Fan control system with explosion-proof function
By introducing temperature fuses and temperature control switches into the fan control system, combined with current fuses, the safety problem caused by overheating of the fan in high-temperature environments is solved, achieving safer and more reliable operation and explosion-proof protection.
Patent Information
- Application Number
- CN202520044939.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Existing fan control systems are prone to damage to insulation materials and safety accidents due to overheating of power devices and motor windings in high-temperature environments, posing a fire risk.
Temperature fuses and temperature control switches are introduced into the fan control system to sense the temperature of power devices and motor windings, respectively, and automatically melt or disconnect the circuit when the temperature exceeds the limit. Combined with current fuses, they provide dual protection.
It effectively prevents equipment damage and safety accidents caused by overheating, improves the safety and reliability of the system in high-temperature environments, extends service life, reduces maintenance costs, and provides explosion-proof function in flammable and explosive environments.
Smart Images
Figure CN223928078U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a fan control system technical field, concretely relates to a fan control system with explosion -proof function. BACKGROUND
[0002] At present, with the continuous development of electronic equipment, as the core component of the heat dissipation system, the fan is widely used in the cooling process of various large-scale equipment. In these applications, the control system of the fan includes multiple power devices, which will generate heat when the fan is running. Especially in high temperature environment, such as the heat dissipation system of large-scale equipment, the fan and its control system face more severe heat dissipation challenges.
[0003] At present, in the prior art, the temperature of the power device in the fan control system will gradually rise after long time running. When the fan works in high temperature environment, the accumulation of heat will cause the temperature of the power device to further rise, thereby increasing the temperature of the whole control system. Since the winding of the fan motor is mainly composed of enameled wire and silicon steel sheet, the insulation performance of the enameled wire will decrease with the increase of temperature, and when the temperature exceeds its bearing range, the enameled wire insulation layer may be damaged, resulting in short circuit or machine damage. This situation not only damages the fan itself, but also may cause fire and other safety accidents, which poses a serious threat to personnel safety and equipment integrity.
[0004] Therefore, how to provide a fan control system with explosion -proof function, so that the fan can run more safely and reliably in high temperature environment, and can effectively prevent equipment damage and safety accidents caused by overheating, is a problem that the technical personnel in the field are eager to solve at present. CONTENT OF THE UTILITY MODEL
[0005] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a fan control system with explosion -proof function, which aims to solve the problem of how to make the fan run more safely and reliably in high temperature environment, and can effectively prevent equipment damage and safety accidents caused by overheating.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A fan control system with explosion -proof function, wherein, including power supply, multiple power devices connected with the power supply, and motor connected with the power device;Wherein,
[0008] The temperature fuse is connected between each power device and the power supply, which is used to sense the working temperature of the corresponding power device, and automatically melts when the working temperature of the corresponding power device is higher than the action temperature;
[0009] The motor is equipped with a temperature control switch connected to its internal windings. The temperature control switch is used to sense the operating temperature of the windings and automatically disconnects when the operating temperature of the windings is higher than its operating temperature.
[0010] In a further technical solution, the fan control system with explosion-proof function is wherein each of the temperature fuses is connected to the power supply via a current fuse.
[0011] In a further technical solution, the fan control system with explosion-proof function includes a power device comprising a drive MOS and a reverse connection protection MOS.
[0012] In a further technical solution, the fan control system with explosion-proof function, wherein the motor is a three-phase motor.
[0013] In a further technical solution, the fan control system with explosion-proof function is provided, wherein both windings in the motor are connected to the temperature control switch.
[0014] In a further technical solution, the fan control system with explosion-proof function is provided, wherein the power source is direct current.
[0015] In a further technical solution, the fan control system with explosion-proof function is provided, wherein the power source is alternating current.
[0016] Compared to existing technologies, this utility model provides a fan control system with explosion-proof function, comprising a power supply, multiple power devices connected to the power supply, and a motor connected to the power devices. Each power device is connected to the power supply with a thermal fuse, which senses the operating temperature of its corresponding power device and automatically melts when the operating temperature of the corresponding power device exceeds its operating temperature. The motor has a temperature control switch connected to its internal windings, which senses the operating temperature of the windings and automatically disconnects when the operating temperature of the windings exceeds its operating temperature. Thus, the fan control system provided by this utility model enables the fan to operate more safely and reliably in high-temperature environments and effectively prevents equipment damage and safety accidents caused by overheating. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of a fan control system with explosion-proof function provided in an embodiment of the present invention. Detailed Implementation
[0019] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0020] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," and "right," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or an electrical signal connection (meaning that there is both an electrical connection and a signal connection between the two); they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. When a component is referred to as being "fixed to" or "set on" another element, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening component. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0022] In the description of this utility model, the terms "comprising," "including," "having," and "containing" are all open-ended terms, meaning that they include but are not limited to. The terms "one embodiment," "one specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in each embodiment is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.
[0023] The various non-limiting embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0024] Please see Figure 1 This utility model embodiment provides a fan control system with explosion-proof function, comprising a power supply 1, a plurality of power devices 2 connected to the power supply 1, and a motor 3 connected to the power devices 2; wherein,
[0025] Each of the power devices 2 is connected to the power supply 1 with a thermal fuse 4. The thermal fuse 4 is used to sense the operating temperature of the corresponding power device 2 and automatically melts when the operating temperature of the corresponding power device 2 is higher than its operating temperature.
[0026] The motor 3 is equipped with a temperature control switch 5 connected to its internal winding 31. The temperature control switch 5 is used to sense the working temperature of the winding 31 and automatically disconnects when the working temperature of the winding 31 is higher than its operating temperature.
[0027] In this embodiment, the fan control system implements multiple protection mechanisms in high-temperature environments by connecting a thermal fuse in series between each power device and the power supply, and integrating a temperature control switch within the motor windings. When the fan control system operates in a high-temperature environment, the temperature of the power devices and motor windings may rise. The thermal fuses and temperature control switches are each set with specific operating temperatures. Once the temperature of the power devices or motor windings exceeds these preset values, the thermal fuses will automatically melt, and the temperature control switches will automatically disconnect the circuit, thereby immediately cutting off the power supply and stopping the fan. This design not only prevents damage to the power devices due to overheating but also avoids the risk of insulation degradation or fire caused by overheating of the motor windings. In this way, the fan control system can operate more safely and reliably in high-temperature environments, effectively preventing equipment damage and safety accidents caused by overheating, thus improving the stability and safety of the entire system. Furthermore, this design helps extend the service life of the fan control system, reduces maintenance costs, and ensures safe operation in potentially flammable and explosive environments, achieving explosion-proof (deflagration, explosion) functionality.
[0028] Among them, power devices refer to electronic components used in fan control systems that can process and control electrical energy. They are usually used in high-power circuits and can withstand large currents and voltages. The main functions of power devices in fan control systems include frequency conversion, voltage conversion, current conversion, power management and other circuit processing actions to achieve effective conversion and control of electrical energy.
[0029] Furthermore, in one embodiment, the explosion-proof fan control system wherein each of the temperature fuses 4 is connected to the power supply 1 via a current fuse 6.
[0030] In this embodiment, the explosion-proof fan control system further enhances its safety protection layer by adding current fuses between each temperature fuse and the power supply. The current fuse's function is to melt and disconnect the circuit when the current abnormally increases, preventing excessive current from damaging power devices and motor windings. This design means that in high-temperature environments, if an abnormal current occurs for some reason, the current fuse will respond first, providing the first layer of protection. If the current fuse fails to completely prevent the temperature rise, or if the temperature still rises to a dangerous level under normal operating current, the temperature fuse will act as the second layer of protection, ensuring that the power supply is cut off when the temperature exceeds a safe threshold. This dual-protection mechanism significantly improves the reliability and safety of the fan control system in high-temperature environments, effectively preventing equipment damage and safety accidents caused by overheating or overcurrent, while also providing more comprehensive explosion-proof protection for the system.
[0031] Furthermore, in one embodiment, the fan control system with explosion-proof function includes a power device 2 comprising a drive MOS and a reverse connection protection MOS.
[0032] In this embodiment, the explosion-proof fan control system incorporates two power devices: a driving MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) and a reverse-connection protection MOS. This configuration enables more precise and safer motor control. The driving MOS precisely controls the motor's start, stop, and speed adjustment, while the reverse-connection protection MOS ensures the motor will not start when the power supply polarity is incorrect, preventing potential circuit damage or safety accidents. This configuration not only improves the reliability and stability of the fan control system but also enhances its explosion-proof characteristics by preventing reverse power connection and overheating. This allows the fan to operate safely even in high-temperature or harsh environments, effectively preventing equipment damage and potential explosion risks caused by reverse power connection or overheating.
[0033] Furthermore, in one embodiment, the fan control system with explosion-proof function, wherein the motor 3 is a three-phase motor.
[0034] Furthermore, in the aforementioned explosion-proof fan control system, both windings 31 within the motor 3 are connected to the temperature control switch 5.
[0035] In this embodiment, within the explosion-proof fan control system, the motor is designated as a three-phase motor (with three windings), and temperature control switches are connected to two of the windings. This enables comprehensive temperature monitoring and protection of the three-phase motor. Compared to single-phase motors, three-phase motors offer more stable and efficient operation, making them suitable for high-power and high-performance applications. The dual connection of the temperature control switches ensures timely detection and response when the winding temperature rises abnormally, automatically disconnecting to prevent insulation damage or fire risks caused by overheating. This design not only improves the safety and reliability of the fan control system in high-temperature environments but also optimizes motor operating efficiency through precise control of the three-phase current, while enhancing the system's explosion-proof performance and ensuring stable operation in potentially flammable and explosive environments.
[0036] Furthermore, in one embodiment, the explosion-proof fan control system wherein the power supply 1 is direct current.
[0037] In this embodiment, the power supply is designated as direct current (DC) in the explosion-proof fan control system, enabling more efficient motor control and energy conversion. DC power provides a stable current to the motor, improving its operating efficiency and response speed. Furthermore, the stability of DC power helps reduce electric arcs and sparks during motor operation, potential ignition sources, which is especially important in flammable and explosive environments. By using DC power, the fan control system can operate more safely in high-temperature and potentially flammable and explosive environments, while reducing the risks caused by power fluctuations or electrical faults. These characteristics of DC power, combined with the protection of thermal fuses and temperature control switches, further enhance the system's explosion-proof performance, ensuring reliability and safety under harsh operating conditions.
[0038] Furthermore, in one embodiment, the explosion-proof fan control system wherein the power source 1 is alternating current.
[0039] In this embodiment, the power supply for the explosion-proof fan control system is specified as alternating current (AC). The system can utilize the inherent characteristics of AC to achieve specific technical effects. AC allows for conversion to direct current using a simple rectifier circuit, which is then used in brushless direct current (BLDC) motors favored for their high efficiency and long lifespan. Furthermore, the periodic variation of AC helps generate a uniform magnetic field in the motor windings, improving motor operating efficiency and torque output. Regarding explosion-proof performance, the use of AC does not directly affect the explosion-proof capability, but the system design can include appropriate conversion and control circuitry to ensure safety. For example, after converting AC to DC via a rectifier, the stability of DC can be used to control the motor, while power devices and temperature control switches manage the motor's operating status, ensuring safe operation in high-temperature or flammable / explosive environments. Therefore, even with AC power, the fan control system can still achieve efficient and reliable operation through carefully designed conversion and control circuitry, providing overheat protection when necessary to prevent equipment damage and accidents. This design allows the fan control system to be used flexibly in a wide range of applications, including environments requiring explosion-proof measures.
[0040] Based on the explosion-proof fan control system provided in the above embodiments, another embodiment of the present invention provides an axial flow fan, wherein the axial flow fan includes the explosion-proof fan control system described in any of the above embodiments, as specifically described above, and will not be repeated here.
[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0042] The embodiments described above are merely examples illustrating several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be understood that the application of this utility model is not limited to the examples described above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A fan control system with explosion-proof function, characterized in that, It includes a power supply (1), multiple power devices (2) connected to the power supply (1), and a motor (3) connected to the power devices (2); wherein, Each of the power devices (2) is connected to the power supply (1) with a thermal fuse (4). The thermal fuse (4) is used to sense the operating temperature of the corresponding power device (2) and automatically melts when the operating temperature of the corresponding power device (2) is higher than its operating temperature. The motor (3) is equipped with a temperature control switch (5) connected to its internal winding (31). The temperature control switch (5) is used to sense the working temperature of the winding (31) and automatically disconnects when the working temperature of the winding (31) is higher than its operating temperature.
2. The fan control system with explosion-proof function according to claim 1, characterized in that, Each of the temperature fuses (4) is connected to the power supply (1) via a current fuse (6).
3. The fan control system with explosion-proof function according to claim 1, characterized in that, The power device (2) includes a driving MOS and a reverse connection protection MOS.
4. The fan control system with explosion-proof function according to claim 1, characterized in that, The motor (3) is a three-phase motor.
5. The fan control system with explosion-proof function according to claim 4, characterized in that, The two windings (31) inside the motor (3) are each connected to the temperature control switch (5).
6. The fan control system with explosion-proof function according to any one of claims 1-5, characterized in that, The power source (1) is direct current.
7. The fan control system with explosion-proof function according to any one of claims 1-5, characterized in that, The power source (1) is alternating current.