CN114877585A - Refrigerator and air curtain fan control method of refrigerator - Google Patents

Abstract

The invention discloses a refrigerator and a control method of an air curtain fan of the refrigerator, wherein the refrigerator comprises the following components: a box body, wherein a compartment is arranged in the box body; wherein a door body is arranged at the opening of the chamber; the air curtain fan is used for forming an air curtain at a position close to the door body inside the compartment; a controller to: when the door body is detected to be opened, acquiring the operation condition of the refrigerator; acquiring state parameters corresponding to the operating conditions, and controlling the rotating speed of the air curtain fan according to the state parameters; the state parameters comprise at least one of temperature difference between the interior of the chamber and the external environment and opening time of a door body of the chamber. By adopting the embodiment, the operation noise and the energy consumption of the air curtain fan can be effectively reduced.

Description

Refrigerator and refrigerator air curtain fan control method

technical field

The invention relates to the technical field of household appliances, in particular to a refrigerator and a control method for an air curtain fan of the refrigerator.

Background technique

With the rapid development of user demand and market, some refrigerators are currently equipped with an air curtain function. When the door of the refrigerator compartment is opened, the air curtain fan designed and installed on the top or back of the refrigerator immediately works at high speed, which can quickly and evenly release negative ion cold air. At the same time, a three-dimensional air curtain is formed near the door body of the compartment, which prevents the exchange of cold and heat inside and outside the compartment, reduces the loss of cold energy when the user uses the refrigerator to open the door, and reduces the temperature and humidity fluctuations in the compartment. However, the inventors found in the process of implementing the present invention that the air curtain fan in the existing refrigerator keeps running at a constant high speed during the user's door opening process, which will generate relatively large vibration noise and consume relatively large power.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a refrigerator and a method for controlling an air curtain fan of the refrigerator, which can effectively reduce the operating noise and energy consumption of the air curtain fan.

An embodiment of the present invention provides a refrigerator, comprising:

A box body, which is provided with a compartment; wherein, a door body is arranged at the opening of the compartment;

an air curtain fan, which is used to form an air curtain at a position close to the door body inside the compartment;

controller, which is used to:

When it is detected that the door is opened, the operating condition of the refrigerator is obtained;

Acquire state parameters corresponding to the operating conditions, and control the rotational speed of the air curtain fan according to the state parameters; wherein, the state parameters include the temperature difference between the interior of the compartment and the external environment and the At least one of the door opening times of the chamber.

Compared with the prior art, the refrigerator disclosed in the embodiment of the present invention acquires the operating conditions of the refrigerator when the door of the compartment is detected to be opened, and then acquires the state parameters corresponding to the operating conditions, and the state parameters include the interior of the compartment. At least one of the temperature difference with the external environment and the door opening time of the compartment, and then control the rotation speed of the air curtain fan according to the state parameter, so that the rotation speed of the air curtain fan meets different outdoor ambient temperatures and/or different door opening times Therefore, it can effectively reduce the operating noise and energy consumption of the air curtain fan.

As an improvement of the above solution, the operating condition includes a first operating condition in which the operating mode is a daytime operating mode and is in a non-stop state and a non-defrosting state;

Then, acquiring the state parameter corresponding to the operating condition, and controlling the rotational speed of the air curtain fan according to the state parameter, includes:

When the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters;

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is not higher than the first time threshold, or the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is not higher than the second time threshold, or, when the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than the third time threshold, control the air curtain Fan does not run;

The first temperature threshold is higher than the second temperature threshold, the first time threshold is smaller than the second time threshold, and the second time threshold is smaller than the third time threshold.

In this embodiment, since the temperature difference is not lower than the first temperature threshold and the door opening time is not higher than the first time threshold, that is, the heat exchange speed between indoor and outdoor is high but the door opening time is short, Or, the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold, and the door opening time is not higher than the second time threshold, that is, the speed of heat exchange between indoor and outdoor is moderate but the door is opened The time is short, or, the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than the third time threshold, that is, when the speed of heat and cold exchange between indoor and outdoor is low but the door opening time is medium, The degree of cooling loss in the compartment is extremely low. At this time, controlling the air curtain fan to not operate can greatly reduce the operating noise and energy consumption of the air curtain fan, and at the same time, it will not affect the temperature of the compartment.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is not lower than a fourth time threshold, the air curtain fan is controlled to run at the first rotational speed; wherein the fourth The time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. Therefore, when the temperature difference is not lower than the first temperature threshold and the door opening time is not lower than the fourth time threshold, that is, the speed of heat and cold exchange between indoor and outdoor When the air curtain fan is controlled to run at the highest first rotation speed when it is relatively high and the opening time is very long, resulting in the loss of cooling capacity to a very high degree, the current demand for extremely high isolation cooling capacity can be quickly met, thereby reducing the number of compartments. At the same time, the noise generated by the air curtain fan has less impact on the user.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is higher than the first time threshold and the door opening time is lower than a fourth time threshold, or the temperature difference is lower than When the first temperature threshold and the temperature difference are higher than the second temperature threshold and the door opening time is not less than the fourth time threshold, the air curtain fan is controlled to run at the second rotational speed; Wherein, the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. There is a certain degree of shading effect on the operating noise of the device, so when the temperature difference is not lower than the first temperature threshold and the door opening time is higher than the first time threshold and the door opening time is lower than the first temperature threshold Four time thresholds, that is, when the heat exchange rate between indoor and outdoor is high and the door opening time is moderate, resulting in a high degree of cooling loss, or, the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the first temperature difference. When the second temperature threshold and the door opening time is not lower than the fourth time threshold, that is, when the indoor and outdoor heat and cold exchange speed is moderate but the door opening time is very long, resulting in a high degree of cooling loss, control the air curtain The fan runs at the higher second rotational speed, which can quickly meet the current high isolation cooling demand, thereby reducing the temperature fluctuation of the compartment, and at the same time, the noise generated by the air curtain fan has less impact on the user.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is higher than the second time threshold and the door opening time is lower than the second temperature threshold Four time thresholds, or, when the temperature difference is not higher than the second temperature threshold and the door opening time is not lower than the fourth time threshold, controlling the air curtain fan to run at the third rotational speed; Wherein, the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. There is a certain degree of shadowing effect on the operating noise of the The threshold value and the door opening time is lower than the fourth time threshold, that is, when the indoor and outdoor cooling and heat exchange speed is moderate and the door opening time is moderate, resulting in moderate loss of cooling capacity, or the temperature difference is not higher than the second time threshold. The temperature threshold and the door opening time is not lower than the fourth time threshold, that is, when the indoor and outdoor cold and heat exchange speed is low but the door opening time is very long, resulting in a moderate loss of cooling capacity, control the air curtain fan Running at the third rotational speed can quickly meet the current demand for moderate isolation cooling capacity, thereby reducing room temperature fluctuations, and at the same time, the noise generated by the air curtain fan has less impact on users.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is not higher than the second temperature threshold and the door opening time is higher than the third time threshold and the door opening time is lower than the fourth time threshold, controlling the air curtain fan operating at the fourth rotational speed; wherein the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. There is a certain degree of shading effect on the operating noise of the device, so when the temperature difference is not higher than the second temperature threshold and the door opening time is higher than the third time threshold and the door opening time is lower than the third time threshold Four time thresholds, that is, when the indoor and outdoor cold and heat exchange speed is low and the door opening time is moderate, resulting in a low degree of cooling loss, the air curtain fan is controlled to run at the fourth speed, which can quickly meet the current low isolation. Cooling demand, thereby reducing room temperature fluctuations, and at the same time, the noise generated by the air curtain fan has less impact on users.

As an improvement of the above solution, the operating conditions include a second operating condition in which the operating mode is a nighttime operating mode and a third operating condition in which the operating mode is a silent operating mode;

The rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein, the first rotational speed is higher than the second rotational speed, and the second rotational speed higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

Then, acquiring the state parameter corresponding to the operating condition, and controlling the rotational speed of the air curtain fan according to the state parameter, includes:

When the operating condition is the second operating condition or the third operating condition, obtain the temperature difference between the interior of the compartment and the external environment as a state parameter;

When it is determined that the temperature difference is not lower than the first temperature threshold, controlling the air curtain fan to run at the third rotational speed;

When it is determined that the temperature difference is lower than the first temperature threshold and higher than the second temperature threshold, controlling the air curtain fan to operate at the fourth rotational speed;

When it is determined that the temperature difference is not higher than the second temperature threshold, the air curtain fan is controlled to operate at the fifth rotational speed; wherein the first temperature threshold is higher than the second temperature threshold.

In this embodiment, when the refrigerator operates in the second working condition or the third working condition, the user uses the refrigerator less frequently, and the ambient background noise is low, so the noise of the air curtain fan is more likely to cause The user is disgusted, and even affects the normal sleep and rest. Therefore, when the temperature difference is not lower than the first temperature threshold, that is, when the indoor and outdoor cold and heat exchange speed is relatively fast, the air curtain fan is controlled to be at a moderate third rotational speed. Operation, and, when the temperature difference is lower than the first temperature threshold and higher than the second temperature threshold, that is, when the speed of heat and cold exchange between indoor and outdoor is moderate, control the air curtain fan to lower the fourth temperature. speed operation, and, when the temperature difference is not higher than the second temperature threshold, that is, when the indoor and outdoor cold and heat exchange rates are low, the air curtain fan is controlled to operate at the lowest fifth speed, which can meet the The isolation cooling demand corresponding to the different cooling and heat exchange rates inside and outside the room, thereby reducing the temperature fluctuation of the room, and preventing the operating noise of the air curtain fan from being too high and having a greater impact on the user.

As an improvement of the above solution, the operating condition includes a fourth operating condition in which the operating mode is a daytime operating mode and is in a shutdown state or a defrosting state;

The rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein, the first rotational speed is higher than the second rotational speed, and the second rotational speed higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

Then, acquiring the state parameter corresponding to the operating condition, and controlling the rotational speed of the air curtain fan according to the state parameter, includes:

When the operating condition is the fourth operating condition, obtain the door opening time of the compartment as a state parameter;

When it is determined that the door opening time is not higher than the fifth time threshold, controlling the air curtain fan to not operate;

When it is determined that the door opening time is higher than the fifth time threshold and the door opening time is lower than the sixth time threshold, controlling the air curtain fan to run at the fifth rotational speed;

When it is determined that the door opening time is not lower than the sixth time threshold, the air curtain fan is controlled to run at the fourth rotation speed; wherein the fifth time threshold is smaller than the sixth time threshold.

In this embodiment, when the refrigerator operates in the fourth operating condition, the exchange rate of cold and heat inside and outside the compartment is relatively low, so the door is opened for a time not higher than the fifth time threshold, that is, the door is opened. When the time is very short and the cooling capacity is lost to a very low degree, controlling the air curtain fan to not operate can greatly reduce the operating noise and energy consumption of the air curtain fan, and will not affect the temperature of the compartment; When the door opening time is higher than the fifth time threshold and the door opening time is lower than the sixth time threshold, that is, when the door opening time is moderate, control the air curtain fan at the lowest fifth speed run, and, when the door opening time is not lower than the sixth time threshold, that is, when the door opening time is longer, the air curtain fan is controlled at the fourth rotational speed higher than the fifth rotational speed It can meet the isolation cooling demand corresponding to different door opening times, thereby reducing the temperature fluctuation of the room, and preventing the operating noise of the air curtain fan from being too high and having a great impact on the user.

Another embodiment of the present invention provides a method for controlling an air curtain fan of a refrigerator, including:

When it is detected that the compartment door of the refrigerator is opened, the operating conditions of the refrigerator are obtained;

Acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan of the refrigerator according to the state parameters; wherein the air curtain fan is used for a position close to the door body inside the compartment An air curtain is formed at the place, and the state parameter includes at least one of a temperature difference between the interior of the compartment and the external environment and an opening time of a door of the compartment.

Compared with the prior art, the method for controlling the air curtain fan of the refrigerator disclosed in the embodiment of the present invention obtains the operating conditions of the refrigerator when the opening of the compartment door is detected, and then acquires the state parameters corresponding to the operating conditions. The state parameter includes at least one of the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment, and then the speed of the air curtain fan is controlled according to the state parameter, so that the speed of the air curtain fan meets different outdoor ambient temperatures. And/or the isolation cooling demand under different door opening times, to prevent the air curtain fan from maintaining a constant high-speed operation, which can effectively reduce the operating noise and energy consumption of the air curtain fan.

Description of drawings

1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

2 is a schematic cross-sectional structure diagram of a refrigerator according to an embodiment of the present invention;

Fig. 3 is a partial enlarged view of the location of the air curtain fan in Fig. 2;

4 is a schematic cross-sectional structure diagram of another refrigerator according to an embodiment of the present invention;

FIG. 5 is a physical diagram of an air curtain fan provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a connection relationship of various components in a refrigerator according to an embodiment of the present invention;

7 is a schematic structural diagram of a refrigeration system for a refrigerator according to an embodiment of the present invention;

8 is a schematic structural diagram of a refrigerator according to another embodiment of the present invention;

9 is a schematic diagram of a specific work flow of a controller of a refrigerator according to an embodiment of the present invention;

10 is a schematic diagram of a specific work flow of a controller of another refrigerator according to an embodiment of the present invention;

11 is a schematic diagram of a specific work flow of a controller of another refrigerator provided by an embodiment of the present invention;

12 is a schematic flowchart of a method for controlling an air curtain fan of a refrigerator according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to FIG. 1 , it is a schematic structural diagram of a refrigerator according to an embodiment of the present invention.

It should be noted that, in the existing refrigerator, only the cooling capacity isolation effect of the air curtain function is considered, the air curtain fan rotates at a high speed, and keeps running at a constant high speed during the entire user door opening process, without paying attention to the working process of the fan. vibration and noise problems. When the user opens the door to pick up and place food, the air curtain fan is closest to the user's head. The mechanical noise of its high-speed operation and the aerodynamic noise blown by the high-speed airflow will be directly transmitted to the user's ears, which will seriously affect the user's noise experience. It determines the sound quality performance of the product. At present, the control method of the air curtain fan is designed as follows: when the user opens the door of the refrigerator compartment, the air curtain fan starts immediately after receiving the door opening command, and operates at a constant high speed (for example, 1500rpm); when the user closes the refrigerator compartment When the door is closed, the air curtain fan stops working immediately after receiving the door closing command. The main problems existing in the existing air curtain fan control mode are: (1) When the user opens the door of the refrigerator, the air curtain fan starts to run at high speed, which produces a large amount of mechanical and aerodynamic noise. When the rotation speed of the air curtain fan reaches 1500rpm, its The noise of the fan operating alone is above 41dB(A). When the noise level of the refrigerator is only 35dB(A), it is easy to cause a poor subjective experience of users, causing a large number of complaints from users about noise problems and affecting user experience; when When the refrigerator enters the silent operation mode or the night operation mode, the noise of the high-speed air curtain fan is more prominent due to the low background noise of the family room environment. (2) When the refrigerator is opened, the air curtain fan immediately starts to run at high speed. After the door is closed, the air curtain fan stops working immediately. At this time, the high-speed start and stop of the air curtain fan will not effectively isolate the cooling capacity, but will cause obvious vibration and noise problems, and the frequent start and stop of the air curtain fan will also increase Power consumption and performance. (3) The air curtain fan simply runs at a constant high speed during the working process, and does not comprehensively consider the specific actual working conditions such as ambient temperature and door opening time, and cannot guarantee the balance between the cooling effect of the air curtain fan and the noise level of the fan.

In order to solve the above problems, an embodiment of the present invention provides a refrigerator, including:

The box body 10 is provided with a compartment 11; wherein, the opening of the compartment 11 is provided with a door;

an air curtain fan 20, which is used to form an air curtain at a position close to the door body inside the compartment 11;

A controller 30 for:

When it is detected that the door is opened, the operating condition of the refrigerator is obtained;

Obtain state parameters corresponding to the operating conditions, and control the rotational speed of the air curtain fan 20 according to the state parameters; wherein, the state parameters include the temperature difference between the interior of the compartment 11 and the external environment and all at least one of the opening time of the door of the compartment 11.

Exemplarily, the air curtain fan 20 is installed at the top position of the compartment 11, as shown in FIG. An air curtain is formed near the door body, as shown in FIG. 3 , which is a partial enlarged view of the position of the air curtain fan 20 in FIG. 2 . In addition, the air curtain fan 20 can also be installed at the bottom of the compartment 11. As shown in FIG. 4, the air curtain fan 20 blows the cold air in the compartment 11 upward from the bottom to the top of the compartment 11, and then blows the cold air from the top to the top of the compartment 11. The air is discharged downward to form an air curtain at a position close to the door body inside the compartment 11 . Wherein, the physical diagram of the air curtain fan 20 may be as shown in FIG. 5 .

Referring to FIG. 6 , in the refrigerator of this embodiment, the controller 30 is connected to the air curtain fan 20 , and the controller 30 sends a speed adjustment signal to the air curtain fan 20 , so that the air curtain fan 20 adjusts the speed according to the speed adjustment signal. In addition, the refrigerator further includes a main control board 40 , a door switch detection device 50 for detecting the state of the door switch, an ambient temperature detection device 60 for detecting the external temperature of the compartment 11 , and a compartment for detecting the internal temperature of the compartment 11 . The room temperature detection device 70, wherein the main control board 40 is used to control the opening and closing of the refrigerator and other function settings of the refrigerator, such as setting the temperature, changing the operation mode (daytime operation mode, nighttime operation mode, silent operation mode, etc.) and To control the operating state (defrosting, cooling, etc.), etc., the main control board 40, the door switch detection device 50, the ambient temperature detection device 60 and the compartment temperature detection device 70 are all connected to the controller 30, so that the controller 30 passes the main control The board 40 can obtain the operating conditions of the refrigerator, the door opening time of the compartment 11 can be obtained through the door switch detection device 50, and the interior of the compartment 11 can be obtained through the ambient temperature detection device 60 and the compartment temperature detection device 70 temperature difference from the external environment.

Referring to FIG. 7 , FIG. 7 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention. The refrigeration system includes a compressor 1 , a condenser 2 , an anti-condensation pipe 3 , a drying filter 4 , a capillary tube 5 , and an evaporator 6 and gas-liquid separator 7. The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. The compression process is as follows: the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor 1, compressed into a high-temperature, high-pressure superheated gas in the cylinder of the compressor 1, and then discharged into the condenser 2; the condensation process is as follows: : The high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 2, and the temperature continues to drop. It is gradually cooled to normal temperature and high-pressure saturated vapor, and further cooled to saturated liquid, and the temperature does not drop any more. The temperature at this time is called the condensation temperature. The pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is: the saturated refrigerant liquid after condensation is filtered by the drying filter 4 to remove moisture and impurities and then flows into the capillary tube 5, through which the throttling and decompression are carried out, and the refrigerant It becomes normal temperature and low pressure wet vapor; the evaporation process is: normal temperature and low pressure wet vapor begins to absorb heat in the evaporator 6 for vaporization, which not only reduces the temperature of the evaporator and its surroundings, but also makes the refrigerant become low temperature and low pressure. The refrigerant from the evaporator 6 passes through the gas-liquid separator 7 and returns to the compressor 1 again. The above process is repeated to transfer the heat in the refrigerator to the air outside the box to achieve the purpose of refrigeration.

As shown in FIG. 8 , the refrigerator of the present embodiment has an approximate cuboid shape. The refrigerator includes a box body 10 defining a storage space. The box body 10 is provided with at least one compartment 11 , and one or more compartments 11 are arranged at the opening of each compartment 11 . For each door body 200, for example, in FIG. 8, the upper storage compartment is provided with a double door body. The door body 200 includes a door body shell 210 located outside the box body 10, a door inner liner 220 located inside the box body 10, an upper end cover 230, a lower end cover 240, and a door body shell 210, a door inner liner 220, an upper end The heat insulating layer between the cover 230 and the lower end cover 240; usually, the heat insulating layer is filled with foamed material. Among them, the compartment 11 can be configured as a refrigerating room, a freezing room, and a changing room according to different uses.

Compared with the prior art, the refrigerator disclosed in the embodiment of the present invention obtains the operating conditions of the refrigerator when it is detected that the door of the compartment 11 is opened, and then acquires the state parameters corresponding to the operating conditions, and the state parameters include the compartments. 11. At least one of the temperature difference between the interior and the external environment and the opening time of the door of the compartment 11, and then control the rotational speed of the air curtain fan 20 according to the state parameter, so that the rotational speed of the air curtain fan 20 meets different outdoor ambient temperatures and / or the isolation cooling demand under different door opening times, so as to prevent the air curtain fan 20 from running at a constant high speed all the time, thereby effectively reducing the operating noise and energy consumption of the air curtain fan 20 .

As an optional embodiment, the operating condition includes a first operating condition in which the operating mode is a daytime operating mode and is in a non-stop state and a non-defrosting state;

Then the acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan 20 according to the state parameters, includes:

When the operating condition is the first operating condition, the temperature difference between the interior of the compartment 11 and the external environment and the door opening time of the compartment 11 are obtained as state parameters;

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is not higher than the first time threshold, or the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is not higher than the second time threshold, or, when the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than the third time threshold, control the air curtain Fan 20 does not operate;

The first temperature threshold is higher than the second temperature threshold, the first time threshold is smaller than the second time threshold, and the second time threshold is smaller than the third time threshold.

In this embodiment, since the temperature difference is not lower than the first temperature threshold and the door opening time is not higher than the first time threshold, that is to say, the exchange rate of cold and heat inside and outside the compartment 11 is relatively high, but the door opening time is very short. or, the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is not higher than the second time threshold, that is, the internal and external heat and cold exchanges in the compartment 11 The speed is medium but the door opening time is short, or, the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than the third time threshold, that is, the speed of heat and cold exchange inside and outside the compartment 11 is low However, when the door opening time is medium, the loss of cooling capacity of the compartment 11 is extremely low. At this time, controlling the air curtain fan 20 to not operate can greatly reduce the operating noise and energy consumption of the air curtain fan 20, and at the same time, it will not cause any damage to the compartment. 11 Temperature affects.

As an optional embodiment, the rotational speed of the air curtain fan 20 is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After obtaining the temperature difference between the interior of the compartment 11 and the external environment and the opening time of the door of the compartment 11 when the operating condition is the first working condition as state parameters, Also includes:

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is not lower than a fourth time threshold, the air curtain fan 20 is controlled to run at the first rotational speed; wherein the first The fourth time threshold is greater than the third time threshold.

In this embodiment, since the ambient background noise is high when the operating condition of the refrigerator is the first operating condition, and the refrigeration system is in a normal operating state, the operating noise of the compressor and other noise components affects the operating noise of the air curtain fan 20 . There is a certain degree of shading effect, so compared with the second working condition and the third working condition, the speed of the air curtain fan 20 can be appropriately increased; at the same time, it is further considered that under the first working condition, the refrigerator is used more frequently and the number of times the user opens the door. Therefore, the design of the control method of the air curtain fan 20 not only judges the temperature difference between the inside and outside of the compartment 11, but also reasonably matches and controls the rotation speed of the air curtain fan 20 according to the user's actual door opening time. Therefore, in this embodiment, when the temperature difference is not lower than the first temperature threshold and the door opening time is not lower than the fourth time threshold, that is, the speed of heat and cold exchange inside and outside the compartment 11 is high and the door is opened When the time is very long and the cooling capacity is lost to an extremely high degree, the air curtain fan 20 is controlled to run at the highest first rotational speed, which can quickly meet the current extremely high isolation cooling capacity demand, thereby reducing the temperature fluctuation of the compartment 11 At the same time, the noise generated by the air curtain fan 20 has less influence on the user.

As an optional embodiment, the rotational speed of the air curtain fan 20 is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After obtaining the temperature difference between the interior of the compartment 11 and the external environment and the opening time of the door of the compartment 11 when the operating condition is the first working condition as state parameters, Also includes:

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is higher than the first time threshold and the door opening time is lower than a fourth time threshold, or the temperature difference is lower than When the first temperature threshold and the temperature difference are higher than the second temperature threshold and the door opening time is not less than the fourth time threshold, the air curtain fan 20 is controlled to run at the second rotational speed ; wherein, the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. The operating noise of 20 has a certain degree of shielding effect. Therefore, when the temperature difference is not lower than the first temperature threshold and the door opening time is higher than the first time threshold and the door opening time is lower than the first temperature threshold The fourth time threshold, that is, when the speed of heat and cold exchange inside and outside the compartment 11 is high and the door opening time is moderate, resulting in a high degree of cooling loss, or, the temperature difference is lower than the first temperature threshold and the temperature difference is higher than When the second temperature threshold and the door opening time are not lower than the fourth time threshold, that is, when the speed of heat and cold exchange between the inside and outside of the compartment 11 is moderate but the opening time is very long, resulting in a high degree of cooling loss, Controlling the air curtain fan 20 to run at the higher second rotational speed can quickly meet the current high isolation cooling demand, thereby reducing the temperature fluctuation of the compartment 11, and at the same time, the noise generated by the air curtain fan 20 is harmful to users. less impact.

As an optional embodiment, the rotational speed of the air curtain fan 20 is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After obtaining the temperature difference between the interior of the compartment 11 and the external environment and the opening time of the door of the compartment 11 when the operating condition is the first working condition as state parameters, Also includes:

When it is determined that the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is higher than the second time threshold and the door opening time is lower than the second temperature threshold Four time thresholds, or when the temperature difference is not higher than the second temperature threshold and the door opening time is not lower than the fourth time threshold, the air curtain fan 20 is controlled to run at the third rotational speed ; wherein, the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. The operating noise of 20 has a certain degree of shading effect, so by the time the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is higher than the second temperature threshold The time threshold and the door opening time is lower than the fourth time threshold, that is, when the cooling and heat exchange speed inside and outside the compartment 11 is moderate and the door opening time is moderate, resulting in moderate loss of cooling capacity, or the temperature difference is not higher than the When the second temperature threshold is set and the door opening time is not lower than the fourth time threshold, that is, when the exchange rate of cold and heat inside and outside the compartment 11 is low but the opening time is very long, resulting in a moderate loss of cooling capacity, control the The air curtain fan 20 runs at the third rotational speed, which can quickly meet the current medium isolation cooling demand, thereby reducing the temperature fluctuation of the compartment 11. At the same time, the noise generated by the air curtain fan 20 has an impact on the user. smaller.

As an optional embodiment, the rotational speed of the air curtain fan 20 is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After obtaining the temperature difference between the interior of the compartment 11 and the external environment and the opening time of the door of the compartment 11 when the operating condition is the first working condition as state parameters, Also includes:

When it is determined that the temperature difference is not higher than the second temperature threshold and the door opening time is higher than the third time threshold and the door opening time is lower than the fourth time threshold, controlling the air curtain fan 20 operating at the fourth rotational speed; wherein the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. The operating noise of 20 has a certain degree of shielding effect, so by the time the temperature difference is not higher than the second temperature threshold and the door opening time is higher than the third time threshold and the door opening time is lower than The fourth time threshold, that is, when the cooling and heat exchange speed inside and outside the compartment 11 is low and the door opening time is moderate, resulting in a low degree of cooling loss, the air curtain fan 20 is controlled to run at the fourth rotational speed, which can meet the requirements quickly. The current low isolation cooling demand reduces the temperature fluctuation of the compartment 11, and at the same time, the noise generated by the air curtain fan 20 has less impact on the user.

It should be noted that, in specific implementation, the first temperature threshold, the second temperature threshold, the first time threshold, the second time threshold, the third time threshold, and the fourth time The threshold, the first rotational speed, the second rotational speed, the third rotational speed, the fourth rotational speed, and the fifth rotational speed may be set according to the actual environment and cooling demand, which are not limited herein. Optionally, the first temperature threshold is 20°C, the second temperature threshold is 10°C, the first time threshold is 8s, the second time threshold is 12s, and the third time threshold is 16s The fourth time threshold is 1min, the first rotational speed R1 is 1400 rpm, the second rotational speed R2 is 1300 rpm, the third rotational speed R3 is 1200 rpm, the fourth rotational speed R4 is 1100 rpm, and the fifth rotational speed R5 is 1000 rpm.

Exemplarily, in combination with the above embodiments, set the first temperature threshold to be 20°C, the second temperature threshold to be 10°C, the first time threshold to be 8s, the second time threshold to be 12s, and the The third time threshold is 16s, and the fourth time threshold is 1min. When the temperature difference T0 ≥ 20°C between the interior of the compartment 11 and the external environment, if the door opening time t ≤ 8s, since the door opening time is extremely short, the compartment 11 basically has no loss of cooling capacity and temperature exchange between the inside and outside, so control The air curtain fan 20 does not work; with the increase of the door opening time, when 8s<t<1min, control the air curtain fan 20 to work at the speed R2. It is easy to cause the loss of cooling capacity, so the fan speed is appropriately increased, and the air curtain fan 20 is controlled to work at the speed R1. When the temperature difference T0 between the inside and outside of the compartment 11 is between 10°C and 20°C, the loss of cooling capacity and the temperature exchange between the inside and outside of the compartment 11 will be weakened compared to the high temperature difference, so the air curtain fan 20 is controlled to appropriately reduce the corresponding If the door opening time is t≤12s, there is basically no cooling loss in the compartment 11 and no temperature exchange between the inside and outside, so the control air curtain fan 20 does not work; As the door opening time increases, when 12s < t < 1min, control the air curtain fan 20 to work at the speed R3. When the door opening time is further increased, when t ≥ 1min, due to the longer door opening time, it is easy to cause the loss of cooling capacity, and the control air The curtain fan 20 operates at the rotational speed R2. When the temperature difference T0 is further reduced and T0≤10°C, if the door opening time t≤16s, since the door opening time is extremely short, the compartment 11 basically has no cooling loss and internal and external temperature exchange, so the control air curtain fan 20 does not work; With the increase of door opening time, when 16s<t<1min, control the air curtain fan 20 to work at the speed of R4. When the door opening time is further increased, when t≥1min, due to the long door opening time, it is easy to cause the loss of cooling capacity. The air curtain fan 20 operates at the rotational speed R3. Exemplarily, as shown in FIG. 9 , the specific working process of the controller 30 is as follows: S11 , detect whether the door body is open, if so, go to step S12 ; S12 , obtain the operating condition of the refrigerator; S13 , determine the Whether the operating condition is the first operating condition, if so, go to step S14; S14, obtain the temperature difference T0 between the interior of the compartment 11 and the external environment and the door opening time t of the compartment 11 to obtain As a state parameter; S15, determine the magnitude relationship between T0 and 20°C and 10°C, if T0≥20°C, go to step S111, if 20°C>T0>10°C, go to step S121, if T0≤10°C , then go to step S131; S111, determine the magnitude relationship between t and 8s and 1min, if t≤8s, go to step S112, if 8s<t<1min, go to step S113, if t≥1min, go to step S113 S114; S112, control the air curtain fan 20 to not work; S113, control the air curtain fan 20 to run at the rotational speed R2; S114, control the air curtain fan 20 to run at the rotational speed R1; S121, determine the magnitude relationship between t and 12s and 1min, If t≤12s, go to step S122, if 12s<t<1min, go to step S123, if t≥1min, go to step S124; S122, control the air curtain fan 20 to not work; S123, control the air curtain fan 20 to Speed R3 runs; S124, control the air curtain fan 20 to run at the speed R2; S131, determine the magnitude relationship between t and 16s and 1min, if t≤16s, go to step S132, if 16s<t<1min, go to step S132 S133, if t≥1min, go to step S134; S132, control the air curtain fan 20 to not work; S133, control the air curtain fan 20 to run at the rotational speed R4; S134, control the air curtain fan 20 to run at the rotational speed R3.

As an optional embodiment, the operating conditions include a second operating condition in which the operating mode is a nighttime operating mode and a third operating condition in which the operating mode is a silent operating mode;

The rotation speed of the air curtain fan 20 is pre-divided into a first rotation speed, a second rotation speed, a third rotation speed, a fourth rotation speed and a fifth rotation speed; wherein, the first rotation speed is higher than the second rotation speed, and the second rotation speed is higher than the second rotation speed. The rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

Then the acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan 20 according to the state parameters, includes:

When the operating condition is the second operating condition or the third operating condition, obtain the temperature difference between the interior of the compartment 11 and the external environment as a state parameter;

When it is determined that the temperature difference is not lower than the first temperature threshold, controlling the air curtain fan 20 to operate at the third rotational speed;

When it is determined that the temperature difference is lower than the first temperature threshold and higher than the second temperature threshold, controlling the air curtain fan 20 to operate at the fourth rotational speed;

When it is determined that the temperature difference is not higher than the second temperature threshold, the air curtain fan 20 is controlled to operate at the fifth rotational speed; wherein the first temperature threshold is higher than the second temperature threshold.

It should be noted that, when the refrigerator is running in the second working condition or the third working condition, the number of times the user uses the refrigerator is less, and the factors affecting the cooling isolation effect of the air curtain function are mainly the inside and outside of the compartment 11. Temperature difference, and the ambient background noise is low, the noise of the air curtain fan 20 is more likely to arouse the user's disgust, and even affect the normal sleep and rest, so on the premise of ensuring the cooling effect of the air curtain function, it is required to appropriately reduce the working speed of the fan to reduce Excessive noise generation. Therefore, in this embodiment, when the temperature difference is not lower than the first temperature threshold, that is, when the heat exchange speed between the inside and outside of the compartment 11 is relatively fast, the air curtain fan 20 is controlled to moderate the third temperature. The rotation speed is running, and when the temperature difference is lower than the first temperature threshold and higher than the second temperature threshold, that is, when the cooling and heat exchange speed between the inside and outside of the compartment 11 is moderate, the air curtain fan 20 is controlled to operate at a lower temperature. The fourth rotation speed is operated, and when the temperature difference is not higher than the second temperature threshold, that is, when the heat exchange speed between the inside and outside of the compartment 11 is low, the air curtain fan 20 is controlled to operate at the lowest temperature. The fifth rotational speed operation can meet the isolation cooling requirements corresponding to different cooling and heat exchange rates inside and outside the compartment 11, thereby reducing the temperature fluctuation of the compartment 11, and preventing the noise of the operating noise of the air curtain fan 20 from being too high and causing the user. greater impact.

Exemplarily, assuming that the first temperature threshold is 20°C and the second temperature threshold is 10°C, when the temperature difference T0 between the interior of the compartment 11 and the external environment is ≥ 20°C, due to the difference between the interior of the compartment 11 and the external environment. The temperature difference of the external environment is large, the cooling capacity of the compartment 11 is lost and the exchange of cold and heat between the inside and outside is very fast, so the air curtain fan 20 is immediately controlled to work at high speed R3, which can ensure the effect of cooling capacity isolation; When the temperature is between 10°C and 20°C, since the temperature difference is relatively moderate, the cooling capacity of the compartment 11 is lost and the temperature exchange between the inside and outside is weakened, so the air curtain fan 20 can be controlled to work at a medium speed R4; when the temperature difference is further reduced. , when T0≤10°C, due to the small temperature difference, there may be almost no obvious temperature difference for the design temperature (2-5°C) of some refrigerated compartments 11. In this case, the air curtain fan 20 can be controlled at a low speed R5 The working operation can not only ensure the cooling isolation effect during the user's door opening process, but also effectively reduce the noise of the air curtain fan 20, and improve the user's subjective product sound experience at night or in the silent operating mode. With reference to FIG. 10 , the specific working process of the controller 30 is as follows: S21, detect whether the door body is open, if so, go to step S22; S22, obtain the operating condition of the refrigerator; S23, determine whether the operating condition is not is the second working condition or the third working condition, if yes, then go to step S24; S24, obtain the temperature difference T0 between the interior of the compartment 11 and the external environment, as a state parameter; S25, judge T0 and The magnitude relationship between 20°C and 10°C, if T0≥20°C, go to step S211; if 20°C>T0>10°C, go to step S221; if T0≤10°C, go to step S231; S211, control The air curtain fan 20 runs at the rotation speed R3; S221, controls the air curtain fan 20 to run at the rotation speed R4; S231, controls the air curtain fan 20 to run at the rotation speed R5.

As an optional embodiment, the operating condition includes a fourth operating condition in which the operating mode is a daytime operating mode and is in a shutdown state or a defrosting state;

The rotation speed of the air curtain fan 20 is pre-divided into a first rotation speed, a second rotation speed, a third rotation speed, a fourth rotation speed and a fifth rotation speed; wherein, the first rotation speed is higher than the second rotation speed, and the second rotation speed is higher than the second rotation speed. The rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

Then the acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan 20 according to the state parameters, includes:

When the operating condition is the fourth operating condition, obtain the door opening time of the compartment 11 as a state parameter;

When it is determined that the door opening time is not higher than the fifth time threshold, the air curtain fan 20 is controlled to not operate;

When it is determined that the door opening time is higher than the fifth time threshold and the door opening time is lower than the sixth time threshold, controlling the air curtain fan 20 to run at the fifth rotational speed;

When it is determined that the door opening time is not lower than the sixth time threshold, the air curtain fan 20 is controlled to run at the fourth rotational speed; wherein the fifth time threshold is smaller than the sixth time threshold.

In this embodiment, when the refrigerator is operating in the fourth working condition, the exchange rate of cold and heat inside and outside the compartment 11 is relatively low, so that the opening time of the door body is not higher than the fifth time threshold, the That is, when the opening time is very short and the cooling capacity is lost to a very low degree, controlling the air curtain fan 20 to not operate can greatly reduce the operating noise and energy consumption of the air curtain fan 20, and at the same time, it will not affect the temperature of the compartment 11. Influence; by controlling the air curtain fan 20 to the lowest level when the door opening time is higher than the fifth time threshold and the door opening time is lower than the sixth time threshold, that is, the door opening time is moderate The fifth speed of rotation is controlled, and when the door opening time is not lower than the sixth time threshold, that is, when the door is opened for a long time, the air curtain fan 20 is controlled to be higher than the fifth speed. The high fourth rotation speed operation can meet the isolation cooling requirements corresponding to different door opening times, thereby reducing the temperature fluctuation of the compartment 11, and preventing the operating noise of the air curtain fan 20 from being too high and having a greater impact on users .

It should be noted that, in specific implementation, the fifth time threshold and the sixth time threshold may be set according to the actual environment and cooling demand, which are not limited herein. Optionally, the fifth time threshold is 8s, and the sixth time threshold is 1min.

Exemplarily, set the fifth time threshold to be 8s and the sixth time threshold to be 1min. When the user opens the door of the refrigerator compartment 11, it may be that the time collection and recording module installed on the refrigerator in advance receives the door opening. The signal starts to work immediately, record and judge the door opening time t of the whole process; control the rotation speed of the air curtain fan 20 according to the length of the door opening time; for example: when the door opening time is very short t≤8s, no obvious temperature exchange occurs in the compartment 11, There is basically no loss of cooling capacity, but the high-speed operation of the fan will cause the loss of cooling capacity and the noise of starting and stopping, so the air curtain fan 20 can be controlled to not work; when the door opening time is 8s < t < 1min, the air curtain fan 20 can be controlled to rotate at the speed R5 is working and running. When the door opening time is further increased and t ≥ 1min, due to the long opening time, it is easy to cause the loss of cooling capacity. Therefore, the fan speed is appropriately increased, and the air curtain fan 20 is controlled to work at the speed R4. With reference to FIG. 11 , the specific working process of the controller 30 is as follows: S31 , detect whether the door body is open, if so, go to step S32 ; S32 , obtain the operating condition of the refrigerator; S33 , determine whether the operating condition is not is the fourth working condition, if yes, then enter step S34; S34, obtain the door opening time t of the compartment 11 as a state parameter; S35, determine the size relationship between t and 8s and 1min, if If t≤8s, go to step S312, if 8s<t<1min, go to step S313, if t≥1min, go to step S314; S311, control the air curtain fan 20 not to run; S321, control the air curtain fan 20 to rotate at the speed R5 runs; S331, control the air curtain fan 20 to run at the rotational speed R4.

Referring to FIG. 12 , it is a schematic flowchart of a method for controlling an air curtain fan of a refrigerator according to an embodiment of the present invention.

An embodiment of the present invention provides a method for controlling an air curtain fan of a refrigerator, including:

S201. When it is detected that the compartment door of the refrigerator is opened, the operating condition of the refrigerator is acquired;

S202. Acquire a state parameter corresponding to the operating condition, and control the rotational speed of an air curtain fan of the refrigerator according to the state parameter; wherein, the air curtain fan is used to be close to the door inside the compartment An air curtain is formed at the position of the body, and the state parameter includes at least one of a temperature difference between the interior of the compartment and an external environment and an opening time of the door of the compartment.

Compared with the prior art, the method for controlling the air curtain fan of the refrigerator disclosed in the embodiment of the present invention obtains the operating conditions of the refrigerator when the opening of the compartment door is detected, and then acquires the state parameters corresponding to the operating conditions. The state parameter includes at least one of the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment, and then the speed of the air curtain fan is controlled according to the state parameter, so that the speed of the air curtain fan meets different outdoor ambient temperatures. And/or the isolation cooling demand under different door opening times, to prevent the air curtain fan from maintaining a constant high-speed operation, which can effectively reduce the operating noise and energy consumption of the air curtain fan.

As an improvement of the above solution, the operating condition includes a first operating condition in which the operating mode is a daytime operating mode and is in a non-stop state and a non-defrosting state;

Then, the acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan of the refrigerator according to the state parameters, includes:

When the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters;

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is not higher than the first time threshold, or the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold And the door opening time is not higher than the second time threshold, or, when the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than the third time threshold, the refrigerator is controlled. The air curtain fan does not operate;

The first temperature threshold is higher than the second temperature threshold, the first time threshold is smaller than the second time threshold, and the second time threshold is smaller than the third time threshold.

In this embodiment, since the temperature difference is not lower than the first temperature threshold and the door opening time is not higher than the first time threshold, that is, the heat exchange speed between indoor and outdoor is high but the door opening time is short, Or, the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold, and the door opening time is not higher than the second time threshold, that is, the speed of heat exchange between indoor and outdoor is moderate but the door is opened The time is short, or, the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than the third time threshold, that is, when the speed of heat and cold exchange between indoor and outdoor is low but the door opening time is medium, The degree of cooling loss in the compartment is extremely low. At this time, controlling the air curtain fan to not operate can greatly reduce the operating noise and energy consumption of the air curtain fan, and at the same time, it will not affect the temperature of the compartment.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is not lower than a fourth time threshold, the air curtain fan is controlled to run at the first rotational speed; wherein the fourth The time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. Therefore, when the temperature difference is not lower than the first temperature threshold and the door opening time is not lower than the fourth time threshold, that is, the speed of heat and cold exchange between indoor and outdoor When the air curtain fan is controlled to run at the highest first rotation speed when it is relatively high and the opening time is very long, resulting in the loss of cooling capacity to a very high degree, the current demand for extremely high isolation cooling capacity can be quickly met, thereby reducing the number of compartments. At the same time, the noise generated by the air curtain fan has less impact on the user.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is not lower than the first temperature threshold and the door opening time is higher than the first time threshold and the door opening time is lower than a fourth time threshold, or the temperature difference is lower than When the first temperature threshold and the temperature difference are higher than the second temperature threshold and the door opening time is not less than the fourth time threshold, the air curtain fan is controlled to run at the second rotational speed; Wherein, the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. There is a certain degree of shading effect on the operating noise of the device, so when the temperature difference is not lower than the first temperature threshold and the door opening time is higher than the first time threshold and the door opening time is lower than the first temperature threshold Four time thresholds, that is, when the heat exchange rate between indoor and outdoor is high and the door opening time is moderate, resulting in a high degree of cooling loss, or, the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the first temperature difference. When the second temperature threshold and the door opening time is not lower than the fourth time threshold, that is, when the indoor and outdoor heat and cold exchange speed is moderate but the door opening time is very long, resulting in a high degree of cooling loss, control the air curtain The fan runs at the higher second rotational speed, which can quickly meet the current high isolation cooling demand, thereby reducing the temperature fluctuation of the compartment, and at the same time, the noise generated by the air curtain fan has less impact on the user.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is lower than the first temperature threshold and the temperature difference is higher than the second temperature threshold and the door opening time is higher than the second time threshold and the door opening time is lower than the second temperature threshold Four time thresholds, or, when the temperature difference is not higher than the second temperature threshold and the door opening time is not lower than the fourth time threshold, controlling the air curtain fan to run at the third rotational speed; Wherein, the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. There is a certain degree of shadowing effect on the operating noise of the The threshold value and the door opening time is lower than the fourth time threshold, that is, when the indoor and outdoor cooling and heat exchange speed is moderate and the door opening time is moderate, resulting in moderate loss of cooling capacity, or the temperature difference is not higher than the second time threshold. The temperature threshold and the door opening time is not lower than the fourth time threshold, that is, when the indoor and outdoor cold and heat exchange speed is low but the door opening time is very long, resulting in a moderate loss of cooling capacity, control the air curtain fan Running at the third rotational speed can quickly meet the current demand for moderate isolation cooling capacity, thereby reducing room temperature fluctuations, and at the same time, the noise generated by the air curtain fan has less impact on users.

As an improvement to the above solution, the rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein the first rotational speed is higher than the second rotational speed , the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

After the operating condition is the first operating condition, the temperature difference between the interior of the compartment and the external environment and the door opening time of the compartment are obtained as state parameters, further comprising: :

When it is determined that the temperature difference is not higher than the second temperature threshold and the door opening time is higher than the third time threshold and the door opening time is lower than the fourth time threshold, controlling the air curtain fan operating at the fourth rotational speed; wherein the fourth time threshold is greater than the third time threshold.

In this embodiment, when the operating condition of the refrigerator is the first operating condition, the user generally uses the refrigerator more times, and the ambient background noise is relatively high, and the operating noise of the compressor and other noisy components has an adverse effect on the air curtain fan. There is a certain degree of shading effect on the operating noise of the device, so when the temperature difference is not higher than the second temperature threshold and the door opening time is higher than the third time threshold and the door opening time is lower than the third time threshold Four time thresholds, that is, when the indoor and outdoor cold and heat exchange speed is low and the door opening time is moderate, resulting in a low degree of cooling loss, the air curtain fan is controlled to run at the fourth speed, which can quickly meet the current low isolation. Cooling demand, thereby reducing room temperature fluctuations, and at the same time, the noise generated by the air curtain fan has less impact on users.

As an improvement of the above solution, the operating conditions include a second operating condition in which the operating mode is a nighttime operating mode and a third operating condition in which the operating mode is a silent operating mode;

The rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein, the first rotational speed is higher than the second rotational speed, and the second rotational speed higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

Then, the acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan of the refrigerator according to the state parameters, includes:

When the operating condition is the second operating condition or the third operating condition, obtain the temperature difference between the interior of the compartment and the external environment as a state parameter;

When it is determined that the temperature difference is not lower than the first temperature threshold, controlling the air curtain fan to run at the third rotational speed;

When it is determined that the temperature difference is lower than the first temperature threshold and higher than the second temperature threshold, controlling the air curtain fan to operate at the fourth rotational speed;

When it is determined that the temperature difference is not higher than the second temperature threshold, the air curtain fan is controlled to operate at the fifth rotational speed; wherein the first temperature threshold is higher than the second temperature threshold.

In this embodiment, when the refrigerator operates in the second working condition or the third working condition, the user uses the refrigerator less frequently, and the ambient background noise is low, so the noise of the air curtain fan is more likely to cause The user is disgusted, and even affects the normal sleep and rest. Therefore, when the temperature difference is not lower than the first temperature threshold, that is, when the indoor and outdoor cold and heat exchange speed is relatively fast, the air curtain fan is controlled to be at a moderate third rotational speed. Operation, and, when the temperature difference is lower than the first temperature threshold and higher than the second temperature threshold, that is, when the speed of heat and cold exchange between indoor and outdoor is moderate, control the air curtain fan to lower the fourth temperature. speed operation, and, when the temperature difference is not higher than the second temperature threshold, that is, when the indoor and outdoor cold and heat exchange rates are low, the air curtain fan is controlled to operate at the lowest fifth speed, which can meet the The isolation cooling demand corresponding to the different cooling and heat exchange rates inside and outside the room, thereby reducing the temperature fluctuation of the room, and preventing the operating noise of the air curtain fan from being too high and having a greater impact on the user.

As an improvement of the above solution, the operating condition includes a fourth operating condition in which the operating mode is a daytime operating mode and is in a shutdown state or a defrosting state;

The rotational speed of the air curtain fan is pre-divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed and a fifth rotational speed; wherein, the first rotational speed is higher than the second rotational speed, and the second rotational speed higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

Then, the acquiring state parameters corresponding to the operating conditions, and controlling the rotational speed of the air curtain fan of the refrigerator according to the state parameters, includes:

When the operating condition is the fourth operating condition, obtain the door opening time of the compartment as a state parameter;

When it is determined that the door opening time is not higher than the fifth time threshold, controlling the air curtain fan to not operate;

When it is determined that the door opening time is higher than the fifth time threshold and the door opening time is lower than the sixth time threshold, controlling the air curtain fan to run at the fifth rotational speed;

When it is determined that the door opening time is not lower than the sixth time threshold, the air curtain fan is controlled to run at the fourth rotation speed; wherein the fifth time threshold is smaller than the sixth time threshold.

In this embodiment, when the refrigerator operates in the fourth operating condition, the exchange rate of cold and heat inside and outside the compartment is relatively low, so the door is opened for a time not higher than the fifth time threshold, that is, the door is opened. When the time is very short and the cooling capacity is lost to a very low degree, controlling the air curtain fan to not operate can greatly reduce the operating noise and energy consumption of the air curtain fan, and will not affect the temperature of the compartment; When the door opening time is higher than the fifth time threshold and the door opening time is lower than the sixth time threshold, that is, when the door opening time is moderate, control the air curtain fan at the lowest fifth speed run, and, when the door opening time is not lower than the sixth time threshold, that is, when the door opening time is longer, the air curtain fan is controlled at the fourth rotational speed higher than the fifth rotational speed It can meet the isolation cooling demand corresponding to different door opening times, thereby reducing the temperature fluctuation of the room, and preventing the operating noise of the air curtain fan from being too high and having a great impact on the user.

It should be noted that, for the specific description of the foregoing method embodiments, reference may be made to the foregoing apparatus embodiments, and details are not described herein again.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications may also be regarded as It is the protection scope of the present invention.

Claims (9)

1. A refrigerator, characterized by comprising:

a box body, wherein a compartment is arranged in the box body; wherein a door body is arranged at the opening of the chamber;

the air curtain fan is used for forming an air curtain at a position close to the door body inside the compartment;

a controller to:

when the door body is detected to be opened, acquiring the operation condition of the refrigerator;

acquiring state parameters corresponding to the operating conditions, and controlling the rotating speed of the air curtain fan according to the state parameters; the state parameters comprise at least one of temperature difference between the interior of the chamber and the external environment and opening time of a door body of the chamber.

2. The refrigerator according to claim 1, wherein the operation condition includes a first condition that the operation mode is a daytime operation mode and is in a non-stop state and a non-defrosting state;

then, the obtaining of the state parameter corresponding to the operating condition and the controlling of the rotating speed of the air curtain fan according to the state parameter include:

when the operation working condition is the first working condition, acquiring the temperature difference between the interior and the exterior environment of the compartment and the opening time of a door body of the compartment as state parameters;

when the temperature difference is determined to be not lower than a first temperature threshold and the door opening time is determined to be not higher than a first time threshold, or the temperature difference is lower than the first temperature threshold and the temperature difference is higher than a second temperature threshold and the door opening time is not higher than a second time threshold, or the temperature difference is not higher than the second temperature threshold and the door opening time is not higher than a third time threshold, controlling the air curtain fan not to operate;

wherein the first temperature threshold is higher than the second temperature threshold, the first time threshold is less than the second time threshold, and the second time threshold is less than the third time threshold.

3. The refrigerator of claim 2, wherein a rotation speed of the air curtain fan is divided into a first rotation speed, a second rotation speed, a third rotation speed, a fourth rotation speed, and a fifth rotation speed in advance; wherein the first rotational speed is higher than the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

when the operating condition is the first operating condition, acquire the difference in temperature between indoor portion and the external environment and the door body opening time of compartment to after as state parameter, still include:

when the temperature difference is not lower than the first temperature threshold and the opening time of the door body is not lower than a fourth time threshold, controlling the air curtain fan to operate at the first rotating speed; wherein the fourth time threshold is greater than the third time threshold.

4. The refrigerator of claim 2, wherein a rotation speed of the air curtain fan is divided into a first rotation speed, a second rotation speed, a third rotation speed, a fourth rotation speed, and a fifth rotation speed in advance; wherein the first rotational speed is higher than the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

when the operating condition is the first operating condition, acquire the difference in temperature between indoor portion and the external environment and the door body opening time of compartment to after as state parameter, still include:

when the temperature difference is determined to be not lower than the first temperature threshold, the door opening time is higher than the first time threshold, and the door opening time is lower than a fourth time threshold, or the temperature difference is lower than the first temperature threshold, the temperature difference is higher than the second temperature threshold, and the door opening time is not lower than the fourth time threshold, controlling the air curtain fan to operate at the second rotating speed; wherein the fourth time threshold is greater than the third time threshold.

5. The refrigerator of claim 2, wherein the rotational speed of the air curtain fan is divided into a first rotational speed, a second rotational speed, a third rotational speed, a fourth rotational speed, and a fifth rotational speed in advance; wherein the first rotational speed is higher than the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

when the operating condition is the first operating condition, acquire the difference in temperature between indoor portion and the external environment and the door body opening time of compartment to after as state parameter, still include:

when it is determined that the temperature difference is lower than the first temperature threshold, the temperature difference is higher than the second temperature threshold, the door opening time is higher than the second time threshold, and the door opening time is lower than a fourth time threshold, or the temperature difference is not higher than the second temperature threshold, and the door opening time is not lower than the fourth time threshold, controlling the air curtain fan to operate at the third rotating speed; wherein the fourth time threshold is greater than the third time threshold.

6. The refrigerator of claim 2, wherein a rotation speed of the air curtain fan is divided into a first rotation speed, a second rotation speed, a third rotation speed, a fourth rotation speed, and a fifth rotation speed in advance; wherein the first rotational speed is higher than the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

when the operating condition is the first operating condition, acquire the difference in temperature between indoor portion and the external environment and the door body opening time of compartment to after as state parameter, still include:

when the temperature difference is determined to be not higher than the second temperature threshold, the opening time of the door body is determined to be higher than the third time threshold, and the opening time of the door body is determined to be lower than a fourth time threshold, controlling the air curtain fan to operate at a fourth rotating speed; wherein the fourth time threshold is greater than the third time threshold.

7. The refrigerator according to claim 1, wherein the operation conditions include a second condition in which the operation mode is a night operation mode and a third condition in which the operation mode is a mute operation mode;

the rotating speed of the air curtain fan is divided into a first rotating speed, a second rotating speed, a third rotating speed, a fourth rotating speed and a fifth rotating speed in advance; wherein the first rotational speed is higher than the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

then, the obtaining of the state parameter corresponding to the operating condition and the controlling of the rotating speed of the air curtain fan according to the state parameter include:

when the operation working condition is the second working condition or the third working condition, acquiring the temperature difference between the interior of the compartment and the external environment as a state parameter;

when the temperature difference is determined to be not lower than the first temperature threshold value, controlling the air curtain fan to operate at the third rotating speed;

controlling the air curtain fan to operate at the fourth rotational speed when it is determined that the temperature difference is less than the first temperature threshold and greater than a second temperature threshold;

controlling the air curtain fan to operate at the fifth rotational speed when it is determined that the temperature difference is not greater than the second temperature threshold; wherein the first temperature threshold is higher than the second temperature threshold.

8. The refrigerator according to claim 1, wherein the operation condition includes a fourth condition that the operation mode is a daytime operation mode and is in a shutdown state or a defrosting state;

the rotating speed of the air curtain fan is divided into a first rotating speed, a second rotating speed, a third rotating speed, a fourth rotating speed and a fifth rotating speed in advance; wherein the first rotational speed is higher than the second rotational speed, the second rotational speed is higher than the third rotational speed, the third rotational speed is higher than the fourth rotational speed, and the fourth rotational speed is higher than the fifth rotational speed;

then, the obtaining of the state parameter corresponding to the operating condition and the controlling of the rotating speed of the air curtain fan according to the state parameter include:

when the operation working condition is the fourth working condition, acquiring the opening time of a door body of the compartment as a state parameter;

when the door body opening time is determined to be not higher than a fifth time threshold, controlling the air curtain fan not to operate;

when the door opening time is determined to be higher than the fifth time threshold and the door opening time is determined to be lower than a sixth time threshold, controlling the air curtain fan to operate at the fifth rotating speed;

when the opening time of the door body is not lower than the sixth time threshold, controlling the air curtain fan to operate at the fourth rotating speed; wherein the fifth time threshold is less than the sixth time threshold.

9. A control method of an air curtain fan of a refrigerator is characterized by comprising the following steps:

when the opening of a compartment door body of the refrigerator is detected, the operation condition of the refrigerator is obtained;

acquiring a state parameter corresponding to the operating condition, and controlling the rotating speed of an air curtain fan of the refrigerator according to the state parameter; the air curtain fan is used for forming an air curtain at the position, close to the door body, inside the compartment, and the state parameters comprise at least one of temperature difference between the inside of the compartment and the external environment and opening time of the door body of the compartment.

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