CN210662977U

CN210662977U - Side-draft range hood

Info

Publication number: CN210662977U
Application number: CN201920646349.0U
Authority: CN
Inventors: 张鲁涛; 胡承杰
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-06-02
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a formula range hood is inhaled to side, including casing and the fan of setting in the casing, the casing is including the backplate that is located the rear side, the fan includes the spiral case, sets up the impeller in the spiral case and be used for driving impeller pivoted motor, its characterized in that: the back plate is provided with air holes for air flow outside the range hood to enter the shell, and the fan is provided with an air flow passage for the air flow to enter the fan from the space between the rear side of the volute and the back plate so as to accelerate the air flow around the motor. Compared with the prior art, the utility model has the advantages of: through setting up the airflow path between the inside and outside of range hood and the airflow path between the outside of spiral case and the inside of impeller, can make the outside air strengthen the flow of motor surrounding air to reinforcing motor heat dispersion, reducing the motor temperature rise.

Description

Side-draft range hood

Technical Field

The utility model relates to an oil smoke clarification plant, especially a formula range hood is inhaled to side.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood of the top suction type utilizes the principle of hot gas rising to suck and discharge the naturally rising oil smoke generated during cooking, and has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like. The side-draft range hood utilizes the vortex wind pressure principle to absorb most of the oil smoke close to the cooking bench in an arc form, so that the adverse effect on the health of a human body can be reduced, and the suction effect of a power source cannot be reduced basically because the power source is close to the cooking bench.

The top-suction type range hood, as disclosed in the chinese patent with application number 201410704669.9, comprises a fume collecting hood with an air suction opening, a fume hood disposed at the upper part of the fume collecting hood, and a fan disposed in the fume hood and having a volute, wherein the fan discharges the gas in the fume hood and forms a negative pressure to suck the external oil fume into the fume hood, thereby achieving the purpose of sucking the oil fume; the side-draft range hood as disclosed in the chinese patent with application number 201520377321.3 comprises a housing, an air outlet assembly and an oil collecting tank separately disposed at the top and bottom of the housing, a fan assembly and an oil guide plate separately disposed in the upper portion and the lower portion of the housing, the fan assembly comprises a volute and a fan fixed in the volute, and the front face of the lower portion of the housing has a smoke inlet plate with a smoke inlet.

In both top-suction type and side-suction type range hoods, a motor is required to provide power to drive an impeller to form a negative pressure region, so that oil smoke is sucked into the range hood from the outside. In the running process of the motor, the temperature rise problem inevitably exists, which can cause the performance reduction of the motor and influence the service life of the motor. This problem is also the first problem that has always plagued the skilled person.

At present, a method for solving the motor temperature rise is not well adopted, and a common solution is to solve the motor temperature rise problem by adjusting motor parameters by a motor manufacturer. However, when the temperature rise of the motor sample sent by the motor factory does not reach the standard, the motor sample generally needs to be communicated with the motor factory for many times, and the motor factory is improved for many times, so that the motor meeting the performance requirement can be obtained, and the manpower, material resources and financial resources are consumed; even if the temperature rise of the motor samples sent by a motor factory reaches the standard, the mass production motors still have the possibility that more temperature rises do not reach the standard.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the problem that above-mentioned prior art exists, provide a formula range hood is inhaled to side, can strengthen motor heat dispersion, reduce the motor temperature rise, increase motor life.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a side-draught range hood, includes the casing and sets up the fan in the casing, the casing is including the backplate that is located the rear side, the fan includes the spiral case, sets up the impeller in the spiral case and be used for driving impeller pivoted motor, its characterized in that: the back plate is provided with air holes for air flow outside the range hood to enter the shell, and the fan is provided with an air flow passage for the air flow to enter the fan from the space between the rear side of the volute and the back plate so as to accelerate the air flow around the motor.

Preferably, the motor is structurally characterized in that the motor comprises a motor main body, a motor rear end cover and a motor front end cover, the motor rear end cover and the motor front end cover are arranged in a front-back mode, and the motor main body is located in the motor rear end cover and the motor front end cover.

In order to facilitate the installation of the motor, the motor further comprises a skirt edge, the skirt edge is arranged on the periphery of the whole formed by the rear end cover of the motor and the front end cover of the motor and is in an annular shape protruding outwards in the radial direction, a mounting hole for the motor to penetrate through is formed in the rear cover plate of the volute, and the skirt edge is located on the front side of the rear cover plate of the volute and is fixedly connected with the rear cover plate.

Preferably, in order to facilitate the air flow entering the volute, the volute of the fan comprises a rear cover plate, the air flow path comprises a mounting gap between the motor and the volute, and the mounting gap comprises a gap H1 between the skirt and the rear cover plate of the volute and in the axial direction of the motor, and a gap H2 between the rear end cover of the motor and the inner periphery of the mounting hole of the rear cover plate and in the radial direction of the motor.

In order to avoid influencing the flow of gas in the gap and the normal use of the range hood, the value ranges of H1 and H2 are as follows: 1.5mm < H1<15mm, 1.0mm < H2<12 mm.

In order to enhance the air flow around the rear end cover of the motor, the air holes are over against the rear end cover of the motor.

In order to avoid influencing the normal use of the range hood or playing an undesirable role, the total area of the air holes is A, and the value range of A is as follows: 0.012 x 3.14 x D < a <0.3 x 3.14 x D, where D is the diameter of the motor rear end cap.

In order to facilitate the gas to be discharged through the impeller, the impeller comprises a front disc, a rear disc and a plurality of blades arranged between the front disc and the rear disc, and the rear disc is provided with a through hole.

Preferably, on the basis of ensuring the normal work of the impeller, the gas is allowed to pass through as much as possible, the total area of the through holes is B, and B>90mm²。

For avoiding receiving the oil smoke interference, the spiral case of fan includes front shroud and back shroud, the casing is still including the roof that is located the top, the back shroud has the kink that is located the bottom and buckles towards the front shroud direction, the kink pastes tightly with the backplate, the top of back shroud then with the roof pastes tightly.

Compared with the prior art, the utility model has the advantages of: through setting up the airflow path between the inside and outside of range hood and the airflow path between the outside of spiral case and the inside of impeller, can make the outside air strengthen the flow of motor surrounding air to reinforcing motor heat dispersion, reducing the motor temperature rise.

Drawings

Fig. 1 is a schematic view of a side-draft range hood according to an embodiment of the present invention;

fig. 2 is a sectional view of the side-suction type range hood according to the embodiment of the present invention;

fig. 3 is a partial schematic view of a housing of the side-draft range hood according to the embodiment of the present invention;

fig. 4 is a schematic view of a fan of the side-suction range hood according to the embodiment of the present invention;

fig. 5 is a cross-sectional view of the fan of the side-suction range hood according to the embodiment of the present invention;

FIG. 6 is an enlarged view of a portion I of FIG. 5;

fig. 7 is a schematic view of a rear cover plate of a volute of a fan of a side-suction range hood according to an embodiment of the present invention;

fig. 8 is a schematic view of a motor of the side-suction range hood according to the embodiment of the present invention;

fig. 9 is a schematic view of an installation state of an impeller and a motor of a fan of the side-suction type range hood according to the embodiment of the present invention;

fig. 10 is a schematic view of the back disk of the impeller of fig. 9.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 3, a side-draft range hood includes a housing 1 and a panel 2 obliquely disposed on a front side of the housing 1. The panel 2 is provided with an air inlet 21, the smoke baffle 3 matched with the air inlet 21 in size is rotatably arranged on the panel 2, and the air inlet 21 can be opened or closed through rotating relative to the panel 2.

A fan 4 is arranged in the housing 1, and the fan 4 includes a volute 41, an impeller 42 arranged in the volute 41, and a motor 43 for driving the impeller 42 to rotate. An oil guide plate (not shown) may be disposed between the volute 41 and the panel 2, and an air inlet formed on the volute 41 and the oil guide plate corresponds to the air inlet 21 on the panel 2.

The housing 1 includes a back plate 11 at the rear side and a top plate 12 at the top, and in this embodiment, the back plate 11 may be integrally formed with the top plate 12. The rear bottom of the scroll 41 abuts the back plate 11.

Referring to fig. 2 to 10, the fan 4 is arranged obliquely, e.g. preferably in line with the inclination of the panel 2. The volute 41 includes a front cover plate 411, a rear cover plate 412 and a ring wall 413 connected between the front cover plate 411 and the rear cover plate 412, and the rear cover plate 412 is fixed to the back plate 11 by a bracket 414. The rear cover 412 has a bent portion 4121 at the bottom, which is bent from the top to the bottom toward the front cover 411, and can be closely attached to the back plate 11, and the top of the rear cover 412 is closely attached to the top plate 12, thereby closing the area between the rear side of the scroll casing 41 and the housing 1.

The motor 43 includes a motor body 431, a motor rear cover 432, a motor front cover 433, and a skirt 434. The motor rear cover 432 and the motor front cover 433 are arranged in the axial direction in front and rear, and the motor main body 431 is located inside the motor rear cover 432 and the motor front cover 433. A skirt 434 may be provided at the outer periphery of the whole of the motor rear end cover 432 and the motor front end cover 433, and it is in a radially outwardly protruding ring shape, and the skirt 434 is adapted to be mounted with the rear cover plate 412 of the scroll casing 41. A rear cover plate 412 of the scroll casing 41 is provided with a mounting hole 4122 through which the motor 43 passes. Bolts can be passed through the periphery of the mounting holes 4122 of the back cover plate 412 to screw-lock the skirt 434.

In order to form effective air flow around the motor 43, the back plate 11 is provided with a plurality of air holes 111 at positions opposite to the motor rear end cover 432, the total area of the air holes 111 is a, if the value a is too small, the effect cannot be achieved, and if the value a is too large, the normal use of the range hood is affected or the effect cannot be achieved, for example, the rigidity of the back plate 11 of the housing 1 is poor, the effective air flow around the motor 43 is reduced, and the like. Thus, preferably, the a range is: 0.012 x 3.14 x D < a <0.3 x 3.14 x D, where D is the diameter of the motor rear end cap 432. In the present embodiment, it is preferable that the airing hole 111 is a circular hole having a diameter of 5 mm. Therefore, the air flow outside the range hood can enter the space between the rear cover plate 412 of the volute 41 and the housing 1 through the ventilation holes 111.

The motor 43 is mounted to the impeller 42 through a back cover plate 412 of the volute 41. Skirt 434 of motor 43 is located at the front side of rear cover plate 412 of volute 41 (inside volute 41). A mounting gap through which an air flow passes is provided between the motor 43 and the scroll casing 41, a gap (distance between surfaces close to each other) between the skirt 434 and the rear cover plate 412 of the scroll casing 41 (which are parallel to each other) in the axial direction of the motor 43 is H1, and a gap (distance between surfaces close to each other) between the motor rear end cover 432 and the inner periphery of the mounting hole 4122 of the rear cover plate 412 of the scroll casing 41 in the radial direction of the motor 43 is H2. If the values of H1 and H2 are too small, the flow of gas in the gap is influenced, and if the values are too large, the normal use of the range hood is influenced, for example, the range hood has poor oil fume suction effect, the shaking of the whole range hood is intensified, the noise is increased, and the like. Thus, preferably, 1.5mm < H1<15mm, 1.0mm < H2<12 mm. Thus, the airflow entering between the rear side of the volute 41 and the housing 1 can sequentially enter the fan 4 through the mounting gap between the motor rear cover 432 and the inner periphery of the mounting hole 4122 of the volute, and the mounting gap between the skirt 434 and the rear cover plate 412 of the volute 41.

The impeller 42 includes a front disk 421, a rear disk 422, and a plurality of blades 423 disposed between the front disk 421 and the rear disk 422, and a middle of the rear disk 422 is used to mount the motor 43. The rear disk 422 is provided with a plurality of through holes 4221, and the through holes 4221 may be arranged at intervals in the circumferential direction. The total area of the through holes 4221 is B, which is preferable under the condition of ensuring the normal work of the impeller 42>90mm²And the larger the value, the better. Thus, the airflow entering from the installation gap between the rear cover plate 412 of the scroll casing 41 and the motor 43 can enter the impeller 42 through the through hole 4221, and is discharged from the scroll casing 41 to the outside. The mounting clearance between the rear cover plate 412 of the volute 41 and the motor 43 and the through hole 4221 in the rear disk 422 constitute a flow path through which the heat dissipation air enters the fan 4 to be discharged.

When the range hood normally works, the motor 43 drives the impeller 42 to rotate, so that gas is sucked into the volute 41 and then discharged out of the room. In the process, a small amount of airflow outside the range hood flows into the housing 1 through the air holes 111 of the back plate 11, then the air flows into the volute 41 through the installation gap between the volute 41 and the motor 43, then enters the impeller 42 through the rear disc 422 of the impeller 42, and the airflow is discharged out of the room in the rotation process of the impeller 42. Due to the air flow, a small amount of air flow exists around the motor rear end cover 432, so that the air flow around the motor rear end cover 432 can be accelerated, the heat dissipation performance of the motor 43 is enhanced, and the temperature rise of the motor 43 is reduced.

Claims

1. The utility model provides a side-draught range hood, includes casing (1) and fan (4) of setting in casing (1), casing (1) is including backplate (11) that are located the rear side, fan (4) are including spiral case (41), set up impeller (42) in spiral case (41) and be used for driving motor (43) that impeller (42) rotated, its characterized in that: the back plate (11) is provided with air holes (111) for allowing air flow outside the range hood to enter the shell (1), and the fan (4) is provided with an air flow passage for allowing the air flow to enter the fan (4) from the space between the rear side of the volute (41) and the back plate (11) so as to accelerate the air flow around the motor (43).

2. The side draft range hood according to claim 1, wherein: the motor (43) comprises a motor main body (431), a motor rear end cover (432) and a motor front end cover (433), the motor rear end cover (432) and the motor front end cover (433) are arranged in front and back, and the motor main body (431) is located inside the motor rear end cover (432) and the motor front end cover (433).

3. The side draft range hood according to claim 2, wherein: the motor (43) further comprises a skirt (434), the skirt (434) is arranged on the periphery of the whole body formed by the motor rear end cover (432) and the motor front end cover (433) and is in a ring shape protruding outwards in the radial direction, a mounting hole (4122) for the motor (43) to penetrate through is formed in the rear cover plate (412) of the volute (41), and the skirt (434) is located on the front side of the rear cover plate (412) of the volute (41) and is fixedly connected with the rear cover plate (412).

4. The side draft range hood according to claim 3, wherein: the volute (41) of the fan (4) comprises a rear cover plate (412), the airflow path comprises a mounting gap between the motor (43) and the volute (41), the mounting gap comprises a gap H1 between the skirt (434) and the rear cover plate (412) in the axial direction of the motor (43), and a gap H2 between the motor rear end cover (432) and the inner periphery of the mounting hole (4122) of the rear cover plate (412) in the radial direction of the motor (43).

5. The side draft range hood according to claim 4, wherein: the value ranges of H1 and H2 are as follows: 1.5mm < H1<15mm, 1.0mm < H2<12 mm.

6. The side draft range hood according to claim 2, wherein: the air holes (111) are opposite to a motor rear end cover (432) of the motor (43).

7. The side draft range hood according to claim 6, wherein: the total area of the air holes (111) is A, and the value range of A is as follows: 0.012 × 3.14 × D < a <0.3 × 3.14 × D, where D is the diameter of the motor rear end cap (432).

8. The side draft range hood according to claim 4, wherein: the impeller (42) comprises a front disc (421), a rear disc (422) and a plurality of blades (423) arranged between the front disc (421) and the rear disc (422), and the rear disc (422) is provided with a through hole (4221).

9. The side draft range hood according to claim 8, wherein: the total area of the through holes (4221) is B, and B>90mm²。

10. The side draft range hood according to claim 1, wherein: the volute (41) of the fan (4) comprises a front cover plate (411) and a rear cover plate (412), the shell (1) further comprises a top plate (12) located at the top, the rear cover plate (412) is provided with a bent portion (4121) located at the bottom and bent towards the front cover plate (411), the bent portion (4121) is attached to the back plate (11), and the top of the rear cover plate (412) is attached to the top plate (12).