WO2018103727A1

WO2018103727A1 - Refrigerating and freezing device and control method therefor

Info

Publication number: WO2018103727A1
Application number: PCT/CN2017/115145
Authority: WO
Inventors: 娄喜才; 王铭; 朱小兵; 王磊
Original assignee: 青岛海尔股份有限公司
Priority date: 2016-12-09
Filing date: 2017-12-08
Publication date: 2018-06-14
Also published as: CN106679320A; CN106679320B

Abstract

A refrigerating and freezing device and a control method therefor. The method comprises: starting an air extracting pump (40), enabling the air extracting pump (40) to run for a first preset time and then stopping the air extracting pump (40), so that the concentration of nitrogen in an air-regulating fresh-keeping space reaches a preset concentration threshold; detecting whether the air-regulating fresh-keeping space is opened and then closed; and if yes, after the stop duration of the air-regulating fresh-keeping space exceeds a second preset time, controlling the air extracting pump (40) to be started, and enabling the air extracting pump (40) to continually run for the first preset time and then stopping the air extracting pump (40).

Description

Refrigeration and freezing device and control method thereof

The present application claims the priority of the Japanese Patent Application Serial No. No. No. No. No. No. No.

Technical field

The invention relates to the field of refrigeration, and in particular to a refrigerating and freezing device and a control method thereof.

Background technique

The modified atmosphere preservation technology generally refers to a technique for prolonging the storage life of a food by adjusting the gas atmosphere (gas composition ratio or gas pressure) of the enclosed space in which the storage is located, and the basic principle is: in a certain closed space. A gas atmosphere different from the normal air component is obtained by various adjustment methods to suppress physiological and biochemical processes and microbial activities leading to spoilage of the stored matter (usually the foodstuff). In particular, in the present application, the modified atmosphere preservation will be specifically directed to a modified atmosphere preservation technique that adjusts the proportion of gas components.

It is known to those skilled in the art that normal air components include (by volume percent, hereinafter the same): about 78% nitrogen, about 21% oxygen, about 0.939% rare gas 0.031% carbon dioxide, and 0.03% other gases. And impurities (for example, ozone, nitrogen monoxide, nitrogen dioxide, water vapor, etc.. In the field of modified atmosphere preservation, it is common to use a nitrogen-filled space to reduce the oxygen content in a closed space to obtain a nitrogen-rich and oxygen-poor fresh gas. Atmosphere. Here, those skilled in the art are aware that a nitrogen-enriched gas refers to a gas having a nitrogen content exceeding the nitrogen content of the above-mentioned normal air, for example, the nitrogen content thereof may be 95% to 99% or even higher; and the nitrogen-rich oxygen is rich. The fresh gas atmosphere refers to a gas atmosphere in which the nitrogen content exceeds the above-mentioned normal air nitrogen content and the oxygen content is lower than the oxygen content in the above-mentioned normal air.

The history of modified atmosphere preservation technology dates back to 1821 when German biologists discovered that fruits and vegetables could reduce metabolism at low oxygen levels. But until now, due to the large size and high cost of nitrogen-making equipment traditionally used for gas-conditioning preservation, the technology is basically limited to use in various large-scale professional storage (the storage capacity is generally at least 30 tons). . It can be said that the appropriate gas regulation technology and corresponding equipment can economically reduce and quiet the air-conditioning system, making it suitable for home or individual users. It is a constant desire of technicians in the field of atmosphere preservation and preservation. A technical problem that can be successfully solved.

Summary of the invention

In view of the above problems, 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 maintain the concentration of nitrogen in the atmosphere of the atmosphere.

Another further object of the invention is to save energy.

According to an aspect of the present invention, the present invention provides a method for controlling a refrigerating and freezing apparatus. The storage space of the refrigerating and freezing apparatus is provided with an air conditioning space, and the refrigerating and freezing apparatus is provided with a nitrogen concentration for improving the atmosphere in the fresh air conditioning space. The air pump and the air conditioning membrane module are configured to extract the gas in the air conditioning space outward, so that the air in the air conditioning space flows to the air conditioning membrane module, and the air conditioning is performed under the action of the air conditioning membrane module. Part or all of the oxygen-enriched gas in the air in the fresh space is discharged into the air-conditioning space through the pipeline and the air pump, and the maximum working power of the air pump is greater than the preset power, and the control method includes: turning on the air pump and continuously running the first preset After the time is closed, so that the nitrogen concentration inside the atmosphere fresh-keeping space reaches the preset concentration threshold; whether the air-conditioning space is opened and then closed; if yes, after waiting for the air-conditioning space to be closed for a second preset time, control The air pump is turned on and is turned off after the first preset time.

Optionally, after the step of closing the air pump, the method further comprises: determining whether the air pump has been turned off for more than a third preset time; if yes, controlling the air pump to be turned on and continuously running for a first preset time.

Optionally, after the step of determining that the air pump has been turned off for more than the third preset time, further comprising: determining whether the door body of the refrigerating and freezing device is detected to be turned on during the closing time of the air pump; if not, the air pump is After the closing time is extended to the fourth preset time, the step of turning on the air pump is performed.

Optionally, the method further includes: acquiring a time period in which the number of door opening times of the refrigerating and freezing device exceeds a preset threshold; acquiring an operation time of the refrigerating and freezing device; determining whether the operation time is within a time period; and if the determination result is yes, Keep the pump off until the end of the time period.

Optionally, the method further comprises: detecting whether the compressor of the refrigerating and freezing device is turned on; if so, keeping the air pump off until the compressor is turned off.

According to another aspect of the present invention, the present invention further provides a refrigerating and freezing device, comprising: a box body, a storage space is defined in the box body, and a gas storage space is arranged inside the storage space; a gas regulating membrane module, a gas atmosphere The membrane module has a gas regulating membrane and an oxygen-rich gas collecting chamber, and one side of the gas regulating membrane faces the oxygen-rich gas collecting chamber to make the gas when the pressure of the oxygen-rich gas collecting chamber is lower than the pressure of the other side of the gas regulating membrane The oxygen-enriched gas in the air on the other side of the membrane passes through the gas regulating membrane into the oxygen-rich gas collecting chamber; the inlet end of the pump is connected to the oxygen-rich gas collecting chamber of the gas regulating membrane module via a pipeline, and the pump is The maximum working power is greater than the preset power, and the air pump is configured to draw out the gas in the air conditioning space to make the gas Adjusting the air in the fresh space to the air-conditioning membrane module, and under the action of the air-conditioning membrane module, some or all of the oxygen-rich gas in the air in the air-conditioning space enters the oxygen-rich gas collecting chamber, and then passes through the pipeline and the air pump. Exhaust the atmosphere and keep fresh space, so as to obtain nitrogen-rich and oxygen-poor in the atmosphere of fresh air to promote food preservation; the main control panel is configured to control the pump to be continuously operated for the first preset time and then closed, so that the atmosphere is kept fresh The nitrogen concentration in the space reaches the preset concentration threshold; the air-conditioning fresh-keeping space opening and closing detecting device is disposed at the opening of the air-conditioning space, and is configured to detect whether the air-conditioning space is opened and then closed; wherein the main control board is also configured After the waiting for the fresh air conditioning space is closed for a second preset time, the air pump is turned on and turned off after the first preset time is continuously operated.

Optionally, the main control board is further configured to: determine whether the air pump has been turned off for more than a third preset time; if yes, control the air pump to be turned on and continue to run for a first preset time.

Optionally, the refrigerating and freezing device further includes: a door opening and closing detecting device disposed on the box body or the door body, configured to detect whether the door body of the refrigerating and freezing device is opened; wherein the main control board is further configured to determine Whether the door of the refrigerating and freezing device is detected to be opened during the closing time of the air pump, and if not, the closing time of the air pump is extended to the fourth predetermined time, and then the step of turning on the air pump is performed.

Optionally, the main control board is further configured to: obtain a time period in which the number of door opening times of the refrigerating and freezing device exceeds a preset threshold, obtain an operation time of the refrigerating and freezing device, determine whether the running time is within a time period, and if the judgment result is Yes, keep the pump off until the end of the time period.

Optionally, the refrigerating and freezing device further comprises: a compressor configured to be refrigerated and refrigerated; wherein the main control panel is further configured to detect whether the compressor of the refrigerating and freezing device is turned on, and if so, keep the air pump closed until the compressor is turned off.

The invention provides a control method for a refrigerating and freezing device, which comprises: turning on an air pump and continuously closing after a first preset time, so that the nitrogen concentration inside the air conditioning space reaches a preset concentration threshold; detecting the air conditioning Whether the fresh space is opened and then closed; if yes, after waiting for the fresh air storage space to be closed for a second preset time, the control air pump is turned on, and is turned off after the first preset time is continuously operated. During the subsequent use of the refrigerating and freezing device, if the air-conditioning space opening and closing detecting device detects that the air-conditioning space is opened and closed, it proves that the user has used the atmosphere to keep fresh air, which will cause nitrogen leakage inside the atmosphere. The nitrogen concentration is lowered. Therefore, the air pump needs to be re-extracted, so that the nitrogen concentration in the modified atmosphere is maintained within a concentration range favorable for food preservation, and the food is continuously provided with a nitrogen-rich and oxygen-poor fresh gas atmosphere.

In addition, after detecting that the air-conditioning space is closed, the main control board does not control the air pump to start working directly, but delays the second preset time and then turns on the air pump to prevent the user from using the sealed room again in a short time. The newly created nitrogen-rich environment was once again destroyed. If the user uses the sealed room again in a short time, then the pump must be restarted. This increases the working time of the pump, affects its life, and also wastes energy. The design of the delayed open air pump of the present invention effectively eliminates the above problems, improves the service life of the air pump, and saves energy.

Further, after the step of determining that the air pump has been turned off for more than the third preset time, the method of the present invention further comprises: determining whether the door of the refrigerating and freezing device is detected to be turned on during the closing time of the air pump; After the closing time of the air pump is extended to the fourth preset time, the step of turning on the air pump is performed. Since the atmosphere of the atmosphere can not be 100% sealed, even if the user does not use the atmosphere, the internal nitrogen will gradually leak over time. After the air pump is turned off for more than the third preset time, the nitrogen concentration in the air-conditioning space will be significantly reduced. At this time, the main control board turns on the air pump again, and the gas adjustment module is used to raise the nitrogen concentration in the air-conditioning space again. In order to ensure that the concentration of nitrogen in the air-conditioning space is maintained within a concentration range that is conducive to food preservation.

Still further, the method of the present invention can also detect if the compressor of the refrigerated freezer is turned on, and if so, keep the pump off until the compressor is turned off. If the compressor and the air pump of the refrigerating and freezing device are simultaneously activated, the noise generated by the two will be superimposed and enlarged, which affects the normal life of the user. Therefore, in the present embodiment, the main control board prohibits the compressor and the air pump from being simultaneously activated. Specifically, if the compressor is running at a certain time, and the condition that the air pump is turned on is reached at this time, the main control board can delay the opening of the air pump until the air pump is turned on after the compressor stops. Or at some point, the pump is working, and at this time the compressor is turned on, the main control board can immediately close the pump, waiting for the compressor to stop before completing the subsequent pumping work. The method of the present invention reduces the noise generated by the refrigerating and freezing device and improves the user experience.

The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <

DRAWINGS

Some specific embodiments of the present invention are described in detail below by way of example, and not limitation. The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the figure:

1 is a schematic view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

2 is a schematic view of a drawer 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 according to an embodiment of the present invention;

Figure 4 is a schematic block diagram of a refrigerating and freezing apparatus according to another embodiment of the present invention;

Figure 5 is a schematic illustration of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention;

Figure 6 is a flow chart showing a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention;

7 is a flow chart showing a control method of a refrigerating and freezing apparatus according to another embodiment of the present invention;

Figure 8 is a flow chart showing a control method of a refrigerating and freezing apparatus according to another embodiment of the present invention.

detailed description

The present embodiment first provides a refrigerating and freezing apparatus, FIG. 1 is a schematic view of a refrigerating and freezing apparatus according to an embodiment of the present invention; and FIG. 2 is a schematic view of a drawer 20 of the refrigerating and freezing apparatus according to an embodiment of the present invention; A schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention; and Fig. 4 is a schematic block diagram of a refrigerating and freezing apparatus according to another embodiment of the present invention. The refrigerating and freezing apparatus includes a casing 10, a gas regulating membrane module 30, an air pump 40, a main control panel 50, and an air-conditioning space opening and closing detecting device 60. The above refrigerating and freezing device may be a refrigerator, a freezer or the like.

A storage space, a compressor compartment 24, and an atmosphere preservation space disposed in the storage space are defined in the casing 10. Specifically, the case 10 may include a liner and an inner tube. A storage space is defined within the bladder. The inner cylinder can be disposed at a lower portion of the inner tank, and an air-conditioning space is defined therein. Of course, as will be appreciated by those skilled in the art, the inner barrel can also be disposed in the middle or upper portion of the bladder. In this embodiment, the inner and inner cylinders may be integrally formed or may be separately formed and then installed.

The main door body is rotatably mounted on one side of the casing 10 and configured to open or close the storage space defined by the casing 10. Further, in order to make the modified atmosphere fresh as much as possible, in some embodiments, the refrigerating and freezing device may further comprise a small door body configured to open or close the modified atmosphere. In some preferred embodiments, the refrigerated freezer may further include a drawer 20 that may have a drawer end cap 23 and is slidably mounted to the modified atmosphere. The drawer end cover 23 can cooperate with the opening of the air-conditioning space for closing the air-conditioning space. At this time, the modified atmosphere can also be referred to as a drawer 20 space, and the inner cylinder can also be referred to as a drawer 20 cylinder. Specifically, the drawer 20 is slidably mounted to the inner barrel to operatively withdraw outwardly and inwardly into the inner barrel from the forward opening of the inner barrel. In some alternative embodiments of the invention, the main door body is pivotally mounted to the cabinet 10 to open or close the remaining space outside the modified atmosphere of the storage space.

The air-conditioning space opening and closing detecting device 60 is disposed at an opening of the air-conditioning space, and is configured to detect whether the air-conditioning space is opened and then closed. In this embodiment, the modified atmosphere can be a drawer 20, and the drawer 20 can have a drawer end cover 23. The air-conditioning space opening and closing detecting device 60 can be a sensor disposed on the drawer end cover 23. The sensor is preferably a pressure sensor. When the drawer end cover 23 closes the opening of the drawer 20, the drawer end cover 23 abuts the drawer 20, the pressure sensor is subjected to pressure, and the drawer 20 closing signal is transmitted to the main control panel 50; when the drawer end cover 23 is opened When the drawer 20 is opened, the pressure sensor is not subjected to pressure, and the drawer 20 opening signal is transmitted to the main control panel 50.

The refrigeration system may be a refrigeration cycle system composed of a compressor 21, a condenser, a throttle device, an evaporator, and the like. The compressor 21 is mounted in the compressor housing 24. The evaporator is configured to provide cooling directly or indirectly into the storage space. E.g, When the refrigerating and freezing device is a domestic compression type direct cooling refrigerator, the evaporator may be disposed outside or inside the rear wall surface of the inner casing. When the refrigerating and freezing device is a domestic compression air-cooled refrigerator, the casing 10 further has an evaporator chamber, and the evaporator chamber is connected to the storage space through the air passage system, and the outlet of the evaporator is disposed at the outlet of the evaporator. The fan is used to circulate and cool the storage compartment.

The gas regulating membrane module 30 has a gas regulating membrane and an oxygen-rich gas collecting chamber, and one side of the gas regulating membrane faces the oxygen-rich gas collecting chamber so that when the pressure of the oxygen-rich gas collecting chamber is lower than the pressure of the other side of the gas regulating membrane The oxygen-enriched gas in the air on the other side of the gas regulating membrane is passed through the gas regulating membrane into the oxygen-rich gas collecting chamber. Specifically, when the air conditioning membrane module 30 is disposed, the other side of the air-conditioning membrane can be directly in contact with the modified atmosphere, or with a circulating flow channel (or a circulating space) that communicates with the modified atmosphere. When the pressure of the oxygen-rich gas collecting chamber is less than the pressure of the air-conditioning space, the oxygen-rich gas in the air in the fresh air space is passed through the gas regulating membrane into the oxygen-rich gas collecting chamber.

The air pump 40 is also disposed in the compressor chamber 24, and the inlet end of the air pump 40 communicates with the oxygen-rich gas collecting chamber of the gas regulating membrane module 30 via a pipeline, and is configured to be evacuated outward to make the oxygen-rich gas collecting chamber The pressure is less than the pressure of the atmosphere. That is, the air pump 40 is configured to extract the gas in the atmosphere fresh-keeping space outward, so that the air in the air-conditioning space flows to the air-conditioning membrane module 30, and the air-conditioning is performed under the action of the air-conditioning membrane module 30. Part or all of the oxygen-rich gas in the air in the fresh space enters the oxygen-rich gas collection chamber, and then exits the air-conditioning space through the pipeline and the air pump 40, thereby obtaining nitrogen-rich and oxygen-poor in the air-conditioning space for food preservation. Gas atmosphere. The above oxygen-rich gas is mostly oxygen. In this embodiment, the gas regulating membrane can selectively pass through the oxygen-rich gas in the air-conditioning space, and the remaining nitrogen in the air is retained inside the air-conditioning space, thereby improving the nitrogen inside the atmosphere. concentration.

The maximum working power of the air pump 40 is greater than a preset power, and the preset power is a power range that the chilling and freezing device needs to reach the gas atmosphere for food preservation. In other words, the air pump 40 is high power pumping. The maximum operating power of the air pump 40, the pumping pump 40 is much greater than the operating power actually required inside the refrigerating and freezing unit. Therefore, the air pump 40 can maintain a low load operation in actual operation, and the temperature rises slowly, so that it can be operated for a long time.

The refrigerating and freezing device of the invention can form a gas atmosphere rich in nitrogen and oxygen in the air-conditioning space of the storage space to facilitate food preservation, and the gas atmosphere reduces the oxygen content of the fruit and vegetable by reducing the oxygen content in the storage space of the fruit and vegetable. At the same time, it ensures the basic respiration and prevents anaerobic respiration of fruits and vegetables, so as to achieve the purpose of long-term preservation of fruits and vegetables. Moreover, the gas atmosphere also has a large amount of gas such as nitrogen gas, and does not reduce the cooling efficiency of articles in the atmosphere of the modified atmosphere, so that fruits and vegetables can be effectively stored. The air pump 40 is disposed in the compressor chamber 24, and can fully utilize the space of the compressor chamber 24, and does not occupy other places, so the extra volume of the refrigerating and freezing device is not increased, and the refrigerating and freezing device can be Compact structure.

The main control board 50 is configured to control the air pump 40 to be turned off after the first predetermined time of continuous operation, so that the nitrogen concentration inside the air conditioning space reaches a preset concentration threshold. When the refrigerating and freezing device of the embodiment is used for the first time after being energized, the main control board 50 first controls the air pump 40 to continue to operate for a first preset time, so that the nitrogen concentration inside the atmosphere fresh-keeping space reaches a preset concentration threshold. The preset concentration threshold may be 88% to 97%, preferably 93%. According to repeated experiments by the inventors, when the nitrogen concentration is within the range, the preservation effect is optimal. The first preset time may be set according to the size of the air conditioning space and the actual operating power of the air pump 40, which may be 20 minutes in this embodiment.

The main control board 50 also turns on the air pump 40 after waiting for the air conditioning space to be closed for a second preset time, and turns it off after continuing to operate for the first preset time. During the subsequent use of the refrigerating and freezing device, if the air-conditioning space opening and closing detecting device 60 detects that the air-conditioning space is opened and closed, it proves that the user uses the atmosphere fresh-keeping space, which will cause the nitrogen leakage inside the atmosphere fresh-keeping space. The nitrogen concentration is lowered, so the pumping pump 40 is required to re-pump. After detecting that the modified atmosphere is closed, the main control panel 50 does not control the air pump 40 to start working directly, but delays the second predetermined time and then turns on the air pump 40 to prevent the user from using the sealed room again in a short time. The newly created nitrogen-rich environment was once again destroyed. If the user re-uses the sealed chamber in a short time, the air pump 40 is again turned on, which increases the working time of the air pump 40, affects its life, and also wastes energy. The second preset time may be set according to the usage habits of the user and the working time of the air pump 40 each time, for example, may be 0.5 hours.

The main control board 50 is further configured to determine whether the air pump 40 has been turned off for more than a third predetermined time, and if so, control the air pump 40 to be turned on and continue to operate for a first predetermined time. Those skilled in the art can understand that the modified atmosphere is theoretically a sealed compartment, but in fact, the atmosphere can not be 100% sealed, so even if the user does not use the atmosphere, as time goes by, The internal nitrogen will also gradually leak. In this embodiment, after the air pump 40 is turned off for more than the third predetermined time, the nitrogen concentration in the air-conditioning space will be significantly decreased. At this time, the main control board 50 turns on the air pump 40 again, and uses the air conditioning module 30 again. Increase the nitrogen concentration in the atmosphere. The third preset time may be set according to the rate of natural nitrogen leakage in the atmosphere fresh-keeping space, for example, may be 5.5h, that is, the pump 10 is turned off again after reaching 5.5h each time to ensure the air-conditioning preservation. The concentration of nitrogen in the space is maintained within a concentration range that is conducive to food preservation.

The above-described refrigerating and freezing apparatus further includes a door opening and closing detecting device 70. The door opening and closing detecting device 70 is configured to detect whether or not the door body of the refrigerating and freezing device is opened. In this embodiment, the door opening and closing detecting device 70 may be a pressure sensor or an infrared sensor, and is disposed on the contact surface of the refrigerating and freezing device housing 10 and the door body. When the door body is opened, the door body and the housing 10 are Separating, the door opening and closing detecting means 70 issues a door opening signal to the main control board 50. The main control board 50 is further configured to determine whether the door of the refrigerating and freezing device is detected to be opened during the closing time of the air pump 40, and if not, the air pump is to be pumped After the closing time of 40 is extended to the fourth preset time, the step of turning on the air pump 40 is performed. According to the foregoing, the atmosphere fresh-keeping space cannot be 100% sealed, so there is a certain gas exchange between the modified atmosphere and the storage space. Therefore, in the process of using the refrigerator and opening the door body, a small portion of the nitrogen in the atmosphere of the modified atmosphere is leaked to the outside of the refrigerating and freezing device, resulting in a decrease in the nitrogen concentration. On the contrary, if the main control board 50 has not received the door opening signal of the door opening and closing detecting device 70 from the time when the air pump 40 is turned off until the time when the closing reaches the third preset time, the user is not in the time period. With the refrigerator, the nitrogen loss inside the atmosphere fresh-keeping space is small, and the opening time of the air pump 40 can be delayed at this time to reduce the working time of the air pump 40. In the present embodiment, the pumping time of the air pump 40 can be extended after the closing time of the air pump 40 is extended to the fourth predetermined time. The fourth preset time may be cut off after the user opens the door body, and the fourth preset time preferably does not exceed 10 hours.

The main control board 50 is further configured to acquire a time period in which the number of door opening times of the refrigerating and freezing device exceeds a preset threshold, which is a time period during which the user frequently uses the refrigerator. In this embodiment, the main control board 50 can count the number of times the user opens the door. The main control board 50 may preset a timing period, divide the timing period into a plurality of statistical time segments, and then set a corresponding counter for each statistical time period, and count in the corresponding counter according to the time when the switching gate event occurs. . The above timing period can be one day or one week. For example, in this embodiment, the time period is one day, and 72 statistical time periods can be set in units of 20 minutes per day, respectively: 00:00 to 00:20, 00:20 to 00:40, ..., 23 : 20 to 23:40, 23:40 to 00:00. Set the corresponding counter for each statistical time period, that is, set a total of 72 counters. According to the time when the switch gate event occurs, the counter is counted in the corresponding counter. For example, when the switch gate event occurs at 08:10, the counter count corresponding to the time range from 08:00 to 08:20 is incremented by one. After a certain number of chronograph period statistics, the main control board 50 records the time period in which the number of opening of the refrigerator door exceeds a preset threshold. For example, the preset threshold is 5, and the count number of counters is 7 in the period from 08:00 to 08:20, and 08:00 to 08:20 is the time period that meets the above requirements. The preset threshold may be determined according to the timing period and the size of the statistical time period. In this embodiment, the preset threshold may be 10, that is, about every 2 minutes, the user opens the door 300 once. In other embodiments, the time period described above may be actively set by the user. The operation panel is provided on the door body of the refrigerator in the embodiment, and the user can input the time period information set by the user through the operation panel to save the statistical operation of the refrigerator.

The main control board 50 also acquires the operation timing of the refrigerating and freezing apparatus, judges whether or not the current operation time is within the time period, and if the determination result is YES, maintains the closed state of the air pump 40 until the end of the time period. The main control board 50 prohibits the air pump 40 from operating during the period in which the user frequently uses the refrigerator to prevent the user from using the sealed room again in a short time after the air pump 40 is completed, causing the newly generated nitrogen-rich environment to be destroyed again. Specifically, if the air pump 40 is working and the time period is just reached, the main control board 50 can immediately turn off the air pump 40, or within the above time period. At some point, just after the requirement to turn on the air pump 40 is reached, the main control board 50 can delay the opening of the air pump 40 until the end of the above period of time, and then turn on the air pump 40 for the first preset time.

The main control board 50 is also configured to detect whether the compressor 21 of the refrigerating and freezing apparatus is turned on, and if so, keep the air pump 40 closed until the compressor 21 is turned off. If the compressor 21 and the air pump 40 of the refrigerating and freezing apparatus are simultaneously activated, the noise generated by the two will be superimposed and enlarged, which affects the normal life of the user. Therefore, in the present embodiment, the main control board 50 prohibits the compressor 21 and the air pump 40 simultaneously. start up. Specifically, if the compressor 21 is running at a certain time, and the condition that the air pump 40 is turned on is reached at this time, the main control board 50 can delay the opening of the air pump 40 until the compressor 21 is turned off and the air pump is turned on. 40. At some point or some time, the air pump 40 is working, and at this time, the compressor 21 is turned on, and the main control board 50 can immediately turn off the air pump 40, and wait for the compressor 21 to stop before completing the subsequent pumping work.

This embodiment also provides a control method of the refrigerating and freezing apparatus. Fig. 5 is a schematic view showing a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention. The control method includes:

Step S502, the air pump 40 is turned on and continuously turned off after the first preset time, so that the nitrogen concentration inside the air conditioning space reaches a preset concentration threshold. When the refrigerating and freezing device of the embodiment is used for the first time after being energized, the main control board 50 first controls the air pump 40 to continue to operate for a first preset time, so that the nitrogen concentration inside the atmosphere fresh-keeping space reaches a preset concentration threshold. The preset concentration threshold may be 88% to 97%, preferably 93%. According to repeated experiments by the inventors, when the nitrogen concentration is within the range, the preservation effect is optimal. The first preset time may be set according to the size of the air conditioning space and the actual operating power of the air pump 40, which may be 20 minutes in this embodiment.

In step S504, it is judged that the modified atmosphere is opened and then closed. During the subsequent use of the refrigerating and freezing device, if the air conditioning space is detected to be turned on and off, it proves that the user has used the atmosphere to keep fresh air, which will cause nitrogen leakage inside the atmosphere, and the nitrogen concentration is reduced, so the pump needs to be pumped. 40 pumping again.

Step S506, after waiting for the air conditioning fresh space to be closed for a second preset time, the air pump 40 is controlled to be turned on, and is turned off after the first preset time is continuously operated. After detecting that the air conditioning space is closed, the air pump 40 is not directly controlled to start working, but the air pump 40 is turned on after a second preset time to prevent the user from using the sealed room again in a short time, resulting in new The resulting nitrogen-rich environment was once again destroyed. If the user re-uses the sealed chamber in a short time, the air pump 40 is again turned on, which increases the working time of the air pump 40, affects its life, and also wastes energy. The second preset time may be set according to the usage habits of the user and the working time of the air pump 40 each time, for example, may be 0.5 hours.

Figure 6 is a flow chart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention. The control method performs the following steps in sequence:

Step S602, the air pump 40 is turned on and continuously turned off after the first preset time, so that the atmosphere is kept in the fresh space. The nitrogen concentration reaches the preset concentration threshold.

In step S604, it is determined that the air pump 40 has been turned off for more than the third preset time. The refrigerator main control board 50 also has a timing function, and when the main control board 50 receives the closing signal of the air pump 40, the timing of the closing of the air pump 40 can be determined.

In step S606, if the result of the determination in step S604 is no, it is determined whether the modified atmosphere storage compartment is opened and closed.

Step S608, if the result of the determination in step S606 is YES, wait for the air-conditioning space to be closed to reach the second preset time. If the decision result in the step S606 is NO, the flow returns to the step S604.

In step S610, the air pump 40 is controlled to be turned on, and is turned off after the first preset time is continuously operated.

Step S612, if the result of the determination in step S604 is NO, it is continued to determine whether or not the door body is opened during the closing time of the air pump 40.

In step S614, if the result of the determination in step S612 is no, the closing time of the air pump 40 is extended to the fourth preset time. If the main control board 50 has not received the door opening signal of the door opening and closing detecting device 70 from the time when the air pump 40 is turned off to the time when the closing reaches the third predetermined time, the user does not use the refrigerator during the time period. The nitrogen loss inside the atmosphere fresh-keeping space is small, and the opening time of the air pump 40 can be delayed at this time to reduce the working time of the air pump 40. In the present embodiment, the pumping time of the air pump 40 can be extended after the closing time of the air pump 40 is extended to the fourth predetermined time. The fourth preset time may be cut off after the user opens the door body, and the fourth preset time preferably does not exceed 10 hours. If the result of the determination in step S612 is YES, it indicates that the user has used the refrigerator. During the process of opening the door body, a small portion of the nitrogen in the air-conditioning space is leaked to the outside of the refrigerating and freezing device, resulting in a decrease in nitrogen concentration. Step S610 is performed to increase the concentration of nitrogen in the modified atmosphere.

Figure 7 is a flow chart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention. The control method performs the following steps in sequence:

Step S702: Acquire a time period in which the number of door opening times of the refrigerating and freezing device exceeds a preset threshold. The above period of time is a period of time in which the refrigerating and freezing apparatus is frequently used according to the user's usage habits. The main control board 50 may preset a timing period, divide the timing period into a plurality of statistical time segments, and then set a corresponding counter for each statistical time period, and count in the corresponding counter according to the time when the switching gate event occurs. . The above timing period can be one day or one week. For example, in this embodiment, the time period is one day, and 72 statistical time periods can be set in units of 20 minutes per day, respectively: 00:00 to 00:20, 00:20 to 00:40, ..., 23 : 20 to 23:40, 23:40 to 00:00. Set the corresponding counter for each statistical time period, that is, set a total of 72 counters. According to the time when the switch gate event occurs, the counter is counted in the corresponding counter. For example, when the switch gate event occurs at 08:10, the counter count corresponding to the time range from 08:00 to 08:20 is incremented by one. After a certain number of chronograph cycles, The main control board 50 records the time period in which the number of opening of the refrigerator door exceeds a preset threshold. For example, the preset threshold is 5, and the count number of counters is 7 in the period from 08:00 to 08:20, and 08:00 to 08:20 is the time period that meets the above requirements. The preset threshold may be determined according to the timing period and the size of the statistical time period.

Step S704, acquiring an operation time of the refrigerating and freezing apparatus. A clock is provided inside the refrigerating and freezing apparatus to determine the operation timing of the refrigerating and freezing apparatus.

In step S706, it is determined whether the running time is within the time period.

In step S708, if the result of the determination in step S706 is YES, the closed state of the air pump 40 is maintained until the end of the time period. The main control board 50 prohibits the air pump 40 from operating during the period in which the user frequently uses the refrigerator to prevent the user from using the sealed room again in a short time after the air pump 40 is completed, causing the newly generated nitrogen-rich environment to be destroyed again. Specifically, if the air pump 40 is working, and at this time just after reaching the above time period, the main control board 50 can immediately turn off the air pump 40, or at a certain time in the above time period, just the requirement to turn on the air pump 40 is reached. The main control board 50 can delay the opening of the air pump 40 until the end of the above period of time, and then turn on the air pump 40 for the first preset time.

Figure 8 is a flow chart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention. The control method performs the following steps in sequence:

At step S802, it is judged whether or not the compressor 21 of the refrigerating and freezing apparatus is turned on.

In step S804, if the result of the determination in step S802 is YES, the air pump 40 is kept closed until the compressor 21 is turned off. If the compressor 21 and the air pump 40 of the refrigerating and freezing apparatus are simultaneously activated, the noise generated by the two will be superimposed and enlarged, which affects the normal life of the user. Therefore, in the present embodiment, the main control board 50 prohibits the compressor 21 and the air pump 40 simultaneously. start up. Specifically, if the compressor 21 is running at a certain time, and the condition that the air pump 40 is turned on is reached at this time, the main control board 50 can delay the opening of the air pump 40 until the compressor 21 is turned off and the air pump is turned on. 40. At some point or some time, the air pump 40 is working, and at this time, the compressor 21 is turned on, and the main control board 50 can immediately turn off the air pump 40, and wait for the compressor 21 to stop before completing the subsequent pumping work.

In this regard, it will be appreciated by those skilled in the <RTIgt;the</RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Therefore, the scope of the invention should be understood and construed as covering all such other modifications or modifications.

Claims

A control method for a refrigerating and freezing device, wherein an air-conditioning space is disposed inside a storage space of the refrigerating and freezing device, and the refrigerating and freezing device is provided with an air pump and a gas regulating film for increasing a nitrogen concentration in the air-conditioning space An air pump configured to draw out gas in the modified atmosphere to cause air in the modified atmosphere to flow to the air conditioning module, and in the air conditioning module Directly discharging some or all of the oxygen-enriched gas in the air in the air-conditioning space through the pipeline and the air pump to discharge the air-conditioning space, and the maximum working power of the air pump is greater than a preset power, The method is characterized in that the control method comprises:

Turning on the air pump and continuing to run for a first preset time, and then closing, so that the nitrogen concentration inside the air conditioning space reaches a preset concentration threshold;

Detecting whether the modified atmosphere is opened and then closed;

If yes, after waiting for the modified atmosphere to be closed for a second preset time, the pump is controlled to be turned on, and is turned off after the first preset time is continuously operated.
The method of claim 1 further comprising, after the step of shutting down the pump;

Determining whether the air pump has been turned off for more than a third preset time;

If so, the pump is controlled to be turned on and continuously operated for the first predetermined time.
The method of claim 2, further comprising: after determining that the air pump has been turned off for more than a third predetermined time:

Determining whether it is detected that the door body of the refrigerating and freezing device is opened during the closing time of the air pump;

If not, the step of turning on the air pump is performed after extending the closing time of the air pump to a fourth preset time.
The method of claim 1 further comprising:

Obtaining a time period in which the number of door opening times of the refrigerating and freezing device exceeds a preset threshold;

Obtaining an operation time of the refrigerating and freezing device;

Determining whether the running time is within the time period;

If the result of the determination is YES, the closed state of the air pump is maintained until the end of the time period.
The method of claim 1 further comprising:

Detecting whether the compressor of the refrigerating and freezing device is turned on;

If so, the pump is kept off until the compressor is turned off.
A refrigerating and freezing device, comprising:

a tank body having a storage space defined therein, wherein the storage space is provided with an atmosphere preservation space;

a gas regulating membrane module having a gas regulating membrane and an oxygen-rich gas collecting chamber, and one side of the gas regulating membrane faces the oxygen-rich gas collecting chamber to be in the oxygen-rich gas collecting chamber When the pressure is less than the pressure of the other side of the gas regulating membrane, the oxygen-rich gas in the air on the other side of the gas regulating membrane is passed through the gas regulating membrane into the oxygen-rich gas collecting chamber;

An air pump, whose inlet end is connected to the oxygen-enriched gas collecting chamber of the gas regulating membrane module via a pipeline, the maximum operating power of the air pump is greater than a preset power, and the air pump is configured to adjust the gas The gas in the fresh-keeping space is drawn outward to allow air in the modified atmosphere to flow to the air-conditioning membrane module, and in the air in the air-conditioning space under the action of the air-conditioning membrane module Part or all of the oxygen-rich gas enters the oxygen-rich gas collection chamber, and then the gas-conditioning space is discharged through the pipeline and the air pump, thereby obtaining nitrogen-rich and oxygen-poor in the modified atmosphere. a gas atmosphere for food preservation;

The main control board is configured to control the air pump to be turned off after the first preset time is continuously operated, so that the nitrogen concentration in the air conditioning fresh space reaches a preset concentration threshold;

An air-conditioning fresh-keeping space opening and closing detecting device is disposed at an opening of the air-conditioning space, and configured to detect whether the air-conditioning space is opened and then closed;

The main control board is further configured to turn on the air pump after waiting for the air conditioning space to be closed for a second preset time, and turn it off after the first preset time is continuously operated.
The refrigerating and freezing apparatus according to claim 6, wherein the main control board is further configured to:

Determining whether the air pump has been turned off for more than a third preset time;

If so, the pump is controlled to be turned on and continuously operated for the first predetermined time.
The refrigerating and freezing apparatus according to claim 7, further comprising:

a door opening and closing detecting device disposed on the box body or the door body, configured to detect the refrigerating and refrigerating device Whether the door body is opened;

The main control board is further configured to determine whether the door of the refrigerating and freezing device is detected to be opened during the closing time of the air pump, and if not, to extend the closing time of the air pump to the fourth pre-stage After the time is set, the step of turning on the air pump is performed.
The refrigerating and freezing apparatus according to claim 6, wherein the main control board is further configured to:

Obtaining a time period in which the number of door opening times of the refrigerating and freezing device exceeds a preset threshold, acquiring an operation time of the refrigerating and freezing device, determining whether the operation time is within the time period, and if the determination result is yes, maintaining The closed state of the air pump is until the end of the time period.
The refrigerating and freezing apparatus according to claim 6, further comprising:

a compressor configured to be cooled by the refrigerating and freezing device;

The main control panel is further configured to detect whether the compressor of the refrigerating and freezing device is turned on, and if so, keep the air pump off until the compressor is turned off.