Refrigerator and air door reset control method thereof

Abstract

The invention discloses a refrigerator and an air door reset control method thereof, and the refrigerator comprises a refrigerator body, at least one storage chamber is formed in the refrigerator body; the refrigerating system is formed by circulating a pipeline formed by connecting a compressor, a condenser, a capillary tube and an evaporator through pipelines, and is used for cooling the storage chamber; the air door is arranged in the refrigeration air duct of the storage chamber and used for controlling the air outlet speed of the refrigeration air duct; the temperature sensor is arranged in the storage chamber and used for detecting the current temperature of the storage chamber; the controller is configured to obtain the current temperature of the storage chamber in response to a received air door reset signal; the current position of the air door is determined according to the current temperature, the preset air door starting temperature and the preset air door shutdown temperature; and the air door is controlled to complete the reset process according to the current position. Stable reset operation of the air door can be guaranteed, abnormal noise of the air door is reduced, and a driving structure or a mechanical limiting structure of the refrigerator air door is prevented from being damaged.

Description

Technical Field

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

[0002] At present, refrigerators and other refrigeration equipment are developing towards the trend of multi-temperature zones and fine storage. Multi-temperature zones require refrigerators to be designed with multiple refrigeration systems. Due to factors such as complex structure and high cost, multi-systems have not been widely used in cold products. Currently, the most common refrigerators in the refrigerator industry are three-system refrigerators. In order to meet the requirements of multiple temperature zones, the industry mostly uses one refrigeration system to control multiple temperature zones. The core control method is to design dampers in the air duct to control the temperature of different temperature zones by opening and closing the dampers.

[0003] The opening and closing of the damper is controlled by the damper drive signal sent by the main control board, and the main control board does not have the function of identifying the position of the damper door plate. In order to ensure the accuracy of the initial position of the damper, the damper will be reset once every fixed period of time to accurately control the damper position. However, the main control board does not have the function of identifying the position of the damper door plate. The position of the damper door plate is uncertain at the beginning of the damper reset, so the default initial state of the damper is closed. The main control board provides the damper with a reset signal of fully opening and then fully closing to ensure that the damper returns to its initial position while running at full stroke. However, if the damper is not in a closed state at the beginning of the reset, that is, when the damper door plate is a certain distance from the initial position, the damper receives the reset signal and first opens the full stroke. After the damper is fully opened, there will be an excess opening control signal to make the stepper motor continue to run, and the damper has been fully opened. The excess driving force of the stepper motor conflicts with the mechanical limit structure, and the damper reset operation process is not stable, which will cause the damper to produce abnormal noise of jamming, and it is easy to damage the driving structure or mechanical limit structure of the refrigerator damper. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a refrigerator and a damper reset control method thereof, which can ensure the stable operation of damper reset, reduce abnormal damper noise, and avoid damage to the driving structure or mechanical limit structure of the refrigerator damper.

[0005] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0006] a box body, in which at least one storage chamber is formed;

[0007] A refrigeration system, comprising a pipe loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipes, for cooling the storage room;

[0008] An air door is arranged in the refrigeration air duct of the storage chamber and is used to control the air outlet speed of the refrigeration air duct;

[0009] A temperature sensor is provided in the storage chamber and is used to detect the current temperature of the storage chamber;

[0010] A controller, the controller being configured to:

[0011] In response to the received damper reset signal, obtaining the current temperature of the storage chamber;

[0012] Determining the current position of the damper according to the current temperature, a preset damper start temperature, and a preset damper shutoff temperature;

[0013] The damper is controlled according to the current position to complete the resetting process.

[0014] Preferably, the controller is further configured to:

[0015] When the current temperature is lower than the damper closing temperature, determining the current position as a door closing position;

[0016] When the current temperature is higher than the damper opening temperature, the current position is determined to be an open position.

[0017] As a preferred solution, the controller is further configured as follows:

[0018] When the current temperature is not lower than the damper shutdown temperature and not higher than the damper startup temperature, the damper reset control process is delayed, and after a preset first period of time, the current temperature of the storage chamber is reacquired until the acquired current temperature is lower than the damper shutdown temperature or higher than the damper startup temperature.

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

[0020] After determining the current position, start calculating the waiting time;

[0021] When the waiting time is not less than the preset second time period, the damper reset control is started.

[0022] Preferably, the controller is further configured to:

[0023] When the current position is at the closed position, the damper is controlled to move from the closed position to the open position according to the full-stroke motion instruction, and then the damper is moved from the open position to the closed position to complete the damper reset control.

[0024] As a preferred solution, the controller is further configured as follows:

[0025] When the current position is at the door-opening position, the damper is controlled to move from the door-opening position to the door-closing position, and then from the door-closing position to the door-opening position, and finally from the door-opening position to the door-closing position to complete the damper reset control according to the full-stroke motion instruction.

[0026] Furthermore, the refrigerator further comprises:

[0027] A damper driving device, used for driving the damper to move;

[0028] The full-stroke motion instruction includes the number of motion steps M of the damper drive device;

[0029] Among them, the movement step number M=N+K, N is the number of steps that the damper driving device drives the damper to complete the full stroke of the movement from the closed position to the open position, and K is a preset additional step number.

[0030] Preferably, the controller is further configured to:

[0031] After the refrigerator starts to operate, calculating the reset interval duration;

[0032] When the reset interval duration reaches the preset reset control duration, the damper reset signal is generated and the reset interval duration is calculated again.

[0033] An embodiment of the present invention further provides a refrigerator damper reset control method, the refrigerator comprising:

[0034] a box body, in which at least one storage chamber is formed;

[0035] A refrigeration system, comprising a pipe loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipes, for cooling the storage room;

[0036] An air door is arranged in the refrigeration air duct of the storage chamber and is used to control the air outlet speed of the refrigeration air duct;

[0037] A temperature sensor is provided in the storage chamber and is used to detect the current temperature of the storage chamber;

[0038] Controller;

[0039] The method comprises:

[0040] In response to the received damper reset signal, obtaining the current temperature of the storage chamber;

[0041] Determining the current position of the damper according to the current temperature, a preset damper start temperature, and a preset damper shutoff temperature;

[0042] The damper is controlled according to the current position to complete the resetting process.

[0043] Furthermore, the method further comprises:

[0044] When the current temperature is lower than the damper closing temperature, determining the current position as a door closing position;

[0045] When the current temperature is higher than the damper opening temperature, the current position is determined to be the door opening position.

[0046] Compared with the prior art, the refrigerator and its damper reset control method disclosed in the present invention include: a box body, in which at least one storage room is formed; a refrigeration system, which is composed of a pipeline cycle composed of a compressor, a condenser, a capillary tube and an evaporator connected by a pipeline, and is used to cool the storage room; a damper, which is arranged in the refrigeration air duct of the storage room, and is used to control the air outlet speed of the refrigeration air duct; a temperature sensor, which is arranged in the storage room, and is used to detect the current temperature of the storage room; a controller, which is configured to: obtain the current temperature of the storage room in response to the received damper reset signal; determine the current position of the damper according to the current temperature, the preset damper start temperature and the preset damper shutdown temperature; and control the damper according to the current position to complete the reset process. The present application can ensure the stable operation of the damper reset, reduce the abnormal noise of the damper, and avoid damage to the driving structure or mechanical limit structure of the refrigerator damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0049] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0050] Figure 4 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

[0051] Figure 5 is a schematic diagram of the connection between the controller and other hardware devices provided by an embodiment of the present invention;

[0052] Figure 6 is a schematic diagram of a flow chart of work performed by a controller provided in an embodiment of the present invention;

[0053] Figure 7 is a flowchart of specific execution steps of the controller provided in an embodiment of the present invention;

[0054] Figure 8is another flowchart of specific execution steps of the controller provided in an embodiment of the present invention;

[0055] Fig. 9 is another flowchart of specific execution steps of the controller provided in an embodiment of the present invention;

[0056] Fig.10 It is another flowchart diagram of specific execution steps of the controller provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] See also Figure 1 , Figure 11 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.

[0062] 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 started in a drawer-like manner to realize drawer-like storage. The refrigerator door is provided with a display screen, which is used to display prompt information and receive user touch operations.

[0063] See also Figure 3, is a schematic diagram of the structure of the refrigeration system in the refrigerator provided by an embodiment of the present invention, the refrigeration system 10 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. Among them, 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 to 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.

[0064] The refrigerator provided by the embodiment of the present invention includes:

[0065] a box body, in which at least one storage chamber is formed;

[0066] A refrigeration system, comprising a pipe loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipes, for cooling the storage room;

[0067] An air door is arranged in the refrigeration air duct of the storage chamber and is used to control the air outlet speed of the refrigeration air duct;

[0068] A temperature sensor is provided in the storage chamber and is used to detect the current temperature of the storage chamber;

[0069] Controller.

[0070] When this embodiment is implemented, see Figure 4 , is a schematic diagram of the structure of a refrigerator provided in an embodiment of the present invention; at least one storage chamber 5 is arranged inside the body 0 of the refrigerator 100, and the storage chamber is used to store food. The storage chamber 5 specifically includes a freezing chamber, a refrigerating chamber and a variable temperature chamber to provide different storage conditions for storing different items and foods.

[0071] The refrigeration system 10 inside the refrigerator 100 is used to provide coldness for the storage room and cool down the storage room 5. The refrigeration system 10 is composed of a pipeline loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipelines.

[0072] The refrigerator lowers the temperature by circulating the refrigerant in the refrigeration system. 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 this cycle is discharged through the air outlet on the refrigeration air duct provided in the storage room. The refrigerator body is formed with at least one storage room, and the storage room includes a freezer and a refrigerator in the figure; therefore, after passing through the compressor and the condenser (not shown in the figure), the refrigeration cycle is divided into two paths through the solenoid valve, which are used to cool the freezer and the refrigerator respectively. After passing through the capillary throttling, the cold is transported to the refrigerator and the freezer through their respective evaporators and corresponding refrigeration fans, and the refrigeration branches of the freezer and the refrigerator are merged through the solenoid valve and transported back to the compressor.

[0073] Specifically, the storage room of the refrigerator generates cold energy through the evaporator, which is used to cool the storage room. Specifically, the evaporator accelerates the flow rate of gas on the evaporator through the configured fan, and then transfers the cold energy on the evaporator to the storage room, so as to cool the storage room.

[0074] A refrigerator with multiple storage rooms, such as a freezer and a refrigerator, may share the same refrigeration system, evaporator and fan. The cooling capacity required by the freezer and refrigerator is obviously different. However, when the temperature of the refrigerator is too low, the evaporator or fan cannot be adjusted directly to avoid affecting the operation of the freezer. Therefore, it is necessary to design a damper to control the air outlet speed of the refrigeration air duct of the evaporator cooling output to different storage rooms, control the cooling capacity delivery rate, and then control the temperature of different storage rooms.

[0075] The air door 6 of the refrigerator is arranged in the refrigeration air duct of the storage chamber, and is used to control the air outlet speed of the refrigeration air duct.

[0076] The refrigerator is also equipped with a temperature sensor 7, which is arranged in the storage chamber 5 and is used to detect the current temperature of the storage chamber.

[0077] The refrigerator further comprises a controller 8, which is used to execute the damper reset control process. Figure 5 , is a schematic diagram of the connection between the controller and other hardware devices provided in an embodiment of the present invention. When the damper reset control is performed, the controller 8 is connected to the temperature sensor 7 and the damper 6 respectively.

[0078] See also Figure 6, is a flowchart of the work performed by the controller provided in an embodiment of the present invention. When performing specific control, the controller performs the following steps:

[0079] Step S1, in response to the received damper reset signal, obtaining the current temperature of the storage chamber;

[0080] Step S2, determining the current position of the damper according to the current temperature, the preset damper startup temperature and the preset damper shutdown temperature;

[0081] Step S3, controlling the damper to complete a resetting process according to the current position.

[0082] In specific implementation, when receiving the damper reset signal, the damper reset signal can be actively detected by the controller when the operating state of the refrigerator meets the reset condition, and the damper reset signal is automatically generated to start the damper control process. Or the damper reset signal generated by the user trigger is received, and the damper control process is passively started.

[0083] After the damper control is started, the current temperature of the storage chamber is obtained. The current temperature of the storage chamber can determine the current working state of the storage chamber, and then determine the position of the damper accordingly.

[0084] When the temperature of the storage room is low, the damper of the storage room will be closed, and the cooling capacity output by the air duct will be stopped. When the temperature of the storage room is too high, the damper of the storage room will be opened, and the cooling capacity output by the air duct will be used to cool the storage room. When the temperature of the storage room is higher than the damper start-up temperature, the controller will open the damper to the maximum position to control the damper to deliver the maximum cooling capacity and quickly cool the storage room. When the temperature of the storage room is lower than the damper start-up temperature, the controller will close the damper to control the damper to close the cooling capacity to the storage room to prevent the storage room from being too cold.

[0085] According to this working characteristic of the damper, the current position of the damper can be determined according to the current temperature of the storage chamber, the preset damper start temperature and the preset damper shut-off temperature.

[0086] After determining the current position of the damper, a damper reset signal can be output accordingly to control the damper to complete the reset process.

[0087] The current position of the damper is determined by the temperature of the storage room. The damper reset control process based on the current position can avoid the situation where the damper position is not fixed. When the damper reset control is performed, the redundant control signal drives the damper to continue to operate, while the damper is fully opened / closed and reaches the mechanical limit position of the damper. The redundant driving force conflicts with the mechanical limit structure, causing the damper to generate abnormal noise until the stepper motor completes the operation of the damper full opening signal. The conflict with the mechanical limit structure may also cause damage to the damper or the mechanical limit structure.

[0088] In another embodiment provided by the present invention, the controller is further configured to:

[0089] When the current temperature is lower than the damper closing temperature, determining the current position as a door closing position;

[0090] When the current temperature is higher than the damper opening temperature, the current position is determined to be an open position.

[0091] When this embodiment is implemented, see Figure 7 , is a flowchart of specific execution steps of the controller provided in an embodiment of the present invention, and the controller is used to perform the following steps:

[0092] Step S701, obtaining the current temperature T of the storage room. That is, the temperature of the storage room is detected by a temperature sensor arranged in the storage room.

[0093] Step S702, determine whether the current temperature T is less than T min That is, whether the current temperature is lower than the damper shut-down temperature T min .

[0094] If yes, execute step S703;

[0095] If not, execute step S705;

[0096] Step S703, determine that the current position is the door-closed position. The normal temperature range of the storage room is [T min , T max ], the temperature of the storage room is lower than the air door closing temperature T min When the air door is fully closed, the controller controls the air door to be fully closed.

[0097] Step S704, controlling the damper according to the door closing position to complete the resetting process.

[0098] Step S705: determine whether the current temperature T>T max That is, whether the current temperature is higher than the damper start-up temperature T max .

[0099] If yes, execute step S706;

[0100] If not, perform other control processes;

[0101] Step S706, determine that the current position is the door opening position. The normal temperature range of the storage room is [T min , T max ], the temperature of the storage room is higher than the damper opening temperature T max , the controller controls the damper to fully open, and the damper is in the open position.

[0102] Step S707, controlling the damper according to the door opening position to complete the resetting process.

[0103] It should be noted that, in the embodiment provided Figure 7 In the embodiment, step S702 is executed first, and when the result of step S702 is determined to be negative, step S705 is executed. In other embodiments, step S702 and step S705 may be executed in other orders, for example, step S705 is executed first, and when the result of step S705 is determined to be negative, step S702 is executed again, or step S702 and step S705 are executed simultaneously without any order between the two.

[0104] It should be noted that in this embodiment, only the current positions of the two dampers are matched according to the two temperature ranges of the refrigerating chamber. In other embodiments, the damper position can be matched according to the specific control scheme of the controller for the damper opening, that is, different damper openings corresponding to different temperatures, to achieve a more sophisticated damper position determination scheme.

[0105] When the temperature in the storage room is too high or too low, the controller can accurately determine the position of the damper based on the control characteristics of the damper, and then complete the reset control process according to the determined position.

[0106] In another embodiment provided by the present invention, the controller is further configured to:

[0107] When the current temperature is not lower than the damper shutdown temperature and not higher than the damper startup temperature, the damper reset control process is delayed, and after a preset first period of time, the current temperature of the storage chamber is reacquired until the acquired current temperature is lower than the damper shutdown temperature or higher than the damper startup temperature.

[0108] When this embodiment is implemented, see Figure 7 In step S705, it is determined that the current temperature T>T max If not, perform the following steps:

[0109] Step S708, extending the damper reset control process by a duration of t1, and returning to step S701.

[0110] That is, when the current temperature T obtained satisfies T min ≤T≤T max When the damper position cannot be determined, the damper reset time is delayed, the current temperature is acquired again, and the current position is re-determined based on the current temperature until the current temperature is lower than the damper shutdown temperature or higher than the damper startup temperature to determine the current position.

[0111] When the temperature in the storage room is between the damper shutdown temperature and the damper startup temperature, the damper works normally and will match the corresponding damper opening according to the current temperature, making it difficult to determine the damper position. The reset time is delayed until the damper position is accurately detected, and then reset control is performed to ensure the accuracy of the reset control.

[0112] In another embodiment provided by the present invention, the controller is further configured to:

[0113] After determining the current position, start calculating the waiting time;

[0114] When the waiting time is not less than the preset second time period, the damper reset control is started.

[0115] When this embodiment is implemented, see Figure 8 , is another flowchart of specific execution steps of the controller provided in an embodiment of the present invention. When performing specific control, the controller performs the following steps:

[0116] Step S801, in response to the received damper reset signal, obtaining the current temperature of the storage chamber;

[0117] Step S802, determining the current position of the damper according to the current temperature, the preset damper startup temperature and the preset damper shutdown temperature;

[0118] Step S803, calculating the waiting time;

[0119] Step S804, determining whether the waiting time is not less than the second time;

[0120] If yes, execute step S805;

[0121] If not, return to step S803;

[0122] Step S805, starting the damper reset control according to the current position.

[0123] When the temperature in the storage room just reaches the control temperature corresponding to the current position, the current position can be matched. However, the controller has not yet completed the control process of the damper, and the damper is not at the corresponding position. The actual position of the damper cannot correspond to the determined current position. To avoid this problem, after obtaining the current position, it is still necessary to wait for the preset second time to ensure that the actual position of the damper is the same as the matching position.

[0124] In another embodiment provided by the present invention, the controller is further configured to:

[0125] When the current position is at the closed position, the damper is controlled to move from the closed position to the open position according to the full-stroke motion instruction, and then the damper is moved from the open position to the closed position to complete the damper reset control.

[0126] When this embodiment is implemented, see Fig. 9 , is another flowchart of specific execution steps of the controller provided in an embodiment of the present invention, and the controller is used to execute the following steps:

[0127] Step S901, obtaining the current temperature T of the storage room. That is, the temperature of the storage room is detected by a temperature sensor arranged in the storage room.

[0128] Step S902, determine whether the current temperature T is less than T min That is, whether the current temperature is lower than the damper shut-down temperature T min .

[0129] If yes, execute step S903;

[0130] If not, perform other control processes;

[0131] Step S903, determine that the current position is the door-closed position. The normal temperature range of the storage room is [T min , T max ], the temperature of the storage room is lower than the air door closing temperature T min When the air door is fully closed, the controller controls the air door to be fully closed.

[0132] Step S904, controlling the damper to move from a closed position to an open position;

[0133] Step S905, controlling the damper to move from the open position to the closed position, completing damper reset control.

[0134] During the control process, the damper movement is controlled according to the full-stroke movement instruction, so that the damper can be controlled to completely complete the movement process from the open position to the closed position.

[0135] When the damper completes the resetting process according to the closed position control, the resetting process is divided into two parts, the first part is that the damper is fully opened, and the second part is that the damper is fully closed. The damper is guaranteed to operate reliably through the resetting control, and the damper is in the closed state by default after resetting.

[0136] In another embodiment provided by the present invention, the controller is further configured to:

[0137] When the current position is at the door-opening position, the damper is controlled to move from the door-opening position to the door-closing position, and then from the door-closing position to the door-opening position, and finally from the door-opening position to the door-closing position to complete the damper reset control according to the full-stroke motion instruction.

[0138] When this embodiment is implemented, Fig. 9 In step S902, it is determined that the current temperature T is less than T min If not, perform the following steps:

[0139] Step S906, determine whether the current temperature T>T max That is, whether the current temperature is higher than the damper start-up temperature T max .

[0140] If yes, execute step S907;

[0141] If not, perform other control processes;

[0142] Step S907, determine that the current position is the door opening position. The normal temperature range of the storage room is [T min , T max ], the temperature of the storage room is higher than the damper opening temperature T max , the controller controls the damper to fully open, and the damper is in the open position.

[0143] It should be noted that, in the embodiment provided Fig. 9 In the embodiment, step S902 is executed first, and when the result of step S902 is determined to be negative, step S706 is executed. In other embodiments, step S902 and step S906 may be executed in other orders, for example, step S906 is executed first, and when the result of step S906 is determined to be negative, step S902 is executed again, or step S902 and step S906 are executed simultaneously without any order between the two.

[0144] Step S908, controlling the damper to move from an open position to a closed position;

[0145] Step S909, controlling the damper to move from the closed position to the open position;

[0146] Step S910, controlling the damper to move from the open position to the closed position, completing damper reset control.

[0147] During the control process, the damper movement is controlled according to the full-stroke movement instruction, so that the damper can be controlled to completely complete the movement process from the open position to the closed position.

[0148] When the damper completes the resetting process according to the door opening position control, the resetting process is divided into three parts. The first part is that the damper is completely closed, the second part is that the damper is fully opened, and the third part is that the damper is fully closed. The damper is guaranteed to operate reliably through the resetting control, and the damper is in the closed state by default after resetting.

[0149] In another embodiment provided by the present invention, the refrigerator comprises:

[0150] A damper driving device, used for driving the damper to move;

[0151] The full-stroke motion instruction includes the number of motion steps M of the damper drive device;

[0152] Among them, the movement step number M=N+K, N is the number of steps that the damper driving device drives the damper to complete the full stroke of the movement from the closed position to the open position, and K is a preset additional step number.

[0153] In the specific implementation of this embodiment, the damper of the refrigerator is further provided with a damper driving device 9, and the damper driving device is used to drive the damper to move.

[0154] See also Figure 5 The controller is also connected to the damper drive device to control the movement of the damper drive device and control the damper reset.

[0155] The damper driving device may specifically adopt a stepping motor to drive the damper to move.

[0156] The damper driving device needs N steps to drive the damper to complete a full stroke from a closed position to an open position.

[0157] The number of movement steps M=N+K of the damper driving device controlled in the full-stroke motion instruction, where K is a preset additional number of steps, ensures that the damper can switch from the open position to the closed position when completing the full-stroke motion in sequence, thereby avoiding the damper stopping at a midway position due to insufficient driving steps.

[0158] By controlling the additional step number and setting the additional step number to a smaller value, the noise generated by the damper and the conflict between the damper and the limit device can be reduced.

[0159] In another embodiment provided by the present invention, the controller is further configured to:

[0160] After the refrigerator starts to operate, calculating the reset interval duration;

[0161] When the reset interval duration reaches the preset reset control duration, the damper reset signal is generated and the reset interval duration timing is restarted.

[0162] When this embodiment is implemented, see Fig.10 , is another flowchart of specific execution steps of the controller provided in an embodiment of the present invention. The controller specifically executes the following steps:

[0163] Step S1001, the refrigerator starts running;

[0164] Step S1002, calculating the reset interval duration t';

[0165] Step S1003, determine whether t'<t2 is established;

[0166] If not, execute step S1004;

[0167] If yes, return to step S1002;

[0168] Step S1004, generating the damper reset signal;

[0169] Step S1005, clear the reset interval time t' and return to step S1002.

[0170] During the specific implementation of this embodiment, the controller actively detects the operation time of the refrigerator, and controls the refrigerator to periodically reset the damper at intervals of the reset control time length, so as to ensure that the damper position is normal.

[0171] An embodiment of the present invention provides a refrigerator damper reset control method, the refrigerator comprising:

[0172] a box body, in which at least one storage chamber is formed;

[0173] A refrigeration system, comprising a pipe loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipes, for cooling the storage room;

[0174] An air door is arranged in the refrigeration air duct of the storage chamber and is used to control the air outlet speed of the refrigeration air duct;

[0175] A temperature sensor is provided in the storage chamber and is used to detect the current temperature of the storage chamber;

[0176] Controller;

[0177] The method comprises:

[0178] In response to the received damper reset signal, obtaining the current temperature of the storage chamber;

[0179] Determining the current position of the damper according to the current temperature, a preset damper start temperature, and a preset damper shutoff temperature;

[0180] The damper is controlled according to the current position to complete the resetting process.

[0181] It should be noted that the refrigerator damper reset 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 6 The working principles and beneficial effects of the two correspond one to one. For the specific workflow diagram, see Figure 7 to Figure 10 , so I will not go into details.

[0182] 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.

[0183] 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; A refrigeration system, comprising a pipe loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipes, for cooling the storage room; An air door is arranged in the refrigeration air duct of the storage chamber and is used to control the air outlet speed of the refrigeration air duct; A temperature sensor is provided in the storage chamber and is used to detect the current temperature of the storage chamber; A controller, the controller being configured to: In response to the received damper reset signal, obtaining the current temperature of the storage chamber; Determining the current position of the damper according to the current temperature, a preset damper start temperature, and a preset damper shutoff temperature; The damper is controlled according to the current position to complete the resetting process.

2. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the current temperature is lower than the damper closing temperature, determining the current position as a door closing position; When the current temperature is higher than the damper opening temperature, the current position is determined to be an open position.

3. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the current temperature is not lower than the damper shutdown temperature and not higher than the damper startup temperature, the damper reset control process is delayed, and after a preset first period of time, the current temperature of the storage chamber is reacquired until the acquired current temperature is lower than the damper shutdown temperature or higher than the damper startup temperature.

4. The refrigerator according to claim 1, characterized in that: The controller is also configured to: After determining the current position, start calculating the waiting time; When the waiting time is not less than the preset second time period, the damper reset control is started.

5. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the current position is at the closed position, the damper is controlled to move from the closed position to the open position according to the full-stroke motion instruction, and then the damper is moved from the open position to the closed position to complete the damper reset control.

6. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the current position is at the door-opening position, the damper is controlled to move from the door-opening position to the door-closing position, and then from the door-closing position to the door-opening position, and finally from the door-opening position to the door-closing position to complete the damper reset control according to the full-stroke motion instruction.

7. The refrigerator according to claim 5 or 6, characterized in that: The refrigerator further comprises: A damper driving device, used for driving the damper to move; The full-stroke motion instruction includes the number of motion steps M of the damper drive device; Among them, the movement step number M=N+K, N is the number of steps that the damper driving device drives the damper to complete the full stroke of the movement from the closed position to the open position, and K is a preset additional step number.

8. The refrigerator according to claim 1, characterized in that The controller is also configured to: After the refrigerator starts to operate, calculating the reset interval duration; When the reset interval duration reaches the preset reset control duration, the damper reset signal is generated and the reset interval duration is calculated again.

9. A refrigerator damper reset control method, characterized in that: The refrigerator comprises: a box body, in which at least one storage chamber is formed; A refrigeration system, comprising a pipe loop consisting of a compressor, a condenser, a capillary tube and an evaporator connected by pipes, for cooling the storage room; An air door is arranged in the refrigeration air duct of the storage chamber and is used to control the air outlet speed of the refrigeration air duct; A temperature sensor is provided in the storage chamber and is used to detect the current temperature of the storage chamber; Controller; The method comprises: In response to the received damper reset signal, obtaining the current temperature of the storage chamber; Determining the current position of the damper according to the current temperature, a preset damper start temperature, and a preset damper shutoff temperature; The damper is controlled according to the current position to complete the resetting process.

10. The refrigerator damper reset control method according to claim 9, characterized in that: The method further comprises: When the current temperature is lower than the damper closing temperature, determining the current position as a door closing position; When the current temperature is higher than the damper opening temperature, the current position is determined to be an open position.

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