Refrigerator door closing pressure relief control system and method

Abstract

The invention provides a refrigerator door closing pressure relief control system and method.The system comprises a condensation fan, a drainage pipe, a switch sensor and a controller, the condensation fan is arranged in a compressor cabin, and the drainage pipe communicates with the interior and the exterior of the cabin; one end of the drain pipe is arranged on the air inlet side of the condensate fan, and the other end extends out of the box body to form an airflow channel; the switch sensor is arranged on the door body; the controller obtains a first detection result, the first detection result is a first result that the switch sensor detects the state of the door body, if the first detection result is closing, an instruction is sent to the condensation fan so as to control the condensation fan to operate at a first preset rotating speed, airflow is sucked out through the airflow channel, and the first preset rotating speed is a rotating speed larger than a rotating speed threshold value; the airflow is brought in when the door body is closed. The condensate fan is started when the refrigerator is closed, airflow brought into a room by the door body is sucked out of the refrigerator through the drainage pipe, air pressure inside and outside the refrigerator can be balanced, and the problem that the food fresh-keeping effect is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigerator door closing pressure relief control system and method. Background Art

[0002] Refrigerators are refrigeration equipment used to store food at low temperatures. They extend the shelf life of food by controlling temperature and humidity. Among them, multi-door air-cooled refrigerators use multiple independent temperature zones and achieve uniform distribution of cold energy based on the air duct circulation system to meet users' needs for classified storage of food, energy saving and silence, and no need for manual defrosting.

[0003] In a double-door refrigerator, if one door is closed and the other door is opened and then closed, the rapid closing of the door will cause outside air to rush into the box, causing a sudden increase in air pressure inside the box. The originally closed door may be instantly bounced open due to the internal pressure difference, and may not close tightly.

[0004] Due to the change in pressure inside the box when the door is closed, the impact of airflow will cause the closed door to passively bounce open, forming a half-closed state at a small angle, which will lead to cold air leakage and increased energy consumption, resulting in poor food preservation effect. Summary of the invention

[0005] The present application provides a refrigerator door closing pressure relief control system and method to solve the problem of poor food preservation effect.

[0006] In a first aspect, the present application provides a refrigerator door closing pressure relief control system, which is applied to a refrigerator, wherein the refrigerator is provided with a box body, a door body, a compartment, and a compressor compartment, including:

[0007] A condensing fan is arranged in the compressor compartment;

[0008] A drain pipe is used to connect the inside and outside of the compartment; one end of the drain pipe is arranged on the air inlet side of the condensing fan, and the other end of the drain pipe extends to the outside of the box to form an air flow channel;

[0009] A switch sensor is arranged on the door body;

[0010] The controller is configured as:

[0011] Acquire a first detection result, where the first detection result is a first result of the switch sensor detecting the state of the door body;

[0012] If the first detection result is closed, a command is sent to the condensing fan to control the condensing fan to operate at a first preset speed and to suck the air out through the airflow channel. The first preset speed is a speed greater than a speed threshold, and the airflow is the airflow brought in when the door body is closed.

[0013] In some feasible embodiments, the controller is configured to:

[0014] After the condensing fan runs at a first preset speed, a second detection result is obtained, where the second detection result is a second result of the switch sensor detecting the state of the door body;

[0015] If the second detection result is open, sending a command to the condensing fan to control the condensing fan to stop running;

[0016] If the second detection result is off, obtaining a pressure relief time, the pressure relief time being the time during which the condensing fan runs at a first preset speed;

[0017] If the pressure relief time is greater than or equal to the preset pressure relief time, a command is sent to the condensing fan to control the condensing fan to operate at a speed threshold.

[0018] In some feasible embodiments, a valve is provided at one end of the drain pipe away from the condensing fan;

[0019] The controller is also configured to:

[0020] Obtaining the rotation speed of the condensing fan;

[0021] If the rotation speed of the condensing fan is a rotation speed threshold, a command is sent to the valve to control the valve to close the air flow channel.

[0022] In some feasible embodiments, the number of the compartments is multiple, and the drain pipe includes multiple branch pipes, the branch pipes correspond to the compartments and are connected to the air inlet side of the condensing fan;

[0023] The controller is also configured to:

[0024] Obtaining a third detection result, where the third detection result is a third result of the switch sensor detecting the state of the door body;

[0025] If the third detection result is closed, matching the door body based on the third result;

[0026] Based on the door body matching the compartment, the branch pipeline corresponding to the compartment is marked, and an instruction is sent to the branch pipeline to control the conduction of the branch pipeline.

[0027] In some feasible embodiments, the controller is further configured to:

[0028] Presetting predefined rules, wherein the predefined rules at least include the functional type of the compartment, the size of the door body, and the air pressure difference within the compartment;

[0029] When a plurality of the door bodies are closed at the same time, determining the pressure relief priorities corresponding to the door bodies based on predefined rules;

[0030] According to the pressure relief priority, the condensing fan is controlled to suck out the airflow brought in when each door is closed through the air flow channel.

[0031] In some feasible embodiments, an air pressure sensor is further included, and the air pressure sensor is used to monitor the air pressure difference between the inside and outside of the compartment;

[0032] The controller is also configured to:

[0033] obtaining the air pressure difference;

[0034] If the air pressure difference is greater than or equal to the air pressure difference threshold, sending a command to the condensing fan to control the condensing fan to run at a first preset speed;

[0035] If the air pressure difference is less than the air pressure difference threshold, a command is sent to the condensing fan to control the condensing fan to operate at a speed of a speed threshold.

[0036] In some feasible embodiments, the cross-sectional area of ​​one end of the drain pipe disposed on the air inlet side of the condensing fan is greater than the cross-sectional area of ​​one end of the drain pipe extending to the outside of the box;

[0037] A resistance optimization component is arranged in the air flow channel of the drain pipe. The resistance optimization component includes a flow guide element. The flow guide element is a spiral flow guide plate. The spiral flow guide plate is arranged on the inner wall of the drain pipe.

[0038] In some feasible embodiments, an environmental sensor is further included, wherein the environmental sensor is used to detect the temperature and humidity of the environment;

[0039] The controller is also configured to:

[0040] If the humidity is greater than or equal to the humidity threshold, sending a command to the condensing fan to extend the running time of the condensing fan;

[0041] If the temperature is greater than or equal to a first temperature threshold, a command is sent to the condensing fan to reduce the operating time of the condensing fan.

[0042] In some feasible embodiments, the controller is further configured to:

[0043] Obtaining a maintenance time, where the maintenance time is a time during which the humidity is greater than or equal to a humidity threshold;

[0044] If the maintenance time is greater than or equal to the maintenance time threshold, sending an instruction to the condensing fan to control the condensing fan to run at a first preset speed;

[0045] If the temperature is lower than a second temperature threshold, an instruction is sent to the condensing fan to control the condensing fan to operate at a second preset speed, the first temperature threshold is higher than the second temperature threshold, and the second preset speed is a speed lower than the speed threshold.

[0046] In a second aspect, the present application provides a refrigerator door closing pressure relief control method, comprising:

[0047] Obtaining a first detection result, where the first detection result is a first result of the switch sensor detecting the door state;

[0048] If the first detection result is closed, a command is sent to the condensing fan to control the condensing fan to run at a first preset speed and to suck the air out through the air flow channel. The first preset speed is a speed greater than a speed threshold, and the airflow is the airflow brought in when the door body is closed.

[0049] It can be seen from the above technical scheme that the present application provides a refrigerator door closing pressure relief control system and method, the system is applied to a refrigerator, the refrigerator is provided with a box body, a door body, a compartment, and a compressor compartment, the system includes: a condensing fan, a drain pipe, a switch sensor and a controller, the condensing fan is arranged in the compressor compartment, and the drain pipe connects the inside and outside of the compartment; one end of the drain pipe is arranged on the air inlet side of the condensing fan, and the other end of the drain pipe extends to the outside of the box to form an air flow channel; the switch sensor is arranged on the door body; the controller obtains a first detection result, the first detection result is the first result of the switch sensor detecting the state of the door body; if the first detection result is closed, an instruction is sent to the condensing fan to control the condensing fan to run at a first preset speed, and to suck out the airflow through the airflow channel, the first preset speed is a speed greater than the speed threshold, and the airflow is the airflow brought in when the door body is closed. By starting the condensing fan when the refrigerator is closed, and using the drain pipe to suck out the airflow brought into the room by the door body to the outside of the box, the air pressure inside and outside the refrigerator can be quickly balanced to solve the problem of poor food preservation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0051] Figure 1A schematic diagram of the structure of a refrigerator door closing pressure relief control system provided in an embodiment of the present application;

[0052] Figure 2 A schematic diagram of the switch sensor setting position provided in an embodiment of the present application;

[0053] Figure 3 A schematic diagram of a flow chart of a controller obtaining a pressure relief time according to an embodiment of the present application;

[0054] Figure 4 A schematic flow chart of a refrigerator door closing pressure relief control method provided in an embodiment of the present application.

[0055] Illustration Description:

[0056] 1-Box; 2-Condensing fan; 3-Drain pipe; 31-Valve; 4-Door; 5-Switch sensor. DETAILED DESCRIPTION

[0057] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0058] Take a multi-door air-cooled refrigerator as an example. This type of equipment adopts multi-cycle air cooling technology and independent temperature zone design. It can provide large-capacity storage space while suppressing frost in the compartments through air circulation, meeting users' needs for zoned preservation and efficient storage and access.

[0059] The door linkage control logic of a multi-door air-cooled refrigerator is combined with the air duct circulation system. When a door is opened, the condensing fan will automatically stop running to reduce energy consumption. When the door is closed, the airflow generated by the door movement will re-trigger the fan to start.

[0060] In a double-door refrigerator, if one door is closed and the other door is opened and then closed, the rapid closing of the door will cause outside air to rush into the box, causing a sudden increase in air pressure inside the box. The originally closed door may be instantly bounced open due to the internal pressure difference, and may not close tightly.

[0061] The patent application with publication number CN118129399A discloses a structure combining a spring pressure relief valve and a rotating shaft pressure relief valve, which adjusts the pressure inside and outside the refrigerator by opening and closing the valve body. This solution uses the spring elastic force to control the valve ball to block or open the pressure relief channel, trying to slowly balance the air pressure after closing the door. However, this type of mechanical pressure relief device relies on a passive pressure relief mechanism, which has a limited response speed and cannot quickly eliminate the problem of a sudden increase in pressure inside the box caused by the influx of airflow at the moment the door is closed.

[0062] Specifically, when the door is closed, a large amount of air enters the refrigerator compartment with the movement of the door, causing the pressure inside the box to rise sharply. Especially in multi-door refrigerators, the closed door is easily bounced open by the impact of airflow, causing the door to be loosely closed. This problem directly leads to problems such as cold leakage, increased energy consumption, frost or condensation in the compartment, and seriously restricts the energy efficiency performance and user experience of the refrigerator.

[0063] To solve the above problems, some embodiments of the present application provide a refrigerator door closing pressure relief control system, which is applied to a refrigerator. The refrigerator is provided with a box body 1, a door body 4, a compartment, and a compressor compartment. The control system can optimize the pressure balance of the refrigerator during the door closing process and reduce the influence of the air pressure fluctuations generated when the door body 4 is closed on the internal structure and sealing performance of the refrigerator.

[0064] like Figure 1 As shown, the pressure relief control system includes:

[0065] The condensing fan 2 is arranged in the compressor compartment. The condensing fan 2 serves as a power source of the system and is used to adjust the rotation speed under the instruction of the controller to achieve a specific airflow control function.

[0066] The drain pipe 3 connects the inside and outside of the compartment; one end of the drain pipe 3 is arranged on the air inlet side of the condensing fan 2, and the other end of the drain pipe 3 extends to the outside of the box body 1 to form an air flow channel. When the door body 4 is closed, the air flow brought in can enter the air inlet of the condensing fan 2 through the drain pipe 3 and then be discharged.

[0067] In order to sense the opening and closing state of the door body 4, a switch sensor 5 is also provided, which is arranged on the door body 4 and can detect the opening and closing state of the door body 4 in real time and feed back the detection result to the controller. The controller is configured as follows:

[0068] Obtain a first detection result, which is the first result of the switch sensor 5 detecting the state of the door body 4. If the first detection result is closed, send an instruction to the condensing fan 2 to control the condensing fan 2 to run at a first preset speed and to suck the airflow out through the airflow channel. The first preset speed is a speed greater than a speed threshold, and the airflow is the airflow brought in when the door body 4 is closed.

[0069] The controller obtains the first detection result detected by the switch sensor 5, which represents the current state of the door body 4, that is, open or closed, and then judges the first detection result. If the judgment result is that the door body 4 is closed, a control instruction is sent to the condensing fan 2 to make it run at a first preset speed.

[0070] The first preset rotation speed is set to be greater than the rotation speed threshold to ensure that the condensing fan 2 can generate a sufficiently strong suction force to effectively suck out the airflow brought in when the door body 4 is closed through the drain pipe 3.

[0071] In practical applications, in order to more accurately control the speed of the condensing fan 2, a speed sensor may be further included, which is connected to the condensing fan 2 and can monitor the actual speed of the condensing fan 2 in real time and feed this data back to the controller. The controller fine-tunes the speed of the condensing fan 2 according to the feedback from the speed sensor to ensure that it always remains within the preset speed range.

[0072] In order to enhance the stability and reliability of the system, a fault detection module can also be set up, which is used to monitor the operating status of the system in real time, and send an alarm signal to the controller when an abnormality or fault is found. The controller takes processing measures according to the type of the alarm signal, for example, stopping the operation of the condensing fan 2, starting the backup system, etc.

[0073] By adopting the fault detection module, the system's operating status can be monitored in real time and any abnormalities or faults can be discovered and handled in a timely manner.

[0074] In a specific implementation, in order to optimize the design of the airflow channel, one end of the drain pipe 3 can be designed to be close to the side wall of the air inlet of the condensing fan 2 to ensure that the airflow can smoothly enter the condensing fan 2. At the same time, the other end of the drain pipe 3 can extend to the outside of the box 1 so that the sucked airflow can be safely discharged into the environment.

[0075] By controlling the rotation speed of the condensing fan 2, the airflow brought in when the door body 4 is closed can be sucked out, thereby avoiding the influence of air pressure fluctuations on the internal structure and sealing performance of the refrigerator, which not only improves the stability and reliability of the refrigerator, but also extends its service life.

[0076] To reduce energy consumption and noise, Figure 2 As shown, in some embodiments, the controller is configured to:

[0077] After the condensing fan 2 runs at the first preset speed, a second detection result is obtained, where the second detection result is a second result of the switch sensor 5 detecting the state of the door body 4;

[0078] If the second detection result is open, send a command to the condensing fan 2 to control the condensing fan 2 to stop running;

[0079] If the second detection result is off, obtain the pressure relief time, where the pressure relief time is the time during which the condensing fan 2 runs at the first preset speed;

[0080] If the pressure relief time is greater than or equal to the preset pressure relief time, a command is sent to the condensing fan 2 to control the condensing fan 2 to operate at a speed threshold.

[0081] After the condensing fan 2 runs at the first preset speed, the controller enters the monitoring state and obtains the second detection result, which refers to the detection result of the switch sensor 5 on the state of the door body 4. If the second detection result is open, that is, the door body 4 is not closed, the controller will send a stop instruction to the condensing fan 2.

[0082] When the door 4 is not closed, if the condensing fan 2 continues to run, it may cause problems such as airflow turbulence and increased noise, and may even damage the door 4 or cause personal injury due to airflow impact. Therefore, after detecting that the door 4 is open, the controller will quickly cut off the power supply of the condensing fan 2 to ensure that it stops running.

[0083] If the second detection result is closed, that is, the door body 4 is in a normally closed state, the controller will obtain the pressure relief time, which refers to the time period during which the condensing fan 2 runs at the first preset speed. The length of this time period determines the degree of release of the internal pressure of the condensing fan 2. The controller can record the running time of the condensing fan 2 through the timing module.

[0084] After obtaining the pressure relief time, the controller will compare it with the preset pressure relief time. The preset pressure relief time is a threshold value pre-set according to equipment characteristics and safety requirements, and is used to determine whether the condensing fan 2 has completed a sufficient pressure relief process.

[0085] If the pressure relief time is greater than or equal to the preset pressure relief time, it means that the internal pressure of the condensing fan 2 has been fully released. At this time, the controller will send a command to the condensing fan 2 to control it to run at the speed threshold. The speed threshold is a speed range set according to the equipment performance and energy consumption requirements, which can ensure the normal operation of the condensing fan 2 and reduce energy consumption and noise.

[0086] During actual operation, the controller will make adaptive adjustments based on the actual operating conditions of the condensing fan 2 and environmental parameters (such as temperature, humidity, etc.) to optimize the performance and energy consumption of the equipment.

[0087] By real-time monitoring of the state of the door body 4 and the operating state of the condensing fan 2, the controller can quickly take processing measures when an abnormal situation occurs. The controller makes adaptive adjustments based on the actual operating conditions and environmental parameters of the condensing fan 2, thereby reducing energy consumption and noise.

[0088] The pressure relief control when the refrigerator door is closed is realized through the coordinated action of the condensing fan 2, the drain pipe 3, the switch sensor 5 and the controller. On the one hand, by controlling the speed and running time of the condensing fan 2, the pressure fluctuation inside the refrigerator is reduced, and the stability and service life of the refrigerator are improved. On the other hand, the drain pipe 3 is used to realize the air flow channel.

[0089] In the case of household refrigerators, the refrigerator door closing pressure relief control system mainly meets the user's needs for refrigerator stability and service life. In the case of commercial refrigerators, for example, in commercial kitchens, refrigerators may need to withstand higher temperature and humidity environments, as well as more frequent door opening and closing operations. At this time, it is possible to adaptably increase the heat dissipation device of the condensing fan 2, optimize the material and layout of the drain pipe 3, and improve the sensitivity and accuracy of the switch sensor 5. In some embodiments, a valve 31 is provided at one end of the drain pipe 3 away from the condensing fan 2.

[0090] In order to optimize the operating efficiency of the condensing fan 2 and the stability of the system, in some embodiments, the controller is further configured as follows:

[0091] Obtaining the rotation speed of the condensing fan 2;

[0092] If the rotation speed of the condensing fan 2 is the rotation speed threshold, a command is sent to the valve 31 to control the valve 31 to close the air flow channel.

[0093] During actual operation, the controller will periodically obtain the speed data of the condensing fan 2. For example, every one minute, the controller will read the speed value of the condensing fan 2 and compare it with the preset speed threshold. If the speed value exceeds the threshold, the controller determines that the condensing fan 2 may be in an overload state and sends a closing instruction to the valve 31.

[0094] If the controller detects that the current speed reaches or exceeds the threshold, it determines that the fan may be in an overloaded or abnormal state. At this time, measures need to be taken to avoid failure or damage. The controller will send a control instruction to the valve 31 connected to the air flow channel. The instruction is transmitted to the valve 31 controller through a preset communication protocol (such as Modbus, CAN bus, etc.), instructing it to perform a closing operation.

[0095] After receiving the command, the valve 31 will respond and close the air flow channel, thereby cutting off the connection between the condensing fan 2 and other parts of the system. This process not only prevents system instability caused by fan abnormality, but also avoids additional energy consumption and noise that may be generated by fan overload.

[0096] For example, at a certain time point, due to the increase in ambient temperature or the increase in the load of the refrigeration equipment, the speed of the condensing fan 2 rises rapidly and exceeds the preset speed threshold. At this time, the controller detects this change and sends a closing command to the valve 31. After receiving the command, the valve 31 responds and closes the airflow channel.

[0097] In the embodiment, a safety protection strategy may be added, for example, a redundant communication channel may be provided between the controller and the valve 31 to ensure that control instructions can be sent normally in the event of a single communication failure. At the same time, an emergency stop button or a manual control device may be provided to quickly cut off the system power supply and close all valves 31 in an emergency.

[0098] In some embodiments, the number of the compartments is multiple, and the drain pipe 3 includes multiple branch pipes, the branch pipes correspond to the compartments and are connected to the air inlet side of the condensing fan 2;

[0099] The controller is also configured to:

[0100] Obtaining a third detection result, where the third detection result is a third result of the switch sensor 5 detecting the state of the door body 4;

[0101] If the third detection result is closed, matching the door body 4 based on the third result;

[0102] Based on the door body 4 matching the compartment, the branch pipeline corresponding to the compartment is marked, and an instruction is sent to the branch pipeline to control the conduction of the branch pipeline.

[0103] There are multiple compartments, which are arranged in the refrigerator, such as a refrigerating chamber, a freezing chamber, and a temperature-changing chamber, to meet different storage or processing requirements. Each compartment has different functions and characteristics and can work together.

[0104] The drain pipe 3 includes a plurality of branch pipes, which can discharge the liquid in each compartment. Each branch pipe corresponds to a compartment, thereby achieving communication with the air inlet side of the condensing fan 2 .

[0105] By connecting the branch pipeline to the air inlet side of the condensing fan 2, it can be ensured that the liquid in the compartment can be discharged while avoiding interference with the operation of the condensing fan 2.

[0106] like Figure 3 As shown, the controller needs to obtain the third detection result, which refers to the result obtained after the switch sensor 5 detects the state of the door body 4. In this embodiment, the switch sensor 5 is installed at the hinge of the door body 4, which can monitor the state changes of the door body 4 in real time and transmit the detection results to the controller.

[0107] If the third detection result is closed, that is, the door body 4 is in a closed state, the controller will match the corresponding door body 4 according to the detection result. Since there may be multiple door bodies 4 in the device or system, the controller needs to identify the door body 4 that is currently in a closed state. After matching the corresponding door body 4, the corresponding compartment is further matched based on this door body 4. Since each door body 4 has a corresponding relationship with the compartment it is in, the controller can indirectly determine the corresponding compartment by matching the door body 4.

[0108] After the compartment is determined, the branch pipeline corresponding to the compartment is marked, and the conduction state of the branch pipeline can be accurately controlled. The marking method can set a mark bit in the internal storage of the controller, or send a specific signal to the branch pipeline for marking.

[0109] The controller will send instructions to the marked branch pipeline to control the conduction of the branch pipeline. This instruction is an electrical signal or digital signal, which will be received and executed by the actuator (such as solenoid valve, electric valve, etc.) in the branch pipeline. After receiving the instruction, the actuator will change the conduction state of the branch pipeline to achieve the discharge or circulation of the liquid.

[0110] For example, the device includes three compartments, marked as A, B and C, and each compartment is equipped with a door body 4 and a corresponding branch pipeline. When the door body 4 of compartment A is closed, the switch sensor 5 will detect it and transmit the detection result to the controller. After receiving the detection result, the controller will first match the corresponding door body 4, that is, the door body 4 of compartment A, and further match it to the corresponding compartment, that is, compartment A. The controller will mark the branch pipeline corresponding to compartment A and send instructions to this branch pipeline to control its conduction state.

[0111] In some embodiments, the controller is further configured to:

[0112] Preset predefined rules;

[0113] When a plurality of the door bodies 4 are closed at the same time, the pressure relief priority corresponding to the door bodies 4 is determined based on predefined rules;

[0114] According to the pressure relief priority, the condensing fan 2 is controlled to suck out the airflow brought in when each door body 4 is closed through the air flow channel.

[0115] The predefined rules at least include the functional type of the compartment, the size of the door body 4, and the air pressure difference in the compartment. It is understandable that different types of compartments have different requirements for air pressure difference. For example, a storage compartment may need to maintain a lower air pressure difference to prevent items from getting wet or oxidized.

[0116] Doors 4 of different sizes produce different changes in air pressure when they are closed. Large-sized door 4 may bring in more air when closed, thereby increasing the change in air pressure difference. Therefore, when setting predefined rules, the size of the door 4 and its effect on the air pressure difference need to be considered.

[0117] In addition to the functional type of the compartment and the size of the door 4, the size of the air pressure difference directly affects the performance and safety of the compartment. For example, too high an air pressure difference may cause damage to the compartment structure or damage to items; too low an air pressure difference may cause external pollutants to enter the compartment.

[0118] When multiple doors 4 are closed at the same time, the pressure relief priority corresponding to the door 4 is determined based on predefined rules. In practical applications, multiple doors 4 may be closed at the same time. If all doors 4 are closed at the same speed and in the same way, it may cause a sharp change in the air pressure difference, thereby affecting the performance and safety of the compartment. Therefore, it is necessary to assign a pressure relief priority to the door 4 based on predefined rules.

[0119] The determination of the pressure relief priority may involve multiple factors. For example, for compartments that are particularly sensitive to changes in air pressure differences, it may be necessary to prioritize closing those doors 4 that are larger or in critical locations to reduce the magnitude of changes in air pressure differences. At the same time, for compartments that already have air pressure difference deviations, it may be necessary to prioritize closing those doors 4 that can correct the deviations to restore the balance of the air pressure difference.

[0120] When determining the pressure relief priority, the controller also needs to consider the mutual influence between the door bodies 4. For example, when two adjacent door bodies 4 are closed at the same time, the air pressure difference between them may affect each other. Therefore, the controller needs to comprehensively consider these factors to ensure the accuracy and rationality of the pressure relief priority.

[0121] According to the pressure relief priority, the condensing fan 2 is controlled to suck out the airflow brought in when each door body 4 is closed through the airflow channel. The condensing fan 2 is a commonly used air pressure regulating device, which adjusts the air pressure difference in the room by sucking or exhausting air. When multiple doors 4 are closed at the same time, the controller controls the operating state of the condensing fan 2 and the opening and closing degree of the airflow channel according to the pressure relief priority.

[0122] Specifically, when a door body 4 is closed, the controller will detect the air flow and pressure difference changes it brings in, and then adjust the speed of the condensing fan 2 and the opening of the airflow channel according to the preset pressure relief priority and real-time pressure difference data to suck out excess airflow and restore the balance of the pressure difference.

[0123] For example, in a storage room, there are two adjacent doors A and B. When they are closed at the same time, due to the larger size of door A 4, the controller will give priority to adjusting the change in air pressure difference when door A 4 is closed. At the same time, in order to maintain the balance and stability of the air pressure difference, the controller will control the condensing fan 2 to suck out the airflow brought in when door A 4 is closed through the air flow channel. When the air pressure difference of door A 4 tends to stabilize, the controller will adjust the closing speed of door B 4 and the operating status of the condensing fan 2.

[0124] In this process, in order to reduce energy consumption and improve operating efficiency, the controller can use an intelligent control algorithm to optimize the operating state of the condensing fan 2. For example, when the pressure difference changes slightly, the controller can reduce the speed of the condensing fan 2 and the opening of the airflow channel; when the pressure difference changes significantly, the controller can increase the speed of the condensing fan 2 and the opening of the airflow channel.

[0125] The pressure difference balance and stable control can be achieved when multiple door bodies 4 are closed at the same time, which can not only improve the performance and safety of the compartment, but also reduce energy consumption and improve operation efficiency.

[0126] In some embodiments, an air pressure sensor is further included, wherein the air pressure sensor is used to monitor the air pressure difference between the inside and outside of the compartment;

[0127] The controller is also configured to:

[0128] obtaining the air pressure difference;

[0129] If the air pressure difference is greater than or equal to the air pressure difference threshold, a command is sent to the condensing fan 2 to control the condensing fan 2 to run at a first preset speed;

[0130] If the air pressure difference is less than the air pressure difference threshold, a command is sent to the condensing fan 2 to control the condensing fan 2 to operate at a speed of the speed threshold.

[0131] If the pressure difference is greater than or equal to the preset pressure difference threshold, it means that the pressure difference between the inside and outside of the room is large, and the condensing fan 2 may need to be more tightly regulated to better maintain the air pressure stability in the room. The controller sends a command to the condensing fan 2 to control the condensing fan 2 to run at a first preset speed, which is higher than the normal speed, so as to adjust the air pressure state in the room more quickly.

[0132] If the air pressure difference is less than the air pressure difference threshold, it means that the air pressure difference between the inside and outside of the room is small, and no excessive regulation is required. At this time, the controller will send a command to the condensing fan 2 to control the condensing fan 2 to run at a speed threshold, which is a relatively stable value, and is intended to maintain the air pressure in the room in a relatively stable state.

[0133] When the air pressure difference is large, the system can automatically adjust the speed of the condensing fan 2 to adjust the air pressure state more quickly; when the air pressure difference is small, the system can maintain the condensing fan 2 running at a relatively stable speed to maintain a stable air pressure state, which not only improves the operating efficiency of the system, but also reduces energy consumption and noise pollution.

[0134] From the perspective of technical solutions, the beneficial effects of this embodiment are mainly reflected in the following aspects:

[0135] First, by introducing components such as air pressure sensors and controllers, accurate monitoring and control of the air pressure inside and outside the room is achieved. This design not only improves the operating efficiency and stability of the system, but also reduces energy consumption and noise pollution.

[0136] Secondly, by setting reasonable pressure difference threshold and speed threshold, the condensing fan 2 can be precisely regulated according to the actual use environment and needs. This design not only avoids the energy consumption and noise problems caused by excessive regulation, but also improves the reliability and stability of the system.

[0137] Finally, the design of this embodiment also has the advantages of being simple, easy to maintain and expand. By using high-precision and reliable components and reasonable layout design, the stability and accuracy of the system can be ensured; at the same time, by regularly monitoring and maintaining the system, abnormal situations or faults can be discovered and handled in a timely manner to avoid affecting the normal operation of the system.

[0138] To optimize the performance and efficiency of the condensing fan 2, in some embodiments, the cross-sectional area of ​​one end of the drain pipe 3 arranged on the air inlet side of the condensing fan 2 is larger than the cross-sectional area of ​​one end of the drain pipe 3 extending to the outside of the box 1.

[0139] A resistance optimization component is arranged in the air flow channel of the drain pipe 3 , and the resistance optimization component includes a guide element, and the guide element is a spiral guide plate, and the spiral guide plate is arranged on the inner wall of the drain pipe 3 .

[0140] On the air inlet side of the condensing fan 2, due to the generation and accumulation of condensed water, a larger cross-sectional area is required to ensure smooth discharge of water flow and avoid blockage. Therefore, the cross-sectional area of ​​one end of the drain pipe 3 arranged on this side is designed to be larger than the cross-sectional area of ​​one end of the drain pipe 3 extending to the outside of the box 1, which helps to reduce the pressure loss of water flow in the drain pipe 3 and prevent the problem of poor drainage caused by too small a cross-sectional area. At the same time, since the water flow on the air inlet side is relatively large, a larger cross-sectional area can better meet this demand and ensure that the condensed water can be discharged quickly.

[0141] Furthermore, in order to further optimize the performance of the drain pipe 3, a resistance optimization component is provided in the air flow channel of the drain pipe 3, and the resistance optimization component is used to reduce the resistance of the air flow in the drain pipe 3 and improve the overall efficiency of the condensing fan 2.

[0142] The spiral guide vane is arranged on the inner wall of the drain pipe 3, which not only helps to guide the flow direction of the airflow in the drain pipe 3, but also disperses the speed and pressure of the airflow, thereby reducing resistance. When the airflow passes through the spiral guide vane, its flow path is changed, so that the airflow can pass through the drain pipe 3 more smoothly, avoiding additional resistance caused by airflow turbulence. At the same time, the spiral guide vane can also play a certain role in noise reduction, reducing the noise level of the condensing fan 2 during operation.

[0143] It is understandable that when more efficient airflow guidance is required, the number of spiral guide vanes can be increased or their spiral angles can be changed; when the noise level needs to be reduced, the spacing or shape of the guide vanes can be adjusted.

[0144] In some embodiments, an environmental sensor is further included, wherein the environmental sensor is used to detect the temperature and humidity of the environment;

[0145] The controller is also configured to:

[0146] If the humidity is greater than or equal to the humidity threshold, sending a command to the condensing fan 2 to extend the running time of the condensing fan 2;

[0147] If the temperature is greater than or equal to the first temperature threshold, a command is sent to the condensing fan 2 to reduce the operating time of the condensing fan 2.

[0148] Environmental sensors may include but are not limited to temperature and humidity sensors, thermistors, capacitive humidity sensors, etc., which can measure the temperature and humidity levels of the environment and convert these data into electrical signals or other recognizable forms.

[0149] If the humidity data detected by the controller is greater than or equal to the preset humidity threshold, it means that the humidity in the environment is high, which will cause or aggravate the condensation phenomenon. To deal with this situation, the controller will send a command to the condensing fan 2 to extend its running time. Extending the running time of the condensing fan 2 helps to increase air flow, thereby accelerating the evaporation and discharge of condensed water droplets and reducing the impact of condensation on system performance.

[0150] On the other hand, if the temperature data detected by the controller is greater than or equal to the preset first temperature threshold, it means that the ambient temperature is high, which will pose a challenge to the heat dissipation performance of the system. In a high temperature environment, if the condensing fan 2 continues to run at a high load, it will increase energy consumption and accelerate equipment wear. Therefore, in order to balance the heat dissipation performance and energy consumption, the controller will send a command to the condensing fan 2 to reduce its running time.

[0151] Reducing the operating time of the condensing fan 2 can reduce energy consumption and noise to a certain extent, while alleviating the burden on heat dissipation performance.

[0152] In some embodiments, machine learning algorithms can also be introduced to train the controller so that it can more accurately predict and adapt to temperature and humidity changes in different environments, which can not only improve the response speed and accuracy of the system, but also further reduce energy consumption and failure rate.

[0153] In some embodiments, the controller is further configured to:

[0154] Obtaining a maintenance time, where the maintenance time is a time during which the humidity is greater than or equal to a humidity threshold;

[0155] If the maintenance time is greater than or equal to the maintenance time threshold, sending a command to the condensing fan 2 to control the condensing fan 2 to run at a first preset speed;

[0156] If the temperature is lower than a second temperature threshold, an instruction is sent to the condensing fan 2 to control the condensing fan 2 to operate at a second preset speed, the first temperature threshold is higher than the second temperature threshold, and the second preset speed is a speed lower than the speed threshold.

[0157] The maintenance time refers to the length of time that the humidity value in the environment or a specific area is greater than or equal to the preset humidity threshold. The humidity threshold is pre-set according to the actual application scenario and the operating requirements of the device to ensure that the device operates under appropriate humidity conditions to avoid performance degradation or failure caused by excessively high or low humidity. To accurately obtain the maintenance time, the controller monitors the data of the humidity sensor in real time and calculates the continuous time period when the humidity value exceeds the threshold.

[0158] The controller compares the acquired maintenance time with a preset maintenance time threshold, which is also preset based on actual application scenarios and device characteristics, and is intended to determine when the operation strategy of the condensing fan 2 needs to be started or adjusted.

[0159] If the maintenance time is greater than or equal to the maintenance time threshold, it means that the ambient humidity continues to be high, which affects the heat dissipation performance of the equipment. Therefore, the controller sends an instruction to the condensing fan 2 to control the condensing fan 2 to run at the first preset speed.

[0160] In addition, to ensure that the device operates within a safe temperature range, the controller also monitors the ambient temperature and compares the temperature with a preset second temperature threshold, which is preset according to the thermal management strategy and operating requirements of the device. If the temperature is less than the second temperature threshold, it indicates that the current ambient temperature is low and the heat dissipation demand of the condensing fan 2 is relatively small.

[0161] In order to save energy and reduce noise pollution, the controller will send instructions to the condensing fan 2 to control the condensing fan 2 to run at a second preset speed. The second preset speed is less than the speed threshold, which means that the condensing fan 2 will run at a lower speed, which not only meets the heat dissipation requirements but also reduces energy consumption and noise.

[0162] For example, within a certain period of time, due to weather reasons, the humidity continues to be high and exceeds a preset humidity threshold, such as 70%. The controller calculates the maintenance time. When the maintenance time reaches a preset maintenance time threshold, such as 30 minutes, the controller determines that the condensing fan 2 needs to be started to reduce the humidity. The controller sends an instruction to the condensing fan 2 to run at a first preset speed, such as 2500 rpm. After receiving the instruction, the condensing fan 2 adjusts the speed and starts to reduce the humidity.

[0163] At the same time, the controller is also continuously monitoring the ambient temperature. At a certain moment, the ambient temperature drops to a preset second temperature threshold, such as below 25°C. The controller determines that the heat dissipation demand of the condensing fan 2 is small at this time, so it sends a command to the condensing fan 2 to run at a second preset speed, such as 1500 rpm. After receiving the command, the condensing fan 2 adjusts the speed to a lower level, which not only meets the heat dissipation demand, but also reduces energy consumption and noise.

[0164] By intelligently adjusting the condensing fan 2, the rotation speed of the condensing fan 2 can be adjusted in real time according to changes in ambient humidity and temperature, thereby ensuring that the equipment operates in the best state and improving the performance and stability of the equipment.

[0165] Based on the above refrigerator door closing pressure relief control system, Figure 4 As shown, some embodiments of the present application provide a refrigerator door closing pressure relief control method, comprising:

[0166] S100: Obtain a first detection result.

[0167] The first detection result is a first result of the switch sensor 5 detecting the state of the door body 4 .

[0168] S200: If the first detection result is off, send a command to the condensing fan 2 to control the condensing fan 2 to run at a first preset speed and to suck out the airflow through the airflow channel.

[0169] The first preset rotation speed is a rotation speed greater than a rotation speed threshold, and the airflow is the airflow brought in when the door body 4 is closed.

[0170] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A refrigerator door closing pressure relief control system, applied to a refrigerator, wherein the refrigerator is provided with a box body, a door body, a compartment, and a compressor compartment, characterized in that: include: A condensing fan is arranged in the compressor compartment; A drainage pipe, used to connect the interior and exterior of the room; One end of the drain pipe is arranged at the air inlet side of the condensing fan, and the other end of the drain pipe extends to the outside of the box to form an air flow channel; A switch sensor is arranged on the door body; The controller is configured as: Acquire a first detection result, where the first detection result is a first result of the switch sensor detecting the state of the door body; If the first detection result is closed, a command is sent to the condensing fan to control the condensing fan to operate at a first preset speed and to suck the air out through the airflow channel. The first preset speed is a speed greater than a speed threshold, and the airflow is the airflow brought in when the door body is closed.

2. The refrigerator door closing pressure relief control system according to claim 1, characterized in that: The controller is configured to: After the condensing fan runs at a first preset speed, a second detection result is obtained, where the second detection result is a second result of the switch sensor detecting the state of the door body; If the second detection result is open, sending a command to the condensing fan to control the condensing fan to stop running; If the second detection result is off, obtaining a pressure relief time, the pressure relief time being the time during which the condensing fan runs at a first preset speed; If the pressure relief time is greater than or equal to the preset pressure relief time, a command is sent to the condensing fan to control the condensing fan to operate at a speed threshold.

3. The refrigerator door closing pressure relief control system according to claim 2, characterized in that: A valve is provided at one end of the drain pipe away from the condensing fan; The controller is also configured to: Obtaining the rotation speed of the condensing fan; If the rotation speed of the condensing fan is a rotation speed threshold, a command is sent to the valve to control the valve to close the air flow channel.

4. The refrigerator door closing pressure relief control system according to claim 1, characterized in that: The number of the compartments is multiple, and the drain pipe includes multiple branch pipes, the branch pipes correspond to the compartments and are connected to the air inlet side of the condensing fan; The controller is also configured to: Obtaining a third detection result, where the third detection result is a third result of the switch sensor detecting the state of the door body; If the third detection result is closed, matching the door body based on the third result; Based on the door body matching the compartment, the branch pipeline corresponding to the compartment is marked, and an instruction is sent to the branch pipeline to control the conduction of the branch pipeline.

5. The refrigerator door closing pressure relief control system according to claim 4, characterized in that: The controller is also configured to: Presetting predefined rules, wherein the predefined rules at least include the functional type of the compartment, the size of the door body, and the air pressure difference within the compartment; When a plurality of the door bodies are closed at the same time, determining the pressure relief priorities corresponding to the door bodies based on predefined rules; According to the pressure relief priority, the condensing fan is controlled to suck out the airflow brought in when each door is closed through the air flow channel.

6. The refrigerator door closing pressure relief control system according to claim 1, characterized in that: Also includes an air pressure sensor, the air pressure sensor is used to monitor the air pressure difference between the inside and outside of the chamber; The controller is also configured to: obtaining the air pressure difference; If the air pressure difference is greater than or equal to the air pressure difference threshold, sending a command to the condensing fan to control the condensing fan to run at a first preset speed; If the air pressure difference is less than the air pressure difference threshold, a command is sent to the condensing fan to control the condensing fan to operate at a speed of a speed threshold.

7. The refrigerator door closing pressure relief control system according to claim 1, characterized in that: The cross-sectional area of ​​one end of the drain pipe disposed on the air inlet side of the condensing fan is greater than the cross-sectional area of ​​one end of the drain pipe extending to the outside of the box; A resistance optimization component is arranged in the air flow channel of the drain pipe. The resistance optimization component includes a flow guide element. The flow guide element is a spiral flow guide plate. The spiral flow guide plate is arranged on the inner wall of the drain pipe.

8. The refrigerator door closing pressure relief control system according to claim 1, characterized in that: Also included is an environmental sensor, which is used to detect the temperature and humidity of the environment; The controller is also configured to: If the humidity is greater than or equal to the humidity threshold, sending a command to the condensing fan to extend the running time of the condensing fan; If the temperature is greater than or equal to a first temperature threshold, a command is sent to the condensing fan to reduce the operating time of the condensing fan.

9. The refrigerator door closing pressure relief control system according to claim 8, characterized in that: The controller is also configured to: Obtaining a maintenance time, where the maintenance time is a time during which the humidity is greater than or equal to a humidity threshold; If the maintenance time is greater than or equal to the maintenance time threshold, sending an instruction to the condensing fan to control the condensing fan to operate at a first preset speed; If the temperature is lower than a second temperature threshold, an instruction is sent to the condensing fan to control the condensing fan to operate at a second preset speed, the first temperature threshold is higher than the second temperature threshold, and the second preset speed is a speed lower than the speed threshold.

10. A refrigerator door closing pressure relief control method, characterized in that: include: Obtaining a first detection result, where the first detection result is a first result of the switch sensor detecting the door state; If the first detection result is closed, a command is sent to the condensing fan to control the condensing fan to run at a first preset speed and to suck the air out through the air flow channel. The first preset speed is a speed greater than a speed threshold, and the airflow is the airflow brought in when the door body is closed.

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