Range hood

Abstract

The utility model discloses a range hood which comprises an exhaust fume collecting hood, a fan frame arranged on the exhaust fume collecting hood and a connecting pipe enabling fluid communication between the exhaust fume collecting hood and the fan frame, and the connecting pipe is a hose and is connected between the exhaust fume collecting hood and the fan frame. The range hood further comprises a movement mechanism capable of enabling the exhaust fume collecting hood to ascend and descend relative to the fan frame and move in the left-right direction. Compared with the prior art, the range hood has the advantages that the moving mechanism is arranged, so that the exhaust fume collecting hood rotates and ascends and descends around the rotating axis extending in the front-back direction relative to the fan frame, a negative pressure area is closer to a fume source through ascending and descending, and the position of the negative pressure area can be changed by rotating around the rotating axis extending in the front-back direction; the single-side smoke suction effect is improved, so that during single-side stir-frying cooking, the same side of the corresponding range hood can greatly improve the oil smoke suction effect and reduce oil smoke escape, the application scene is expanded, and the good oil smoke suction effect can be achieved in various scenes.

Description

Technical Field

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

[0002] The position of the smoke hood of a common range hood is usually fixed, which means that the negative pressure range of the smoke collection of the range hood is usually fixed. If the air inlet of the range hood is far away from the source of the oil smoke, the path of the oil smoke rising is long, and the oil smoke is easy to escape during the cooking process. If the height of the smoke hood of the range hood is lowered, the smoke inlet can be as close to the smoke source as possible, so that the negative pressure can be expanded downward. Although it is beneficial to the oil smoke extraction effect, it will cause the cooking operation space to be too small, affecting the cooking line of sight and the overall appearance of the kitchen.

[0003] To this end, the common method is to make the height of the fume hood adjustable so that the air inlet is in the best position. For example, the Chinese utility model patent with application number 201010168338.X discloses a lifting transparent fume hood and range hood, which includes a fan, a retractable air duct, a fume hood and a control device thereof. The top of the fume hood is connected to the lifting control device, the retractable air duct is a sleeve structure, or a bellows hose, and the lifting control device is automatically controlled by a motor or a manual pulley. In this way, the height of the fume hood can be adjusted according to the amount of oil smoke. When there is no oil smoke, the position of the fume hood is pushed up, so that the cooking space is large and the operation is convenient; when the amount of oil smoke is large during frying, the position of the fume hood is pulled down.

[0004] However, the burners of household stoves are usually divided into left and right parts. Sometimes only one burner is used in home cooking, and sometimes both burners are used at the same time. When stir-frying is carried out on the left or right side, the amount of oil smoke generated by stir-frying is large and diffuses quickly. For the simply lifting range hood, part of the oil smoke still escapes from the negative pressure zone of the cage, which will cause the oil smoke to escape to both sides of the smoke hood. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a range hood to expand the application scenarios and improve the range hood extraction effect in multiple scenarios in view of the deficiencies in the above-mentioned prior art.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, including a smoke hood, a fan frame arranged on the smoke hood, and a connecting pipe that enables fluid communication between the smoke hood and the fan frame, wherein the connecting pipe is a hose and is connected between the smoke hood and the fan frame, and is characterized in that: the range hood also includes a motion mechanism that can lift and lower the smoke hood relative to the fan frame and move it in the left and right directions.

[0007] By setting up a motion mechanism, the smoke collecting hood can be rotated and raised and lowered relative to the fan frame around the rotation axis extending in the front-to-back direction. The lifting and lowering can make the negative pressure zone closer to the smoke source, and the rotation around the rotation axis extending in the front-to-back direction can change the position of the negative pressure zone, thereby improving the single-sided smoke extraction effect. This solves the problem of single-sided stir-frying cooking. The same side of the corresponding range hood can greatly improve the oil fume extraction effect and reduce oil fume escape, thereby expanding the application scenarios and achieving better oil fume extraction effects in a variety of scenarios.

[0008] In order to enable the smoke hood to move left and right and rise and fall in the longitudinal direction relative to the fan frame, the movement mechanism includes a telescopic hanger assembly and a translation track that can translate left and right relative to the telescopic hanger assembly, the translation track is set on the smoke hood and extends left and right, the telescopic hanger assembly includes a first hanger and a second hanger that slides up and down with the first hanger, one of the first hanger and the second hanger is connected to the fan frame, and the other of the first hanger and the second hanger slides left and right with the translation track.

[0009] In order to enable the smoke hood to move left and right and rise and fall in the longitudinal direction relative to the fan frame, the telescopic hanger assemblies are provided with four, and the four telescopic hanger assemblies are respectively arranged at the four corners of the bottom of the fan frame; the translation rails are provided with two, and the two translation rails are respectively arranged at the front and rear ends of the top of the smoke hood; the four first hangers are all connected to the bottom of the fan frame, the two second hangers on the front side are both slidably matched with the front translation rails, and the two second hangers on the rear side are both slidably matched with the rear translation rails.

[0010] In order to drive the smoke hood to move in the left and right directions and to rise and fall in the longitudinal direction relative to the fan frame, the movement mechanism includes a driving mechanism that can drive the telescopic boom assembly to rise and fall and drive the translation track to translate. A driving mechanism is provided on one of the left and right sides of the fan frame or a driving mechanism is provided on each of the left and right sides of the fan frame.

[0011] In order to realize driving the smoke hood to move in the left and right directions and to lift and lower in the longitudinal direction relative to the fan frame, the driving mechanism includes a first shaft, a gear, a first rack, a second rack, a base and a connecting rod. The first shaft is arranged in the front-to-back direction and can rotate around its own axis. A base is provided on the second suspension rod. The two ends of the first shaft are respectively arranged corresponding to the two bases. Each end of the first shaft is connected to the corresponding base through a connecting rod. One end of the connecting rod is rotatably connected to the base, and the other end of the connecting rod is rotatably connected to the end of the corresponding first shaft. The tops of the two translation tracks on the smoke hood are each provided with the first rack extending in the left and right directions. The two first suspension rods located on the right side of the bottom of the fan frame are each provided with the second rack extending in the up and down directions. The gear is arranged on the first shaft and can rotate with the first shaft. There are two gears. The two gears can be in a first position where they are meshed one-to-one with the first racks at the corresponding positions to realize the left and right movement of the smoke hood, and can be in a second position where they are meshed one-to-one with the second racks at the corresponding positions to realize the up and down lifting of the smoke hood.

[0012] In order to realize the switching back and forth of the gear between the first position and the second position, the motion mechanism also includes a switching device for realizing the switching back and forth of the gear between the first position and the second position, the switching device includes a second shaft, a tensioning belt connected between the first shaft and the second shaft, and a tensioner for controlling the tightness of the tensioning belt, the second shaft is arranged parallel to the first shaft, the second shaft is rotatably arranged between the corresponding two bases, and the tensioner is arranged on the second shaft.

[0013] Preferably, in order to achieve balance between the left and right sides of the smoke hood during movement, a driving mechanism is provided on each of the left and right sides of the fan frame, and at least one of the driving mechanisms includes a driving device for driving the first shaft to rotate.

[0014] Preferably, the driving device is a motor, the driving device is arranged on one of the connecting rods, and the output end of the driving device is transmission-connected to the first shaft.

[0015] Preferably, the telescopic boom assembly is damped telescopic, thereby maintaining the telescopic amount when not subject to external force.

[0016] Preferably, the base is a damping base, thereby maintaining a relative angle with the first shaft when no external force is applied.

[0017] Compared with the prior art, the advantages of the utility model are: by setting up a motion mechanism, the smoke collecting hood can be rotated and raised and lowered relative to the fan frame around the rotation axis extending in the front-to-back direction. The lifting and lowering can make the negative pressure zone closer to the smoke source, and the rotation around the rotation axis extending in the front-to-back direction can change the position of the negative pressure zone, thereby improving the single-sided smoking effect, so as to solve the problem of single-sided stir-frying cooking, the same side of the corresponding range hood can greatly improve the oil fume extraction effect and reduce the escape of oil fume, thereby expanding the application scenarios, so that it can achieve better oil fume extraction effect in a variety of scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the gear of the range hood according to the embodiment of the utility model being meshed with the first rack;

[0019] Figure 2 A schematic diagram of the motion mechanism of the range hood according to an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the gear of the range hood according to the embodiment of the utility model being meshed with the second rack;

[0021] Figure 4 It is a schematic diagram of the smoke collecting hood of the range hood according to the embodiment of the utility model after it moves toward the left relative to the fan frame;

[0022] Figure 5 This is a schematic diagram of the smoke collecting hood of the range hood according to the embodiment of the utility model after moving upward. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] See also Figure 4 and Figure 5 A range hood includes a fume hood 1, a fan frame 2 disposed on the fume hood 1, and a connecting pipe 4 for achieving fluid communication between the fume hood 1 and the fan frame 2. The fume hood 1 can be raised and lowered relative to the fan frame 2 and can be moved in the left and right directions. Preferably, the connecting pipe 4 is a hose, so that it can be stretched, compressed or twisted.

[0025] See also Figure 1 to Figure 5The range hood also includes a motion mechanism that drives the smoke hood 1 to rise and fall relative to the fan frame 2 and to move in the left and right directions. The motion mechanism includes a telescopic boom assembly and a translation track 33 that can translate left and right relative to the telescopic boom assembly. The translation track 33 is arranged on the smoke hood 1 and extends in the left and right directions. The telescopic boom assembly includes a first boom 31 and a second boom 32 that telescopes and cooperates with the first boom 31 in the up and down directions. One of the first boom 31 and the second boom 32 is connected to the fan frame 2, and the other of the first boom 31 and the second boom 32 slides with the translation track 33 left and right. The telescopic boom assembly is a damping telescopic boom that can maintain the telescopic amount by its own damping force when it is not subject to external force. In this embodiment, there are four telescopic boom assemblies, and the four telescopic boom assemblies are respectively arranged at the four corners of the bottom of the fan frame 2. There are two translation tracks 33, which are respectively arranged at the front and rear ends of the top of the smoke hood 1. The four first suspension rods 31 are directly or indirectly connected to the bottom of the wind rack 2. In this embodiment, the two first suspension rods 31 corresponding to the front side of the bottom of the wind rack 2 and the two first suspension rods 31 corresponding to the rear side of the bottom of the wind rack 2 are connected through the bracket 5, and the bracket 5 is connected to the bottom of the wind rack 2. The two second suspension rods 32 corresponding to the front side of the bottom of the wind rack 2 are slidably matched with the front translation rail 33, and the two second suspension rods 32 at the rear side are slidably matched with the rear translation rail 33.

[0026] The motion mechanism includes a driving mechanism capable of driving the telescopic boom assembly to rise and fall and driving the translation track 33 to translate, and the driving mechanism is arranged at least on one of the left and right sides of the wind frame 2. In this embodiment, there are two driving mechanisms, which are arranged on the left and right sides of the wind frame 2 respectively.

[0027] Each driving mechanism includes a first shaft 35, a gear 36, a first rack 37, a second rack 38, a base 39 and a connecting rod 310. The first shaft 35 is arranged in the front-to-back direction, and the first shaft 35 can rotate around its own axis. The two second suspension rods 32 located on the same side of the bottom of the wind turbine frame 2 are both provided with a base 39, and the two ends of the first shaft 35 are respectively arranged corresponding to the two bases 39, and the two ends of the first shaft 35 are connected to the corresponding bases 39 through a connecting rod 310, one end of the connecting rod 310 is rotatably connected to the base 39, and the other end of the connecting rod 310 is rotatably connected to the corresponding end of the first shaft 35. The tops of the two translation rails 33 on the smoke hood 1 are both provided with first racks 37, and the two first suspension rods 31 located on the same side of the bottom of the fan frame 2 are both provided with second racks 38 extending up and down, and the gear 36 is provided on the first shaft 35 and can rotate with the first shaft 35. There are two gears 36, and the two gears 36 can be in a first position where they are meshed one by one with the two first racks 37 to achieve the left and right movement of the smoke hood 1, and can be in a second position where they are meshed one by one with the two second racks 38 to achieve the up and down lifting of the smoke hood 1. The base 39 is a damping base, and when not affected by external forces, the base 39 can achieve the first shaft 35 to keep the flip angle unchanged.

[0028] At least one of the driving mechanisms includes a driving device 34 for driving the first shaft 35 to rotate. Preferably, in the present embodiment, one of the driving mechanisms includes a driving device 34, and the driving device 34 is a motor, which is arranged on one of the connecting rods 310. The output end of the motor is connected to the first shaft 35 and drives the first shaft 35 to rotate. The driving mechanism on this side serves as the active end, and the driving mechanism on the other side without the driving device 34 serves as the driven end.

[0029] The motion mechanism also includes a switching device for switching the gear 36 back and forth between the first position and the second position. The switching device includes a second shaft 311, a tensioning belt 312 connected between the first shaft 35 and the second shaft 311, and a tensioner 313 for controlling the tension of the tensioning belt 312. The second shaft 311 is arranged parallel to the first shaft 35, the second shaft 311 is rotatably arranged between the two corresponding bases 39, and the tensioner 313 is arranged on the second shaft 311. The tensioning belt 312 realizes the tension between the second shaft 311 and the first shaft 35 through the tensioner 313, that is, the tensioning belt 312 realizes the tightening or loosening of the second shaft 311 and the first shaft 35. See Figure 3 When the tension belt 312 is tightened, the rotation of the first shaft body 35 drives the second shaft body 311 to rotate, thereby realizing the flipping of the first shaft body 35. When the tension belt 312 is loose, the rotational force of the first shaft body 35 will not be transmitted to the second shaft body 311.

[0030] When the fume hood 1 needs to move horizontally, refer to Figure 1 and Figure 4 , the tension belt 312 is in a relaxed state, the driving device 34 drives the first shaft 35 to rotate, thereby driving the gear 36 on the first shaft 35 to rotate, and the gear 36 meshes with the first rack 37 to make the smoke hood 1 move horizontally. When the smoke hood 1 needs to move up and down, refer to Figure 3 and Figure 5 First, the tension belt 312 is in a tightened state, and the driving device 34 drives the first shaft body 35 to rotate and drives the second shaft body 311 to rotate, so that the first shaft body 35 is flipped relative to the second shaft body 311, until the first shaft body 35 is located above the second shaft body 311 and meshes with the second rack 38 on the first suspension rod 31. After the second rack 38 on the first suspension rod 31 is meshed, the tension belt 312 is loosened, and the smoke hood 1 realizes vertical movement under the action of the driving device 34. When the first shaft body 35 needs to be flipped to a horizontal state, only the reverse operation is required.

[0031] This solution can achieve the above-mentioned horizontal and vertical movements by using a set of driving mechanisms on one side (such as the right side), but in this embodiment, a set of driving mechanisms is used on each of the left and right sides. The purpose is to achieve more stable movement when the two sets of driving mechanisms move synchronously. For example, when the two sets of driving mechanisms are driven in a horizontal state or in a vertical state at the same time, the horizontal and vertical forces will be more balanced, and the driving force will be greater. There will be no problem of unilateral force causing the smoke hood 1 to twist and cause movement to become stuck. When a heavy object is placed on the smoke hood 1, the two sets of driving mechanisms can lift the heavy object. In addition, the two sets of driving mechanisms can be realized with one set in a horizontal state and the other in a vertical state, so that simultaneous horizontal and vertical movements can be achieved.

[0032] During cooking, when the left and right burners are cooking at the same time, the motion mechanism drives the smoke hood 1 to be in the middle position, and smoking can be done on both sides. When the left burner is stir-frying and the right burner is steaming, the amount of oil smoke on the left side increases significantly. At this time, the driving device 34 can be controlled to rotate by means of an oil smoke sensor or image recognition technology or key control, and the first shaft 35 rotates synchronously. Driven by the first shaft 35, the rack and pinion combination drives the smoke hood 1 to move to the left, and the negative pressure area moves to the left, thereby improving the smoking effect.

[0033] In the above, it is disclosed that the drive mechanism is driven by the same drive device 34 to achieve left and right translation and up and down lifting. Alternatively, the drive mechanism can also adopt an existing commonly used two-dimensional drive mechanism, each dimension has an independent motor drive for linear movement, and the motor of one dimension is set on the output end of another dimension.

Claims

1. A range hood, comprising a fume hood (1), a fan frame (2) arranged on the fume hood (1), and a connecting pipe (4) for fluid communication between the fume hood (1) and the fan frame (2), wherein the connecting pipe (4) is a hose and is connected between the fume hood (1) and the fan frame (2), characterized in that: The range hood further comprises a movement mechanism capable of enabling the fume hood (1) to be raised or lowered relative to the fan frame (2) and to be moved in the left and right directions.

2. The range hood according to claim 1, characterized in that: The motion mechanism comprises a telescopic boom assembly and a translation track (33) capable of being translated left and right relative to the telescopic boom assembly, the translation track (33) being arranged on the smoke hood (1) and extending in the left and right directions, the telescopic boom assembly comprising a first boom (31) and a second boom (32) slidably matched with the first boom (31) up and down, one of the first boom (31) and the second boom (32) being connected to the fan frame (2), and the other of the first boom (31) and the second boom (32) being slidably matched with the translation track (33) left and right.

3. The range hood according to claim 2, characterized in that: The telescopic boom assemblies are four, and the four telescopic boom assemblies are respectively arranged at the four corners of the bottom of the fan frame (2); the translation rails (33) are two, and the two translation rails (33) are respectively arranged at the front and rear ends of the top of the smoke hood (1); the four first booms (31) are all connected to the bottom of the fan frame (2); the two second booms (32) on the front side are both slidably matched with the front translation rails (33); and the two second booms (32) on the rear side are both slidably matched with the rear translation rails (33) left and right.

4. The range hood according to claim 3, characterized in that: The motion mechanism comprises a driving mechanism capable of driving the telescopic boom assembly to rise and fall and driving the translation track (33) to translate; one of the left and right sides of the fan rack (2) is provided with a driving mechanism, or each of the left and right sides of the fan rack (2) is provided with a driving mechanism.

5. The range hood according to claim 4, characterized in that: The driving mechanism comprises a first shaft (35), a gear (36), a first rack (37), a second rack (38), a base (39) and a connecting rod (310); the first shaft (35) is arranged along the front-rear direction and can rotate around its own axis; the second suspension rod (32) is provided with a base (39); the two ends of the first shaft (35) are respectively arranged corresponding to the two bases (39); each end of the first shaft (35) is connected to the corresponding base (39) through a connecting rod (310); one end of the connecting rod (310) is rotatably connected to the base (39); the other end of the connecting rod (310) is connected to the corresponding end of the first shaft (35); The ends are rotatably connected, the tops of the two translation rails (33) on the smoke hood (1) are each provided with the first rack (37) extending in the left-right direction, the first suspension rod (31) is each provided with the second rack (38) extending in the up-down direction, the gear (36) is provided on the first shaft (35) and can rotate with the first shaft (35), the gear (36) has two, the two gears (36) can be in a first position where they are meshed one-to-one with the first racks (37) at corresponding positions to achieve the left-right movement of the smoke hood (1), and can be in a second position where they are meshed one-to-one with the second racks (38) at corresponding positions to achieve the up-down lifting of the smoke hood (1).

6. The range hood according to claim 5, characterized in that: The motion mechanism also includes a switching device for realizing the switching of the gear (36) back and forth between the first position and the second position, the switching device includes a second shaft (311), a tensioning belt (312) connected between the first shaft (35) and the second shaft (311), and a tensioner (313) for controlling the tightness of the tensioning belt (312), the second shaft (311) is arranged parallel to the first shaft (35), the second shaft (311) is rotatably arranged between two corresponding bases (39), and the tensioner (313) is arranged on the second shaft (311).

7. The range hood according to claim 5, characterized in that: Each of the left and right sides of the fan frame (2) is provided with a driving mechanism, and at least one of the driving mechanisms includes a driving device (34) for driving the first shaft (35) to rotate.

8. The range hood according to claim 7, characterized in that: The driving device (34) is a motor. The driving device (34) is arranged on one of the connecting rods (310). The output end of the driving device (34) is drivingly connected to the first shaft (35).

9. The range hood according to claim 2, characterized in that: The telescopic boom assembly is a damping telescopic boom.

10. The range hood according to claim 5, characterized in that: The base (39) is a damping base.

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