CN1548908A

CN1548908A - Control method for forward or backward rotary compressor of electric refrigerator

Info

Publication number: CN1548908A
Application number: CNA031299180A
Authority: CN
Inventors: 高勇德
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2003-05-22
Filing date: 2003-05-22
Publication date: 2004-11-24

Abstract

The control method for forward/backward rotation compressor in refrigerator is to sense the overload in the refrigerator and to make the compressor rotate in forward direction to provide great amount of cold air. In order to realize the said function, the present invention makes the compressor rotate in forward or backward direction to maintain the set temperature inside the refrigerator. The operation process includes: the first stage of sensing the close of the refrigerator door and detecting the temperature inside the refrigerator while the door is closed; the second stage of detecting the temperature inside the refrigerator after some set time, judging whether the temperature inside the refrigerator is above the set temperature, and if so, rotating the compressor in forward direction; and the third stage of rotating the compressor in backward direction if the temperature inside the refrigerator is lower than the set temperature.

Description

Refrigerator just or the control method of contrary rotary compressor

Technical field

The present invention relates to a kind of refrigerator just or the control method (CLOCKWISE/COUNTERCLOCKWISE COMPRESSOR DRIVING CONTROL APPARATUS ANDMETHOD FOR REFRIGERATOR) of contrary rotary compressor, furtherly, relate to the excessive load in a kind of perception refrigerator, corresponding excessive load, compressor positive direction rotation, supply with fast a large amount of cold air come corresponding load variation refrigerator just or the control method of contrary rotary compressor.

Technical background

Generally speaking, the refrigerating circulation system that is applicable to refrigerator has following two kinds: the high refrigerating capacity circulatory system of cold air is provided and the low refrigerating capacity circulatory system of cold air is provided to refrigerating chamber to refrigerating chamber.

Above-mentioned high ability refrigerating capacity refrigerating circulation system or low ability refrigerating circulation system because the length of expansion gear is identical, can not embody the best freeze cycle with operation mode, with reference to the accompanying drawings prior art are elaborated.

Fig. 1 demonstrates the schematic drawing of the refrigerating circulation system of existing technology refrigerator, and as shown in the figure, the refrigerating circulation system of prior art refrigerator comprises as lower member: compressor 1, condenser 2, the first evaporimeter F-EVA, the second evaporimeter R-EVA.Above-mentioned compressor 1 sucks the low temperature of evaporimeter discharge, the refrigerant steam of low pressure compresses, and makes the refrigerant steam of high temperature, high pressure; Above-mentioned condenser 2 is discharged into the heat of the refrigerant steam of the high temperature of discharging from above-mentioned compressor 1, high pressure water or the air, again it is changed into the high pressure saturated solution; The high pressure saturated solution of discharging in the above-mentioned condenser 2 converts the refrigerant of low temperature, low pressure to by capillary 3, and the refrigerant that the above-mentioned first evaporimeter F-EVA sucks above-mentioned low temperature, low pressure makes its evaporation, and carries out heat exchange at refrigerating chamber, discharges chilled air; The high pressure saturated solution of discharging in the above-mentioned condenser 2 is by the refrigerant of 3 one-tenth low temperature of capillary, low pressure, and the refrigerant that the above-mentioned second evaporimeter R-EVA sucks above-mentioned low temperature, low pressure makes its evaporation, and carries out heat exchange at refrigerating chamber, discharges chilled air.

At first, freezing running, when also being the running of high refrigerating capacity, the refrigerant of the HTHP of compression in compressor 1, flow into condenser 2 condensations after, become the refrigerant of low-temp low-pressure through capillary 3.

Then, the refrigerant that the first evaporimeter F-EVA sucks above-mentioned low-temp low-pressure evaporates, and the saturated vapor that does not have liquid is discharged to refrigerating chamber.

When low refrigerating capacity turned round when refrigerating running, the refrigerant of the HTHP of compression on compressor 1 after 2 condensations of inflow condenser, became the refrigerant of low-temp low-pressure through capillary 3.

Afterwards, the refrigerant that the second evaporimeter R-EVA sucks above-mentioned low-temp low-pressure evaporates, and carries out heat exchange at refrigerating chamber, discharges chilled air.

At this, the compressor that the refrigerating circulation system of above-mentioned refrigerator adopts is only to the positive direction rotation, therefore output high-power all the time.Under the temperature maintenance stable status in refrigerator, do not need big refrigerating capacity to make compressor positive direction rotation yet, make the refrigerating circulation system of refrigerator of this prior art exist the big problem of the electric consumption.

In order to address the above problem, a kind of technology has appearred, and on refrigerator, adopt according to the size of refrigerating capacity and can select positive direction or contrary direction rotation compressor, reduce power consumption.When refrigerator through certain duration of runs, when being perceived as stable state, the compressor inverse direction rotation produces amount of cooling water in a small amount, to reduce power consumption.

But, there are the following problems for above-mentioned technical method: in refrigerating capacity compressor positive direction or contrary direction driving process, do not consider the load that moment increases, compressor still according to set just or contrary rotation, reduce the freshness of food, the temperature in the refrigerator drops to and sets temperature and need long time in addition.

Summary of the invention

The present invention designs in order to address the above problem, the object of the invention be to provide a kind of refrigerator with following effect just or the control method of contrary rotary compressor: the excessive load in the perception refrigerator, the variation of a large amount of cold air with the correspondence load supplied with in corresponding excessive load compressor positive direction rotation fast.

In order to realize aforesaid purpose, the invention provides a kind of by compressor just or contrary rotation keep the method for temperature that sets in the refrigerator.Its operation process is as follows: the phase I: the closing of perception refrigerator doors, and the temperature when checking closing refrigerator door; Second stage: through after a period of time that sets, check the temperature in the above-mentioned refrigerator, judge again whether the temperature of checking in the refrigerator is more than the temperature that sets, if the temperature in the refrigerator is more than the temperature that sets, the rotation of compressor positive direction; Phase III: according to above-mentioned judged result, if the temperature in the refrigerator is below the temperature that sets, then compressor inverse direction rotation.

As mentioned above, refrigerator of the present invention just or the control method of contrary rotary compressor have following effect: the excessive load in the perception refrigerator, corresponding excessive load compressor positive direction rotation is with a large amount of cold air of quick supply.

Description of drawings

Fig. 1 demonstrates the schematic drawing of the refrigerating circulation system of existing technology refrigerator;

Fig. 2 demonstrate refrigerator of the present invention just or the action flow chart of the control method of contrary rotary compressor.

The specific embodiment

Below, the accompanying drawing with reference to one embodiment of the invention is described in detail as follows.

Fig. 2 demonstrate refrigerator of the present invention just or the action flow chart of the control method of contrary rotary compressor, as shown in the figure, by compressor just or contrary rotation to keep the operation process of refrigerator of the temperature in the refrigerator as follows: phase I (step SP1～SP3): the closing of perception refrigerator doors, and the temperature when checking (CHECK) closing refrigerator door;

Second stage (step SP4～SP7): after checking the temperature in the above-mentioned refrigerator, through the time that sets, judge again whether the temperature of checking in the refrigerator is more than the temperature that sets, if the temperature in the refrigerator is more than the temperature that sets, the rotation of compressor positive direction;

Phase III (step SP8): according to above-mentioned judged result, if the temperature in the refrigerator is below the temperature that sets, then compressor inverse direction rotation.

At first, when the user opens refrigerator doors in order to preserve food load, when putting into after the food closing refrigerator door, the refrigerator doors sensor (SENSOR) of perception refrigerator doors state judges whether refrigerator doors closes, the words of not closing as its refrigerator doors of judged result, sound the alarm through refrigerator doors after setting the time, as judge that above-mentioned refrigerator doors closes, detect first temperature (step SP1～SP3) so.

Then, judged whether to pass through the time that sets, as passed through the time of setting, and second temperature in the inspection refrigerator (SP4, SP5).

Here, second temperature is for checking after first temperature through setting the temperature in the refrigerator after the time again.

According to top described, judge whether above-mentioned first, second temperature difference is more than 3 ℃, when above-mentioned first, second temperature difference is more than 3 ℃ the time, the rotation of compressor positive direction provides big amount of cooling water fast, the temperature in the refrigerator drop to rapidly the temperature that sets (step SP6, SP7).

If above-mentioned first, second temperature difference is less than more than 3 ℃ the time, the contrary direction of above-mentioned compressor press some cycles rotation at interval, continues to keep the interior state (step SP8) of refrigerator.

After this, if the temperature in the above-mentioned refrigerator is consistent with the temperature that sets, close above-mentioned compressor; If the inconsistent words of temperature that temperature in the above-mentioned refrigerator and user set, the rotation of compressor positive direction provides a large amount of cold air fast, temperature in the refrigerator is quickly fallen to the temperature that sets, temperature in the above-mentioned refrigerator and the temperature that sets become when consistent, close compressor (step SP9, SP10).

Promptly, refrigerator of the present invention is when putting into load, when whether at first perception refrigerator doors closes, check the refrigerator temperature inside, through after the time that sets, the difference of the above-mentioned refrigerator temperature inside that is checked through and the internal temperature that reads again is a uniform temperature (+3 ℃) when above, and the compressor positive direction is rotated provides a large amount of cold air fast, make and the variation of corresponding load rapidly continue to keep optimum state.

Claims

One kind by compressor just or contrary rotation keep the temperature that sets in the refrigerator refrigerator just or the control method of contrary rotary compressor, it is characterized in that operation process is:

Phase I: the closing of perception refrigerator doors, and the temperature when checking closing refrigerator door;

Second stage: through after a period of time that sets, check the temperature in the above-mentioned refrigerator, judge again whether the temperature of checking in the refrigerator is more than the temperature that sets, if the temperature in the refrigerator is more than the temperature that sets, the rotation of compressor positive direction;

Phase III: according to above-mentioned judged result, if the temperature in the refrigerator is below the temperature that sets, then compressor inverse direction rotation.
2. refrigerator according to claim 1 just or contrary rotary compressor method for controlling of operation is characterized in that:

The above-mentioned phase III also has following process: judge whether the temperature in the refrigerator is consistent with the temperature that sets, compressor positive direction rotation when temperature in the above-mentioned refrigerator and the temperature that sets are inconsistent; In the above-mentioned refrigerator temperature with set temperature when consistent, close compressor.
3. refrigerator according to claim 1 just or contrary rotary compressor method for controlling of operation is characterized in that:

In the phase I, as judge that above-mentioned refrigerator doors closes, detect first temperature so;

In second stage, comprising: judged whether to pass through the time that sets, as passed through the time of setting, checked the step of second temperature in the refrigerator;

Judge whether above-mentioned first, second temperature difference is more than 3 ℃, when above-mentioned first, second temperature difference is more than 3 ℃ the time, the rotation of compressor positive direction provides big amount of cooling water fast, the temperature in the refrigerator is dropped to the step of the temperature that sets rapidly;

If above-mentioned first, second temperature difference is less than more than 3 ℃ the time, the contrary direction of above-mentioned compressor press some cycles rotation at interval, continues to keep the step of the interior state of refrigerator.