CN111473572A

CN111473572A - Refrigerator control method and refrigerator

Info

Publication number: CN111473572A
Application number: CN201910065340.5A
Authority: CN
Inventors: 姬立胜; 李伟; 戚斐斐; 聂圣源; 陈建全
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Co Ltd
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2020-07-31
Anticipated expiration: 2039-01-23
Also published as: CN111473572B

Abstract

The invention provides a refrigerator and a control method thereof. The refrigerator comprises a cooling chamber provided with an evaporator, a preservation box internally provided with a closed preservation space, an air duct communicated with the cooling chamber, and a fan for promoting cold air in the cooling chamber to enter the air duct, wherein the preservation box is provided with an air inlet communicated with the air duct and an air outlet communicated with the cooling chamber; the control method comprises the following steps: acquiring the surface temperature of the evaporator during the state that the evaporator is in a stop operation state; judging whether the surface temperature falls into a preset temperature range or not; if so, the fan is started and the air inlet and the air outlet are opened so as to replace the air in the fresh-keeping space. The invention solves the problem that water is easy to accumulate in the preservation box.

Description

Refrigerator control method and refrigerator

Technical Field

The invention relates to a refrigerating and freezing device, in particular to a control method of a refrigerator and the refrigerator.

Background

Some existing refrigerators are provided with a sealed preservation box, and oxygen in the box is pumped out to form a gas atmosphere beneficial to food preservation.

Because of the preservation box is inside inclosed, the user is to wherein after putting into a large amount of green fruit, vegetables, because biological respiratory, will release a large amount of moisture, makes the humidity in the space reach 100% very easily, then produces the condensation, leads to ponding in the fresh-keeping space, influences the result of use.

Disclosure of Invention

The invention aims to provide a control method of a refrigerator, which aims to solve the problem that water is easy to accumulate in a fresh-keeping box.

Another object of the present invention is to provide a refrigerator capable of implementing the above control method.

On one hand, the invention provides a control method of a refrigerator, the refrigerator comprises a cooling chamber provided with an evaporator, a preservation box provided with a closed preservation space, an air duct communicated with the cooling chamber and a fan for promoting cold air in the cooling chamber to enter the air duct, wherein the preservation box is provided with an air inlet communicated with the air duct and an air outlet communicated with the cooling chamber; the control method comprises the following steps:

acquiring the surface temperature of the evaporator during the state that the evaporator is in a stop operation state;

judging whether the surface temperature falls into a preset temperature range or not;

if so, the fan is started and the air inlet and the air outlet are opened so as to replace the air in the fresh-keeping space.

Optionally, on the premise that the surface temperature is judged to fall within the preset temperature range, acquiring the relative humidity of the air in the fresh-keeping space, and judging whether the relative humidity falls within the preset humidity range;

if so, executing the steps of starting the fan and opening the air inlet and the air outlet.

Optionally, after the step of turning on the blower and opening the air inlet and the air outlet, the method further includes:

and when the surface temperature is higher than the preset temperature range and the relative humidity is lower than the preset humidity range, the fan is turned off, and the air inlet and the air outlet are closed.

and after the fan is started and the air inlet and the air outlet are opened for a preset time, the fan is stopped and the air inlet and the air outlet are closed.

Optionally, the preset temperature range is-5 to 0 ℃; and the preset humidity range is 95-100%.

In another aspect, the present invention also provides a refrigerator, comprising:

a cooling chamber in which an evaporator is disposed;

the preservation box is internally provided with a closed preservation space;

the air duct is communicated with the cooling chamber;

the fan is used for promoting cold air in the cooling chamber to enter the air channel, the preservation box is provided with an air inlet to be communicated with the air channel, and an air outlet to be communicated with the cooling chamber; and

a controller comprising a memory and a processor, the memory having a computer program stored therein, and the computer program, when executed by the processor, being for implementing the control method according to any one of the preceding claims.

Optionally, the air duct is defined by an air duct component, the air duct component is vertically arranged in the refrigerator, the bottom of the air duct component is spaced from the bottom wall of the refrigerator, a first refrigerating chamber is arranged in front of the air duct component, and a cooling chamber is arranged behind the air duct component;

the fan is arranged on the rear wall of the air duct and used for blowing the cold air of the cooling chamber into the air duct;

the front wall of the air duct is provided with at least one compartment air supply outlet communicated with the first refrigerating compartment, and the first refrigerating compartment is communicated with the cooling compartment through the lower part of the air duct component for returning air; and is

The preservation box is arranged at the bottom in the first refrigerating chamber, the upper part of the preservation box is attached to the front wall of the air duct, the air inlet is arranged at the upper part of the rear wall of the preservation box to be communicated with the air duct, and the air outlet is arranged at the lower part of the rear wall of the preservation box to be communicated with the cooling chamber below the air duct component.

Optionally, the first refrigerated compartment is a refrigerated compartment.

Optionally, the refrigerator further comprises an air pump for increasing the nitrogen concentration in the fresh-keeping space and a gas-regulating membrane module, wherein the air pump is configured to pump the gas in the fresh-keeping space outwards so that the air in the fresh-keeping space flows to the gas-regulating membrane module, and part or all of the oxygen-enriched gas in the air in the fresh-keeping space is discharged out of the fresh-keeping space through the air pump under the action of the gas-regulating membrane module.

Optionally, the suction pump is configured to be opened with the air inlet and the air outlet in a closed state.

According to the control method, when the evaporator does not refrigerate, the air inlet and the air outlet of the fan and the preservation box are opened, so that air circulation is performed between the preservation box and the cooling chamber, high-humidity air in the preservation box is discharged to the cooling chamber, air with relatively low humidity in the cooling chamber flows into the preservation box, and the purpose of reducing the relative humidity of the air in the preservation space is achieved. Thereby avoiding the problems of condensation and water accumulation caused by high relative humidity of air in the preservation box.

Furthermore, the control method of the invention simultaneously increases the detection of the relative humidity of the air under the precondition of judging the surface temperature of the evaporator, and the air replacement is carried out on the preservation box when the air and the air meet the conditions, thereby realizing more accurate control.

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

Drawings

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

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

FIG. 2 is a schematic block diagram of a refrigerator according to one embodiment of the present invention;

fig. 3 is a schematic view of a control method of a refrigerator according to one embodiment of the present invention;

fig. 4 is a flowchart of a control method of a refrigerator according to one embodiment of the present invention;

fig. 5 is a flowchart of a control method of a refrigerator according to another embodiment of the present invention.

Detailed Description

The embodiment of the invention firstly provides a control method of a refrigerator. Fig. 1 is a schematic view of a structure of a refrigerator according to one embodiment of the present invention, and fig. 2 is a schematic block diagram of the refrigerator according to one embodiment of the present invention.

As shown in fig. 1, the refrigerator includes a cabinet 100, a cooling compartment 600, an evaporator 500, a fresh food box 200, an air duct 301, and a blower fan 400. The evaporator 500 is a part of a vapor compression refrigeration cycle system, which is provided in the cooling compartment 600 to produce cold air when the compressor is operated. The air duct 301 communicates with the cooling compartment 600 to output cool air in the cooling compartment 600, and guides the cool air into each cooling compartment inside the refrigerator to cool food. The air duct 301 is also used to guide cool air into the fresh food box 200 for cooling the fresh food box 200. The fan 400 is used to force the cool air in the cooling compartment 600 into the air duct 301. It can be understood that when the fan 400 is turned on, the forced convection of air is realized, and the cold air in the cooling chamber 600 continuously enters the air duct 301. When the fan 400 is turned off, the airflow is substantially stopped, and the cool air in the cooling chamber 600 rarely enters the air duct 301. The preservation box 200 is disposed inside the refrigerator, and a sealed preservation space 201 is formed therein for placing fresh vegetables, fruits, and the like. The preservation box 200 is provided with an air inlet 210 to communicate with an air duct 301 for introducing cold air for refrigeration. The fresh-keeping box 200 is further provided with an air outlet 220 to discharge relatively hot air in the fresh-keeping space 201 after heat exchange, and finally, the air flows back to the cooling chamber 600, so that air flow circulation is realized.

Fig. 3 is a schematic view of a control method of a refrigerator according to one embodiment of the present invention. As shown in fig. 3, the control method of the present invention may include the steps of:

step S302: acquiring a surface temperature of the evaporator 500 during a stop operation state of the evaporator 500;

step S304: judging whether the surface temperature of the evaporator 500 falls within a preset temperature range;

step S306: if so, the blower 400 is turned on and the air inlet 210 and the air outlet 220 are opened to replace the air in the fresh-keeping space 201.

In the above-described steps, the period in which the evaporator 500 is stopped refers to a period in which the compressor is stopped after the temperature inside the cooling compartment of the refrigerator reaches the set temperature. At this time, the evaporator 500 is still in a relatively cold state, i.e., there is still some residual cooling.

The surface temperature of the evaporator can be obtained using the temperature sensor 910. The temperature sensor 910 may be a temperature sensor that is native to the evaporator and is used to detect temperature for defrosting control of the refrigerator.

The air inlet 210 and the air outlet 220 may be respectively provided with an electric damper to be controlled by a motor to complete opening or closing.

Because the preservation box 200 is always in a closed state, the vegetables and fruits in the preservation box can generate water vapor due to respiration. So that the relative humidity inside the crisper 200 is high (even often up to 100%), condensation and water accumulation often occur. In the above control method, when the evaporator 500 does not cool, the fan 400 is turned on, and the air inlet 210 and the air outlet 220 of the crisper 200 are opened, so as to promote air circulation between the crisper 200 and the cooling compartment 600. Thereby discharging relatively humid air inside the crisper 200 to the cooling compartment 600 and allowing relatively dry air inside the cooling compartment 600 to enter the crisper 200. That is, it is equivalent to exchanging relatively humid air inside the crisper 200 for the cooling compartment 600 and introducing relatively dry air into the cooling compartment 600. Thus, the purpose of reducing the relative humidity of air in the preservation space 201 is achieved, and the problems of condensation and water accumulation caused by overhigh relative humidity of air in the preservation box 200 are avoided.

In the above control method, the air exchange step is limited to be performed only when the surface temperature of the evaporator 500 is within the preset temperature range. This is because, if the surface temperature of the evaporator 500 is lower than the lower limit value of the preset temperature range, the temperature of the air in the cooling compartment 600 is too low, and the vegetable and fruit may be frostbitten by introducing the air into the fresh food box 200. If the surface temperature of the evaporator 500 is higher than the upper limit of the preset temperature range, the temperature of the air in the cooling chamber 600 is relatively high, and the introduction of the air into the preservation box 200 causes the temperature of the air in the preservation box 200 to be suddenly increased, which is also not beneficial to the preservation of food. Through the experiment of the inventor, the preset temperature range can be set to be-5-0 ℃ more appropriately.

In some optional embodiments, the steps may be further optimized and configured to achieve a better technical effect, and the following describes the control method of the refrigerator of this embodiment in detail with reference to an optional execution flow of this embodiment, where this embodiment is merely an illustration of the execution flow, and in a specific implementation, an execution sequence and an operation condition of some steps may be modified according to specific implementation requirements.

Fig. 4 is a flowchart of a control method of a refrigerator according to one embodiment of the present invention. As shown in fig. 4, the control method of this embodiment sequentially performs the following steps:

step S402: acquiring the surface temperature of the evaporator 500 and the relative humidity of the air in the fresh keeping space 201 during the period that the evaporator 500 is in the stop operation state;

step S404: judging whether the surface temperature of the evaporator 500 falls within a preset temperature range and whether the relative humidity of the air in the fresh-keeping space 201 falls within a preset humidity range are simultaneously established; if both are true, go to step S406. If not, go to step S402 to continue monitoring the surface temperature and the relative humidity.

Step S406: the blower 400 is turned on and the air inlet 210 and the air outlet 220 are opened to replace the air in the fresh food space 201.

In this embodiment, the air exchange step is performed only when the surface temperature of the evaporator and the relative humidity of the air in the fresh-keeping space satisfy the predetermined conditions at the same time, so as to achieve more precise control. For example, the predetermined humidity range may be set to 95% to 100%. When the relative humidity is less than 95%, the humidity is favorable for fresh-keeping storage of food, and an operation of reducing the humidity is not necessary.

The relative humidity of the air in the fresh space may be measured using a humidity sensor 920.

In some embodiments, the control method further sets a stop condition for the air exchange step, i.e. after step S406, the following steps are further performed:

step S408: it is determined whether the surface temperature of the evaporator 500 is higher than the predetermined temperature range and the relative humidity of the fresh-keeping space 201 is lower than the predetermined humidity range. If yes, go to step S410. If not, the fan 400 is kept open, and the air inlet 210 and the air outlet 220 are kept open.

Step S410: the blower 400 is turned off and the air inlet 210 and the air outlet 220 are closed to end the air exchange process in the fresh food space 201.

As shown in fig. 5, in this embodiment, only the stop condition of the air exchange step is changed as compared with the embodiment shown in fig. 4. The control method of this embodiment sequentially executes the following steps:

step S502: acquiring the surface temperature of the evaporator 500 and the relative humidity of the air in the fresh keeping space 201 during the period that the evaporator 500 is in the stop operation state;

step S504: judging whether the surface temperature of the evaporator 500 falls within a preset temperature range or not and whether the relative humidity of the air in the fresh-keeping space 201 falls within a preset humidity range or not; if both are true, go to step S506. If not, go to step S502 to continue monitoring the surface temperature and the relative humidity.

Step S506: the blower 400 is turned on and the intake vent 210 and the exhaust vent 220 are opened for a preset time. The preset time may be 1min, and then step S508 is executed.

Step S508: the blower 400 is turned off and the air inlet 210 and the air outlet 220 are closed to end the air exchange process in the fresh food space 201.

In this embodiment, although it is not determined whether the relative humidity of the air in the fresh food space 201 is lower than the predetermined humidity range, the time required for the air exchange process of the fresh food space 201 can be approximately determined through a plurality of tests. Therefore, as described in this embodiment, the opening durations of the blower 400, the inlet 210, and the outlet 220 may be directly set to simplify the control process.

The embodiment of the invention also provides the refrigerator. As shown in fig. 1 and 2, a refrigerator may generally include a cabinet 100, a cooling compartment 600, an evaporator 500, a fresh food box 200, an air duct 301, and a blower fan 400. The evaporator 500 is a part of a vapor compression refrigeration cycle system, which is provided in the cooling compartment 600 for making cold air when the compressor is operated. The air duct 301 communicates with the cooling chamber 600 to guide the output of cool air in the cooling chamber 600 to the inside of the refrigerator for cooling food, and to guide the output of cool air into the fresh food box 200 for cooling the fresh food box 200. The fan 400 is used to force the cool air in the cooling compartment 600 into the air duct 301. It can be understood that when the fan 400 is turned on, the forced convection of air is realized, and the cold air in the cooling chamber 600 continuously enters the air duct 301. When fan 400 is turned off, the airflow is substantially stagnant. The preservation box 200 is disposed inside the refrigerator, and a sealed preservation space 201 is formed therein for placing fresh vegetables, fruits, and the like. The preservation box 200 is provided with an air inlet 210 to communicate with an air duct 301 for introducing cold air for refrigeration. The fresh-keeping box 200 is further provided with an air outlet 220 to discharge relatively hot air, which has been subjected to heat exchange, into the cooling chamber 600, thereby realizing air circulation.

As shown in fig. 2, the refrigerator further includes a controller 800. The controller 800 includes a processor 810 and a memory 820. The memory 820 stores a computer program 821. And, the computer program 821 is executed to cause the controller 800 to execute the control method of the refrigerator in any of the above embodiments.

The memory 820 of the present embodiment may be an electronic memory such as a flash memory, an EEPROM, an EPROM, a hard disk or a ROM, the memory 820 having a storage space for a computer program 821 for performing any of the method steps of the above-described method. By running the computer program 821, the controller 800 performs the respective steps in the above-described method, thereby realizing the control of the refrigerator.

In some embodiments, as shown in FIG. 1, the air chute 301 is defined by an air chute member 300, the air chute member 300 standing inside the refrigerator with a bottom spaced 105 from the bottom wall of the refrigerator interior. The first cooling compartment 101 is provided in front of the air duct member 300, and the cooling compartment 600 is provided in the rear thereof. The blower 400 is installed on the rear wall of the wind tunnel 301 for blowing the cool air of the cooling compartment 600 into the wind tunnel 301. The front wall of the air duct 301 is provided with at least one compartment air supply outlet 310 communicating with the first refrigeration compartment 101. First refrigerated compartment 101 communicates with cooling compartment 600 for return air via space 105 below air ducting member 300. The crisper 200 is disposed at the bottom of the first cooling compartment 101, and the upper portion of the crisper 200 is attached to the front wall of the air duct 301, the air inlet 210 is disposed at the upper portion of the rear wall of the crisper 200 to communicate with the air duct 301, and the air outlet 220 is disposed at the lower portion of the rear wall of the crisper 200 to communicate with the cooling compartment 600 through the gap 105 below the air duct 300. The direction of the wind is indicated by arrows in fig. 1.

As shown in fig. 1, in some embodiments, the first refrigerated compartment 101 is a refrigerated compartment. The refrigerator also has a warming compartment 102 and a freezing compartment 103. The aforementioned cooling compartment 600, evaporator 500 and duct 301 are used only to cooperate with a refrigerating compartment. Another cooling chamber 720 is provided at the rear side of the variable temperature chamber 102 and the freezing chamber 103, and another evaporator 740 is provided therein. An air duct 730 is provided in front of the cooling chamber 720. The rear wall of the air duct 730 is provided with a fan 710 for blowing the cool air in the cooling chamber 720 into the air duct 730. The front wall of the duct 730 is opened with an air supply port 731 communicating with the variable temperature chamber 102 and an air supply port 732 communicating with the freezing chamber 103. For blowing air to the variable temperature chamber 102 and the freezing chamber 103, respectively.

In some embodiments, as shown in fig. 1, the refrigerator is further provided with an air pump 240 and an air-conditioned membrane module 230 for increasing the nitrogen concentration in the fresh-keeping space 201, wherein the air pump 240 is configured to pump the air in the fresh-keeping space 201 outwards, so that the air in the fresh-keeping space 201 flows to the air-conditioned membrane module 230, and part or all of the oxygen-enriched air in the fresh-keeping space 201 is discharged out of the fresh-keeping space 201 through the air pump 240 under the action of the air-conditioned membrane module 230. Fig. 1 is a schematic diagram showing the air pump and the air conditioning membrane module, and the air pump and the air conditioning membrane module are not limited to the position shown in fig. 1.

Specifically, the modified atmosphere module 230 has a modified atmosphere membrane and an oxygen-enriched gas collection cavity, and one side of the modified atmosphere membrane faces the oxygen-enriched gas collection cavity, so that when the pressure of the oxygen-enriched gas collection cavity is lower than the pressure of the other side of the modified atmosphere membrane, the oxygen-enriched gas in the air on the other side of the modified atmosphere membrane penetrates through the modified atmosphere membrane and enters the oxygen-enriched gas collection cavity.

The air pump 240 is configured to pump the air in the fresh keeping space 201 outward, so that the pressure of the oxygen-enriched air collecting cavity is lower than the pressure of the fresh keeping space 201, the air in the fresh keeping space 201 flows to the air-conditioning membrane assembly 230, and part or all of the oxygen-enriched air in the fresh keeping space 201 is discharged out of the fresh keeping space 201 through the air pump 240 under the action of the air-conditioning membrane assembly 230. The oxygen-enriched gas is mostly oxygen. It is understood that the air pump 240 should be turned on with the air inlet 210 and the air outlet 220 in a closed state.

In this embodiment, the modified atmosphere film can selectively permeate the oxygen-enriched gas in the fresh keeping space 201, and retain the rest of the nitrogen in the air inside the fresh keeping space 201, thereby increasing the nitrogen concentration inside the fresh keeping space 201. The refrigerator can form a nitrogen-rich and oxygen-poor gas atmosphere in the preservation space 201 to facilitate food preservation, and the gas atmosphere reduces the intensity of aerobic respiration of fruits and vegetables by reducing the content of oxygen in the fruit and vegetable preservation space, ensures the basic respiration and prevents the fruits and vegetables from anaerobic respiration, thereby achieving the purpose of long-term preservation of the fruits and vegetables. In addition, the gas atmosphere also has a large amount of gases such as nitrogen, the cooling efficiency of the articles in the fresh-keeping space 201 cannot be reduced, and the fruits and the vegetables can be effectively stored.

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

Claims

1. A control method of a refrigerator comprises a cooling chamber provided with an evaporator, a preservation box provided with a closed preservation space therein, an air duct communicated with the cooling chamber, and a fan for promoting cold air in the cooling chamber to enter the air duct, wherein the preservation box is provided with an air inlet communicated with the air duct and an air outlet communicated with the cooling chamber; the control method comprises the following steps:

if so, the fan is started, and the air inlet and the air outlet are opened so as to replace the air in the fresh-keeping space.

2. The control method according to claim 1,

on the premise that the surface temperature is judged to fall into the preset temperature range, acquiring the relative humidity of the air in the fresh-keeping space, and judging whether the relative humidity falls into the preset humidity range;

and if so, executing the steps of starting the fan and opening the air inlet and the air outlet.

3. The control method according to claim 2, further comprising, after the steps of turning on the blower and opening the intake opening and the outtake opening:

and when the surface temperature is higher than the preset temperature range and the relative humidity is lower than the preset humidity range, shutting down the fan and closing the air inlet and the air outlet.

4. The control method according to claim 2, further comprising, after the steps of turning on the blower and opening the intake opening and the outtake opening:

5. The control method according to claim 2, wherein

The preset temperature range is-5-0 ℃; and is

The preset humidity range is 95% -100%.

6. A refrigerator, comprising:

a cooling chamber in which an evaporator is disposed;

the preservation box is internally provided with a closed preservation space;

the air duct is communicated with the cooling chamber;

the fan is used for promoting cold air in the cooling chamber to enter the air channel, and the preservation box is provided with an air inlet communicated with the air channel and an air outlet communicated with the cooling chamber; and

a controller comprising a memory and a processor, the memory having stored therein a computer program, and the computer program, when executed by the processor, for implementing the control method according to any one of claims 1-5.

7. The refrigerator of claim 6, wherein

The air channel is defined by an air channel part, the air channel part is vertically arranged in the refrigerator, the bottom of the air channel part is separated from the bottom wall of the refrigerator, a first refrigerating chamber is arranged in front of the air channel part, and the cooling chamber is arranged behind the air channel part;

the front wall of the air duct is provided with at least one compartment air supply outlet communicated with the first refrigerating compartment, and the first refrigerating compartment is communicated with the cooling compartment through the lower part of the air duct component for return air; and is

The preservation box sets up bottom and upper portion in the first refrigeration room lean on in the wind channel antetheca, the air intake sets up wall upper portion behind the preservation box is in order to communicate the wind channel, the air outlet sets up wall lower part behind the preservation box is in order to warp wind channel part below intercommunication the cooling chamber.

8. The refrigerator of claim 7, wherein

The first refrigerating compartment is a refrigerating compartment.

9. The refrigerator of claim 6, further comprising:

an air pump and an air adjusting membrane component for improving the nitrogen concentration in the fresh-keeping space,

the air pump is configured to pump the air in the fresh-keeping space outwards, so that the air in the fresh-keeping space flows to the air-conditioning membrane assembly, and part or all of the oxygen-enriched air in the fresh-keeping space is discharged out of the fresh-keeping space through the air pump under the action of the air-conditioning membrane assembly.

10. The refrigerator of claim 6, wherein

The air pump is configured to be opened when the air inlet and the air outlet are in a closed state.