Outer rotor direct current brushless driving control device for bath heater

Abstract

The utility model discloses an external rotor direct current brushless drive control device for a bath heater, which comprises an installation module, a drive module and a control module, the drive module and the control module are both installed on the installation module, the installation module comprises a base and a base cover, the base comprises a first assembly and a second assembly which are integrally formed, and the first assembly and the second assembly are integrally formed. A first accommodating cavity is formed in the first assembly, a second accommodating cavity is formed in the second assembly, and the first accommodating cavity is communicated with the second accommodating cavity; the first containing cavity is provided with a first bearing containing area and a second bearing containing area. According to the external rotor direct current brushless driving control device for the bath heater, the installation module, the driving module and the control module are linked, the control module and the driving module are integrated on the installation module, and the external rotor direct current brushless driving control device has the advantages of being high in integration level, stable in structure, small in occupied space and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of direct current brushless drive for bathroom heaters, and particularly relates to an external rotor direct current brushless drive control device for bathroom heaters. Background Art

[0002] As an important part of bathroom equipment, the performance of bathroom heaters directly affects the bathing experience of users. At present, the bathroom heaters on the market usually adopt traditional drive control devices. The motor structures of such devices are relatively simple, with low integration and large sizes, so they occupy a large space during installation, and there are problems such as high energy consumption, high noise, and short service life, which can no longer meet the pursuit of high-quality life by modern consumers.

[0003] Therefore, in view of the above problems, further improvements are made. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide an external rotor direct current brushless drive control device for bathroom heaters, which is linked through an installation module, a drive module and a control module, and integrates the control module and the drive module into the installation module, having the advantages of high integration, stable structure and small occupied space.

[0005] To achieve the above object, the utility model provides an external rotor direct current brushless drive control device for bathroom heaters, including an installation module, a drive module and a control module, wherein the drive module and the control module are both installed on the installation module, and:

[0006] The installation module includes a base and a base cover. The base includes an integrally formed first component and a second component. The inside of the first component is provided with a first accommodation cavity and the inside of the second component is provided with a second accommodation cavity, and the first accommodation cavity and the second accommodation cavity are communicated; the first accommodation cavity is provided with a first bearing placement area and a second bearing placement area. The base cover is fixedly installed on one side of the second component away from the first component. The second component is provided with a first opening, a second opening and a third opening (so that the control board is three-phase connected to the stator core through wiring for driving), and several extension blocks are provided on one side of the second component close to the first component. The extension blocks are provided with installation holes (for fixedly installing the external rotor direct current brushless drive control device for bathroom heaters at a preset position);

[0007] The driving module includes a rotor housing, a stator core, a rotating shaft, a magnetic ring, a first bearing, a second bearing and a washer. The stator core is sleeved on the first component and the stator core is wound with enameled wire. The outer side wall of the magnetic ring is fixedly installed on the inner wall of the rotor housing and the inner wall of the magnetic ring surrounds the stator core. The first end of the rotating shaft is located in the second accommodation cavity and the second end of the rotating shaft sequentially penetrates through the first accommodation cavity and the installation channel of the rotor housing and the installation channel and the rotating shaft are in interference fit. The rotating shaft is provided with a snap ring. The first bearing and the washer are both installed in the first bearing placement area and the washer is located on the side of the first bearing close to the second bearing. The second bearing is installed in the second bearing placement area. The first bearing and the second bearing are both sleeved on the rotating shaft;

[0008] The control module includes a control board and a connecting wire harness. The control board is built into the second accommodation cavity and one end of the connecting wire harness is electrically connected to the control board.

[0009] As a further preferred technical solution of the above technical solution, a plurality of installation ribs are provided on the outer wall of the first component and a plurality of installation grooves are provided on the inner wall of the stator core. The installation ribs are installed in the installation grooves.

[0010] As a further preferred technical solution of the above technical solution, the second component is provided with a wire harness installation hole, and one end of the connecting wire harness is electrically connected to the control board through the wire harness installation hole.

[0011] As a further preferred technical solution of the above technical solution, the connecting wire harness is sleeved with a heat shrinkable tube.

[0012] As a further preferred technical solution of the above technical solution, the second end of the rotating shaft is provided with installation threads.

[0013] As a further preferred technical solution of the above technical solution, the second component is further provided with a third accommodation cavity, a fourth accommodation cavity and a fifth accommodation cavity, where:

[0014] A first partition block is provided between the third accommodation cavity and the fourth accommodation cavity, a second partition block is provided between the fourth accommodation cavity and the fifth accommodation cavity, the wire harness installation hole is located between the third accommodation cavity and the fifth accommodation cavity, a third partition block is provided between the third accommodation cavity and the wire harness installation hole and a fourth partition block is provided between the fifth accommodation cavity and the wire harness installation hole;

[0015] The first partition block, the second partition block, the third partition block and the fourth partition block are all provided with cover plate installation holes, and the base cover is fixedly installed on the second component through the cover plate installation holes. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0017] Figure 2 It is a cross-sectional view of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0018] Figure 3 It is a schematic structural diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model (with the rotor housing hidden).

[0019] Figure 4 It is a schematic structural diagram of the rotor housing and the magnetic ring of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0020] Figure 5 It is a schematic structural diagram of the base of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0021] Figure 6 It is a schematic structural diagram of the base of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0022] Figure 7 It is the main control circuit diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0023] Figure 8 It is the interface circuit diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0024] Figure 9 It is the drive circuit diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0025] Figure 10 It is the speed feedback circuit diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0026] Figure 11 It is the speed regulation circuit diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0027] Figure 12 It is the zero-crossing detection circuit diagram of an external-rotor DC brushless drive control device for a bathroom heater of the present utility model.

[0028] The reference numerals include: 100, mounting module; 110, base; 111, first component; 1111, first receiving cavity; 1112, first bearing placement area; 1113, second bearing placement area; 1114, mounting rib; 112, second component; 1121, second receiving cavity; 1122, first opening; 1123, second opening; 1124, third opening; 1125, extension block; 11251, mounting hole; 1126, wire harness mounting hole; 1127, third receiving cavity; 11271, first partition block; 11272, second partition block; 11273, third partition block; 11274, fourth partition block; 11275, cover plate mounting hole; 1128, fourth receiving cavity; 1129, fifth receiving cavity; 120, base cover; 200, drive module; 210, rotor housing; 211, mounting channel; 220, stator core; 221, enameled wire; 222, mounting groove; 230, rotating shaft; 231, snap ring; 240, magnetic ring; 250, first bearing; 260, second bearing; 270, washer; 300, control module; 310, control board; 320, connecting wire harness; 330, heat shrinkable tube. Detailed implementation manners

[0029] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description of the present utility model can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0030] The present utility model discloses an external rotor DC brushless drive control device for a bathroom heater. The specific embodiments of the utility model will be further described below in conjunction with the preferred embodiments.

[0031] In the embodiments of the present utility model, those skilled in the art should note that the bathroom heaters and the like involved in the present utility model can be regarded as the prior art.

[0032] Preferred embodiment.

[0033] The present utility model discloses an external rotor DC brushless drive control device for a bathroom heater, including a mounting module 100, a drive module 200, and a control module 300. The drive module 200 and the control module 300 are both installed on the mounting module 100, wherein:

[0034] The installation module 100 includes a base 110 and a base cover 120, the base 110 includes an integrally formed first component 111 and a second component 112, the first component 111 is provided with a first accommodating cavity 1111 and the second component 112 is provided with a second accommodating cavity 1121, the first accommodating cavity 1111 and the second accommodating cavity 1121 are communicated; the first accommodating cavity 1111 is provided with a first bearing placement area 1112 and a second bearing placement area 1113, the base cover 120 is fixedly installed on a side of the second component 112 away from the first component 111, the second component 112 is provided with a first opening 1122, a second opening 1123 and a third opening 1124 (so that the control board is connected to the stator core through wiring for three-phase connection, thereby driving), and the second component 112 is provided with a plurality of extension blocks 1125 on a side close to the first component 111, and the extension blocks 1125 are provided with mounting holes 11251 (for fixing the outer rotor DC brushless drive control device for the bathroom heater at a preset position);

[0035] The driving module 200 includes a rotor housing 210, a stator core 220, a rotating shaft 230, a magnetic ring 240, a first bearing 250, a second bearing 260 and a washer 270. The stator core 220 is sleeved on the first component 111 and is wound with an enameled wire 221. The outer wall of the magnetic ring 240 is fixedly mounted on the inner wall of the rotor housing 210 and the inner wall of the magnetic ring 240 surrounds the stator core 220. The first end of the rotating shaft 230 is located in the second accommodating cavity 1121 and the second end of the rotating shaft 230 passes through the first accommodating cavity 1121 in sequence. The cavity 1111 and the installation channel 211 of the rotor housing 210 are interference fit, and the installation channel 211 and the rotating shaft 230 are provided with an open retaining ring 231 (to fix the load and limit the position), the first bearing 250 and the washer 270 are both installed in the first bearing placement area 1112, and the washer 270 is located on the side of the first bearing 250 close to the second bearing 260, the second bearing 260 is installed in the second bearing placement area 1113, and the first bearing 250 and the second bearing 260 are both sleeved on the rotating shaft 230;

[0036] The control module 300 includes a control board 310 and a connection harness 320 . The control board 310 is built into the second accommodating cavity 1121 , and one end of the connection harness 320 is electrically connected to the control board 310 .

[0037] Specifically, the outer wall of the first component 111 is provided with a plurality of mounting ridges 1114 and the inner wall of the stator core 220 is provided with a plurality of mounting grooves 222 , and the mounting ridges 1114 are installed in the mounting grooves 222 .

[0038] More specifically, the second component 112 is provided with a wire harness mounting hole 1126, and one end of the connecting wire harness 320 is electrically connected to the control board 310 through the wire harness mounting hole 1126.

[0039] Furthermore, the connecting wire harness 320 is sleeved with a heat shrinkable tube 330.

[0040] Even further, the second end of the rotating shaft 230 is provided with mounting threads.

[0041] Preferably, the second component 112 is further provided with a third receiving cavity 1127, a fourth receiving cavity 1128 and a fifth receiving cavity 1129, wherein:

[0042] A first partition block 11271 is provided between the third receiving cavity 1127 and the fourth receiving cavity 1128, a second partition block 11272 is provided between the fourth receiving cavity 1128 and the fifth receiving cavity 1129, the wire harness mounting hole 1126 is located between the third receiving cavity 1127 and the fifth receiving cavity 1128, a third partition block 11273 is provided between the third receiving cavity 1127 and the wire harness mounting hole 1126 and a fourth partition block 11274 is provided between the fifth receiving cavity 1129 and the wire harness mounting hole 1126;

[0043] The first partition block 11271, the second partition block 11272, the third partition block 1273 and the fourth partition block 11274 are all provided with cover plate mounting holes 11275, and the base cover 120 is fixedly mounted on the second component 112 through the cover plate mounting holes 11275.

[0044] Preferably, the control board 310 includes a main control circuit, an interface circuit (connected to a control terminal for obtaining speed regulation instructions, etc.), a driving circuit (driving a MOSFET to drive a motor), a speed feedback circuit and a speed regulation circuit. The interface circuit, the driving circuit, the speed feedback circuit and the speed regulation circuit are respectively electrically connected to the main control circuit, and the speed regulation circuit and the speed feedback circuit are respectively electrically connected to the interface circuit, wherein:

[0045] The main control circuit includes a control chip U1, the driving circuit includes transistors Q1, Q2 and Q3. The input ends of the transistors Q1, Q2 and Q3 are respectively electrically connected to the control chip U1 and the output ends of the transistors Q1, Q2 and Q3 are respectively connected to the enameled wires (UVW three phases) wound around the stator core;

[0046] The interface circuit includes a connection terminal P1 (i.e., a connection terminal of a connection wire harness). The rotational speed feedback circuit includes a resistor R20 and a resistor R19. The common connection terminal of the resistor R20 and the resistor R19 is electrically connected to the rotational speed feedback terminal (pin 7) of the control chip U1. One end of the resistor R19 away from the resistor R20 is connected to the power supply terminal (VDD5), and one end of the resistor R20 away from the resistor R19 is connected to the first end (pin 1, for obtaining a rotational speed command) of the connection terminal P1;

[0047] The speed control circuit includes a diode D2 and a resistor R15. The resistor R15 is connected to the anode of the diode D5, and the cathode of the diode D5 is connected to the third end (pin 3) of the connection terminal P1. One end of the resistor R15 away from the diode D2 is connected to the speed control terminal (pin 8) of the control chip U1.

[0048] Specifically, the first path of pin 1 of the transistor Q1 is electrically connected to pin 12 of the control chip U1 through a resistor R4. The second path of pin 1 of the transistor Q1 is electrically connected to pin 17 of the control chip U1 through a resistor R9. The third path of pin 1 of the transistor Q1 is electrically connected to pin 20 of the control chip U1 through a resistor R21. The pin 2 of the transistor Q1 is electrically connected to pin 2 of the control chip U1 through a resistor R1. The pin 4 of the transistor Q1 is electrically connected to pin 5 of the control chip U1 through a resistor R1;

[0049] The pin 1 of the transistor Q2 is electrically connected to pin 13 of the control chip U1 through a resistor R5. The pin 2 of the transistor Q2 is electrically connected to pin 1 of the control chip U1 through a resistor R5. The pin 4 of the transistor Q2 is electrically connected to pin 4 of the control chip U1 through a resistor R5;

[0050] The pin 1 of the transistor Q3 is electrically connected to pin 16 of the control chip U1 through a resistor R10. The pin 2 of the transistor Q3 is electrically connected to pin 24 of the control chip U1 through a resistor R12. The pin 4 of the transistor Q3 is electrically connected to pin 3 of the control chip U1 through a resistor R13.

[0051] More specifically, a parallel combination of a resistor RS1 and a resistor RS2 is connected between pin 1 of the transistor Q1 and pin 1 of the transistor Q2;

[0052] A parallel combination of a resistor RS3 and a resistor RS4 is connected between pin 1 of the transistor Q1 and pin 1 of the transistor Q3;

[0053] The first pin of the transistor Q1 is also electrically connected to the 19th pin of the control chip U1 through a resistor RS6 and a resistor R11. Both ends of the resistor RS6 are shunted by a resistor RS5, and the end of the resistor RS6 away from the transistor Q1 is grounded.

[0054] Furthermore, both ends of the resistor RS2 are also shunted by a capacitor C5, both ends of the resistor RS3 are also shunted by a capacitor C10, and both ends of the resistor RS5 are also shunted by a capacitor C9.

[0055] Even further, the control board further includes a zero-crossing detection circuit, which includes a resistor R22, a resistor R23, and a resistor R24, where:

[0056] One end of the resistor R22 is connected to the U-phase interface, and the other end of the resistor R22 is connected to the 18th pin of the control chip U1;

[0057] One end of the resistor R23 is connected to the V-phase interface, and the other end of the resistor R23 is connected to the 15th pin of the control chip U1;

[0058] One end of the resistor R24 is connected to the W-phase interface, and the other end of the resistor R24 is connected to the 14th pin of the control chip U1.

[0059] Regarding the present invention:

[0060] Regarding the mechanical structure:

[0061] After receiving the control instruction transmitted by the connection wire harness, the control board is driven. The stator core (wound with enameled wire) remains stationary, so that the magnetic ring rotates as an outer rotor. Since the magnetic ring is connected to the inner wall of the rotor housing, the rotor housing rotates. Since the rotor housing is in interference fit with the rotating shaft, the rotating shaft is finally driven to rotate.

[0062] Regarding the circuit structure:

[0063] The control chip U1 receives the control signal input by the user interruption through the interface circuit. According to the control signal and the information fed back by the current detection circuit and the speed detection circuit, corresponding control instructions are generated, and the DC brushless variable-frequency motor is driven to operate through the drive circuit. The drive circuit uses high-performance MOSFET power tubes and a PWM control chip to achieve the smooth start and speed regulation of the motor;

[0064] First, start the power module to provide a stable DC power supply for the entire control device. Then, the user can input instructions through the control interface. These instructions can be about the operation mode, wind speed, rotation direction, etc. of the bathroom heater. The control module will receive these instructions and generate corresponding control signals according to the instructions. Next, the drive circuit will receive these control signals and drive the external rotor DC brushless motor, which is used as the drive module, to rotate. Finally, the external rotor DC brushless motor realizes precise speed and rotation direction control according to the drive signals of the drive circuit, thus meeting the user's needs, effectively solving problems such as high energy consumption, high noise, and short lifespan of existing bathroom heater devices, improving the performance and user experience of the bathroom heater, and at the same time reducing the economic burden on users. This will have a positive impact on the development of the bathroom heater industry and promote its development towards a more efficient, environmentally friendly, and intelligent direction.

[0065] The external rotor DC brushless motor adopts advanced brushless technology and has a series of remarkable advantages. First of all, it has a long lifespan and can maintain stable performance during continuous operation, greatly reducing the frequency of motor replacement and saving a large amount of maintenance costs for users. Secondly, the motor has extremely low noise, enabling it to provide a quiet operating environment in various environments and creating a comfortable user experience for users.

[0066] Moreover, the external rotor DC brushless motor also has the characteristics of high overall efficiency, which can maximize the efficiency of converting electrical energy into mechanical energy, thereby improving the working efficiency and energy utilization rate of the device, and the input current in the sleep mode is about 60uA. At the same time, the motor supports variable frequency speed regulation and can adjust the motor speed according to actual needs, enabling the device to adapt to various different air volume requirements.

[0067] A remarkable feature of this device is its excellent speed response speed. When starting or adjusting the speed, the motor can respond quickly with almost no delay, and can accelerate to the maximum speed of 1400 rpm within 3S, and the motor phase current is stable and does not fluctuate during the acceleration process. This fast response characteristic is particularly important in scenarios where it is necessary to quickly reach the target speed, such as in the heating mode of the bathroom heater. When the bathroom heater needs to quickly heat up, the motor can quickly reach the required speed, thereby quickly increasing the wind speed and heat output of the impeller. This fast heating ability enables the bathroom heater to provide a comfortable warm environment in a short time, greatly improving the user experience.

[0068] In addition, due to the fast response characteristics of the device, multiple speed gears can be set to adapt to different application scenarios, and it can also be adjusted in real time according to the user's needs and environmental changes. For example, by changing the duty cycle of the PWM (pulse width modulation) signal, the speed and power output of the motor can be adjusted. In addition, multiple speed regulation curves can be configured to achieve more precise gear control. For instance, when the indoor temperature reaches the set value, the motor can quickly reduce its speed, thus avoiding overheating and energy waste. This intelligent adjustment ability makes the bathroom heater more energy-efficient and environmentally friendly.

[0069] In terms of component design, this motor adopts an installation method with components facing downwards, enabling the components to dissipate heat better. At the same time, it also improves the insulation performance, ensuring the stable operation of the motor. The installation structure of the base and the control board is carefully designed, and the three-phase wire outlet holes (the first to the third openings) are filled with silica gel, having good waterproof performance and being able to maintain stable operation even in a humid environment.

[0070] Compared with traditional brushed motors, the outer rotor brushless motor has the advantages of small size and light weight, which makes it more convenient during installation and maintenance. In addition, due to the structural characteristics of the brushless motor, less copper wire and iron core consumables are used in the manufacturing process, which is conducive to resource conservation.

[0071] To ensure the safe operation of the motor, this outer rotor DC brushless motor is also equipped with functions such as stall protection, over-temperature protection, over-current protection, over-voltage protection, and under-voltage protection. These protection measures can cut off the power supply in a timely manner when the motor shows abnormalities, prevent the motor from being damaged, and ensure the safe use of users.

[0072] Finally, to meet the needs of different markets, this motor also supports customized development. Users can adjust the parameters and performance of the motor according to their own needs, enabling the motor to better adapt to various application scenarios. This highly customized design makes the motor more competitive in the market and meets the diverse needs of different users.

[0073] In summary, the present utility model has significant advantages and effects. Its fast speed response and fast heating ability enable the bathroom heater to provide comfort and warmth while ensuring high efficiency, energy conservation, and environmental friendliness. It can be widely applied to the field of motor drive control for bathroom heaters. The implementation of this invention will help improve the performance and user experience of bathroom heaters, bringing a better user experience to users. At the same time, the popularization and application of this invention will also have a positive impact on the development of related industries.

[0074] During the startup control phase, the control chip U1 controls the driving circuit to ensure a smooth startup acceleration of the motor, eliminating the interference factors of back EMF during startup and enabling the brushless DC variable-frequency motor to start smoothly. During the speed control phase, the control chip U1 adjusts the control instructions based on the motor speed information fed back by the speed feedback circuit. During operation, the PWM speed regulation method is used to control the motor speed to achieve control of the air volume, enabling the motor to operate at the target speed. During the power control phase, the control chip U1 adjusts the control instructions based on the motor current information fed back by the current detection circuit (formed by resistors RS1 - RS6), enabling the motor to operate at the optimal power state.

[0075] For the present utility model:

[0076] 1. The three-phase wire outlet holes of the motor are filled with silicone for insulation and waterproofing:

[0077] To ensure the stability and safety of the motor during operation, the three-phase wire outlet holes are filled with silicone. As a high-quality insulating material, silicone can not only provide excellent electrical insulation performance but also effectively prevent moisture from seeping into the motor through the holes. This design ensures that the motor can operate normally even in humid or harsh environments, greatly improving the durability and reliability of the motor.

[0078] 2. The design of the motor with an outer diameter of 61 mm can ensure that the motor can be integrally installed and matched with most wind wheels on the market. This design not only simplifies the installation process but also ensures high working efficiency of the whole machine in this size design. Even when the input power of the motor is limited within 30W, it can still provide strong power output.

[0079] 3. The motor base is divided into a flat-bottom type and a convex-bottom type, and the hole position structure design can be adapted to most boxes on the market: To meet the needs of different installation scenarios, the motor base is designed in two types: flat-bottom type and convex-bottom type. Both types of bases adopt a carefully designed ten-hole position structure, which can be adapted to most boxes on the market, providing great installation convenience for users.

[0080] 4. The control board and the motor are fixed with diagonal lock screws for easy disassembly. To ensure the stable connection between the drive control board and the motor and facilitate subsequent maintenance and disassembly, the control board and the motor are fixed with diagonal lock screws. This design not only ensures the firmness of the connection but also makes the disassembly process simple and fast.

[0081] 5. The installation method with components facing downwards provides better isolation from the humid water vapor in the bathroom: In a humid bathroom environment, the protection of components is particularly important. To ensure the stability and lifespan of components, the installation method with components facing downwards is adopted. This installation method enables the components to better isolate the humid water vapor in the bathroom, reducing the risk of component damage.

[0082] 6. The brushless motor is small in size, light in weight, and consumes less copper wire and iron core: The design of the brushless motor makes it more compact in size and lighter in weight. This not only facilitates installation and use but also greatly reduces the consumption of materials such as copper wire and iron core. This design not only conforms to the concept of energy conservation and environmental protection but also saves costs for users.

[0083] 7. It supports forward and reverse rotation, can meet the function of the integrated air blowing and ventilation of the bathroom heater, has an FG speed feedback function, and supports speed regulation functions such as PWM\CLK\VSP: The motor supports forward and reverse rotation functions, which enables it to perfectly meet the functional requirements of the integrated air blowing and ventilation of the bathroom heater. At the same time, the motor is also equipped with an FG speed feedback function, which can monitor the motor speed in real time and feedback it to the control system to achieve precise speed regulation control. In addition, the motor supports multiple speed regulation methods such as PWM, CLK, and VSP, providing users with more flexible and convenient speed regulation options.

[0084] 8. Heat shrinkable sleeves are added to the wiring harness for moisture and heat insulation: To further improve the protection performance of the motor, heat shrinkable sleeves are added to the wiring harness. This kind of sleeve can effectively isolate moisture and heat, protecting the wiring harness from damage caused by moisture and high temperature. This design not only extends the service life of the wiring harness but also improves the overall stability and safety of the motor.

[0085] It is worth mentioning that the technical features of the bathroom heater and other related to the patent application of the present utility model should be regarded as the prior art. The specific structures, working principles, and possible control methods and spatial layout methods of these technical features can be selected conventionally in this field and should not be regarded as the inventive points of the patent of the present utility model. The patent of the present utility model will not be further elaborated specifically.

[0086] For those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A DC brushless drive control device for an outer rotor of a bathroom heater, characterized in that: It includes an installation module, a driving module and a control module, wherein the driving module and the control module are both installed on the installation module, wherein: The mounting module comprises a base and a base cover, the base comprises an integrally formed first component and a second component, the first component is provided with a first accommodating cavity inside and the second component is provided with a second accommodating cavity inside, the first accommodating cavity and the second accommodating cavity are communicated; the first accommodating cavity is provided with a first bearing placement area and a second bearing placement area, the base cover is fixedly mounted on a side of the second component away from the first component, the second component is provided with a first opening, a second opening and a third opening, and a side of the second component close to the first component is provided with a plurality of extension blocks, the extension blocks are provided with mounting holes; The driving module comprises a rotor housing, a stator core, a rotating shaft, a magnetic ring, a first bearing, a second bearing and a washer, the stator core is sleeved on the first component and is wound with enameled wire, the outer wall of the magnetic ring is fixedly mounted on the inner wall of the rotor housing and the inner wall of the magnetic ring surrounds the stator core, the first end of the rotating shaft is located in the second accommodating cavity and the second end of the rotating shaft sequentially passes through the first accommodating cavity and the mounting channel of the rotor housing and the mounting channel and the rotating shaft are interference fit, the rotating shaft is provided with an open retaining ring, the first bearing and the washer are both mounted in the first bearing placement area and the washer is located on the side of the first bearing close to the second bearing, the second bearing is mounted in the second bearing placement area, and the first bearing and the second bearing are both sleeved on the rotating shaft; The control module includes a control board and a connecting wire harness. The control board is built into the second accommodating cavity, and one end of the connecting wire harness is electrically connected to the control board.

2. According to claim 1, a DC brushless drive control device for an outer rotor of a bathroom heater is characterized in that: The outer wall of the first component is provided with a plurality of mounting ridges and the inner wall of the stator core is provided with a plurality of mounting grooves, and the mounting ridges are installed in the mounting grooves.

3. According to claim 2, a DC brushless drive control device for an outer rotor of a bathroom heater is characterized in that: The second component is provided with a harness installation hole, and one end of the connecting harness is electrically connected to the control board through the harness installation hole.

4. According to claim 3, the DC brushless drive control device for an outer rotor of a bathroom heater is characterized in that: The connecting wire harness is sleeved with a heat shrink tube.

5. The outer rotor DC brushless drive control device for a bathroom heater according to claim 4 is characterized in that: The second end of the rotating shaft is provided with a mounting thread.

6. The outer rotor DC brushless drive control device for a bathroom heater according to claim 5 is characterized in that: The second component is further provided with a third accommodating chamber, a fourth accommodating chamber and a fifth accommodating chamber, wherein: A first spacer is provided between the third accommodating cavity and the fourth accommodating cavity, a second spacer is provided between the fourth accommodating cavity and the fifth accommodating cavity, the wiring harness installation hole is located between the third accommodating cavity and the fifth accommodating cavity, a third spacer is provided between the third accommodating cavity and the wiring harness installation hole, and a fourth spacer is provided between the fifth accommodating cavity and the wiring harness installation hole; The first spacer, the second spacer, the third spacer and the fourth spacer are all provided with cover plate mounting holes, and the base cover is fixedly mounted on the second component through the cover plate mounting holes.

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