JP2017125620A - Range hood - Google Patents

Abstract

A range hood capable of cleaning an entire impeller including a main plate and maintaining the aesthetic appearance of the impeller after cleaning is provided.
A cleaning casing has at least an extending plate and a water spray nozzle that face in a lateral direction toward a blower outlet, and the water spray nozzle is perpendicular to a rotating shaft on the extending plate. The injection angle as viewed from the plane is opposite to the rotation direction of the impeller 10 and is provided so that the cleaning liquid 51 can be injected between two adjacent blades. The injection angle as viewed from the same plane as the rotation shaft 21 is adjacent. By providing the cleaning liquid 51 injected between the two oil collecting mechanisms 30 and sprayed to the main plate 17 so as to be landed, the cleaning liquid 51 injected during cleaning passes through the blade and the oil collecting mechanism 30 and passes through the main plate. In addition to landing near the rotating shaft 21 of the 17 and peeling off the dirt, the dirt on the main plate 17 is peeled off to the outer peripheral side by the centrifugal force due to the inclination of the main plate 17 and the rotation of the impeller 10.
[Selection] Figure 9

Description

  The present invention relates to removal of dirt from an oil collecting mechanism attached to a range hood.

  Conventionally, as shown in FIG. 13, this type of range hood is provided with a suction port 101 for collecting oil smoke generated from the cooking utensils, dust floating around the cooking utensils, etc. above the cooking utensils (not shown). A hood 102 is installed on a wall surface 103. The hood 102 is provided with a discharge port 105 on the top surface communicating with the outdoors via a duct 104, and an electric motor 107 having a rotating shaft 106 disposed substantially horizontally therein. An impeller 108 attached to the rotating shaft 106 and a cleaning casing 109 including the impeller 108 are disposed, and a ventilation path 110 connecting the suction port 101 and the discharge port 105 through the impeller 108 is formed. Further, a flat plate rectifying plate 111 is disposed in the vicinity of the suction port 101 of the hood 102.

  Below the cleaning casing 109, a water storage device 113 for storing the cleaning liquid 112 and a water supply pump 114 are provided. The cleaning casing 109 is provided with a water spray nozzle 115 connected from the water supply pump 114. A hole 116 is provided at the lower end of the cleaning casing 109. An opening / closing valve 117 for storing and discharging the cleaning liquid 112 is provided in the cleaning casing 109, and a drain tray 118 is formed below the opening / closing valve 117. .

  As shown in FIG. 14, the impeller 108 of the centrifugal fan includes a plurality of blades 120 erected on the main plate 119. Inside the impeller 108, a ring-shaped oil collecting mechanism 121 is provided from the blades 120 to 15. A plurality of sheets are attached at a distance of about [mm] and spaced in the direction of the rotating shaft 106.

  Hereinafter, the range hood will be described with reference to FIG.

  At the time of cleaning, a portion below the rotating shaft 106 of the impeller 108 is immersed in the cleaning liquid 112 supplied from the water storage device 113 in the cleaning casing 109. The impeller 108 and the oil collecting mechanism 121 are contaminated with the use of the range hood. By rotating the impeller 108 with the rotating shaft 106, the part to which dirt has adhered can be cleaned by immersing it in the cleaning liquid 112 (see, for example, Patent Document 1).

JP 2014-062710 A

  In such a conventional range hood, it has been difficult to clean up to the main plate portion of the impeller.

  This invention solves the said conventional subject, and it aims at providing the range hood which can also wash | clean the main plate part of an impeller.

  In order to achieve the above object, the present invention provides an impeller rotated by an electric motor, an oil collecting mechanism part integrally provided in the impeller, and a cleaning casing for immersing the oil collecting mechanism part in a cleaning liquid, A range for cleaning the impeller and the oil collecting mechanism by providing the cleaning casing with an on-off valve for storing and discharging the cleaning liquid, closing the on-off valve to store the cleaning liquid, and spraying the cleaning liquid onto the impeller In the hood, the impeller has a plurality of blades in a vertical direction with a main plate and a main plate having a conical surface inclined so as to rise as it goes from the outer circumferential direction of the circle to the central axis, At least an extending plate and a watering nozzle facing in the lateral direction to the outlet, and the watering nozzle is opposite to the rotating direction of the impeller on the extending plate and from a vertical plane of the rotating shaft. Next to the spray angle Provided so that the cleaning liquid can be sprayed between the two blades that meet each other, the spray angle seen from the same plane as the rotation axis can land the cleaning liquid sprayed on the main plate through the two adjacent oil collecting mechanisms In this way, the intended purpose is achieved.

  According to the present invention, an impeller that is rotated by an electric motor, an oil collecting mechanism unit that is provided integrally with the impeller, a cleaning casing for immersing the oil collecting mechanism unit in a cleaning liquid, and the cleaning casing, In the range hood provided with an on-off valve for storing and discharging the cleaning liquid, closing the on-off valve to store the cleaning liquid, and spraying the cleaning liquid onto the impeller to clean the impeller and the oil collecting mechanism. The main plate having a conical surface inclined so as to rise from the outer circumferential direction of the circle toward the central axis, and the main plate have a plurality of blades in the vertical direction, and the cleaning casing is at least lateral to the outlet The water spray nozzle has a spray angle that is opposite to the rotation direction of the impeller and viewed from the vertical plane of the rotation axis on the extension plate. Two shakes that fit It is provided so that the cleaning liquid can be sprayed between the two nozzles, and the spray angle viewed from the same plane as the rotation axis is provided so that the cleaning liquid sprayed to the main plate can be landed between two adjacent oil collecting mechanisms. Thus, the main plate portion of the impeller can be easily cleaned.

Sectional block diagram which shows the range hood of Embodiment 1 of this invention Types of impellers for the same range hood Front sectional view of the configuration of the impeller of the same range hood Configuration oblique view of the impeller of the same range hood Front sectional view of impeller showing angle at which linear flow path passing through blade of same range hood becomes maximum amount Impeller front cross-sectional view showing the minimum angle at which a straight flow path through the blade of the same range hood can exist Impeller front cross-sectional view showing the maximum angle at which a straight flow path through the blade of the same range hood can exist Casing configuration diagram of the same range hood Cross-sectional view from the direction perpendicular to the rotation axis showing the characteristics of the sirocco fan of the same range hood Side sectional view showing the angle that can be taken in the horizontal direction of the watering nozzle of the same range hood (vertical sectional view not including the rotating shaft of the casing at the nozzle position, A-A 'sectional view of FIG. 9) Cross section viewed from the direction perpendicular to the rotation axis showing the characteristics of the turbo fan of the same range hood Side cross-section block diagram (figure seen from A-A ') which shows the range hood of Embodiment 2 Side cross-sectional configuration diagram showing a conventional range hood The figure which shows the structure of the impeller and oil collection mechanism part of the same range hood Front cross-sectional configuration diagram showing the same range hood

  The range hood according to claim 1 of the present invention includes an impeller that is rotated by an electric motor, an oil collecting mechanism portion that is provided integrally with the impeller, and a cleaning casing that immerses the oil collecting mechanism portion in a cleaning liquid. A range for cleaning the impeller and the oil collecting mechanism by providing the cleaning casing with an on-off valve for storing and discharging the cleaning liquid, closing the on-off valve to store the cleaning liquid, and spraying the cleaning liquid onto the impeller In the hood, the impeller has a plurality of blades in a vertical direction with a main plate and a main plate having a conical surface inclined so as to rise as it goes from the outer circumferential direction of the circle to the central axis, At least an extending plate and a watering nozzle facing in the lateral direction to the outlet, and the watering nozzle is opposite to the rotating direction of the impeller on the extending plate and from a vertical plane of the rotating shaft. The injection angle Provided so that the cleaning liquid can be sprayed between the two blades in contact with each other, the spray angle seen from the same plane as the rotating shaft is between two adjacent oil collecting mechanisms, and the cleaning liquid sprayed to the main plate is landed This is a range hood that can be used.

  Thus, when cleaning the impeller with dirt attached thereto, if the cleaning liquid is sprayed from the watering nozzle while rotating the impeller, the sprayed cleaning liquid passes through the blade and reaches the vicinity of the rotation axis of the main plate. Water. When the water has landed, the dirt is peeled off by the spraying pressure of the cleaning liquid from the watering nozzle. Since the spraying direction of the cleaning liquid in the previous period is opposite to the rotation direction of the impeller, the energy of collision of the cleaning liquid with the dirt on the impeller becomes high, and it is effective in easily removing the dirt. In addition, since the main plate is rotating, water can be landed on the entire inner periphery of the main plate even if the watering nozzle and the jetting direction are fixed. Further, the cleaning liquid that has landed moves to the outer peripheral side while peeling off dirt on the main plate by the centrifugal force generated by the inclination of the main plate and the rotation of the impeller, and falls from the outer periphery of the main plate to the cleaning casing. . Thereby, the cleaning liquid is stored in the cleaning casing. In a state where the cleaning liquid is stored in the cleaning casing, the blade can be immersed in the cleaning liquid and cleaned by rotating the impeller.

  Therefore, the entire impeller including the main plate including the main plate, which is difficult to clean because the cleaning liquid does not spread and become wet simply by rotating the impeller in the stored cleaning casing with respect to the impeller accumulated with dirt. This makes it possible to clean, and not only prevents clogging but also keeps the aesthetic appearance clean. Moreover, since the watering nozzle is sprayed toward the main plate, it also has an effect of reducing water splash. Further, since the water spray nozzle faces the spray port downward, there is no residual water of the cleaning liquid at the spray port at the time of stop, and the effect of suppressing nozzle clogging due to the scale is also achieved.

  Moreover, the range hood of Claim 2 is equipped with the heater which raises water temperature upstream of the injection nozzle of the said watering nozzle.

  As a result, the cleaning liquid to be sprayed can be sprayed as hot water or heated steam. Therefore, the effect of promoting softening of the oil and enhancing the cleaning effect is exhibited.

  Moreover, the range hood of Claim 3 is provided so that the number may increase as it approaches the said main plate in the rotating shaft direction of an impeller when arrange | positioning the said watering nozzle on the said washing | cleaning casing.

  As a result, when the cleaning liquid is sprayed from the watering nozzle, the cleaning liquid collides with the contaminated surface at an acute angle. Therefore, the force to move the dirt from the contaminated surface works and the cleaning power is strengthened, so that the cleaning time is shortened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, in the first embodiment, the range hood 1 has a main body 2 installed on a wall surface 3 and a duct 5 connected to a discharge port 4 to communicate with the outdoors.
The main body 2 is a box provided with a hood portion 6 so as to collect oil smoke generated from the cooking utensil or dust floating around the cooking utensil (not shown). 7 is provided with a suction port 8, and the side surface 9 is provided with the discharge port 4.

  Inside the main body 2, a blower 11 having an impeller 10 and a cleaning device 12 for cleaning the impeller 10 are provided. As shown in FIG. 2, there are several types of impellers 10 such as a sirocco fan, a turbo fan, and a plate fan, and the present invention can be applied to any of these types. Fan). That is, the impeller 10 has a cage-type cylindrical shape.

  In addition to the impeller 10, the blower 11 includes a motor 13 that rotates the impeller 10 and a casing 14 that surrounds the impeller 10.

  As shown in FIGS. 3 and 4, the impeller 10 includes at least a plurality of blades 15, an annular side plate 16, and a circular main plate 17. The blade 15 is disposed so that both end portions are sandwiched between the side plate 16 located on the blower inlet 18 side of the blower 11 and the main plate 17 located on the motor 13 side.

  A plurality of the blades 15 are arranged in an annular shape on the outer peripheral portion on the main plate 17. That is, the blades 15 are arranged on the same circumference. The blade 15 is arranged with a gap so that the linear flow path from the outer periphery to the inner periphery of the impeller 10 does not interfere with the blade 15 within a predetermined angle range. That is, the first blade 19 which is one blade is arranged at a predetermined interval in the rotation direction with respect to the second blade 20 arranged adjacently.

  Further, the blade 15 forms an inlet at the inner peripheral side of the impeller 10 and an outlet at the outer peripheral side. The blade 15 is an arc-shaped plate so that a string connecting the inlet and the outlet can be drawn in a cross section perpendicular to the rotary shaft 21 of the impeller 10 (a cross section in which the rotary shaft is cut into a ring).

  As shown in FIG. 5, in the cross section perpendicular to the rotating shaft 21 of the impeller 10, the inlet of the second blade 20 is the inlet end point 22, and the outlet is the outlet end point 23. And a string 24 connecting the outlet end point 23 can be drawn. An angle on the rotation direction side formed by the string 24 and the tangent line 25 of the impeller 10 at the intersection of the string 24 and the outer periphery of the impeller 10 is defined as θ1. When the angle of the predetermined linear flow path is θ1, the amount of air passing through the linear flow path is maximized.

  Further, as shown in FIG. 6, the rotational direction side formed by a tangent line 26 drawn from the inlet end point 22 of the second blade 20 toward the outlet direction of the first blade 19 and a tangent line 27 at the intersection of the outer periphery of the impeller 10. And the tangent line 28 drawn from the outlet end point 23 of the second blade 20 toward the inlet of the first blade 19 and the outer periphery of the impeller 10 at the outlet end point 23 of the second blade 20 as shown in FIG. If the angle on the rotation direction side formed by the tangent line 25 is θ3, the predetermined angle range is within the range of θ2 to θ3.

  The main plate 17 is provided with a conical surface 29 that protrudes in the axial direction at the center and on the side plate 16 side with respect to the outer periphery. In other words, the impeller 10 also has a conical surface 29 that is inclined so as to rise from the outer peripheral direction of the circle toward the rotation shaft 21 that is the central axis.

  Further, a plurality of ring-shaped oil collecting mechanism portions 30 are attached to the inner peripheral portion of the impeller 10 at a certain distance from each other.

  The casing 14 shown in FIG. 8 is provided with the blower inlet 18 and the blower outlet 31.

  The casing 14 includes a scroll plate 32, a casing front plate 33, a casing back plate 34, a tongue portion 35, and an extension plate 36 provided on the extension of the scroll plate 32. An extension plate 37 provided on the extension of the tongue 35 is provided. In the casing 14, the extension plate 36 and the extension plate 37 are not essential.

  The casing front plate 33 and the casing back plate 34 are flat plates arranged with a gap corresponding to the height direction of the impeller 10.

  The scroll plate 32 is a curved plate that expands the air path toward the rotation direction of the impeller 10 around the tongue 35 on the outer periphery of the impeller 10. The extended plate 36 is a flat plate in which the scroll plate 32 is further extended to the blower outlet 31. The extension plate 37 is a flat plate extending from the tongue 35 to the blower outlet 31 from the counter-rotating direction side.

  Further, the scroll plate 32 is disposed over the main part of the side surface portion 38 of the casing 14. The side surface of the casing 14 occupies a range of about 300 degrees from the tongue portion 35 in the rotational direction of the impeller 10.

  The blower outlet 31 is formed in the side surface portion 38 of the casing 14 so as to be surrounded by the end portions of the casing front plate 33, the casing back plate 34, the extension plate 36, and the extension plate 37. When the extension plate 36 and the extension plate 37 are not provided, the casing front plate 33, the casing rear plate 34, the scroll plate 32, and the tongue 35 may be surrounded by the end portions.

  The casing 14 includes an orifice 39 at a substantially central portion of the casing front plate 33. The blower inlet 18 is in the inner periphery of the orifice 39. In FIG. 1, the motor 13 is disposed on the casing back plate 34 side. The impeller 10 is rotated from the motor 13 through the shaft 40.

  The casing 14 is arranged so that the casing front plate 33 and the casing rear plate 34 stand up inside the main body 2. In other words, the impeller 10 is arranged with the rotating shaft 21 sideways, and the blower outlet 31 is arranged toward the side of the main body 2 so that the blown air blown is in a substantially horizontal direction, that is, in the lateral direction. In this case, it is desirable that the extending plate 36 directed from the tongue portion 35 toward the blower outlet 31 has the blower outlet 31 side upward with respect to the tongue portion 35 side.

  The blower outlet 31 is connected to the outlet 4 of the main body 2. The blower inlet 18 opens inside the main body 2 and communicates with the suction port 8.

  The motor 13 includes a rotation speed sensor (not shown) and a current sensor (not shown), and detects the rotation speed and current value of the motor. This is because a Hall IC is preferable as the rotation speed sensor, and the cost is low and the accuracy is good.

  The cleaning device 12 includes a cleaning casing 50 that is also the casing 14 of the blower 11, a water storage device 52 that stores the cleaning liquid 51, a water supply pump 53, a watering nozzle 54, and a drain tray 55.

  The water storage device 52 is provided below the cleaning casing 50.

  The water supply pump 53 supplies the cleaning liquid 51 stored in the water storage device 52 to the watering nozzle 54 and is provided inside the main body 2.

  The watering nozzle 54 is provided in the cleaning casing 50.

  The cleaning casing 50 is a machine body that can store the cleaning liquid 51 when cleaning the blade 15 and the oil collecting mechanism 30, and is provided with a hole 56 at the lower end, and the cleaning liquid is contained in the cleaning casing 50 in the hole 56. An opening / closing valve 57 for storing and discharging 51 is provided, and a drain tray 55 is disposed below the opening / closing valve 57. The storage amount of the cleaning liquid 51 as the cleaning casing 50 may be as long as the blade 15 and part of the oil collecting mechanism 30 are immersed.

  FIG. 9 is a view through the casing front plate 33 when viewed from the vertical plane of the rotating shaft 21. As shown in FIG. 9, the watering nozzle 54 is disposed on the extension plate 36 of the cleaning casing 50 or disposed near the blower outlet 31 on the scroll plate 32, and viewed from the vertical plane of the rotating shaft 21. Is provided in a direction opposite to the rotation direction of the impeller 10 and in a direction in which the cleaning liquid 51 can be sprayed between two adjacent blades. Further, as shown in FIG. 10, the spray angle when viewed from the same plane as the rotating shaft 21 is provided so that the cleaning liquid 51 sprayed to the main plate 17 through the two adjacent oil collecting mechanisms 30 can be landed. Yes.

  Hereinafter, the spray angle of the watering nozzle 54 will be described in detail.

  As shown in FIG. 9, the spray angle θ <b> 4 of the water spray nozzle 54 as viewed from the vertical plane of the rotating shaft 21 (the angle formed by the spray extension line 58 of the water spray nozzle 54 and the tangent line 59 at the intersection of the spray extension line 58 and the outer periphery of the impeller 10. ) Takes a range larger than θ2 and smaller than θ3 shown in FIGS. 6 and 7, and when θ4 takes this angular range, the cleaning liquid 51 ejected from the water spray nozzle 54 is the first blade 19 and the second blade. 20 passes.

  The best angle is when the angle θ1 shown in FIG. 5 is taken, and when this value is taken, the cleaning liquid 51 sprayed from the watering nozzle 54 is the most, and the first blade 19 and the second blade 20 Pass between.

  FIG. 10 shows an injection angle θ5 with reference to the horizontal plane of the water spray nozzle 54 when viewed from the same plane as the rotary shaft 21 in the A-A ′ cross section of FIG. 9. The injection angle θ5 is smaller than the straight line 62 drawn from the outlet end point 60 of the oil collecting mechanism 30 closest to the watering nozzle 54 to the inlet end 61 of the oil collecting mechanism 30 on the motor 13 side and 90 An angle larger than 0 ° is set such that the sprayed cleaning liquid 51 can pass between the oil collecting mechanisms 30 and can land on the main plate 17.

  The watering nozzle 54 does not inject horizontally or upward, but injects downward. By doing in this way, it can prevent that the washing | cleaning liquid 51 remains in the injection outlet of the watering nozzle 54. FIG.

  In the above configuration, when the motor 13 (preferably a DC motor) is operated when oily smoke is generated during cooking, the impeller 10 rotates, and air containing oily smoke or dust is sucked from the suction port 8 and the main body. 2, after passing through the impeller 10, oil and dust collide with the ring-shaped oil collecting mechanism 30 and are collected. The air is discharged to the outside through the duct 5 through the discharge port 4.

  If this is repeated, oil and dust accumulate in the oil collecting mechanism 30, the blade 15 of the impeller 10, and the main plate 17, causing clogging, leading to a decrease in the amount of discharged air, and aesthetics being impaired. Will be. Therefore, the oil collecting mechanism 30, the blade 15 of the impeller 10, and the main plate 17 are cleaned.

  First, the motor 13 is stopped, the on-off valve 57 is closed, and the cleaning liquid 51 stored in the water storage device 52 is pumped up by the water supply pump 53 and supplied to the watering nozzle 54. It is assumed that the cleaning liquid 51 in the water storage device 52 is supplied in advance. Thereafter, when the cleaning liquid 51 is sprayed from the watering nozzle 54 while rotating the motor 13, the sprayed cleaning liquid 51 passes through the blade 15 and the oil collecting mechanism portion 30 and reaches the vicinity of the rotating shaft 21 of the main plate 17. When the water has landed, the dirt is peeled off by the spraying pressure of the cleaning liquid 51 from the watering nozzle 54. At this time, since the spraying direction of the cleaning liquid 51 from the water spray nozzle 54 is opposite to the rotation direction of the impeller 10, the collision energy of the cleaning liquid 51 with the dirt on the impeller 10 becomes high, and the dirt is easily removed. effective. Since the main plate 17 is rotating, even if the watering nozzle 54 and the jetting direction are fixed, water can be landed on the entire inner periphery of the main plate 17. Furthermore, the cleaning liquid 51 that has landed moves to the outer peripheral side while removing the dirt on the main plate 17 by the centrifugal force generated by the inclination of the main plate 17 and the rotation of the impeller 10, and falls from the outer periphery of the main plate 17 into the cleaning casing 50. To do. As a result, the cleaning liquid 51 is stored in the cleaning casing 50. In addition, by rotating the motor 13 with the cleaning liquid 51 stored in the cleaning casing 50, the entire circumference of the oil collecting mechanism 30 and the blade 15 of the impeller 10 are immersed in the cleaning liquid 51 and cleaned. The drainage and drying are performed by opening the on-off valve 57 and moving the cleaning liquid 51 to the drainage tray 55 and blowing it to blow.

  As described above, in addition to the oil collecting mechanism 30 and the blade 15 in which dirt is accumulated by a series of cleaning steps, the entire impeller 10 including the main plate 17 including the main plate 17 that is difficult to clean because the cleaning liquid 51 is not wet and spread only by the rotation of the impeller 10. Cleaning is possible, not only preventing clogging but also maintaining a beautiful appearance. Moreover, since the water spray nozzle 54 injects the washing | cleaning liquid 51 toward the main plate 17 side, ie, the casing back plate 34, there exists an effect which reduces the water splash to the air blower inflow port 18. FIG. Moreover, since the water spray nozzle 54 has the injection port facing downward, there is no remaining water of the cleaning liquid 51 to the injection port at the time of stop, and nozzle clogging due to the scale can be suppressed.

  Moreover, the cleaning liquid which the watering nozzle 54 injects by arrange | positioning the position of the watering nozzle 54 on the extension board 36, or arrange | positioning in the position close | similar to the blower blower outlet 31 on the scroll board 32 of the rotation direction side of the impeller 10. 51 can land in the cleaning casing 50 in the horizontal direction from the rotary shaft 21 to the back side, so that the cleaning liquid 51 hardly leaks from the blower outlet 31.

  Moreover, about the extension board 36 which faces the blower outlet 31 from the tongue part 35, if the blower outlet 31 side is located upwards with respect to the tongue part 35 side, the washing | cleaning liquid 51 scattered from the inside of the washing casing 50 will be wash | cleaned again. Guidance and recovery into the casing 50 are also possible.

  Although this embodiment has been described using a sirocco fan, the present invention can also be applied to other fans as described above. FIG. 11 shows a view seen from a vertical plane of the rotating shaft 21 when applied with a turbofan. Although the tongue portion 35 may be difficult to catch as compared with the sirocco fan, the water spray nozzle 54 is disposed on the scroll plate 32 on the rotation direction side from the blower outlet 31, and the spray angle θ 6 of the water spray nozzle 54 has a certain first blade 63. If the second blade 64 is the blade 15 arranged next to the reverse rotation direction, the range of θ2 to θ3 is taken as described above, and the best angle is the value of θ1. The angle seen from the same plane as the rotating shaft 21 also takes the same range as θ5 described above. The plate fan also takes the same form as the sirocco fan or turbo fan depending on the direction of rotation.

  In the present embodiment, a heater or the like for heating the cleaning liquid 51 supplied from the water supply pump 53 to the watering nozzle 54 may be mounted in front of the watering nozzle 54 so that the cleaning liquid 51 is sprayed as hot water or heating steam. . The cleaning liquid 51 that has reached a high temperature softens the oil stains and improves the fluidity of the oil. That is, the adhesion of the oil stains is reduced, so that the cleaning effect is further enhanced. A plurality of watering nozzles 54 may be arranged, and the spray shape may be not only a round shape but also a holocone or a slit. The watering nozzle 54 is movable and can spray the cleaning liquid 51 in a wider range. Also good. The water supply of the cleaning liquid 51 to the water storage device 52 may be at a high temperature, or may be performed by adding an additive such as a surfactant or an alkali salt. Further, the water supply to the water storage device 52 may be self-contained from the water supply, or the additive may be automatically charged. A plurality of holes 56 may be provided in the cleaning casing 50 in addition to the lower end portion of the cleaning casing 50.

  In the present embodiment, the blower including the casing 14 has been described. However, as the cleaning casing 50, the scroll plate 32, the casing front plate 33, the casing back plate 34, the tongue portion 35, and the extending plate 36 are used. And not all the extension plates 37 are necessarily provided. If the machine body is formed by the casing front plate 33, the casing back plate 34, the scroll plate 32 sandwiched between the casing front plate 33, the casing rear plate 34, and the extended plate 36 on which the watering nozzle 54 is installed so that the cleaning solution 51 can be stored at the time of cleaning, the cleaning solution 51. Can be sprayed, and the sprayed cleaning liquid 51 can be stored. In this case, the scroll plate 32 does not have to gradually expand the air path. This is because the blade 15 and part of the oil collecting mechanism 30 can be immersed in the cleaning liquid 51 as long as it surrounds the lower side of the rotating shaft 21 of the impeller 10. This is particularly applicable to plate fans.

(Embodiment 2)
FIG. 12 illustrates the number deviation when arranging a plurality of watering nozzles 54 having the characteristics described in the first embodiment. In the present embodiment, when a plurality of watering nozzles 54 are arranged, when the plurality of watering nozzles 54 are arranged in the direction from the casing front plate 33 to the casing rear plate 34 on the scroll plate 32, the number is increased as approaching the main plate 17 side. It is. The method of increasing the number can be realized by shifting the position on the scroll plate 32 in the rotation direction of the impeller 10.

  When the cleaning liquid 51 is sprayed from the water spray nozzle 54 in the above configuration, the cleaning liquid 51 collides with the contaminated surface at an acute angle. When the cleaning water collides sharply with the contaminated surface, the force to move the dirt from the contaminated surface works more and the cleaning power is strengthened. Therefore, cleaning can be performed in a shorter time.

  The range hood according to the present invention enables cleaning of the entire impeller including the main plate and maintains the aesthetic appearance of the impeller after cleaning, and can also be applied to a ventilator having a similar function.

DESCRIPTION OF SYMBOLS 1 Range hood 2 Main body 3 Wall surface 4 Ejection port 5 Duct 6 Hood part 7 Lower surface 8 Suction port 9 Side surface 10 Impeller 11 Blower 12 Cleaning device 13 Motor 14 Casing 15 Blade 16 Side plate 17 Main plate 18 Blower inlet 19 First blade 20 Two blades 21 Rotating shaft 22 Inlet end point 23 Outlet end point 24 Chord 25 Tangential line 26 Tangential line 27 Tangential line 28 Tangential line 29 Conical surface 30 Oil collecting mechanism 31 Blower outlet 32 Scroll plate 33 Casing front plate 34 Casing back plate 35 Tongue portion 36 Installation plate 37 Extension plate 38 Side surface 39 Orifice 40 Shaft 50 Cleaning casing 51 Cleaning liquid 52 Water storage device 53 Water supply pump 54 Sprinkling nozzle 55 Drain tray 56 Hole 57 Open / close valve 58 Injection extension line 59 Tangential line 60 Outlet end point 61 Inlet end point 62 Straight line 63 One blade 64 Second blade 101 Suction port 102 Hood 103 Wall surface 104 Duct 105 Discharge port 106 Rotating shaft 107 Electric motor 108 Impeller 109 Cleaning casing 110 Ventilation path 111 Rectifier plate 112 Cleaning liquid 113 Water storage device 114 Water supply pump 115 Water spray nozzle 116 Hole 117 Opening / closing Valve 118 Drain tray 119 Main plate 120 Blade 121 Oil collecting mechanism

Claims (3)

An impeller that is rotated by an electric motor, an oil collecting mechanism unit provided integrally with the impeller, a cleaning casing for immersing the oil collecting mechanism unit in the cleaning liquid, and the cleaning liquid stored in the cleaning casing In the range hood that provides an on-off valve, closes the on-off valve, stores the cleaning liquid, and sprays the cleaning liquid onto the impeller to wash the impeller and the oil collecting mechanism.
The impeller has a plurality of blades in a vertical direction in which the main plate and the main plate having a conical surface inclined so as to rise as it goes from the outer circumferential direction of the circle to the central axis,
The cleaning casing has at least an extension plate and a watering nozzle facing in the lateral direction to the outlet,
The sprinkling nozzle can inject the cleaning liquid between the two blades adjacent to each other on the extension plate, opposite to the rotation direction of the impeller and at an injection angle as viewed from a vertical plane of the rotation axis. A range hood provided such that the spray angle seen from the same plane as the rotation shaft can land the cleaning liquid sprayed on the main plate through the two adjacent oil collecting mechanisms. The range hood of Claim 1 provided with the heater which raises water temperature in the injection nozzle upstream of the said watering nozzle. The range hood according to claim 1, wherein a plurality of the watering nozzles are provided so as to increase in number as they approach the main plate in the direction of the rotation axis of the impeller when the plurality of watering nozzles are arranged on the cleaning casing.