Range hood and lifting device thereof

Abstract

The utility model provides an improved range hood and a lifting device thereof. The utility model provides a lifting device for a range hood. The lifting device comprises a driving unit, a first extension spring, a second extension spring and a telescopic rod, the output end of the driving unit is connected to the telescopic rod so as to drive the moving rod to do telescopic motion; the telescopic rod comprises a fixed base and a moving rod suitable for performing telescopic motion relative to the fixed base; one end of each of the first extension spring and the second extension spring is connected to the fixed base, and the other end of each of the first extension spring and the second extension spring is connected to the output end of the moving rod; the first extension spring and the second extension spring are arranged on the two sides of the moving rod in parallel and arranged to provide lifting force opposite to the gravity direction of a load hung at the output end of the moving rod. Therefore, not only is the cost saved, but also the noise is reduced.

Description

Technical Field

[0001] This application relates to the field of range hoods.

Background Art

[0002] In the Asian region, due to the traditional cooking habit of stir-frying, the oil content in the smoke generated during cooking is particularly high. Therefore, a range hood used for exhausting the cooking fumes generated during cooking has become an essential important household appliance in daily life. With the continuous improvement of people's requirements for the quality of life, range hoods are also constantly upgraded and improved. Currently, a range hood solution with a lifting function has been proposed. However, in order to achieve liftability, generally a driving motor with a relatively large power needs to be equipped, resulting in high cost and high noise.

[0003] Unless there is sufficient evidence to support it, the prior art described herein does not mean that these prior arts were known to those of ordinary skill in the field related to this application before the filing date of this application.

Summary of the Invention

[0004] An object of an embodiment of this application is to propose an improved range hood and its lifting device for at least one of the above technical problems and / or other possible technical problems not mentioned in this application.

[0005] According to a first aspect of this application, an embodiment of this application provides a lifting device for a range hood, including a driving unit, a first tension spring, a second tension spring, and a telescopic rod; the telescopic rod includes a fixed base and a moving rod adapted to perform telescopic movement relative to the fixed base; the driving unit is fixed to the fixed base; an output end of the driving unit is connected to the moving rod to drive the moving rod to perform telescopic movement; one end of each of the first tension spring and the second tension spring is connected to the fixed base, and the other end of each is connected to an output end of the moving rod; the first tension spring and the second tension spring are arranged in parallel on both sides of the moving rod and are configured to provide a lifting force opposite to the direction of gravity of the load suspended at the output end of the moving rod. In other words, the first tension spring and the second tension spring arranged in parallel on both sides of the moving rod jointly provide a lifting force opposite to the direction of gravity of the load suspended at the output end of the moving rod.

[0006] The first tension spring and the second tension spring are arranged in parallel on both sides of the moving rod and are configured to provide a lifting force opposite to the direction of gravity of the load suspended at the output end of the moving rod; thereby, it helps to reduce the load on the driving unit, making it possible to select a low-power driving unit, which not only saves costs but also helps to reduce noise.

[0007] Furthermore, the first tension spring and the second tension spring are arranged on both sides of the moving rod in parallel; thus, the lifting force is evenly applied to both sides of the moving rod, which helps to maintain the stability of the movement trajectory of the lifting device.

[0008] In one or some embodiments, when the moving rod performs telescopic movement, both the first tension spring and the second tension spring are always in a stretched state.

[0009] In one or some embodiments, the first tension spring and the second tension spring are set to be interchangeable.

[0010] In one or some embodiments, the first tension spring and the second tension spring are symmetrically arranged on both sides of the moving rod; when the moving rod performs telescopic movement, the lifting force provided by the first tension spring and the lifting force provided by the second tension spring are always the same in magnitude. Thus, it helps to maintain the stability of the movement trajectory of the lifting device.

[0011] In one or some embodiments, a first protrusion and a second protrusion are provided on the side wall of the fixed base and are arranged in opposite directions; both the first protrusion and the second protrusion are provided with hanging holes; a third protrusion and a fourth protrusion are provided on the side wall of the output end of the moving rod and are arranged in opposite directions; both the third protrusion and the fourth protrusion are provided with hanging holes; one end of the first tension spring is suspended from the hanging hole of the first protrusion; the other end of the first tension spring is suspended from the hanging hole of the third protrusion; one end of the second tension spring is suspended from the hanging hole of the second protrusion; the other end of the second tension spring is suspended from the hanging hole of the fourth protrusion.

[0012] In one or some embodiments, the drive unit includes a linear motor; or

[0013] The drive unit includes a rotary motor and a conversion mechanism.

[0014] According to the second aspect of the present application, embodiments of the present application provide a range hood, including the lifting device as described in any one of the above.

[0015] In one or some embodiments, the lifting device is configured to drive the entire range hood to perform lifting movement; or

[0016] The lifting device is configured to drive the components of the range hood to perform lifting movement.

[0017] It should be noted here that the directional expressions such as "below", "rising", "falling", "bottom end", "top" and the like in the present application are based on the normal use state of the range hood if not otherwise specified.

[0018] It should be noted here that the "first", "second", "third", and "fourth" appearing in this specification are only for descriptive purposes and do not indicate relative importance; moreover, they are not a definition of the quantity of the features they limit; in addition, they are not a definition of the logical relationship or sequential relationship of the features they limit.

[0019] The above technical solution content of this application is not used to describe all possible implementation manners of this application. Throughout the application, guidance is provided by listing examples in many places, and these examples can be used in various feasible combinations.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings only schematically illustrate and explain this application and do not limit the scope of this application, where:

[0021] Figure 1 is a schematic structural diagram of an embodiment of a range hood of this application;

[0022] Figure 2 is Figure 1 a diagram of the changing state of the shown range hood embodiment;

[0023] Figure 3 is a schematic structural diagram of an embodiment of a lifting device for a range hood of this application;

[0024] Figure 4 is Figure 3 a schematic structural diagram of the shown lifting device embodiment from another perspective;

[0025] Figure 5 is Figure 3 a diagram of the changing state of the shown lifting device embodiment.

[0026] Reference numerals:

[0027] 1 - First tension spring, 2 - Second tension spring, 3 - Driving unit, 4 - Fixed base, 5 - Moving rod, 6 - Housing, 7 - Smoke collecting hood, 8 - Air inlet, 9 - Air duct seat, 10 - Electrical box, 11 - First raised part, 12 - Second raised part, 13 - Third raised part, 14 - Fourth raised part, 15 - Oil cup.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the technical problems, technical solutions, and beneficial technical effects to be solved by this application clearer and more understandable, the following will further elaborate on this application in combination with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain this application, rather than to limit the protection scope of this application. And various embodiments may share the same view or multiple views for description, but the features appearing in the same view cannot be interpreted as the features that must be possessed by one embodiment. On the contrary, as long as they are not mutually exclusive technically, they can be combined in any suitable way. Moreover, for the sake of simplicity, different embodiments in different aspects may be presented in the same specific design, but this presentation does not mean that the embodiments of these aspects should appear together. The disassembly and / or combination of all possible embodiments and / or technical features should also consider the description in the specification and the content that can be directly and unambiguously determined by those skilled in the art based on the description in the specification.

[0029] An embodiment of a range hood is proposed in this application, including a housing 6, a smoke collecting hood 7, a blower, an oil cup 15, a power supply module, and a lifting device, as Figure 1 and 2 shown. The blower is disposed inside the housing 6. The smoke collecting hood 7 is embedded inside the housing 6. The smoke collecting hood 7 is provided with an open and ultra-forward air inlet 8. The oil cup 15 is suspended at the bottom end of the smoke collecting hood 7 and is configured to be suitable for collecting the grease filtered out by the range hood.

[0030] The lifting device is disposed inside the housing 6. The lifting device is hidden and not visible. The lifting device is configured to be suitable for driving the smoke collecting hood 7 to perform a lifting motion relative to the smoke collecting hood 7. Specifically, the lifting device is configured to be suitable for driving the smoke collecting hood 7 to switch between a first position and a second position. When the smoke collecting hood 7 is in the first position, as Figure 1 shown. When the smoke collecting hood 7 is in the second position, as Figure 2 shown. When the smoke collecting hood 7 switches from the first position to the second position, the smoke collecting hood 7 descends. When the smoke collecting hood 7 switches from the second position to the first position, the smoke collecting hood 7 ascends. When the smoke collecting hood 7 switches between the first position and the second position, the oil cup 15 moves up and down together with the smoke collecting hood 7.

[0031] When the smoke collecting hood 7 is in the first position, as Figure 1 shown, the smoke collecting hood 7 is completely hidden inside the housing 6. The housing 6 is provided with an inner cavity with an open end facing downwards. When the smoke collecting hood 7 is in the first position, the smoke collecting hood 7 is completely hidden inside the inner cavity, and the open end of the inner cavity is blocked by the oil cup 15, and the smoke collecting hood 7 is not visible. When the smoke collecting hood 7 switches from the first position to the second position, the smoke collecting hood 7 moves downward through the open end of the inner cavity and moves to the lower side of the open end of the inner cavity. The lifting device is disposed inside the inner cavity.

[0032] When the smoke collecting hood 7 is in the second position, the smoke collecting hood 7 moves to below the opening of the inner cavity, as Figure 2 shown. At this time, the air inlet 8 of the smoke collecting hood 7 is exposed outside the inner cavity, and the opening of the air inlet 8 of the smoke collecting hood 7 faces forward, generally towards the oil fume source. When the smoke collecting hood 7 is in the second position, the smoke collecting hood 7 is arranged to be suitable for gathering the oil fume airflow and guiding the oil fume airflow into the casing 6 when the range hood is operating. It should be noted that when exhausting the oil fume generated by cooking, the lifting device is started to switch the smoke collecting hood 7 to the second position. The air inlet 8 of the smoke collecting hood 7 is close to the oil fume source, which helps to improve the oil fume exhaust efficiency. After cooking is completed and there is no need to exhaust oil fume anymore, at this time, the lifting device can be started again to switch the smoke collecting hood 7 to the first position. Thus, the smoke collecting hood 7 is completely hidden inside the inner cavity, reducing space occupation.

[0033] The top of the casing 6 is provided with an air duct seat 9 and an electrical box 10, as Figure 1 and 2 shown. The air duct seat 9 is connected to the air outlet of the fan. In the application state, an exhaust pipe is connected between the air duct seat 9 and the common flue. When exhausting oil fume, the lifting device is started to switch the smoke collecting hood 7 to the second position, the fan is turned on to form a negative pressure, generating an oil fume airflow. The oil fume airflow passes through the air inlet 8 of the smoke collecting hood 7 and flows into the smoke collecting hood 7, then the oil fume airflow flows upward and into the casing 6, then the oil fume airflow flows upward and into the air duct seat 9, then the oil fume airflow flows into the exhaust pipe, and then the oil fume airflow flows out of the exhaust pipe and is discharged into the common flue.

[0034] The lifting device includes a driving unit 3, a first tension spring 1, a second tension spring 2 and a telescopic rod, as Figures 3 to 5 shown. The driving unit 3 uses an electric driving device. The power supply module is used to supply power to the driving unit 3. The power supply module controls the telescopic movement stroke of the moving rod 5 by controlling the power supply to the driving unit 3.

[0035] The telescopic rod includes a fixed base ⑷ and a moving rod 5 suitable for telescopic movement relative to the fixed base 4. The moving rod 5 adopts a two-stage nested structure and includes a first nested rod and a second nested rod. The first nested rod is arranged to be suitable for being installed in the accommodation cavity of the fixed base 4. The second nested rod is arranged to be suitable for being installed in the accommodation cavity of the first nested rod. When the smoke collecting hood 7 is in the first position, the first nested rod is installed in the accommodation cavity of the fixed base 4, and the second nested rod is installed in the accommodation cavity of the first nested rod, as Figure 3 and 4 shown. At this time, the telescopic rod is in its minimum length state. When the smoke collecting hood 7 is in the second position, the first nested rod extends out of the accommodation cavity of the fixed base 4, and the second nested rod extends out of the accommodation cavity of the first nested rod, as Figure 5 shown. At this time, the telescopic rod is in its maximum length state.

[0036] Fixed base 4, which is fixed to the body of the range hood; specifically, the fixed base 4 is fixed to the wall of the casing 6. The drive unit 3 is fixed to the fixed base 4. The output end of the drive unit 3 is connected to the moving rod 5 to drive the moving rod 5 to perform telescopic movement; thus, the moving rod 5 drives the smoke collecting hood 7 to switch between the first position and the second position. An installation hole is provided at the end of the moving rod 5, as Figure 3 shown, this installation hole is adapted for the installation part to pass through and then be further connected to the smoke collecting hood 7, so as to fix the moving rod 5 and the smoke collecting hood 7 together. As for the installation part, it can be a screw, a rivet, a bolt, a pin or other feasible components. A slide rail is provided between the smoke collecting hood 7 and the body of the range hood. When the moving rod 5 drives the smoke collecting hood 7 to switch between the first position and the second position, the smoke collecting hood 7 slides along the slide rail. Preferably, two slide rails are provided, and these two slide rails are parallel to each other. One slide rail is provided on the left side of the smoke collecting hood 7, and the other slide rail is provided on the right side of the smoke collecting hood 7.

[0037] The first tension spring 1 and the second tension spring 2 are both connected to the fixed base 4 at one end and both connected to the output end of the moving rod 5 at the other end, as Figures 3 to 5 shown. The first tension spring 1 and the second tension spring 2 are arranged on both sides of the moving rod 5 in parallel, and are set to provide a lifting force opposite to the direction of the gravity of the load suspended at the output end of the moving rod 5. In other words, the lifting forces provided by the first tension spring 1 and the second tension spring 2 are in the same direction, both vertically upward, and both opposite to the direction of the gravity of the smoke collecting hood 7.

[0038] When the moving rod 5 performs telescopic movement, the first tension spring 1 and the second tension spring 2 are always in a stretched state. Figures 3 to 5 As shown in the lifting device, the first tension spring 1 and the second tension spring 2 are both in a stretched state. Among them, Figure 3 and 4 As shown in the lifting device, it is the state of the lifting device when the smoke collecting hood 7 is in the first position. Figure 5 As shown in the lifting device, it is the state of the lifting device when the smoke collecting hood 7 is in the second position. Although, when the moving rod 5 performs telescopic movement, the first tension spring 1 and the second tension spring 2 are always in a stretched state; however, when the smoke collecting hood 7 is in the second position compared with when the smoke collecting hood 7 is in the first position, the degree of stretching of the first tension spring 1 and the second tension spring 2 increases; in other words, Figure 5 The degree of stretching of the first tension spring 1 and the second tension spring 2 in the lifting device shown is greater than Figure 3 and 4 The degree of stretching of the first tension spring 1 and the second tension spring 2 in the lifting device shown.

[0039] The first tension spring 1 and the second tension spring 2 are symmetrically arranged on both sides of the moving rod 5. When the moving rod 5 performs telescopic movement, the lifting force provided by the first tension spring 1 and the lifting force provided by the second tension spring 2 are always the same in magnitude. Thus, it helps to achieve force balance and prevent the moving rod 5 from tilting. Figure 3 and 4 In the lifting device shown, the lifting force provided by the first tension spring 1 is the same as the lifting force provided by the second tension spring 2. Figure 5 In the lifting device shown, the lifting force provided by the first tension spring 1 is the same as the lifting force provided by the second tension spring 2.

[0040] The first tension spring 1 and the second tension spring 2 are set to be interchangeable; that is, the first tension spring 1 and the second tension spring 2 are completely the same tension springs. In other words, after the installation positions of the first tension spring 1 and the second tension spring 2 are interchanged, the working performance of the lifting device remains unchanged. It should be noted that the first tension spring 1 and the second tension spring 2 are set to be interchangeable, thus facilitating assembly and manufacturing with high manufacturing efficiency.

[0041] On the side wall of the fixed base 4, there are a first convex member 11 and a second convex member 12 arranged in opposite directions. Both the first convex member 11 and the second convex member 12 are provided with hanging holes. On the side wall of the output end of the moving rod 5, there are a third convex member 13 and a fourth convex member 14 arranged in opposite directions. Both the third convex member 13 and the fourth convex member 14 are provided with hanging holes. The first convex member 11 and the third convex member 13 are arranged facing each other. The second convex member 12 and the fourth convex member 14 are arranged facing each other. The first convex member 11 and the second convex member 12 are an integral part. The third convex member 13 and the fourth convex member 14 are an integral part. The integral part of the first convex member 11, the second convex member 12, the integral part of the third convex member 13, the fourth convex member 14 and the telescopic rod part therebetween are integrally in an "I" shape, as Figures 3 to 5 shown.

[0042] One end of the first tension spring 1 is suspended in the hanging hole of the first convex member 11. The other end of the first tension spring 1 is suspended in the hanging hole of the third convex member 13. One end of the second tension spring 2 is suspended in the hanging hole of the second convex member 12. The other end of the second tension spring 2 is suspended in the hanging hole of the fourth convex member 14. One of the first tension spring 1 and the second tension spring 2 is arranged on the left side of the moving rod 5, and the other is arranged on the right side of the moving rod 5. The first tension spring 1, the second tension spring 2 and the moving rod 5 all extend in the vertical direction, are parallel to each other, and there is a certain gap between adjacent ones, as Figures 3 to 5 shown.

[0043] The drive unit 3 can either adopt a linear motor or a linear motion drive device composed of a rotary motor and a conversion mechanism.Figures 3 to 5 In the illustrated embodiment, a linear motion driving device composed of a rotary motor and a conversion mechanism is adopted, and the corresponding conversion mechanism is a worm and worm gear transmission mechanism. In addition, it should be noted that the conversion mechanism is not limited to the worm and worm gear transmission mechanism, and a rack and pinion transmission mechanism or other conversion mechanisms that can convert the rotary motion of the rotary motor into a linear motion can also be adopted.

[0044] Exemplarily, it can also be a lifting device configured to drive other components of the range hood to perform lifting motion. For example, the "other components" can be components such as a liftable smoke guide plate or a liftable filter net. It should be noted that the "other components" can also be other components that need to perform lifting motion. This embodiment focuses on the differences from the above embodiments, and the same or similar parts of this embodiment can be referred to the above embodiments.

[0045] Exemplarily, it can also be a lifting device configured to drive the entire range hood to perform lifting motion. During cooking, the lifting device drives the entire range hood to descend, the negative pressure area of the range hood moves downward, the oil smoke suction port of the range hood approaches the oil smoke source, and the oil smoke exhaust efficiency is high. When cooking is over, the lifting device drives the entire range hood to rise, and finally the range hood is aligned with the cabinet or hidden in the cabinet, occupying less space and improving the user experience. This embodiment focuses on the differences from the above embodiments, and the same or similar parts of this embodiment can be referred to the above embodiments.

[0046] Exemplarily, the motion rod can also adopt a first-level nested structure, a third-level nested structure or a more-level nested structure. This embodiment focuses on the differences from the above embodiments, and the same or similar parts of this embodiment can be referred to the above embodiments.

[0047] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure of the present application, even when describing a single embodiment relative to a specific feature. The feature examples provided in the disclosure of the present application are intended for illustration rather than limitation, unless otherwise expressly stated. In specific implementations, multiple features can be combined with each other according to actual needs and when technically feasible. Various substitutions, changes and modifications can also be conceived without departing from the spirit and scope of the present application.

Claims

1. A lifting device for a range hood, characterized in that: It includes a driving unit (3), a first tension spring (1), a second tension spring (2) and a telescopic rod; The telescopic rod includes a fixed base (4) and a moving rod (5) adapted to perform telescopic movement relative to the fixed base (4); The driving unit (3) is fixed to the fixed base (4); The output end of the driving unit (3) is connected to the moving rod (5) to drive the moving rod (5) to perform telescopic movement; One end of each of the first tension spring (1) and the second tension spring (2) is connected to the fixed base (4), and the other end of each is connected to the output end of the moving rod (5); The first tension spring (1) and the second tension spring (2) are arranged parallel to each other on both sides of the moving rod (5), and are arranged to provide a lifting force opposite to the direction of gravity of the load suspended at the output end of the moving rod (5).

2. The lifting device according to claim 1, characterized in that: When the moving rod (5) performs telescopic movement, the first tension spring (1) and the second tension spring (2) are always in a stretched state.

3. The lifting device according to claim 1, characterized in that: The first tension spring (1) and the second tension spring (2) are arranged to be interchangeable.

4. The lifting device according to claim 1, characterized in that: The first tension spring (1) and the second tension spring (2) are symmetrically arranged on both sides of the moving rod (5); When the moving rod (5) performs telescopic movement, the lifting force provided by the first tension spring (1) and the lifting force provided by the second tension spring (2) are always the same in magnitude.

5. The lifting device according to claim 1, characterized in that: On the side wall of the fixed base (4), a first protrusion (11) and a second protrusion (12) are arranged in opposite directions; Both the first protrusion (11) and the second protrusion (12) are provided with hanging holes; On the side wall of the output end of the moving rod (5), a third protrusion (13) and a fourth protrusion (14) are arranged in opposite directions; Both the third protrusion (13) and the fourth protrusion (14) are provided with hanging holes; One end of the first tension spring (1) is suspended in the hanging hole of the first protrusion (11); the other end of the first tension spring (1) is suspended in the hanging hole of the third protrusion (13); one end of the second tension spring (2) is suspended in the hanging hole of the second protrusion (12); the other end of the second tension spring (2) is suspended in the hanging hole of the fourth protrusion (14).

6. The lifting device according to claim 1, characterized in that: The driving unit (3) includes a linear motor; or The driving unit (3) includes a rotary motor and a conversion mechanism.

7. A range hood, characterized in that: It includes the lifting device according to any one of claims 1 to 6.

8. The range hood according to claim 7, characterized in that: The lifting device is configured to be suitable for driving the whole range hood to perform a lifting movement; or The lifting device is configured to be suitable for driving the components of the range hood to perform a lifting movement.

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