JP2017187203A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood that uses washing water while circulating the washing water and prevents cleaning fluid from dropping even when a cleaning liquid tank is removed after completion of cleaning.SOLUTION: The range hood includes a control part that has a predetermined cleaning process for controlling operation of a fan and a cleaning mechanism and, in the cleaning process, makes a pump turn reverse after forward rotation in order to supply cleaning fluid to a water supply part from a tank in the last step.SELECTED DRAWING: Figure 14

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 with a circulation type cleaning function is known in which a cleaning liquid is sprayed and cleaned, and the cleaned cleaning liquid is recovered and reused.

  For example, Patent Document 1 forms an unevenness for capturing oil in oil smoke on the inner surface of a fan casing of a blower, efficiently captures oil, and supplies a cleaning liquid to the unevenness from a cleaning liquid tank via a water supply pipe. Disclosed is a range hood for cleaning oil adhering to unevenness. This range hood has a drain pipe connected to the lowermost part of the fan casing, and the cleaning liquid after cleaning is collected in the cleaning liquid tank through the drain pipe, and again because the cleaning liquid is sucked up from the suction part of the water supply pipe and reused. It can be cleaned with a cleaning solution and is environmentally friendly.

JP 2000-146242 A

However, such a range hood has a problem that if the cleaning liquid tank is removed after the cleaning is finished, the cleaning liquid remaining in the water supply pipe flows backward and drops from the suction portion, and the cooker or the like below the range hood is soiled. was there.
Therefore, the present invention provides a range hood in which cleaning water is circulated and used so that the cleaning liquid does not drip even if the cleaning liquid tank is removed after the cleaning is completed.

In order to solve the above problem, a range hood that sucks air containing oil generated by cooking and collects oil, a fan that generates a flow of air containing oil, and a fan casing that includes a fan inside A cleaning mechanism for cleaning the fan, and a control unit for controlling the operation of the fan and the cleaning mechanism. The cleaning mechanism includes a tank for storing the cleaning liquid, a water supply section for supplying the cleaning liquid to the inside of the fan casing, and the tank. And a pump that sucks the cleaning liquid from the tank and a recovery unit that supplies the water to the tank and collects the cleaning liquid after the fan is cleaned, and the control unit operates the fan and the cleaning mechanism. A predetermined cleaning process to be controlled, and in the cleaning process, after the pump is finally forward rotated in order to supply the cleaning liquid from the tank to the water supply unit, De is provided.
According to this, since the cleaning liquid remaining between the tank and the water supply unit can be returned to the tank by rotating the pump in the reverse direction, a range hood that does not drip the cleaning liquid even after the cleaning liquid tank is removed is provided can do. Further, since the cleaning liquid remaining between the tank and the water supply unit is discharged, it is possible to prevent the sticking of the chalk and the generation of mold between the tank and the water supply unit.

Furthermore, one or more foreign matter removing filters for removing foreign matters mixed in the cleaning liquid may be provided in the flow path of the cleaning liquid between the tank and the water supply unit.
According to this, by providing the foreign substance removal filter in the flow path of the cleaning liquid between the tank and the water supply unit, that is, in the flow path where the cleaning liquid flows in the reverse direction when the pump rotates in the reverse direction, the forward cleaning liquid flows. In this case, the foreign matter adhering to the foreign matter removal filter can be peeled off, so that the foreign matter remains attached to the foreign matter removal filter and can be prevented from being clogged.

Furthermore, the foreign matter removal filter may be provided between the tank and the pump.
According to this, the foreign matter intrusion to the pump can be prevented by providing the foreign matter removal filter between the tank and the pump, that is, upstream of the pump in the forward direction of the cleaning liquid.

Further, in the cleaning process, the pump is continuously forward rotated while rotating the fan, the pump is continuously forward rotated, and then the pump is intermittently forward rotated while the fan is rotating. The method may further include forwardly rotating the pump continuously while rotating the fan after intermittently rotating the pump forward.
According to this, the oil component etc. which adhered to the fan can be dropped effectively.

Further, the cleaning process may include first rotating the fan without operating the cleaning mechanism.
According to this, by rotating the fan first, the adhered dirt is removed as much as possible by centrifugal force and then washed with the cleaning liquid, so that the dirt can be removed more effectively.

Further, the cleaning step may include rotating the fan without operating the cleaning mechanism.
According to this, since a fan etc. can be dried by rotating a fan last, it leads to lifetime improvement and a strange odor prevention.

  As described above, according to the present invention, in a range hood that circulates and uses cleaning water, it is possible to provide a range hood in which the cleaning liquid does not drip even if the cleaning liquid tank is removed after the cleaning is completed.

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). Explanatory drawing explaining the washing | cleaning process of the 1st Example of the cooker 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. 13, 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. 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. . Further, the foreign matter removal filter 440 may be provided in the liquid suction port 414 that sucks the cleaning liquid from the tank 410 that is included in the tank 410 and located at the tip of the drain pipe 450. Thereby, since it can prevent that a foreign material enters into a water supply pipe, a foreign material does not adhere to a water supply pipe.

  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. The control unit 600 may have a predetermined cleaning process for controlling the operations of the impeller 100 and 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.

  An example of the predetermined cleaning process is shown in FIG. In this cleaning process, it is assumed that the damper motor is rotated to start the cleaning and the damper 300 is closed.

    Cleaning step 1: After the damper 300 is closed, the control unit 600 first rotates the impeller 100 without operating the cleaning mechanism 400 as preliminary cleaning. According to this, by rotating the impeller 100 first, the adhered dirt is removed as much as possible by centrifugal force and then washed with the cleaning liquid. Therefore, the dirt can be more effectively removed in the following steps. The rotation speed is preferably high, for example, 300 rpm or more. With such a rotational speed, the adhered dirt can be removed as much as possible by centrifugal force.

    Cleaning step 2: The controller 600 stops the rotation of the impeller 100.

    Cleaning Step 3: The control unit 600 rotates the impeller 100 at a low speed and continuously rotates the pump 420 continuously to inject the cleaning liquid from the injection unit 460 to start the main cleaning. As the impeller 100 rotates at a low speed (for example, 80 to 100 rpm), the ejection unit 460 continuously ejects the cleaning liquid, so that the cleaning liquid uniformly collides with the inside of the blade 110 of the impeller 100 and the grease filter 120. Therefore, the oil component adhering to them can be softened.

    Cleaning Step 4: The control unit 600 rotates the impeller 100 at a low speed and intermittently forwards the pump 420 to intermittently inject the cleaning liquid from the injection unit 460. Intermittently means that the forward rotation and stop of the pump 420 are repeated at intervals of about twice per second. Since the injection unit 460 intermittently injects the cleaning liquid while the impeller 100 rotates at a low speed, the cleaning liquid collides with the inside of the blades 110 of the impeller 100 and the grease filter 120 with a strong impact. Can be peeled off.

    Cleaning Step 5: The control unit 600 rotates the impeller 100 at a low speed and continuously rotates the pump 420 to continuously inject the cleaning liquid from the injection unit 460 to perform rinsing. As described above, by performing the cleaning steps 4 to 6, oil or the like attached to the impeller 100 or the grease filter 120 can be effectively dropped.

    Cleaning Step 6: The control unit 600 stops the impeller 100 and the pump 420, and naturally drains the cleaning liquid remaining on the bottom 214 of the fan casing 200 from the fan casing cleaning liquid discharge port 213.

    Cleaning step 7: The control unit 600 reversely rotates the pump 420 in order to return the cleaning liquid remaining in the water supply pipe 450 between the injection unit 460 and the tank 410 to the tank 410. The time for rotating the pump 420 in the reverse direction is a sufficient time for returning the cleaning liquid remaining in the water supply pipe 450 between the injection unit 460 and the tank 410 to the tank 410. In this series of cleaning steps, the pump 420 was forwardly rotated last in the cleaning step 5, but the pump 420 is reversely rotated after the cleaning step 5 that was forwardly rotated last. According to this, since the cleaning liquid remaining between the tank 410 and the injection unit 460 can be returned to the tank 410, the cleaning liquid does not drip even if the cleaning liquid tank is removed after the cleaning is completed. In addition, since the cleaning liquid remaining between the tank 410 and the water supply / injection unit 460 is discharged, it is possible to prevent sticking of the chalk and generation of mold between the tank 410 and the water supply / injection unit 460. .

Cleaning step 8: The controller 600 rotates the damper motor to open the damper 300, and rotates the impeller 100. Thus, since the impeller 100 etc. can be dried by rotating the impeller 100 at the end of a washing | cleaning process, it leads to lifetime improvement and a strange odor prevention. In addition, it is preferable that a rotational speed is high speed, for example, 200 rpm or more. With such a rotational speed, water droplets remaining on the impeller 100 and the like can be dropped by centrifugal force.
Cleaning step 9: The controller 600 stops the rotation 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.

  For example, in the above-described embodiment, as a cleaning method, the spraying unit vigorously sprays the cleaning liquid toward the impeller blades and the grease filter, so that oil adhering to the blades and the grease filter is cleaned. Not limited. For example, the fan casing is configured to store the cleaning liquid inside, and the water supply unit supplies the cleaning liquid to the extent that the blades are immersed in the fan casing, and the impeller and grease filter are rotated with the blades immersed. Then, a method of cleaning the attached oil may be taken.

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)
500 Exhaust port 600 Control unit 610 Switch 100Z Lower point of impeller 100ZU Quadrant upstream of impeller lower point 100DR Direction of rotation of impeller 200Z Lower point of fan casing 500Z Lowest point of exhaust port DU Exhaust Duct SH Shutter AR Air flow

Claims (6)

A range hood that sucks air containing oil generated by cooking and collects oil,
A fan for generating a flow of air containing the oil;
A fan casing containing the fan therein;
A cleaning mechanism for cleaning the fan;
A controller for controlling the operation of the fan and the cleaning mechanism;
With
The cleaning mechanism is
A tank for storing cleaning liquid;
A pump that is disposed between the tank and a water supply unit that supplies cleaning liquid to the inside of the fan casing, and sucks up the cleaning liquid from the tank;
A collection unit for collecting the cleaning liquid after the water supply unit supplies water and cleaning the fan to the tank;
With
The control unit includes a predetermined cleaning process for controlling operations of the fan and the cleaning mechanism, and in the cleaning process, the pump is finally rotated forward to supply the cleaning liquid from the tank to the water supply unit. And then reverse
Range food.   The range hood according to claim 1, wherein at least one foreign matter removing filter for removing foreign matters mixed in the cleaning liquid is provided in a flow path of the cleaning liquid between the tank and the water supply unit.   The range hood according to claim 2, wherein the foreign matter removing filter is provided between the tank and the pump. The washing step includes
While the fan is rotating, the pump is continuously forward rotated,
After the pump is continuously forward rotated, the pump is intermittently forward rotated while the fan is rotating,
Intermittently forward rotating the pump, and then continuously rotating the pump forward while rotating the fan;
The range hood according to any one of claims 1 to 3, further comprising:   The range hood according to any one of claims 1 to 4, wherein the cleaning step includes first rotating the fan without operating the cleaning mechanism. The range hood according to any one of claims 1 to 5, wherein the cleaning step includes, finally, rotating the fan without operating the cleaning mechanism.