CN114427774B

CN114427774B - Refrigerator and temperature control method for warm drawer of refrigerator

Info

Publication number: CN114427774B
Application number: CN202210076880.5A
Authority: CN
Inventors: 杨优生; ***; 孙彬; 石映晖
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2024-04-05
Anticipated expiration: 2042-01-24
Also published as: CN114427774A

Abstract

The invention discloses a refrigerator and a temperature control method of a warm drawer of the refrigerator. According to the real-time temperature and the preset target temperature of the warm-up drawer and the working state of the compressor in the refrigerator, determining a temperature compensation mode of the warm-up drawer, and when the compressor is in a starting state, fully utilizing heat generated by condensation in a refrigerating system, and meanwhile carrying out temperature compensation on the warm-up drawer by means of the action of a warm-up fan; when the compressor is in a stop state, the electric heating wire is used for carrying out compensation heating, so that the temperature of the warm-keeping drawer is kept at a target temperature, and the warm-keeping requirement of food with high temperature requirement is met.

Description

Refrigerator and temperature control method for warm drawer of refrigerator

Technical Field

The invention relates to the technical field of refrigerators, in particular to a refrigerator and a temperature control method of a warm drawer of the refrigerator.

Background

At present, the traditional refrigeration modes of the refrigerator in the market are pure refrigeration modes, and the refrigeration system of the refrigerator comprises: the refrigerator comprises a compressor, a condenser, a capillary tube, an evaporator and an air return pipe, and is combined into a single-system refrigerator, a double-system refrigerator, a multi-system refrigerator, a two-door refrigerator, a three-door refrigerator and a multi-door refrigerator in parallel connection and the like. In a refrigerator refrigeration system, a compressor discharge gas is connected with a condenser to output high-temperature and high-pressure gas, and the high temperature is redundant for the refrigerator refrigeration system and is generally consumed in a mode of enhancing heat transfer so as to be beneficial to the refrigeration system. The traditional household refrigerator only utilizes the refrigeration effect of the refrigeration system to cool and keep fresh for objects in the freezing or refrigerating chamber, utilizes less heating effect of the refrigeration system, does not fully utilize heat generated by condensation in the refrigeration system of the refrigerator, and causes energy waste.

Disclosure of Invention

The embodiment of the invention aims to provide a refrigerator and a temperature control method of a warm-keeping drawer thereof, wherein the warm-keeping drawer with a heat preservation function is arranged in the refrigerator, so that heat generated by condensation in a refrigerating system is fully utilized, and meanwhile, the warm-keeping requirement of foods with high temperature requirements can be met.

To achieve the above object, an embodiment of the present invention provides a refrigerator including:

the warm storage drawer is arranged on one side of a condenser in the refrigerating system and comprises a warm storage accommodating cavity, a drawer main body, a warm storage fan and an electric heating wire, wherein the warm storage fan is arranged between the condenser and the drawer main body, and the electric heating wire is arranged on at least one part of the side face, the bottom and the top of the warm storage accommodating cavity;

the controller is configured to:

acquiring the real-time temperature and the preset target temperature of the warm drawer and the working state of a compressor in the refrigerating system;

and controlling the working mode of the warm-air blower, the working state and the power of the electric heating wire according to the working state of the compressor and the comparison result of the real-time temperature and the target temperature.

As an improvement of the above solution, the refrigerator is provided with an air outlet on a side of the condenser away from the warm drawer, and when the compressor is in a start-up state, the controller is further configured to:

When the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser is less than a preset highest temperature threshold, closing the warm-air blower and closing the air outlet;

when the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser is greater than or equal to a preset highest temperature threshold, closing the warm-air blower and opening the air outlet;

and when the real-time temperature is smaller than the target temperature, starting the warm-air blower and closing the air outlet.

As an improvement of the above, when the compressor is in a start-up state, the controller is further configured to:

when the real-time temperature is greater than or equal to the target temperature and the difference value between the real-time temperature and the target temperature is smaller than a preset first temperature difference threshold value, controlling the warm-air blower to stop working;

when the real-time temperature is greater than or equal to the target temperature and the difference between the real-time temperature and the target temperature is greater than or equal to a preset first temperature difference threshold, controlling the warm-air blower to work in an air draft mode so as to enable the heat of the condenser to be far away from the warm-air drawer;

when the real-time temperature is smaller than the target temperature and the difference value between the real-time temperature and the target temperature is smaller than a preset second temperature difference threshold value, controlling the warm-air blower to work in an air supply mode so as to enable the heat of the condenser to be transferred to the warm-air drawer;

When the real-time temperature is smaller than the target temperature and the difference value between the real-time temperature and the target temperature is larger than or equal to a preset second temperature difference threshold value, controlling the warm-air blower to work in an air supply mode and starting the electric heating wire.

As an improvement to the above, when the compressor is in a stopped state, the controller is further configured to:

when the real-time temperature is greater than or equal to the target temperature, controlling the electric heating wire to keep a closed state;

and when the real-time temperature is smaller than the target temperature, starting the electric heating wire, and controlling the power of the electric heating wire according to the difference value between the real-time temperature and the target temperature.

As an improvement of the above solution, the controlling the power of the electric heating wire according to the difference between the real-time temperature and the target temperature includes:

determining a target temperature difference grade of the difference value between the real-time temperature and the target temperature in a plurality of preset temperature difference grades; wherein, each temperature difference grade corresponds to the power of the electric heating wire, and the temperature value in the temperature grade is in direct proportion to the power of the electric heating wire;

acquiring the corresponding target power of the electric heating wire according to the target temperature difference grade;

And controlling the electric heating wire to work according to the target power.

As an improvement of the scheme, a warm air door is arranged in the warm drawer, the warm air door is arranged between the drawer main body and the warm air blower, the warm air door is closed along with shutdown of the warm air blower, and the warm air blower is opened along with startup of the warm air blower.

In order to achieve the above object, the embodiment of the present invention further provides a temperature control method for a warm-keeping drawer of a refrigerator, where the warm-keeping drawer is disposed at one side of a condenser in a refrigeration system, and includes a warm-keeping accommodating cavity, a drawer main body, a warm-keeping fan and an electric heating wire, where the warm-keeping fan is disposed between the condenser and the drawer main body, and the electric heating wire is disposed at least at one portion of a side surface, a bottom, and a top of the warm-keeping accommodating cavity; the temperature control method includes:

As an improvement of the above solution, the refrigerator is provided with an air outlet on a side of the condenser away from the warm drawer, and when the compressor is in a start-up state, the method further includes:

As an improvement of the above solution, when the compressor is in a start-up state, the method further includes:

As an improvement of the above, when the compressor is in a stopped state, the method further includes:

Compared with the prior art, the refrigerator and the temperature control method of the warm drawer of the refrigerator disclosed by the embodiment of the invention have the advantages that the warm drawer with the heat preservation function is arranged in the refrigerator, and comprises a warm storage accommodating cavity, a drawer main body, a warm storage fan and an electric heating wire. According to the real-time temperature and the preset target temperature of the warm-up drawer and the working state of the compressor in the refrigerator, determining a temperature compensation mode of the warm-up drawer, and when the compressor is in a starting state, fully utilizing heat generated by condensation in a refrigerating system, and meanwhile carrying out temperature compensation on the warm-up drawer by means of the action of a warm-up fan; when the compressor is in a stop state, the electric heating wire is used for carrying out compensation heating, so that the temperature of the warm-keeping drawer is kept at a target temperature, and the warm-keeping requirement of food with high temperature requirement is met.

Drawings

Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention;

FIG. 2 is a schematic view of a warm drawer according to an embodiment of the present invention;

FIG. 3 is a schematic view of a structure of a warm main body in a warm drawer according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a warm drawer provided by an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of a warm drawer 10a provided in accordance with an embodiment of the present invention;

fig. 6 is a flowchart of a temperature control method of a warm drawer of a refrigerator according to an embodiment of the present invention;

FIG. 7 is a flow chart of a method for controlling the temperature of a warm drawer when a compressor is in a start-up state according to an embodiment of the present invention;

FIG. 8 is a flow chart of another method for controlling the temperature of a warm drawer when the compressor is in a start-up state according to an embodiment of the present invention;

FIG. 9 is a flow chart of a method for controlling the temperature of a warm drawer when a compressor is in a shutdown state, provided by an embodiment of the present invention;

fig. 10 is a flowchart for obtaining target power of an electric heating wire according to an embodiment of the present invention.

100 parts of a refrigerator; 10. a warm drawer; a 20 controller; 30. a condenser; 10a, a local enlargement area; 101. a warm storage accommodating cavity; 102. a drawer main body; 103. a warm-air blower; 104. an electric heating wire; 105. a warm-keeping air door; 106. and a return air duct.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, the refrigerator 100 includes a warm drawer 10 and a controller 20, the warm drawer 10 is used for storing food materials with high temperature requirements or thawing frozen food materials, and the controller 20 is used for controlling a working process of the warm drawer 10.

Further, the refrigeration system of the refrigerator 100 according to the embodiment of the present invention is composed of a compressor, a condenser, a dry filter, a capillary tube, and an evaporator, and the working process of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

The compression process comprises the following steps: when the contact of the temperature controller is connected, the compressor starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor, compressed into high-temperature and high-pressure overheat gas in the compressor cylinder and discharged to the condenser; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas is radiated through the condenser, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated steam, the saturated steam is further cooled into saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as condensation temperature, and the pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid is filtered by a drying filter to remove moisture and impurities, and then flows into a capillary tube, throttling and depressurization are carried out through the capillary tube, and the refrigerant is changed into wet vapor at normal temperature and low pressure; the evaporation process is as follows: the wet vapor at normal temperature and low pressure starts to absorb heat in the evaporator for vaporization, so that the temperature of the evaporator and the surrounding temperature are reduced, the refrigerant is changed into low-temperature and low-pressure gas, the refrigerant coming out of the evaporator returns to the compressor again, the process is repeated, and the heat in the refrigerator is transferred to the air outside the refrigerator, so that the purpose of refrigeration is achieved.

Referring to fig. 2, fig. 2 is a schematic structural view of a warm drawer 10 according to an embodiment of the present invention, and the warm drawer 10 includes at least one warm storage compartment 101 and a drawer body 102 disposed in each of the warm storage compartments 101. It should be noted that, in the embodiment of the present invention, the number of the warm keeping drawers 10 is one, but in other embodiments, the number of the warm keeping drawers 10 may be two, and the present invention is not limited herein. It will be appreciated that when the two warm-keeping drawers 10 are provided, the temperatures in the two drawer bodies 102 may be controlled individually or in a unified manner by the controller 20, and each warm-keeping drawer 10 is provided with a warm-keeping fan and an electric heating wire, respectively, so that the independent temperature control of the controller 20 may be achieved.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a drawer main body 102 in the warm keeping drawer 10 according to the embodiment of the present invention, a notch is disposed on a side of the drawer main body 102 opposite to a drawer door, the notch is used for ventilation, and heat emitted by a condenser can enter the drawer main body 102 through the notch. Slide rails are respectively arranged below two sides of the drawer main body 102, and correspond to the slide rails arranged below the heating storage accommodating cavity 101, so that the drawer main body 102 can be dragged in a push-pull manner.

Referring to fig. 4-5, fig. 4 is a cross-sectional view of a warm drawer 10 provided in an embodiment of the present invention; fig. 5 is a partial enlarged view of a portion 10a of the warm-keeping drawer 10 in fig. 4 according to an embodiment of the present invention, the warm-keeping drawer 10 is disposed on one side of a condenser 30 in a refrigeration system, the warm-keeping drawer 10 includes a warm-keeping accommodating cavity 101, a drawer main body 102, a warm-keeping fan 103, and an electric heating wire 104, wherein the warm-keeping fan 103 is disposed between the condenser 30 and the drawer main body 102, the electric heating wire 104 is disposed on at least one portion of a side, a bottom, and a top of the warm-keeping accommodating cavity 101, and in fig. 5, the electric heating wire 104 is disposed on the bottom of the warm-keeping accommodating cavity 101, which is worth noting that the electric heating wire 104 is not disposed on a side with a notch.

Further, the warm-keeping drawer 10 further includes a warm-keeping air door 105 and a return air duct 106, the warm-keeping air door 105 is disposed between the drawer main body 102 and the warm-keeping fan 103, the warm-keeping air door 105 is closed along with shutdown of the warm-keeping fan 103, and the warm-keeping fan 103 is opened along with startup of the warm-keeping fan 103. The warm air door 105 and the return air duct 106 constitute an air passage so that warm air can flow in the warm drawer 10.

Still further, the warm-air drawer 10 is further provided with an air purifying device (not shown), in which activated carbon may be contained, and the air purifying device is disposed at one side of the warm-air blower 103.

The controller 20 is configured to:

Illustratively, the target temperature is a temperature set by a user or a system-customized temperature (for example, 19 ℃), when the refrigerator is started to operate, the warm-up drawer 10 starts to operate according to the system-customized temperature, the warm-up fan 103 starts to operate by default, and the warm-up damper 105 is opened. According to the real-time temperature and the preset target temperature of the warm-keeping drawer 10 and the working state of the compressor in the refrigerator, determining a temperature compensation mode for the warm-keeping drawer 10, and when the compressor is in a starting state, fully utilizing heat generated by condensation in a refrigerating system, and simultaneously carrying out temperature compensation on the warm-keeping drawer 10 by virtue of the action of the warm-keeping fan 103; when the compressor is in a stop state, the electric heating wire 104 is used for carrying out compensation heating, so that the temperature of the warm-up drawer 10 is kept at a target temperature, and the warm-up requirement of foods with high temperature requirements is met.

Optionally, when the compressor is in a start-up state, the embodiment of the present invention provides two temperature compensation modes, one is a temperature compensation mode that does not need to use the electric heating wire 104, and the other is a temperature compensation mode that does need to use the electric heating wire 104.

In an alternative embodiment, the refrigerator is provided with an air outlet (not shown) at a side of the condenser 30 away from the warm drawer 10, and the controller 20 is further configured to, when the compressor is in a start-up state:

when the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser 30 is less than a preset maximum temperature threshold, closing the warm-air blower 103 and closing the air outlet;

when the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser 30 is greater than or equal to a preset maximum temperature threshold, closing the warm-air blower 103 and opening the air outlet;

and when the real-time temperature is smaller than the target temperature, starting the warm-air blower 103 and closing the air outlet.

For example, the air outlet may discharge excessive heat while fresh air may be periodically sucked into the warm storage compartment through the air outlet. When the real-time temperature is greater than or equal to the target temperature, it indicates that the heat emitted by the condenser 30 is greater, and the air supply of the warm-air blower 103 is not needed, at this time, the warm-air blower 103 and the warm-air door 105 are closed, and at the same time, the real-time temperature is less than a preset maximum temperature threshold, which indicates that the temperature of the warm-air drawer 10 can be reduced by closing the warm-air blower 103 and the warm-air door 105, so that the air outlet needs to be closed. When the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser is greater than or equal to a preset maximum temperature threshold, it indicates that the heat emitted by the condenser 30 is very large, and at this time, it is necessary to not only close the warm-air blower 103, but also open the air outlet to dissipate the heat of the condenser 30. When the real-time temperature is less than the target temperature, it indicates that heat emitted by the condenser 30 is needed, and the warm-air blower 103 is turned on and the air outlet is turned off.

In another alternative embodiment, the controller 20 is further configured to, when the compressor is in a start-up state:

For example, the warm-air blower 103 may be operated in an air-draft mode when rotated counterclockwise and in an air-supply mode when rotated clockwise, and the first temperature difference threshold and the second temperature difference threshold may be set according to specific use conditions, for example, each set to 5 ℃ or other values, which is not particularly limited herein.

When the real-time temperature is greater than or equal to the target temperature and the difference between the real-time temperature and the target temperature is smaller than the first temperature difference threshold, it indicates that the heat emitted by the condenser 30 is more, and the air supply of the warm storage fan 103 is not needed, and at this time, the warm storage fan 103 is closed to cool the warm storage drawer 10. When the real-time temperature is greater than or equal to the target temperature and the difference between the real-time temperature and the target temperature is greater than or equal to the first temperature difference threshold, it indicates that the heat emitted by the condenser 30 is very large, and if the warm-air blower 103 is only turned off, the real-time temperature still cannot be equal to the target temperature, so that the warm-air blower 103 is controlled to operate in the air suction mode, so that the heat of the condenser 30 is far away from the warm-air drawer 10. When the real-time temperature is less than the target temperature and the difference between the real-time temperature and the target temperature is less than the second temperature difference threshold, it indicates that the heat emitted by the condenser 30 is enough to make the real-time temperature equal to the target temperature, and the warm-air blower 103 is controlled to operate in the air supply mode, so that the heat of the condenser 30 is transferred to the warm-air drawer 10. When the real-time temperature is less than the target temperature and the difference between the real-time temperature and the target temperature is greater than or equal to the second temperature difference threshold, it indicates that the air supply by the warm-air blower 103 alone cannot make the real-time temperature equal to the target temperature, and at this time, the electric heating wires 104 need to be used for heating together. It should be noted that, at this time, the electric heating wire 104 may operate in a low power mode, so as to avoid the excessive temperature of the warm drawer 10 caused by the excessive power, and the electric heating wire 104 is turned off after the real-time temperature is equal to the target temperature.

Optionally, when the compressor is in a shutdown state, the controller 20 is further configured to:

when the real-time temperature is greater than or equal to the target temperature, controlling the electric heating wire 104 to keep a closed state;

and when the real-time temperature is smaller than the target temperature, starting the electric heating wire 104, and controlling the power of the electric heating wire 104 according to the difference value between the real-time temperature and the target temperature.

Illustratively, when the compressor is just stopped, the real-time temperature of the warm-up drawer 10 may be greater than or equal to the target temperature, and the electric heating wire 104 may still be kept in a closed state. As the downtime of the compressor increases, the condenser 30 also stops working, and at this time, the real-time temperature of the warm-up drawer 10 gradually decreases, and when the real-time temperature is less than the target temperature, the electric heating wire 104 is turned on to perform the compensation heating.

Further, the controlling the power of the electric heating wire 104 according to the difference between the real-time temperature and the target temperature includes:

determining a target temperature difference grade of the difference value between the real-time temperature and the target temperature in a plurality of preset temperature difference grades; wherein, each temperature difference grade corresponds to the power of the electric heating wire 104, and the temperature value in the temperature grade is in direct proportion to the power of the electric heating wire 104;

Acquiring the corresponding target power of the electric heating wire 104 according to the target temperature difference grade;

the electric heating wire 104 is controlled to operate according to the target power.

For example, because the amount of heating needed is large when the user uses the defrosting function, the electric heating wire 104 should be provided with at least two different power gears (two corresponding temperature difference levels), for example, when only heating is needed by heating and preserving heat, the temperature difference is small, and the low-power heating wire can be started; if the user uses the defrosting function, the temperature difference is larger at this time, and the heating wire with larger power should be started for auxiliary compensation heating.

Further, when the compressor is in a stop state and the electric heating wire 104 works, the warm air blower 103 can be started together to supply air, so that warm air circulates in the warm air drawer 10, and the temperature in the warm air drawer 10 can be kept balanced.

Compared with the prior art, the refrigerator disclosed by the embodiment of the invention has the advantages that the warm storage drawer with the heat preservation function is arranged in the refrigerator, and comprises the warm storage accommodating cavity, the drawer main body, the warm storage fan and the electric heating wire. According to the real-time temperature and the preset target temperature of the warm-up drawer and the working state of the compressor in the refrigerator, determining a temperature compensation mode of the warm-up drawer, and when the compressor is in a starting state, fully utilizing heat generated by condensation in a refrigerating system, and meanwhile carrying out temperature compensation on the warm-up drawer by means of the action of a warm-up fan; when the compressor is in a stop state, the electric heating wire is used for carrying out compensation heating, so that the temperature of the warm-keeping drawer is kept at a target temperature, and the warm-keeping requirement of food with high temperature requirement is met.

Referring to fig. 6, fig. 6 is a flowchart of a temperature control method of a refrigerator warm drawer according to an embodiment of the present invention, where the temperature control method is implemented by a controller in a refrigerator, and the temperature control method of the refrigerator warm drawer includes steps S1 to S2:

s1, acquiring real-time temperature and preset target temperature of the warm drawer and acquiring working state of a compressor in the refrigerating system;

s2, controlling the working mode of the warm-air blower, the working state and the power of the electric heating wire according to the working state of the compressor and the comparison result of the real-time temperature and the target temperature.

The warm drawer comprises at least one warm storage accommodating cavity and a drawer main body arranged in each warm storage accommodating cavity. It should be noted that, in the embodiment of the present invention, the number of the warm storage drawers is one, but in other embodiments, the number of the warm storage drawers may be two, which is not specifically limited herein. It can be understood that when the two warm-keeping drawers are arranged, the temperatures in the two drawer bodies can be controlled independently or uniformly through the controller, and each warm-keeping drawer is respectively and correspondingly provided with a warm-keeping fan and an electric heating wire, so that the independent temperature control of the controller can be realized.

The drawer is characterized in that a notch is arranged on one side, opposite to the drawer door, of the drawer main body, the notch is used for ventilation, and heat emitted by the condenser can enter the drawer main body through the notch. The drawer body is characterized in that sliding rails are respectively arranged below two sides of the drawer body and correspond to the sliding rails arranged below the middle of the warm storage accommodating cavity, and the drawer body can be dragged in a push-pull mode. The warm-keeping drawer is arranged on one side of a condenser in the refrigerating system and further comprises a warm-keeping fan, an electric heating wire, a warm-keeping air door and a return air duct, wherein the warm-keeping fan is arranged between the condenser and the drawer main body, the electric heating wire is arranged on at least one part of the side face, the bottom and the top of the warm-keeping accommodating cavity, the warm-keeping air door is arranged between the drawer main body and the warm-keeping fan, the warm-keeping air door is closed along with the shutdown of the warm-keeping fan, the warm-keeping fan is opened along with the startup of the warm-keeping fan, and the warm-keeping air door and the return air duct form a gas channel, so that warm air can flow in the warm-keeping drawer.

The target temperature is a temperature set by a user or a system customized temperature (such as 19 ℃), when the refrigerator starts to operate, the warm-up drawer starts to operate according to the system customized temperature, the warm-up fan starts to operate by default, and the warm-up air door is opened. According to the real-time temperature and the preset target temperature of the warm-up drawer and the working state of the compressor in the refrigerator, determining a temperature compensation mode of the warm-up drawer, and when the compressor is in a starting state, fully utilizing heat generated by condensation in a refrigerating system, and meanwhile carrying out temperature compensation on the warm-up drawer by means of the action of a warm-up fan; when the compressor is in a stop state, the electric heating wire is used for carrying out compensation heating, so that the temperature of the warm-keeping drawer is kept at a target temperature, and the warm-keeping requirement of food with high temperature requirement is met.

Referring to fig. 7, fig. 7 is a flowchart of a method for controlling a temperature of a warm drawer when a compressor is in a start-up state, and when the compressor is in the start-up state, the method further includes steps S211 to S213:

s211, when the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser is less than a preset temperature maximum threshold, closing the warm-air blower and closing the air outlet;

s212, when the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser is greater than or equal to a preset highest temperature threshold, closing the warm-air blower and opening the air outlet;

s213, when the real-time temperature is smaller than the target temperature, starting the warm-air blower and closing the air outlet.

The refrigerator is provided with an air outlet at one side of the condenser far away from the warm storage drawer, and the air outlet can discharge surplus heat and can regularly suck fresh air into the warm storage compartment through the air outlet. When the real-time temperature is greater than or equal to the target temperature, the fact that the heat emitted by the condenser is more is indicated, air supply of the warm-air blower is not needed, the warm-air blower and the warm-air door are closed at the moment, meanwhile, the real-time temperature is smaller than a preset highest temperature threshold, the fact that the temperature of the warm-air drawer can be reduced in a mode of closing the warm-air blower and the warm-air door is indicated, and therefore the air outlet is needed to be closed. When the real-time temperature is greater than or equal to the target temperature and the temperature of the condenser is greater than or equal to a preset highest temperature threshold, the fact that the heat emitted by the condenser is very large is indicated, and at the moment, not only the warm-air blower needs to be closed, but also the air outlet needs to be opened to radiate the condenser. And when the real-time temperature is smaller than the target temperature, indicating that the heat emitted by the condenser is needed at the moment, starting the warm-air blower at the moment and closing the air outlet.

Referring to fig. 8, fig. 8 is a flowchart of another temperature control method of a warm drawer when the compressor is in a start-up state, and when the compressor is in a start-up state, the method further includes steps S221 to S224:

s221, when the real-time temperature is greater than or equal to the target temperature and the difference value between the real-time temperature and the target temperature is smaller than a preset first temperature difference threshold value, controlling the warm-air blower to stop working;

s222, when the real-time temperature is greater than or equal to the target temperature and the difference value between the real-time temperature and the target temperature is greater than or equal to a preset first temperature difference threshold value, controlling the warm-air blower to work in an air draft mode so as to enable the heat of the condenser to be far away from the warm-air drawer;

s223, when the real-time temperature is smaller than the target temperature and the difference value between the real-time temperature and the target temperature is smaller than a preset second temperature difference threshold value, controlling the warm-air blower to work in an air supply mode so as to enable the heat of the condenser to be transferred to the warm-air drawer;

and S224, controlling the warm-air blower to work in an air supply mode and starting the electric heating wire when the real-time temperature is smaller than the target temperature and the difference value between the real-time temperature and the target temperature is larger than or equal to a preset second temperature difference threshold value.

The heating fan is operated in an air draft mode when rotated counterclockwise and in an air supply mode when rotated clockwise, and the first temperature difference threshold and the second temperature difference threshold may be set according to specific use conditions, for example, the first temperature difference threshold and the second temperature difference threshold are both set to 5 ℃ or other values, which is not particularly limited herein.

When the real-time temperature is greater than or equal to the target temperature, and the difference between the real-time temperature and the target temperature is smaller than the first temperature difference threshold, the fact that the heat emitted by the condenser is more is indicated, air supply of the warm storage fan is not needed, and at the moment, the warm storage fan is closed to achieve cooling of the warm storage drawer. When the real-time temperature is greater than or equal to the target temperature and the difference between the real-time temperature and the target temperature is greater than or equal to the first temperature difference threshold, the heat emitted by the condenser is shown to be very large, and at the moment, if the warm-air blower is only turned off, the real-time temperature still cannot be enabled to be equal to the target temperature, so that the warm-air blower is controlled to work in an air draft mode, and the heat of the condenser is enabled to be far away from the warm-air drawer. When the real-time temperature is smaller than the target temperature and the difference between the real-time temperature and the target temperature is smaller than the second temperature difference threshold, the heat emitted by the condenser is enough to enable the real-time temperature to be equal to the target temperature, and the warm-air blower is controlled to work in an air supply mode at the moment, so that the heat of the condenser is transferred to the warm-air drawer. When the real-time temperature is smaller than the target temperature and the difference between the real-time temperature and the target temperature is larger than or equal to the second temperature difference threshold, the fact that the real-time temperature is equal to the target temperature only by the air supply of the warm-air blower can not be achieved is indicated, and meanwhile, the electric heating wire is needed to be used for heating together. It is worth to be noted that, at this time, the electric heating wire may be operated in a low power mode, so that the temperature of the warm drawer is prevented from being too high due to too high power, and the electric heating wire is turned off after the real-time temperature is equal to the target temperature.

Referring to fig. 9, fig. 9 is a flowchart of a method for controlling a temperature of a warm drawer when a compressor is in a stopped state, and when the compressor is in a stopped state, the method further includes steps S231 to S232:

s231, when the real-time temperature is greater than or equal to the target temperature, controlling the electric heating wire to keep a closed state;

and S232, when the real-time temperature is smaller than the target temperature, starting the electric heating wire, and controlling the power of the electric heating wire according to the difference value of the real-time temperature and the target temperature.

For example, when the compressor is just stopped, the real-time temperature of the warm-up drawer may be greater than or equal to the target temperature, and the electric heating wire still remains in a closed state. And when the real-time temperature is smaller than the target temperature, the electric heating wire is started to carry out compensation heating.

Referring to fig. 10, fig. 10 is a flowchart of obtaining a target power of an electric heating wire according to an embodiment of the present invention, in step S232, the controlling the power of the electric heating wire according to the difference between the real-time temperature and the target temperature includes steps S2321 to S2323:

S2321, determining a target temperature difference grade of a difference value between the real-time temperature and the target temperature in a plurality of preset temperature difference grades; wherein, each temperature difference grade corresponds to the power of the electric heating wire, and the temperature value in the temperature grade is in direct proportion to the power of the electric heating wire;

s2322, obtaining the corresponding target power of the electric heating wire according to the target temperature difference grade;

s2323, controlling the electric heating wire to work according to the target power.

For example, because the amount of heating needed is large when the user uses the defrosting function, the electric heating wire should be provided with at least two different power gears (two corresponding temperature difference levels are also provided), if only heating is needed for warm-keeping and heat-preserving auxiliary heating, the temperature difference is small at this time, and the low-power heating wire can be started; if the user uses the defrosting function, the temperature difference is larger at this time, and the heating wire with larger power should be started for auxiliary compensation heating.

Further, when the compressor is in a stop state and the electric heating wire works, the warm air storage fan can be started together to supply air, so that warm air circulates in the warm air storage drawer, and the temperature in the warm air storage drawer can be kept balanced.

Compared with the prior art, the temperature control method of the refrigerator warm drawer disclosed by the embodiment of the invention has the advantages that the warm drawer with the heat preservation function is arranged in the refrigerator, and comprises a warm storage accommodating cavity, a drawer main body, a warm storage fan and an electric heating wire. According to the real-time temperature and the preset target temperature of the warm-up drawer and the working state of the compressor in the refrigerator, determining a temperature compensation mode of the warm-up drawer, and when the compressor is in a starting state, fully utilizing heat generated by condensation in a refrigerating system, and meanwhile carrying out temperature compensation on the warm-up drawer by means of the action of a warm-up fan; when the compressor is in a stop state, the electric heating wire is used for carrying out compensation heating, so that the temperature of the warm-keeping drawer is kept at a target temperature, and the warm-keeping requirement of food with high temperature requirement is met.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims

1. A refrigerator, comprising:

The controller is configured to:

controlling the working mode of the warm-air blower, the working state and the power of the electric heating wire according to the working state of the compressor and the comparison result of the real-time temperature and the target temperature;

wherein, the refrigerator is equipped with the air exit in the condenser keep away from the side of warm drawer, when the compressor is in the start-up state, the controller still is configured to:

2. The refrigerator of claim 1, wherein when the compressor is in a start-up state, the controller is further configured to:

3. The refrigerator of claim 1, wherein when the compressor is in a shutdown state, the controller is further configured to:

4. The refrigerator of claim 3, wherein said controlling the power of the electric heating wire according to the difference between the real-time temperature and the target temperature comprises:

5. The refrigerator of claim 1, wherein a warm air door is provided in the warm drawer, the warm air door being provided between the drawer main body and the warm air blower, the warm air door being closed as the warm air blower is turned off, and the warm air blower being opened as the warm air blower is turned on.

6. The temperature control method of the warm-keeping drawer of the refrigerator is characterized in that the warm-keeping drawer is arranged on one side of a condenser in a refrigerating system and comprises a warm-keeping accommodating cavity, a drawer main body, a warm-keeping fan and an electric heating wire, wherein the warm-keeping fan is arranged between the condenser and the drawer main body, and the electric heating wire is arranged on at least one part of the side face, the bottom and the top of the warm-keeping accommodating cavity; the temperature control method includes:

the refrigerator is provided with an air outlet at one side of the condenser far away from the warm-keeping drawer, and when the compressor is in a starting state, the method further comprises the following steps:

7. The method of controlling temperature of a warm drawer of a refrigerator of claim 6, wherein when the compressor is in a start-up state, the method further comprises:

8. The method of controlling temperature of a warm drawer of a refrigerator of claim 6, wherein when the compressor is in a stopped state, the method further comprises: