External buckling split type air pipe exhaust fan

Abstract

The utility model discloses an external buckling split type air pipe exhaust fan, which comprises a shell, an air pipe and a wind wheel, the shell is provided with an accommodating cavity and a communicating hole communicated with the accommodating cavity, the air pipe is provided with an inner pipe and an outer pipe, the inner pipe is accommodated in the accommodating cavity and is positioned behind the communicating hole, the outer pipe is arranged outside the shell and is positioned in front of the communicating hole, the outer pipe is communicated with the inner pipe through the communicating hole, and the wind wheel is arranged in the accommodating cavity. The outer pipe and the inner pipe are detachably and fixedly connected with the shell on the front side and the rear side of the communicating hole respectively, and the wind wheel is contained in the inner pipe. The air pipe is configured to be the inner pipe contained in the containing cavity and the outer pipe arranged outside the shell and communicated with the inner pipe through the communicating hole, the air pipe is of a split structure, and the outer pipe and the inner pipe forming the air pipe are detachably and fixedly connected with the shell on the front side and the rear side of the communicating hole respectively, so that the connecting difficulty of the air pipe and the shell is reduced, and the connecting difficulty of the air pipe and the shell is reduced. Assembly is simple and fast.

Description

Technical Field

[0001] The utility model relates to an exhaust fan, in particular to an externally buckled split-duct exhaust fan. Background Art

[0002] An exhaust fan is a device for exchanging indoor and outdoor gases, including a housing, a duct and a wind wheel. The housing has a receiving cavity. The duct is integrally formed, with a part of it received in the receiving cavity and the other part extending out of the housing. The housing is formed by stamping and bending sheet metal parts and then riveting (or spot welding). The housing cannot be unfolded (or disassembled) during the assembly process. Since the duct is integrally formed and part of it is received in the housing and part extends out of the housing, the assembly difficulty between the duct and the housing is great. Content of the Utility Model

[0003] The purpose of the utility model is to provide an externally buckled split-duct exhaust fan to solve the problem that in the existing exhaust fan, the duct is integrally formed, part of it is received in the housing and part extends out of the housing, resulting in great assembly difficulty between the duct and the housing.

[0004] The utility model is realized through the following technical solutions:

[0005] The externally buckled split-duct exhaust fan includes a housing, a duct and a wind wheel. The housing has a receiving cavity and a communication hole communicating with the receiving cavity. The duct has an inner tube and an outer tube. The inner tube is received in the receiving cavity and is located behind the communication hole. The outer tube is arranged outside the housing and is located in front of the communication hole. The outer tube is communicated with the inner tube through the communication hole. The outer tube and the inner tube are respectively detachably and fixedly connected to the housing on the front and rear sides of the communication hole. The wind wheel is received in the inner tube.

[0006] Further, on opposite sides of the housing relative to the communication hole, an outer slot and a jack are respectively provided. The outer tube has an outer abutting portion that is annularly arranged outside the communication hole and is inserted and matched with the outer slot, and a plugging portion that is arranged on the outer abutting portion and is inserted and matched with the jack. The outer abutting portion abuts against the outer wall of the housing.

[0007] Further, the outer slot and the jack are opposite left and right. The outer slot is on the left and the jack is on the right. The plugging portion can expand and contract in the left-right direction.

[0008] Further, the outer slot extends vertically. The housing has an outer convex portion that protrudes forward on the left side of the communication hole to form the outer slot. A groove is formed on the outer abutting portion to limit the up-and-down movement of the outer convex portion when it is inserted and matched with the outer slot.

[0009] Further, the plugging portion has a U-shaped portion and two limiting portions. The U-shaped portion is arranged on the outer abutting portion and is in plugging fit with the communication hole. The two limiting portions are opposite to each other before and after on the U-shaped portion and cooperate with the U-shaped portion to form a limiting hole that is in snap-fit with the housing.

[0010] Further, a reinforcing rib is provided between the U-shaped portion and the outer abutting portion.

[0011] Further, a retaining strip for restricting the downward movement of the outer tube is provided on the housing below the outer abutting portion.

[0012] Further, the inner tube has an inner abutting portion that is arranged around the communication hole and abuts against the wall of the accommodating cavity. The housing is provided with inner slots that are in plugging fit with the inner abutting portion on opposite sides of the communication hole.

[0013] Further, the wall of the accommodating cavity is provided with a first connecting ear, and the inner tube has a second connecting ear that is connected to the first connecting ear.

[0014] The advantages of this technical solution are as follows: By configuring the air duct into an inner tube accommodated in the accommodating cavity and an outer tube arranged outside the housing and communicating with the inner tube through the communication hole, since the air duct adopts a split structure, the outer tube and the inner tube that make up the air duct are respectively detachably and fixedly connected to the housing on the front and rear sides of the communication hole. Therefore, the connection difficulty between the air duct and the housing is reduced, and the assembly is simple and fast. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0017] Figure 1 is a perspective view of the externally split air duct exhaust fan disclosed in the embodiment;

[0018] Figure 2 is an exploded view of the externally split air duct exhaust fan disclosed in the embodiment;

[0019] Figure 3 is a cross-sectional view of the externally split air duct exhaust fan disclosed in the embodiment;

[0020] Figure 4 is Figure 3 a partial enlarged view at A in

[0021] Figure 5 is Figure 3 The partial enlarged view at position B in

[0022] Figure 6 is the perspective view of the housing in the embodiment;

[0023] Figure 7 is the assembled perspective view of the inner tube and the wind wheel in the embodiment;

[0024] Figure 8 is the perspective view of the outer tube in the embodiment;

[0025] Figure 9 is Figure 8 the partial enlarged view at position C in Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0027] Embodiment: As Figures 1-9 shown, the externally buckled split duct exhaust fan includes a housing 1, a duct 2 and a wind wheel 3. The housing 1 has a receiving cavity 101 and a communication hole 102 communicating with the receiving cavity 101. The duct 2 has an inner tube 201 and an outer tube 202. The inner tube 201 is received in the receiving cavity 101 and is located behind the communication hole 102. The outer tube 202 is provided outside the housing 1 and is located in front of the communication hole 102. The outer tube 202 is communicated with the inner tube 201 through the communication hole 102. The outer tube 202 and the inner tube 201 are respectively detachably and fixedly connected to the housing 1 on the front and rear sides of the communication hole 102. The wind wheel 3 is received in the inner tube 201. This embodiment provides an externally buckled split duct exhaust fan to solve the problem that the duct of the existing exhaust fan is integrally formed and part of it is received in the housing and part extends out of the housing, and the assembly difficulty between the duct and the housing is large. The main solution is to configure the duct 2 into an inner tube 201 received in the receiving cavity 101 and an outer tube 202 provided outside the housing 1 and communicated with the inner tube 201 through the communication hole 102. Since the duct 2 adopts a split structure, the outer tube 202 and the inner tube 201 that make up the duct 2 are respectively detachably and fixedly connected to the housing 1 on the front and rear sides of the communication hole 102, reducing the connection difficulty between the duct 2 and the housing 1, and the assembly is simple and fast.

[0028] In the embodiment of the present utility model, the housing 1 is provided with an outer slot 103 and a socket 104 on opposite sides of the communication hole 102. The outer tube 202 has an outer abutting portion 203 that is annularly arranged outside the communication hole 102 and is inserted and cooperated with the outer slot 103, and a plugging portion 204 that is arranged on the outer abutting portion 203 and is inserted and cooperated with the socket 104. The outer abutting portion 203 abuts against the outer wall of the housing 1. Specifically, the outer slot 103 and the socket 104 are opposite left and right, the outer slot 103 is on the left, the socket 104 is on the right, and the plugging portion 204 can elastically expand and contract in the left-right direction. Specifically, the outer tube 202 is inserted into the housing 1 from right to left. When the outer tube 202 moves from right to left, first the outer abutting portion 203 is inserted into the outer slot 103, and then the plugging portion 204 is inserted into the socket 104. The above setting realizes the detachable fixed connection between the outer tube 202 and the housing 1 by providing a slot 103 on the left side of the communication hole 102 that is inserted and cooperated with the outer abutting portion 203, and a socket 104 on the right side of the communication hole 102 that is inserted and cooperated with the plugging portion 204, so that one end of the outer tube 202 is inserted into the outer slot 103 and the other end is inserted into the socket 104. The connection structure is simple and the disassembly and assembly are fast. Also, since the plugging portion 204 can elastically expand and contract in the left-right direction, it is convenient for the plugging portion 204 to be inserted into or disengaged from the socket 104.

[0029] In the embodiment of the present utility model, the outer slot 103 extends vertically. The housing 1 has an outer convex portion 105 that protrudes forward on the left side of the communication hole 102 to form the outer slot 103. A groove 205 is formed on the outer abutting portion 203 to limit the up and down movement of the outer convex portion 105 when it is inserted and cooperated with the outer slot 103. The above setting makes the connection between the outer tube 202 and the housing 1 stable by providing a groove 205 on the outer abutting portion 203 to limit the up and down movement of the outer convex portion 105 when it is inserted and cooperated with the outer slot 103.

[0030] In the embodiment of the present utility model, the plugging portion 204 has a U-shaped portion 206 and two limiting portions 207. The U-shaped portion 206 extends rightward from the outer abutting portion 203 and is recessed backward to be inserted and cooperated with the communication hole 102. The two limiting portions 207 are arranged front and back on the right side of the U-shaped portion 206 and cooperate with the U-shaped portion 206 to form a limiting hole 208 that is clamped and cooperated with the housing 1. The limiting hole 208 restricts the U-shaped portion 206 from disengaging from the communication hole 102. The above setting makes the connection between the outer tube 202 and the housing 1 stable by configuring the plugging portion 204 into a U-shaped portion 206 that is inserted and cooperated with the communication hole 102 and limiting portions 207 that are arranged front and back on the right side of the U-shaped portion 206 to form the limiting hole 208.

[0031] In the embodiment of the present utility model, reinforcing ribs 209 are provided between the U-shaped portion 206 and the outer abutting portion 203. The number of the reinforcing ribs 209 is several, and the several reinforcing ribs 209 are arranged at intervals up and down. The above setting makes the plugging portion 204 have good structural stability and is not easily deformed or broken by providing the reinforcing ribs 209 between the U-shaped portion 206 and the outer abutting portion 203.

[0032] In an embodiment of the present utility model, a retaining strip 106 for restricting the downward movement of the outer tube 202 is provided below the outer abutting portion 203 of the housing 1. Through the above arrangement, by providing the retaining strip 106 for restricting the downward movement of the outer tube 202 below the outer abutting portion 203, the outer tube 202 is stably assembled with the housing 1 and is not easily detached.

[0033] In an embodiment of the present utility model, the inner tube 201 has an inner abutting portion 210 that is annularly arranged outside the communication hole 102 and abuts against the wall of the accommodating cavity 101. The housing 1 is provided with inner slots 107 that are inserted and matched with the inner abutting portion 210 on opposite sides of the communication hole 102. Through the above arrangement, by providing the inner slots 107 that are inserted and matched with the inner abutting portion 210 on opposite sides of the communication hole 102, a guiding and connecting function is achieved when the inner tube 201 is inserted into the accommodating cavity 101 from bottom to top, making the connection between the inner tube 201 and the housing 1 simple and convenient.

[0034] In an embodiment of the present utility model, the wall of the accommodating cavity 101 is provided with a first connecting ear (not marked in the figure), and the inner tube 201 has a second connecting ear 211 that is connected to the first connecting ear. Through the above arrangement, by providing the first connecting ear on the wall of the accommodating cavity 101 and providing the second connecting ear 211 that is connected to the first connecting ear on the inner tube 201, the connection between the inner tube 201 and the housing 1 is made simple and convenient.

[0035] It should be understood that in the present utility model, terms such as "first" and "second" are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information can also be referred to as the "second" information, and similarly, the "second" information can also be referred to as the "first" information. In addition, the orientation or positional relationship indicated by terms such as "center of the circle", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of the present utility model is only limited to these descriptions. Any approximation, similarity, or several technical deductions or replacements made under the premise of the concept of the present utility model should be regarded as the protection scope of the present utility model.

Claims

1. An external split duct exhaust fan, comprising a housing, a duct and a wind wheel, characterized in that: The shell has a accommodating cavity and a connecting hole connected to the accommodating cavity, the air duct has an inner tube and an outer tube, the inner tube is accommodated in the accommodating cavity and is located behind the connecting hole, the outer tube is arranged outside the shell and is located in front of the connecting hole, the outer tube is connected to the inner tube through the connecting hole, the outer tube and the inner tube are detachably fixedly connected to the shell at the front and rear sides of the connecting hole, respectively, and the wind wheel is accommodated in the inner tube.

2. The external split duct exhaust fan according to claim 1, characterized in that: The shell is respectively provided with an outer insertion slot and a plug hole on opposite sides of the connecting hole. The outer tube has an outer abutment portion arranged outside the connecting hole and plugged with the outer insertion slot, and a plugging portion arranged on the outer abutment portion and plugged with the plug hole. The outer abutment portion abuts against the outer wall of the shell.

3. The external split duct exhaust fan according to claim 2, characterized in that: The outer slot and the insertion hole are opposite to each other, the outer slot is on the left, and the insertion hole is on the right, and the plug-in portion can be extended and retracted in the left-right direction.

4. The external split duct exhaust fan according to claim 3, characterized in that: The outer slot extends up and down, the shell has an outer protrusion extending forward from the left side of the connecting hole to form the outer slot, and the outer abutment is formed with a groove to limit the upward and downward movement of the outer protrusion when it is plugged into the outer slot.

5. The external split duct exhaust fan according to claim 2, characterized in that: The plug-in portion comprises a U-shaped portion and two stopper portions, wherein the U-shaped portion is arranged on the outer abutment portion and plugged into the connecting hole, and the two stopper portions are arranged on the U-shaped portion in a front-to-back relationship and cooperate with the U-shaped portion to form a limit hole that is snap-fitted with the shell.

6. The external split duct exhaust fan according to claim 5, characterized in that: A reinforcing rib is provided between the U-shaped portion and the outer abutment portion.

7. The external split duct exhaust fan according to claim 2, characterized in that: The shell is provided with a blocking bar below the outer abutment portion to limit the outer tube from moving downward.

8. The external split duct exhaust fan according to claim 1, characterized in that: The inner tube has an inner abutment portion which is arranged outside the communicating hole and abuts against the wall of the accommodating cavity. The shell is provided with inner slots which are plugged and matched with the inner abutment portion on opposite sides of the communicating hole.

9. The external split duct exhaust fan according to claim 1, characterized in that: The wall of the accommodating chamber is provided with a first connecting ear, and the inner tube has a second connecting ear connected to the first connecting ear.

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