CN1563864A - Conversion refrigerator - Google Patents
Conversion refrigerator Download PDFInfo
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- CN1563864A CN1563864A CN 200410023870 CN200410023870A CN1563864A CN 1563864 A CN1563864 A CN 1563864A CN 200410023870 CN200410023870 CN 200410023870 CN 200410023870 A CN200410023870 A CN 200410023870A CN 1563864 A CN1563864 A CN 1563864A
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Abstract
Frequency-changing refrigerator includes constant speed compressor and MPU etc. Frequency-changing control is carried out for constant speed compressor by MPU connected to inverter, sampler for current and voltage and drive. The sampler and drive are connected between inverter and MPU. Another end of inverter is connected to constant speed compressor. The invention overcomes disadvantage of constant speed compressor.
Description
Technical field
The present invention relates to a kind of refrigerator and control method thereof, specifically, relate to a kind of frequency conversion refrigerator and control method thereof.
Background technology
Refrigerator of the prior art all is the fixed frequency refrigerator mostly, and its compressor is a constant speed compressor, and constant speed compressor can only remain on the rotary speed working of fixed frequency, and just there are shortcomings such as power consumption is big, noise is big, fresh keeping property is bad in this refrigerator.
Frequency conversion refrigerator has also appearred in the prior art, it has solved the shortcoming of fixed frequency refrigerator, but frequency conversion refrigerator of the prior art all is the frequency-changeable compressor that adopts, and the cost of frequency-changeable compressor just will exceed much than constant speed compressor, has so just improved the cost of whole refrigerator.
Summary of the invention
The technical scheme of frequency-converting control device of the present invention is such: it comprises MPU, inverter, driver and current-voltage sampling device, wherein driver and current-voltage sampling device are connected between MPU and the inverter, the filter rectification device is set between inverter and power supply, the filter rectification device also has an end to be connected with MPU, and driver is set to IGBT or mosfet driver.
Refrigerator of the present invention is provided with a frequency-converting control device on the basis of constant speed compressor refrigerator, realized the VFC of constant speed compressor.
The technical scheme of frequency conversion refrigerator of the present invention is such: it comprises constant speed compressor, MPU etc., and MPU connects inverter, current-voltage sampling device and driver; Inverter, current-voltage sampling device and driver carry out VFC with MPU to constant speed compressor, wherein current-voltage sampling device and driver are connected between inverter and the MPU, the other end of inverter is connected with constant speed compressor, MPU connects the filter rectification device, the filter rectification device links to each other with inverter, power supply and MPU, driver is set to IGBT or mosfet driver, and each end symmetry of constant speed compressor connects two IGBT or mosfet driver.
The control method of frequency conversion refrigerator of the present invention comprises the following steps:
(1) sets the normal temperature of each chamber of refrigerator, the frequency and the highest and low-limit frequency of temperature difference size correspondence;
(2) MPU ceaselessly reads the data of the temperature sensor and the supply voltage of refrigerator;
(3) after MPU receives the data of temperature sensor, carry out Temperature Treatment;
(4) MPU produces the correspondent frequency data according to the Temperature Treatment result of step (2), and promptly the big frequency of the temperature difference is big, and the frequency that has a narrow range of temperature is little;
(5) according to the frequency data of step (4), get relevant voltage according to the correspondent frequency data;
(6) calculate generation SPWM data by supply voltage again;
(7) MPU samples to the current/voltage of driver step (6) time; The SPWM data are exported control;
(8) MPU calculates according to the information of step (6) and step (7), and the SPWM data that will reach the highest coefficient of refrigerating performance C.O.P value are sent to driver;
(9) the driver drives compressor is in correspondent frequency work;
(10) temperature of each chamber of refrigerator reaches setup parameter, and compressor quits work, and enters next circulation.The quick-frozen key is set on the refrigerator of the present invention, and MPU is provided with the quick-frozen frequency of corresponding quick-frozen key, the i.e. the highest operating frequency of compressor.
Frequency conversion refrigerator of the present invention has not only solved the shortcoming of constant speed compressor refrigerator, and has solved the expensive problem of frequency-changeable compressor refrigerator.
Description of drawings
Fig. 1 is the structural representation of frequency-variable controller of the present invention;
Fig. 2 is the schematic diagram of frequency-variable controller of the present invention.
The specific embodiment
Frequency-converting control device of the present invention comprises MPU, filter rectification device, inverter, current-voltage sampling device and driver, its acting in conjunction can be carried out VFC to constant speed compressor, so just can in daily electrical equipment such as refrigerator, air-conditioning etc., come usefulness to constant speed compressor as frequency-changeable compressor, reduce the cost of electrical equipment such as refrigerator, air-conditioning.
As shown in Figure 1, MPU in the refrigerator of the present invention is connected with filter rectification device, inverter, current-voltage sampling device and driver, the shared MPU of filter rectification device, inverter, current-voltage sampling device and driver and refrigerator plays the purpose of VFC, direct so continuous VFC and the integrated control of refrigerator master control that has realized refrigerator to the constant speed compressor of refrigerator; With the SPWM output generation amplitude at the two-way of single-chip microcomputer symmetry edge, the sine-wave current of changeable frequency; two-way ADC monitors electric current, the voltage of compressor operating; guarantee that compressor operating is in operating voltage that requires and current range; just adjust if go beyond the scope, can't adjust or occur to carry out when unusual stoppage protection.The main control part of refrigerator is by collection, analysis and calculating to information such as the temperature of each chamber of refrigerator, the temperature difference, rate of temperature changes, determine the power-up sequence and parameters such as the moment, compressor operating frequency, compressor operating voltage of each chamber of refrigerator, realize purposes such as energy saving of system, temperature control, quick-frozen.Like this and in refrigerator, realized the VFC of constant speed compressor, on the low side with respect to frequency-changeable compressor of constant speed compressor, thus reduced the cost of whole refrigerator.
As shown in Figure 2, frequency-converting control device is such to the control principle of compressor, constant speed compressor has two terminals, it all is connected with frequency-converting control device, at the positive half cycle of sine-wave current, the 2PWM end will be put high-impedance state, and the 1XUAN end is also put high-impedance state simultaneously, 2XUAN holds conducting, and the SPWM pulse that produces at the 1PWM end just can make the compressor two ends form a sine-wave current like this; At the sine-wave current negative half period, the 1PWM end is put high-impedance state, and the 2XUAN end is put high-impedance state simultaneously, and 1XUAN holds conducting, and the SPWM pulse that produces at the 2PWM end can make the compressor two ends form the SPWM pulse of a half-sinusoid electric current like this.Just can produce the impulse train voltage that can form complete sine-wave current at the two ends of compressor like this, satisfy the operating voltage condition of constant speed compressor.Adjust the dutycycle of SPWM impulse train, can adjust the waveform shape of electric current; The dutycycle of impulse train be multiply by a constant, and the value of adjusting constant just can change the amplitude of sine-wave current; And the cycle of SPWM pulse just can be adjusted the cycle of sine-wave current.Cycle, dutycycle and dutycycle constant by MPU control SPWM impulse train, just can control cycle, waveform shape and the current amplitude of the sine-wave current that flows through compressor effectively, thereby make compressor according to the parameter work of predesignating, reach the purpose of constant speed compressor being carried out VFC.Constant speed compressor is on the low side with respect to frequency-changeable compressor, by above-mentioned frequency-variable controller, has not only realized the function of frequency conversion refrigerator, and has reduced the function of frequency conversion refrigerator, thereby frequency conversion refrigerator can be come in the user family widely.
The control procedure of whole refrigerator is such, the temperature sensor of refrigerator, keyboard and display, magnetic valve/illuminating lamp/controllers such as heater all are connected with MPU, the shared MPU of refrigerator and frequency-converting control device makes the integrated control of refrigerator become possibility like this.MPU just can regulate and control refrigerator according to a plurality of parameters in the refrigerator like this, thereby just can carry out VFC to constant speed compressor according to a plurality of parameters in the refrigerator for frequency-converting control device.Frequency-converting control device is such to the control procedure of compressor, MPU ceaselessly receives the signal of temperature sensor etc., then temperature parameter is handled, when the temperature difference that detects refrigerator is bigger, it will be got the big signal generated frequency data of frequency and get correspondent voltage according to the correspondent frequency data then, calculate by supply voltage then and generate the SPWM data, the SPWM data are sent to output control module, current/voltage circuit sampling circuit ceaselessly is sent to output control module with the current and voltage data of driver behind over-sampling, output control module adopts signal to carry out sending signals to driver after the integrated treatment to SPWM signal and current/voltage, driver just is sent to compressor with needed frequency of refrigerator and voltage, and compressor is just according to the voltage and the frequency signal work of driver.
The quick-frozen key is set on the refrigerator of the present invention, MPU is provided with the quick-frozen frequency of corresponding quick-frozen key, it is the highest operating frequency of compressor, when the user need carry out quick-frozen to food, only need by the quick-frozen key, MPU will send signals to driver immediately, and driver turns round the drive compression machine at the highest operating frequency, thereby whole refrigerator has just reached the purpose of quick-frozen.
Refrigerator of the present invention uses constant speed compressor to realize the function of frequency conversion refrigerator, has reduced the cost of frequency conversion refrigerator, and can to make the coefficient of refrigerating performance of refrigerator be that C.O.P value reaches maximum, can extensive use in the refrigerator field.
Claims (9)
1, a kind of frequency-converting control device is characterized in that: it comprises MPU, inverter, driver and current-voltage sampling device, and wherein driver and current-voltage sampling device are connected between MPU and the inverter.
2, frequency-converting control device according to claim 1 is characterized in that: the filter rectification device is set between inverter and power supply, and the filter rectification device also has an end to be connected with MPU.
3, frequency-converting control device according to claim 2 is characterized in that: driver is set to IGBT or mosfet driver.
4, a kind of frequency conversion refrigerator, it comprises constant speed compressor, MPU etc., it is characterized in that: the last connection of MPU inverter, current-voltage sampling device and driver; Inverter, current-voltage sampling device and driver carry out VFC with MPU to constant speed compressor, and wherein current-voltage sampling device and driver are connected between inverter and the MPU, and the other end of inverter is connected with constant speed compressor;
5, frequency conversion refrigerator according to claim 4 is characterized in that: the last connection of MPU filter rectification device, the filter rectification device links to each other with inverter, power supply and MPU.
6, frequency conversion refrigerator according to claim 5 is characterized in that: driver is set to IGBT or mosfet driver.
7, frequency conversion refrigerator according to claim 6 is characterized in that: each end symmetry of constant speed compressor connects two IGBT or mosfet driver.
8, a kind of control method of frequency conversion refrigerator, it is characterized in that: it comprises the following steps:
(1) sets the normal temperature of each chamber of refrigerator, the frequency and the highest and low-limit frequency of temperature difference size correspondence;
(2) MPU ceaselessly reads the data of the temperature sensor and the supply voltage of refrigerator;
(3) after MPU receives the data of temperature sensor, carry out Temperature Treatment;
(4) MPU produces the correspondent frequency data according to the Temperature Treatment result of step (2), i.e. the big frequency height of the temperature difference, and the frequency that has a narrow range of temperature is low;
(5) according to the frequency data of step (4), get relevant voltage according to the correspondent frequency data;
(6) calculate generation SPWM data by supply voltage again;
(7) MPU samples to the current/voltage of driver step (6) time, and the SPWM data are exported control;
(8) MPU calculates according to the information of step (6) and step (7), and the SPWM data that will reach the highest coefficient of refrigerating performance C.O.P value are sent to driver;
(9) the driver drives compressor is in correspondent frequency work;
(10) temperature of each chamber of refrigerator reaches setup parameter, and compressor quits work, and enters next circulation.
9, the control method of frequency conversion refrigerator according to claim 8 is characterized in that: the quick-frozen key is set on the refrigerator, and MPU is provided with the quick-frozen frequency of corresponding quick-frozen key, the i.e. the highest operating frequency of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410023870 CN1563864A (en) | 2004-04-02 | 2004-04-02 | Conversion refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410023870 CN1563864A (en) | 2004-04-02 | 2004-04-02 | Conversion refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1563864A true CN1563864A (en) | 2005-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410023870 Pending CN1563864A (en) | 2004-04-02 | 2004-04-02 | Conversion refrigerator |
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| Country | Link |
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| CN (1) | CN1563864A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563938A (en) * | 2010-12-24 | 2012-07-11 | 海尔集团公司 | Mechanical type frequency conversion refrigerator and refrigerating circuit for mechanical type refrigerator |
| CN103441732A (en) * | 2013-09-10 | 2013-12-11 | 时光科技有限公司 | Refrigerator and inverter compressor controlling device thereof |
| CN105116804A (en) * | 2015-08-21 | 2015-12-02 | 广东美的暖通设备有限公司 | Negative-logical IGBT/MOSFET driving circuit, driving system and driving method, and air conditioner |
-
2004
- 2004-04-02 CN CN 200410023870 patent/CN1563864A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563938A (en) * | 2010-12-24 | 2012-07-11 | 海尔集团公司 | Mechanical type frequency conversion refrigerator and refrigerating circuit for mechanical type refrigerator |
| CN103441732A (en) * | 2013-09-10 | 2013-12-11 | 时光科技有限公司 | Refrigerator and inverter compressor controlling device thereof |
| CN105116804A (en) * | 2015-08-21 | 2015-12-02 | 广东美的暖通设备有限公司 | Negative-logical IGBT/MOSFET driving circuit, driving system and driving method, and air conditioner |
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