A type of range hood

Abstract

A range hood includes an upper housing and a smoke collection hood. A smoke baffle is mounted on the smoke collection hood, and a drive mechanism for rotating the smoke baffle is installed inside the hood. The drive mechanism includes a motor, a first hinge assembly, a second hinge assembly, and a first linkage rod. A second linkage rod and a locking mechanism are also installed inside the smoke collection hood. The first end of the second linkage rod is connected to the first hinge assembly, and the second end is connected to the second hinge assembly. When the smoke baffle is open, the second linkage rod disengages from the locking mechanism; when the smoke baffle is closed, the second linkage rod is locked by the locking mechanism. In the closed state of the smoke baffle, the second linkage rod is locked by the locking mechanism. Since both ends of the second linkage rod are mounted on corresponding hinge assemblies, locking the second linkage rod helps to close the smoke baffle, offsetting some of the baffle's own weight, making the baffle close more tightly and reliably, and also extending the motor's lifespan.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Existing side-draft range hoods typically have air inlets on the panel. To avoid the air inlets being exposed and unsightly when the range hood is not in use, and to prevent backflow of fumes, a baffle plate is installed at the air inlet. This baffle plate also serves to collect fumes when the range hood is operating. The opening and closing mechanism of the baffle plate plays a crucial role in the effective collection of fumes. Currently, a common method is to use a worm gear motor to drive the active end, while the driven end rotates without power via a driven hinge. However, this structure has a significant drawback: because the active end is only located on one side, during the closing process of the baffle plate, due to the weight of the baffle plate itself, the driven end often cannot close tightly after the active end closes, causing fumes to escape and greatly reducing the range hood's fume collection and exhaust efficiency.

[0003] To address the aforementioned issues, existing technologies have improved the structure of the smoke baffle in range hoods by using a synchronous connecting rod to fix the driven hinge and the active hinge, enabling the active and driven ends to close synchronously and effectively improving the consistency of the smoke baffle's closure. For example, Chinese invention patent No. 202010789329.6 (authorization announcement No. CN 112539436 B) discloses a smoke baffle movement mechanism and a range hood using the movement mechanism. The smoke baffle movement mechanism includes a drive mechanism and a transmission mechanism for transmitting the output of the drive mechanism to the smoke baffle. The transmission mechanism includes a first hinge and a second hinge. One of the first hinge and the second hinge is a drive arm driven by the drive mechanism, and the other of the first hinge and the second hinge is a driven arm. One end of the first hinge is hinged to the smoke baffle, and one end of the second hinge is hinged to the smoke baffle. The hinge positions of the first hinge and the second hinge with the smoke baffle are respectively arranged vertically. The end of the first connecting rod of the active end away from the second connecting rod and the end of the first connecting rod of the driven end away from the second connecting rod are connected by a connecting shaft. The connecting shaft extends in the left and right direction so that the movement mechanisms on both sides of the lower panel move synchronously and can open and close smoothly. However, in practical applications, it was found that after prolonged use, the worm motor exhibits torque decay, resulting in insufficient closing force of the smoke baffle during closure and preventing it from reaching the ideal closing angle. This, in turn, affects the performance and lifespan of the range hood, and further improvements and optimizations are still needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a range hood with a smoke baffle that can be reliably closed on both the left and right sides, in light of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a range hood, including an upper housing and a smoke collection hood installed at the bottom of the upper housing, a smoke baffle plate installed on the smoke collection hood, and a drive mechanism for driving the smoke baffle plate to rotate installed inside the smoke collection hood. The drive mechanism includes a motor, a first hinge assembly, a second hinge assembly, and a first linkage rod. The output shaft of the motor is drivenly connected to the input end of the first hinge assembly, and the output end of the first hinge assembly is fixed to the smoke baffle plate. The first end of the first linkage rod is connected to the output shaft of the motor, and the second end of the first linkage rod is connected to the input end of the second hinge assembly. The output end of the second hinge assembly is fixed to the smoke baffle plate. The feature is that: a second linkage rod and a locking mechanism are also installed inside the smoke collection hood. The first end of the second linkage rod is connected to the first hinge assembly, and the second end of the second linkage rod is connected to the second hinge assembly. When the smoke baffle plate is open, the second linkage rod disengages from the locking mechanism. When the smoke baffle plate is closed, the second linkage rod is locked by the locking mechanism.

[0006] In order for the motor to drive the first hinge assembly and the second hinge assembly to move synchronously, the motor has a first output shaft extending outward and a second output shaft extending inward. The first output shaft is connected to the input end of the first hinge assembly, and the second output shaft is connected to the first end of the first linkage rod.

[0007] The first hinge assembly and the second hinge assembly can have various structures. Preferably, the first hinge assembly includes a first link, a second link, and a third link, and the second hinge assembly includes a fourth link, a fifth link, and a sixth link. The first end of the first link is mounted on the first output shaft of the motor, the second end of the first link is rotatably connected to the first end of the second link, the second end of the second link is rotatably connected to the first end of the third link, and the second end of the third link is fixed to the smoke baffle. The first end of the fourth link is mounted on the second end of the first linkage rod, the second end of the fourth link is rotatably connected to the first end of the fifth link, the second end of the fifth link is rotatably connected to the first end of the sixth link, and the second end of the sixth link is fixed to the smoke baffle.

[0008] The second linkage rod can be installed in multiple different positions. Preferably, the first end of the second linkage rod is installed on the second connecting rod, and the second end of the second linkage rod is installed on the fourth connecting rod.

[0009] In a further preferred embodiment, the second linkage rod moves backward and downward to the rear and lower part of the first linkage rod as the smoke baffle opens, and moves forward and upward to the top of the first linkage rod as the smoke baffle closes.

[0010] To make the installation positions of the first and second linkage rods more reasonable, both the first and second linkage rods are set horizontally and parallel to each other.

[0011] There are various types of locking mechanisms; preferably, the locking mechanism is a snap-fit ​​device.

[0012] The latching device can take many forms. Preferably, the latching device includes a latching seat, a spring, and a sliding latch. The latching seat is mounted on the smoke hood. The sliding latches are a pair with their heads facing each other. The spring is installed between the base of the sliding latch and the latching seat, giving the sliding latches a tendency to move relative to each other. A slot is provided above the area between the heads of the sliding latches. The second linkage rod, after overcoming the spring force, can be limited by the sliding latch within the slot. With this configuration, when the smoke baffle is closed, the second linkage rod, under the pulling force of the hinge assembly, overcomes the spring force and moves upward into the slot. Under the spring force, it is limited by the sliding latch within the slot. When the smoke baffle is opened, the pulling force of the hinge assembly on the second linkage rod overcomes the spring force, causing the second linkage rod to disengage from the slot.

[0013] Compared with existing designs, the advantages of this utility model are as follows: This range hood installs a first linkage rod, a second linkage rod, and a locking mechanism inside the smoke collection hood. The first linkage rod drives the hinge assemblies on both sides of the smoke baffle to rotate synchronously, thereby enabling the smoke baffle to open and close normally. When the smoke baffle is closed, the second linkage rod is locked by the locking mechanism. Since the two ends of the second linkage rod are installed on the corresponding hinge assemblies, the second linkage rod, when locked, can play an auxiliary closing role for the smoke baffle, which can offset part of the weight of the smoke baffle itself, making the smoke baffle close more tightly and reliably, and also helping to extend the service life of the motor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present utility model (with the baffle closed);

[0015] Figure 2 for Figure 1 The diagram shows the structure of the range hood after removing components such as the smoke collection hood side panel;

[0016] Figure 3 for Figure 1 The diagram shows the structure of the smoke baffle and the smoke baffle driving mechanism of the range hood shown.

[0017] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0018] Figure 5 This is a cross-sectional view of the buckle device locking the second linkage rod according to an embodiment of the present utility model;

[0019] Figure 6 This is a schematic diagram of the structure of a range hood according to an embodiment of the present utility model (with the smoke baffle open);

[0020] Figure 7 for Figure 6 The side view of the range hood shown;

[0021] Figure 8 for Figure 6 The diagram shows the structure of the smoke baffle and the smoke baffle driving mechanism of the range hood shown.

[0022] Figure 9 for Figure 8 Enlarged diagram of part B. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 9 As shown, the range hood in this embodiment includes an upper housing 1 and a smoke collection hood 2 installed at the bottom of the upper housing 1. A smoke baffle 3 is installed on the smoke collection hood 2, and a drive mechanism 4 for driving the smoke baffle 3 to rotate is installed inside the smoke collection hood 2. The drive mechanism 4 includes a motor 40, a first hinge assembly 41, a second hinge assembly 42, and a first linkage rod 43. The motor 40 has a first output shaft 401 extending outward and a second output shaft 402 extending inward. The first output shaft 401 is connected to the input end of the first hinge assembly 41, and the output end of the first hinge assembly 41 is fixed to the smoke baffle 3. The second output shaft 402 of the motor 40 is connected to the first end of the first linkage rod 43, and the second end of the first linkage rod 43 is connected to the input end of the second hinge assembly 42. The output end of the second hinge assembly 42 is fixed to the smoke baffle 3. With the first linkage rod 43, the first hinge assembly 41 and the second hinge assembly 42 can move smoothly under the drive of the motor 40, thereby driving the smoke baffle 3 to open and close smoothly.

[0025] The first hinge assembly 41 of this embodiment includes a first connecting rod 411, a second connecting rod 412, and a third connecting rod 413. The second hinge assembly 42 includes a fourth connecting rod 421, a fifth connecting rod 422, and a sixth connecting rod 423. The first end of the first connecting rod 411 is mounted on the first output shaft 401 of the motor 40. The second end of the first connecting rod 411 is rotatably connected to the first end of the second connecting rod 412. The second end of the second connecting rod 412 is rotatably connected to the first end of the third connecting rod 413. The second end of the third connecting rod 413 is fixed on the smoke baffle 3. The first end of the fourth connecting rod 421 is mounted on the second end of the first linkage rod 43. The second end of the fourth connecting rod 421 is rotatably connected to the first end of the fifth connecting rod 422. The second end of the fifth connecting rod 422 is rotatably connected to the first end of the sixth connecting rod 423. The second end of the sixth connecting rod 423 is fixed on the smoke baffle 3. Driven by the motor 40, the smoke baffle 3 can be driven to rotate synchronously through the synchronous action of the first link 411, the second link 412, the third link 413, the fourth link 414, the fifth link 415, the sixth link 416, and the first linkage rod 43, thereby realizing the opening and closing of the smoke baffle 3.

[0026] Inside the smoke hood 2, a second linkage rod 5 is also installed. Both the first linkage rod 43 and the second linkage rod 5 are horizontally arranged and parallel to each other. The first end of the second linkage rod 5 is connected to the first hinge assembly 41, and the second end of the second linkage rod 5 is connected to the second hinge assembly 42. Specifically, the first end of the second linkage rod 5 is installed on the second connecting rod 412, and the second end of the second linkage rod 5 is installed on the fourth connecting rod 421.

[0027] A locking mechanism is also installed inside the smoke collection device 2. The second linkage rod 5 moves backward and downward to below the first linkage rod 43 as the smoke baffle 3 opens, and moves forward and upward to above the first linkage rod 43 as the smoke baffle 3 closes. Figure 6 As shown, when the smoke baffle 3 is open, the second linkage 5 disengages from the locking mechanism; Figure 2 As shown, when the smoke baffle 3 is closed, the second linkage rod 5 is locked by the locking mechanism.

[0028] like Figure 5As shown, the locking mechanism in this embodiment is a latching device 6, which includes a latching seat 61, a spring 62, and a sliding buckle 63. The latching seat 61 is mounted on the smoke hood 2. The sliding buckles 63 have a pair of heads facing each other. The spring 62 is installed between the root of the sliding buckle 63 and the latching seat 61, and keeps the sliding buckle 63 in a tendency to move relative to each other. A slot 64 is provided above the area between the heads of the sliding buckles 63. When the smoke baffle 3 is closed, the second linkage rod 5 can be limited in the slot 64 by the sliding buckle 63 after overcoming the elastic force of the spring 62. By locking the second linkage rod 5 with the latching device 6, part of the weight of the smoke baffle 3 can be offset, and the smoke baffle 3 can be activated to assist in closing, preventing the smoke baffle 3 from falling and helping to extend the service life of the motor 40.

[0029] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A range hood, comprising an upper housing (1) and a smoke collection hood (2) installed at the bottom of the upper housing (1), wherein a smoke baffle (3) is installed on the smoke collection hood (2), and a drive mechanism (4) for driving the smoke baffle (3) to rotate is installed inside the smoke collection hood (2), wherein the drive mechanism (4) comprises a motor (40), a first hinge assembly (41), a second hinge assembly (42), and a first linkage rod (43), wherein the output shaft of the motor (40) is drivenly connected to the input end of the first hinge assembly (41), the output end of the first hinge assembly (41) is fixed on the smoke baffle (3), the first end of the first linkage rod (43) is connected to the output shaft of the motor (40), the second end of the first linkage rod (43) is connected to the input end of the second hinge assembly (42), and the output end of the second hinge assembly (42) is fixed on the smoke baffle (3), characterized in that: Inside the smoke hood (2), a second linkage rod (5) and a locking mechanism are also installed. The first end of the second linkage rod (5) is connected to the first hinge assembly (41), and the second end of the second linkage rod (5) is connected to the second hinge assembly (42). When the smoke baffle (3) is open, the second linkage rod (5) is disengaged from the locking mechanism. When the smoke baffle (3) is closed, the second linkage rod (5) is locked by the locking mechanism.

2. The hood according to claim 1, characterized in that: The motor (40) has a first output shaft (401) extending outward and a second output shaft (402) extending inward. The first output shaft (401) is connected to the input end of the first hinge assembly (41), and the second output shaft (402) is connected to the first end of the first linkage rod (43).

3. The hood according to claim 2, characterized in that: The first hinge assembly (41) includes a first link (411), a second link (412), and a third link (413), and the second hinge assembly (42) includes a fourth link (421), a fifth link (422), and a sixth link (423). The first end of the first link (411) is mounted on the first output shaft (401) of the motor (40), and the second end of the first link (411) is rotatably connected to the first end of the second link (412). The second end of the second link (412) is rotatably connected to the first end of the second link (412). The second end of the fourth link (421) is rotatably connected to the first end of the third link (413), the second end of the third link (413) is fixed on the smoke baffle (3), the first end of the fourth link (421) is installed on the second end of the first linkage rod (43), the second end of the fourth link (421) is rotatably connected to the first end of the fifth link (422), the second end of the fifth link (422) is rotatably connected to the first end of the sixth link (423), and the second end of the sixth link (423) is fixed on the smoke baffle (3).

4. The hood according to claim 3, characterized in that: The first end of the second linkage rod (5) is mounted on the second connecting rod (412), and the second end of the second linkage rod (5) is mounted on the fourth connecting rod (421).

5. The hood according to claim 1, characterized in that: As the smoke baffle (3) opens, the second linkage rod (5) moves backward and downward to the rear and lower part of the first linkage rod (43). As the smoke baffle (3) closes, the second linkage rod (5) moves forward and upward to the top of the first linkage rod (43).

6. The hood according to claim 1, characterized in that: The first linkage rod (43) and the second linkage rod (5) are both horizontally arranged and parallel to each other.

7. The hood according to any one of claims 1 to 6, characterized in that: The locking mechanism is a snap-fit ​​device (6).

8. The hood according to claim 7, characterized in that: The buckling device (6) includes a buckle seat (61), a spring (62) and a sliding buckle (63). The buckle seat (61) is installed on the smoke hood (2). The sliding buckles (63) are a pair with their heads facing each other. The spring (62) is installed between the root of the sliding buckle (63) and the buckle seat (61) and keeps the sliding buckle (63) in a tendency to move relative to each other. A groove (64) is provided above the area between the heads of the sliding buckles (63). The second linkage rod (5) can be limited by the sliding buckle (63) in the groove (64) after overcoming the elastic force of the spring (62).

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