A top suction type range hood

Abstract

A top suction type range hood, comprising a smoke exhaust interface, a casing, a lower opening smoke collecting cavity, a centrifugal fan, an oil screen and an oil cup, a flow guide ring with a circular arc cross section and an annular cavity with an open end in the axial direction, an oil discharge hole provided on the annular cavity, a smoke collecting hole provided on the top plate of the smoke collecting cavity, the oil screen in the shape of a cylinder with an open top end and an oil discharge hole provided on the bottom plate, the flow guide ring being connected with the smoke collecting hole and integrally formed with the smoke collecting cavity, the top plate of the smoke collecting cavity being attached to the front volute plate, the air outlet of the volute, the smoke exhaust hole and the smoke exhaust interface being sequentially communicated, the upper end of the oil screen being connected with the top plate of the smoke collecting cavity, the oil cup being detachably connected with the oil screen and the lower end of the oil screen extending into the oil cup, the centrifugal fan being horizontally arranged, the air inlet of the front volute plate being directly communicated with the oil collecting cavity, the flow guide ring serving as a residual oil collecting groove and then the oil entering the oil cup through the oil screen, the oil fume being effectively prevented from entering the space between the smoke collecting cover and the casing, and the inner surfaces of the smoke collecting cover and the casing being free from cleaning.

Description

Technical Field

[0001] This utility model relates to a range hood. Background Technology

[0002] The existing technology, Chinese Patent 201821517449.5, discloses a top-mounted range hood, which addresses the technical problems of large size and unsatisfactory performance of top-mounted range hoods. The top-mounted range hood includes: a fan housing, a fan assembly housed within the fan housing, and a smoke collection hood assembly connected to the fan housing; the smoke collection hood assembly has an air inlet with its opening facing downwards; the fan assembly includes an impeller assembly, which includes a first impeller and a second impeller. The problems are: large size, vertical fan placement, oil fumes entering the smoke collection hood and oil filter for separation, then entering the fan cabinet through the housing, and residual oil staining the inner surfaces of the smoke collection hood and housing. Utility Model Content

[0003] The purpose of this utility model is to provide a top-mounted range hood that features oil fumes entering the centrifugal fan directly after passing through the oil filter, and the smoke collection hood and the inner surface of the casing being free from pollution.

[0004] This utility model is implemented as follows: a top-mounted range hood, characterized in that it includes a smoke exhaust port, a housing, a bottom-opening smoke collection chamber, a centrifugal fan, an oil filter, and an oil cup.

[0005] The top plate of the casing is equipped with a smoke exhaust vent;

[0006] The centrifugal fan includes a volute, a guide ring, a centrifugal impeller, and a motor. The front volute of the volute has an air inlet hole, the diameter of which is larger than the diameter of the centrifugal impeller. The inner diameter of the guide ring is smaller than the diameter of the centrifugal impeller. The diameter of the air inlet hole is smaller than or equal to the outer diameter of the guide ring.

[0007] The guide ring has a circular arc cross-section and an annular cavity with an axial opening at one end. The annular cavity is provided with an oil drain hole.

[0008] The top plate of the smoke collection chamber is equipped with smoke collection holes;

[0009] The oil filter is cylindrical with an opening at the top and has an oil drain hole on the bottom plate;

[0010] The guide ring is connected to the smoke collection hole and integrally formed with the smoke collection chamber. The top plate of the smoke collection chamber is fitted with the front volute plate. The air outlet, smoke exhaust hole, and smoke exhaust interface of the volute are connected in sequence. The upper end of the oil screen is connected to the top plate of the smoke collection chamber. The oil cup and oil screen are detachably fitted, and the lower end of the oil screen extends into the oil cup.

[0011] The unique feature of the top-mounted range hood is that the oil filter is in the shape of an inverted frustum cone.

[0012] The unique feature of the top-mounted range hood is that the air inlet of the front volute is provided with a flange that extends into the guide ring.

[0013] The top-mounted range hood is characterized in that: the volute includes a surrounding plate, a front volute, an air outlet duct with an upper opening, and a rear volute; the rear volute is provided with a motor mounting hole; the upper opening of the air outlet duct is the air outlet of the volute.

[0014] The enclosure, front volute, and air outlet are integrally formed, and the rear volute and the top plate of the housing are integrally formed. The rear volute covers the rear end of the enclosure, and the smoke exhaust hole is connected to the air outlet of the volute. The motor extends into the volute through the motor mounting hole and is fixed to the top plate of the housing.

[0015] The top-mounted range hood is characterized in that: the motor is provided with a circular fixing plate, and the circular fixing plate is provided with connecting holes;

[0016] The screw passes through the connecting hole and engages with the top plate of the housing.

[0017] The top-mounted range hood described above is characterized by the fact that it also includes a heat dissipation protective cover with a lower opening.

[0018] The heat dissipation shield is fixed to the top plate of the casing, and the motor extends into the heat dissipation shield.

[0019] This utility model discloses a top-mounted range hood with a horizontally arranged centrifugal fan. The air inlet of the front volute plate is directly connected to the oil collection chamber. The guide ring serves as a residual oil collection trough, and then the oil enters the oil cup through the oil screen. This effectively prevents oil fumes from entering the space between the fume hood and the casing, and the inner surfaces of the fume hood and the casing do not require cleaning. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention.

[0021] Figure 2 This is a perspective view of the present invention.

[0022] Figure 3 This is one of the exploded perspective views of this utility model.

[0023] Figure 4 This is the second exploded perspective view of this utility model.

[0024] Figure 5 This is the third exploded perspective view of this utility model. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1 , Figure 2 , Figure 3 As shown, a top-mounted range hood includes a smoke exhaust port 1, a housing 2, a bottom-opening smoke collection chamber 3, a centrifugal fan 4, an oil filter 5, and an oil cup 6.

[0028] The top plate 21 of the casing 2 is provided with a smoke exhaust hole 211;

[0029] The centrifugal fan 4 includes a volute 41, a guide ring 42, a centrifugal impeller 43, and a motor 44. The front volute plate 411 of the volute 41 is provided with an air inlet 411A. The diameter of the air inlet 411A is larger than the diameter of the centrifugal impeller 43. The inner diameter of the guide ring 42 is smaller than the diameter of the centrifugal impeller 43. The diameter of the air inlet 411A is smaller than or equal to the outer diameter of the guide ring 42.

[0030] The cross-section of the guide ring 42 is arc-shaped, with an annular cavity that opens at one end axially, and an oil drain hole (not shown in the figure) is provided on the annular cavity;

[0031] The top plate of the smoke collection chamber 3 is provided with smoke collection holes;

[0032] The oil mesh 5 is a cylindrical shape with an open top and an oil drain hole on the bottom plate;

[0033] The guide ring 42 is connected to the smoke collection hole 31 and integrally formed with the smoke collection chamber 3. The top plate of the smoke collection chamber 3 is fitted with the front volute plate 41. The air outlet, smoke exhaust hole 211, and smoke exhaust interface 1 of the volute 41 are connected in sequence. The upper end of the oil screen 5 is connected to the top plate of the smoke collection chamber 3. The oil cup 6 is detachably fitted with the oil screen 5, and the lower end of the oil screen 5 extends into the oil cup 6. The centrifugal fan is horizontally arranged. The oil fumes enter the volute of the centrifugal fan 4 directly through the oil screen 5 and are then discharged through the smoke exhaust hole 211 and smoke exhaust interface 1. The smoke collection chamber is located on the inner surface of the casing, and there is no oil fume pollution inside the casing, achieving cleaning-free operation.

[0034] As a further improvement of this utility model, the oil mesh 5 is in the shape of an inverted frustum cone.

[0035] As a further improvement of this utility model: the air inlet 411A of the front volute 41 is provided with a flange 411B, which extends into the guide ring 42. With this structure, the excess oil in the volute is guided into the guide ring through the air inlet 411A and the flange 411B, and then enters the oil cup through the oil mesh.

[0036] As a further improvement of this utility model: the volute 41 includes a surrounding plate 412, a front volute 411, an air outlet 413 with an upper opening, and a rear volute. The rear volute is provided with a motor mounting hole 414; the upper opening of the air outlet duct is connected to the air outlet of the volute 41, or in other words: the upper opening of the air outlet duct is connected to the air outlet of the volute 41.

[0037] The enclosure 412, the front volute 411 and the air outlet 413 are integrally formed, the rear volute and the top plate of the housing 2 are integrally formed, the rear volute covers the rear end of the enclosure 412, the smoke exhaust hole 211 and the air outlet of the volute 41 are connected; the motor 44 extends into the volute 41 through the motor mounting hole 414 and is fixed to the top plate of the housing 2.

[0038] As a further improvement of this utility model: the motor 44 is provided with an annular fixing plate 441, and the annular fixing plate 441 is provided with a connecting hole;

[0039] The screw passes through the connecting hole and engages with the top plate of the housing 2.

[0040] As a further improvement of this utility model, it also includes a heat dissipation protective cover 7 with a lower opening;

[0041] The heat dissipation protective cover 7 is fixed to the top plate of the housing 2, and the motor 44 extends into the heat dissipation protective cover 7.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A top-mounted range hood, characterized in that: This includes the exhaust port, casing, bottom-opening smoke collection chamber, centrifugal fan, oil filter, and oil cup. The top plate of the casing is equipped with a smoke exhaust vent; The centrifugal fan includes a volute, a guide ring, a centrifugal impeller, and a motor. The front volute of the volute has an air inlet hole, the diameter of which is less than or equal to the outer diameter of the guide ring. The guide ring has a circular arc cross-section and an annular cavity with an axial opening at one end. The annular cavity is provided with an oil drain hole. The top plate of the smoke collection chamber is equipped with smoke collection holes; The oil filter is cylindrical with an opening at the top and has an oil drain hole on the bottom plate; The guide ring is connected to the smoke collection hole and integrally formed with the smoke collection chamber. The top plate of the smoke collection chamber is attached to the front volute plate. The air outlet, smoke exhaust hole and smoke exhaust interface of the volute are connected in sequence. The upper end of the oil screen is connected to the top plate of the smoke collection chamber. The oil cup and oil screen are detachably matched, and the lower end of the oil screen extends into the oil cup.

2. The top-mounted range hood according to claim 1, characterized in that: The oil mesh is in the shape of an inverted frustum.

3. A top-mounted range hood according to claim 1, characterized in that: The air inlet of the front volute is provided with a flange, which extends into the guide ring.

4. A top-mounted range hood according to claim 1, 2, or 3, characterized in that: The volute includes a surrounding plate, a front volute, an air outlet duct with an upper opening, and a rear volute. The rear volute is provided with a motor mounting hole; the upper opening of the air outlet duct is the air outlet of the volute. The enclosure, front volute, and air outlet are integrally formed, and the rear volute and the top plate of the housing are integrally formed. The rear volute covers the rear end of the enclosure, and the smoke exhaust hole is connected to the air outlet of the volute. The motor extends into the volute through the motor mounting hole and is fixed to the top plate of the housing.

5. A top-mounted range hood according to claim 4, characterized in that: The motor is provided with an annular fixing plate, and the annular fixing plate is provided with connecting holes; The screw passes through the connecting hole and engages with the top plate of the housing.

6. A top-mounted range hood according to claim 5, characterized in that: It also includes a heat dissipation protective cover with a lower opening; The heat dissipation shield is fixed to the top plate of the casing, and the motor extends into the heat dissipation shield.

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