Range hood

Abstract

The utility model relates to a range hood which comprises a machine shell, an air inlet is formed in the machine shell, and an oil screen used for filtering oil smoke is arranged at the air inlet or in the machine shell; the smoke baffle is driven by a driving mechanism to be rotationally arranged on the machine shell and can open and close the air inlet; the electric heating device is used for heating the oil screen; the control switch is electrically connected with a controller of the range hood and the electric heating device, is provided with a triggering part and is configured to send a signal to the controller when the external force applied to the triggering part reaches a set pressure threshold value, so that the controller controls a power supply loop where the electric heating device is located to be communicated; when the smoke barrier is in the state of closing the air inlet, the driving mechanism or the smoke barrier triggers the triggering part of the control switch and enables a power supply loop where the electric heating device is located to be communicated. The range hood has the advantages that the oil screen can be automatically heated after the range hood is used, so that the attachment of oil stains on the oil screen is reduced.

Description

Technical Field

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

[0002] Range hoods are kitchen appliances that purify the kitchen environment. After prolonged use, the oil screen often accumulates a large amount of grease, making it difficult to clean. Traditional cleaning methods require opening the chassis and removing the oil screen or other components. However, this method is time-consuming and labor-intensive, resulting in a poor user experience.

[0003] In order to solve the problem that the above-mentioned oil net is difficult to clean, the "An Oil Filter Net for Range Hood" with application number CN201721251621.2 and the "Ranger Hood" with application number CN202220693171.7 both disclose a solution of arranging an electric heating element on the oil net to accelerate the melting of condensed oil on the oil net and improve the cleaning effect of the oil net.

[0004] However, the range hood in the above patent application still has certain shortcomings: the heating element arranged on the above range hood needs to be tilted by the user separately by activating the corresponding control switch or activating the corresponding cleaning mode of the range hood. However, usually after using the range hood, the user often forgets to activate the heating element, so that the oil that has not dripped on the oil net will quickly condense, causing more and more oil stains on the oil net, and even to the point where the oil stains cannot be effectively removed after activating the heating element.

[0005] Therefore, existing range hoods also need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood which can automatically heat the oil net after the range hood is used to reduce the adhesion of oil stains on the oil net in response to the current status of the existing technology.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a range hood comprising:

[0008] The casing is provided with an air inlet, and an oil net for filtering oil smoke is provided at the air inlet or inside the casing;

[0009] A smoke baffle, driven by a driving mechanism to rotate on the housing and capable of opening and closing the air inlet;

[0010] Electric heating device, used to heat the oil net;

[0011] It also includes a control switch electrically connected to the controller of the range hood and the above-mentioned electric heating device. The control switch has a trigger part and is configured to send a signal to the controller when the trigger part is subjected to external pressure to reach a set pressure threshold so that the controller controls the power supply circuit where the above-mentioned electric heating device is connected, and to send a signal to the controller when the trigger part is subjected to external pressure less than the set pressure threshold so that the controller controls the power supply circuit where the above-mentioned electric heating device is disconnected. When the smoke shield is in a state where the air inlet is closed, the drive mechanism or the smoke shield triggers the trigger part of the control switch and connects the power supply circuit where the electric heating device is located. When the smoke shield is in a state where the air inlet is opened, the drive mechanism or the smoke shield releases the pressure on the trigger part of the control switch and disconnects the power supply circuit where the electric heating device is located.

[0012] As an improvement, the control switch is a piezoelectric switch.

[0013] The electric heating device can generally adopt an electric heating element that directly contacts the oil mesh to transfer heat, such as an electric heating wire, an electric heating tube, etc., or it can adopt a method of heating the oil mesh by heating the corresponding fluid medium and then bringing the heated medium into contact with the oil mesh, such as heating the oil mesh by blowing hot air. In order to improve the heating efficiency, preferably, the electric heating device includes an electric heating element for heating the oil mesh, and the electric heating element is an electric heating wire arranged on the oil mesh.

[0014] In order to ensure the overall aesthetics of the range hood, especially the oil screen, the electric heating wire is arranged on the side of the oil screen facing the inside of the casing.

[0015] As an improvement, the front side wall of the casing is inclined from top to bottom and backward, and the air inlet is opened on the front side wall of the casing.

[0016] As an improvement, the bottom of the casing is further provided with an oil cup for collecting oil flowing down from the front side wall of the casing.

[0017] As an improvement, the smoke baffle is rotatably connected to the housing via a rocker, and the driving mechanism includes:

[0018] Drive motor;

[0019] The connecting rod assembly includes a first connecting rod and a second connecting rod. The first end of the first connecting rod is connected to the output shaft of the driving motor and deflects back and forth around an axis extending left and right under the drive of the driving motor. The second end of the first connecting rod is rotationally connected to the first end of the second connecting rod, and the second end of the second connecting rod is rotationally connected to the rocker.

[0020] In order to flexibly drive the smoke deflector to deflect, the axis extending left and right at the first end of the rocker is rotatably connected to the casing, the second end of the rocker is connected to the smoke deflector, and the position where the second end of the second connecting rod is rotatably connected to the rocker is adjacent to the second end of the rocker.

[0021] As an improvement, when the smoke shield is in a state of closing the air inlet, the first connecting rod of the driving mechanism triggers the triggering portion of the control switch. It is conceivable that the piezoelectric switch can also be arranged at the air inlet, with the triggering portion of the piezoelectric switch facing the back of the smoke shield. When the smoke shield closes the air inlet, the smoke shield triggers the piezoelectric switch to activate the electric heating device.

[0022] After the oil net is heated, in order to thoroughly clean the oil net, a spray pipe is further provided in the housing, and the spray port on the spray pipe faces the oil net.

[0023] Compared with the prior art, the advantages of the present invention are as follows: after the range hood is turned off, the driving mechanism can drive the smoke shield to close the air inlet. After the smoke shield is closed in place, the driving mechanism or the smoke shield triggers the trigger part of the control switch and connects the power supply circuit where the electric heating device is located, thereby realizing automatic start-up of the electric heating device, timely heating the oil net, reducing the condensation of oil on the oil net, and facilitating the user's later cleaning operation of the oil net. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a range hood according to an embodiment of the present utility model;

[0025] Figure 2 This is a right side view of the range hood according to an embodiment of the present invention (the right side panel of the fume hood is omitted);

[0026] Figure 3 This is a vertical sectional perspective view of the range hood according to an embodiment of the present invention cut along the front-to-back direction. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0029] Figure 1-Figure 3 A preferred embodiment of the range hood of the present invention is shown. The range hood includes a housing 10 and a centrifugal fan 13 disposed within the housing 10. The housing 10 generally includes a fan frame 11 and a fume hood 12 disposed at the bottom of the fan frame 11. The interior of the fan frame 11 communicates with the interior of the fume hood 12. An air inlet 120 is provided on the front side wall of the fume hood 12, through which external smoke can enter the fume hood 12. The centrifugal fan 13 is disposed within the fan frame 11. When in operation, the centrifugal fan 13 generates negative pressure, allowing external oil smoke to be drawn into the fume hood 12 through the air inlet 120. An oil screen 121 is also provided at the air inlet 120 of the fume hood 12 for filtering oil smoke. An oil cup 15 is provided at the bottom of the fume hood 12. The oil cup 15 is a long strip extending from side to side, and is used to collect oily dirt flowing down from the fume hood 12. The front of the smoke hood 12 is also provided with a smoke baffle 14 that can be deflected 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 rocker 43. Specifically, it can be deflected forward to open the above-mentioned air inlet 120 and deflected backward to block and close the above-mentioned air inlet 120.

[0030] The front side wall of the smoke hood 12 is tilted backward from top to bottom, and the air inlet 120 and the oil net 121 provided at the air inlet 120 are also tilted backward from top to bottom. Specifically, the air inlet 120 is a strip-shaped opening extending in the left-right direction.

[0031] The rocker 43 is a C-shaped structure, with a first end rotatably connected to the smoke collecting hood 12 via a pin extending left and right, and a second end connected to the smoke plate bracket 141 on the back side of the smoke baffle 14 .

[0032] The smoke baffle 14 is driven by a driving mechanism and can deflect back and forth around an axis extending left and right relative to the smoke hood 12. The driving mechanism includes a driving motor 41, a first connecting rod 421, and a second connecting rod 422. The first end of the first connecting rod 421 is connected to the output shaft of the driving motor 41, and deflects back and forth around an axis extending left and right under the drive of the driving motor 41. The second end of the first connecting rod 421 is rotationally connected to the first end of the second connecting rod 422, and the second end of the second connecting rod 422 is rotationally connected to the rocker 43. The position where the second end of the second connecting rod 422 is rotationally connected to the rocker 43 is adjacent to the second end of the rocker 43. The pin shaft to which the second end of the first connecting rod 421 is rotationally connected to the first end of the second connecting rod 422 and the pin shaft to which the second end of the second connecting rod 422 is rotationally connected to the rocker 43 also extend in the left and right directions.

[0033] The range hood of this embodiment also includes an electric heating device and a control switch 30. The electric heating device is used to heat the oil screen 121. Generally speaking, the electric heating device can be an electric heating element 20 that directly contacts the oil screen 121 to transfer heat, such as a heating wire or heating tube. Alternatively, the electric heating device can be used to heat the oil screen 121 by heating a corresponding fluid medium and then bringing the heated medium into contact with the oil screen 121, such as by blowing hot air. To improve heating efficiency, in a preferred embodiment, the electric heating device includes the electric heating element 20 for heating the oil screen 121. The electric heating element 20 is an electric heating wire disposed on the oil screen 121. To ensure the overall aesthetics of the range hood, especially the oil screen 121, the electric heating wire is disposed on the side of the oil screen 121 facing the interior of the housing 10.

[0034] The control switch 30 is preferably a piezoelectric switch, which is electrically connected to the range hood controller and the aforementioned electric heating device. The piezoelectric switch has a trigger portion 31 and is configured to send a signal to the controller when the trigger portion 31 is subjected to external pressure reaching a set pressure threshold, causing the controller to control the connection of the power supply circuit for the aforementioned electric heating device; and to send a signal to the controller when the trigger portion 31 is subjected to external pressure less than the set pressure threshold, causing the controller to control the disconnection of the power supply circuit for the aforementioned electric heating device. When the smoke damper 14 is in a state where the air inlet 120 is closed, the drive mechanism or the smoke damper 14 triggers the trigger portion 31 of the piezoelectric switch and connects the power supply circuit for the electric heating device. When the smoke damper 14 is in a state where the air inlet 120 is opened, the drive mechanism or the smoke damper 14 releases the pressure on the trigger portion 31 of the piezoelectric switch and disconnects the power supply circuit for the electric heating device.

[0035] In this embodiment, see Figure 2The piezoelectric switch is connected to the drive mechanism and is specifically located on the rear side of the drive motor 41. The trigger portion 31 of the piezoelectric switch faces downward. When the drive mechanism drives the smoke damper 14 to close the air inlet 120, the first connecting rod 421 of the drive mechanism swings rearward and upward. When the smoke damper 14 is in the state of closing the air inlet 120, the first connecting rod 421 of the drive mechanism triggers the trigger portion 31 of the piezoelectric switch. The piezoelectric switch sends a signal to the controller, which controls the power supply circuit of the electric heating device to be connected, activating the electric heating device and heating the oil screen 121 to melt the oil. It is conceivable that in other embodiments, the piezoelectric switch can also be located at the air inlet 120, with the trigger portion 31 of the piezoelectric switch facing the back side of the smoke damper 14. When the smoke damper 14 closes the air inlet 120, the smoke damper 14 triggers the piezoelectric switch to activate the electric heating device.

[0036] After the oil net 121 is heated, in order to thoroughly clean the oil net 121, a spray pipe 50 is further provided in the fume hood 12, and the spray port on the spray pipe 50 faces the oil net 121. The spray pipe 50 can be connected to an external water source (such as the water outlet of a gas water heater).

[0037] After the range hood is turned off, the driving mechanism can drive the smoke baffle 14 to close the air inlet 120. After the smoke baffle 14 is closed, the driving mechanism or the smoke baffle 14 triggers the trigger part 31 of the control switch 30 and connects the power supply circuit where the electric heating device is located, thereby realizing automatic start-up of the electric heating device and timely heating the oil net 121, reducing the condensation of oil on the oil net 121 and facilitating the user's later cleaning operation of the oil net 121.

Claims

1. A range hood comprising: The casing (10) is provided with an air inlet (120), and an oil net (121) for filtering oil smoke is provided at the air inlet (120) or inside the casing (10); A smoke baffle (14) is driven by a driving mechanism to rotate on the housing (10) and can open and close the air inlet (120); An electric heating device for heating the oil screen (121); The invention is characterized in that it further comprises a control switch (30) electrically connected to the controller of the range hood and the above-mentioned electric heating device, the control switch (30) having a trigger part (31) and being configured to send a signal to the controller when the trigger part (31) is subjected to external force pressure reaching a set pressure threshold so that the controller controls the power supply circuit where the above-mentioned electric heating device is connected, and to send a signal to the controller when the trigger part (31) is subjected to external force pressure less than the set pressure threshold so that the controller controls the power supply circuit where the above-mentioned electric heating device is disconnected, when the smoke shield (14) is in a state of closing the air inlet (120), the drive mechanism or the smoke shield (14) triggers the trigger part (31) of the control switch (30) and connects the power supply circuit where the electric heating device is located, and when the smoke shield (14) is in a state of opening the air inlet (120), the drive mechanism or the smoke shield (14) releases the pressure on the trigger part (31) of the control switch (30) and disconnects the power supply circuit where the electric heating device is located.

2. The range hood according to claim 1, characterized in that: The control switch (30) is a piezoelectric switch.

3. The range hood according to claim 1, wherein: The electric heating device comprises an electric heating element (20) for heating the oil net (121), and the electric heating element (20) is an electric heating wire arranged on the oil net (121).

4. The range hood according to claim 3, characterized in that: The electric heating wire is arranged on a side of the oil screen (121) facing the inside of the casing (10).

5. The range hood according to claim 1, characterized in that: The front side wall of the casing (10) is inclined from top to bottom and backward, and the air inlet (120) is opened on the front side wall of the casing (10).

6. The range hood according to claim 5, characterized in that: The bottom of the housing (10) is also provided with an oil cup (15) for collecting oil flowing down from the front side wall of the housing (10).

7. The range hood according to any one of claims 1 to 6, characterized in that: The smoke baffle (14) is rotatably connected to the housing (10) via a rocker (43), and the driving mechanism includes: a drive motor (41); A connecting rod assembly includes a first connecting rod (421) and a second connecting rod (422), wherein the first end of the first connecting rod (421) is connected to the output shaft of the driving motor (41) and deflects forward and backward around an axis extending left and right under the drive of the driving motor (41), the second end of the first connecting rod (421) is rotationally connected to the first end of the second connecting rod (422), and the second end of the second connecting rod (422) is rotationally connected to the rocker (43).

8. The range hood according to claim 7, characterized in that: The first end of the rocker (43) is rotatably connected to the housing (10) along an axis extending leftward and rightward, the second end of the rocker (43) is connected to the smoke baffle (14), and the position where the second end of the second connecting rod (422) is rotatably connected to the rocker (43) is adjacent to the second end of the rocker (43).

9. The range hood according to claim 7, characterized in that: When the smoke baffle (14) is in a state of closing the air inlet (120), the first connecting rod (421) of the driving mechanism triggers the triggering portion (31) of the control switch (30).

10. The range hood according to any one of claims 1 to 6, characterized in that: A spray pipe (50) is further provided in the housing (10), and a spray port on the spray pipe (50) faces the oil net (121).

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