CN205173019U - Centralized double fan control system - Google Patents
Centralized double fan control system Download PDFInfo
- Publication number
- CN205173019U CN205173019U CN201520817519.9U CN201520817519U CN205173019U CN 205173019 U CN205173019 U CN 205173019U CN 201520817519 U CN201520817519 U CN 201520817519U CN 205173019 U CN205173019 U CN 205173019U
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- Prior art keywords
- built
- fans
- centralized
- control
- fan
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Abstract
The utility model discloses a centralized double fan control system, it includes main control board and drive plate, and wherein, the drive plate is connected with first built -in direct current fan and the built -in direct current fan of second respectively, is equipped with control chip and rotational speed in the drive plate and catches control circuit, is equipped with the rotational speed among the control chip and catches control module, and the rotational speed is caught control circuit and is connected with rotational speed capturing module. The utility model discloses can reduce harmonic interference and other electron radiations that external electric wire netting produced, save the high -pressure electrolytic capacitor that the main control board was reserved for two built -in direct current fans, can realize the two built -in direct current fans of independent control, realize the infinitely variable control of rotational speed.
Description
Technical field
The utility model relates to blower fan control system, is specifically related to a kind of control system of the centralized two fans for air-conditioner set.
Background technique
The built-in DC fan of current business air conditioner unit is all powered by master control borad, control, as shown in Figure 1, this control mode topology is simple, but have a strong impact on complete machine Harmonics of Input component, complete machine stress_responsive genes is easily caused to exceed standard, in addition, master control borad often needs a special high-voltage electrolytic capacitor to be that two built-in DC fan is powered.
Model utility content
A kind of centralized two fans control system and controlling method are provided in the utility model embodiment, exceed standard to solve air-conditioner set stress_responsive genes in prior art and need extra electrochemical capacitor to carry out the problem of powering.
For achieving the above object, the utility model provides a kind of centralized two fans control system, it comprises master control borad and driving plate, wherein, driving plate respectively DC fan built-in with first and the second built-in DC fan is connected, be provided with control chip in driving plate and rotating speed catches control circuit, be provided with rotating speed acquisition control module in control chip, rotating speed is caught control circuit and is connected with rotating speed trapping module.
As preferably, in driving plate, be also provided with power-factor correction module.
As preferably, master control borad is connected with alternating current input power supplying.
As preferably, driving plate is the first built-in DC fan and the second built-in DC fan by its inner DC bus.
As preferably, master control borad is provided with the rotating speed interface of corresponding two built-in DC fans respectively.
As preferably, rotating speed is caught control circuit and is had first input end, the second input end and the 3rd input end.
As preferably, first input end, the second input end and the 3rd input end input the speed feedback signal of the first built-in DC fan, the speed feedback signal of the second built-in DC fan and feedback upset control signal respectively.
As preferably, first input end is connected with the anode of the first diode with the collector electrode of the first switching transistor, the grounded-emitter connection of the first switching transistor; Second input end is connected with the anode of the second diode, 3rd input end is connected with the base stage of the 3rd switching transistor with the base stage of the first switching transistor by the first resistance, the negative electrode of the first diode is all connected with control chip with the negative electrode of the second diode, the collector electrode of the 3rd switching transistor is connected with the second resistor with the base stage of second switch transistor, second resistor is connected with 3.3V power supply, the grounded-emitter connection of the 3rd switching transistor and second switch transistor, the collector electrode of second switch transistor is connected with the anode of the second diode.
The centralized two fans control system that the utility model relates to can reduce humorous wave interference and other electron radiations of the generation of extraneous electrical network, saving master control borad is the high-voltage electrolytic capacitor that two built-in DC fan is reserved, the two built-in DC fan of independent control can be realized, realize the step-less adjustment of rotating speed.
Accompanying drawing explanation
Fig. 1 is the control schematic diagram of two built-in DC fan in prior art;
Fig. 2 is the structural representation of the centralized two fans control system that the utility model relates to;
Fig. 3 is the schematic diagram of the centralized two fans control system medium speed capture circuit that the utility model relates to.
Description of reference numerals: 1, master control borad; 2, driving plate; 3, compressor; 4, power factor correction module.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
As shown in Figure 2, Fig. 2 shows a kind of centralized two fans control system, it is mainly used in air-conditioner set, comprise master control borad 1 and driving plate 2, wherein, master control borad 1 is connected with extraneous alternating current input power supplying, and driving plate 2 respectively DC fan (not shown) built-in with first and the second built-in DC fan (not shown) is connected and is that two built-in DC fans are powered by its inner DC bus.In addition, in order to drive the operation of compression member in air-conditioner set, driving plate 2 is also connected with compressor 3.The driving force of driving plate 2 is strong, connected two built-in DC fans as load are very little for the impact of driving plate 2, and control for two built-in DC fans relative to of the prior art by master control borad, the electrochemical capacitor that need not increase high pressure again can meet driving requirement.In addition, master control borad 1 is provided with the rotating speed interface of corresponding two built-in DC fans respectively, the instruction rotating speed that master control borad 1 only need calculate two built-in DC fans according to system logic sends to driving plate 2 by rotating speed interface, the operation of two built-in DC fans is controlled by driving plate 2, the control of two built-in DC fans is completely independently independent of each other, realize real free-standing two fans control mode, meet the air quantity requirement of electrodeless formula system.
Power-factor correction module 4 and control chip (not shown) is provided with in driving plate 2, for power-factor correction module 4, because two built-in DC fans pass through the DC bus powered of driving plate 2, power-factor correction module can by the harmonic wave interference filtering of extraneous electrical network, significantly reduce humorous wave interference and other electron radiations that two built-in DC fans produce to external world, realize whole air-conditioner set without harmonic excess.Control chip is main controlling component, wherein be provided with rotating speed acquisition control module, rotating speed acquisition control module can monitor the rotating speed of two built-in DC fans simultaneously, in driving plate 2, be also provided with rotating speed catch control circuit, rotating speed is caught control circuit and is connected with rotating speed trapping module, realizes independently controlling the rotating speed of two built-in DC fans like this by rotating speed capture circuit and rotating speed capture circuit.
Rotating speed catches the circuit diagram of control circuit see accompanying drawing 3, can find out that rotating speed is caught control circuit and had first input end, the second input end and the 3rd input end in figure 3, input the speed feedback signal of the first built-in DC fan, the speed feedback signal of the second built-in DC fan and feedback upset control signal respectively, first input end is connected with the anode of the first diode D1 with the collector electrode of the first switching transistor Q1, the grounded-emitter connection of the first switching transistor Q1, second input end is connected with the anode of the second diode D2, 3rd input end is connected with the base stage of the 3rd switching transistor Q3 with the base stage of the first switching transistor Q1 by the first resistance R1, the negative electrode of the first diode D1 is all connected with control chip with the negative electrode of the second diode D2, the collector electrode of the 3rd switching transistor Q3 is connected with the second resistor R2 with the base stage of second switch transistor Q2, second resistor R2 is connected with 3.3V power supply, the grounded-emitter connection of the 3rd switching transistor Q3 and second switch transistor Q2, the collector electrode of second switch transistor Q2 is connected with the anode of the second diode D2.
This rotating speed catches control circuit can make to only have a signal can be transferred into rotating speed trapping module in the speed feedback signal of the speed feedback signal of each moment first built-in DC fan and the second built-in DC fan, and concrete controlling method is as follows:
(1) make feedback overturn control signal to set to 0, now the first switching transistor Q1 not conducting, the speed feedback signal of the first built-in DC fan is delivered to the rotating speed trapping module of control chip via the first diode D1; Because feedback upset control signal is set to 0, now the 3rd switching transistor Q3 not conducting, second switch transistor Q2 base stage is 1, then second switch transistor Q2 conducting, the speed feedback signal of the second built-in DC fan via second switch transistor Q2 collector electrode-emitter to ground, signal conductively-closed, the speed feedback signal realizing the first built-in DC fan is sent in the rotating speed trapping module of chip.
(2) make feedback overturn control signal and put 1, now the first switching transistor Q1 conducting, the speed feedback signal of the first built-in DC fan via first switching transistor Q1 collector electrode-emitter to ground, the speed feedback signal conductively-closed of the first built-in DC fan; Because feedback upset control signal puts 1, now the 3rd switching transistor Q3 conducting, then the base radio pressure of second switch transistor Q2 will be clamped at the Vce voltage of the 3rd switching transistor Q3, by choosing the first resistance R1, the value of the second resistance R2 when making the 3rd switching transistor Q3 conducting the degree of depth saturated, then Vce voltage is within 0.6V, then second switch transistor Q2 not conducting, the speed feedback signal of the second built-in DC fan is delivered in the rotating speed trapping module of control chip via the second diode D2.
Like this, realizing any time only has the speed feedback signal of a built-in DC fan to be delivered in the rotating speed trapping module of control chip, thus realize to two built-in DC fans independently rotating speed control.
Embodiment of the present utility model is only the description carried out preferred implementation of the present utility model; not the utility model design and scope are limited; under the prerequisite not departing from the utility model design philosophy; the various modification that in related domain, engineers and technicians make the technical solution of the utility model and improvement; protection domain of the present utility model all should be fallen into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (9)
1. a centralized two fans control system, it comprises master control borad (1) and driving plate (2), wherein, described driving plate (2) respectively DC fan built-in with first and the second built-in DC fan is connected, it is characterized in that, be provided with control chip in described driving plate (2) and rotating speed catches control circuit, be provided with rotating speed acquisition control module in described control chip, described rotating speed is caught control circuit and is connected with described rotating speed trapping module.
2. centralized two fans control system according to claim 1, is characterized in that, is also provided with power-factor correction module (4) in described driving plate (2).
3. centralized two fans control system according to claim 2, is characterized in that, described master control borad (1) is connected with alternating current input power supplying.
4. centralized two fans control system according to claim 3, is characterized in that, described driving plate (2) is described first built-in DC fan and described second built-in DC fan by its inner DC bus.
5. centralized two fans control system according to claim 4, is characterized in that, described master control borad (1) is provided with the rotating speed interface of corresponding two built-in DC fans respectively.
6. the centralized two fans control system according to any one of claim 1-5, is characterized in that, described rotating speed is caught control circuit and had first input end, the second input end and the 3rd input end.
7. centralized two fans control system according to claim 6, it is characterized in that, described first input end, described second input end and described 3rd input end input the speed feedback signal of described first built-in DC fan, the speed feedback signal of described second built-in DC fan and feedback upset control signal respectively.
8. centralized two fans control system according to claim 7, it is characterized in that, described first input end is connected with the anode of the first diode (D1) with the collector electrode of the first switching transistor (Q1), the grounded-emitter connection of described first switching transistor (Q1), described second input end is connected with the anode of the second diode (D2), described 3rd input end is connected with the base stage of the 3rd switching transistor (Q3) with the base stage of described first switching transistor (Q1) by the first resistance (R1), the negative electrode of described first diode (D1) is all connected with described control chip with the negative electrode of described second diode (D2), the described collector electrode of the 3rd switching transistor (Q3) is connected with the second resistor (R2) with the base stage of second switch transistor (Q2), described second resistor (R2) is connected with 3.3V power supply, the grounded-emitter connection of described 3rd switching transistor (Q3) and described second switch transistor (Q2), the collector electrode of described second switch transistor (Q2) is connected with the anode of described second diode (D2).
9. the centralized two fans control system according to claim 7 or 8, is characterized in that, described driving plate (2) is also connected with compressor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520817519.9U CN205173019U (en) | 2015-10-19 | 2015-10-19 | Centralized double fan control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520817519.9U CN205173019U (en) | 2015-10-19 | 2015-10-19 | Centralized double fan control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205173019U true CN205173019U (en) | 2016-04-20 |
Family
ID=55737021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520817519.9U Withdrawn - After Issue CN205173019U (en) | 2015-10-19 | 2015-10-19 | Centralized double fan control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205173019U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257576A (en) * | 2015-10-19 | 2016-01-20 | 珠海格力电器股份有限公司 | Centralized control system and method for double draught fans |
| CN112761999A (en) * | 2021-01-12 | 2021-05-07 | 珠海拓芯科技有限公司 | Double-fan control circuit and air conditioner |
| CN112947170A (en) * | 2021-02-02 | 2021-06-11 | 珠海拓芯科技有限公司 | Double-fan control circuit and air conditioner |
-
2015
- 2015-10-19 CN CN201520817519.9U patent/CN205173019U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257576A (en) * | 2015-10-19 | 2016-01-20 | 珠海格力电器股份有限公司 | Centralized control system and method for double draught fans |
| CN112761999A (en) * | 2021-01-12 | 2021-05-07 | 珠海拓芯科技有限公司 | Double-fan control circuit and air conditioner |
| CN112761999B (en) * | 2021-01-12 | 2022-10-28 | 珠海拓芯科技有限公司 | Double-fan control circuit and air conditioner |
| CN112947170A (en) * | 2021-02-02 | 2021-06-11 | 珠海拓芯科技有限公司 | Double-fan control circuit and air conditioner |
| CN112947170B (en) * | 2021-02-02 | 2024-04-12 | 宁波奥克斯电气股份有限公司 | Double-fan control circuit and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160420 Effective date of abandoning: 20170721 |