CN216819587U

CN216819587U - Electric machine

Info

Publication number: CN216819587U
Application number: CN202122108057.1U
Authority: CN
Inventors: 崔鹏; 许欣欣; 沈达; 胡顺林
Original assignee: Dreame Innovation Technology Suzhou Co Ltd
Current assignee: Dreame Innovation Technology Suzhou Co Ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-06-24
Anticipated expiration: 2031-09-02

Abstract

The utility model provides a motor, which comprises a shell, a motor and a motor driving device, wherein the shell is provided with at least one air inlet, at least one air outlet and an air duct communicated with the air inlet and the air outlet; a circuit board including a first substrate and a second substrate; the second substrate is distributed closer to the air outlet than the first substrate; a first electronic device group is arranged on the first substrate to form a first circuit; a second electronic device group is arranged on the second substrate to form a second circuit; the current of the first circuit is smaller than that of the second circuit, and the first circuit is electrically connected with the second circuit. The number of the substrates is increased by arranging the first substrate and the second substrate, and installation space is provided for more electronic components; meanwhile, the second substrate with higher heat productivity is arranged close to the air outlet, and cooling of the second electronic device group on the second substrate is strengthened, so that the motor running at high speed has good heat dissipation performance.

Description

Electric machine

[ technical field ] A

The utility model relates to the technical field of power devices, in particular to a motor.

[ background of the utility model ]

At present, the requirement on the rotating speed of the motor is higher and higher, the size of the shell of the motor needs to be designed to be smaller and smaller, and the power of the motor is higher and higher. Correspondingly, more and more electronic components are needed in the motor. The space for installing the electronic components on the single-layer circuit board in the existing motor cannot meet the installation of the electronic components, so that the power of the motor is low, and the requirement for high-speed operation of the motor is difficult to meet. Even when a plurality of electronic components are arranged on a single-layer circuit board, the heat dissipation effect of the circuit board is still poor.

[ Utility model ] content

Therefore, the technical problem to be solved by the utility model is that the existing motor has poor heat dissipation when the power is high; when good heat dissipation, motor power is little, and then is difficult to satisfy the demand of motor high-speed operation.

To this end, the utility model provides an electrical machine comprising

The air conditioner comprises a shell, a fan and a control device, wherein the shell is provided with at least one air inlet, at least one air outlet and an air duct communicated with the air inlet and the air outlet;

a circuit board including a first substrate and a second substrate; the second substrate is distributed closer to the air outlet than the first substrate;

the heat dissipation fan is arranged in the shell and forms airflow in the air channel;

a first electronic device group is arranged on the first substrate to form a first circuit; a second electronic device group is arranged on the second substrate to form a second circuit;

the current of the first circuit is smaller than that of the second circuit, and the first circuit is electrically connected with the second circuit.

Optionally, in the motor described above, the first substrate and the second substrate are spaced apart from each other.

Optionally, in the motor, the air outlet is formed in a side wall of the housing; the circuit board is arranged on the end face of one end of the shell, and the second substrate is adjacent to the air outlet.

Optionally, in the motor, an end of the air outlet facing the second substrate is a notch;

the second substrate is arranged at the gap of the air outlet.

Optionally, in the motor, an end surface of one end of the housing is open; the circuit board is arranged at the opening.

Optionally, in the motor, there are at least two air outlets, and a protrusion is formed between two adjacent air outlets;

the first substrate is detachably mounted on the protrusion by a fastener.

Optionally, in the motor described above, the second substrate is disposed on the first substrate;

the first substrate is arranged on the protection plate, and the first substrate is positioned between the protection plate and the second substrate; the second substrate is provided with a yielding hole for the fastener to pass through;

the protection plate is connected with the first substrate and the protrusions through the fasteners.

Optionally, in the above motor, the first electronic device group includes a micro control unit, a power supply device, at least one resistor, a capacitor device and a diode, so as to form the first circuit;

the second circuit is a three-phase topological circuit formed by a mos tube, and the first circuit is electrically connected with the second circuit.

Optionally, in the motor, at least one heat dissipation hole is formed in the first substrate and/or the second substrate, and the heat dissipation holes are distributed to avoid the first electronic device group and the second electronic device group.

Optionally, in the motor described above, the first circuit and the second circuit are electrically connected through a connector disposed between the first substrate and the second substrate, and the connector separates the first substrate and the second substrate.

The technical scheme provided by the utility model has the following advantages:

the utility model provides a motor, which comprises a shell, a motor and a motor control device, wherein the shell is provided with at least one air inlet, at least one air outlet and an air duct communicated with the air inlet and the air outlet; a circuit board including a first substrate and a second substrate; the second substrate is distributed closer to the air outlet than the first substrate; a first electronic device group is arranged on the first substrate to form a first circuit; a second electronic device group is arranged on the second substrate to form a second circuit; the current of the first circuit is smaller than that of the second circuit, and the first circuit is electrically connected with the second circuit. The number of the substrates is increased by arranging the first substrate and the second substrate, and installation space is provided for more electronic components; meanwhile, the second substrate with higher heat productivity is arranged close to the air outlet, and cooling of the second electronic device group on the second substrate is strengthened, so that the motor running at high speed has good heat dissipation performance.

[ description of the drawings ]

FIG. 1 is a schematic view of the motor of the present invention;

FIG. 2 is a partial schematic view of the motor of the present invention;

fig. 3 is a partial assembly view of the motor of the present invention.

Description of the reference numerals: 10-a housing; 11-an air inlet; 12-an air outlet; 13-open mouth; 20-a circuit board; 21-a first substrate; 22-a second substrate; 23-heat dissipation holes; 30-a first electronic device group; 40-projection; 50-protection board.

[ detailed description ] embodiments

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus are not to be construed as limiting the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the creation of the present application, the meaning of "a plurality" is two or more unless otherwise stated.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.

Example 1

The utility model provides a motor, please refer to fig. 1 and 2, comprising a housing 10 and a circuit board 20. The housing 10 has at least one air inlet 11, at least one air outlet 12, and an air duct respectively communicating with the air inlet 11 and the air outlet 12, wherein outside air enters the air duct through the air inlet 11, and is discharged through the air outlet 12 after flowing in the air duct. The circuit board 20 includes a first substrate 21 and a second substrate 22, and the second substrate 22 is located closer to the air outlet 12 than the first substrate 21, so that more air flows pass through the second substrate 22 and then is exhausted from the air outlet 12, thereby cooling the circuit board 20, especially the second substrate 22. The motor also comprises a heat radiation fan arranged on the shell and used for forming airflow in the air channel.

The first substrate 21 is provided with a first electronic device group 30 to form a first circuit, and the second substrate 22 is provided with a second electronic device group (not shown) to form a second circuit, so as to divide the electronic devices of the motor into two groups and respectively dispose the two groups on different substrates. The first circuit is electrically connected with the second circuit, and the current of the first circuit is smaller than that of the second circuit by arranging the combination of electronic devices or adjusting circuit elements and the like.

When a large current flows through the second circuit, the corresponding electronic device of the second circuit also generates a high heat value, and the second substrate 22 is arranged at a position closer to the air outlet 12, so that the air flow passing through the position of the second substrate 22 is large, the cooling of the second electronic device group is enhanced, and the motor running at high speed has good heat dissipation performance. Preferably, the second electronic device group is arranged opposite to the air outlet 12, so as to improve the air passing amount of the second electronic device group, and further enhance the cooling effect of the motor.

It should be noted that the number of the air inlets 11 and the air outlets 12 may be one, two, three, four, or more, and the specific number is not limited. When the air outlets 12 are plural, at least some of the air outlets 12 are spaced apart from each other.

Alternatively, referring to fig. 1 and 2, in the motor, the first substrate 21 and the second substrate 22 are spaced side by side, so as to leave a space for electronic devices disposed on the substrates, and facilitate air flow and heat removal. Meanwhile, the first substrate 21 and the second substrate 22 are spaced apart from each other so that the corresponding electronic devices disposed thereon are spaced apart from each other, thereby reducing heat concentration due to the heat accumulation, which may cause overheating of the motor. Preferably, the first substrate 21 and the second substrate 22 are disposed in parallel to each other to form a well-defined dual-layer circuit board 20, and have a relatively uniform cooling effect on several devices to prevent local overheating.

Optionally, referring to fig. 1, in the motor, the air outlet 12 is specifically disposed on a side wall of the housing 10, the circuit board 20 is disposed on an end surface of one end of the housing 10, and the air flow passes through the end surface of the housing 10, i.e., the position of the circuit board 20, and then is exhausted from the air outlet 12 through a side surface of the housing 10. The second substrate 22 is adjacent to the air outlet 12, so that more air flows toward the air outlet 12 through the second substrate 22, cooling of the second electronic device set is enhanced, and heat dissipation of the motor is improved.

Optionally, referring to fig. 1, in the motor, one end of the air outlet 12 facing the second substrate 22 is a notch, the notch improves the flow rate of the air flow passing through the air outlet 12, the second substrate 22 is disposed at the notch of the air outlet 12, and the air flow of the air outlet 12 directly contacts with the second substrate 22 and is also communicated with the outside, so that the air passing through the second substrate 22 is larger, and the cooling efficiency is higher.

Optionally, referring to fig. 1, in the motor, an end surface of one end of the housing 10 is an open opening 13, the circuit board 20 is disposed at the open opening 13, and the airflow can reach the circuit board 20 through the open opening 13 after flowing in the air duct, so as to realize the overall cooling of the circuit board 20 by the airflow.

Optionally, referring to fig. 1, in the motor, there are at least two air outlets 12, and a protrusion 40 is formed between two adjacent air outlets 12. The protrusion 40 is formed on the sidewall of the housing 10, and the first substrate 21 of the circuit board 20 is detachably mounted on the protrusion 40 by a fastening member. When the circuit board 20 or the motor needs to be serviced, the circuit board 20 can be removed by the protrusion 40, and the fastener can be a bolt or a buckle or a bolt assembly.

The number of the air outlets 12 may be one, two, three, four, or more, and the specific number is not limited.

Preferably, when there are three air outlets 12, there are three protrusions 40 uniformly distributed around the housing 10, and the circuit board 20 is detachably mounted on the three protrusions 40 through fasteners.

Alternatively, the motor, the first circuit and the second circuit are electrically connected through a connector disposed between the first substrate 21 and the second substrate 22, and the connector may include connection elements for electronic signals and power supply and accessories thereof. The first substrate 21 and the second substrate 22 are spaced apart by the connector, so that the first substrate 21 and the second substrate 22 have support therebetween and damage to the electronic device group is avoided. It should be noted that the connector is the prior art, and the detailed description is omitted.

Further, referring to fig. 3, in the motor, the second substrate 22 is disposed on the first substrate 21. The motor can also be provided with a protection plate 50, the first substrate 21 is arranged on the protection plate 50, the first substrate 21 is positioned between the second substrate 22 and the protection plate 50, the first substrate 21 and the protrusion 40 are fixed together through a screw or bolt assembly, and the second substrate 22 is provided with a yielding hole 51 for a fastener to pass through.

For example, the protrusion 40 is provided with a nut post 52 protruding downward, a screw 53 is inserted into the protection plate 50 and the first substrate 21, a threaded portion of the screw extends into the nut post 52, and the screw is fixed in a screw-fit manner, and the nut post 52 extends into the avoiding hole 51.

Optionally, the motor, the first electronic device group 30 comprises a micro control unit for controlling the operation of the motor, a power supply device for powering the motor, and at least one resistor, diode and capacitor device to form a first circuit, preferably the capacitor is an electrolytic capacitor. The second circuit is a three-phase topology circuit formed by mos transistors (field effect transistors) and has a larger current passing through, wherein the first circuit is electrically connected with the second circuit. It should be noted that the first circuit and the second circuit are both existing circuit arrangements, and detailed descriptions of specific principles are omitted.

Optionally, referring to fig. 2, in the motor, at least one heat dissipation hole 23 is formed on each of the first substrate 21 and the second substrate 22, or at least one heat dissipation hole 23 is formed on one of the first substrate 21 and the second substrate 22. Heat and air flow can be exchanged at both sides of the substrate through the heat dissipation holes 23, improving the heat dissipation capability of the circuit board 20. The heat dissipation holes 23 should avoid the distribution of the first electronic device group 30 and the second electronic device group, that is, the heat dissipation holes 23 are distributed at the partial positions of the first substrate 21 and the second substrate 22 where the first electronic device group 30 and the second electronic device are not disposed, so as to avoid the failure of the heat dissipation holes 23. In the present embodiment, the number of the heat dissipation holes 23 may be one, two, three, four, or more, and the specific number is not limited.

In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the utility model. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. An electric machine, comprising:

the air conditioner comprises a shell (10) and a control device, wherein the shell is provided with at least one air inlet (11), at least one air outlet (12) and an air channel communicated with the air inlet (11) and the air outlet (12);

a wiring board (20) including a first substrate (21) and a second substrate (22); the second substrate (22) is distributed closer to the air outlet (12) than the first substrate (21);

the heat dissipation fan is arranged on the shell (10) and forms airflow in the air channel;

a first electronic device group (30) is arranged on the first substrate (21) to form a first circuit; a second electronic device group is arranged on the second substrate (22) to form a second circuit;

2. The machine according to claim 1, characterized in that said first base plate (21) and said second base plate (22) are spaced side by side.

3. The machine according to claim 1 or 2, characterized in that the outlet mouth (12) is provided on a side wall of the casing (10); the circuit board (20) is arranged on the end face of one end of the shell (10), and the second substrate (22) is adjacent to the air outlet (12).

4. The machine according to claim 3, characterized in that the outlet mouth (12) is open at the end facing the second base plate (22);

the second substrate (22) is arranged at the notch of the air outlet (12).

5. The machine according to claim 4, characterised in that the end face of one end of the housing (10) is open (13); the circuit board (20) is arranged at the open opening (13).

6. The motor according to claim 4, characterized in that the number of the air outlets (12) is at least two, and a protrusion (40) is formed between two adjacent air outlets (12);

the first base plate (21) is detachably mounted on the boss (40) by a fastener.

7. The machine according to claim 6, characterised in that the second base plate (22) is provided on the first base plate (21);

the protective plate is characterized by further comprising a protective plate, wherein the first substrate (21) is arranged on the protective plate (50), and the first substrate (21) is positioned between the protective plate (50) and the second substrate (22); the second substrate (22) is provided with a yielding hole (51) for the fastener to pass through;

the protection plate (50) is connected with the first substrate (21) and the protrusion (40) through the fastener.

8. The electric machine according to claim 1 or 2, characterized in that said first electronic device group (30) comprises a micro-control unit, a power supply device, at least one resistor, a capacitor device and a diode, to form said first circuit;

9. The electrical machine according to claim 1 or 2, wherein the first substrate (21) and/or the second substrate (22) is provided with at least one heat dissipation hole (23), and the heat dissipation holes (23) are distributed to avoid the first electronic device group (30) and the second electronic device group.

10. The machine according to claim 2, characterized in that the first and second electric circuits are electrically connected by a connector provided between the first and second substrates (21, 22), the connector spacing the first and second substrates (21, 22).