Range hood

Abstract

The utility model relates to a range hood, which comprises: a box body, the interior of which is hollow to form a cavity with a smoke inlet and a smoke outlet, the box body is provided with a back surface facing a wall, and the back surface is recorded as a backward direction; the fan system is arranged in the cavity and is used for driving oil smoke airflow to be sucked into the cavity from the smoke inlet and output from the smoke outlet; the foot pad piece is arranged on the back face of the box body and comprises a base, the interior of the base is hollow, a cavity filled with fluid is formed in the base, and a penetrating hole penetrating through the wall thickness is formed in the rear side wall of the cavity; the side peripheral wall of the piston column is arranged in the penetrating hole in a penetrating mode in an axial moving mode and is directly or indirectly attached to the inner wall face of the penetrating hole so that the cavity can be in a closed state, the front end face of the piston column is located in the cavity, and the rear end face of the piston column is located outside the cavity, protrudes relative to the back face of the box body and is used for making contact with the wall. Compared with the prior art, vibration generated in the operation process of the range hood can be well buffered.

Description

Technical Field

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

[0002] Currently, the installation of the range hood is to first fix the hook to the wall with expansion screws, and then hang the upper back of the range hood on the hook, and the lower back of the range hood is supported on the wall by the left and right feet. In this way, the range hood is hung on the wall by the hook on the back panel and the two feet.

[0003] Most of the existing foot pads are in the form of gaskets, such as the Chinese utility model patent "Ranger hood and its shell component" (authorization announcement number CN218523619U) with patent number 202222239832.1. The shell component of the range hood is provided with a hanging hole for hanging the range hood on the wall, including a first shock-absorbing pad; a groove-shaped reinforcement rib is provided above the hanging hole for strengthening the hanging hole; one end of the first shock-absorbing pad is arranged in the groove of the groove-shaped reinforcement rib, and the other end is located outside the groove and is suitable for leaning against the wall.

[0004] The existing gasket helps to buffer the vibration generated during the operation of the range hood while ensuring the firmness of the range hood. However, the buffering effect needs to be further improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a range hood in view of the current status of the prior art, so as to better buffer the vibration generated during the operation of the range hood.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0007] The box body is hollow inside to form a cavity with a smoke inlet and a smoke outlet, and the box body has a back side facing the wall, and the direction of the back side is backward;

[0008] A fan system is arranged in the cavity and is used to drive the oil smoke flow to be sucked into the cavity from the smoke inlet and discharged from the smoke outlet;

[0009] A foot pad is arranged on the back of the box;

[0010] It is characterized in that the foot pad comprises:

[0011] A base, the interior of which is hollow to form a chamber filled with a fluid, wherein a rear side wall of the chamber is provided with a through hole penetrating through the wall thickness;

[0012] The piston column extends forward and backward, and its side wall is penetrated in the through hole in a manner that can move axially, and is directly or indirectly in contact with the inner wall surface of the through hole so that the chamber is in a closed state. Its front end face is located in the chamber, and its rear end face is located outside the chamber and protrudes relative to the back side of the box body for contacting the wall.

[0013] In this way, when the range hood is working and the fan system drives the box to vibrate, the rear end face of the piston column contacts the wall, so that the reaction force generated by the wall on the range hood acts on the rear end face of the piston column, so that the piston column moves forward relative to the base. At this time, the fluid in the base chamber will provide a buffer to alleviate the reaction force of the wall on the range hood and reduce the vibration of the range hood.

[0014] The above-mentioned fluid can be a gas such as air or nitrogen, or a liquid such as water or oil.

[0015] Preferably, the perforation is located in the center of the rear side wall of the chamber;

[0016] The longitudinal section of the piston column is in an I-shaped shape with wide front and rear end surfaces and narrow side peripheral walls. The wide front and rear end surfaces can ensure a certain buffer area and prevent the piston column from accidentally leaving the base.

[0017] Preferably, the chamber in the base has a circle wall extending frontward and rearward, and the rear peripheral edges of the circle wall are joined to form the above-mentioned rear side wall;

[0018] The edge of the front end surface of the piston rod is adjacent to the circle wall and is spaced opposite to the circle wall.

[0019] This ensures that the piston rod can move smoothly and at the same time ensures the buffer area of ​​the fluid for the front end surface of the piston rod.

[0020] Furthermore, the inner diameter of the ring wall is 16-26 mm; the distance between the edge of the front end surface of the piston column and the corresponding ring wall is 0.5-1 mm.

[0021] Furthermore, the depth of the chamber in the front-to-back direction is 5-10 mm, thereby ensuring that sufficient fluid can be stored in the chamber to provide buffering.

[0022] Preferably, the diameter of the rear end surface of the piston column is larger than the diameter of the front end surface.

[0023] Furthermore, the diameter of the rear end surface of the piston column is 20-30 mm, and the diameter of the front end surface of the piston column is 15-25 mm.

[0024] In order to further improve the buffering effect, preferably, an elastic member is also included to act on the piston column so that the piston column always has a tendency to move forward.

[0025] Furthermore, the elastic member is a spring, which is circumferentially sleeved on the outer circumference of the piston column, and both ends of the spring abut between the rear end surface of the piston column and the rear side wall of the base.

[0026] In this way, when the range hood vibrates, the reaction force generated by the wall on the range hood first acts on the rear end face of the piston column and then is transmitted to the spring. The spring is compressed to provide a first-time buffer. Then the force is transmitted to the front end face of the piston column to squeeze the fluid in the base forward. The fluid in the base is compressed to provide a second-time buffer. The reaction force of the wall on the range hood is alleviated by two-stage buffering, thereby further reducing the vibration of the range hood.

[0027] In the above schemes, preferably, the following is also included:

[0028] The oil cup constrained on the box body has an oil receiving cavity with an opening facing upwards, and is used to receive the oil in the box body;

[0029] An oil pipe, a first end of which is located in the oil receiving cavity and a second end of which is connected to the cavity in the base;

[0030] The valve is arranged on the oil pipe and is used to open or cut off the passage in the oil pipe. When the passage is open, the oil pipe is arranged to transport the oil in the oil cup as the above-mentioned fluid to the chamber of the base or to output the fluid in the chamber to the oil cup.

[0031] That is, the utility model can use the oil in the oil cup as the fluid to be input into the base; when the fluid in the base is large, part of the fluid in the base can be output into the oil cup, which is convenient for use.

[0032] Furthermore, an oil pump is provided on the oil pipe for driving the oil in the oil cup to be input into the chamber through the oil pipe.

[0033] Furthermore, a filter screen is provided in the first end of the oil pipe to prevent impurities in the oil cup from entering the oil pipe.

[0034] Preferably, the second end of the oil pipe faces upward and opens to the bottom wall of the chamber to connect the oil pipe with the chamber; the first end of the oil pipe faces downward and is located below the second end.

[0035] Preferably, the oil cup is arranged at the bottom of the box body and below the foot pad; the first end of the oil pipe is inserted into the oil cup through the opening.

[0036] Furthermore, it also includes a liquid volume detector for detecting the amount of fluid in the base, and a controller for receiving an output signal of the liquid volume detector, and the controller is electrically connected to the valve and the oil pump. In this way, the opening and closing of the valve and the operation of the oil pump can be controlled according to the amount of fluid in the base.

[0037] Compared with the prior art, the advantage of the utility model is that when the range hood is working and the fan system drives the box to vibrate, the rear end face of the piston column contacts the wall, so that the reaction force generated by the wall on the range hood acts on the rear end face of the piston column, so that the piston column moves forward relative to the base. At this time, the fluid in the base chamber will provide a buffer to alleviate the reaction force of the wall on the range hood and reduce the vibration of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0039] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0040] Figure 3 for Figure 2 Enlarged view of part A in the middle. DETAILED DESCRIPTION

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0042] like Figures 1 to 3 As shown in FIG. 1 , a preferred embodiment of a range hood of the utility model is shown. The range hood comprises a housing 1 , a fan system, a foot member 2 , an oil cup 3 , an oil pipe 4 and an oil pump 5 .

[0043] The side of the box body 1 facing the user is the front side. The box body 1 is hollow inside to form a chamber 10. The front side wall of the chamber 10 is tilted backward from top to bottom and is provided with a smoke inlet 10a. A smoke baffle 12 capable of opening and closing the smoke inlet 10a is provided at the smoke inlet 10a. The smoke baffle 12 is rotatably arranged at the smoke inlet around its upper edge extending left and right or an axis adjacent to the upper edge. When the smoke inlet 10a is open, the smoke baffle 12 is located above the smoke inlet 10a and tilted forward from top to bottom. A smoke outlet is provided in the center of the top wall of the chamber 10 (not shown in the figure). At the same time, the box body 1 has a back side 11 for facing the wall, and the back side 11 faces backward.

[0044] The fan system is arranged in the box 1, and is used to drive the oil smoke flow into the chamber 10 through the smoke inlet 10a and discharged through the smoke outlet. In this embodiment, the fan system adopts an existing centrifugal fan, and its structure and installation position refer to the existing technology, which will not be described here, and is not shown in the figure.

[0045] There are two foot pads 2, one on the left and one on the right, arranged on the back of the box body 1. Each foot pad 2 includes a base 21, a piston rod 22 and an elastic member. The base 21 is hollow inside to form a chamber 210 filled with oil. The chamber 210 has a circle wall 213 extending forward and backward. The rear peripheral edges of the circle wall 213 are joined to form a rear side wall 211 of the chamber 210. The center of the rear side wall 211 is provided with a through hole 212 that penetrates the wall thickness. In this embodiment, the inner diameter of the circle wall 213 is 16 to 26 mm (can be any value between 16 and 26 mm, such as 16 mm, 20 mm, 25 mm, 26 mm, etc.). The depth of the chamber 210 in the front-to-back direction is 5 to 10 mm (can be any value between 5 and 10 mm, such as 5 mm, 7 mm, 9 mm, 10 mm, etc.) to ensure that sufficient oil can be stored in the chamber 210 for buffering.

[0046] The piston column 22 extends forward and backward, and the longitudinal section is an I-shaped with wide front and rear end faces and narrow side circumferential wall 221. The side circumferential wall 221 of the piston column 22 is arranged in the through hole 212 in an axially movable manner, and is directly attached to the inner wall surface of the through hole 212 or indirectly attached through a sealing ring, so that the chamber 210 is in a closed state; the front end face 222 of the piston column 22 is located in the chamber 210, and the edge of the front end face 222 is adjacent to the circle wall 213 and is spaced opposite to the circle wall 213. Specifically, the diameter of the front end face 222 is 15 to 25 mm (smaller than the inner diameter of the circle wall 213), and the distance between the edge of the front end face 222 and the corresponding circle wall 213 is 0.5 to 1 mm, so that the piston column 22 can move smoothly. The rear end face 223 of the piston column 22 is located outside the chamber 210 and protrudes relative to the back side 11 of the box body 1, and is used to contact the wall. In this embodiment, the diameter of the rear end surface 223 is greater than the diameter of the front end surface 222 , and the diameter of the rear end surface 223 is 20-30 mm.

[0047] The elastic member 23 acts on the piston column 22 so that the piston column 22 always has a tendency to move forward. Specifically, the elastic member 23 is a spring, which is circumferentially sleeved on the outer circumference of the piston column 22, and the two ends of the spring abut between the rear end surface 223 of the piston column 22 and the rear side wall 211 of the base 21. When the spring is not compressed, its length in the front-to-back direction is 5 to 10 mm.

[0048] In this way, when the range hood vibrates, the reaction force generated by the wall on the range hood first acts on the rear end face 223 of the piston column 22 and then is transmitted to the spring. The spring is compressed to provide a first-time buffer. Then the force is transmitted to the front end face 222 of the piston column 22 to squeeze the oil in the base 21 forward. The oil in the base is compressed to provide a second-time buffer. The reaction force of the wall on the range hood is alleviated by two-stage buffering, thereby further reducing the vibration of the range hood.

[0049] The oil cup 3 is arranged at the bottom of the box body 1 and below the foot pad 2, and has an oil receiving cavity 30 with an opening facing upwards, for receiving the oil in the box body 1. The first end of the oil pipe 4 faces downwards and is inserted into the oil receiving cavity 30 through the opening, and a filter screen 41 is arranged in the first end of the oil pipe 4. For details, please refer to Figure 2 The second end of the oil pipe 4 faces upward and opens to the bottom wall of the chamber 210 to connect the oil pipe 4 and the chamber 210, and a valve for opening or closing the passage is provided at the connection point. The oil pump 5 is provided on the oil pipe 4 to drive the oil in the oil cup 3 to be input into the chamber 210 through the oil pipe 4.

[0050] At the same time, the range hood of this embodiment also includes a liquid level detector (known technology) for detecting the amount of oil in the base 21 and a controller for receiving an output signal of the liquid level detector. The controller is electrically connected to a valve (such as a solenoid valve) and an oil pump 5.

[0051] The base 21 has a built-in liquid level detector to ensure that the amount of oil in the base 21 is maintained at 3 / 5 to 4 / 5 of the volume of the chamber 210 to ensure a stable buffering effect. The base chamber 210 reserves 3 / 5 of the volume of the chamber 210 in the initial state to ensure normal use when there is no oil to be sucked in the oil cup in the initial stage. When the amount of oil in the chamber 210 is more than the above range (3 / 5 to 4 / 5), the valve in the oil pipe 4 opens to discharge the oil into the oil cup 3; when the amount of oil is less than the above range (3 / 5 to 4 / 5), the micro oil pump 5 in the oil pipe 4 absorbs the oil in the oil cup 3 into the base. When the liquid level detector detects that the amount of oil in the base is less than 3 / 5 of the volume of the chamber 210 or greater than 4 / 5 of the volume of the chamber 210 for a time of ≥24h due to insufficient oil in the oil cup or blockage of the filter 41, the liquid level detector will emit a beeping sound to remind the user to handle it, add liquid to the oil cup or replace the filter.

[0052] 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.

Claims

1. A range hood, comprising: The box body (1) is hollow inside to form a cavity (10) with a smoke inlet (10a) and a smoke outlet, and the box body (1) has a back side (11) facing the wall, and the back side (11) faces backwards; A fan system is disposed in the cavity (10) and is used to drive the oil smoke flow to be sucked into the cavity (10) through the smoke inlet (10a) and discharged through the smoke outlet; A foot pad (2) provided on the back side (11) of the box body (1); Features The foot pad (2) comprises: A base (21) having a hollow interior to form a chamber (210) filled with a fluid, wherein a rear side wall (211) of the chamber (210) is provided with a through hole (212) penetrating the wall thickness; A piston column (22) extending forward and backward, its side wall (221) is inserted into the through hole (212) in an axially movable manner and is directly or indirectly attached to the inner wall surface of the through hole (212) so that the chamber (210) is in a closed state, its front end surface (222) is located in the chamber (210), and its rear end surface (223) is located outside the chamber (210) and protrudes relative to the back side (11) of the box body (1) for contacting the wall.

2. The range hood according to claim 1, characterized in that: The through hole (212) is located at the center of the rear side wall (211) of the chamber (210); The longitudinal section of the piston column (22) is in an I-shape with wide front and rear end surfaces and narrow side peripheral walls (221).

3. The range hood according to claim 2, characterized in that: The chamber (210) in the base (21) has a circle wall (213) extending forward and backward, and the rear peripheral edges of the circle wall (213) are joined to form the rear side wall (211); The edge of the front end surface (222) of the piston column (22) is adjacent to the circle wall (213) and is spaced apart from and opposite to the circle wall (213).

4. The range hood according to claim 3, characterized in that: The inner diameter of the circle wall (213) is 16 to 26 mm; the distance between the edge of the front end surface (222) of the piston column (22) and the corresponding circle wall (213) is 0.5 to 1 mm.

5. The range hood according to claim 4, characterized in that: The depth of the chamber (210) in the front-to-back direction is 5 to 10 mm.

6. The range hood according to claim 2, characterized in that: The diameter of the rear end surface (223) of the piston column (22) is greater than the diameter of the front end surface (222).

7. The range hood according to claim 6, characterized in that: The diameter of the rear end surface (223) of the piston column (22) is 20 to 30 mm, and the diameter of the front end surface (222) of the piston column (22) is 15 to 25 mm.

8. The range hood according to claim 2, characterized in that: The invention also comprises an elastic member (23) which acts on the piston column (22) so that the piston column (22) always has a tendency to move forward.

9. The range hood according to claim 8, characterized in that: The elastic member (23) is a spring which is sleeved on the outer periphery of the piston column (22) along the circumferential direction, and the two ends of the spring abut between the rear end surface (223) of the piston column (22) and the rear side wall (211) of the base (21).

10. The range hood according to any one of claims 1 to 9, characterized in that: Also included are: An oil cup (3) constrained on the box body (1) has an oil receiving cavity (30) with an opening facing upwards, and is used to receive the oil in the box body (1); An oil pipe (4), a first end of which is located in the oil receiving cavity (30) and a second end of which is connected to a cavity (210) in the base (21); The valve is arranged on the oil pipe (4) and is used to open or close the passage in the oil pipe (4); and when the passage is open, the oil pipe (4) is arranged to be able to transport the oil in the oil cup (3) as the above-mentioned fluid to the chamber (210) of the base (21) or to output the fluid in the chamber (210) to the oil cup (3).

11. The range hood according to claim 10, characterized in that: The oil pipe (4) is provided with an oil pump (5) for driving the oil in the oil cup (3) to be input into the chamber (210) through the oil pipe (4).

12. The range hood according to claim 11, characterized in that: A filter screen (41) is provided inside the first end of the oil pipe (4).

13. The range hood according to claim 10, characterized in that: The second end of the oil pipe (4) faces upward and opens to the bottom wall of the chamber (210) to connect the oil pipe (4) and the chamber (210); the first end of the oil pipe (4) faces downward and is located below the second end.

14. The range hood according to claim 13, characterized in that: The oil cup (3) is arranged at the bottom of the box body (1) and below the foot pad (2); the first end of the oil pipe (4) is inserted into the oil cup (3) through the opening.

15. The range hood according to claim 11, characterized in that: It also includes a liquid volume detector for detecting the volume of fluid in the base (21) and a controller for receiving an output signal of the liquid volume detector, wherein the controller is electrically connected to the valve and the oil delivery pump (5).

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