Relay fan capable of cooling circuit board

Abstract

The invention discloses a relay fan capable of cooling a circuit board. The relay fan capable of cooling the circuit board comprises an air exhaust motor, a heat dissipation base and the circuit board. The air exhaust motor comprises an outer shell and a motor main body. The outer shell is provided with a first opening and a second opening which are opposite. The motor body is arranged in the outer shell. One end of the motor main body is provided with a discharge port corresponding to the second opening. The heat dissipation base is arranged on an outer shell of the air exhaust motor, the circuit board can be used for supplying power to the air exhaust motor, and the circuit board is arranged on the heat dissipation base so that the heat dissipation base can be cooled through air exhaust airflow generated when the air exhaust motor operates, and therefore the circuit board can be cooled. Therefore, the use convenience and the use safety are improved.

Description

Technical Field

[0001] The invention relates to a relay fan, in particular to a relay fan which can enhance the smoke exhaust capability of a range hood and cool a circuit board. Background Art

[0002] If the existing range hood needs to extend the air duct to properly discharge the oil smoke to the outside through the air duct, the oil smoke cannot be discharged efficiently due to the excessive length of the air duct. Therefore, in order to improve the above problem, the existing technology usually installs a relay fan outside the range hood, and connects the air duct to the relay fan (or relay motor) to further extract air through the relay fan to discharge the oil smoke to the outside.

[0003] In order to control the relay fan and provide power, the prior art usually provides a control box, one end of which is electrically connected to the mains, and the other end is electrically connected to the relay fan by an extension cord, so as to control the relay fan and provide power. However, as the power consumption of the relay fan increases, the heat generated by the high-power electronic components installed on the circuit board in the control box also increases. A common method is to install a heat dissipation device in the control box to dissipate the high heat generated by the high-power electronic components, and in order to enhance the heat dissipation capacity of the heat dissipation device, a method that is usually easy to think of is to install a cooling fan. However, the cooling fan not only requires additional power, but on the other hand, the cooling fan is also prone to failure in a high temperature environment and often needs to be repaired, causing a problem that has long plagued the industry and users. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a relay fan capable of cooling a circuit board in view of the deficiencies of the prior art.

[0005] An embodiment of the present invention discloses a relay fan capable of cooling a circuit board, which is used to be arranged on the outside of a range hood body, comprising: an exhaust motor, the exhaust motor comprising an outer shell and a motor body, the outer shell having a first opening and a second opening opposite to each other, the motor body being arranged in the outer shell, and one end of the motor body having an exhaust port corresponding to the second opening; a heat sink, which is arranged in the outer shell of the exhaust motor; and a circuit board, which can be used to supply power to the motor body of the exhaust motor, and the circuit board is arranged on the heat sink so as to cool the heat sink and thus the circuit board through the exhaust airflow when the exhaust motor is running.

[0006] Preferably, the outer shell is provided with a third opening corresponding to the heat sink, and the heat sink is sunk into the outer shell through the third opening.

[0007] Preferably, the relay fan capable of cooling the circuit board further comprises: an outer cover body, the outer cover body covers the periphery of the circuit board, and the outer cover body generates at least one drainage hole.

[0008] Preferably, the heat sink is a metal heat sink in the shape of a rectangular hollow column, which is partially sunken into the outer shell. The heat sink has a heat sink wall and two side openings, the two side openings are located on both sides of the heat sink wall, and the heat sink wall is provided with a plurality of heat dissipation holes connected to the two side openings, and the two side openings are connected to the internal space of the outer cover and at least one of the drainage holes.

[0009] Preferably, the outer cover body has two opposite side cover plates, and each of the two side cover plates is formed with one drainage hole.

[0010] Preferably, the outer shell is provided with a pipe sleeve at the first opening, so that the first opening can be connected to an air duct connected to the range hood main body through the pipe sleeve.

[0011] Preferably, the relay fan capable of cooling the circuit board further comprises: a relay transceiver, which is electrically connected to the circuit board and is used to amplify and transmit the relay fan start-up signal emitted when the range hood main body is started.

[0012] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, such description and drawings are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional exploded schematic diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the combination of parts of the present invention.

[0015] Figure 3 It is a schematic diagram of the combination of the present invention.

[0016] Figure 4 It is a cross-sectional schematic diagram of the present invention.

[0017] Figure 5 It is a schematic diagram of the use state of the present invention. DETAILED DESCRIPTION

[0018] The following is an explanation of the implementation of the "relay fan capable of cooling a circuit board" disclosed in the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted in actual size. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

[0020] [Example]

[0021] See also Figures 1 to 4 The present invention provides a relay fan (hereinafter referred to as the relay fan) that can cool a circuit board, and the relay fan is used to be arranged outside a range hood body. The structure of the range hood body is not limited. The relay fan can be connected to the range hood body through an air duct P to discharge the oil smoke to the outside.

[0022] The relay fan basically includes an exhaust motor 10, a heat sink 20, and a circuit board 30. The exhaust motor 10 is located outside the range hood body. The exhaust motor 10 includes an outer shell 11 and a motor body 12. The outer shell 11 can be a metal hollow body, and the outer shell 11 has a first opening 111 and a second opening 112, and the first opening 111 and the second opening 112 can be opened on opposite sides of the outer shell 11. The motor body 12 is arranged in the outer shell 11, and one end of the motor body 12 has an exhaust port 121, and the exhaust port 121 corresponds to the second opening 112. The exhaust port 121 of the motor body 12 can also extend out of the outer shell 11 through the second opening 112, so that the oil smoke extracted by the exhaust motor 10 can be discharged outward. In addition, the outer shell 11 can also be provided with a pipe sleeve S at the first opening 111, so that the first opening 111 can be connected to a wind pipe P connected to the range hood body through the pipe sleeve S.

[0023] The circuit board 30 is electrically connected to the motor body 12 of the exhaust motor 10, and can be used to provide power and control the start and stop and speed of the motor body 12 of the exhaust motor 10, and a high-power electronic component, such as a power transistor, is disposed on the circuit board 30, and the power transistor can be a single power device, such as a MOSFET or an IGBT, and the high-power electronic component can also be a power module. The circuit board 30 is disposed on the heat sink 20, and the heat sink 20 can be directly disposed on the outer shell 11 of the exhaust motor 10, and form thermal contact conduction with the outer shell 11, so as to cool the heat sink 20 through the exhaust airflow A1 generated in the outer shell 11 when the exhaust motor 10 is running. In the present embodiment, the outer shell 11 may further be provided with a third opening 113, the shape or size of which corresponds to the heat sink 20, and the heat sink 20 may also be sunk into the outer shell 11 through the third opening 113, and may be partially or completely sunk into the outer shell 11. When the speed of the exhaust motor 10 is higher and the power consumption is higher, making the circuit board 30 hotter, the heat sink 20 can be directly cooled by the larger exhaust airflow A1 in the outer shell 11, thereby effectively cooling the circuit board 30.

[0024] Furthermore, in order to better assist in cooling the circuit board 30, the present embodiment may also be provided with an outer cover body 40, which covers the periphery of the circuit board 30, and the outer cover body 40 generates at least one drainage hole 401. When the speed of the exhaust motor 10 is higher and the power consumption is higher, making the circuit board 30 hotter, in addition to being able to cool the heat sink 20 by the larger exhaust airflow A1 in the outer shell 11, the external airflow A2 can also be driven to pass through the drainage holes 401 of the outer cover body 40, the circuit board 30 and the heat sink 20, and merge with the exhaust airflow A1, thereby more effectively cooling the circuit board 30.

[0025] Furthermore, the heat sink 20 can be a plate-shaped metal heat sink or an aluminum extruded heat sink, and can be optionally a rectangular hollow column-shaped metal heat sink with two side walls and two side openings 201, one of the side walls being a heat sink 21, the two side openings 201 being located on both sides of the heat sink 21, and the heat sink 21 also generates a plurality of heat dissipation holes 210 connected to the two side openings 201, and the two side openings 201 are connected to the internal space of the outer cover 40 and at least one drainage hole 401, so that the external airflow A2 flowing in from the drainage hole 401 can flow into the heat sink 20 through the side opening 201, and flow into the internal space of the outer shell 11 through the plurality of heat dissipation holes 210, and merge with the exhaust airflow A1. Furthermore, since the heat sink 20 is partially sunken into the outer shell 11, the exhaust air flow A1 generated in the outer shell 11 when the exhaust motor 10 is running can also flow through the heat sink 20 through the side opening 201, so that the heat sink 20 can be cooled by the external air flow A2 and the exhaust air flow A1 flowing through the heat sink 20 at the same time, thereby more effectively cooling the circuit board 30.

[0026] Furthermore, the outer cover body 40 can be made of a metal plate or a plastic plate, and is in a hollow box shape, and has two opposite side cover plates 41, and each side cover plate 41 is formed with a drainage hole 401, so that the external airflow A2 can flow in through the two opposite drainage holes 401 of the outer cover body 40. In addition, the outer cover body 40 is completely and tightly joined to the edge of the third opening 113 around its periphery, that is, the length and width of the outer cover body 40 is greater than or equal to the length and width of the third opening 113.

[0027] Please also refer to Figure 5 In this embodiment, the relay fan and the range hood main body H can be linked wirelessly, that is, when the range hood main body H is started, a relay fan start signal will be sent wirelessly to the relay fan circuit board 30 to start the exhaust motor 10 of the relay fan synchronously. However, with the increasing popularity of island kitchens or open kitchens, the kitchen is getting closer and closer to the center of the family, making the length of the air duct to the balcony or the outdoors longer and longer, which affects the exhaust efficiency. For this reason, not only one relay fan is needed, but even two or three or more are needed. When the range hood main body H is started, the relay fan start signal sent wirelessly is often blocked by the steel structure of the house and the layers of walls, and then the signal is weakened. Usually, it can only be transmitted to the nearest relay fan, so that other relay fans at a farther distance cannot be started synchronously because they do not receive the start signal. Therefore, the relay fan of this embodiment may also include a relay transceiver 50, which is electrically connected to the circuit board 30 and can be set at an appropriate position of the outer shell 11 or integrated with the circuit board 30, whereby the relay fan start signal sent when the range hood main body H is started is received by the relay transceiver 50, the signal is amplified and transmitted, so that the amplified signal can be transmitted farther, so that other relay fans at a farther distance can wirelessly receive the relay fan start signal and can be started synchronously. In addition, the relay transceivers 50 of each relay fan can also be connected in series one by one to transmit, so that the signal can be transmitted farther.

[0028] In summary, the relay fan capable of cooling a circuit board provided by the present invention includes an exhaust motor 10, a heat sink 20 and a circuit board 30. The exhaust motor 10 includes an outer shell 11 and a motor body 12. The outer shell 11 has a first opening 111 and a second opening 112 opposite to each other. The motor body 12 is disposed in the outer shell 11. One end of the motor body 12 has an exhaust port 121 corresponding to the second opening 112. The heat sink 20 is disposed on the outer shell 11 of the exhaust motor 10, and the circuit board 30 can be used to supply power to the exhaust motor 10, and is disposed on the heat sink 20 to cool the heat sink 20 and thus cool the circuit board 30 through the exhaust airflow A1 when the exhaust motor 10 is running. Thereby, the convenience and safety of use are greatly improved, thereby solving a problem that has long plagued industry practitioners and users.

[0029] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention's specification and drawings are included in the patent scope of the present invention.

Claims

1. A relay fan capable of cooling a circuit board, arranged outside a range hood body, characterized in that: include: An air extraction motor, comprising an outer shell and a motor body, the outer shell having a first opening and a second opening opposite to each other, the motor body being disposed in the outer shell, and one end of the motor body having an exhaust port corresponding to the second opening; A heat sink, which is disposed on the outer shell of the exhaust motor; and A circuit board can be used to supply power to the motor body of the exhaust motor. The circuit board is arranged on the heat sink so that the exhaust airflow when the exhaust motor is running can cool the heat sink and thus cool the circuit board.

2. The relay fan capable of cooling a circuit board according to claim 1, characterized in that: The outer shell is provided with a third opening corresponding to the heat sink, and the heat sink is sunk into the outer shell through the third opening.

3. The relay fan capable of cooling a circuit board according to claim 2, characterized in that: Also includes: An outer cover body covers the periphery of the circuit board and forms at least one drainage hole.

4. The relay fan capable of cooling a circuit board according to claim 3, characterized in that: The heat sink is a metal heat sink in the shape of a rectangular hollow column. The heat sink is partially sunken into the outer shell. The heat sink has a heat sink wall and two side openings. The two side openings are located on both sides of the heat sink wall. The heat sink wall is provided with a plurality of heat dissipation holes connected to the two side openings. The two side openings are connected to the internal space of the outer cover and at least one of the drainage holes.

5. The relay fan capable of cooling a circuit board according to claim 4, characterized in that: The outer cover body has two opposite side cover plates, and each of the two side cover plates has a drainage hole.

6. The relay fan capable of cooling a circuit board according to claim 1, characterized in that: The outer shell is provided with a pipe sleeve at the first opening, so that the first opening can be communicated with an air duct connected to the range hood main body through the pipe sleeve.

7. The relay fan capable of cooling a circuit board according to claim 1, characterized in that: Also includes: A relay transceiver is electrically connected to the circuit board and is used to amplify and transmit the relay fan start-up signal sent when the range hood main body is started.

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