Nitrogen generation control method and system, and refrigerator

Abstract

A nitrogen generation control method and system, and a refrigerator. The nitrogen generation control method and system are applied to a nitrogen generation apparatus of a refrigerator. The method comprises: in response to a received nitrogen generation command, when a door of a refrigerator has been closed for a preset first time length and the refrigerator is in a refrigeration state, controlling a molecular sieve tower of a nitrogen generation apparatus to discharge gas; and after the molecular sieve tower has discharged the gas, controlling the nitrogen generation apparatus to generate nitrogen.

Description

Nitrogen production control method, system and refrigerator

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202411023141.5, filed on July 29, 2024, and entitled "A nitrogen production control method, system and a refrigerator", the contents of which are hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of home appliance control, in particular to a nitrogen production control method, system and a refrigerator. BACKGROUND

[0004] With the development of home appliance control technology, people's requirements for home appliances are gradually increasing. Generally, a refrigerator controls the temperature in the refrigerator to preserve food in the refrigerator. However, only by controlling the temperature to preserve food in the refrigerator, some food may have wrinkled and scarred surfaces, affecting the original taste and nutrition of the food.

[0005] Nitrogen, as a colorless and odorless inert gas, has been widely used in food preservation, so nitrogen production devices can be installed in refrigerators to control the nitrogen and temperature in the refrigerator to preserve food in the refrigerator.

[0006] However, the related nitrogen production control method only controls each component of the nitrogen production device to operate according to a preset time length and sequence to achieve periodic or predetermined nitrogen production, which is not suitable for the refrigerator environment. If the related nitrogen production control method is directly used to produce nitrogen in the refrigerator, the service life of the nitrogen production device will be affected due to the unsuitability of the nitrogen production device for the refrigerator environment.

[0007] There is currently no effective solution to the problem that the related nitrogen production control method for producing nitrogen in the refrigerator affects the service life of the nitrogen production device due to its unsuitability for the refrigerator environment. SUMMARY

[0008] According to various embodiments of the present application, a nitrogen production control method, system and a refrigerator are provided.

[0009] In a first aspect, the present application provides a nitrogen production control method applied to a nitrogen production device of a refrigerator. The method comprises the following steps:

[0010] In response to the received nitrogen production command, when the refrigerator door is closed for a preset first time length and the refrigerator is in a refrigeration state, the molecular sieve tower exhaust of the nitrogen production device is controlled.

[0011] After the molecular sieve tower exhaust is completed, the nitrogen production device is controlled to produce nitrogen.

[0012] In one embodiment, before controlling the molecular sieve tower of the nitrogen generator to exhaust, in response to the received nitrogen generation command, when the refrigerator door is closed for a preset first length of time and the refrigerator is in a refrigeration state, the method further comprises the following steps:

[0013] In response to the received nitrogen generation command, the opening time and the closing time of the refrigerator door are monitored in real time.

[0014] When the closing time of the refrigerator door reaches the preset first length of time, the refrigeration state of the refrigerator is detected.

[0015] In one embodiment, the method of controlling the molecular sieve tower of the nitrogen generator to exhaust, in response to the received nitrogen generation command, when the refrigerator door is closed for a preset first length of time and the refrigerator is in a refrigeration state, comprises the following steps:

[0016] In response to the received nitrogen generation command, when the refrigerator door is closed for the preset first length of time and the refrigerator is in a refrigeration state, the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is controlled to open.

[0017] When the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for a preset second length of time, the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is controlled to close.

[0018] In one embodiment, the method further comprises the following steps:

[0019] In response to the received first nitrogen generation command, when the closing time of the refrigerator door reaches a preset third length of time, the molecular sieve tower of the nitrogen generator is controlled to exhaust.

[0020] After the molecular sieve tower exhausts, the nitrogen generator is controlled to generate nitrogen.

[0021] In one embodiment, the method of controlling the nitrogen generator to generate nitrogen after the molecular sieve tower exhausts, comprises the following steps:

[0022] After the molecular sieve tower exhausts, after the nitrogen generator is controlled to generate nitrogen for a fourth length of time, if the refrigerator door is opened, the nitrogen generator is controlled to stop generating nitrogen; the fourth length of time is less than a preset nitrogen generation length of time.

[0023] In one embodiment, after the molecular sieve tower exhausts, after the nitrogen generator is controlled to generate nitrogen for a fourth length of time, if the refrigerator door is opened, the nitrogen generator is controlled to stop generating nitrogen, and the method further comprises the following steps:

[0024] When the refrigerator door closes for a preset first time period and the refrigerator is in a cooling state, the molecular sieve tower of the nitrogen generator is controlled to exhaust gas.

[0025] After the molecular sieve tower is vented, the nitrogen generator is controlled to produce nitrogen for a preset fifth time length and then stopped; the preset fifth time length is equal to the time difference between the preset nitrogen production time length and the fourth time length.

[0026] In one embodiment, after the molecular sieve tower is vented and the nitrogen generator is controlled to produce nitrogen, the following steps are included:

[0027] With the refrigerator door continuously closed, the refrigerator periodically generates nitrogen at preset time intervals.

[0028] In one embodiment, after the molecular sieve tower is vented and the nitrogen generator is controlled to produce nitrogen, the following steps are further included:

[0029] When the refrigerator door is opened and then closed for a preset first time period, and the refrigerator is in a cooling state, the molecular sieve tower of the nitrogen generator is controlled to exhaust gas.

[0030] After the molecular sieve tower has finished venting, the nitrogen generating device is controlled to generate nitrogen for a preset nitrogen generation time and then stopped.

[0031] In one embodiment, when the refrigerator door is closed after being opened for a preset first time period and the refrigerator is in a cooling state, controlling the molecular sieve tower of the nitrogen generator to exhaust gas includes the following steps:

[0032] After the refrigerator door is opened and then closed for a preset first time length, and after the refrigerator continues to cool for a preset sixth time length, the molecular sieve tower of the nitrogen generator is controlled to exhaust.

[0033] Secondly, this application also provides a nitrogen generation control system. A nitrogen generation device applied to a refrigerator, the system comprising:

[0034] An exhaust module is used to control the molecular sieve tower of the nitrogen generator to exhaust when the refrigerator door is closed for a preset first time length and the refrigerator is in a cooling state, in response to a received nitrogen generation command.

[0035] And a nitrogen generation module, used to control the nitrogen generation device to generate nitrogen after the molecular sieve tower is vented.

[0036] Thirdly, this application also provides a refrigerator. The refrigerator includes: a refrigeration unit, a nitrogen generator, and a processor and a memory connected to the refrigeration unit and the nitrogen generator;

[0037] The refrigeration device is configured to refrigerate the refrigerator when the refrigerator is in a refrigeration state.

[0038] The nitrogen production device is configured to produce nitrogen for the refrigerator.

[0039] The nitrogen production device comprises at least one molecular sieve tower, one air pump and one electromagnetic valve. The molecular sieve tower is internally filled with nitrogen production molecular sieve, configured to convert received air into nitrogen and oxygen to produce nitrogen for the refrigerator. The air pump is configured to fill air into the molecular sieve tower. The electromagnetic valve is located at an oxygen discharge end of the molecular sieve tower.

[0040] The memory stores a computer program, and the processor executes the computer program to implement the steps of the nitrogen production control method of the first aspect.

[0041] Details of one or more embodiments of the present application are described in the following drawings and description to make other features, objects and advantages of the present application more clear and easy to understand. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the disclosed drawings.

[0043] FIG. 1 is a hardware structure block diagram of a terminal of a nitrogen production control method provided by an embodiment of the present application.

[0044] FIG. 2 is a flowchart of a nitrogen production control method provided by an embodiment of the present application.

[0045] FIG. 3 is a flowchart of a nitrogen production control method provided by an optional embodiment of the present application.

[0046] FIG. 4 is a structure block diagram of a nitrogen production control system provided by an embodiment of the present application.

[0047] FIG. 5 is a structure block diagram of a refrigerator provided by an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the disclosed drawings.

[0049] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as those commonly understood by a person of ordinary skill in the art to which the present application belongs. In the present application, the terms "one", "a", "an", "the", "these", and similar words do not indicate quantity, and they can be singular or plural. In the present application, the terms "include", "contain", "have", and any variants thereof are intended to cover non-exclusive inclusion; for example, a process, method, and system, product or device containing a series of steps or modules (units) are not limited to the listed steps or modules (units), but can include steps or modules (units) not listed, or can include other steps or modules (units) inherent to the process, method, product or device. In the present application, the terms "connected", "connected", "coupled" and the like do not limit to physical or mechanical connection, but can include electrical connection, whether direct or indirect. In the present application, "multiple" means two or more. "And / or" describes the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. Generally, the character " / " represents an "or" relationship between the associated objects. In the present application, the terms "first", "second", "third" and the like are only used to distinguish similar objects, and do not represent a specific order of the objects.

[0050] The method embodiments provided in the present embodiment can be executed in a terminal, a computer or a similar computing device. For example, running on a terminal, Fig. 1 is a hardware structure block diagram of the terminal of the nitrogen production control method of the present embodiment. As shown in Fig. 1, the terminal can include one or more (only one is shown in Fig. 1) processors 102 and a memory 104 for storing data, wherein the processor 102 can include but not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above-mentioned terminal can also include a transmission device 106 for communication function and an input / output device 108. Those skilled in the art can understand that the structure shown in Fig. 1 is only schematic, which does not limit the structure of the above-mentioned terminal. For example, the terminal can also include more or less components than those shown in Fig. 1, or have a different configuration from that shown in Fig. 1.

[0051] The memory 104 can be used to store computer programs, such as software programs of application software and modules, such as a computer program corresponding to the nitrogen production control method in the embodiment. The processor 102 performs various functional applications and data processing by running the computer programs stored in the memory 104, that is, implements the method described above. The memory 104 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include memories remotely arranged with respect to the processor 102, which can be connected to the terminal through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0052] The transmission device 106 is used to receive or send data via a network. The network includes a wireless network provided by a communication provider of the terminal. In an example, the transmission device 106 includes a network adapter (NIC) which can be connected to other network devices through a base station so as to communicate with the Internet. In an example, the transmission device 106 can be a radio frequency (RF) module which is used to communicate with the Internet in a wireless manner.

[0053] In the embodiment, a nitrogen production control method is provided, and Fig. 2 is a flowchart of the nitrogen production control method in the embodiment. As shown in Fig. 2, the flow includes the following steps:

[0054] In step S210, in response to the received nitrogen production command, the molecular sieve tower of the nitrogen production device is controlled to exhaust when the refrigerator door is closed for a preset first length of time and the refrigerator is in a refrigeration state.

[0055] The nitrogen production command can be a command sent by a user to start the nitrogen production function. In intelligent control of the refrigerator, the user can select to start and stop the nitrogen production function according to needs to realize the oxygen control fresh-keeping function of opening the fresh-keeping compartment of the refrigerator and the oxygen control fresh-keeping function of closing the fresh-keeping compartment of the refrigerator. Specifically, the user can send a command to start and stop the nitrogen production function to the main control end of the refrigerator through an operation panel of the refrigerator or a mobile phone APP (application) and the like. The fresh-keeping compartment can be an oxygen control fresh-keeping space in the refrigerator for storing food. It should be noted that the fresh-keeping compartment has good airtightness, and when the refrigerator door is closed, the fresh-keeping compartment slowly exchanges air with the outside or does not exchange air at all to maintain a low-oxygen environment in the fresh-keeping compartment and realize fresh-keeping of food, and when the refrigerator door is opened, the air in the fresh-keeping compartment quickly exchanges with the air in the external environment of the refrigerator, and the air in the fresh-keeping compartment becomes normal nitrogen-oxygen state.

[0056] Because of the opening and closing of the refrigerator door, the concentration occurs in the daily meal preparation period, especially the noon or evening meal preparation period, during which time, because of the need for more food preparation, there may be a situation of opening and closing the refrigerator door multiple times in a short period of time. If nitrogen is generated immediately when the refrigerator door is closed, the nitrogen generation process will be interrupted multiple times due to the opening and closing of the refrigerator door multiple times in a short period of time, and there will be a situation of starting the nitrogen generating device multiple times in a short period of time, which will affect the service life of the nitrogen generating device. In order to avoid the situation of starting the nitrogen generating device multiple times in a short period of time, the embodiment adopts monitoring the opening time and closing time of the refrigerator door to ensure that the refrigerator door is closed for a preset first time length before controlling the nitrogen generating device to generate nitrogen. The above-mentioned preset first time length can be set according to actual needs. For example, the preset first time length can be set to 30 minutes, or the preset first time length can be set to 10 minutes.

[0057] The above-mentioned nitrogen generating device can be a nitrogen generating device that uses the PSA (Pressure Swing Adsorption) method to generate nitrogen. The specific nitrogen generation process is that when air enters the molecular sieve tower of the nitrogen generating device, the molecular sieve in the molecular sieve tower will preferentially intercept oxygen, and then release nitrogen, thereby generating nitrogen in this way. In this process, the molecular sieve in the molecular sieve tower also has the characteristic of preferentially adsorbing moisture in the air. When the molecular sieve adsorbs too much moisture, the moisture will destroy the microscopic micropores on the surface of the molecular sieve that adsorb oxygen, so that the molecular sieve cannot fully analyze the nitrogen and oxygen in the air, resulting in a decrease in the nitrogen generation capacity of the molecular sieve. Therefore, before the air is filled into the molecular sieve tower of the nitrogen generating device, it is necessary to ensure that the humidity of the filled air reaches the preset humidity requirement, that is, the humidity of the air filled into the molecular sieve tower of the nitrogen generating device needs to be less than a humidity threshold value. The above-mentioned humidity threshold value is the minimum humidity value that affects the nitrogen generation capacity of the nitrogen generating device.

[0058] Generally, the nitrogen generating device uses the air in the refrigerator or the air outside the refrigerator as the raw material for generating nitrogen. When the nitrogen generating device uses the air outside the refrigerator as the raw material for generating nitrogen, the humidity of the air outside the refrigerator is generally greater than the humidity threshold value. At this time, the air outside the refrigerator needs to be dehumidified first, and then the dehumidified air is filled into the molecular sieve tower of the nitrogen generating device for nitrogen generation. However, using this method, a dehumidification device needs to be installed in the refrigerator or outside the refrigerator, which will increase the cost and is not conducive to the integration of the nitrogen generating device. When the nitrogen generating device uses the air in the refrigerator as the raw material for generating nitrogen, generally, the humidity in the refrigerator is greater than the humidity threshold value. However, when the refrigerator is in a refrigeration state, the humidity of the air in the refrigerator will decrease significantly, and the humidity in the refrigerator will decrease to less than the humidity threshold value. Based on this, the present embodiment controls the nitrogen generating device to generate nitrogen when the refrigerator is in a refrigeration state. This implementation does not need to further dehumidify the air in the refrigerator, and directly uses the air in the refrigerator as the raw material for generating nitrogen, which is simple, easy to implement, cost-saving, and avoids the problem of affecting the service life of the nitrogen generating device caused by the excessive humidity of the air filled into the molecular sieve tower of the nitrogen generating device.

[0059] Step S220, after the molecular sieve tower exhaust is completed, the nitrogen generating device is controlled to generate nitrogen.

[0060] It should be noted that before the nitrogen generating device is controlled to generate nitrogen, the molecular sieve tower of the nitrogen generating device may be in a high pressure state caused by the last nitrogen generation. At this time, the gas pump of the nitrogen generating device is bearing the load caused by the high pressure. If the nitrogen generating device is directly controlled to generate nitrogen, the gas pump may be damaged due to the direct start of the load. Based on this, before the nitrogen generating device is controlled to generate nitrogen, the molecular sieve tower of the nitrogen generating device needs to be controlled to exhaust, so as to ensure that the nitrogen generating device is controlled to generate nitrogen on the premise that the state of the molecular sieve tower and the gas pump of the nitrogen generating device returns to the normal pressure state, thereby avoiding the problem of affecting the service life of the nitrogen generating device caused by the pressure start of the gas pump of the nitrogen generating device.

[0061] Further, the above control of the nitrogen generating device to generate nitrogen can be to control the nitrogen generating device to generate nitrogen and stop after a preset nitrogen generation time length. The above preset nitrogen generation time length can be set according to specific circumstances, as long as it can ensure that the nitrogen in the fresh-keeping compartment of the refrigerator is filled to a preset concentration or the oxygen in the fresh-keeping compartment of the refrigerator is reduced to a preset concentration after the nitrogen generating device generates nitrogen for the preset nitrogen generation time length. It should be noted that due to the structural limitations of the refrigerator, the nitrogen generating device mounted on the refrigerator generally has a small size and low complexity, and therefore has limited nitrogen generation capacity. Based on this, the preset nitrogen generation time length can be calculated according to the size of the fresh-keeping compartment of the refrigerator and the nitrogen generation efficiency of the nitrogen generating device.

[0062] The steps S210 to S220, by responding to the received nitrogen production command, when the refrigerator door is closed for a preset first time length and the refrigerator is in a refrigeration state, control the molecular sieve tower of the nitrogen production device to exhaust, and when the molecular sieve tower of the nitrogen production device exhausts, control the nitrogen production device to produce nitrogen. It produces nitrogen when the refrigerator is in a refrigeration state, because the air humidity in the refrigerator is reduced when the refrigerator is in a refrigeration state, so that the air humidity obtained by the molecular sieve tower of the nitrogen production device is lower, which solves the problem that the high humidity in the refrigerator and the high air humidity obtained by the molecular sieve tower affect the service life of the nitrogen production device. In addition, before producing nitrogen, the molecular sieve tower is first exhausted to avoid the pressure start of the gas pump of the nitrogen production device, so that the nitrogen production device can be combined with the environment of the refrigerator. The related nitrogen production control method solves the problem that the related nitrogen production control method produces nitrogen for the refrigerator, which affects the service life of the nitrogen production device because it is not suitable for the refrigerator environment.

[0063] In addition, in one embodiment, before step S210, the following steps are further included:

[0064] Step S202, in response to the received nitrogen production command, real-time monitoring of the opening time and closing time of the refrigerator door.

[0065] The opening time can refer to the length of time that the refrigerator door is continuously opened. The closing time can refer to the length of time that the refrigerator door is continuously closed. This step realizes the detection of the refrigeration state of the refrigerator when the closing time of the refrigerator reaches a preset first time length by real-time monitoring of the opening time and closing time of the refrigerator door. In addition, by detecting the opening time and closing time of the refrigerator door, the time interval of the user frequently opening and closing the refrigerator door and the interval time rule of the user opening and closing the refrigerator door can be determined according to the detection data, so as to set the opening and closing time of the nitrogen production function based on the time interval of the user frequently opening and closing the refrigerator door, and set a more reasonable first time length based on the interval time rule of the user opening and closing the refrigerator door.

[0066] Step S204, when the closing time of the refrigerator door reaches a preset first time length, the refrigeration state of the refrigerator is detected.

[0067] The refrigeration state of the refrigerator can include two states: the refrigerator is in a refrigeration state and the refrigerator is not in a refrigeration state. When the refrigeration device of the refrigerator is refrigerating the refrigerator, the refrigerator is in a refrigeration state, and when the refrigeration device of the refrigerator is not refrigerating the refrigerator, the refrigerator is not in a refrigeration state.

[0068] The steps S202 to S204 detect the opening time and the closing time of the refrigerator door in real time in response to the received nitrogen production command, so as to detect the refrigeration state of the refrigerator when the closing time of the refrigerator door reaches the preset first time length. The refrigeration state of the refrigerator is detected when the closing time of the refrigerator door reaches the preset first time length, so as to control the nitrogen production device to produce nitrogen in time when the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in the refrigeration state. The nitrogen is produced by using the air in the refrigerator when the refrigerator is in the refrigeration state, so as to ensure that the humidity of the air filled into the nitrogen production device does not affect the service life of the nitrogen production device, and the nitrogen production device can be combined with the environment of the refrigerator. The related nitrogen production control method for producing nitrogen for the refrigerator affects the service life of the nitrogen production device because it is not suitable for the environment of the refrigerator.

[0069] Further, in one embodiment, the step S210 of controlling the exhaust of the molecular sieve tower of the nitrogen production device in response to the received nitrogen production command when the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in the refrigeration state can include the following steps:

[0070] The step S212 of controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower of the nitrogen production device to open in response to the received nitrogen production command when the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in the refrigeration state.

[0071] When the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower of the nitrogen production device is opened, the molecular sieve tower of the nitrogen production device is in communication with the outside through the electromagnetic valve. If the molecular sieve tower itself is in a high pressure state, the oxygen adsorbed by the molecular sieve in the molecular sieve tower is released and discharged to the outside of the molecular sieve tower through the electromagnetic valve. In this process, the air pressure in the molecular sieve tower is reduced to be equal to the air pressure outside the molecular sieve tower.

[0072] The step S214 of controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to close when the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for a preset second time length.

[0073] The preset second time length can be set according to specific needs, as long as the air pressure in the molecular sieve tower can be reduced to be equal to the air pressure outside the molecular sieve tower within the preset second time length. For example, the preset second time length can be set to 10S.

[0074] The steps S212 to S214 are to control the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower of the nitrogen generating device to open when the refrigerator door is closed for the first preset time length and the refrigerator is in the refrigeration state in response to the received nitrogen generation command, and to control the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to close after the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for the second preset time length, so that the high pressure state of the molecular sieve tower is reduced to the normal pressure state, and the exhaust of the molecular sieve tower of the nitrogen generating device is controlled before the nitrogen generating device is controlled to generate nitrogen, so as to ensure that the nitrogen generating device starts to generate nitrogen when the state of the molecular sieve tower and the air pump of the nitrogen generating device returns to the normal pressure state, and avoid the problem that the service life of the nitrogen generating device is affected due to the pressure start of the air pump.

[0075] In one embodiment, the above-mentioned nitrogen generation control method further comprises the following steps:

[0076] Step S230: in response to the received first nitrogen generation command, controlling the molecular sieve tower of the nitrogen generating device to exhaust when the closing time of the refrigerator door reaches the third preset time length.

[0077] When the first nitrogen generation command is received, the refrigerator needs to be nitrogenized in a short time, and based on this, the third preset time length can be specifically set according to the needs, and can be a relatively short time length. Generally, the third preset time length is less than the first preset time length. For example, the third preset time length can be 15S.

[0078] Step S240: controlling the nitrogen generating device to generate nitrogen after the exhaust of the molecular sieve tower is completed.

[0079] The steps S230 to S240 are to control the nitrogen generating device to generate nitrogen when the closing time of the refrigerator door reaches the third preset time length in response to the received first nitrogen generation command, so as to ensure that the nitrogen generating device generates nitrogen quickly in a short time after receiving the first nitrogen generation command.

[0080] Alternatively, the molecular sieve tower of the nitrogen generating device can also be controlled to exhaust in response to the received first nitrogen generation command when the closing time of the refrigerator door reaches the third preset time length and the refrigerator is in the refrigeration state, and the nitrogen generating device can be controlled to generate nitrogen after the exhaust of the molecular sieve tower is completed.

[0081] Specifically, in one embodiment, based on step S220, the control of the nitrogen generating device to generate nitrogen after the exhaust of the molecular sieve tower is completed comprises the following steps:

[0082] Step S222: after the exhaust of the molecular sieve tower is completed, the refrigerator door is opened after the nitrogen generating device is controlled to generate nitrogen for a fourth time length, and the nitrogen generating device is controlled to stop generating nitrogen; the fourth time length is less than the preset nitrogen generation time length.

[0083] When the nitrogen generating device is controlled to generate nitrogen for the fourth time length, the refrigerator door is opened, and the oxygen control fresh-keeping space in the refrigerator is opened at this time. At this time, the fresh-keeping compartment of the refrigerator cannot maintain a low-oxygen state, and it is meaningless to continue to generate nitrogen in the refrigerator opening state. In addition, if nitrogen continues to be generated at this time when the refrigerator door is opened, a certain noise will be generated, affecting the user experience. Based on this, when the refrigerator door is opened, the nitrogen generating device needs to be controlled to stop generating nitrogen. In this step, when the refrigerator door is opened during the nitrogen generating process, the nitrogen generating device is controlled to stop generating nitrogen, thereby realizing the control of timely stopping nitrogen generation in the case of interruption of the nitrogen generating process, and avoiding the case that invalid nitrogen generation affects the service life of the nitrogen device.

[0084] Further, in one embodiment, after step S222, further comprising:

[0085] Step S224 controls the molecular sieve tower of the nitrogen generating device to exhaust when the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in a refrigeration state.

[0086] Step S226 controls the nitrogen generating device to generate nitrogen for a preset fifth time length and then stop after the molecular sieve tower exhausts; the preset fifth time length is equal to the preset nitrogen generating time length minus the time difference of the fourth time length.

[0087] The above steps S224 to S226 control the nitrogen generating device to generate nitrogen for a preset fifth time length and then stop after the molecular sieve tower exhausts when the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in a refrigeration state after the nitrogen generating process is interrupted due to the opening of the refrigerator door. The sum of the nitrogen generating time lengths before and after the interruption of the nitrogen generating process is the preset nitrogen generating time length. This avoids the case that the molecular sieve in the nitrogen generating device is consumed too quickly because the nitrogen generating device continues to generate nitrogen for the preset nitrogen generating time length after the refrigerator door is closed each time.

[0088] Further, in one embodiment, after step S220, the following steps are included:

[0089] Step S250 periodically generates nitrogen for the refrigerator according to a preset time interval under the condition that the refrigerator door is continuously closed.

[0090] The preset time interval can be set according to actual conditions, for example, the preset time interval can be 8 hours. The periodic nitrogen production of the refrigerator can be periodically detecting the refrigeration state of the refrigerator, when the refrigerator is in the refrigeration state, controlling the molecular sieve tower of the nitrogen production device to exhaust, after the molecular sieve tower exhaust is completed, controlling the nitrogen production device to produce nitrogen; when the refrigerator is not in the refrigeration state, continuously detecting until the refrigerator enters the refrigeration state, when the refrigerator continuously refrigerates for a preset sixth time length, controlling the molecular sieve tower of the nitrogen production device to exhaust, after the molecular sieve tower exhaust is completed, controlling the nitrogen production device to produce nitrogen. Specifically, it can be periodically detecting the refrigeration state of the refrigerator, when the refrigerator is in the refrigeration state, controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to open; when the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for a preset second time length, controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to close; after the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is closed, controlling the nitrogen production device to produce nitrogen for a preset nitrogen production time length and then stop. It can also be: when the refrigerator is not in the refrigeration state, continuously detecting until the refrigerator enters the refrigeration state, when the refrigerator continuously refrigerates for a preset sixth time length, controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to open; when the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for a preset second time length, controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to close; after the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is closed, controlling the nitrogen production device to produce nitrogen for a preset nitrogen production time length and then stop. The preset sixth time length can be set according to requirements, for example, the preset sixth time length can be set to 5 minutes, only need to ensure that the air humidity in the refrigerator is less than the humidity threshold after the refrigerator continuously refrigerates for the preset sixth time length.

[0091] This step realizes the periodic nitrogen production of the refrigerator according to the preset time interval, realizes the replenishment of nitrogen in the refrigerator according to the preset time interval, ensures that the fresh-keeping compartment of the refrigerator is in a low-oxygen fresh-keeping state, and realizes the continuous fresh-keeping of the food in the refrigerator.

[0092] In addition, in one embodiment, after step S220, the following steps are further included:

[0093] Step S260, when the refrigerator door is opened and closed for a preset first time length, and the refrigerator is in the refrigeration state, controlling the molecular sieve tower of the nitrogen production device to exhaust.

[0094] Step S270, when the molecular sieve tower exhaust is completed, controlling the nitrogen production device to produce nitrogen for a preset nitrogen production time length and then stop.

[0095] The steps S260 to S270 achieve the nitrogen production control after the refrigerator door is opened and then closed by controlling the nitrogen production device to produce nitrogen for a preset time length when the refrigerator is in the refrigeration state after the refrigerator door is opened and then closed for a preset first time length.

[0096] Specifically, in one embodiment, the step S260 of controlling the molecular sieve tower exhaust of the nitrogen production device when the refrigerator door is opened and then closed for a preset first time length and the refrigerator is in the refrigeration state includes the following steps:

[0097] The step S262 of controlling the molecular sieve tower exhaust of the nitrogen production device when the refrigerator door is opened and then closed for a preset first time length and the refrigerator is in the refrigeration state for a preset sixth time length.

[0098] This step ensures that the nitrogen production device produces nitrogen when the refrigerator is in the refrigeration state for a preset time length after the refrigerator door is opened and then closed for a preset first time length, and ensures that the nitrogen production device produces nitrogen when the air humidity in the refrigerator is less than the humidity threshold, so that the air humidity filled in the nitrogen production device does not affect the service life of the nitrogen production device, and the nitrogen production device can be combined with the environment of the refrigerator. The related nitrogen production control method solves the problem that the related nitrogen production control method for the refrigerator affects the service life of the nitrogen production device because it is not suitable for the environment of the refrigerator.

[0099] The present embodiment will be described and explained below through optional embodiments.

[0100] FIG. 3 is a flowchart of a nitrogen production control method according to an optional embodiment of the present application. As shown in FIG. 3, the nitrogen production control method includes the following steps:

[0101] The step S310 of monitoring the opening time and the closing time of the refrigerator door in real time in response to the received nitrogen production command;

[0102] The step S320 of detecting the refrigeration state of the refrigerator when the closing time of the refrigerator door reaches a preset first time length;

[0103] The step S330 of controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower of the nitrogen production device to open when the refrigerator door is closed for a preset first time length and the refrigerator is in the refrigeration state;

[0104] The step S340 of controlling the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower to close when the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for a preset second time length;

[0105] The step S350 of controlling the nitrogen production device to produce nitrogen after the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is closed.

[0106] The steps S310 to S350 are used to control the molecular sieve tower of the nitrogen generator to exhaust in response to the received nitrogen generation command when the refrigerator door is closed for a preset first length of time and the refrigerator is in a refrigeration state, and control the nitrogen generator to generate nitrogen after the exhaust of the molecular sieve tower of the nitrogen generator is completed. The nitrogen is generated when the refrigerator is in the refrigeration state, because the air humidity in the refrigerator is reduced, so that the air humidity obtained by the molecular sieve tower of the nitrogen generator is low, thereby solving the problem that the high humidity in the refrigerator and the high air humidity obtained by the molecular sieve tower affect the service life of the nitrogen generator. In addition, the exhaust of the molecular sieve tower is performed before the nitrogen generation, so that the nitrogen generator can be combined with the environment of the refrigerator, and the problem that the related nitrogen generation control method affects the service life of the nitrogen generator because it is not suitable for the environment of the refrigerator is solved.

[0107] It should be understood that, although each step in the flowchart involved in each embodiment as described above is shown in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or stages.

[0108] Based on the same inventive concept, in the present embodiment, a nitrogen generation control system is also provided, which is used to implement the above-mentioned embodiments and optional implementation manners, and will not be described again. The terms "module", "unit", "sub-unit" and the like used below can be a combination of software and / or hardware that implements a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware or a combination of software and hardware is also possible and contemplated.

[0109] In one embodiment, FIG. 4 is a structural block diagram of a nitrogen generation control system provided by an embodiment of the present application, as shown in FIG. 4, the nitrogen generation control system comprises:

[0110] The exhaust module 42 is used to control the molecular sieve tower of the nitrogen generator to exhaust in response to the received nitrogen generation command when the refrigerator door is closed for a preset first length of time and the refrigerator is in a refrigeration state;

[0111] And the nitrogen generation module 44 is used to control the nitrogen generator to generate nitrogen after the exhaust of the molecular sieve tower is completed.

[0112] The above nitrogen production control system controls the molecular sieve tower of the nitrogen production device to exhaust when the refrigerator door is closed for a preset first length of time and the refrigerator is in a refrigeration state in response to a received nitrogen production command, and controls the nitrogen production device to produce nitrogen after the molecular sieve tower of the nitrogen production device exhausts. The nitrogen is produced when the refrigerator is in the refrigeration state, because the air humidity in the refrigerator is reduced, so that the air humidity obtained by the molecular sieve tower of the nitrogen production device is low, thereby solving the problem that the high humidity in the refrigerator and the high air humidity obtained by the molecular sieve tower affect the service life of the nitrogen production device. In addition, the exhaust of the molecular sieve tower is performed before the nitrogen production, so that the nitrogen production device can be combined with the environment of the refrigerator, and the problem that the related nitrogen production control method affects the service life of the nitrogen production device because it is not suitable for the environment of the refrigerator is solved.

[0113] It should be noted that each of the above modules can be a functional module or a program module, and can be implemented by software or hardware. For the modules implemented by hardware, each of the above modules can be located in the same processor, or each of the above modules can be located in different processors in any combination.

[0114] In one embodiment, a refrigerator is provided, and Fig. 5 is a structural block diagram of the refrigerator provided in the embodiment of the application. As shown in Fig. 5, the refrigerator includes a refrigeration device 52, a nitrogen production device 54, and a processor 56 and a memory 58 connected with the refrigeration device 52 and the nitrogen production device 54.

[0115] The refrigeration device 52 is configured to refrigerate the refrigerator when the refrigerator is in a refrigeration state.

[0116] The nitrogen production device 54 is configured to produce nitrogen for the refrigerator.

[0117] The nitrogen production device 54 includes at least one molecular sieve tower, one air pump, and one electromagnetic valve. The molecular sieve tower is internally filled with nitrogen production molecular sieve, and is configured to convert received air into nitrogen and oxygen to produce nitrogen for the refrigerator. The air pump is configured to fill air into the molecular sieve tower. The electromagnetic valve is located at an oxygen exhaust end of the molecular sieve tower.

[0118] The memory 58 stores a computer program, and the processor 56 implements any one of the above-mentioned nitrogen production control methods when executing the computer program.

[0119] The embodiment realizes that the nitrogen production device can be combined with the environment of the refrigerator by the joint control of the nitrogen production device and the refrigeration device. The problem that the related nitrogen production control method affects the service life of the nitrogen production device because it is not suitable for the environment of the refrigerator is solved.

[0120] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetic resistive memory (Magneto resistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0121] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0122] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of controlling the production of nitrogen, characterized by, The application relates to a nitrogen production device applied to a refrigerator, and a method. In response to a received nitrogen production command, when a refrigerator door is closed for a preset first time length and the refrigerator is in a refrigeration state, a molecular sieve tower of the nitrogen production device is exhausted. After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen.

2. The method of claim 1, wherein, Before the molecular sieve tower of the nitrogen production device is exhausted in response to the received nitrogen production command, when the refrigerator door is closed for the preset first time length and the refrigerator is in the refrigeration state, the method further comprises the following steps. In response to the received nitrogen production command, the opening time and the closing time of the refrigerator door are monitored in real time. When the closing time of the refrigerator door reaches the preset first time length, the refrigeration state of the refrigerator is detected.

3. The method of claim 1, wherein, In response to the received nitrogen production command, when the refrigerator door is closed for the preset first time length and the refrigerator is in the refrigeration state, the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower of the nitrogen production device is controlled to be opened. When the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is opened for a preset second time length, the electromagnetic valve of the oxygen exhaust end of the molecular sieve tower is controlled to be closed. The method further comprises the following steps.

4. The method of claim 1, wherein, In response to a received first nitrogen production command, when the closing time of the refrigerator door reaches a preset third time length, the molecular sieve tower of the nitrogen production device is exhausted. After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen. After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen for a fourth time length, and then the refrigerator door is opened, so that the nitrogen production device is controlled to stop producing nitrogen; the fourth time length is less than a preset nitrogen production time length.

5. The method of claim 1, wherein, After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen for the fourth time length, and then the refrigerator door is opened, so that the nitrogen production device is controlled to stop producing nitrogen, and the method further comprises the following steps. When the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in the refrigeration state, the molecular sieve tower of the nitrogen production device is exhausted.

6. The method of claim 5, wherein, After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen for a preset fifth time length and then stop; the preset fifth time length is equal to a time difference between the preset nitrogen production time length and the fourth time length. After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen, and the method further comprises the following steps. In the case that the refrigerator door is continuously closed, the refrigerator is periodically produced with nitrogen at a preset time interval.

7. The method of controlling the production of nitrogen of claim 1, wherein, After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen, and the method further comprises the following steps. When the closing time of the refrigerator door reaches the preset first time length and the refrigerator is in the refrigeration state, the molecular sieve tower of the nitrogen production device is exhausted.

8. The method of claim 1, wherein, After the molecular sieve tower is exhausted, the nitrogen production device is controlled to produce nitrogen for a preset nitrogen production time length and then stop. ​ ​ 9. The method of claim 8, wherein, The method comprises the following steps: The method comprises the following steps:

10. A nitrogen production control system, characterized by, The system comprises: The system comprises: The system comprises:

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