A pressure relief device and a refrigerator having the same

Abstract

The application provides a pressure relief device, a first air flow channel is arranged on a fixed mechanism, the first air flow channel comprises a first air flow channel A and a first air flow channel B, the first air flow channel A is provided with a first air inlet end A and a first air outlet end A, the first air flow channel B is provided with a first air inlet end B and a first air outlet end B. A second air flow channel is arranged on a movable mechanism, the second air flow channel is provided with a second air inlet end and a second air outlet end, when the pressure relief device is not working, the second air outlet end is not communicated with the first air inlet end B, the first air flow channel is not communicated with the second air flow channel, when the pressure relief device works, the movable mechanism is moved relative to the fixed mechanism, the second air outlet end is communicated with the first air inlet end B, the first air flow channel is communicated with the second air flow channel to form a communicated state, and the second air flow channel is located in the first air flow channel.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and more specifically to a pressure relief device and a refrigerator having the pressure relief device. Background Technology

[0002] Vacuum sealing of food can effectively solve problems such as anti-oxidation, prevention of cross-contamination of odors, and prevention of mold and bacteria, thus keeping food fresh and extending its storage time.

[0003] Vacuum chambers are commonly used in food storage. Under normal preservation conditions, a vacuum chamber simply needs to be vacuumed according to certain control rules. However, in actual use, the vacuum chamber needs to be depressurized beforehand to balance the pressure difference between the inside and outside of the chamber before it can be easily opened and the vacuum-stored food can be removed.

[0004] Traditional vacuum chambers require pressure relief valves and pressure relief pipelines to assist in depressurization, which is costly and prone to damage. Summary of the Invention

[0005] On one hand, an embodiment of the present invention proposes a pressure relief device, characterized in that it includes a fixed mechanism and a movable mechanism, the movable mechanism being movable relative to the fixed mechanism, the side of the fixed mechanism away from the movable mechanism being a first pressure environment; and the side of the movable mechanism away from the fixed mechanism being a second pressure environment.

[0006] A first airflow channel is provided on the fixed mechanism. The first airflow channel includes a first airflow channel A and a first airflow channel B. The first airflow channel A is provided with a first air inlet A and a first air outlet A, and the first airflow channel B is provided with a first air inlet B and a first air outlet B.

[0007] The active mechanism is provided with a second airflow channel, which is provided with a second air inlet and a second air outlet.

[0008] The first air intake end A is connected to the first air pressure environment;

[0009] The first air outlet B is connected to the second pressure environment;

[0010] The first air outlet A is connected to the second air inlet;

[0011] The second air outlet and the first air inlet B are connected or disconnected by a movable mechanism;

[0012] The pressure relief device has a first working state that connects the second air outlet to the first air inlet B and a second working state that disconnects the second air outlet from the first air inlet B.

[0013] When the pressure relief device needs to work, it is put into the first working state; when the pressure relief device does not need to work, it is put into the second working state.

[0014] In the above technical solution, when the pressure relief device needs to work, the movable mechanism moves away from the fixed mechanism so that the second air outlet of the second airflow channel is connected to the first air inlet B of the first airflow channel B.

[0015] In the above technical solution, when the pressure relief device is not working, the movable mechanism and the fixed mechanism are separated by a distance, and the second air outlet of the second airflow channel is not connected to the first air inlet B of the first airflow channel B; when the pressure relief device is working, the movable mechanism moves towards the fixed mechanism, so that the second air outlet of the second airflow channel is connected to the first air inlet B of the first airflow channel B, and the first airflow channel A, the second airflow channel, and the first airflow channel B form an air balance channel that connects the first air pressure environment and the second air pressure environment.

[0016] In the above technical solution, when the pressure relief device is not working, the movable mechanism is close to the fixed mechanism, and the second air outlet of the second airflow channel is not connected to the first air inlet B of the first airflow channel B; when the pressure relief device is working, the movable mechanism moves away from the fixed mechanism, so that the second air outlet of the second airflow channel is connected to the first air inlet B of the first airflow channel B, and the first airflow channel A, the second airflow channel, and the first airflow channel B form an air balance channel that connects the first air pressure environment and the second air pressure environment.

[0017] In the above technical solution, the moving mechanism includes a slider, a protrusion formed on the slider, and a control end that extends into or is exposed to the first pressure environment.

[0018] The fixed mechanism has a guide hole and a guide groove, which are arranged along the relative movement direction of the fixed mechanism and the movable mechanism, and the guide hole is formed on the groove surface of the guide groove. The slider is limited in the guide groove, and the protrusion is limited in the guide hole.

[0019] The control terminal can cause the moving mechanism to move away from or towards the fixed mechanism.

[0020] In the above technical solution, the control terminal can be a manual control terminal or an automatic control terminal.

[0021] In the above technical solution, when the control end is a manual control end, the control end includes a push-pull member formed on the slider. The push-pull member extends toward the first airflow channel A and at least partially passes through the first airflow channel A to extend into the first air pressure environment.

[0022] The push-pull component has a third airflow channel, the air inlet of which is connected to the first air pressure environment and the air outlet of which is connected to the second airflow channel.

[0023] In the above technical solution, a spring is also connected between the moving mechanism and the fixed mechanism. The spring is embedded in the guide hole and sleeved on the protrusion.

[0024] In the above technical solution, two sets of protruding pillars are provided, and the two sets of protruding pillars are symmetrically arranged with the first airflow channel A as the center.

[0025] In the above technical solution, the first airflow channel B is provided in two sets, and the two sets of first airflow channels B are symmetrically arranged with the first airflow channel A as the center of symmetry.

[0026] The first airflow channel B is an L-shaped channel.

[0027] On the other hand, this embodiment of the invention also provides a refrigerator, including a vacuum preservation drawer, a modified atmosphere preservation drawer, and a pneumatic control system, wherein the pneumatic control system includes a pressure relief device as described in any one of claims 1-10.

[0028] The pneumatic control system is connected to the vacuum preservation drawer and the modified atmosphere preservation drawer to control the pressure of the vacuum preservation drawer and the air composition of the modified atmosphere preservation drawer.

[0029] The pressure relief device is installed on the vacuum preservation drawer and is used to manually inject air into the vacuum preservation drawer so that the vacuum preservation drawer can still be pulled out normally when the pressure relief function in the pneumatic control system malfunctions.

[0030] In the above technical solution, the pneumatic control system includes an exhaust control unit, a vacuum preservation control unit, and a modified atmosphere preservation control unit, wherein...

[0031] The vacuum preservation control unit is connected to the vacuum preservation drawer to control the pressure of the vacuum preservation drawer, so that food is preserved in a vacuum environment.

[0032] The modified atmosphere storage control unit is connected to the modified atmosphere storage drawer and controls the air composition of the drawer to preserve food in an oxygen-deficient environment.

[0033] The exhaust control unit controls the exhaust of the vacuum preservation control unit and the modified atmosphere preservation control unit.

[0034] In the above technical solution, the vacuum preservation control unit includes a first check valve, a first pressure relief valve, and a pressure relief device as described in any one of claims 1-9.

[0035] The air inlet of the first one-way valve is connected to the first vacuum preservation drawer of the refrigerator, and the air outlet of the first one-way valve is connected to the air inlet of the exhaust control unit. The first one-way valve is used to discharge the air in the first vacuum preservation drawer to make it reach a vacuum state.

[0036] The outlet of the first pressure relief valve is connected to the first vacuum preservation drawer, and the inlet of the first pressure relief valve is connected to the mechanical chamber of the refrigerator. The first pressure relief valve is used to inject air into the first vacuum preservation drawer when it is difficult to pull out due to negative pressure, so that the first vacuum preservation drawer can be easily pulled out.

[0037] The pressure relief device is installed on the first vacuum preservation drawer and is used to manually inject air into the first vacuum drawer so that the first vacuum preservation drawer can be pulled out normally even if the first pressure relief valve malfunctions.

[0038] In the above technical solution, the vacuum preservation control unit also includes a first three-way valve, a second one-way valve, and a second pressure relief valve.

[0039] The first inlet of the first three-way valve is connected to the outlet of the first one-way valve, the second inlet of the first three-way valve is connected to the outlet of the second one-way valve, and the outlet of the first three-way valve is connected to the inlet of the exhaust control unit.

[0040] The air inlet of the second one-way valve is connected to the second vacuum preservation drawer of the refrigerator, the air outlet of the second pressure relief valve is connected to the second vacuum preservation drawer, and the air outlet of the second pressure relief valve is connected to the mechanical chamber or water tray of the refrigerator. The second pressure relief valve is used to inject air into the second vacuum preservation drawer when it is difficult to pull out due to negative pressure, so that the second vacuum preservation drawer can be easily pulled out.

[0041] In the above technical solution, the vacuum preservation control unit includes a second three-way valve, a first pressure relief valve, and a second pressure relief valve.

[0042] The first air inlet of the second three-way valve is connected to the first vacuum preservation drawer, the second air inlet of the second three-way valve is connected to the second vacuum preservation drawer, and the air outlet of the second three-way valve is connected to the air inlet of the exhaust control unit.

[0043] The outlet of the first pressure relief valve is connected to the first vacuum preservation drawer, and the outlet of the first pressure relief valve is connected to the mechanical chamber or water drip tray of the refrigerator.

[0044] The outlet of the second pressure relief valve is connected to the second vacuum preservation drawer, and the outlet of the second pressure relief valve is connected to the refrigerator's mechanical compartment or drip tray.

[0045] In the above technical solution, the modified atmosphere preservation control unit includes a third one-way valve and a first modified atmosphere membrane assembly.

[0046] The inlet end of the third one-way valve is connected to the outlet end of the first controlled atmosphere membrane assembly, and the outlet end of the third one-way valve is connected to the inlet end of the exhaust control unit. The third one-way valve is used to discharge the oxygen discharged by the first controlled atmosphere membrane assembly.

[0047] The air inlet of the first modified atmosphere film assembly is connected to the first modified atmosphere preservation drawer of the refrigerator, and the air outlet of the first modified atmosphere film assembly is connected to the air inlet of the third one-way valve. The first modified atmosphere film assembly is used to extract oxygen from the modified atmosphere preservation drawer.

[0048] In the above technical solution, the modified atmosphere preservation control unit also includes a third three-way valve, a fourth one-way valve, and a second modified atmosphere membrane assembly.

[0049] The first inlet of the third three-way valve is connected to the outlet of the third one-way valve, the second inlet is connected to the outlet of the fourth one-way valve, and the outlet of the third three-way valve is connected to the inlet of the exhaust control unit.

[0050] The air inlet of the fourth one-way valve is connected to the air outlet of the second modified atmosphere film assembly, and the air inlet of the second modified atmosphere film assembly is connected to the second modified atmosphere preservation drawer.

[0051] In the above technical solution, the modified atmosphere preservation control unit includes a fourth three-way valve, a first modified atmosphere film assembly, and a second modified atmosphere film assembly.

[0052] The first inlet of the fourth three-way valve is connected to the outlet of the first controlled atmosphere membrane assembly, the second inlet is connected to the outlet of the second controlled atmosphere membrane assembly, and the outlet of the fourth three-way valve is connected to the inlet of the exhaust control unit.

[0053] The air inlet of the first modified atmosphere module assembly is connected to the first modified atmosphere preservation drawer, and the air inlet of the second modified atmosphere module assembly is connected to the second modified atmosphere preservation drawer.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] I. The pressure relief device in this invention can achieve the pressure relief function simply by changing the position of the movable mechanism relative to the fixed mechanism. It is simple, easy to operate, and not easily damaged.

[0056] Second, by incorporating this structure into the refrigerator, this invention ensures that even if the pressure relief function in the refrigerator's pneumatic control system malfunctions, the pressure relief device can still achieve the desired pressure relief effect and allow the vacuum-sealed crisper drawer to be pulled out normally. Furthermore, during pressure relief, the pressure relief device and the pneumatic control system can be activated simultaneously, allowing for both methods to work concurrently and accelerating the pressure relief process.

[0057] Third, this invention designs a pneumatic control system to simultaneously control the vacuum preservation drawer and the modified atmosphere preservation drawer of the refrigerator. The structure is simple, the cost is reduced, and the user experience and quality of life are improved. Attached Figure Description

[0058] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 This is a three-dimensional structural schematic diagram of a pressure relief device according to an embodiment of the present invention. The pressure relief device in the figure is in a non-pressure relief state.

[0060] Figure 2 This is a schematic diagram of a second three-dimensional structure of the pressure relief device according to an embodiment of the present invention. The pressure relief device in the figure is in a pressure relief state.

[0061] Figure 3 This is a first cross-sectional view of the pressure relief device according to an embodiment of the present invention. The pressure relief device in the figure is in a non-pressure relief state.

[0062] Figure 4 This is a top view schematic diagram of a first type of pressure relief device according to an embodiment of the present invention. The pressure relief device in the figure is in a pressure relief state.

[0063] Figure 5 This is a second cross-sectional view of the pressure relief device according to an embodiment of the present invention. The pressure relief device in the figure is in a non-pressure relief state.

[0064] Figure 6 This is a second top view of the pressure relief device according to an embodiment of the present invention, in which the pressure relief device is in a pressure relief state;

[0065] Figure 7 A schematic diagram of the structure of an embodiment of the refrigerator of the present invention;

[0066] Figure 8 This is a schematic diagram of a refrigerator according to an embodiment of the present invention, showing a pressure relief device installed on the vacuum preservation drawer.

[0067] Figure 9 This is a schematic diagram illustrating the working principle of the pneumatic control system in an embodiment of the refrigerator of the present invention.

[0068] Figure 10 This is a schematic diagram illustrating the working principle of another pneumatic control system according to an embodiment of the refrigerator of the present invention. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0071] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0072] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0073] Example 1

[0074] An embodiment of the present invention provides, such as Figures 1-2 The pressure relief device shown includes a fixed mechanism 1 and a movable mechanism 2, wherein the movable mechanism 2 is movable relative to the fixed mechanism 1, the side of the fixed mechanism 1 away from the movable mechanism 2 is a first pressure environment, and the side of the movable mechanism away from the fixed mechanism is a second pressure environment.

[0075] A first airflow channel 11 is also provided on the fixed mechanism 1. The first airflow channel 11 includes a first airflow channel A111 and a first airflow channel B112. The first airflow channel A111 is provided with a first air inlet A and a first air outlet A. The first air inlet A faces the first atmospheric pressure environment, and the first air outlet A faces the movable mechanism 2. The first airflow channel B112 is provided with a first air inlet B and a first air outlet B. The first air inlet B faces the movable mechanism 2, and the first air outlet B faces the second atmospheric pressure environment. A second airflow channel 21 is provided on the movable mechanism 2. The second airflow channel 21 is provided with a second air inlet and a second air outlet. Specifically, the first air inlet A is connected to the first atmospheric pressure environment, the first air outlet B is connected to the second atmospheric pressure environment, and the first air outlet A is connected to the second air inlet.

[0076] The second air outlet and the first air inlet B are connected or disconnected by the movable mechanism 2. Specifically, the pressure relief device has a first working state that connects the second air outlet and the first air inlet B and a second working state that disconnects the second air outlet and the first air inlet B.

[0077] When the pressure relief device is installed on the vacuum chamber, it can be put into the first working state when it is needed to maintain the balance between the first and second atmospheric pressure environments, thereby relieving the pressure in the vacuum chamber and making it easier to open the vacuum chamber. When the pressure relief device is not needed, it can be put into the second working state, in which the pressure relief device can maintain the vacuum state in the vacuum chamber.

[0078] For ease of explanation, the following explanation will use atmospheric pressure as the first pressure environment and the pressure inside the vacuum chamber as the second pressure environment as an example.

[0079] like Figure 1 and Figure 2 As shown, when the pressure relief device needs to work, the movable mechanism 2 can be moved away from the fixed mechanism 1 so that the second air outlet of the second airflow channel 21 is connected to the first air inlet B of the first airflow channel B112.

[0080] Specifically, such as Figure 3 As shown, when the pressure relief device is not working, there is a distance between the movable mechanism 2 and the fixed mechanism 1, and at this time, the second air outlet of the second airflow channel 21 and the first air inlet B of the first airflow channel B112 are not connected. When the pressure relief device is working, as shown... Figure 4As shown, the movable mechanism 2 moves closer to the fixed mechanism 1, connecting the second outlet of the second airflow channel 21 with the first inlet B of the first airflow channel B112. At this point, the first airflow channel A111, the second airflow channel 21, and the first airflow channel B112 form a gas balance channel connecting the first and second pressure environments. This allows gas in the first pressure environment to enter the second pressure environment through the aforementioned airflow channel, thus completing the depressurization process of the vacuum chamber.

[0081] The composition of the moving mechanism 2 and the fixed mechanism 1 will be explained in detail below:

[0082] like Figure 3 and Figure 4 As shown, the active mechanism 2 includes a slider 22, a protrusion 23 formed on the slider 22, and a control end that extends into or is exposed to the first pressure environment.

[0083] The fixed mechanism 1 has a guide hole 12 and a guide groove 13. The guide hole 12 and the guide groove 13 are arranged along the relative movement direction of the fixed mechanism 1 and the movable mechanism 2, and the guide hole 12 is formed on the groove surface of the guide groove 13. The slider 22 is limited in the guide groove 13, and the protrusion 23 is limited in the guide hole 12. By setting the matching slider 22 and guide groove 13 and the matching protrusion 23 and guide hole 12, the stability of the movable mechanism 2 when moving relative to the fixed mechanism 1 can be improved.

[0084] The control terminal can move the movable mechanism 2 away from or towards the fixed mechanism 1 to achieve the depressurization operation of the vacuum chamber.

[0085] Specifically, the control end can be divided into a manual control end or an automatic control end. When the control end is an automatic control end, the control end can be a pneumatic drive mechanism or an electric drive mechanism. The aforementioned automated drive mechanism, in conjunction with the controller, can realize the movement of the movable mechanism 2 relative to the fixed mechanism 1, thereby realizing the pressure relief operation of the aforementioned pressure relief device.

[0086] When the control terminal is a manual control terminal, such as Figure 5 and Figure 6 As shown, the control terminal at this time includes a push-pull member 3 formed on the slider 22. The push-pull member 3 extends toward the first airflow channel A111 and at least partially passes through the first airflow channel A111 to the first air pressure environment (i.e., the atmospheric environment). The push-pull member 3 has a third airflow channel 31. The air inlet of the third airflow channel 31 is connected to the first air pressure environment, and the air outlet is connected to the second airflow channel 21.

[0087] When it is necessary to depressurize the vacuum chamber, simply pull the push-pull component 3 to move the movable mechanism 2 toward the fixed mechanism. When the fixed mechanism 1 and the movable mechanism 2 are in contact, the gas in the first atmospheric pressure environment (i.e., ambient atmospheric pressure) can enter the second atmospheric pressure environment (i.e., the vacuum chamber) in sequence through the third airflow channel 31, the second airflow channel 21 and the first airflow channel B111, thereby completing the depressurization operation of the vacuum chamber.

[0088] like Figure 5 As shown, in order to enable the pressure relief device to automatically return to the non-pressure relief device after pressure relief, a spring is also connected between the movable mechanism 2 and the fixed mechanism 1 in this embodiment. The spring is embedded in the guide hole 12 and sleeved on the protrusion 23. When no force is applied to the push-pull member 3, the spring force can ensure that the fixed mechanism 1 and the movable mechanism are in a front-to-back separated state (i.e., the two are in a non-connected state).

[0089] Furthermore, in order to further improve the stability of the moving mechanism 2 when moving relative to the fixed mechanism 1, such as... Figures 3-6 As shown, in this embodiment, the protruding pillars 23 are arranged in two groups, and the corresponding guide holes 12 are also arranged in two groups. The two groups of protruding pillars 23 are symmetrically arranged with the first airflow channel A111 as the center.

[0090] It is worth noting that the aforementioned first airflow channel B112 is also provided in two sets, and the two sets of first airflow channels B112 are symmetrically arranged with the first airflow channel A111 as the center of symmetry. Specifically, the two symmetrical first airflow channels B112 are L-shaped channels. More specifically, in order to reduce the noise during depressurization, the corners of the L-shaped channels are rounded to prevent the gas from impacting the corners during flow and generating large noise.

[0091] On the other hand, the embodiments of the present invention also provide a method such as Figures 7-9 The refrigerator shown includes a vacuum preservation drawer 4, a modified atmosphere preservation drawer 5, and a pneumatic control system. The pneumatic control system includes the aforementioned pressure relief device. The pneumatic control system is connected to the vacuum preservation drawer 4 and the modified atmosphere preservation drawer 5, controlling the pressure in the vacuum preservation drawer 4 and the air composition in the modified atmosphere preservation drawer. The pressure relief device is located on the vacuum preservation drawer 4 and is used to inject air into the vacuum drawer 4, ensuring that the vacuum preservation drawer can still be pulled out normally even if the pressure relief function in the pneumatic control system malfunctions.

[0092] like Figure 9As shown, the pneumatic control system includes an exhaust control unit, a vacuum preservation control unit, and a modified atmosphere preservation control unit. The vacuum preservation control unit is connected to the vacuum preservation drawer and controls the pressure within the drawer to preserve food in a vacuum environment. The modified atmosphere preservation control unit is also connected to the modified atmosphere preservation drawer and controls the air composition within it to preserve food in an oxygen-deficient environment. The exhaust control unit controls the exhaust from both the vacuum preservation control unit and the modified atmosphere preservation control unit.

[0093] Specifically, the exhaust control unit includes a vacuum pump 67 and a fifth three-way valve 68. The first inlet of the fifth three-way valve 68 is connected to the outlet of the vacuum preservation control unit, the second inlet of the fifth three-way valve 68 is connected to the outlet of the modified atmosphere film preservation control unit, and the outlet of the fifth three-way valve 68 is connected to the inlet of the vacuum pump 67. The inlet of the vacuum pump 67 is connected to the outlet of the fifth three-way valve 68, and the outlet of the vacuum pump 67 is connected to the refrigerator's mechanical compartment or drip tray 63.

[0094] The vacuum preservation control unit includes a first one-way valve 61, a first pressure relief valve 62, and the aforementioned pressure relief device. Figure 9 (Not shown in the diagram). The air inlet of the first one-way valve 61 is connected to the first vacuum preservation drawer 41 of the refrigerator, and the air outlet of the first one-way valve 61 is connected to the air inlet of the exhaust control unit. The first one-way valve 61 is used to expel air from the first vacuum preservation drawer 41 to achieve a vacuum state. The air outlet of the first pressure relief valve 62 is connected to the first vacuum preservation drawer 41, and the air inlet of the first pressure relief valve 62 is connected to the refrigerator's mechanical chamber or drip tray 63. The first pressure relief valve 62 is used to inject air into the first vacuum preservation drawer 41 when it is difficult to pull out due to negative pressure, making the first vacuum preservation drawer 41 easier to pull out. The pressure relief device is installed on the first vacuum preservation drawer 41 to inject air into the first vacuum drawer 41, so that the first vacuum preservation drawer 41 can still be pulled out normally even when the first pressure relief valve 71 malfunctions.

[0095] The vacuum preservation control unit also includes a first three-way valve 64, a second one-way valve 65, and a second pressure relief valve 66. The first air inlet of the first three-way valve 64 is connected to the air outlet of the first one-way valve 61, the second air inlet of the first three-way valve 64 is connected to the air outlet of the second one-way valve 65, and the air outlet of the first three-way valve 64 is connected to the air inlet of the exhaust control unit. The air inlet of the second one-way valve 65 is connected to the second vacuum preservation drawer 42, and the air outlet of the second pressure relief valve 66 is connected to the second vacuum preservation drawer 42. The air outlet of the second pressure relief valve 66 is also connected to the refrigerator's mechanical compartment or drip tray 63. The second pressure relief valve 66 is used to inject air into the second vacuum preservation drawer 42 when it is difficult to pull out due to negative pressure, making it easier to pull out.

[0096] In addition, pressure sensors are installed inside the first vacuum preservation drawer 41 and the second vacuum preservation drawer 42 respectively to monitor the pressure value inside the drawer in real time and feed it back to the control system.

[0097] The modified atmosphere storage control unit includes a third one-way valve 71 and a first modified atmosphere film assembly 72. The inlet of the third one-way valve 71 is connected to the outlet of the first modified atmosphere film assembly 72, and the outlet of the third one-way valve 71 is connected to the inlet of the exhaust control unit. The third one-way valve 71 is used to discharge oxygen discharged by the first modified atmosphere film assembly 72. The inlet of the first modified atmosphere film assembly 72 is connected to the first modified atmosphere storage drawer 51 of the refrigerator, and the outlet of the first modified atmosphere film assembly 72 is connected to the inlet of the third one-way valve 71. The first modified atmosphere film assembly 72 is used to extract oxygen from the modified atmosphere storage drawer 51.

[0098] The modified atmosphere storage control unit also includes a third three-way valve 73, a fourth one-way valve 74, and a second modified atmosphere film assembly 75. The first air inlet of the third three-way valve 73 is connected to the air outlet of the third one-way valve 71, the second air inlet is connected to the air outlet of the fourth one-way valve 74, and the air outlet of the third three-way valve 73 is connected to the air inlet of the exhaust control unit. The air inlet of the fourth one-way valve 74 is connected to the air outlet of the second modified atmosphere film assembly 75, and the air inlet of the second modified atmosphere film assembly 75 is connected to the second modified atmosphere storage drawer 52.

[0099] In addition, oxygen concentration sensors are installed inside the first modified atmosphere preservation drawer 51 and the second modified atmosphere preservation drawer 52 respectively to monitor the oxygen concentration value inside the drawer in real time and feed it back to the control system.

[0100] It is worth noting that in some alternative implementations, such as Figure 10 As shown, the vacuum preservation control unit may further include a second three-way valve 64', a first pressure relief valve 62, and a second pressure relief valve 66. The first air inlet of the second three-way valve 64' is connected to the first vacuum preservation drawer 41, the second air inlet of the second three-way valve 64' is connected to the second vacuum preservation drawer 42, and the air outlet of the second three-way valve 64' is connected to the air inlet of the exhaust control unit. The air outlet of the first pressure relief valve 62 is connected to the first vacuum preservation drawer 41 and to the refrigerator's mechanical compartment or drip tray 63. The air outlet of the second pressure relief valve 66 is connected to the second vacuum preservation drawer 42 and to the refrigerator's mechanical compartment or drip tray 63.

[0101] In addition, such as Figure 10As shown, the modified atmosphere storage control unit includes a fourth three-way valve 73', a first modified atmosphere film assembly 72, and a second modified atmosphere film assembly 75. The first air inlet of the fourth three-way valve 73' is connected to the air outlet of the first modified atmosphere film assembly 72, and the second air inlet is connected to the air outlet of the second modified atmosphere film assembly 75. The air outlet of the fourth three-way valve 73' is connected to the air inlet of the exhaust control unit. The air inlet of the first modified atmosphere film assembly 72 is connected to the first modified atmosphere storage drawer 51, and the air inlet of the second modified atmosphere film assembly 75 is connected to the second modified atmosphere storage drawer 52.

[0102] The pressure relief device is installed on the vacuum preservation drawer 4 and is used to inject air into the vacuum preservation drawer 4. The pressure relief process is explained in detail below, taking the control terminal of the pressure relief device as a manual control terminal as an example:

[0103] like Figure 5 As shown, during the depressurization process, the movable mechanism 2 is manually pulled towards the fixed mechanism 1, causing the movable mechanism 2 to move relatively closer to the fixed mechanism 1. At this time, the third airflow channel 31, the second airflow channel 21, and the first airflow channel B112 are connected. The gas in the first pressure environment (i.e., atmospheric pressure, i.e., indoor pressure) flows into the second pressure environment (i.e., the vacuum preservation drawer 4) through the above-mentioned channels, thereby completing the depressurization operation of the vacuum preservation drawer. In this embodiment of the invention, indoor air can be injected into the vacuum preservation drawer through the above-mentioned airflow channels to achieve depressurization of vacuum preservation. When the detection device malfunctions, the depressurization device can still achieve depressurization. At the same time, manual depressurization and automatic depressurization can be carried out simultaneously to accelerate the depressurization speed. This ensures that the vacuum preservation drawer can still be pulled out normally even when the depressurization function in the pneumatic control system malfunctions.

[0104] Example 2

[0105] The difference between this embodiment and Embodiment 1 is that the pressure relief method of the pressure relief device is different: In this embodiment, when the pressure relief device is not working, the movable mechanism 2 is close to the fixed mechanism 1 (instead of Embodiment 1, where there is a distance between the movable mechanism 2 and the fixed mechanism 1 when the pressure relief device is not working). At this time, the second air outlet of the second airflow channel 21 and the first air inlet B of the first airflow channel B112 are not connected (to achieve this effect, it is only necessary to change the setting position of the second airflow channel, and the corresponding figure is not shown in this embodiment); while when the pressure relief device is working, the movable mechanism 2 moves away from the fixed mechanism 1, so that the second air outlet of the second airflow channel 21 is connected to the first air inlet B of the first airflow channel B112, and the first airflow channel A111, the second airflow channel 21, and the first airflow channel B112 form an air balance channel that connects the first air pressure environment and the second air pressure environment.

[0106] In Example 1, the pressure relief operation was achieved by bringing the movable mechanism 2 close to the fixed mechanism 1, while in this example, the pressure relief operation is achieved by moving the movable mechanism 2 away from the fixed mechanism 1.

[0107] However, regardless of which of the above-mentioned pressure relief methods the pressure relief device uses, the pressure relief operation can be completed.

[0108] The pressure relief device and the refrigerator having the pressure relief device provided by the present invention have been described in detail above. Any obvious modifications made by those skilled in the art without departing from the essence of the present invention will constitute an infringement of the patent rights of the present invention and will incur corresponding legal liability.

Claims

1. A pressure relief device, characterized in that, It includes a fixed mechanism (1) and a movable mechanism (2), the movable mechanism (2) being movable relative to the fixed mechanism (1), the side of the fixed mechanism (1) away from the movable mechanism (2) being a first pressure environment; the side of the movable mechanism away from the fixed mechanism being a second pressure environment; A first airflow channel (11) is provided on the fixed mechanism. The first airflow channel includes a first airflow channel A (111) and a first airflow channel B (112). The first airflow channel A (111) is provided with a first air inlet A and a first air outlet A, and the first airflow channel B (112) is provided with a first air inlet B and a first air outlet B. A second airflow channel (21) is provided on the active mechanism (2), and the second airflow channel (21) is provided with a second air inlet and a second air outlet; The first air inlet A is connected to the first air pressure environment; The first air outlet B is connected to the second air pressure environment; The first air outlet A is connected to the second air inlet; The second air outlet and the first air inlet B are connected or disconnected by the movable mechanism (2); The pressure relief device has a first working state that connects the second air outlet to the first air inlet B and a second working state that disconnects the second air outlet from the first air inlet B. When the pressure relief device needs to work, the pressure relief device is put into the first working state; When the pressure relief device is not required to operate, the pressure relief device is put into the second operating state.

2. The pressure relief device according to claim 1, characterized in that, When the pressure relief device needs to work, the movable mechanism (2) moves away from the fixed mechanism (1) so that the second air outlet of the second airflow channel (21) is connected to the first air inlet B of the first airflow channel B (112).

3. The pressure relief device according to claim 2, characterized in that, When the pressure relief device is not working, the movable mechanism (2) is spaced apart from the fixed mechanism (1), and the second outlet of the second airflow channel (21) is not connected to the first inlet of the first airflow channel B (112). When the pressure relief device is working, the movable mechanism (2) moves towards the fixed mechanism (1), so that the second outlet of the second airflow channel (21) is connected to the first inlet of the first airflow channel B (112), and the first airflow channel A (111), the second airflow channel (21), and the first airflow channel B (112) form an air balance channel that connects the first and second air pressure environments.

4. The pressure relief device according to claim 2, characterized in that, When the pressure relief device is not working, the movable mechanism (2) is close to the fixed mechanism (1), and the second outlet of the second airflow channel (21) is not connected to the first inlet of the first airflow channel B (112). When the pressure relief device is working, the movable mechanism (2) moves away from the fixed mechanism (1), so that the second outlet of the second airflow channel (21) is connected to the first inlet of the first airflow channel B (112), and the first airflow channel A (111), the second airflow channel (21), and the first airflow channel B (112) form an air balance channel that connects the first air pressure environment and the second air pressure environment.

5. The pressure relief device according to claim 3 or 4, characterized in that, The active mechanism (2) includes a slider (22), a protrusion (23) formed on the slider (22), and a control end that extends into or is exposed to the first pressure environment; The fixing mechanism (1) has a guide hole (12) and a guide groove (13). The guide hole (12) and the guide groove (13) are arranged along the relative movement direction of the fixing mechanism (1) and the movable mechanism (2), and the guide hole (12) is formed on the groove surface of the guide groove (13). The slider (22) is limited in the guide groove (13), and the protrusion (23) is limited in the guide hole (12). Controlling the control terminal can cause the movable mechanism (2) to move away from or towards the fixed mechanism (1).

6. The pressure relief device according to claim 5, characterized in that, The control terminal can be a manual control terminal or an automatic control terminal.

7. The pressure relief device according to claim 6, characterized in that, When the control terminal is a manual control terminal, the control terminal includes a push-pull member (3) formed on the slider (22), the push-pull member (3) extends toward the first airflow channel A (111) and at least partially passes through the first airflow channel A (111) to the first air pressure environment; The push-pull component (3) has a third airflow channel (31), the air inlet of the third airflow channel (31) is connected to the first air pressure environment, and the air outlet is connected to the second airflow channel (21).

8. The pressure relief device according to claim 7, characterized in that, A spring is also connected between the movable mechanism (2) and the fixed mechanism (1), the spring being embedded in the guide hole (12) and sleeved on the protrusion (23).

9. The pressure relief device according to claim 8, characterized in that, The protruding post (23) is provided in two sets, and the two sets of protruding post (23) are symmetrically arranged with the first airflow channel A (111) as the center.

10. The pressure relief device according to claim 1, characterized in that, The first airflow channel B (112) is provided in two sets, and the two sets of the first airflow channel B (112) are symmetrically arranged with the first airflow channel A (111) as the center of symmetry; The first airflow channel B (112) is an L-shaped channel.

11. A refrigerator, characterized in that, The system includes a vacuum preservation drawer, a modified atmosphere preservation drawer, and a pneumatic control system, wherein the pneumatic control system includes a pressure relief device as described in any one of claims 1-10. The pneumatic control system is connected to the vacuum preservation drawer and the modified atmosphere preservation drawer, and controls the pressure of the vacuum preservation drawer and the air composition of the modified atmosphere preservation drawer. The pressure relief device is installed on the vacuum preservation drawer and is used to manually inject air into the vacuum preservation drawer so that the vacuum preservation drawer can be pulled out normally even when the pressure relief function in the pneumatic control system malfunctions.

12. The refrigerator according to claim 11, characterized in that, The pneumatic control system includes an exhaust control unit, a vacuum preservation control unit, and a modified atmosphere preservation control unit, wherein... The vacuum preservation control unit is connected to the vacuum preservation drawer and controls the pressure of the vacuum preservation drawer to preserve food in a vacuum environment. The modified atmosphere preservation control unit is connected to the modified atmosphere preservation drawer and controls the air composition of the modified atmosphere preservation drawer so that food is preserved in an oxygen-deficient environment. The exhaust control unit controls the exhaust of the vacuum preservation control unit and the modified atmosphere preservation control unit.

13. The refrigerator according to claim 12, characterized in that, The vacuum preservation control unit includes a first check valve, a first pressure relief valve, and a pressure relief device as described in any one of claims 1-9. The air inlet of the first one-way valve is connected to the first vacuum preservation drawer of the refrigerator, and the air outlet of the first one-way valve is connected to the air inlet of the exhaust control unit. The first one-way valve is used to discharge the air in the first vacuum preservation drawer to make it reach a vacuum state. The outlet of the first pressure relief valve is connected to the first vacuum preservation drawer, and the inlet of the first pressure relief valve is connected to the mechanical chamber of the refrigerator. The first pressure relief valve is used to inject air into the first vacuum preservation drawer when it is difficult to pull out due to negative pressure, so that the first vacuum preservation drawer can be easily pulled out. The pressure relief device is installed on the first vacuum preservation drawer and is used to manually inject air into the first vacuum drawer so that the first vacuum preservation drawer can be pulled out normally even when the first pressure relief valve malfunctions.

14. The refrigerator according to claim 13, characterized in that, The vacuum preservation control unit also includes a first three-way valve, a second one-way valve, and a second pressure relief valve. The first air inlet of the first three-way valve is connected to the air outlet of the first one-way valve, the second air inlet of the first three-way valve is connected to the air outlet of the second one-way valve, and the air outlet of the first three-way valve is connected to the air inlet of the exhaust control unit. The air inlet of the second one-way valve is connected to the second vacuum preservation drawer of the refrigerator, the air outlet of the second pressure relief valve is connected to the second vacuum preservation drawer, and the air outlet of the second pressure relief valve is connected to the mechanical chamber or water tray of the refrigerator. The second pressure relief valve is used to inject air into the second vacuum preservation drawer when it is difficult to pull out due to negative pressure, so that the second vacuum preservation drawer can be easily pulled out.

15. The refrigerator according to claim 14, characterized in that, The vacuum preservation control unit includes a second three-way valve, a first pressure relief valve, and a second pressure relief valve. The first air inlet of the second three-way valve is connected to the first vacuum preservation drawer, the second air inlet of the second three-way valve is connected to the second vacuum preservation drawer, and the air outlet of the second three-way valve is connected to the air inlet of the exhaust control unit. The outlet of the first pressure relief valve is connected to the first vacuum preservation drawer, and the outlet of the first pressure relief valve is connected to the mechanical chamber or water drip tray of the refrigerator. The outlet of the second pressure relief valve is connected to the second vacuum preservation drawer, and the outlet of the second pressure relief valve is connected to the mechanical chamber or water tray of the refrigerator.

16. The refrigerator according to claim 13, characterized in that, The modified atmosphere preservation control unit includes a third one-way valve and a first modified atmosphere membrane assembly. The inlet end of the third one-way valve is connected to the outlet end of the first modified atmosphere membrane assembly, and the outlet end of the third one-way valve is connected to the inlet end of the exhaust control unit. The third one-way valve is used to discharge the oxygen discharged by the first modified atmosphere membrane assembly. The air inlet of the first modified atmosphere film assembly is connected to the first modified atmosphere preservation drawer of the refrigerator, and the air outlet of the first modified atmosphere film assembly is connected to the air inlet of the third one-way valve. The first modified atmosphere film assembly is used to extract oxygen from the modified atmosphere preservation drawer.

17. The refrigerator according to claim 16, characterized in that, The modified atmosphere preservation control unit also includes a third three-way valve, a fourth one-way valve, and a second modified atmosphere membrane assembly. The first air inlet of the third three-way valve is connected to the air outlet of the third one-way valve, the second air inlet is connected to the air outlet of the fourth one-way valve, and the air outlet of the third three-way valve is connected to the air inlet of the exhaust control unit. The air inlet of the fourth one-way valve is connected to the air outlet of the second modified atmosphere film assembly, and the air inlet of the second modified atmosphere film assembly is connected to the second modified atmosphere preservation drawer.

18. The refrigerator according to any one of claims 12-17, characterized in that, The modified atmosphere preservation control unit includes a fourth three-way valve, a first modified atmosphere film assembly, and a second modified atmosphere film assembly. The first air inlet of the fourth three-way valve is connected to the air outlet of the first modified atmosphere membrane assembly, the second air inlet is connected to the air outlet of the second modified atmosphere membrane assembly, and the air outlet of the fourth three-way valve is connected to the air inlet of the exhaust control unit. The air inlet of the first modified atmosphere module assembly is connected to the first modified atmosphere preservation drawer, and the air inlet of the second modified atmosphere module assembly is connected to the second modified atmosphere preservation drawer.

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