CN113669997B

CN113669997B - Refrigerator defrosting control method and device and refrigerator

Info

Publication number: CN113669997B
Application number: CN202110926612.3A
Authority: CN
Inventors: 黎建柳; 李琦; 辛海亚; 王飞
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2022-07-08
Anticipated expiration: 2041-08-12
Also published as: CN113669997A

Abstract

The invention discloses a refrigerator defrosting control method and device and a refrigerator. Wherein, the method comprises the following steps: correcting the accumulated working time of the compressor according to information influencing the frosting of the evaporator to obtain the corrected working time of the compressor; and determining whether defrosting is carried out or not according to the corrected working time of the compressor, the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return inlet of the evaporator. The invention can more reasonably and accurately switch in defrosting, realize more accurate defrosting control, avoid defrosting under the condition of very thick frost layer or very thin frost layer, reduce the temperature rise of the chamber during defrosting and reduce the energy consumption during defrosting.

Description

Refrigerator defrosting control method and device and refrigerator

Technical Field

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

Background

In the process of refrigeration operation of the air-cooled refrigerator, under the drive of a fan, air in storage chambers (also called compartments) is forced to generate heat convection with an evaporator, and airflow in the refrigerator is continuously circulated through an air supply channel and an air return channel, so that the temperature of each storage chamber is maintained to be stable in a set range.

During the circulation of the air flow in the box, when the surface temperature of the evaporator is lower than 0 ℃ and lower than the dew point temperature of the air, the water vapor in the circulating air flow can be separated out on the coil and the fins of the evaporator and condensed and frosted. And because the coil and the fin at the bottom of the evaporator are close to the air return opening and are firstly contacted with airflow with higher temperature and humidity, the frosting of the coil and the fin at the part is also the most serious. The frost layer on the entire evaporator exhibits a frosting characteristic of being dense at the bottom and sparse at the top.

Along with the continuous operation of the refrigerator, the frost layer is continuously thickened, the heat exchange thermal resistance of the evaporator and the circulation resistance of the circulating air are increased, and the reduction of the circulating air flow, the reduction of the heat exchange coefficient, the reduction of the refrigerating performance of the refrigerator and the increase of the energy consumption are caused. Therefore, when the frost layer on the surface of the evaporator reaches a certain thickness, the operation efficiency of the refrigerator is greatly reduced, and the refrigerator needs to be defrosted.

The core technology of defrosting control is a method for identifying a defrosting entry point, and most of the existing refrigerators adopt a timing defrosting method. The timed defrosting method is to execute defrosting operation when the accumulated refrigerator power-on time or the accumulated compressor running time reaches a set value.

The timing defrosting method has certain disadvantages that when the refrigerator is in different working conditions, the frosting rates are different. For example, under a high-temperature and high-humidity working condition, when a user opens and closes a door, the temperature in the box fluctuates, and external high-temperature and high-humidity airflow also flows into the box, so that the frosting rate of the evaporator is relatively high; under the low temperature low humidity operating mode, when there is the user switch door, can lead to the incasement temperature to fluctuate, and the low humid air current of external low temperature also can flow into the incasement for the evaporimeter speed of frosting becomes slow relatively. If the defrosting is performed according to the set time, the refrigerator will perform the defrosting operation only when the evaporator frost layer is thick or perform the defrosting operation when the evaporator frost layer is thin.

The air-cooled refrigerator usually adopts a steel tube heater or a quartz tube heater for defrosting, in order to ensure that a frost layer on an evaporator can be completely removed, an overheating heating method is generally adopted, the defrosting time is too long, the temperature of a freezing storage chamber is easily increased greatly, and the storage quality of foods in the freezing storage chamber is influenced.

Defrosting under the very thick condition of evaporimeter frost layer, can lead to heater open time overlength, increase the power consumption of defrosting in-process, and the heating power of general heater all can be very big, about 200W, open the heater for a long time, still can make heater position local temperature high, the case courage warp and ageing with higher speed, burn out the case courage even, frost layer on the evaporimeter is too thick in addition, can make the wind channel between the fin block, the amount of wind reduces, the result seriously worsens the heat exchange efficiency of evaporimeter, the coefficient of refrigeration of system reduces, the energy consumption increases. Defrosting when the evaporator frost layer is thin, and defrosting operation when defrosting is unnecessary also increases energy consumption, and frequent defrosting has a large influence on the temperature of the storage chamber.

Aiming at the problem that the defrosting control of the refrigerator in the prior art is not accurate enough, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides a refrigerator defrosting control method and device and a refrigerator, and at least solves the problem that the refrigerator defrosting control in the prior art is not accurate enough.

In order to solve the technical problem, an embodiment of the present invention provides a refrigerator defrosting control method, including:

correcting the accumulated working time of the compressor according to information influencing the frosting of the evaporator to obtain the corrected working time of the compressor;

and determining whether to defrost according to the corrected working time of the compressor, the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return inlet of the evaporator.

Optionally, the accumulated working time of the compressor is corrected according to information that affects frosting of the evaporator, so as to obtain corrected working time of the compressor, including:

determining door opening correction time according to the information influencing the frosting of the evaporator;

and calculating to obtain the corrected working time of the compressor according to the accumulated working time of the compressor and the door opening correction time.

Optionally, the information affecting the evaporator frosting includes: room temperature change information caused by door opening; alternatively, the information affecting evaporator frosting comprises: refrigerator external environment information and compartment temperature change information caused by door opening action;

determining door opening correction time according to the information influencing the frosting of the evaporator, comprising the following steps:

detecting a door opening operation, and collecting the temperature of the compartment when the door is opened;

detecting a door closing operation corresponding to the door opening operation, and collecting the temperature of the compartment after the door is closed after a first preset time;

calculating the room temperature change rate according to the room temperature when the door is opened and the room temperature after the door is closed;

and determining the door opening correction time according to the room temperature change rate, or determining the door opening correction time according to the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the room temperature change rate.

Optionally, determining the door opening correction time according to the room temperature change rate includes:

determining an interval where the temperature change rate of the compartment is located according to first pre-stored information, and recording the determined interval as a first target interval;

and determining a time value corresponding to the first target interval according to the first pre-stored information, and taking the time value as the door opening correction time.

Optionally, determining the door opening correction time according to the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the room temperature change rate, including:

respectively determining an interval in which the external environment temperature of the refrigerator is located, an interval in which the external environment humidity of the refrigerator is located and an interval in which the temperature change rate of the compartment is located according to second prestored information, and recording all the determined intervals as second target intervals;

and determining a time value corresponding to the second target interval according to the second pre-stored information, and taking the time value as the door opening correction time.

Optionally, determining the door opening correction time according to the information that affects the evaporator frosting includes: and if the door opening operation is not detected, determining that the door opening correction time is 0.

Optionally, calculating to obtain the corrected operating time of the compressor according to the accumulated operating time of the compressor and the door opening correction time, including:

when the preset time is met, calculating the sum of the current accumulated door opening correction time and the current door opening correction time to obtain new accumulated door opening correction time;

and calculating the sum of the accumulated working time of the compressor and the new accumulated door opening correction time to obtain the corrected working time of the compressor.

Optionally, determining whether to defrost according to the corrected operating time of the compressor, the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the return air inlet of the evaporator, includes:

judging whether the corrected working time of the compressor is greater than or equal to a specified time value or not;

if the corrected working time of the compressor is greater than or equal to the designated time value, determining whether defrosting is started or not according to the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator;

and if the corrected working time of the compressor is less than the specified time value, updating the accumulated door opening correction time.

Optionally, determining whether to defrost according to a temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the return air inlet of the evaporator, includes:

judging whether the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator is less than or equal to a first preset temperature or not;

if the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator is less than or equal to the first preset temperature, defrosting is carried out;

and if the temperature difference between the evaporator inlet pipe temperature and the evaporator return air inlet pipe temperature is greater than the first preset temperature, returning to execute the step of judging whether the temperature difference between the evaporator inlet pipe temperature and the evaporator return air inlet pipe temperature is less than or equal to the first preset temperature.

Optionally, before determining whether the corrected operating time of the compressor is greater than or equal to the specified time value, the method further includes:

determining an interval of the external environment temperature of the refrigerator and an interval of the external environment humidity of the refrigerator according to the third prestored information;

and determining time values corresponding to the interval of the external environment temperature of the refrigerator and the interval of the external environment humidity of the refrigerator according to the third prestored information, wherein the time values are used as the appointed time values.

Optionally, after entering into defrosting, the method further comprises: and if the temperature of the evaporation chamber where the evaporator is located is detected to be greater than or equal to a second preset temperature, or the defrosting time is greater than or equal to a second preset time, the defrosting is quitted.

The embodiment of the invention also provides a defrosting control device of a refrigerator, which comprises:

the correction module is used for correcting the accumulated working time of the compressor according to the information influencing the frosting of the evaporator to obtain the corrected working time of the compressor;

and the determining module is used for determining whether to defrost according to the corrected working time of the compressor, the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the return air inlet of the evaporator.

An embodiment of the present invention further provides a refrigerator, including: the embodiment of the invention relates to a defrosting control device of a refrigerator.

An embodiment of the present invention further provides an electronic device, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment of the invention.

Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method according to the embodiments of the present invention.

By applying the technical scheme of the invention, the accumulated working time of the compressor is corrected according to the information influencing the frosting of the evaporator, so that the corrected working time of the compressor is obtained; and determining whether to defrost according to the corrected working time of the compressor and the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the air return inlet of the evaporator. The defrosting can be cut in more reasonably and accurately, more accurate defrosting control is realized, defrosting under the condition that a frost layer is very thick or the frost layer is very thin is avoided, temperature rise of a chamber during defrosting is reduced, and energy consumption during defrosting is reduced.

Drawings

Fig. 1 is a flowchart of a defrosting control method for a refrigerator according to an embodiment of the present invention;

FIG. 2 is a schematic view of an evaporator assembly provided in accordance with a second embodiment of the present invention;

FIG. 3 is a schematic view of a buckle according to a second embodiment of the present invention;

FIG. 4 is a logic diagram of a defrost control method according to a second embodiment of the present invention;

fig. 5 is a block diagram of a defrosting control device for a refrigerator according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

Example one

Fig. 1 is a flowchart of a defrosting control method for a refrigerator according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:

s101, correcting the accumulated working time of the compressor according to information influencing the frosting of the evaporator to obtain the corrected working time of the compressor.

And S102, determining whether to defrost according to the corrected working time of the compressor and the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the air return inlet of the evaporator.

Among these, the effect on evaporator frosting is primarily on the rate of frosting. Information affecting evaporator frosting includes: room temperature change information caused by door opening; alternatively, the information affecting evaporator frosting includes: the refrigerator includes external environment information of the refrigerator and compartment temperature change information caused by door opening. The external environment information of the refrigerator refers to the environment information of the refrigerator, and comprises the following components: the ambient temperature outside the refrigerator and the ambient humidity outside the refrigerator. The temperature of the external environment of the refrigerator can be collected through a temperature sensor arranged outside the refrigerator, and the humidity of the external environment of the refrigerator is collected through a humidity sensor arranged outside the refrigerator. When the refrigerator is opened, air flow outside the refrigerator can enter the refrigerator, so that the temperature in the refrigerator fluctuates, and the frosting rate of the evaporator can be influenced.

The accumulated working time of the compressor refers to the accumulated running time of starting refrigeration of the compressor after the last defrosting is finished. After defrosting is started each time, the time parameter related to the defrosting can be cleared to ensure that the defrosting judgment is smoothly carried out next time, and specifically, the accumulated working time of the compressor and the corrected working time of the compressor can be cleared when defrosting is started each time or after defrosting is finished each time.

The evaporator inlet tube temperature can be collected by a temperature sensor disposed at the evaporator inlet tube. The temperature of the pipe at the air return opening of the evaporator can be acquired by a temperature sensor which is arranged at the bottom of the evaporator and is right opposite to the air return opening of the refrigerator. The heater for defrosting is arranged at the bottom of the evaporator, and the heater can be a quartz tube heater or a steel tube heater and the like.

Under the normal refrigeration condition of the refrigerator, the temperature of an inlet pipe of the evaporator is very low (such as about-30 ℃), and under the condition that the frost layer is very thin or does not exist, the temperature of the inlet pipe of the evaporator is the return air temperature of the refrigerator (which is almost the same as the temperature set in the freezing chamber, such as-18 ℃). Along with the continuous refrigeration operation of refrigerator, the frost layer on the evaporimeter is constantly thickened, and the frost layer can be lived for the parcel with the temperature sensor who is used for gathering evaporimeter return air inlet department pipe temperature that is located the evaporimeter bottom, and the temperature that this temperature sensor detected this moment will be low a lot, and when the frost layer was enough thick, the temperature that this temperature sensor detected can be very little with evaporimeter import pipe temperature difference, is basically within 1 ℃. Therefore, the frosting condition of the evaporator can be reflected by the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator.

According to the refrigerator defrosting control method, the accumulated working time of the compressor is corrected according to information influencing the frosting of the evaporator, and the corrected working time of the compressor is obtained; and determining whether to defrost according to the corrected working time of the compressor, the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return inlet of the evaporator. The defrosting can be cut in more reasonably and accurately, more accurate defrosting control is realized, defrosting under the condition that a frost layer is very thick or the frost layer is very thin is avoided, temperature rise of a chamber during defrosting is reduced, and energy consumption during defrosting is reduced.

In one embodiment, the step S101 of correcting the accumulated operating time of the compressor according to the information affecting the frosting of the evaporator to obtain the corrected operating time of the compressor includes: determining door opening correction time according to information influencing evaporator frosting; and calculating to obtain the corrected working time of the compressor according to the accumulated working time of the compressor and the door opening correction time. The door opening correction time is used for correcting the accumulated working time of the compressor. According to the embodiment, the door opening correction time is determined based on the information influencing the frosting of the evaporator, the accumulated working time of the compressor is corrected by utilizing the door opening correction time, the factors influencing the thickness of a frost layer are taken into consideration, and the fact that the defrosting is accurately performed can be guaranteed.

In one embodiment, determining a door open correction time based on information affecting evaporator frosting includes: detecting a door opening operation, and collecting the temperature of the compartment when the door is opened; detecting a door closing operation corresponding to the door opening operation, and acquiring the temperature of the compartment after the door is closed after a first preset time; calculating the room temperature change rate according to the room temperature when the door is opened and the room temperature after the door is closed; and determining the door opening correction time according to the room temperature change rate, or determining the door opening correction time according to the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the room temperature change rate.

For example, the detection may be performed by a state of a door switch disposed at a hinge of a door body of the refrigerator, if the door switch is changed from a closed state to an open state, it is considered that the door opening operation is detected, and if the door switch is changed from the open state to the closed state, it is considered that the door closing operation is detected, and for example, it may be determined whether the refrigerator door is opened and whether the refrigerator door is closed by acquiring an image or a video outside the refrigerator and performing image analysis or video analysis.

At least one compartment can be arranged in the refrigerator, and the compartment type can be a refrigerating compartment, a freezing compartment, a temperature changing compartment and the like. Here, the compartment temperatures collected based on the door opening operation and the door closing operation may be temperatures of all compartments in the refrigerator, or may be temperatures of compartments whose temperatures are affected by the current door opening operation.

The first preset time is a time period for the compartment temperature to reach a relatively steady state after the door closing operation, and the first preset time may be set according to the actual condition of the refrigerator, for example, the first preset time may be 10 seconds, 30 seconds, 60 seconds, or the like. Through setting up first time of predetermineeing, after waiting room temperature steady relatively, gather the room temperature behind the closing for the room temperature behind the closing of gathering has more the referential.

For any chamber, the rate of change of the chamber temperature may be a difference between the chamber temperature after the door is closed and the chamber temperature when the door is opened, divided by the door opening duration, where the door opening duration is a time period from a time when the door opening operation is detected to a time when the door closing operation is detected.

The ambient temperature outside the refrigerator and the ambient humidity outside the refrigerator for determining the door opening correction time may be acquired after the door opening operation is detected, or may be acquired after the door closing operation is detected. If the refrigerator external environment temperature and the refrigerator external environment humidity are obtained after the door opening operation is detected so as to determine the door opening correction time, the influence of the door opening process on the refrigerator external temperature and humidity can be avoided.

The method calculates the room temperature change rate caused by the door opening action based on the door opening operation and the door closing operation, the room temperature change rate caused by the door opening action is a factor influencing the thickness of a frost layer, the external environment temperature of the refrigerator and the external environment humidity of the refrigerator are also factors influencing the thickness of the frost layer, the method can determine the door opening correction time based on the room temperature change rate caused by the door opening action, and can also determine the door opening correction time by combining the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the room temperature change rate caused by the door opening action, the method is flexible, more accurate and reliable door opening correction time can be obtained, the accumulated working time of a compressor is corrected, and guarantee is provided for accurate identification of defrosting entry points.

Specifically, the detection of the door opening operation or the door closing operation can be indicated by setting and clearing the related flag, so that the controller executes the corresponding operation according to the related flag, for example, after the door opening operation is detected, the door opening flag is set; after detecting a door closing operation corresponding to the door opening operation, setting a door closing sign and clearing the door opening sign; and clearing the door closing sign after acquiring the room temperature after the door is closed.

Further, determining the door opening correction time according to the room temperature change rate, comprising the following steps: determining an interval in which the temperature change rate of the compartment is positioned according to the first pre-stored information, and recording the determined interval as a first target interval; and determining a time value corresponding to the first target interval according to the first pre-stored information, and taking the time value as the door opening correction time.

The first pre-stored information refers to a corresponding relation between a room temperature change rate interval and door opening correction time which are obtained through a large number of tests in advance. The door opening correction time is used as an output variable, and the room temperature change rate is used as an input variable. The interval division of the input variable (including the number of intervals and the range of each interval) can be set according to the accuracy requirement, for example, the interval division of the input variable is finer, and the output variable is more accurate. For example, the interval of the temperature change rate of the refrigerating chamber can be divided into: positive big, positive middle, positive small, zero, negative big, negative middle and negative small; the interval of the temperature change rate of the freezing room can be divided into: positive big, positive middle, positive small, zero, negative big, negative middle and negative small, wherein positive represents positive number and negative represents negative number; the input variables are arranged and combined, and corresponding output variable door opening correction time is obtained through a large number of tests, wherein the door opening correction time can be a positive number or a negative number, and specifically, the door opening correction time can also correspond to the following values: positive big, positive middle, positive small, zero, negative small, negative middle, negative big.

In the embodiment, a fuzzy control technology is utilized to carry out fuzzy quantitative reasoning on the room temperature change rate caused by the door opening action influencing the thickness of the frost layer so as to obtain first pre-stored information. In the actual refrigerating running process of the refrigerator, according to the temperature change rate of the compartment caused by the door opening action, the corresponding time value can be found from the first prestored information and used as the door opening correction time, so that the door opening correction time can be determined more accurately and reliably based on the factors influencing the thickness of the frost layer.

Tests show that a certain rule exists in the combination of the value of the output variable and each input variable in the first pre-stored information, for example, the priority of the temperature change rate of the freezing room is higher than that of the refrigerating room, namely, the influence of the temperature change rate of the freezing room on the value of the door opening correction time is higher than that of the refrigerating room; if the temperature change rate of the refrigerating chamber and the temperature change rate of the freezing chamber are both negative values, the door opening correction time is a negative value; if the temperature change rate of the refrigerating room and the temperature change rate of the freezing room are both positive values, the door opening correction time is a positive value; if the refrigerating room temperature change rate is a positive value and the freezing room temperature change rate is a negative value, or if the refrigerating room temperature change rate is a negative value and the freezing room temperature change rate is a positive value, the value of the door opening correction time is determined by the specific interval size of the input variable, for example, if the refrigerating room temperature change rate is a positive value, and the freezing room temperature change rate is a negative value, the corresponding door opening correction time is 0, and if the refrigerating room temperature change rate is a negative value, and the freezing room temperature change rate is a positive value, the door opening correction time is 0.

As an example, the first pre-stored information may be as shown in table 1, the content in the bold frame represents the value of the door opening correction time S under the corresponding input variable interval combination.

TABLE 1 schematic table of the first Pre-stored information

For example, the interval division of each input variable and the value of the output variable are shown in table 2.

TABLE 2 INDICATOR TABLE OF INDICATIONS OF INTERVAL RANGE PARTITIONS OF TEMPERATURE CHANGE RATE AND VALUE OF DOOR-OPENING CORRECTION TIME

It should be noted that the door opening correction time S is related to the volume of the refrigerator, and in practical application, the first pre-stored information is determined through a specific test in combination with the volume of the refrigerator. The door opening correction time S in table 2 is a value obtained by performing an experiment in a range of a refrigerator volume of 300L to 400L.

Further, determining the door opening correction time according to the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the room temperature change rate, comprising the following steps: respectively determining an interval of the external environment temperature of the refrigerator, an interval of the external environment humidity of the refrigerator and an interval of the temperature change rate of the compartment according to second prestored information, and recording all the determined intervals as second target intervals; and determining a time value corresponding to the second target interval according to the second pre-stored information, and taking the time value as the door opening correction time.

The second pre-stored information refers to the corresponding relationship of the refrigerator external environment temperature interval, the refrigerator external environment humidity interval, the compartment temperature change rate interval and the door opening correction time which are obtained through a large number of tests in advance. The door opening correction time is used as an output variable and can be obtained according to the following input variables: the ambient temperature outside the refrigerator, the ambient humidity outside the refrigerator, and the rate of change of the compartment temperature. The interval division (including the number of intervals and the range of each interval) of each input variable can be set according to the accuracy requirement, for example, the interval division of the input variable is finer, and the output variable is more accurate. For example, the interval of the external ambient temperature of the refrigerator can be divided into: large, medium and small; the humidity interval of the external environment of the refrigerator can be divided into: large, medium and small; the interval of the temperature change rate of the refrigerating chamber can be divided into: positive big, positive middle, positive small, zero, negative big, negative middle and negative small; the interval of the temperature change rate of the freezing room can be divided into: positive big, positive middle, positive small, zero, negative big, negative middle and negative small, wherein positive represents positive number and negative represents negative number; the input variables are arranged and combined, and corresponding output variable door opening correction time is obtained through a large number of tests, wherein the door opening correction time can be a positive number or a negative number, and specifically, the door opening correction time can also correspond to the following values: positive big, positive middle, positive small, zero, negative small, negative middle, negative big.

In the embodiment, the fuzzy control technology is utilized to carry out fuzzy quantitative reasoning on the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the change rate of the room temperature caused by the door opening action, which influence the thickness of the frost layer, so as to obtain second pre-stored information. In the actual refrigerating running process of the refrigerator, according to the current external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the change rate of the room temperature, a corresponding time value can be found from the second prestored information and used as the door opening correction time, the more input variables are used, the more accurate the determined door opening correction time is, and the more accurate and reliable determination of the door opening correction time based on various factors influencing the thickness of a frost layer is realized.

The combination of the values of the output variables and the intervals of the input variables in the second pre-stored information has a certain rule, wherein the rule between the door opening correction time and the change rate of the temperature of the refrigerating chamber and the change rate of the temperature of the freezing chamber is similar to that of the first pre-stored information, and the rule is adjusted slightly in consideration of the temperature and the humidity of the external environment of the refrigerator.

As an example, a part of the contents of the second pre-stored information is shown in table 3. It should be noted that table 3 is merely an example, and other contents of the second pre-stored information can be obtained through a large number of experiments, which are not all listed herein.

TABLE 3 partial schematic representation of second pre-stored information

The interval division of the refrigerating room temperature change rate Δ Tr and the freezing room temperature change rate Δ Tf in the second pre-stored information is the same as the interval division of the refrigerating room temperature change rate Δ Tr and the freezing room temperature change rate Δ Tf in the first pre-stored information. Illustratively, the interval division of the input variables of the refrigerator external environment temperature T and the refrigerator external environment humidity ζ is shown in table 4.

Table 4 section division table of external ambient temperature T and external ambient humidity ζ of refrigerator

Determining door opening correction time according to information influencing evaporator frosting, comprising the following steps: and if the door opening operation is not detected, determining that the door opening correction time is 0. The condition that the door opening operation is not detected indicates that the door opening phenomenon does not exist in the refrigeration running process of the refrigerator, the temperature change of the compartment temperature caused by the door opening is avoided, the door opening correction time is considered to be 0 at the moment, and the reliability of the door opening correction time determination is ensured.

In one embodiment, the calculating the corrected operating time of the compressor according to the accumulated operating time of the compressor and the door opening correction time comprises: when the preset time is met, calculating the sum of the current accumulated door opening correction time and the current door opening correction time to obtain new accumulated door opening correction time; and calculating the sum of the accumulated working time of the compressor and the new accumulated door opening correction time to obtain the corrected working time of the compressor.

In the refrigeration running process of the refrigerator, whether door opening operation exists can be detected all the time, and therefore door opening correction time can be determined in time according to the door opening operation. The preset time is a time for calculating the accumulated door opening correction time, the accumulated door opening correction time may be periodically calculated according to a preset period, or the accumulated door opening correction time may be calculated after the door opening operation is detected and the corresponding door opening correction time is determined, that is, the preset time may be a preset period, or may be after the door opening operation is detected and the corresponding door opening correction time is determined. The preset period may be set according to actual conditions, for example, the preset period may be set to 3min, 5min, and the like.

After defrosting is carried out each time, the accumulated door opening correction time can be cleared. Specifically, the accumulated door opening correction time may be cleared when defrosting is performed each time or after defrosting is completed each time. The current accumulated door opening correction time is the accumulated door opening correction time calculated last time. After the compressor starts cooling each time, if the door opening correction time t0 is calculated for the first time, the current accumulated door opening correction time is 0, and after calculation, the new accumulated door opening correction time is t 0. The accumulated door opening correction time can be a positive number or a negative number.

In the embodiment, the accumulated working time of the compressor is corrected by accumulating the door opening correction time, so that the defrosting control can be more accurately performed based on the corrected working time of the compressor.

In one embodiment, the step S102 of determining whether to enter the defrost according to the temperature difference between the corrected operating time of the compressor and the temperature of the inlet pipe of the evaporator and the temperature of the return air inlet pipe of the evaporator includes: judging whether the corrected working time of the compressor is greater than or equal to a specified time value or not; if the corrected working time of the compressor is greater than or equal to the specified time value, determining whether defrosting is started or not according to the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return inlet of the evaporator; and if the corrected working time of the compressor is less than the specified time value, updating the accumulated door opening correction time.

Wherein the designated time value is a time value determined according to an external ambient temperature of the refrigerator and an external ambient humidity of the refrigerator. If the corrected working time of the compressor is greater than or equal to the designated time value, the compressor is indicated to be long in continuous working time and possibly needs defrosting, and whether defrosting is carried out or not can be further determined according to the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the return air inlet of the evaporator. And if the corrected working time of the compressor is less than the designated time value, indicating that defrosting is not needed, under the condition, storing the new accumulated door opening correction time obtained by the calculation, waiting for the next preset opportunity, ensuring the timely update of the accumulated door opening correction time, and further ensuring the accuracy of the corrected working time of the compressor.

According to the embodiment, under the condition that the corrected working time of the compressor is greater than or equal to the specified time value, whether defrosting is started or not is further determined according to the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator, and accurate defrosting can be guaranteed; and under the condition that the corrected working time of the compressor is less than the specified time value, updating the accumulated door opening correction time in time so as to ensure the accuracy of the corrected working time of the compressor.

Further, according to the temperature difference of the temperature of the evaporator inlet pipe and the temperature of the pipe at the evaporator return air inlet, whether the defrosting is carried out or not is determined, and the defrosting method comprises the following steps: judging whether the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return inlet of the evaporator is less than or equal to a first preset temperature or not; if the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return opening of the evaporator is less than or equal to a first preset temperature, defrosting is carried out; and if the temperature difference between the temperature of the evaporator inlet pipe and the temperature of the evaporator return air inlet is greater than the first preset temperature, returning to execute the step of judging whether the temperature difference between the temperature of the evaporator inlet pipe and the temperature of the evaporator return air inlet is less than or equal to the first preset temperature or not.

The first preset temperature may be set according to the operation condition of the refrigerator, for example, the first preset temperature may be set to 2 ℃. If the temperature difference between the temperature of the evaporator inlet pipe and the temperature of the evaporator return air inlet pipe is smaller than or equal to a first preset temperature, the fact that the temperature sensor which is located at the bottom of the evaporator and used for collecting the temperature of the evaporator return air inlet pipe is wrapped by a frost layer is indicated, the frost layer is thick, defrosting is needed, and the compressor can be controlled to stop, the fan can stop, and the heater can be controlled to open to defrost. If the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator is larger than a first preset temperature, it is indicated that the evaporator does not frost or a frost layer formed by the evaporator is thin, defrosting is not needed, and the judgment of the temperature difference and the first preset temperature can be continued at the moment.

This embodiment passes through the difference in temperature of evaporimeter import pipe temperature and evaporimeter return air inlet department pipe temperature and confirms whether get into the defrosting, can accurate discernment defrosting entry point.

Further, before determining whether the corrected operating time of the compressor is greater than or equal to the specified time value, the method further includes: determining an interval of the external environment temperature of the refrigerator and an interval of the external environment humidity of the refrigerator according to the third prestored information; and determining time values corresponding to the interval in which the external environment temperature of the refrigerator is located and the interval in which the external environment humidity of the refrigerator is located as the designated time values according to the third prestored information.

The third pre-stored information refers to a corresponding relationship between the refrigerator external environment temperature interval and the refrigerator external environment humidity interval obtained through a large number of tests in advance and the designated time value. For example, the temperature interval of the external environment of the refrigerator can be divided into: large, medium and small; the humidity interval of the external environment of the refrigerator can be divided into: large, medium and small; the intervals are arranged and combined, and a corresponding designated time value is obtained through a large number of tests. Different combinations correspond to different assigned time values.

In the embodiment, the fuzzy control technology is utilized to carry out fuzzy quantitative reasoning on the external environment temperature and the external environment humidity of the refrigerator so as to obtain third pre-stored information. In the actual refrigerating operation process of the refrigerator, according to the current external environment temperature and external environment humidity of the refrigerator, the corresponding specified time value can be found from the second prestored information, and therefore whether defrosting is started or not is judged based on the specified time value.

As an example, the third pre-stored information may be as shown in table 5.

TABLE 5 schematic representation of the third Pre-stored information

Illustratively, the values of the specified time value t are shown in table 6. The section division of the refrigerator external environment temperature T and the refrigerator external environment humidity zeta in the third pre-stored information is the same as the section division of the refrigerator external environment temperature T and the refrigerator external environment humidity zeta in the second pre-stored information.

TABLE 6 value schematic table of designated time value t

It should be noted that the designated time value t is related to the volume of the refrigerator, and in practical application, the second pre-stored information is determined by a specific experiment in combination with the volume of the refrigerator. The specified time value t in table 6 is a value obtained by performing an experiment in which the refrigerator capacity is in the range of 300L to 400L.

After entering into defrosting, still include: and if the temperature of the evaporation chamber where the evaporator is located is detected to be greater than or equal to a second preset temperature, or the defrosting time is greater than or equal to a second preset time, the defrosting is quitted, and the refrigeration operation is recovered.

Wherein, the temperature of the evaporation chamber in which the evaporator is located can be collected by a temperature sensor arranged in the evaporation chamber. The second preset temperature can be set according to the specific situation of the refrigerator, and generally the second preset temperature is set to be above 0 ℃, for example, the second preset temperature can be set to be 6 ℃, 8 ℃ or 10 ℃ or the like. If the temperature of the evaporation chamber where the evaporator is located is greater than or equal to the second preset temperature, it is indicated that the temperature of the evaporation chamber where the evaporator is located is too high, if heating and defrosting are continued, temperature fluctuation of the refrigerator compartment in the defrosting process exceeds a threshold (such as 3 ℃), at the moment, heating needs to be stopped, namely, the defrosting heater is turned off, defrosting is quitted, and the phenomenon that the temperature fluctuation of the refrigerator compartment is too large due to long-time operation of the defrosting heater, and the storage quality of food materials is affected is prevented. The defrosting time is the time period during which the heater is continuously turned on after entering defrosting. The second preset time is a preset maximum continuous operation time of the heater, and for example, the second preset time may be set to 15 min.

The defrosting exit condition is set in the embodiment, so that the precise defrosting control is realized, and the phenomenon that the local temperature of the heater is too high and even the inner container is burnt out due to the long-time continuous work of the defrosting heater is avoided; meanwhile, the temperature rise of the room temperature caused by long-time work of the heater during defrosting can be effectively reduced, and the energy consumption during defrosting is reduced.

Example two

The following describes the above-mentioned defrosting control method for a refrigerator with reference to a specific embodiment, however, it should be noted that this specific embodiment is only for better describing the present application and should not be construed as a limitation to the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.

Referring to fig. 2, a schematic diagram of an evaporator assembly is shown, comprising: an evaporator inlet tube 1, an evaporator outlet tube 2, a reservoir 3, an evaporator coil 4, fins 5, a left bracket 6, a right bracket 7, a small bracket 8, a snap 9, a first defrost sensor 10, a second defrost sensor 11, and a heater 12 (e.g., a steel tube heater). The first defrost sensor 10 is fixed to the evaporator inlet pipe 1 by a clip 9 for detecting a pipe temperature at the evaporator inlet pipe 1, as shown in fig. 3, the clip 9 includes: the first bayonet 91 is used for fixing the bayonet 9 on the inlet pipe 1 of the evaporator, and the second bayonet 92 is used for installing the first defrosting sensor 10. The second defrost sensor 11 is fixed to the bottom of the evaporator at a position facing the return air inlet of the refrigerator for detecting the temperature of the tubes at the return air inlet of the evaporator. The heater 12 is fixed at the bottom of the evaporator through the left bracket 6, the right bracket 7 and the small bracket 8, and has the function of providing heat for defrosting and removing frost on the evaporator.

As shown in fig. 4, a logic diagram of a defrosting control method, taking a refrigerator including a refrigerating compartment and a freezing compartment as an example, includes the following steps:

and S401, refrigerating operation of the refrigerator.

S402, detecting the external environment temperature T of the refrigerator through an external environment temperature sensor, detecting the external environment humidity zeta of the refrigerator through an external environment humidity sensor, and determining the designated time value T according to the external environment temperature T of the refrigerator and the external environment humidity zeta of the refrigerator.

S403, detecting whether the refrigerator has a door opening phenomenon in the refrigerating operation process, if so, entering S404, and if not, entering S418.

S404, setting a door opening mark.

S405, the refrigerator external environment temperature T, the refrigerator external environment humidity ζ, the refrigerating compartment temperature Tr1, and the freezing compartment temperature Tf1 when the door is opened are detected.

And S406, detecting whether the refrigerator is closed, if so, entering S407, and if not, indicating that the refrigerator is not closed after being opened, continuously detecting whether the refrigerator is closed until the refrigerator is detected to be closed, and executing the subsequent operation.

And S407, setting a door closing mark and clearing the door opening mark.

S408, 60 seconds after closing the door (corresponding to the first preset time), the refrigerating compartment temperature Tr2 and the freezing compartment temperature Tf2 are detected.

S409, when the refrigerating compartment temperature Tr2 and the freezing compartment temperature Tf2 after the door is completely closed are detected, the door closing flag is cleared, and the refrigerating compartment temperature change rate Δ Tr and the freezing compartment temperature change rate Δ Tf are calculated.

And S410, carrying out fuzzy quantization, and obtaining the door opening correction time S according to the external environment temperature T of the refrigerator, the external environment humidity zeta of the refrigerator, the room temperature change rate delta Tr of the refrigerating room and the room temperature change rate delta Tf of the freezing room.

S411 calculates the accumulated door opening correction time Sc, which is S + S0, according to the door opening correction time S, where S0 represents the accumulated door opening correction time calculated last time (i.e., the current accumulated door opening correction time).

S412 calculates the compressor correction operating time S1, S1 being Se + Sc, based on the compressor cumulative operating time Se and the cumulative door opening correction time Sc.

S413, detecting whether the compressor correction operation time S1 is greater than or equal to the predetermined time value t, if yes, proceeding to S414, otherwise, proceeding to S419.

And S414, detecting whether the difference value between the evaporator inlet pipe temperature Th1 acquired by the first defrosting sensor 10 and the evaporator air return inlet pipe temperature Th2 acquired by the second defrosting sensor 11 is less than or equal to a first preset temperature T1, if so, entering S415, and if not, continuously detecting the difference value between Th1 and Th2 until the difference value is less than or equal to the first preset temperature T1, and then executing the defrosting operation.

S415, the compressor is stopped, the fan is stopped, the heater 12 is turned on, and the defrosting operation is performed.

S416, detecting the temperature Th3 of the evaporating chamber where the evaporator is located when the refrigerator carries out defrosting operation, and stopping the operation of the heater 12 when Th3 is greater than or equal to a second preset temperature T2; alternatively, when the heater 12 operation time t1 is greater than or equal to the set maximum heater continuous operation time tmax (corresponding to the above-described second preset time), the heater 12 stops operating.

S417, the heater 12 stops operating. And (4) resetting the corrected working time S1 of the compressor, exiting the defrosting operation of the refrigerator, starting the compressor, starting the fan and recovering the refrigerating operation.

And S418, if the refrigerator does not have a door opening phenomenon in the refrigerating operation process, the refrigerating room temperature change rate delta Tr and the freezing room temperature change rate delta Tf are not changed by default, namely the default door opening correction time S is 0.

S419 sets the timer S0, where S0 is Sc, i.e., S0 is equal to the cumulative door opening correction time Sc calculated this time.

In the control logic, the output variable door opening correction time S is obtained according to the input variables of the external environment temperature T of the refrigerator, the external environment humidity zeta of the refrigerator, the temperature change rate delta Tr of the refrigerating chamber and the temperature change rate delta Tf of the freezing chamber. The external environment temperature T of the refrigerator can be divided into: large, medium and small; the humidity ζ of the external environment of the refrigerator can be divided into: large, medium and small; the temperature change rate Δ Tr of the refrigerating chamber can be divided into: positive big, positive middle, positive small, zero, negative big, negative middle and negative small; the rate of change Δ Tf in freezing compartment temperature can be classified as: positive big, positive middle, positive small, zero, negative big, negative middle, negative small. The corresponding output variable door opening correction time S is obtained through a large number of tests by arranging and combining the input variables, wherein S can be a positive number or a negative number.

Obtaining a designated time value T according to the external environment temperature T of the refrigerator and the external environment humidity zeta of the refrigerator, wherein the external environment temperature T of the refrigerator can be divided into: large, medium and small; the humidity ζ of the external environment of the refrigerator can be divided into: large, medium and small. Different combinations of the external ambient temperature T and the external ambient humidity ζ of the refrigerator result in different specified time values T.

And fuzzy reasoning is carried out on the temperature of the external environment of the refrigerator, the humidity of the external environment of the refrigerator and the temperature change condition of the internal room of the refrigerator which influence the thickness of the frost layer by utilizing a fuzzy control technology. Taking a refrigerator comprising a refrigerating chamber and a freezing chamber as an example, input variables of fuzzy control are as follows: the refrigerator comprises a refrigerator external environment temperature T, a refrigerator external environment humidity zeta, a refrigerating room temperature change rate delta Tr and a freezing room temperature change rate delta Tf; the output variables are: and (5) correcting the time S when the door is opened.

The input variable and the output variable adopt a multi-layer and multi-rule structure. In the multi-layer multi-rule structure, the upper layers of the control rules are: taking the external environment temperature T and the external environment humidity zeta of the refrigerator as input variables, and determining a designated time value T according to different state values of the external environment temperature T and the external environment humidity zeta of the refrigerator; the lower layers of the control rule are: the output variable door opening correction time S is determined by using the refrigerator external environment temperature T, the refrigerator external environment humidity ζ, the refrigerating compartment temperature change rate Δ Tr, and the freezing compartment temperature change rate Δ Tf as input variables.

The embodiment provides an intelligent defrosting control method for a refrigerator based on fuzzy control, which can accurately identify defrosting entry points through the correction working time S1 of a compressor and the temperature difference between the temperature of an inlet pipe of an evaporator and the temperature of a return air inlet pipe of the evaporator, reasonably cut in defrosting and flexibly control the defrosting of the evaporator, thereby realizing more accurate defrosting, avoiding defrosting under the condition of very thick frost layer or defrosting under the condition of very thin frost layer, reducing the temperature rise of a chamber during defrosting and reducing the energy consumption during defrosting. In addition, the defrosting exit condition is set, so that accurate defrosting is realized, and the phenomenon that the local temperature of the heater is too high and even the inner container is burnt out due to the long-time continuous work of the defrosting heater is avoided; meanwhile, the temperature rise of the room temperature caused by long-time work of the heater during defrosting can be effectively reduced, and the energy consumption during defrosting is reduced.

EXAMPLE III

Based on the same inventive concept, the embodiment provides a refrigerator defrosting control device, which can be used for implementing the refrigerator defrosting control method described in the embodiment. The device may be implemented by software and/or hardware, and the device may be generally integrated into a controller of the refrigerator.

Fig. 5 is a block diagram of a defrosting control device for a refrigerator according to a third embodiment of the present invention, and as shown in fig. 5, the device includes:

the correction module 51 is used for correcting the accumulated working time of the compressor according to the information influencing the frosting of the evaporator to obtain the corrected working time of the compressor;

and the determining module 52 is used for determining whether to enter defrosting according to the corrected working time of the compressor, the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the return air inlet of the evaporator.

Optionally, the modification module 51 includes:

the first determining unit is used for determining door opening correction time according to the information influencing the frosting of the evaporator;

and the calculating unit is used for calculating and obtaining the corrected working time of the compressor according to the accumulated working time of the compressor and the door opening correction time.

the first determination unit includes:

the first acquisition subunit is used for detecting door opening operation and acquiring the temperature of the compartment when the door is opened;

the second acquisition subunit is used for detecting door closing operation corresponding to the door opening operation, and acquiring the temperature of the compartment after the door is closed after first preset time;

the first calculating subunit is used for calculating the room temperature change rate according to the room temperature when the door is opened and the room temperature after the door is closed;

and the first determining subunit is used for determining the door opening correction time according to the room temperature change rate, or determining the door opening correction time according to the external environment temperature of the refrigerator, the external environment humidity of the refrigerator and the room temperature change rate.

Optionally, the first determining subunit is specifically configured to: determining an interval where the temperature change rate of the compartment is located according to first pre-stored information, and recording the determined interval as a first target interval; and determining a time value corresponding to the first target interval according to the first pre-stored information, and taking the time value as the door opening correction time.

Optionally, the first determining subunit is specifically configured to: respectively determining an interval in which the external environment temperature of the refrigerator is located, an interval in which the external environment humidity of the refrigerator is located and an interval in which the temperature change rate of the compartment is located according to second prestored information, and recording all the determined intervals as second target intervals; and determining a time value corresponding to the second target interval as the door opening correction time according to the second pre-stored information.

Optionally, the first determining unit includes: and the second determining subunit is used for determining that the door opening correction time is 0 if the door opening operation is not detected.

Optionally, the computing unit includes:

the second calculating subunit is used for calculating the sum of the current accumulated door opening correction time and the current door opening correction time when the preset time is met to obtain new accumulated door opening correction time;

and the third calculation subunit is used for calculating the sum of the accumulated working time of the compressor and the new accumulated door opening correction time to obtain the corrected working time of the compressor.

Optionally, the determining module 52 includes:

the judging unit is used for judging whether the corrected working time of the compressor is greater than or equal to a specified time value or not;

the second determining unit is used for determining whether defrosting is started or not according to the temperature difference between the inlet pipe temperature of the evaporator and the pipe temperature at the air return inlet of the evaporator if the corrected working time of the compressor is greater than or equal to the specified time value;

and the updating unit is used for updating the accumulated door opening correction time if the corrected working time of the compressor is less than the specified time value.

Optionally, the second determining unit includes:

the judging subunit is used for judging whether the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator is less than or equal to a first preset temperature or not;

the control subunit is used for defrosting if the temperature difference between the temperature of the inlet pipe of the evaporator and the temperature of the pipe at the air return inlet of the evaporator is less than or equal to the first preset temperature;

and the return subunit is used for returning to the judgment subunit to execute the step of judging whether the temperature difference between the evaporator inlet pipe temperature and the evaporator return air inlet pipe temperature is less than or equal to a first preset temperature or not if the temperature difference between the evaporator inlet pipe temperature and the evaporator return air inlet pipe temperature is greater than the first preset temperature.

Optionally, the determining module 52 further includes:

a third determining unit, configured to determine, according to third pre-stored information, an interval in which the external environment temperature of the refrigerator is located and an interval in which the external environment humidity of the refrigerator is located before determining whether the corrected operating time of the compressor is greater than or equal to the specified time value;

and a fourth determining unit configured to determine, as the designated time value, a time value corresponding to an interval in which the external environment temperature of the refrigerator is located and an interval in which the external environment humidity of the refrigerator is located, according to the third prestored information.

Optionally, the defrosting control device for a refrigerator further comprises:

and the control module is used for exiting defrosting if the temperature of the evaporation chamber where the evaporator is located is detected to be greater than or equal to a second preset temperature or the defrosting time is greater than or equal to a second preset time after the evaporator enters defrosting.

The refrigerator defrosting control device can execute the refrigerator defrosting control method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.

Example four

The embodiment provides a refrigerator including: the defrosting control device for the refrigerator in the embodiment.

EXAMPLE five

The embodiment provides an electronic device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment.

EXAMPLE six

The present embodiment provides a non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program is configured to implement the steps of the method of the above embodiment when executed by a processor.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A defrosting control method for a refrigerator is characterized by comprising the following steps:

determining whether defrosting is started or not according to the corrected working time of the compressor and the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a pipe at an air return inlet of the evaporator;

wherein, according to the information that influences the evaporimeter frosting, revise the accumulative total operating time of compressor, obtain the compressor and revise operating time, include:

calculating to obtain the corrected working time of the compressor according to the accumulated working time of the compressor and the door opening correction time;

the information affecting evaporator frosting includes: room temperature change information caused by door opening; alternatively, the information affecting evaporator frosting comprises: refrigerator external environment information and compartment temperature change information caused by door opening;

detecting a door closing operation corresponding to the door opening operation, and acquiring the temperature of the compartment after the door is closed after a first preset time;

2. The method of claim 1, wherein determining the door open correction time based on the rate of change of the compartment temperature comprises:

3. The method of claim 1, wherein determining the door opening correction time according to the ambient temperature outside the refrigerator, the ambient humidity outside the refrigerator, and the room temperature change rate comprises:

and determining a time value corresponding to the second target interval as the door opening correction time according to the second pre-stored information.

4. The method of claim 1, wherein determining a door open correction time based on the information affecting evaporator frosting comprises:

and if the door opening operation is not detected, determining that the door opening correction time is 0.

5. The method of claim 1, wherein calculating the corrected operating time of the compressor based on the accumulated operating time of the compressor and the door opening correction time comprises:

6. The method of any one of claims 1 to 5, wherein determining whether to enter defrost based on the compressor correction on time, a temperature difference between an evaporator inlet duct temperature and an evaporator return duct temperature comprises:

7. The method of claim 6, wherein determining whether to enter defrost based on a temperature difference between the evaporator inlet duct temperature and the evaporator return duct temperature comprises:

8. The method of claim 6, prior to determining whether the compressor corrected on time is greater than or equal to a specified time value, further comprising:

9. The method of any of claims 1-5, 7, 8, further comprising, after entering defrost:

and if the temperature of the evaporation chamber where the evaporator is located is detected to be greater than or equal to a second preset temperature, or the defrosting time is greater than or equal to a second preset time, the defrosting is quitted.

10. The method of claim 6, further comprising, after entering defrost:

11. A defrosting control device for a refrigerator, comprising:

the determining module is used for determining whether defrosting is started or not according to the corrected working time of the compressor, the temperature difference between the temperature of an inlet pipe of the evaporator and the temperature of a return air inlet of the evaporator;

the correction module comprises:

the calculating unit is used for calculating and obtaining the corrected working time of the compressor according to the accumulated working time of the compressor and the door opening correction time;

the information affecting evaporator frosting includes: room temperature change information caused by door opening; alternatively, the information affecting evaporator frosting comprises: refrigerator external environment information and compartment temperature change information caused by door opening action;

the first determination unit includes:

the first acquisition subunit is used for detecting door opening operation and acquiring the temperature of the chamber when the door is opened;

12. A refrigerator, characterized by comprising: the defrosting control apparatus for a refrigerator of claim 11.

13. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 10 when executing the computer program.

14. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, performs the steps of the method according to any one of claims 1 to 10.