Refrigerator and its control method

Abstract

This invention provides a refrigerator and its control method. The refrigerator includes a gas content detection device configured to detect the gas content of a target gas within the refrigerator's storage compartment. The control method includes: acquiring the gas content detection value of the target gas; acquiring an aging offset coefficient and a temperature compensation coefficient for the gas content detection value; correcting the gas content detection value based on the aging offset coefficient and the temperature compensation coefficient to obtain a corrected gas content value; determining whether the difference between the corrected gas content value and a set standard gas content value exceeds a first set threshold; and if so, driving the refrigerator to issue a first alert signal. By using the aging offset coefficient and the temperature compensation coefficient to correct the gas content detection value, the refrigerator can accurately monitor changes in gas content, thereby reducing or avoiding the influence of aging and temperature on the accuracy of the detection results, and improving the accuracy of the refrigerator's gas content monitoring process.

Description

Technical Field

[0001] This invention relates to refrigerators, and more particularly to refrigerators and methods for controlling them. Background Technology

[0002] A refrigerator creates a low-temperature environment to preserve perishable food. Although refrigerators can extend the shelf life of food, food can still lose freshness or even spoil if stored for too long.

[0003] Because changes in the freshness or spoilage of food can alter the concentration of certain gases inside a refrigerator, some existing technologies employ gas sensors to monitor the freshness and / or spoilage of food. However, in practical applications, these sensors often detect inaccuracies and are not accurate enough to reflect changes in gas levels within the refrigerator. Consequently, they fail to promptly alert users when spoiled food has already occurred, resulting in a poor user experience.

[0004] Therefore, how to accurately monitor changes in gas content inside a refrigerator has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One object of the present invention is to provide a refrigerator and its control method that at least solve one aspect of the above-mentioned technical problems.

[0006] A further objective of this invention is to accurately monitor changes in gas content inside a refrigerator, thereby improving the accuracy of gas content monitoring in the refrigerator.

[0007] Another further objective of this invention is to enable refrigerators to slow down the rate of food spoilage.

[0008] Another further objective of this invention is to utilize refrigerators to ensure food safety.

[0009] According to one aspect of the present invention, a control method for a refrigerator is provided, wherein a gas content detection device is provided inside the refrigerator, configured to detect the gas content of a gas to be tested in the storage compartment of the refrigerator; and the control method includes: acquiring a gas content detection value of the gas to be tested detected by the gas content detection device; acquiring an aging offset coefficient and a temperature compensation coefficient of the gas content detection value; correcting the gas content detection value according to the aging offset coefficient and the temperature compensation coefficient to obtain a corrected gas content value; determining whether the difference between the corrected gas content value and a set standard gas content value exceeds a first set threshold; if so, driving the refrigerator to issue a first prompt signal.

[0010] Optionally, the step of obtaining the aging offset coefficient of the gas content detection value includes: obtaining the cumulative usage time of the gas content detection device; and calculating the aging offset coefficient of the gas content detection value based on the cumulative usage time.

[0011] Optionally, the step of calculating the aging offset coefficient of the gas content detection value based on the cumulative usage time includes: obtaining a preset per-unit value of the aging offset coefficient and the expected working life of the gas content detection device; and calculating the aging offset coefficient based on the formula... Calculate the aging offset coefficient, where F1 is the aging offset coefficient, B0 is the per-unit value of the aging offset coefficient, t is the cumulative usage time, and t0 is the expected working life.

[0012] Optionally, the step of obtaining the temperature compensation coefficient for the gas content detection value includes: obtaining the actual temperature value of the storage room; and calculating the temperature compensation coefficient for the gas content detection value based on the actual temperature value.

[0013] Optionally, the step of calculating the temperature compensation coefficient of the gas content detection value based on the actual temperature value includes: obtaining a preset standard temperature value; and calculating the temperature compensation coefficient based on the formula. Calculate the temperature compensation coefficient, where F2 is the temperature compensation coefficient, k is a preset constant, T0 is the standard temperature value, and T is the actual temperature value.

[0014] Optionally, the step of calculating the gas content correction value based on the gas content detection value, temperature compensation coefficient, and aging offset coefficient includes: according to the formula Calculate the gas content correction value, where X f This is a correction value for gas content. F1 is the gas content detection value, F2 is the aging offset coefficient, F2 is the temperature compensation coefficient, and a is a preset constant.

[0015] Optionally, after the refrigerator issues the first warning signal, the method further includes: determining whether the difference between the gas content correction value and the gas content standard value exceeds a second set threshold; the second set threshold is greater than the first set threshold; if it exceeds the threshold, the refrigerator adjusts the first warning signal to the second warning signal.

[0016] Optionally, after the refrigerator issues the first warning signal, the method further includes: adjusting the refrigerator's operating status to regulate the content of the gas to be tested in the storage compartment.

[0017] Optionally, the steps for obtaining the gas content detection value of the gas to be tested include: driving the gas content detection device into the sampling stage; continuously collecting the gas content collection values ​​detected by the gas content detection device to obtain a gas content collection value sequence; and calculating the gas content detection value based on the gas content collection value sequence.

[0018] In particular, according to one aspect of the present invention, a refrigerator is provided, comprising: a gas content detection device configured to detect the gas content of a gas to be measured in the storage compartment of the refrigerator; and a control device comprising: a processor and a memory, the memory storing a control program, which, when executed by the processor, is used to implement the control method described above.

[0019] According to another aspect of the present invention, a refrigerator is also provided, comprising: a control device including: a processor and a memory, the memory storing a control program, which, when executed by the processor, is used to implement the control method according to any one of the above.

[0020] The refrigerator and its control method of the present invention include a gas content detection device installed inside the refrigerator for detecting the content of a gas to be tested in the storage compartment. When acquiring the gas content detection value of the gas to be tested, the device can also acquire an aging offset coefficient and a temperature compensation coefficient for the gas content detection value. The gas content detection value can be corrected based on the aging offset coefficient and the temperature compensation coefficient to obtain a corrected gas content value. This corrected gas content value can be compared with a set standard gas content value to determine whether the gas content of the gas to be tested exceeds a first set threshold. By correcting the gas content detection value using the aging offset coefficient and the temperature compensation coefficient, the device can accurately monitor changes in gas content inside the refrigerator, thereby reducing or avoiding the influence of aging degree and temperature on the accuracy of the detection results, and improving the accuracy of the refrigerator's gas content monitoring process.

[0021] Furthermore, the refrigerator and its control method of the present invention, after driving the refrigerator to issue a first prompt signal, can also drive the refrigerator to adjust its operating state to regulate the content of the gas to be tested in the storage compartment. When the freshness of the food to be tested is low and has not yet deteriorated, timely adjustment of the refrigerator's operating state can appropriately increase or decrease the content of the gas to be tested in the storage compartment, thereby inhibiting the decrease in freshness, slowing down the rate of food deterioration, and improving the refrigerator's preservation ability.

[0022] Furthermore, in the refrigerator and control method of the present invention, when the difference between the gas content correction value and the set gas content standard value exceeds a second set threshold, the refrigerator is driven to adjust the first prompt signal to a second prompt signal. The magnitude of the difference between the gas content correction value and the gas content standard value can reflect whether the food has spoiled and the degree of spoilage. In the case of food spoilage, the second prompt signal reminds the user to take appropriate handling measures, which can prevent the user from accidentally eating spoiled food and ensure food safety.

[0023] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0024] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0025] Figure 1 This is a schematic diagram of a refrigerator according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic block diagram of a refrigerator according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of a refrigerator control method according to an embodiment of the present invention;

[0028] Figure 4 This is a flowchart of a refrigerator control method according to an embodiment of the present invention. Detailed Implementation

[0029] Figure 1 This is a schematic diagram of a refrigerator 10 according to an embodiment of the present invention. Figure 2 This is a schematic block diagram of a refrigerator 10 according to an embodiment of the present invention.

[0030] Refrigerator 10 generally includes: a cabinet 110, a refrigeration system disposed within the cabinet 110, a gas content detection device 300, and a control device 400. The cabinet 110 has at least one storage compartment 111 inside. The number and temperature zones of the storage compartments 111 can be arbitrarily set. In this embodiment, only the case where there is one storage compartment 111, and that storage compartment 111 is a refrigerator compartment, is illustrated. Those skilled in the art, based on their understanding of this embodiment, should be fully capable of making extensions, which will not be shown in detail here.

[0031] The refrigeration system can be a compression refrigeration system. A compression refrigeration system may include a compressor, a condenser, a throttling device, and an evaporator. A refrigeration chamber for installing the evaporator may also be formed within the cabinet 110. The refrigeration chamber may be located at the back, top, side, or bottom of the storage compartment 111. When the compressor is running, the refrigerant releases heat and condenses as it flows through the condenser, and absorbs heat and evaporates as it flows through the evaporator. The compression refrigeration system utilizes the phase change of the refrigerant during heat absorption in the evaporator to cool the storage compartment 111. The evaporator can cool the storage compartment 111 using either direct cooling or air cooling. The refrigerator 10 allows the user to set the cooling temperature.

[0032] A gas content detection device 300 is installed inside the refrigerator 10, configured to detect the gas content of a target gas in the storage compartment 111 of the refrigerator 10. The gas content detection device 300 can be installed inside the storage compartment 111. The target gas can include any combination of the following gases: carbon dioxide, ammonia, hydrogen sulfide, ethylene, ethanol, oxygen, and water vapor. There can be multiple gas content detection devices 300; for example, their number can be the same as the number of types of target gases, with each gas content detection device 300 used to detect the gas content of one type of target gas. Alternatively, there can be a single gas content detection device 300, which has multiple different detection units for detecting the aforementioned multiple target gases.

[0033] In some alternative embodiments, the refrigerator 10 may further include a temperature sensor disposed within the storage compartment 111 and configured to detect the temperature within the storage compartment 111.

[0034] The control device 400 includes a memory 420 and a processor 410. The memory 420 stores a control program 421, which, when executed by the processor 410, implements the control method of the refrigerator 10 according to any of the following embodiments. The processor 410 may be a central processing unit (CPU), a digital processing unit (DSP), etc. The memory 420 stores the program executed by the processor 410. The memory 420 may be any medium capable of carrying or storing desired program code in the form of instructions or data structures, and accessible by a computer, but is not limited thereto. The memory 420 may also be a combination of various types of memories 420. Since the control program 421, when executed by the processor 410, implements the various processes of the following method embodiments and achieves the same technical effects, it will not be described again here to avoid repetition.

[0035] Figure 3 This is a schematic diagram of a control method for a refrigerator 10 according to an embodiment of the present invention. The control method generally includes:

[0036] Step S302: Obtain the gas content detection value of the gas to be tested detected by the gas content detection device 300.

[0037] In this embodiment, the gas content detection device 300 can start operating after receiving a start signal and detect the gas content of the gas to be tested. The refrigerator 10 can send a start signal to the gas content detection device 300 if the door remains closed for a set time. The set time can be preset according to actual needs, for example, it can be any value in the range of 5 to 30 minutes.

[0038] The steps for obtaining the gas content detection value of the gas to be tested include: driving the gas content detection device 300 into the sampling stage, continuously collecting the gas content collection values ​​detected by the gas content detection device 300 to obtain a gas content collection value sequence, and calculating the gas content detection value based on the gas content collection value sequence. The number of gas content collection values ​​can be preset according to actual needs and can be any value in the range of 3 to 10, for example, three, four, five, six, or ten. Preferably, the number of gas content collection values ​​can be four.

[0039] The steps to obtain the gas content collection value sequence include: determining whether a door opening / closing event occurred in the refrigerator 10 during the sampling phase; if so, determining whether the gas content collection value detected by the gas content detection device 300 after the door opening / closing event is an abnormal value; if it is an abnormal value, then not recording the abnormal value in the gas collection value sequence.

[0040] The step of determining whether the gas content collection value detected by the gas content detection device 300 after the door opening / closing event is an abnormal value includes: obtaining the difference between the gas content collection value detected by the gas content detection device 300 after the door opening / closing event and the last gas content collection value detected by the gas content detection device 300 before the door opening / closing event; calculating the ratio between the difference and the last gas content collection value detected by the gas content detection device 300 before the door opening / closing event; and determining whether the ratio exceeds a fourth preset threshold. If it exceeds the threshold, the gas content collection value detected by the gas content detection device 300 after the door opening / closing event is determined to be an abnormal value. The methods for determining the occurrence and termination of a door opening / closing event are well known to those skilled in the art and will not be described in detail here.

[0041] For example, the gas content collection value detected by the gas content detection device 300 after the door opening and closing event can be used to determine whether it is an abnormal value based on the calculation result of formula (1):

[0042]

[0043] In the formula, X i+1 This indicates the gas content collected by the gas content detection device 300 after the door opening / closing event, X. i This represents the last gas content value detected by the gas content detection device 300 before the door opening / closing event, in m×t. s This indicates the fourth threshold value. The fourth threshold value can be set based on m and t. s The value of t is calculated. Here, m is a preset constant, which can be any value within the range of 0.5 to 2, for example, 0.5, 1, 1.5, or 2. s For the preset data collection time interval, the gas content detection device 300 collects data every t...s A gas concentration value is collected over time. t s It can be any value within the range of 0.1 to 5 seconds, for example, it can be 0.1s, 0.5s, 1s, 2s, 3s, 4s, or 5s. In this embodiment, m can be 0.5, and t... s It can be 0.5s.

[0044] The step of calculating the gas content detection value based on the gas content collection value sequence may include: calculating the arithmetic mean of the gas content collection values ​​in the gas content collection value sequence as the gas content detection value. In some alternative embodiments, the median, maximum, or minimum value of the gas content collection values ​​in the gas content collection value sequence may also be calculated as the gas content detection value.

[0045] For example, the gas content detection value can be calculated according to formula (2):

[0046]

[0047] In the formula, This represents the gas content detection value, (X1+…+X n ) represents the sum of all gas content collection values ​​in the gas content collection value sequence, and N represents the number of gas content collection values ​​in the gas content collection value sequence.

[0048] In some optional embodiments, when it is determined that the gas content collection value detected by the gas content detection device 300 after the door opening and closing event is an abnormal value, the gas content collection value last detected by the gas content detection device 300 before the door opening and closing event can be used to replace the abnormal value and recorded in the gas content collection value sequence.

[0049] Step S304: Obtain the aging offset coefficient and temperature compensation coefficient of the gas content detection value.

[0050] As the usage time increases, the gas content detection device 300 will experience output drift. This embodiment corrects the deviation of the detected value by setting an aging offset coefficient. Due to the aging of its own structure, the gas content detection device 300 causes the detected value to deviate from the detected value detected by a gas content detection device 300 without structural changes. For example, the detected value may be larger than expected. The degree of deviation is called the aging offset coefficient. The gas content detection device 300 without structural changes can be a brand new gas content detection device 300.

[0051] The detection value of the gas content detection device 300 is also affected by the temperature of the environment in which the gas content detection device 300 is located. This causes the detection value detected by the gas content detection device 300 to deviate from the detection value detected by the gas content detection device 300 in a standard temperature environment. The degree of deviation is called the temperature compensation coefficient. When the temperature decreases, the gas diffusion rate decreases, and the detection value of the gas content detection device 300 is lower.

[0052] The steps for obtaining the aging offset coefficient of the gas content detection value include: obtaining the cumulative usage time of the gas content detection device 300, and calculating the aging offset coefficient of the gas content detection value based on the cumulative usage time. The cumulative usage time refers to the cumulative operating time of the gas content detection device 300 in operation.

[0053] The steps for calculating the aging offset coefficient of the gas content detection value based on the cumulative usage time include: obtaining the preset per-unit value of the aging offset coefficient and the expected working life of the gas content detection device 300, and calculating the aging offset coefficient according to formula (3).

[0054]

[0055] In the formula, F1 is the aging offset coefficient, B0 is the per-unit value of the aging offset coefficient, t is the cumulative usage time, and t0 is the expected working life. The per-unit value of the aging offset coefficient refers to a pre-set relative or baseline value of the aging offset coefficient. The per-unit value of the aging offset coefficient can be set according to the performance parameters of different types of gas content detection devices 300. Generally, the per-unit value of the aging offset coefficient can be any value within the range of 0.01% to 0.05%, for example, 0.01%, 0.02%, 0.03%, 0.04%, or 0.05%. The expected working life of the gas content detection device 300 refers to the longest working time of the gas content detection device 300 under normal operating conditions, which is determined by the performance parameters of the gas content detection device 300. Generally, the expected working life of the gas content detection device 300 can be 1 year, 2 years, or 3 years.

[0056] The steps for obtaining the temperature compensation coefficient for the gas content detection value include: obtaining the actual temperature value of storage chamber 111, and calculating the temperature compensation coefficient for the gas content detection value based on the actual temperature value. The actual temperature value refers to the temperature value inside storage chamber 111 when the gas content detection device 300 is operating. The temperature sensor can be started synchronously when the gas content detection device 300 is started, detecting the temperature value inside storage chamber 111.

[0057] As shown by Maxwell's gas molecule velocity distribution function, temperature and gas molecule velocity are positively correlated. This embodiment uses Maxwell's formula for calculating the average gas molecule velocity to determine the method for calculating the temperature compensation coefficient.

[0058] The steps for calculating the temperature compensation coefficient of the gas content detection value based on the actual temperature value include: obtaining the preset standard temperature value and calculating the temperature compensation coefficient according to formula (4).

[0059]

[0060] In the formula, F2 is the temperature compensation coefficient, k is a preset constant, T0 is the standard temperature value, and T is the actual temperature value. The standard temperature value refers to the calibration temperature of the gas content detection device 300, where the gas content detection value detected by the gas content detection device 300 under the standard temperature condition is not deviated from by the temperature. In this embodiment, the standard temperature value can be any value within the range of 5 to 10℃, for example, 5℃, 8℃, or 10℃. Preferably, it can be 10℃. k can be any value within the range of 0.3 to 1.3, for example, 0.3, 0.5, 0.8, 1, 1.2, or 1.3, preferably, it can be 1.

[0061] Step S306: Correct the gas content detection value according to the aging offset coefficient and the temperature compensation coefficient to obtain the corrected gas content value.

[0062] The steps for calculating the gas content correction value based on the gas content detection value, temperature compensation coefficient, and aging offset coefficient include: calculating the gas content correction value according to formula (5).

[0063]

[0064] In the formula, X f This is a correction value for gas content. F1 is the gas content detection value, F2 is the aging offset coefficient, F2 is the temperature compensation coefficient, and a is a preset constant, which can be any value in the range of 0.5 to 1.5. For example, a can be 0.5, 0.8, 1, 1.2 or 1.5, and preferably, it can be 1.

[0065] Step S308: Determine whether the difference between the gas content correction value and the set gas content standard value exceeds a first set threshold. If so, drive the refrigerator 10 to issue a first prompt signal. If the difference between the gas content correction value and the set gas content standard value does not exceed the first set threshold, return to step S302.

[0066] That is, if the difference between the gas content correction value and the gas content standard value exceeds the first set threshold, the refrigerator 10 will issue a first warning signal.

[0067] The difference between the gas content correction value and the set gas content standard value refers to the absolute value of the difference.

[0068] The standard value for gas content can be set based on the correspondence between the freshness and / or spoilage degree of the food and the gas content of the gas to be tested. For example, under standard temperature test conditions, the gas content of the food to be tested in storage room 111 can be collected in advance, and the corresponding freshness and / or spoilage degree of the food to be tested can be recorded to establish a correspondence table. The standard value for gas content can be the gas content of the food to be tested when the freshness of the food to be tested drops to 50% but no spoilage occurs. The first set threshold can be p times the standard value for gas content. Wherein, p is a preset constant, which can be any value in the range of [0.5%, 1.5%].

[0069] The first prompt signal can be a voice prompt signal, such as a preset "beep beep beep" or "ding ding ding" sound, or a voice command such as "Please consume ingredient A in time," where A represents the name of the ingredient to be tested. In some alternative embodiments, the first prompt signal can also be a display signal from the screen, or a light signal from an indicator light, but is not limited to these.

[0070] When the freshness of the food being tested is low but has not yet deteriorated, the food is still usable. The first warning signal can remind the user to eat the food in time to avoid waste due to spoilage caused by prolonged storage. This improves the intelligence level of the refrigerator 10 and helps to optimize the storage and management of food.

[0071] After the refrigerator 10 issues the first warning signal, the process also includes: adjusting the refrigerator 10's operating status to regulate the content of the gas to be tested in the storage compartment 111. When the freshness of the food to be tested is low but has not yet deteriorated, timely adjustment of the refrigerator 10's operating status can appropriately increase or decrease the content of the gas to be tested in the storage compartment 111, thereby inhibiting further reduction in freshness, slowing down the rate of food deterioration, and improving the refrigerator 10's preservation ability.

[0072] The refrigerator 10 in this embodiment is particularly able to meet the needs of families with a limited variety of food storage.

[0073] The type and quantity of the gas to be tested can be determined based on the gases consumed or generated during the process of freshness reduction and / or spoilage of the food being tested. If the food being tested consumes gas one and generates gas two during the process of freshness reduction and / or spoilage, the storage condition of the food being tested can be reflected by monitoring the degree of decrease in the content of gas one and / or the degree of increase in the content of gas two.

[0074] For example, if the food to be tested is fruits and vegetables, and the gas to be tested is ethylene, the ethylene produced by the fruits and vegetables themselves promotes ripening. When the ethylene content is too high, it easily accelerates the ripening of fruits and vegetables, which is not conducive to extending the shelf life. Therefore, by installing an ethylene removal module in the refrigerator 10, when the difference between the gas content correction value and the gas content standard value of the gas to be tested exceeds a first set threshold, and the refrigerator 10 is driven to issue a first prompt signal, the steps to adjust the operating state of the refrigerator 10 may include: driving the refrigerator 10 to start the ethylene removal module and / or lowering the cooling temperature of the refrigerator 10 to reduce the ethylene content in the storage compartment 111, inhibit the ripening process of fruits and vegetables, and thus extend the shelf life.

[0075] If the food to be tested is fruits and vegetables and the gas to be tested is carbon dioxide, the steps to adjust the operating status of the refrigerator 10 may include: driving the refrigerator 10 to start the deoxygenation module and / or lowering the refrigerator's cooling temperature to reduce the oxygen content in the storage compartment 111, inhibiting the respiration of fruits and vegetables, and adjusting the carbon dioxide content by reducing the carbon dioxide generation rate in the storage compartment 111.

[0076] If the food to be tested is meat or eggs, the gas to be tested is ammonia. Ammonia is generated during the protein decomposition process in meat and eggs. Therefore, when the ammonia content is too high, the steps to adjust the operation of the refrigerator 10 may include: driving the refrigerator 10 to lower the cooling temperature to lower the temperature inside the storage compartment 111, thereby regulating the ammonia content by reducing the protein decomposition rate and slowing down the spoilage process.

[0077] After the refrigerator emits the first warning signal, the cooling temperature of the refrigerator 10 can be reduced by 0.3°C.

[0078] After the refrigerator 10 issues the first prompt signal, the process further includes: determining whether the difference between the gas content correction value and the set gas content standard value exceeds a second set threshold. If the second set threshold is greater than the first set threshold, and if it does, the refrigerator 10 adjusts the first prompt signal to the second prompt signal. If the difference between the gas content correction value and the set gas content standard value exceeds the second set threshold, it indicates that the food being tested has begun to spoil. The second set threshold can be q times the gas content standard value. Here, q is a preset constant, for example, any value within the range of (1.5%, 3%). The second prompt signal can be a voice command such as "Please check food A promptly," or other voice prompt signals, screen display signals, light signals, etc.

[0079] The difference between the gas content correction value and the set gas content standard value can reflect the freshness of the food and the degree of spoilage. In the event of spoilage, a second prompt signal will remind the user to check the food and take appropriate measures, thereby preventing the user from accidentally eating spoiled food and ensuring food safety.

[0080] After the refrigerator emits the second alert signal, the cooling temperature of the refrigerator 10 can be reduced by 0.6°C.

[0081] After the refrigerator 10 issues the first prompt signal, the process further includes: determining whether the difference between the gas content correction value and the set gas content standard value exceeds a third set threshold. If the third set threshold is greater than the second set threshold, and if it does, the refrigerator 10 adjusts the first prompt signal to the third prompt signal. If the difference between the gas content correction value and the set gas content standard value exceeds the third set threshold, it indicates that the food being tested has severely spoiled. The third set threshold can be h times the gas content standard value. Here, h is a preset constant, for example, any value within the range of (3%, +∞). The third prompt signal can be a voice command such as "Please discard food A immediately," or other voice prompt signals, screen display signals, light signals, etc.

[0082] In cases where food has severely spoiled, a third-party alert signal can remind users to discard the spoiled food promptly, thus preventing it from contaminating the storage environment.

[0083] After the refrigerator sends out the third prompt signal, the cooling temperature of the refrigerator 10 can be reduced by 1°C.

[0084] In some alternative embodiments, the deviation between the gas content correction value and the gas content standard value can also be calculated according to formula (6).

[0085]

[0086] In the formula, X f X represents the gas content correction value. g The value represents the standard value of the gas content, and the offset represents the deviation. If the offset value is within the range of [0.5%, 1.5%], the refrigerator 10 will issue a first warning signal. If the offset value is within the range of (1.5%, 3%), the refrigerator 10 will adjust the first warning signal to a second warning signal. If the offset value is within the range of (3%, +∞), the refrigerator 10 will adjust the first warning signal to a third warning signal.

[0087] Figure 4 This is a flowchart of a control method for a refrigerator 10 according to an embodiment of the present invention.

[0088] Step S402: Obtain the gas content detection value of the gas to be tested, the cumulative usage time of the gas content detection device 300, and the actual temperature value of the storage room 111.

[0089] Step S404: Calculate the aging offset coefficient of the gas content detection value based on the cumulative usage time. This step includes: obtaining a preset per-unit value for the aging offset coefficient and the expected working life of the gas content detection device 300, and then calculating the aging offset coefficient based on the formula... Calculate the aging offset coefficient, where F1 is the aging offset coefficient, B0 is the per-unit value of the aging offset coefficient, t is the cumulative usage time, and t0 is the expected working life.

[0090] Step S406: Calculate the temperature compensation coefficient for the gas content detection value based on the actual temperature value. This step includes: obtaining a preset standard temperature value, and then calculating the temperature compensation coefficient based on the formula... Calculate the temperature compensation coefficient, where F2 is the temperature compensation coefficient, k is a preset constant, T0 is the standard temperature value, and T is the actual temperature value.

[0091] Step S408: Correct the gas content detection value based on the aging offset coefficient and the temperature compensation coefficient to obtain the corrected gas content value. The steps for calculating the corrected gas content value based on the gas content detection value, the temperature compensation coefficient, and the aging offset coefficient include: according to the formula... Calculate the gas content correction value, where X f This is a correction value for gas content. F1 is the gas content detection value, F2 is the aging offset coefficient, F2 is the temperature compensation coefficient, and a is a preset constant.

[0092] Step S410: Determine whether the difference between the gas content correction value and the set gas content standard value exceeds the first set threshold. If yes, proceed to step S412; otherwise, return to step S402.

[0093] In step S412, the refrigerator 10 is driven to issue a first prompt signal.

[0094] In step S414, the refrigerator 10 is driven to adjust its operating status to regulate the content of the gas to be tested in the storage compartment 111.

[0095] Using the above method, the refrigerator 10 of this embodiment, after acquiring the gas content detection value of the gas to be tested, can correct the gas content detection value according to the aging offset coefficient and the temperature compensation coefficient to obtain a corrected gas content value. This corrected gas content value is then compared with a set standard gas content value to determine whether the gas content of the gas to be tested exceeds a first set threshold. Correcting the gas content detection value using the aging offset coefficient and the temperature compensation coefficient reduces or avoids the influence of aging degree and temperature on the accuracy of the detection results, improving the monitoring accuracy of the refrigerator 10 in the gas content monitoring process. The method of this embodiment can be applied not only to ordinary refrigerators but also to smart refrigerators.

[0096] Actual measurements revealed that using the method described in this embodiment to correct gas content detection values ​​can improve detection accuracy by 10% to 50% compared to not using this method.

[0097] The inventors tested multiple gas content detection devices with different cumulative usage times at multiple different detection temperatures, and verified that the positioning results using the method of this embodiment have greatly improved accuracy.

[0098] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A method for controlling a refrigerator, wherein, The refrigerator is equipped with a gas content detection device configured to detect the gas content of the gas to be tested in the storage compartment of the refrigerator; and the control method includes: Obtain the gas content detection value of the gas to be tested detected by the gas content detection device; Obtain the aging offset coefficient and temperature compensation coefficient of the gas content detection value; The gas content detection value is corrected based on the aging offset coefficient and the temperature compensation coefficient to obtain the corrected gas content value; Determine whether the difference between the gas content correction value and the set gas content standard value exceeds a first set threshold. If so, the refrigerator will issue a first notification signal; wherein, The steps for obtaining the temperature compensation coefficient of the gas content detection value include: Obtain the actual temperature value of the storage room; Obtain the preset standard temperature value; According to the formula Calculate the temperature compensation coefficient, where F2 is the temperature compensation coefficient, k is a preset constant, T0 is the standard temperature value, and T is the actual temperature value; The step of calculating the gas content correction value based on the gas content detection value, the temperature compensation coefficient, and the aging offset coefficient includes: According to the formula Calculate the gas content correction value, where X f This is the correction value for the gas content. The gas content detection value is denoted as F1, the aging offset coefficient is denoted as F2, the temperature compensation coefficient is denoted as a, and a is a preset constant.

2. The control method according to claim 1, wherein, The step of obtaining the aging offset coefficient of the gas content detection value includes: Obtain the cumulative usage time of the gas content detection device; The aging offset coefficient of the gas content detection value is calculated based on the cumulative usage time.

3. The control method according to claim 2, wherein, The step of calculating the aging offset coefficient of the gas content detection value based on the cumulative usage time includes: Obtain the preset per-unit value of the aging offset coefficient and the expected working life of the gas content detection device; According to the formula Calculate the aging offset coefficient, where F1 is the aging offset coefficient, B0 is the per-unit value of the aging offset coefficient, t is the cumulative usage time, and t0 is the expected working life.

4. The control method according to claim 1, wherein, After the refrigerator is driven to issue the first alert signal, the following is also included: Determine whether the difference between the gas content correction value and the gas content standard value exceeds a second preset threshold; the second preset threshold is greater than the first preset threshold. If the signal exceeds the limit, the refrigerator will adjust the first alert signal to a second alert signal.

5. The control method according to claim 1, wherein, After the refrigerator is driven to issue the first alert signal, the method further includes: The refrigerator is driven to adjust its operating status in order to regulate the content of the gas to be tested in the storage compartment.

6. The control method according to claim 1, wherein, The step of obtaining the gas content detection value of the gas to be tested includes: Drive the gas content detection device into the sampling stage; The gas content detection device continuously collects the gas content values ​​to obtain a gas content collection value sequence; The gas content detection value is calculated based on the gas content collection value sequence.

7. A refrigerator, comprising: A gas content detection device is configured to detect the gas content of the gas to be tested in the storage compartment of the refrigerator; A control device includes a processor and a memory, wherein the memory stores a control program, which, when executed by the processor, is used to implement the control method according to any one of claims 1-6.

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