Range hood with double fans

Abstract

The utility model discloses a range hood with double fans, which belongs to the technical field of range hoods, and comprises an upper fan and a lower fan which are arranged up and down, an inclined connecting pipe is arranged between the lower fan and the upper fan, and the lower fan and the upper fan are communicated with each other through the inclined connecting pipe. Oil fume sucked by the lower fan of the structure completely enters the upper fan through the inclined connecting pipe and is finally discharged from the upper fan, so that the problems of large noise and large flow resistance caused by random running of the oil fume in the range hood in the suction and discharge process can be avoided, the range hood works more silently, the oil fume suction and discharge efficiency is better, and the service life of the range hood is prolonged. The upper fan and the lower fan which are communicated with each other generate larger static pressure during working, the oil fume suction and exhaust effect is better, and meanwhile, the inclined connecting pipe is obliquely arranged, so that a flow guide effect can be achieved for flowing of the oil fume, the oil fume can flow in the inclined connecting pipe at a steepest curve, and the oil fume suction and exhaust speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood with double fans. Background Art

[0002] When the range hood is in use, the oil smoke needs to be discharged through resistance devices such as the exhaust pipe, check valve and exhaust channel. The existence of these resistance devices makes the oil smoke have a certain back pressure at the oil smoke exhaust port, and the existence of back pressure will greatly affect the exhaust flow of the range hood. In order to overcome the adverse effects of back pressure as much as possible, relevant technical personnel have developed a range hood with two fans in series, such as a series double-fan type range hood disclosed in the invention patent with Chinese patent number 201410119596.7. The series double-fan type range hood divides the fan cover into two upper and lower chambers, the main fan is installed in the lower chamber, and the secondary fan is installed in the upper chamber. The main fan is used to overcome the front-end resistance, that is, to overcome the resistance of the oil smoke filter device, oil guide plate, rectifier plate, smoke baffle plate, etc. set at the front end of the range hood, and the secondary fan is generally used to overcome the rear-end resistance, that is, to overcome the smoke pipe resistance set at the rear end of the range hood and the back pressure of the public flue. Although the smoke extraction effect can be improved by connecting two fans in series to increase the static pressure to overcome the adverse effects of back pressure, the two fans are placed entirely in the shell without any connection between them, causing the oil smoke to run around randomly in the lower and upper chambers and collide with the inner wall of the shell. This not only makes the range hood noisy when working, but also the oil smoke encounters a large resistance to flow in the lower and upper chambers, affecting the oil smoke extraction efficiency.

[0003] Therefore, further improvement is necessary. Utility Model Content

[0004] The utility model aims to provide a range hood with double fans to overcome the deficiencies in the prior art.

[0005] A range hood with dual fans designed for this purpose comprises an upper fan and a lower fan arranged up and down, wherein an inclined connecting pipe is provided between the lower fan and the upper fan, and the lower fan and the upper fan are connected to each other through the inclined connecting pipe.

[0006] The inclined connecting pipe is integrally arranged or formed by splicing a plurality of split components.

[0007] The inclined connecting pipe is composed of a connecting left side plate, a connecting right side plate, a connecting front plate, a connecting rear plate, and a connecting top plate; the connecting left side plate, the connecting right side plate, the connecting front plate, the connecting rear plate, and the connecting top plate are integrally arranged, or are separately arranged and fixed to each other.

[0008] The connecting left side plate, the connecting right side plate, the connecting front plate, the connecting rear plate, and the connecting top plate are respectively in the shape of flat plates, and have arc-shaped transitions and / or angle-shaped transitions with each other.

[0009] The inclined connecting pipe is provided with an upper connecting port and a lower connecting port at upper and lower positions respectively; a center line AB between a center A of the upper connecting port and a center B of the lower connecting port is inclined.

[0010] The opening direction of the upper connection port is the same as or different from the opening direction of the lower connection port.

[0011] The inclined connecting pipe is formed by connecting the left side plate, the right side plate, the front plate, the rear plate and the top plate; the upper connecting port is arranged on the connecting front plate and opens toward the front of the range hood; the lower connecting port is formed at the bottom of the connecting left side plate, the connecting right side plate, the connecting front plate and the connecting rear plate and opens toward the bottom surface of the range hood.

[0012] The connecting top plate and / or the connecting rear plate are provided with a top arc-shaped guide portion toward the upper connecting port; the connecting left side plate and / or the connecting right side plate are provided with a side arc-shaped guide portion corresponding to the upper connecting port.

[0013] The connecting left side plate and the connecting right side plate are respectively arranged in an inclined manner.

[0014] The central line AB, the connecting left side plate, and the connecting right side plate have the same inclination direction, and different or the same inclination angles.

[0015] The range hood comprises a range hood body and an upper wind cabinet body; a range hood cavity is arranged inside the range hood body; a wind cabinet cavity is arranged inside the upper wind cabinet body; the lower fan is fixed in the range hood cavity; the upper fan is fixed in the wind cabinet cavity; the inclined connecting pipe is fixed in the range hood cavity or the wind cabinet cavity.

[0016] The utility model improves the above structure and connects the upper fan and the lower fan which are arranged up and down by using the inclined connecting pipe, so that the oil smoke sucked by the lower fan can enter the upper fan through the inclined connecting pipe, and finally be discharged from the upper fan, so as to avoid the problems of the oil smoke running around randomly in the range hood during the suction and exhaust process, resulting in loud noise and large flow resistance, so that the range hood can work more quietly and the oil smoke suction and exhaust efficiency is better, and the static pressure generated by the connected upper and lower fans when working is greater, and the oil smoke suction and exhaust effect is better. At the same time, because the inclined connecting pipe is inclined, it can play a guiding role for the flow of oil smoke, so that the oil smoke can flow in the inclined connecting pipe in the fastest curve, so as to improve the suction and exhaust speed of oil smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the assembly cross-sectional structure of an embodiment of the utility model.

[0019] Figure 3 The figure is a schematic diagram of the exploded structure of an embodiment of the utility model.

[0020] Figure 4 This is a schematic diagram of the exploded structure from another perspective of an embodiment of the utility model.

[0021] Figure 5 It is a schematic diagram of the assembly structure of the upper fan, the lower fan and the inclined connecting pipe.

[0022] Figure 6 This is a schematic diagram of the assembly structure of the upper fan, lower fan, and inclined connecting pipe from another perspective.

[0023] Figure 7 This is a schematic diagram of the assembly structure of the upper fan, lower fan, and inclined connecting pipe from another perspective.

[0024] Figure 8 This is a schematic diagram of the assembly structure of the upper fan, lower fan and inclined connecting pipe from another perspective.

[0025] Fig. 9 It is a schematic diagram of the exploded structure of the upper fan, the lower fan and the inclined connecting pipe.

[0026] Fig.10 This is a schematic diagram of the decomposed structure of the upper fan, lower fan, and inclined connecting pipe from another perspective.

[0027] In the attached drawings, 1-upper fan, 2-lower fan, 3-inclined connecting pipe, 4-connected to the left side plate, 5-connected to the right side plate, 6-connected to the front plate, 7-connected to the rear plate, 8-connected to the top plate, 9-upper connecting port, 10-lower connecting port, 11-top arc-shaped air guide part, 12-side arc-shaped air guide part, 13-range hood body, 14-upper wind cabinet body, 15-range hood cavity, 16-smoke outlet of the range hood, 17-wind cabinet cavity, 18-wind cabinet smoke inlet, 19-wind cabinet smoke outlet. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] See also Figure 1-Figure 10 The range hood with dual fans comprises an upper fan 1 and a lower fan 2 which are arranged up and down. An inclined connecting pipe 3 is provided between the lower fan 2 and the upper fan 1, and the lower fan 2 and the upper fan 1 are connected to each other through the inclined connecting pipe 3.

[0031] The present embodiment utilizes the inclined connecting pipe 3 to connect the upper fan 1 and the lower fan 2 which are arranged up and down, so that the oil smoke sucked by the lower fan 2 can all enter the upper fan 1 through the inclined connecting pipe 3, and finally be discharged from the upper fan 1, so as to avoid the oil smoke running around in the range hood during the suction and exhaust process, causing the problem of loud noise and large flow resistance, so that the range hood can work more quietly and the oil smoke suction and exhaust efficiency is better. Moreover, the static pressure generated by the connected upper fan 1 and the lower fan 2 during operation is greater, and the oil smoke suction and exhaust effect is better. At the same time, since the inclined connecting pipe 3 is inclined, it can play a guiding role for the flow of oil smoke, so that the oil smoke can flow in the inclined connecting pipe 3 in the fastest curve, thereby improving the suction and exhaust speed of the oil smoke.

[0032] The inclined connecting pipe 3 is integrally arranged or formed by splicing a plurality of split components. That is, the inclined connecting pipe 3 is an integral component, or can be formed by independently producing a plurality of split components and then splicing them.

[0033] Specifically, the inclined connecting pipe 3 is composed of a connecting left side plate 4, a connecting right side plate 5, a connecting front plate 6, a connecting rear plate 7, and a connecting top plate 8; the connecting left side plate 4, the connecting right side plate 5, the connecting front plate 6, the connecting rear plate 7, and the connecting top plate 8 are arranged integrally, or are arranged separately and then fixed to each other.

[0034] Among them, the connecting left side plate 4, the connecting right side plate 5, the connecting front plate 6, the connecting rear plate 7, and the connecting top plate 8 are integrally formed, and are also independently produced and then fixed to each other.

[0035] The connecting left side plate 4, the connecting right side plate 5, the connecting front plate 6, the connecting rear plate 7 and the connecting top plate 8 are respectively in the shape of flat plates, and have arc-shaped transitions and / or angle-shaped transitions with each other.

[0036] In this embodiment, the connection between the left side plate 4, the right side plate 5, the front plate 6 and the rear plate 7 is an arc-shaped transition.

[0037] An upper connection port 9 and a lower connection port 10 are respectively provided at the upper and lower positions of the inclined connection pipe 3; a center line AB between a center A of the upper connection port 9 and a center B of the lower connection port 10 is provided in an inclined manner.

[0038] The opening direction of the upper connection port 9 is the same as or different from the opening direction of the lower connection port 10 .

[0039] The upper connection port 9 is arranged on the connecting front plate 6 and opens toward the front of the range hood; the lower connection port 10 is formed at the bottom of the connecting left side plate 4, the connecting right side plate 5, the connecting front plate 6, and the connecting rear plate 7, and opens toward the bottom surface of the range hood.

[0040] Correspondingly, the air outlet of the lower fan 2 faces the top surface of the range hood and is interconnected with the lower connecting port 10 , and the air outlet of the upper fan 1 faces the back surface of the range hood and is interconnected with the upper connecting port 9 .

[0041] A top arc-shaped air guide 11 is provided in the direction of the upper connection port 9 connecting the top plate 8 and / or the rear plate 7 ; a side arc-shaped air guide 12 is provided in the direction of the upper connection port 9 connecting the left side plate 4 and / or the right side plate 5 .

[0042] In this embodiment, the upper connecting port 9 is circular, and a top arc-shaped guide portion 11 is arranged on the connecting rear plate 7 in the direction of the upper connecting port 9, and side arc-shaped guide portions 12 are arranged on the connecting left plate 4 and the connecting right plate 5 corresponding to the upper connecting port 9, respectively, so that the oil smoke of the inclined connecting pipe 3 can be guided in the direction of the upper connecting port 9, which is conducive to the rapid flow of the oil smoke.

[0043] The connecting left side plate 4 and the connecting right side plate 5 are respectively arranged in an inclined manner.

[0044] The center line AB, the connecting left side plate 4, and the connecting right side plate 5 have the same inclination direction, and the inclination angles are different or the same.

[0045] In this embodiment, the inclination angle of the center line AB is the center clamp inclination angle a formed between the center line AB and the vertical line of the range hood, the inclination angle connecting the left side panel 4 is the left side panel inclination angle b formed between the left side panel 4 and the vertical line of the range hood, and the inclination angle connecting the right side panel 5 is the right side panel inclination angle c formed between the right side panel 5 and the vertical line of the range hood.

[0046] Among them, the center clamp inclination angle a, the left side plate inclination angle b, and the right side plate inclination angle c are all set at acute angles, and the angles of the three are different.

[0047] In this embodiment, the central clamp inclination angle a, the left plate inclination angle b, and the right plate inclination angle c are 1-20 degrees. Specifically, the central clamp inclination angle a is 12 degrees, the left plate inclination angle b is 8 degrees, and the right plate inclination angle c is 17 degrees. At the same time, the connecting front plate 6 and the connecting rear plate 7 are respectively arranged vertically, so that the inside of the inclined connecting pipe 3 is inclined from the lower connecting port 10 to the upper connecting port 9. The trumpet shape expands, thereby increasing the flow of oil smoke toward the upper fan 1, and reducing the resistance problem caused by the oil smoke flowing sideways to the upper fan 1.

[0048] The range hood comprises a range hood body 13 and an upper air cabinet body 14; a range hood cavity 15 is arranged inside the range hood body 13; a wind cabinet cavity 17 is arranged inside the upper air cabinet body 14; the lower fan 2 is fixed in the range hood cavity 15; the upper fan 1 is fixed in the wind cabinet cavity 17; and the inclined connecting pipe 3 is fixed in the range hood cavity 15 or the wind cabinet cavity 17.

[0049] In this embodiment, a range hood smoke outlet 16 is provided on the top of the range hood main body 13; the lower fan 2 is fixed in the range hood cavity 15, and its air outlet is connected with the range hood smoke outlet 16; a wind cabinet smoke inlet 18 is provided at the bottom of the upper wind cabinet body 14, and a wind cabinet smoke outlet 19 is provided at the top; the upper fan 1 and the inclined connecting pipe 3 are respectively fixed in the wind cabinet cavity 17; the air outlet of the upper fan 1 is connected with the wind cabinet smoke outlet 19; the lower connecting port 10 provided on the inclined connecting pipe 3 is connected with the wind cabinet smoke inlet 18.

[0050] Since the upper fan 1 and the inclined connecting pipe 3 are respectively fixed in the wind cabinet cavity 17, only the lower fan 2 is fixed in the range hood cavity 15, so that the overall height of the range hood body 13 can be reduced.

[0051] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A range hood with dual fans, comprising an upper fan and a lower fan arranged up and down, characterized in that: An inclined connecting pipe is provided between the lower fan and the upper fan, and the lower fan and the upper fan are connected to each other through the inclined connecting pipe; an upper connecting port and a lower connecting port are provided at upper and lower positions of the inclined connecting pipe, respectively; a center line AB between a center A of the upper connecting port and a center B of the lower connecting port is inclined.

2. The range hood with dual fans according to claim 1, characterized in that: The inclined connecting pipe is integrally arranged or formed by splicing a plurality of split components.

3. The range hood with dual fans according to claim 1, characterized in that: The inclined connecting pipe is composed of a connecting left side plate, a connecting right side plate, a connecting front plate, a connecting rear plate, and a connecting top plate; the connecting left side plate, the connecting right side plate, the connecting front plate, the connecting rear plate, and the connecting top plate are integrally arranged, or are separately arranged and fixed to each other.

4. The range hood with dual fans according to claim 3, characterized in that: The connecting left side plate, the connecting right side plate, the connecting front plate, the connecting rear plate, and the connecting top plate are respectively in the shape of flat plates, and have arc-shaped transitions and / or angle-shaped transitions with each other.

5. The range hood with dual fans according to claim 1, characterized in that: The opening direction of the upper connection port is the same as or different from the opening direction of the lower connection port.

6. The range hood with dual fans according to claim 1, characterized in that: The inclined connecting pipe is formed by connecting the left side plate, the right side plate, the front plate, the rear plate and the top plate; the upper connecting port is arranged on the connecting front plate and opens toward the front of the range hood; the lower connecting port is formed at the bottom of the connecting left side plate, the connecting right side plate, the connecting front plate and the connecting rear plate and opens toward the bottom surface of the range hood.

7. The range hood with dual fans according to claim 6, characterized in that: The connecting top plate and / or the connecting rear plate are provided with a top arc-shaped guide portion toward the upper connecting port; the connecting left side plate and / or the connecting right side plate are provided with a side arc-shaped guide portion corresponding to the upper connecting port.

8. The range hood with dual fans according to claim 6, characterized in that: The connecting left side plate and the connecting right side plate are respectively arranged in an inclined manner; The central line AB, the connecting left side plate, and the connecting right side plate have the same inclination direction, and different or the same inclination angles.

9. The range hood with dual fans according to any one of claims 1 to 8, characterized in that: The range hood comprises a range hood body and an upper wind cabinet body; a range hood cavity is arranged inside the range hood body; a wind cabinet cavity is arranged inside the upper wind cabinet body; the lower fan is fixed in the range hood cavity; the upper fan is fixed in the wind cabinet cavity; the inclined connecting pipe is fixed in the range hood cavity or the wind cabinet cavity.

Images