CN111895719B - Temperature correction control method for air-cooled refrigerator - Google Patents
Temperature correction control method for air-cooled refrigerator Download PDFInfo
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- CN111895719B CN111895719B CN202010712980.3A CN202010712980A CN111895719B CN 111895719 B CN111895719 B CN 111895719B CN 202010712980 A CN202010712980 A CN 202010712980A CN 111895719 B CN111895719 B CN 111895719B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Abstract
The invention discloses a method for correcting temperature correction parameters of an air-cooled refrigerator, which is characterized in that an electric control device of the air-cooled refrigerator determines the corrected temperature correction parameters according to the following method except for A, B, C and D working stages, and according to a formula: corrected temperature differenceCalculating a corrected temperature difference by the initial temperature difference and the corrected temperature correction parameter, and further controlling the running state of the air-cooled refrigerator according to the corrected temperature difference; in the second ring temperature interval, the WXXZ of the refrigerating chamber, the warming chamber and the freezing chamber are each:
in the third ring temperature zone, WXXZ for the refrigerator, warming and freezer compartments are each:
by adopting the invention, under the condition of environment temperature change, the temperature control of the refrigerator has obvious accuracy compared with the uncorrected temperature correction parameter, so that the temperature of each compartment is consistent with the set temperature.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a temperature compensation correction method for an air-cooled refrigerator.
Background
Refrigerators have been introduced into thousands of households, and are essential appliances for storing food at low temperature in most households. The temperature deviation of the traditional refrigerator temperature control along with the change of the environment temperature is large, the temperature in the refrigerator is lower than the set temperature when the environment temperature (environment temperature) is low, and the temperature in the refrigerator is higher than the set temperature when the environment temperature is high. Along with the improvement of the requirement of people on the precision of the temperature of the refrigerator, the precision temperature control of the refrigerator under various environmental temperatures is not slow. Accurate temperature control requires accurate temperature correction parameters, and the temperature correction parameters of each chamber (a refrigerating chamber, a freezing chamber, a temperature changing chamber and the like) of the refrigerator in the prior art are all 8 multiplied by original temperature difference. The original temperature difference refers to the difference between the average compartment temperature measured by the compartment temperature sensor and the set compartment temperature, namely the average compartment temperature-the set compartment temperature. According to the temperature correction parameter, an electric control device (a controller, which can adopt a single chip microcomputer or an integrated circuit) of the refrigerator calculates the correction temperature difference. And the corrected temperature difference is the original temperature difference plus the temperature correction parameter.
The temperature control principle of the existing refrigerator compartment is to control according to the corrected temperature difference, namely the corrected temperature difference.
For the refrigerating chamber and the temperature changing chamber, the electric control device controls the opening and closing state and the opening degree of the air door corresponding to the chamber according to the corrected temperature difference of the chamber;
for the freezing chamber, the electric control device controls the rotation speed of the compressor according to the corrected temperature difference of the interval.
In the existing temperature control method of the air-cooled refrigerator, the temperature correction parameter is not connected with the influence of the ambient temperature on the refrigerator, so that the deviation is caused to the control of the refrigerator temperature after the ambient temperature changes.
The research team of the applicant carefully researches the relationship between the actual operation process of the refrigerator and the environmental temperature, and finds that the following factors are unfavorable for accurate temperature control in the existing operation method:
firstly, when the ring temperature was crossed lowly, evaporating temperature on the evaporimeter can reduce along with the reduction of ring temperature to the cold wind temperature that blows out also can be on the low side, because sensor perception temperature has certain hysteresis quality, thereby when the sensor perception to the temperature preparation shut down the back, because the temperature of air outlet is on the low side than normal temperature, thereby causes average temperature in the refrigerator can be on the low side.
When the ring temperature is too high, the evaporating temperature on the evaporator can rise along with the rise of the ring temperature, so that the temperature of cold air blown out can be higher, the sensor sensing temperature has certain hysteresis, and the temperature of the air outlet is higher than normal temperature after the temperature is prepared to be stopped when the sensor senses the temperature, so that the average temperature in the refrigerator can be higher.
In the existing control method, because the temperature correction parameter does not consider the influence of the ambient temperature, the temperature in the refrigerator deviates from a set value when the ambient temperature is too high or too low.
Disclosure of Invention
The invention aims to provide a method for correcting a temperature correction parameter of an air-cooled refrigerator, which can obtain the corrected temperature correction parameter under the condition of environment temperature change so as to keep the temperature in the refrigerator consistent with a set value.
In order to achieve the purpose, the invention provides a correction method of temperature correction parameters of an air-cooled refrigerator, wherein the air-cooled refrigerator is provided with three compartments, namely a refrigerating compartment, a temperature-changing compartment and a freezing compartment, and more than one temperature sensor is respectively arranged in the refrigerating compartment, the temperature-changing compartment and the freezing compartment;
an electric control device of the air-cooled refrigerator receives temperature signals of temperature sensors in a refrigerating chamber, a temperature-changing chamber and a freezing chamber and calculates the average temperature TPJ in each chamber; the refrigerating chamber, the temperature changing chamber and the freezing chamber are respectively provided with target temperatures TMB set by a user;
the temperature correction parameter is WX, and the unit is; for each compartment, WX ═ 8 × (TPJ-TMB);
the electric control device of the air-cooled refrigerator is pre-stored with the maximum time T1 of the continuous operation of the compressor after power-on preset by a designer, wherein the time T1 is more than or equal to 200 minutes and less than or equal to 220 minutes;
the maximum continuous operation time T2 of the compressor after defrosting preset by a designer is prestored in an electric control device of the air-cooled refrigerator, wherein the time T2 is more than or equal to 230 minutes and less than or equal to 250 minutes;
the electric control device of the air-cooled refrigerator is pre-stored with an electricity-saving state preset by a designer;
during the following working stages of the air-cooled refrigerator, the WX values of the refrigerating chamber, the temperature-changing chamber and the freezing chamber are all performed according to the prior control method:
A. after the start of electrification, before the temperature control shutdown of the compressor of the air-cooled refrigerator or before the continuous running time of the compressor reaches T1 minutes, the time that the two meet first is taken as the standard;
B. pre-cooling period before defrosting;
C. after defrosting is finished, before the compressor of the air-cooled refrigerator is stopped by temperature control or the continuous running time of the compressor reaches T2 minutes, the time that the compressor and the compressor meet the requirements in advance is taken as the standard;
D. during a power saving state;
outside A, B, C and D working stages, the electric control device of the air-cooled refrigerator determines the corrected temperature correction parameter according to the following method, according to the formula: calculating the corrected temperature difference, namely the original temperature difference and the corrected temperature correction parameter, and further controlling the running state of the air-cooled refrigerator according to the corrected temperature difference, specifically controlling the opening and closing states and the opening degrees of an air door of a refrigerating chamber and an air door of a temperature-variable chamber respectively according to the corrected temperature difference of the refrigerating chamber and the temperature-variable chamber; controlling the starting and stopping state and the running frequency of the compressor according to the corrected temperature difference of the freezing chamber;
the corrected temperature correction parameter is WXXZ, and the unit is;
the environment temperature is TC, the first ring temperature range is when TC is less than 10 ℃, and the second ring temperature range is when TC is more than 10 ℃ and less than 25 ℃; the temperature is a third ring temperature range when the temperature is more than 25 ℃ and less than TC and 38 ℃; the fourth temperature zone is when the TC is higher than 38 ℃;
when TC is 10 ℃, WXXZ is WX, which is recorded as WX 10;
when TC is 25 ℃, WXXZ is WX, which is recorded as WX 25;
WXXZ ═ WX at TC 38 ℃ as WX 38;
(1) in the second ring-temperature interval,
WXXZ for the cold room, the variable temperature room and the freezing room are all as follows:
(2) in the third ring-temperature interval,
WXXZ for the cold room, the variable temperature room and the freezing room are all as follows:
in the first ring temperature zone, the WXXZ of the refrigerator compartment, the temperature-changing compartment, and the freezer compartment are each: WXXZ ═ WX 10;
in the fourth ring temperature zone, WXXZ for the refrigerator, warming and freezer compartments are each: WXXZ ═ WX 38.
The invention has the following advantages:
the invention creatively provides the technical problem of how to obtain accurate corrected temperature difference under the condition of large environmental temperature change, and solves the technical problem through the algorithm in the invention, according to the research of the inventor, the environment temperature is divided into three temperature areas, the existing algorithm of temperature correction parameters is used as the basis, with the knowledge that the environment can form influence on the temperature correction parameters as guidance, firstly, an environment temperature point which can obtain correct temperature correction parameters by the existing temperature correction parameter algorithm and further keep the temperature in the refrigerator consistent with a set value is found (firstly, the existing temperature correction parameters can be accurately suitable for other environment temperature points besides 25 ℃), and then, calculating temperature correction parameters at each environmental temperature through an algorithm, so that the electric control device of the refrigerator can more accurately adjust the temperature in each compartment. Experiments prove that the temperature correction parameters calculated by the algorithm in the invention can enable the difference value between the temperature in the refrigerator and a set value to be always kept in the range of +/-1 ℃ when the electric control device controls the running state (an air door or a compressor) of the refrigerator according to the existing compartment temperature control method; by the algorithm, the temperature control of the refrigerator has remarkable accuracy compared with the uncorrected temperature correction parameter under the condition of environment temperature change.
Drawings
Fig. 1 is a schematic diagram of the variation of the corrected temperature correction parameter with the variation of the ambient temperature.
Detailed Description
As shown in fig. 1, the invention discloses a method for correcting temperature correction parameters of an air-cooled refrigerator, wherein the air-cooled refrigerator is provided with three compartments, namely a refrigerating compartment, a temperature-changing compartment and a freezing compartment, and more than one temperature sensor is respectively arranged in the refrigerating compartment, the temperature-changing compartment and the freezing compartment;
an electric control device of the air-cooled refrigerator receives temperature signals of temperature sensors in a refrigerating chamber, a temperature-changing chamber and a freezing chamber and calculates the average temperature TPJ in each chamber; the refrigerating chamber, the temperature changing chamber and the freezing chamber are respectively provided with target temperatures TMB set by a user;
the temperature correction parameter is WX, and the unit is; for each compartment, WX ═ 8 × (TPJ-TMB);
the electric control device of the air-cooled refrigerator is pre-stored with the maximum time T1 of the continuous operation of the compressor after power-on preset by a designer, wherein the time T1 is more than or equal to 200 minutes and less than or equal to 220 minutes;
the maximum continuous operation time T2 of the compressor after defrosting preset by a designer is prestored in an electric control device of the air-cooled refrigerator, wherein the time T2 is more than or equal to 230 minutes and less than or equal to 250 minutes;
the electric control device of the air-cooled refrigerator is pre-stored with an electricity-saving state preset by a designer;
during the following working stages of the air-cooled refrigerator, the WX values of the refrigerating chamber, the temperature-changing chamber and the freezing chamber are all performed according to the prior control method:
A. after the power-on starts, before the temperature of the compressor of the air-cooled refrigerator is controlled to stop (the temperature of each room reaches a set value, and the electric control device closes the compressor) or before the continuous operation time of the compressor reaches T1 minutes, the time that the temperature of each room and the temperature of the compressor meet the set value is taken as the standard;
B. pre-cooling period before defrosting;
C. after defrosting is finished, before the compressor of the air-cooled refrigerator is stopped by temperature control or the continuous running time of the compressor reaches T2 minutes, the time that the compressor and the compressor meet the requirements in advance is taken as the standard;
D. during a power saving state;
in A, B, C and D four working stages, the value range of the temperature correction parameter is less than or equal to 100 and more than or equal to-100, which is the prior art;
outside A, B, C and D working stages, the electric control device of the air-cooled refrigerator determines the corrected temperature correction parameter according to the following method, according to the formula: calculating the corrected temperature difference, namely the original temperature difference and the corrected temperature correction parameter, and further controlling the running state of the air-cooled refrigerator according to the corrected temperature difference, specifically controlling the opening and closing states and the opening degrees of an air door of a refrigerating chamber and an air door of a temperature-variable chamber respectively according to the corrected temperature difference of the refrigerating chamber and the temperature-variable chamber; controlling the starting and stopping state and the running frequency of the compressor according to the corrected temperature difference of the freezing chamber;
the corrected temperature correction parameter is WXXZ, and the unit is;
the environment temperature is TC, the first ring temperature range is when TC is less than 10 ℃, and the second ring temperature range is when TC is more than 10 ℃ and less than 25 ℃; the temperature is a third ring temperature range when the temperature is more than 25 ℃ and less than TC and 38 ℃; the fourth temperature zone is when the TC is higher than 38 ℃;
when TC is 10 ℃, WXXZ is WX, which is recorded as WX 10;
when TC is 25 ℃, WXXZ is WX, which is recorded as WX 25;
WXXZ ═ WX at TC 38 ℃ as WX 38;
(1) in the second ring-temperature interval,
WXXZ for the cold room, the variable temperature room and the freezing room are all as follows:
(2) in the third ring-temperature interval,
WXXZ for the cold room, the variable temperature room and the freezing room are all as follows:
2. the method for correcting the temperature correction parameter of the air-cooled refrigerator according to claim 1, wherein:
(3) in the first ring temperature zone, the WXXZ of the refrigerator compartment, the temperature-changing compartment, and the freezer compartment are each: WXXZ ═ WX 10;
(4) in the fourth ring temperature zone, WXXZ for the refrigerator, warming and freezer compartments are each: WXXZ ═ WX 38.
Research and development instructions:
after the temperature correction parameter is used to obtain the corrected temperature difference, the temperature control of the refrigerator has obvious accuracy compared with the uncorrected temperature correction parameter, and in the prior art, the accuracy of the temperature correction parameter is not questioned by technicians in the field. For refrigerators applied in a thermostatic chamber (around 25 ℃), the existing temperature correction parameters are sufficiently accurate. However, when the temperature of the use environment of the refrigerator is not constant and the change of the environment temperature is large, the corrected temperature difference obtained by the existing temperature correction parameter has large deviation, and the deviation between the actual temperature and the set temperature of each compartment in the refrigerator can be easily caused by controlling the compartment temperature of the refrigerator (by controlling the air door or the compressor) by the electric control device of the refrigerator according to the corrected temperature difference.
The invention creatively provides the technical problem of how to obtain accurate correction temperature difference under the condition of large environmental temperature change, solves the technical problem through the algorithm in the invention, and according to the research of the inventor, divides the environmental temperature into three temperature areas, relies on the existing algorithm of temperature correction parameters, and guides the understanding that the environment can influence the temperature correction parameters, firstly, the existing algorithm of temperature correction parameters can obtain the correct temperature correction parameters, and further the environmental temperature point at which the temperature in the refrigerator is always consistent with the set value is found, and then the temperature correction parameters under each environmental temperature are calculated through the algorithm, so that the electric control device of the refrigerator can more accurately adjust the temperature in each room. Of course, this first of all requires the recognition that the existing temperature correction parameters can be accurately adapted to other ambient temperature points than 25 ℃. Experiments prove that the temperature correction parameter calculated by the algorithm in the invention can enable the difference between the temperature in the refrigerator and a set value to be kept within the range of +/-1 ℃ all the time when the electric control device controls the running state (an air door or a compressor) of the refrigerator according to the existing compartment temperature control method.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (2)
1. The air-cooled refrigerator is provided with three chambers, namely a refrigerating chamber, a temperature-changing chamber and a freezing chamber, wherein more than one temperature sensor is arranged in the refrigerating chamber, the temperature-changing chamber and the freezing chamber respectively;
an electric control device of the air-cooled refrigerator receives temperature signals of temperature sensors in a refrigerating chamber, a temperature-changing chamber and a freezing chamber and calculates the average temperature TPJ in each chamber; the refrigerating chamber, the temperature changing chamber and the freezing chamber are respectively provided with target temperatures TMB set by a user;
the temperature correction parameter is WX, and the unit is; for each compartment, WX ═ 8 × (TPJ-TMB);
the electric control device of the air-cooled refrigerator is pre-stored with the maximum time T1 of the continuous operation of the compressor after power-on preset by a designer, wherein the time T1 is more than or equal to 200 minutes and less than or equal to 220 minutes;
the maximum continuous operation time T2 of the compressor after defrosting preset by a designer is prestored in an electric control device of the air-cooled refrigerator, wherein the time T2 is more than or equal to 230 minutes and less than or equal to 250 minutes;
the electric control device of the air-cooled refrigerator is pre-stored with an electricity-saving state preset by a designer;
during the following working stages of the air-cooled refrigerator, the WX values of the refrigerating chamber, the temperature-changing chamber and the freezing chamber are all performed according to the prior control method:
A. after the start of electrification, before the temperature control shutdown of the compressor of the air-cooled refrigerator or before the continuous running time of the compressor reaches T1 minutes, the time that the two meet first is taken as the standard;
B. pre-cooling period before defrosting;
C. after defrosting is finished, before the compressor of the air-cooled refrigerator is stopped by temperature control or the continuous running time of the compressor reaches T2 minutes, the time that the compressor and the compressor meet the requirements in advance is taken as the standard;
D. during a power saving state;
the method is characterized in that:
outside A, B, C and D working stages, the electric control device of the air-cooled refrigerator determines the corrected temperature correction parameter according to the following method, according to the formula: calculating the corrected temperature difference, namely the original temperature difference and the corrected temperature correction parameter, and further controlling the running state of the air-cooled refrigerator according to the corrected temperature difference, specifically controlling the opening and closing states and the opening degrees of an air door of a refrigerating chamber and an air door of a temperature-variable chamber respectively according to the corrected temperature difference of the refrigerating chamber and the temperature-variable chamber; controlling the starting and stopping state and the running frequency of the compressor according to the corrected temperature difference of the freezing chamber;
the corrected temperature correction parameter is WXXZ, and the unit is;
the environment temperature is TC, the first ring temperature range is when TC is less than 10 ℃, and the second ring temperature range is when TC is more than 10 ℃ and less than 25 ℃; the temperature is a third ring temperature range when the temperature is more than 25 ℃ and less than TC and 38 ℃; the fourth temperature zone is when the TC is higher than 38 ℃;
when TC is 10 ℃, WXXZ is WX, which is recorded as WX 10;
when TC is 25 ℃, WXXZ is WX, which is recorded as WX 25;
WXXZ ═ WX at TC 38 ℃ as WX 38;
(1) in the second ring-temperature interval,
WXXZ for the cold room, the variable temperature room and the freezing room are all as follows:
(2) in the third ring-temperature interval,
WXXZ for the cold room, the variable temperature room and the freezing room are all as follows:
2. the method for correcting the temperature correction parameter of the air-cooled refrigerator according to claim 1, wherein:
in the first ring temperature zone, the WXXZ of the refrigerator compartment, the temperature-changing compartment, and the freezer compartment are each: WXXZ ═ WX 10;
in the fourth ring temperature zone, WXXZ for the refrigerator, warming and freezer compartments are each: WXXZ ═ WX 38.
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| CN115406175B (en) * | 2021-05-26 | 2024-03-29 | 海信容声(广东)冰箱有限公司 | Refrigerator and control method thereof |
| CN113587521A (en) * | 2021-07-19 | 2021-11-02 | 珠海格力电器股份有限公司 | Refrigerator cold storage chamber temperature control method and device, refrigerator and storage medium |
| CN113776269B (en) * | 2021-09-24 | 2023-03-24 | Tcl家用电器（合肥）有限公司 | Control method of refrigerator |
| WO2023240900A1 (en) * | 2022-06-14 | 2023-12-21 | 海信冰箱有限公司 | Refrigerator |
| CN114923310A (en) * | 2022-06-14 | 2022-08-19 | 海信（山东）冰箱有限公司 | Refrigerator and control method and device of refrigeration system |
| CN116430923B (en) * | 2023-06-12 | 2023-08-15 | 沈阳兴华诺车辆科技有限公司 | Intelligent control and regulation method and device for temperature |
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| JP3139832B2 (en) * | 1992-06-04 | 2001-03-05 | ホシザキ電機株式会社 | Electric control device for refrigerator |
| DE19846860A1 (en) * | 1998-10-12 | 2000-04-13 | Bsh Bosch Siemens Hausgeraete | Temperature regulation in refrigeration compartment of refrigerator and/or freezer involves varying control value for coolant compressor depending on detected value for ambient temperature |
| JP2005249327A (en) * | 2004-03-05 | 2005-09-15 | Matsushita Electric Ind Co Ltd | Control device for refrigerator |
| CN1758001A (en) * | 2004-10-09 | 2006-04-12 | 河南新飞电器有限公司 | Temperature control method of refrigerator |
| JP2006242531A (en) * | 2005-03-07 | 2006-09-14 | Matsushita Electric Ind Co Ltd | Control device of refrigerator |
| CN101408775B (en) * | 2007-10-12 | 2012-07-25 | 苏州三星电子有限公司 | Refrigerator temperature control method |
| CN101545706B (en) * | 2008-03-24 | 2012-01-04 | 海尔集团公司 | Method for controlling frequency conversion of frequency conversion refrigerator |
| CN103900339B (en) * | 2014-02-28 | 2016-02-24 | 海信（山东）冰箱有限公司 | A kind of control method of wind cooling refrigerator |
| CN104949456A (en) * | 2015-03-17 | 2015-09-30 | 广东奥马电器股份有限公司 | Independent temperature control method of single-circulation three-temperature-zone refrigerator |
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