A range hood

Abstract

A range hood includes a box assembly and a fan frame installed on the top of the box assembly, a fan is installed inside the fan frame, a smoke inlet is provided at the bottom of the box assembly, the lower part of the fan extends into the box assembly, the fan is a centrifugal fan having a front air inlet and a rear air inlet, and correspondingly, a front air inlet channel and a rear air inlet channel are formed inside the box assembly, the smoke inlet is fluidly connected with the front air inlet through the front air inlet channel, and the smoke inlet is fluidly connected with the rear air inlet through the rear air inlet channel. The lower part of the fan of the range hood extends into the box assembly, and the fan adopts a front and rear double air inlet structure. After the fan suction port is placed downward, the suction port is closer to the smoke inlet, which is conducive to improving the oil fume extraction effect. Therefore, the oil fume extraction effect can be guaranteed by adopting a thin fan system, thereby reducing the thickness of the entire box, making the product a thin range hood in appearance, which can reduce the risk of users hitting their heads and reduce the sense of aggression during use.

Description

Technical Field

[0001] The invention relates to a range hood. Background Art

[0002] There are many types of range hoods. According to the different positions of the fan installed in the casing, they can be divided into two types: fan-mounted type and fan-mounted type. That is, relative to the operation panel of the range hood, the fan is completely located above the operation panel, which is called a fan-mounted type, and the fan is completely located below the operation panel, which is called a fan-mounted type. The height design of the operation panel must be based on the height suitable for the user to operate conveniently. For example, the "Secondary Range Hood" disclosed in the Chinese Utility Model Patent No. ZL95202124.2 (authorization announcement No. CN2229615Y) and the "Range Hood with Kitchen Air Purification Function" disclosed in the Chinese Utility Model Patent No. ZL201120225844.8 (authorization announcement No. CN202133011U) both disclose a range hood with a fan-mounted type. This range hood has the advantage of a large operating space for the user and meets international safety standards. The disadvantage is that the distance between the fan system and the stove top is too far, and the oil fume extraction effect is poor. For example, the Chinese invention patent "Exhaust Hood" with application number ZL93100778.X (publication number CN1084263A) discloses a range hood with a fan placed below. Since the fan of this range hood is placed below and the height of the operation panel is fixed, the entire housing will extend downward along the operation panel. Therefore, the lower part of the housing is very close to the stove surface. Although the oil fume extraction effect is good, the noise is relatively large and the user's operation space is greatly reduced. In summary, the existing range hood structure needs to be further improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a range hood with a box body designed to be thin while ensuring the range hood absorbing effect in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the range hood comprises a box assembly and a fan frame installed on the top of the box assembly, a fan is installed inside the fan frame, and is characterized in that: a smoke inlet is provided at the bottom of the box assembly, the lower part of the fan extends into the box assembly, the fan is a centrifugal fan with a front air inlet and a rear air inlet, and correspondingly, a front air inlet channel and a rear air inlet channel are formed inside the box assembly, the smoke inlet is fluidly connected with the front air inlet through the front air inlet channel, and the smoke inlet is fluidly connected with the rear air inlet through the rear air inlet channel.

[0005] In order to overcome the defect of increased noise caused by the fan being placed downward, the distance between the front air inlet of the fan and the front side plate of the box assembly is smaller than the distance between the rear air inlet of the fan and the rear side plate of the box assembly. Accordingly, the rear air inlet channel constitutes the main air inlet channel, and the front air inlet channel constitutes the auxiliary air inlet channel. In this way, the rear air inlet channel is used as the main air inlet channel, and since the user stands in front of the range hood, the noise of the range hood becomes smaller for the user.

[0006] The box assembly can have a variety of structures, the box assembly includes a front side portion and a rear side portion, the total thickness of the front and rear side portions in the front-to-back direction is consistent with the front-to-back thickness of the fan rack, the rear side portion has a smoke inlet portion extending downward from the front side portion, the smoke inlet port is arranged on the front side of the smoke inlet portion, the smoke inlet port is strip-shaped and is arranged horizontally left and right.

[0007] Further preferably, the box assembly may be an integral one-piece structure, or the front side portion and the right side portion of the box assembly may be detachably connected together.

[0008] In order to improve the oil fume absorption effect, a smoke baffle is installed at the bottom of the front side of the box assembly. The smoke baffle extends horizontally forward from the box assembly, and the left and right widths of the smoke baffle are consistent with the left and right widths of the smoke inlet.

[0009] In order to guide the oil smoke into the rear air inlet channel as much as possible, a lower guide plate is installed in the smoke inlet portion, which can guide the oil smoke from the smoke inlet port into the rear air inlet channel.

[0010] The lower guide plate may have a variety of structures. Preferably, the lower guide plate is a flat plate that tilts obliquely from bottom to top and backward, and the shape of the lower guide plate is compatible with the shape of the smoke inlet.

[0011] In order to guide part of the oil smoke into the front air flow channel, an upper guide plate is installed inside the front side of the box assembly. The upper guide plate is located below the fan and is used to guide the oil smoke from the smoke inlet to the front air flow channel.

[0012] The upper guide plate and the lower guide plate can have a variety of different positional relationships. Preferably, the upper guide plate is a flat plate inclined upward from rear to front, and the upper guide plate is located above and in front of the lower guide plate. In addition, the lower guide plate and the upper guide plate are staggered with each other in the vertical direction and the front-to-back direction.

[0013] In order to smoothly guide the oil into the oil cup, oil leakage holes are opened on the left and right sides of the rear edge of the upper guide plate, and an oil guide plate is connected between the oil leakage hole and the inner wall of the smoke inlet part. Strip oil cups are arranged horizontally on the left and right sides below the lower guide plate, and the left and right ends of the strip oil cups are installed at the bottom of the smoke inlet part.

[0014] Further preferably, a smoke shield bracket for supporting the smoke shield is installed on the upper surface of the smoke shield, and the oil guide plates are provided on the left and right sides of the rear edge of the smoke shield bracket, and the oil guide plates are inclined downward from front to back.

[0015] Oil leakage ports are provided on the left and right sides of the rear edge of the upper guide plate, and oil guide plates are extended downward from the oil leakage ports. The oil guide plates are respectively in contact with the left inner wall and the right inner wall of the smoke inlet portion. Strip oil cups are arranged horizontally on the left and right sides below the lower guide plate, and the left and right ends of the strip oil cups are installed at the bottom of the smoke inlet portion.

[0016] In order to allow the oil smoke to be quickly captured by the fan system, a left air guide plate and a right air guide plate are respectively provided on the left and right sides of the inside of the box assembly. The left air guide plate and the right air guide plate are respectively located on the left and right sides of the lower part of the fan, and the left air guide plate and the right air guide plate are both inclined inward from bottom to top, thereby forming a smoke collecting channel that is wide at the bottom and narrow at the top between the left air guide plate and the right air guide plate.

[0017] Further preferably, sound-absorbing cotton is installed in the area enclosed by the upper part of the left air guide plate and the volute ring wall of the fan, and in the area enclosed by the upper part of the right air guide plate and the volute ring wall of the fan. In this way, the sound-absorbing cotton can absorb and reduce noise on the one hand, and buffer the airflow in this area on the other hand, and guide the oil smoke into the fan system.

[0018] As a preferred embodiment of any of the above schemes, a front air inlet ring and a rear air inlet ring are respectively installed at the front air inlet and the rear air inlet of the fan, a motor bracket is installed on the front air inlet ring, and the motor of the fan is installed on the motor bracket.

[0019] Compared with the prior art, the advantages of the present invention are: the lower part of the fan of the range hood extends into the interior of the box assembly, the fan is a centrifugal fan with a front air inlet and a rear air inlet, the smoke inlet is fluidly connected with the front air inlet through the front air channel inside the box, and the smoke inlet is fluidly connected with the rear air inlet through the rear air channel inside the box, so that the air suction port of the fan can be placed downward, the air suction port is closer to the smoke inlet, and the oil smoke is captured before it rises, which is beneficial to improve the oil smoke absorption effect, and the fan adopts a double air inlet channel, especially the rear air inlet channel is used as the main air inlet channel, which is beneficial to reduce the fan noise. In addition, after the fan is placed downward, since the oil smoke absorption effect is guaranteed, a thin fan system can be used, that is, the front and rear dimensions of the fan are small, which can reduce the thickness of the entire box, so that the product is a thin range hood in appearance, which can reduce the risk of users hitting their heads and reduce the sense of aggression during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the internal structure of an embodiment of the present invention from another angle;

[0023] Figure 4 A structural cross-sectional view of an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the oil guide structure of an embodiment of the present invention;

[0025] Figure 6 for Figure 5 Enlarged schematic diagram of part A. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 4 As shown, the range hood of this embodiment includes a box assembly and a fan frame 2 installed on the top of the box assembly, and a fan 3 is installed inside the fan frame 2. Figure 4 The direction indicated by the middle arrow B is the forward direction, and the lower part of the fan 3 extends into the interior of the box assembly 1. The fan 3 is a centrifugal fan having a front air inlet and a rear air inlet. Correspondingly, a front air inlet channel 5 and a rear air inlet channel 6 are formed inside the box assembly 1. Moreover, the distance between the front air inlet of the fan and the front side plate of the box assembly is smaller than the distance between the rear air inlet of the fan and the rear side plate of the box assembly. Accordingly, the rear air inlet channel 6 constitutes the main air inlet channel, and the front air inlet channel 5 constitutes the auxiliary air inlet channel.

[0028] The box assembly 1 of this embodiment includes a front side portion 100 and a rear side portion 101. The box assembly 1 can be an integral one-piece structure, or the front side portion 100 and the right side portion 101 can be detachably connected together. The total thickness of the front side portion 100 and the rear side portion 101 in the front-to-back direction is consistent with the front-to-back thickness of the fan frame 2. The rear side portion 101 has a smoke inlet portion 102 extending downward from the front side portion 100, and the front side opening of the smoke inlet portion 102 forms a smoke inlet, and the smoke inlet 4 is strip-shaped and arranged horizontally from left to right. The smoke inlet 4 is fluidly connected to the front air inlet of the fan 3 through the front air inlet channel 5, and the smoke inlet 4 is fluidly connected to the rear air inlet of the fan 3 through the rear air inlet channel 6.

[0029] A smoke baffle 7 is installed at the bottom of the front side 100 of the box assembly 1. The smoke baffle 7 extends horizontally forward from the box assembly 1, and the left and right widths of the smoke baffle 7 are consistent with the left and right widths of the smoke inlet 4. In addition, the periphery of the smoke baffle has a baffle extending upward. After the baffle is set, it not only plays an aesthetic role, but also prevents the items placed on the smoke baffle 7 from sliding off. For example, a seasoning bottle can be placed on the smoke baffle 7 to prevent the seasoning bottle from falling due to vibration when the range hood is turned on. For example, when cooking, electronic products such as mobile phones and tablets can be placed obliquely on the smoke baffle 7, so that you can also entertain yourself while cooking. In addition, the smoke baffle 7 can also expand the smoke collection area to ensure that some of the oil smoke that is not captured in time is within the smoke baffle area.

[0030] In this embodiment, a lower guide plate 8 is installed in the smoke inlet 102. The lower guide plate 8 is a flat plate that tilts obliquely from bottom to top and backward, and the shape of the lower guide plate 8 is adapted to the shape of the smoke inlet 4, that is, the lower guide plate is a rectangular structure, and the lower guide plate 8 is used to guide the oil smoke from the smoke inlet 4 to the rear air inlet channel 6. An upper guide plate 9 is installed inside the front side 100 of the box assembly 1. The upper guide plate 9 is located below the fan 3. The upper guide plate 9 is a flat plate that tilts obliquely from back to front and upward, and the upper guide plate 9 is used to guide the oil smoke from the smoke inlet 4 to the front air inlet channel 5. The upper guide plate 9 is located above and in front of the lower guide plate 8, and the inclination angle of the upper guide plate 9 relative to the horizontal is smaller than the inclination angle of the lower guide plate 8 relative to the horizontal plane. In addition, the lower guide plate 8 and the upper guide plate 9 are staggered with each other in the vertical direction and the front-to-back direction.

[0031] like Figure 5 and Figure 6 As shown, the oil guide structure of the range hood of this embodiment is as follows: an oil leaking port 91 is provided on the left and right sides of the rear edge of the upper guide plate 9, a smoke baffle support 71 for supporting the smoke baffle 7 is installed on the upper surface of the smoke baffle 7, and an oil guide sheet 72 is provided on the left and right sides of the rear edge of the smoke baffle support 71, and the oil guide sheet 72 is inclined downward from front to back, and the oil guide sheet 72 is connected between the oil leaking port 91 and the inner side wall of the smoke inlet 102, and a strip oil cup 11 arranged horizontally on the left and right is provided below the lower guide plate 8, and the left and right ends of the strip oil cup 11 are installed at the bottom of the smoke inlet 102. When the range hood is working, the separated oil in the fan 3 drips onto the upper guide plate 9, and the oil will flow along the upper guide plate 9 to the oil leaking port 91 on both sides of the rear part, and then flow into the strip oil cup 11 along the inner wall of the smoke inlet 102 through the oil guide sheets 72 on both sides.

[0032] A left air guide plate 12 and a right air guide plate 13 are respectively arranged on the left and right sides of the box assembly 1. The left air guide plate 12 and the right air guide plate 13 are respectively arranged on the left and right sides of the lower part of the fan 3, and the left air guide plate 12 and the right air guide plate 13 are both arranged obliquely inward from bottom to top, thereby forming a smoke collecting channel that is wide at the bottom and narrow at the top between the left air guide plate 12 and the right air guide plate 13. When the oil smoke passes through the smoke collecting channel, it can be accelerated to pass through, so that the oil smoke is accelerated to enter the fan system and be discharged outward. A grille net 18 is installed in the smoke collecting channel, and the grille net 18 can prevent foreign matter from being inhaled and filter the oil smoke. In addition, sound-absorbing cotton 14 is installed in the area enclosed by the upper part of the left air guide plate 12 and the volute ring wall of the fan 3, and in the area enclosed by the upper part of the right air guide plate 13 and the volute ring wall of the fan 3. After the sound-absorbing cotton 14 is arranged, it can absorb sound and reduce noise on the one hand, and on the other hand, it can buffer the airflow in this area and guide the oil smoke into the fan system.

[0033] In addition, the front air inlet and the rear air inlet of the fan are respectively installed with a front air inlet ring 15 and a rear air inlet ring 16, and a motor bracket 17 is installed on the front air inlet ring 15. The motor and impeller of the fan 3 can be detachably installed on the motor bracket 17. During assembly and disassembly, only the front panel of the box assembly 1 needs to be removed to clean the impeller and the volute, and the whole machine does not need to be disassembled, which is convenient for maintenance and assembly.

[0034] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two components or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a cover that allows fluid to flow through, or a combination of the above.

Claims

1. A range hood, comprising a housing assembly (1) and a fan frame (2) mounted on the top of the housing assembly, wherein a fan (3) is mounted inside the fan frame (2), characterized in that: The bottom of the box assembly (1) is provided with a smoke inlet (4), the lower part of the fan (3) extends into the interior of the box assembly (1), the fan (3) is a centrifugal fan having a front air inlet and a rear air inlet, and correspondingly, a front air inlet channel (5) and a rear air inlet channel (6) are formed inside the box assembly (1), the smoke inlet (4) is fluidically connected to the front air inlet via the front air inlet channel (5), and the smoke inlet (4) is fluidically connected to the front air inlet via the rear air inlet channel (6). The channel (6) is fluidically connected to the rear air inlet, the distance between the front air inlet of the fan and the front side plate of the box assembly is smaller than the distance between the rear air inlet of the fan and the rear side plate of the box assembly, accordingly, the rear air inlet channel (6) constitutes a main air inlet channel, the front air inlet channel (5) constitutes an auxiliary air inlet channel, and the box assembly (1) comprises a front side portion (100) and a rear side portion (101), the front and rear directions of the front and rear sides of the front and rear sides of the front and rear sides of the box assembly are The total thickness is consistent with the front and rear thickness of the fan frame (2); the rear side portion (101) has a smoke inlet portion (102) extending downward from the front side portion; the smoke inlet port (4) is arranged at the front side of the smoke inlet portion (102); the smoke inlet port (4) is strip-shaped and arranged horizontally from left to right; a lower guide plate (8) capable of guiding oil smoke from the smoke inlet port (4) to the rear air inlet channel (6) is installed in the smoke inlet portion (102); 00) is internally installed with an upper guide plate (9), the upper guide plate (9) being located below the fan (3), the upper guide plate (9) being used to guide the oil smoke from the smoke inlet (4) to the front air flow channel (5), the upper guide plate (9) being a flat plate inclined upward from the back to the front, the upper guide plate (9) being located above and in front of the lower guide plate (8), and the lower guide plate (8) and the upper guide plate (9) being staggered with each other in both the vertical direction and the front-to-back direction.

2. The range hood according to claim 1, characterized in that: A smoke baffle (7) is installed at the bottom of the front side portion (100) of the box assembly (1), and the smoke baffle (7) extends horizontally forward from the box assembly (1), and the left and right widths of the smoke baffle (7) are consistent with the left and right widths of the smoke inlet (4).

3. The range hood according to claim 1, characterized in that: The lower guide plate (8) is a flat plate that tilts obliquely from bottom to top and backwards, and the shape of the lower guide plate (8) is compatible with the shape of the smoke inlet (4).

4. The range hood according to claim 2, characterized in that: The upper guide plate (9) has oil leakage openings (91) on both sides of the rear edge thereof, and an oil guide plate (72) is connected between the oil leakage opening (91) and the inner wall of the smoke inlet portion (102). Strip-shaped oil cups (11) are arranged horizontally on the left and right sides below the lower guide plate (8), and the left and right ends of the strip-shaped oil cups (11) are mounted on the bottom of the smoke inlet portion (102).

5. The range hood according to claim 4, characterized in that: A smoke shield bracket (71) for supporting the smoke shield (7) is installed on the upper surface of the smoke shield (7), and the oil guide plates (72) are arranged on the left and right sides of the rear edge of the smoke shield bracket (71), and the oil guide plates (72) are inclined downward from front to rear.

6. The range hood according to claim 1, characterized in that: A left air guide plate (12) and a right air guide plate (13) are respectively arranged on the left and right sides of the interior of the box assembly (1); the left air guide plate (12) and the right air guide plate (13) are respectively located on the left and right sides of the lower part of the fan (3); and the left air guide plate (12) and the right air guide plate (13) are both arranged to be inclined inward from bottom to top, thereby forming a smoke collecting channel that is wider at the bottom and narrower at the top between the left air guide plate (12) and the right air guide plate (13).

7. The range hood according to claim 6, characterized in that: Sound-absorbing cotton (14) is installed in the area enclosed by the upper part of the left air guide plate (12) and the volute ring wall of the fan (3), and in the area enclosed by the upper part of the right air guide plate (13) and the volute ring wall of the fan (3).

8. The range hood according to claim 1, characterized in that: A front air inlet ring (15) and a rear air inlet ring (16) are respectively installed at the front air inlet and the rear air inlet of the fan (3); a motor bracket (17) is installed on the front air inlet ring (15); and the motor of the fan (3) is installed on the motor bracket (17).

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