Refrigerator fresh-keeping device and refrigerator
By setting up specific pipelines and valve structures in the refrigerator's preservation device, combined with the control of a vacuum pump, the problem of low nitrogen utilization rate was solved, achieving efficient nitrogen utilization and negative pressure preservation, thus improving the refrigerator's preservation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-05
AI Technical Summary
In existing nitrogen-based preservation technologies for refrigerators, the nitrogen utilization rate is low, resulting in poor preservation effects.
By setting up a second pipeline, a third pipeline, a three-way connector, a first valve, a second valve, and a vacuum pump, and selectively opening either the first or second valve, the vacuum pump is used to selectively evacuate or fill the nitrogen generation module and the preservation compartment with nitrogen, ensuring that some oxygen is discharged before nitrogen is filled in, achieving a negative pressure state and improving nitrogen utilization.
It improves the utilization rate of nitrogen, achieves dual preservation of negative pressure and nitrogen, and enhances the preservation effect.
Smart Images
Figure CN224201983U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of food preservation technology, and in particular to a refrigerator preservation device and a refrigerator. Background Technology
[0002] In modern society, as consumers' demands for refrigerator preservation functions increase, traditional refrigerator preservation technology, which relies solely on low temperatures, is gradually failing to meet market needs. Refrigerator manufacturers are constantly seeking new preservation technologies to enhance product competitiveness. Nitrogen-generating preservation technology has opened up new avenues for refrigerator preservation, creating a low-oxygen environment inside the refrigerator, further improving preservation effects and thus better maintaining the freshness of food.
[0003] In existing technologies, nitrogen-generating structures are typically used to separate nitrogen and oxygen. To ensure efficient nitrogen generation, a vacuum pump is usually used to extract the oxygen produced by the nitrogen-generating structure after separation. The nitrogen separated by the nitrogen-generating structure is then introduced into the preservation zone, causing the oxygen-rich gas inside the refrigerator to be expelled. This process of introducing nitrogen is a natural displacement process, meaning that nitrogen is simply introduced into the preservation zone, and the oxygen-rich gas is "squeezed out" of the preservation zone. As a result, some nitrogen is also released into the outside during the process of expelling the oxygen-rich gas, leading to low nitrogen utilization and poor preservation effect. Utility Model Content
[0004] Therefore, it is necessary to provide a refrigerator preservation device that can improve nitrogen utilization.
[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:
[0006] A refrigerator preservation device includes a preservation compartment, a nitrogen generating module, a three-way connector, a first pipeline, a second pipeline, a third pipeline, a vacuum pump, a first valve, and a second valve.
[0007] The preservation compartment has an air inlet and an air outlet, the nitrogen generation module has a feed inlet, a nitrogen outlet, a first oxygen venting outlet and a second oxygen venting outlet, and the three-way connector has a first port, a second port and a third port;
[0008] One end of the first pipeline is connected to the nitrogen outlet, and the other end is connected to the air inlet; one end of the second pipeline is connected to the second oxygen outlet, and the other end is connected to the first outlet; one end of the third pipeline is connected to the second outlet, and the other end is connected to the air outlet.
[0009] The vacuum pump is connected to the third port. The first valve is located on the second pipeline and is used to control the opening / closing of the second pipeline. The second valve is located on the third pipeline and is used to control the opening / closing of the third pipeline. Furthermore, either the first valve or the second valve can be opened.
[0010] Understandably, this application incorporates a second pipeline, a third pipeline, a T-junction, a first valve, a second valve, and a vacuum pump, with either the first or second valve selectively open. That is, when the first valve is open, the second valve is closed, or vice versa. Thus, when the first valve is open and the second valve is closed, the vacuum pump can evacuate the nitrogen-generating module, removing oxygen and ensuring its nitrogen-generating efficiency. When the first valve is closed and the second valve is open, the vacuum pump can evacuate the preservation compartment. If this evacuation occurs before nitrogen is introduced into the compartment, it removes some oxygen, ensuring that the nitrogen is almost entirely used to create a high-nitrogen, low-oxygen environment for preservation, thus improving nitrogen utilization. Furthermore, evacuating the compartment after nitrogen is introduced creates a negative pressure environment, achieving dual preservation through negative pressure and nitrogen, resulting in better preservation.
[0011] In one embodiment, the three-way connector, the first valve, and the second valve are integrated into a single unit to form a three-way valve, and the three-way valve is configured as a three-way solenoid valve.
[0012] Understandably, by integrating the three-way connector, the first valve, and the second valve into a single three-way valve, the number of components and connection structures connecting the vacuum pump to the nitrogen generation module and the preservation compartment are reduced. This not only makes the structure of the refrigerator preservation device more compact but also simplifies the installation process, thereby improving the assembly efficiency of the refrigerator preservation device.
[0013] In one embodiment, a buffer tank is provided between the vacuum pump and the third port.
[0014] Understandably, by setting up a buffer tank, the high internal pressure during oxygen discharge from the nitrogen generation module can cause a strong instantaneous impact force. The buffer tank, placed between the vacuum pump and the third port, can play a buffering role, preventing the instantaneous impact force generated by the nitrogen generation module from damaging the vacuum pump and ensuring the safety of the vacuum pump.
[0015] In one embodiment, a third valve is provided at the first oxygen vent, the third valve being used to control the opening / closing of the first oxygen vent.
[0016] In one embodiment, the refrigerator preservation device includes at least one nitrogen generation cycle, and each nitrogen generation cycle includes a cycles, where a is an integer greater than or equal to 1; wherein, within one nitrogen generation cycle, the first valve is opened at least twice;
[0017] One cycle is set before the nitrogen generating module generates nitrogen, so that the vacuum pump can evacuate the preservation compartment before the nitrogen generating module generates nitrogen. The remaining cycles are configured so that the vacuum pump can evacuate the preservation compartment after the nitrogen generating module generates nitrogen, after the nitrogen generating module has filled the preservation compartment with nitrogen and the nitrogen generating module has been turned off.
[0018] Understandably, by using a vacuum pump to evacuate the freshness compartment before and after the nitrogen generation module is turned off, the oxygen concentration in the freshness compartment can be reduced before nitrogen is introduced, and further reduced after nitrogen is introduced. At the same time, a negative pressure environment is created in the freshness compartment to further improve the refrigerator's freshness preservation ability and achieve a good preservation effect.
[0019] In one embodiment, the preservation compartment includes a compartment body, a drawer, and a sealing ring. The compartment body has an opening on one side, and the air inlet and the air outlet are located on the compartment body. The sealing ring surrounds the opening, and the drawer is located inside the compartment body by being pulled out through the opening.
[0020] When the drawer is closed, the drawer abuts against the sealing ring to form a seal.
[0021] Understandably, by designing the drawer as a pull-out unit within the compartment and sealing it with a sealing ring, users can conveniently store food by pulling out the drawer. When the drawer is pushed into the compartment, the sealing ring ensures a good seal between the drawer and the compartment, preventing nitrogen leakage and disruption of the negative pressure environment. This maintains a high-nitrogen, low-oxygen environment inside, thereby improving the preservation effect on the stored items.
[0022] In one embodiment, the side of the drawer facing the air inlet is configured as an open opening.
[0023] In one embodiment, the refrigerator preservation device further includes an air intake module, which is connected to the feed inlet via a fourth pipe.
[0024] In one embodiment, the nitrogen generation module is configured as a molecular sieve tower.
[0025] This application also provides the following technical solutions:
[0026] A refrigerator includes a refrigerator preservation device as described in any of the above embodiments.
[0027] Compared to existing technologies, this new method incorporates a second pipeline, a third pipeline, a T-junction, a first valve, a second valve, and a vacuum pump, with either the first or second valve selectively open. Specifically, the first valve is open while the second valve is closed, or vice versa. When the first valve is open and the second valve is closed, the vacuum pump can evacuate the nitrogen-generating module, removing oxygen and ensuring its efficiency. When the first valve is closed and the second valve is open, the vacuum pump can evacuate the preservation compartment. If this evacuation occurs before nitrogen is introduced, it removes some oxygen, ensuring that the nitrogen is almost entirely used to create a high-nitrogen, low-oxygen environment for preservation, thus improving nitrogen utilization. Furthermore, evacuating the compartment after nitrogen is introduced creates a negative pressure environment, achieving dual preservation through negative pressure and nitrogen, resulting in better preservation. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a structural block diagram of the refrigerator preservation device provided in this application.
[0030] Figure 2 A schematic diagram of the structure of a refrigerator preservation device in one embodiment provided in this application.
[0031] Figure 3 A schematic diagram of the structure of the preservation compartment provided in this application.
[0032] The component labels are as follows:
[0033] 100. Refrigerator preservation device; 10. Preservation compartment; 11. Air inlet; 12. Air outlet; 13. Body; 131. Opening; 14. Drawer; 141. Opening; 15. Sealing ring; 20. Nitrogen generator module; 21. Feed inlet; 22. Nitrogen outlet; 23. First oxygen vent; 231. Third valve; 24. Second oxygen vent; 30. T-connector; 31. First port; 32. Second port; 33. Third port; 40. First pipeline; 41. Fourth valve; 50. Second pipeline; 51. Second valve; 60. Third pipeline; 61. First valve; 70. Vacuum pump; 80. Buffer tank; 90. Air inlet module; 91. Fourth pipeline; 911. Fifth valve. Detailed Implementation
[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0039] Please see Figures 1 to 3This application provides a refrigerator preservation device 100, which includes a preservation compartment 10, a nitrogen generating module 20, a three-way connector 30, a first pipe 40, a second pipe 50, a third pipe 60, a vacuum pump 70, a first valve 61, and a second valve 51. The preservation compartment 10 has an air inlet 11 and an air outlet 12. The nitrogen generating module 20 has a feed inlet 21, a nitrogen outlet 22, a first oxygen vent 23, and a second oxygen vent 24. The three-way connector 30 has a first port 31, a second port 32, and a third port 33. The first pipe 40... One end of the first pipe 50 is connected to the nitrogen outlet 22, and the other end is connected to the air inlet 11; one end of the second pipe 50 is connected to the second oxygen outlet 24, and the other end is connected to the first outlet 31; one end of the third pipe 60 is connected to the second outlet 32, and the other end is connected to the air outlet 12; the vacuum pump 70 is connected to the third outlet 33; the first valve 61 is located on the second pipe 50 to control the opening / closing of the second pipe 50, and the second valve 51 is located on the third pipe 60 to control the opening / closing of the third pipe 60; and the first valve 61 and the second valve 51 are selectively opened. Thus, by setting up the second pipe 50, the third pipe 60, the three-way connector 30, the first valve 61, the second valve 51, and the vacuum pump 70, and selectively opening the first valve 61 and the second valve 51, that is, when the first valve 61 is open, the second valve 51 is closed, or the first valve 61 is closed and the second valve 51 is open. Thus, when the first valve 61 is open and the second valve 51 is closed, the vacuum pump 70 can evacuate the nitrogen generating module 20, thereby removing oxygen from the nitrogen generating module 20 and ensuring a more thorough oxygen removal process, thus guaranteeing the nitrogen generating efficiency of the nitrogen generating module 20. When the first valve 61 is closed and the second valve 51 is open, the vacuum pump 70 can evacuate the preservation compartment 10. If the vacuum pump 70 evacuates the preservation compartment 10 before filling it with nitrogen, it can first remove some oxygen from the preservation compartment 10. This ensures that after filling with nitrogen, almost all of the nitrogen is used to create a high-nitrogen, low-oxygen environment for preservation, thereby improving the utilization rate of nitrogen. At the same time, if the preservation compartment 10 is evacuated after being filled with nitrogen, it can create a negative pressure state, thus achieving dual preservation through negative pressure and nitrogen, resulting in a better preservation effect.
[0040] In one embodiment, the refrigerator preservation device 100 performs nitrogen generation and oxygen removal to preserve food inside the preservation compartment 10, comprising at least one nitrogen generation cycle. One nitrogen generation cycle includes *a* cycles, where *a* is an integer greater than or equal to 1. It should be explained that the nitrogen generation cycle is as follows: vacuum pump 70 performs vacuuming of the preservation compartment 10, nitrogen generation module 20 performs nitrogen generation, after nitrogen generation is completed, nitrogen generation module 20 removes oxygen, vacuum pump 70 performs vacuuming of the preservation compartment 10 again, and vacuum pump 70 performs vacuuming of nitrogen generation module 20. Simultaneously, there is a stop period between two adjacent nitrogen generation cycles, which can be 3 hours, 4 hours, 5 hours, etc. One cycle is set as: nitrogen generation module 20 performs nitrogen generation once, with an interval of *n* hours. The value of *a* can be 2-12, etc. For example, the value of *a* can be 2, 5, 6, 8, 10, 12, etc.
[0041] Here, the number of nitrogen generation cycles can be set according to the characteristics of the food to be preserved or the refrigerator's own control logic. For example, when the refrigerator leaves the factory, it is set to have two nitrogen generation cycles per day, meaning that two nitrogen generation cycles will be completed within a preset time. Alternatively, the setting can be based on the characteristics of the food to be preserved. For example, fresh meat and fish generally have a refrigerated shelf life of 1-2 days. Therefore, within this shelf life, three or four nitrogen generation cycles can be set, and then the three or four nitrogen generation cycles will be completed within 1-2 days. Similarly, for vegetables, leafy greens have a refrigerated shelf life of 7-10 days. Therefore, within this shelf life, ten or twelve nitrogen generation cycles can be set, and then the ten or twelve nitrogen generation cycles will be completed within 7-10 days. The above are merely illustrative examples. Different foods have different shelf lives, and the specific settings can be adjusted according to the different characteristics of the food. Since the specific setting method is not the focus of this application, it will not be elaborated here.
[0042] like Figure 3 As shown, the preservation compartment 10 includes a compartment body 13, a drawer 14, and a sealing ring 15. An opening 131 is provided on one side of the compartment body 13, with an air inlet 11 and an air outlet 12 located on the compartment body 13. The sealing ring 15 surrounds the opening 131, and the drawer 14 is pulled out and installed inside the compartment body 13 through the opening 131. When the drawer 14 is closed, it abuts against the sealing ring 15 to seal. Thus, by allowing the drawer 14 to be pulled out and sealed with the sealing ring 15, users can easily store food by pulling out the drawer 14. When the drawer 14 is pushed into the compartment body 13, the sealing ring 15 ensures a good seal between the drawer 14 and the compartment body 13, preventing nitrogen leakage and maintaining a high-nitrogen, low-oxygen environment inside, thereby preserving the contents.
[0043] Here, the material of the sealing ring 15 can be configured as rubber, plastic, thermoplastic elastomer, or other materials.
[0044] Preferably, the side of drawer 14 facing the air inlet 11 is set as an open opening 141. In this way, there is no obstruction between drawer 14 and the compartment 13 that would hinder other flows, allowing nitrogen to better participate in the preservation of the items inside drawer 14.
[0045] like Figure 1 and Figure 2 As shown, a third valve 231 is provided at the first oxygen vent 23 of the nitrogen generator module 20. The third valve 231 is used to control the opening and closing of the first oxygen vent 23. By setting the third valve 231, the third valve 231 is opened when it is necessary to vent gas from the nitrogen generator module 20, and closed at other times, so that the inside of the nitrogen generator module 20 is in a sealed environment, and the first oxygen vent 23 will not affect the evacuation of the nitrogen generator module 20.
[0046] Here, the third valve 231 can be configured as a solenoid valve, pneumatic valve, manual valve, or other similar structures.
[0047] In this embodiment, the nitrogen generation module 20 is configured as a molecular sieve tower, which separates nitrogen and oxygen in the air by adsorbing oxygen through internal molecular sieves. Specifically, the molecular sieve tower can be a multi-molecular sieve tower or a single-molecular sieve tower. Of course, in other embodiments, the nitrogen generation module 20 can also be composed of components such as an adsorbent tank or a nitrogen-oxygen separation membrane.
[0048] Furthermore, a fourth valve 41 is installed on the first pipeline 40 connected to the nitrogen generating module 20. The fourth valve 41 can open / close the first pipeline 40 in response to the pressure difference between the nitrogen generating module 20 and the preservation compartment 10. In this way, when the nitrogen generating module 20 is generating nitrogen, a certain pressure can be maintained inside the nitrogen generating module 20 to ensure the nitrogen-oxygen separation effect of the nitrogen generating module 20. Here, the fourth valve 41 can be configured as a solenoid valve, pressure shut-off valve, pneumatic valve, or other structures.
[0049] In this embodiment, the fourth valve 41 is configured as a pressure shut-off valve. This allows for timely response to the pressure difference between the nitrogen generating module 20 and the preservation compartment 10, enabling the first pipeline 40 to be opened / closed automatically without manual intervention, thus improving the automation level of the refrigerator preservation device 100. Simultaneously, since the first pipeline 40 is opened or closed in response to pressure, the pressure within the nitrogen generating module 20 during nitrogen generation is ensured to be sufficient, thereby improving nitrogen generation efficiency and effectiveness.
[0050] like Figure 2As shown, in one embodiment, the three-way connector 30, the first valve 61, and the second valve 51 are integrated into a single three-way valve, which is configured as a three-way solenoid valve. By integrating the three-way connector 30, the first valve 61, and the second valve 51 into a single three-way valve, the number of components and connection structures connecting the vacuum pump 70 to the nitrogen generator module 20 and the preservation compartment 10 are reduced. This not only makes the overall structure of the device more compact but also simplifies the installation process, thereby improving the assembly efficiency of the refrigerator preservation device 100. Here, the first valve 61 and the second valve 51 can be configured as solenoid valves, pneumatic valves, manual valves, or other similar structures.
[0051] Please refer to Figure 1 and Figure 2 As shown, a buffer tank 80 is installed between the vacuum pump 70 and the third port 33. When the nitrogen generating module 20 vents oxygen, the high internal pressure will cause a strong instantaneous impact force. The buffer tank 80, placed between the vacuum pump 70 and the third port 33, can play a buffering role, avoiding damage to the vacuum pump 70 caused by the instantaneous impact force generated by the nitrogen generating module 20, and ensuring the safe use of the vacuum pump 70.
[0052] In one embodiment, the first valve 61 is opened at least twice within a nitrogen generation cycle. One opening is before the nitrogen generation module 20 generates nitrogen, allowing the vacuum pump 70 to evacuate the preservation compartment 10 before nitrogen generation. The remaining openings are after the preservation compartment 10 is filled with nitrogen and the nitrogen generation module 20 is closed, allowing the vacuum pump 70 to evacuate the preservation compartment 10 after nitrogen generation. This configuration uses the vacuum pump 70 to create a negative pressure state inside the preservation compartment 10, further reducing the oxygen content. The combination of nitrogen and negative pressure provides dual preservation, enhancing the preservation capability of the refrigerator preservation device 100 and resulting in better preservation performance.
[0053] In one embodiment, the refrigerator preservation device 100 further includes an air intake module 90, which is connected to the feed inlet 21 via a fourth pipe 91. A fifth valve 911 is provided on the fourth pipe 91 to control its opening and closing. Thus, by providing the fifth valve 911, it is opened when the nitrogen generating module 20 is receiving air and closed at other times, ensuring a sealed environment inside the nitrogen generating module 20. This prevents the nitrogen generating module 20 from being affected by the fourth pipe 91 when a vacuum is applied. Here, the fifth valve 911 can be configured as a solenoid valve, pneumatic valve, manual valve, etc., and the air intake module 90 can be configured as an air pump, compressor, etc.
[0054] The working principle of the refrigerator's food preservation device 100 is explained below:
[0055] Vacuuming the preservation compartment 10: First valve 61 is opened, second valve 51 is closed, vacuum pump 70 is connected to air outlet 12 through third pipeline 60 and vacuums the preservation compartment 10 through air outlet 12. After the vacuuming action is completed, vacuum pump 70 is closed and first valve 61 is closed, so that the preservation compartment 10 is in a negative pressure state.
[0056] Nitrogen generation: The fifth valve 911 is opened, and the air intake module 90 and the nitrogen generation module 20 are connected through the fourth pipeline 91. The air intake module 90 operates to intake air, and the nitrogen generation module 20 performs nitrogen generation by separating nitrogen and oxygen. The third valve 231 is closed, and the fourth valve 41 is opened. Nitrogen gas enters the fresh food compartment 10 from the outlet 12 of the nitrogen generation module 20 through the first pipeline 40 and the air intake 11 of the fresh food compartment 10, so that the gas environment of the fresh food compartment 10 rises to the atmospheric pressure state. After the air intake operation is completed, the nitrogen generation module 20 stops operating, and the fifth valve 911 and the fourth valve 41 are closed.
[0057] Oxygen venting: When the third valve 231 is opened, oxygen is released to the atmosphere through the first oxygen vent 23. After the oxygen is released, the third valve 231 is closed.
[0058] Vacuuming the nitrogen generator module 20: The second valve 51 is opened, and the vacuum pump 70 runs to evacuate the nitrogen generator module 20, creating a negative pressure environment inside the nitrogen generator module 20. On the one hand, this makes the oxygen desorption more thorough, and on the other hand, it provides power to overcome the airflow resistance and discharge the desorbed oxygen from the nitrogen generator module 20.
[0059] The preservation chamber 10 is evacuated again. The second valve 51 is closed, and the first valve 61 is opened. The vacuum pump 70 is connected to the air outlet 12 through the third pipeline 60, and the vacuum pump 70 evacuates the preservation chamber 10 through the air outlet 12. After the vacuuming process is completed, the vacuum pump 70 is closed, and the second valve 51 is closed, so that the preservation chamber 10 is in a negative pressure state. By coupling the vacuum method and the nitrogen generation method, the oxygen reduction level of the preservation chamber 10 is further improved, thereby enhancing the preservation effect of the preservation chamber 10.
[0060] This application also provides the following technical solution: a refrigerator, including a refrigerator preservation device 100 as described in any of the above embodiments.
[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A refrigerator preservation device, characterized in that, The refrigerator preservation device (100) includes a preservation compartment (10), a nitrogen generating module (20), a three-way connector (30), a first pipeline (40), a second pipeline (50), a third pipeline (60), a vacuum pump (70), a first valve (61), and a second valve (51). The preservation compartment (10) has an air inlet (11) and an air outlet (12), the nitrogen generating module (20) has a feed inlet (21), a nitrogen outlet (22), a first oxygen vent (23) and a second oxygen vent (24), and the three-way connector (30) has a first port (31), a second port (32) and a third port (33); One end of the first pipeline (40) is connected to the nitrogen outlet (22), and the other end is connected to the air inlet (11); one end of the second pipeline (50) is connected to the second oxygen outlet (24), and the other end is connected to the first outlet (31); one end of the third pipeline (60) is connected to the second outlet (32), and the other end is connected to the air outlet (12); The vacuum pump (70) is connected to the third port (33). The first valve (61) is located on the second pipeline (50) and is used to control the opening / closing of the second pipeline (50). The second valve (51) is located on the third pipeline (60) and is used to control the opening / closing of the third pipeline (60). Furthermore, the first valve (61) and the second valve (51) can be opened selectively.
2. The refrigerator preservation device according to claim 1, characterized in that, The three-way connector (30), the first valve (61) and the second valve (51) are integrated into one unit to form a three-way valve, and the three-way valve is configured as a three-way solenoid valve.
3. The refrigerator preservation device according to claim 1, characterized in that, A buffer tank (80) is provided between the vacuum pump (70) and the third port (33).
4. The refrigerator preservation device according to claim 1, characterized in that, A third valve (231) is provided at the first oxygen vent (23), and the third valve (231) is used to control the opening / closing of the first oxygen vent (23).
5. The refrigerator preservation device according to claim 1, characterized in that, The refrigerator preservation device includes at least one nitrogen generation cycle, and each nitrogen generation cycle includes a cycles, where a is an integer greater than or equal to 1; In one nitrogen production cycle, the first valve (61) is opened at least twice; One of the times is set before the nitrogen generating module (20) generates nitrogen, and the vacuum pump (70) is able to evacuate the preservation compartment (10) before the nitrogen generating module (20) generates nitrogen. The remaining times are configured so that after the preservation compartment (10) is filled with nitrogen and the nitrogen generating module (20) is turned off, the vacuum pump (70) is able to evacuate the preservation compartment (10) after the nitrogen generating module (20) generates nitrogen.
6. The refrigerator preservation device according to claim 1, characterized in that, The preservation compartment (10) includes a compartment body (13), a drawer (14), and a sealing ring (15). The compartment body (13) has an opening on one side, and the air inlet (11) and the air outlet (12) are located on the compartment body (13). The sealing ring (15) surrounds the opening, and the drawer (14) is located inside the compartment body (13) by being pulled out through the opening. When the drawer (14) is closed, the drawer (14) abuts against the sealing ring (15) to seal.
7. The refrigerator preservation device according to claim 6, characterized in that, The drawer (14) is open (141) on the side facing the air inlet (11).
8. The refrigerator preservation device according to claim 1, characterized in that, The refrigerator preservation device (100) also includes an air intake module (90), which is connected to the feed inlet (21) through a fourth pipe (91).
9. The refrigerator preservation device according to claim 1, characterized in that, The nitrogen generation module (20) is configured as a molecular sieve tower.
10. A refrigerator, characterized in that, Includes the refrigerator preservation device (100) as described in any one of claims 1-9.