JP7340869B2 - Range food - Google Patents

Description

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

Conventionally, in range hoods that are installed near cooking appliances to suck in and collect oily smoke generated during cooking, the sucked oily smoke is collected by attaching it to a blower, etc., and the dirt containing the attached oil is removed using a nozzle. Range hoods that are cleaned by spraying cleaning liquid from them are known.

For example, Patent Document 1 discloses a range hood that aims to reduce the effort of cleaning a filter on which oil, dust, etc. have adhered and accumulated. This range hood has a filter connected to a driving means in front of a blower casing disposed in a ventilation path that communicates a suction port and a discharge port, a cleaning casing surrounding the filter, and a large number of small injection ports. The cleaning device includes an array of nozzles, a water supply means for supplying water to the nozzles, and a means for collecting waste water scattered inside the cleaning casing. The nozzle is configured with a large number of injection ports having small holes arranged in a straight line from the center side of the filter toward the circumferential edge of the filter, and by spraying the cleaning liquid from each injection port, the cleaning liquid can be sprayed over a wide range.

Japanese Patent Application Publication No. 2008-122063

However, the nozzle having such a configuration requires a relatively high water pressure to inject the cleaning liquid from the injection ports of the plurality of small holes, and a water supply pump that satisfies this requirement is required.
SUMMARY OF THE INVENTION Therefore, the present invention provides a range hood in which dirt is removed by spraying cleaning liquid over an area where oil is likely to adhere even with a water supply pump having a lower water pressure than in the past.

In order to solve the above problems, we have developed a range hood that sucks air containing oil generated during cooking and collects the oil.It is rotated by a motor, generates a flow of air containing oil, and captures the oil. an impeller of a centrifugal blower that collects the oil, a fan casing that includes the impeller therein and has a suction port that sucks the oil-containing air by rotation of the impeller, and an injection part that injects cleaning liquid, a washing mechanism for washing a car; the injection unit has an injection port that sprays a cleaning liquid; and a diffusion plate that diffuses the cleaning liquid injected from the injection port; A range hood is provided that injects a cleaning liquid toward the inside of the impeller and causes the cleaning liquid to collide with the inside of the blades of the impeller .
According to this, by having an injection port that injects cleaning liquid and a diffusion plate that diffuses the cleaning liquid, even a water supply pump with lower water pressure than before can spray cleaning liquid over an area where oil is likely to adhere, and remove dirt. Moreover, an inexpensive range hood can be provided.

Furthermore, the diffusion plate may be arranged near the blades of the impeller so that the cleaning liquid injected from the injection port collides with the inside of the blades.
According to this, by spraying cleaning liquid from the suction port side toward the inside of the fan casing and colliding with the inside of the impeller blades, the cleaning liquid passes over the inside surface of the blades where dirt adheres, removing dirt. can do.

Furthermore, the diffusion plate has a diffusion surface that receives and diffuses the cleaning liquid injected from the injection port, and the virtual surface including the diffusion surface includes at least a part of the edge of the blade on the rotation shaft side of the motor. You can also use it as
According to this, the virtual surface is provided so as to include the edge of the blade of the impeller on the rotating shaft side, so that the spreading cleaning liquid can be caused to collide with the entire inside of the blade. In addition, since the virtual surface is provided so as to include a part of the edge of the blade on the rotating shaft side, the planar cleaning liquid collides with the edge on the rotating axis side at one point, thereby preventing the cleaning liquid from scattering. I can do it.

Further, the impeller has a flat grease filter therein having a surface substantially perpendicular to the rotational axis of the motor, and the diffusion surface is a surface substantially perpendicular to the grease filter, or in the rotational direction of the impeller. , the grease filter may be characterized by being a surface inclined toward the downstream side from a surface substantially perpendicular to the grease filter.
According to this, the cleaning liquid is scattered because the diffusion surface is a surface that is substantially perpendicular to the grease filter, or a surface that is inclined downstream from a surface that is substantially perpendicular to the grease filter in the rotation direction of the impeller. prevent this from happening.

Furthermore, the diffusion plate has a base surface on the base side of the diffusion surface that includes a surface that includes almost the same direction as the direction in which the cleaning liquid is sprayed by the injection port, and there is no step between the base surface and the peripheral edge of the injection port. may be a feature.
According to this, the base surface is in substantially the same direction as the direction in which the cleaning liquid is sprayed, and there is no difference in level from the peripheral edge of the injection port, so that the cleaning liquid does not hit the diffusion plate and scatter.

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

Further, the diffusion plate is arranged closer to the blade than the intermediate position between the rotation axis of the motor and the blade of the impeller, and the distance from the injection port to the first end of the distal end of the diffusion plate on the side of the rotation axis of the motor is as follows: The distance may be longer than the distance from the injection port to the second end on the blade side of the distal end of the diffuser plate.
According to this, smooth suction can be ensured by providing the diffusion plate at a position where it does not interfere with suction, and since the cleaning liquid is also diffused near the rotation axis of the fan, uniform cleaning can be achieved.

Furthermore, the injection port is arranged closer to the blade than the intermediate position between the rotation axis of the motor and the blade of the impeller, and the direction in which the injection port sprays the cleaning liquid is approximately parallel to the rotation axis or inclined toward the rotation axis. This may be a feature.
According to this, by providing the diffusion plate at a position where it does not interfere with suction, smooth suction can be ensured, and the cleaning liquid can also be easily diffused near the rotation axis of the fan.

As explained above, according to the present invention, it is possible to provide a range hood that sprays cleaning liquid over a range where oil is likely to adhere and removes dirt even with a water supply pump having a lower water pressure than conventional ones.

The (A) front view, (B) top view, (C) bottom view, (D) left side view, and (E) right side view of the first example of the range hood according to the present invention. (A) A perspective view seen from the upper right, and (B) a perspective view seen from the lower right of the first embodiment of the range hood according to the present invention. FIG. 1 is a developed perspective view of the first embodiment of the range hood according to the present invention, viewed from the lower right. FIG. 1 is an explanatory diagram illustrating a cleaning mechanism of the first embodiment of the range hood according to the present invention. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. 1 of the first embodiment of the range hood according to the present invention. FIG. 2 is a sectional view taken along the line BB shown in FIG. 1 of the first embodiment of the range hood according to the present invention. FIG. 2 is a sectional view taken along the BB section shown in FIG. 1 (with the bell mouth removed) of the first embodiment of the range hood according to the present invention. 1 is a cross-sectional view taken along the BB cross section shown in FIG. 1 (with the bell mouth and cleaning mechanism removed) of the first embodiment of the range hood according to the present invention. FIG. 2 is a sectional view taken along the line CC shown in FIG. 1 (with the damper in an open state) of the first embodiment of the range hood according to the present invention. FIG. 2 is a sectional view taken along the line DD shown in FIG. 1 (with the damper closed) of 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, and (E) right side view of the bell mouth in the first example 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 the lid is open), (F) Perspective view from the upper right (when the lid is closed). 1. (A) An enlarged sectional view of a recovery part, and (B) an enlarged sectional view of a dotted line portion in (A), in the DD cross section shown in FIG. 1, of 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) Right side view, (F) of the injection part in the first embodiment of the range hood according to the present invention. ) A perspective view seen from the high upper right, (G) a perspective view seen from the low upper right, and (H) a perspective view seen from the lower right. (A) A front view, (B) a right side view, and (C) a perspective view seen from the lower right upper side for explaining the injection of cleaning liquid from the injection part in the first embodiment of the range hood according to the present invention. FIG. 3 is an enlarged perspective view of the injection unit in the first embodiment of the range hood according to the present invention, when viewed from the rotation axis toward the blades.

EMBODIMENT OF THE INVENTION Below, each Example based on this invention is described, referring drawings.
<First example>
A range hood 1 according to this embodiment will be described with reference to FIGS. 1 to 15. The range hood 1 has a thin hood portion 2 having an upper concave inner panel 4 on the inner surface for collecting steam, oil smoke, etc. generated by cooking performed below. The hood part 2 is connected to a blower box 3 connected to an exhaust duct DU near a communication port 6 located slightly to the right of the rear surface. Further, the hood part 2 is provided with a rectifying plate 5 on the lower side to increase the wind speed around the hood part 2 and to make it easier to capture oil smoke and the like rising from below. A switch 610 is provided on the front side of the hood portion 2 and is operated by the user to instruct the air volume during exhaust or to instruct cleaning. Further, a shutter SH for preventing backflow of air is provided near the exhaust duct DU.

The blower box 3 has an introduction part 7 that introduces the air flow AR containing oil smoke etc. captured by the hood part 2 into the inside of the blower box 3 through the communication port 6, and an introduction part 7 that introduces the air containing oil from the introduction part 7. a fan casing 200 having a suction port 210 that sucks in air; an impeller 100 (also referred to as a fan) included inside the fan casing 200; a motor 130 that rotationally drives the impeller 100; A cleaning mechanism 400 that cleans the grease filter 120, the blades 110 of the impeller 100 and the grease filter 120, and a blower box 3 that communicates with the fan casing 200 to remove oil and exhaust purified air to the exhaust duct DU. The damper 300 is placed on the air flow path from the impeller 100 to the exhaust port 500, which is an opening opened to the exhaust port 500, and controls the rotation of the impeller 100, the opening and closing of the damper 300, the operation of the cleaning mechanism 400, etc. and a control unit 600.

Note that the blower box 3 is provided slightly to the right of the hood portion 2 when viewed from the front. This is because, in the case of this embodiment, the exhaust port 500 connected to the exhaust duct DU is provided on the left side of the blower box 3, and when the exhaust port 500 is provided on the right side, the 3 may be provided slightly to the left of the hood portion 2 when viewed from the front. In this way, by locating the exhaust port 500 on the side surface of the blower box 3, the effective height of the range hood 1 including the space for routing the exhaust duct DU can be made lower than when the exhaust port 500 is provided on the top surface of the blower box 3. This increases the flexibility of installation locations.

The impeller 100 is mainly a fan (blower) that generates an air flow AR to collect oil-containing air generated by cooking performed below. be. 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 panel 4. The introduction section 7 draws the oil-containing air that has moved between the current plate 5 and the inner surface panel 4 upward through the communication port 6. The introduction part 7 rises vertically from the communication port 6 while having a cross-sectional area approximately equal to the area of the communication port 6, and introduces the air flow AR containing oil into the suction port 210 of the fan casing 200.

The impeller 100 is a so-called sirocco fan that has a plurality of blades 110 on its cylindrical side surface with gaps 115 between the blades 110. In addition, in this embodiment, as will be described later, since the cleaning liquid is made to collide with the inner surface 111 of the blade 110 (the surface on the rotating shaft side), the blade 110 is It is preferable that the inner surface of one blade 110 is not hidden by other blades 110 or its own outer surface 114 (the surface opposite to the surface on the rotation axis side). That is, when viewed from the rotating shaft 131, the edge 113 (outer edge) of one blade 110 on the fan casing 200 side is hidden by the edge 112 (inner edge) of the adjacent blade 110 on the rotating shaft side. Never. Note that the fan (air blower) used in the present invention is an impeller 100 that is a centrifugal blower as in this embodiment.

Note that, as shown in FIG. 5, the rotating shaft 131 of the motor 130 is installed so as to be substantially horizontal, so that the line connecting the base 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 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 be able to sufficiently resist air resistance during exhaust operation and liquid resistance during cleaning. A boss groove 136 is provided on the central rear side of the rotary shaft 131 to receive the rotational force of the motor 130 by fitting a motor pin 135 provided on the rotation shaft 131 into the boss groove 136. ensure that the information is communicated to the

As shown in FIGS. 5 and 8, the grease filter 120 is a flat disc that is attached to the tip 133 of the rotating shaft 131 of the motor 130 so as to be perpendicular to the rotating shaft 131, and the outer edge thereof is attached to the tip 133 of the rotating shaft 131 of the motor 130. It is attached so as to be close to the inner (rotating shaft side) edge 112. This reduces leakage of oil-containing air from between the blades 110 and the grease filter 120, and increases the rate at which oil is captured. Further, the grease filter 120 is installed on the front side of the rotational force transmission plate 134 and approximately at the center of the blade 110 in the depth direction. Since the grease filter 120 is located upstream of the rotational force transmission plate 134 in the air flow, the grease filter 120 prevents oil from adhering to the rotational force transmission plate 134, and is also attached to approximately the center of the blade 110 in the depth direction. This prevents oil from adhering to the inner side of the center.

The grease filter 120 is a flat disk with holes through which air passes, and when the air rotates with the impeller 100 and passes through the holes, oil collides with the flesh other than the holes and adheres to the air. Removes oil contained in. In this embodiment, the grease filter 120 is a flat disk, but it is not limited to this, and may be curved in a dish shape, or the cross section including the rotating shaft 131 of the motor 130 may be expanded toward the front side. It may also be a trapezoidal grease filter.

As mainly shown 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 the oil contained in the air flow AR is removed from the cylindrical side surface of the impeller 100. The grease collides with the grease filter 120 provided inside the cylinder of the impeller 100 or the impeller 100, and adheres thereto. As a result, oil is removed from the oil-containing air, and the oil-removed air passes inside the fan casing 200 and outside the impeller 100, and when the damper 300 is in the open state, the oil-free air passes through the fan casing 200 when the damper 300 is in the open state. The air is discharged to an exhaust port 500 located on the side (left lateral direction) of the exhaust port 500, and is exhausted to the outside air through an exhaust duct DU connected to the exhaust port 500.

As shown in FIG. 9, the exhaust port 500 is provided at a position higher than the lowest point 200Z of the fan casing 200 in the vertical direction. That is, the position of the lowest point 500Z of the exhaust port 500 is higher than the position of the lowest point 200Z of the fan casing 200. According to experimental values, the line connecting the lowest point 500Z of the exhaust port 500 and the lowest point 200Z of the fan casing 200 preferably has an angle of 10 degrees or more, more preferably 15 degrees or more, with the horizontal line. By doing this, it is possible to smoothly guide 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 to the lowest point 200Z of the fan casing 200. This can prevent stagnation.

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

The damper 300 is mainly located inside the fan casing 200 as shown in FIG. It is provided near the exhaust port 500. The damper 300 has a rotating shaft 311, and opens and closes an air flow path by rotating around the rotating shaft 311. The damper may be of a sliding type or the like to open and close the air flow path, but since the damper 300 has the rotating shaft 311, the hole made in the fan casing 200 can be minimized in size and the cleaning water can flow outside the fan casing 200. It becomes difficult to leak. Further, since the holes made in the fan casing 200 are small, the airtightness of the fan casing 200 is improved, and it becomes possible to efficiently exhaust air when the fan is driven.

The damper 300 shown in FIG. 9 is mainly in an exhaust operation state, and is in a state where the air from which oil has been removed from inside the fan casing 200 is exhausted to the exhaust port 500, so the flow path to the exhaust port 500 is opened. It is in the closed state (open state). The rotation shaft 311 of the damper 300 is located on the side biased toward one end 310, and the one end 310 is located at the other end 320 (the other end of the damper 300 opposite to the one end 310 with the rotation shaft 311) when the damper 300 is in the open state. end 320). That is, the rotating shaft 311 is at the highest position in the damper 300 when it is in the open state. In this way, when the damper is in the open state, the rotating shaft is located at a higher position than the other end, which reduces the amount of oil adhering to the damper flowing to the rotating shaft. It is possible to prevent problems such as failure. Note that in this embodiment, the rotating shaft 311 of the damper 300 is located at the one end 310, but it may be located on the side closer to the one end 310 than the center of the damper 300 in the flow path direction.

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 create resistance to the air flow AR. Further, when the damper 300 in the open state is housed in the damper accommodating portion 330, the damper 300 contacts the inside of the fan casing 200 only at the other end 320. If the damper 300 contacts the fan casing 200 with its surface, it may become stuck due to oil, but by contacting only the other end 320, the damper 300 will not become stuck when changing the damper 300 from the open state to the closed state. This prevents problems that may occur due to the inability to close the door.

As mainly shown in FIG. 11, the bell mouth 211 is configured to be detachable from the fan casing 200 for easy cleaning. The bottom view of this figure (C) shows the front side when the bell mouth 211 is attached to the fan casing 200, and the top view of this figure (B) shows 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, which will be described later, and an injection section 460 or a water supply section 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 part 460/water supply part 460 is provided so as to be hidden by the bell mouth cover part 212 when viewed from the front. is less exposed to oil-containing air, making it less likely that oil will adhere to it.

The cleaning mechanism 400 is primarily a mechanism for cleaning the blades 110 of the impeller 100 and the grease filter 120, as shown in FIG. Note that if the grease filter 120 is not provided inside the impeller 100, the cleaning mechanism 400 cleans the blades 110 of the impeller 100 because the oil will be captured by the blades 110 of the impeller 100. The cleaning mechanism 400 includes a tank 410 that is stored in a tank accommodating portion 412 located near the rear side of the bottom surface of the hood portion 2 and stores cleaning liquid, 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 cleaning liquid from the tank 460 to the water supply unit 460, a pump 420 that is arranged between the water supply unit 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 unit 460. It includes a foreign matter removal filter 440 that removes foreign matter mixed into the cleaning fluid, and a recovery section 430 that supplies water from the water supply section 460 and recovers the cleaning fluid after cleaning the impeller 100 and the like to the tank 410.

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

The tank 410 has a tank lid 411 that opens by pressing and closes by removing the pressing force, a purification filter section 416 below the tank lid 411, and is connected to a position that matches the tip of the water supply pipe 450 when stored. It has a hole 415. Since the diameter of the connection hole 415 is small and the tank lid 411 is closed when taken out, the cleaning liquid contained therein can be prevented from spilling even when the user carries the tank 410. Note that 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 section 416 removes and purifies the collected cleaning liquid by removing oil and the like contained therein in order to circulate the cleaning liquid and return it to the tank 410 .

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

The pump 420 has an output that moves the cleaning liquid from the tank 410 to a water supply part 460 located at a high position, and also has an output that generates water pressure to forcefully spray the cleaning liquid when the water supply part 460 functions as the injection part 460. has. However, even in that case, the injection part 460 has a hole with an inner diameter comparable to the inner diameter of the water supply pipe 450, and the injection is made from that hole, so the output is larger than when injection is made from a small hole. does not require. Further, it is preferable that the pump 420 not only rotate forward to move the cleaning liquid from the tank 410 to the water supply section 460, but also rotate in the reverse direction to move the cleaning liquid from the water supply section 460 to the tank 410.

The water supply unit 460 supplies water into the fan casing 200 with a cleaning liquid to clean the blades 110 and the like of the impeller 100. However, when cleaning the blades 110 and the grease filter 120 by colliding the cleaning liquid with the cleaning liquid, the cleaning liquid is applied with force. It often functions as an injection section 460 that injects toward the blades 110 and the grease filter 120. In this embodiment, the water supply section 460 functions as the injection section 460, and therefore will be described as the injection section 460 below.

The spraying section 460 is configured to spray the cleaning liquid over a wide area inside the fan casing 200 toward the blades 110 of the impeller 100 and the grease filter 120 . 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 tends to adhere. The injection part 460 is preferably located near the peripheral edge of the suction port 210, that is, inside the impeller 100 and near the blades 110, and the closer the blades 110, the better, as long as they do not contact each other. As a result, the cleaning liquid injected from the injection part 460 strongly collides with the blade 110. Furthermore, if the injection part 460 is located at the center of the impeller 100, the injection part 460 may become an obstacle during exhaust operation and reduce the performance of suctioning oil-containing air. This problem does not occur by providing it near the section.

Furthermore, the injection section 460 is provided below the tip 133 of the rotating shaft 131 of the motor 130. For example, if the injection part 460 is provided above the rotation shaft 131, the injection part 460 will inject the cleaning liquid toward the blade 110 located at a higher position than the rotation axis 131 during rotation, and the cleaning liquid will rebound after collision and be sucked in. It will scatter beyond the mouth 210. Therefore, with this configuration, it is possible to prevent the sprayed cleaning liquid from scattering from the suction port 210 or from dripping from the spraying section 460.

Further, when the rotation direction 100DR of the impeller 100 is clockwise as shown in FIG. It is preferable to provide it on the right side of the lowest point 100Z. That is, the injection part 460 is preferably provided in a quarter portion 100ZU below the tip 133 of the rotation shaft 131 of the motor 130 and upstream from the lowest point 100Z of the impeller 100 in the rotation direction 100DR. By providing the injection part 460 in such a quarter part 100ZU, the cleaning liquid that is injected toward the impeller 100 and collides with it immediately moves downward in the rotational direction, so that it can be prevented from scattering from the suction port 210. In addition, when the injection part 460 is provided at the position of the quarter part, the injection part is placed 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 rotational direction. Since the amount of air containing oil and the like that collides with the injection section is smaller than in the case where the injection section is provided, the adhesion of dirt can be reduced.

The inner diameter of the suction port 210 of the fan casing 200 is smaller than the inner diameter of the impeller 100, as mainly shown in FIGS. 6 and 7. As a result, oil contained in the air that has passed through the suction port 210 collides with the inside of the blades 110 of the impeller 100. The injection part 460 is provided inside the impeller 100 and outside the suction port 210 when viewed from the direction of the rotating shaft 131 of the motor 130. According to this, since the fan casing 200 is present on the front side of the injection part 460, it is possible to prevent the cleaning liquid from splashing beyond the suction port 210, and to direct the cleaning liquid toward the inside of the impeller 100 where dirt tends to adhere. Since the cleaning liquid can be directly sprayed, cleaning can be carried out effectively. Note that 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. In addition, the inner diameter refers to the distance from the center of the opening (in this embodiment, the intersection of the axis center line of the rotating shaft 131 and the opening) to the periphery; however, the inner diameter of the bell mouth 211 in this embodiment is the center of the opening. It may also be the distance from the point closest to the center of the bell mouth cover section 212. That is, at least at the position where the injection part 460 is provided, the inner diameter of the suction port 210 of the fan casing 200 (in the case where the bell mouth 211 is attached and used, the inner diameter of the opening of the bell mouth 211) is the inner diameter of the impeller 100. It would be better if it were smaller.

Moreover, the injection part 460 may inject the cleaning liquid toward the downstream side 100ZD from the injection part 460 in the rotation direction 100DR of the impeller 100 shown in FIG. According to this, by injecting the cleaning liquid from the injection part 460 to the downstream side 100ZD, the cleaning liquid that collides with the blades 110 of the impeller 100 smoothly flows downstream in the rotation direction, so that the collided cleaning liquid is scattered. This can be further prevented.

As shown in FIGS. 4, 12, and 13, the recovery section 430 mainly includes the bottom section 214 of the fan casing 200, which receives the cleaning liquid after the spray section 460 injects and cleans the blades 110 and the grease filter 120, and the bottom section 214 of the fan casing 200. The fan casing cleaning liquid discharge port 213 is located at the bottom 214 of the casing 200 and is located slightly closer to the tank 410 than the lowest point 200Z of the fan casing 200. 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 outlet 213 is provided at a position slightly closer to the tank 410 than the lowest point 200Z of the fan casing 200, that is, at a position shifted downstream from the lowest point 200Z in the rotational direction 100DR. Thereby, even if the cleaning liquid tries to rise up the bottom 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 outlet 213.

The drain pipe 431 extends diagonally downward from a position that coincides with the fan casing cleaning liquid discharge port 213 so as to return the cleaning liquid to the tank 410, and is disposed at a position that coincides with the tank lid 411 of the tank 410. Note that by extending the drain pipe 431 diagonally downward, it becomes possible to shift the tank 410 laterally from the lowest point 200Z of the fan casing 200, thereby making the overall height of the range hood 1 relatively smaller. It can be lowered.

When the tank lid 411 is stored in the tank accommodating part 412, it is pressed by a protruding part 417 protruding from the top surface of the tank accommodating part 412, so that the dirty cleaning liquid flowing from the drain pipe 431 is received into the tank 410. open. The dirty cleaning liquid is filtered by the purification filter section 416, and the purified cleaning liquid is returned 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 is supplied to the water supply pipe 450. Note that the cleaning liquid thus circulated may contain foreign matter that cannot be removed by the purification filter section 416 during the cleaning process. In such a case, it may cause a failure of the pump 420, so one or more foreign matter removal filters 440 are provided in the cleaning fluid supply pipe 450 between the tank 410 and the injection unit 460 to remove foreign matter mixed into the cleaning fluid. is preferred.

Further, when the pump 420 is rotated in the reverse direction to move the cleaning liquid from the injection unit 460 to the tank 410, the foreign matter removal filter 440 is provided between the tank 410 and the pump 420, so that when the cleaning liquid is flowing in the forward direction, foreign matter is removed. Since the foreign matter attached 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. This can prevent foreign matter from entering the inside of the pump 420. Furthermore, when the pump 420 is rotated in the reverse direction, foreign matter can be prevented from entering the pump 420 by providing the foreign matter removal filter 440 between the tank 410 and the pump 420, that is, on the upstream side of the pump in the forward direction of the cleaning liquid. .

The connection hole 415 is provided with an elastic material, and the end surface of the water supply pipe 450 on the tank storage section 412 side is pressed against the elastic material when the water supply pipe 450 is stored in the tank storage section 412, thereby preventing the cleaning liquid from leaking. It is configured so that it does 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 control unit 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 a damper motor (not shown), and controls the operation of the pump 420. The operation of the cleaning mechanism 400 is controlled by the control, and the motor 130, damper motor, pump 420, etc. are controlled based on the input of the switch 610. The control unit 600 is composed of a control program built into a microcomputer, and is provided in the blower box 3 in this embodiment, but is not particularly limited and may be provided in the hood part 2.

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

The injection part 460 of the range hood 1 according to the present invention will be described with reference to FIGS. 14 to 16. In this embodiment, when the rotational direction 100DR of the impeller 100 is clockwise rotation when viewed from the front, the injection unit 460 is located at the lower right quarter portion 100ZU in the front view as shown in FIG. (near the blades 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 of the impeller 100 and the grease filter 120.

The injection unit 460 has an injection port 461 that actually sprays the cleaning liquid, and a diffusion plate 463 that diffuses the cleaning liquid injected from the injection port 461. The injection port 461 is a single large hole, unlike the conventional nozzle which has a large number of small injection holes arranged in an array, and is connected to a water supply pipe that supplies cleaning liquid. The hole has an inner diameter that is approximately the same as 450. As a result, there is no need to apply large water pressure to the spraying, so that the cleaning liquid can be sprayed even with the pump 420 having a lower water pressure than before.

Note that, of course, the number of injection ports 461 is not limited to one, but it is not preferable to divide them into too many parts. Even in the case of 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. Further, 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 as in this embodiment, the injection port 461 is provided at a position corresponding to the end surface of the water supply pipe 450. It is preferable that Thereby, the cleaning liquid can be injected even with the pump 420 having a lower water pressure.

On the other hand, with only such an injection port 461, it is not possible to inject the cleaning liquid over a wide range from the vicinity of the blade 110 toward the blade 110 on the cylindrical side of the impeller 100 or the grease filter 120 located at the center of the cylinder. difficult. The diffusion plate 463 diffuses the cleaning liquid injected from the injection port 461, thereby making it possible to spray the cleaning liquid over a wide range. In this way, the injection part 460 has the injection port 461 that injects the cleaning liquid and the diffusion plate 463 that diffuses the cleaning liquid, so that even the pump 420, which has a lower water pressure than before, can spray the cleaning liquid over the range where oil is likely to adhere. It is possible to provide an inexpensive range hood 1 that can be sprayed, remove dirt, and be inexpensive.

Further, the diffusion plate 463 is arranged near the blades 110 of the impeller 100 and is provided so that the cleaning liquid injected from the injection port 461 collides with the inner surface 111 of the blade 110. Note that the vicinity of the blade 110 refers to the side closer to the blade 110 than the intermediate position between the rotary shaft 131 of the motor 130 and the blade 110, but the closer the blade 110 is, the better, as long as the blade side edge 463EH of the diffuser plate 463 does not come into contact with the blade 110. . According to this, by injecting the cleaning liquid from the suction port 210 side and colliding with the inside 111 of the blades 110 of the impeller 100, the inwardly curved surface of the inside 111 of the blade 110, where dirt adheres, receives the cleaning liquid. , the cleaning liquid is not only on the front side (front side) where the cleaning liquid directly collides with the inner side 111 of the blade 110, but also on the inner side 111 of the blade 110 that is deeper than the grease filter 120 (on the back side). By passing through it, dirt can be removed from the entire inner surface 111 of the blade 110.

Further, the diffusion plate 463 is formed eccentrically 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 shaft side edge 463EC of the diffusion plate 463. Similarly, the distance L1 from the injection port 461 to the first end 468 of the tip 467 of the diffuser plate 433 on the rotating shaft 131 side of the motor 130 is the distance L1 from the injection port 461 to the first end 468 of the tip 467 of the diffuser plate 433 on the blade 110 side. It is longer than the distance L2 to the second end 469 of. By doing this, the piping of the water supply pipe 450 can be kept as close to the blade 110 as possible, and by providing the diffuser plate 463 in a position that does not interfere with the suction, smooth suction can be ensured, and the rotation axis 131 can be Since the diffusion plate 463 is provided close to the impeller 100, the cleaning liquid is also diffused near the rotation axis of the impeller 100, allowing uniform cleaning over a wide area.

More specifically, the diffusion plate 463 has a diffusion surface 464 that receives and diffuses the cleaning liquid injected from the injection port 461. As shown in FIG. 15, the cleaning liquid injected from the injection port 461 immediately advances in the axial direction of the water supply pipe 450 near the injection port 461 (WW1 direction, which is a direction perpendicular to the end surface of the water supply pipe 450). . However, the cleaning liquid injected in the axial direction from the injection port 461 is received by the collision area CA of the diffusion surface 464, and the cleaning liquid flows along the diffusion surface 464, in other words, in a direction parallel to the diffusion surface 464 (W direction). You can change your course. The cleaning liquid that has changed its course in a direction parallel to the diffusion surface 464 (WW direction) further spreads beyond the range of the diffusion surface 464 so as to spread from the collision area CA (WW direction). The cleaning liquid thus diffused beyond the range of the diffusion surface 464 will proceed along the virtual surface VA that includes the diffusion surface 464 and extends around it.

Further, the diffusion plate 463 has a base surface 465 on the base side (water supply pipe 450 side) of the diffusion surface 464, which has a surface that includes substantially the same direction as the direction WW1 in which the injection port 461 injects the cleaning liquid. It is preferable that the peripheral edge 462 of the injection port 461 has no step. The phrase "there is no step" means that the generatrix of the cylinder 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 cleaning liquid jetting direction WW1 in FIG. 15(B), the jetting direction WW1 and the surface of the base surface 465 match. In this way, since the base surface 465 is in substantially the same direction as the direction WW1 in which the cleaning liquid is sprayed, and there is no difference in level from the peripheral edge 462 of the injection port 461, the cleaning liquid flows from the base surface 465 to the diffusion surface 464 as if sliding. Therefore, it does not hit the diffusion plate 463 and scatter. Further, the diffusion plate 463 may have a bent portion 466 between the diffusion surface 464 and the base surface 465. By having the bending portion 466 that allows changing the direction WW1 in which the cleaning liquid is sprayed and the direction WW in which the cleaning liquid actually spreads, the direction in which the cleaning liquid is spread can be controlled.

After the cleaning liquid sprayed in the WW1 direction by the injection port 461 collides with the collision area CA of the diffusion surface 464, it spreads to both sides in the direction of the blade side edge 463EH and the rotating shaft side edge 463EC of the diffuser plate 463, and spreads to at least the rotating shaft 131 side. Now, adjust the water pressure of the pump 420 so that it spreads 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 467, and when it spreads beyond the diffusion surface 464, it diffuses in the plane direction of the virtual surface VA including the diffusion surface 464. go. The cleaning liquid that diffuses along the virtual plane VA is distributed from the inner surface 111 of the blade 110 near the blade side edge 463EH to the center of the grease filter 120 in the direction extending from the injection port 461 to the first end 468. It has been spread far and wide.

The virtual surface VA including the diffusion surface 464 may be provided so as to include the edge 112 of the blade 110 on the rotating shaft 131 side of the motor 130. This allows the cleaning liquid to be diffused to collide with the entire surface of the inner side 111 of the blade 110. Further, the virtual surface VA including the diffusion surface 464 may be provided so as to include a part of the edge 112 of the blade 110 on the rotating shaft 131 side of the motor 130, as shown in FIG. In this way, if the virtual surface VA does not include the entire edge 112 on the rotation axis 131 side, but is slightly inclined to the edge 112 and includes a part of the edge 112, the planar shape along the virtual surface VA Since the cleaning liquid collides with the nearest edge 112 at one point in the process of the edge 112 moving in the rotational direction 100DR of the impeller 100, it is possible to prevent the cleaning liquid from scattering. Further, it is preferable that the virtual surface VA including the diffusion surface 464 is provided such that the virtual surface VA on the side away from the rotating shaft 131 including the diffusion surface 464 intersects with only one blade 110. According to this, the cleaning liquid can collide with the entire inside surface 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 of the blade 110 on the fan casing 200 side. As a result, as the blade 110 moves, the cleaning liquid is injected from the vicinity of the edge 113 of the blade on the fan casing 200 side to the edge 112 of the motor rotating shaft 131 side, so that the cleaning liquid is not allowed to collide with the entire inside surface 111 of the blade 110. I can do it. The vicinity of the edge 113 on the fan casing 200 side refers to the area closer to the fan casing 200 than 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, the better. Furthermore, if the virtual surface VA including the diffusion surface 464 is provided near the edge 113 of the blade 110 on the fan casing 200 side and does not include the edge 113 on the fan casing 200 side, the edge on the fan casing 200 side Although the cleaning liquid is not injected to the fan casing 113, the cleaning liquid flows to the edge 113 on the fan casing 200 side due to centrifugal force. Thereby, the entire inner surface 111 of the blade 110 can be collided with.

Further, when the impeller 100 has inside the flat grease filter 120 having a surface substantially perpendicular to the rotation axis 131 of the motor 130, the diffusion surface 464 is a surface substantially perpendicular to the grease filter 120, or the impeller In the rotation direction 100DR of the grease filter 100, the surface may be inclined toward the downstream side from a surface substantially perpendicular to the grease filter 120. This prevents the cleaning liquid from colliding with the surface of the grease filter 120 in the direction opposite to the direction in which it rotates, thereby preventing the cleaning liquid from scattering.

Further, in the present embodiment, the direction WW1 in which the injection port 461 injects the cleaning liquid is approximately parallel to the rotation axis 131, but may be inclined toward the rotation axis 131. In this case, the injection part 460 is arranged near the blade 110 and the diffuser plate 463 is provided at a position where it does not interfere with the suction, thereby ensuring smooth suction, and the overall direction toward the rotation axis 131 of the impeller 100. Since the cleaning liquid is diffused, the cleaning liquid is also easily diffused near the rotating shaft 131 of the impeller 100.

It should be noted that the present invention is not limited to the illustrated embodiments, and can be implemented with configurations within a range that does not depart from the content described in each section of the claims. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, there may be other modifications to the embodiments described above without departing from the spirit and scope of the invention. Those skilled in the art can make various modifications in application examples and other detailed configurations.

1 Range hood 2 Hood section 3 Air blower box 4 Inner panel 5 Current plate 6 Communication port 7 Introduction section 100 Impeller (fan)
110 Blade 111 Inside of blade 112 Edge of blade on rotating shaft side 113 Edge of blade on fan casing side 114 Outside of blade 115 Gap between blades 120 Grease filter 130 Motor 131 Rotating shaft 132 Base of rotating shaft 133 Tip of rotating shaft 134 Rotational force transmission plate 135 Motor pin 136 Boss groove 200 Fan casing 210 Suction port 211 Bell mouth 212 Bell mouth cover portion 213 Fan casing cleaning liquid outlet 214 Fan casing bottom 300 Damper 310 One end 311 Rotating shaft 320 Other end 330 Damper housing portion 400 Cleaning Mechanism 410 Tank 411 Tank lid 412 Tank storage section 413 Tank storage section lid 414 Liquid suction port 415 Connection hole 416 Purification filter section 417 Projection section 420 Pump 430 Recovery section 431 Drainage pipe 440 Foreign matter removal filter 450 Water supply pipe (tank and injection section cleaning fluid flow path between
460 Injection part (water supply part)
461 Injection port 462 Peripheral part of injection port 463 Diffusion plate 464 Diffusion surface 465 Base surface 466 Bent part 467 Tip part 468 First end part 469 Second end part 500 Exhaust port 600 Control part 610 Switch 100Z Lowest point of impeller 100ZU Quarter part on the upstream side of the lowest point of the impeller 100DR Rotating direction of the impeller 200Z Lowest point of the fan casing 463EH Blade side edge of the diffuser plate 463EC Rotating shaft side edge of the diffuser plate 500Z Lowest point of the exhaust port DU Exhaust duct SH Shutter AR Air flow WW Path of cleaning liquid CA Collision area VA Virtual surface

Claims (8)

A range hood that sucks air containing oil generated during cooking and collects the oil.It is rotatably driven by a motor and includes a centrifugal blower impeller that generates a flow of air containing oil and collects the oil. a fan casing that includes the impeller therein and has a suction port that sucks the oil-containing air through rotation of the impeller;
a cleaning mechanism that has a spraying section that sprays a cleaning liquid and cleans the impeller;
Equipped with
The injection part has an injection port that injects a cleaning liquid, and a diffusion plate that diffuses the cleaning liquid injected from the injection port, and injects the cleaning liquid from the suction port side toward the inside of the fan casing, impinging a cleaning liquid on the inside of the blades of the impeller;
Range food.

The range hood according to claim 1, wherein the diffusion plate is disposed near the blades of the impeller so that the cleaning liquid injected from the injection port collides with the inside of the blades. The diffusion plate has a diffusion surface that receives and diffuses the cleaning liquid injected from the injection port,
The range hood according to claim 1 or 2, wherein the virtual surface including the diffusion surface includes at least a part of an edge of the blade of the impeller on the rotation shaft side of the motor .
The impeller has therein a trapezoidal grease filter whose cross section including the rotation axis of the motor widens toward the front side ;
The diffusion surface is a surface that is substantially perpendicular to the grease filter, or a surface that is inclined downstream from a surface that is substantially perpendicular to the grease filter in the rotational direction of the impeller. The range hood described in 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 jetting port jets 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 arranged closer to the blade than an 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 on the rotating shaft side of the motor at the tip of the diffuser plate is less than the distance from the injection port to the second end on the blade side at the tip of the diffuser plate. The range hood according to any one of claims 1 to 6, characterized in that it is long. The injection port is arranged closer to the blade than an intermediate position between the rotating shaft of the motor and the blade of the impeller,
The range hood according to any one of claims 1 to 7, wherein the direction in which the injection port injects the cleaning liquid is substantially parallel to the rotation axis or inclined toward the rotation axis.

Images