CN113790570B

CN113790570B - Refrigerator defrosting control method and refrigerator

Info

Publication number: CN113790570B
Application number: CN202110926657.0A
Authority: CN
Inventors: 张宇; 舒宏; 周月飞; 陈辉云
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: 2022-11-25
Anticipated expiration: 2041-08-12
Also published as: CN113790570A

Abstract

The application relates to a refrigerator defrosting control method. The method comprises the following steps: acquiring the state of a door body of a refrigerator compartment; when the door body is in a non-tight closing state, controlling the refrigeration part to be closed, and recording the closing time length; when the door body is in a state of being not tightly closed and the shutdown duration reaches the preset shutdown duration, controlling the refrigeration part to operate; detecting the temperature of a refrigerant inlet pipe end and the temperature of a refrigerant outlet pipe end of an evaporator in a refrigeration part; comparing the temperature of the refrigerant inlet pipe end with a defrosting temperature threshold value, and determining whether to defrost according to the comparison result; and if the defrosting is carried out, determining the electrifying rate of the defrosting heater according to the difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end. The application provides a scheme, can alleviate the increase of frosting volume and control the heater according to the frosting volume condition and defrost, promote defrosting efficiency, improve the efficiency of refrigerator.

Description

Refrigerator defrosting control method and refrigerator

Technical Field

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

Background

The air-cooled refrigerator has an automatic defrosting function, and a heater is generally adopted to defrost. In order to ensure the refrigeration effect and the normal operation of the refrigerator, when a large amount of frost is condensed on the surface of the evaporator, the heater needs to be started to heat the frost in a heat radiation mode so as to achieve the aim of defrosting. However, the heater needs to be opened to match with other refrigeration key components to achieve a good effect, otherwise, the heat generated by the heater and the larger heating power of the heater directly affect the use performance and the energy consumption of the refrigerator, in addition, the heater is opened for a long time to increase the risk that the surface of the inner container of the refrigerator body close to the heater is melted, and when the frost formation amount is increased due to the fact that a user does not tightly close the door of the refrigerator compartment in the actual use process, the heater is not opened timely or the opening duration is short, so that the defrosting requirement cannot be met, and the refrigeration effect of the refrigerator is affected.

In the prior art, in a patent with publication number CN105605847A (direct cooling refrigerator and temperature control method and defrosting method thereof), it is proposed that two or more temperature sensors are used to monitor the temperatures of a refrigeration evaporator and a compartment, respectively, a PCB determines the start-stop control of a compressor according to the comparison between the monitoring data of the temperature sensors and a preset value, and determines whether to start a defrosting procedure or not according to the cumulative power-on time of the refrigerator and whether to end defrosting according to the defrosting time.

The above prior art has the following disadvantages:

the condition that the frost formation amount is increased due to the fact that a refrigerator compartment door is not tightly closed is not considered, and the condition that the refrigerating performance of the refrigerator is affected due to the fact that the defrosting effect is poor because the defrosting is carried out by controlling the working state of a heater is not considered. Therefore, it is required to develop a control method for alleviating the increase of the frost formation and controlling the heater to defrost according to the frost formation situation.

Disclosure of Invention

In order to solve the problems in the related art, the refrigerator defrosting control method can relieve the increase of the frosting amount, control the heater to defrost according to the frosting amount, improve the defrosting efficiency and improve the energy efficiency of the refrigerator.

The first aspect of the present application provides a refrigerator defrosting control method, including:

acquiring the state of a door body of a refrigerator compartment;

when the door body is in a non-tight closing state, controlling the refrigeration part to be closed, and recording the closing time length;

when the door body is in a non-tight closing state and the closing time length reaches the preset closing time length, controlling the refrigeration part to operate;

detecting the temperature of a refrigerant inlet pipe end and the temperature of a refrigerant outlet pipe end of an evaporator in a refrigeration part;

comparing the temperature of the refrigerant inlet pipe end with a defrosting temperature threshold value, and determining whether to defrost according to the comparison result;

and if the defrosting is carried out, determining the electrifying rate of the defrosting heater according to the difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end.

In one embodiment, the refrigerator compartment comprises a cold storage compartment and a freezer compartment;

the refrigerating part comprises a compressor, a refrigerating air door and a freezing fan;

controlling a refrigeration component to shut down, comprising:

controlling the compressor and the freezing fan to be shut down, and controlling the refrigerating fan to be closed; the freezing fan is used for blowing cold air in the freezing chamber into the refrigerating chamber through the refrigerating air door.

In one embodiment, controlling the operation of a refrigeration component comprises:

controlling the compressor to operate according to a preset rotating speed for a preset operation duration, wherein the preset rotating speed is less than the initial rotating speed of the compressor;

judging whether the door body state of the refrigerating chamber is the state of untight closing;

if so, controlling the freezing fan to start and controlling the refrigerating air door to open;

if not, the closing state of the freezing fan and the closing state of the refrigerating air door are maintained.

In one embodiment, determining whether to defrost based on the comparison comprises:

if the temperature of the refrigerant inlet pipe end is greater than the defrosting temperature threshold value, defrosting is not carried out, and the refrigerator chamber is controlled to operate according to the factory control strategy of the refrigerator;

and if the temperature of the refrigerant inlet pipe end is less than or equal to the defrosting temperature threshold, defrosting.

In one embodiment, determining the energization rate of the defrosting heater according to a difference between the refrigerant inlet pipe end temperature and the refrigerant outlet pipe end temperature includes:

shutting down the compressor and the freezing fan and closing the refrigerating air door;

subtracting the temperature of the outlet pipe end of the refrigerant from the temperature of the inlet pipe end of the refrigerant to obtain the temperature difference of the evaporator;

comparing the temperature difference of the evaporator with a temperature difference threshold value, and determining the electrifying rate according to the comparison result; the temperature difference threshold includes a first temperature difference threshold and a second temperature difference threshold.

In one embodiment, determining the power-on rate according to the comparison result includes:

judging whether the current temperature difference of the evaporator is greater than or equal to a first temperature difference threshold value or not, if so, the electrifying rate is d1;

if not, judging whether the current evaporator temperature difference is smaller than a first temperature difference threshold value and larger than or equal to a second temperature difference threshold value, if so, the electrifying rate is d2;

if not, judging whether the temperature difference of the current evaporator is smaller than a second temperature difference threshold value, if so, the electrifying rate is d3, and turning off the defrosting heater until the temperature of the inlet pipe end of the refrigerant is larger than the defrosting temperature threshold value;

the first temperature difference threshold value is greater than the second temperature difference threshold value, and the second temperature difference threshold value is greater than zero;

d1 is greater than d2 is greater than d3, and d3 is greater than zero.

In one embodiment, after acquiring the state of the door body of the refrigerator compartment, the method further comprises the following steps:

and if the door body state is a closed state, controlling the refrigerator compartment to operate according to a factory control strategy, and executing the steps of detecting the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end of the evaporator in the refrigeration part.

A second aspect of the present application provides a refrigerator, comprising:

a refrigerating compartment 1 and a freezing compartment 2;

the door body door frames of the cold storage chamber 1 and the freezing chamber 2 are respectively provided with a proximity switch 3, and the proximity switches 3 are used for detecting the state of the door bodies;

a refrigerating component is arranged in the freezing chamber 2, and comprises an evaporator 4;

a first temperature sensor 41 is arranged at the refrigerant inlet pipe end of the evaporator 4, and a second temperature sensor 42 is arranged at the refrigerant outlet pipe end of the evaporator;

the freezing compartment 2 is provided with a defrosting heater 5.

In one embodiment, the refrigeration components further include a compressor 6, a refrigeration damper 7, and a freezer fan 8;

the compressor 6 is arranged outside the freezing chamber 2 and is connected with the refrigerant outlet pipe end through a pipeline;

the refrigerating air door 7 and the freezing fan 8 are arranged at the top of the freezing chamber 2, and the freezing fan 8 is used for blowing cold air in the freezing chamber 2 into the refrigerating chamber 1 through the refrigerating air door 7.

In one embodiment, the defrost heater 5 is provided at the bottom of the freezing compartment 2, near the refrigerant outlet end.

The technical scheme provided by the application can comprise the following beneficial effects:

according to the method and the device, whether the door body of the refrigerator compartment is closed tightly by a user is determined by acquiring the door body state of the refrigerator compartment, if the door body state is not closed tightly, the closing of the refrigeration part is controlled, the closing time is recorded, the condition that the frosting amount on the surface of an evaporator in the refrigeration part is increased due to the fact that the door body of the refrigerator compartment is not closed tightly and external humid air enters the interior of the refrigerator compartment is prevented, and the increase speed of the frosting amount is effectively relieved; when the door body is in a non-tight closing state and the closing time reaches the preset closing time, the operation of a refrigeration part needs to be controlled, so that the temperature of the refrigerator compartment is not raised too high, and the condition that the preservation effect of the refrigerator compartment is reduced is avoided; the method comprises the steps of detecting the temperature of a refrigerant inlet pipe end and the temperature of a refrigerant outlet pipe end of an evaporator, determining whether defrosting is needed or not according to the comparison result of the temperature of the refrigerant inlet pipe end and a defrosting temperature threshold value, determining the frosting severity degree of the surface of the evaporator according to the difference value between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end if defrosting is needed, determining the power-on rate of a defrosting heater, accurately controlling the defrosting temperature of the heater to meet the defrosting requirements of the refrigerant inlet pipe end and the refrigerant outlet pipe end of the evaporator at the same time, avoiding the phenomenon that the refrigerating effect of the refrigerator is influenced due to incomplete defrosting of the refrigerant outlet pipe end of the evaporator, preventing the temperature of a refrigerator compartment from generating severe fluctuation, improving the defrosting efficiency and improving the energy efficiency of the refrigerator.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a schematic flow chart of a first embodiment of a refrigerator defrosting control method in an embodiment of the present application;

fig. 2 is a schematic flow chart of a second embodiment of a refrigerator defrosting control method shown in the embodiment of the application;

fig. 3 is a schematic flow chart of a third embodiment of a refrigerator defrosting control method shown in the embodiment of the present application;

fig. 4 is a front structural view of a refrigerator shown in an embodiment of the present application;

fig. 5 is a side view structural view of a refrigerator according to an embodiment of the present application.

Detailed Description

Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Example one

The heat that the defrosting heater of forced air cooling refrigerator produced and great heating power thereof will directly influence the performance and the energy consumption of refrigerator, in addition, the heater is opened for a long time and can be increased and the closer box inner bag surface of heater distance is melted the risk, when because the user does not have the refrigerator compartment door of closing tightly in the in-service use process and lead to the frosting volume to increase, the heater is opened untimely or when opening not enough can not satisfy the defrosting demand, influences refrigerator refrigeration effect.

In view of the above problems, embodiments of the present application provide a refrigerator defrosting control method, which can alleviate an increase in the amount of frost, control a heater to defrost according to the amount of frost, improve defrosting efficiency, and improve energy efficiency of a refrigerator.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic flow chart of a first refrigerator defrosting control method according to an embodiment of the present application.

Referring to fig. 1, an embodiment of a refrigerator defrosting control method according to an embodiment of the present application includes:

101. acquiring the state of a door body of a refrigerator compartment;

the refrigerator compartment refers to a storage space for keeping articles in a constant low temperature state.

In the embodiment of the application, the door state refers to whether a door for closing a refrigerator compartment is closed tightly or not.

102. When the door body is in a non-tight closing state, controlling the refrigeration part to be closed, and recording the closing time length;

the door body state is the state of not being tightly closed, which means that a user does not fully cling the door body to the frame of the refrigerator compartment in the process of closing the refrigerator door, so that a gap is reserved between the refrigerator compartment and the door body, and at the moment, external humid air flows into the refrigerator compartment through the gap and frosts on the surface of a refrigeration part. Therefore, it is necessary to control the cooling unit to be turned off so that the external humid air is not easily frosted and the speed of the increase of the frosting amount is reduced.

The recording of the shutdown time period may be implemented by a clock module provided in the refrigerator controller, or may be implemented in other manners in practical applications, which is not limited herein.

103. When the door body is in a non-tight closing state and the closing time length reaches the preset closing time length, controlling the refrigeration part to operate;

the door body state can cause external humid air to enter the refrigerator chamber when not being tightly closed, and can also cause the loss of refrigerating capacity in the refrigerator chamber, the temperature in the refrigerator chamber rises, when the shutdown time reaches the preset shutdown time, the temperature in the refrigerator chamber can be considered to rise to the level influencing the fresh-keeping effect of articles in the refrigerator chamber, and the refrigerating part needs to be controlled to operate to provide refrigerating capacity so as to ensure the fresh-keeping capacity of the refrigerator chamber.

104. Detecting the temperature of a refrigerant inlet pipe end and the temperature of a refrigerant outlet pipe end of an evaporator in a refrigeration part;

in the embodiment of the application, two temperature sensors are arranged to respectively detect the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end, and the temperature range of the whole surface of the evaporator is monitored to improve the monitoring accuracy of the surface temperature of the evaporator.

105. Comparing the temperature of the refrigerant inlet pipe end with a defrosting temperature threshold value, and determining whether to defrost according to a comparison result;

in the embodiment of the application, a threshold value for judging whether defrosting is performed or not, namely a defrosting temperature threshold value is set, namely if the temperature of a refrigerant inlet pipe end is greater than the defrosting temperature threshold value by default, the frosting amount on the surface of an evaporator is less, and defrosting is not required; that is, if the refrigerant inlet pipe end temperature is lower than the defrosting temperature threshold value, it is determined that the frosting amount on the surface of the evaporator is large and the frosting amount at the refrigerant outlet pipe end reaches the level that needs defrosting.

106. And if the defrosting is carried out, determining the electrifying rate of the defrosting heater according to the difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end.

The difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end can be understood as the uneven degree of the frosting amount at the refrigerant inlet pipe end and the refrigerant outlet pipe end on the surface of the evaporator, the larger the difference is, the more serious the frosting condition at the refrigerant outlet pipe end is indicated, and the defrosting temperature of the defrosting heater can be accurately controlled by adjusting the power-on rate of the defrosting heater according to the difference.

In the embodiment of the present application, the energization rate refers to a ratio between an operation time period and a shutdown time period of the defrosting heater, and for example, assuming that the energization rate is 40%, the defrosting heater is controlled to operate for 4 seconds and shut down for 6 seconds. It should be understood that the specific values in the above exemplary description of the power supply rate may be set according to the actual application in the practical application process, and are not limited herein.

The first embodiment above shows the following advantages:

according to the method and the device, whether the door body of the refrigerator compartment is tightly closed by a user is determined by obtaining the door body state of the refrigerator compartment, if the door body state is not tightly closed, the closing of the refrigeration part is controlled, the closing time is recorded, the condition that the frosting amount on the surface of an evaporator in the refrigeration part is increased due to the fact that the door body of the refrigerator compartment is not tightly closed and external humid air enters the interior of the refrigerator compartment is prevented, and the increase speed of the frosting amount is effectively relieved; when the door body is in a non-tight closing state and the closing time reaches the preset closing time, the operation of a refrigeration part needs to be controlled, so that the temperature of the refrigerator compartment is not raised too high, and the condition that the preservation effect of the refrigerator compartment is reduced is avoided; the method comprises the steps of detecting the temperature of a refrigerant inlet pipe end and the temperature of a refrigerant outlet pipe end of an evaporator, determining whether defrosting is needed or not according to the comparison result of the temperature of the refrigerant inlet pipe end and a defrosting temperature threshold, determining the frosting severity degree of the surface of the evaporator according to the difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end if defrosting is needed, determining the electrifying rate of a defrosting heater, and accurately controlling the defrosting temperature of the heater so as to simultaneously meet the defrosting requirements of the refrigerant inlet pipe end and the refrigerant outlet pipe end of the evaporator, avoiding the phenomenon that the refrigerating effect of the refrigerator is influenced due to incomplete defrosting of the refrigerant outlet pipe end of the evaporator, preventing the temperature of a refrigerator compartment from generating severe fluctuation, improving the defrosting efficiency and improving the energy efficiency of the refrigerator.

Example two

In practical applications, when the door body of the refrigerator compartment is not closed tightly, the operation mode of the refrigeration component needs to be adjusted to reduce the increase speed of the frosting amount and ensure the fresh-keeping capacity of the refrigerator compartment.

Fig. 2 is a schematic flow chart of a second refrigerator defrosting control method according to an embodiment of the present application.

Referring to fig. 2, an embodiment of a refrigerator defrosting control method according to an embodiment of the present application includes:

201. determining the state of a door body of a refrigerator compartment;

in the embodiment of the application, the refrigerator chamber at least comprises a refrigerating chamber and a freezing chamber; the refrigeration components include at least a compressor, a refrigeration damper, and a freezing fan in addition to the evaporator.

When the door body state is the state of not being tightly closed, the door body of the cold storage chamber may not be tightly closed at the moment, and the door body of the freezing chamber may not be tightly closed at the moment, so that the frosting speed of humid air entering the cold storage chamber and the freezing chamber from the outside needs to be reduced at the same time, the compressor is controlled to be shut down, the refrigeration is stopped, the freezing fan is controlled to be shut down, the cold storage air door is controlled to be closed, and the refrigerating capacity of the freezing chamber is prevented from being blown into the cold storage chamber from the cold storage air door through the freezing fan.

If the door body state is a closed state, the refrigerator can normally operate, and the refrigerator compartment is controlled to operate according to a factory control strategy, however, since external humid air is difficult to enter the refrigerator compartment in the using process of the refrigerator, the temperature of a refrigerant inlet pipe end and the temperature of a refrigerant outlet pipe end of an evaporator in a refrigeration part need to be detected, the surface temperature of the evaporator needs to be accurately monitored to determine whether the evaporator needs to be defrosted, and the refrigeration effect of the evaporator is ensured.

202. When the door body is in a non-tight closing state and the closing time length reaches the preset closing time length, controlling the refrigeration part to operate;

in the embodiment of the present application, the preset shutdown time period may be set to be between 20 minutes and 40 minutes, and in practical applications, the preset shutdown time period may be set according to practical application conditions, which is not limited herein.

And controlling the compressor to operate according to the preset rotating speed for a preset operating time, wherein the preset rotating speed is less than the initial rotating speed of the compressor. The preset rotating speed can be set to be two-gear lower than the gear corresponding to the initial rotating speed, but if the space with two-gear lower is not available, the lowest rotating speed of the compressor can be set to operate, the lowest rotating speed needs to be set according to the actual application condition, and the only limitation is not made here.

The preset operation time of the compressor operating according to the preset rotating speed can be set to be 20-30 minutes, and in practical application, the preset operation time can be set according to practical application conditions, and is not limited uniquely here.

In addition, whether the freezing fan and the cold storage air door operate or not needs to be determined by judging whether the door body state of the cold storage chamber is in a non-tight closing state, and the method specifically comprises the following steps: if the door body state of the refrigerating chamber is in the state of not being tightly closed, the freezing fan is controlled to be started and the refrigerating air door is controlled to be opened, refrigerating cold air in the refrigerating chamber is blown into the refrigerating chamber from the refrigerating air door through the freezing fan, and the temperature of the refrigerating chamber is not raised too high to influence the fresh-keeping effect; if the door body state of the refrigerating chamber is in a closed state, the closing state of the freezing fan and the closing state of the refrigerating air door are maintained, and moist air is prevented from entering the refrigerating chamber from the refrigerating air door.

The following advantageous effects can be seen from the second embodiment described above:

when the door body is in a non-tight closing state, the refrigeration parts including the compressor, the cold storage air door and the freezing fan are closed, refrigeration is stopped, the refrigeration quantity of the freezing chamber is prevented from being blown into the cold storage chamber from the cold storage air door through the freezing fan, the speed of frosting of humid air entering the cold storage chamber and the freezing chamber from the outside is reduced, and the frosting quantity is controlled; when the preset shutdown time is reached, the compressor needs to be controlled to operate to start refrigeration, whether a door body of the cold storage chamber is not closed tightly is judged, whether a freezing fan and a cold storage air door operate is determined according to the judgment condition, the temperature in the refrigerator chamber is prevented from being increased too high, and the fresh-keeping effect of the refrigerator chamber is ensured.

EXAMPLE III

In practical applications, the energization rate of the defrosting heater is adjusted according to a temperature difference obtained by subtracting the temperature of the refrigerant outlet pipe end from the temperature of the refrigerant inlet pipe end, so as to accurately control the defrosting temperature of the heater, improve the defrosting efficiency, and improve the energy efficiency of the refrigerator.

Fig. 3 is a schematic flow chart of a third embodiment of a refrigerator defrosting control method according to an embodiment of the present application.

Referring to fig. 3, a third embodiment of a refrigerator defrosting control method according to an embodiment of the present application includes:

301. judging whether defrosting is carried out or not;

if the temperature of the refrigerant inlet pipe end is greater than the defrosting temperature threshold value, defrosting is not carried out, and the refrigerator chamber is controlled to operate according to the factory control strategy of the refrigerator; and if the temperature of the refrigerant inlet pipe end is less than or equal to the defrosting temperature threshold value, defrosting is carried out.

302. Determining a difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end;

in the embodiment of the present application, the temperature of the refrigerant outlet pipe end is subtracted from the temperature of the refrigerant inlet pipe end to obtain the temperature difference of the evaporator, so as to determine the difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end.

303. And determining the electrifying rate of the defrosting heater according to the temperature difference of the evaporator.

After defrosting is determined, the compressor and the freezing fan are shut down, and the refrigerating air door is closed, so that unnecessary power consumption waste caused by simultaneous refrigerating and heating is avoided, and defrosting efficiency and defrosting effect are also influenced.

The evaporator temperature difference is compared with a temperature difference threshold, in the embodiment of the application, the temperature difference threshold includes but is not limited to a first temperature difference threshold and a second temperature difference threshold, and the evaporator temperature difference is divided into a plurality of grades through a plurality of temperature difference thresholds, so that the correct electrification rate of the defrosting heater is accurately corresponded, and the adaptability of the defrosting temperature of the defrosting heater is improved.

The determination process of the power-on rate of the defrosting heater specifically comprises the following steps:

if not, judging whether the current temperature difference of the evaporator is smaller than a second temperature difference threshold value, if so, enabling the power-on rate to be d3, and turning off the defrosting heater until the temperature of the inlet pipe end of the refrigerant is larger than the defrosting temperature threshold value.

In the embodiment of the present application, the frosting condition at the refrigerant outlet pipe end is the most serious, the defrosting heater is disposed at a position close to the refrigerant outlet pipe end, and the heat of the defrosting heater spreads from the refrigerant outlet pipe end to the refrigerant inlet pipe end, so it can be stated that, when the temperature at the refrigerant inlet pipe end is greater than the defrosting temperature threshold, the refrigerant outlet pipe end is sufficiently heated, the frosting amount on the surface of the evaporator is already small or even completely eliminated, the problem of over-high temperature may be caused by further heating, and the defrosting heater does not need to be continuously performed, so the defrosting heater can be turned off.

Wherein the first temperature difference threshold is greater than the second temperature difference threshold, and the second temperature difference threshold is greater than zero; d1 is greater than d2 and greater than d3, and d3 is greater than zero, in this embodiment, the defrost temperature threshold may be set at any value between-1 ℃ and 2 ℃, the first temperature difference threshold may be set at any value between 8 ℃ and 12 ℃, and the second temperature difference threshold may be set at any value between 3 ℃ and 5 ℃; d1 can be set to any value between 70% and 90%, and d2 can be set to any value between 40% and 60%; d3 may be set to any value between 20% and 30%.

It is understood that the above values for the first temperature difference threshold and the second temperature difference threshold, and the values of d1, d2, and d3 are only exemplary, and in practical applications, appropriate values need to be determined according to practical application conditions, which is not limited herein.

The following beneficial effects can be seen from the third embodiment:

the temperature difference of the evaporator is obtained by subtracting the temperature of the outlet pipe end of the refrigerant from the temperature of the inlet pipe end of the refrigerant, after the compressor and the freezing fan are shut down and the refrigerating air door is closed, the temperature difference of the evaporator is compared with a temperature difference threshold value, the power-on rate of the defrosting heater is determined according to the comparison result, when the temperature of the inlet pipe end of the refrigerant is larger than the defrosting temperature threshold value, the defrosting heater is shut down, the adaptive degree of the defrosting temperature of the defrosting heater is improved, the loss of unnecessary power consumption is reduced, the defrosting efficiency and the defrosting effect are improved, the temperature uniformity of a compartment is improved, and the energy efficiency of the refrigerator is improved.

Corresponding to the embodiment of the application function implementation method, the application also provides a refrigerator and a corresponding embodiment.

Example four

Fig. 4 is a front structural view of a refrigerator shown in an embodiment of the present application; fig. 5 is a side view structural view of a refrigerator according to an embodiment of the present application.

Referring to fig. 4 and 5, a refrigerator according to an embodiment of the present application includes:

a refrigerating compartment 1 and a freezing compartment 2; the door body door frames of the cold storage chamber 1 and the freezing chamber 2 are respectively provided with a proximity switch 3, and the proximity switches 3 are used for detecting the state of the door bodies; the proximity switch is a position switch which can be operated without mechanical direct contact with a moving part, and when an object is less than a certain distance from a sensing surface of the proximity switch, the switch can be operated without mechanical contact and any pressure, so that a direct current electric appliance is driven or a control instruction is provided for a computer device.

a first temperature sensor 41 is arranged at the refrigerant inlet pipe end of the evaporator 4, and a second temperature sensor 42 is arranged at the refrigerant outlet pipe end of the evaporator; it is understood that the refrigerant inlet pipe end is the end where the refrigerant enters the evaporator 4, and the refrigerant outlet pipe end is the end where the refrigerant exits the evaporator 4.

The freezing compartment 2 is provided with a defrosting heater 5, and the defrosting heater 5 is used for providing the temperature required for defrosting.

EXAMPLE five

For the sake of understanding, the following provides an example of a refrigerator, and in practical applications, a defrosting heater is disposed near a refrigerant outlet pipe end to perform effective warm defrosting on the refrigerant outlet pipe end where the frost is most serious.

The refrigeration components further comprise, but are not limited to, a compressor 6, a refrigeration damper 7 and a freezing fan 8, wherein the compressor 6 is arranged outside the freezing compartment 2 and is connected with a refrigerant outlet pipe end through a pipeline; the refrigerating air door 7 and the freezing fan 8 are arranged at the top of the freezing chamber 2, and the freezing fan 8 is used for blowing cold air in the freezing chamber 2 into the refrigerating chamber 1 through the refrigerating air door 7.

The defrosting heater 5 is provided at the bottom of the freezing compartment 2 at a position close to the refrigerant outlet pipe end.

Regarding the refrigerator in the fourth and fifth embodiments, the door state is detected by the proximity switch, and the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end are respectively detected by the first temperature sensor and the second sensor, so that the evaporator is monitored more comprehensively and accurately, the defrosting heater can be accurately controlled to defrost, the defrosting efficiency is improved, and unnecessary power consumption is reduced; the defrosting heater is arranged at the bottom of the freezing chamber and close to the end of the refrigerant outlet pipe, so that effective heating defrosting is carried out at the refrigerant outlet pipe end with the most serious defrosting condition, and the condition that the refrigerating effect of the evaporator is reduced due to serious frosting is avoided.

The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.

Furthermore, the method according to the present application may also be implemented as a computer program or computer program product comprising computer program code instructions for performing some or all of the steps of the above-described method of the present application.

Alternatively, the present application may also be embodied as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) having stored thereon executable code (or a computer program, or computer instruction code) which, when executed by a processor of an electronic device (or electronic device, server, etc.), causes the processor to perform some or all of the steps of the above-described method according to the present application.

Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the applications disclosed herein may be implemented as electronic hardware, computer software, or combinations of both.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

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

acquiring the state of a door body of a refrigerator compartment; the refrigerator chamber comprises a refrigerating chamber and a freezing chamber;

when the door body is in a non-tight closing state, controlling the refrigeration part to be closed, and recording the closing time length; the controlling the refrigeration component to shut down comprises: controlling the compressor and the freezing fan to be shut down, and controlling the refrigerating fan to be closed; the freezing fan is used for blowing cold air in the freezing chamber into the refrigerating chamber through the refrigerating air door; the refrigerating part comprises a compressor, a refrigerating air door and a freezing fan;

when the door body state is the state of not being tightly closed and the shutdown duration reaches the preset shutdown duration, controlling the refrigeration part to operate; wherein the controlling the operation of the refrigeration component comprises: controlling the compressor to operate according to a preset rotating speed for a preset operation duration, wherein the preset rotating speed is less than the initial rotating speed of the compressor; judging whether the door body state of the refrigerating chamber is in the untight closing state or not; if so, controlling the freezing fan to start and controlling the refrigerating air door to open; if not, maintaining the shutdown state of the freezing fan and the closing state of the cold storage air door;

detecting a refrigerant inlet pipe end temperature and a refrigerant outlet pipe end temperature of an evaporator in the refrigeration component;

if defrosting is carried out, determining the power-on rate of a defrosting heater according to the difference between the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end;

the determining of the power-on rate of the defrosting heater according to the difference between the refrigerant inlet pipe end temperature and the refrigerant outlet pipe end temperature includes:

turning off the compressor and the freezing fan and closing the refrigerating air door;

subtracting the temperature of the refrigerant outlet pipe end from the temperature of the refrigerant inlet pipe end to obtain an evaporator temperature difference;

comparing the evaporator temperature difference with a temperature difference threshold value, and determining the electrifying rate according to the comparison result; the temperature difference threshold includes a first temperature difference threshold and a second temperature difference threshold.

2. The refrigerator defrosting control method according to claim 1,

the determining whether to defrost according to the comparison result includes:

and if the temperature of the refrigerant inlet pipe end is less than or equal to the defrosting temperature threshold value, defrosting is carried out.

3. The defrosting control method of a refrigerator according to claim 1,

the determining the power-on rate according to the comparison result comprises:

judging whether the current temperature difference of the evaporator is greater than or equal to the first temperature difference threshold value or not, if so, the electrifying rate is d1;

if not, judging whether the current evaporator temperature difference is smaller than the first temperature difference threshold value and larger than or equal to a second temperature difference threshold value, if so, the electrifying rate is d2;

if not, judging whether the temperature difference of the current evaporator is smaller than the second temperature difference threshold value, if so, the electrifying rate is d3, and turning off the defrosting heater until the temperature of the inlet pipe end of the refrigerant is larger than the defrosting temperature threshold value;

the first temperature difference threshold is greater than the second temperature difference threshold, and the second temperature difference threshold is greater than zero;

the d1 is greater than the d2 is greater than the d3, and the d3 is greater than zero.

4. The refrigerator defrosting control method according to claim 2,

after the door body state of the refrigerator compartment is obtained, the method further comprises the following steps:

and if the door body state is a closed state, controlling the refrigerator compartment to operate according to the factory control strategy, and executing the step of detecting the temperature of the refrigerant inlet pipe end and the temperature of the refrigerant outlet pipe end of the evaporator in the refrigeration part.

5. A refrigerator characterized by being configured to perform the method of any one of claims 1 to 4, the refrigerator comprising:

a refrigerating chamber (1) and a freezing chamber (2);

the door body door frames of the cold storage chamber (1) and the freezing chamber (2) are respectively provided with a proximity switch (3), and the proximity switches (3) are used for detecting the state of the door body;

a refrigerating part is arranged in the freezing chamber (2), and comprises an evaporator (4);

a first temperature sensor (41) is arranged at a refrigerant inlet pipe end of the evaporator (4), and a second temperature sensor (42) is arranged at a refrigerant outlet pipe end of the evaporator;

and a defrosting heater (5) is arranged in the freezing chamber (2).

6. The refrigerator according to claim 5,

the refrigeration component also comprises a compressor (6), a refrigeration air door (7) and a freezing fan (8);

the compressor (6) is arranged outside the freezing chamber (2) and is connected with the end of the refrigerant outlet pipe through a pipeline;

the refrigerating air door (7) and the freezing fan (8) are arranged at the top of the freezing chamber (2), and the freezing fan (8) is used for blowing cold air for refrigeration in the freezing chamber (2) into the refrigerating chamber (1) through the refrigerating air door (7).

7. The refrigerator according to claim 5,

the defrosting heater (5) is arranged at the bottom of the freezing chamber (2) and is close to the end of the refrigerant outlet pipe.