CN207349153U - Cooking machine radiating circuit and cooking machine - Google Patents
Cooking machine radiating circuit and cooking machine Download PDFInfo
- Publication number
- CN207349153U CN207349153U CN201721318893.XU CN201721318893U CN207349153U CN 207349153 U CN207349153 U CN 207349153U CN 201721318893 U CN201721318893 U CN 201721318893U CN 207349153 U CN207349153 U CN 207349153U
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- cooking machine
- switch element
- radiating circuit
- fan
- utility
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Abstract
The utility model provides a kind of cooking machine radiating circuit and cooking machine.Cooking machine radiating circuit includes：Pwm signal input terminal, first resistor, second resistance, switch element and fan electromotor, the first end of the fan electromotor is connected with power positive end, the second end of the fan electromotor is connected with the first end of the switch element, the second end ground connection of the switch element, the control terminal of the switch element is connected by the first resistor with the pwm signal input terminal, and the control terminal of the switch element is grounded by the second resistance.The utility model solves the problems, such as traditional heat-dissipating method since rotation speed of the fan is unadjustable, noise is big.
Description
Technical field
Cooking machine field is the utility model is related to, more particularly to a kind of cooking machine radiating circuit and cooking machine.
Background technology
At present, family expenses cooking machine or Domestic fruit juice extractor, are generally controlled using brushed DC motor, due to there is brush electricity
Electromechanical brush has the deficiencies of service life is short, and noise is big and has spark, and efficiency is low, and running frequency immobilizes, and has brush electricity
Machine is gradually substituted by brushless electric machine.And permanent-magnet brushless DC electric machine has efficiency high, brushless and running frequency can
Become so as to a variety of advantages such as energy saving, be widely used in the multiple fields such as household electrical appliances, weaving, medical treatment, automobile, new energy.
Family expenses cooking machine, when being controlled using brshless DC motor, using the 6 IGBT or IPM of integrated 6 IGBT
Direct current is become the alternating current of changeable frequency, controls the operation of brshless DC motor by module as inverter.As motor is transported
Extension IGBT or IPM the inside modules temperature of the increasing of row electric current either run time can gradually rise, only by IGBT/IPM
Heat sink cannot reduce the inside modules temperature of IGBT/IPM well, it is necessary to plus fan radiate to IGBT/IPM.Tradition
Heat dissipating method be connection and the coaxial fan blade of machine shaft, when motor rotates, fan blade with rotation, to
Solve the problems, such as that IGBT or IPM internal temperatures rise.
But due to the non-constant width of the brshless DC motor range of speeds, when motor speed is low, rotation speed of the fan is slow, does not have
Cooling effect, when motor speed is high, rotation speed of the fan is high, and can significantly increase noise, particularly, when direct current generator stops
During operating, since inside modules temperature may be very high, it is necessary to continue to radiate, since brshless DC motor shuts down, therewith together
The cooling wind blade of axis connection cannot continue to module heat dissipating, cause corresponding technical problem.
Utility model content
The utility model provides a kind of cooking machine radiating circuit and cooking machine, and to solve in the prior art, rotation speed of the fan is not
Adjustable, the problem of noise is big.
To solve the above problems, the one side as the utility model, there is provided a kind of cooking machine radiating circuit, bag
Include：Pwm signal input terminal, first resistor, second resistance, switch element and fan electromotor, the first end of the fan electromotor with
Power positive end connects, and the second end of the fan electromotor is connected with the first end of the switch element, the switch element
Second end is grounded, and the control terminal of the switch element is connected by the first resistor with the pwm signal input terminal, and described
The control terminal of switch element is grounded by the second resistance.
Preferably, the switch element is p-type mosfet transistor or IGBT or silicon-controlled.
The utility model additionally provides a kind of cooking machine, including above-mentioned cooking machine radiating circuit.
The utility model solves the problems, such as traditional heat-dissipating method since rotation speed of the fan is unadjustable, noise is big.
Brief description of the drawings
Fig. 1 schematically shows the structure diagram of the utility model.
Reference numeral in figure：1st, pwm signal input terminal；2nd, first resistor；3rd, second resistance；4th, switch element；5th, fan
Motor.
Embodiment
The embodiment of the utility model is described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
The one side of the utility model, there is provided a kind of cooking machine radiating circuit, including：Pwm signal input terminal 1,
One resistance 2, second resistance 3, switch element 4 and fan electromotor 5, first end and the power positive end VCC of the fan electromotor 5 connect
Connect, the second end of the fan electromotor 5 is connected with the first end of the switch element 4, the second termination of the switch element 4
Ground, the control terminal of the switch element 4 is connected by the first resistor 2 with the pwm signal input terminal 1, and the switch
The control terminal of element 4 is grounded by the second resistance 3.Preferably, the switch element for p-type mosfet transistor or
IGBT or silicon-controlled.
By adopting the above-described technical solution, the utility model can be inputted pwm control signal by pwm signal input terminal 1
To the control terminal of switch element 4 so that the on and off of controlling switch element 4, with by exterior pwm signal come change into
Enter the size of the equivalent voltage at 5 both ends of fan electromotor, so as to control the rotating speed of fan electromotor 5, realize to IGBT or IPM modules
The purpose of heat dissipation, avoids module from overheating, and realizes the overheat protector to module, solves traditional heat-dissipating method due to rotation speed of the fan not
Adjustable, the problem of noise is big, additionally it is possible to overcome using radiating fan blade and brshless DC motor it is coaxially connected bring it is low
Rotating speed heat dissipation deficiency, the high noisy problem that fan blade rotating speed height is brought during high rotating speed.
Furthermore, it is possible to when brshless DC motor shuts down, due to IGBT/IMP inside modules temperature it is also very high, it is necessary to
Further heat dissipation, main control MCU can continue to control F_PWM ripple duty cycles, and control cooling fan remains in operation, continues to dissipate module
The good result of heat, when the traditional control method brshless DC motor mentioned with solving technical background shuts down, it is impossible to continue
To the technical problem of module heat dissipating.
The utility model additionally provides a kind of cooking machine, including above-mentioned cooking machine radiating circuit.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (3)
- A kind of 1. cooking machine radiating circuit, it is characterised in that including：Pwm signal input terminal (1), first resistor (2), the second electricity Resistance (3), switch element (4) and fan electromotor (5), the first end of the fan electromotor (5) are connected with power positive end, the wind The second end of fan motor (5) is connected with the first end of the switch element (4), the second end ground connection of the switch element (4), institute The control terminal for stating switch element (4) is connected by the first resistor (2) with the pwm signal input terminal (1), and the switch The control terminal of element (4) is grounded by the second resistance (3).
- 2. cooking machine radiating circuit according to claim 1, it is characterised in that the switch element is brilliant for p-type MOSFET Body pipe or IGBT or silicon-controlled.
- 3. a kind of cooking machine, it is characterised in that including the cooking machine radiating circuit described in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721318893.XU CN207349153U (en) | 2017-10-13 | 2017-10-13 | Cooking machine radiating circuit and cooking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721318893.XU CN207349153U (en) | 2017-10-13 | 2017-10-13 | Cooking machine radiating circuit and cooking machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207349153U true CN207349153U (en) | 2018-05-11 |
Family
ID=62358069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721318893.XU Active CN207349153U (en) | 2017-10-13 | 2017-10-13 | Cooking machine radiating circuit and cooking machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207349153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108836111A (en) * | 2018-06-26 | 2018-11-20 | 佛山市晨洲电气有限公司 | A kind of reliable electric kettle |
-
2017
- 2017-10-13 CN CN201721318893.XU patent/CN207349153U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108836111A (en) * | 2018-06-26 | 2018-11-20 | 佛山市晨洲电气有限公司 | A kind of reliable electric kettle |
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