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CN-122004589-A - Multi-channel blower driven by multiple motors alternately and control method thereof

CN122004589ACN 122004589 ACN122004589 ACN 122004589ACN-122004589-A

Abstract

The invention discloses a multi-channel blower driven by multiple motors alternately and a control method thereof, and relates to the technical field of personal care appliances. The air conditioner comprises a U-shaped shell, at least two groups of air outlets, at least two groups of air channel systems and a control unit, wherein the U-shaped shell is of a U-shaped structure, at least two groups of air outlets are arranged on the inner side of the shell and are used for surrounding the head of a user to supply air when the air conditioner is used, the bottoms of the two ends of the shell are respectively provided with a left air inlet and a right air inlet, the at least two groups of air channel systems are arranged in the U-shaped shell, each group of air channel systems comprises a motor and a heating body, and the control unit is arranged in the U-shaped shell and is respectively and electrically connected with each group of air channel systems and used for controlling the alternating work of each group of air channel systems. On the premise of ensuring the safety compatibility of the household socket, the invention realizes equivalent high-power quick hair drying, surrounding type comfortable air supply, intelligent self-adaptive adjustment and multiple safety protection, and overcomes the technical problems of overload socket, local overheating of the traditional blower and the like caused by the power superposition of the existing double-air-duct blower.

Inventors

  • YING JINHUA

Assignees

  • 苏州工业园区兴尔科技有限公司

Dates

Publication Date
20260512
Application Date
20260403

Claims (10)

  1. 1. A multi-motor, alternately driven, multi-channel blower comprising: The U-shaped shell (1) is in a U-shaped structure, at least two groups of air outlets are arranged on the inner side of the shell and used for surrounding the head of a user to supply air when in use, and the bottoms of the two ends of the shell are respectively provided with a left air inlet (103) and a right air inlet (104); At least two groups of air duct systems are arranged in the U-shaped shell, and each group of air duct systems comprises a motor and a heating body; the control unit (4) is arranged in the U-shaped shell (1) and is respectively and electrically connected with each group of air duct systems and used for controlling each group of air duct systems to work alternately; The control unit (4) is configured to conduct only one group of air duct systems at any time, and enable the air duct systems of each group to work alternately at a switching frequency of 20Hz to 50Hz, the nominal total power of the whole machine is larger than 2200W, and the instantaneous input power at any time is not more than 2200W.
  2. 2. A multi-motor alternately driven multi-duct blower as set forth in claim 1 wherein the air outlet comprises a left air outlet (101) and a right air outlet (102) respectively disposed on two sides of the U-shaped housing (1), the air duct system comprises a first air duct system (2) disposed inside the left end of the U-shaped housing (1) and a second air duct system (3) disposed inside the right end of the U-shaped housing (1), the first air duct system (2) comprises a first motor (201) and a first heating body (202), and the second air duct system (3) comprises a second motor (301) and a second heating body (302).
  3. 3. A multi-motor, alternatively driven, multi-channel blower according to claim 1, wherein the control unit (4) comprises: The main control MCU is used for generating a pulse width modulation signal; the zero-crossing detection circuit (5) is connected to the MCU and used for detecting the zero crossing point of alternating current; The first silicon controlled rectifier driving circuit and the second silicon controlled rectifier driving circuit are respectively connected to the MCU and are alternately conducted under the control of the MCU; The first bidirectional thyristor (6) and the second bidirectional thyristor (7) are respectively connected between the first air duct system (2) and the alternating current power supply, and between the second air duct system (3) and the alternating current power supply, and are controlled by corresponding thyristor driving circuits.
  4. 4. The multi-motor alternately driven multi-channel hair dryer as set forth in claim 1, wherein a distance sensor (10) is further disposed at the air outlet of the U-shaped housing (1), the distance sensor (10) is electrically connected with the control unit (4) and is used for detecting the distance between the air outlet and the hair, and the control unit (4) adjusts the switching frequency in real time according to the distance.
  5. 5. A multi-motor, alternatively driven, multi-channel blower according to claim 4, wherein the control unit (4) is configured to: When the distance is smaller than a first threshold value, the switching frequency is increased to 40Hz to 50Hz; when the distance is greater than a second threshold, the switching frequency is reduced to 20Hz to 30Hz.
  6. 6. The method of claim 5, wherein the first threshold is 10cm and the second threshold is 20cm.
  7. 7. The control method of the multi-channel blower driven by the multiple motors alternately according to claim 1 is characterized in that a temperature sensor (8) is further arranged at an air outlet of the U-shaped shell (1) and used for monitoring the air outlet temperature in real time and feeding the air outlet temperature back to the control unit (4), and when the air outlet temperature exceeds a safety threshold value, the control unit (4) reduces the power or the duty ratio of a corresponding heating body.
  8. 8. A control method of a multi-channel blower driven by multiple motors alternately, applied to the blower as claimed in any one of claims 1 to 7, comprising the steps of: at any moment, the control unit (4) only conducts any group of air duct systems to enable the air duct systems to work with 2200W of power; The multi-group air duct system carries out high-frequency switching at the frequency of 20Hz to 50Hz, and the working time of each group of air duct system is equal in a complete switching period; The nominal total power of the whole machine is 4400W, but the instantaneous input power at any moment is less than or equal to 2200W, and the power is suitable for a common household 10A socket.
  9. 9. The control method according to claim 8, characterized by further comprising: Detecting the distance between the air outlet and the hair by a distance sensor (10); When the distance is detected to be smaller than a first threshold value, the switching frequency is increased to 40Hz to 50Hz; When the distance is detected to be greater than the second threshold, the switching frequency is reduced to 20Hz to 30Hz.
  10. 10. The control method according to claim 8, characterized by further comprising: The temperature sensor (8) monitors the temperature of the air outlet in real time; And when the temperature of the air outlet exceeds a safety threshold, reducing the power or the duty ratio of the corresponding heating element.

Description

Multi-channel blower driven by multiple motors alternately and control method thereof Technical Field The invention belongs to the technical field of personal care appliances, and particularly relates to a multi-channel blower driven by multiple motors alternately and a control method thereof. Background In order to meet the requirement of consumers on quick hair drying, the power of the existing household hair dryer is continuously improved, and the power of the main stream product is 1800W-2200W. However, pursuing greater power (e.g., above 3000W) encounters a real bottleneck, namely the 10A socket widely used by ordinary households and hotels, with a maximum carrying power of 2200W (220V 10A). If a high-power blower is forcibly inserted, the socket is easy to overheat, the circuit is tripped, and even a fire disaster is caused. In order to solve the air quantity problem, a double-air-duct blower appears on the market, such as a double-air-duct blower disclosed in Chinese patent CN117179432A, but the design thought is that two air ducts work simultaneously, and although the air quantity is increased, the contradiction between high power and socket compatibility is not solved, and the socket requirement is higher due to total power superposition. In addition, the traditional single-point air-out blower blows the same area for a long time, so that scalp is easy to overheat, and user experience is poor. Therefore, we propose a multi-channel blower with multiple motors driven alternately and a control method thereof, so as to solve the above-mentioned problems. The above information disclosed in this background section is only for enhancement of understanding of the background section of the invention and therefore it may not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention The invention aims to provide a blower which can realize high-power quick hair drying, is safely compatible with a common household 10A socket and can provide surrounding type comfortable hair-blowing experience, and a control method thereof. In order to achieve the above purpose, the invention provides a multi-channel blower with multiple motors alternately driven, comprising: The U-shaped shell is in a U-shaped structure, at least two groups of air outlets are arranged on the inner side of the shell and used for surrounding the head of a user to supply air when the U-shaped shell is in use, and the bottoms of the two ends of the U-shaped shell are respectively provided with a left air inlet and a right air inlet; At least two groups of air duct systems are arranged in the U-shaped shell, and each group of air duct systems comprises a motor and a heating body; The control unit is arranged in the U-shaped shell, is respectively and electrically connected with each group of air duct systems and is used for controlling each group of air duct systems to work alternately; The control unit is configured to conduct only one group of air duct systems at any time and enable the air duct systems of each group to work alternately at a switching frequency of 20Hz to 50Hz, the nominal total power of the whole machine is larger than 2200W, and the instantaneous input power at any time is not larger than 2200W. Preferably, the air outlet comprises a left air outlet and a right air outlet which are respectively arranged at two sides of the U-shaped shell, the air duct system comprises a first air duct system arranged in the left end of the U-shaped shell and a second air duct system arranged in the right end of the U-shaped shell, the first air duct system comprises a first motor and a first heating body, and the second air duct system comprises a second motor and a second heating body. Preferably, the control unit includes: The main control MCU is used for generating a pulse width modulation signal; The zero-crossing detection circuit is connected to the MCU and used for detecting the zero crossing point of alternating current; The first silicon controlled rectifier driving circuit and the second silicon controlled rectifier driving circuit are respectively connected to the MCU and are alternately conducted under the control of the MCU; the first bidirectional thyristor and the second bidirectional thyristor are respectively connected between the first air duct system and the alternating current power supply, and between the second air duct system and the alternating current power supply, and are controlled by corresponding thyristor driving circuits. Preferably, a distance sensor is further disposed at the air outlet of the U-shaped casing, and the distance sensor is electrically connected with the control unit, and is used for detecting the distance between the air outlet and the hair, and the control unit adjusts the switching frequency in real time according to the distance. Preferably, the control unit is configured to: When the distance is smaller than a first threshold value, the switching fr