Refrigerator and control method thereof

Abstract

The invention discloses a refrigerator and a control method thereof. A smell sensor is carried in the refrigerator and used for detecting the concentration of gas flowing through an air return opening, and a draught fan is used for controlling the flow speed of the gas flowing through the air return opening; the air velocity sensor is used for detecting the gas velocity; the operation condition of the refrigerator is determined by detecting the operation state of the compressor and the operation state of the refrigeration fan; the gas flow rate in the refrigerating chamber is detected; matching a corresponding current rotating speed in a preset rotating speed control library according to the operation condition and the gas flow rate; and controlling the fan to operate according to the current rotating speed. According to the scheme, the airflow flowing through the surface of the odor sensor can be accurately controlled, the normal detection function of the odor sensor is ensured, the reliability of the intelligent odor removal function is improved, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a control method thereof. Background Art

[0002] With the improvement of living standards, more and more types of food are stored in refrigerators, and food will emit various odors. The odor problem in refrigerators has become one of the main pain points for refrigerator users. With the development of odor sensor technology, many refrigerator manufacturers have begun to install odor sensors in refrigerators, and use odor sensors to monitor the odor in the refrigerator in real time. When the odor concentration value exceeds the set value, the system automatically turns on the deodorization device to perform intelligent deodorization. The odor sensor perceives the odor in the refrigerator mainly by driving the odor molecules through the surface of the odor sensor through the airflow, and being adsorbed or captured by the sensitive material of the odor sensor to achieve odor perception. Therefore, the airflow will affect the accuracy of the odor sensor in sensing the odor. However, the environment inside the refrigerator is complex and changes greatly. In particular, the user's opening and closing of the door and the start and stop of the compressor will affect the airflow inside the refrigerator, which will affect the accuracy of the odor sensor in sensing the odor, and ultimately affect the intelligent deodorization function and reduce the user experience. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a control method thereof, which can accurately control the air flow velocity flowing through the surface of the odor sensor, ensure the normal detection function of the odor sensor, improve the reliability of the intelligent odor purification function, and enhance the user experience.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber;

[0006] A door, used for opening and closing the storage room;

[0007] an odor sensor, disposed at the return air outlet of the refrigerating chamber, for detecting the concentration of the gas flowing through the return air outlet;

[0008] A refrigeration fan is arranged in the refrigeration chamber and is used to promote the gas in the refrigeration chamber to pass through the evaporator to achieve cooling;

[0009] A fan is arranged in the refrigerating chamber and close to the odor sensor, and the fan is used to control the flow rate of the gas flowing through the return air port;

[0010] An air flow rate sensor is arranged in the refrigerating chamber and close to the odor sensor, and the air flow rate sensor is used to detect the gas flow rate;

[0011] The controller is configured as:

[0012] Detecting the operating state of the compressor and the operating state of the refrigeration fan to determine the operating condition of the refrigerator;

[0013] detecting a gas flow rate in the refrigerating chamber;

[0014] Matching a corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate;

[0015] The fan is controlled to operate according to the current rotation speed.

[0016] Preferably, the controller is further configured to:

[0017] When it is detected that the compressor and the refrigeration fan are both in operation, determining that the operating condition is a normal condition;

[0018] When it is detected that the compressor is in a shutdown state, it is determined that the operating condition is a shutdown condition.

[0019] Preferably, the controller is further configured to:

[0020] When the operating condition is a normal condition and the gas flow rate is within a preset first range, matching a first rotation speed as the current rotation speed;

[0021] When the operating condition is a normal condition and the gas flow rate is within a preset second range, matching the second rotation speed as the current rotation speed;

[0022] Among them, the first rotational speed is higher than the second rotational speed, the maximum value of the first range is not higher than the minimum value of the air flow speed range suitable for the odor sensor to work, and the minimum value of the second range is not lower than the maximum value of the air flow speed range.

[0023] Furthermore, the controller is also configured to:

[0024] After controlling the fan to run for a preset first time period using the first speed as the current speed, detecting the gas flow rate in the refrigerating chamber again;

[0025] When the gas flow rate detected again is still within the first range, controlling the fan to run at a preset third speed;

[0026] After controlling the fan to run for the first time period using the second speed as the current speed, detecting the gas flow rate in the refrigerating chamber again;

[0027] When the gas flow rate detected again is still within the second range, controlling the fan to run at a preset fourth speed;

[0028] The third speed is higher than the first speed, and the fourth speed is lower than the second speed.

[0029] Preferably, the controller is further configured to:

[0030] When the operating condition is a shutdown condition, obtaining a current rotation speed of the fan;

[0031] When the current rotation speed is not lower than a preset rotation speed threshold, keeping the fan running at the current rotation speed;

[0032] When the current rotation speed is lower than the rotation speed threshold, controlling the fan to run at a preset fifth rotation speed;

[0033] Wherein, the fifth speed is not lower than the speed threshold.

[0034] Preferably, the controller is further configured to:

[0035] When it is detected that the refrigerator door is in an open state, the fan is controlled to stop running.

[0036] As a preferred solution, the refrigerator further comprises:

[0037] A heating wire is arranged in the refrigerating chamber and close to the odor sensor, and the heating wire is used to heat the air flowing through the odor sensor;

[0038] a temperature sensor, disposed in the refrigerating chamber and close to the odor sensor, the temperature sensor being used to detect the temperature of the airflow flowing through the surface of the odor sensor;

[0039] The controller is also configured to:

[0040] When the odor sensor starts to work, detecting the air flow temperature of the air flow flowing through the surface of the temperature sensor;

[0041] Matching the corresponding operating power in a preset power matching library according to the airflow temperature;

[0042] The heating wire is controlled to operate at the operating power.

[0043] Furthermore, the refrigerator further comprises:

[0044] a dehumidification device, arranged in the refrigerating chamber and close to the odor sensor, wherein the moisture absorption device is used to dehumidify the air flowing through the odor sensor;

[0045] A humidity sensor is disposed in the refrigerating chamber and close to the odor sensor, and is used to detect the humidity of the airflow passing through the dehumidification device;

[0046] The controller is also configured to:

[0047] detecting the current humidity of the airflow passing through the dehumidification device;

[0048] When the current humidity exceeds a preset first humidity threshold, the operating parameters of the fan and the heating wire are switched from current initial parameters to preset parameters;

[0049] Among them, the first humidity threshold is not lower than the maximum value of the surface airflow humidity range suitable for the odor sensor to operate.

[0050] As an improvement of the above solution, the controller is further configured as follows:

[0051] After controlling the fan and the heating wire to operate for a preset second time period with the operating parameters, detecting the current humidity of the airflow passing through the dehumidification device again, and calculating the current difference between the first humidity threshold and the current humidity detected again;

[0052] When the current difference is less than the preset humidity return difference, the fan and the heating wire are continuously controlled to run for the second time period with the preset parameters, the current difference is updated with the re-detected current humidity, and the updated current difference is judged until the current difference is not less than the humidity return difference;

[0053] When the current difference is not less than the humidity return difference, the operating parameters of the fan and the heating wire are restored to the initial parameters, and the concentration value of the odor sensor is read, and odor removal control is performed according to the concentration value.

[0054] The present invention also provides a refrigerator control method, the refrigerator comprising:

[0055] a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber;

[0056] A door, used for opening and closing the storage room;

[0057] an odor sensor, disposed at the return air outlet of the refrigerating chamber, for detecting the concentration of the gas flowing through the return air outlet;

[0058] A refrigeration fan is arranged in the refrigeration chamber and is used to promote the gas in the refrigeration chamber to pass through the evaporator to achieve cooling;

[0059] A fan is arranged in the refrigerating chamber and close to the odor sensor, and the fan is used to control the flow rate of the gas flowing through the return air port;

[0060] An air flow rate sensor is arranged in the refrigerating chamber and close to the odor sensor, and the air flow rate sensor is used to detect the gas flow rate;

[0061] Controller;

[0062] The method comprises:

[0063] Detecting the operating state of the compressor and the operating state of the refrigeration fan to determine the operating condition of the refrigerator;

[0064] detecting a gas flow rate in the refrigerating chamber;

[0065] Matching a corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate;

[0066] The fan is controlled to operate according to the current rotation speed.

[0067] Compared with the prior art, the refrigerator and its control method disclosed in the present invention are equipped with an odor sensor in the refrigerator for detecting the concentration of the gas flowing through the return air port, and a fan for controlling the flow rate of the gas flowing through the return air port; and an air flow rate sensor for detecting the gas flow rate; determining the operating condition of the refrigerator by detecting the operating state of the compressor and the operating state of the refrigeration fan; detecting the gas flow rate in the refrigeration chamber; matching the corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate; and controlling the operation of the fan according to the current speed. The present application scheme can accurately control the flow rate of the airflow flowing through the surface of the odor sensor, ensure the normal detection function of the odor sensor, improve the reliability of the intelligent deodorization function, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0069] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0070] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0071] Figure 4 is a schematic diagram of the installation positions of the fan and the odor sensor provided in an embodiment of the present invention;

[0072] Figure 5 is another schematic diagram of the installation position of the fan and the odor sensor provided in an embodiment of the present invention;

[0073] Figure 6 is a structural schematic diagram of a sensor module provided by an embodiment of the present invention;

[0074] Figure 7is a schematic diagram of the connection between the controller and other hardware devices provided by an embodiment of the present invention;

[0075] Figure 8 is a schematic diagram of a control flow of a controller provided by the present invention under a first embodiment;

[0076] Fig. 9 is a schematic diagram of a control flow of a controller provided by the present invention in a second embodiment;

[0077] Fig.10 is a schematic diagram of a control flow of a controller provided by the present invention in a third embodiment;

[0078] Fig.11 is a structural schematic diagram of a sensor module provided by another embodiment of the present invention;

[0079] Fig.12 It is a schematic diagram of the control flow of the controller provided by the present invention in the fourth embodiment.

[0080] Among them, 100, refrigerator; 1, compressor; 2, evaporator; 3, capillary; 4, condenser; 101, return air outlet; 102, sensor module; 103, fan; 105, refrigeration fan; 1021, odor sensor; 1022, air flow rate sensor; 1011, heating wire; 1102 temperature sensor; 1103, dehumidification device; 1104, humidity sensor. DETAILED DESCRIPTION

[0081] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0082] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0083] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0084] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] See also Figure 1 , Figure 1 1 is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body defining a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0086] See also Figure 2 , Figure 2 : is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as refrigerators and freezers according to different uses. They can also include variable temperature rooms, vacuum drawers, moisturizing drawers, etc. Each storage room corresponds to one or more door bodies, for example, Figure 2 The upper storage room is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to achieve drawer-like storage. The refrigerator door is provided with a display screen, which is used to display prompt information and receive user touch operations.

[0087] See also Figure 3 , Figure 3The schematic diagram of the structure of the refrigeration system in the refrigerator provided by the embodiment of the present invention, the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). 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: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 4; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 4, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 3, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0088] See also Figure 4-5 , Figure 4-5 : is a schematic diagram of the installation position of the fan and the odor sensor provided in the embodiment of the present invention. The refrigerator lowers the temperature by circulating the refrigerant. The refrigerant is compressed into high-pressure gas in the condenser, and then enters the evaporator through the expansion valve, becoming low-temperature and low-pressure steam, thereby absorbing the heat inside the refrigerator and lowering the temperature inside the refrigerator. The cold air generated in such a circulation process is discharged through the air outlet provided on the refrigeration air duct, and the air outlet connects the refrigeration chamber and the refrigeration air duct. In addition to the air outlet, the storage chamber is also provided with a return air port 101. The function of the return air port 101 is to introduce the air inside the storage chamber into the refrigerator evaporator to continue the refrigeration cycle. The return air port 101 is generally located at the lower part of the storage chamber. A refrigeration fan 105 is generally provided inside the return air port 101. The refrigeration fan can accelerate the flow speed of the air flow in the refrigeration chamber and the refrigeration air duct through operation, and promote the gas in the refrigeration chamber to pass through the evaporator to achieve cooling. By increasing the speed of the refrigeration fan, the air flow speed is accelerated. At this time, the heat exchange efficiency between the refrigerator and the evaporator is improved, and the temperature of the refrigeration chamber is reduced. Reduce the speed of the refrigeration fan and the air flow rate. At this time, the heat exchange efficiency between the refrigerator and the evaporator is reduced, and the temperature of the refrigerator compartment increases.

[0089] The refrigerating chamber is further provided with a sensor module 102, which is arranged at the return air outlet 101 of the refrigerating chamber. Figure 6 , is a schematic diagram of the structure of a sensor module provided by an embodiment of the present invention;

[0090] The sensor module 102 is provided with an odor sensor 1021 inside, and the odor sensor 1021 is used to detect the concentration of the gas flowing through the return air port 101. The food in the refrigerator is placed in various positions. After the odor sensor 1021 is installed, it should sense the comprehensive odor inside the refrigerator, rather than the odor of a certain area. Therefore, through the early refrigerator fluid simulation, it is found that the flow rate is the largest at the return air port 101 of the refrigerator refrigerator compartment. At the same time, the return air port 101 collects the airflow at various positions inside the refrigerator, which can better reflect the odor concentration in the refrigerator. Therefore, the odor sensor 1021 is installed near the return air port 101.

[0091] The main principle of the odor sensor 1021 sensing odor concentration is: the gas-sensitive material undergoes an oxidation-reduction reaction with the odor molecules, causing the resistance of the odor sensor to change, and the change in resistance causes a change in voltage. Therefore, the gas concentration can be reflected by measuring the change in voltage. Therefore, we can set it so that when the voltage value of the odor sensor is greater than or equal to a certain voltage threshold V, the system controls the odor purification module to turn on and purify the odor; when the voltage value of the odor sensor is less than the voltage threshold V, the odor purification module is controlled to turn off, thereby realizing intelligent odor purification. And through testing and verification, when the airflow velocity flowing through the surface of the odor sensor is ≥Xt, the responsiveness, recovery and sensitivity of the odor sensor meet the functional requirements; but when the airflow velocity is <Xt, the response and recovery time of the odor sensor will be extended, and the sensitivity will decrease, thereby affecting the function.

[0092] Therefore, the sensor module 102 is further provided with an air flow rate sensor 1022 near the odor sensor 1021, and the air flow rate sensor 1022 is used to detect the gas flow rate.

[0093] The refrigerating chamber is also provided with a fan 103, which is arranged in the storage chamber and is arranged near the odor sensor 1021. The fan 103 is used to control the flow rate of the gas flowing through the return air port 101. After simulation and actual testing, it is confirmed that when the refrigerator is unloaded or a small amount of food is stored, when the refrigerator compressor is in refrigeration operation, the air flow velocity X at the return air port is: X1≥X>X2, Xt<X2. Therefore, when a small amount of food is stored in the refrigerator, the odor sensor can work normally under this air flow condition when the refrigerator is turned on for refrigeration. However, now the refrigerator refrigeration is turned on for a period of time and then shut down. Since there is no corresponding refrigeration fan running, the air flow circulation speed in the refrigerator drops significantly, and the air flow speed flowing through the surface of the odor sensor is far less than Xt. At this time, the function of the odor sensor will be affected. At the same time, as the user stores more food, it will obviously hinder the flow of air, resulting in a decrease in flow rate, thereby affecting the function of the odor sensor. To solve this technical problem, the present invention installs a fan 103 above the odor sensor 1021 and controls it through a series of methods, so that the operation of the fan 103 can control the airflow rate flowing through the surface of the odor sensor 1021. By controlling this airflow rate, the normal function of the odor sensor 1021 is ensured, the reliability of the intelligent odor purification function is increased, and the user experience is improved.

[0094] See also Figure 7 , is a schematic diagram of the connection between the controller and other hardware devices provided in an embodiment of the present invention. The controller described in the embodiment of the present invention is respectively connected to the compressor 1, the odor sensor 1021 and the fan 103, the air flow rate sensor 1022 and the refrigeration fan 105. The controller can control the reception of the detection data sent by the odor sensor 1021, and can also control the start and stop of the odor sensor 1021. The controller can also control the start and stop of the refrigeration fan 105, the compressor 1 and the fan 103, and control the speed of the refrigeration fan 105, the compressor 1 and the fan 103. The controller can also read the gas flow rate detected by the air flow rate sensor 1022.

[0095] See also Figure 8 , is a schematic diagram of the control flow of the controller provided by the present invention under the first embodiment. The controller specifically performs the following steps when working:

[0096] Step S1, detecting the operating state of the compressor and the operating state of the refrigeration fan to determine the operating condition of the refrigerator;

[0097] Step S2, detecting the gas flow rate in the refrigerating chamber;

[0098] Step S3, matching the corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate;

[0099] Step S4, controlling the operation of the fan according to the current rotation speed.

[0100] In the specific implementation, the air flow velocity is an important factor affecting the perception accuracy of the odor sensor. The operating state of the compressor and the opening of the refrigeration fan will affect the air flow in the refrigerator. When the refrigerator is in working state, since the refrigerator compressor works in stages, the operating conditions of the refrigerator are different in different periods. When the compressor is turned on, the refrigeration fan is turned on, and the air flow rate in the refrigerator is large; when the compressor stops running, the refrigeration fan is turned off, and the air flow rate in the refrigerator is small; when the user stores food in different positions and quantities, the air flow rate flowing through the surface of the odor sensor is also different. The above situation makes the air flow rate in the refrigerator fluctuate greatly, which is easy to cause the odor sensor to perceive the odor concentration inaccurately. Therefore, the device and method of the present invention are used for control: a fan and an air flow rate sensor are installed near the odor sensor, and the air flow rate sensor senses the air flow rate in real time, and controls the fan to run at different speeds. In the early stage, the air flow direction of the odor sensor installation position is simulated and verified, and the air flow rate flowing through the surface of the odor sensor under different working conditions is simulated, so that when performing odor control, the operating state of the compressor and the operating state of the refrigeration fan are detected, and the operating condition of the refrigerator is determined.

[0101] Detecting the gas flow rate in the refrigerating chamber, and matching the corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate;

[0102] The speed control library contains different operating conditions and one-to-one matching relationships between different gas flow rates and speeds, so the only current speed can be matched in the speed control library by detecting and determining the operating conditions and gas flow rates.

[0103] The fan is controlled to operate according to the current rotation speed.

[0104] The present application obtains the working condition of the refrigerator to evaluate the impact of the refrigerator refrigeration system on the airflow inside the refrigerator. Combined with the monitoring of the gas flow rate in the cold storage room, it can accurately evaluate whether the refrigerator airflow is appropriate, and then determine the fan speed accordingly. The current airflow is corrected, and the airflow accurately controls the airflow velocity flowing through the surface of the odor sensor to ensure the normal detection function of the odor sensor, improve the reliability of the intelligent odor purification function, and enhance the user experience.

[0105] In another embodiment provided by the present invention, the controller is further configured to:

[0106] When it is detected that the compressor and the refrigeration fan are both in operation, determining that the operating condition is a normal condition;

[0107] When it is detected that the compressor is in a shutdown state, it is determined that the operating condition is a shutdown condition.

[0108] When this embodiment is implemented, see Fig. 9 , is a schematic diagram of the control flow of the controller provided by the present invention in the second embodiment; when the controller identifies the operating condition, the following steps are specifically performed:

[0109] Step S901, detecting the operating status of the compressor and the operating status of the refrigeration fan;

[0110] Step S902, determining whether the compressor is in operation;

[0111] If not, execute step S903;

[0112] If yes, execute step S904;

[0113] Step S903, determining that the operating condition is a shutdown condition. That is, when it is detected that the compressor is in a shutdown state, determining that the operating condition is a shutdown condition.

[0114] Step S904, determining whether the refrigeration fan is in operation;

[0115] If yes, execute step S905;

[0116] If not, return to step S901;

[0117] Step S905, determining that the operating condition is a normal condition, that is, when the compressor and the refrigeration fan are both in operation, determining that the operating condition is a normal condition.

[0118] When the compressor and the refrigeration fan are both in operation, the refrigeration fan in the refrigerator will generate a certain amount of airflow. The airflow direction of the odor sensor installation location is studied and verified through simulation, and the airflow velocity flowing through the surface of the odor sensor under different working conditions is simulated. Under different working conditions, the airflow velocity is different and the fan speed is different to ensure the accuracy of the airflow correction.

[0119] In another embodiment provided by the present invention, the controller is further configured to:

[0120] When the operating condition is a normal condition and the gas flow rate is within a preset first range, matching a first rotation speed as the current rotation speed;

[0121] When the operating condition is a normal condition and the gas flow rate is within a preset second range, matching the second rotation speed as the current rotation speed;

[0122] Among them, the first rotational speed is higher than the second rotational speed, the maximum value of the first range is not higher than the minimum value of the air flow speed range suitable for the odor sensor to work, and the minimum value of the second range is not lower than the maximum value of the air flow speed range.

[0123] In the specific implementation of this embodiment, when the compressor is running, the refrigeration fan is turned on, and the refrigerator is in normal working condition, wind speed matching is performed.

[0124] When the gas flow rate X t When it is within the range of (0, X1), the first speed R1 rpm / min is matched as the current speed;

[0125] When the gas flow rate X t When in the range of (X2, +∞), the second speed R2 rpm / min is matched as the current speed;

[0126] It should be noted that, as a preferred solution, the air flow speed range suitable for the odor sensor to work is [X1, X2]. Therefore, the minimum value X1 of the air flow speed range suitable for the odor sensor to work is determined as the edge value within the first range, and the maximum value X2 of the air flow speed range suitable for the odor sensor to work is determined as the edge value within the second range.

[0127] The first speed is higher than the second speed. In a specific implementation, when the first speed is a positive number, the fan rotates forward to increase the airflow speed through the odor sensor. The second speed can be set to a negative number to reduce the airflow speed through the odor sensor.

[0128] By detecting the air flow velocity under normal working conditions, the fan is controlled to perform speed compensation to ensure that the air flow velocity of the odor sensor is within the air flow velocity range suitable for the odor sensor to work.

[0129] In another embodiment provided by the present invention, the controller is further configured to:

[0130] After controlling the fan to run for a preset first time period using the first speed as the current speed, detecting the gas flow rate in the refrigerating chamber again;

[0131] When the gas flow rate detected again is still within the first range, controlling the fan to run at a preset third speed;

[0132] After controlling the fan to run for a preset time period using the second speed as the current speed, detecting the gas flow rate in the refrigerating chamber again;

[0133] When the gas flow rate detected again is still within the second range, controlling the fan to run at a preset fourth speed;

[0134] The third speed is higher than the first speed, and the fourth speed is lower than the second speed.

[0135] When this embodiment is implemented, see Fig.10 , is a schematic diagram of a control flow of the controller provided by the present invention in the third embodiment. The controller performs the following steps:

[0136] Step S1001, determining whether the refrigerator is in normal working condition;

[0137] If yes, execute step S1002;

[0138] If not, execute other logic control;

[0139] Step S1002, determine the gas flow rate X t Is it within the range of (0, X1)?

[0140] If yes, execute step S1003;

[0141] If not, execute step S1007;

[0142] Step S1003, matching R1 as the current speed to control the fan to run for 5 minutes;

[0143] Step S1004, detecting the gas flow rate X in the refrigerating chamber again t ;

[0144] Step S1005, determine the gas flow rate X t Is it still within the range of (0, X1)?

[0145] If yes, execute step S1006;

[0146] If not, return to step S1001;

[0147] Step S1006, control the fan to run for 5 minutes with the preset R3, and return to step S1004;

[0148] Step S1007, determine the gas flow rate X t Is it within the range of (X2, +∞)?

[0149] If yes, execute step S1008;

[0150] If not, return to step S1001;

[0151] Step S1008, matching R2 as the current speed to control the fan to run for 5 minutes;

[0152] Step S1009, detecting the gas flow rate X in the refrigerating chamber again t ;

[0153] Step S1010, determining the gas flow rate X t Is it still within the range of (X2, +∞)?

[0154] If yes, execute step S1011;

[0155] If not, return to step S1001;

[0156] Step S1011, control the fan to run for 5 minutes with the preset R4, and return to step S1009.

[0157] It should be noted that the third speed is higher than the first speed, that is, after 5 minutes of wind speed compensation at the first speed, the air flow speed is still not within the air flow speed range suitable for work. At this time, the wind speed compensation is further increased, and the air flow speed is increased by the third speed until the wind speed meets the requirements.

[0158] The fourth speed is lower than the second speed, that is, after 5 minutes of wind speed compensation at the fourth speed, the air flow speed is still not within the suitable air flow speed range for work. At this time, the wind speed compensation is further increased, and the air flow speed is further reduced by the fourth speed until the wind speed meets the requirements.

[0159] Preliminary compensation can be applied to most scenarios and reduce energy consumption. Through the two-stage wind speed compensation setting, the tolerance of wind speed compensation can be improved. When the initial wind speed compensation still does not meet the requirements, the compensation amount can be increased to ensure that the airflow is within the airflow speed range suitable for the odor sensor.

[0160] In another embodiment provided by the present invention, the controller is further configured to:

[0161] When the operating condition is a shutdown condition, obtaining a current rotation speed of the fan;

[0162] When the current rotation speed is not lower than a preset rotation speed threshold, keeping the fan running at the current rotation speed;

[0163] When the current rotation speed is lower than the rotation speed threshold, controlling the fan to run at a preset fifth rotation speed;

[0164] Wherein, the fifth speed is not lower than the speed threshold.

[0165] During the implementation of this embodiment, when the temperature of the refrigerator compartment drops to the point where the compressor stops running, the refrigeration fan is turned off. At this time, the air flow rate in the refrigerator compartment is relatively small. When the user stores food in different positions and quantities, the air flow rate passing through the surface of the odor sensor is also different. The above situation causes the air flow rate in the refrigerator compartment to fluctuate greatly, which can easily lead to inaccurate perception of odor concentration by the odor sensor.

[0166] Under a stop condition where the compressor stops running, the current rotation speed of the fan is obtained.

[0167] If the fan is running at a higher wind speed at this time, that is, the current speed is not lower than the preset speed threshold, the fan is kept running at the current speed; if the fan is running at a lower speed at this time, that is, the current speed is lower than the speed threshold, it is switched to R5 rpm / min operation, and the fifth speed is not lower than the speed threshold.

[0168] When the compressor is running and the refrigeration fan is turned on, the air flow rate in the refrigerator compartment will increase, so the fan speed can be reduced to ensure that the air flow rate passing through the surface of the odor sensor is within the range of [X1, X2]. At the same time, two different speeds can be set. When the compressor is turned on, the fan can run at a low speed, so that the air flow rate passing through the surface of the odor sensor is within the range of [X1, X2], and the noise can be reduced at the same time.

[0169] But when the compressor stops running, the noise is at a lower level; at the same time, because the compressor is not working, the air circulation in the refrigerator is slow and the odor diffusion is uneven. The fan needs to run at a higher speed to accelerate the air circulation in the room, making the odor distribution more even and improving the accuracy of odor sensor recognition.

[0170] In another embodiment provided by the present invention, the controller is further configured to:

[0171] When it is detected that the refrigerator door is in an open state, the fan is controlled to stop running.

[0172] When the present embodiment is implemented, the user opens and closes the door, which will affect the airflow in the refrigerator. When the user opens the door, the refrigerator exchanges gas with the outside environment due to the door opening action, and the temperature, humidity and airflow of the refrigerator fluctuate greatly and are difficult to control. Therefore, when the system detects that the user opens the door, it controls the fan to stop running, and the odor sensor works normally. However, the system does not read the output value of the odor sensor at this time to avoid the interference of the external environment on the airflow in the refrigerator, which affects the judgment of the controller, resulting in misjudgment and abnormal fan speed.

[0173] In another embodiment provided by the present invention, the refrigerator further comprises: a heating wire, which is arranged in the refrigerating chamber and close to the odor sensor, and the heating wire is used to heat the air flowing through the odor sensor;

[0174] A temperature sensor is arranged in the refrigerating chamber and close to the odor sensor. The temperature sensor is used to detect the temperature of the airflow flowing through the surface of the odor sensor.

[0175] The controller is also configured to:

[0176] When the odor sensor starts to work, detecting the air flow temperature of the air flow flowing through the surface of the temperature sensor;

[0177] Matching the corresponding operating power in a preset power matching library according to the airflow temperature;

[0178] The heating wire is controlled to operate at the operating power.

[0179] In the specific implementation of this embodiment, the working principle of the metal oxide type odor sensor is that the target gas undergoes an oxidation-reduction reaction with the sensitive material under high temperature (generally above 200°C), causing the material resistance to change, thereby reflecting the gas concentration. Therefore, the odor sensor has its own heating resistor to heat the sensitive material so that the temperature reaches the temperature required for the reaction. Therefore, under the condition of a cold storage room with an average temperature of 4°C, the odor sensor can also work normally, but in terms of sensitivity, it is lower than normal temperature. At the same time, it was found that in a low temperature environment, temperature fluctuations are more likely to cause fluctuations in the response of the odor sensor. Therefore, in a cold storage room environment, it is necessary to control the temperature of the airflow flowing through the surface of the odor sensor to be constant to ensure the accuracy of the odor sensor in sensing the odor concentration.

[0180] Temperature fluctuations will also affect the accuracy of the odor sensor in sensing odors, so the temperature fluctuation of the airflow passing through the surface of the odor sensor needs to be reduced. The temperature fluctuation range of the refrigerator room is T min ≤T≤T max When the compressor is running, the temperature decreases; when the compressor stops running, the temperature slowly increases, and this cycle repeats. Since the compressor makes a lot of noise when it is turned on, it should be turned on as little as possible. At the same time, the compressor refrigeration is for the entire room, so in order to control the temperature fluctuation of the airflow flowing through the surface of the odor sensor, the temperature fluctuation range is controlled to T1≤T≤T max It is easier to keep T1>T min .

[0181] See also Fig.11 , is a structural schematic diagram of a sensor module provided in another embodiment of the present invention; a heating wire 1101 and a temperature sensor 1102 are further provided inside the sensor module 102, the heating wire 1101 is arranged close to the odor sensor, and is used to heat the air flowing through the odor sensor; the temperature sensor 1102 is arranged in the cold storage room and close to the odor sensor, and is used to detect the temperature of the airflow flowing through the surface of the odor sensor.

[0182] When the compressor stops running, the temperature of the refrigerator compartment rises slowly. When it reaches the set threshold value T max When the temperature drops to T, the compressor starts cooling again. minWhen the compressor is turned on and off, the temperature of the refrigerator compartment is in a state of fluctuation. In order to reduce the impact of the temperature when the compressor is running, the temperature of the airflow passing through the odor sensor surface needs to be controlled within T1≤T≤T max The control is performed in the following manner: when the odor sensor fan is running, the temperature sensor starts working to detect the air flow temperature of the air flow passing through the surface of the odor sensor; and the corresponding operating power is matched in a preset power matching library according to the air flow temperature.

[0183] It should be noted that the power matching library may specifically be a power matching table including the corresponding relationship between the temperature of the airflow and the power of the heating wire, see Table 1.

[0184] Table 1, Power matching table of heating wire

[0185]

[0186] When the odor sensor fan stops running, the heating wire stops running regardless of the temperature range.

[0187] Temperature compensation is performed through the heating wire to ensure that the odor sensor operates within an appropriate temperature range and avoid repeated starts and stops of the compressor.

[0188] In another embodiment provided by the present invention, the refrigerator further comprises:

[0189] a dehumidification device, arranged in the refrigerating chamber and close to the odor sensor, wherein the moisture absorption device is used to dehumidify the air flowing through the odor sensor;

[0190] A humidity sensor is disposed in the refrigerating chamber and close to the odor sensor, and is used to detect the humidity of the airflow passing through the dehumidification device;

[0191] The controller is also configured to:

[0192] detecting the current humidity of the airflow passing through the dehumidification device;

[0193] When the current humidity exceeds a preset first humidity threshold, the operating parameters of the fan and the heating wire are switched from current initial parameters to preset parameters;

[0194] Among them, the first humidity threshold is not lower than the maximum value of the surface airflow humidity range suitable for the odor sensor to operate.

[0195] During the specific implementation of this embodiment, since the sensitive materials of the semiconductor sensor usually work at a high temperature higher than 200°C, a variety of light-based ions rather than water molecules are adsorbed on the surface of the semiconductor material in the humid air, which causes the material resistance to change, resulting in the odor sensor to sense the odor inaccurately. Therefore, in order to make the odor sensor sense the odor concentration more accurately, the ambient humidity should be kept at a low level. However, when the user places more fruits and vegetables in the refrigerator, the humidity in the refrigerator will be at a higher level. At the same time, some manufacturers will install humidification technology in the refrigerator to increase the humidity in the refrigerator compartment in order to prevent the fruits and vegetables from drying out. In this case, it is bound to affect the accuracy of the odor sensor. Therefore, it is necessary to control the humidity flowing through the surface of the odor sensor through the microenvironment to ensure the accuracy of the odor sensor in sensing the odor concentration. Through testing, the surface airflow humidity suitable for the refrigerator odor sensor to work is ≤S1.

[0196] The sensitivity of the odor sensor in humid air is lower than that in dry air, so the humidity of the air flowing over the surface of the odor sensor needs to be kept low. However, since food is stored in the refrigerator, especially when there are many fruits and vegetables, the humidity inside the refrigerator is relatively high. Some refrigerator manufacturers have active humidification technology to maintain high humidity in the refrigerator to facilitate freshness, so there is a situation where the humidity in the refrigerator is high. In order to ensure that the odor sensor can accurately identify odors, the humidity of the air flowing over the surface of the odor sensor needs to be controlled. See Fig.11 A dehumidification device 1103 and a humidity sensor 1104 are also provided inside the sensor module 102 .

[0197] The dehumidification device 1103 is arranged in the cold storage room and is arranged near the odor sensor. The dehumidification device is used to dehumidify the air flowing through the odor sensor. The dehumidification device is provided with a hygroscopic fiber, which is loaded with hygroscopic components such as calcium chloride. The fiber has a large contact area with the air and can load a large amount of hygroscopic agent. When air with high humidity flows through, the hygroscopic agent on the surface of the fiber can absorb the moisture in the air, so that the humidity of the air passing through the fiber is reduced. There is a humidity sensor at the rear of the fiber to monitor the humidity of the air after passing through the hygroscopic fiber of the dehumidification device in real time. Due to the effect of the hygroscopic fiber, the humidity of the air passing through is S≤S1, but when the hygroscopic agent is in a high humidity environment for a long time, saturation will occur, resulting in the humidity of the air after passing through the hygroscopic fiber S>S1.

[0198] See also Fig.12 , is a schematic diagram of a control flow of a controller provided by the present invention in a fourth embodiment, wherein the controller specifically performs the following steps:

[0199] Step S1201, detecting the current humidity S of the airflow passing through the dehumidification device t ;

[0200] Step S1202, determine St Is it greater than S1? That is, it is determined that the current humidity exceeds the preset first humidity threshold.

[0201] If not, return to step S1201;

[0202] If yes, execute step S1203;

[0203] Step S1203, the operating parameters of the fan and the heating wire are switched from the current initial parameters to the preset parameters, that is, the fan speed is increased to R3 rpm / min, and the heating wire is controlled to operate at W0 power.

[0204] It should be noted that when the humidity sensor S>S1, the odor sensor still works, but the controller does not read the output value of the odor sensor at this time.

[0205] It should be noted that the first humidity threshold S1 is not lower than the maximum value of the surface airflow humidity range suitable for the odor sensor to work.

[0206] When the air humidity exceeds the maximum value of the surface airflow humidity range suitable for the odor sensor to work, it indicates that the hygroscopic fiber has reached a saturated state. Increasing the air flow rate and the heating rate of the heating wire will blow away the moisture on the hygroscopic fiber and restore its hygroscopic function.

[0207] In another embodiment provided by the present invention, the controller is further configured to:

[0208] After controlling the fan and the heating wire to operate for a preset second time period with the operating parameters, detecting the current humidity of the airflow passing through the dehumidification device again, and calculating the current difference between the first humidity threshold and the current humidity detected again;

[0209] When the current difference is less than the preset humidity return difference, the fan and the heating wire are continuously controlled to run for the second time period with the preset parameters, the current difference is updated with the re-detected current humidity, and the updated current difference is judged until the current difference is not less than the humidity return difference;

[0210] When the current difference is not less than the humidity return difference, the operating parameters of the fan and the heating wire are restored to the initial parameters, and the concentration value of the odor sensor is read, and odor removal control is performed according to the concentration value.

[0211] When this embodiment is implemented, see Fig.12 , the controller further performs the following steps:

[0212] Step S1204: After running for 5 minutes, the current humidity S of the airflow passing through the dehumidification device is detected again. t ;

[0213] Step S1205, calculating the current difference ΔS, which is the difference between the first humidity threshold S1 and the detected current humidity S t difference.

[0214] Step S1206, determining whether the current difference ΔS<S0 holds, that is, determining whether the current difference ΔS is less than the humidity difference S0.

[0215] If yes, return to step S1204;

[0216] If not, execute step S1207;

[0217] Step S1207, controlling the heating wire and the fan to restore initial parameters, reading the concentration value of the odor sensor, and performing odor removal control according to the concentration value.

[0218] That is, when the current difference is not less than the humidity return difference, the heating wire and the fan are controlled to restore the operation mode before the humidity S>S1, and the concentration value of the odor sensor is read to perform odor removal control.

[0219] It should be noted that the odor is divided into two different odor levels according to the concentration value of the odor sensor. For example, the output concentration value of the odor sensor is level A within the preset first concentration range, and level B within the second concentration range. Level A means there is basically no odor, and level B means there is odor, and the odor purification device needs to be turned on for odor purification.

[0220] After the fan and the heating wire are controlled to run for t time with the operating parameters, the humidity sensor senses that the air humidity is still in the state of S>S1-S0. The set humidity hysteresis value S0 can prevent the fluctuation at the critical humidity S1 from causing the fan to be in an alternating state of on and off.

[0221] Compared with the prior art, the refrigerator disclosed in the present invention is equipped with an odor sensor and an airflow sensor for sensing odors in the refrigerator to ensure the normal function of the odor sensor. By obtaining the working condition of the refrigerator to evaluate the impact of the refrigerator refrigeration system on the airflow inside the refrigerator, combined with the monitoring of the gas flow rate in the cold storage room, it is possible to accurately evaluate whether the refrigerator airflow is suitable, and then determine the speed of the fan accordingly, correct the current airflow, and accurately control the airflow velocity flowing through the surface of the odor sensor to ensure the normal detection function of the odor sensor, improve the reliability of the intelligent odor removal function, and enhance the user experience.

[0222] An embodiment of the present invention provides a refrigerator control method, the refrigerator comprising:

[0223] a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber;

[0224] A door, used for opening and closing the storage room;

[0225] an odor sensor, disposed at the return air outlet of the refrigerating chamber, for detecting the concentration of the gas flowing through the return air outlet;

[0226] A refrigeration fan is arranged in the refrigeration chamber and is used to promote the gas in the refrigeration chamber to pass through the evaporator to achieve cooling;

[0227] A fan is arranged in the refrigerating chamber and close to the odor sensor, and the fan is used to control the flow rate of the gas flowing through the return air port;

[0228] An air flow rate sensor is arranged in the refrigerating chamber and close to the odor sensor, and the air flow rate sensor is used to detect the gas flow rate;

[0229] Controller;

[0230] The method comprises:

[0231] Detecting the operating state of the compressor and the operating state of the refrigeration fan to determine the operating condition of the refrigerator;

[0232] detecting a gas flow rate in the refrigerating chamber;

[0233] Matching a corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate;

[0234] The fan is controlled to operate according to the current rotation speed.

[0235] It should be noted that the refrigerator control method provided in the embodiment of the present invention is the same as all the process steps executed by the controller of a refrigerator in the above embodiment, see Figure 8 The working principles and beneficial effects of the two correspond one to one. For the specific workflow diagram, see Figure 9-10 and Fig.12 , so I will not go into details.

[0236] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0237] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber; A door, used for opening and closing the storage chamber; an odor sensor, disposed at the return air outlet of the refrigerating chamber, for detecting the concentration of the gas flowing through the return air outlet; A refrigeration fan is arranged in the refrigeration chamber and is used to promote the gas in the refrigeration chamber to pass through the evaporator to achieve cooling; A fan is arranged in the refrigerating chamber and close to the odor sensor, and the fan is used to control the flow rate of the gas flowing through the return air port; An air flow rate sensor is arranged in the refrigerating chamber and close to the odor sensor, and the air flow rate sensor is used to detect the gas flow rate; The controller is configured as: Detecting the operating status of the compressor and the operating status of the refrigeration fan to determine the operating condition of the refrigerator; detecting a gas flow rate in the refrigerating chamber; Matching a corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate; The fan is controlled to operate according to the current rotation speed.

2. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When it is detected that the compressor and the refrigeration fan are both in operation, determining that the operating condition is a normal condition; When it is detected that the compressor is in a shutdown state, it is determined that the operating condition is a shutdown condition.

3. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the operating condition is a normal condition and the gas flow rate is within a preset first range, matching a first rotation speed as the current rotation speed; When the operating condition is a normal condition and the gas flow rate is within a preset second range, matching the second rotation speed as the current rotation speed; Among them, the first rotational speed is higher than the second rotational speed, the maximum value of the first range is not higher than the minimum value of the air flow speed range suitable for the odor sensor to work, and the minimum value of the second range is not lower than the maximum value of the air flow speed range.

4. The refrigerator according to claim 3, characterized in that: The controller is also configured to: After controlling the fan to run for a preset first time period using the first speed as the current speed, detecting the gas flow rate in the refrigerating chamber again; When the gas flow rate detected again is still within the first range, controlling the fan to run at a preset third speed; After controlling the fan to run for the first time period using the second speed as the current speed, detecting the gas flow rate in the refrigerating chamber again; When the gas flow rate detected again is still within the second range, controlling the fan to run at a preset fourth speed; The third speed is higher than the first speed, and the fourth speed is lower than the second speed.

5. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the operating condition is a shutdown condition, obtaining a current rotation speed of the fan; When the current rotation speed is not lower than a preset rotation speed threshold, keeping the fan running at the current rotation speed; When the current rotation speed is lower than the rotation speed threshold, controlling the fan to run at a preset fifth rotation speed; Wherein, the fifth speed is not lower than the speed threshold.

6. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When it is detected that the refrigerator door is in an open state, the fan is controlled to stop running.

7. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: A heating wire is arranged in the refrigerating chamber and close to the odor sensor, and the heating wire is used to heat the air flowing through the odor sensor; a temperature sensor, disposed in the refrigerating chamber and close to the odor sensor, the temperature sensor being used to detect the temperature of the airflow flowing through the surface of the odor sensor; The controller is also configured to: When the odor sensor starts to work, detecting the air flow temperature of the air flow flowing through the surface of the temperature sensor; Matching the corresponding operating power in a preset power matching library according to the airflow temperature; The heating wire is controlled to operate at the operating power.

8. The refrigerator according to claim 7, characterized in that: The refrigerator further comprises: a dehumidification device, arranged in the refrigerating chamber and close to the odor sensor, wherein the moisture absorption device is used to dehumidify the air flowing through the odor sensor; A humidity sensor is disposed in the refrigerating chamber and close to the odor sensor, and is used to detect the humidity of the airflow passing through the dehumidification device; The controller is also configured to: detecting the current humidity of the airflow passing through the dehumidification device; When the current humidity exceeds a preset first humidity threshold, the operating parameters of the fan and the heating wire are switched from current initial parameters to preset parameters; Among them, the first humidity threshold is not lower than the maximum value of the surface airflow humidity range suitable for the odor sensor to operate.

9. The refrigerator according to claim 8, characterized in that: The controller is also configured to: After controlling the fan and the heating wire to operate for a preset second time period with the operating parameters, detecting the current humidity of the airflow passing through the dehumidification device again, and calculating the current difference between the first humidity threshold and the current humidity detected again; When the current difference is less than the preset humidity return difference, the fan and the heating wire are continuously controlled to run for the second time period with the preset parameters, the current difference is updated with the re-detected current humidity, and the updated current difference is judged until the current difference is not less than the humidity return difference; When the current difference is not less than the humidity return difference, the operating parameters of the fan and the heating wire are restored to the initial parameters, and the concentration value of the odor sensor is read, and odor removal control is performed according to the concentration value.

10. A refrigerator control method, characterized in that: The refrigerator comprises: a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber; A door, used for opening and closing the storage room; an odor sensor, disposed at the return air outlet of the refrigerating chamber, for detecting the concentration of the gas flowing through the return air outlet; A refrigeration fan is arranged in the refrigeration chamber and is used to promote the gas in the refrigeration chamber to pass through the evaporator to achieve cooling; A fan is arranged in the refrigerating chamber and close to the odor sensor, and the fan is used to control the flow rate of the gas flowing through the return air port; An air flow rate sensor is arranged in the refrigerating chamber and close to the odor sensor, and the air flow rate sensor is used to detect the gas flow rate; Controller; The method comprises: Detecting the operating state of the compressor and the operating state of the refrigeration fan to determine the operating condition of the refrigerator; detecting a gas flow rate in the refrigerating chamber; Matching a corresponding current speed in a preset speed control library according to the operating condition and the gas flow rate; The fan is controlled to operate according to the current rotation speed.

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