WO2017206557A1 - 用于冷藏冷冻设备的制氮控制方法以及冷藏冷冻设备 - Google Patents

用于冷藏冷冻设备的制氮控制方法以及冷藏冷冻设备 Download PDF

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Publication number
WO2017206557A1
WO2017206557A1 PCT/CN2017/074607 CN2017074607W WO2017206557A1 WO 2017206557 A1 WO2017206557 A1 WO 2017206557A1 CN 2017074607 W CN2017074607 W CN 2017074607W WO 2017206557 A1 WO2017206557 A1 WO 2017206557A1
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Prior art keywords
nitrogen
sealed space
opening
refrigerating
sealed
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PCT/CN2017/074607
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English (en)
French (fr)
Inventor
娄喜才
王铭
何胜涛
刘昀曦
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青岛海尔股份有限公司
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Publication of WO2017206557A1 publication Critical patent/WO2017206557A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
    • A23L3/3409—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23L3/3418—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/006—Safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/02—Timing

Definitions

  • the invention relates to the field of article storage, in particular to a nitrogen control method for a refrigerating and freezing device and a refrigerating and freezing device.
  • the nitrogen production unit of the current refrigerating and freezing equipment prepares nitrogen according to a preset mode, for example, starting nitrogen production after the door body is closed and continuously maintaining a running time, and the nitrogen generator continuously performs nitrogen production during a fixed nitrogen production time.
  • the nitrogen concentration in the chamber is raised to the target concentration.
  • the nitrogen production time set by experience is often not accurate enough. If the nitrogen production time is too long, energy waste will be caused. If the nitrogen production time is insufficient, the nitrogen concentration inside the compartment cannot reach the preset requirement.
  • a nitrogen sensor is installed in the sealed room to control the device cost, and the transmission cable required for data transmission of the nitrogen sensor also seals the compartment. Sex has a certain impact.
  • the present invention has been made in order to provide a nitrogen control method and a refrigerating and freezing apparatus for a refrigerating and freezing apparatus that overcome the above problems or at least partially solve the above problems.
  • a further object of the present invention is to make the nitrogen concentration in the sealed space of the refrigerating and freezing apparatus meet the freshness preservation requirements.
  • Another further object of the present invention is to accurately determine the length of operation of the nitrogen plant of a refrigerating and freezing apparatus.
  • the present invention provides a nitrogen control method for a refrigerating and freezing apparatus in which a storage compartment is provided with a sealed space, and the refrigerating and freezing apparatus is provided with a nitrogen gas for supplying a sealed space.
  • a nitrogen generating device and the control method comprises: detecting a trigger signal for opening and closing the sealed space; determining, after the sealed space is opened, detecting the size of the opening in which the sealed space is opened and the opening duration of the sealed space according to the trigger signal; according to the opening size and the opening duration Time
  • the nitrogen generating device is determined to increase the nitrogen concentration of the sealed space to the nitrogen production time required for the preset concentration; after the sealed space is closed, the nitrogen regulating device is controlled to supply nitrogen to the sealed space according to the nitrogen production time.
  • the interior of the storage compartment is provided with a sealed drawer, and the sealed drawer defines a sealed space; and the step of detecting a trigger signal for opening and closing the sealed space comprises: detecting a signal of opening and closing the sealed drawer as a trigger signal; and detecting The step of opening the size of the opening of the sealed space includes detecting the length at which the sealed drawer is pulled out to determine the size of the opening according to the length.
  • the step of determining the nitrogen production time according to the opening size and the opening duration comprises: querying a preset nitrogen production time relationship table according to the opening size and the opening duration to obtain a nitrogen production time, and the nitrogen production time relationship table is recorded in advance. Through testing, different opening sizes and nitrogening times corresponding to the opening duration were obtained.
  • no trigger signal is detected during the first predetermined time period in which the nitrogen generating device ends the nitrogen production, and the nitrogen generating device is turned on for a second predetermined time to supplement the nitrogen leaking naturally in the sealed space.
  • the process of controlling the nitrogen generator to supply nitrogen to the sealed space according to the nitrogen production time further comprises: detecting an operating temperature of the nitrogen generating device, and determining whether the working temperature is greater than a preset temperature; if so, controlling the nitrogen generating device to intermittently work.
  • a refrigerating and freezing apparatus having a storage compartment having a sealed space inside the storage compartment, and the refrigerating and freezing apparatus further comprising: a nitrogen generating device configured to Providing nitrogen gas to the sealed space; triggering detecting means configured to detect a trigger signal for opening and closing the sealed space; and the opening detecting means configured to determine, according to the trigger signal, the opening size of the sealed space after the sealed space is opened; the timing device, the configuration After determining that the sealed space is opened according to the trigger signal, recording the opening duration of the sealed space; the nitrogen generating device is further configured to determine, according to the opening size and the opening duration, that the nitrogen generating device needs to increase the nitrogen concentration of the sealed space to a preset concentration Nitrogen production time, and after the sealed space is closed, nitrogen is supplied to the sealed space according to the nitrogen production time.
  • the refrigerating and freezing apparatus further includes: a sealed drawer disposed inside the storage compartment, the sealed space is defined by the sealed drawer; and a displacement sensor configured to detect a length of the sealed drawer being pulled out to determine the opening according to the length size.
  • the nitrogen generator is further configured to query a preset nitrogen production time relationship table according to the opening size and the opening duration to obtain a nitrogen production time, and the nitrogen production time relationship table records different opening sizes obtained by testing in advance. And the respective nitrogen production time of the opening duration.
  • the nitrogen generating device is further configured to not detect the touch within the first preset time of ending the nitrogen production.
  • the second predetermined time is turned on and continued to work to supplement the nitrogen leaking naturally in the sealed space.
  • the above refrigerating and freezing apparatus further comprises: a temperature sensor configured to detect an operating temperature of the nitrogen generating device; and the nitrogen generating device further configured to, in the process of controlling the nitrogen generating device to supply nitrogen to the sealed space according to the nitrogen production time, Intermittent operation is detected when the operating temperature is greater than the preset temperature.
  • the present invention provides a nitrogen control method for a refrigerating and freezing apparatus in which a storage space is provided inside a storage compartment of a refrigerating and freezing apparatus, and a refrigerating and freezing apparatus is provided with a nitrogen generating apparatus for supplying nitrogen to a sealed space, and a control method Determining the nitrogen production time required by the nitrogen generator to increase the nitrogen concentration of the sealed space to a preset concentration according to the size of the opening in which the sealed space is opened and the opening duration of the sealed space, and after the sealed space is closed, controlling the nitrogen generating device according to The nitrogen production time supplies nitrogen to the sealed space.
  • the refrigerating and freezing device of the present invention determines the nitrogen production time of the nitrogen generator according to the opening size of the sealed space and the opening duration.
  • the nitrogen generating device according to the nitrogen production time Nitrogen is supplied to the sealed space to supplement the leaked portion of the nitrogen so that the nitrogen in the sealed space is always within the range of the nitrogen concentration that satisfies the freshness requirements.
  • control method of the present invention queries the preset nitrogen production time relationship table according to the opening size and the opening duration to obtain the nitrogen production time, and the nitrogen production time relationship table records that different opening sizes and opening durations are obtained through testing in advance.
  • the time corresponds to the nitrogen production time.
  • the control method of the present invention determines the nitrogen production time by means of a look-up table, so that the determined nitrogen production time is more accurate.
  • FIG. 1 is a schematic view of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • FIG. 2 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • Figure 3 is a schematic block diagram of a refrigerating and freezing apparatus in accordance with another embodiment of the present invention.
  • FIG. 4 is a schematic view of a nitrogen production control method of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • FIG. 5 is a flow chart of a nitrogen control method of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • FIG. 6 is a flow chart of a nitrogen control method of a refrigerating and freezing apparatus according to another embodiment of the present invention.
  • FIG. 1 is a schematic view of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • Fig. 2 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention.
  • the refrigerating and freezing device may be a refrigerator, a freezer, or the like.
  • the refrigerating and freezing apparatus of the present embodiment has a storage compartment, and the inside of the storage compartment is provided with a sealed space 100.
  • a sealed box 110 is disposed in the storage compartment, and the sealed space 100 can be defined by the sealed box 110.
  • the sealed space 100 may also be defined by a sealed drawer, a sealed can, a sealed box, or the like.
  • the refrigerating and freezing apparatus of the present embodiment includes a nitrogen generator 200, a trigger detecting device 300, an opening detecting device 400, and a timing device 500.
  • the nitrogen generator 200 supplies nitrogen to the sealed space 100.
  • the nitrogen generator 200 of the present embodiment can remove oxygen from the air to produce pure nitrogen by utilizing the PSA nitrogen production method.
  • Pressure swing adsorption PSA Pressure Swing Adsorption specifically refers to pressurizing the mixed gas under the condition of constant temperature, and adsorbing excess impurity gas by the adsorbent to obtain a relatively pure single gas, and then using reduced pressure (pumping)
  • the method of vacuum or atmospheric pressure desorbs the impurity gas in the adsorbent for secondary utilization of the adsorbent.
  • the nitrogen generator 200 of the present embodiment may include an air compressor and a nitrogen-oxygen separator, and the air compressor supplies compressed air to the nitrogen-oxygen separator.
  • the oxygen adsorbent is disposed inside the nitrogen-oxygen separator, and the nitrogen-oxygen separator uses compressed air as a raw material, and uses pressure swing adsorption technology to selectively adsorb oxygen and nitrogen by the adsorbent to realize separation of nitrogen and oxygen in the air, thereby producing Pure nitrogen is produced.
  • the trigger detecting device 300 detects a trigger signal for opening and closing the sealed space 100.
  • the opening detecting device 400 determines, based on the trigger signal, the size of the opening in which the sealed space 100 is opened after the sealed space 100 is opened.
  • the timing device 500 determines the opening duration of the sealed space 100 after the sealed space 100 is opened based on the trigger signal.
  • the nitrogen generator 200 is configured to determine the nitrogen production time required for the nitrogen generator 200 to increase the nitrogen concentration of the sealed space 100 to a preset concentration according to the opening size and the opening duration, and after the sealed space 100 is closed, according to nitrogen production. Time provides nitrogen to the sealed space 100.
  • the above preset concentration can be set according to the nitrogen concentration that satisfies the food freshness requirement.
  • the refrigerating and freezing apparatus of the present embodiment determines the time required for the nitrogen generating apparatus 200 to produce nitrogen to the sealed space 100 in accordance with the opening size of the user to open the sealed space 100 and the opening duration to ensure that the nitrogen in the sealed space 100 is kept sufficient.
  • the inventors have found through experiments that the nitrogen leakage amount of the sealed space 100 is mainly related to the opening size of the user opening the sealed space 100 and the duration of opening the sealed space 100. Therefore, the nitrogen production time is also the opening size of the user opening the sealed space 100. And the duration of opening the sealed space 100 is related. Specifically, the larger the opening, the longer the opening duration, and the more nitrogen leakage, the longer the required nitrogen production time.
  • the refrigerating and freezing apparatus of the present embodiment includes a sealed drawer 120, a nitrogen generator 200, a trigger detecting device 300, a displacement sensor 400, and a timing device 500.
  • the sealed drawer 120 is disposed inside the storage compartment, and the sealed space is defined by the sealed drawer 120.
  • the trigger detecting device 300 detects a signal that the sealed drawer 120 is opened and closed as a trigger signal that the sealed space 100 is opened.
  • the displacement sensor 400 detects the length at which the sealed drawer 120 is pulled out to determine the size of the opening according to the length, and the opening size may be an opening area, an opening area ratio, or the like.
  • the displacement sensor 400 detects that the length of the sealed drawer 120 is 10 cm, and the width of the sealed drawer 120 is a fixed value of 50 cm, it can be determined that the opening area is 500, or the length to be pulled out is 10 cm, and the sealed drawer 120 is completely The length when pulled out is 20 cm, and the opening area ratio can also be determined to be 50%.
  • the interior of the storage compartment is provided with a sealed box 110, the sealed casing 110 is provided with a pivotable door body, and the trigger detecting device 300 is opened as a sealed space 100 by detecting a signal of opening and closing of the door body Trigger signal.
  • the opening detecting device 400 may further include an angle sensor that detects the door opening angle to determine the opening size according to the angle.
  • the above length range or width may be set in advance based on the test of the sealed drawer 120.
  • the above specific numerical values are merely illustrative and are not intended to limit the invention.
  • the nitrogen generator 200 also queries the preset nitrogen production time relationship table according to the opening size and the opening duration to obtain the nitrogen production time, and the nitrogen production time relationship table records the different opening sizes and the opening durations respectively corresponding to the test.
  • Nitrogen production time The inventor has repeatedly tested, and obtained the corresponding nitrogen production time of different opening sizes and opening durations, and set the corresponding relationship of the three in the form of nitrogen production time relationship in the refrigerating and freezing equipment, and the nitrogen generating device 200 According to the detected opening size and the opening duration, the nitrogen production time relationship table is queried to obtain the corresponding nitrogen production time. For example, when the sealed space 100 is opened this time, the opening area ratio is detected to be 60%, and the opening duration is 2 minutes. Looking up the table, the corresponding nitrogen production time is 30 min.
  • the nitrogen generator 200 needs to continuously produce nitrogen for 30 min.
  • the correspondence between the opening size, the opening duration, and the nitrogen production time may also be pre-set in a functional relationship in the refrigerating and freezing apparatus, and the nitrogen generating apparatus 200 may also be based on the detected opening.
  • the size and the duration of the opening are calculated according to the functional relationship to obtain the corresponding nitrogen production time.
  • the nitrogen generator 200 is turned on and continuously operated for a second predetermined time in a case where the trigger signal is not detected within the first preset time for ending the nitrogen production, to supplement the nitrogen leaked naturally in the sealed space 100.
  • the sealed space 100 may also have a decrease in the internal nitrogen concentration due to natural causes such as leakage of the gap.
  • the nitrogen generator 200 determines that the sealed space 100 has not been opened for the first predetermined time after each nitrogen production, starts nitrogen production and continues to work for a second predetermined time to increase the nitrogen concentration of the sealed space 100. To the preset concentration value.
  • the time required for the concentration of nitrogen in the sealed space 100 to decrease from the preset concentration to the concentration that cannot meet the freshness requirement is tested, and the first preset time is set according to the test result, and the second preset time is set.
  • the nitrogen generator 200 is set according to the time required for the nitrogen concentration in the sealed space 100 to be raised from the concentration that cannot satisfy the freshness requirement to the preset concentration.
  • the first preset time is 10 h and the second preset time is 20 min.
  • the refrigerating and freezing apparatus of this embodiment further includes a temperature sensor 600.
  • the temperature sensor 600 detects the operating temperature of the nitrogen generator 200.
  • the nitrogen generator 200 of the present embodiment includes an air compressor for generating compressed air, and the above operating temperature may be an operating temperature of the air compressor.
  • the nitrogen generator 200 also intermittently operates in the process of detecting that the working temperature is greater than the preset temperature in the process of supplying nitrogen to the sealed space 100 according to the nitrogen production time, that is, after the nitrogen generator 200 is operated for a period of time, after stopping for a period of time, Restart, repeat the cycle until the accumulated cumulative time reaches the determined nitrogen production time, thereby reducing the operating temperature of the nitrogen generator and preventing the supplied nitrogen temperature from affecting the refrigeration and refrigeration equipment.
  • the refrigerating and freezing apparatus of the present embodiment can also control the working mode of the nitrogen generating apparatus 200 according to the operating temperature of the nitrogen generating apparatus 200, and intermittently operate to detect the temperature of the nitrogen generating apparatus 200 when the operating temperature is detected to be greater than the preset temperature. Rising to prevent the nitrogen generator 200 from being overheated causes damage to the nitrogen generator 200 itself.
  • the above preset temperature can be set according to the maximum temperature value allowed by the nitrogen generator 200.
  • the invention also provides a nitrogen control method for a refrigerating and freezing device, and FIG. 4 is according to the present invention.
  • FIG. 4 is according to the present invention.
  • a storage space 100 is disposed inside the storage compartment of the refrigerating and freezing apparatus, and the refrigerating and freezing apparatus is provided with a nitrogen generating apparatus 200 for supplying nitrogen to the sealed space 100, and the control method includes:
  • a trigger signal for opening and closing the sealed space 100 is detected, and the trigger signal may be emitted by an opening and closing detecting device provided in the opening of the sealed space 100.
  • the above-described opening and closing detecting device may be a Hall sensor, a photoelectric sensor, or the like.
  • Step S404 after determining that the sealed space 100 is opened according to the trigger signal, detecting the size of the opening in which the sealed space 100 is opened and the opening duration of the sealed space 100.
  • the opening detecting device 400 provided in the opening of the sealed space 100 detects the size of the opening in which the sealed space 100 is opened, and the timing device 500 records the opening duration of the sealed space 100.
  • Step S406 determining the nitrogen production time required for the nitrogen generator 200 to increase the nitrogen concentration of the sealed space 100 to a preset concentration according to the opening size and the opening duration.
  • the refrigerating and freezing apparatus of the present embodiment determines the time required for the nitrogen generating apparatus 200 to produce nitrogen to the sealed space 100 in accordance with the opening size of the user to open the sealed space 100 and the opening duration to ensure that the nitrogen in the sealed space 100 is kept sufficient.
  • the inventors have found through experiments that the nitrogen leakage amount of the sealed space 100 is mainly related to the opening size of the user opening the sealed space 100 and the duration of opening the sealed space 100. Therefore, the nitrogen production time is also the opening size of the user opening the sealed space 100. And the duration of opening the sealed space 100 is related. Specifically, the larger the opening, the longer the opening duration, and the more nitrogen leakage, the longer the required nitrogen production time.
  • Step S408 after the sealed space 100 is closed, the nitrogen generator 200 is controlled to supply nitrogen gas to the sealed space 100 according to the nitrogen production time, so that the nitrogen concentration in the sealed space 100 is raised to a preset concentration.
  • the above preset concentration can be set according to the nitrogen concentration that satisfies the food freshness requirement.
  • FIG. 5 is a flow chart of a method of controlling a refrigerating and freezing apparatus in accordance with one embodiment of the present invention.
  • the control method performs the following steps in sequence:
  • Step S502 detecting a signal that the sealed drawer 120 is opened and closed as a trigger signal.
  • the interior of the storage compartment is provided with a sealed drawer 120 that defines a sealed space 100, and the trigger detecting device 300 detects a signal that the sealed drawer 120 is opened and closed as a trigger signal that the sealed space 100 is opened.
  • Step S504 after determining that the sealed space 100 is opened according to the trigger signal, detecting the sealed drawer The length of 120 is pulled out to determine the size of the opening based on the length.
  • the refrigerating and freezing apparatus of the present embodiment is provided with a displacement sensor 400 for detecting the length at which the sealed drawer 120 is pulled out to determine the opening size according to the length, and the opening size may include an opening area, an opening area ratio, and the like.
  • the displacement sensor 400 detects that the length of the sealed drawer 120 is 10 cm, and the width of the sealed drawer 120 is a fixed value of 50 cm, it can be determined that the opening area is 500, or the length to be pulled out is 10 cm, and the sealed drawer 120 is completely The length when pulled out is 20 cm, and the opening area ratio can also be determined to be 50%.
  • the interior of the storage compartment is provided with a sealed box 110, the sealed casing 110 is provided with a pivotable door body, and the trigger detecting device 300 is opened as a sealed space 100 by detecting a signal of opening and closing of the door body Trigger signal.
  • the opening detecting device 400 may further include an angle sensor that detects the door opening angle to determine the opening size according to the angle.
  • the above length range or width may be set in advance based on the test of the sealed drawer 120.
  • the above specific numerical values are merely illustrative and are not intended to limit the invention.
  • Step S506 after determining that the sealed space 100 is opened according to the trigger signal, recording the opening duration of the sealed space 100.
  • Step S508 querying the preset nitrogen production time relationship table according to the opening size and the opening duration to obtain the nitrogen production time.
  • the nitrogen generator 200 also queries the preset nitrogen production time relationship table according to the opening size and the opening duration to obtain the nitrogen production time, and the nitrogen production time relationship table records the different opening sizes and the opening durations respectively corresponding to the test. Nitrogen production time.
  • the inventor has repeatedly tested, and obtained the corresponding nitrogen production time of different opening sizes and opening durations, and set the corresponding relationship of the three in the form of nitrogen production time relationship in the refrigerating and freezing equipment, and the nitrogen generating device 200 According to the detected opening size and the opening duration, the nitrogen production time relationship table is queried to obtain the corresponding nitrogen production time. For example, when the sealed space 100 is opened this time, the opening area ratio is detected to be 60%, the opening duration is 2 minutes, and the corresponding nitrogen production time is 30 minutes.
  • the nitrogen generating device 200 After the sealed space 100 is closed, the nitrogen generating device 200 needs to be continuously manufactured. Nitrogen for 30 min.
  • the correspondence between the opening size, the opening duration, and the nitrogen production time may also be pre-set in a functional relationship in the refrigerating and freezing apparatus, and the nitrogen generating apparatus 200 may also be based on the detected opening. The size and the duration of the opening are calculated according to the functional relationship to obtain the corresponding nitrogen production time. The above specific values are merely illustrative and are not intended to limit the invention.
  • step S510 after the sealed space 100 is closed, the nitrogen generator 200 is controlled to supply nitrogen gas to the sealed space 100 to raise the nitrogen concentration in the sealed space 100 to a preset concentration.
  • concentration can be set according to the nitrogen concentration that satisfies the food preservation requirements.
  • step S512 the operating temperature of the nitrogen generator 200 is detected.
  • step S514 it is determined whether the operating temperature is greater than a preset temperature.
  • the above preset temperature can be set according to the maximum temperature value allowed by the nitrogen generator 200.
  • step S5166 if the result of the determination in step S514 is YES, the nitrogen generator 200 is controlled to operate intermittently.
  • the nitrogen generator 200 also intermittently operates in the process of detecting that the working temperature is greater than the preset temperature in the process of supplying nitrogen to the sealed space 100 according to the nitrogen production time, that is, after the nitrogen generator 200 is operated for a period of time, after stopping for a period of time, Restart, repeat the cycle until the cumulative total of the accumulated operation time reaches the determined nitrogen production time, thereby reducing the operating temperature of the nitrogen generator and preventing the refrigeration and refrigeration equipment from being affected.
  • the refrigerating and freezing apparatus of the present embodiment can also control the working mode of the nitrogen generating apparatus 200 according to the operating temperature of the nitrogen generating apparatus 200, and intermittently operate to detect the temperature of the nitrogen generating apparatus 200 when the operating temperature is detected to be greater than the preset temperature. Rising to prevent the nitrogen generator 200 from being overheated causes damage to the nitrogen generator 200 itself.
  • the above preset temperature can be set according to the maximum temperature value allowed by the nitrogen generator 200.
  • step S520 if the result of the determination in step S518 is YES, the nitrogen generator is turned off.
  • FIG. 6 is a flow chart of a nitrogen control method of a refrigerating and freezing apparatus according to another embodiment of the present invention.
  • the control method performs the following steps in sequence:
  • Step S602 detecting a trigger signal for opening and closing the sealed space 100.
  • step S604 it is determined whether a trigger signal is detected in the first preset time for ending the nitrogen production.
  • Step S606 if the result of the determination in step S604 is no, the nitrogen generator is turned on and continues to operate for the second preset time.
  • the nitrogen generator 200 is turned on and continuously operated for a second predetermined time in a case where the trigger signal is not detected within the first preset time for ending the nitrogen production, to supplement the nitrogen leaked naturally in the sealed space 100.
  • the sealed space 100 may also have a decrease in the internal nitrogen concentration due to natural causes such as leakage of the gap.
  • the nitrogen generator 200 determines that the sealed space 100 has not been opened for the first predetermined time after each nitrogen production, starts nitrogen production and continues to work for a second predetermined time to increase the nitrogen concentration of the sealed space 100.
  • the time required for the concentration of nitrogen in the sealed space 100 to decrease from the preset concentration to the concentration that cannot meet the freshness requirement is tested, and the first preset time is set according to the test result, and the second preset time is set.
  • the nitrogen generator 200 is set according to the time required for the nitrogen concentration in the sealed space 100 to be raised from the concentration that cannot satisfy the freshness requirement to the preset concentration.
  • the first preset time is 10 h and the second preset time is 20 min.
  • Step S608 if the result of the determination in step S604 is YES, after determining that the sealed space 100 is opened according to the trigger signal, detecting the opening size of the sealed space 100 and the opening duration of the sealed space 100, the subsequent steps are as shown in FIG. The methods are executed in sequence and will not be described here.
  • the present embodiment provides a nitrogen control method for a refrigerating and freezing apparatus.
  • the inside of the storage compartment of the refrigerating and freezing apparatus is provided with a sealed space 100
  • the refrigerating and freezing apparatus is provided with a nitrogen generating apparatus 200 for supplying nitrogen to the sealed space 100.
  • the control method determines the nitrogen production time required for the nitrogen generator 200 to increase the nitrogen concentration of the sealed space 100 to a preset concentration according to the size of the opening in which the sealed space 100 is opened and the opening duration of the sealed space 100, and in the sealed space After the 100 is turned off, the nitrogen generator 200 is controlled to supply nitrogen to the sealed space 100 in accordance with the nitrogen production time.
  • the refrigerating and freezing apparatus of the present embodiment determines the nitrogen-making time of the nitrogen-producing device 200 according to the opening size and the opening duration of the sealing space 100, and the sealed space 100 of the refrigerating and freezing device is opened, causing nitrogen leakage inside thereof, and the nitrogen generating device 200 is supplied with nitrogen gas to the sealed space 100 according to the nitrogen production time, and the nitrogen leaked portion is supplemented so that the nitrogen in the sealed space 100 is always within the range of the nitrogen concentration satisfying the freshness requirement.
  • control method of the embodiment queries the preset nitrogen production time relationship table according to the opening size and the opening duration to obtain the nitrogen production time, and the nitrogen production time relationship table records the different opening sizes and the opening by the test in advance. The duration of the nitrogen production time.
  • the control method of this embodiment determines the nitrogen production time by means of a look-up table, so that the determined nitrogen production time is more accurate.

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Abstract

提供一种用于冷藏冷冻设备的制氮控制方法以及冷藏冷冻设备。冷藏冷冻设备的储物间室内部设置有密封空间（100），冷藏冷冻设备设置有向密封空间（100）提供氮气的制氮装置（200），制氮装置（200）根据密封空间（100）被打开的开口大小和开启持续时间确定制氮时间。

Description

用于冷藏冷冻设备的制氮控制方法以及冷藏冷冻设备 技术领域
本发明涉及物品存储领域，特别涉及一种用于冷藏冷冻设备的制氮控制方法以及冷藏冷冻设备。
背景技术
目前的一些冷藏冷冻设备为了提高自身的保鲜效果，会在其内部安装制氮装置，并向其内部间室充入氮气以抑制食物自身的有氧呼吸和微生物的生长。
目前的冷藏冷冻设备的制氮装置制备氮气按照预设的模式进行，例如在门体关闭后开始制氮并持续固定的运行时间，制氮装置在固定的制氮时间内持续制氮以将间室的氮气浓度提升至目标浓度，但是，通过经验设置的制氮时间往往不够准确，如果制氮时间过长，会造成能源浪费；如果制氮时间不足，间室内部氮气浓度不能达到预设要求，影响食物保鲜，为了解决上述问题，也存在在密封间室内设置氮气传感器进行控制的方案，一方面增加了设备成本，另外氮气传感器的数据传输所需的传输线缆也会对间室的密封性造成一定的影响。
发明内容
鉴于上述问题，提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问题的用于冷藏冷冻设备的制氮控制方法以及冷藏冷冻设备。
本发明一个进一步的目的是要使得冷藏冷冻设备的密封空间内氮气浓度满足保鲜要求。
本发明的另一个进一步的目的是要准确确定冷藏冷冻设备的制氮装置的工作时长。
根据本发明的一个方面，本发明提供了一种用于冷藏冷冻设备的制氮控制方法，冷藏冷冻设备的储物间室内部设置有密封空间，冷藏冷冻设备设置有用于向密封空间提供氮气的制氮装置，并且控制方法包括：检测开闭密封空间的触发信号；根据触发信号确定密封空间被打开后，检测密封空间被打开的开口大小以及密封空间的开启持续时间；根据开口大小以及开启持续时 间确定制氮装置将密封空间的氮气浓度提高至预设浓度所需的制氮时间；在密封空间被关闭后，控制制氮装置按照制氮时间向密封空间提供氮气。
可选地，储物间室内部设置有密封抽屉，由密封抽屉限定出密封空间；并且检测开闭密封空间的触发信号的步骤包括：检测密封抽屉开闭的信号，以作为触发信号；以及检测密封空间被打开的开口大小的步骤包括：检测密封抽屉被拉出的长度，以根据长度确定开口大小。
可选地，根据开口大小以及开启持续时间确定制氮时间的步骤包括：根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间，制氮时间关系表记录有预先通过测试得出不同的开口大小以及开启持续时间对应的制氮时间。
可选地，在制氮装置结束制氮的第一预设时间内未检测到触发信号，开启制氮装置并持续工作第二预设时间，以补充密封空间自然泄露的氮气。
可选地，控制制氮装置按照制氮时间向密封空间提供氮气的过程中还包括：检测制氮装置的工作温度，并判断工作温度是否大于预设温度；若是，控制制氮装置间歇工作。
根据本发明的另一个方面，还提供了一种冷藏冷冻设备，上述冷藏冷冻设备具有储物间室，储物间室内部设置有密封空间，并且冷藏冷冻设备还包括：制氮装置，配置成向密封空间提供氮气；触发检测装置，配置成检测开闭密封空间的触发信号；开口检测装置，配置成根据触发信号确定密封空间被打开后，检测密封空间被打开的开口大小；计时装置，配置成根据触发信号确定密封空间被打开后，记录密封空间的开启持续时间；制氮装置，还配置成根据开口大小以及开启持续时间确定制氮装置将密封空间的氮气浓度提高至预设浓度所需的制氮时间，并在密封空间被关闭后，按照制氮时间向密封空间提供氮气。
可选地，上述冷藏冷冻设备还包括：密封抽屉，设置于储物间室内部，由密封抽屉限定出密封空间；以及位移传感器，配置成检测密封抽屉被拉出的长度，以根据长度确定开口大小。
可选地，制氮装置，还配置成根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间，制氮时间关系表记录有预先通过测试得出不同的开口大小以及开启持续时间各自对应的制氮时间。
可选地，制氮装置，还配置成在结束制氮的第一预设时间内未检测到触 发信号的情况下，开启并持续工作第二预设时间，以补充密封空间自然泄露的氮气。
可选地，上述冷藏冷冻设备还包括：温度传感器，配置成检测制氮装置的工作温度；并且制氮装置，还配置成在控制制氮装置按照制氮时间向密封空间提供氮气的过程中，检测到工作温度大于预设温度的情况下，间歇工作。
本发明提供了一种用于冷藏冷冻设备的制氮控制方法，冷藏冷冻设备的储物间室内部设置有密封空间，冷藏冷冻设备设置有用于向密封空间提供氮气的制氮装置，并且控制方法根据密封空间被打开的开口大小以及密封空间的开启持续时间确定制氮装置将密封空间的氮气浓度提高至预设浓度所需的制氮时间，并在密封空间被关闭后，控制制氮装置按照制氮时间向密封空间提供氮气。本发明的冷藏冷冻设备根据密封空间开启的开口大小以及开启持续时间确定制氮装置的制氮时间，冷藏冷冻设备的密封空间在打开后，造成其内部部分氮气泄露，制氮装置按照制氮时间向密封空间提供氮气，对氮气泄露的部分进行补充，使得密封空间内的氮气始终处于满足保鲜要求的氮气浓度的范围内。
进一步地，本发明的控制方法根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间，制氮时间关系表记录有预先通过测试得出不同的开口大小以及开启持续时间对应的制氮时间。本发明的控制方法通过查表的方式确定制氮时间，使得确定出的制氮时间更加准确。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的冷藏冷冻设备示意图；
图2是根据本发明一个实施例的冷藏冷冻设备示意框图；
图3是根据本发明另一个实施例的冷藏冷冻设备的示意框图；
图4是根据本发明一个实施例的冷藏冷冻设备的制氮控制方法的示意图；
图5是根据本发明一个实施例的冷藏冷冻设备的制氮控制方法的流程图；以及
图6是根据本发明另一个实施例的冷藏冷冻设备的制氮控制方法的流程图。
具体实施方式
本实施例首先提供了一种冷藏冷冻设备，图1是根据本发明一个实施例的冷藏冷冻设备示意图，图2是根据本发明一个实施例的冷藏冷冻设备示意框图。该冷藏冷冻设备可以为冰箱、冰柜等。
本实施例的冷藏冷冻设备具有储物间室，储物间室内部设置有密封空间100，在本实施例中储物间室内设置有密封盒110，上述密封空间100可以由密封盒110限定出，在一些可选的实施例中，上述密封空间100也可以由密封抽屉、密封罐、密封箱等限定出。本实施例冷藏冷冻设备包括：制氮装置200、触发检测装置300、开口检测装置400、以及计时装置500。
制氮装置200向密封空间100提供氮气。本实施例的制氮装置200可以利用PSA制氮方法，将空气中氧气去除从而产生纯净的氮气。变压吸附PSA(Pressure Swing Adsorption)具体是指在温度不变的情况下，对混合气体进行加压，并利用吸附剂吸附多余的杂质气体从而获得较为纯净的单一气体，再用减压(抽真空)或常压的方法使得吸附剂内的杂质气体解吸出来，以对吸附剂进行二次利用。本实施例的制氮装置200可以包括空压机以及氮氧分离器，空压机向氮氧分离器提供压缩空气。氧气吸附剂设置于氮氧分离器内部，氮氧分离器以压缩空气为原料，运用变压吸附技术，利用吸附剂对氧和氮的选择性吸附，实现空气中的氮和氧分离，从而生产出纯净的氮气。
触发检测装置300检测开闭密封空间100的触发信号。开口检测装置400根据触发信号确定密封空间100被打开后，检测密封空间100被打开的开口大小。计时装置500根据触发信号确定密封空间100被打开后，记录密封空间100的开启持续时间。制氮装置200配置成成根据开口大小以及开启持续时间确定制氮装置200将密封空间100的氮气浓度提高至预设浓度所需的制氮时间，并在密封空间100被关闭后，按照制氮时间向密封空间100提供氮气。上述预设浓度可以根据满足食物保鲜要求的氮气浓度来进行设置。
在用户使用密封空间100后，会造成密封空间100内部分氮气的流失。 因此需要在用户关闭密封空间100后，对密封空间100进行氮气补充。本实施例的冷藏冷冻设备依据用户本次开启密封空间100的开口大小以及开启持续时间确定制氮装置200需要向密封空间100制氮的时间，以确保密封空间100内的氮气保持充足。经发明人多次实验发现，密封空间100的氮气泄露量主要与用户开启密封空间100的开口大小以及开启密封空间100的持续时间相关，因此，制氮时间也与用户开启密封空间100的开口大小以及开启密封空间100的持续时间相关，具体的，开口越大，开启持续时间越长，氮气泄露量越多，所需制氮时间越长。
图3是根据本发明另一个实施例的冷藏冷冻设备的示意框图。本实施例的冷藏冷冻设备包括：密封抽屉120、制氮装置200、触发检测装置300、位移传感器400以及计时装置500。
密封抽屉120设置于储物间室内部，由密封抽屉120限定出密封空间100，触发检测装置300通过检测密封抽屉120开闭的信号作为密封空间100被打开的触发信号。位移传感器400检测密封抽屉120被拉出的长度，以根据长度确定开口大小，上述开口大小可以为开口面积、开口面积比等。例如位移传感器400检测到密封抽屉120被拉出的长度为10cm，密封抽屉120的宽度为固定值50cm，则可确定开口面积为500，或者被拉出的长度为10cm，而密封抽屉120被完全拉出时的长度为20cm，也可确定开口面积比为50％。在另外一些可替代地实施例中，储物间室内部设置有密封盒110，密封盒110设置有可枢转门体，触发检测装置300通过检测门体开闭的信号作为密封空间100被打开的触发信号。开口检测装置400还可以包括角度传感器，角度传感器检测门体打开角度，以根据角度确定开口大小。以上长度范围或宽度可以预先根据对密封抽屉120的测试设定初始值，上述具体数值仅为举例说明，并非对本发明构成限定。
制氮装置200还根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间，制氮时间关系表记录有预先通过测试得出不同的开口大小以及开启持续时间各自对应的制氮时间。经发明人多次测试，得出不同的开口大小以及开启持续时间各自对应的制氮时间，并将三者的对应关系以制氮时间关系表的形式设置于冷藏冷冻设备内，制氮装置200根据检测出的开口大小以及开启持续时间查询制氮时间关系表以得出对应的制氮时间。例如，本次开启密封空间100，检测到开口面积比为60％，开启持续时间为2min， 查表得出对应的制氮时间为30min，在密封空间100关闭后，制氮装置200需要持续制氮30min。在一些可替代的实施例中，还可以将开口大小、开启持续时间以及制氮时间的对应关系以函数关系式的形式预先设置于冷藏冷冻设备内，制氮装置200还可以根据检测出的开口大小以及开启持续时间根据函数关系式计算得出对应的制氮时间。上述具体数值仅为举例说明，并非对本发明构成限定。
本实施例中，制氮装置200在结束制氮的第一预设时间内未检测到触发信号的情况下，开启并持续工作第二预设时间，以补充密封空间100自然泄露的氮气。在密封空间100长时间未打开的情况下，密封空间100也会因为缝隙泄露等自然原因导致其内部氮气浓度下降。制氮装置200在每次制氮后的第一预设时间内确定密封空间100一直未被打开的情况下，启动制氮并持续工作第二预设时间，以将密封空间100的氮气浓度提升至预设浓度值。在冷藏冷冻设备出厂时，对密封空间100内的氮气浓度由预设浓度下降至无法满足保鲜要求的浓度所需时间进行测试，并根据测试结果设置第一预设时间，上述第二预设时间根据制氮装置200将密封空间100内的氮气浓度由无法满足保鲜要求的浓度提升至预设浓度的所需时间进行设置，例如，第一预设时间为10h，第二预设时间为20min。上述具体数值仅为举例说明，并非对本发明构成限定。
本实施例的冷藏冷冻设备还包括：温度传感器600。温度传感器600检测制氮装置200的工作温度。本实施例的制氮装置200包括用于产生压缩空气的空压机，上述工作温度可以是空压机的工作温度。制氮装置200还在按照制氮时间向密封空间100提供氮气的过程中，检测到工作温度大于预设温度的情况下，间歇工作，也即制氮装置200运行一段时间后，停止一段时间后重新启动，重复该循环直至累计运行的时间累计总和达到确定的制氮时间，从而降低制氮装置的工作温度，防止提供的氮气温度对冷藏冷冻设备造成影响。本实施例的冷藏冷冻设备还可以根据述制氮装置200的工作温度控制制氮装置200的工作方式，在检测到工作温度大于预设温度的情况下，间歇工作，减缓制氮装置200的温度上升，以防止制氮装置200温度过高对制氮装置200本身造成损害。上述预设温度可以根据制氮装置200允许达到的最大温度值来进行设定。
本发明还提供了一种用于冷藏冷冻设备的制氮控制方法，图4是根据本 发明一个实施例的冷藏冷冻设备的制氮控制方法的示意图。冷藏冷冻设备的储物间室内部设置有密封空间100，冷藏冷冻设备设置有用于向密封空间100提供氮气的制氮装置200，并且控制方法包括：
步骤S402，检测开闭密封空间100的触发信号，该触发信号可以由设置于密封空间100开口的开闭检测装置发出。上述开闭检测装置可以为霍尔传感器、光电传感器等等。
步骤S404，根据触发信号确定密封空间100被打开后，检测密封空间100被打开的开口大小以及密封空间100的开启持续时间。利用设置于密封空间100开口的开口检测装置400检测密封空间100被打开的开口大小，利用计时装置500记录密封空间100的开启持续时间。
步骤S406，根据开口大小以及开启持续时间确定制氮装置200将密封空间100的氮气浓度提高至预设浓度所需的制氮时间。
在用户使用密封空间100后，会造成密封空间100内部分氮气的流失。因此需要在用户关闭密封空间100后，对密封空间100进行氮气补充。本实施例的冷藏冷冻设备依据用户本次开启密封空间100的开口大小以及开启持续时间确定制氮装置200需要向密封空间100制氮的时间，以确保密封空间100内的氮气保持充足。经发明人多次实验发现，密封空间100的氮气泄露量主要与用户开启密封空间100的开口大小以及开启密封空间100的持续时间相关，因此，制氮时间也与用户开启密封空间100的开口大小以及开启密封空间100的持续时间相关，具体的，开口越大，开启持续时间越长，氮气泄露量越多，所需制氮时间越长。
步骤S408，在密封空间100被关闭后，控制制氮装置200按照制氮时间向密封空间100提供氮气，以使得密封空间100内的氮气浓度提升至预设浓度。上述预设浓度可以根据满足食物保鲜要求的氮气浓度来进行设置。
图5是根据本发明一个实施例的冷藏冷冻设备的控制方法的流程图。该控制方法依次执行以下步骤：
步骤S502，检测密封抽屉120开闭的信号，以作为触发信号。在本实施例中，储物间室内部设置有密封抽屉120，密封抽屉120限定出密封空间100，触发检测装置300通过检测密封抽屉120开闭的信号作为密封空间100被打开的触发信号。
步骤S504，根据触发信号确定密封空间100被打开后，检测密封抽屉 120被拉出的长度，以根据长度确定开口大小。本实施例的冷藏冷冻装置设置有位移传感器400用于检测密封抽屉120被拉出的长度，以根据长度确定开口大小，上述开口大小可以包括开口面积、开口面积比等。例如位移传感器400检测到密封抽屉120被拉出的长度为10cm，密封抽屉120的宽度为固定值50cm，则可确定开口面积为500，或者被拉出的长度为10cm，而密封抽屉120被完全拉出时的长度为20cm，也可确定开口面积比为50％。在另外一些可替代地实施例中，储物间室内部设置有密封盒110，密封盒110设置有可枢转门体，触发检测装置300通过检测门体开闭的信号作为密封空间100被打开的触发信号。开口检测装置400还可以包括角度传感器，角度传感器检测门体打开角度，以根据角度确定开口大小。以上长度范围或宽度可以预先根据对密封抽屉120的测试设定初始值，上述具体数值仅为举例说明，并非对本发明构成限定。
步骤S506，根据触发信号确定密封空间100被打开后，记录密封空间100的开启持续时间。
步骤S508，根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间。
制氮装置200还根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间，制氮时间关系表记录有预先通过测试得出不同的开口大小以及开启持续时间各自对应的制氮时间。经发明人多次测试，得出不同的开口大小以及开启持续时间各自对应的制氮时间，并将三者的对应关系以制氮时间关系表的形式设置于冷藏冷冻设备内，制氮装置200根据检测出的开口大小以及开启持续时间查询制氮时间关系表以得出对应的制氮时间。例如，本次开启密封空间100，检测到开口面积比为60％，开启持续时间为2min，查表得出对应的制氮时间为30min，在密封空间100关闭后，制氮装置200需要持续制氮30min。在一些可替代的实施例中，还可以将开口大小、开启持续时间以及制氮时间的对应关系以函数关系式的形式预先设置于冷藏冷冻设备内，制氮装置200还可以根据检测出的开口大小以及开启持续时间根据函数关系式计算得出对应的制氮时间。上述具体数值仅为举例说明，并非对本发明构成限定。
步骤S510，在密封空间100被关闭后，控制制氮装置200向密封空间100提供氮气，以使得密封空间100内的氮气浓度提升至预设浓度。上述预 设浓度可以根据满足食物保鲜要求的氮气浓度来进行设置。
步骤S512，检测制氮装置200的工作温度。
步骤S514，判断工作温度是否大于预设温度。上述预设温度可以根据制氮装置200允许达到的最大温度值来进行设定。
步骤S516，若步骤S514的判断结果为是，控制制氮装置200间歇工作。制氮装置200还在按照制氮时间向密封空间100提供氮气的过程中，检测到工作温度大于预设温度的情况下，间歇工作，也即制氮装置200运行一段时间后，停止一段时间后重新启动，重复该循环直至累计运行的时间累计总和达到确定的制氮时间，从而降低制氮装置的工作温度，防止对冷藏冷冻设备造成影响。本实施例的冷藏冷冻设备还可以根据述制氮装置200的工作温度控制制氮装置200的工作方式，在检测到工作温度大于预设温度的情况下，间歇工作，减缓制氮装置200的温度上升，以防止制氮装置200温度过高对制氮装置200本身造成损害。上述预设温度可以根据制氮装置200允许达到的最大温度值来进行设定。
步骤S518，若步骤S514的判断结果为否，判断制氮装置200累计工作时间是否达到制氮时间。若制氮装置200在上述步骤中持续工作，则判断其持续工作时间是否达到制氮时间；若制氮装置200在上述步骤中间歇工作，则判断其处于工作状态下的累计时间是否达到制氮时间。若判断结果为否，重复检测制氮装置200的工作温度。
步骤S520，若步骤S518的判断结果为是，关闭制氮装置。
图6是根据本发明另一个实施例的冷藏冷冻设备的制氮控制方法的流程图。该控制方法依次执行以下步骤：
步骤S602，检测开闭所述密封空间100的触发信号。
步骤S604，判断在结束制氮的第一预设时间内是否检测到触发信号。
步骤S606，若步骤S604的判断结果为否，开启制氮装置并持续工作第二预设时间。本实施例中，制氮装置200在结束制氮的第一预设时间内未检测到触发信号的情况下，开启并持续工作第二预设时间，以补充密封空间100自然泄露的氮气。在密封空间100长时间未打开的情况下，密封空间100也会因为缝隙泄露等自然原因导致其内部氮气浓度下降。制氮装置200在每次制氮后的第一预设时间内确定密封空间100一直未被打开的情况下，启动制氮并持续工作第二预设时间，以将密封空间100的氮气浓度提升至预设浓度 值。在冷藏冷冻设备出厂时，对密封空间100内的氮气浓度由预设浓度下降至无法满足保鲜要求的浓度所需时间进行测试，并根据测试结果设置第一预设时间，上述第二预设时间根据制氮装置200将密封空间100内的氮气浓度由无法满足保鲜要求的浓度提升至预设浓度的所需时间进行设置，例如，第一预设时间为10h，第二预设时间为20min。上述具体数值仅为举例说明，并非对本发明构成限定。
步骤S608，若步骤S604的判断结果为是，根据触发信号确定密封空间100被打开后，检测密封空间100被打开的开口大小以及密封空间100的开启持续时间，后续的步骤按照图5所示的方法依次执行，这里不再进行赘述。
本实施例提供了一种用于冷藏冷冻设备的制氮控制方法，冷藏冷冻设备的储物间室内部设置有密封空间100，冷藏冷冻设备设置有用于向密封空间100提供氮气的制氮装置200，并且控制方法根据密封空间100被打开的开口大小以及密封空间100的开启持续时间确定制氮装置200将密封空间100的氮气浓度提高至预设浓度所需的制氮时间，并在在密封空间100被关闭后，控制制氮装置200按照制氮时间向密封空间100提供氮气。本实施例的冷藏冷冻设备根据密封空间100开启的开口大小以及开启持续时间确定制氮装置200的制氮时间，冷藏冷冻设备的密封空间100在打开后，造成其内部部分氮气泄露，制氮装置200按照制氮时间向密封空间100提供氮气，对氮气泄露的部分进行补充，使得密封空间100内的氮气始终处于满足保鲜要求的氮气浓度的范围内。
进一步地，本实施例的控制方法根据开口大小以及开启持续时间查询预置的制氮时间关系表以得出制氮时间，制氮时间关系表记录有预先通过测试得出不同的开口大小以及开启持续时间对应的制氮时间。本实施例的控制方法通过查表的方式确定制氮时间，使得确定出的制氮时间更加准确。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种用于冷藏冷冻设备的制氮控制方法，所述冷藏冷冻设备的储物间室内部设置有密封空间，所述冷藏冷冻设备设置有用于向所述密封空间提供氮气的制氮装置，并且所述控制方法包括：
    检测开闭所述密封空间的触发信号；
    根据所述触发信号确定所述密封空间被打开后，检测所述密封空间被打开的开口大小以及所述密封空间的开启持续时间；
    根据所述开口大小以及所述开启持续时间确定所述制氮装置将所述密封空间的氮气浓度提高至预设浓度所需的制氮时间；
    在所述密封空间被关闭后，控制所述制氮装置按照所述制氮时间向所述密封空间提供氮气。
  2. 根据权利要求1所述的方法，其中，
    所述储物间室内部设置有密封抽屉，由所述密封抽屉限定出所述密封空间；并且
    检测开闭所述密封空间的触发信号的步骤包括：检测所述密封抽屉开闭的信号，以作为所述触发信号；以及
    检测所述密封空间被打开的开口大小的步骤包括：检测所述密封抽屉被拉出的长度，以根据所述长度确定所述开口大小。
  3. 根据权利要求1所述的方法，其中，根据所述开口大小以及所述开启持续时间确定所述制氮时间的步骤包括：
    根据所述开口大小以及所述开启持续时间查询预置的制氮时间关系表以得出所述制氮时间，所述制氮时间关系表记录有预先通过测试得出不同的所述开口大小以及所述开启持续时间对应的所述制氮时间。
  4. 根据权利要求1所述的方法，其中，
    在所述制氮装置结束制氮的第一预设时间内未检测到所述触发信号，开启所述制氮装置并持续工作第二预设时间，以补充所述密封空间自然泄露的氮气。
  5. 根据权利要求1所述的方法，其中，控制所述制氮装置按照所述制氮时间向所述密封空间提供氮气的过程中还包括：
    检测所述制氮装置的工作温度，并判断所述工作温度是否大于预设温度；
    若是，控制所述制氮装置间歇工作。
  6. 一种冷藏冷冻设备，具有储物间室，所述储物间室内部设置有密封空间，并且所述冷藏冷冻设备还包括：
    制氮装置，配置成向所述密封空间提供氮气；
    触发检测装置，配置成检测开闭所述密封空间的触发信号；
    开口检测装置，配置成根据所述触发信号确定所述密封空间被打开后，检测所述密封空间被打开的开口大小；
    计时装置，配置成根据所述触发信号确定所述密封空间被打开后，记录所述密封空间的开启持续时间；
    所述制氮装置，还配置成根据所述开口大小以及所述开启持续时间确定所述制氮装置将所述密封空间的氮气浓度提高至预设浓度所需的制氮时间，并在所述密封空间被关闭后，按照所述制氮时间向所述密封空间提供氮气。
  7. 根据权利要求6所述的冷藏冷冻设备，还包括：
    密封抽屉，设置于所述储物间室内部，由所述密封抽屉限定出所述密封空间；以及
    位移传感器，配置成检测所述密封抽屉被拉出的长度，以根据所述长度确定所述开口大小。
  8. 根据权利要求6所述的冷藏冷冻设备，其中，
    所述制氮装置，还配置成根据所述开口大小以及所述开启持续时间查询预置的制氮时间关系表以得出所述制氮时间，所述制氮时间关系表记录有预先通过测试得出不同的所述开口大小以及所述开启持续时间各自对应的所述制氮时间。
  9. 根据权利要求6所述的冷藏冷冻设备，其中，
    所述制氮装置，还配置成在结束制氮的第一预设时间内未检测到所述触发信号的情况下，开启并持续工作第二预设时间，以补充所述密封空间自然泄露的氮气。
  10. 根据权利要求6所述的冷藏冷冻设备，还包括：
    温度传感器，配置成检测所述制氮装置的工作温度；并且
    所述制氮装置，还配置成在控制所述制氮装置按照所述制氮时间向所述密封空间提供氮气的过程中，检测到所述工作温度大于预设温度的情况下，间歇工作。
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