CN204388466U - Air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system - Google Patents
Air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system Download PDFInfo
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- CN204388466U CN204388466U CN201520016572.9U CN201520016572U CN204388466U CN 204388466 U CN204388466 U CN 204388466U CN 201520016572 U CN201520016572 U CN 201520016572U CN 204388466 U CN204388466 U CN 204388466U
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- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005057 refrigeration Methods 0.000 description 14
- 238000001704 evaporation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system, it is characterized in that System's composition comprises: compartment temperature acquisition module, according to the output frequency of the side-play amount determination frequency variation signal PWM3 of each compartment temperature and design temperature; Frequency variation signal output circuit amplifies, the PWM3 that single-chip microcomputer sends for controlling the rotating speed of frequency-changeable compressor; DC fan control circuit comprises drive circuit and feedback circuit, and the PWM3 signal that single-chip microcomputer sends exports direct voltage drive fan through commutating circuit; The square-wave signal of DC fan feedback is judged the motor speed of DC fan by detecting square wave signal frequency by single-chip microcomputer.The utility model for the demand of different refrigerating capacity while frequency-changeable compressor carries out cold Drazin inverse, the rotating speed of adjustment DC fan motor, the cold of the rotating speed of DC fan motor and frequency-changeable compressor is exported match, maintain the scope that evaporator temperature is in setting, the operating efficiency of evaporimeter is not fully exerted.
Description
Technical field
The utility model relates to a kind of control system of refrigeration plant, particularly relates to a kind of air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system.
Background technology
In prior art, in air-cooled variable frequency refrigerator control system, control law for fan is start-stop according to compressor and fixed rotating speed switch, traditional frequency-changing wind-cooling refrigerator is between different during room demand refrigeration, general adjustment compressor is that frequency realizes different cold output to meet different refrigeration demand, and fan electromotor operates with fixing rotating speed, the rotating speed of fan electromotor does not adjust according to refrigeration requirement change, thus causes systematic function can not reach Optimum Matching effect.
Utility model content
The utility model is the weak point for avoiding existing for above-mentioned prior art, provides a kind of air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system, makes systematic function can reach Optimum Matching effect.
The utility model is that technical solution problem adopts following technical scheme:
The feature of the utility model air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system is that its System's composition comprises:
Compartment temperature acquisition module is respectively arranged with temperature sensor in refrigerator each room, and the side-play amount according to each compartment temperature and design temperature determines the output frequency of PWM3 signal and PWM6 signal;
Frequency variation signal output circuit is that the PWM3 signal sent by single-chip microcomputer by triode Q3 amplifies, for controlling the rotating speed of frequency-changeable compressor;
DC fan control circuit, it comprises drive circuit and feedback circuit, and the LC commutating circuit that the PWM6 signal that single-chip microcomputer sends is formed via inductance L 3 and electric capacity C8 after pliotron Q28 amplifies again exports direct voltage drive fan; The dutycycle that described DC fan feeds back is identical but the square-wave signal that frequency is different passes through FB terminal, again through filtering and the voltage-stabiliser tube ZD1 voltage stabilizing output of electric capacity C10, by described single-chip microcomputer by detecting the motor speed of square wave signal frequency judgement DC fan.
Compared with the prior art, the utility model beneficial effect is embodied in:
The utility model is exported with the refrigerating capacity of frequency-changeable compressor by the rotating speed of DC fan motor to mate, and the evaporating temperature maintaining evaporimeter, in the scope of setting, effectively can promote frequency conversion press refrigerating efficiency, and reach energy-conservation effect.
Accompanying drawing explanation
Fig. 1 is Single-chip Controlling and temperature collect module circuit in the utility model, comprises single-chip minimum system, temperature collection circuit and A/D converter circuit
Fig. 2 is temperature collection circuit schematic diagram in the utility model;
Fig. 3 is frequency variation signal output circuit schematic diagram in the utility model;
Fig. 4 is DC fan motor control circuit schematic diagram in the utility model;
Detailed description of the invention
See Fig. 1, Fig. 2, in the present embodiment for each room set temperature sensor respectively, each room comprises temperature-changing chamber, freezing defrost room, refrigerating chamber and refrigerating chamber etc.The NTC thermistor of each compartment temperature sensor is along with the change display different resistance values of temperature, introduced by CN11 and be converted into the voltage between 0 ~ 5V by bleeder circuit, compartment temperature detected value can be obtained according to the temperature of NTC thermistor and the resistance table of comparisons after single-chip microcomputer samples magnitude of voltage, the side-play amount of foundation compartment temperature detected value and design temperature determines the output frequency of PWM3 signal and PWM6 signal, the rotating speed of adjustment frequency-changeable compressor.
Figure 3 shows that frequency variation signal output circuit in the present embodiment, the PWM3 signal that single-chip microcomputer sends by triode Q3 amplifies, and exports in CN9, for controlling the rotating speed of frequency conversion press.
Figure 4 shows that DC fan control circuit in the present embodiment, comprise drive circuit and feedback circuit.The LC commutating circuit that the PWM6 signal that single-chip microcomputer sends is formed via inductance L 3 and electric capacity C8 after pliotron Q28 amplifies again exports direct voltage drive fan.The larger driving voltage of PWM6 signal dutyfactor is higher, and rotation speed of the fan is higher, otherwise lower.Identical but the square-wave signal that frequency is different of dutycycle of DC fan feedback by FB terminal, export through the filtering of electric capacity C10 and voltage-stabiliser tube ZD1 voltage stabilizing, is judged the motor speed of current DC fan by detection square wave signal frequency by single-chip microcomputer.
In the present embodiment, air-cooled variable frequency refrigerator rotation speed of fan self-adapting regulation method is the demand for different refrigerating capacity, while frequency-changeable compressor carries out refrigerating capacity Drazin inverse, adjustment DC fan motor rotating speed, DC fan motor rotating speed and frequency-changeable compressor cold are exported match, maintain the scope of evaporating temperature in setting of evaporimeter.Adjustment for DC fan motor rotating speed utilizes the feedback signal of DC fan motor rotating speed to realize adjustment automatically.
In concrete enforcement, setting evaporimeter optimum working temperature scope, under different compressors rotating speed, by adjusting the closed-loop control of different fan motor rotational speed formation evaporating temperatures, founding mathematical models r
fan=F (r
cmp, T
zf), wherein evaporating temperature T
zffor constant, compressor rotary speed r
cmpfor variable, refrigeration for refrigerator demand F is transformable constant, Mathematical Modeling is embedded in control chip, utilize control chip automatic decision compressor rotary speed, calculate fan motor rotational speed, then judge whether its temperature is in optimum working temperature scope, feeds back to control chip by detecting evaporator temperature sensor, form complete closed-loop system, realize self-adaptative adjustment.
In concrete enforcement; refrigerator master control borad collects real time temperature by each compartment temperature sensor of refrigerator and compares with the turn-on temperature point preset and shutdown temperature point; judge the refrigeration demand of each room; suitable frequency conversion press driving frequency and DC fan motor voltage is exported according to different refrigeration demand; control compressor with this and export different refrigerating capacitys and DC fan motor exports different rotating speeds, such as:
Only have refrigerating chamber to need refrigeration when master control borad detects, when refrigeration for refrigerator demand is F1, the rotating speed that master control borad controls frequency-changeable compressor is
then for the DC fan motor rotating speed that DC fan motor output voltage is corresponding should be
When master control borad has detected that refrigerating chamber and temperature-changing chamber need refrigeration, when refrigeration for refrigerator demand is F2, the rotating speed that master control borad controls frequency-changeable compressor is
then for the DC fan motor rotating speed that DC fan motor output voltage is corresponding should be
When master control borad has detected that refrigerating chamber, temperature-changing chamber and refrigerating chamber need refrigeration, when refrigeration for refrigerator demand is F3, the rotating speed that master control borad controls frequency-changeable compressor is
then for the corresponding DC fan motor rotating speed of DC fan motor output voltage should be
Under master control borad detects quick-frozen pattern, when refrigeration for refrigerator demand is F4, the rotating speed that master control borad controls frequency-changeable compressor is
then for the DC fan motor rotating speed that DC fan motor output voltage is corresponding should be
Claims (1)
1. an air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system, is characterized in that System's composition comprises:
Compartment temperature acquisition module is respectively arranged with temperature sensor in refrigerator each room, and the side-play amount according to each compartment temperature and design temperature determines the output frequency of PWM3 signal and PWM6 signal;
Frequency variation signal output circuit is that the PWM3 signal sent by single-chip microcomputer by triode Q3 amplifies, for controlling the rotating speed of frequency-changeable compressor;
DC fan control circuit, it comprises drive circuit and feedback circuit, and the LC commutating circuit that the PWM6 signal that single-chip microcomputer sends is formed via inductance L 3 and electric capacity C8 after pliotron Q28 amplifies again exports direct voltage drive fan; The dutycycle that described DC fan feeds back is identical but the square-wave signal that frequency is different passes through FB terminal, again through filtering and the voltage-stabiliser tube ZD1 voltage stabilizing output of electric capacity C10, by described single-chip microcomputer by detecting the motor speed of square wave signal frequency judgement DC fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520016572.9U CN204388466U (en) | 2015-01-09 | 2015-01-09 | Air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520016572.9U CN204388466U (en) | 2015-01-09 | 2015-01-09 | Air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system |
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| Publication Number | Publication Date |
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| CN204388466U true CN204388466U (en) | 2015-06-10 |
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| CN201520016572.9U Active CN204388466U (en) | 2015-01-09 | 2015-01-09 | Air-cooled variable frequency refrigerator rotation speed of fan self-adapted adjustment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534809A (en) * | 2015-01-09 | 2015-04-22 | 合肥美菱股份有限公司 | Self-adaptive adjusting system and adjusting method for rotating speed of air-cooled variable frequency refrigerator fan |
| CN111238152A (en) * | 2020-02-05 | 2020-06-05 | 广东奥马冰箱有限公司 | Fan control method and controller based on working coefficient of fixed-frequency press |
-
2015
- 2015-01-09 CN CN201520016572.9U patent/CN204388466U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534809A (en) * | 2015-01-09 | 2015-04-22 | 合肥美菱股份有限公司 | Self-adaptive adjusting system and adjusting method for rotating speed of air-cooled variable frequency refrigerator fan |
| CN111238152A (en) * | 2020-02-05 | 2020-06-05 | 广东奥马冰箱有限公司 | Fan control method and controller based on working coefficient of fixed-frequency press |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 230601 No. 2163 Lianhua Road, Hefei economic and Technological Development Zone, Anhui Patentee after: Changhong MeiLing Limited by Share Ltd Address before: 230061 No. 2163 Lianhua Road, Hefei economic and Technological Development Zone, Anhui Patentee before: Hefei Meiling Co., Ltd. |