Range hood

Abstract

The utility model discloses a range hood which comprises an oil cup, a fan frame, a liquid level detection part used for detecting the liquid level in the oil cup and an air inlet assembly capable of moving up and down relative to the fan frame, at least part of the air inlet assembly is located below the fan frame, and the oil cup is arranged at the bottom of the air inlet assembly. The liquid level detection component is a magnetic floater liquid level meter; the liquid level detection part comprises a magnetic floater and a circuit board matched with the magnetic floater, the circuit board is fixed relative to the fan frame, and the range hood can be in the following states: in a working state, the air inlet assembly descends relative to the fan frame, and the liquid level detection part is positioned above the oil cup; and in a non-working state, the air inlet assembly ascends relative to the fan frame, and the magnetic floater is located in the oil cup.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to an oil fume extractor. Background Art

[0002] As an indispensable kitchen appliance in every family, the range hood sucks in oil fume from the air inlet through the high-speed rotating impeller in the volute, filters the oil fume with the impeller, and discharges the filtered oil fume from the air outlet to complete the kitchen air purification work. Reasonable air inlet setting is conducive to improving the oil fume absorption effect, reducing the escape of oil fume, and improving the air quality in the kitchen.

[0003] The oil cup level detection of the range hood is a very meaningful function. There are many patents that disclose this technology in the prior art, such as application numbers 201821981083.7, 201220449832.8, etc. However, the existing detection devices have the following disadvantages:

[0004] 1) High assembly requirements. For example, the external capacitive liquid level detection device requires the detection device to fit tightly with the oil cup, and requires a special structure to achieve contact reliability. For example, the weighing type uses weight changes to cause elastic deformation and generate electrical signals to feed back to the control board, which has high assembly requirements and low accuracy.

[0005] 2) It is not easy to disassemble and assemble. When the oil cup capacity reaches the limit, it needs to be disassembled and assembled, and the working state needs to be closely fitted with the detection device, which makes the operation experience unfriendly;

[0006] 3) The detection device is far away from the main circuit board of the range hood, which makes wiring troublesome. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a range hood which can detect the liquid level of the oil cup and is convenient for disassembling and assembling the oil cup in view of the deficiencies in the above-mentioned prior art.

[0008] The utility model solves the above technical problems by adopting the following technical solution: a range hood, comprising an oil cup, a fan frame, a liquid level detection component for detecting the liquid level in the oil cup, and an air inlet assembly capable of moving up and down relative to the fan frame, wherein the air inlet assembly is at least partially located under the fan frame, the oil cup is arranged at the bottom of the air inlet assembly, and the liquid level detection component is a magnetic float liquid level gauge; the characteristics are:

[0009] The liquid level detection component includes a magnetic float and a circuit board matched with the magnetic float, the circuit board is fixed relative to the fan frame, and the range hood can be in the following states:

[0010] In the working state, the air inlet assembly is lowered relative to the fan frame, and the liquid level detection component is located above the oil cup;

[0011] In a non-working state, the air inlet assembly rises relative to the fan frame, and the magnetic float is located in the oil cup.

[0012] By fixing the liquid level detection component to a fixed fan frame, and the oil cup to an air inlet assembly that is lifted and lowered relative to the fan frame, the liquid level detection component can be located in the oil cup to detect the liquid level only when the range hood is not in operation, and can be separated from the oil cup as a whole when the range hood is in operation, thereby making it convenient to disassemble and assemble the oil cup, replace the oil cup, or pour out the oil, etc.; in addition, the assembly is simple, and during production, it is only necessary to insert the liquid level detection component into the fan frame and then fix it with screws, etc.; in addition, if the oil cup needs to be hidden, the liquid level detection component will not affect this.

[0013] Furthermore, the liquid level detection component also includes a sleeve, the upper end of the sleeve is fixed to the top of the fan frame, the lower end of the sleeve passes through the fan frame and extends downward, the circuit board is fixed in the sleeve, and the magnetic float is sleeved on the outer periphery of the lower end of the sleeve and can be raised and lowered relative to the sleeve, so that the sleeve can provide a mounting base for the circuit board and the magnetic float.

[0014] In order to prevent the magnetic float from falling, the liquid level detection component also includes a limit column for limiting the lower limit position of the magnetic float.

[0015] Preferably, the limiting column includes an integrated first column and a second column, the first column is inserted into and fixed in a sleeve, the outer diameter of the second column is larger than the outer diameter of the sleeve, the magnetic float is sleeved on the outer periphery of the limiting column, a step portion is formed in the magnetic float, and the step portion is supported on the upper surface of the second column.

[0016] Furthermore, in order to facilitate the transmission of signals from the circuit board, a main power board is provided on the top outer side of the fan rack, and the liquid level detection component also includes a wire, one end of which is connected to the circuit board, and the other end of the wire passes through the upper end of the sleeve and the fan rack to be connected to the main power board.

[0017] Preferably, the main power board is located adjacent to the fixed positions of the bushing and the fan rack, thereby making the wiring structure simple, and preferably, the electrical connection can be achieved by plugging.

[0018] In order to protect the main power board, an electrical box is also arranged on the top outer side of the fan frame, and the main power board is arranged in the electrical box.

[0019] Preferably, the air inlet assembly includes a smoke collecting hood, the front side of the smoke collecting hood is provided with an air inlet, and the air inlet assembly also includes a smoke baffle capable of opening and closing the air inlet.

[0020] Furthermore, in order to hide the oil cup, the oil cup is arranged at the rear bottom of the smoke collecting hood, and when the smoke baffle is closed, the oil cup is located above the smoke baffle.

[0021] Preferably, the range hood further comprises a shell, which is relatively fixed to the fan frame. When the range hood is in a non-working state, the shell covers the outer peripheral sides of the fume hood and the fan frame to prevent the connection between the fume hood and the fan frame from being exposed.

[0022] Compared with the prior art, the advantages of the utility model are: by fixing the liquid level detection component to a fixed fan frame, and the oil cup to an air inlet assembly which is lifted and lowered relative to the fan frame, the liquid level detection component can be located in the oil cup to detect the liquid level only when the range hood is not in operation, and can be separated from the oil cup as a whole when the range hood is in operation, thereby facilitating the disassembly and assembly of the oil cup, replacement of the oil cup or pouring of the oil at this time; in addition, the assembly is simple, and during production, it is only necessary to insert the liquid level detection component into the fan frame and then fix it with screws, etc.; in addition, if the oil cup needs to be hidden, the liquid level detection component will not affect this. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the working state of the range hood according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the range hood according to an embodiment of the utility model;

[0025] Figure 3 A cross-sectional view of the range hood in working state according to an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of a liquid level detection component of a range hood according to an embodiment of the utility model;

[0027] Figure 5 A partial cross-sectional view of a liquid level detection component of a range hood according to an embodiment of the utility model;

[0028] Figure 6 It is a schematic diagram of a range hood in a non-working state according to an embodiment of the utility model;

[0029] Figure 7 This is a cross-sectional view of the range hood in a non-working state according to an embodiment of the utility model. DETAILED DESCRIPTION

[0030] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration 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. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0032] See also Figure 1 to Figure 5 A range hood includes an air inlet assembly 1, an oil cup 2, a fan frame 3, a fan system 4, a housing 5 and a liquid level detection component 6.

[0033] The air inlet assembly 1 includes a smoke hood 11 and a smoke baffle 12. The front side of the smoke hood 11 can be gradually tilted backward from top to bottom, and an air inlet 111 is arranged thereon. The smoke baffle 12 can open and close the air inlet 111. The movement form of the smoke baffle 12 is not limited, such as the common opening and closing by flipping. The oil cup 2 is arranged at the rear bottom of the smoke hood 11. When the smoke baffle 12 is closed, it can be in a horizontal state, closed at the bottom of the smoke hood 11, and the oil cup 2 is closed above the smoke baffle 12 to hide the oil cup 2. The oil cup 2 can be installed at the bottom of the smoke hood 11 through a commonly used installation structure, and can be pulled back and forth to achieve taking and placing.

[0034] The fume hood 11 is at least partially located below the fan frame 3. The fume hood 11 may be wrapped around the outer periphery of the fan frame 3 and may move up and down relative to the fan frame 3. The movement mechanism for driving the fume hood 11 to move up and down may adopt the mechanism of an existing lifting range hood. The fan system 4 is arranged in the fan frame 3, such as a centrifugal fan (the complete fan system is not shown in the figure).

[0035] The housing 5 is relatively fixed to the fan frame 3. When the range hood is not in operation, Figure 6 and Figure 7 The outer shell 5 can cover the outer peripheral sides of the smoke collecting hood 11 and the fan frame 3 (i.e., the top of the fan frame 3 and the bottom of the smoke collecting hood 11). When the range hood is in operation, the air inlet assembly 1 descends relative to the outer shell 5, so a portion of it is exposed downward from the outer shell 5.

[0036] The liquid level detection component 6 can be fixed to the fan frame 3, and one end thereof passes through the fan frame 3 upwards, where it is fixed to the fan frame 3 by screws. An electrical box 31 is arranged on the outer side of the top of the fan frame 3, and the electrical box 31 is arranged adjacent to the fixed position, so that the liquid level detection component 6 can be electrically connected to the main power board 32 in the electrical box 31 nearby. The liquid level detection component 6 includes a sleeve 61, a magnetic float 62, a limit column 63, a circuit board 64 and a wire 65. The sleeve 61 can be a steel pipe, which is roughly cylindrical, and its upper end is fixed to the top of the fan frame 3, and the lower end passes through the fan frame 3 and extends downward. The magnetic float 62 is also cylindrical and is arranged at the lower end of the sleeve 61. The magnetic float 62 is partially sleeved on the outer periphery of the sleeve 61 and can be raised and lowered relative to the sleeve 61, so as to facilitate floating to different positions at different liquid levels.

[0037] The limiting column 63 defines the lower limit position of the magnetic float 62, and includes an integrated first column 631 and a second column 632. The outer diameter of the first column 631 is equal to or slightly smaller than the inner diameter of the sleeve 61, and is inserted into and fixed in the sleeve 61. The outer diameter of the second column 632 is larger than the outer diameter of the sleeve 61 and also larger than the outer diameter of the first column 631. The magnetic float 62 is sleeved on the outer periphery of the limiting column 63, and a step portion 621 is formed in the magnetic float 62. The step portion 621 can be supported on the upper surface of the second column 632, thereby preventing the magnetic float 62 from falling downward.

[0038] The circuit board 64 is fixedly disposed in the sleeve 61 , close to the magnetic float 62 . One end of the wire 65 is connected to the circuit board 64 , and the other end extends upward along the sleeve 61 to the fan frame 3 and can be connected to the main power board 32 in the electrical box 31 .

[0039] See also Figure 7 When the range hood is not in operation, the magnetic float 62 is located in the oil cup 2. When the liquid level in the oil cup 2 rises, the magnetic float 62 is acted upon by buoyancy and moves upward along the sleeve 61. The magnetism of the magnetic float 62 itself changes the resistance value of the sensor connection on the circuit board 64 (such as the reed switch is turned on and off to change the resistance value of the connected overall circuit), thereby generating an electrical signal to be transmitted to the main power board 32. The principle of the magnetic float and the circuit board 64 cooperating to detect the liquid level is the same as that of the existing magnetic float level gauge, such as the patent mentioned in the background technology.

[0040] In the initial state, the bottom of the magnetic float 62 is close to the bottom of the oil cup 2, and the initial position is determined by the contact surface between the limit column 63 and the magnetic float 62. When the amount of oil in the oil cup 2 increases, the liquid level continues to rise, and the magnetic float 62 rises due to the buoyancy, and finally the liquid level detection component 6 generates a changing electrical signal, which is converted to calculate the volume of the liquid in the oil cup 2, thereby realizing the capacity detection function.

[0041] See also Figure 3When the range hood is in operation, the fume hood 11 drops to the lowest position, at which time the oil cup 2 is separated from the liquid level detection component 6, and the liquid level detection component 6 is completely located above the oil cup 2, so the oil cup 2 can be horizontally slid out without interfering with the magnetic float 62.

Claims

1. A range hood, comprising an oil cup (2), a fan frame (3), a liquid level detection component (6) for detecting the liquid level in the oil cup (2), and an air inlet assembly (1) capable of moving up and down relative to the fan frame (3), wherein at least part of the air inlet assembly is located below the fan frame (3), the oil cup (2) is arranged at the bottom of the air inlet assembly (1), and the liquid level detection component (6) is a magnetic float liquid level gauge; characterized in that: The liquid level detection component (6) comprises a magnetic float (62) and a circuit board (64) matched with the magnetic float (62); the circuit board (64) is fixed relative to the fan frame (3); and the range hood can be in the following states: In the working state, the air inlet assembly (1) is lowered relative to the fan frame (3), and the liquid level detection component (6) is located above the oil cup (2); In a non-operating state, the air inlet assembly (1) rises relative to the fan frame (3), and the magnetic float (62) is located in the oil cup (2).

2. The range hood according to claim 1, characterized in that: The liquid level detection component (6) further comprises a sleeve (61), the upper end of the sleeve (61) being fixed to the top of the fan frame (3), the lower end of the sleeve (61) passing through the fan frame (3) and extending downward, the circuit board (64) being fixed in the sleeve (61), and the magnetic float (62) being sleeved on the outer periphery of the lower end of the sleeve (61) and being able to rise and fall relative to the sleeve (61).

3. The range hood according to claim 2, characterized in that: The liquid level detection component (6) also includes a limit column (63) for limiting the lower limit position of the magnetic float (62).

4. The range hood according to claim 3, characterized in that: The limiting column (63) comprises an integrated first column (631) and a second column (632), wherein the first column (631) is inserted into and fixed in the sleeve (61), and the outer diameter of the second column (632) is greater than the outer diameter of the sleeve (61), and the magnetic float (62) is sleeved on the outer periphery of the limiting column (63), and a step portion (621) is formed in the magnetic float (62), and the step portion (621) is supported on the upper surface of the second column (632).

5. The range hood according to claim 2, characterized in that: A main power board (32) is arranged on the outer side of the top of the fan frame (3), and the liquid level detection component (6) also includes a wire (65), one end of the wire (65) is connected to the circuit board (64), and the other end of the wire (65) passes through the upper end of the sleeve (61) and the fan frame (3) to be connected to the main power board (32).

6. The range hood according to claim 5, characterized in that: The main power supply board (32) is located adjacent to the fixed positions of the bushing (61) and the fan frame (3).

7. The range hood according to claim 5 or 6, characterized in that: An electrical box (31) is also provided on the outside of the top of the fan frame (3), and the main power board (32) is provided in the electrical box (31).

8. The range hood according to claim 1, characterized in that: The air intake assembly (1) comprises a smoke collecting hood (11), the front side of the smoke collecting hood (11) is provided with an air intake (111), and the air intake assembly (1) further comprises a smoke baffle (12) capable of opening and closing the air intake (111).

9. The range hood according to claim 8, characterized in that: The oil cup (2) is arranged at the rear bottom of the smoke collecting hood (11); when the smoke baffle (12) is closed, the oil cup (2) is located above the smoke baffle (12).

10. The range hood according to claim 8, characterized in that: The range hood further comprises a casing (5), wherein the casing (5) is relatively fixed to the fan frame (3); when the range hood is in a non-operating state, the casing (5) covers the outer peripheral side surfaces of the fume collecting hood (11) and the fan frame (3).

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