A heatable air pressure equalizing device

Abstract

The utility model relates to the technical field of frozen storage box, concretely is a kind of pressure equalizing device that can heat, including air inlet pipe, the surface of air inlet pipe is equipped with heating electric wire, and one end of air inlet pipe is provided with electric heating wire switch, and the surface of electric heating wire switch is fixedly connected with power cord, and the end of power cord away from electric heating wire switch is electrically connected with heating electric wire, the inner wall of air inlet pipe is fixedly connected with one-way valve, and the side of air inlet pipe is provided with switch sensor, the utility model, using the control scheme of novel electric heating pressure equalizing device, improve the accuracy, safety and convenience of electric heating, the combination of air inlet pipe and one-way valve, realize the function that can heat, improve the reliability of balance hole, so that frozen storage box can be opened and closed in short time, improve the convenience of user use.

Description

Technical Field

[0001] This utility model relates to the field of cryopreservation box technology, and in particular to a heatable pressure balancing device. Background Technology

[0002] Freezers, also known as freezers, are insulated cabinets with refrigeration units that can freeze and store food and other items for a certain period of time. Their refrigeration principle is the same as that of refrigerators. They are available in upright and horizontal models. In upright models, the evaporator forms the internal shelves, while in horizontal models, the evaporator is installed along the inner wall of the cabinet. Freezers are widely used in homes, businesses, and medical settings. Pressure balancing devices are mainly used in freezers. After the freezer door is closed, the low temperature and pressure inside, coupled with the external environmental pressure being greater than the internal pressure, prevent the door from being reopened. The function of the pressure balancing device is to enable the door to be reopened within a short time, thereby improving the user experience.

[0003] However, the existing pressure balancing technology for cryogenic storage boxes using ball valves and heating wires has low pressure balancing sensitivity. The ball valves need to overcome their own gravity to operate, and they often cannot open properly even when there is a pressure difference between the inside and outside of the box, which affects the pressure balancing efficiency. Under long-term use, gravity can easily cause the ball valves to jam and the seals to fail, reducing the service life and safety of the equipment. Utility Model Content

[0004] The purpose of this invention is to solve the problems of existing pressure balancing technology for cryogenic storage boxes that uses ball valves and heating wires. These technologies have low pressure balancing sensitivity, require the ball valves to overcome their own gravity to operate, and often fail to open properly when there is a pressure difference between the inside and outside of the box, thus affecting pressure balancing efficiency. Under long-term use, gravity can easily cause the ball valves to jam and fail to seal, reducing the service life and safety of the equipment. Therefore, this invention proposes a heatable pressure balancing device.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a heatable air pressure balancing device, including an air inlet pipe, a heating wire sleeved on the surface of the air inlet pipe, an electric heating wire switch at one end of the air inlet pipe, a power cord fixedly connected to the surface of the electric heating wire switch, and an end of the power cord away from the electric heating wire switch electrically connected to the heating wire, a one-way valve fixedly connected to the inner wall of the air inlet pipe, and a switch sensor on one side of the air inlet pipe. The switch sensor is used to determine the closing action of the door. When the door is closed, the sensor is triggered, and the sensor transmits a signal to the control system, which in turn controls the electric heating switch to start the electric heating wire, causing the electric heating balancing device to start working and achieve air pressure balance inside and outside the door. Simultaneously, its accurate detection of the door closing action is a prerequisite for the entire device to start heating and open the one-way valve for air pressure balancing, ensuring that the device only works as needed after the door is closed, avoiding unnecessary energy consumption and erroneous functional triggering.

[0006] Preferably, the inner wall of the air inlet pipe is provided with a filter assembly, which includes a frame. The frame is fixedly connected to the air inlet pipe, and a cylinder is fixedly connected to the surface of the frame. A filter plate is sleeved on the surface of the cylinder. By setting up the filter assembly, gas impurities are intercepted. With the convenient disassembly and maintenance structure, dust can be effectively reduced from entering, maintaining a clean environment inside the box, reducing the risk of sample or item contamination, extending the service life of the internal equipment of the cryopreservation box, and ensuring the cryopreservation effect.

[0007] Preferably, the filter plate has a large number of filter holes on its surface, and the filter holes on the surface of the filter plate are arranged in a circumferential array along the filter plate. By setting the filter plate, impurities in the gas entering through the air inlet pipe are filtered, reducing the entry of dust and other foreign objects into the cryopreservation box, reducing dust contamination of the items stored in the box, ensuring a clean environment inside the box, and preventing dust accumulation from affecting the operation of the equipment or the sample preservation effect. Moreover, the structural design that can be easily disassembled and cleaned ensures that the filtration effect is guaranteed while facilitating maintenance, ensuring the continuity and effectiveness of the filtration function.

[0008] Preferably, the surface of the cylinder is provided with a strip-shaped hole, and a baffle is rotatably connected to the inner wall of the strip-shaped hole on the surface of the cylinder. By setting the baffle, the filter plates abut against each other to limit their position, preventing the filter plates from shifting or falling off when the gas passes through, and ensuring the structural stability of the filter assembly and the normal functioning of the filtration function.

[0009] Preferably, there are two stop bars, which are arranged symmetrically.

[0010] Preferably, the cylinder has a circular hole on its surface, and a push rod is slidably connected to the inner wall of the circular hole on the cylinder surface. A connecting rod is rotatably connected to the surface of the push rod, and the end of the connecting rod away from the push rod is rotatably connected to a stop rod. By setting the connecting rod, when the pressure block is pressed, the pressure block squeezes the push rod to move it. The push rod transmits the thrust to the stop rod through the connecting rod, causing the stop rod to rotate around the fulcrum and retract into the slotted hole, thereby releasing the restriction on the filter plate and allowing the filter plate to be pulled out for cleaning. After the filter plate maintenance is completed, the push rod is released, the spring returns to its original position, and the push rod moves in the opposite direction. The connecting rod then transmits the power again, causing the stop rod to return to its original position and press against the filter plate, thus re-fixing the filter plate. Through the transmission connection of the connecting rod, the coordinated action between the push rod and the stop rod is ensured, so that the disassembly and installation of the filter plate can be smoothly realized.

[0011] Preferably, one end of the push rod is fixedly connected to a pressure block, and a spring is sleeved on the surface of the push rod. The two ends of the spring are fixedly connected to the pressure block and the cylinder, respectively. By setting the spring, a reset force is provided after the filter plate maintenance is completed. When the pressed push rod is released, the unrestrained spring generates elastic force to squeeze the push rod to reset. The push rod drives the connecting rod to move, and the connecting rod in turn drives the stop rod to reset and abut against the filter plate, so that the filter plate is re-fixed at the frame. This ensures the installation stability of the filter assembly, realizes convenient disassembly and reliable fixation of the filter plate, ensures the continuous effectiveness of the filtration function, and avoids the gas filtration effect being affected by the loosening of the filter plate.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, a one-way valve is fixed to the air inlet pipe, and then a heating wire is wound around the surface of the air inlet pipe. The heating wire is connected to the heating wire switch, thus forming a heatable electric heating balancing device. When the door is opened, all devices are inactive. When the door is closed, the door switch sensor detects that the door is closing and controls the heating wire switch to heat. Since the outside air pressure is greater than the inside air pressure, gas passes through the air inlet pipe, opens the one-way valve, and enters the door, achieving air pressure balance between the inside and outside of the door. The heating wire automatically shuts off after 1 minute. By setting up this utility model and adopting a new control scheme for an electric heating air pressure balancing device, the accuracy, safety, and convenience of electric heating are improved. The combination of the air inlet pipe and the one-way valve enables the heating function, improves the reliability of the balancing hole, and allows the freezer to be opened and closed in a short time, improving the convenience for users.

[0014] 2. In this utility model, by setting up a filter assembly, when gas enters through the inlet pipe, the gas passes through the filter plate, which filters impurities in the gas, reducing the amount of dust entering the cryopreservation box. Pressing the pressure block squeezes the push rod, which moves and drives the connecting rod. The connecting rod squeezes the stop rod to rotate, and the stop rod rotates and retracts into the slotted hole. Then, pulling the filter plate allows it to be removed for cleaning. After the filter plate is maintained, it is re-sleeved onto the cylinder, and the push rod is released. The spring, freed from its restraint, generates elastic force that squeezes the push rod to reset. The push rod resets and drives the connecting rod, which drives the stop rod to reset and abut against the filter plate, thus re-fixing the filter plate to the frame. By setting up a filter assembly to intercept gas impurities, combined with a convenient disassembly and maintenance structure, dust entry can be effectively reduced, maintaining a clean environment inside the box, reducing the risk of sample or item contamination, extending the service life of the internal equipment of the cryopreservation box, and ensuring the cryopreservation effect. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a heatable air pressure balancing device is provided for this utility model;

[0016] Figure 2A cross-sectional structural diagram of a heatable air pressure balancing device is provided for this utility model;

[0017] Figure 3 A schematic diagram of the filter assembly structure of a heatable air pressure balancing device is provided for this utility model.

[0018] Figure 4 This invention proposes a heatable air pressure balancing device. Figure 3 A magnified structural diagram at point A;

[0019] Figure 5 A schematic diagram of the frame structure of a heatable air pressure balancing device is provided for this utility model.

[0020] Legend: 1. Inlet pipe; 2. Heating wire; 3. Heating wire switch; 4. Power cord; 5. One-way valve; 6. Filter assembly; 61. Filter plate; 62. Cylinder; 63. Stop bar; 64. Connecting rod; 65. Push rod; 66. Spring; 67. Pressure block; 68. Frame; 7. Switch sensor. Detailed Implementation

[0021] Please see Figures 1-5 This utility model provides a technical solution: a heatable air pressure balancing device.

[0022] This implementation plan includes an air inlet pipe 1, with a heating wire 2 sleeved on its surface. A heating wire switch 3 is installed at one end of the air inlet pipe 1, and a power cord 4 is fixedly connected to the surface of the heating wire switch 3. The end of the power cord 4 furthest from the heating wire switch 3 is electrically connected to the heating wire 2. A one-way valve 5 is fixedly connected to the inner wall of the air inlet pipe 1. A switch sensor 7 is installed on one side of the air inlet pipe 1. The switch sensor 7 is used to determine the closing action of the door. When the door is closed, the sensor is triggered, and the sensor transmits a signal to the control system, which in turn controls the electric heating switch to start the electric heating wire, causing the electric heating balancing device to start working and achieving air pressure balance inside and outside the door. Simultaneously, its accurate detection of the door closing action is a prerequisite for the entire device to start heating and open the one-way valve 5 for air pressure balance, ensuring that the device only works as needed after the door is closed, avoiding unnecessary energy consumption and erroneous function triggering.

[0023] Specifically, the inner wall of the air inlet pipe 1 is provided with a filter assembly 6, which includes a frame 68. The frame 68 is fixedly connected to the air inlet pipe 1, and a cylinder 62 is fixedly connected to the surface of the frame 68. A filter plate 61 is sleeved on the surface of the cylinder 62. By setting up the filter assembly 6, gas impurities are intercepted. With the convenient disassembly and maintenance structure, dust can be effectively reduced from entering, maintaining a clean environment inside the chamber, reducing the risk of sample or item contamination, extending the service life of the internal equipment of the cryopreservation chamber, and ensuring the cryopreservation effect.

[0024] Specifically, the surface of the filter plate 61 is provided with a large number of filter holes, which are arranged in a circumferential array along the surface of the filter plate 61. By setting the filter plate 61, impurities in the gas entering through the air inlet pipe 1 are filtered, reducing the entry of dust and other foreign objects into the cryopreservation box, reducing dust contamination of the items stored in the box, ensuring a clean environment inside the box, and preventing dust accumulation from affecting the operation of the equipment or the sample preservation effect. In addition, the structural design that can be easily disassembled and cleaned ensures the filtration effect while facilitating maintenance, ensuring the continuity and effectiveness of the filtration function.

[0025] Specifically, the surface of the cylinder 62 is provided with a strip-shaped hole, and a baffle 63 is rotatably connected to the inner wall of the strip-shaped hole on the surface of the cylinder 62. By setting the baffle 63, the filter plate 61 is abutted to limit its position, preventing the filter plate 61 from shifting or falling off when the gas passes through, and ensuring the structural stability of the filter assembly 6 and the normal functioning of the filtration function.

[0026] Specifically, there are two stop levers 63, which are arranged symmetrically.

[0027] Specifically, a circular hole is provided on the surface of the cylinder 62, and a push rod 65 is slidably connected to the inner wall of the circular hole on the surface of the cylinder 62. A connecting rod 64 is rotatably connected to the surface of the push rod 65, and the end of the connecting rod 64 away from the push rod 65 is rotatably connected to the stop rod 63.

[0028] In this embodiment: By setting a connecting rod 64, when the pressure block 67 is pressed, the pressure block 67 squeezes the push rod 65 to move it. The push rod 65 transmits the thrust to the stop rod 63 through the connecting rod 64, causing the stop rod 63 to rotate around the fulcrum and retract into the slot, thereby releasing the limit on the filter plate 61, so that the filter plate 61 can be pulled out for cleaning. After the filter plate 61 is maintained, the push rod 65 is released, the spring 66 resets and causes the push rod 65 to move in the opposite direction. The connecting rod 64 transmits again to reset the stop rod 63 and press it against the filter plate 61, thereby re-fixing the filter plate 61. Through the transmission connection of the connecting rod 64, the action coordination between the push rod 65 and the stop rod 63 is ensured, so that the disassembly and installation of the filter plate 61 can be smoothly realized.

[0029] Specifically, a pressure block 67 is fixedly connected to one end of the push rod 65, and a spring 66 is sleeved on the surface of the push rod 65. The two ends of the spring 66 are fixedly connected to the pressure block 67 and the cylinder 62, respectively.

[0030] In this embodiment: by setting a spring 66, a reset force is provided after the filter plate 61 is maintained. When the pressed push rod 65 is released, the unrestrained spring 66 generates elastic force to squeeze the push rod 65 to reset. The push rod 65 drives the connecting rod 64 to move, and the connecting rod 64 in turn drives the stop rod 63 to reset and abut against the filter plate 61, so that the filter plate 61 is re-fixed at the frame 68, ensuring the installation stability of the filter assembly 6, realizing convenient disassembly and reliable fixation of the filter plate 61, ensuring the continuous effectiveness of the filtration function, and avoiding the gas filtration effect being affected by the loosening of the filter plate 61.

[0031] Working principle: The one-way valve 5 is fixed to the air inlet pipe 1, and the heating wire 2 is wound around the surface of the air inlet pipe 1. The heating wire 2 is connected to the heating wire switch 3, thus forming a heatable electric heating balancing device. When the door is opened, all devices are inactive. When the door is closed, the door switch sensor 7 detects that the door is closing and controls the heating wire switch 3 to heat. Since the outside air pressure is greater than the inside air pressure, the gas passes through the air inlet pipe 1, opens the one-way valve 5, and enters the door, achieving air pressure balance between the inside and outside of the door. The heating wire 2 automatically shuts off after 1 minute. By setting up this utility model and adopting a new control scheme for the electric heating air pressure balancing device, the accuracy, safety, and convenience of electric heating are improved. The combination of the air inlet pipe 1 and the one-way valve 5 realizes the heating function, improves the reliability of the balancing hole, and enables the freezer to be opened and closed in a short time, improving the convenience of user use.

[0032] By setting up the filter assembly 6, when gas enters through the inlet pipe 1, the gas passes through the filter plate 61. The filter plate 61 filters impurities in the gas, reducing the amount of dust entering the freezer. Pressing the pressure block 67 causes the pressure block 67 to squeeze the push rod 65. The push rod 65 moves, driving the connecting rod 64. The connecting rod 64 squeezes the stop rod 63 to rotate. The stop rod 63 rotates and retracts into the slotted hole. Then, pulling the filter plate 61 allows it to be removed for cleaning. After the filter plate 61 is maintained, it is re-inserted onto the cylinder 62. The push rod 65 is released, and the spring 66, freed from its restraint, generates elastic force to push the push rod 65 back to its original position. The push rod 65, now back to its original position, drives the connecting rod 64, which in turn drives the stop rod 63 back to its original position and abuts against the filter plate 61. This re-fixes the filter plate 61 to the frame 68. By setting up the filter assembly 6, gaseous impurities are intercepted. Combined with the convenient disassembly and maintenance structure, dust entry can be effectively reduced, maintaining a clean environment inside the chamber, reducing the risk of sample or item contamination, extending the service life of the internal equipment of the cryopreservation chamber, and ensuring the cryopreservation effect.

Claims

1. A heatable air pressure balancing device, comprising an air inlet pipe (1), characterized in that: Heating wire (2) is sleeved on the surface of the air intake pipe (1). A heating wire switch (3) is provided at one end of the air intake pipe (1). A power line (4) is fixedly connected to the surface of the heating wire switch (3). The end of the power line (4) away from the heating wire switch (3) is electrically connected to the heating wire (2). A one-way valve (5) is fixedly connected to the inner wall of the air intake pipe (1). A switch sensor (7) is provided on one side of the air intake pipe (1).

2. The heatable pressure balancing device according to claim 1, characterized in that: The inner wall of the air intake pipe (1) is provided with a filter assembly (6), the filter assembly (6) includes a frame (68), the frame (68) is fixedly connected to the air intake pipe (1), the surface of the frame (68) is fixedly connected to a cylinder (62), and the surface of the cylinder (62) is fitted with a filter plate (61).

3. The heatable pressure balancing device according to claim 2, characterized in that: The filter plate (61) has a large number of filter holes on its surface, and the filter holes on the surface of the filter plate (61) are arranged in a circumferential array along the filter plate (61).

4. A heatable air pressure balancing device according to claim 3, characterized in that: The surface of the cylinder (62) is provided with a strip-shaped hole, and a stop bar (63) is rotatably connected to the inner wall of the strip-shaped hole on the surface of the cylinder (62).

5. A heatable air pressure balancing device according to claim 4, characterized in that: There are two stop bars (63), and the two stop bars (63) are arranged symmetrically.

6. A heatable pressure balancing device according to claim 5, characterized in that: The cylinder (62) has a circular hole on its surface. A push rod (65) is slidably connected to the inner wall of the circular hole on the surface of the cylinder (62). A connecting rod (64) is rotatably connected to the surface of the push rod (65). The end of the connecting rod (64) away from the push rod (65) is rotatably connected to the stop rod (63).

7. A heatable pressure balancing device according to claim 6, characterized in that: One end of the push rod (65) is fixedly connected to a pressure block (67), and a spring (66) is sleeved on the surface of the push rod (65). The two ends of the spring (66) are fixedly connected to the pressure block (67) and the cylinder (62) respectively.

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