WO2018014413A1

WO2018014413A1 - Flow path structure, and range hood and volute thereof

Info

Publication number: WO2018014413A1
Application number: PCT/CN2016/096152
Authority: WO
Inventors: 钟平; 邹义华; 蒋济武
Original assignee: 广东美的厨房电器制造有限公司; 美的集团股份有限公司
Priority date: 2016-07-22
Filing date: 2016-08-22
Publication date: 2018-01-25
Also published as: CN106122097A; CN106122097B

Abstract

Disclosed are a flow path structure, and a range hood and a volute thereof. The flow path structure comprises: a first fluid source (11), with the first fluid source (11) comprising a first flow channel having a first opening (12); a second fluid source (13), with the second fluid source (13) comprising a second flow channel having a second opening (14); a first exhaust outlet (15) and a second exhaust outlet (16); and further comprises: a single transfer component (100), with the single transfer component (100) being rotatably arranged among the first opening (12), the second opening (14), the first exhaust outlet (15) and the second exhaust outlet (16), and being capable of reciprocally rotating between a first position (A) and a second position (B), wherein at the first position (A), the single transfer component (100) blocks the second exhaust outlet (16), and the first opening (12) and the second opening (14) are both in communication with the first exhaust outlet (15); and at the second position, the single transfer component (100) blocks the first exhaust outlet (15), and the first opening (12) and the second opening (14) are both in communication with the second exhaust outlet (16). Disclosed are a volute comprising the flow path structure and a range hood comprising the volute. The flow path structure can synchronously achieve a transfer between a mode of discharging therefrom and a mode of circulating therein.

Description

Flow path structure and range hood and volute thereof

Technical field

The present invention relates to the field of flow path design for fluids, and in particular to a flow path structure and a fan assembly including the flow path structure and a range hood including the same.

Background technique

The flow path structure design is involved in various technical fields, such as the flow path design of hydraulic oil in the hydraulic field, the aerodynamic gas flow path design in the aviation field, and the gas flow in the range hood in the kitchen appliance field. Road design. In these fields, the design of the flow path structure has an important or even critical effect on the functional realization of the device to which it belongs.

For example, it is well known that range hoods (i.e., range hoods) are important electrical equipment for the kitchen environment. Usually, the range hood is installed above the stove of the kitchen to quickly remove the waste from the stove and the harmful gases (which may contain soot) generated during cooking, and discharge it outside, thereby reducing the pollution of the indoor environment. In some existing types of range hoods, in addition to the working mode of external exhaust (referred to as efflux), there is an internal circulation mode of operation, as shown in FIG. In the internal circulation mode of operation, the gas sucked by the range hood can be filtered and/or purified and discharged back into the room. Moreover, depending on the usage, it is possible to switch between the efflux mode and the inner loop mode.

At the same time, in the current range hood, in order to obtain sufficient suction force, two fans for suction are provided. Therefore, when implementing the above mode conversion, it is necessary to simultaneously consider how the air ducts of the two fans realize the mode switching problem. To this end, in the prior art, various technical solutions have been devised for a dual mode range hood having an efflux mode and an inner circulation mode.

The Chinese Patent Publication No. CN102261690A discloses an ejector and an inner circulation type thin range hood, as shown in Figs. 2 and 3. In the two air ducts 5 connected by the two suction fans, respectively, a rotatable wind deflector 7 is provided, wherein: in the state shown in FIG. 2, the wind deflector 7 separates the air duct 5, Therefore, the air duct 5 is respectively connected to the outer air outlet 6 and not communicated with the inner circulation air outlet to realize the outer row mode; in the state shown in FIG. 3, the rotated wind deflectors 7 are connected to each other. Thereby, the outer exhaust vent 6 is closed, and the air passage is respectively connected to the inner circulation tuyere to realize the inner circulation mode.

Obviously, in the solution of CN102261690A, the two air ducts 5 are respectively arranged by the respective windshield 7 Conversion of mode and inner loop mode. This leads to the problem that the two windshields cannot work synchronously. Specifically, it is likely that one windshield is in the outer row mode and the other windshield is in the inner circulation mode, thereby causing the range hood not to be in a normal and reliable working state. Or even if the two windshields can work together, since the two air passages are controlled by the respective windshields to control the mode conversion, the flow areas of the two air ducts are likely to be different, resulting in two winds. The unevenness of the road.

A volute for a range hood is disclosed in Chinese Patent Publication No. CN105091058A, as shown in Figures 4-6. The volute includes a fixed shell portion 240 and a moving shell portion 250 that is movable relative to the fixed shell portion between a closed position and an open position, wherein FIG. 4 is a closed position, and FIG. 5 is open position. In the closed position state, the wind in the air duct is discharged from the volute air outlet 230 to the outside; in the open position state, the circulating air outlet 260 is defined between the moving shell portion and the fixed shell portion, and the wind in the air passage passes through the The circulating air outlet 260 is discharged to the room.

In the technical solution of CN105091058A, as shown in FIG. 6, the moving shell portion 250 is respectively divided into two moving shell portions of different air passages, and the moving shell portion 250 is respectively rotated and moved by the pivot shaft 251, thereby realizing mode conversion. . Obviously, there are also (potential) technical problems similar to CN102261690A in this scheme.

In view of this, how to reliably ensure synchronization is a technical problem that needs to be solved in the case of a simultaneous switching mode with different fluid channels.

Summary of the invention

It is an object of the present invention to provide a solution that enables synchronicity of individual fluid passages when different fluid passages require simultaneous switching of operating modes, i.e., each fluid passage can reliably and synchronously effect mode switching.

According to the application, a flow path structure is provided, the flow path structure comprising:

a first fluid source, the first fluid source comprising a first flow channel having a first opening;

a second fluid source, the second fluid source including a second flow channel having a second opening;

a first discharge port and a second discharge port, the first discharge port and the second discharge port being disposed adjacent to the first opening and the second opening;

Wherein the flow path structure further comprises a single conversion member rotatably disposed between the first opening, the second opening, the first discharge port and the second discharge port, and capable of being in the first position A and the second position B reciprocally rotate,

In the first position A, the single conversion member blocks the second discharge port and the first opening and the second opening are both in communication with the first discharge port;

In the second position B, the single switching member blocks the first discharge port and the first opening and the second opening are both in communication with the second discharge port.

Preferably, the first opening has a first edge and a second edge opposite to each other, the second opening has opposite third and fourth edges, wherein the first edge and the third edge define a formation therebetween The first discharge port defines a second discharge port between the second edge and the fourth edge, and the first opening, the second opening, the first discharge port and the second discharge port are arranged perpendicular to On the same plane of the rotation axis of the single conversion member, the first edge, the second edge, the third edge, and the fourth edge are located on a concentric circle in a direction along a rotation axis of the single conversion member, the concentric The center of the circle is located on the axis of rotation of the single conversion member.

Preferably, the single conversion member includes a first guiding piece and a second guiding piece, in the first position A, an edge of the first guiding piece abuts the second edge, an edge of the second guiding piece Resisting the fourth edge, thereby blocking the second discharge port; in the second position B, an edge of the first guiding piece abuts the third edge, and an edge of the second guiding piece is in contact with The first edge is described to thereby block the first discharge port.

Preferably, the single conversion member further includes a third guide piece, and the first guide piece, the second guide piece, and the third guide piece form a three-pointed star shape.

Preferably, the third guiding piece does not interfere with the first edge, the second edge, the third edge and the fourth edge during the rotation of the single conversion member.

Preferably, the first guiding piece and the third guiding piece are connected by a concave first guiding surface; the second guiding piece and the third guiding piece are connected by a concave second guiding The surface is connected; and/or the first guiding piece and the second guiding piece are connected by a concave third guiding surface.

Preferably, the single conversion member is formed as a hollow structure.

Preferably, the single conversion member is formed with a centrally symmetrical cross-sectional shape.

Preferably, the edge of the first guiding piece and/or the edge of the second guiding piece are provided with a seal or an elastic member.

According to another aspect of the present application, there is also provided a volute of a range hood, the volute comprising:

a first air passage for communicating with the first air duct;

a second air duct for communicating with the second air duct;

An external exhaust vent formed at a rear portion of the volute;

a circulation exhaust vent formed at a front portion of the volute;

The volute further includes the above-mentioned flow path structure provided by the present application, the first air passage is the first flow passage, the second air passage is the second flow passage, and the circulating air is exhausted The port is the first discharge port, and the external exhaust port is the second discharge port.

Preferably, the rotation axis of the single conversion member extends through the volute and is formed with an operation portion.

Preferably, the volute is provided with a driving device for driving the rotation of the rotating shaft of the single conversion member.

Preferably, the volute is further provided with a mode selection device and a controller, the mode selection device is electrically connected to the controller, the controller is electrically connected to the driving device, and the mode selection device is used for selecting The information of the operational mode is sent to the controller, and the controller controls the driving device to drive the rotation of the rotating shaft according to the acquired information, so that the single conversion component is in the selected operational mode.

According to still another aspect of the present application, there is also provided a range hood comprising a hood casing, a first fan, a second fan, and a volute provided herein.

In the technical solution of the present application, the control of the fluid flow direction is realized by a single conversion member, and the respective control members are not separately provided for the two fluid sources. Therefore, by controlling the rotation of a single switching member, it is possible to simultaneously realize the conversion of different modes in complete synchronization.

Other features and advantages of the invention will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing:

Figure 1 is a schematic view showing an efflux mode and an inner circulation mode of the range hood;

2 to 3 are schematic views of a volute structure for a range hood in the prior art;

4 to 6 are schematic views of another volute structure for a range hood in the prior art;

Figure 7 is a schematic view of a flow path structure according to the present application, wherein a single conversion member is in a first position A;

Figure 8 is a schematic view of a flow path structure according to the present application, wherein a single conversion member is in a second position B;

A-c in Fig. 9 are schematic views of three different structural forms of a single conversion component, respectively;

Figure 10 is a perspective view of a single conversion member of a in Figure 9;

Figure 11 is a schematic view of a volute structure according to a preferred embodiment of the present application, wherein a single conversion member is located in a first position A;

Figure 12 is a schematic view showing the direction of the air flow in Figure 11;

Figure 13 is a perspective view of the volute structure of Figure 11;

14 is a schematic view of a volute structure in accordance with a preferred embodiment of the present application, wherein a single conversion component is in a second position as a schematic view of a volute structure in accordance with a preferred embodiment of the present application, wherein a single conversion component is in the first position Set B;

Figure 15 is a schematic view showing the direction of the air flow in Figure 14;

Figure 16 is a perspective view of the volute structure of Figure 14;

Figure 17 is an exploded perspective view showing a fan assembly for a range hood according to a preferred embodiment of the present application;

Figure 18 is a schematic view of the operating portion of Figure 17;

19 is a partial perspective view of a range hood in accordance with a preferred embodiment of the present application.

detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

As shown in Figures 7 and 8, the flow path structure according to the present invention comprises: a first fluid source 11 comprising a first flow path having a first opening 12; a second fluid source 13, the second The fluid source 13 includes a second flow passage having a second opening 14; and a first discharge port 15 and a second discharge port 16, the first discharge port 15 and the second discharge port 16 and the first opening 12 and the second opening 14 Proximity settings.

In the present application, the main function of the flow path structure is to achieve fluid flow control, especially flow direction control. The technical solution is suitable for gas or liquid, but is particularly suitable for the control of gas flow, and more particularly for the field of range hoods which will be described later.

The first fluid source 11 supplies fluid through a first flow channel and the second fluid source 13 supplies fluid through a second flow channel, both of which may supply a gas or liquid. The first opening 12 of the first flow passage generally has a rectangular cross-sectional shape, and the second opening 14 of the second flow passage has a similar structural design as the first opening 12. However, the present application is not limited thereto, and the first opening and the second opening may have other cross-sectional shapes such as a circular shape or an elliptical shape on the premise of achieving the object of the present application. The first discharge port 15 and the second discharge port 16 are for selectively discharging fluid from the first fluid source and the second fluid source, the first discharge port 15 and the second discharge port 16 and the first opening 12 and The second openings 14 are disposed adjacent to each other such that a space for controlling the direction of fluid flow is formed between the respective discharge ports and the openings.

Specifically, in the present application, as shown in FIGS. 7 and 8, a

single

conversion member 100 is disposed in the space, and the single conversion member 100 is rotatably disposed at the first opening 12 and the second opening 14, Between the first discharge port 15 and the second discharge port 16, and reciprocally rotatable between the first position A and the second position B to control the flow of fluid from the first opening and the second opening to the first discharge port, Still flow to the second row of exits. The single conversion member 100 can be rotatably mounted by a rotating shaft 24 (shown in Figure 9). Wherein: in the first position A as shown in FIG. 7, the single conversion member 100 blocks the second discharge port 16 and the first opening 12 and the second opening 14 are both in communication with the first discharge port 15, thereby allowing from the first The fluid of the opening and the second opening flows to the first discharge port without flowing to the second discharge port; in the second position B illustrated in FIG. 8, the single conversion member 100 blocks the first discharge port 15 and the first opening 12 and the first Both openings 14 are in communication with the second discharge port 16.

Although in the illustrated embodiment of the present application, the first opening, the second opening, the first discharge port, and the second discharge port are disposed in the same plane perpendicular to the rotation axis of the single conversion member, the application is not limited thereto. The respective openings and discharge openings can also be spatially arranged in a three-dimensional manner, correspondingly using a single closure member such as a ball, which is achieved by designing different passages in the spherical closure member.

In the technical solution of the present application, the control of the fluid flow direction is achieved by a single conversion member. This has significant differences and advantages over the prior art mentioned in the background. First of all, in the present application, the conversion of the flow direction is realized by a single conversion member, without separately providing the respective control members for the two fluid sources. Therefore, by controlling the rotation of a single switching member, it is possible to simultaneously realize the conversion of different modes in complete synchronization. Furthermore, when in the first position or the second position, it is possible to ensure that the flow rates of the fluid from the first fluid source and the second fluid source are kept consistent to obtain a better uniformity of fluid flow. Thus, with the technical solution of the present application, the fluid flow direction control can be achieved completely synchronously for different fluid sources, and the transport flow rate of different fluid sources can be maintained to maintain good uniformity.

As shown in FIGS. 7 and 8, preferably, the first opening 12 has a first edge 121 and a second edge 122 opposite to each other, and the second opening 14 has an opposite third edge 141 and a fourth edge 142, wherein At a position adjacent to the first opening 12 and the second opening 14, the first edge 121 and the third edge 141 define a first discharge port 15 that forms a communication with the first discharge passage (not labeled), the second edge 122 and A fourth discharge port 16 is formed between the fourth edge 142 that is in communication with the second discharge passage (not labeled). The first discharge port 15 and the second discharge port 16 may have similar structural designs as the first opening 12 and the second opening 14. A space formed between the first opening, the second opening, the first discharge port, and the second discharge port may be provided with a switching mechanism to achieve control of the fluid flow direction. An edge can be understood as a wall having a smaller thickness (as shown in Figures 7 and 8) such that the distance between the first opening 12 and the second discharge opening 16 is closer; or the edge can also be understood as a thicker wall. Thus, there is a certain distance between the first opening 12 and the second discharge opening 16.

Referring to the preferred embodiment of Figures 7 and 8, the first opening 12, the second opening 14, the first discharge opening 15 and the second discharge opening 16 are arranged on the same plane perpendicular to the axis of rotation of the single conversion member, along said The first edge 121, the second edge 122, the third edge 141, and the fourth edge 142 are located on a concentric circle in the direction of the rotation axis of the single conversion member (i.e., as viewed in a direction from which the plane is viewed) (Fig. 12 and The dotted line shown in Fig. 15 is located at the center of the circle of the concentric circle on the axis of rotation of the single conversion member.

In this preferred embodiment, the individual flow paths are substantially planarly distributed. In order to accommodate the rotation of the single conversion member, the first edge to the fourth edge are located on a concentric circle centered on the center of rotation of the single rotating member, thereby forming the single conversion member and each edge as the single conversion member rotates Different coordination relationships to achieve fluid flow control. In this embodiment, preferably, the positions at which the first edge to the fourth edge are located may be connected in a virtual line to become a rectangle, that is, as shown in FIGS. 7 and 8, the first opening 12 and the second opening 14 The first discharge port 15 and the second discharge port 16 are disposed opposite to each other. As described above, the present application is not limited thereto, and a spatial stereoscopic arrangement may be designed. Further, in the preferred embodiment, the respective edges are designed as walls extending in the direction of the rotation axis of the single conversion member. Similarly, by the operation of a single conversion component, it is possible to achieve simultaneous conversion of different modes in full synchronization.

It can be seen from the above analysis that in the technical solution of the present application, a single conversion component is a key component. Depending on the structural design, a single conversion component can have a corresponding design. For example, as described above, a single conversion member can be designed in the form of a spherical structure having a plurality of hollow passages. For a planar distributed flow path design, a single conversion component can be designed in the form of a "windmill", ie a structure in which blades (guide sheets) are placed on the rotating shaft.

For example, the single conversion member 100 may be designed as a structure of two plate-like guide sheets extending in the radial direction supported by the rotary shaft 24, as shown in b of FIG. Specifically, the single conversion member 100 includes a first guiding piece 17 and a second guiding piece 18, and in the first position A, the edge of the first guiding piece 17 abuts against the second edge 122, and the edge of the second guiding piece 18 opposes the fourth The edge 142, thereby blocking the second discharge port 16; in the second position B, the edge of the first guiding piece 17 abuts the third edge 141, and the edge of the second guiding piece 18 abuts the first edge 121, thereby blocking the first row Exit 15, as shown in Figures 7 and 8. It is to be noted that in the embodiments shown in FIGS. 7 and 8 and a and FIG. 10 of FIG. 9, the single conversion member 100 further includes a third guide piece 19, a first guide piece 17, a second guide piece 18, and The third guide piece 19 is formed in a three-pointed star shape as shown in Fig. 9 (a and c) and Fig. 10.

That is to say, the structural form having the third guide piece 19 is a preferred solution. When only the plate-shaped first guide piece and the second guide piece are used, it can also be used in the technical solution of the present application. It can be understood that for the design form of the two plate-shaped guide sheets, the structure is relatively simple and the cost is relatively low. The first conversion member 100 is connected by the first guiding piece 17 and the second guiding piece 18, and in the first position A, the second discharge port 16 can be blocked, while the first opening and the second opening are both connected to the first The discharge port 15; in the second position B, the first guide piece 17 and the second guide piece 18 can block the first discharge port 15 while keeping the first opening and the second opening both communicating with the second discharge port 16.

In a preferred embodiment, each edge is a wall extending in the direction of the axis of rotation of the single conversion member, so that when the edge of the corresponding guide piece and the edge of each opening interfere with each other, a line seal between the two is actually formed, thereby Achieve the blocking effect. Preferably, in order to obtain a better seal, a seal can be provided at each edge Or elastic parts (not shown). Further preferably, a seal or an elastic member is provided at the edge of the first guide piece 17 and/or the edge of the second guide piece 18 in consideration of ease of assembly. The seal may be a plurality of soft tops or gaskets, etc., and the elastic members may be strips made of an elastic material such as rubber.

In a preferred embodiment in which the third guide piece 19 is provided, due to the presence of the third guide piece 19, for the flowing fluid, it is possible to some extent from the first opening 12 and the second opening 14 which are opposite to each other, respectively. The fluid is isolated to prevent the mutual abutment of the two, which in turn facilitates the flow of the fluid. In addition, for the single conversion member 100, the fluids from the first opening 12 and the second opening 14 are simultaneously applied to both sides of the third guiding piece 19 in both directions by the arrangement of the third guiding piece 19. Thus, the stability of the single conversion member 100 is achieved by the pressure of the fluid to facilitate maintaining the single conversion member 100 in the first position A or the second position B in the active state.

The third guiding piece 19 may have the same or similar shape as the first guiding piece 17 and the second guiding piece 18, and may have a plate-like structure as shown in c of FIG. In addition, in order to satisfy the operation state in which the rotation of the single conversion member requires rotation, it is preferable that the third guide piece 19 does not overlap with the first edge 121, the second edge 122, the third edge 141, and the fourth during the rotation of the single conversion member. Edge 142 interferes. Here, the occurrence of interference means that the third guide piece 19 collides with the corresponding edge and thus cannot allow the single conversion member to be easily rotated. Since the third guiding piece 19 functions mainly to guide the flow of the fluid, and is not mainly used for the purpose of closing, the radial direction of the third guiding piece 19 (i.e., the length extending from the rotating shaft 24 in the radial direction thereof) It is generally not larger than the radial dimension of the first guide piece 17 and the second guide piece 18.

In order to further guide the flow of the fluid, preferably, as shown in a and FIG. 10 of FIG. 9, the first guiding piece 17 and the third guiding piece 19 are connected by the concave first guiding surface 21; the second guiding piece 18 is connected to the third guiding piece 19 by a concave second guiding surface 22; and/or the first guiding piece 17 and the second guiding piece 18 are connected by a concave third guiding surface 23. In other words, a concave guide surface may be provided between any two adjacent guide sheets of the above three guide sheets.

The case of being in the first position A shown in FIG. 7 will be described as an example. A concave first guiding surface 21 is provided between the first guiding piece 17 and the third guiding piece 19, and the so-called concave means that it is recessed from the outside to the inside in the radial direction of the rotating shaft 24 of the single conversion member 100 (as shown in the figure). 9 shows), with the first guiding surface 21, the fluid from the first opening 12 can smoothly enter the first discharge opening 15 under the guidance of the first guiding surface 21. Similarly, a second concave guiding surface 22 may be provided between the second guiding piece 18 and the third guiding piece 19, and in the solution shown in FIG. 7, the fluid from the second opening 14 is in the first The second guide surface 22 smoothly flows into the first discharge port 15 under the guidance of the guide surface 22. More preferably, the first guiding surface 21 and the second guiding surface 22 described above are simultaneously designed. With the situation in the first position A Similarly, when the single conversion member 100 is in the second position B, the first guiding surface 21 and/or the second guiding surface 22 also function to guide the fluid to smoothly enter the second discharge port 16.

Preferably, the third guiding surface 23 is formed between the first guiding piece 17 and the second guiding piece 18, whether in the case of the first position A or the second position B, the third guiding surface 23 is not Direct contact with the fluid. The main function of the third guiding surface 23 is to connect the first guiding piece 17 and the second guiding piece 18, thereby functioning to strengthen the structural strength of the single conversion member. At the same time, the third guiding surface 23 is a concave structure, thereby forming a relatively symmetrical overall shape on the basis of the shape of the trigeminal star to obtain good manufacturability of the single conversion member. More preferably, as shown in FIG. 10, a single conversion member is formed with a centrally symmetrical cross-sectional shape.

The single conversion member may have an overall solid structure, but preferably, it may be designed to have a hollow structure, as shown in FIG. 10, to reduce the overall weight and reduce the manufacturing cost. Still preferably, as shown in Fig. 10, in the case of a hollow structure, a connecting rib (not labeled) is provided between the rotating shaft 24 and the wall, by which the overall structural strength of the single conversion member can be enhanced. In the axial direction along the rotating shaft 24, the single conversion member 100 has a predetermined height, and usually the single conversion member 100 has the same cross-sectional shape.

The flow path structure based on the technical solution of the present application has been described in detail above. The volute 300 for the range hood designed by the flow path structure is described in detail below. As shown in FIGS. 11 to 16, the volute 300 includes a first air passage 301 for use with the first air passage 301. a fan 306 is connected to the second air duct 302, the second air duct 302 is for communicating with the second fan 307; the external air outlet 303 is formed at the rear of the volute; a tuyere 304, the circulating vent 304 is formed at a front portion of the volute; wherein the volute further includes the above-mentioned flow path structure provided by the present application, and the first air passage 301 is the first flow The second air passage 302 is the second flow passage, the circulating air outlet 304 is the first discharge port 15, and the external air outlet 303 is the second discharge port 16. Here, the rear portion refers to the direction in which the range hood is facing the user in the use state, and the front portion is in the direction toward the user.

7 and 8, the arrangement of Figures 11 and 12 adds two fans. The fan is used to provide a suction wind, so that the oil smoke generated during cooking is sucked in through an air inlet (not shown) located at the bottom of the range hood, and then passes through the first air duct and the second air passage, and then passes through the outside. Exhaust vents or circulating exhaust vents. The selection and setting of the fan, as well as the basic structure and working principle of the range hood can refer to the traditional range hood.

In the above, the flow path structure provided by the present application and its working principle have been described in detail. In the technical solution applied to the range hood, when the single conversion member 100 is in the first position A, the first air passage 301 and the second air passage 302 are not in communication with the external air outlet 303, and both are arranged with the circulating air outlet. 304 is communicated to deliver the pumped wind to the circulating vent 304 so that the range hood is in the inner circulation mode, as shown in Figures 11, 12 and 13.

When the single conversion member 100 is in the second position B, the first air passage 301 and the second air passage 302 are not in communication with the circulating air outlet 304, and both communicate with the external air outlet 303, thereby conveying the pumped wind power to The external vent 303 allows the range hood to be in the efflux mode as shown in Figures 14, 15 and 16. The conversion of the above two modes can be achieved by the rotation of the rotary shaft 24 of the single conversion member 100.

In order to facilitate the operation of the single conversion member 100, as shown in FIGS. 17 and 18, the rotation shaft 24 of the single conversion member 100 extends through the volute and is formed with the operation portion 25. In the state of use, the operating portion 25 generally protrudes from the bottom of the range hood to facilitate use by a user. The operating portion 25 is fixedly coupled to the rotating shaft 24, so that when the operating portion 25 is rotated, the rotating shaft 24 can be driven to rotate, thereby driving the single switching member to rotate integrally, so that the two air passages simultaneously realize different modes of switching.

The operation portion 25 may have various forms, for example, the operation portion 25 may be a knob or a knob (as shown in FIGS. 17 and 18). The operation portion may be integrally formed with the rotating shaft 24, or may be fixedly attached to the rotating shaft 24 as a separate member. The material of the operation portion 25 may be made of a metal material or a non-metal material such as plastic. The specific design of the operation unit 25 can be selected and applied depending on the specific operating conditions.

Preferably, the volute is provided with a drive for driving the rotation of the rotary shaft 24 of the single conversion member. By the activation and deactivation of the drive device, the drive rotation of the single conversion member can be automatically achieved. The drive can be a suitable motor.

Further preferably, the volute may further be provided with a mode selection device and a controller, the mode selection device being electrically connected to the controller, the controller being electrically connected to the drive device, the mode selection device for selecting the selected work The mode information is sent to the controller, and the controller controls the driving rotation of the rotating shaft 24 by the driving device according to the acquired information, so that the range hood is in the selected working mode (outside mode or inside) Loop mode). The mode selection means may be disposed on the surface of the volute facing the user to facilitate selection operation.

In addition, the present application also provides a range hood including a hood casing 305, a first fan 306, a second fan 307, and the above-described volute provided by the present application, as shown in FIG.

According to the volute and the range hood provided by the present application, since the flow path structure provided by the present application is provided in the air passage of the volute, the two air passages can be completely synchronized to realize different modes of conversion, and are completed. After the conversion, the airflow conditions in the two air ducts are basically the same and have good uniformity.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the embodiments described above, and various modifications may be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

In addition, it should be noted that the specific technical features described in the above specific embodiments are not spears. In the case of a shield, it may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims

Flow path structure, the flow path structure includes:

a first fluid source (11), the first fluid source (11) comprising a first flow channel having a first opening (12);

a second fluid source (13), the second fluid source (13) comprising a second flow channel having a second opening (14);

a first discharge port (15) and a second discharge port (16), the first discharge port (15) and the second discharge port (16) being disposed adjacent to the first opening (12) and the second opening (14) ;

The flow path structure further includes a single conversion member (100) rotatably disposed at the first opening (12), the second opening (14), and the first discharge port Between (100) and the second discharge port (16), and capable of reciprocatingly rotating between the first position (A) and the second position (B),

In the first position (A), the single conversion member (100) blocks the second discharge port (16) and the first opening (12) and the second opening (14) are both a row of outlets (15) connected;

In the second position (B), the single conversion member (100) blocks the first discharge port (15) and the first opening (12) and the second opening (14) are both The second row of outlets (16) is connected.
The flow path structure according to claim 1, wherein the first opening (12) has a first edge (121) and a second edge (122) opposite to each other, the second opening (14) having an opposite first a third edge (141) and a fourth edge (142), wherein the first edge (121) and the third edge (141) define a first discharge port (15), the second edge ( Forming a second discharge port (16) between the 122) and the fourth edge (142),

The first opening (12), the second opening (14), the first discharge opening (15) and the second discharge opening (16) are arranged on a same plane perpendicular to the rotation axis of the single conversion member (100), The first edge (121), the second edge (122), the third edge (141), and the fourth edge (142) are located on a concentric circle in a direction along a rotation axis of the single conversion member, the concentric The center of the circle is located on the axis of rotation of the single conversion member.
The flow path structure according to claim 2, wherein said single conversion member comprises a first guide piece (17) and a second guide piece (18),

In the first position (A), the edge of the first guiding piece (17) opposes the second edge (122), and the edge of the second guiding piece (18) opposes the fourth edge (142) ), thereby blocking the second discharge port (16);

In the second position (B), an edge of the first guiding piece (17) abuts the third edge (141), and an edge of the second guiding piece (18) abuts the first edge (121) ), thereby blocking the first discharge port (15).
The flow path structure according to claim 3, wherein said single conversion member further comprises a third leading piece (19), said first leading piece (17), second guiding piece (18) and third guiding piece (19) Forming a three-pointed star shape.
The flow path structure according to claim 4, wherein said third leading piece (19) does not overlap said first edge (121) and said second edge (122) during rotation of said single switching member The third edge (141) and the fourth edge (142) interfere.
The flow path structure according to claim 4, wherein the first guiding piece (17) and the third guiding piece (19) are connected by a concave first guiding surface (21);

The second guiding piece (18) and the third guiding piece (19) are connected by a concave second guiding surface (22); and/or

The first guiding piece (17) and the second guiding piece (18) are connected by a concave third guiding surface (23).
The flow path structure according to claim 6, wherein the single conversion member is formed as a hollow structure.
The flow path structure according to claim 6, wherein the single conversion member is formed with a centrally symmetrical sectional shape.
The flow path structure according to claim 3, wherein an edge of the first guiding piece (17) and/or an edge of the second guiding piece (18) is provided with a seal or an elastic member.
The volute (300) of the range hood, the volute comprising:

a first air duct (301) for communicating with the first air duct;

a second air passage (302) for communicating with the second fan;

An external exhaust vent (303) formed at a rear portion of the volute;

a circulation exhaust vent (304), the circulating vent (304) is formed at a front portion of the volute;

The volute further includes the flow path structure according to any one of claims 1-9, wherein the first air passage (301) is the first flow path, and the second air passage (302) For the second flow passage, the circulating exhaust vent (304) is the first discharge port (15), and the external exhaust vent (303) is the second discharge port (16).
The volute (300) according to claim 10, wherein a rotation shaft (24) of the single conversion member extends through the volute and is formed with an operation portion (25).
The volute (300) according to claim 11, wherein the volute is provided with a driving device for driving rotation of a rotating shaft (24) of the single conversion member.
The volute (300) according to claim 12, wherein the volute is further provided with a mode selection device and a controller, the mode selection device being electrically connected to the controller, the controller and the drive device being electrically Connecting, the mode selecting means is configured to send information of the selected working mode to the controller, the controller controlling the driving device to drive the rotating shaft (24) to rotate according to the acquired information, and The single conversion component is placed in the selected mode of operation.
A range hood includes a hood casing (305), a first fan (306), a second fan (307), and a volute according to any one of claims 10 to 13.