TWM457782U - Intelligent temperature control DC fan - Google Patents

Description

Intelligent temperature control DC fan

The present invention relates to a fan, and more particularly to an intelligent temperature-controlled DC fan capable of controlling the rotational speed according to temperature.

Referring to FIG. 1 , which is a temperature control fan currently on the market, the temperature control fan includes a fan body 1 and a temperature processing unit 2 connected to the fan body 1 .

The fan body 1 includes a fan motor 11 and a circuit substrate 12 that can drive the fan motor 11 to operate. The circuit substrate 12 has a step-down circuit 121, a microprocessor 122, a driving circuit 123, and a magnetic sensing element 124.

The temperature processing unit 2 is mounted outside the fan body 1 and is connected to the circuit board 12 by a circuit. The temperature detecting unit 2 includes a temperature detecting component 21 that can detect an ambient temperature, and a universal input/output interface ( GPIO) A rotational speed processor 22 coupled to the microprocessor 122.

The temperature-controlled fan detects the temperature of the outside world by using the temperature detecting component 21, and the temperature detecting component 21 generates a temperature signal according to the detected temperature and transmits the temperature signal to the rotational speed processor 22, and the rotational speed processor 22 targets The temperature signal is calculated to obtain a temperature value and then converted into a suitable one. The Pulse Width Modulation signal is then transmitted to the microprocessor 122 of the circuit substrate 12, so that the microprocessor 122 further controls the driving circuit 123 to drive the fan motor 11 according to the pulse width modulation signal. Running.

When the fan motor 11 is in operation, the microprocessor 122 transmits the magnetic induction element 124 to confirm its actual rotational speed, and transmits a rotational speed signal to the rotational speed processor 22, so that the temperature processing unit 2 can confirm the actual operating speed. To meet the expected speed requirements.

However, the signal transmission process and the connection loop of the above mechanism are too complicated, and the temperature processing unit 2 and the fan body 1 are respectively installed at different positions, so that the installation volume is not easily reduced, and the material cost of arranging the lines is not easily reduced. The circuit board 12 is separately disposed from the temperature processing unit 2, and the accuracy of the control RPM (Revolution Per Minute) of the signal transmission is not good, and the signal and the speed are repeatedly converted by the signal, and the precision cannot be accurately To meet the requirements of temperature control speed, it is necessary to improve these defects.

Therefore, the purpose of the present invention is to provide an integrated intelligent temperature-controlled DC fan.

Therefore, the novel intelligent temperature control DC fan comprises: a fan body and a circuit substrate.

The fan body includes a motor. The motor has a stator and a rotor that is rotatable relative to the stator.

The circuit substrate is mounted to the motor and includes a temperature detector The measuring component, a microprocessor connected to the temperature detecting component, and a driving circuit capable of driving the rotor to rotate. The temperature detecting component can detect the outside temperature and correspondingly transmit a temperature signal to the microprocessor. The microprocessor can transmit a corresponding one of the rotational speed commands to the drive circuit according to the temperature signal. The drive circuit can control the rotational speed of the motor according to the rotational speed command.

3‧‧‧Smart temperature-controlled DC fan

4‧‧‧fan body

40‧‧‧Motor

41‧‧‧ Stator

42‧‧‧Rotor

43‧‧‧ Mounting

430‧‧‧ openings

5‧‧‧ circuit board

51‧‧‧Buck circuit

511‧‧‧First conversion circuit

512‧‧‧Second conversion circuit

52‧‧‧ Temperature detecting element

53‧‧‧Microprocessor

54‧‧‧Magnetic sensing elements

55‧‧‧Drive circuit

9‧‧‧External power

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a functional block diagram illustrating a conventional temperature-controlled fan; FIG. 2 is an exploded perspective view showing the present invention. A first preferred embodiment of a novel intelligent temperature-controlled DC fan; FIG. 3 is a functional block diagram illustrating functional blocks of the main components of the preferred embodiment; and FIG. 4 is a comparison table for the preferred embodiment A temperature and speed comparison table of the example; and FIG. 5 is a functional block diagram illustrating the functional blocks of a second preferred embodiment of the novel intelligent temperature-controlled DC fan.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2 and FIG. 3, a first preferred embodiment of the intelligent temperature-controlled DC fan 3 of the present invention is suitable for receiving external power 9 which is always flowing. The operation includes: a fan body 4, and a circuit substrate 5.

The fan body 4 includes a motor 40 and a mount 43 for mounting the motor 40. The motor 40 has a stationary stator 41 and a rotor 42 rotatable relative to the stator 41. The mount 43 has an opening 430.

The circuit board 5 is mounted on the motor 40 and interposed between the stator 41 and the mounting base 43 and includes a step-down circuit 51, a temperature detecting component 52, and a signal connected to the temperature detecting component 52. The microprocessor 53, a magnetic induction element 54 connected to the microprocessor 53, and a drive circuit 55 for driving the rotation of the rotor 42 of the motor 40.

The step-down circuit 51 can convert the external power 9 into a suitable voltage for supply to other components of the circuit substrate 5. The step-down circuit 51 of the preferred embodiment has a function for converting a voltage to the drive circuit 55. The first conversion circuit 511 is operated, and a second conversion circuit 512 for converting the voltage into the temperature detecting component 52 and the microprocessor 53 is operated.

The temperature detecting component 52 is disposed at a position adjacent to the opening 430 and electrically connected to the second converting circuit 512 of the step-down circuit 51, which can measure the temperature of the outside world by using an infrared sensing principle. And correspondingly transmitting a temperature signal to the microprocessor 53, wherein the temperature detecting component 52 is connected to the microprocessor 53 through a two-wire communication bus interface, and the digital signal can be directly used through the interface. (Digital Signal) to transmit data, so it has better transmission accuracy. In the preferred embodiment, an I ² C (Inter-Integrated Circuit) interface is used, but the type of interface in implementation is not limited to I ² C.

The microprocessor 53 is electrically connected to the second conversion circuit 512 of the step-down circuit 51, and generates a corresponding rotation speed command according to the temperature signal and transmits the corresponding rotation speed command to the driving circuit 55. Referring to FIG. 4, the preferred embodiment is implemented. In the example, the microprocessor 53 has a preset Temperature-RPM Conversion Chart built in. In FIG. 4, the horizontal axis of the comparison table represents temperature and the vertical axis represents rotational speed, and different temperature values are respectively Corresponding to a specific speed value and forming a temperature speed corresponding curve, the microprocessor 53 can use the temperature signal and refer to the comparison table to generate a corresponding speed command, and the fan body 4 can operate normally. The curve of the comparison table can be presented in any form within the range of data that can be stored by the microprocessor 53. However, it should be noted that the implementation of the present invention is not limited to setting the comparison table, for example, the microprocessor 53 is also It can be calculated using a pre-set formula to generate the appropriate speed command.

The magnetic sensing element 54 is signally coupled to the microprocessor 53 and is capable of detecting the rotational speed of the rotor 42 of the motor 40 and transmitting the measured actual rotational speed to the microprocessor 53.

The driving circuit 55 is electrically connected to the first converting circuit 511 of the step-down circuit 51. The rotor 42 of the motor 40 can be driven to rotate, and the motor 40 can be controlled according to the rotational speed command to adjust the rotor 42 to increase. The speed of the rotor 42 can be confirmed by detecting the counter electromotive force of each phase. It is necessary to provide the magnetic induction element 54 as described above.

When the present invention is used, the external power 9 is first input into the circuit substrate 5 of the smart temperature-controlled DC fan 3, and then the step-down circuit 51 converts the external power 9 into the temperature detecting component 52, the micro The operating voltage of the processor 53 and the driving circuit 55 is measured by the opening 430 of the mounting seat 43 and the temperature is generated according to the measured temperature and transmitted to the temperature signal. The microprocessor 53 then transmits the rotational speed command to the drive circuit 55 to cause the drive circuit 55 to rotate the rotor 42 of the motor 40 in accordance with the rotational speed command. Therefore, through the microprocessor 53 and the temperature detecting component 52, the function of controlling the fan speed of the closed loop temperature can be completed in the single fan.

Specifically, when the smart temperature-controlled DC fan 3 is used, the external power 9 is first turned on, and the driving circuit 55 can be set to first drive the rotor 42 to rotate at a certain rotational speed, for example, the rotor 42 is 50. % of the speed is operated, then the microprocessor 53 obtains the external temperature data from the temperature detecting component 52, and then reads the corresponding rotational speed data from the built-in temperature rotational speed comparison table, and simultaneously obtains the magnetic sensing element 54 The actual rotational speed of the motor 40, and then the microprocessor 53 compares the obtained rotational speed data with the actual rotational speed. If the two are equal, the drive circuit 55 maintains the motor 40 at the same rotational speed, if the rotational speed data is greater than / Below the actual speed, the microprocessor 53 generates a corresponding rotational speed command to the drive circuit 55, so that the drive circuit 55 can increase/decrease the rotational speed of the rotor 42. In actual operation, the microprocessor 53 can continuously compare the rotational speed data corresponding to the temperature data with the actual rotational speed, and continuously issue a rotational speed command to the drive. The circuit 55 is driven to achieve the purpose of dynamically controlling the speed of the closed loop speed control.

In addition, the mount may further be provided with a transparent barrier (not shown) that closes the opening, and the transparent barrier is generally made of glass, thermoplastic (ABS), polyamide (TR55=PA), polycarbonate. It is made of ester (PC) or polymethyl methacrylate (acrylic) material and its thickness can be between 0.1mm~30mm, but the structure of the implementation is not limited to this. The transparent barrier can accommodate Infrared penetration, and it has the characteristics of blocking foreign matter and moisture, can be used to avoid the phenomenon that the airflow and the dusty material are interlaced to block the opening, and the temperature detecting component 52 is prevented from being disturbed by the temperature and the accuracy is lost. .

Since the temperature detecting component 52 is integrated on the circuit substrate 5, the volume of the smart temperature-controlled DC fan 3 can be reduced, and the material cost required for wiring can be reduced, and the debugging time of the circuit design stage can be adjusted. The function of controlling the speed of the closed loop temperature can be achieved in the single fan, and the temperature signal is directly output to the microprocessor 53 through the digital signal, so that the microprocessor 53 can immediately generate the speed command. The mechanism has also improved the shortcomings of the previous temperature-controlled fan due to the complicated loop, which caused the control speed error to be too large. On the other hand, the temperature detecting component 52 detects infrared temperature through the opening 430, and does not use the contact type to detect the temperature, thereby extending the service life and expanding the detection range.

In addition, during operation of the motor 40, the microprocessor 53 can also perform lock detection, and output a rotational speed signal corresponding to the rotor 42 and a fan lock corresponding to when the fan is locked. The signal is sent outside the circuit board 5, for example, if the motor 40 is measured to have a rotational speed of zero, then The microprocessor 53 outputs the fan lock signal. If the motor 40 is operated at a certain rotational speed, the microprocessor 53 outputs the rotational speed signal. In addition, the microprocessor 53 can also communicate with the temperature detecting component 52 to output the temperature signal corresponding to the external temperature through the communication bus interface. By outputting the various signals described above, the external electronic device matched with the intelligent temperature-controlled DC fan 3 of the present invention can directly obtain the required information, and does not need to perform monitoring, diagnosis, and the like from external components, thereby improving transmission communication. Accuracy and immediacy.

Referring to FIG. 5, a second preferred embodiment of the smart temperature-controlled DC fan 3 of the present invention is different from the foregoing first preferred embodiment in that the step-down circuit 51 has only the second The conversion circuit 512 operates by directly receiving the external power 9.

In the preferred embodiment, the temperature detecting component 52 is disposed on the circuit substrate 5 and connected to the microprocessor 53 except that the driving circuit 55 does not directly pass the external circuit via the step-down circuit 51. The power supply 9 is used as a power source. The preferred embodiment shows that the step-down circuit 51 can be flexibly adjusted according to the power requirement of each component, and is not limited to the first preferred embodiment, for example, when implemented. The step-down circuit 51 may be disposed outside the circuit substrate 5, or the external power 9 may directly supply a suitable voltage to the circuit substrate 5.

In summary, the intelligent temperature-controlled DC fan 3 of the present invention is not limited in the first or second preferred embodiment by integrating the temperature detecting component 52 on the circuit substrate 5 in structure. Product volume, reduced material cost, and improved temperature-controlled speed accuracy The accuracy and immediacy of the information transmitted by the external electronic device, so the novel can complete the function of the closed loop temperature control fan speed in the single fan, which is a pioneer of the industry, so it can achieve the purpose of this creation.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

3‧‧‧Smart temperature-controlled DC fan

40‧‧‧Motor

5‧‧‧ circuit board

51‧‧‧Buck circuit

511‧‧‧First conversion circuit

512‧‧‧Second conversion circuit

52‧‧‧ Temperature detecting element

53‧‧‧Microprocessor

54‧‧‧Magnetic sensing elements

55‧‧‧Drive circuit

9‧‧‧External power

Claims (10)

An intelligent temperature-controlled DC fan comprising: a fan body including a motor, the motor having a stator, and a rotor rotatable relative to the stator; and a circuit substrate mounted to the motor and including a temperature detector a measuring component, a microprocessor connected to the temperature detecting component, and a driving circuit capable of driving the rotor to rotate, the temperature detecting component detecting an external temperature and correspondingly transmitting a temperature signal to the microprocessor. The microprocessor can transmit a corresponding rotational speed command to the driving circuit according to the temperature signal, and the driving circuit can control the rotational speed of the motor according to the rotational speed command. The smart temperature-controlled DC fan of claim 1, wherein the circuit substrate further comprises a magnetic sensing element connected to the microprocessor and configured to detect the rotational speed of the rotor. The smart temperature-controlled DC fan of claim 1, wherein the fan body further comprises a mounting seat for the motor, the mounting seat having an opening for the temperature detecting component to detect an outside temperature . The intelligent temperature-controlled DC fan of claim 3, wherein the mount further has a transparent barrier that closes the opening. The smart temperature-controlled DC fan according to claim 1, wherein the temperature detecting component detects the outside temperature by using infrared rays. The intelligent temperature-controlled DC fan according to claim 1, wherein the circuit substrate further comprises a step-down circuit for converting external power into a suitable voltage, the step-down circuit having a function for converting the voltage to the drive. The first conversion circuit of the circuit. The smart temperature-controlled DC fan of claim 6, wherein the step-down circuit further has a second conversion circuit for converting the voltage into the temperature detecting component and the microprocessor. The smart temperature-controlled DC fan of claim 1, wherein the microprocessor can output a speed signal. The smart temperature-controlled DC fan of claim 1, wherein the microprocessor outputs a fan lock signal corresponding to when the fan is locked. The smart temperature-controlled DC fan of claim 1, wherein the microprocessor can also cooperate with the temperature detecting component to output the temperature signal.