CN115615127A - Control method of refrigerator - Google Patents

Abstract

The invention provides a refrigerator control method and a refrigerator. Relates to the technical field of refrigeration. The refrigerator emptying method comprises the following steps: and when the refrigerator is started to defrost, judging whether the compressor is stopped. If yes, firstly, one side of the semiconductor refrigeration piece, which corresponds to the first evaporation part, generates heat, and defrosting is carried out on the first evaporation part. And then the other side of the semiconductor refrigerating sheet generates heat to defrost the second evaporation part, and the compressor is started to refrigerate the first evaporation part. If not, the first evaporation part is firstly refrigerated, and one side of the semiconductor refrigeration sheet corresponding to the second evaporation part generates heat, so that the second evaporation part is defrosted. And then the other side of the semiconductor refrigerating sheet generates heat to defrost the first evaporation part and refrigerate the second evaporation part. The evaporator is divided into two evaporation parts, and the characteristics of the semiconductor refrigerating sheet are utilized to heat one side and refrigerate the other side, so that the cold quantity and the heat quantity are offset. The arrangement prevents the temperature of the compartment in the refrigerator from rising too fast, and saves electric energy.

Description

Control method of refrigerator

Technical Field

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

Background

The ordinary refrigerator refrigerates through the evaporimeter, utilizes the fan to make the air circulate between refrigeration compartment and evaporimeter, because the moisture that contains in the air is more, can frost on the evaporimeter surface when the air passes through the evaporimeter, can start automatic defrosting after the refrigerator operation a period. When the refrigerator automatically defrosts, the refrigeration is stopped, and the heating wire is started to heat the evaporator so as to melt the frost of the evaporator. The way of defrosting by heating the evaporator and the air around the evaporator can increase the temperature of the cooling chamber, so that the temperature of the storage chamber can be increased quickly, the storage of food is not facilitated, and the energy consumption is increased when the refrigerator cools again.

Disclosure of Invention

In view of the above problems, the present invention has been made to provide a control method of a refrigerator that overcomes or at least partially solves the above problems, and is capable of solving the problem of rapid temperature rise of a storage compartment when the refrigerator is defrosted and the problem of large power consumption when the refrigeration is restarted.

The refrigerator comprises a refrigeration system, the refrigeration system is provided with a compressor and an evaporator, and the evaporator comprises a semiconductor refrigeration piece and two evaporation parts. The two evaporation parts are respectively thermally connected with two sides of the semiconductor refrigeration piece, so that one side of the semiconductor refrigeration piece, which generates heat, heats the corresponding evaporation part. One of the two evaporation parts is a first evaporation part, and the other evaporation part is a second evaporation part. Wherein the control method comprises the following steps:

and when the refrigerator is started to defrost, judging whether the compressor is stopped.

If yes, entering: the method comprises a first step of enabling one side of the semiconductor refrigeration sheet corresponding to the first evaporation part to generate heat so as to heat the first evaporation part and defrost the first evaporation part. And a second step of heating the second evaporation part by enabling the other side of the semiconductor refrigeration piece to generate heat, defrosting the second evaporation part, and starting the compressor to enable the first evaporation part to refrigerate.

If not, entering: and a third step of refrigerating the first evaporation part and generating heat at one side of the semiconductor refrigerating sheet corresponding to the second evaporation part so as to heat the second evaporation part and defrost the second evaporation part. The fourth step: and enabling the other side of the semiconductor refrigeration piece to generate heat so as to heat the first evaporation part, defrost the first evaporation part and enable the second evaporation part to refrigerate.

Optionally, in the method for controlling a refrigerator, between the first step and the second step, it is further determined whether defrosting of the first evaporation portion is completed, and after defrosting of the first evaporation portion is completed, the second step is performed. The second step is followed by judging whether the second evaporation part finishes defrosting. And judging whether the second evaporation part finishes defrosting or not between the third step and the fourth step, and entering the fourth step after the second evaporation part finishes defrosting. The fourth step is followed by judging whether the first evaporation part completes defrosting.

Judging whether the evaporation part finishes defrosting comprises the following steps: and detecting the temperature of the evaporation part, and judging whether the temperature of the evaporation part is greater than or equal to a first preset temperature value or not. And if so, determining that the evaporation part finishes defrosting. If not, judging whether the defrosting time for defrosting the evaporation part is greater than or equal to a first preset time value or not. If not, the evaporation part is continuously heated. The evaporation part is the first evaporation part or the second evaporation part.

Alternatively, in the control method of the refrigerator, the temperature of the corresponding evaporation portion is detected using a defrosting temperature sensor. And an auxiliary temperature sensor is arranged on the evaporation pipeline of each evaporation part. Judging whether the evaporation part finishes defrosting further comprises the following steps: and when the defrosting time for defrosting the evaporation part is greater than or equal to a first preset time value, judging whether the temperature detection value of the auxiliary temperature sensor is less than or equal to a second preset temperature value. And if so, judging that the evaporation part is defrosted to generate a fault, and determining that the evaporation part is defrosted completely. If not, continuing to heat the evaporation part until the defrosting time for defrosting the evaporation part reaches a second preset time value, and determining that the evaporation part finishes defrosting.

Optionally, in the control method of the refrigerator, after the second step, the method further includes determining whether defrosting of the second evaporation portion is completed, and after defrosting of the second evaporation portion is completed, the method proceeds to a fifth step. And judging whether the first evaporation part finishes defrosting or not after the fourth step, and entering a fifth step after the first evaporation part finishes defrosting. The fifth step includes: and judging whether a fault is generated, if so, entering a defrosting fault control program. If not, the defrosting is quitted.

Optionally, in the control method of the refrigerator, the refrigerator further includes a cooling chamber, a first storage compartment and a second storage compartment. The first evaporation part and the second evaporation part are both arranged in the cooling chamber. The cooling chamber is in circulating communication with the first storage chamber, and the cooling chamber is in circulating communication with the second storage chamber. The preset storage temperature of the first storage chamber is lower than that of the second storage chamber. The control method further comprises the following steps: when only the first storage compartment needs to be cooled, only the first evaporation part is cooled. When the first storage chamber and the second storage chamber both need to be refrigerated, the first evaporation part and the second evaporation part are refrigerated at the same time. When only the second storage compartment needs to be refrigerated, only the second evaporation part is refrigerated.

Optionally, in the control method of the refrigerator, when only the first storage compartment needs to be cooled, the compressor is operated according to a first preset frequency, and the refrigerant entering the first evaporation portion is throttled by using a first throttling device. When only the second storage compartment needs to refrigerate, the compressor is enabled to operate according to a second preset frequency, and a second throttling device is used for throttling the refrigerant entering the second evaporation part.

When the first storage chamber and the second storage chamber need to refrigerate, the difference between the temperature of the first storage chamber and the starting point temperature of the first storage chamber is larger than or equal to a first preset difference, and the difference between the temperature of the second storage chamber and the starting point temperature of the second storage chamber is larger than or equal to a second preset difference, the compressor is enabled to operate according to a third preset frequency, a first throttling device is used for throttling the refrigerant, and the refrigerant flows into the first evaporation part and the second evaporation part in a shunting manner.

When the first storage chamber and the second storage chamber need to be refrigerated, and the difference between the temperature of the first storage chamber and the starting point temperature of the first storage chamber is smaller than a first preset difference, or the difference between the temperature of the second storage chamber and the starting point temperature of the second storage chamber is smaller than a second preset difference, the compressor is enabled to operate according to a fourth preset frequency, a second throttling device is used for throttling the refrigerant, and the refrigerant is shunted to enter the first evaporation part and the second evaporation part.

The third preset frequency is greater than the fourth preset frequency, the fourth preset frequency is greater than the first preset frequency, and the first preset frequency is greater than the second preset frequency. The first throttling device and the second throttling device are both capillary tubes, and the flow rate of the first throttling device is larger than that of the second throttling device.

Optionally, in the control method of the refrigerator, the refrigerator further includes a water pan provided at a lower side of the two evaporation portions. The control method further comprises the following steps: and when the refrigerator is started to defrost, heating the water pan.

Optionally, in a control method of a refrigerator, heating the water pan when the refrigerator starts defrosting includes: and controlling the power of a heating device for heating the water receiving tray according to the time of the water receiving tray and the pressure born by the water receiving tray.

Optionally, controlling the power of a heating device for heating the water-receiving tray according to the time of the water-receiving tray and the pressure applied to the water-receiving tray, including: and acquiring the power of the heating device by using a time interval, a pressure interval and a power relation table according to the time of the water receiving tray and the pressure born by the water receiving tray. And controlling the heating device to work according to the acquired power. In two adjacent pressure intervals, the power corresponding to the pressure interval with the larger pressure value is greater than or equal to the power corresponding to the pressure interval with the smaller pressure value. The time interval comprises a first interval, a second interval and a third interval, wherein the first interval is from when the refrigerator is started to defrost to when the first evaporation part and the second evaporation part finish defrosting. The second interval is within a first preset time after the first interval. The third interval is within a second preset time after the second interval. And the pressure section corresponding to the third section comprises a heating stopping section, and the heating device is closed in the third section when the pressure is in the heating stopping section. If the heating device is not closed in the third interval, closing the heating device when the third interval is finished.

Optionally, in the control method of the refrigerator, the refrigerator further includes a blower configured to cause airflow to flow from the air inlet side of the first evaporation portion and the second evaporation portion to the air outlet side of the first evaporation portion and the second evaporation portion. In the second step: and when the other side of the semiconductor refrigerating sheet generates heat, the compressor is started for a third preset time in a delayed manner. And after the compressor is started and the temperature of the first evaporation part is reduced to be lower than a third preset temperature value, starting the fan. In the third step: the fan is also caused to continue to operate. In the fourth step: and the first evaporation part is also refrigerated, and the fan is turned off.

In the control method of the refrigerator, the evaporator is divided into two evaporation parts, and the characteristic of the semiconductor refrigeration piece is utilized, so that the heating surface of the evaporator heats one of the evaporation parts, and the refrigerating surface of the evaporator compensates cold for the other evaporation part or refrigerates the other evaporation part, so that the evaporator generates cold and offsets heat generated by the semiconductor refrigeration piece during partial defrosting. The arrangement slows down the rising speed of the room temperature of the storage chamber when the refrigerator defrosts, and saves the consumed electric energy when the refrigerator restarts to refrigerate.

Furthermore, in the refrigerator, the water receiving tray and the heating device are arranged below the evaporator and are used for receiving water falling from the evaporator or frost which is not completely melted and heating the water or the frost, so that the frost is converted into liquid water again and is discharged out of the refrigerator. The arrangement improves the defrosting efficiency and shortens the time required by defrosting of the evaporator.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:

fig. 1 is a schematic configuration view of a refrigerating system of a refrigerator according to one embodiment of the present invention;

fig. 2 is a schematic structural view of an evaporator of a refrigerator according to one embodiment of the present invention;

FIG. 3 is a flow chart of a control method according to one embodiment of the invention;

FIG. 4 is another flow chart of a control method according to one embodiment of the present invention;

fig. 5 is a flowchart of determining whether or not defrosting of an evaporation portion is completed in the control method according to one embodiment of the invention;

fig. 6 is a flow chart of a fifth step in the control method according to one embodiment of the invention.

Detailed Description

A control method of a refrigerator and a refrigerator according to an embodiment of the present invention will be described with reference to fig. 1 to 6. In the description of the present embodiments, it is to be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature, i.e., one or more such features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise. When a feature "comprises or comprises" a or some of its intended features, this indicates that other features are not excluded and that other features may be further included, unless expressly stated otherwise.

Unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," "coupled," and the like are to be construed broadly and encompass, for example, both fixed and removable connection or integration; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. Those of ordinary skill in the art should understand the specific meaning of the above terms in the present invention according to specific situations.

Further, in the description of the present embodiment, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature therebetween. That is, in the description of the present embodiment, the first feature being "on", "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is higher in level than the second feature. A first feature "under," "beneath," or "beneath" a second feature may be directly under or obliquely under the second feature or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiments, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Fig. 1 is a schematic configuration diagram of a refrigeration system of a refrigerator according to an embodiment of the present invention, and as shown in fig. 1, and referring to fig. 2 and 3, the embodiment of the present invention provides a control method of a refrigerator including a refrigeration system 1, the refrigeration system 1 having a compressor 10 and an evaporator 20, the evaporator 20 including a semiconductor cooling sheet 23 and two evaporation portions. The two evaporation portions are respectively thermally connected to both sides of the semiconductor chilling plate 23, so that the side of the semiconductor chilling plate 23 generating heat heats the corresponding evaporation portion. One of the two evaporation portions is a first evaporation portion 21, and the other is a second evaporation portion 22. The control method comprises the following steps:

s101: and starting the refrigerator to defrost.

S102: when the refrigerator is started to defrost, it is determined whether the compressor 10 is stopped.

S103: if yes, entering: in the first step S1031, the semiconductor cooling fins 23 generate heat at the side corresponding to the first evaporation unit 21 to heat the first evaporation unit 21, thereby defrosting the first evaporation unit 21. The second step S1032 is to generate heat from the other side of the semiconductor cooling sheet 23 to heat the second evaporation portion 22, defrost the second evaporation portion 22, and turn on the compressor 10 to cool the first evaporation portion 21.

S104: if not, entering: the third step S1041 is to cool the first evaporation portion 21 and generate heat at a side of the semiconductor cooling sheet 23 corresponding to the second evaporation portion 22 to heat the second evaporation portion 22, thereby defrosting the second evaporation portion 22. Fourth step S1042: the other side of the semiconductor cooling sheet 23 is heated to heat the first evaporation portion 21, defrost the first evaporation portion 21, and cool the second evaporation portion 22.

The cold end of the semiconductor refrigerating sheet 23 is fully utilized, so that the cold quantity of one evaporating part is compensated for the other evaporating part when the other evaporating part is heated, and the rise of the room temperature in the compartment of the refrigerator is slowed down.

As shown in fig. 4, in some embodiments of the present invention, between the first step S1031 and the second step S1032, determining whether the first evaporation portion 21 completes defrosting is further included, and after the first evaporation portion 21 completes defrosting, the process proceeds to the second step S1032. The second step S1032 is followed by determining whether or not the second evaporation portion 22 has finished defrosting. Between the third step S1041 and the fourth step S1042, it is further determined whether the second evaporation portion 22 completes defrosting, and the process proceeds to the fourth step S1042 after the second evaporation portion 22 completes defrosting. The fourth step S1042 is followed by determining whether or not the first evaporation portion 21 has finished defrosting.

Specifically, the determination of whether defrosting of the first evaporation part and the second evaporation part is completed may be the same, and the first evaporation part and the second evaporation part are both one evaporation part, that is, the first evaporation part and the second evaporation part may be referred to as evaporation parts, and determining whether defrosting of the evaporation parts is completed is to determine whether defrosting of the first evaporation part is completed S105, or to determine whether defrosting of the second evaporation part is completed S105. And judging whether the evaporation part finishes defrosting.

As shown in fig. 5, the determining whether the evaporation portion completes defrosting includes: s1051: the temperature of the evaporation portion is detected. S1052: and judging whether the temperature of the evaporation part is greater than or equal to a first preset temperature value or not. And if so, determining that the evaporation part finishes defrosting. S1053: if not, judging whether the defrosting time for defrosting the evaporation part is more than or equal to a first preset time value. S1054: if not, the evaporation part is continuously heated. The evaporation unit is the first evaporation unit 21 or the second evaporation unit 22. In particular, the first preset temperature value is comprised between 2 ℃ and 4 ℃, preferably 3 ℃, and the first preset time value is comprised between 18 minutes and 22 minutes, preferably 20 minutes. The arrangement can avoid incomplete defrosting of the first evaporation part 21 and the second evaporation part 22 and influence on the refrigeration effect.

In some embodiments of the present invention, the temperature of the corresponding evaporation portion is detected using a defrosting temperature sensor. An auxiliary temperature sensor 24 is provided on the evaporation pipe of each evaporation portion.

Judging whether the evaporation part finishes defrosting further comprises the following steps:

s1055: when the defrosting time period for defrosting the evaporation portion is greater than or equal to a first preset time value, it is determined whether the temperature detection value of the auxiliary temperature sensor 24 is less than or equal to a second preset temperature value.

S1056: if yes, the fault of defrosting of the evaporation part is judged, and the evaporation part is determined to finish defrosting.

S1057: if not, continuing to heat the evaporation part until the defrosting time for defrosting the evaporation part reaches a second preset time value, and determining that the evaporation part finishes defrosting.

In particular, the second preset temperature value is comprised between-3 ℃ and-6 ℃, preferably-5 ℃, and the second preset time value is comprised between 7 minutes and 13 minutes, preferably 10 minutes. Set up like this through carrying out failure to the evaporation department and judge and the compensation heating, can avoid the evaporation department to defrost incompletely and prevent that semiconductor refrigeration piece 23 from heating the evaporation department all the time because of defrosting the trouble, improved the efficiency of defrosting, avoid thermal waste.

In some embodiments of the present invention, after the second step S1032, the method further includes determining whether the second evaporation portion 22 completes defrosting, and after the second evaporation portion 22 completes defrosting, the method proceeds to a fifth step S106. After the fourth step S1042, it is determined whether the first evaporation portion 21 has finished defrosting, and the process proceeds to a fifth step S106 after the first evaporation portion 21 has finished defrosting.

As shown in fig. 6, the fifth step S106 includes: s1061: it is determined whether a fault is generated. S1062: if yes, the defrosting is exited and the defrosting fault control program is entered. S1063: if not, the defrosting is quitted, and normal control is carried out. This arrangement adds to the defrost fault control procedure. The arrangement prevents the refrigerator from frosting too much due to the defrosting function fault, and avoids the refrigeration function of the refrigerator from being influenced.

In some embodiments of the present invention, the refrigerator further comprises a cooling chamber, a first storage compartment and a second storage compartment. The first evaporation portion 21 and the second evaporation portion 22 are both provided in the cooling chamber. The cooling chamber is in circulating communication with the first storage chamber, and the cooling chamber is in circulating communication with the second storage chamber. The preset storage temperature of the first storage chamber is lower than that of the second storage chamber. Specifically, air doors are arranged between the cooling chamber and the first storage chamber and between the cooling chamber and the second storage chamber, so that air circulation between the cooling chamber and the first storage chamber and between the cooling chamber and the second storage chamber is controlled. In other embodiments, a damper is disposed between only the cooling compartment and the second storage compartment to control the flow of air between the cooling compartment and the second storage compartment. Further, the first storage compartment may be a freezing compartment, and the second storage compartment may be a refrigerating compartment.

In some embodiments of the present invention, the control method of the refrigerator further includes: when only the first storage compartment needs to be cooled, only the first evaporation portion 21 is cooled. When only the second storage compartment needs to be cooled, only the second evaporation portion 22 is cooled. When both the first and second storage compartments need to be cooled, the first and second evaporation portions 21 and 22 are cooled at the same time.

Specifically, when only the first storage compartment needs to be cooled, the compressor 10 is operated at the first preset frequency, and the refrigerant entering the first evaporation portion 21 is throttled by the first throttling device 41. And judging whether the temperature of the first storage chamber is greater than or equal to the temperature of the starting point and whether the temperature of the second storage chamber is less than or equal to the temperature of the stopping point, and if so, determining that only the first storage chamber needs to be refrigerated.

When only the second storage compartment needs to be cooled, the compressor 10 is operated at the second preset frequency, and the refrigerant entering the second evaporation part 22 is throttled by the second throttling device 42. And judging whether the temperature of the first storage chamber is less than or equal to the temperature of a shutdown point and whether the temperature of the second storage chamber is greater than or equal to the temperature of a startup point, and if so, determining that only the second storage chamber needs to be refrigerated.

And judging whether the temperature of the first storage chamber is greater than or equal to the starting point temperature or not and whether the temperature of the second storage chamber is greater than or equal to the starting point temperature or not, and if so, determining that the first storage chamber and the second storage chamber both need to be refrigerated. When the first storage chamber and the second storage chamber are both required to be refrigerated, whether the difference between the temperature of the first storage chamber and the temperature of the starting point of the first storage chamber is larger than or equal to a first preset difference or not is judged, and whether the difference between the temperature of the second storage chamber and the temperature of the starting point of the second storage chamber is larger than or equal to a second preset difference or not is judged. If so, the compressor 10 is operated according to the third preset frequency, and the refrigerant is throttled by the first throttling device 41 and then is divided into the first evaporation part 21 and the second evaporation part 22. In particular, the first preset difference may be 3 ℃ to 7 ℃, preferably 5 ℃. The second predetermined difference may be 3 ℃ to 7 ℃, preferably 5 ℃.

When the first storage chamber and the second storage chamber need to be refrigerated, whether the difference value between the temperature of the first storage chamber and the starting point temperature of the first storage chamber is smaller than a first preset difference value or not is judged, or whether the difference value between the temperature of the second storage chamber and the starting point temperature of the second storage chamber is smaller than a second preset difference value or not is judged. If so, the compressor 10 is operated according to the fourth preset frequency, and the refrigerant is throttled by the second throttling device 42 and then is divided into the first evaporation part 21 and the second evaporation part 22.

The third preset frequency is greater than the fourth preset frequency, the fourth preset frequency is greater than the first preset frequency, and the first preset frequency is greater than the second preset frequency. Specifically, the third preset frequency is a rated frequency of the compressor 10, the fourth preset frequency is ninety percent of the rated frequency, the first preset frequency is eighty percent of the rated frequency of the compressor 10, and the second preset frequency is seventy percent of the rated frequency of the compressor 10.

The first throttling device 41 and the second throttling device 42 are both capillary tubes, and the flow rate of the first throttling device 41 is greater than that of the second throttling device 42. Specifically, the first throttling device 41 is a first capillary tube, and the second throttling device 42 is a second capillary tube. The two capillaries have different tube diameters to achieve different throttling capabilities. The flow rate of the first capillary 24 is 7L/min to 10L/min, preferably 7L/min. The flow rate of the second capillary 25 is 4L/min to 6L/min, preferably 5L/min. The arrangement can realize the cold quantity distribution of the refrigerator according to the requirement and improve the refrigeration efficiency.

In some embodiments of the present invention, the refrigeration system 1 further comprises a condenser and a dry filter, and the compressor 10, the condenser and the dry filter are connected in series.

In some embodiments of the invention, the refrigeration system 1 further comprises a first valve 31, a bypass line and a second valve 32. The first valve 31 has two outlets, and the two outlets of the first valve 31 communicate with the inlets of the two evaporation portions, respectively. The bypass line is arranged between the outlets of the two throttling devices, and the second valve 32 is arranged on the bypass line. The first valve 31 and the second valve 32 cooperate with each other to operate both evaporation sections simultaneously, simultaneously stop or alternatively.

When only the first storage compartment requires cooling, the first valve 31 allows only the refrigerant to flow through the first throttle device 41, and the second valve 32 is closed to operate only the first evaporation portion 21.

When only the second storage compartment requires cooling, the first valve 31 allows only the refrigerant to flow through the second throttling device 42, and the second valve 32 is closed, so that only the second evaporation portion 22 operates. When both the first and second storage compartments require cooling, the first valve 31 is configured such that the refrigerant flows only through the first throttling device 41 or the second throttling device 42, and the second valve 32 is opened such that the first evaporation part 21 and the second evaporation part 22 operate simultaneously.

In some embodiments of the present invention, the control method of the refrigerator further includes: after only the first storage chamber starts to refrigerate, whether the temperature of the first storage chamber is smaller than or equal to the temperature of a shutdown point or whether the temperature of the second storage chamber is larger than or equal to the temperature of a startup point is judged. If the temperature of the first storage chamber is less than or equal to the temperature of the shutdown point and the temperature of the second storage chamber is less than the temperature of the startup point, the first storage chamber stops refrigerating. If the temperature of the first storage chamber is less than or equal to the temperature of a shutdown point and the temperature of the second storage chamber is greater than or equal to the temperature of a startup point, the first storage chamber stops refrigerating, the second storage chamber starts refrigerating, and the situation that only the second storage chamber is refrigerated is achieved. In other cases, the first storage chamber and the second storage chamber are both required to be refrigerated. Similarly, in other cases, whether the current control is finished and the corresponding other control is entered is determined according to the cold demand condition of the first storage chamber and the second storage chamber.

Further, when both the temperature of the first storage compartment and the temperature of the second storage compartment are less than or equal to the shutdown point temperature, the compressor 10 stops working. The refrigerator can timely quit refrigeration according to the temperature of the storage chamber, and energy consumption of the refrigerator is saved.

In some embodiments of the invention, the refrigerator further comprises a drip tray 25 disposed at the lower side of the two evaporation parts. The control method further comprises the following steps: when the refrigerator is started to defrost, the water pan 25 is heated. When the refrigerator starts defrosting, the frost firstly slides from the evaporator 20 to the lower water receiving tray 25, and then the water receiving tray 25 is heated to melt the frost. The arrangement can avoid incomplete defrosting and realize more efficient defrosting.

In some embodiments of the invention, the step of heating the drip tray 25 when the refrigerator is started to defrost comprises: and controlling the power of a heating device for heating the water receiving tray 25 according to the time of the water receiving tray 25 and the pressure born by the water receiving tray 25. Specifically, the pressure borne by the water pan 25 is obtained by a pressure sensor arranged on the water pan 25, and the heating device is a low-power heating wire. The arrangement can realize slow melting of ice blocks.

In some embodiments of the invention, controlling the power of the heating device that heats the drip tray 25 according to the time the drip tray 25 is located and the pressure to which the drip tray 25 is subjected comprises:

and acquiring the power of the heating device by using the time interval, the pressure interval and the power relation table according to the time of the water receiving tray 25 and the pressure born by the water receiving tray 25. And in two adjacent pressure intervals, the power corresponding to the pressure interval with the larger pressure value is larger.

And controlling the heating device to work according to the acquired power.

For example, there are four pressure zones, the pressure value range of the first pressure zone is 0-pa1, the pressure value range of the second pressure zone is pa1-pa2, the pressure value range of the third pressure zone is pa2-pa3, and the pressure value range of the fourth pressure zone is pa3-pa4. And, the pressure values pa4, pa3, pa2, and pa1 decrease in order.

The time interval includes a first interval, a second interval and a third interval, and the first interval is from when the refrigerator starts defrosting to when the first evaporation part 21 and the second evaporation part 22 finish defrosting. The second interval is within a first preset time after the first interval. The third interval is within a second preset time after the second interval. Specifically, the first preset time period is 30 minutes, and the second preset time period is 30 minutes. The pressure section corresponding to the third section comprises a heating stopping section, and the heating device is closed in the third section when the pressure is in the heating stopping section. If the heating device is not closed in the third interval, the heating device is closed when the third interval is finished. Specifically, the other time after the end of the third interval is the other interval.

The power of the heating device can be adjusted according to the frosting amount, so that heat waste is avoided, redundant heat cannot be generated to influence the temperature of the compartment, and the temperature rise of the compartment is slowed down to the maximum extent.

In some embodiments of the present invention, the refrigerator further includes a blower fan 50 configured to induce airflow from the air inlet side of the first evaporation part 21 and the second evaporation part 22 to the air outlet side of the first evaporation part 21 and the second evaporation part 22. That is, the fan 50 causes the air flow to circulate between the cooling compartment and the first storage compartment, and causes the air flow to circulate between the cooling compartment and the second storage compartment.

In a second step: when the other side of the semiconductor refrigerating sheet 23 generates heat, the compressor 10 is started with a delay of a third preset time. Specifically, when the semiconductor cooling fins 23 are energized, one side of the semiconductor cools and the other side of the semiconductor heats. After the compressor 10 is started, the auxiliary temperature sensor is used to obtain the temperature of the first evaporation portion 21, and when the temperature of the first evaporation portion 21 is reduced to be lower than a third preset temperature value, the fan 50 is started. Specifically, the semiconductor cooling side compensates for the cooling capacity of the first evaporation portion 21. Further, the blower 50 may be turned off in the fifth step, and the blower 50 may not be turned off if the first and second storage compartments are requiring cooling at this time. Specifically, the third preset time period is 2 minutes, and the third preset temperature value is-14 ℃.

In a third step: the fan 50 is also caused to continue to operate. In the fourth step: the second evaporation portion 22 is also cooled, and the fan 50 is turned off. Further, the compressor 10 may be turned on in the fifth step, and if the first storage compartment and the second storage compartment need to be cooled at this time, the compressor 10 may not be turned off, and the fan 50 may be turned on as required, that is, normally controlled or controlled according to the defrosting fault control program. The arrangement can avoid frequent starting of the compressor 10, and simultaneously, the semiconductor refrigerating sheet 23 is utilized to meet the requirement of refrigeration of the refrigerator, so that the compressor 10 is prevented from being damaged, and the energy consumption of the refrigerator is saved.

In some embodiments of the present invention, evaporator 20 further comprises a heat shield and two heat exchange plates. The heat insulation plate is a thin-wall sealed shell and is internally vacuumized. The heat insulating plate is disposed between the two evaporation parts, that is, between the first evaporation part 21 and the second evaporation part 22. Further, the heat insulation plate is provided with a mounting through hole. The semiconductor refrigeration piece is arranged in the mounting through hole. Two heat exchange plates are respectively arranged on two sides of the heat insulation plate. The semiconductor refrigerating sheet is arranged between the heat exchange plate and the heat insulation plate. The first evaporation part 21 and the second evaporation part 22 are disposed at both sides of the two heat exchange plates. Each evaporation part also comprises a refrigerant pipeline and a radiating fin arranged on the refrigerant pipeline. At least one heat radiating fin of each evaporation part is in contact with one of the heat exchange plates.

Thus, it should be appreciated by those skilled in the art that while various exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications which are consistent with the principles of this invention may be determined or derived directly from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A control method of a refrigerator comprises a refrigeration system, wherein the refrigeration system is provided with a compressor and an evaporator, and the evaporator comprises a semiconductor refrigeration piece and two evaporation parts; the two evaporation parts are respectively thermally connected with two sides of the semiconductor refrigeration piece, so that one side of the semiconductor refrigeration piece, which generates heat, heats the corresponding evaporation part; one of the two evaporation parts is a first evaporation part, and the other evaporation part is a second evaporation part; wherein, the control method comprises the following steps:

when the refrigerator is started to defrost, judging whether the compressor is stopped;

if yes, entering: a first step of heating the first evaporation part by generating heat at one side of the semiconductor refrigeration sheet corresponding to the first evaporation part to defrost the first evaporation part; a second step of heating the second evaporation part by generating heat at the other side of the semiconductor refrigeration piece, defrosting the second evaporation part, and starting the compressor to refrigerate the first evaporation part;

if not, entering: a third step of refrigerating the first evaporation part and generating heat at one side of the semiconductor refrigerating sheet corresponding to the second evaporation part to heat the second evaporation part and defrost the second evaporation part; the fourth step: and enabling the other side of the semiconductor refrigeration piece to generate heat so as to heat the first evaporation part, defrost the first evaporation part and enable the second evaporation part to refrigerate.

2. The control method according to claim 1, wherein

Judging whether the first evaporation part finishes defrosting or not between the first step and the second step, and entering the second step after the first evaporation part finishes defrosting; after the second step, judging whether the second evaporation part finishes defrosting;

judging whether the second evaporation part finishes defrosting or not between the third step and the fourth step, and entering the fourth step after the second evaporation part finishes defrosting; after the fourth step, judging whether the first evaporation part finishes defrosting;

judging whether the evaporation part finishes defrosting comprises the following steps:

detecting the temperature of the evaporation part, and judging whether the temperature of the evaporation part is greater than or equal to a first preset temperature value or not; if yes, determining that the evaporation part finishes defrosting;

if not, judging whether the defrosting time for defrosting the evaporation part is greater than or equal to a first preset time value or not; if not, continuing to heat the evaporation part; the evaporation part is the first evaporation part or the second evaporation part.

3. The control method according to claim 2, wherein

Detecting the temperature of the corresponding evaporation part by using a defrosting temperature sensor; an auxiliary temperature sensor is arranged on an evaporation pipeline of each evaporation part;

judging whether the evaporation part finishes defrosting further comprises the following steps:

when the defrosting time for defrosting the evaporation part is greater than or equal to a first preset time value, judging whether the temperature detection value of the auxiliary temperature sensor is less than or equal to a second preset temperature value;

if yes, judging that the evaporation part is defrosted to generate a fault, and determining that the evaporation part is defrosted completely;

if not, continuing to heat the evaporation part until the defrosting time for defrosting the evaporation part reaches a second preset time value, and determining that the evaporation part finishes defrosting.

4. The control method according to claim 3, wherein

Judging whether the second evaporation part finishes defrosting after the second step, and entering a fifth step after the second evaporation part finishes defrosting;

judging whether the first evaporation part finishes defrosting or not after the fourth step, and entering a fifth step after the first evaporation part finishes defrosting;

the fifth step includes:

judging whether a fault is generated, if so, exiting defrosting and entering a defrosting fault control program; if not, the defrosting is quitted.

5. The control method according to claim 1, wherein

The refrigerator also comprises a cooling chamber, a first storage chamber and a second storage chamber; the first evaporation part and the second evaporation part are arranged in the cooling chamber;

the cooling chamber is in circulating communication with the first storage chamber, and the cooling chamber is in circulating communication with the second storage chamber; the preset storage temperature of the first storage chamber is lower than that of the second storage chamber;

the control method further comprises the following steps:

when only the first storage compartment needs to be refrigerated, only the first evaporation part is refrigerated;

when the first storage chamber and the second storage chamber both need to be refrigerated, the first evaporation part and the second evaporation part are refrigerated at the same time;

when only the second storage compartment needs to be cooled, only the second evaporation part is cooled.

6. The control method according to claim 5, wherein

When only the first storage compartment needs to be refrigerated, the compressor is enabled to operate according to a first preset frequency, and a first throttling device is utilized to throttle the refrigerant entering the first evaporation part;

when only the second storage compartment needs to be refrigerated, the compressor is enabled to operate according to a second preset frequency, and a second throttling device is used for throttling the refrigerant entering the second evaporation part;

when the first storage chamber and the second storage chamber need to be refrigerated, and the difference between the temperature of the first storage chamber and the starting point temperature of the first storage chamber is greater than or equal to a first preset difference, and the difference between the temperature of the second storage chamber and the starting point temperature of the second storage chamber is greater than or equal to a second preset difference, the compressor is enabled to operate according to a third preset frequency, a first throttling device is used for throttling the refrigerant, and the refrigerant flows into the first evaporation part and the second evaporation part in a shunting manner;

when the first storage chamber and the second storage chamber need to be refrigerated, and the difference between the temperature of the first storage chamber and the starting point temperature of the first storage chamber is smaller than a first preset difference, or the difference between the temperature of the second storage chamber and the starting point temperature of the second storage chamber is smaller than a second preset difference, the compressor is enabled to operate according to a fourth preset frequency, a second throttling device is used for throttling the refrigerant, and the refrigerant is shunted to enter the first evaporation part and the second evaporation part.

7. The control method according to claim 1, wherein the refrigerator further includes a water pan provided at a lower side of the two evaporation portions; the control method further comprises the following steps: and when the refrigerator is started to defrost, heating the water pan.

8. The control method of claim 7, wherein heating the drip tray when the refrigerator is activated for defrosting comprises:

and controlling the power of a heating device for heating the water receiving tray according to the time of the water receiving tray and the pressure born by the water receiving tray.

9. The method of claim 8, wherein controlling the power of a heating device for heating the water-receiving tray according to the time the water-receiving tray is located and the pressure applied to the water-receiving tray comprises:

acquiring the power of the heating device by using a time interval, a pressure interval and a power relation table according to the time of the water receiving tray and the pressure born by the water receiving tray; controlling the heating device to work according to the obtained power; in two adjacent pressure intervals, the power corresponding to the pressure interval with the larger pressure value is greater than or equal to the power corresponding to the pressure interval with the smaller pressure value;

the time intervals include a first interval, a second interval and a third interval,

the first interval is from when the refrigerator is started to defrost to when the first evaporation part and the second evaporation part finish defrosting; the second interval is within a first preset time length after the first interval; the third interval is within a second preset time length after the second interval;

the pressure interval corresponding to the third interval comprises a heating stopping interval, and the heating device is closed in the third interval when the pressure is in the heating stopping interval; if the heating device is not closed in the third interval, closing the heating device when the third interval is finished.

10. The control method according to claim 5, wherein the refrigerator further comprises a blower configured to cause airflow to flow from the air inlet side of the first and second evaporation parts to the air outlet side of the first and second evaporation parts;

in the second step: when the other side of the semiconductor refrigerating sheet generates heat, the compressor is started for a third preset time in a delayed mode; after the compressor is started and the temperature of the first evaporation part is reduced to be lower than a third preset temperature value, starting the fan;

in the third step: the fan is also enabled to continue to operate; in the fourth step: and the first evaporation part is also refrigerated, and the fan is turned off.

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