WO2017202089A1 - 冷藏冷冻设备及其控制方法 - Google Patents

冷藏冷冻设备及其控制方法 Download PDF

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Publication number
WO2017202089A1
WO2017202089A1 PCT/CN2017/074608 CN2017074608W WO2017202089A1 WO 2017202089 A1 WO2017202089 A1 WO 2017202089A1 CN 2017074608 W CN2017074608 W CN 2017074608W WO 2017202089 A1 WO2017202089 A1 WO 2017202089A1
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WIPO (PCT)
Prior art keywords
nitrogen
air compressor
concentration
turned
sealed space
Prior art date
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Ceased
Application number
PCT/CN2017/074608
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English (en)
French (fr)
Inventor
娄喜才
王铭
苗建林
徐同
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Qingdao Haier Co Ltd
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Qingdao Haier Co Ltd
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Publication date
Application filed by Qingdao Haier Co Ltd filed Critical Qingdao Haier Co Ltd
Publication of WO2017202089A1 publication Critical patent/WO2017202089A1/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
    • F25D29/00—Arrangement or mounting of control or 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
    • F25D23/00—General constructional features
    • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/16—Sensors measuring the temperature of products

Definitions

  • the invention relates to the field of article storage, in particular to a refrigerating and freezing device and a control method thereof.
  • the nitrogen-making device of the refrigerating and freezing equipment generally sets a fixed nitrogen-making time by experience, and the nitrogen-making device continuously performs nitrogen production in a fixed nitrogen-making time to raise the nitrogen concentration of the compartment to the target concentration, but is set by experience.
  • the nitrogen production time is often not accurate enough, and if the nitrogen generator continues to work for a long time, it will cause its working temperature to rise rapidly, which will affect its normal use and reduce its service life.
  • the temperature of the nitrogen generator itself is too high, the temperature of the nitrogen gas generated will be too high, causing the temperature of the compartment to rise, which will affect the preservation of food.
  • the present invention has been made in order to provide a refrigerating and freezing apparatus and a control method thereof that overcome the above problems or at least partially solve the above problems.
  • a further object of the invention is to ensure that the nitrogen generator of the refrigerating and freezing apparatus operates normally.
  • a further object of the invention is to improve the operational reliability of the refrigerating and freezing apparatus.
  • Another further object of the invention is to reduce the operational noise of the refrigerating and freezing apparatus.
  • the present invention provides a control method of 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 generating apparatus for supplying nitrogen to the sealed space.
  • the nitrogen generator comprises an air compressor and a nitrogen-oxygen separator, wherein the air compressor is controlled to supply compressed air to the nitrogen-oxygen separator, so that the nitrogen-oxygen separator uses compressed air to prepare nitrogen
  • the control method comprises: detecting the seal The nitrogen concentration inside the space; determining whether the nitrogen concentration is greater than a preset first concentration threshold; if so, controlling the air compressor to continue to operate so that the nitrogen-oxygen separator continues to generate nitrogen until the nitrogen concentration reaches a preset second concentration threshold, The second concentration threshold is greater than the first concentration threshold; and if not, controlling the air compressor to be turned on for a first predetermined time, so that the nitrogen-oxygen separator prepares nitrogen during the preset time, and after the air compressor is turned on for the first preset time turn off
  • the step of detecting the concentration of nitrogen inside the sealed space is performed again after the second predetermined time interval.
  • the method further comprises: detecting an operating temperature of the air compressor; and in the case that the working temperature of the air compressor is greater than the first preset temperature, controlling the air compressor to start the third After the preset time, it is turned off, and after the fourth preset time is turned off, the concentration of nitrogen inside the sealed space is re-detected; and if not, the step of detecting the concentration of nitrogen inside the sealed space is performed.
  • the method further comprises: detecting whether the refrigeration compressor of the refrigerating and freezing device is turned on; if so, keeping the air compressor closed, and performing detection of nitrogen inside the sealed space after the refrigeration compressor is turned off The steps of the concentration.
  • the air compressor is turned off, and the step of detecting the nitrogen concentration inside the sealed space is re-executed after the air compressor is turned off for a fifth predetermined time.
  • the process of turning on the air compressor for nitrogen production further comprises: detecting a storage temperature of the storage compartment; determining whether the storage temperature is greater than a second preset temperature; if yes, closing the air compressor, and then turning on the refrigeration compression machine.
  • a refrigerating and freezing apparatus comprising: a sealed box disposed inside a storage compartment of the refrigerating and freezing apparatus, the sealed box defining a sealed space; and a nitrogen concentration sensor disposed in the sealed space Configuring to detect a concentration of nitrogen in the sealed space; a nitrogen generator configured to supply nitrogen to the sealed space, including an air compressor and a nitrogen-oxygen separator, the air compressor controlledly supplying compressed air to the nitrogen-oxygen separator, The nitrogen-oxygen separator is used to prepare nitrogen using compressed air; the air compressor is further configured to continue to operate so that the nitrogen-oxygen separator continues to generate nitrogen until the nitrogen concentration reaches a predetermined value, wherein the nitrogen concentration is greater than a preset first concentration threshold a second concentration threshold; if the nitrogen concentration is less than the first concentration threshold, operating in an intermittent manner in which the second predetermined time is turned off after the first preset time is turned on, the second concentration threshold is greater than the first concentration threshold; and the nitrogen is The concentration
  • the refrigerating and freezing device further includes: an air compressor temperature sensor configured to detect an operating temperature of the air compressor; and the air compressor is further configured to operate at a temperature greater than the first during the continuous operation of the air compressor In the case of the preset temperature, the intermittent operation is performed by turning off the fourth preset time after the third preset time is turned on; and the nitrogen concentration sensor is further configured to re-detect the seal after the air compressor is turned off for the fourth preset time each time. The concentration of nitrogen inside the space.
  • the above refrigerating and freezing apparatus further comprises: a refrigeration detecting device configured to detect whether the refrigeration compressor of the refrigerating and freezing device is turned on; and the air compressor is further configured to be turned on in the refrigerating compressor In this case, the air compressor is kept off; the nitrogen concentration sensor is also configured to re-detect the concentration of nitrogen inside the sealed space after the refrigeration compressor is turned off.
  • the air compressor is further configured to be turned off after the nitrogen concentration reaches a second concentration threshold; and the nitrogen concentration sensor is further configured to re-detect the concentration of nitrogen inside the sealed space after the air compressor is turned off for a fifth predetermined time .
  • the refrigerating and freezing apparatus further includes: a compartment temperature sensor configured to detect a storage temperature of the storage compartment; and the air compressor is further configured to close when the storage temperature is greater than the second preset temperature The refrigeration compressor is further configured to wait for the air compressor to be turned off and then turned on when the storage temperature is greater than the second preset temperature.
  • the invention provides a control method for a refrigerating and freezing device.
  • the storage room of the refrigerating and freezing device is provided with a sealed space, and the nitrogen generating device fills the sealed space with nitrogen to enhance the fresh-keeping effect.
  • the above control method comprises: detecting a nitrogen concentration inside the sealed space; determining whether the nitrogen concentration is greater than a preset first concentration threshold; if so, controlling the air compressor to continue working to cause the nitrogen-oxygen separator to continuously generate nitrogen, and if not, controlling the air pressure
  • the machine works in an intermittent manner in which the first preset time is turned on and the second preset time is turned off.
  • the nitrogen concentration in the sealed space detected by the concentration sensor is higher than the first concentration threshold, it indicates that the nitrogen in the sealed space is close to saturation, and the nitrogen generator can raise the nitrogen concentration to the target concentration threshold in a short time, in this case, The air compressor can continue to work until the nitrogen concentration is raised to the target concentration threshold and then stopped. The air compressor will not rise too high due to the short working time.
  • the nitrogen concentration in the sealed space detected by the concentration sensor is lower than the first concentration threshold, it indicates that the nitrogen generator needs a long time to raise the nitrogen concentration to the second concentration threshold. In this case, if the air compressor continues for a long time. The work will cause the temperature to rise too high.
  • the air compressor works according to the intermittent mode of turning off the second preset time after the first preset time is turned on, and the natural cooling and cooling is performed by the second preset time to slow down the air compressor.
  • the temperature rise rate prevents the high temperature from causing damage to the air compressor, ensuring the normal operation of the nitrogen generator, and preventing the nitrogen temperature of the nitrogen generator from being too high, causing the temperature of the sealed space to rise, affecting food preservation, thereby improving the work of the nitrogen generator. reliability.
  • the method of the present invention shuts down the air compressor after the nitrogen concentration reaches a second concentration threshold.
  • the nitrogen production time By setting the nitrogen production time by detecting the nitrogen concentration, it is possible to accurately control the working time of the nitrogen generator of the refrigerating and freezing equipment. Thereby preventing the nitrogen production time from being too long, wasting energy, or preventing the nitrogen production time from being too short, and failing to reach the nitrogen concentration that satisfies the food preservation.
  • the control method of the present invention further comprises: detecting whether the refrigeration compressor of the refrigerating and freezing device is turned on; if so, maintaining the air pressure mechanism The step of closing and detecting the concentration of nitrogen inside the sealed space is performed after the refrigeration compressor is turned off.
  • the control method of the refrigerating and freezing apparatus of the present invention does not allow the refrigerating compressor and the air compressor to operate at the same time.
  • the refrigeration detecting device detects that the refrigeration compressor is turned on, the closed state of the air compressor is maintained, and the operating noise of the refrigerating and freezing device is reduced.
  • 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 view of a refrigerating and freezing apparatus according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • FIG. 4 is a flow chart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention
  • FIG. 5 is a flow chart of a 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.
  • the refrigerating and freezing device may be a refrigerator, a freezer, or the like.
  • the refrigerating and freezing apparatus of the present embodiment includes a sealed box 100, a nitrogen concentration sensor 300, and a nitrogen generator 200.
  • a sealed box 100 is provided, and the sealed box 100 defines a sealed space for storing foods that need to be kept for a long time.
  • a nitrogen generator 200 is disposed inside the refrigerating and freezing device to supply nitrogen gas to the sealed space, so that the concentration of nitrogen in the sealed space reaches a target concentration threshold, and the target concentration threshold is much higher than the concentration of nitrogen in the air, thus, the oxygen concentration in the sealed space Far below the air level, it can inhibit the aerobic respiration and microbial growth of the food itself, which is conducive to food preservation.
  • the nitrogen generator 200 includes an air compressor 210 and a nitrogen-oxygen separator 220 that is controlled to supply compressed air to the nitrogen-oxygen separator 220 to cause the nitrogen-oxygen separator 220 to produce nitrogen using compressed air.
  • the nitrogen generator 200 of the present embodiment uses the PSA nitrogen production method to remove oxygen in the air to produce pure nitrogen.
  • Pressure swing adsorption PSA Pressure Swing Adsorption
  • the body means that the mixed gas is pressurized under the condition of constant temperature, and the excess impurity gas is adsorbed by the adsorbent to obtain a relatively pure single gas, and then the pressure is reduced by vacuum (vacuum) or atmospheric pressure.
  • the impurity gas in the agent is desorbed to make secondary use of the adsorbent.
  • the oxygen adsorbent of the present embodiment is disposed inside the nitrogen-oxygen separator 220.
  • the nitrogen-oxygen separator 220 uses air as a raw material, and uses pressure swing adsorption technology to selectively adsorb oxygen and nitrogen by the adsorbent to realize nitrogen in the air.
  • the oxygen is separated to produce pure nitrogen.
  • a nitrogen concentration sensor 300 is disposed in the sealed space for detecting the concentration of nitrogen in the sealed space.
  • an oxygen concentration sensor can also be used to detect the oxygen concentration in the sealed space and then calculate the nitrogen concentration based on the oxygen concentration.
  • the refrigerating and freezing apparatus of this embodiment determines the operation mode of the air compressor 210 based on the nitrogen concentration detected by the nitrogen concentration sensor 300.
  • the air compressor 210 continues to operate in the case where the nitrogen concentration is greater than the preset first concentration threshold, so that the nitrogen-oxygen separator 220 continues to generate nitrogen until the nitrogen concentration reaches a preset second concentration threshold;
  • the intermittent operation is performed according to the second preset time after the first preset time is turned on, and the second concentration threshold is greater than the first concentration threshold.
  • the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space after the air compressor 210 is turned off for the second predetermined time.
  • the second concentration threshold is a target concentration threshold for filling the inside of the sealed space, which may be 95% to 100%, and is preferably 99% in the embodiment; the first concentration threshold is close to and smaller than the second concentration threshold, so that The nitrogen generator 200 is capable of raising the nitrogen concentration of the sealed space from the first concentration threshold to the second concentration threshold in a short time, and the first concentration threshold may be 83% to 88%, and is preferably 85% in the present embodiment.
  • the nitrogen concentration in the sealed space detected by the concentration sensor is higher than the first concentration threshold, it indicates that the nitrogen in the sealed space is near saturation, and the nitrogen generator 200 can raise the nitrogen concentration to the second concentration threshold in a short time, in which case
  • the air compressor 210 can continue to work until the nitrogen concentration is raised to the second concentration threshold and then stopped.
  • the air compressor 210 does not rise too high due to the short working time.
  • the nitrogen concentration of the sealed space detected by the concentration sensor is lower than the first concentration threshold, it indicates that the nitrogen generator 200 takes a long time to raise the nitrogen concentration to the second concentration threshold. In this case, if the air compressor 210 continues The work will cause its temperature to rise too high.
  • the air compressor 210 works in an intermittent manner in which the second preset time is turned off after the first preset time is turned on, and the second preset time is used to cool naturally and cool down to slow down.
  • the first preset time may be the time required for the air compressor 210 to rise from the normal temperature to the excessive temperature in the continuous working state
  • the second preset time may be that the air compressor 210 is cooled from the excessive temperature to the normal temperature. It takes time.
  • the air compressor 210 can work for 10 minutes, and pause for 5 minutes.
  • the first preset time and the second preset time may be the same.
  • the air compressor 210 may work for 10 minutes and pause for 10 minutes. The way you work.
  • the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space after the air compressor 210 is turned off for a second predetermined time in a state where the air compressor 210 is intermittently operated to re-determine the operation mode of the air compressor 210.
  • the air compressor 210 is also turned off after the nitrogen concentration reaches the second concentration threshold to save energy; and the nitrogen concentration sensor 300 re-detects the sealed space after the air compressor 210 is turned off for the fifth preset time.
  • the concentration of internal nitrogen Due to the user opening the sealed box 100 or leaking naturally, the concentration of nitrogen in the sealed space may decrease with time.
  • the concentration of nitrogen inside the sealed space is re-detected to re-determine the air.
  • the fifth preset time may be set according to the time required for the nitrogen concentration of the sealed space to naturally drop from the second concentration threshold to the concentration that affects the freshness of the food.
  • the above control of the air compressor 210 is based on the case where the sealed casing 100 is not opened. If the sealed casing 100 is opened, it is waited for its closing to re-detect the concentration of nitrogen inside the sealed space.
  • FIG. 2 is a schematic view of a refrigerating and freezing apparatus according to another embodiment of the present invention.
  • the refrigerating and freezing apparatus of this embodiment further includes an air compressor temperature sensor 400.
  • the air compressor temperature sensor 400 detects the operating temperature of the air compressor 210; and in the process of continuous operation of the air compressor 210, when the working temperature is greater than the first preset temperature, the third preset time is turned off after the third preset time is turned on. Intermittent mode of operation at four preset times.
  • the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space after the air compressor 210 is turned off for the fourth predetermined time each time.
  • the first preset temperature is that the air compressor 210 continues to work for a long time, and the temperature rises to affect the temperature during normal operation. In the present embodiment, it may be 45 to 55 ° C, for example, 50 ° C.
  • the refrigerating and freezing apparatus in this embodiment can also determine the operation mode of the air compressor 210 in accordance with the temperature of the air compressor 210 itself to prevent the air pressure temperature from rising too high.
  • the temperature thereof is also continuously increased, and it is easy to cause the temperature of the air compressor 210 to rise too high to affect its use. Therefore, during the continuous operation of the air compressor 210, the air compressor temperature sensor 400 detects the operating temperature of the air compressor 210, and when the operating temperature is greater than the first preset temperature, the air compressor 210 needs to be appropriately cooled.
  • the fourth preset time is turned off, and the fourth preset time is used to naturally cool down, so as to prevent the temperature of the air compressor 210 from rising too high.
  • the third preset time may be set according to the time required for the air compressor 210 to rise from the normal temperature to the excessive temperature in the continuous working state, and the fourth preset time may be rooted. According to the time required for the air compressor 210 to be cooled down to the normal temperature by excessive temperature, for example, the air compressor 210 can be operated for 10 minutes, suspended for 5 minutes, or can be operated for 5 minutes, suspended for 10 minutes.
  • the third preset time and the fourth preset time may be the same.
  • the air compressor 210 may adopt a mode of working for 10 minutes and suspending the cyclic operation of 10 minutes.
  • the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space after the air compressor 210 is turned off for a fourth predetermined time in a state where the air compressor 210 is intermittently operated to re-determine the operation mode of the air compressor 210.
  • the refrigerating and freezing apparatus of this embodiment further includes: a refrigeration detecting device 600.
  • the refrigeration detecting device 600 detects whether or not the refrigeration compressor 500 of the refrigerating and freezing apparatus is turned on.
  • the refrigeration detecting device 600 can determine whether the refrigeration compressor 500 is turned on by detecting the status flag of the main control board of the refrigerating and freezing apparatus.
  • the air compressor 210 keeps the air compressor 210 closed when the refrigeration compressor 500 is turned on; the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space after the refrigeration compressor 500 is turned off.
  • the refrigerating and freezing apparatus of the present embodiment controls the refrigerating compressor 500 and the air compressor 210 to operate at different times in order to reduce their own energy consumption load.
  • the refrigeration detecting device 600 detects that the refrigeration compressor 500 is turned on, the closed state of the air compressor 210 is maintained. In this case, it is not necessary to detect the nitrogen gas concentration and the operating temperature of the air compressor 210.
  • the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space.
  • the refrigerating and freezing apparatus of this embodiment further includes a compartment temperature sensor.
  • the compartment temperature sensor detects the storage temperature of the storage compartment; and the air compressor 210 is closed when the storage temperature is greater than the second preset temperature; the refrigeration compressor 500 is further configured to have a storage temperature greater than the second pre-condition In the case of the temperature, the air compressor 210 is turned off and then turned on.
  • the second preset temperature is the highest value allowed by the storage compartment, and when the storage temperature exceeds the second preset temperature, the preservation effect of the food is affected.
  • the refrigerating and freezing apparatus of the present embodiment prepares to turn on the refrigerating compressor 500 to lower the storage temperature if the storage temperature is greater than the second preset temperature. Before that, the air compressor 210 is previously closed to prevent the refrigerating compressor 500 and The air compressor 210 is simultaneously turned on to cause the refrigerating and freezing equipment to exceed its energy consumption load.
  • the invention also provides a control method for a refrigerating and freezing device.
  • the inside of the storage compartment of the refrigerating and freezing apparatus is provided with a sealed space, and the refrigerating and freezing apparatus is provided with a nitrogen generating device for supplying nitrogen to the sealed space, and the nitrogen generating device includes an air compressor and a nitrogen-oxygen separator, wherein the air compressor Controlled supply of compressed air to the nitrogen-oxygen separator allows the nitrogen-oxygen separator to use compressed air to produce nitrogen.
  • Figure 3 is a schematic view of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention.
  • step S302 the concentration of nitrogen inside the sealed space is detected.
  • the nitrogen concentration inside the sealed space is detected by the nitrogen concentration sensor 300 inside the sealed space.
  • Step S304 determining whether the nitrogen concentration is greater than a preset first concentration threshold.
  • the first concentration threshold is close to and smaller than a target concentration threshold of nitrogen filling in the sealed space, so that the nitrogen generator 200 can raise the nitrogen concentration of the sealed space from the first concentration threshold to the target concentration threshold in a short time, the first concentration
  • the threshold may be from 83% to 88%, preferably 85% in this embodiment.
  • step S306 if the result of the determination in the step S304 is YES, the control air compressor 210 is continuously operated to cause the nitrogen-oxygen separator 220 to continuously generate nitrogen gas. Until the nitrogen concentration reaches a preset second concentration threshold, the second concentration threshold is greater than the first concentration threshold. When the nitrogen concentration in the sealed space detected by the concentration sensor is higher than the first concentration threshold, it indicates that the nitrogen in the sealed space is near saturation, and the nitrogen generator 200 can raise the nitrogen concentration to the second concentration threshold in a short time, in which case Next, the air compressor 210 can continue to work until the nitrogen concentration is raised to the second concentration threshold and then stopped. The air compressor 210 does not rise too high due to the short working time.
  • the second concentration threshold is a target concentration threshold for filling the inside of the sealed space with nitrogen, and may be 95% to 100%, and is preferably 99% in the present embodiment.
  • Step S308 if the result of the determination in step S304 is no, the control air compressor 210 is turned on for a first preset time, so that the nitrogen-oxygen separator 220 prepares nitrogen gas in the preset time, and the first preset is turned on in the air compressor 210.
  • the step of detecting the concentration of nitrogen inside the sealed space is re-executed after a second predetermined time interval. When the nitrogen concentration of the sealed space detected by the concentration sensor is lower than the first concentration threshold, it indicates that the nitrogen generator 200 takes a long time to raise the nitrogen concentration to the second concentration threshold.
  • the air compressor 210 continues The operation will cause the temperature to rise too high, and the air compressor 210 works in an intermittent manner in which the second preset time is turned off after the first preset time is turned on, and the cooling is naturally cooled by the second preset time to slow down the temperature of the air compressor 210.
  • the first preset time may be set according to the time required for the air compressor 210 to rise from the normal temperature to the excessive temperature in the continuous working state, and the second preset time may be cooled by the air compressor 210 by the excessive temperature. It can be set to the time required for the normal temperature.
  • the air compressor 210 can work in a cyclic mode of 10 minutes, pause for 5 minutes, or can work in a cyclic mode of 5 minutes and pause for 10 minutes.
  • the first pre-prevention The set time may be the same as the second preset time.
  • the air compressor 210 may adopt a mode of working for 10 minutes and suspending the cycle operation of 10 minutes.
  • control method performs the following steps in sequence:
  • step S402 it is detected whether the refrigeration compressor 500 of the refrigerating and freezing apparatus is turned on.
  • step S404 if the result of the determination in step S402 is YES, the air compressor 210 is kept closed, and the refrigeration compressor 500 is turned off.
  • the refrigerating and freezing apparatus of the present embodiment controls the refrigerating compressor 500 and the air compressor 210 to operate at different times in order to reduce their own energy consumption load.
  • the refrigeration detecting device 600 detects that the refrigeration compressor 500 is turned on, the closed state of the air compressor 210 is maintained. In this case, it is not necessary to detect the nitrogen gas concentration and the operating temperature of the air compressor 210.
  • the nitrogen concentration sensor 300 re-detects the concentration of nitrogen inside the sealed space.
  • step S406 if the result of the determination in step S402 is NO, the concentration of nitrogen inside the sealed space is detected.
  • Step S408 determining whether the nitrogen concentration is greater than a preset first concentration threshold.
  • the first concentration threshold is close to and smaller than a target concentration threshold of nitrogen filling in the sealed space, so that the nitrogen generator 200 can raise the nitrogen concentration of the sealed space from the first concentration threshold to the target concentration threshold in a short time, the first concentration
  • the threshold may be from 83% to 88%, preferably 85% in this embodiment.
  • step S410 if the result of the determination in step S408 is YES, the control air compressor 210 is continuously operated to cause the nitrogen-oxygen separator 220 to continuously generate nitrogen gas.
  • the nitrogen concentration in the sealed space detected by the concentration sensor is higher than the first concentration threshold, it indicates that the nitrogen in the sealed space is near saturation, and the nitrogen generator 200 can raise the nitrogen concentration to the second concentration threshold in a short time, in which case Next, the air compressor 210 can continue to work until the nitrogen concentration is raised to the second concentration threshold and then stopped. The air compressor 210 does not rise too high due to the short working time.
  • Step S412 if the result of the determination in step S408 is no, the control air compressor 210 is turned on for a first preset time, so that the nitrogen-oxygen separator 220 prepares nitrogen gas in the preset time, and the first preset is turned on in the air compressor 210.
  • the step of detecting the concentration of nitrogen inside the sealed space is re-executed after a second predetermined time interval.
  • the nitrogen concentration of the sealed space detected by the concentration sensor is lower than the first concentration threshold, it indicates that the nitrogen generator 200 takes a long time to raise the nitrogen concentration to the second concentration threshold. In this case, if the air compressor 210 continues The work will cause its temperature to rise too high.
  • the air compressor 210 works in an intermittent manner in which the second preset time is turned off after the first preset time is turned on, and the second preset time is used to cool naturally and cool down to slow down.
  • the first preset time may be the time required for the air compressor 210 to rise from the normal temperature to the excessive temperature in the continuous working state, and the second preset time may be that the air compressor 210 is cooled from the excessive temperature to the normal temperature. Time is required, the first preset time and the second preset time may be the same, In the examples, it is preferably 10 min. After each time the air compressor 210 is temporarily closed, the step of detecting the concentration of nitrogen inside the sealed space is re-executed after the second predetermined time to re-determine the operation mode of the air compressor 210.
  • step S414 the operating temperature of the air compressor 210 is detected.
  • step S416 it is determined whether the temperature of the air compressor 210 is greater than the first preset temperature.
  • the refrigerating and freezing apparatus in this embodiment can also determine the operation mode of the air compressor 210 in accordance with the temperature of the air compressor 210 itself to prevent the air pressure temperature from rising too high. During the continuous operation of the air compressor 210, the temperature thereof is also continuously increased, and it is easy to cause the temperature of the air compressor 210 to rise too high to affect its use. Therefore, the operating temperature of the air compressor 210 is detected during its continuous operation.
  • the air compressor temperature sensor 400 detects the operating temperature of the air compressor 210. When the operating temperature is greater than the first preset temperature, the air compressor 210 needs to be appropriately cooled. It changes to an intermittent mode of operation, and the fourth preset time is turned off after the third preset time of operation, and the temperature is naturally cooled by the fourth preset time to prevent the temperature of the air compressor 210 from rising too high.
  • the third preset time may be set according to the time required for the air compressor 210 to rise from the normal temperature to the excessive temperature in the continuous working state, and the fourth preset time may be cooled by the air compressor 210 by the excessive temperature. It can be set to the time required for the normal temperature.
  • the air compressor 210 can work in a cyclic mode of 10 minutes, pause for 5 minutes, or work in a cyclic mode of 5 minutes and 10 minutes.
  • the third pre-operation The set time may be the same as the fourth preset time.
  • the air compressor 210 may adopt a mode of working for 10 minutes and suspending the cycle operation of 10 minutes.
  • Step S420 if the result of the determination in step S416 is negative, it is detected whether the nitrogen concentration is greater than a preset second concentration threshold. If the result of the determination is negative, the nitrogen concentration of the sealed space does not reach the target concentration threshold. In this case, the air compressor 210 is continuously turned on, and the sealed space is filled with nitrogen gas.
  • step S422 if the result of the determination in step S420 is YES, the air compressor 210 is turned off, and the step of detecting the nitrogen concentration inside the sealed space is re-executed after the air compressor 210 is turned off for the fifth predetermined time. Due to the user opening the sealed box 100 or leaking naturally, the concentration of nitrogen in the sealed space may decrease with time. Therefore, after the air compressor 210 is turned off for a fifth predetermined time, the concentration of nitrogen inside the sealed space is re-detected to re-determine the air. The manner in which the press 210 operates. The fifth preset time may be set according to the time required for the nitrogen concentration of the sealed space to naturally drop from the second concentration threshold to the concentration that affects the freshness of the food. The above control of the air compressor 210 is based on the fact that the sealed box 100 is not open. In the case of the case, if the sealed case 100 is opened, it is waited for its closing to re-detect the concentration of nitrogen inside the sealed space.
  • control method performs the following steps in sequence during the process of opening the air compressor for nitrogen production:
  • Step S502 detecting a storage temperature of the storage compartment.
  • Step S504 detecting whether the storage temperature is greater than a second preset temperature.
  • the second preset temperature is the highest value that allows the storage temperature to reach, and when the storage temperature exceeds the second preset temperature, the preservation effect of the food is affected. If the result of the determination is no, the storage temperature of the storage compartment is detected at intervals.
  • step S506 if the result of the detection in step S504 is YES, the air compressor 210 is turned off, and then the refrigeration compressor 500 is turned on.
  • the refrigerating and freezing apparatus of the present embodiment prepares to turn on the refrigerating compressor 500 to lower the storage temperature if the storage temperature is greater than the second preset temperature. Before that, the air compressor 210 is previously closed to prevent the refrigerating compressor 500 and The air compressor 210 is simultaneously turned on to cause the refrigerating and freezing equipment to exceed its energy consumption load. If the result of the detection in step S504 is NO, the storage temperature of the storage compartment is re-detected at intervals.
  • the embodiment provides a control method for the refrigerating and freezing device.
  • the storage room of the refrigerating and freezing device is provided with a sealed space, and the nitrogen generating device 200 is filled with nitrogen gas into the sealed space to enhance the fresh-keeping effect.
  • the control method includes: detecting a nitrogen concentration inside the sealed space; determining whether the nitrogen concentration is greater than a preset first concentration threshold; if so, controlling the air compressor 210 to continue to operate to cause the nitrogen-oxygen separator 220 to continuously generate nitrogen, and if not, controlling The air compressor 210 operates in an intermittent manner in which the first preset time is turned on and the second preset time is turned off.
  • the nitrogen concentration in the sealed space detected by the concentration sensor is higher than the first concentration threshold, it indicates that the nitrogen in the sealed space is near saturation, and the nitrogen generator 200 can raise the nitrogen concentration to the target concentration threshold in a short time, in which case The air compressor 210 can continue to work until the nitrogen concentration is raised to the target concentration threshold and is stopped. The air compressor 210 does not rise too high due to the short working time.
  • the nitrogen concentration of the sealed space detected by the concentration sensor is lower than the first concentration threshold, it indicates that the nitrogen generator 200 takes a long time to raise the nitrogen concentration to the second concentration threshold.
  • the air compressor 210 continues The operation will cause the temperature to rise too high, and the air compressor 210 works in an intermittent manner in which the second preset time is turned off after the first preset time is turned on, and the cooling is naturally cooled by the second preset time to slow down the temperature of the air compressor 210.
  • the rising speed prevents the high temperature from causing damage to the air compressor 210, ensures the normal operation of the nitrogen generating device 200, and prevents the nitrogen generating device 200 from generating too high a nitrogen temperature, causing the temperature of the sealed space to rise, affecting food preservation, thereby improving the nitrogen generating device. 200 working reliability.
  • the method of the present embodiment turns off the air compressor 210 after the nitrogen concentration reaches the second concentration threshold.
  • the nitrogen generation time By setting the nitrogen generation time by detecting the nitrogen concentration, it is possible to accurately control the working time of the nitrogen generator 200 of the refrigerating and freezing apparatus. Thereby preventing the nitrogen production time from being too long, wasting energy, or preventing the nitrogen production time from being too short, and failing to meet the nitrogen concentration requirement for food preservation.
  • the control method of the embodiment further includes: detecting whether the refrigeration compressor 500 of the refrigerating and freezing device is turned on; if so, keeping the air compressor 210 closed, and at the refrigeration compressor 500 After the shutdown, the step of detecting the concentration of nitrogen inside the sealed space is performed.
  • the refrigerating and freezing apparatus of the present embodiment controls the refrigerating compressor 500 and the air compressor 210 to operate at different times. When the refrigeration detecting device 600 detects that the refrigeration compressor 500 is turned on, the closed state of the air compressor 210 is maintained, and the operating noise of the refrigerating and freezing apparatus is reduced.

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Abstract

提供一种冷藏冷冻设备及其控制方法。控制方法包括，检测密封空间内部的氮气浓度；判断氮气浓度是否大于预设的第一浓度阈值；若是，控制空压机（210）持续工作产生氮气，若否，控制空压机（210）以开启第一预设时间、关闭第二预设时间的间歇方式工作。该方法防止高温对空压机（210）造成损害，保证制氮装置（200）正常工作。

Description

冷藏冷冻设备及其控制方法 技术领域
本发明涉及物品存储领域，特别涉及一种冷藏冷冻设备及其控制方法。
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一般通过经验设置一个固定的制氮时间，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，而且如果制氮装置持续长时间工作，会导致其工作温度急速上升，这样会影响其正常使用还会降低其使用寿命。同时，如果制氮装置自身温度过高，其产生的氮气温度也会过高，造成间室温度上升，影响食物保鲜。
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冷藏冷冻设备及其控制方法。
本发明一个进一步的目的是保证冷藏冷冻设备的制氮装置正常工作。
本发明一个进一步的目的是要提高冷藏冷冻设备的工作可靠性。
本发明的另一个进一步的目的是降低冷藏冷冻设备的工作噪音。
根据本发明的一个方面，本发明提供了一种冷藏冷冻设备的控制方法，冷藏冷冻设备的储物间室内部设置有密封空间，并且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，并且制氮装置包括空压机以及氮氧分离器，其中空压机受控地向氮氧分离器提供压缩空气，以使氮氧分离器使用压缩空气制备氮气，并且控制方法包括：检测密封空间内部的氮气浓度；判断氮气浓度是否大于预设的第一浓度阈值；若是，控制空压机持续工作以使得氮氧分离器持续产生氮气，直至氮气浓度达到预设的第二浓度阈值，第二浓度阈值大于第一浓度阈值；以及若否，控制空压机开启第一预设时间，使得氮氧分离器在该预设时间内制备氮气，并在空压机开启第一预设时间后关 闭，并间隔第二预设时间后重新执行检测密封空间内部氮气的浓度的步骤。
可选地，在控制空压机持续工作的过程中还包括：检测空压机的工作温度；在空压机的工作温度大于第一预设温度的情况下，控制空压机在启动第三预设时间后关闭，并在关闭第四预设时间后重新检测密封空间内部氮气的浓度；以及若否，执行检测密封空间内部氮气的浓度的步骤。
可选地，在检测密封空间内部氮气的浓度的步骤之前还包括：检测冷藏冷冻设备的制冷压缩机是否开启；若是，保持空压机关闭，并在制冷压缩机关闭后执行检测密封空间内部氮气的浓度的步骤。
可选地，在氮气浓度达到第二浓度阈值后关闭空压机，在空压机关闭达到第五预设时间后重新执行检测密封空间内部的氮气浓度的步骤。
可选地，在开启空压机进行制氮的过程还包括：检测储物间室的储物温度；判断储物温度是否大于第二预设温度；若是，关闭空压机，然后开启制冷压缩机。
根据本发明的另一个方面，还提供了一种冷藏冷冻设备，包括：密封盒，设置于冷藏冷冻设备的储物间室内部，密封盒限定出密封空间；氮气浓度传感器，设置于密封空间内，配置成检测密封空间内的氮气浓度；制氮装置，配置成向密封空间提供氮气，其包括空压机和氮氧分离器，空压机受控地向氮氧分离器提供压缩空气，以使氮氧分离器使用压缩空气制备氮气；空压机还配置成，在氮气浓度大于预设的第一浓度阈值的情况下，持续工作以使得氮氧分离器持续产生氮气，直至氮气浓度达到预设的第二浓度阈值；在氮气浓度小于第一浓度阈值的情况下，按照开启第一预设时间后关闭第二预设时间的间歇方式工作，第二浓度阈值大于第一浓度阈值；并且氮气浓度传感器还配置成，在空压机每次关闭第二预设时间后重新检测密封空间内部氮气的浓度。
可选地，上述冷藏冷冻设备还包括：空压机温度传感器，配置成检测空压机的工作温度；并且空压机还配置成，在空压机持续工作的过程中，工作温度大于第一预设温度的情况下，按照开启第三预设时间后关闭第四预设时间的间歇方式工作；以及氮气浓度传感器还配置成，在空压机每次关闭第四预设时间后重新检测密封空间内部氮气的浓度。
可选地，上述冷藏冷冻设备还包括：制冷检测装置，配置成检测冷藏冷冻设备的制冷压缩机是否开启；并且空压机还配置成，在制冷压缩机开启的 情况下，保持空压机关闭；氮气浓度传感器还配置成，在制冷压缩机关闭后重新检测密封空间内部氮气的浓度。
可选地，空压机还配置成，在氮气浓度达到第二浓度阈值后关闭；并且氮气浓度传感器还配置成，在空压机关闭到达第五预设时间后重新检测密封空间内部氮气的浓度。
可选地，上述冷藏冷冻设备还包括：间室温度传感器，配置成检测储物间室的储物温度；并且空压机还配置成，在储物温度大于第二预设温度的情况下关闭；制冷压缩机还配置成，在储物温度大于第二预设温度的情况下，等待空压机关闭后开启。
本发明提供了一种冷藏冷冻设备的控制方法，该冷藏冷冻设备的储物间室内设置有密封空间，制氮装置向密封空间内充入氮气以加强其保鲜效果。上述控制方法包括：检测密封空间内部的氮气浓度；判断氮气浓度是否大于预设的第一浓度阈值；若是，控制空压机持续工作以使得氮氧分离器持续产生氮气，若否，控制空压机以开启第一预设时间、关闭第二预设时间的间歇方式工作。在浓度传感器检测出的密封空间氮气浓度高于第一浓度阈值时，说明密封空间内的氮气接近饱和，制氮装置能够在短时间内将氮气浓度提升至目标浓度阈值，在这种情况下，空压机可以持续工作直至将氮气浓度提升至目标浓度阈值后再停机，空压机由于持续工作时间短，温度不会上升过高。在浓度传感器检测出的密封空间氮气浓度低于第一浓度阈值时，说明制氮装置需要较长时间才能将氮气浓度提升至第二浓度阈值，在这种情况下，空压机如果长时间持续工作将导致其温度上升过高，此时，空压机按照开启第一预设时间后关闭第二预设时间的间歇方式工作，利用第二预设时间自然冷却降温，以减缓空压机的温度上升速度，防止高温对空压机造成损害，保证了制氮装置正常工作，同时防止制氮装置产生氮气温度过高，造成密封空间温度上升，影响食物保鲜，从而提高了制氮装置的工作可靠性。
另外，本发明的方法在氮气浓度达到第二浓度阈值后关闭空压机。通过检测氮气浓度制定制氮时间，能够准确控制冷藏冷冻设备的制氮装置的工作时长。从而防止制氮时间过长，浪费能源，或者防止制氮时间过短，不能达到满足食物保鲜的氮气浓度。
进一步地，本发明的控制方法在检测密封空间内部氮气的浓度的步骤之前还包括：检测冷藏冷冻设备的制冷压缩机是否开启；若是，保持空压机关 闭，并在制冷压缩机关闭后执行检测密封空间内部氮气的浓度的步骤。本发明的冷藏冷冻设备的控制方法不允许制冷压缩机和空压机在同一时间运行。在制冷检测装置检测到制冷压缩机开启时，保持空压机的关闭状态，减小了冷藏冷冻设备的工作噪音。
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是根据本发明另一个实施例的冷藏冷冻设备的示意图；
图3是根据本发明一个实施例的冷藏冷冻设备的控制方法的示意图；
图4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；以及
图5是根据本发明另一个实施例的冷藏冷冻设备的控制方法的流程图。
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。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包括：密封盒100、氮气浓度传感器300以及制氮装置200。在本实施例的冷藏冷冻设备的储物间室内部设置有密封盒100，密封盒100限定出密封空间，该密封空间用于储藏需要长时间保鲜的食品。冷藏冷冻设备内部设置有制氮装置200，向密封空间提供氮气，以使得密封空间内的氮气浓度达到目标浓度阈值，目标浓度阈值远高于空气中的氮气浓度值，因此，密封空间内氧气浓度远低于空气水平，能够抑制食物自身的有氧呼吸和微生物的生长，有利于食物保鲜。制氮装置200包括空压机210和氮氧分离器220，空压机210受控地向氮氧分离器220提供压缩空气，以使氮氧分离器220使用压缩空气制备氮气。本实施例的制氮装置200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)是目前生产气体的一项主流技术。变压吸附具 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。本实施例的氧气吸附剂设置于氮氧分离器220内部，氮氧分离器220以空气为原料，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。密封空间内设置有氮气浓度传感器300，用于检测密封空间内的氮气浓度。在一些可选的实施例中，也可以使用氧气浓度传感器检测密封空间内氧气浓度，再根据氧气浓度计算出氮气浓度。
本实施例的冷藏冷冻设备依据氮气浓度传感器300检测出的氮气浓度确定空压机210的工作方式。上述空压机210在氮气浓度大于预设的第一浓度阈值的情况下，持续工作以使得氮氧分离器220持续产生氮气，直至氮气浓度达到预设的第二浓度阈值；在氮气浓度小于第一浓度阈值的情况下，按照开启第一预设时间后关闭第二预设时间的间歇方式工作，第二浓度阈值大于第一浓度阈值。并且氮气浓度传感器300在空压机210每次关闭第二预设时间后重新检测密封空间内部氮气的浓度。上述第二浓度阈值为密封空间内部充入氮气的目标浓度阈值，可以为95％至100％，在本实施例中优选为99％；上述第一浓度阈值接近且小于第二浓度阈值，以使得制氮装置200能够在短时间内将密封空间的氮气浓度由第一浓度阈值提升至第二浓度阈值，第一浓度阈值可以为83％至88％，在本实施例中优选为85％。
在浓度传感器检测出的密封空间氮气浓度高于第一浓度阈值时，说明密封空间内的氮气接近饱和，制氮装置200能够在短时间内将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210可以持续工作直至将氮气浓度提升至第二浓度阈值后再停机，空压机210由于持续工作时间短，温度不会上升过高。在浓度传感器检测出的密封空间氮气浓度低于第一浓度阈值时，说明制氮装置200需要较长时间才能将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210如果持续工作将导致其温度上升过高，在这种情况下，空压机210按照开启第一预设时间后关闭第二预设时间的间歇方式工作，利用第二预设时间自然冷却降温，以减缓空压机210的温度上升速度。上述第一预设时间可以为空压机210在持续工作状态下由正常温度上升至过高温度所需时间，第二预设时间可以为空压机210由过高温度冷却下降至正常温度所需时间。例如空压机210可以采用工作10min，暂停5min的循环方式工 作，也可以采用工作5min，暂停10min的循环方式工作，在一些实施例中，上述第一预设时间与第二预设时间可以相同，例如空压机210可以采用工作10min，暂停10min的循环工作的方式。
氮气浓度传感器300在空压机210间歇工作的状态下，在空压机210关闭第二预设时间后重新检测密封空间内部氮气的浓度，以重新确定空压机210的工作方式。另外，在本实施例中，空压机210还在氮气浓度达到第二浓度阈值后关闭以节省能源；并且氮气浓度传感器300还在空压机210关闭到达第五预设时间后重新检测密封空间内部氮气的浓度。由于用户打开密封盒100或者自然泄露等原因，密封空间内的氮气浓度会随时间下降，因此在空压机210关闭到达第五预设时间后重新检测密封空间内部氮气的浓度，以重新确定空压机210的工作方式。上述第五预设时间可以根据密封空间的氮气浓度由第二浓度阈值自然下降到影响食物保鲜的浓度的所需时间进行设定。以上对空压机210的控制均基于密封盒100未开启的情况下，如果密封盒100开启，则等待其关闭后重新检测密封空间内部氮气的浓度。
图2是根据本发明另一个实施例的冷藏冷冻设备的示意图。本实施例的冷藏冷冻设备还包括：空压机温度传感器400。
空压机温度传感器400检测空压机210的工作温度；并且空压机210在其持续工作的过程中，工作温度大于第一预设温度的情况下，按照开启第三预设时间后关闭第四预设时间的间歇方式工作。氮气浓度传感器300在空压机210每次关闭第四预设时间后重新检测密封空间内部氮气的浓度。上述第一预设温度为空压机210由于长时间持续工作，温度上升到影响其正常工作时的温度。在本实施例中可以为45至55℃，例如为50℃。
本实施例中的冷藏冷冻设备还能够依据空压机210自身的温度确定空压机210的工作方式，以防止空压温度上升过高。在空压机210持续工作的过程中，其温度也不断升高，容易出现空压机210温度上升过高从而影响其使用的情况。因此，在空压机210持续工作的过程中，空压机温度传感器400检测空压机210的工作温度，在其工作温度大于第一预设温度的情况下，说明空压机210需要适当降温，将其改变为间歇式的工作方式，在工作第三预设时间后关闭第四预设时间，并利用第四预设时间自然冷却降温，以防止空压机210温度上升过高。上述第三预设时间可以根据空压机210在持续工作状态下由正常温度上升至过高温度所需的时间来设定，第四预设时间可以根 据空压机210由过高温度冷却下降至正常温度所需时间来设定，例如空压机210可以采用工作10min，暂停5min的循环方式工作，也可以采用工作5min，暂停10min的循环方式工作，在一些实施例中，上述第三预设时间与第四预设时间可以相同，例如空压机210可以采用工作10min，暂停10min的循环工作的方式。
氮气浓度传感器300在空压机210间歇工作的状态下，在空压机210关闭第四预设时间后重新检测密封空间内部氮气的浓度，以重新确定空压机210的工作方式。
本实施例冷藏冷冻设备的还包括：制冷检测装置600。制冷检测装置600检测冷藏冷冻设备的制冷压缩机500是否开启。制冷检测装置600可以通过检测冷藏冷冻设备主控板的状态标识确定制冷压缩机500是否开启。
空压机210在制冷压缩机500开启的情况下，保持空压机210关闭；氮气浓度传感器300在制冷压缩机500关闭后重新检测密封空间内部氮气的浓度。
本实施例的冷藏冷冻设备为了减小自身的能耗负载，控制制冷压缩机500和空压机210在不同时间运行。在制冷检测装置600检测到制冷压缩机500开启时，保持空压机210的关闭状态，在这种情况下，无需检测氮气浓度以及空压机210的工作温度。在制冷检测装置600确定制冷压缩机500已经关闭后，氮气浓度传感器300再检测密封空间内部氮气的浓度。
本实施例的冷藏冷冻设备还包括间室温度传感器。间室温度传感器检测储物间室的储物温度；并且空压机210在储物温度大于第二预设温度的情况下关闭；制冷压缩机500还配置成，在储物温度大于第二预设温度的情况下，等待空压机210关闭后开启。上述第二预设温度为储物间室允许达到的最高值，当储物温度超过第二预设温度时，会影响食物的保鲜效果。本实施例的冷藏冷冻设备在储物温度大于第二预设温度的情况下准备开启制冷压缩机500以降低储物温度，在此之前，预先关闭空压机210，以防止制冷压缩机500和空压机210同时开启使冷藏冷冻设备超过其能耗负载。
本发明还提供了一种冷藏冷冻设备的控制方法。该冷藏冷冻设备的储物间室内部设置有密封空间，并且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，并且制氮装置包括空压机以及氮氧分离器，其中空压机受控地向氮氧分离器提供压缩空气，以使氮氧分离器使用压缩空气制备氮气。图 3是根据本发明一个实施例的冷藏冷冻设备的控制方法的示意图。
步骤S302，检测密封空间内部的氮气浓度。利用密封空间内部的氮气浓度传感器300检测密封空间内部的氮气浓度。
步骤S304，判断氮气浓度是否大于预设的第一浓度阈值。上述第一浓度阈值接近且小于密封空间内氮气充入的目标浓度阈值，以使得制氮装置200能够在短时间内将密封空间的氮气浓度由第一浓度阈值提升至目标浓度阈值，第一浓度阈值可以为83％至88％，在本实施例中优选为85％。
步骤S306，若步骤S304的判断结果为是，控制空压机210持续工作以使得氮氧分离器220持续产生氮气。直至氮气浓度达到预设的第二浓度阈值，第二浓度阈值大于第一浓度阈值。在浓度传感器检测出的密封空间氮气浓度高于第一浓度阈值时，说明密封空间内的氮气接近饱和，制氮装置200能够在短时间内将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210可以持续工作直至将氮气浓度提升至第二浓度阈值后再停机，空压机210由于持续工作时间短，温度不会上升过高。上述第二浓度阈值为密封空间内部充入氮气的目标浓度阈值，可以为95％至100％，在本实施例中优选为99％。
步骤S308，若步骤S304的判断结果为否，控制空压机210开启第一预设时间，使得氮氧分离器220在该预设时间内制备氮气，并在空压机210开启第一预设时间后关闭，并间隔第二预设时间后重新执行检测密封空间内部氮气的浓度的步骤。在浓度传感器检测出的密封空间氮气浓度低于第一浓度阈值时，说明制氮装置200需要较长时间才能将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210如果持续工作将导致其温度上升过高，空压机210按照开启第一预设时间后关闭第二预设时间的间歇方式工作，利用第二预设时间自然冷却降温，以减缓空压机210的温度上升速度。上述第一预设时间可以根据空压机210在持续工作状态下由正常温度上升至过高温度所需的时间来设定，第二预设时间可以根据空压机210由过高温度冷却下降至正常温度所需时间来设定，例如空压机210可以采用工作10min，暂停5min的循环方式工作，也可以采用工作5min，暂停10min的循环方式工作，在一些实施例中，上述第一预设时间与第二预设时间可以相同，例如空压机210可以采用工作10min，暂停10min的循环工作的方式。
图4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S402，检测冷藏冷冻设备的制冷压缩机500是否开启。
步骤S404，若步骤S402的判断结果为是，则保持空压机210关闭，等待制冷压缩机500关闭。本实施例的冷藏冷冻设备为了减小自身的能耗负载，控制制冷压缩机500和空压机210在不同时间运行。在制冷检测装置600检测到制冷压缩机500开启时，保持空压机210的关闭状态，在这种情况下，无需检测氮气浓度以及空压机210的工作温度。在制冷检测装置600确定制冷压缩机500已经关闭后，氮气浓度传感器300再检测密封空间内部氮气的浓度。
步骤S406，若步骤S402的判断结果为否，检测密封空间内部的氮气浓度。
步骤S408，判断氮气浓度是否大于预设的第一浓度阈值。上述第一浓度阈值接近且小于密封空间内氮气充入的目标浓度阈值，以使得制氮装置200能够在短时间内将密封空间的氮气浓度由第一浓度阈值提升至目标浓度阈值，第一浓度阈值可以为83％至88％，在本实施例中优选为85％。
步骤S410，若步骤S408的判断结果为是，控制空压机210持续工作以使得氮氧分离器220持续产生氮气。在浓度传感器检测出的密封空间氮气浓度高于第一浓度阈值时，说明密封空间内的氮气接近饱和，制氮装置200能够在短时间内将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210可以持续工作直至将氮气浓度提升至第二浓度阈值后再停机，空压机210由于持续工作时间短，温度不会上升过高。
步骤S412，若步骤S408的判断结果为否，控制空压机210开启第一预设时间，使得氮氧分离器220在该预设时间内制备氮气，并在空压机210开启第一预设时间后关闭，并间隔第二预设时间后重新执行检测密封空间内部氮气的浓度的步骤。在浓度传感器检测出的密封空间氮气浓度低于第一浓度阈值时，说明制氮装置200需要较长时间才能将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210如果持续工作将导致其温度上升过高，在这种情况下，空压机210按照开启第一预设时间后关闭第二预设时间的间歇方式工作，利用第二预设时间自然冷却降温，以减缓空压机210的温度上升速度。上述第一预设时间可以为空压机210在持续工作状态下由正常温度上升至过高温度所需时间，第二预设时间可以为空压机210由过高温度冷却下降至正常温度所需时间，上述第一预设时间与第二预设时间可以相同，在本实 施例中均优选为10min。在空压机210每次暂停关闭后，既第二预设时间后重新执行检测密封空间内部氮气的浓度的步骤以重新确定空压机210的工作方式。
步骤S414，检测空压机210的工作温度。
步骤S416，判断空压机210的温度是否大于第一预设温度。本实施例中的冷藏冷冻设备还能够依据空压机210自身的温度确定空压机210的工作方式，以防止空压温度上升过高。在空压机210持续工作的过程中，其温度也不断升高，容易出现空压机210温度上升过高从而影响其使用的情况。因此在空压机210持续工作的过程中检测其工作温度。
步骤S418，若步骤S416的判断结果为是，控制空压机210在启动第三预设时间后关闭，并在关闭第四预设时间后重新检测密封空间内部氮气的浓度。在空压机210持续工作的过程中，空压机温度传感器400检测空压机210的工作温度，在其工作温度大于第一预设温度的情况下，说明空压机210需要适当降温，将其改变为间歇式的工作方式，在工作第三预设时间后关闭第四预设时间，并利用第四预设时间自然冷却降温，以防止空压机210温度上升过高。上述第三预设时间可以根据空压机210在持续工作状态下由正常温度上升至过高温度所需的时间来设定，第四预设时间可以根据空压机210由过高温度冷却下降至正常温度所需时间来设定，例如空压机210可以采用工作10min，暂停5min的循环方式工作，也可以采用工作5min，暂停10min的循环方式工作，在一些实施例中，上述第三预设时间与第四预设时间可以相同，例如空压机210可以采用工作10min，暂停10min的循环工作的方式。
步骤S420，若步骤S416的判断结果为否，检测氮气浓度是否大于预设的第二浓度阈值。若判断结果为否，密封空间的氮气浓度未达到目标浓度阈值，在这种情况下，持续开启空压机210，并向密封空间充入氮气。
步骤S422，若步骤S420的判断结果为是，关闭空压机210，在空压机210关闭达到第五预设时间后重新执行检测密封空间内部的氮气浓度的步骤。由于用户打开密封盒100或者自然泄露等原因，密封空间内的氮气浓度会随时间下降，因此在空压机210关闭到达第五预设时间后重新检测密封空间内部氮气的浓度，以重新确定空压机210的工作方式。上述第五预设时间可以根据密封空间的氮气浓度由第二浓度阈值自然下降到影响食物保鲜的浓度的所需时间进行设定。以上对空压机210的控制均基于密封盒100未开 启的情况下，如果密封盒100开启，则等待其关闭后重新检测密封空间内部氮气的浓度。
图5是根据本发明另一个实施例的冷藏冷冻设备的控制方法的流程图。该控制方法在开启空压机进行制氮的过程中依次执行以下步骤：
步骤S502，检测储物间室的储物温度。
步骤S504，检测储物温度是否大于第二预设温度。上述第二预设温度为允许储物温度达到的最高值，当储物温度超过第二预设温度时，会影响食物的保鲜效果。若判断结果为否，间隔一段时间再检测储物间室的储物温度。
步骤S506，若步骤S504的检测结果为是，关闭空压机210，然后开启制冷压缩机500。本实施例的冷藏冷冻设备在储物温度大于第二预设温度的情况下准备开启制冷压缩机500以降低储物温度，在此之前，预先关闭空压机210，以防止制冷压缩机500和空压机210同时开启使冷藏冷冻设备超过其能耗负载。若步骤S504的检测结果为否，间隔一段时间重新检测储物间室的储物温度。
本实施例提供了一种冷藏冷冻设备的控制方法，冷藏冷冻设备的储物间室内设置有密封空间，制氮装置200向密封空间内充入氮气以加强其保鲜效果。该控制方法包括：检测密封空间内部的氮气浓度；判断氮气浓度是否大于预设的第一浓度阈值；若是，控制空压机210持续工作以使得氮氧分离器220持续产生氮气，若否，控制空压机210以开启第一预设时间、关闭第二预设时间的间歇方式工作。在浓度传感器检测出的密封空间氮气浓度高于第一浓度阈值时，说明密封空间内的氮气接近饱和，制氮装置200能够在短时间内将氮气浓度提升至目标浓度阈值，在这种情况下，空压机210可以持续工作直至将氮气浓度提升至目标浓度阈值后在停机，空压机210由于持续工作时间短，温度不会上升过高。在浓度传感器检测出的密封空间氮气浓度低于第一浓度阈值时，说明制氮装置200需要较长时间才能将氮气浓度提升至第二浓度阈值，在这种情况下，空压机210如果持续工作将导致其温度上升过高，空压机210按照开启第一预设时间后关闭第二预设时间的间歇方式工作，利用第二预设时间自然冷却降温，以减缓空压机210的温度上升速度，防止高温对空压机210造成损害，保证了制氮装置200正常工作，同时防止制氮装置200产生氮气温度过高，造成密封空间温度上升，影响食物保鲜，从而提高了制氮装置200的工作可靠性。
另外，本实施例的方法在氮气浓度达到第二浓度阈值后关闭空压机210。通过检测氮气浓度制定制氮时间，能够准确控制冷藏冷冻设备的制氮装置200的工作时长。从而防止制氮时间过长，浪费能源，或者防止制氮时间过短，不能达到满足食物保鲜的氮气浓度的要求。
进一步地，本实施例的控制方法在检测密封空间内部氮气的浓度的步骤之前还包括：检测冷藏冷冻设备的制冷压缩机500是否开启；若是，保持空压机210关闭，并在制冷压缩机500关闭后执行检测密封空间内部氮气的浓度的步骤。本实施例的冷藏冷冻设备控制制冷压缩机500和空压机210在不同时间运行。在制冷检测装置600检测到制冷压缩机500开启时，保持空压机210的关闭状态，减小了冷藏冷冻设备的工作噪音。
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。

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  1. 一种冷藏冷冻设备的控制方法，所述冷藏冷冻设备的储物间室内部设置有密封空间，并且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，并且所述制氮装置包括空压机以及氮氧分离器，其中所述空压机受控地向所述氮氧分离器提供压缩空气，以使所述氮氧分离器使用所述压缩空气制备氮气，并且所述控制方法包括：
    检测所述密封空间内部的氮气浓度；
    判断所述氮气浓度是否大于预设的第一浓度阈值；
    若是，控制所述空压机持续工作以使得所述氮氧分离器持续产生氮气，直至所述氮气浓度达到预设的第二浓度阈值，所述第二浓度阈值大于所述第一浓度阈值；以及
    若否，控制所述空压机开启第一预设时间，使得所述氮氧分离器在该预设时间内制备氮气，并在所述空压机开启所述第一预设时间后关闭，并间隔第二预设时间后重新执行检测所述密封空间内部氮气的浓度的步骤。
  2. 根据权利要求1所述的方法，其中，在控制所述空压机持续工作的过程中还包括：
    检测所述空压机的工作温度；
    在所述空压机的工作温度大于第一预设温度的情况下，控制所述空压机在启动第三预设时间后关闭，并在关闭第四预设时间后重新检测所述密封空间内部氮气的浓度；以及
    若否，执行检测所述密封空间内部氮气的浓度的步骤。
  3. 根据权利要求1所述的方法，其中，在检测所述密封空间内部氮气的浓度的步骤之前还包括：
    检测所述冷藏冷冻设备的制冷压缩机是否开启；
    若是，保持所述空压机关闭，并在所述制冷压缩机关闭后执行检测所述密封空间内部氮气的浓度的步骤。
  4. 根据权利要求1所述的方法，其中，
    在所述氮气浓度达到所述第二浓度阈值后关闭所述空压机，在所述空压 机关闭达到第五预设时间后重新执行检测所述密封空间内部的氮气浓度的步骤。
  5. 根据权利要求1所述的方法，其中，在开启所述空压机进行制氮的过程还包括：
    检测所述储物间室的储物温度；
    判断所述储物温度是否大于第二预设温度；
    若是，关闭所述空压机，然后开启所述制冷压缩机。
  6. 一种冷藏冷冻设备，包括：
    密封盒，设置于所述冷藏冷冻设备的储物间室内部，所述密封盒限定出密封空间；
    氮气浓度传感器，设置于所述密封空间内，配置成检测所述密封空间内的氮气浓度；
    制氮装置，配置成向所述密封空间提供氮气，其包括空压机和氮氧分离器，所述空压机受控地向所述氮氧分离器提供压缩空气，以使所述氮氧分离器使用所述压缩空气制备氮气；
    所述空压机还配置成，在所述氮气浓度大于预设的第一浓度阈值的情况下，持续工作以使得所述氮氧分离器持续产生氮气，直至所述氮气浓度达到预设的第二浓度阈值；在所述氮气浓度小于所述第一浓度阈值的情况下，按照开启第一预设时间后关闭第二预设时间的间歇方式工作，所述第二浓度阈值大于所述第一浓度阈值；并且
    所述氮气浓度传感器还配置成，在所述空压机每次关闭所述第二预设时间后重新检测所述密封空间内部氮气的浓度。
  7. 根据权利要求6所述的冷藏冷冻设备，还包括：
    空压机温度传感器，配置成检测所述空压机的工作温度；并且
    所述空压机还配置成，在所述空压机持续工作的过程中，所述工作温度大于第一预设温度的情况下，按照开启第三预设时间后关闭第四预设时间的间歇方式工作；以及
    所述氮气浓度传感器还配置成，在所述空压机每次关闭所述第四预设时间后重新检测所述密封空间内部氮气的浓度。
  8. 根据权利要求6所述的冷藏冷冻设备，还包括：
    制冷检测装置，配置成检测所述冷藏冷冻设备的制冷压缩机是否开启；并且
    所述空压机还配置成，在所述制冷压缩机开启的情况下，保持所述空压机关闭；
    所述氮气浓度传感器还配置成，在所述制冷压缩机关闭后重新检测所述密封空间内部氮气的浓度。
  9. 根据权利要求6所述的冷藏冷冻设备，其中，
    所述空压机还配置成，在所述氮气浓度达到第二浓度阈值后关闭；并且
    所述氮气浓度传感器还配置成，在所述空压机关闭到达第五预设时间后重新检测所述密封空间内部氮气的浓度。
  10. 根据权利要求6所述的冷藏冷冻设备，还包括：
    间室温度传感器，配置成检测所述储物间室的储物温度；并且
    所述空压机还配置成，在所述储物温度大于第二预设温度的情况下关闭；
    所述制冷压缩机还配置成，在所述储物温度大于所述第二预设温度的情况下，等待所述空压机关闭后开启。
PCT/CN2017/074608 2016-05-26 2017-02-23 冷藏冷冻设备及其控制方法 Ceased WO2017202089A1 (zh)

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