CN109798713B - Three-circulation air-cooled refrigerator and defrosting method thereof - Google Patents
Three-circulation air-cooled refrigerator and defrosting method thereof Download PDFInfo
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- CN109798713B CN109798713B CN201910118909.XA CN201910118909A CN109798713B CN 109798713 B CN109798713 B CN 109798713B CN 201910118909 A CN201910118909 A CN 201910118909A CN 109798713 B CN109798713 B CN 109798713B
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Abstract
The invention discloses a three-cycle air-cooled refrigerator.A refrigeration fan operation target time parameter LCFSJ and other parameters are stored in an electric control device. The defrosting method comprises a freezing chamber defrosting method, a refrigerating chamber defrosting method and a variable-temperature chamber defrosting method. The freezing chamber defrosting method comprises a defrosting preparation step, a defrosting entering step, a defrosting step and a defrosting exiting step. According to the three-cycle air-cooled refrigerator and the defrosting method thereof, various specific working conditions in the operation process of the refrigerator are considered, the defrosting control is finely matched with the actual working conditions of the refrigerator, the defrosting effect is ensured, defrosting is avoided when defrosting is not needed, frequent defrosting is avoided, the defrosting electric heater is prevented from being turned on excessively, energy consumption is saved, and the phenomenon that defrosting cannot exit is prevented.
Description
Technical Field
The invention relates to an air-cooled refrigerator and a defrosting method of the air-cooled refrigerator.
Background
The air-cooled refrigerator is called a frostless refrigerator, and cold air is blown from an air outlet to the inside of a refrigerator body by using a fan and an air duct system in the air-cooled refrigerator so as to freeze and refrigerate food. The hot air and the water vapor are sucked into the return air duct along with the air circulation, and the water vapor is frozen on the surface of the evaporator to form a frost layer when the hot air passes through the evaporator, so that the frost in the box body can be removed. However, the frost layer condensed on the evaporator will affect the refrigeration performance, even block the air circulation, and on the contrary, the temperature of the box body will rise, which will affect the refrigeration effect and increase the energy consumption. Whether single-cycle, dual-cycle, or three-cycle refrigeration systems require defrosting of the evaporator. The defrosting technology is the key of the air-cooled refrigerator.
The existing defrosting technology is to use a compressor running timer to judge a period needing defrosting, a defrosting timer to record the starting duration of defrosting electric heating, the temperature of a defrosting sensor to judge the starting temperature of defrosting electric heating, the exiting temperature of defrosting electric heating and the like, so as to realize defrosting. In practical application, the thickness of the frost layer formed on the surface of the evaporator can be influenced by various factors such as the change of the environmental temperature, the change of the humidity, the change of the times of defrosting when the door is opened, the amount of food placed, the humidity of the food and the like.
In a refrigerator with a three-cycle refrigeration system, a freezing chamber and a temperature-changing chamber are generally defrosted by electric heating tubes, and a refrigerating chamber is defrosted by a fan-started defrosting mode. The frequency and time of defrosting of the freezing chamber and the temperature-variable chamber determine the time of starting the electric heating, and are factors influencing energy consumption.
Disclosure of Invention
The invention aims to provide a three-cycle air-cooled refrigerator, which provides a foundation for realizing refined defrosting regulation.
In order to achieve the purpose, the three-cycle air-cooled refrigerator comprises a box body with a refrigerating chamber, a variable-temperature fixing chamber and a freezing chamber, wherein an electric control device and a refrigerating system are arranged in the box body; a refrigerating door switch is arranged at the door body of the refrigerating chamber, a freezing door switch is arranged at the door body of the freezing chamber, and a variable temperature door switch is arranged at the door body of the variable temperature chamber; the refrigerating chamber is correspondingly provided with a refrigerating fan, the temperature-changing chamber is correspondingly provided with a temperature-changing fan, and the freezing chamber is correspondingly provided with a freezing fan; a freezing chamber temperature sensor for detecting the temperature in the freezing chamber is arranged in the freezing chamber; the freezing chamber evaporator is provided with a freezing chamber defrosting electric heater; a variable-temperature-chamber defrosting electric heater is arranged at the variable-temperature-chamber evaporator; a refrigerant pipeline between the compressor and each evaporator is provided with a two-position four-way electromagnetic valve, and an air suction port of the compressor is selectively communicated with a freezing chamber evaporator or a refrigerating chamber evaporator or a temperature-changing chamber evaporator through the two-position four-way electromagnetic valve;
a compressor running timer, a temperature-changing defrosting timer and a freezing defrosting timer are arranged in the electric control device;
the electric control device is internally stored with a refrigerating fan operation target time parameter LCFSJ and a refrigerating evaporation temperature sensor target temperature parameter TFCTE; a real-time temperature parameter CTHS detected by a refrigeration evaporation temperature sensor; an actual refrigerating time parameter LCSJ of the refrigerating chamber, a refrigerating target time parameter LCCS of the refrigerating chamber, a compressor accumulative operation conventional time parameter LJT, a compressor accumulative operation long time parameter LJTD, a compressor accumulative operation short time parameter LJTX, a falling temperature parameter TLD of a freezing chamber before defrosting, a refrigerating time TYL of the freezing chamber before defrosting, a real-time temperature parameter THS detected by a freezing and evaporating temperature sensor and a freezing and defrosting duration parameter HST recorded by a freezing and defrosting timer; the method comprises the following steps of (1) freezing and defrosting starting temperature parameter TDFT, defrosting regular time DJRT1, defrosting long time DJRT2, accumulated door opening times KMCS of a freezing chamber in an operation period, accumulated door opening time KMSJT of the freezing chamber in an operation period, a real-time temperature parameter FTHS detected by a variable-temperature evaporation temperature sensor, a variable-temperature evaporator defrosting control temperature parameter TFFTE, a variable-temperature defrosting time parameter FHST counted by a variable-temperature defrosting timer and a freezing chamber preset temperature parameter TLDY;
the units of the compressor accumulative operation conventional time parameter LJT, the compressor accumulative operation long time parameter LJTD and the compressor accumulative operation short time parameter LJTX are all hours;
the unit of the refrigerating fan operation target time parameter LCFSJ, the refrigerating time TYL of a refrigerating chamber before defrosting, the freezing and defrosting duration parameter HST recorded by a freezing and defrosting timer, the defrosting conventional time DJRT1, the defrosting long time DJRT2, the freezing chamber door opening accumulated time KMSJT in one operation period and the temperature-changing defrosting time parameter FHST are all minutes;
the units of a target temperature parameter TFCTE of a refrigeration evaporation temperature sensor, a real-time temperature parameter CTHS detected by the refrigeration evaporation temperature sensor, a falling temperature parameter TLD of a freezing chamber before defrosting, a real-time temperature parameter THS detected by a freezing and defrosting sensor, a freezing and defrosting starting temperature parameter TDFT, a real-time temperature parameter FTHS detected by a variable-temperature evaporation temperature sensor and a defrosting control temperature parameter TFFTE of a variable-temperature evaporator are respectively;
the units of the accumulated door opening times KMCS of the freezing chamber, the refrigeration target time parameter LCCS of the refrigerating chamber and the actual refrigeration time parameter LCSJ of the refrigerating chamber in one operation period are all times;
the compressor, the refrigeration fan, the variable temperature fan, the freezing evaporation temperature sensor for detecting the temperature of the freezing chamber evaporator, the refrigeration evaporation temperature sensor for detecting the temperature of the freezing chamber evaporator, the variable temperature evaporation temperature sensor for detecting the temperature of the variable temperature chamber evaporator, the freezing chamber temperature sensor for detecting the temperature in the freezing chamber, the refrigeration door switch, the freezing door switch and the variable temperature door switch are respectively connected with the electric control device.
The invention also aims to provide the defrosting method of the three-cycle air-cooled refrigerator, so that the defrosting control and the actual working condition of the refrigerator are matched in a refined manner, the defrosting effect is ensured, the defrosting is avoided when the defrosting is not needed, and the problem that the defrosting cannot exit is prevented.
The defrosting method of the three-cycle air-cooled refrigerator comprises the following steps:
the method comprises the following steps that a freezing chamber evaporator of the three-cycle air-cooled refrigerator carries out interval defrosting in the running process, and an operation period is from the last time of defrosting of the freezing chamber evaporator to the end of defrosting of the freezing chamber evaporator; when an operation period starts, a compressor operation timer counts the accumulated operation time of the compressor in the period from zero;
the defrosting method comprises a freezing chamber defrosting method;
the freezing chamber defrosting method includes first to fifth steps;
the first step is to enter defrosting preparation;
after the three-cycle air-cooled refrigerator is powered on and started or after an operation period begins, the electric control device continuously collects data of a compressor operation timer, the accumulated operation time of the compressor in the operation period is compared with the set operation time of the compressor, and when the accumulated operation time of the compressor in the operation period reaches the set operation time of the compressor, a defrosting preparation step is carried out;
the second step is defrosting preparation; the method comprises the following steps that an electric control device adjusts the original preset temperature parameter TLDY of a freezing chamber downwards to TLD ℃; entering a third step when at least one of the following two conditions a and b is satisfied:
the condition a is that the temperature detected by the freezing chamber temperature sensor is lower than or equal to TLDY-TLD ℃;
the condition b is that the time after the electric control device adjusts the original preset temperature parameter TLDY of the freezing chamber to TLD ℃ down reaches TYL minutes;
the third step is to enter defrosting;
when the real-time temperature parameter THS detected by the freezing and evaporating temperature sensor is less than or equal to the freezing and defrosting starting temperature parameter TDFT-3 ℃, entering a defrosting step;
the fourth step is a defrosting step;
the method comprises the following steps that an electric control device closes a compressor, simultaneously opens a freezing chamber defrosting electric heater and controls a freezing defrosting timer to start timing from zero, and the electric control device records freezing chamber defrosting duration time in a freezing defrosting duration time parameter HST;
entering a fifth step when at least one of the following two conditions c and d is satisfied after the electric heater for defrosting the freezing chamber starts;
the condition c is that the real-time temperature parameter THS detected by the freezing and evaporating temperature sensor is more than the freezing defrosting starting temperature parameter TDFT;
condition d is a freeze thaw duration parameter HST > 40 minutes;
the fifth step is to quit the defrosting step;
the electric control device resets the compressor running timer and executes the first step again;
and circularly executing the first step to the fifth step until the three-circulation air-cooled refrigerator is closed.
In the first step, the set compressor running time is a compressor accumulative running conventional time parameter LJT, a compressor accumulative running long time parameter LJTD or a compressor accumulative running short time parameter LJTX;
when the operation period is the first operation period after the three-cycle air-cooled refrigerator is powered on, the electric control device takes the accumulated operation conventional time parameter LJT of the compressor as the set operation time length of the compressor;
when the running period is not the first running period after the three-cycle air-cooled refrigerator is powered on, the electric control device compares the freezing and defrosting duration time parameter HST in the last running period with the defrosting conventional time DJRT1 and the defrosting long time DJRT2 and 40 minutes;
when the freezing defrosting duration parameter HST in the previous operation period meets the condition that DJRT1 minutes is not more than HST and is less than DJRT2 minutes, the electric control device takes the accumulated operation conventional time parameter LJT of the compressor as the set operation time length of the compressor;
when the freezing defrosting duration parameter HST in the previous operation period meets the condition that DJRT2 is not more than HST minutes, the electric control device takes the compressor accumulated operation short time parameter LJTX as the set compressor operation time length;
and when the freezing defrosting duration parameter HST in the previous operation period meets the condition that HST is less than DJRT1, the electric control device takes the accumulated operation long-time parameter LJTD of the compressor as the set operation time of the compressor.
The suction port of the compressor selects the time interval communicated with the evaporator of the refrigerating chamber as the refrigerating time interval of the refrigerating chamber through the two-position four-way electromagnetic valve; when an operation period begins, resetting an actual refrigerating time parameter LCSJ of a refrigerating chamber; adding 1 to the LCSJ parameter of the actual refrigeration time parameter of the refrigerating chamber every time the air suction port of the compressor is communicated with the evaporator of the refrigerating chamber;
the defrosting method also comprises a refrigerating chamber defrosting method;
the refrigerating chamber defrosting method comprises a defrosting method after the freezing chamber defrosting is finished and a defrosting method during the freezing chamber defrosting;
the defrosting method after the defrosting of the freezing chamber is as follows: when the actual refrigerating time parameter LCSJ of the refrigerating chamber is an integral multiple of the refrigerating target time parameter LCCS of the refrigerating chamber, after delaying for 20 minutes after the two-position four-way electromagnetic valve disconnects the air suction port of the compressor from the evaporator of the refrigerating chamber, the electric control device judges whether the condition h is met, if the condition h is met, the electric control device starts the refrigerating fan to start refrigerating chamber defrosting, and closes the refrigerating fan when the condition i is met so as to finish the refrigerating chamber defrosting;
the condition h is: the real-time temperature parameter CTHS detected by the refrigeration evaporation temperature sensor is less than or equal to the target temperature parameter TFCTE-1 ℃ of the refrigeration evaporation temperature sensor;
the condition i is: the starting time of the refrigerating fan reaches 30 minutes or a real-time temperature parameter CTHS detected by a refrigerating evaporation temperature sensor is more than or equal to a target temperature parameter TFCTE of the refrigerating evaporation temperature sensor;
the defrosting method during the defrosting of the freezing chamber comprises the following steps:
the electric control device starts the electric heater for defrosting in the freezing chamber and simultaneously starts the refrigeration fan; and (4) after the refrigerating fan operates for LCFSJ minutes or CTHS is larger than or equal to TFCTE, closing the refrigerating fan, and finishing the defrosting of the refrigerating chamber.
The defrosting method also comprises a variable-temperature chamber defrosting method; the defrosting method of the temperature-variable chamber comprises the following steps:
firstly, a starting method of defrosting of a temperature-variable chamber;
the electric control device judges whether a real-time temperature parameter FTHS detected by the variable-temperature evaporation temperature sensor is less than or equal to a variable-temperature defrosting starting temperature parameter TFFTE-3 ℃ or not while starting the electric defrosting heater of the freezing chamber, and if so, the electric defrosting heater of the variable-temperature chamber is started to defrost the evaporator of the variable-temperature chamber;
secondly, stopping the defrosting of the temperature-variable chamber;
the method for stopping defrosting of the temperature-variable chamber comprises the following steps: when at least one of the following two conditions of e and f is met, the electric control device turns off the temperature-variable chamber defrosting electric heater;
the condition e is that the real-time temperature parameter FTHS detected by the variable-temperature evaporation temperature sensor is larger than a variable-temperature evaporator defrosting control temperature parameter TFFTE;
the condition f is that the temperature-changing defrosting time parameter FHST is more than or equal to 40;
in the refrigerating chamber defrosting method, when the defrosting method after the defrosting of the freezing chamber is finished is carried out, if the electric control device receives a request for enabling the two-position four-way electromagnetic valve to select to communicate the air suction port of the compressor and the refrigerating chamber evaporator, the refrigerating chamber defrosting process is continued unchanged, and the request is not responded;
in the refrigerating chamber defrosting method, the entry condition of the defrosting of the freezing chamber is out of the condition h, the condition j is also included, and when the condition h and the condition j are simultaneously met, the electric control device starts the refrigerating fan; the condition j is: the refrigeration compartment is not operated in the quick cooling mode.
The invention has the following advantages:
according to the three-cycle air-cooled refrigerator and the defrosting method thereof, various specific working conditions in the operation process of the refrigerator are considered, the defrosting control is finely matched with the actual working conditions of the refrigerator, the defrosting effect is ensured, defrosting is avoided when defrosting is not needed, frequent defrosting is avoided, the defrosting electric heater is prevented from being turned on excessively, energy consumption is saved, and the phenomenon that defrosting cannot exit is prevented.
Before defrosting, the electric control device reduces TLD ℃ of the original set temperature of the freezing chamber to be lower than the original set value, the temperature rise of the freezing chamber in the defrosting process is responded in advance, the temperature of the freezing chamber in the defrosting process is lower, the temperature of the freezing chamber in the defrosting process is smaller than the temperature of the normal freezing chamber in the defrosting process, and the influence of the defrosting process on the quality of food in the freezing chamber is smaller. And the condition b can ensure that the defrosting step is timely carried out when the temperature of the freezing chamber is difficult to be reduced to TLDY-TLD ℃ due to the reason that the frost layer is thick and the like.
The third step of the freezing compartment defrosting method can prevent the entry of defrosting when there is no need to do so (when the freezing compartment evaporator temperature is high).
The condition c can timely quit defrosting when the temperature of the evaporator of the freezing chamber is high enough, and the condition d can prevent the condition that defrosting can not be quitted.
The duration of the freezing defrosting in the last operation cycle is not long or short, which indicates that the frost quantity is moderate, and the operation time of the compressor is a conventional value LJT.
When the last defrosting time is longer, the frost amount is indicated to be excessive, and the accumulated operation time of the compressor in the operation period is shortened, so that excessive frosting of the evaporator of the freezing chamber is avoided, more targeted adjustment is realized, and the accumulated operation time of the compressor in the operation period is more matched with the actual working condition of the refrigerator.
The invention realizes that when the frost amount is small, the defrosting interval is adjusted to be long, so that the accumulated running time of the compressor in the running period is more matched with the actual working condition of the refrigerator, and the energy consumption of the refrigerator is correspondingly reduced.
During the defrosting of the freezing chamber, the refrigerating chamber can not be refrigerated because the compressor stops running; at the moment, the refrigerating fan is turned on, natural defrosting of the refrigerating chamber evaporator is realized through air flow circulation in the refrigerating chamber, the time that the refrigerating chamber cannot be refrigerated objectively is fully utilized, the defrosting task during normal refrigerating of the refrigerating chamber is reduced, and the heat exchange efficiency of the refrigerating chamber evaporator is improved due to reduction of the frost amount during normal refrigerating. The condition h can avoid starting defrosting when defrosting is not needed, and the condition i can immediately quit defrosting after the temperature reaches a specific value (the temperature condition at the moment can automatically ensure the realization of the defrosting target without starting the fan), thereby not only avoiding the useless work of the refrigerating fan, but also avoiding the phenomenon that defrosting can not be quitted for a long time; the time condition of 30 minutes can meet the defrosting requirement of the refrigerating chamber in most cases.
The condition e can reduce the phenomenon that the defrosting electric heater of the temperature-variable chamber is continuously started after the defrosting is finished, and also reduces the energy waste. The condition f can avoid the situation that defrosting cannot be quitted.
Detailed Description
The invention relates to a three-cycle air-cooled refrigerator, which comprises a box body with a refrigerating chamber, a variable-temperature fixing chamber and a refrigerating chamber, wherein an electric control device and a refrigerating system are arranged in the box body, and the refrigerating system comprises a compressor, a condenser, an expansion valve and an evaporator which are circularly connected through a refrigerant pipeline in sequence along the flow direction of a refrigerant; a refrigerating door switch is arranged at the door body of the refrigerating chamber, a freezing door switch is arranged at the door body of the freezing chamber, and a variable temperature door switch is arranged at the door body of the variable temperature chamber; the refrigerating chamber is correspondingly provided with a refrigerating fan, the temperature-changing chamber is correspondingly provided with a temperature-changing fan, and the freezing chamber is correspondingly provided with a freezing fan; a freezing chamber temperature sensor for detecting the temperature in the freezing chamber is arranged in the freezing chamber; the freezing chamber evaporator is provided with a freezing chamber defrosting electric heater; a variable-temperature-chamber defrosting electric heater is arranged at the variable-temperature-chamber evaporator; a refrigerant pipeline between the compressor and each evaporator is provided with a two-position four-way electromagnetic valve, and an air suction port of the compressor is selectively communicated with a freezing chamber evaporator or a refrigerating chamber evaporator or a temperature-changing chamber evaporator through the two-position four-way electromagnetic valve;
a compressor running timer, a temperature-changing defrosting timer and a freezing defrosting timer are arranged in the electric control device; the arrangement of each timer and sensor provides a data basis for accurate control.
The electric control device is internally stored with a refrigerating fan operation target time parameter LCFSJ and a refrigerating evaporation temperature sensor target temperature parameter TFCTE; a real-time temperature parameter CTHS detected by a refrigeration evaporation temperature sensor; an actual refrigerating time parameter LCSJ of the refrigerating chamber, a refrigerating target time parameter LCCS of the refrigerating chamber, a compressor accumulative operation conventional time parameter LJT, a compressor accumulative operation long time parameter LJTD, a compressor accumulative operation short time parameter LJTX, a falling temperature parameter TLD of a freezing chamber before defrosting, a refrigerating time TYL of the freezing chamber before defrosting, a real-time temperature parameter THS detected by a freezing and evaporating temperature sensor and a freezing and defrosting duration parameter HST recorded by a freezing and defrosting timer; the method comprises the following steps of (1) freezing and defrosting starting temperature parameter TDFT, defrosting regular time DJRT1, defrosting long time DJRT2, accumulated door opening times KMCS of a freezing chamber in an operation period, accumulated door opening time KMSJT of the freezing chamber in an operation period, a real-time temperature parameter FTHS detected by a variable-temperature evaporation temperature sensor, a variable-temperature evaporator defrosting control temperature parameter TFFTE, a variable-temperature defrosting time parameter FHST counted by a variable-temperature defrosting timer and a freezing chamber preset temperature parameter TLDY; the value of the preset freezer temperature parameter TLDY is typically-12 ℃ to-20 ℃, with-18 ℃ being most widely used.
The units of the compressor accumulative operation conventional time parameter LJT, the compressor accumulative operation long time parameter LJTD and the compressor accumulative operation short time parameter LJTX are all hours;
the unit of the refrigerating fan operation target time parameter LCFSJ, the refrigerating time TYL of a refrigerating chamber before defrosting, the freezing and defrosting duration parameter HST recorded by a freezing and defrosting timer, the defrosting conventional time DJRT1, the defrosting long time DJRT2, the freezing chamber door opening accumulated time KMSJT in one operation period and the temperature-changing defrosting time parameter FHST are all minutes;
the units of a target temperature parameter TFCTE of a refrigeration evaporation temperature sensor, a real-time temperature parameter CTHS detected by the refrigeration evaporation temperature sensor, a falling temperature parameter TLD of a freezing chamber before defrosting, a real-time temperature parameter THS detected by a freezing and defrosting sensor, a freezing and defrosting starting temperature parameter TDFT, a real-time temperature parameter FTHS detected by a variable-temperature evaporation temperature sensor and a defrosting control temperature parameter TFFTE of a variable-temperature evaporator are respectively;
the units of the accumulated door opening times KMCS of the freezing chamber, the refrigeration target time parameter LCCS of the refrigerating chamber and the actual refrigeration time parameter LCSJ of the refrigerating chamber in one operation period are all times;
the compressor, the refrigeration fan, the freezing evaporation temperature sensor for detecting the temperature of the freezing chamber evaporator, the refrigeration evaporation temperature sensor for detecting the temperature of the freezing chamber evaporator, the variable temperature evaporation temperature sensor for detecting the temperature of the variable temperature chamber evaporator, the freezing chamber temperature sensor for detecting the temperature in the freezing chamber, the refrigeration door switch, the freezing door switch and the variable temperature door switch are respectively connected with the electric control device.
The value range of the compressor accumulative operation conventional time parameter LJT is as follows: LJT is more than or equal to 7 and less than or equal to 7.5 (hours); the value range of the long-time accumulated operation parameter LJTD of the compressor is as follows: LJTD is more than or equal to 15 and less than or equal to 30 (hours); the value range of the compressor accumulated operation short-time parameter LJTX is as follows: LJTX is more than or equal to 4 and less than or equal to 5 (hours); the value range of the falling temperature parameter TLD of the freezing chamber before defrosting is as follows: TLD is more than or equal to 1 and less than or equal to 3 (DEG C); the value range of the refrigerating time TYL of the freezing chamber before defrosting is as follows: TYL is more than or equal to 50 and less than or equal to 80 (minutes); the value range of the freezing defrosting starting temperature parameter TDFT is as follows: TDFT is more than or equal to 6 and less than or equal to 13 (DEG C); the defrosting regular time DJRT1 has the following value ranges: DJRT1 is more than or equal to 16 and less than or equal to 25 (minutes); the value range of the defrosting long time DJRT2 is as follows: DJRT2 is more than or equal to 26 and less than or equal to 39 (minutes); the value range of the accumulated door opening times KMCS of the freezing chamber in one operation period is as follows: KMCS is more than or equal to 3 and less than or equal to 6 (times); the value range of the door opening accumulated time KMSJT of the freezing chamber in one operation period is as follows: KMSJT is more than or equal to 3 and less than or equal to 15 (minutes); the value range of the variable temperature evaporator defrosting control temperature parameter TFFTE is as follows: TFFTE is more than or equal to 6 and less than or equal to 13 (DEG C); the value range of the refrigerating target frequency parameter LCCS of the refrigerating chamber is more than or equal to 10 and less than or equal to 20 (times); the value range of the target temperature parameter TFCTE of the refrigerated evaporation temperature sensor is that TFCTE is more than or equal to 6 and less than or equal to 13 (DEG C); the value range of the target time parameter LCFSJ of the operation of the refrigerating fan is more than or equal to 20 and less than or equal to 40 minutes. The parameter values in the section are preset in the electric control device of the refrigerator by designers according to the model and the design target of the refrigerator after the specific values in a selected range before delivery. The freezing door switch, the refrigerating door switch and the variable-temperature door switch provide the opening and closing times of each door in one operation period for the electric control device.
The invention also provides a defrosting method of the three-cycle air-cooled refrigerator; the method comprises the following steps that a freezing chamber evaporator of the three-cycle air-cooled refrigerator carries out interval defrosting in the running process, and an operation period is from the last time of defrosting of the freezing chamber evaporator to the end of defrosting of the freezing chamber evaporator; when an operation period starts, a compressor operation timer counts the accumulated operation time of the compressor in the period from zero;
the defrosting method comprises a freezing chamber defrosting method;
the freezing chamber defrosting method includes first to fifth steps;
the first step is to enter defrosting preparation;
after the three-cycle air-cooled refrigerator is powered on and started or after an operation period begins, the electric control device continuously collects data of a compressor operation timer, the accumulated operation time of the compressor in the operation period is compared with the set operation time of the compressor, and when the accumulated operation time of the compressor in the operation period reaches the set operation time of the compressor, a defrosting preparation step is carried out;
the second step is defrosting preparation; the method comprises the following steps that an electric control device adjusts the original preset temperature parameter TLDY of a freezing chamber downwards to TLD ℃; entering a third step when at least one of the following two conditions a and b is satisfied:
the condition a is that the temperature detected by the freezing chamber temperature sensor is lower than or equal to TLDY-TLD ℃;
the condition b is that the time after the electric control device adjusts the original preset temperature parameter TLDY of the freezing chamber to TLD ℃ down reaches TYL minutes;
before defrosting, the electric control device reduces TLD ℃ of the original set temperature of the freezing chamber to be lower than the original set value, the temperature rise of the freezing chamber in the defrosting process is responded in advance, the temperature of the freezing chamber in the defrosting process is lower, the temperature of the freezing chamber in the defrosting process is smaller than the temperature of the normal freezing chamber in the defrosting process, and the influence of the defrosting process on the quality of food in the freezing chamber is smaller. And the condition b can ensure that the defrosting step is timely carried out when the temperature of the freezing chamber is difficult to be reduced to TLDY-TLD ℃ due to the reason that the frost layer is thick and the like.
The third step is to enter defrosting;
when the real-time temperature parameter THS detected by the freezing and evaporating temperature sensor is less than or equal to the freezing and defrosting starting temperature parameter TDFT-3 ℃, entering a defrosting step; the condition can prevent the defrosting from entering when the defrosting is not needed (when the temperature of the evaporator of the freezing chamber is higher).
The fourth step is a defrosting step;
the method comprises the following steps that an electric control device closes a compressor, simultaneously opens a freezing chamber defrosting electric heater and controls a freezing defrosting timer to start timing from zero, and the electric control device records freezing chamber defrosting duration time in a freezing defrosting duration time parameter HST;
entering a fifth step when at least one of the following two conditions c and d is satisfied after the electric heater for defrosting the freezing chamber starts;
the condition c is that the real-time temperature parameter THS detected by the freezing and evaporating temperature sensor is greater than the freezing and defrosting start temperature parameter TDFT, and the temperature of the evaporator of the freezing chamber is high enough.
Condition d is a freeze thaw duration parameter HST > 40 minutes;
the fifth step is to quit the defrosting step;
the electric control device resets the compressor running timer and executes the first step again;
circularly executing the first step to the fifth step until the three-circulation air-cooled refrigerator is closed;
the condition c can timely quit defrosting when the temperature of the evaporator of the freezing chamber is high enough, and the condition d can prevent the condition that defrosting can not be quitted.
In the first step, the set compressor running time is a compressor accumulative running conventional time parameter LJT, a compressor accumulative running long time parameter LJTD or a compressor accumulative running short time parameter LJTX;
when the operation period is the first operation period after the three-cycle air-cooled refrigerator is powered on, the electric control device takes the accumulated operation conventional time parameter LJT of the compressor as the set operation time length of the compressor;
when the running period is not the first running period after the three-cycle air-cooled refrigerator is powered on, the electric control device compares a freezing and defrosting duration time parameter HST (namely the number of minutes of defrosting of the evaporator of the freezing chamber in the last running period) in the last running period with defrosting conventional time DJRT1 and defrosting long time DJRT2 and 40 minutes;
when the freezing defrosting duration parameter HST in the previous operation period meets the condition that DJRT1 minutes is not more than HST and is less than DJRT2 minutes, the electric control device takes the accumulated operation conventional time parameter LJT of the compressor as the operation time length of the compressor set in the operation period; the duration of the freezing defrosting in the last operation cycle is not long or short, which indicates that the frost quantity is moderate, and the operation time of the compressor is a conventional value.
When the freezing defrosting duration parameter HST in the previous operation period meets the condition that DJRT2 is not less than HST and less than 40 minutes (because defrosting is quitted when 40 minutes are reached, HST is necessarily less than 40 minutes), the electric control device takes the compressor accumulated operation short-time parameter LJTX as the compressor operation time set in the operation period; when the last defrosting time is longer, the frost amount is indicated to be excessive, and the accumulated operation time of the compressor in the operation period is shortened, so that excessive frosting of the evaporator of the freezing chamber is avoided, more targeted adjustment is realized, and the accumulated operation time of the compressor in the operation period is more matched with the actual working condition of the refrigerator.
When the freezing defrosting duration parameter HST in the previous running period meets HST < DJRT1 (minutes) (namely the last defrosting time is shorter than the defrosting regular time DJRT1, namely stopping, the amount of frost generated in the running of the refrigerator is small), the electric control device takes the compressor accumulated running long-time parameter LJTD as the running time length of the compressor set in the running period. Therefore, when the amount of frost is small, the defrosting interval is adjusted to be long, the accumulated running time of the compressor in the running period is matched with the actual working condition of the refrigerator, and the energy consumption of the refrigerator is correspondingly reduced.
The suction port of the compressor selects the time interval communicated with the evaporator of the refrigerating chamber as the refrigerating time interval of the refrigerating chamber through the two-position four-way electromagnetic valve; when an operation period begins, resetting an actual refrigerating time parameter LCSJ of a refrigerating chamber; during normal operation of the refrigerator, the refrigerating chamber is refrigerated according to the temperature requirement of the refrigerating chamber, and the actual refrigerating time parameter LCSJ parameter of the refrigerating chamber is added with 1 every time the air suction port of the compressor is communicated with the evaporator of the refrigerating chamber;
the defrosting method also comprises a refrigerating chamber defrosting method;
the refrigerating chamber defrosting method comprises a defrosting method after the freezing chamber defrosting is finished and a defrosting method during the freezing chamber defrosting;
the defrosting method after the defrosting of the freezing chamber is as follows: when the actual refrigerating time parameter LCSJ of the refrigerating chamber is an integral multiple of the refrigerating target time parameter LCCS of the refrigerating chamber, after delaying for 20 minutes after the two-position four-way electromagnetic valve disconnects the air suction port of the compressor from the evaporator of the refrigerating chamber, the electric control device judges whether the condition h is met, if the condition h is met, the electric control device starts the refrigerating fan to start refrigerating chamber defrosting, and closes the refrigerating fan when the condition i is met so as to finish the refrigerating chamber defrosting;
the condition h is: the real-time temperature parameter CTHS detected by the refrigeration evaporation temperature sensor is less than or equal to the target temperature parameter TFCTE-1 ℃ of the refrigeration evaporation temperature sensor;
the condition i is: the starting time of the refrigerating fan reaches 30 minutes or a real-time temperature parameter CTHS detected by a refrigerating evaporation temperature sensor is more than or equal to a target temperature parameter TFCTE of the refrigerating evaporation temperature sensor;
the defrosting method during the defrosting of the freezing chamber comprises the following steps:
the electric control device starts the electric heater for defrosting in the freezing chamber and simultaneously starts the refrigeration fan; and (4) after the refrigerating fan operates for LCFSJ minutes or CTHS is larger than or equal to TFCTE, closing the refrigerating fan, and finishing the defrosting of the refrigerating chamber.
During the defrosting of the freezing chamber, the refrigerating chamber can not be refrigerated because the compressor stops running; at the moment, the refrigerating fan is turned on, natural defrosting of the refrigerating chamber evaporator is realized through air flow circulation in the refrigerating chamber, the time that the refrigerating chamber cannot be refrigerated objectively is fully utilized, the defrosting task during normal refrigerating of the refrigerating chamber is reduced, and the heat exchange efficiency of the refrigerating chamber evaporator is improved due to reduction of the frost amount during normal refrigerating. The condition h can avoid starting defrosting when defrosting is not needed, and the condition i can immediately quit defrosting after the temperature reaches a specific value (the temperature condition at the moment can automatically ensure the realization of the defrosting target without starting the fan), thereby not only avoiding the useless work of the refrigerating fan, but also avoiding the phenomenon that defrosting can not be quitted for a long time; the time condition of 30 minutes can meet the defrosting requirement of the refrigerating chamber in most cases.
The defrosting method also comprises a variable-temperature chamber defrosting method; the defrosting method of the temperature-variable chamber comprises the following steps:
firstly, a starting method of defrosting of a temperature-variable chamber;
the electric control device judges whether a real-time temperature parameter FTHS detected by the variable-temperature evaporation temperature sensor is less than or equal to a variable-temperature defrosting starting temperature parameter TFFTE-3 ℃ or not while starting the electric defrosting heater of the freezing chamber, and if so, the electric defrosting heater of the variable-temperature chamber is started to defrost the evaporator of the variable-temperature chamber;
secondly, stopping the defrosting of the temperature-variable chamber;
the method for stopping defrosting of the temperature-variable chamber comprises the following steps: when at least one of the following two conditions of e and f is met, the electric control device turns off the temperature-variable chamber defrosting electric heater;
the condition e is that the real-time temperature parameter FTHS detected by the variable-temperature evaporation temperature sensor is larger than a variable-temperature evaporator defrosting control temperature parameter TFFTE;
the condition f is that the temperature-changing defrosting time parameter FHST is more than or equal to 40 (minutes);
the condition e can reduce the phenomenon that the defrosting electric heater of the temperature-variable chamber is continuously started after the defrosting is finished, and also reduces the energy waste. The condition f can avoid the situation that defrosting cannot be quitted.
In the refrigerating chamber defrosting method, when the defrosting method after the defrosting of the freezing chamber is finished is carried out, if the electric control device receives a request for enabling the two-position four-way electromagnetic valve to select to communicate the air suction port of the compressor and the refrigerating chamber evaporator, the refrigerating chamber defrosting process is continued unchanged, and the request is not responded;
in the refrigerating chamber defrosting method, the entry condition of the defrosting of the freezing chamber is out of the condition h, the condition j is also included, and when the condition h and the condition j are simultaneously met, the electric control device starts the refrigerating fan; the condition j is: the refrigeration compartment is not operated in the quick cooling mode.
In the defrosting process of the refrigerating chamber, the electric control device normally controls the start and stop of the compressor and ensures that the two-position four-way electromagnetic valve cuts off the connection between the air suction port of the compressor and the evaporator of the refrigerating chamber.
In the present invention, the condition is satisfied, that is, the condition is true.
In the present invention, the expression "perform the operation C" when a or B is satisfied means not only that the operation C is performed when a is satisfied and B is satisfied, but also that the operation C is performed when a and B are satisfied simultaneously.
If the expression "when A and or B" is used, then the following ambiguity applies: the C is carried out when the A and the B are carried out, and the C is carried out when the A or the B is carried out. Therefore, the expression "when A and or B are used" is not used for C.
Naturally, when a and B are established simultaneously, "a is established" or "B is established".
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 (4)
1. The defrosting method of the three-cycle air-cooled refrigerator is characterized by comprising the following steps: the three-cycle air-cooled refrigerator comprises a box body with a refrigerating chamber, a variable-temperature fixing chamber and a refrigerating chamber, wherein an electric control device and a refrigerating system are arranged in the box body, the refrigerating system comprises a compressor, a condenser, an expansion valve and an evaporator which are circularly connected in sequence through a refrigerant pipeline, the evaporator comprises a refrigerating chamber evaporator, a refrigerating chamber evaporator and a variable-temperature chamber evaporator, a freezing evaporation temperature sensor is arranged at the refrigerating chamber evaporator, a refrigerating evaporation temperature sensor is arranged at the refrigerating chamber evaporator, and a variable-temperature evaporation temperature sensor is arranged at the variable-temperature chamber evaporator; a refrigerating door switch is arranged at the door body of the refrigerating chamber, a freezing door switch is arranged at the door body of the freezing chamber, and a variable temperature door switch is arranged at the door body of the variable temperature chamber; the refrigerating chamber is correspondingly provided with a refrigerating fan, the temperature-changing chamber is correspondingly provided with a temperature-changing fan, and the freezing chamber is correspondingly provided with a freezing fan; a freezing chamber temperature sensor for detecting the temperature in the freezing chamber is arranged in the freezing chamber; the freezing chamber evaporator is provided with a freezing chamber defrosting electric heater; a variable-temperature-chamber defrosting electric heater is arranged at the variable-temperature-chamber evaporator; a refrigerant pipeline between the compressor and each evaporator is provided with a two-position four-way electromagnetic valve, and an air suction port of the compressor is selectively communicated with a freezing chamber evaporator or a refrigerating chamber evaporator or a temperature-changing chamber evaporator through the two-position four-way electromagnetic valve;
a compressor running timer, a temperature-changing defrosting timer and a freezing defrosting timer are arranged in the electric control device;
the electric control device is internally stored with a refrigerating fan operation target time parameter LCFSJ and a refrigerating evaporation temperature sensor target temperature parameter TFCTE; a real-time temperature parameter CTHS detected by a refrigeration evaporation temperature sensor; an actual refrigerating time parameter LCSJ of the refrigerating chamber, a refrigerating target time parameter LCCS of the refrigerating chamber, a compressor accumulative operation conventional time parameter LJT, a compressor accumulative operation long time parameter LJTD, a compressor accumulative operation short time parameter LJTX, a falling temperature parameter TLD of a freezing chamber before defrosting, a refrigerating time TYL of the freezing chamber before defrosting, a real-time temperature parameter THS detected by a freezing and evaporating temperature sensor and a freezing and defrosting duration parameter HST recorded by a freezing and defrosting timer; the method comprises the following steps of (1) freezing and defrosting starting temperature parameter TDFT, defrosting regular time DJRT1, defrosting long time DJRT2, accumulated door opening times KMCS of a freezing chamber in an operation period, accumulated door opening time KMSJT of the freezing chamber in an operation period, a real-time temperature parameter FTHS detected by a variable-temperature evaporation temperature sensor, a variable-temperature evaporator defrosting control temperature parameter TFFTE, a variable-temperature defrosting time parameter FHST counted by a variable-temperature defrosting timer and a freezing chamber preset temperature parameter TLDY;
the units of the compressor accumulative operation conventional time parameter LJT, the compressor accumulative operation long time parameter LJTD and the compressor accumulative operation short time parameter LJTX are all hours;
the unit of the refrigerating fan operation target time parameter LCFSJ, the refrigerating time TYL of a refrigerating chamber before defrosting, the freezing and defrosting duration parameter HST recorded by a freezing and defrosting timer, the defrosting conventional time DJRT1, the defrosting long time DJRT2, the freezing chamber door opening accumulated time KMSJT in one operation period and the temperature-changing defrosting time parameter FHST are all minutes;
the units of a target temperature parameter TFCTE of a refrigeration evaporation temperature sensor, a real-time temperature parameter CTHS detected by the refrigeration evaporation temperature sensor, a falling temperature parameter TLD of a freezing chamber before defrosting, a real-time temperature parameter THS detected by a freezing and defrosting sensor, a freezing and defrosting starting temperature parameter TDFT, a real-time temperature parameter FTHS detected by a variable-temperature evaporation temperature sensor and a defrosting control temperature parameter TFFTE of a variable-temperature evaporator are respectively;
the units of the accumulated door opening times KMCS of the freezing chamber, the refrigeration target time parameter LCCS of the refrigerating chamber and the actual refrigeration time parameter LCSJ of the refrigerating chamber in one operation period are all times;
the compressor, the refrigeration fan, the variable temperature fan, the freezing and evaporating temperature sensor for detecting the temperature of the freezing chamber evaporator, the refrigeration and evaporating temperature sensor for detecting the temperature of the refrigerating chamber evaporator, the variable temperature evaporating temperature sensor for detecting the temperature of the variable temperature chamber evaporator, the freezing chamber temperature sensor for detecting the temperature in the freezing chamber, the refrigeration door switch, the freezing door switch and the variable temperature door switch are respectively connected with the electric control device;
the value range of the compressor accumulative operation conventional time parameter LJT is as follows: LJT is more than or equal to 7 and less than or equal to 7.5; the value range of the long-time accumulated operation parameter LJTD of the compressor is as follows: LJTD is more than or equal to 15 and less than or equal to 30; the value range of the compressor accumulated operation short-time parameter LJTX is as follows: LJTX is more than or equal to 4 and less than or equal to 5; the value range of the falling temperature parameter TLD of the freezing chamber before defrosting is as follows: TLD is more than or equal to 1 and less than or equal to 3; the value range of the refrigerating time TYL of the freezing chamber before defrosting is as follows: TYL is more than or equal to 50 and less than or equal to 80; the value range of the freezing defrosting starting temperature parameter TDFT is as follows: TDFT is more than or equal to 6 and less than or equal to 13; the defrosting regular time DJRT1 has the following value ranges: DJRT1 is more than or equal to 16 and less than or equal to 25; the value range of the defrosting long time DJRT2 is as follows: DJRT2 is more than or equal to 26 and less than or equal to 39; the value range of the accumulated door opening times KMCS of the freezing chamber in one operation period is as follows: KMCS is more than or equal to 3 and less than or equal to 6; the value range of the door opening accumulated time KMSJT of the freezing chamber in one operation period is as follows: KMSJT is more than or equal to 3 and less than or equal to 15; the value range of the variable temperature evaporator defrosting control temperature parameter TFFTE is as follows: TFFTE is more than or equal to 6 and less than or equal to 13; the value range of the refrigerating target frequency parameter LCCS of the refrigerating chamber is more than or equal to 10 and less than or equal to 20; the value range of the target temperature parameter TFCTE of the refrigerated evaporation temperature sensor is more than or equal to 6 and less than or equal to 13; the value range of the refrigeration fan operation target time parameter LCFSJ is more than or equal to 20 and less than or equal to 40;
the method comprises the following steps that a freezing chamber evaporator of the three-cycle air-cooled refrigerator carries out interval defrosting in the running process, and an operation period is from the last time of defrosting of the freezing chamber evaporator to the end of defrosting of the freezing chamber evaporator; when an operation period starts, a compressor operation timer counts the accumulated operation time of the compressor in the period from zero;
the defrosting method comprises a freezing chamber defrosting method;
the freezing chamber defrosting method includes first to fifth steps;
the first step is to enter defrosting preparation;
after the three-cycle air-cooled refrigerator is powered on and started or after an operation period begins, the electric control device continuously collects data of a compressor operation timer, the accumulated operation time of the compressor in the operation period is compared with the set operation time of the compressor, and when the accumulated operation time of the compressor in the operation period reaches the set operation time of the compressor, a defrosting preparation step is carried out;
the second step is defrosting preparation; the method comprises the following steps that an electric control device adjusts the original preset temperature parameter TLDY of a freezing chamber downwards to TLD ℃; entering a third step when at least one of the following two conditions a and b is satisfied:
the condition a is that the temperature detected by the freezing chamber temperature sensor is lower than or equal to TLDY-TLD ℃;
the condition b is that the time after the electric control device adjusts the original preset temperature parameter TLDY of the freezing chamber to TLD ℃ down reaches TYL minutes;
the third step is to enter defrosting;
when the real-time temperature parameter THS detected by the freezing and evaporating temperature sensor is less than or equal to the freezing and defrosting starting temperature parameter TDFT-3 ℃, entering a defrosting step;
the fourth step is a defrosting step;
the method comprises the following steps that an electric control device closes a compressor, simultaneously opens a freezing chamber defrosting electric heater and controls a freezing defrosting timer to start timing from zero, and the electric control device records freezing chamber defrosting duration time in a freezing defrosting duration time parameter HST;
entering a fifth step when at least one of the following two conditions c and d is satisfied after the electric heater for defrosting the freezing chamber starts;
the condition c is that the real-time temperature parameter THS detected by the freezing and evaporating temperature sensor is more than the freezing defrosting starting temperature parameter TDFT;
condition d is a freeze thaw duration parameter HST > 40 minutes;
the fifth step is to quit the defrosting step;
the electric control device resets the compressor running timer and executes the first step again;
circularly executing the first step to the fifth step until the three-circulation air-cooled refrigerator is closed;
in the first step, the set compressor running time is a compressor accumulative running conventional time parameter LJT, a compressor accumulative running long time parameter LJTD or a compressor accumulative running short time parameter LJTX;
when the operation period is the first operation period after the three-cycle air-cooled refrigerator is powered on, the electric control device takes the accumulated operation conventional time parameter LJT of the compressor as the set operation time length of the compressor;
when the running period is not the first running period after the three-cycle air-cooled refrigerator is powered on, the electric control device compares the freezing and defrosting duration time parameter HST in the last running period with the defrosting conventional time DJRT1 and the defrosting long time DJRT2 and 40 minutes;
when the freezing defrosting duration parameter HST in the previous operation period meets the condition that DJRT1 minutes is not more than HST and is less than DJRT2 minutes, the electric control device takes the accumulated operation conventional time parameter LJT of the compressor as the set operation time length of the compressor;
when the freezing defrosting duration parameter HST in the previous operation period meets the condition that DJRT2 is not more than HST minutes, the electric control device takes the compressor accumulated operation short time parameter LJTX as the set compressor operation time length;
and when the freezing defrosting duration parameter HST in the previous operation period meets the condition that HST is less than DJRT1, the electric control device takes the accumulated operation long-time parameter LJTD of the compressor as the set operation time of the compressor.
2. The defrosting method according to claim 1, characterized in that:
the suction port of the compressor selects the time interval communicated with the evaporator of the refrigerating chamber as the refrigerating time interval of the refrigerating chamber through the two-position four-way electromagnetic valve; when an operation period begins, resetting an actual refrigerating time parameter LCSJ of a refrigerating chamber; adding 1 to the LCSJ parameter of the actual refrigeration time parameter of the refrigerating chamber every time the air suction port of the compressor is communicated with the evaporator of the refrigerating chamber;
the defrosting method also comprises a refrigerating chamber defrosting method;
the refrigerating chamber defrosting method comprises a defrosting method after the freezing chamber defrosting is finished and a defrosting method during the freezing chamber defrosting;
the defrosting method after the defrosting of the freezing chamber is as follows: when the actual refrigerating time parameter LCSJ of the refrigerating chamber is an integral multiple of the refrigerating target time parameter LCCS of the refrigerating chamber, after delaying for 20 minutes after the two-position four-way electromagnetic valve disconnects the air suction port of the compressor from the evaporator of the refrigerating chamber, the electric control device judges whether the condition h is met, if the condition h is met, the electric control device starts the refrigerating fan to start refrigerating chamber defrosting, and closes the refrigerating fan when the condition i is met so as to finish the refrigerating chamber defrosting;
the condition h is: the real-time temperature parameter CTHS detected by the refrigeration evaporation temperature sensor is less than or equal to the target temperature parameter TFCTE-1 ℃ of the refrigeration evaporation temperature sensor;
the condition i is: the starting time of the refrigerating fan reaches 30 minutes or a real-time temperature parameter CTHS detected by a refrigerating evaporation temperature sensor is more than or equal to a target temperature parameter TFCTE of the refrigerating evaporation temperature sensor;
the defrosting method during the defrosting of the freezing chamber comprises the following steps:
the electric control device starts the electric heater for defrosting in the freezing chamber and simultaneously starts the refrigeration fan; and (4) after the refrigerating fan operates for LCFSJ minutes or CTHS is larger than or equal to TFCTE, closing the refrigerating fan, and finishing the defrosting of the refrigerating chamber.
3. The defrosting method according to claim 1, characterized in that:
the defrosting method also comprises a variable-temperature chamber defrosting method; the defrosting method of the temperature-variable chamber comprises the following steps:
firstly, a starting method of defrosting of a temperature-variable chamber;
the electric control device judges whether a real-time temperature parameter FTHS detected by the variable-temperature evaporation temperature sensor is less than or equal to a variable-temperature defrosting starting temperature parameter TFFTE-3 ℃ or not while starting the electric defrosting heater of the freezing chamber, and if so, the electric defrosting heater of the variable-temperature chamber is started to defrost the evaporator of the variable-temperature chamber;
secondly, stopping the defrosting of the temperature-variable chamber;
the method for stopping defrosting of the temperature-variable chamber comprises the following steps: when at least one of the following two conditions of e and f is met, the electric control device turns off the temperature-variable chamber defrosting electric heater;
the condition e is that the real-time temperature parameter FTHS detected by the variable-temperature evaporation temperature sensor is larger than a variable-temperature evaporator defrosting control temperature parameter TFFTE;
the condition f is that the temperature-changing defrosting time parameter FHST is more than or equal to 40.
4. The defrosting method according to claim 2, characterized in that:
in the refrigerating chamber defrosting method, when the defrosting method after the defrosting of the freezing chamber is finished is carried out, if the electric control device receives a request for enabling the two-position four-way electromagnetic valve to select to communicate the air suction port of the compressor and the refrigerating chamber evaporator, the refrigerating chamber defrosting process is continued unchanged, and the request is not responded;
in the refrigerating chamber defrosting method, the entry condition of the defrosting of the freezing chamber is out of the condition h, the condition j is also included, and when the condition h and the condition j are simultaneously met, the electric control device starts the refrigerating fan; the condition j is: the refrigeration compartment is not operated in the quick cooling mode.
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| CN110701866B (en) * | 2019-11-20 | 2022-02-01 | 合肥晶弘电器有限公司 | Defrosting control method of refrigerator and refrigerator |
| CN111351308B (en) * | 2020-03-11 | 2021-10-15 | 合肥美的电冰箱有限公司 | Refrigeration equipment, control method and control device for defrosting refrigeration equipment and storage medium |
| CN113790571B (en) * | 2021-09-06 | 2022-05-20 | 珠海格力电器股份有限公司 | Fan control method of heat exchanger, refrigeration equipment and computer readable storage medium |
| CN113932560B (en) * | 2021-11-18 | 2023-06-06 | 河南新飞制冷器具有限公司 | Defrosting method of series-parallel double-system air-cooled refrigerator |
| CN115031469A (en) * | 2022-04-25 | 2022-09-09 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting control method thereof |
| CN114992972B (en) * | 2022-05-25 | 2024-04-05 | 河南新飞制冷器具有限公司 | Defrosting control method for air-cooled refrigerator |
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| GB605192A (en) * | 1944-05-30 | 1948-07-19 | Philco Radio & Television Corp | Improvements in refrigeration apparatus |
| CN1312452C (en) * | 2004-05-09 | 2007-04-25 | 广东科龙电器股份有限公司 | Multi-circulation refrigerator with circulation fan and separated refrigeration and freezing compartment |
| CN104833167A (en) * | 2015-02-27 | 2015-08-12 | 河南新飞电器有限公司 | Air cooling refrigerator defrosting method |
| CN105674669B (en) * | 2016-02-02 | 2017-10-27 | 河南新飞电器有限公司 | A kind of defrosting method of dual system wind cooling refrigerator |
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