CN113048717B

CN113048717B - Refrigeration control method and refrigerator

Info

Publication number: CN113048717B
Application number: CN201911384352.0A
Authority: CN
Inventors: 李春阳; 冯俊田; 艾景海; 徐同
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2022-11-22
Anticipated expiration: 2039-12-28
Also published as: CN113048717A

Abstract

The invention provides a refrigerator and a refrigeration control method, comprising the following steps: step S1: comparing the real-time temperature of the freezing chamber of the refrigerator with the starting point temperature of the freezing chamber, judging whether the freezing chamber needs to be refrigerated or not, and if so, executing the step S2; step S2: starting a compressor, a freezing chamber evaporator and a freezing chamber fan of the refrigerator to refrigerate the freezing chamber, and recording the starting time of the freezing chamber fan; and step S3: comparing the real-time temperature of the refrigerating chamber of the refrigerator with the starting point temperature of the refrigerating chamber, judging whether the refrigerating chamber needs to be refrigerated or not, and if so, executing a step S4; and step S4: comparing the difference value between the starting point temperature of the freezing chamber and the real-time temperature of the evaporator of the freezing chamber, and judging whether the difference value is smaller than a first preset interval or not; if yes, executing step S5; if not, step S6 is executed.

Description

Refrigeration control method and refrigerator

Technical Field

The invention relates to the technical field of refrigeration, in particular to a refrigerator and a refrigeration control method thereof.

Background

The air-cooled refrigerator of present double evaporator, its characteristics lie in: a set of refrigerating system is respectively arranged in the freezing chamber and the refrigerating chamber, the freezing chamber evaporator provides cold for the freezing chamber, and the refrigerating chamber evaporator provides cold for the refrigerating chamber. Generally, the refrigerating chamber and the freezing chamber need to be refrigerated simultaneously, the refrigerant in the refrigerating system cannot be uniformly distributed into the refrigerating chamber evaporator and the freezing chamber evaporator at the same time, when the refrigerating time of the refrigerating chamber is too long, the temperature of the freezing chamber rises more, and the real-time temperature fluctuation of the freezing chamber becomes larger.

Meanwhile, the refrigerant flowing out of the refrigerating chamber evaporator flows through the freezing chamber evaporator first, and is circulated to the compressor. Because the temperature difference of the temperature of freezer and walk-in is great, the refrigerant temperature that flows out from the walk-in evaporimeter is higher than the real-time temperature of freezer evaporimeter, causes the real-time temperature fluctuation of freezer evaporimeter big, and the real-time temperature of freezer is influenced, leads to the temperature fluctuation of freezer big, and it is very unfavorable to the edible material fresh-keeping of freezer.

Disclosure of Invention

Therefore, an object of the present invention is to provide a refrigeration control method for a refrigeration system of a dual-evaporator refrigerator, so as to overcome the problem of large temperature fluctuation of a freezing chamber of the dual-evaporator air-cooled refrigerator.

The invention provides a refrigeration control method of a refrigerator of a double-evaporator system, which comprises the following steps:

step S1: comparing the real-time temperature of the freezing chamber of the refrigerator with the starting point temperature of the freezing chamber, judging whether the freezing chamber needs to be refrigerated or not, and if so, executing the step S2;

step S2: starting a compressor, a freezing chamber evaporator and a freezing chamber fan of the refrigerator to refrigerate the freezing chamber, and recording the starting time of the freezing chamber fan;

and step S3: comparing the real-time temperature of the refrigerating chamber of the refrigerator with the starting point temperature of the refrigerating chamber, judging whether the refrigerating chamber needs to be refrigerated or not, and if so, executing a step S4;

and step S4: comparing the difference value between the starting point temperature of the freezing chamber and the real-time temperature of the evaporator of the freezing chamber, and judging whether the difference value is smaller than a first preset interval or not; if yes, executing step S5; if not, executing step S6;

the step S5 is to control only the refrigerating chamber evaporator, the refrigerating chamber fan and the freezing chamber fan to be started; step S6 is to judge whether the difference value is smaller than a second preset interval; if yes, executing step S7; and if not, executing the step S8 in the second preset interval.

As an optional technical solution, in the step S7, only the refrigerating chamber evaporator and the refrigerating chamber fan are controlled to be turned on, and the freezing chamber fan is controlled to be turned off.

As an optional technical solution, the temperature range of the first preset interval is 0 ℃ to 5 ℃, and the temperature range of the second preset interval is greater than the temperature range of the first preset interval.

As an optional technical solution, in step S3, if it is determined that refrigeration of the refrigerating chamber is not required, step S8 is performed, where step S8 includes controlling the opening of the freezing chamber evaporator and the freezing chamber fan.

As an optional technical solution, after the step S8, step S110 is executed; the step S110 is to continuously determine whether refrigeration is required for the freezing chamber; if yes, returning to the step S2; if not, the step S31 is executed.

As an optional technical solution, in the step S31, whether the refrigerating chamber needs to be refrigerated is continuously determined; if yes, returning to the step S4; if not, the step S9 is executed.

As an optional technical solution, the step S9 includes controlling the compressor, the freezing chamber fan and the refrigerating chamber fan to stop, recording a stop time of the freezing chamber fan, and further calculating a working time of the freezing chamber fan during operation of the compressor.

As an optional technical solution, the method further includes step S10, where in the step S10, it is determined whether the working time is less than the preset time range, and if so, the step S11 is executed; if not, the step S12 is executed.

As an optional technical solution, the step S11 is: decreasing the operating frequency of the compressor in the next refrigeration cycle; step S12 is to determine whether the working time is greater than the preset time range, if yes, step S13 is executed, and step S13 is: the operating frequency of the compressor is increased in the next refrigeration cycle.

As an optional technical solution, in the step S10, the working time is a minimum value smaller than the preset time range; in step S12, the working time is greater than the maximum value of the preset time range.

As an optional technical solution, the preset time range is 80min to 300min.

The invention also provides a refrigerator which comprises a refrigerating system, wherein the refrigerating system is used for refrigerating the refrigerating chamber and the freezing chamber of the refrigerator, and the refrigerating system is used for refrigerating the refrigerating chamber and the freezing chamber according to the refrigerating control method.

Compared with the prior art, in the refrigeration control method provided by the invention, before the refrigerating chamber is refrigerated, the difference between the real-time temperature of the evaporator in the refrigeration system and the starting point temperature of the refrigerating chamber is monitored, and when the difference is smaller than a first preset interval, the refrigerating chamber is refrigerated, namely, the refrigerating priority of the refrigerating chamber is controlled to be higher than that of the refrigerating chamber, so that the temperature fluctuation of the refrigerating chamber is kept small, and the food material fresh-keeping effect of the refrigerating chamber is better.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is a functional block diagram of a refrigerator of the present invention;

FIG. 2 is a functional block diagram of a refrigeration system of the refrigerator of the present invention;

fig. 3 is a flowchart illustrating a cooling control method of a cooling system of a refrigerator according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 is a functional block diagram of a refrigerator of the present invention; fig. 2 is a functional block diagram of a refrigerating system of a refrigerator according to the present invention.

As shown in fig. 1 and 2, the present invention provides a double-evaporator air-cooled refrigerator including a freezing chamber 1, a refrigerating chamber 2 disposed inside the refrigerator, and a refrigerating system including a freezing chamber evaporator 3 supplying cooling energy toward the freezing chamber 1 and a refrigerating evaporator 4 supplying cooling energy toward the refrigerating chamber 2.

The freezing chamber 1 is internally provided with a first temperature sensor 5 for acquiring the real-time temperature of the freezing chamber; a second temperature sensor 5 is arranged in the refrigerating chamber 2 to obtain the real-time temperature of the refrigerating chamber; a third temperature sensor 7 is arranged in the freezing chamber evaporator 3 to acquire the real-time temperature of the freezing chamber evaporator 3; a fourth temperature sensor 8 is provided in the refrigerating compartment evaporator 4 to obtain the real-time temperature of the refrigerating compartment evaporator 4.

This application corresponds freezer 1, is equipped with freezer start point temperature and freezer shutdown point temperature, compares freezer start point temperature with the real-time temperature of freezer judges whether need refrigerate freezer 1, wherein, if the real-time temperature of freezer is less than when the freezer start point temperature, need not refrigerate freezer 1; and if the real-time temperature of the freezing chamber is lower than the shutdown point temperature of the freezing chamber, the freezing chamber evaporator 3 and the freezing chamber fan can be controlled to stop. The freezing chamber shutdown point temperature is less than the freezing chamber startup point temperature, and the freezing chamber shutdown point temperature and the freezing chamber startup point temperature are respectively a certain value. For example, the freezing chamber shutdown point temperature is-19 ℃ and the freezing chamber startup point temperature is-18 ℃.

The freezer shutdown point temperature and the freezer startup point temperature may be used to avoid frequent turning on and/or off of a refrigeration system of the refrigerator.

Similarly, a refrigerating chamber starting point temperature and a refrigerating chamber stopping point temperature are arranged corresponding to the refrigerating chamber 2, and the refrigerating chamber starting point temperature and the refrigerating chamber real-time temperature are compared to judge whether the refrigerating chamber 2 needs to be refrigerated or not, wherein if the refrigerating chamber real-time temperature is lower than the refrigerating chamber starting point temperature, the refrigerating chamber 2 does not need to be refrigerated; and if the real-time temperature of the refrigerating chamber is lower than the shutdown point temperature of the refrigerating chamber, the refrigerating chamber evaporator 4 and the refrigerating chamber fan can be controlled to be shut down. The refrigerating chamber power-off point temperature is smaller than the refrigerating chamber power-on point temperature, and the refrigerating chamber power-off point temperature and the refrigerating chamber power-on point temperature are respectively a certain value. For example, the refrigerating chamber power-off point temperature is-1 ℃, and the freezing chamber power-on point temperature is 0 ℃.

The working process of the refrigerating system comprises that the compressor 11 is started, a low-temperature and low-pressure refrigerant is sucked by the compressor 11, and is compressed into high-temperature and high-temperature superheated gas in a cylinder of the compressor 11 and then discharged into the condenser 12; the high-temperature and high-temperature superheated gas is radiated by the condenser 12, the temperature is reduced, and the gas is gradually cooled to be saturated steam with normal temperature and high pressure and further cooled to be saturated liquid; the condensed refrigeration and saturated liquid are changed into normal-temperature low-pressure wet steam through the throttling of the capillary tube 13; then, under the control of the electromagnetic valve 10, one of the refrigerant enters the freezing chamber evaporator 3 and the refrigerating chamber evaporator 4, the heat in the freezing chamber evaporator 3 or the refrigerating chamber evaporator 4 is absorbed to vaporize, the temperature of the freezing chamber evaporator 3 or the refrigerating chamber evaporator 4 and the surrounding is reduced, and simultaneously, the refrigerant is changed into low-temperature and low-pressure gas. The refrigerant from the freezing chamber evaporator 3 is returned to the compressor 11 again; or, the refrigerant flowing out of the refrigerating chamber evaporator 4 enters the freezing chamber evaporator 3, returns to the compressor 11 from the freezing chamber evaporator 3 again, repeats the above process, and transfers the heat in the refrigerator into the air outside the refrigerator, thereby achieving the purpose of refrigeration.

In addition, the refrigerator provided by the invention also comprises a refrigerator computer control board 9 which can acquire real-time temperatures detected by the first temperature sensor 5, the second temperature sensor 6, the third temperature sensor 7 and the fourth temperature sensor 8; and controlling the refrigeration system to execute different steps by judging and comparing different real-time temperatures.

Further, the computer control board 9 of the refrigerator is connected with the electromagnetic valve 10, the electromagnetic valve 10 can switch the flow direction of the refrigerant in the refrigeration system, and the refrigerant is controlled to flow into one of the freezing chamber evaporator 3 and the refrigerating chamber evaporator 4, so that one of the freezing chamber evaporator 3 and the refrigerating chamber evaporator 4 is in an open state.

The refrigerator computer control board 9 can also control the on and off of the compressor 11 and adjust its operating frequency.

As shown in fig. 3, the refrigeration control method 100 includes:

and step S4: comparing the difference value between the starting point temperature of the freezing chamber and the real-time temperature of the evaporator of the freezing chamber, and judging whether the difference value is smaller than a first preset interval or not; if the difference is smaller than the first preset interval (corresponding to 'if yes'), executing step S5; if the difference value is greater than the preset interval (corresponding to 'if no'), executing step S6;

the step S5 is to control only the refrigerating chamber evaporator, the refrigerating chamber fan and the freezing chamber fan to be started; the step S6 is to judge whether the difference value is smaller than a second preset interval; if yes, executing step S7; and if not, executing the step S8 in the second preset interval. .

In a preferred embodiment, in step S1, the computer control board 9 of the refrigerator obtains the real-time temperature of the freezing compartment 1 detected by the first temperature sensor 5, and compares the real-time temperature of the freezing compartment 1 with the freezing compartment start point temperature, for example, the freezing compartment start point temperature is-18 ℃. If the real-time temperature in the freezing chamber 1 is less than the starting point temperature of the freezing chamber, executing the step S20; if the real-time temperature in the freezing chamber 1 is higher than the starting point temperature of the freezing chamber, the temperature in the freezing chamber 1 is higher, the freezing chamber 1 needs to be refrigerated, and the step S2 is executed.

In addition, in the step S20, it is first determined whether the real-time temperature in the freezing chamber 1 is lower than the freezing chamber shutdown point temperature, for example, minus 19 ℃, and if it is determined that the real-time temperature in the freezing chamber 1 is lower than the freezing chamber shutdown point temperature, the computer control board 9 controls the compressor 11 to stop; if the real-time temperature in the freezing chamber 1 is judged to be higher than the shutdown point temperature of the freezing chamber, the computer control board 9 controls the compressor 11 to keep running until the real-time temperature in the freezing chamber 1 is lower than the shutdown point temperature of the freezing chamber.

In a preferred embodiment, in step S2, the computer control board 9 of the refrigerator outputs a control signal to turn on the compressor 11, the refrigerant circulates through the refrigeration system, and the cooling capacity generated by the evaporator 3 of the freezing chamber is provided to the freezing chamber 1 by a fan (not shown) of the freezing chamber. At the same time, the refrigerator computer control panel 9 records the opening time of the freezer fan.

In a preferred embodiment, in step S3, the computer control board 9 of the refrigerator obtains the real-time temperature in the refrigerating compartment 2 detected by the second temperature sensor 6, and compares the real-time temperature in the refrigerating compartment 2 with a starting point temperature of the refrigerating compartment, wherein the starting point temperature of the refrigerating compartment is a threshold temperature of the refrigerating compartment 2, and is usually about 0 ℃. If the real-time temperature in the refrigerating chamber 2 is lower than the refrigerating chamber starting point temperature, refrigerating the refrigerating chamber 2 is not needed, meanwhile, whether the real-time temperature of the refrigerating chamber 2 is lower than the refrigerating chamber starting point temperature or not is judged, and if the real-time temperature of the refrigerating chamber 2 is lower than the refrigerating chamber starting point temperature, a refrigerating chamber fan and a refrigerating chamber evaporator in the refrigerating chamber 2 are closed; if the real-time temperature in the cold dining room 2 is higher than the starting point temperature of the refrigerating chamber, the temperature in the refrigerating chamber 2 is higher, and the refrigerating chamber 2 needs to be refrigerated.

In a preferred embodiment, in step S4, the computer control board 9 of the refrigerator obtains the real-time temperature of the evaporator 3 of the freezing chamber detected by the third temperature sensor 6; calculating the difference between the real-time temperature of the freezing chamber evaporator 3 and the starting point of the freezing chamber; judging whether the difference value is smaller than a first preset interval or not; the temperature range of the first preset interval is 0-5 ℃. In a preferred embodiment, said difference is less than or equal to between 0 ℃ and 5 ℃ and in extreme cases cannot exceed 5 ℃.

When the difference value is smaller than the first preset interval (corresponding to 'if' the difference value is equal to the first preset interval), the temperature in the freezing chamber evaporator 3 is lower, and the freezing chamber evaporator 3 can provide cold for the freezing chamber through a freezing chamber fan; meanwhile, the computer control board 9 of the refrigerator controls the electromagnetic valve 10, the electromagnetic valve 10 controls the throttled refrigerant to flow into the refrigerating chamber evaporator 4, so that the cold energy provided by the electromagnetic valve can be conveyed into the refrigerating chamber 2 from the refrigerating chamber fan to be cooled until the real-time temperature in the refrigerating chamber 2 is less than or equal to the starting point temperature of the refrigerating chamber.

When the difference is larger than the first preset interval (corresponding to "if no"), which indicates that the temperature in the freezing chamber evaporator 3 is high, step S6 is performed. Step S6 is to judge whether the difference value is smaller than a second preset interval; if the difference is smaller than the second preset interval (corresponding to "if yes"), step S7 is executed; if the difference is greater than the second preset interval (corresponding to "if no"), step S8 is executed.

And S7, controlling only the refrigerating chamber evaporator 4 and the refrigerating chamber fan to be opened, and controlling the refrigerating chamber fan to be closed.

In a preferred embodiment, when the difference is smaller than or equal to the second predetermined interval, it indicates that the freezer evaporator 3 is in a relatively low temperature state, and at this time, the electromagnetic valve 10 controls the refrigerant to flow to the cold room evaporator 4, and turns on the cold room fan in the cold room 2, so that the cold room fan delivers the cold energy provided by the cold room evaporator 4 to the cold room 2, and the temperature of the cold room 2 is reduced until the real-time temperature is lower than the starting point temperature of the cold room. Further, the freezing chamber evaporator 3 is in a relatively low temperature state, which indicates that the cooling capacity provided by the freezing chamber evaporator 3 is insufficient to cool the freezing chamber 1 at the moment, and the real-time temperature fluctuation in the freezing chamber 1 is not caused, so that the freezing chamber fan is turned off, and the problem that the temperature fluctuation in the freezing chamber 1 is large due to the fact that the temperature of the freezing chamber evaporator 3 rises and the real-time temperature in the freezing chamber 1 is influenced due to the fact that the refrigerant in the refrigerating chamber evaporator 4 flows to the freezing chamber evaporator 3 in the refrigerating process of the refrigerating chamber 2 is avoided.

In addition, when it is determined in step S6 that the difference is greater than the second preset section (corresponding to "if no"), step S8 is performed. Step S8 includes controlling the freezing chamber evaporator 3 and the freezing chamber fan to be turned on.

When the difference between the real-time temperature of freezing chamber evaporator 3 and the freezing chamber starting point is greater than the second preset interval, it indicates that freezing chamber evaporator 3 is in a relatively high temperature state, can not refrigerate refrigerating chamber 2, still need control solenoid valve 10 through refrigerator computer control panel 9 simultaneously for during refrigerant flow direction freezing chamber evaporator 3, freezing chamber evaporator 3 cools down, avoid causing the temperature fluctuation in freezing chamber 1 because of freezing chamber evaporator 3 high temperature.

That is, the present invention ensures the refrigerating effect in the freezing chamber 1 while appropriately sacrificing the refrigerating effect of the refrigerating chamber 2, and overcomes the problem of large temperature fluctuation in the freezing chamber 1.

In this embodiment, the second predetermined interval is greater than the first predetermined interval, for example, the temperature of the first predetermined interval is 2 ℃, the temperature of the second predetermined interval is 2.5 ℃ to 3.0 ℃, and the floating height is 0.5 to 2 ℃.

In a preferred embodiment, in step S3, it is first determined that the real-time temperature in the refrigerating chamber 2 is lower than the temperature at the power-on point of the refrigerating chamber, and then it is determined that the real-time temperature in the refrigerating chamber 2 is lower than the temperature at the power-off point of the refrigerating chamber, if it is determined that refrigeration of the refrigerating chamber 2 is not required, the computer control board 9 of the refrigerator closes the air door of the refrigerating chamber 2, and controls the electromagnetic valve 10 to rotate to the side of the freezing evaporator 3, so that the refrigerant flows into the freezing chamber evaporator 3, and step S110 is executed.

Step S110 is to continuously determine whether refrigeration of the freezing chamber 1 is required (the determination method is similar to step S1); if the real-time temperature in the freezing chamber 1 is higher than the starting point temperature of the freezing chamber, judging that the freezing chamber 1 needs to be refrigerated, and returning to the step S2; or, if the real-time temperature in the freezing chamber 1 is greater than the freezing chamber starting point temperature and the real-time temperature in the freezing chamber 1 is less than the freezing chamber stopping point temperature, and it is determined that refrigeration of the freezing chamber 1 is not required, the step S31 is executed.

Wherein, the step S31 is to continuously determine whether refrigeration of the refrigerating chamber is required (the determination method is the same as S3); comparing the real-time temperature in the refrigerating chamber 2 with the refrigerating chamber starting point temperature, if the real-time temperature in the refrigerating chamber 2 is greater than the refrigerating chamber starting point temperature, judging that the refrigerating chamber 2 needs to be refrigerated, and returning to the step S4; or, if the real-time temperature in the refrigerating chamber 2 is less than the refrigerating chamber starting point temperature and the real-time temperature in the cold dining chamber 2 is less than the refrigerating chamber starting point temperature, and it is determined that refrigeration of the refrigerating chamber 2 is not required, the step S9 is executed.

In a preferred embodiment, the step S9 includes controlling the compressor 11, the freezing chamber fan and the refrigerating chamber fan in the refrigeration system to stop, and recording the stop time of the freezing chamber fan; the off time is stored in the storage unit in the computer control panel 9 of the refrigerator while the operating time between the off time and the on time of the freezing chamber fan (in step S2) during the operation of the compressor 11 is calculated.

In a preferred embodiment, after step S9, step S10 is performed, and it is determined whether the operating time is less than a preset time range, and if the operating time is less than the preset time range (corresponding to "if yes"), step S11 is performed; and if the working time is not less than the preset time range (corresponding to 'if no'), executing the step S12.

Wherein, the step S11 is: decreasing the operating frequency of the compressor in the next refrigeration cycle; step S12 is to determine whether the operating time is greater than the preset time range, if so, step S13 is executed, and step S13 is: the operating frequency of the compressor is increased in the next refrigeration cycle.

In a preferred embodiment, the working time is a minimum value smaller than the preset time range; or the working time is greater than the maximum value of the preset time range. The preset time range is 80min-300min.

The operating frequency of the compressor 11 relates to 30Hz, 36Hz, 42Hz, 50Hz, 56Hz, 60Hz, 66Hz, 72Hz, etc.

In the steps S11 and S13, the operation frequency of the compressor 11 is adjusted to be lower or higher, for example, the operation frequency of the previous period is 36Hz, and when the operation frequency needs to be adjusted to be higher, the operation frequency is adjusted to be 42Hz; when the lower frequency is needed, the frequency is adjusted to 30Hz

In the invention, the operation of the compressor 11 is calculated as an operation period from step S2 to step S9, wherein in step S9, the real-time temperature in the freezing chamber 1 is adapted to the starting point temperature of the freezing chamber, and the problem of overlarge temperature change in the freezing chamber 1 is solved by controlling the refrigerating time of the fan of the freezing chamber.

Simply speaking, too long or too short a cooling time period is not good for stabilizing the real-time temperature in the freezing chamber 1. If the working time of the compressor 11 is too short, for example, less than 80min, which indicates that the operating frequency (or the rotating speed) of the compressor 11 is too high, the temperature in the freezing chamber 1 can be rapidly reduced in a short time by the freezing chamber fan; if the operation time of the compressor 11 is too long, for example, less than 300min, it indicates that the operation frequency (or rotation speed) of the compressor 11 is too low, which results in slow temperature reduction of the freezer evaporator 3, and the freezer fan needs a longer time to slowly reduce the temperature in the freezer 1. That is, the temperature in the freezing chamber 1 falls too fast or too slow, and there is a large range of real-time temperature fluctuation.

Experiments prove that the freezing chamber 1 can obtain the best fresh-keeping effect by small real-time temperature fluctuation of the freezing chamber 1 and long refrigerating time of the freezing chamber 1.

In step S4 of fig. 3, DFS represents the real-time temperature of the cryoevaporator; f-on represents the freezer starting point temperature. DFS-F-on represents the difference between the real-time temperature of the freeze evaporator and the freezer compartment starting point temperature.

The present invention also provides a refrigerator (not shown) for performing refrigeration of a refrigerating chamber and a freezing chamber of the refrigerator, the refrigerating system refrigerating the refrigerating chamber and the freezing chamber according to the refrigeration control method 100 as described above.

In summary, in the refrigeration control method provided by the present invention, before refrigerating the refrigerating chamber, a difference between a real-time temperature of an evaporator in the refrigeration system and a starting point temperature of the freezing chamber is monitored, and when the difference satisfies a preset condition, the refrigerating chamber is refrigerated, that is, the refrigerating priority of the freezing chamber is controlled to be higher than that of the refrigerating chamber, so as to maintain small temperature fluctuation of the freezing chamber, and thus the food material fresh-keeping effect of the freezing chamber is better.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A refrigeration control method of a refrigerator of a double-evaporator system is characterized in that: the refrigeration control method comprises the following steps:

and step S4: comparing the difference between the real-time temperature of the evaporator of the freezing chamber and the starting point temperature of the freezing chamber, and judging whether the difference is smaller than a first preset interval or not; if yes, executing step S5; if not, executing step S6;

the step S5 is to control only the refrigerating chamber evaporator, the refrigerating chamber fan and the freezing chamber fan to be started; the step S6 is to judge whether the difference value is smaller than a second preset interval, and the temperature range of the second preset interval is larger than that of the first preset interval; if yes, executing step S7; if not, executing a step S8, wherein the step S7 is to control only the refrigerating chamber evaporator and the refrigerating chamber fan to be opened and control the freezing chamber fan to be closed, and the step S8 comprises the step of controlling the freezing chamber evaporator and the freezing chamber fan to be opened;

the work flow of the refrigeration system comprises the following steps: under the control of an electromagnetic valve, selecting one of the condensed refrigerants to enter the freezing chamber evaporator and the refrigerating chamber evaporator, and if the condensed refrigerant enters the freezing chamber evaporator, returning the refrigerant coming out of the freezing chamber evaporator to the compressor again; if the condensed refrigerant enters the refrigerating chamber evaporator, the refrigerant flowing out of the refrigerating chamber evaporator enters the freezing chamber evaporator, and returns to the compressor from the freezing chamber evaporator again.

2. The refrigeration control method as recited in claim 1, wherein the temperature of the first preset interval is in a range of 0 ℃ to 5 ℃.

3. The refrigeration control method according to claim 1, wherein in step S3, if it is determined that refrigeration of the refrigerating compartment is not necessary, the step S8 is performed.

4. A refrigeration control method as recited in claim 3, characterized in that step S8 is followed by step S110; the step S110 is to continuously determine whether refrigeration is required for the freezing chamber; if yes, returning to the step S2.

5. The refrigeration control method as set forth in claim 4, wherein said step S110, if no, performs step S31, said step S31 is to continuously judge whether refrigeration of said refrigerating compartment is required; if yes, returning to the step S4.

6. The refrigeration control method according to claim 5, wherein the step S31, if not, performs the step S9, and the step S9 includes controlling the compressor, the freezing chamber fan and the refrigerating chamber fan to be stopped, recording a stop time of the freezing chamber fan, and further calculating an operating time of the freezing chamber fan during the operation of the compressor.

7. The refrigeration control method as set forth in claim 6, further comprising a step S10, wherein said step S10 judges whether said operation time is less than a preset time range, if yes, a step S11 is executed, and said step S11 is: the operating frequency of the compressor is reduced in the next refrigeration cycle.

8. The refrigeration control method according to claim 7, wherein the step S10, if no, executes a step S12, the step S12 is to determine whether the operation time is greater than the preset time range, if yes, executes a step S13, and the step S13 is to: the operating frequency of the compressor is increased in the next refrigeration cycle.

9. The refrigeration control method according to claim 8, wherein in the step S10, the operating time is less than a minimum value of the preset time range; in step S12, the working time is greater than the maximum value of the preset time range.

10. The refrigeration control method as recited in claim 8, wherein the preset time is in a range of 80min to 300min.

11. A refrigerator comprising a refrigeration system for performing refrigeration of a refrigerating chamber and a freezing chamber of the refrigerator, characterized in that:

the refrigerating system refrigerates the refrigerating chamber and the freezing chamber according to the refrigeration control method as set forth in any one of claims 1 to 10.