Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, an air inlet, an air outlet and a fan, the smoke barrier is rotationally connected to the machine shell through a first hinge and can open and close the air inlet, the first end of the first hinge is rotationally connected to the machine shell around a first axis extending left and right, and the second end of the first hinge is connected with the smoke barrier; an auxiliary tensioning mechanism is further included, the auxiliary tensioning mechanism comprises an elastic component, the elastic component is provided with a telescopic end capable of elastically stretching out and drawing back along a straight line, the telescopic end always tends to extend outwards relative to a main body of the elastic component, and the main body of the elastic component is rotationally connected to the machine shell around a second axis extending left and right. The telescopic end of the elastic component is rotationally connected to the first hinge around a third axis extending left and right, and the smoke barrier always has the tendency of further deflecting in the direction of closing the air inlet when the smoke barrier is close to the closed air inlet. The smoke barrier has the advantage that the problem that the product fineness is affected due to untight closing of the smoke barrier can be effectively solved.

Description

Technical Field

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

[0002] Existing side-suction range hoods usually have an air inlet on the panel. In order to avoid the air inlet being exposed and not aesthetically pleasing when the range hood is not working and to increase the smoke collection area, a smoke baffle is provided at the air inlet. For example, the Chinese utility model patent application with application number CN201320529723.1 discloses such a range hood. The smoke baffle of a traditional close-suction range hood is a driving end at one end and a driven end at the other end. The driving end and the driven end are arranged on the left and right sides. The driving end is driven by a driving mechanism to rotate the smoke baffle. Since the left and right sides are not running synchronously, a step difference is generated after the smoke baffle is closed, causing quality problems. On the other hand, due to the asynchronous operation of the left and right sides, the design will choose to make design compensation on the hinge of the driven end during the design, resulting in inconsistency between the left and right hinges. During production, workers need to distinguish and identify them, which is prone to errors. There is also a method of setting the driving end for driving the smoke baffle to deflect in the middle position of the left and right directions of the smoke baffle to improve the problem of loose closing of the driven end of the smoke baffle. However, setting the driving end in the middle position of the smoke baffle will inevitably affect the installation of other components in the casing, resulting in interference problems.

[0003] Therefore, the existing close-suction range hoods need further improvement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a range hood which can effectively improve the problem that the product refinement is affected by the loose closure of the smoke baffle plate in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0006] The casing has an air inlet on its front side wall;

[0007] A smoke shield is rotatably connected to the housing through a first hinge and can open and close the air inlet, wherein the first hinge has a first end and a second end opposite to each other, the first end of the first hinge is rotatably connected to the housing around a first axis extending left and right, and the second end is connected to the smoke shield;

[0008] It also includes an auxiliary tensioning mechanism, which includes an elastic member, the elastic member has a telescopic end that can elastically extend and retract along a straight line, and the telescopic end always has a tendency to extend outward relative to the main body of the elastic member, the main body of the elastic member is rotatably connected to the casing around a second axis extending left and right, the telescopic end of the elastic member is rotatably connected to the first hinge around a third axis extending left and right, and the smoke shield always has a tendency to continue to deflect further in the direction of closing the air inlet when the smoke shield is in a state close to closing the air inlet.

[0009] In order to enable the smoke shield to always have a tendency to continue to further deflect in the direction of closing the air inlet when the smoke shield is in a state close to closing the air inlet, a reference plane is formed between the first axis and the second axis;

[0010] When the smoke baffle is in a state of closing the air inlet or is close to closing the air inlet, the third axis is located in front of the reference plane.

[0011] As a further improvement, in order to arrange the elastic component in a reasonable space within the casing, the second axis is located above and behind the first axis, so that the reference plane is tilted forward from top to bottom, and when the smoke baffle is in a state of closing the air inlet or is close to a state of closing the air inlet, the third axis is located above and in front of the reference plane.

[0012] Generally speaking, in the process of the smoke shield from the closed state to the maximum opening angle state, the elastic member can always provide the smoke shield with a force to close the air inlet, but considering that the opening process is relatively laborious, especially when the smoke shield is in the maximum opening angle state, the elastic member is in the maximum compression state, which is not conducive to extending the service life of the elastic member. Therefore, when the smoke shield is in the maximum opening angle or near the maximum opening angle state, the third axis is located at the rear side of the reference plane. That is, the elastic member can make the smoke shield always have a tendency to continue to deflect further in the direction of opening the air inlet when it is near the maximum opening angle state.

[0013] As an improvement, the second axis is located above and behind the first axis, so that the reference plane is tilted forward from top to bottom. When the smoke baffle is at the maximum opening angle or near the maximum opening angle, the third axis is located below and behind the reference plane.

[0014] As a further improvement, during the process of the smoke baffle opening the air inlet, the auxiliary tensioning mechanism has at least the following transition state: the first axis, the second axis and the third axis are coplanar.

[0015] As an improvement, the elastic member is a pneumatic spring. It is conceivable that the elastic member can also be a rubber elastic member with a certain elastic expansion and contraction amount.

[0016] As an improvement, the front side wall of the housing is tilted backward from top to bottom, and the smoke baffle in the closed air inlet state is also tilted backward from top to bottom. Of course, considering the various application types of the range hood, the front side wall of the housing can also extend vertically.

[0017] In order to install the spring component and the first hinge in the casing, the main body of the elastic component is rotatably connected to the inner side of the top wall of the casing, and the first end of the first hinge is rotatably connected to the inner side of the front side wall of the casing corresponding to the area above the air inlet.

[0018] In order to drive the smoke shield to open and close automatically, a driving device for driving the smoke shield to rotate around the first axis is also included, and the driving device and the auxiliary tensioning mechanism are respectively located on the left and right sides of the housing. It can be imagined that if the smoke shield is opened manually, two sets of auxiliary tensioning mechanisms can be provided, respectively located on the left and right sides of the housing.

[0019] As an improvement, the driving device includes a driving motor and a second hinge drivingly connected to the output shaft of the driving motor, the second hinge having a first end and a second end relative to each other, the first end of the second hinge also being rotatably connected to the casing around a first axis extending left and right, and the second end being connected to the smoke baffle.

[0020] Compared with the prior art, the advantages of the utility model are as follows: the auxiliary tensioning mechanism utilizes an elastic component that can elastically expand and contract along a straight line to apply a certain force to the first hinge when the smoke shield is closed, so that the smoke shield always has a tendency to continue to deflect further in the direction of closing the air inlet when it is close to the state of closing the air inlet, thereby ensuring that the closed states of the left and right sides of the smoke shield tend to be consistent, thereby improving the refinement of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model;

[0022] Figure 2 This is a right side view of the range hood of the embodiment of the utility model (the right side panel of the housing is omitted, and the smoke baffle is in a closed state);

[0023] Figure 3 This is a right side view of the range hood of the embodiment of the utility model (the right side panel of the housing is omitted, and the smoke baffle is in the state of being opened);

[0024] Figure 4 This is a right side view of the range hood of the embodiment of the utility model (the right side panel of the housing is omitted, and the smoke baffle is in the maximum opening angle state);

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the range hood of the embodiment of the utility model after the left side panel of the casing is omitted. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0028] Figure 1-Figure 5 A preferred embodiment of the range hood of the utility model is shown. The range hood includes a casing 10 and a centrifugal fan arranged in the casing 10. The casing 10 generally includes a fan frame 11 and a fume hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected with the inner cavity of the fume hood 12. An air inlet 120 is provided on the front side wall of the fume hood 12, and external smoke can enter the fume hood 12 through the air inlet 120. The centrifugal fan (not shown) is arranged in the fan frame 11. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 12 through the air inlet 120. An oil cup 13 is provided at the bottom of the fume hood 12. The oil cup 13 is in the shape of a long strip extending left and right, and is used to receive the oil stains flowing down from the fume hood 12. The front part of the smoke hood 12 is also provided with a smoke baffle 14 that can deflect forward and backward relative to the smoke hood 12. The smoke baffle 14 is rotatably connected to the main body of the smoke hood 12 through a hinge mechanism. The hinge mechanism includes a first hinge 22 and a second hinge 25. The first hinge 22 and the second hinge 25 both have opposite first and second ends. The first end of the first hinge 22 and the first end of the second hinge 25 are both rotatably connected to the inner wall of the housing 10 around a first axis A1 extending left and right. The second end of the first hinge 22 and the second end of the second hinge 25 are both fixedly connected to the smoke baffle brackets 141 on the left and right sides of the back of the smoke baffle 14. Specifically, the first end of the first hinge 22 is rotatably connected to the inner wall of the housing 10 located above the air inlet 120 through a pin extending left and right, and the first end of the second hinge 25 is also rotatably connected to the inner wall of the housing 10 located above the air inlet 120 through a pin extending left and right. The above two pins extend on the same straight line (i.e., the first axis A1).

[0029] A driving motor 23 is also provided in the casing 10, and the driving motor 23 is connected to the above-mentioned second hinge 25 through a transmission mechanism 24 (the existing gear transmission mechanism 24 or connecting rod transmission mechanism 24 can be used). The driving motor 23, the transmission mechanism 24 and the second hinge 25 together constitute a driving device for driving the smoke shield 14 to rotate. The working process of the driving device jointly constituted by the driving motor 23, the transmission mechanism 24 and the second hinge 25 is the existing technology and will not be repeated here. Driven by the driving device, the smoke shield 14 can deflect forward to open the above-mentioned air inlet 120 and deflect backward to block and close the above-mentioned air inlet 120. The second hinge 25 connected to the driving motor 23 is arranged on one of the left and right sides of the smoke hood 12 as an active end, and the first hinge 22 is arranged on the other side of the smoke hood 12 as a driven end. As shown Figure 2 and Figure 5 As shown, the first hinge 22 is located on the right side of the smoke collecting hood 12 , and the second hinge 25 is located on the left side of the smoke collecting hood 12 .

[0030] The front side wall of the smoke hood 12 of this embodiment is tilted backward from top to bottom, wherein the smoke baffle 14 is also tilted backward from top to bottom in the closed state. An auxiliary tensioning mechanism is also provided in the housing 10, and the auxiliary tensioning mechanism is connected to the first hinge 22 and is used to apply a force to the first hinge 22 to assist in closing the smoke baffle 14.

[0031] The auxiliary tensioning mechanism includes an elastic member 21, which has a telescopic end that can be elastically extended along a straight line, and the telescopic end always has a tendency to extend outward relative to the main body of the elastic member 21. Specifically, the elastic member 21 of this embodiment is a pneumatic spring, the main body of the pneumatic spring is rotatably connected to the fixed bracket 210 on the inner side of the top wall of the smoke hood 12, and the telescopic rod of the pneumatic spring can automatically extend outward, and the telescopic rod is the telescopic end of the elastic member 21. The axis of rotation of the pneumatic spring relative to the smoke hood 12 extends left and right, which is recorded as the second axis A2. The end of the telescopic rod of the pneumatic spring is rotatably connected to the first hinge 22, and the axis of relative rotation between the two extends left and right, which is recorded as the third axis A3. Specifically, in order to facilitate the connection between the pneumatic spring and the first hinge 22 and ensure that the pneumatic spring has a suitable force application angle on the first hinge 22, the middle part of the first hinge 22 has an extension arm 221 extending outward, and the end of the telescopic rod of the pneumatic spring is rotatably connected to the extension arm 221 through a pin.

[0032] like Figure 2-Figure 4 As shown in FIG. 1 , the plane formed between the first axis A1 and the second axis A2 is recorded as the reference plane. The second axis A2 is located above and behind the first axis A1, that is, the pneumatic spring as a whole is tilted forward from top to bottom, so that the reference plane is tilted forward from top to bottom. Figure 2As shown, when the smoke baffle 14 is in a state of closing the air inlet 120 or is adjacent to a state of closing the air inlet 120, the third axis A3 is located above and in front of the above-mentioned reference plane, and the force applied by the pneumatic spring to the first hinge 22 can enable the smoke baffle 14 to always continue to deflect further in the direction of closing the air inlet 120, thereby achieving the purpose of assisting in closing the smoke baffle 14.

[0033] Generally speaking, during the process of the smoke shield 14 changing from the closed state to the maximum opening angle state, the elastic member 21 may always provide the smoke shield 14 with a force to close the air inlet 120. However, considering that the opening process is relatively laborious, especially when the smoke shield 14 is at the maximum opening angle state, the elastic member 21 is in the maximum compression state, which is not conducive to extending the service life of the elastic member 21. For this reason, Figure 3 As shown, in the process of the smoke damper 14 opening the air inlet 120, the auxiliary tensioning mechanism has a transition state: the first axis A1, the second axis A2 and the third axis A3 are coplanar. In this state, the pneumatic spring is compressed to the shortest, that is, it has the maximum elastic potential energy. This state is the critical point of force change of the smoke damper 14. When the smoke damper 14 continues to open beyond the critical point, such as when the smoke damper 14 is at the maximum opening angle or close to the maximum opening angle, the third axis A3 is located at the rear and lower side of the reference plane. In this way, the elastic member 21 can make the smoke damper 14 always have a tendency to continue to deflect further in the direction of opening the air inlet 120 when it is close to the maximum opening angle.

[0034] The action process of the smoke baffle 14 of the range hood of this embodiment is as follows:

[0035] When the smoke baffle 14 of the range hood is opened, the state of the auxiliary tensioning mechanism of the smoke baffle 14 will successively go through the first state (such as Figure 2 The state shown), the second state (as Figure 3 The state shown) and the third state (as shown Figure 4 When the smoke baffle 14 of the range hood is closed, it will pass through the third, second, and first states in sequence. When the third state is changed to the second state, the pneumatic spring does negative work. When the second state is changed to the first state, the pneumatic spring does positive work to help the smoke baffle 14 close smoothly, and the smoke baffle 14 is continuously tightened on the side, thereby ensuring that the closed states of the left and right sides of the smoke baffle 14 are consistent, thereby improving the refinement of the product.

Claims

1. A range hood, comprising: The casing (10) has an air inlet (120) formed on its front side wall; a smoke shield (14) rotatably connected to the housing (10) via a first hinge (22) and capable of opening and closing the air inlet (120); the first hinge (22) having a first end and a second end opposite to each other; the first end of the first hinge (22) is rotatably connected to the housing (10) around a first axis (A1) extending leftward and rightward, and the second end is connected to the smoke shield (14); The invention is characterized in that it also includes an auxiliary tensioning mechanism, which includes an elastic member (21), wherein the elastic member (21) has a telescopic end that can be elastically extended and retracted along a straight line, and the telescopic end always has a tendency to extend outward relative to the main body of the elastic member (21), the main body of the elastic member (21) is rotatably connected to the casing (10) around a second axis (A2) extending left and right, and the telescopic end of the elastic member (21) is rotatably connected to the first hinge (22) around a third axis (A3) extending left and right, and the smoke baffle (14) always has a tendency to continue to deflect further in the direction of closing the air inlet when it is close to the closed air inlet (120).

2. The range hood according to claim 1, characterized in that: A reference plane is formed between the first axis (A1) and the second axis (A2); When the smoke baffle (14) is in a state of closing the air inlet (120) or is in a state close to closing the air inlet (120), the third axis (A3) is located in front of the reference plane.

3. The range hood according to claim 2, characterized in that: The second axis (A2) is located above and behind the first axis (A1), so that the reference plane is tilted forward from top to bottom, and when the smoke shield (14) is in a state of closing the air inlet (120) or is in a state close to closing the air inlet (120), the third axis (A3) is located above and in front of the reference plane.

4. The range hood according to claim 2, characterized in that: When the smoke baffle (14) is at a maximum opening angle or a state close to the maximum opening angle, the third axis (A3) is located at the rear side of the reference plane.

5. The range hood according to claim 4, characterized in that: The second axis (A2) is located above and behind the first axis (A1), so that the reference plane is tilted forward from top to bottom, and when the smoke baffle (14) is at a maximum opening angle or near a maximum opening angle, the third axis (A3) is located below and behind the reference plane.

6. The range hood according to claim 1, characterized in that: During the process of the smoke baffle (14) opening the air inlet, the auxiliary tensioning mechanism has at least the following transition state: the first axis (A1), the second axis (A2) and the third axis (A3) are coplanar.

7. The range hood according to any one of claims 1 to 6, characterized in that: The elastic component (21) is a pneumatic spring.

8. The range hood according to any one of claims 1 to 6, characterized in that: The front side wall of the casing (10) is tilted backward from top to bottom, and the smoke baffle (14) in a state of closing the air inlet (120) is also tilted backward from top to bottom.

9. The range hood according to any one of claims 1 to 6, characterized in that: The main body of the elastic component (21) is rotatably connected to the inner side of the top wall of the casing (10), and the first end of the first hinge (22) is rotatably connected to the inner side of the front side wall of the casing (10) corresponding to the area above the air inlet (120).

10. The range hood according to any one of claims 1 to 6, characterized in that: It also includes a driving device for driving the smoke baffle (14) to rotate around the first axis (A1), and the driving device and the auxiliary tensioning mechanism are respectively located on the left and right sides of the casing (10).

11. The range hood according to claim 10, characterized in that: The driving device comprises a driving motor (23) and a second hinge (25) drivingly connected to an output shaft of the driving motor (23); the second hinge (25) has a first end and a second end opposite to each other; the first end of the second hinge (25) is also rotatably connected to the housing (10) around a first axis (A1) extending leftward and rightward, and the second end is connected to the smoke baffle (14).

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