes a bell mouth 211 configured to smoothly draw the air flow AR around the suction port 210, and an impeller 100 inside. A damper 300 is included between the impeller 100 and the exhaust port 500 on the air flow path. The air flow AR generated by the impeller 100 is sucked into the fan casing 200 from the bell mouth 211 attached to the suction port 210, and the oil component included in the air flow AR is provided on the cylindrical side surface portion of the impeller 100. The impeller 110 or the impeller 100 collides with and adheres to the grease filter 120 provided inside the cylinder of the impeller 100. As a result, the oil content is removed from the oil-containing air, and the oil-free air passes inside the fan casing 200 and outside the impeller 100, and when the damper 300 is in the open state, the fan casing 200. Is discharged to the exhaust port 500 located on the side (left lateral direction) and is exhausted to the outside air through the exhaust duct DU connected to the exhaust port 500.

As shown in FIG. 9, the exhaust port 500 is provided at a position higher in the vertical direction than the position of the lowest point 200Z of the fan casing 200. That is, the position of the lowest point 500Z of the exhaust port 500 is higher than the position of the lowest point 200Z of the fan casing 200. According to experimental values, it is preferable that the line connecting the lowest point 500Z of the exhaust port 500 and the lowest point 200Z of the fan casing 200 has an angle of 10 degrees or more, and more preferably 15 degrees or more with the horizontal line. By doing so, oil or cleaning liquid that has adhered between the lowest point 500Z of the exhaust port 500 and the lowest point 200Z of the fan casing 200 can be smoothly guided to the lowest point 200Z of the fan casing 200. It is possible to prevent stagnation.

The rotation direction 100DR of the impeller 100 is right rotation when viewed from the front, and the air in the vicinity of the lowest point 200Z of the fan casing 200 is exhausted in a diagonally upper left direction like the air flow AR shown in this figure. It moves toward the mouth 500 and is exhausted. As described above, the exhaust port 500 is an opening opened on the side surface of the blower box 3 for communicating with the fan casing 200 and exhausting the purified air to the exhaust duct DU. As a result, the effective height of the range hood 1 including the space around the exhaust duct DU can be made lower than that provided on the upper surface of the blower box 3, and the flexibility of the installation location is improved.

As shown mainly in FIG. 9, the damper 300 is located inside the fan casing 200, and on the air flow path from the impeller 100 to the exhaust port 500 located laterally (left lateral direction) of the fan casing 200. And is provided in the vicinity of the exhaust port 500. The damper 300 has a rotating shaft 311 and rotates around the rotating shaft 311 to open and close a flow path of air. The damper may open and close the air flow path by a slide method or the like, but since the damper 300 has the rotating shaft 311, the hole formed in the fan casing 200 becomes the minimum size, and the wash water is discharged outside the fan casing 200. It becomes difficult to leak into. Further, since the holes formed in the fan casing 200 are small, the airtightness of the fan casing 200 is improved, and it is possible to efficiently exhaust air when the fan is driven.

The damper 300 shown in FIG. 9 is mainly in the state of exhaust operation, and the air from which oil has been removed from the inside of the fan casing 200 is exhausted to the exhaust port 500, so the flow path to the exhaust port 500 is opened. It is in a closed state (open state). The rotation shaft 311 of the damper 300 is located on the side deviated to the one end 310, and the one end 310 has the other end 320 of the damper 300 facing the one end 310 having the rotation shaft 311 when the damper 300 is in the open state. It is higher than the end 320). That is, the rotating shaft 311 is at the highest position in the damper 300 when in the open state. Thus, when the damper is in the open state, the rotating shaft is located higher than the other end, so that the amount of oil adhering to the damper flowing to the rotating shaft can be reduced, and the oil adheres to the rotating shaft 311 and rotates. It is possible to prevent the occurrence of troubles such as being disabled. In this embodiment, the rotary shaft 311 of the damper 300 is located at the one end 310, but it may be located on the side deviated to the one end 310 from the center of the damper 300 in the flow path direction.

The damper 300 in the open state is housed in the damper housing portion 330 that forms a recess inside the fan casing 200, and is configured so as not to resist the air flow AR. Further, when the damper 300 in the open state is housed in the damper housing portion 330, the damper 300 contacts the inside of the fan casing 200 only at the other end 320. When the damper 300 comes into contact with the fan casing 200 on the surface, it may be fixed due to oil. However, when the damper 300 comes into contact with only the other end 320, the damper 300 is fixed when the damper 300 is changed from the open state to the closed state. To prevent an obstacle that cannot be closed.

The bell mouth 211 is configured to be detachable from the fan casing 200 for easy cleaning, mainly as shown in FIG. The bottom view of this figure (C) is the front side when the bell mouth 211 is attached to the fan casing 200, and the plan view of this figure (B) is the back side facing the impeller 100. On the back side of the bell mouth 211, a part of a water supply pipe 450 and a jetting part 460 or a water supply part 460 connected to the tip of the water supply pipe 450 constituting a cleaning mechanism 400 described later are provided. When attached to the fan casing 200, the water supply pipe 450 on the main body side is connected. When the bell mouth 211 is attached to the fan casing 200, most of the jetting section 460/water supply section 460 is provided so as to be hidden by the bell mouth cover section 212 in a front view, so the jetting section 460/water supply section 460 is provided. Is less likely to be exposed to oil-containing air, making it difficult for oil to adhere.

The cleaning mechanism 400 is a mechanism for cleaning the blades 110 of the impeller 100 and the grease filter 120, mainly as shown in FIG. If the grease filter 120 is not provided inside the impeller 100, the cleaning mechanism 400 cleans the blades 110 of the impeller 100 because the blade 110 of the impeller 100 captures oil. The cleaning mechanism 400 includes a tank 410 that is housed in a tank housing 412 that is located on the bottom side of the bottom surface of the hood 2 to store the cleaning liquid, a water supply unit 460 that supplies the cleaning liquid into the fan casing 200, and a tank 410. To the water supply unit 460, a water supply pipe 450 for supplying the cleaning liquid to the water supply unit 460, a pump 420 arranged between the water supply unit 460 and the tank 410 for sucking the cleaning liquid from the tank 410, and a water supply pipe 450 between the tank 410 and the water supply unit 460. A foreign matter removal filter 440 that removes foreign matter mixed in the cleaning liquid therein, and a collection unit 430 that collects the cleaning liquid, which is supplied by the water supply unit 460 and has cleaned the impeller 100 and the like, into the tank 410.

The tank 410 is a cubic box in which the cleaning liquid can be stored, mainly as shown in FIGS. 11 and 12. Protrusions are appropriately formed so as to be stored in the tank storage portion 412, and the tank 410 is stored in the tank storage portion 412 by engaging the projections with the recesses of the tank storage portion 412. The tank storage portion 412 is provided on the back side of the bottom surface of the hood portion 2 slightly to the left, and the lid 413 of the tank storage portion 412 is provided.

The tank 410 is opened by pressing and is closed by removing the pressing force, a tank lid 411 is connected to a position corresponding to the tip of the water supply pipe 450 when stored, and a purifying filter portion 416 below the tank lid 411. And a hole 415. Since the hole diameter of the connection hole 415 is small and the tank lid 411 is closed in the taken out state, it is possible to prevent the cleaning liquid contained therein from spilling when the user carries the tank 410. The upper surface of the tank 410 is configured to be detachable from the body of the tank 410, and the inside can be washed by removing it. Further, the purification filter unit 416 removes and purifies oil and the like contained in the collected cleaning liquid in order to circulate the cleaning liquid and return it to the tank 410.

The water supply pipe 450 is a liquid pipe that draws the cleaning liquid from the liquid suction port 414 that sucks the cleaning liquid from the tank 410 to the water supply unit 460 that is located on the front side, which is the upstream side of the air flow of the impeller 100. A portion of the water supply pipe 450 located on the front side connected to the water supply unit 460 is configured as a pipe arranged on the back side of the bell mouth 211 (the impeller 100 side).

The pump 420 has an output that moves the cleaning liquid from the tank 410 to the water supply unit 460 located at a high position, and when the water supply unit 460 functions as the injection unit 460, an output that generates a water pressure for vigorously ejecting the cleaning liquid. Have. However, even in that case, since the injection unit 460 has a hole having an inner diameter similar to the inner diameter of the water supply pipe 450 and ejects from the hole, a large output is obtained as compared with the case of ejecting from a small hole. Does not need Further, it is preferable that the pump 420 can perform not only the forward rotation for moving the cleaning liquid in the direction from the tank 410 to the water supply unit 460 but also the reverse rotation for moving the cleaning liquid in the direction from the water supply unit 460 to the tank 410.

The water supply unit 460 supplies the cleaning liquid to the inside of the fan casing 200 in order to clean the blades 110 and the like of the impeller 100 with the cleaning liquid. When the cleaning liquid collides with the blades 110 and the grease filter 120, the cleaning liquid is activated. It often functions as an injection unit 460 that injects toward the blades 110 and the grease filter 120. In the present embodiment, the water supply unit 460 functions as the injection unit 460, and will be described below as the injection unit 460.

The injection unit 460 is configured to inject the cleaning liquid over a wide range toward the blade 110 of the impeller 100 and the grease filter 120 inside the fan casing 200. The injection unit 460 directly injects the cleaning liquid from the suction port 210 side toward the inside of the fan casing 200, that is, toward the inside of the grease filter 120 or the blades 110 where oil easily adheres. The injection unit 460 is preferably near the peripheral edge of the suction port 210, that is, near the blade 110 on the inner side of the impeller 100, and the closer it is, the better as long as it is not in contact. As a result, the cleaning liquid sprayed from the spray unit 460 collides strongly with the blade 110. Further, when the injection unit 460 is located at the center of the impeller 100, the injection unit 460 may interfere during the exhaust operation to reduce the performance of sucking air containing oil. Providing in the vicinity of the part does not cause such a problem.

In addition, the injection unit 460 is provided below the tip 133 of the rotary shaft 131 of the motor 130. For example, when the injection unit 460 is provided above the rotation shaft 131, the injection unit 460 injects the cleaning liquid toward the blades 110 located at a position higher than the rotation shaft 131 during rotation, and the cleaning liquid bounces after the collision and is sucked. It will fly over the mouth 210. Therefore, with such a configuration, it is possible to prevent the sprayed cleaning liquid from splashing from the suction port 210 and dropping the cleaning liquid from the spraying section 460.

Further, as shown in FIG. 7, when the rotation direction 100DR of the impeller 100 is right rotation, the injection unit 460 is below the tip 133 of the rotation shaft 131 of the motor 130 and is below the impeller 100 in a front view. It is preferably provided on the right side of the lowest point 100Z. That is, it is preferable that the injection unit 460 is provided below the tip end 133 of the rotary shaft 131 of the motor 130 and in the quadrant 100ZU upstream of the lowest point 100Z of the impeller 100 in the rotation direction 100DR. By providing the jetting section 460 in the quarter portion 100ZU, the cleaning liquid jetted toward the impeller 100 and colliding with it immediately moves downward in the rotational direction, so that it can be prevented from splashing from the suction port 210. Further, when the injection unit 460 is provided at such a quarter position, the injection unit 460 is provided below the tip 133 of the rotary shaft 131 of the motor 130 and downstream of the lowest point 100Z of the impeller 100 in the rotational direction. Since the amount of air containing oil or the like that collides with the jetting portion is smaller than that in the case where it is provided, it is possible to reduce the adhesion of dirt.

The inner diameter of the suction port 210 of the fan casing 200 is smaller than the inner diameter of the impeller 100 as mainly shown in FIGS. 6 and 7. As a result, the oil contained in the air that has passed through the suction port 210 collides with the inside of the blade 110 of the impeller 100. The injection unit 460 is provided inside the impeller 100 and outside the suction port 210 when viewed from the direction of the rotation shaft 131 of the motor 130. According to this, since the fan casing 200 is present on the front side of the injection unit 460, the cleaning liquid can be prevented from splashing over the suction port 210 and directed toward the inner side of the impeller 100 where dirt easily adheres. Since the cleaning liquid can be directly sprayed by this, effective cleaning can be achieved. When the bell mouth 211 is attached and used, the inner diameter of the suction port 210 may be regarded as the inner diameter of the opening of the bell mouth 211. The inner diameter refers to the distance from the center of the opening (in this embodiment, the intersection of the axial center line of the rotary shaft 131 and the opening) to the peripheral edge. The inner diameter of the bell mouth 211 in this embodiment is the center of the opening. May be the distance from to the most central portion of the bell mouth cover portion 212. That is, at least at the position where the injection unit 460 is provided, the inner diameter of the suction port 210 of the fan casing 200 (the inner diameter of the opening of the bell mouth 211 when the bell mouth 211 is attached and used) is the inner diameter of the impeller 100. The smaller it is, the better.

Further, the injection unit 460 may inject the cleaning liquid from the injection unit 460 toward the downstream side 100ZD in the rotation direction 100DR of the impeller 100 shown in FIG. 7. According to this, by injecting the cleaning liquid from the injection unit 460 to the downstream side 100ZD, the cleaning liquid colliding with the blades 110 of the impeller 100 smoothly flows to the downstream side in the rotation direction, and thus the colliding cleaning liquid is scattered. This can be prevented more.

As shown mainly in FIGS. 4, 12 and 13, the recovery unit 430 includes a bottom portion 214 of the fan casing 200 that receives the cleaning liquid after the spraying unit 460 sprays the blade 110 and the grease filter 120 to clean the fan, and the fan. The bottom portion 214 of the casing 200 is located at a position slightly closer to the tank 410 than the lowest point 200Z of the fan casing 200. The fan casing cleaning liquid discharge port 213 and the fan casing cleaning liquid discharge port 213 are located at the same position. The outlet 213 has a drain pipe 431 for returning the cleaning liquid discharged from the fan casing 200 to the tank 410.

As shown in FIG. 13, the fan casing cleaning liquid discharge port 213 is provided at a position slightly closer to the tank 410 than the lowest point 200Z of the fan casing 200, that is, at a position displaced from the lowest point 200Z toward the downstream side in the rotation direction 100DR. As a result, even if the cleaning liquid tries to rise to the exhaust port 500 from the bottom portion 214 of the fan casing 200 due to the rotation of the impeller 100, a large amount of the cleaning liquid can be guided to the fan casing cleaning liquid discharge port 213.

The drain pipe 431 extends obliquely downward so as to return the cleaning liquid to the tank 410 from a position corresponding to the fan casing cleaning liquid discharge port 213, and is arranged at a position corresponding to the tank lid 411 of the tank 410. By extending the drainage pipe 431 in a diagonally downward direction, it is possible to shift the tank 410 laterally from the lowest point 200Z of the fan casing 200, thereby making the overall height of the range hood 1 relatively small. Can be lowered.

When the tank lid 411 is housed in the tank housing portion 412, the tank lid 411 is pressed by the projecting portion 417 projecting from the upper surface of the tank housing portion 412 to receive the dirty cleaning liquid flowing from the drain pipe 431 into the tank 410. open. The contaminated cleaning liquid is filtered by the cleaning filter unit 416, and the cleaned cleaning liquid returns to the tank 410.

The cleaned cleaning liquid is sucked up again by the pump 420 from the liquid suction port 414 through the connection hole 415, and is supplied to the water supply pipe 450. It should be noted that the cleaning liquid circulated in this manner may contain foreign matter that cannot be removed by the purification filter unit 416 during the cleaning process, and may contain such foreign matter. In such a case, it may cause a failure of the pump 420. Therefore, one or more foreign matter removal filters 440 for removing foreign matter mixed in the cleaning fluid should be provided in the cleaning fluid supply pipe 450 between the tank 410 and the injection unit 460. Is preferred.

Further, when the cleaning liquid is moved from the spraying section 460 to the tank 410 by rotating the pump 420 in the reverse direction, the foreign matter removing filter 440 is provided between the tank 410 and the pump 420, so that the foreign matter when the forward direction cleaning liquid is flowing. Since the foreign matter attached to the removal filter 440 can be peeled off, it is possible to prevent the foreign matter removal filter 440 from remaining clogged with foreign matter and causing clogging.

Particularly, the foreign matter removal filter 440 is preferably provided between the tank 410 and the pump 420. This can prevent foreign matter from entering the inside of the pump 420. Further, when the pump 420 is rotated in the reverse direction, the foreign matter removal filter 440 is provided between the tank 410 and the pump 420, that is, on the upstream side of the pump in the forward direction of the cleaning liquid, so that the foreign matter can be prevented from entering the pump 420. ..

The connection hole 415 is provided with an elastic material, and the end surface of the water supply pipe 450 on the tank storage portion 412 side is pressed against the elastic material when stored in the tank storage portion 412, whereby the cleaning liquid may leak. Configured to not. On the contrary, the end surface of the water supply pipe 450 may be provided with an elastic material, and the connection hole 415 may be pressed against the elastic material.

The controller 600 controls the rotation of the motor 130 to control the rotation of the impeller 100, controls the rotation of a damper motor (not shown) to control the opening/closing of the damper 300, and controls the operation of the pump 420. By controlling, the operation of the cleaning mechanism 400 is controlled, and the motor 130, the damper motor, the pump 420, etc. are controlled based on the input of the switch 610. The control unit 600 is composed of a control program built in the microcomputer and is provided in the blower box 3 in the present embodiment, but is not particularly limited and may be provided in the hood unit 2.

The control unit 600 may control the rotation of the motor 130 based on the operation of the switch 610 by the user of the range hood 1, or may operate by receiving a remote control signal or an interlocking signal from the cooker, Alternatively, the oil content contained in the air may be detected to automatically perform a predetermined rotation control. Further, the control unit 600 may have a predetermined cleaning process for controlling the operation of the cleaning mechanism 400. Further, the control unit 600 controls the opening and closing of the damper 300 according to the rotation control of the impeller 100 and the operation of the cleaning mechanism 400.

<Second embodiment>
The range hood 1A in the present embodiment will be described with reference to FIG. In addition, in order to avoid duplicated description, the same components as those in the above-mentioned embodiment are designated by the same reference numerals, and different portions will be mainly described. The range hood 1</b>A includes a thin hood portion 2 having an inner surface panel 4 that is concave upward and an air blower box 3 connected to the hood portion 2 near the communication port 6.

The blower box 3 internally introduces an air flow AR containing oil smoke and the like captured by the hood portion 2 into the blower box 3 through the communication port 6, and an air containing oil from the introduction portion 7A. A fan casing 200A having a suction port 210 for sucking air, an impeller 100 included in the fan casing 200A, a motor 130 that rotationally drives the impeller 100, and a grease filter 120 provided inside the impeller 100, An opening formed in the blower box 3 for communicating the cleaning mechanism 400 for cleaning the blades 110 of the impeller 100 and the grease filter 120 with the fan casing 200A to remove oil and purify air to the exhaust duct DU. An exhaust port 500, a damper 300 on an air flow path from the impeller 100 to the exhaust port 500, a control unit 600 that controls rotation of the impeller 100, opening/closing of the damper 300, operation of the cleaning mechanism 400, and the like. Have.

The impeller 100 is a fan (blower) that generates an air flow AR in order to collect air containing oil that is generated by cooking performed below. When the impeller 100 is rotationally driven by the motor 130, a flow AR of air is generated, and air containing oil moves between the flow straightening plate 5 and the inner surface panel 4. The introduction part 7A draws in the air containing oil, which has moved between the straightening vane 5 and the inner surface panel 4, upward through the communication port 6. The introduction part 7A rises vertically so that the area gradually decreases from the communication port 6 toward the upper part, and introduces the air flow AR into the suction port 210 of the fan casing 200A while containing oil.

That is, the fan casing 200A is arranged in the blower box 3 such that the suction port 210 is inclined slightly downward. Then, the rotation shaft 131 of the motor 130 also tilts, and the line connecting the base 132 of the rotation shaft 131 to the tip 133 tilts downward from the horizontal. In this case, the injection unit 460 is preferably provided below the tip 133 of the rotary shaft 131 rather than below the base 132 of the rotary shaft 131 of the motor 130. This is because when the ejection unit 460 is located at a lower position, the ejection unit 460 is less likely to scatter beyond the suction port 210. The line connecting the base portion 132 of the rotary shaft 131 to the tip 133 in this embodiment is inclined about 20 degrees downward from the horizontal.

It should be noted that the present invention is not limited to the illustrated embodiments, and can be carried out with a configuration within a range that does not deviate from the contents described in each item of the claims. That is, the present invention is mainly illustrated and described mainly with respect to specific embodiments, but without departing from the scope of the technical idea and object of the present invention, with respect to the embodiments described above, the quantity, Those skilled in the art can make various modifications in application examples and other detailed configurations.

1 range hood 2 hood part 3 blower box 4 inner panel 5 straightening plate 6 communication port 7 introduction part 100 impeller (fan)
110 Blades 111 Inside of Blades 112 Edges of Blades on Rotating Shaft Side 113 Edges of Blades on Fan Casing Side 114 Outside of Blades 115 Gap between Blades 120 Grease Filter 130 Motor 131 Rotating Shaft 132 Base of Rotating Shaft 133 Tip of Rotating Shaft 134 Rotational Force Transmission Plate 135 Motor Pin 136 Boss Groove 200 Fan Casing 210 Suction Port 211 Bell Mouth 212 Bell Mouth Cover Part 213 Fan Casing Cleaning Solution Discharge Port 214 Fan Casing Bottom 300 Damper 310 One End 311 Rotating Shaft 320 Other End 330 Damper Housing 400 Cleaning Mechanism 410 Tank 411 Tank lid 412 Tank storage portion 413 Tank storage portion lid 414 Liquid suction port 415 Connection hole 416 Purification filter portion 417 Projection portion 420 Pump 430 Recovery portion 431 Drain pipe 440 Foreign matter removal filter 450 Water supply pipe (tank and injection portion) Flow path for cleaning liquid between)
460 Injection unit (water supply unit)
500 exhaust port 600 control part 610 switch 100Z impeller lowest point 100ZU impeller lowest point upstream quadrant 100DR impeller rotation direction 200Z fan casing lowest point 500Z exhaust port lowest point DU exhaust Duct SH Shutter AR Air flow

Claims (3)

A range hood that sucks in air containing oil generated by cooking and collects oil.
Is driven to rotate by a motor, a blade root vehicles Ru generate a flow of air containing oil,
A fan casing having the impeller therein, having a suction port for sucking air containing the oil by rotation of the impeller;
A cleaning mechanism that has a spraying unit that sprays a cleaning liquid, and that cleans the impeller,
Equipped with
The straight line connecting from the base of the rotary shaft of the motor to the tip is inclined substantially horizontally or downward,
The injection unit is disposed below the front end of the rotating shaft a peripheral portion near the suction port, shines injection of cleaning fluid toward from the inlet side to the inside of the fan casing,
(1) The inner diameter of the suction port is smaller than the inner diameter of the impeller, and the injection unit is provided inside the impeller and outside the suction port when viewed from the rotation axis direction of the motor. thing,
Or
(2) In the injection unit, a part of the injection unit is provided inside the suction port and the other part of the injection unit is provided outside the suction port when viewed from the rotation axis direction of the motor.
A range hood characterized by . The range hood according to claim 1, wherein the injection unit is provided on an upstream side of a lowest point of the impeller in a rotation direction of the impeller. The range hood according to claim 1 or 2, wherein the sprayer sprays the cleaning liquid further downstream from the sprayer in the rotation direction of the impeller.