JP2017187202A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove dirt by jetting a cleaning liquid across a range in which oil content easily attaches, even with a water supply pump whose water pressure is smaller than that of a conventional one.SOLUTION: A range hood sucks air containing oil content generated by cooking and collects the oil content. The range hood comprises: an impeller 100 rotationally driven by a motor 130, for generating an airflow containing oil content and for collecting the oil content; a fan casing 200 including the impeller inside, and having a suction port for sucking the air containing the oil content by the rotation of the impeller; and a cleaning mechanism having a jetting part 460 for jetting a cleaning liquid and for cleaning the impeller. The jetting part has a jetting port for jetting the cleaning liquid and a diffusion plate for diffusing the cleaning liquid jetted from the jetting port, and jets the cleaning liquid toward the inside of the fan casing from the suction port side.SELECTED DRAWING: Figure 15

Description

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

  Conventionally, in a range hood that is installed in the vicinity of a cooker and sucks and collects oil smoke generated by cooking, the sucked oil smoke is attached to a blower or the like and collected, and the dirt containing the attached oil is nozzleed. A range hood is known in which a cleaning liquid is sprayed to clean.

  For example, Patent Document 1 discloses a range hood intended to reduce the trouble of cleaning a filter in which oil, dust, or the like is adhered and accumulated. This range hood has a filter in which driving means is connected to the front of a blower casing disposed in a ventilation passage communicating the suction port and the discharge port, a cleaning casing surrounding the filter, and a large number of small injection ports. There are arranged nozzles, water supply means for supplying water to the nozzles, and means for collecting sewage scattered in the cleaning casing. The nozzle is configured by arranging a large number of injection holes with small holes in a straight line from the filter center side toward the filter circumferential end side, and the cleaning liquid can be sprayed over a wide range by spraying the cleaning liquid from each injection port.

JP 2008-126203 A

However, the nozzle having such a configuration requires a relatively high water pressure for injecting the cleaning liquid from the plurality of small-hole injection ports, and a water supply pump that satisfies the pressure is required.
Therefore, the present invention provides a range hood that ejects cleaning liquid over a range in which oil is easily attached even with a water supply pump having a lower water pressure than before, and removes dirt.

In order to solve the above problems, a range hood that sucks in air containing oil generated by cooking and collects the oil, and is driven by a motor to generate a flow of air containing oil and capture the oil. An impeller that collects, a fan casing that includes the impeller and has a suction port that sucks in air containing oil by rotation of the impeller, and a cleaning mechanism that has an injection unit that injects cleaning liquid and cleans the impeller The spray hood has an injection port for injecting the cleaning liquid and a diffusion plate for diffusing the cleaning liquid injected from the injection port, and the range hood that injects the cleaning liquid from the suction port side toward the inside of the fan casing Is provided.
According to this, by having the injection port for injecting the cleaning liquid and the diffusion plate for diffusing the cleaning liquid, the cleaning liquid is sprayed over the range where the oil component easily adheres even with a water supply pump having a lower water pressure than the conventional one to remove the dirt In addition, an inexpensive range hood can be provided.

Further, the diffusion plate may be disposed in the vicinity of the blade of the impeller, and may be provided so that the cleaning liquid sprayed from the spray port collides with the inside of the blade.
According to this, the cleaning liquid is sprayed from the suction port side toward the inside of the fan casing and collides with the inner side of the impeller blade, so that the cleaning liquid passes through the inner surface of the impeller, and the dirt is removed. can do.

Further, the diffusion plate has a diffusion surface for receiving and diffusing the cleaning liquid sprayed from the ejection port, and the virtual surface including the diffusion surface includes at least a part of an edge of the blade on the rotating shaft side of the motor. It is good.
According to this, since the virtual surface is provided so as to include the edge of the impeller blade on the rotating shaft side, the diffusing cleaning liquid can collide with the entire surface of the blade. Moreover, since the virtual surface is provided so as to include a part of the edge on the rotating shaft side of the blade, the planar cleaning liquid collides with the edge on the rotating shaft side at one point, so that the cleaning liquid is prevented from scattering. Can do.

Further, the impeller has a flat grease filter having a surface substantially perpendicular to the rotation axis of the motor, and the diffusion surface is a surface substantially perpendicular to the grease filter, or in the rotation direction of the impeller. The surface may be characterized in that the surface is inclined to the downstream side from the surface substantially perpendicular to the grease filter.
According to this, the diffusing surface is a surface that is substantially perpendicular to the grease filter, or the surface that is inclined to the downstream side from the surface that is substantially perpendicular to the grease filter in the rotation direction of the impeller, so that the cleaning liquid is scattered. To prevent that.

Furthermore, the diffuser plate has a base surface having a surface including substantially the same direction as the direction in which the injection port injects the cleaning liquid on the base side of the diffusion surface, and there is no step between the base surface and the peripheral portion of the injection port. May be a feature.
According to this, the base surface is substantially the same as the direction in which the cleaning liquid is ejected, and since there is no step with the peripheral edge of the ejection port, the cleaning liquid does not hit the diffusion plate and scatter.

Further, the diffusion plate may have a bent portion between the diffusion surface and the base surface.
According to this, the diffusion direction of the cleaning liquid can be controlled by including the bent portion.

Furthermore, the diffusion plate is disposed on the blade side from the intermediate position between the rotation shaft of the motor and the blade of the impeller, and the distance from the injection port to the first end portion on the rotation shaft side of the motor at the tip of the diffusion plate is It may be longer than the distance from the injection port to the second end on the blade side at the tip of the diffuser plate.
According to this, smooth suction can be ensured by providing the diffusion plate at a position that does not interfere with suction, and the cleaning liquid is diffused also in the vicinity of the rotating shaft of the fan, so that uniform cleaning can be performed.

Further, the ejection port is disposed on the blade side with respect to the intermediate position between the rotation shaft of the motor and the blade of the impeller, and the direction in which the ejection port ejects the cleaning liquid is substantially parallel to the rotation shaft or inclined toward the rotation shaft. This may be a feature.
According to this, smooth suction can be ensured by providing the diffusion plate at a position that does not interfere with suction, and the cleaning liquid is easily diffused near the rotation axis of the fan.

  As described above, according to the present invention, it is possible to provide a range hood that ejects cleaning liquid over a range in which oil components easily adhere even with a water supply pump having a lower water pressure than before and removes dirt.

BRIEF DESCRIPTION OF THE DRAWINGS (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. BRIEF DESCRIPTION OF THE DRAWINGS (A) The perspective view seen from the upper right of the 1st Example of the range hood which concerns on this invention, (B) The perspective view seen from the lower right. The expansion | deployment perspective view seen from the lower right of the 1st Example of the cooker hood which concerns on this invention. Explanatory drawing explaining the washing | cleaning mechanism of the 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 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 (state which removed the bell mouth). Sectional drawing in the BB cross section shown in FIG. 1 of the 1st Example of the range hood which concerns on this invention (The state which removed the bell mouth and the washing | cleaning mechanism). 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 in which the damper opened). Sectional drawing in the DD cross section shown in FIG. 1 of the 1st Example of the range hood which concerns on this invention (state in which the damper was closed). BRIEF DESCRIPTION OF THE DRAWINGS (A) Front view, (B) Top view, (C) Bottom view, (D) Left side view, (E) Right side view of a bell mouth in the first embodiment of the range hood according to 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 lid is open), (F) Perspective view seen from upper right (when lid is closed). The (A) expanded sectional view of the DD section shown in Drawing 1 of the first example of the range hood concerning the present invention, and the expanded sectional view of the dotted line part in (B) (A). (A) front view, (B) top view, (C) bottom view, (D) left side view, (E) right side view, (F) of the injection section in the first embodiment of the range hood according to the present invention. 1) a perspective view as viewed from the upper right side, (G) a perspective view as viewed from the upper right side, and (H) a perspective view as viewed from the lower right side. BRIEF DESCRIPTION OF THE DRAWINGS (A) Front view, (B) Right view, (C) Low perspective view from upper right for demonstrating injection of the washing | cleaning liquid of the injection part in 1st Example of the range hood which concerns on this invention. The expansion perspective view at the time of seeing the direction of a wing | blade from the direction of a rotating shaft of the injection part in the 1st Example of the range hood which concerns on this invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
<First Example>
With reference to FIG. 1 thru | or FIG. 15, the range hood 1 which concerns on a present Example is demonstrated. The range hood 1 includes a thin hood portion 2 having a concave inner panel 4 on the inner surface for collecting steam, oily smoke, and the like generated by cooking performed below. The hood portion 2 is connected to the blower box 3 connected to the exhaust duct DU in the vicinity of the communication port 6 located slightly to the right of the back surface. Moreover, the hood part 2 is equipped with the baffle plate 5 below, raises the wind speed around the hood part 2, and makes it easy to capture the oil smoke etc. which stand up from the downward direction. On the front side of the hood section 2, a switch 610 is provided that is operated by the user to instruct the air volume during exhaust or to instruct to perform cleaning. Further, a shutter SH for preventing the backflow of air is provided in the vicinity of the exhaust duct DU.

  The blower box 3 includes an introduction part 7 for introducing an air flow AR including oil smoke captured by the hood part 2 into the blower box 3 through the communication port 6, and an air containing oil from the introduction part 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 for rotationally driving the impeller 100, and an impeller 100. The blower box 3 for exhausting the grease filter 120, the cleaning mechanism 400 that cleans the blades 110 of the impeller 100 and the grease filter 120, and the air purified by removing oil from the fan casing 200 to the exhaust duct DU. On the air flow path from the impeller 100 to the exhaust port 500, which is an opening opened in With 00, the rotation of the impeller 100, the opening and closing of the damper 300, and operation controller 600 for controlling the cleaning mechanism 400, a.

  Note that the blower box 3 is provided slightly to the right in front view with respect to the hood portion 2. 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 slightly to the left in front view with respect to the hood part 2. As described above, since the exhaust port 500 is located on the side surface of the blower box 3, the effective height of the range hood 1 including the routing space of 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.

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

  The impeller 100 is a so-called sirocco fan having a plurality of blades 110 while holding a gap 115 between the blades 110 on a cylindrical side surface portion thereof. In this embodiment, as will be described later, since the cleaning liquid collides with the inner surface 111 (the surface on the rotating shaft side) of the blade 110, the blade 110 is viewed when one blade 110 is viewed from the rotating shaft 131. It is preferable that the inner surface of one of the blades 110 is not hidden by the other blade 110 or its outer surface 114 (the surface opposite to the surface on the rotating shaft side). That is, when viewed from the rotating shaft 131, the edge 113 (outer edge) of a certain blade 110 on the fan casing 200 side is hidden by the rotating shaft side edge 112 (inner edge) of the adjacent blade 110. There is nothing. The fan (blower) used in the present invention is preferably an impeller 100 which is a centrifugal blower as in the present embodiment, but is not limited to this and may be an axial blower.

  As shown in FIG. 5, the rotating shaft 131 of the motor 130 is installed so as to be substantially horizontal. Therefore, the line connecting the base portion 132 and the tip 133 of the rotating shaft 131 is substantially horizontal, and the impeller 100. The axis of rotation is also almost horizontal. The motor 130 rotates the impeller 100 at a high speed during exhaust operation, which is a normal operation, and rotates the impeller 100 at a relatively low speed during cleaning. The motor 130 and the impeller 100 are coupled via a rotational force 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. A boss groove 136 for receiving the rotational force of the motor 130 by fitting a motor pin 135 provided on the rotary shaft 131 is provided on the center rear surface side of the motor 130 so that the rotational driving force of the motor 130 is supplied to the impeller 100. Communicate reliably.

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

  The grease filter 120 has a hole that allows air to pass through a flat disk. When the air passes through the hole by rotating together with the impeller 100, the oil collides with and adheres to a meat part other than the hole. Remove the oil contained in. In the present embodiment, the grease filter 120 is a flat disk, but is not limited thereto, and may be curved in a dish shape, and a cross section including the rotation shaft 131 of the motor 130 spreads to the front side. It may be a trapezoidal grease filter.

  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, 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 oil contained in the air flow AR is provided on the cylindrical side surface portion of the impeller 100. It collides with and adheres to the grease filter 120 provided inside the cylinder of the impeller 100 or impeller 100. Thereby, the oil is removed from the air containing the oil, and the air from which the oil has been removed passes through the outside of the impeller 100 inside the fan casing 200, and when the damper 300 is in the open state, the fan casing 200. Are exhausted to the outside 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 200 </ b> Z 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 the 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, more preferably 15 degrees or more with the horizontal line. By doing in this way, the oil and cleaning liquid adhering 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 a 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 the diagonally upper left direction as in the air flow AR shown in the figure. It moves toward the mouth 500 and is exhausted. Thus, the exhaust port 500 is an opening opened on the side surface of the blower box 3 that communicates with the fan casing 200 and exhausts the purified air into the exhaust duct DU. Thereby, the effective height of the range hood 1 including the routing space of 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 inside the fan casing 200, and is on the air flow path from the impeller 100 to the exhaust port 500 located on the side (left lateral direction) of the fan casing 200. Thus, it is provided in the vicinity of the exhaust port 500. The damper 300 has a rotating shaft 311, and opens and closes the air flow path by rotating around the rotating shaft 311. Although the damper may open and close the air flow path by a slide type or the like, since the damper 300 has the rotation shaft 311, the hole opened in the fan casing 200 becomes a minimum size, and the washing water is outside the fan casing 200. It becomes difficult to leak. Further, since the hole opened in the fan casing 200 is small, the air tightness of the fan casing 200 is improved, and the exhaust can be efficiently performed when the fan is driven.

  The damper 300 shown in FIG. 9 is in a state mainly during exhaust operation, and is in a state in which air from which oil has been removed from the inside of the fan casing 200 is exhausted to the exhaust port 500. Therefore, the flow path to the exhaust port 500 is opened. Is in an open state. The rotation shaft 311 of the damper 300 is located on the side that is biased toward the one end 310, and the one end 310 is the other end 320 when the damper 300 is in the open state (the other end of the damper 300 that faces the one end 310 with the rotation shaft 311. The position 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 rotation shaft is located higher than the other end, so that the amount of oil that has adhered to the damper flows to the rotation shaft can be reduced, and the oil adheres to the rotation shaft 311 and rotates. It is possible to prevent the occurrence of troubles such as being impossible. In this embodiment, the rotating shaft 311 of the damper 300 is located at the one end 310, but may be located on the side deviated from the center of the damper 300 in the flow path direction toward the one end 310.

  The damper 300 in the open state is housed in a damper accommodating portion 330 that forms a recess inside the fan casing 200, and is configured so as not to resist 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 by the surface, it may be fixed by oil, but by contacting only at 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 a failure that cannot be closed.

  As shown in FIG. 11, the bell mouth 211 is configured to be detachable from the fan casing 200 so as to be easily cleaned. The bottom view of this figure (C) becomes the front side when the bell mouth 211 is attached to the fan casing 200, and the top view of this figure (B) becomes the back side facing the impeller 100. On the back side of the bell mouth 211, a part of a water supply pipe 450 constituting a cleaning mechanism 400 described later and an injection unit 460 or a water supply unit 460 connected to the tip of the water supply pipe 450 are provided. When attached to the fan casing 200, it is configured to be connected to the water supply pipe 450 on the main body side. When the bell mouth 211 is attached to the fan casing 200, most of the injection unit 460 / water supply unit 460 is provided to be hidden by the bell mouth cover unit 212 in a front view, so that the injection unit 460 / water supply unit 460 is provided. Is less exposed to air containing oil and it is difficult for oil to adhere.

  The cleaning mechanism 400 is a mechanism for cleaning the blades 110 and the grease filter 120 of the impeller 100, as mainly shown in FIG. The cleaning mechanism 400 cleans the blades 110 of the impeller 100 because the oil filter is captured by the blades 110 of the impeller 100 when the grease filter 120 is not provided inside the impeller 100. The cleaning mechanism 400 includes a tank 410 that is stored in a tank storage unit 412 that is located near the rear side of the bottom surface of the hood unit 2, a water supply unit 460 that supplies the cleaning liquid to the inside of the fan casing 200, and a tank 410. A water supply pipe 450 that supplies the cleaning liquid from the water supply section 460 to the water supply section 460, a pump 420 that is disposed between the water supply section 460 and the tank 410 and sucks the cleaning liquid from the tank 410, and a water supply pipe 450 between the tank 410 and the water supply section 460. A foreign matter removing filter 440 that removes foreign matter mixed in the cleaning liquid and a recovery unit 430 that supplies water to the tank 410 after the water supply unit 460 supplies water and cleans the impeller 100 and the like are provided.

  The tank 410 is a cubic box in which the cleaning liquid can be stored, as mainly shown in FIGS. Protrusions are appropriately formed so that they can be stored in the tank storage part 412, and the tanks 410 are stored in the tank storage part 412 by engaging these protrusions with the recesses of the tank storage part 412. The tank storage unit 412 is provided slightly on the back side of the bottom surface of the hood unit 2 and a lid 413 of the tank storage unit 412 is provided.

  The tank 410 is connected to a tank lid 411 that opens when pressed and closes when pressure is removed, a purification filter portion 416 below the tank lid 411, and a position that coincides with the tip of the water supply pipe 450 when stored. And a hole 415. Since the hole diameter of the connection hole 415 is small and the tank lid 411 in the removed state is closed, the cleaning liquid contained therein can be prevented from spilling when the user carries the tank 410. The upper surface of the tank 410 is configured to be detachable from the main body of the tank 410 and can be removed to clean the inside. Further, the purification filter unit 416 removes and purifies oil 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 up the cleaning liquid from the tank 410 to the water supply unit 460 that is located on the front side that 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 disposed on the back side (the impeller 100 side) of the bell mouth 211.

  The pump 420 has an output for moving 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 water pressure for allowing the cleaning liquid to be injected vigorously. Have However, even in that case, the injection unit 460 has a hole having an inner diameter similar to the inner diameter of the water supply pipe 450 and injects from the hole. Therefore, the output is larger than that from a small hole. Do not need. Moreover, it is preferable that the pump 420 can perform not only forward rotation that moves the cleaning liquid in the direction from the tank 410 to the water supply unit 460 but also reverse rotation that moves 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, but when the cleaning liquid collides with the blades 110 and the grease filter 120 and cleans, 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 therefore will be described as the injection unit 460 below.

  The injection unit 460 is configured to inject the cleaning liquid over a wide range inside the fan casing 200 toward the blades 110 and the grease filter 120 of the impeller 100. This configuration will be described later. 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 and the blades 110 to which oil easily adheres. The injection unit 460 is preferably in the vicinity of the peripheral edge of the suction port 210, that is, in the vicinity of the blades 110 inside the impeller 100, and the closer the injection unit 460 is, the better as long as it is not in contact. Thereby, the cleaning liquid ejected from the ejection unit 460 strongly collides with the blade 110. In addition, if the injection unit 460 is in the central portion of the impeller 100, the injection unit 460 may become an obstacle during the exhaust operation, and the performance of sucking air containing oil may be reduced. Such a problem does not occur by providing in the vicinity of the portion.

  The injection unit 460 is provided below the tip 133 of the rotating 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 higher position than the rotation shaft 131 during rotation, and the cleaning liquid is sucked by rebounding after the collision. It will fly over the mouth 210. Therefore, with this configuration, it is possible to prevent the sprayed cleaning liquid from splashing from the suction port 210 and the cleaning liquid from dripping from the spray unit 460.

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

  The inner diameter of the inlet 210 of the fan casing 200 is smaller than the inner diameter of the impeller 100, as mainly shown in FIGS. As a result, 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 exists on the front side of the injection unit 460, it is possible to prevent the cleaning liquid from splashing beyond the suction port 210 and to face the inside of the impeller 100 where dirt easily adheres. Since the cleaning liquid can be directly sprayed, cleaning can be performed effectively. 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 rotating shaft 131 and the opening) to the periphery. The inner diameter of the bell mouth 211 in this embodiment is the center of the opening. The distance from the center of the bell mouth cover 212 to the most central portion may be used. 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 used) is the inner diameter of the impeller 100. It only needs to be smaller.

  Moreover, 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 illustrated in FIG. According to this, since the cleaning liquid collided with the blade 110 of the impeller 100 smoothly flows to the downstream side in the rotation direction by injecting the cleaning liquid from the injection unit 460 to the downstream side 100ZD, the collided cleaning liquid scatters. This can be further prevented.

  As shown mainly in FIGS. 4, 12, and 13, the collecting unit 430 includes a bottom 214 of the fan casing 200 that receives the cleaning liquid after the spraying unit 460 sprays and cleans the blades 110 and the grease filter 120. The fan casing cleaning liquid discharge port 213 provided at the bottom 214 of the casing 200 and slightly closer to the tank 410 than the lowest point 200Z of the fan casing 200 and the fan casing cleaning liquid discharge port 213 coincide with each other. 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 shifted from the lowest point 200Z of the fan casing 200 toward the tank 410, that is, shifted from the lowest point 200Z to the downstream side in the rotation direction 100DR. As a result, even if the cleaning liquid moves up the bottom portion 214 of the fan casing 200 toward the exhaust port 500 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 in a diagonally downward direction 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 disposed at a position corresponding to the tank lid 411 of the tank 410. In addition, by extending the drain pipe 431 in an obliquely downward direction, the tank 410 can be shifted laterally from the lowest point 200Z of the fan casing 200, and thereby the overall height of the range hood 1 can be relatively increased. 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, and receives the dirty cleaning liquid flowing from the drain pipe 431 into the tank 410. open. The dirty cleaning liquid is filtered by the purification filter unit 416, and the purified cleaning liquid returns to the tank 410.

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

  In addition, when the cleaning liquid is moved from the injection unit 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 is removed when the forward cleaning liquid is flowing. Since the foreign matter adhering to the removal filter 440 can be peeled off, it is possible to prevent the foreign matter from remaining attached to the foreign matter removal filter 440 and causing clogging.

  In particular, the foreign matter removal filter 440 is preferably provided between the tank 410 and the pump 420. As a result, foreign matter can be prevented from entering 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, upstream of the pump in the forward direction of the cleaning liquid, thereby preventing foreign matter from entering the pump 420. .

  Note that 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, so that the cleaning liquid may leak. Is configured to not. Conversely, 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 impeller 100 by controlling the rotation of the motor 130, controls the opening and closing of the damper 300 by controlling the rotation of the damper motor (not shown), and controls the operation of the pump 420. By controlling the operation of the cleaning mechanism 400, the motor 130, the damper motor, the pump 420, and the like are controlled based on the input of the switch 610. Although the control part 600 is comprised from the control program incorporated in the microcomputer and is provided in the air blower box 3 in a present Example, it is not specifically limited, You may provide in the hood part 2. FIG.

  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 a cooking device. Alternatively, predetermined rotation control may be performed automatically by detecting the oil contained in the air. Further, the control unit 600 may have a predetermined cleaning process for controlling the operation of the cleaning mechanism 400. 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.

  With reference to FIG. 14 thru | or FIG. 16, the injection part 460 of the range hood 1 which concerns on this invention is demonstrated. In the present embodiment, when the rotation direction 100DR of the impeller 100 is a right rotation in the front view, the injection unit 460 is arranged in the lower right quadrant 100ZU as shown in FIG. Near the blade 110 (in the vicinity of the blade 110 inside the impeller 100). The injection unit 460 is configured to inject the cleaning liquid from this position over a wide range from the suction port 210 side toward the blades 110 and the grease filter 120 of the impeller 100.

  The ejection unit 460 includes an ejection port 461 that actually ejects the cleaning liquid and a diffusion plate 463 that diffuses the cleaning liquid ejected from the ejection port 461. The nozzle 461 is different from the nozzle having a large number of small injection holes as in the prior art, and is one large hole compared to the conventional small injection holes, and is a water supply pipe that supplies cleaning liquid. The hole has the same inner diameter as 450. Thereby, since it is not necessary to apply a large water pressure to the ejection, the cleaning liquid can be ejected even by the pump 420 having a smaller water pressure than the conventional one.

  Of course, the number of the injection ports 461 is not limited to one, but it is not preferable to subdivide them so much. Even when subdividing, it is preferable that the flow rate cross section of the entire injection port 461 is not smaller than the flow rate cross section of the water supply pipe 450. Moreover, it is preferable that the injection direction of the injection port 461 does not change the direction in which the cleaning liquid flows from the water supply pipe 450, and the injection port 461 is provided at a position corresponding to the end surface of the water supply pipe 450 as in this embodiment. It is preferred that Accordingly, the cleaning liquid can be ejected even by the pump 420 having a smaller water pressure.

  On the other hand, with such an injection port 461 alone, the cleaning liquid is sprayed over a wide range from the vicinity of the blade 110 toward the blade 110 on the cylindrical side surface of the impeller 100 and the grease filter 120 at the center of the cylinder. difficult. The diffusion plate 463 diffuses the cleaning liquid ejected from the ejection port 461, thereby enabling the cleaning liquid to be ejected over a wide range. As described above, the injection unit 460 includes the injection port 461 for injecting the cleaning liquid and the diffusion plate 463 for diffusing the cleaning liquid. The range hood 1 can be provided by spraying, removing dirt, and inexpensive.

  The diffusion plate 463 is disposed in the vicinity of the blade 110 of the impeller 100 and is provided so that the cleaning liquid sprayed from the spray port 461 collides with the surface of the inner side 111 of the blade 110. The vicinity of the blade 110 refers to the blade 110 side with respect to the intermediate position between the rotating shaft 131 of the motor 130 and the blade 110, but the closer to the blade 110, the better if the blade side edge 463 EH of the diffusion plate 463 does not contact the blade 110. . According to this, the cleaning liquid is sprayed from the suction port 210 side and collides with the inner side 111 of the blade 110 of the impeller 100, so that the curved surface inside the inner side 111 of the blade 110 to which dirt adheres receives the cleaning liquid. In addition, the cleaning liquid is not only on the front side (front side) where the cleaning liquid directly collides with the inner surface 111 of the blade 110 but also on the inner surface 111 of the blade 110 on the rear side (rear side) of the grease filter 120. By passing, dirt can be removed over the entire surface of the inside 111 of the blade 110.

  Further, the diffusion plate 463 is formed eccentric from the center position of the injection port 461. That is, the distance from the injection port 461 to the blade side edge 463EH of the diffusion plate 463 is shorter than the distance from the injection port 461 to the rotation axis side edge 463EC of the diffusion plate 463. Similarly, the distance L1 from the ejection port 461 to the first end 468 on the rotating shaft 131 side of the motor 130 at the front end 467 of the diffusion plate 433 is the blade 110 side of the front end 467 of the diffusion plate 433. Longer than the distance L2 to the second end 469. By doing so, the piping of the water supply pipe 450 can be kept as close to the blade 110 as possible, and by providing the diffusion plate 463 at a position that does not interfere with the suction, smooth suction can be secured and the rotating shaft 131 can be secured. Since the diffusion plate 463 is provided so as to approach, the cleaning liquid is diffused also in the vicinity of the rotating shaft of the impeller 100 and can be uniformly cleaned over a wide range.

  More specifically, the diffusion plate 463 has a diffusion surface 464 that receives and diffuses the cleaning liquid ejected from the ejection port 461. As shown in FIG. 15, the cleaning liquid injected from the injection port 461 proceeds in the axial direction of the water supply pipe 450 in the vicinity of the injection port 461 (the WW1 direction that is perpendicular to the end surface of the water supply pipe 450) immediately after being injected. . However, the cleaning liquid sprayed in the axial direction from the injection port 461 is received by the collision area CA of the diffusion surface 464, and in other words, along the diffusion surface 464, the cleaning liquid is parallel to the diffusion surface 464 (WW direction). You can change your course. Then, the cleaning liquid whose course has been changed in the direction parallel to the diffusion surface 464 (WW direction) diffuses beyond the range of the diffusion surface 464 so as to further spread from the collision area CA (WW direction). Thus, the cleaning liquid diffused beyond the range of the diffusion surface 464 proceeds along the virtual surface VA including the diffusion surface 464 and extending around.

  Further, the diffusion plate 463 has a base surface 465 having a surface including substantially the same direction as the direction WW1 in which the injection port 461 ejects the cleaning liquid on the base side (water supply pipe 450 side) of the diffusion surface 464, and the base surface 465. The peripheral edge 462 of the injection port 461 preferably has no step. The absence of a step means that the cylindrical bus forming the injection port 461 including the peripheral edge 462 is included in the surface of the base surface 465. For example, as shown by the rightmost arrow in the direction WW1 in which the cleaning liquid is injected in FIG. 15B, the surface 4551 and the surface of the base surface 465 coincide with each other. In this way, the base surface 465 is substantially the same direction as the direction WW1 in which the cleaning liquid is ejected, and since there is no step with the peripheral edge portion 462 of the ejection port 461, the cleaning liquid flows from the base surface 465 so as to slide on the diffusion surface 464. Therefore, it does not scatter by hitting the diffusion plate 463. In addition, the diffusion plate 463 may have a bent portion 466 between the diffusion surface 464 and the base surface 465. By having the bent portion 466 that can change the direction WW1 in which the cleaning liquid is sprayed and the direction WW in which the cleaning liquid actually diffuses, the diffusion direction of the cleaning liquid can be controlled.

  The cleaning liquid ejected by the ejection port 461 in the WW1 direction collides with the collision area CA of the diffusion surface 464, and then spreads on both sides in the direction of the blade side edge 463EH and the rotation axis side edge 463EC of the diffusion plate 463, at least on the rotation axis 131 side. Then, the water pressure of the pump 420 is adjusted so as to expand to the first end 468. The cleaning liquid spreads from the blade side edge 463EH to the rotating shaft side edge 463EC including the tip portion 467. When the cleaning liquid diffuses beyond the diffusion surface 464, the cleaning liquid diffuses in the surface direction of the virtual surface VA including the diffusion surface 464. Go. The cleaning liquid diffused along the virtual plane VA is centered on the grease filter 120 in the direction extending from the inner surface 111 of the blade 110 near the blade side edge 463EH to the first end 468 from the injection port 461. To a wide range.

  The virtual surface VA including the diffusing surface 464 may be provided so as to include the edge 112 on the rotating shaft 131 side of the motor 130 in the blade 110. Thereby, the diffusing cleaning liquid can collide with the entire surface of the inner side 111 of the blade 110. Further, the virtual surface VA including the diffusing surface 464 may be provided so as to include a part of the edge 112 on the rotating shaft 131 side of the motor 130 in the blade 110, as shown in FIG. As described above, if the virtual surface VA does not include the entire edge 112 on the rotating shaft 131 side but is slightly inclined with respect to the edge 112 and includes a part of the edge 112, the surface shape along the virtual surface VA Since the cleaning liquid collides at one point with the edge 112 at the closest position in the process in which the edge 112 moves toward the rotation direction 100DR of the impeller 100, the cleaning liquid can be prevented from being scattered. The virtual surface VA including the diffusion surface 464 is preferably provided such that the virtual surface VA on the side away from the rotation shaft 131 including the diffusion surface 464 intersects with only one blade 110. According to this, the cleaning liquid can collide with the entire surface of the inner side 111 of each blade 110, and dirt can be removed.

  The virtual surface VA including the diffusion surface 464 may be provided so as to include the vicinity of the edge 113 on the fan casing 200 side of the blade 110. Accordingly, since the blade 110 moves, the cleaning liquid is jetted from the vicinity of the edge 113 on the fan casing 200 side of the blade over the edge 112 on the motor rotating shaft 131 side. Can do. The vicinity of the edge 113 on the fan casing 200 side refers to the fan casing 200 side with respect to the intermediate position between the edge 113 on the fan casing 200 side of the blade 110 and the edge on the rotating shaft 131 side of the motor. The closer it is to the better. Further, when the virtual surface VA including the diffusion surface 464 is provided in the vicinity of the edge 113 on the fan casing 200 side of the blade 110 and does not include the edge 113 on the fan casing 200 side, the edge on the fan casing 200 side is provided. Although no cleaning liquid is sprayed on 113, the cleaning liquid flows to the edge 113 on the fan casing 200 side by centrifugal force. Thereby, it can be made to collide with the whole surface of the inner side 111 of the blade | wing 110. FIG.

  When the impeller 100 has a flat grease filter 120 having a surface substantially perpendicular to the rotation shaft 131 of the motor 130 inside, the diffusion surface 464 is a surface substantially perpendicular to the grease filter 120 or the impeller. In the rotation direction 100DR of 100, the surface may be inclined to the downstream side from the surface substantially perpendicular to the grease filter 120. Thereby, since the cleaning liquid does not collide in a direction opposite to the direction in which the surface of the grease filter 120 rotates, the cleaning liquid is prevented from scattering.

  In the present embodiment, the direction WW1 in which the ejection port 461 ejects the cleaning liquid is substantially parallel to the rotation shaft 131, but may be inclined toward the rotation shaft 131. As a result, the injection unit 460 is disposed in the vicinity of the blade 110, and by providing the diffusion plate 463 at a position that does not interfere with the suction, smooth suction can be ensured and the entire rotation shaft 131 of the impeller 100 can be secured. Since the cleaning liquid is diffused, the cleaning liquid is easily diffused also in the vicinity of the rotating shaft 131 of the impeller 100.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible. That is, although the present invention has been particularly illustrated and described with respect to particular embodiments, it should be understood that the present invention has been described in terms of quantity, quantity, and amount without departing from the scope and spirit of the present invention. Various modifications can be made by those skilled in the art in application examples and other detailed configurations.

DESCRIPTION OF SYMBOLS 1 Range hood 2 Hood part 3 Blower box 4 Inner panel 5 Current plate 6 Communication port 7 Introduction part 100 Impeller (fan)
110 Blade 111 Inside of blade 112 Edge of blade on rotating shaft 113 Edge of blade on fan casing side 114 Outside of blade 115 Air 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 Portion 213 Fan Casing Cleaning Fluid Drain 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 cover 412 Tank storage part 413 Tank storage part cover 414 Liquid suction port 415 Connection hole 416 Purification filter part 417 Projection part 420 Pump 430 Collection part 431 Drainage Water pipe 440 Foreign matter removal filter 450 Water supply pipe (flow path of cleaning liquid between tank and injection section)
460 Injection unit (water supply unit)
461 Injection port 462 Peripheral portion of injection port 463 Diffusion plate 464 Diffusion surface 465 Base surface 466 Bending portion 467 Tip portion 468 First end portion 469 Second end portion 500 Exhaust port 600 Control unit 610 Switch 100Z Lower point 100ZU of impeller Quadrature upstream of the lowest point of the impeller 100DR Rotating direction of the impeller 200Z Bottom point of the fan casing 463EH Blade side edge of the diffuser plate 463EC Rotary shaft side edge of the diffuser plate 500Z Bottom point of the exhaust port DU Exhaust duct SH Shutter AR Air flow WW Cleaning fluid path CA Collision area VA Virtual plane

Claims (8)

A range hood that sucks air containing oil generated by cooking and collects oil,
An impeller that is rotationally driven by a motor to generate a flow of air containing oil, and that collects oil;
A fan casing including the impeller therein and having a suction port for sucking in air containing the oil by rotation of the impeller;
A cleaning mechanism for spraying the cleaning liquid and cleaning the impeller;
With
The spray unit has a spray port for spraying the cleaning liquid and a diffusion plate for diffusing the cleaning liquid sprayed from the spray port, and sprays the cleaning liquid from the suction port side toward the inside of the fan casing.
Range food.   2. The range hood according to claim 1, wherein the diffusion plate is disposed in the vicinity of a blade of the impeller and is provided so as to cause the cleaning liquid sprayed from the spray port to collide with the inside of the blade. The diffusion plate has a diffusion surface that receives and diffuses the cleaning liquid sprayed from the spray port,
The range hood according to claim 1, wherein the imaginary surface including the diffusing surface includes at least a part of an edge of the blade on the rotating shaft side of the motor. The impeller has a flat grease filter inside having a surface substantially perpendicular to the rotation axis of the motor,
The diffusion surface is a surface that is substantially perpendicular to the grease filter, or a surface that is inclined to a downstream side from a surface that is substantially perpendicular to the grease filter in a rotation direction of the impeller. Item 4. The range hood according to item 3. The diffusion plate has, on the base side of the diffusion surface, a base surface having a surface that includes substantially the same direction as the direction in which the injection port ejects the cleaning liquid,
The range hood according to claim 3 or 4, wherein there is no step between the base surface and the peripheral edge of the injection port.   The range hood according to claim 5, wherein the diffusion plate has a bent portion between the diffusion surface and the base surface. The diffusion plate is disposed on the blade side with respect to the intermediate position between the rotating shaft of the motor and the blade of the impeller,
The distance from the injection port to the first end portion on the rotating shaft side of the motor at the front end portion of the diffusion plate is from the distance from the injection port to the second end portion on the blade side at the front end portion of the diffusion plate. The range hood according to any one of claims 1 to 6, wherein the range hood is long. The injection port is disposed on the blade side of an intermediate position between the rotation shaft of the motor and the blade of the impeller,
The range hood according to any one of claims 1 to 7, wherein a direction in which the ejection port ejects the cleaning liquid is substantially parallel to the rotation shaft or inclined toward the rotation shaft.