Double-volute assembly and range hood

Abstract

The utility model discloses a double-volute assembly which comprises two volute parts which are symmetrically arranged, vortex-shaped exhaust air ducts are arranged in the volute parts, the two exhaust air ducts are arranged side by side in a back-to-back mode, and indoor air outlets and outdoor air outlets are formed in the exhaust air ducts in the advancing direction of airflow at intervals. The two outdoor air outlets and the two indoor air outlets are arranged side by side, and a switch part is movably arranged between the two exhaust air ducts and can move to a first working position or a second working position. According to the double-volute assembly of the structure, the two exhaust air ducts can be blocked at the same time only by controlling one switch piece to move so that airflow cannot reach the outdoor air outlets and is exhausted out of the indoor air outlets, and the two indoor air outlets can be closed at the same time and communicated with the exhaust air ducts only by controlling the switch piece to move so that the airflow can be exhausted out of the outdoor air outlets. And switching of the air outlet direction can be achieved only by operating one part, operation steps are few, and use is very convenient.

Description

Technical Field

[0001] The utility model relates to a double volute component and a range hood. Background Art

[0002] In the prior art, double-volute fans with dual impellers, dual motors, and a symmetrical arrangement of the motors and impellers, and only one common outlet, are increasingly being used in range hoods. Their outstanding advantages include strong suction power and the ability to independently control the left and right motors, which saves energy when cooking on one side. In related art, to cope with both low and high oil fume content usage scenarios, a single volute is provided with a first air outlet and a second air outlet. A switch mechanism is used to close one of the first and second air outlets, thereby switching the air outlets. Current practices require the installation of switch mechanisms on both the first and second air outlets, requiring the operation of each switch mechanism individually to switch the air outlets, which is very inconvenient.

[0003] In addition, when the first air outlet is located on the tangential path of the impeller, directly closing the first air outlet while keeping the second air outlet open will cause the gas to directly hit the switch mechanism at the first air outlet and then return to the second air outlet for discharge, thereby generating a large noise. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one of the purposes of the present invention is to provide a double volute assembly that can quickly switch the air outlet direction; the second purpose is to provide a range hood having the above double volute assembly.

[0005] A double volute assembly according to an embodiment of the first aspect of the present invention includes: two symmetrically arranged volute members, each volute member has a vortex-shaped exhaust duct inside, the two exhaust ducts are arranged side by side and back to back, the exhaust duct is provided with indoor air outlets and outdoor air outlets at intervals along the direction of air flow, the two outdoor air outlets and the two indoor air outlets are arranged side by side, and a switch member is movably arranged between the two exhaust ducts, the switch member can be moved to a first working position for simultaneously blocking the two exhaust ducts to allow the airflow to be discharged from the indoor air outlet, or the switch member can be moved to a second working position for simultaneously closing the two indoor air outlets and connecting the exhaust duct.

[0006] The double volute assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0007] The double volute assembly of the above structure only needs to control the movement of one switch component to block the two exhaust ducts at the same time so that the airflow cannot reach the outdoor air outlet and is discharged from the indoor air outlet. Only the movement of the switch component needs to be controlled to simultaneously close the two indoor air outlets and connect the exhaust ducts so that the airflow is discharged from the outdoor air outlet. That is, only one component needs to be operated to switch the air outlet direction. There are few operating steps and it is very convenient to use.

[0008] In some embodiments of the present invention, the outdoor air outlet is located at the free end of the exhaust duct, the indoor air outlet is arranged opposite to the outdoor air outlet, and a connecting area is provided between the two exhaust ducts to connect the two indoor air outlets. The switch component is rotatably arranged in the connecting area, and the switch component is provided with at least one first wall panel, which rotates to simultaneously isolate the two exhaust ducts or simultaneously close the two indoor air outlets.

[0009] In some embodiments of the present invention, the shape of the switch element is roughly a triangular prism, the switch element rotates around its central axis, and the three side walls of the switch element respectively constitute three first wall panels; when one of the first wall panels separates the two exhaust ducts, the remaining two first wall panels respectively guide the airflow to the corresponding indoor air outlets; when one of the first wall panels closes the two indoor air outlets, the remaining two first wall panels respectively guide the airflow to the corresponding outdoor air outlets.

[0010] In some embodiments of the present invention, the first wall panel is an arc plate that is concave toward the center of the switch element. When the switch element is in the first working position, the fan drives the airflow in the exhaust duct to be discharged toward the indoor air outlet along the inner circumferential surface of the relative arc plate.

[0011] In some embodiments of the present invention, the wall panels of the two volute members that are close to each other are provided with notches, and the notches connect the two exhaust ducts to form the connecting area. The indoor air outlet is defined between the notches and the arc plate. When the switch member is in the second working position, the arc plate and the notches coincide with each other to form a complete exhaust duct.

[0012] In some embodiments of the present invention, the switch member is rotatably arranged by a shaft passing through the volute member, one end of the shaft extending from the volute member is connected to a knob member, and an angle positioning mechanism is provided between the knob member and the volute member.

[0013] In some embodiments of the present invention, the knob member is a rotating arm connected to the rotating shaft at one end, and the angle positioning mechanism includes an elastic positioning mechanism and at least two positioning holes adapted to the elastic positioning mechanism, the two positioning holes respectively corresponding to the first working position and the second working position, and one of the elastic positioning mechanism and the positioning hole is arranged at the other end of the rotating arm, and the other is arranged on the outer wall of the volute member.

[0014] In some embodiments of the present invention, the elastic positioning mechanism includes a positioning protrusion and an elastic member, and the end of the rotating arm away from the rotating shaft is provided with a telescopic channel for the telescopic movement of the positioning protrusion, and the elastic member is located within the telescopic channel to drive the positioning protrusion to extend outward, and the two positioning holes are concavely arranged on the outer wall of the volute member.

[0015] In some embodiments of the present invention, two limit blocking parts are formed on the outer wall of the volute member, and the two limit blocking parts correspond to the first working position and the second working position of the switch member respectively. When the side wall of the rotating arm can abut against one of the limit blocking parts, the positioning protrusion is located in the corresponding positioning hole.

[0016] According to a second embodiment of the present invention, a range hood includes a double volute assembly according to any of the above technical solutions. The range hood can switch the exhaust direction by simply operating a switch member between a first working position and a second working position, which reduces the number of operation steps and is very convenient to use.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of a switch member of an embodiment of a double volute assembly of the present utility model when it is in a first working position;

[0020] Figure 2 for Figure 1 A schematic structural diagram of the switch member of the embodiment when it is in the second working position;

[0021] Figure 3 for Figure 1 A schematic structural diagram of an embodiment of the corner positioning mechanism of the embodiment;

[0022] Figure 4 for Figure 3A cross-sectional schematic diagram of the corner positioning mechanism in FIG.

[0023] Figure 5 This is a schematic diagram of the structural decomposition of an embodiment of a range hood adopting a double volute assembly of the present invention.

[0024] Reference numerals:

[0025] Volute member 100; exhaust duct 110; indoor air outlet 111; outdoor air outlet 112; limit blocking portion 120; switch member 200; first wall panel 210; rotating arm 220; fan 300; corner positioning mechanism 400; elastic positioning mechanism 410; positioning protrusion 411; elastic member 412; positioning hole 420; housing 500; partition 510; first air guide slope 520; box body 530; connecting area 600. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside", are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] See also Figure 1 and Figure 2 , a double volute assembly of an embodiment of the present invention includes: two symmetrically arranged volute members 100, the interior of the volute member 100 is provided with a vortex-shaped exhaust duct 110, the two exhaust ducts 110 are arranged side by side and back to back, the exhaust duct 110 is provided with an indoor air outlet 111 and an outdoor air outlet 112 at intervals along the direction of airflow, the two outdoor air outlets 112 and the two indoor air outlets 111 are arranged side by side, and a switch member 200 is movably provided between the two exhaust ducts 110, the switch member 200 can be moved to a first working position that simultaneously blocks the two exhaust ducts 110 to allow the airflow to be discharged from the indoor air outlet 111, or the switch member 200 can be moved to a second working position that simultaneously closes the two indoor air outlets 111 and connects the exhaust duct 110.

[0031] The double volute assembly of the above structure only needs to control the movement of one switch component 200 to block the two exhaust ducts 110 at the same time so that the airflow cannot reach the outdoor air outlet 112 and is discharged from the indoor air outlet 111. Only the movement of the switch component 200 needs to be controlled to simultaneously close the two indoor air outlets 111 and connect the exhaust duct 110 so that the airflow is discharged from the outdoor air outlet 112. That is, only one component needs to be operated to achieve the switching of the air outlet direction. There are few operating steps and it is very convenient to use.

[0032] See also Figure 1 and Figure 2In some embodiments of the present invention, the outdoor air outlet 112 is located at the free end of the exhaust duct 110, that is, at the end in the tangential direction of the fan 300, and the indoor air outlet 111 is arranged opposite to the outdoor air outlet 112. A connecting area 600 that can connect the two indoor air outlets 111 is provided between the two exhaust ducts 110, and the switch component 200 is rotatably arranged in the connecting area 600. The switch component 200 is provided with at least one first wall panel 210, and the first wall panel 210 is rotated to simultaneously block the two exhaust ducts 110 or simultaneously close the two indoor air outlets 111. It is understood that the fan 300 includes a motor and an impeller mounted on the motor's output shaft. The impeller is located within the volute 100. When the switch 200 rotates to the corresponding first wall plate 210, simultaneously blocking the two exhaust ducts 110, the two indoor air outlets 111 are in an open state. The motor drives the impeller to rotate so that the airflow in the exhaust duct 110 is blocked as it flows toward the switch 200, and the airflow is then discharged outward from the two indoor air outlets 111. When the switch 200 rotates to the corresponding first wall plate 210, simultaneously closing the two indoor air outlets 111, the two exhaust ducts 110 are in a connected state. The motor drives the impeller to rotate so that the airflow in the exhaust duct 110 is discharged along the exhaust duct 110 and out of the outdoor air outlet 112. The switch 200 is easily switched between the first and second working positions by rotation, suitable for quick operation by the user.

[0033] See also Figure 1 and Figure 2In some embodiments of the present invention, the switch member 200 is shaped roughly like a triangular prism. The switch member 200 rotates about its central axis, and the three side walls of the switch member 200 respectively constitute three first wall panels 210. When one of the first wall panels 210 blocks two of the exhaust ducts 110, the remaining two first wall panels 210 guide the airflow to the corresponding indoor air outlets 111. When one of the first wall panels 210 closes two of the indoor air outlets 111, the remaining two first wall panels 210 guide the airflow to the corresponding outdoor air outlets 112. It is understood that when one of the first wall panels 210 blocks two of the exhaust ducts 110, the remaining two first wall panels 210 extend toward their respective indoor air outlets 111. As the air flows along the exhaust duct 110 toward the outdoor air outlet 112, it contacts the first wall panels 210 and is guided to the outdoor air outlet 112, thereby reducing turbulence and noise. Moreover, since the shape of the switch component 200 is roughly a triangular prism, the three side walls of the switch component 200 respectively constitute three first wall panels 210. The user only needs to rotate the switch component 200 60° to switch from the first working position to the second working position, and the user only needs to rotate it 60° again to switch from the second working position to the first working position.

[0034] See also Figure 1 and Figure 2 In some embodiments of the present invention, the first wall panel 210 is a circular plate that is concave toward the center of the switch member 200. When the switch member 200 is in the first operating position, the fan 300 drives the airflow within the exhaust duct 110 along the inner circumferential surface of the corresponding circular plate toward the indoor air outlet 111. It will be appreciated that when airflow directly impacts the first wall panel 210, because the circular plate has a curvature that is concave toward the center of the switch member 200, the airflow can flow smoothly along the inner surface of the circular plate to the indoor air outlet 111, further reducing backflow and noise.

[0035] After comparative tests, under the same gear of the fan 300, that is, under the same power of the fan 300, when the double volute assembly of the above structure is used, the exhaust air volume is larger and the noise is lower. The following is a table of relevant tests:

[0036]

[0037] See also Figure 1 and Figure 2In some embodiments of the present invention, the wall panels of the two volute members 100 that are close to each other are each provided with a notch, and the notch connects the two exhaust ducts 110 to form the connecting area 600 (as shown in the dotted box), and the indoor air outlet 111 is defined between the notch and the arc plate. When the switch member 200 is in the second working position, the arc plate and the notch coincide with each other to form a complete exhaust duct 110. It can be understood that the arc plate coincides with the notch means that the arc plate can just completely close the notch, and the shape and extension angle of the arc plate are consistent with those of the wall panels of the original volute member 100. When the switch member 200 is in the second working position, the two volute members 100 can have a complete exhaust duct 110, so that the air flow is smoothly discharged from the outdoor air outlet 112.

[0038] See also Figure 3 and Figure 4 In some embodiments of the present invention, to facilitate manual rotation of the switch member 200 by a user, the switch member 200 is rotatably disposed via a shaft extending through the volute member 100. One end of the shaft extending from the volute member 100 is connected to a knob. To stabilize the switch member 200 in the first or second operating position, a rotation angle positioning mechanism 400 is provided between the knob member and the volute member 100. Of course, in other embodiments, in the absence of the rotation angle positioning mechanism 400, damping may be provided at the shaft to stabilize the switch member 200 after rotation to a certain angle.

[0039] See also Figure 3 and Figure 4 In some embodiments of the present invention, the knob member is a rotating arm 220 connected to the rotating shaft at one end, which can achieve the effect of saving effort during rotation. The angle positioning mechanism 400 includes an elastic positioning mechanism 410 and at least two positioning holes 420 adapted to the elastic positioning mechanism 410. The two positioning holes 420 correspond to the first working position and the second working position, respectively. One of the elastic positioning mechanism 410 and the positioning hole 420 is provided at the other end of the rotating arm 220, and the other is provided on the outer wall of the volute member 100. Specifically, when the rotating arm 220 rotates until the elastic positioning mechanism 410 enters the positioning hole 420 corresponding to the first working position, the switch member 200 is positioned and fixed in the first working position. At this time, when a certain external force is applied to rotate the switch member 200, the elastic positioning mechanism 410 can disengage from the positioning hole 420 and enter the other positioning hole 420, and the switch member 200 can be positioned and fixed in the second working position.

[0040] See also Figure 3 and Figure 4In some embodiments of the present invention, the elastic positioning mechanism 410 includes a positioning protrusion 411 and an elastic member 412. A telescopic channel is provided at one end of the rotating arm 220 away from the rotating shaft for the positioning protrusion 411 to telescopically move. The elastic member 412 is located within the telescopic channel to drive the positioning protrusion 411 to extend outward. Two positioning holes 420 are concavely disposed on the outer wall of the volute 100. Specifically, the elastic member 412 is a compression spring, the positioning protrusion 411 is a steel ball, and the positioning holes 420 are spherical concave surfaces that match the steel balls. Under the action of the compression spring, the steel balls abut against the spherical concave surfaces. When a large torsional force is applied to the rotating arm 220, the steel balls move away from the spherical concave surfaces and shorten the compression spring. When the steel balls rotate with the rotating arm 220 to align with another spherical concave surface, the compression spring restores its elastic deformation to drive the steel balls into the spherical concave surface.

[0041] See also Figure 3 In some embodiments of the present invention, in order to ensure that the rotating arm 220 rotates within a certain angle range and avoid excessive rotation, the outer wall of the volute member 100 is formed with two limit blocking portions 120, and the two limit blocking portions 120 correspond to the first working position and the second working position of the switch member 200 respectively. When the side wall of the rotating arm 220 can abut against one of the limit blocking portions 120, the positioning protrusion 411 is located within the corresponding positioning hole 420.

[0042] See also Figure 5 The present invention also discloses a range hood including a double volute assembly according to any of the above technical solutions. The range hood can switch the exhaust direction by simply operating the switch 200 between the first and second working positions, which reduces the number of steps required and makes it very convenient to use.

[0043] See also Figure 5 In some embodiments of the present invention, the range hood includes a flat main unit, which includes a housing 500. The two volutes 100 are formed within the housing 500. The two volutes 100 are symmetrically arranged. The output ends of the exhaust ducts 110 of the two volutes 100 share a partition 510. A gap is defined between the partition 510 and the two volutes 100, which helps simplify the structure of the range hood. Two fans 300 are arranged along the thickness of the main unit, with the air inlets of the fans 300 located at the bottom of the main unit. The two outdoor air outlets 112 are directed upward to the smoke duct via a first wind guide slope 520 that winds upward, thereby achieving smooth smoke exhaust without changing the thickness of the main unit. A box 530 is detachably mounted on the housing 500 and is connected to the two indoor air outlets 111. The box 530 is provided with an exhaust port and has replaceable filter material inside it to accommodate range hoods of different specifications.

[0044] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A double volute assembly, characterized in that: include: Two symmetrically arranged volute members (100), each of which has a vortex-shaped exhaust duct (110), the two exhaust ducts (110) are arranged side by side and back to back, the exhaust duct (110) is provided with an indoor air outlet (111) and an outdoor air outlet (112) at intervals along the direction of air flow, the two outdoor air outlets (112) and the two indoor air outlets (111) are arranged side by side, and a switch member (200) is movably provided between the two exhaust ducts (110), the switch member (200) can be moved to a first working position for simultaneously blocking the two exhaust ducts (110) so that the air flow is discharged from the indoor air outlet (111), or the switch member (200) can be moved to a second working position for simultaneously closing the two indoor air outlets (111) and connecting the exhaust duct (110).

2. A double volute assembly according to claim 1, characterized in that: The outdoor air outlet (112) is located at the free end of the exhaust duct (110), the indoor air outlet (111) is arranged opposite to the outdoor air outlet (112), a connecting area (600) is provided between the two exhaust ducts (110) for connecting the two indoor air outlets (111), the switch component (200) is rotatably arranged in the connecting area (600), and the switch component (200) is provided with at least one first wall plate (210), and the first wall plate (210) is rotated to simultaneously block the two exhaust ducts (110) or simultaneously close the two indoor air outlets (111).

3. A double volute assembly according to claim 2, characterized in that: The switch component (200) is roughly in the shape of a triangular prism. The switch component (200) rotates around its central axis. The three side walls of the switch component (200) respectively constitute three first wall panels (210); when one of the first wall panels (210) blocks two of the exhaust air ducts (110), the remaining two first wall panels (210) respectively guide the airflow to the corresponding indoor air outlets (111); when one of the first wall panels (210) closes the two indoor air outlets (111), the remaining two first wall panels (210) respectively guide the airflow to the corresponding outdoor air outlets (112).

4. A double volute assembly according to claim 3, characterized in that: The first wall plate (210) is an arc plate that is concavely arranged toward the center of the switch element (200). When the switch element (200) is in the first working position, the fan (300) drives the air flow in the exhaust duct (110) to be discharged toward the indoor air outlet (111) along the inner circumferential surface of the opposite arc plate.

5. A double volute assembly according to claim 4, characterized in that: Partial wall panels of the two volute members (100) that are close to each other are both provided with notches, the notches connecting the two exhaust ducts (110) to form the connecting area (600), the indoor air outlet (111) is defined between the notches and the arc plate, and when the switch member (200) is in the second working position, the arc plate and the notches coincide with each other to form a complete exhaust duct (110).

6. A double volute assembly according to claim 2, characterized in that: The switch member (200) is rotatably arranged via a rotating shaft passing through the volute member (100); one end of the rotating shaft extending from the volute member (100) is connected to a knob member; and an angle positioning mechanism (400) is provided between the knob member and the volute member (100).

7. A double volute assembly according to claim 6, characterized in that: The knob member is a rotating arm (220) connected to the rotating shaft at one end. The rotation angle positioning mechanism (400) includes an elastic positioning mechanism (410) and at least two positioning holes (420) adapted to the elastic positioning mechanism (410). The two positioning holes (420) correspond to the first working position and the second working position, respectively. One of the elastic positioning mechanism (410) and the positioning hole (420) is provided at the other end of the rotating arm (220), and the other is provided on the outer wall of the volute member (100).

8. A double volute assembly according to claim 7, characterized in that: The elastic positioning mechanism (410) includes a positioning protrusion (411) and an elastic member (412). An end of the rotating arm (220) away from the rotating shaft is provided with a telescopic channel for the positioning protrusion (411) to telescopically move. The elastic member (412) is located within the telescopic channel to drive the positioning protrusion (411) to extend outward. The two positioning holes (420) are concavely arranged on the outer wall of the volute (100).

9. The double volute assembly according to claim 8, characterized in that: Two position-limiting blocking portions (120) are formed on the outer wall of the volute member (100), and the two position-limiting blocking portions (120) respectively correspond to the first working position and the second working position of the switch member (200). When the side wall of the rotating arm (220) is able to abut against one of the position-limiting blocking portions (120), the positioning protrusion (411) is located within the corresponding positioning hole (420).

10. A range hood, characterized in that: It comprises a double volute assembly according to any one of claims 1-9.

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