JP4581797B2 - Range food - Google Patents

Description

  The present invention relates to a range hood that can be attached below a hanging cabinet that reliably discharges waste gas, oily smoke, odor, and the like generated during cooking to the outdoors.

  Conventionally, this type of range hood has been designed to reduce the pressure loss during piping, reduce the pressure loss during piping, and reduce waste gas generated during cooking in order to install exhaust ducts within the constraints of housing beam dimensions and ceiling height dimensions. There is a need to improve the collection efficiency of oil smoke and odors. Various devices designed for such a problem are known (see, for example, Patent Document 1).

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

  As shown in the figure, a main body 101 composed of a blower unit 102, an outer shell 103, an adapter 104, and a rectifying plate 105 is provided with a side plate 107 having an inclined surface 106 formed on the lower side of the main body 101. A horizontal portion 108 having a shape extending along the inclined surface 106 and an inclined portion 109 having a shape extending along the inclined surface 106 are provided. An intake port 110 is formed in the front and side narrower than the width of the main body 101, and an intake air flow is formed between the main body 101 and the upper surface. A rectifying plate 105 in which a path 111 is formed is provided, and an inclined portion 109 of the rectifying plate 105 is disposed closer to the main body 101 side than a height position of the inclined surface 106 of the side plate 107.

  The operation of the range hood configured as described above will be described.

The suction air velocity at the intake port 110 on the front side from the rear side of the main body 101 increases, so that the oil smoke rising along the rectifying plate 105 can be efficiently collected, and the thickness of the main body 101 can be reduced.
JP 2001-304642 A

  In such a conventional range hood of [Patent Document 1], because the main body is thinned while ensuring the collection performance, the blower blowing portion and the adapter are in the vicinity, so the position of the adapter cannot be changed. There is a problem that the pipe must be L-shaped from the adapter, and there is a problem that the air flow-static pressure characteristics deteriorate and noise increases due to increased pressure loss. In addition, the position of the adapter can be adjusted without deteriorating the air flow-static pressure characteristics. Although it is possible to provide a chamber between the blower outlet and the adapter so that it can be changed, there is a problem that the product thickness increases and the storage space decreases.

  The present invention solves such a conventional problem, and is required to improve the air flow-static pressure characteristics and noise characteristics while reducing the thickness of the collecting portion and securing a storage space.

In order to achieve the above object, the range hood of the present invention communicates with a collection part for collecting oil smoke, a suction port provided on the downstream side of the collection part, and a suction chamber disposed on the upper side of the collection part; A blower located downstream of the suction chamber and partitioned to include a turbofan and a motor, a suction wall separating the blower and the suction chamber, and the suction chamber and the blower to communicate with each other. An inlet provided in the suction wall; and an outlet that communicates with the inlet and exhausts air sucked by the blower. It is characterized by being formed larger than the area. The range hood of the present invention is characterized in that a lower sectional area of the suction chamber is larger than an upper sectional area thereof.

  In the range hood of the present invention, the suction chamber is arranged in front of the blower, the fan is a turbo fan, and the shaft of the motor is inclined with the suction chamber side downward. Features.

  In the range hood of the present invention, the suction chamber is arranged behind the blower, the fan is a turbo fan, and the shaft of the motor is inclined with the suction chamber side downward. Features.

  Moreover, the range hood of this invention arrange | positions the said suction chamber and the said air blower on the outer side rather than the center of the said collection part in the longitudinal direction of a cooking stand, and if the said air blower is arranged on the side side of the said collection part. In any case, the fan is a turbo fan, and the shaft of the motor is inclined with the suction chamber side downward.

  Moreover, the cooker hood of this invention arrange | positions the said suction chamber and the said air blower outside the center of the said collection part in the longitudinal direction of a cooking table, and arrange | positions the said suction chamber to the side side of the said collection part. In addition, the fan is a turbo fan, and the shaft of the motor is inclined with the suction chamber side downward.

  Further, the range hood of the present invention is characterized in that the shaft axis is inclined so that a side plate angle of the side plate with respect to the main plate of the turbofan is equal to an inclination angle of the shaft with respect to a horizontal plane.

  Further, the range hood of the present invention is characterized in that the fan is a turbo fan, and an air flow rectifying plate parallel to the main plate of the turbo fan is provided on the side opposite to the suction port of the turbo fan.

  In the range hood of the present invention, an opening is provided in the airflow rectifying plate, and a discharge chamber communicating with the opening is disposed downstream of the turbofan, so that exhaust from the turbofan directly to the outflow portion is performed. One exhaust path and a second exhaust path for exhausting air from the turbo fan to the outflow part through the discharge chamber are characterized.

  In the range hood of the present invention, an opening is provided in the air passage rectifying plate, and a discharge chamber communicating with the opening is provided at a subsequent stage of the turbofan, so that the exhaust path from the turbofan passes through the discharge chamber. And only having a path for exhausting to the outflow portion.

  Moreover, the range hood of this invention provided the inclined surface in the lower part of the ventilation unit comprised including the said suction chamber and the said air blower.

  Moreover, the range hood of the present invention is characterized in that a casing having two or more tongue portions and an outlet is provided around the turbofan.

  The range hood of the present invention is characterized in that the suction wall is composed of a suction port plane close to the inflow port and an enlarged surface in which the air path widens as it approaches the outflow portion.

  The range hood of the present invention is characterized in that a suction guide that is curved in the rotation direction of the fan is provided outside the fan in the suction chamber.

  The range hood of the present invention is characterized in that at least one stationary blade portion is provided around the inlet.

  The range hood of the present invention is characterized in that a partition portion for dividing the inside of the discharge chamber formed at the rear stage of the turbofan into at least two parts is provided.

  Further, the range hood of the present invention is characterized in that a step surface is provided so as to be below the inclined surface.

  In addition, the range hood of the present invention is characterized by including a dynamic pressure preventing means for preventing the dynamic pressure from the turbofan from being generated.

  Moreover, the range hood of this invention has the oil drain hole arrange | positioned so that the said inclined surface in the said air blower and the lower outer wall of the said air blower may be connected, The said oil drain which protruded in the said air blower The hole has an inner wall side cover with respect to the rotation direction of the fan.

  Further, the range hood of the present invention has an oil drain hole disposed so as to communicate the stepped surface in the blower and the lower outer wall of the blower, and the oil drain that protrudes into the blower The hole has an inner wall side cover with respect to the rotation direction of the fan.

  The range hood of the present invention is characterized in that the oil drain hole provided in the outer wall of the blower has an outer wall side cover in the counter-rotating direction of the fan.

  In the range hood of the present invention, the oil drain hole provided in the outer wall of the blower has a guide in the rotation direction of the fan.

  Moreover, the range hood of the present invention is characterized in that the oil drain hole is detachable from the blower.

  Moreover, the range hood of the present invention is characterized in that the oil drain hole has a rotational direction of attachment / detachment in one direction.

  In addition, the range hood of the present invention is characterized by including suction means for increasing the turning angle with respect to the centrifugal direction of the turbofan.

  The range hood of the present invention is characterized in that a convex orifice having a convex shape is disposed at the inlet.

  Further, the range hood of the present invention is characterized in that a return restraining portion that is a convex portion in a circumferential shape is disposed in a portion larger than the outer diameter of the fan in the discharge chamber of the suction wall.

  Further, the range hood of the present invention is characterized in that a leakage suppressing portion is provided between the convex orifice and the side plate to maintain a certain clearance with respect to the side plate.

  The range hood of the present invention is characterized in that an opening for communicating the convex orifice and the discharge chamber is provided at the lowermost portion of the leakage suppressing portion.

  According to the present invention, a range hood capable of reducing the pressure loss of the air passage and improving the air volume-static pressure characteristics and noise characteristics while reducing the thickness of the collecting portion so that the occupant does not feel pressure. Can provide.

  Moreover, by reducing the turbulence in the suction chamber, it is possible to provide a range hood that can improve the air volume-static pressure characteristics and noise characteristics while reducing the adhesion of oil in the chamber.

  In addition, it is possible to provide a range hood having a structure in which a fan, a motor, and the like in the blower can be easily taken.

  Moreover, the range hood which oil does not accumulate inside an air blower can be provided.

  Moreover, the range hood which can take out the oil inside an air blower smoothly out of an air blower can be provided, reducing the wind leak from a fan.

  Moreover, the range hood which can maintain an oil drain hole easily can be provided.

  Moreover, the range hood which can attach an oil drain hole to the intended position can be provided.

  Moreover, the range hood which can improve an air volume-static pressure characteristic and a noise characteristic can be provided by reducing that the air in the air blower pressurized by the fan returns to a suction chamber.

The cooker hood according to claim 1 of the present invention communicates with a collection part for collecting oil smoke, a suction port provided on the downstream side of the collection part, and a suction chamber disposed on the upper side of the collection part, A blower located downstream of the suction chamber and partitioned including a turbo fan and a motor, a suction wall separating the blower and the suction chamber, and the suction chamber and the blower to communicate with each other An inlet provided in the suction wall; and an outflow portion that communicates with the inlet and exhausts air sucked by the blower, and defines a sectional area of the upper part of the partitioned blower as a lower sectional area. It is characterized by the fact that it is formed larger, reducing the loss from the fan to the outflow part, making the blower thinner, ensuring storage space, etc., and improving the air volume-static pressure characteristics and noise characteristics. It can be. The range hood according to claim 2 of the present invention is characterized in that the lower cross-sectional area of the suction chamber is formed larger than the upper cross-sectional area, and the suction port of the suction chamber is maximized and the inflow air velocity is increased. Reducing the dynamic pressure, reducing the turbulence by reducing the cross-sectional area of the suction chamber along with the air sucked in at the inflow port, making the collection part thinner and securing the storage space etc. -Static pressure characteristics and noise characteristics can be improved.

  According to a third aspect of the present invention, in the range hood according to the first or second aspect, the suction chamber is disposed in front of the blower, the fan is a turbo fan, and the shaft of the motor is connected to the suction chamber side. It is characterized by being inclined downward, so that oil or the like adhering to the fan can easily flow down from the fan when the fan is stopped, and the fan can be easily removed during maintenance.

  According to a fourth aspect of the present invention, in the range hood according to the first or second aspect, the suction chamber is arranged behind the blower, the fan is a turbo fan, and the shaft of the motor is located on the suction chamber side. It is characterized by inclining downward, and oil that adheres to the fan easily flows down from the fan when the fan is stopped, and there is a suction port along the wall surface. The backside collection can be improved.

  According to a fifth aspect of the present invention, in the range hood according to the first or second aspect, the suction chamber and the blower device are arranged outside the center of the collection unit in the longitudinal direction of the cooking table, and the collection unit The air blower is arranged on the side of the fan, the fan is a turbo fan, and the shaft of the motor is inclined with the suction chamber side facing downward, and the collecting unit The space on the upper surface can be used effectively, and the fan can be easily removed during maintenance.

  A sixth aspect of the present invention is the cooker hood according to the first or second aspect, wherein the suction chamber and the blower device are arranged outside the center of the collecting part in the longitudinal direction of the cooking table, and the collecting part The suction chamber is arranged on the side of the suction chamber, the fan is a turbo fan, and the shaft of the motor is inclined with the suction chamber side facing downward, and the collecting portion The space on the upper surface can be used effectively, and the collection on the back surface can be improved at the time of collection because there is a suction port along the wall surface.

  A seventh aspect of the present invention is the range hood according to any one of the third to sixth aspects, wherein the side plate angle of the side plate with respect to the main plate of the turbofan is equal to the inclination angle of the shaft with respect to a horizontal plane. The shaft is inclined, and the fan can be easily removed during maintenance without increasing the depth of the suction chamber.

  According to an eighth aspect of the present invention, in the range hood according to any one of the first to seventh aspects, the fan is a turbo fan, and is parallel to the main plate of the turbo fan on the side opposite to the suction port of the turbo fan. The air flow straightening plate is provided, and the air blown out from the turbofan is guided to the outlet without any disturbance, so that pressure loss and noise can be reduced.

  According to a ninth aspect of the present invention, in the range hood according to the eighth aspect, an opening is provided in the air flow rectifying plate, and a discharge chamber communicating with the opening is disposed at a subsequent stage of the turbo fan, whereby the turbo fan is provided. A first exhaust path for exhausting directly from the exhaust to the outflow section and a second exhaust path for exhausting from the turbo fan to the outflow section via the discharge chamber. Since the pressure decreases, the air volume-static pressure characteristics can be improved and noise can be reduced.

  According to a tenth aspect of the present invention, in the range hood according to the eighth aspect, an opening is provided in the air passage rectifying plate, and a discharge chamber that communicates with the opening is disposed at a subsequent stage of the turbofan, thereby providing an exhaust path. It has only a path for exhausting from the turbo fan to the outflow part via the discharge chamber, and before the oil droplets blown out from the turbo fan blow out from the outlet, It can collide with the inner surface and be recovered.

  An eleventh aspect of the present invention is the range hood according to any one of the first to tenth aspects, wherein an inclined surface is provided at a lower portion of a blower unit including the suction chamber and the blower. The oil droplets collected inside the blower can be collected at one place or a plurality of places.

  According to Claim 12 of the present invention, in the range hood according to any one of Claims 3 to 11, a casing having two or more tongue portions and an outlet is provided around the turbofan. And while improving the static pressure characteristic of the turbofan, the oil droplets blown out from the turbofan can collide with the inner surface of the casing and be recovered before blowing out from the outlet.

  A thirteenth aspect of the present invention is the range hood according to any one of the first to twelfth aspects, wherein the suction wall includes an inlet plane that is close to the inlet and an enlarged surface that expands the air passage as the outlet portion is approached. Since the dynamic pressure is reduced by expanding the air passage, the air volume-static pressure characteristics can be improved and the noise can be reduced.

  According to a fourteenth aspect of the present invention, in the range hood according to any one of the first to thirteenth aspects, a suction guide that is curved in a rotation direction of the fan is provided outside the fan in the suction chamber. By improving the dead water area generated in the suction chamber and reducing vortices, it is possible to improve the air volume-static pressure characteristics and reduce noise.

  According to a fifteenth aspect of the present invention, in the range hood according to any one of the first to fourteenth aspects, at least one stationary blade portion is provided around the inflow port, and at least around the inflow port. It is characterized in that a single vane portion is provided, and is generated by interference with the turbofan by moving the location of the vortex generated on the inlet to a location away from the inlet. Noise can be reduced.

  According to a sixteenth aspect of the present invention, in the range hood according to the ninth, tenth, or twelfth aspect, a partition portion that divides the inside of the discharge chamber formed at the rear stage of the turbofan into at least two is provided. The flow rate-static pressure characteristics can be improved by rectifying the flow in the discharge chamber and improving the left-right balance in the discharge chamber.

  According to a seventeenth aspect of the present invention, in the range hood according to the eleventh aspect, a step surface is provided so as to be below the inclined surface, and the step hood is collected inside the blower. Oil drops can be collected in one place or multiple places.

  According to claim 18 of the present invention, in the range hood according to claim 11, there is provided dynamic pressure preventing means for preventing dynamic pressure from the turbofan from being emitted, and wind leakage from the fan is provided. The oil inside the blower can be smoothly taken out of the blower while reducing the amount of oil.

  According to a nineteenth aspect of the present invention, in the range hood according to the eleventh aspect of the present invention, the range hood has an oil drain hole disposed so as to communicate the inclined surface in the blower and the lower outer wall of the blower. The oil drain hole projecting into the device has an inner wall side cover with respect to the rotation direction of the fan, and the oil inside the blower device is reduced while reducing air leakage from the fan. It can be taken out of the blower smoothly.

  According to a twentieth aspect of the present invention, in the range hood according to the eleventh aspect of the present invention, the range hood according to the eleventh aspect has an oil drain hole disposed so as to communicate the stepped surface in the blower and the lower outer wall of the blower, and the blower The oil drain hole protruding into the device has an inner wall side cover with respect to the rotation direction of the fan, and the oil inside the blower device is reduced while reducing wind leakage from the fan. It can be taken out of the blower smoothly.

  According to a twenty-first aspect of the present invention, in the range hood according to the nineteenth or twentieth aspect, the oil drain hole provided in the outer wall of the blower has an outer wall side cover in the counter-rotating direction of the fan. Therefore, oil inside the blower can be smoothly taken out of the blower while reducing wind leakage from the fan.

  According to a twenty-second aspect of the present invention, in the range hood according to the nineteenth or twentieth aspect, the oil drain hole provided in the outer wall of the blower device has a guide in the rotation direction of the fan. The oil inside the blower can be smoothly taken out of the blower while reducing wind leakage from the fan.

  According to a twenty-third aspect of the present invention, in the range hood according to the nineteenth or twenty-second aspect, the oil draining part is detachable from the blower, and the oil draining part is easily maintained. Can be done.

  According to a twenty-fourth aspect of the present invention, in the range hood according to the nineteenth or twenty-second aspect, the oil drainage portion is configured such that the rotational direction of the attachment / detachment is one direction, and the position where the oil drainage portion is intended. Can be attached to.

Claim 25 of the present invention is the range hood according to any one of claims 1 to 16, characterized by comprising suction means for increasing the turning angle with respect to the centrifugal direction of the turbofan,
By reducing the turbulence in the suction chamber, it is possible to provide a range hood capable of improving the air flow-static pressure characteristics and noise characteristics while reducing the adhesion of oil in the chamber.

  According to a twenty-sixth aspect of the present invention, in the range hood according to the first to sixteenth aspects, a convex orifice having a convex shape is disposed at the inflow port, and turbulence in the suction chamber is reduced. By doing so, the range hood which can improve an air volume-static pressure characteristic and a noise characteristic can be provided, reducing the adhesion of the oil in a chamber.

  According to a twenty-seventh aspect of the present invention, in the range hood according to the first to sixteenth aspects, there is provided a return suppressing portion that is a convex portion in a circumferential shape in a portion larger than the outer diameter of the fan in the discharge chamber of the suction wall. The air volume-static pressure characteristic and the noise characteristic can be improved by reducing the return of the air in the blower apparatus pressurized by the fan to the suction chamber.

  According to a twenty-eighth aspect of the present invention, in the range hood according to the twenty-seventh aspect, a leakage suppressing portion is provided between the convex orifice and the side plate to maintain a certain clearance with respect to the side plate. The air volume-static pressure characteristics and the noise characteristics can be improved by reducing the return of the air in the air blower pressurized by the fan to the suction chamber.

  According to a twenty-ninth aspect of the present invention, in the range hood according to the twenty-eighth aspect, an opening for communicating the convex orifice and the discharge chamber is provided at a lowermost portion of the leakage suppressing portion. A range hood in which oil does not accumulate inside the apparatus can be provided.

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

(Embodiment 1)
FIG. 1 is a side sectional view showing the structure of the range hood of the present invention. FIG. 2 is a side sectional view of a turbo fan in the range hood of the present invention. FIG. 3 is a front sectional view showing the structure of the range hood of the present invention. FIG. 4 is a side cross-sectional view for improving the collection performance of the range hood of the present invention. FIG. 5 is a front sectional view showing a configuration for improving the collection performance of the range hood of the present invention.

  As shown in FIG. 1, a collecting part 1 for sucking waste gas, oily smoke, water vapor, odor, etc. generated by cooking and the like, a suction chamber 2 on the upper surface of the collecting part 1, a fan 3 and a motor 4, and a sheet metal, etc. A blower 5 configured in the shape of a metal box, a suction port 6 for allowing the odor collected in the collection unit 1 to flow into the suction chamber 2 on the lower surface of the suction chamber 2, A suction wall 7 separating the blower 5, an inlet 8 having an orifice shape for smoothly sucking into the fan 3 in the suction wall 7, and an upper face of the blower 5 or at least one of the left and right surfaces by the blower 5. An outlet 9 for exhausting air and an adapter 104 having a rounded corner shape for communicating with the outside of the outlet 9 are provided. The adapter 104 has a shape that can be connected to a duct having a round shape or the like that is a path for exhausting air to the outside.

  As the shape of the suction chamber 2, the cross-sectional area of the lower surface with the suction port 6 is larger than the upper surface constituting the suction chamber 2. Moreover, as a shape of the air blower 5, the cross-sectional area of the upper surface is larger than the lower surface forming the air blower 5. The motor 4 is fixed to the air flow straightening plate 14 that is firmly attached to the air blower 5 with screws or the like so that the axis of the motor 4 is inclined with respect to the horizontal plane of the range hood main body 101 by the “inclination angle”. Has been. For this reason, the fan 3 is also installed so as to be inclined by the “inclination angle”, and the inlet 8 of the suction wall 7 is also installed so as to be inclined by the “inclination angle” with respect to the vertical plane. The air blown out from the fan 3 flows out through the discharge chamber 16 formed on the opposite side of the inlet of the fan 3 separated by the first exhaust path 15 and the air flow straightening plate 14 that flows out directly to the outlet 9. 9 is constituted by a second exhaust air passage 17 that flows out to the air.

  As shown in FIG. 2, the fan 3 is constituted by a turbo fan 10, and the turbo fan 10 is constituted by a blade 13 so as to be sandwiched between the side plate 11 and the main plate 12, and the side plate 11 is located with respect to the horizontal plane of the main plate 12. It is inclined by “side plate angle”. This “inclination angle” is inclined so that the area around the outer diameter of the turbofan 10 is equal to the area around the inner diameter of the turbofan 10, and is usually inclined at about 10 °. The “tilt angle” in FIG. 1 is tilted so as to be equal to this “side plate angle”. The outside diameter of the turbo fan 10 is more than twice the diameter of the round hole of the adapter 104, and the axial width of the motor 4 of the fan 3 is ½ or less, and the air flow rate from 100 m3 per hour to 600 m3 per hour is 1300 rpm by the motor 4. It is realized by driving below the number of rotations.

  Next, the flow of wind will be described. As shown in FIG. 1, when a voltage is applied to the motor 4, a directly connected turbo fan 10 is driven, and waste gas, oily smoke, water vapor, and odor generated by cooking and the like are sucked from the collecting unit 1 having a negative pressure. Be turned. The airflow sucked in the collection unit 1 flows into the turbofan 10 through the orifice-shaped inlet 8 through the suction chamber 2, changes the direction of the airflow in the circumferential direction by the turbofan 10, and is almost uniform over the entire circumference. Blow out. The blown airflow flows along the air flow rectifying plate 14, and the air in the first exhaust passage 15 directly flowing into the adapter 104 and the air in the second exhaust passage 17 flowing into the adapter 104 from the air flow rectifying plate 14 through the discharge chamber 16. Merge in the vicinity of the adapter 104 and are discharged from the adapter 104. Here, since the cross-sectional area of the suction port 6 to the suction chamber 2 is larger than the average value of the areas obtained by adding the cross-sectional areas of the upper surface and the lower surface of the suction chamber 2, the inflow wind speed is reduced and the dynamic pressure is reduced. In addition, the cross-sectional area decreases from the suction port 6 toward the upper surface of the suction chamber 2, but the air flowing in from the suction port 6 flows into the turbofan 10 from the inlet 8, so the wind speed in the suction chamber 2 is Since the turbulence due to the wind speed fluctuation is reduced by averaging, the air volume-static pressure characteristics and the noise characteristics can be improved. Moreover, since the cross-sectional area of the outlet 9 of the blower 5 is larger than the average value of the areas obtained by adding the cross-sectional areas of the upper surface and the lower surface of the blower 5, the wind speed flowing out from the turbo fan 10 is reduced and the dynamic pressure is reduced. In addition, since the outlet 9 and the adapter 104 can be effectively connected, the air volume-static pressure characteristics and the noise characteristics can be improved while minimizing the blower 5.

  In addition, oily smoke or water vapor generated by cooking or the like becomes oil droplets and adheres to the inside of the blower 5. At this time, the oil droplets adhering to the turbofan 10 are repelled from the turbofan 10 by the centrifugal force of the turbofan 10 during operation, adhere to the wall surface in the blower 5 and adhere to the lower surface of the blower 5 by the weight of the oildrops. drop down. Further, the oil droplets attached to the motor 4 have no horizontal surface because the motor 4 is inclined by the “inclination angle”, and the oil droplets attached to the motor 4 fall on the lower surface of the blower 5 by its own weight. Moreover, the attachment surface of the adapter 104 has a shape arranged on any one of the upper surface, the left and right surfaces, and the rear surface of the blower 5.

  Next, the maintenance nonce of the turbo fan 10 will be described. The whole suction wall 7 or a part of the suction wall 7 including an inlet 8 having an orifice shape, and removing a portion larger than the area projected from the fan outer diameter of the turbo fan 10 in the shaft axial direction of the motor 4 is removed. 10 is removed from the motor 4. At this time, since the side plate 11 of the turbo fan 10 and the wall of the suction chamber 2 are parallel, the turbo fan 10 and the suction chamber 2 can be taken out without interference, and the depth of the suction chamber 2 can be minimized. It becomes. By minimizing the depth of the suction chamber 2, a space excluding the suction chamber 2 and the blower 5 is widened in the space above the collection unit 1, and this space can be used as a space for a supply fan or storage space. Can be effectively utilized. Here, as shown in FIG. 3, the suction chamber 2 and the blower 5 are arranged in the longitudinal direction of the cooking table 18, and the blower is placed on the side of the collection unit 1 that becomes the wall of the kitchen from the center of the collection unit 1. By arranging 5, the space can be effectively used as a design open kitchen, an air supply fan space, and a storage space.

  FIG. 4 is a side sectional view for improving the collection performance of the range hood of the present invention. Since the suction chamber 2 is arranged behind the blower 5, waste gas, oil smoke, water vapor, odor, and the like rising while drawing the wall surface of the kitchen by the Coanda effect are efficiently introduced into the suction chamber 2 and captured. It improves the collection efficiency. Here, as shown in FIG. 5, the suction chamber 2 and the blower 5 are arranged in the longitudinal direction of the cooking table 18, and the suction chamber is placed on the side of the collection unit 1 that becomes the wall of the kitchen from the center of the collection unit 1. By arranging 2, the space can be effectively used as a design open kitchen, an air supply fan space, and a storage space.

  With the above configuration, the air blower 5 is not incorporated into the collection unit 1, so that the thickness is reduced and the storage space of the kitchen is secured, but the mounting surface of the adapter is not limited, and the pressure loss in the air blower 5 is reduced. By reducing the airflow loss to a minimum, the generated noise can be reduced, and a range hood that collects oil with the blower 5 can be provided.

(Embodiment 2)
FIG. 6 is a side cross-sectional view showing details of the oil droplet recovery section in the range hood of the present invention. FIG. 7 is a side sectional view showing an oil droplet collecting structure in the range hood of the present invention. FIG. 8 is a front sectional view of a fan portion with a casing in the range hood of the present invention.

  As shown in FIG. 6, an inclined surface 19 is attached to the lower surface of the blower 5. For this reason, the oil droplets blown off and attached to the wall surface of the blower device 5 by the turbo fan 5 are accumulated on the lower surface of the blower device 5 along the wall surface of the blower device 5. It is possible to collect the oil generated by cooking or the like without a filter. Usually, the collected oil droplets are deposited on an oil catch or the like and discarded. The inclination angle of the inclined surface 19 is about 5 °. If there is an inclination of 1 ° or more, which is an angle through which oil droplets normally flow, it is regarded as the inclined surface 19.

  Further, as shown in FIG. 7, since the air discharged from the turbo fan 10 always passes through the discharge chamber 16, the air does not flow directly from the turbo fan 10 to the outlet 9, so that the oil droplets in the blower 5 It is possible to improve the recovery rate. In fact, when there is air flowing out from the turbofan 10 directly to the outlet 9, approximately 20% of the oil droplets flow out of the adapter 104, but by passing all the air discharged from the turbofan 10 through the discharge chamber 16, It is possible to reduce the rate of outflow from the adapter 104 to about 5% or less.

  Further, as shown in FIG. 8, by providing the turbo fan 10 with a casing 21 having at least two tongue portions 20 and outlets, oil droplet adhesion inside the casing 21 is increased and the wind speed is increased. As a result, it is possible to improve the static pressure characteristics while increasing the oil droplet recovery rate in the blower 5.

  With the above configuration, it is possible to provide a range hood that can be collected at one or a plurality of locations on the lower surface of the blower 5 while increasing the oil droplet recovery rate in the blower 5.

(Embodiment 3)
FIG. 9 is a front sectional view of a suction chamber portion showing a structure for rectifying the inside of the suction chamber of the range hood of the present invention. FIG. 10 is a side sectional view showing in detail the suction wall of the range hood of the present invention. FIG. 11 is a front sectional view of a discharge chamber portion showing a structure for rectifying the inside of the discharge chamber of the range hood of the present invention.

  As shown in FIG. 9, when the turbo fan 10 is curved in the rotation direction of the turbo fan 10 in the suction chamber 2 and viewed from the inlet 8, the left side of the suction chamber 2 is when the turbo fan 10 rotates clockwise. The suction guide 22 is disposed on the upper surface side or on the right upper surface side of the suction chamber 2 when the turbo fan 10 rotates counterclockwise. The suction guide 22 is in contact with the lower side of the height of the suction chamber 2 ½, and is in contact with the outer side of the horizontal center of the suction chamber 2, and is closest to the outer peripheral side of the inlet 8. It has a shape. Further, a stationary blade portion 23 is disposed in the vicinity where the suction guide 22 is closest to the outer peripheral side of the inlet 8 and on the outer peripheral side of the inlet 8.

  As shown in FIG. 9, most of the air flow in the suction chamber 2 is sucked into the inlet 8, but when the turbo fan 10 rotates clockwise, the upper left side of the suction chamber 2 or the turbo fan 10. When the rotation is counterclockwise, the upper right side of the suction chamber 2 becomes a dead water area, making it difficult for air to flow, and a large loss occurs. By arranging the suction guide 22 in such a dead water area so as to eliminate the space, the loss is reduced, and the air flow is attracted by the Coanda effect by the suction guide 22 and flows into the suction chamber 2 from the suction port 6. It becomes easy to be sucked into the inflow port 8. Further, by controlling the vortex generated in the vicinity of the inlet 8 by the stationary blade portion 23, the center of the vortex becomes the stationary blade portion 23, and the noise having the frequency generated by the interference of the vortex and the rotation of the blade 13 of the turbofan 10 is generated. The level can be reduced. This frequency is a frequency obtained by multiplying the result of multiplying the rotation speed of the turbo fan 10 by the number of blades 13 by 60, and a frequency that is an integral multiple of that frequency.

  As shown in FIG. 10, the suction wall 7 has a shape composed of a suction port plane 24 that is parallel to the turbofan 10 and an enlarged surface 25 that expands as it approaches the outlet 9. The enlarged surface 25 expands the air passage in the blower 5, thereby reducing the loss of dynamic pressure by enabling the opening area at the outlet 9, and reducing the dead water area in the suction chamber 2, And the space above the collection part 1 can be widely used by making the depth of the suction chamber 2 and the air blower 5 into the minimum.

  As shown in FIG. 11, the discharge chamber 16 is divided into at least two partitions 26. The partition portion 26 rectifies the left and right pressure balance in the discharge chamber 16 and the flow of air, thereby reducing the pressure loss in the discharge chamber 16 and improving the air volume-static pressure characteristics.

  With the above configuration, the flow of air in the suction chamber 2 and the blower 5 is rectified to reduce the pressure loss and improve the air volume-static pressure characteristics, while reducing the generation of noise, and the suction chamber 2 and the blower 5. The space above the collection part 1 can be widely used by minimizing the depth of.

(Embodiment 4)
FIG. 12 is a side sectional view showing details of the oil droplet recovery structure in the range hood of the present invention. FIG. 13 is a front sectional view showing details of the oil drain hole in the range hood of the present invention. FIG. 14 (a) is a perspective view showing attachment and detachment of the oil drainage part in the range hood of the present invention, FIG. 14 (b) is a sectional view taken along line XX ′ of the flange A, and FIG. It is YY 'sectional drawing of the flange B. FIG.

  As shown in FIG. 12, an oil dam portion 27 is arranged so as to be further below the inclined surface 19. The oil dam portion 27 causes oil droplets that are blown off and attached to the wall surface of the blower device 5 by the oil dam portion 27 to flow to the lower surface of the blower device 5 along the wall surface of the blower device 5, and the oil dam portion from the inclined surface 19. 27. The oil dam portion 27 has a structure in which an oil drain hole 28 is arranged, and oil collected by the blower 5 from the oil drain hole 28 and deposited on the oil dam portion 27 is reliably discharged from the main body 101. can do.

  As shown in FIG. 13, a wind guide 29 is disposed in the oil drain hole 28. The wind guide 29 is located on the upstream side of the flow A in the rotational direction of the turbo fan 10 in the oil drain hole 28, and the oil drain hole 28 is directly subjected to dynamic pressure by the wind flow A discharged from the turbo fan 10. Therefore, it is possible to reduce wind leakage due to dynamic pressure from the blower 5. In addition, oil is once dropped from the oil drain hole 28 to the oil lower guide 30, and the air leaking from the oil drain hole 28 is turned by the oil side guide 31 as the static pressure rises, and the oil in the lateral direction is directed downward. , And oil can be reliably discharged downward with respect to the oil drain hole 28.

  As shown in FIG. 14 (a), the oil drainage portion 32 composed of the oil drain hole 28, the wind guide 29, the oiled guide 30 and the oil side guide 31 has a flange A and a flange B. Is provided with protrusions A and B that are convex with respect to the flange surface. The protrusions A and B are adapted to coincide with the oil dam 27 or a small hole larger than the protrusions A and B opened in the inclined surface 19. Also, since the flange width A of the flange A and the flange width B of the flange B are in the relationship of flange width A <flange width B, the flange width A opened in the oil dam 27 or the inclined surface 19 It becomes possible to insert the flange A and the flange B into the flange opening A and the flange opening B, respectively, having the relationship of <flange opening A <flange width B <flange opening B. Further, as shown in FIG. 14B, AX> AX ′ in AX and AX ′ in the XX ′ cross section of the flange A, and YY ′ cross section of the flange B as shown in FIG. BY and BY ′ in FIG. 4 have a relationship of BY <BY ′, and the ZZ ′ section of the flange C has a relationship of CZ = CZ ′, and the upper point of CZ ′, the lower point of AX ′, and the upper side of CZ The distance between the point and the lower point of BY is larger than the thickness of the oil dam 27 or the inclined surface 19, and the upper point of CZ, the lower point of AX, and the upper point of CZ 'in the ZZ' section of flange C And the lower point of BY ′ have a relationship smaller than the thickness of the oil dam portion 27 or the inclined surface 19. As described above, the oil drainage portion 32 is inserted into the oil dam portion 27 or the flange opening A and the flange opening B opened in the inclined surface 19, respectively. B can rotate only on the BY side of B, and the projections A and B coincide with the oil dam portion 27 or the small holes larger than the projections A and B formed in the inclined surface 19, so that the wind guide 29 Can be positioned on the upstream side of the flow A in the rotational direction of the turbo fan 10 and is added to the downstream side of the flow A in the counter-rotating direction of the turbo fan 10 by mistake. It is possible to eliminate the mistake that leakage increases due to the influence.

(Embodiment 5)
FIG. 15 is a side sectional view showing details of an orifice portion in the range hood of the present invention. A convex orifice 33 is disposed at the inflow port 8, and on the turbofan 10 side of the convex orifice 33, the side plate 11 and the convex orifice 33 are within a range larger than the inner diameter of the side plate 11 and smaller than the convex outer diameter 34 of the convex orifice 33. The leakage suppressing portion 35 is arranged so as to be interposed between the two. In the leakage suppressing portion 35, an opening portion 36 for communicating the convex orifice 33 and the discharge chamber 16 is at the lowest end of the convex outer diameter 34. Further, a return restraining portion 37 having a rise in the shaft axial direction of the motor 4 from the suction wall 7 is arranged within a range larger than the outer diameter of the turbo fan 10 and smaller than the clearance between the suction wall 7 and the side plate 11. Yes. As a result, the air that attempts to return to the inlet 8 having a lower pressure than the discharge chamber 16 having a higher pressure is blocked by the return suppressing portion 37, and the clearance from the side plate 11 is reduced by the leakage suppressing portion 35. Leakage is reduced due to the large pressure loss that passes through. As a result, the air leakage from the discharge chamber 16 is eliminated, so that the performance of the blower 5 can be improved. Therefore, the output of the turbo fan 10 can be suppressed when a certain performance is satisfied.

  Further, by using the convex orifice 33, the turning angle 38 from the orifice to the turbo fan 10 can be increased, and the flow toward the side plate 11 can be made smooth. The turning angle 38 is an angle when the inflow direction and the outflow direction of the turbo fan 10 are viewed from the meridian plane when the inflow and outflow from the inlet 8 to the turbofan 10 along the suction wall 7. If the turning angle 38 is small, the inflowing air hardly flows along the side plate 11 and a vortex or the like is generated, resulting in a loss. Since the vortex can be reduced by increasing the turning angle 38, the entire blade 13 of the turbofan 10 performs work, so that the air volume-static pressure characteristics and noise characteristics can be improved. In order to increase the turning angle 38, it is appropriate to provide a straight pipe that does not cause pressure loss. However, when the space of the suction chamber 2 cannot be taken, the convex height of the convex orifice 33 and the shaft axis direction of the motor 4 of the blade 13 If the heights of these are equal, the same effect as that of a straight pipe that does not cause pressure loss is obtained, and this convex orifice 33 becomes effective. Further, the oil accumulated in the convex orifice 33 can be recovered from the opening 36 to the discharge chamber 16 and discharged from the oil drain hole 28 to the main body 101.

  The range hood according to the present invention can eliminate the restriction on the mounting surface of the adapter, does not deteriorate the air volume-static pressure characteristics and noise characteristics, and can reduce the thickness of the blower device. It is useful as a range hood that can widen the upper surface space of the collection unit and can efficiently collect oil droplets inside the blower.

Side surface sectional drawing of Embodiment 1 of this invention Side view of the turbo fan Front sectional view Side sectional view to improve the collection performance Front sectional view to improve the collection performance Side sectional view of Embodiment 2 of the present invention Side sectional view showing the oil droplet recovery structure Front sectional view of the fan part with the same casing Front sectional drawing of the suction chamber part of Embodiment 3 of this invention Side sectional view of the suction wall Side sectional view of the same discharge chamber Side surface sectional drawing of the oil dam part of Embodiment 4 of this invention Front sectional view of the oil drain Perspective view of the oil drain Side sectional view of Embodiment 5 of the present invention Side sectional view showing the structure of a conventional range hood

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Collection part 2 Suction chamber 3 Fan 4 Motor 5 Air blower 6 Suction port 7 Suction wall 8 Inlet 9 Outlet 10 Turbofan 11 Side plate 12 Main plate 13 Blade 14 Air path rectifying plate 15 First exhaust path 16 Discharge chamber 17 1st Two exhaust paths 18 Cooking table 19 Inclined surface 20 Tongue portion 21 Casing 22 Suction guide 23 Stator blade portion 24 Inlet port plane 25 Enlarged surface 26 Partition portion 27 Oil dam portion 28 Oil drain hole 29 Wind guide 30 Under oil guide 31 Oil side guide 32 Oil draining part 33 Convex orifice 34 Convex outer diameter 35 Leakage suppression part 36 Opening part 37 Return suppression part 38 Turning angle 101 Main body 102 Blower unit 103 Outer 104 Adapter 105 Current plate 106 Inclined surface 107 Side plate 108 Horizontal part 109 Inclined part 110 Air intake 111 Air intake flow path

Claims (29)

A collection unit for collecting oil smoke, a suction port provided on the downstream side of the collection unit, a suction chamber disposed on the upper side of the collection unit, and a turbofan located on the downstream side of the suction chamber; A blower that is partitioned to include a motor; a suction wall that separates the blower from the suction chamber; an inlet provided in the suction wall for communicating the suction chamber and the blower; and the inlet A range hood, comprising: an outflow portion through which air sucked by the blower is exhausted; and an upper cross-sectional area of the partitioned blower is formed larger than a lower cross-sectional area thereof. Range hood according to the cross-sectional area of the lower pre-Symbol suction chamber to Claim 1, characterized in that formed larger than the cross-sectional area of the upper. Disposing said suction chamber in front of the blower, range hood according to claim 1 or 2 shaft axis before SL motor and being inclined towards the suction chamber side downward. Arranging the suction chamber behind the blower, range hood according to claim 1 or 2 shaft axis before SL motor and being inclined towards the suction chamber side downward. The suction chamber to the outside than the center of the collector in worktops longitudinal and arranged the blower, with arranging the blower to the side end of the collecting portion, the shaft axis of the front SL motor The range hood according to claim 1 or 2, wherein the suction chamber side is inclined downward. In worktops longitudinal direction than the center of the collecting portion and the outside suction chamber arranged above the blower, with arranging the suction chamber-side of the collector, the shaft axis of the front SL motor The range hood according to claim 1 or 2, wherein the suction chamber side is inclined downward. The range hood according to any one of claims 3 to 6, wherein the shaft axis is inclined so that a side plate angle of a side plate with respect to a main plate of the turbofan is equal to an inclination angle of the shaft with respect to a horizontal plane. On the opposite side of the front SL turbo fan inlet, range hood according to claim 1, characterized in that provision of the air passage rectifying plate that is parallel to the main plate of the turbofan. An opening is provided in the air flow straightening plate, and a discharge chamber that communicates with the opening is provided downstream of the turbofan, so that the discharge from the turbofan and the first exhaust path that exhausts directly from the turbofan to the outflow portion. The cooker hood according to claim 8, further comprising a second exhaust path for exhausting air to the outflow portion via a chamber. A path for exhausting from the turbo fan to the outflow section via the discharge chamber as an exhaust path by providing an opening in the air flow rectifying plate and disposing a discharge chamber communicating with the opening in the subsequent stage of the turbo fan The cooker hood according to claim 8, characterized by comprising only The range hood according to any one of claims 1 to 10, wherein an inclined surface is provided at a lower portion of a blower unit including the suction chamber and the blower. The range hood according to any one of claims 3 to 11, wherein a casing having two or more tongue portions and an air outlet is provided around the turbo fan. The range hood according to any one of claims 1 to 12, wherein the suction wall is constituted by a suction port plane close to the inflow port and an enlarged surface in which an air passage expands toward the outflow portion. The range hood according to any one of claims 1 to 13, wherein a suction guide that is curved in a rotation direction of the fan is provided outside the fan in the suction chamber. The range hood according to any one of claims 1 to 14, wherein at least one stationary blade portion is provided around the inflow port. The turbofan of claim 9, 10 or 12 to the serial mounting of the range hood discharge chamber, characterized in that a partition portion for dividing into at least two formed in the subsequent stage. The range hood according to claim 11, wherein a step surface is provided on the lower side of the inclined surface. 12. The range hood according to claim 11, further comprising dynamic pressure preventing means for preventing dynamic pressure from the turbofan from being generated. There is an oil drain hole disposed so as to communicate the inclined surface in the blower and the lower outer wall of the blower, and the oil drain hole protruding into the blower is in the rotational direction of the fan. The range hood according to claim 11, further comprising an inner wall side cover. There is an oil drain hole arranged so as to communicate the stepped surface in the blower and the lower outer wall of the blower, and the oil drain hole protruding into the blower is in the rotational direction of the fan. The range hood according to claim 17 , further comprising an inner wall side cover. The range hood according to claim 19 or 20, wherein the oil drain hole provided in the outer wall of the blower device has an outer wall side cover in a counter-rotating direction of the fan. The range hood according to claim 19 or 20, wherein the oil drain hole provided in an outer wall of the blower device has a guide in a rotation direction of the fan. The range hood according to claim 19 or 22, wherein an oil draining part is detachably attached to the blower. 23. The range hood according to claim 19 or 22, wherein the oil drainage portion has a rotation direction for attachment and detachment in one direction. The range hood according to any one of claims 3 to 16, further comprising suction means for increasing a turning angle with respect to a centrifugal direction of the turbofan. The range hood according to claim 1, wherein a convex orifice having a convex shape is disposed at the inlet. The range hood according to claim 1, wherein a return restraining portion, which is a convex portion in a circumferential shape, is disposed in a portion larger than the outer diameter of the fan in the discharge chamber of the suction wall. 28. The range hood according to claim 27, further comprising a leakage suppressing portion that maintains a certain clearance with respect to the side plate between the convex orifice and the side plate. 29. The range hood according to claim 28, wherein an opening for communicating the convex orifice and the discharge chamber is provided at a lowermost portion of the leakage suppressing portion.

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