Range hood

Abstract

The utility model provides a range hood which comprises a volute and an oil guide groove, an oil outlet is formed in the bottom of the volute, and the range hood further comprises a sealing piece and an elastic piece. A first end of the elastic piece is fixed on the oil guide groove, a second end of the elastic piece is connected with the sealing piece, and the sealing piece can be switched between a first position and a second position; when the sealing element is at the first position, a circulation gap is formed between the sealing element and the oil outlet hole due to the elastic force of the elastic element; and when the sealing piece is located at the second position, the sealing piece covers the oil outlet hole to block the oil outlet hole under the action of gas pressure in the volute. According to the range hood, the sealing piece and the elastic piece are arranged in the range hood, when the range hood is shut down, the elastic piece enables a circulation gap to be formed between the oil outlet holes, and oil drops can flow into the oil guide groove; when the range hood is started, the air pressure in the volute is increased, and the sealing element is pressed to plug the oil outlet hole, so that air leakage at the oil outlet hole is avoided, and the phenomenon that extra noise is generated when the range hood is started due to the existence of the oil outlet hole is avoided.

Description

Technical Field

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

[0002] After the oil smoke enters the range hood, it will be separated. Most of the separated oil droplets will be deposited in the volute. Therefore, when designing the volute, the designers will open an oil leakage port at the bottom of the volute to discharge the oil droplets in the volute to ensure that the deposited oil droplets will not overflow.

[0003] At present, the oil leakage port is generally in the form of a hole, that is, a small oil leakage hole is opened at the bottom of the volute to ensure that the oil droplets can be discharged in time. However, when the fan system of the range hood is working, the oil leakage hole often causes air leakage and increased noise intensity. The high-pressure fluid in the volute leaks from the oil leakage hole, reducing the efficiency of the fan system. At the same time, the gas leaking out of the small hole at a high speed will also increase the noise. The increased noise is about 1 to 2 dB according to experimental measurements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A range hood, comprising a volute and an oil guide groove, wherein the bottom of the volute is provided with an oil outlet, and the range hood further comprises a sealing member and an elastic member;

[0007] The first end of the elastic member is fixed to the volute or the oil guide groove, the second end of the elastic member is connected to the sealing member, and the sealing member can be switched between a first position and a second position;

[0008] When the seal is in the first position, the elastic force of the elastic member creates a flow gap between the seal and the oil outlet hole; when the seal is in the second position, the gas pressure inside the volute causes the seal to cover the oil outlet hole to seal the oil outlet hole.

[0009] By arranging a sealing member and an elastic member in the range hood, the sealing member is inside the volute. When the range hood is stopped, the elastic member allows a flow gap to exist between the oil outlet holes. That is to say, in the first position, the oil smoke liquefied to form oil droplets can flow into the oil guide groove through the oil outlet holes. When the range hood is turned on, the air pressure in the volute increases, exerting a pressure on the sealing member opposite to the elastic force of the elastic member. The sealing member is pressed and switches to the second position. The sealing member blocks the oil outlet holes, thereby preventing air from leaking out of the oil outlet holes, thereby avoiding additional noise generated when the range hood is turned on due to the existence of the oil outlet holes.

[0010] Preferably, the oil outlet hole gradually shrinks in a vertical downward direction, the oil outlet hole has a peripheral wall, and the peripheral side edge of the sealing member contacts the peripheral wall of the oil outlet hole to seal the oil outlet hole.

[0011] By setting the oil outlet hole to gradually shrink in the vertical downward direction, the gradually shrinking oil outlet hole has a gathering effect on the oil droplets, and the purpose of sealing the oil outlet hole is achieved by the peripheral wall of the oil outlet hole contacting the peripheral side of the seal, so that the seal can be completely sunken in the oil outlet hole in the second position and can also achieve a good effect of sealing the oil outlet hole. The seal does not occupy the space inside the volute of the range hood and does not affect the air volume inside the volute.

[0012] Preferably, the peripheral side of the sealing member is in contact with the peripheral wall of the oil outlet hole.

[0013] By arranging the peripheral side of the sealing member to fit with the peripheral wall of the oil outlet hole, the sealing member can better seal the oil outlet hole.

[0014] Preferably, the thickness of the volute at the oil outlet is greater than the thickness at other positions of the volute.

[0015] By making the oil outlet hole thicker than the volute body, the peripheral wall can have a longer extension length, so that the top and bottom ends of the oil outlet hole have a sufficient width difference, thereby ensuring that the seal will not drill out from the bottom of the oil outlet hole.

[0016] Preferably, the range hood further comprises an oil guiding structure, a first end of the oil guiding structure is connected to the sealing member, and a second end of the oil guiding structure is connected to the oil guiding groove.

[0017] The oil droplets slide down the oil guide structure to the oil leakage groove instead of dripping directly, thus avoiding the problem of oil drop leakage.

[0018] Preferably, the oil guiding structure is the elastic member.

[0019] By using the elastic member as the oil guiding structure, the elastic member has the functions of guiding oil and providing elastic force, which can reduce the number of parts and make the structure of the range hood simpler.

[0020] Preferably, the elastic member is a coil spring.

[0021] Preferably, the sealing member has a mounting hole, and the coil spring is embedded in the mounting hole.

[0022] The coil spring is fixed by setting the mounting hole, so that the fixing of the coil spring is more convenient.

[0023] Preferably, the center position of the sealing member is connected to the second end of the elastic member.

[0024] By connecting the center position of the sealing member to the second end of the elastic member, the force exerted by the elastic member on the sealing member is distributed more evenly.

[0025] Preferably, the oil guide groove is arranged below the volute, the oil guide groove is arranged to be inclined downward from front to rear, and the oil outlet hole is arranged close to the front side of the volute.

[0026] By arranging the oil outlet hole at the front side of the volute, the distance between the oil outlet hole and the oil guide groove is closer, thereby preventing the elastic member from being over-stretched and aged when the sealing member is in the second position.

[0027] The positive progressive effect of the utility model is that by arranging a sealing member and an elastic member in the range hood, the sealing member is inside the volute, and when the range hood is stopped, the elastic member allows the oil outlet holes to be positioned with a flow gap, that is, in the first position, liquefied oil smoke can flow into the oil guide groove through the oil outlet holes; when the range hood is turned on, the air pressure in the volute increases, exerting a pressure on the sealing member opposite to the elastic force of the elastic member, and the sealing member is pressed to switch to the second position, and the sealing member blocks the oil outlet holes, so that no air leaks from the oil outlet holes, thereby avoiding additional noise generated when the range hood is turned on due to the existence of the oil outlet holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of a volute and an oil guide groove according to an embodiment of the utility model.

[0029] Figure 2 This is a schematic structural diagram of a sealing member in a first position according to an embodiment of the utility model.

[0030] Figure 3 for Figure 2 A magnified schematic diagram of B.

[0031] Figure 4 This is a schematic structural diagram of a sealing member in a second position according to an embodiment of the utility model.

[0032] Figure 5 for Figure 4 A is an enlarged schematic diagram.

[0033] Description of reference numerals:

[0034] Snail 1

[0035] Oil outlet 11

[0036] Peripheral wall 12

[0037] Oil guide groove 2

[0038] Seal 3

[0039] Side 31

[0040] Elastic parts 4 DETAILED DESCRIPTION

[0041] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0042] like Figure 1-Figure 5 As shown, this embodiment provides a range hood, which includes a volute 1 and an oil guide groove 2, with an oil outlet hole 11 at the bottom of the volute 1, and the range hood also includes a sealing member 3 and an elastic member 4; the first end of the elastic member 4 is fixed on the oil guide groove 2, the second end of the elastic member 4 is connected to the sealing member 3, and the sealing member 3 can be switched between a first position and a second position; when the sealing member 3 is in the first position, the elastic force of the elastic member 4 allows a flow gap to exist between the sealing member 3 and the oil outlet hole 11; when the sealing member 3 is in the second position, the gas pressure inside the volute 1 causes the sealing member 3 to cover the oil outlet hole 11 to seal the oil outlet hole 11. By arranging a sealing member 3 and an elastic member 4 in the range hood, the sealing member 3 is inside the volute 1. When the range hood is stopped, the elastic member 4 allows a flow gap to exist between the oil outlet holes 11. That is to say, in the first position, the oil smoke liquefied to form oil droplets can flow from the oil outlet holes 11 to the oil guide groove 2 through the flow gap. When the range hood is turned on, the air pressure in the volute 1 increases, exerting a pressure on the sealing member 3 opposite to the elastic force of the elastic member 4. The sealing member 3 is pressed and switched to the second position. The sealing member 3 blocks the oil outlet holes 11, so that no air leaks from the oil outlet holes 11, thereby avoiding additional noise generated when the range hood is turned on due to the existence of the oil outlet holes 11.

[0043] In this embodiment, if Figure 1 As shown, the oil outlet hole 11 is arranged at the bottom of the volute 1, and the oil outlet hole 11 gradually shrinks in the vertical downward direction. The oil outlet hole 11 has a peripheral wall 12, and the edge of the peripheral side 31 of the seal 3 contacts the peripheral wall 12 of the oil outlet hole 11 to achieve the blocking of the oil outlet hole 11. By setting the oil outlet hole 11 to gradually shrink in the vertical downward direction, the gradually shrinking oil outlet hole 11 has a gathering effect on oil droplets. The purpose of blocking the oil outlet hole 11 is achieved by the peripheral wall 12 of the oil outlet hole 11 contacting the peripheral side 31 of the seal 3, so that the seal 3 is completely sunk in the oil outlet hole 11 in the second position, and the effect of better blocking the oil outlet hole 11 can be achieved. The seal 3 does not occupy the space inside the volute 1 of the range hood, and does not affect the air volume inside the volute 1.

[0044] In other embodiments, the oil outlet hole 11 can also be set to be equal in size at all locations. In this case, the size of the seal 3 can be set to be larger than the size of the oil outlet hole 11, and the bottom wall of the seal 3 contacts the volute 1 to cover the oil outlet hole 11, thereby achieving the purpose of blocking the oil outlet hole 11.

[0045] In this embodiment, if Figure 4 and Figure 5As shown, the circumferential side 31 of the seal 3 is in contact with the circumferential wall 12 of the oil outlet hole 11. That is to say, when the seal 3 blocks the oil outlet hole 11, the seal 3 and the circumferential wall 12 of the oil outlet hole 11 are in surface contact rather than line contact. By setting the circumferential side 31 of the seal 3 to be in contact with the circumferential wall 12 of the oil outlet hole 11, the shape of the seal 3 matches the shape of the oil outlet hole 11, and the seal 3 blocks the oil outlet hole 11 more effectively. At the same time, the top surface of the seal 3 is larger, and the pressure of the airflow in the volute 1 is larger, which is conducive to the seal 3 blocking the oil outlet hole 11.

[0046] In this embodiment, Figure 2 and Figure 4 As shown, the thickness of the volute 1 at the oil outlet 11 is greater than the thickness at other positions of the volute 1. By setting the oil outlet 11 thicker than the body of the volute 1, the peripheral wall 12 can have a longer extension length, so that the top and bottom ends of the oil outlet 11 have a sufficient width difference, thereby ensuring that the widest part of the seal 3 is at the bottom end of the oil outlet 11 and has a sufficient width difference, and the seal 3 will not drill out from the bottom of the oil outlet 11.

[0047] Specifically in the present embodiment, the thickness of the volute 1 at the oil outlet 11 is formed by stamping. In other embodiments, the thickness of the volute 1 at the oil outlet 11 may be increased by welding on the outer side of the volute 1.

[0048] In this embodiment, if Figure 3 and Figure 5 As shown, the range hood further includes an oil guide structure, a first end of the oil guide structure is connected to the seal 3, and a second end of the oil guide structure is connected to the oil guide groove 2. Specifically, the oil guide structure in this embodiment is an elastic member 4. That is, the elastic member 4 acts as an elastic support structure and an oil guide structure at the same time. On the one hand, it applies a force to the seal 3 so that the seal 3 can be switched from the second position to the first position. On the other hand, as an oil guide structure, the oil droplets slide along the oil guide structure to the oil leakage groove instead of dripping directly, thus avoiding the problem of oil drop leakage, reducing the number of parts, and making the structure of the range hood simpler.

[0049] Of course, in other embodiments, the oil guide structure may also be provided separately, for example, a telescopic rod that can be extended and retracted with the movement of the seal 3 is provided, the telescopic rod connects the seal 3 and the oil guide groove 2, so that the oil droplets flow along the telescopic rod into the oil guide groove 2, or in more embodiments, the oil guide structure may also be other structural forms that can be extended and retracted with the movement of the seal 3, which will not be repeated here.

[0050] In this embodiment, the elastic member 4 is a coil spring. The sealing member 3 has a mounting hole, and the coil spring is embedded in the mounting hole. The coil spring is fixed by providing the mounting hole, so that the fixing of the coil spring is more convenient.

[0051] Of course, in other embodiments, the elastic member 4 may also be other structural forms in the prior art such as a spring telescopic rod, etc., which will not be described in detail here.

[0052] In this embodiment, if Figure 3 and Figure 5 As shown, the second end of the elastic member 4 is connected to the center of the seal 3, that is, a mounting hole is provided at the center of the seal 3, and the coil spring is embedded in the mounting hole. By connecting the second end of the elastic member 4 to the center of the seal 3, the elastic member 4 acts on the center of the seal 3, and the force acting on the seal 3 is more evenly distributed.

[0053] In this embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, the oil guide groove 2 is arranged below the volute 1, the oil guide groove 2 is arranged obliquely downward from the front to the rear, and the oil outlet hole 11 is arranged near the front side of the volute 1. Since the first end of the elastic member 4 in this embodiment is connected to the oil guide groove 2, by arranging the oil outlet hole 11 at the front side of the volute 1, the distance between the oil outlet hole 11 and the oil guide groove 2 is closer, which can prevent the elastic member 4 from being over-stretched and aged when the sealing member 3 is in the second position.

[0054] Of course, in other embodiments, the second end of the elastic member 4 may also be connected to the volute 1. For example, the second end of the elastic member 4 is fixed to the outside of the volute 1, and the elastic member 4 is connected to the seal 3 through the oil outlet hole 11, which will not be repeated here.

[0055] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A range hood, comprising a volute and an oil guide groove, wherein the bottom of the volute has an oil outlet, characterized in that: The range hood further comprises a sealing member and an elastic member; The first end of the elastic member is fixed to the volute or the oil guide groove, the second end of the elastic member is connected to the sealing member, and the sealing member can be switched between a first position and a second position; When the seal is in the first position, the elastic force of the elastic member creates a flow gap between the seal and the oil outlet hole; when the seal is in the second position, the gas pressure inside the volute causes the seal to cover the oil outlet hole to seal the oil outlet hole.

2. The range hood according to claim 1, characterized in that: The oil outlet hole gradually shrinks in a vertical downward direction, and the oil outlet hole has a peripheral wall. The peripheral side edge of the sealing member contacts the peripheral wall of the oil outlet hole to seal the oil outlet hole.

3. The range hood according to claim 2, characterized in that: The peripheral side of the sealing member is in contact with the peripheral wall of the oil outlet hole.

4. The range hood according to claim 2, characterized in that: The thickness of the volute at the oil outlet is greater than the thickness at other positions of the volute.

5. The range hood according to claim 1, characterized in that: The range hood further comprises an oil guiding structure, a first end of the oil guiding structure is connected to the sealing component, and a second end of the oil guiding structure is connected to the oil guiding groove.

6. The range hood according to claim 5, characterized in that: The oil guiding structure is the elastic member.

7. The range hood according to claim 1, characterized in that: The elastic member is a coil spring.

8. The range hood according to claim 7, characterized in that: The sealing member has a mounting hole, and the coil spring is embedded in the mounting hole.

9. The range hood according to any one of claims 1 to 8, characterized in that: The center position of the sealing member is connected to the second end of the elastic member.

10. The range hood according to any one of claims 1 to 8, characterized in that: The oil guide groove is arranged below the volute, the oil guide groove is arranged obliquely downward from the front to the rear, and the oil outlet hole is arranged close to the front side of the volute.

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