Air pressure balancing device of refrigerator

Abstract

The utility model discloses an air pressure balancing device of a refrigerator, which comprises a bottom plate, a protective shell fixedly connected to the upper surface of the bottom plate, an air feeder fixedly connected to the upper surface of the protective shell, an exhaust fan fixedly connected to the upper surface of the protective shell, and a conveying pipe fixedly connected to the output end of the air feeder and the output end of the exhaust fan. The right surface of the refrigerator is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating shaft, the side surface of the rotating shaft is fixedly connected with a main gear, a rotating groove is formed in the rear inner wall of the refrigerator, and the side inner wall of the rotating groove is rotationally connected with a supporting shaft; the side surface of the supporting shaft is fixedly connected with an auxiliary gear, the left surface and the right surface of the auxiliary gear are fixedly connected with sealing gaskets, and the auxiliary gear, the sealing gaskets and the refrigerator are all provided with circulation openings, so that direct freezing of cold air to the valve is avoided, and normal operation of the device in a low-temperature environment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of air pressure balancing technology for freezers, and in particular to an air pressure balancing device for freezers. Background Technology

[0002] Refrigerators, as indispensable refrigeration equipment in modern life and commerce, are widely used in food preservation, pharmaceutical storage, and other fields. During the refrigeration process, the internal temperature of the refrigerator decreases, causing the internal air pressure to be lower than the external ambient air pressure. This pressure difference can cause a series of problems, such as difficulty in opening the door and decreased sealing performance, seriously affecting the normal use and refrigeration effect of the refrigerator. However, in low-temperature environments, the valves in the control delivery pipes of existing refrigerator pressure balancing devices may freeze due to contact with the cold air inside the refrigerator, affecting the stability and reliability of pressure balancing control. For example, Chinese patent "Pressure Balancing Device and Refrigerator" (application number: 202420736494.9) discloses a device where, when the moving part is in the open state, the first and second channels are connected, and when the moving part is in the closed state, the first and second channels are disconnected. This pressure balancing device can release pressure as needed to ensure pressure balance inside and outside the refrigerator, avoiding cold loss when pressure release is not necessary. However, this device may still freeze due to contact with the cold air inside the refrigerator, affecting the stability and reliability of pressure balancing control. Summary of the Invention

[0003] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a pressure balancing device for a freezer. Through the cooperation of a blower and an exhaust fan, it can precisely increase or decrease the internal pressure of the freezer based on the difference between the internal and external pressures, quickly achieving a balance between the internal and external pressures. This effectively avoids problems such as difficulty in opening or closing the freezer door and decreased sealing performance caused by pressure imbalance, ensuring the normal use of the freezer. The motor-driven rotation of the secondary gear and sealing gasket achieves precise control of the airflow inside and outside the freezer. When airflow is not required, the sealing gasket tightly seals the flow port, preventing cold air from directly contacting the valve in the delivery pipe, thus preventing the valve from freezing due to low temperatures. Simultaneously, the motor drive prevents the transmission mechanism from freezing due to prolonged contact with cold air, ensuring the stability and reliability of the pressure balancing control.

[0004] This utility model also provides a pressure balancing device for a freezer as described above, comprising: a base plate; a protective shell fixedly connected to the upper surface of the base plate; a blower fixedly connected to the upper surface of the protective shell; an exhaust fan fixedly connected to the upper surface of the protective shell; a delivery pipe fixedly connected to the output ends of the blower and the exhaust fan; an upper valve provided on the side surface of the delivery pipe; a freezer fixedly connected to the upper surface of the base plate; a motor fixedly connected to the right surface of the freezer; a rotating shaft fixedly connected to the output end of the motor; a main gear fixedly connected to the side surface of the rotating shaft; a rotating groove provided inside the right inner wall of the freezer; a support shaft rotatably connected to the side inner wall of the rotating groove; a secondary gear fixedly connected to the side surface of the support shaft; sealing gaskets fixedly connected to the left and right surfaces of the secondary gear; and flow ports provided for the secondary gear, sealing gaskets, and the freezer. This device helps to prevent cold air from directly freezing the valve, ensuring the normal operation of the pressure balancing device in low-temperature environments.

[0005] According to the present invention, a pressure balancing device for a freezer is provided, wherein the end of the delivery pipe away from the blower and the exhaust fan is fixedly connected to the right surface of the freezer, and the flow port is connected to the delivery pipe. The above device is beneficial to achieving pressure balancing regulation inside and outside the freezer.

[0006] According to the present invention, a pressure balancing device for a freezer is provided, wherein the protective shell covers the motor and is located on the right surface of the freezer. The above device is beneficial for protecting the motor.

[0007] According to the present invention, a pressure balancing device for a freezer is provided, wherein a push plate is fixedly connected to the upper surface of the base plate, and a push rod is provided on the upper surface of the push plate. The above device helps to ensure the smooth operation of the device.

[0008] According to the present invention, a pressure balancing device for a freezer is provided, wherein a side valve is provided on the side surface of the delivery pipe, and the side valve is close to the blower and the exhaust fan. The above device is beneficial to control the airflow.

[0009] According to the present invention, a pressure balancing device for a freezer is provided, wherein a support leg is fixedly connected to the lower surface of the base plate, and the lower end of the support leg is connected to a roller. The above device is beneficial for support and enables the device to move.

[0010] According to the present invention, a pressure balancing device for a freezer is provided, wherein the rotating shaft passes through the right surface of the freezer, and the main gear meshes with the auxiliary gear to rotate. The above device helps to ensure that the motor drives the auxiliary gear to rotate.

[0011] According to the present invention, a pressure balancing device for a freezer is provided, wherein a freezer door is rotatably connected to the left surface of the freezer via a hinge, and a lock handle is provided on the left surface of the freezer door. The above device helps to ensure the freezer's sealing.

[0012] Compared with existing technologies, the air pressure balancing device of this freezer, by setting up a gear transmission mechanism driven by a motor, adds a gear transmission mechanism to control the sealing gasket sealing function in the gas flow channel, effectively avoiding the direct freezing of valves by cold air and ensuring the normal operation of the air pressure balancing device in low-temperature environments. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is a three-dimensional structural diagram of the air pressure balancing device for the refrigerator of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the air pressure balancing device for the freezer of this utility model;

[0016] Figure 3 This is a diagram showing the internal structure of the air pressure balancing device in the freezer of this utility model.

[0017] Figure 4 This utility model relates to a pressure balancing device for a freezer. Figure 3 Enlarged view at point D;

[0018] Figure 5 This is a cross-sectional structural diagram of the air pressure balancing device for the refrigerator of this utility model.

[0019] Legend:

[0020] 1. Base plate; 2. Freezer; 3. Freezer door; 4. Push plate; 5. Push rod; 6. Protective shell; 7. Blower; 8. Exhaust fan; 9. Conveyor pipe; 10. Top valve; 11. Motor; 12. Support leg; 13. Roller; 14. Side valve; 15. Rotating shaft; 16. Main gear; 17. Rotating groove; 18. Support shaft; 19. Sealing gasket; 20. Flow port; 21. Secondary gear. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1 and Figure 2This utility model embodiment provides a pressure balancing device for a freezer, comprising: a base plate 1, a protective shell 6 fixedly connected to the upper surface of the base plate 1, a blower 7 fixedly connected to the upper surface of the protective shell 6, an exhaust fan 8 fixedly connected to the upper surface of the protective shell 6, a conveying pipe 9 fixedly connected to the output ends of the blower 7 and the exhaust fan 8, a freezer 2 fixedly connected to the upper surface of the base plate 1, a freezer door 3 rotatably connected to the left surface of the freezer 2 via a hinge, a lock handle provided on the left surface of the freezer door 3, one end of the conveying pipe 9 away from the blower 7 and the exhaust fan 8 fixedly connected to the right surface of the freezer 2, a flow port 20 connected to the conveying pipe 9, an upper valve 10 provided on the side surface of the conveying pipe 9, a side valve 14 provided on the side surface of the conveying pipe 9, and the side valve 14 being close to the blower 7 and the exhaust fan 8;

[0023] Specifically, the base plate 1 serves as the fundamental support structure for the entire air pressure balancing device, providing an installation platform for components such as the protective shell 6 and the freezer 2, ensuring the overall stability and fixation of the device. The protective shell 6 on the upper surface of the base plate supports the installation of the blower 7 and the exhaust fan 8, and protects the internal motor 11 and freezer door 3, facilitating the user's opening and closing of the freezer 2 for taking out and putting in items. The locking handle on it can be used to lock the freezer door 3 to ensure the safety of the items inside the freezer 2. When the air pressure inside the freezer 2 is lower than the outside air pressure, the upper valve 1 is opened. Open the upper valve 10 and the side valve 14 near the exhaust fan 8, and start the exhaust fan 7. The impeller rotates to draw in outside air, which is then delivered to the freezer 2 through the delivery pipe 9 and the flow port 20. This increases the air pressure inside the freezer 2, bringing it into balance with the outside air pressure. Similarly, when the air pressure inside the freezer 2 is higher than the outside air pressure, open the upper valve 10 and the side valve 14 near the exhaust fan 8, and start the exhaust fan 8. This generates negative pressure, drawing the air inside the freezer 2 out through the flow port 20 and the delivery pipe 9 and discharging it to the outside, thus reducing the air pressure inside the freezer 2 and achieving air pressure balance.

[0024] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A motor 11 is fixedly connected to the right surface of the freezer 2. A protective shell 6 covers the motor 11 and is located on the right surface of the freezer 2. A rotating shaft 15 is fixedly connected to the output end of the motor 11. The rotating shaft 15 passes through the right surface of the freezer 2. A main gear 16 is fixedly connected to the side surface of the rotating shaft 15. A rotating groove 17 is provided inside the right inner wall of the freezer 2. A support shaft 18 is rotatably connected to the side inner wall of the rotating groove 17. A secondary gear 21 is fixedly connected to the side surface of the support shaft 18. The main gear 16 meshes with the secondary gear 21 and rotates. A sealing gasket 19 is fixedly connected to the left and right surfaces of the secondary gear 21. The secondary gear 21, the sealing gasket 19, and the freezer 2 are all provided with flow ports 20. A push plate 4 is fixedly connected to the upper surface of the bottom plate 1. A push rod 5 is provided on the upper surface of the push plate 4. A support leg 12 is fixedly connected to the lower surface of the bottom plate 1. A roller 13 is connected to the lower end of the support leg 12.

[0025] Specifically, to prevent the cold air from directly freezing the valve and affecting the control of the air pressure balance inside the freezer 2, a gear transmission mechanism driven by a motor 11 is installed before entering the delivery pipe 9 to ensure the flow of air in the freezer 2. When the motor 11 starts, its output end drives the rotating shaft 15 to rotate, and the main gear 16 on the rotating shaft 15 rotates accordingly. The main gear 16 meshes with the secondary gear 21, thereby transmitting power to the secondary gear 21, causing the secondary gear 21 to rotate around the support shaft 18 in the rotating groove 17. When the secondary gear 21 rotates, The motor 11 drives the sealing gasket 19, which is fixedly connected to it, to rotate together. When the flow port 20 on the auxiliary gear 21 and the sealing gasket 19 is aligned with the flow port 20 on the freezer 2, gas can circulate inside and outside the freezer 2. When the flow port 20 on the auxiliary gear 21 and the sealing gasket 19 is misaligned with the flow port 20 on the freezer 2, the flow port 20 is closed by the sealing gasket 19, and gas cannot circulate inside and outside the freezer 2. The rotation of the auxiliary gear 21 is controlled by the rotation of the motor 11, which in turn controls the opening and closing of the flow port 20, thereby controlling the gas circulation inside and outside the freezer 2.

[0026] Working principle: The base plate 1 serves as the basic support structure, providing an installation platform for components such as the protective shell 6 and the freezer 2. The protective shell 6 supports and protects the blower 7 and the exhaust fan 8. The freezer door 3 facilitates the user's access to items, and the lock handle ensures the safety of the items. When the air pressure inside the freezer 2 is lower than the outside air pressure, the upper valve 10 and the side valve 14 near the blower 7 are opened, starting the blower 7. The impeller rotates to draw in outside air, which is then delivered to the freezer 2 through the delivery pipe 9 and the flow port 20, increasing the air pressure inside the freezer 2 to balance it with the outside air pressure. When the air pressure inside the freezer 2 is higher than the outside air pressure, the upper valve 10 and the side valve 14 near the exhaust fan 8 are opened, starting the exhaust fan 8. This generates negative pressure, drawing the air inside the freezer 2 out through the flow port 20 and the delivery pipe 9 to the outside, reducing the air pressure inside the freezer 2 to achieve air pressure balance. To prevent cold air from directly freezing the valve and affecting its control, a gear transmission mechanism driven by motor 11 is installed. After motor 11 starts, its output end drives the rotating shaft 15 to rotate, and the main gear 16 on the rotating shaft 15 rotates accordingly. The main gear 16 meshes with the auxiliary gear 21, transmitting power to the auxiliary gear 21, causing the auxiliary gear 21 to rotate around the support shaft 18 in the rotating groove 17. The auxiliary gear 21 drives the sealing gasket 19 to rotate. When the flow port 20 on the auxiliary gear 21 and the sealing gasket 19 is aligned with the flow port 20 on the freezer 2, gas flows inside and outside the freezer 2. When the flow port 20 on the auxiliary gear 21 and the sealing gasket 19 is misaligned with the flow port 20 on the freezer 2, the flow port 20 is closed by the sealing gasket 19, and gas cannot flow inside and outside the freezer 2. By controlling the rotation of the auxiliary gear 21 through the rotation of motor 11, the opening and closing of the flow port 20 is controlled, thereby achieving control over the gas flow inside and outside the freezer 2.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pressure balancing device for a freezer, characterized in that, include: A base plate (1) is provided with a protective shell (6) fixedly connected to its upper surface. A blower (7) is fixedly connected to the upper surface of the protective shell (6). An exhaust fan (8) is fixedly connected to the upper surface of the protective shell (6). A conveying pipe (9) is fixedly connected to the output ends of the blower (7) and the exhaust fan (8). An upper valve (10) is provided on the side surface of the conveying pipe (9). A freezer (2) is fixedly connected to the upper surface of the base plate (1). A motor (11) is fixedly connected to the right surface of the freezer (2). The output end of the refrigerator (2) is fixedly connected to a rotating shaft (15), and a main gear (16) is fixedly connected to the side surface of the rotating shaft (15). A rotating groove (17) is provided inside the right inner wall of the refrigerator (2). A support shaft (18) is rotatably connected to the side inner wall of the rotating groove (17). A secondary gear (21) is fixedly connected to the side surface of the support shaft (18). A sealing gasket (19) is fixedly connected to the left and right surfaces of the secondary gear (21). The secondary gear (21), the sealing gasket (19), and the refrigerator (2) are all provided with a flow port (20).

2. The air pressure balancing device for a freezer according to claim 1, characterized in that, The end of the conveying pipe (9) away from the blower (7) and the exhaust fan (8) is fixedly connected to the right surface of the freezer (2), and the flow port (20) is connected to the conveying pipe (9).

3. The air pressure balancing device for a freezer according to claim 1, characterized in that, The protective shell (6) covers the motor (11) and is located on the right surface of the freezer (2).

4. The air pressure balancing device for a freezer according to claim 1, characterized in that, A push plate (4) is fixedly connected to the upper surface of the base plate (1), and a push rod (5) is provided on the upper surface of the push plate (4).

5. The air pressure balancing device for a freezer according to claim 1, characterized in that, A side valve (14) is provided on the side surface of the conveying pipe (9), and the side valve (14) is close to the blower (7) and the exhaust fan (8).

6. The air pressure balancing device for a freezer according to claim 1, characterized in that, The lower surface of the base plate (1) is fixedly connected to a support leg (12), and the lower end of the support leg (12) is connected to a roller (13).

7. The air pressure balancing device for a freezer according to claim 1, characterized in that, The rotating shaft (15) passes through the right surface of the freezer (2), and the main gear (16) meshes with the auxiliary gear (21) to rotate.

8. The air pressure balancing device for a freezer according to claim 1, characterized in that, The left surface of the freezer (2) is connected to the freezer door (3) by a hinge, and the left surface of the freezer door (3) is provided with a lock handle.

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