Refrigeration device

Abstract

The utility model provides a refrigeration device, including box, door body and communication pipe, the outside wall of door body is equipped with air inlet, and the side of door body towards refrigeration room is equipped with the communication port, one end of communication pipe links with air inlet, and the other end of communication pipe links with the communication port, the pipe wall of communication pipe is equipped with first corrugation, and first corrugation is protruding outward from the pipe wall of communication pipe and forms first recess in the inside of communication pipe, and the arc length of first corrugation along the circumference of communication pipe is less than the circumference length of communication pipe, a plurality of first corrugations are arranged along the axial direction of communication pipe, the pipe wall of communication pipe is equipped with second corrugation that protrudes outward from the pipe wall of communication pipe, and second corrugation forms second recess in the inside of communication pipe, and the arc length of second corrugation along the circumference of communication pipe is less than the circumference length of communication pipe, and a plurality of second corrugations are arranged along the axial direction of communication pipe, first corrugation and second corrugation are divided and are located at the opposite sides of communication pipe, and a plurality of first corrugations and a plurality of second corrugations are sequentially and alternately arranged along the axial direction of communication pipe.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration electrical technology, and mainly to a refrigeration device. Background Technology

[0002] Refrigeration equipment is a device that maintains a constant low temperature to store goods, and it is widely used in modern life and industrial production. For example, freezers have many advantages such as large storage space and high cost performance, and are widely used in shopping malls or other places for food refrigeration.

[0003] A freezer typically consists of a cabinet and a door. The door and cabinet work together to form a refrigeration chamber. When the freezer is refrigerating, the air temperature inside the refrigeration chamber decreases, the volume shrinks, and negative pressure is easily formed. By installing a ventilation component inside the freezer, the refrigeration chamber inside the cabinet can be connected to the outside of the cabinet.

[0004] In related technologies, corrugated pipes are often used as connecting pipes for ventilated components because they are easier to bend and can withstand greater radial pressure. However, when gas flows through a corrugated pipe under negative pressure, it will generate significant noise, and the higher the airflow velocity, the sharper the noise will be, which will affect the user experience. Summary of the Invention

[0005] Based on existing technology, a cooling device is provided to improve the problem of sharp noise from the bellows in the venting assembly.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: One aspect of this application provides a refrigeration device, including a housing forming the outer shell of the refrigeration device, wherein a refrigeration chamber is provided inside the housing; a door movably disposed on the housing for opening or closing the refrigeration chamber; an air inlet is provided on the outer side wall of the door, and a connecting port is provided on the side of the door facing the refrigeration chamber, the connecting port communicating with the refrigeration chamber; a connecting pipe is disposed inside the door, one end of the connecting pipe being connected to the air inlet, and the other end of the connecting pipe being connected to the connecting port, the connecting pipe being used to connect the air inlet and the connecting port; wherein the wall of the connecting pipe is provided with a first corrugation, the first corrugation protruding outward from the wall of the connecting pipe and within the inner wall of the connecting pipe. A first groove is formed in the part, and the arc length of the first corrugation along the circumference of the connecting pipe is less than the circumference of the connecting pipe; multiple first corrugations are provided, and the multiple first corrugations are arranged at intervals along the axial direction of the connecting pipe; the pipe wall of the connecting pipe is provided with a second corrugation, the second corrugation protrudes outward from the pipe wall of the connecting pipe and forms a second groove inside the connecting pipe, the arc length of the second corrugation along the circumference of the connecting pipe is less than the circumference of the connecting pipe; multiple second corrugations are provided, and the multiple second corrugations are arranged at intervals along the axial direction of the connecting pipe; the first corrugations and the second corrugations are respectively located on opposite sides of the connecting pipe, and the multiple first corrugations and the multiple second corrugations are arranged alternately along the axial direction of the connecting pipe.

[0007] The above technical solution has the following advantages or beneficial effects: by placing the first corrugation and the second corrugation on opposite sides of the connecting pipe and arranging them alternately along the axial direction, when the airflow passes through the connecting pipe, the local corrugations on both sides of the connecting pipe generate vortices and fall off in their respective areas, which is conducive to forming two beams of sound waves with opposite phases. This allows the two beams of sound waves to cancel each other out to a certain extent, which can greatly reduce noise energy and significantly reduce the noise generated by the gas flow in the connecting pipe. In particular, it can improve the problem of sharp noise at high flow rates and solve the problem of excessive noise when corrugated pipes are used in the venting components of refrigeration devices in related technologies. On the other hand, since both the first and second corrugations adopt a structure with the pipe wall bulging outwards, the external structure of the connecting pipe is similar to the corrugated external structure of traditional corrugated pipes, giving the connecting pipe a certain elastic deformation capability. Moreover, the bulging first and second corrugations can disperse radial pressure, which can adapt to the squeezing force generated on the pipe body during the foaming process of the door, avoiding the problem of squeezing during the foaming process of the door body or being flattened during use. The connecting pipe of this application not only has the advantage of low noise, but also maintains the characteristic of easy bending of the connecting pipe to avoid bending and flattening of the pipe body. The door of the refrigeration device can be opened and used smoothly during the refrigeration process, and will not cause noise that affects the user's user experience.

[0008] In some embodiments of this application, a refrigeration device is provided, wherein a plurality of first corrugations are arranged at equal intervals along the axial direction of the connecting pipe; and a plurality of second corrugations are arranged at equal intervals along the axial direction of the connecting pipe.

[0009] Another technical solution described above has the following advantages or beneficial effects: According to the formula for vortex shedding frequency, equal spacing between the first corrugations ensures that the vortex shedding frequency generated when the airflow passes through each first corrugation is the same, and equal spacing between the second corrugations ensures that the vortex shedding frequency generated when the airflow passes through each second corrugation is the same. This avoids deviations in the vortex shedding frequency of some corrugations due to uneven spacing between the first or second corrugations, which would affect the interference effect. It also facilitates stable interference and noise reduction of sound waves generated along both sides of the connecting pipe's axial direction.

[0010] In some embodiments of this application, a cooling device is provided in which the distance between any two adjacent first corrugations is equal to the distance between any two adjacent second corrugations.

[0011] Another technical solution described above has the following advantages or beneficial effects: The difference in spacing between the first and second corrugations can easily lead to some vortex shedding frequencies not being able to cancel each other out. Furthermore, the first and second corrugations are arranged alternately along the axial direction; if the spacing on both sides is unequal, unstable noise attenuation can easily occur. By making the spacing between adjacent first and second corrugations equal, according to the formula for the frequency generated by vortex shedding in the corrugated pipe, it can be seen that the vortex shedding frequency generated by the airflow passing through the first corrugation is the same as the vortex shedding frequency generated by the airflow passing through the second corrugation. This ensures that the sound waves on both sides can satisfy the condition of opposite phases at the same frequency during the airflow through the connecting pipe, thereby better eliminating the sharp noise of the gas flow.

[0012] In some embodiments of this application, a cooling device is provided, wherein the first corrugation is disposed opposite to the middle position of two adjacent second corrugations.

[0013] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by setting the first corrugation on one side of the middle position of the two second corrugations, the wave generated by the vortex shedding on one side is lagging behind the wave on the other side and the phase difference is 180°. At the same time, since the interval between any two first corrugations is equal to the interval between any two second corrugations, the vortex shedding frequency generated when the airflow passes through is the same. In this way, two beams of sound waves with the same frequency and opposite phase can interfere with each other, effectively canceling the noise energy, thereby achieving efficient reduction of airflow noise in the connecting pipe.

[0014] In some embodiments of this application, a refrigeration device is provided, wherein the arc length of the first corrugation distributed along the circumference of the connecting pipe is L1, the circumference of any section of the connecting pipe perpendicular to its axial direction is L2, and the ratio of L1 to L2 is in the range of 1 / 3 to 3 / 5.

[0015] Another technical solution mentioned above has the following advantages or beneficial effects: By controlling the ratio of L1 to L2 within the range of 1 / 3 to 3 / 5, it not only maintains the good radial compressive strength of the connecting pipe, allowing it to better adapt to the extrusion force exerted on the pipe body during the foaming process, thus avoiding the problems of compression during foaming or flattening during use, but also effectively improves the problem of excessive overlap of sound waves generated by the first and second corrugations, which leads to mutual interference of airflow disturbances. This facilitates the mutual interference of two sound waves with opposite phases, canceling out the noise energy within the connecting pipe.

[0016] In some embodiments of this application, a refrigeration device is provided, wherein the arc length of the second corrugation distributed along the circumference of the connecting pipe is L3, the circumference of any section of the connecting pipe perpendicular to its axial direction is L2, and the ratio of L3 to L2 is in the range of 1 / 3 to 3 / 5.

[0017] Another technical solution mentioned above has the following advantages or beneficial effects: By controlling the ratio of L3 to L2 within the range of 1 / 3 to 3 / 5, it not only maintains the good radial compressive strength of the connecting pipe, allowing it to better adapt to the extrusion force exerted on the pipe body during the foaming process, thus avoiding the problems of extrusion during foaming or flattening during use, but also effectively improves the problem of excessive overlap of sound waves generated by the first and second corrugations, which leads to mutual interference of airflow disturbances. This facilitates the mutual interference of two sound waves with opposite phases, canceling out the noise energy within the connecting pipe.

[0018] In some embodiments of this application, a refrigeration device is provided, wherein the wall of the connecting pipe includes a first semicircular region and a second semicircular region, the first semicircular region and the second semicircular region being distributed on opposite sides of the connecting pipe; the first corrugation is semicircular and is distributed in the first semicircular region; the second corrugation is semicircular and is distributed in the second semicircular region.

[0019] Another technical solution described above has the following advantages or beneficial effects: Both the first and second corrugations are semicircular and distributed on opposite semicircular regions. Each semicircular region occupies half the circumference of the connecting pipe, which is beneficial because the peaks of the two sound waves can completely cover the troughs during interference, significantly reducing the sharp noise generated by high-velocity gas passing through the connecting pipe. Furthermore, the semicircular first corrugation is evenly distributed along the axial direction of the connecting pipe in the first semicircular region, and the semicircular second corrugation is evenly distributed along the axial direction of the connecting pipe in the second semicircular region. The interval between any adjacent first corrugations is equal to the interval between any adjacent second corrugations, ensuring that the sound waves generated on both sides maintain a 180° phase difference, preventing local phase shifts and achieving comprehensive noise reduction along the axial length of the transmission pipe.

[0020] In some embodiments of this application, a refrigeration device is provided, wherein the connecting pipe includes a corrugated section, the first corrugation and the second corrugation are respectively disposed on opposite sides of the corrugated section, the corrugated section has multiple ends, and the multiple ends of the corrugated section are spaced apart along the axial direction of the connecting pipe.

[0021] Another technical solution described above has the following advantages or beneficial effects: By arranging multiple corrugated segments at intervals along the axial direction of the connecting pipe, the entire pipe section along the axial direction can form multiple segments through which two beams of sound waves with the same frequency and opposite phase interfere with each other, thereby canceling out noise energy and suppressing airflow noise in the connecting pipe. Furthermore, the connecting pipe can be fixed to the door body at the interval between two corrugated segments, which avoids the fixed structure affecting the noise-reducing structure at the corrugated segments.

[0022] In some embodiments of this application, a refrigeration device is provided, wherein the connecting pipe further includes a smooth section, the smooth section being disposed at the interval between two corrugated sections, and the smooth section being used for fixed connection with the interior of the door body.

[0023] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by setting a smooth section at the interval between the two corrugated sections, the smooth section can be directly fixed to the door body by fasteners such as buckles, thereby avoiding direct contact between the fasteners and the corrugated sections. This keeps the spacing between the first and second corrugations and the misalignment distance between them within a reasonable range, and prevents deformation due to the interaction force between the fasteners and the first corrugations under conditions such as squeezing or pulling. While achieving a good noise reduction effect, it can also improve the installation reliability of the connecting pipe on the door body, thereby reducing the risk of relative friction or resonance between the connecting pipe and the door body due to insecure fixing.

[0024] In some embodiments of this application, a refrigeration device is provided, the refrigeration device including a vent valve disposed in the door body, one end of the vent valve being connected to the air inlet, and the other end of the vent valve being connected to the connecting pipe, the vent valve being able to connect the air inlet and the connecting pipe.

[0025] Another technical solution described above has the following advantages or beneficial effects: By providing a vent valve between the air inlet and the connecting pipe, outside air can enter the refrigeration room through the vent valve, balancing the air pressure between the refrigeration room and the outside, thus facilitating the opening of the door. Furthermore, the vent valve can have open and closed states. When the vent valve is open, airflow from outside the refrigeration unit can enter the vent valve through the air inlet and then enter the refrigeration room through the connecting pipe, thereby balancing the air pressure difference between the refrigeration room and the outside of the refrigeration unit and avoiding difficulties in opening the door. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0027] Figure 1 This is a schematic diagram of a refrigeration device according to an embodiment of this application; Figure 2 for Figure 1 A cross-sectional view; Figure 3 for Figure 1 An exploded view; Figure 4 for Figure 3 A three-dimensional schematic diagram of the central connecting pipe; Figure 5 for Figure 3 A schematic diagram from another perspective; Figure 6 for Figure 5 A cross-sectional schematic diagram; Figure 7 for Figure 6 A magnified view of a portion of the image; Figure 8 for Figure 6 A cross-sectional view at the first ripple; Figure 9 for Figure 6 A cross-sectional view at the second ripple; Figure 10 for Figure 3 A schematic diagram of the central vent valve; Figure 11 for Figure 10 A cross-sectional view of the image.

[0028] The correspondence between the reference numerals and the component names is as follows: 1. Enclosure; 101. Refrigeration compartment; 2. Door body; 201. Air inlet; 202. Connecting port; 3. Connecting tube; 301. First groove; 302. Second groove; 310. First semicircular area; 320. Second semicircular area; 31. First ripple; 32. Second ripple; 33. Rippled section; 34. Smooth section; 4. Vent valve; 401. Valve cavity; 402. Connecting hole; 41. Valve seat; 42. Sleeve; 43. Resilient valve body; 431. Connecting part; 432. Resilient diaphragm; 5. Interface components. Detailed Implementation

[0029] This utility model provides a refrigeration device. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The refrigeration device in the embodiments of the present invention can be a freezer, refrigerator, or other refrigeration cabinet. The following uses a refrigerator as an example to describe in detail the improved technical solution of the refrigeration device in the embodiments of the invention.

[0033] Figure 1 This is a schematic diagram of a refrigeration device according to an embodiment of this application.

[0034] like Figure 1As shown, the refrigeration device provided in this embodiment of the present invention includes a housing 1. The housing 1 can adopt a hollow structure such as a cuboid. The housing 1 forms the outer shell of the refrigeration device. It should be noted that the housing 1 can also adopt a hollow shell structure of other shapes.

[0035] Figure 2 for Figure 1 A cross-sectional view.

[0036] like Figure 2 As shown, in some embodiments, the housing 1 includes a refrigeration compartment 101, which can serve as an independent storage space. The refrigeration compartment 101 may have an opening, allowing users to store food within it. Multiple refrigeration compartments 101 may be provided.

[0037] In some embodiments, multiple refrigeration chambers 101 may be provided, which may be freezers, refrigerators, and variable temperature chambers, etc., to meet different refrigeration needs such as freezing, refrigeration, and variable temperature according to different types of food, and to store items that need to be refrigerated or frozen. The multiple refrigeration chambers 101 may be arranged vertically or horizontally.

[0038] In some embodiments, the refrigeration device may include a cabinet liner (not shown in the figure). The refrigeration chamber 101 may be formed inside the cabinet liner, and a foamed space may be formed between the cabinet liner and the cabinet body 1. By filling the foamed space with foam material, the refrigeration chamber 101 can achieve a good heat preservation effect.

[0039] like Figure 1 and Figure 2 As shown, in some embodiments, the refrigeration device may include a door 2. The door 2 is movably mounted on the housing 1 and is used to open or close the refrigeration compartment 101.

[0040] Multiple doors 2 can be installed, and multiple doors 2 can be installed on multiple refrigeration compartments 101. The doors 2 can be installed on the cabinet 1 by means of rotation or sliding.

[0041] In some embodiments, the refrigeration system includes a refrigeration system (not shown in the figure). The refrigeration system may be located inside the cabinet 1. The refrigeration system is used to provide cold air to the inside of the refrigerator to maintain a low-temperature environment in each refrigeration compartment 101.

[0042] In some embodiments, the refrigeration system includes a compressor (not shown). The compressor is the power source for the refrigeration cycle, drawing in low-temperature, low-pressure refrigerant gas and compressing it into a high-temperature, high-pressure gas. The compressor can deliver the high-temperature, high-pressure refrigerant to the condenser.

[0043] In some embodiments, the refrigeration system includes a condenser (not shown). The condenser can be used to receive refrigerant flowing out of the compressor, cooling the high-temperature, high-pressure refrigerant gas from the compressor and converting it into a liquid state. The condenser can transfer heat from the refrigerant to the surrounding air, thereby lowering the temperature of the refrigerant.

[0044] In some embodiments, the refrigeration system includes a throttling device (not shown). The condenser can deliver the condensed refrigerant to the throttling device. The throttling device may be a capillary tube. The throttling device can be used to reduce the pressure of the refrigerant.

[0045] In some embodiments, the refrigeration system includes an evaporator (not shown). A throttling device can deliver a throttled and depressurized refrigerant into the evaporator. The evaporator can be used for the refrigerant vapor to evaporate and boil, thereby absorbing heat from the surrounding medium.

[0046] In some embodiments, the compressor, condenser, throttling device, and evaporator can be connected in sequence to form a refrigeration circuit. The refrigerant can circulate within the refrigeration circuit to achieve refrigeration of the interior of the housing 1.

[0047] Figure 3 for Figure 1 An exploded image.

[0048] like Figure 3 As shown, in some embodiments, the outer wall of the door 2 is provided with an air inlet 201, which communicates with the outside of the cooling chamber 101. The side of the door 2 facing the cooling chamber 101 is provided with a connecting port 202, which communicates with the cooling chamber 101. The air inlet 201 can communicate with the connecting port 202. When the refrigeration device is in operation, the air pressure inside the cooling chamber 101 decreases. The connection between the connecting ports 201 and 202 allows outside air to enter the cooling chamber 101 through the air inlet 201 and the connecting port 202, thereby balancing the air pressure between the cooling chamber 101 and the outside air pressure, facilitating the user's normal opening of the door 2.

[0049] Figure 4 for Figure 3 A three-dimensional schematic diagram of the central connecting pipe; Figure 5 for Figure 3 A schematic diagram from another perspective; Figure 6 Figure 5 A cross-sectional schematic diagram.

[0050] It should be noted that the connecting pipe is usually arranged in a curved manner inside the door. This is to facilitate demonstrating the actual structure of the connecting pipe. Figure 4 and Figure 5 The connecting pipe shown is in a straight pipe configuration.

[0051] like Figure 4, Figure 5 and Figure 6 As shown, in some embodiments, the refrigeration device includes a connecting pipe 3, which is disposed inside the door body 2. The connecting pipe 3 is distributed within the foaming space of the door body 2, and the connecting pipe 3 may have a cylindrical structure. One end of the connecting pipe 3 may be connected to the air inlet 201, and the other end of the connecting pipe 3 may be connected to the connecting port 202. The two ends of the connecting pipe 3 are respectively connected to the air inlet 201 and the connecting port 202 for connecting the air inlet 201 and the connecting port 202.

[0052] The wall of the connecting pipe 3 is provided with a first corrugation 31, the length of which can extend along the circumference of the connecting pipe 3. The first corrugation 31 protrudes outward from the wall of the connecting pipe 3 and forms a first groove 301 inside the connecting pipe 3, which communicates with the interior of the connecting pipe 3. The arc length of the first corrugation 31 along the circumference of the connecting pipe 3 is less than the circumference of the connecting pipe 3, that is, the first corrugation 31 only protrudes in a local area of ​​the pipe body of the connecting pipe 3, rather than circling the entire circle. Multiple first corrugations 31 can be provided, and multiple first corrugations 31 can be arranged at intervals along the axial direction of the connecting pipe 3.

[0053] The connecting pipe 3 has a second corrugation 32 on its wall, and the length of the second corrugation 32 can extend along the circumference of the connecting pipe 3. The second corrugation 32 protrudes outward from the wall of the connecting pipe 3 and forms a second groove 302 inside the connecting pipe 3, which communicates with the interior of the connecting pipe 3. The arc length of the second corrugation 32 along the circumference of the connecting pipe 3 is less than the circumference of the connecting pipe 3, that is, the second corrugation 32 only protrudes in a local area of ​​the connecting pipe 3, rather than circling the entire circumference. Multiple second corrugations 32 can be provided, and multiple second corrugations 32 can be arranged at intervals along the axial direction of the connecting pipe 3.

[0054] The first corrugation 31 and the second corrugation 32 are respectively arranged on opposite sides of the connecting pipe 3. For example, the first corrugation 31 and the second corrugation 32 are respectively arranged on the left and right sides of the connecting pipe 3, or the first corrugation 31 and the second corrugation 32 are respectively arranged on the upper and lower sides of the connecting pipe 3. Multiple first corrugations 31 and multiple second corrugations 32 are arranged alternately along the axial direction of the connecting pipe 3.

[0055] Specifically, in related technologies, a corrugated pipe is used as the connecting pipe 3. Multiple full-circle corrugations are spaced out on the corrugated pipe. However, under the negative pressure drive of the internal refrigeration unit, significant noise is generated as external gas flows through the corrugated pipe into the refrigeration unit. This noise intensifies with higher airflow velocities, negatively impacting the user experience. By ensuring that the arc lengths of the first corrugation 31 and the second corrugation 32 along the circumference of the connecting pipe 3 are both less than the circumference of the pipe body—meaning the first corrugation 31 and the second corrugation 32 only bulge in localized areas of the pipe body rather than circling completely—two independent local sound waves are formed within the connecting pipe 3. Furthermore, the first corrugation 31 and the second corrugation 32 are located on opposite sides of the connecting pipe 3 and arranged alternately along the axial direction. This allows the airflow to generate two sound waves with the same frequency but opposite phases as it passes through the first corrugation 31 and the second corrugation 32 on both sides. According to the principle of acoustic interference, the two opposing sound waves can cancel each other out, significantly reducing the noise generated by gas flow, especially improving the sharp noise problem at high flow velocities and optimizing the issue of high noise levels in the connecting pipe 3.

[0056] In related technologies, a smooth tube is used as the connecting pipe 3. However, since the connecting pipe 3 needs to be arranged within the foaming space of the door body 2, the smooth tube is prone to bending or flattening during the foaming process of the door body 2, thereby reducing the ventilation effect of the connecting pipe 3. In other technologies, a corrugated pipe is used as the connecting pipe 3. The corrugated pipe is easier to bend and can withstand greater radial pressure, and it can maintain its shape during the foaming process of the door body 2. However, under negative pressure, the gas flowing through the corrugated pipe will generate obvious noise, and the higher the airflow velocity, the sharper the noise, affecting the user experience.

[0057] The technical solution of this application sets the first corrugation 31 and the second corrugation 32 on opposite sides of the connecting pipe 3 and arranges them alternately along the axial direction. When the airflow passes through the connecting pipe 3, the local corrugations on both sides of the connecting pipe 3 generate vortices and fall off in their respective areas, which helps to form two beams of sound waves with opposite phases. This allows the two beams of sound waves to cancel each other out to a certain extent, which can greatly reduce the noise energy and significantly reduce the noise generated by the gas flowing in the connecting pipe 3. In particular, it can improve the problem of sharp noise at high flow rates and solve the problem of excessive noise when corrugated pipes are used in the venting components of refrigeration devices in related technologies.

[0058] On the other hand, since both the first corrugation 31 and the second corrugation 32 adopt a structure with the pipe wall protruding outward, the external structure of the connecting pipe 3 is similar to the corrugated external structure of the traditional corrugated pipe, which gives the connecting pipe 3 a certain elastic deformation capability. Moreover, the protruding structure of the first corrugation 31 and the second corrugation 32 can disperse radial pressure and adapt to the squeezing force generated on the pipe body by the door body 2 during the foaming process, avoiding the problem of squeezing during the foaming of the door body 2 or being flattened during use. The connecting pipe 3 of this application not only has the advantage of low noise, but also maintains the characteristic of easy bending of the connecting pipe 3 to avoid bending and flattening of the pipe body. The door body 2 can be opened and used smoothly during the refrigeration process, and will not cause noise that affects the user's user experience.

[0059] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0060] like Figure 7 As shown, in some embodiments, a plurality of first corrugations 31 can be arranged at equal intervals along the axial direction of the connecting pipe 3, that is, the first corrugations 31 can be arranged uniformly along the axial direction of the connecting pipe 3, and the spacing between any adjacent first corrugations 31 is equal.

[0061] Multiple second corrugations 32 can be arranged at equal intervals along the axial direction of the connecting pipe 3, that is, the second corrugations 32 can be arranged uniformly along the axial direction of the connecting pipe 3, and the spacing between any adjacent second corrugations 32 is equal.

[0062] According to the formula for vortex shedding frequency, the equal spacing between the first corrugations 31 ensures that the vortex shedding frequency generated when the airflow passes through each first corrugation 31 is the same, and the equal spacing between the second corrugations 32 ensures that the vortex shedding frequency generated when the airflow passes through each second corrugation 32 is the same. This avoids deviations in the vortex shedding frequency of some corrugations due to uneven spacing of the first corrugations 31 or the second corrugations 32, which would affect the interference effect. This is beneficial for the stable interference of sound waves generated along both sides of the connecting pipe 3 axis, thus reducing noise.

[0063] Furthermore, since multiple first corrugations 31 and multiple second corrugations 32 are arranged alternately along the axial direction of the connecting pipe 3, and the spacing between the first corrugations 31 and the spacing between the second corrugations 32 are equal, the misalignment distance between adjacent first corrugations 31 and second corrugations 32 is constant, which is conducive to the formation of a stable phase difference between the two sound waves at each position, thereby achieving a better interference and noise reduction effect.

[0064] In some embodiments, the distance between any two adjacent first corrugations 31 is equal to the distance between any two adjacent second corrugations 32, that is, the interval between the first corrugations 31 is equal to the interval between the second corrugations 32.

[0065] Specifically, the difference in spacing between the first corrugation 31 and the second corrugation 32 can easily lead to some vortex shedding frequencies not being able to cancel each other out. Furthermore, the first corrugation 31 and the second corrugation 32 are arranged alternately along the axial direction; if the spacing on both sides is unequal, unstable noise attenuation can easily occur. In this embodiment, by making the spacing between adjacent first corrugations 31 equal to the spacing between adjacent second corrugations 32, according to the formula for the frequency generated by vortex shedding in the corrugated pipe, it can be seen that the vortex shedding frequency generated by the airflow passing through the first corrugation 31 is the same as the vortex shedding frequency generated by the airflow passing through the second corrugation 32. This ensures that the sound waves on both sides can meet the condition of opposite phases at the same frequency during the airflow through the connecting pipe 3, thereby better eliminating the sharp noise of the gas flow.

[0066] like Figure 7 As shown, in some embodiments, the width of the first corrugation 31 along the axial direction of the connecting pipe 3 is d1, and the width of the second corrugation 32 along the axial direction of the connecting pipe 3 is d2, where d1 = d2. Correspondingly, the axial width of the first groove 301 formed by the first corrugation 31 inside the connecting pipe 3 is equal to the axial width of the second groove 302 formed by the second corrugation 32 inside the connecting pipe 3.

[0067] If the width of the first corrugation 31 along the axial direction of the connecting pipe 3 is not equal to the width of the second corrugation 32 along the axial direction of the connecting pipe 3, the sound wave energy generated by the first corrugation 31 and the sound wave energy generated by the second corrugation 32 will be different. Even if the two have the same frequency and opposite phase, the stronger sound wave may not be able to cancel each other out. By setting the width of the first corrugation 31 along the axial direction of the connecting pipe 3 to be the same as the width of the second corrugation 32 along the axial direction of the connecting pipe 3, the two beams of sound wave energy in the connecting pipe 3 are made equal. At the same time, when the spacing of the first corrugation 31 and the spacing of the second corrugation 32 are equal, the alternating first and second corrugations 32 can form uniformly alternating sound waves along the axial direction of the connecting pipe 3, which can significantly improve the uniformity of noise cancellation effect along the axial direction of the connecting pipe 3.

[0068] like Figure 7 As shown, in some embodiments, the spacing between any two adjacent first corrugations 31 is D1, and the axial distance between the second corrugation 32 located at the interval between any two adjacent first corrugations 31 and one of the first corrugations 31 is D2. The ratio of D2 to D1 can be in the range of 0.4 to 0.6.

[0069] By controlling the ratio of D2 to D1 within the range of 0.4 to 0.6, the vortex shedding generated by the first corrugation 31 and the vortex shedding generated by the second corrugation 32, even with opposite phase differences, can still remain within their strong damping range. This allows high-frequency sharp noise to be effectively reduced, thus improving the problem of sharp noise that is prone to occur in bellows.

[0070] In some embodiments, the first corrugation 31 is positioned opposite to the middle position of two adjacent second corrugations 32, that is, the ratio of D2 to D1 is 0.5.

[0071] Specifically, by setting the first corrugation 31 on one side of the middle position of the two second corrugations 32, the wave generated by the vortex shedding on one side lags behind the wave on the other side and has a phase difference of 180°. At the same time, since the interval between any two first corrugations 31 is equal to the interval between any two second corrugations 32, the vortex shedding frequency generated when the airflow passes through is the same. In this way, the two beams of sound waves with the same frequency and opposite phase can interfere with each other, effectively canceling the noise energy, thereby achieving efficient reduction of the airflow noise in the connecting pipe 3.

[0072] Figure 8 for Figure 6 A cross-sectional view at the first ripple.

[0073] In some embodiments, the arc length of the first corrugation 31 distributed along the circumference of the connecting pipe 3 is L1, and the circumference of any section of the connecting pipe 3 in the direction perpendicular to its axial direction is L2. The ratio of L1 to L2 can be ≥1 / 3.

[0074] It should be noted that, since the first corrugation 31 protrudes outward from the wall of the connecting pipe 3, the arc surface of the outer edge of the first corrugation 31 is not on the same arc surface as the wall of the connecting pipe 3. Here, the arc length of the first corrugation 31 distributed around the circumference of the connecting pipe 3 is L1, which is the connection point of the first corrugation 31 on the wall of the connecting pipe, i.e., the inner edge of the first corrugation. In other words, the length of the first corrugation 31 distributed around the circumference of the connecting pipe 3 is L1.

[0075] If the ratio of L1 to L2 is less than 1 / 3, meaning the arc length of the first corrugation 31 distributed circumferentially along the connecting pipe 3 is too small, the surface of the connecting pipe 3 will approach a smooth pipe body. This results in insufficient support from the first corrugation 31 on the connecting pipe 3, making it difficult for the connecting pipe 3 to maintain good bending performance. This affects the radial compressive strength of the connecting pipe 3, increasing the risk of pipe bending or flattening during the foaming process of the door body 2, thereby reducing the ventilation effect of the connecting pipe 3. By setting L1 ≥ 1 / 3 L2, good radial compressive strength of the connecting pipe 3 can be maintained, allowing the connecting pipe 3 to better adapt to the extrusion force generated by the door body 2 during the foaming process, avoiding the problems of compression during foaming or flattening during use.

[0076] In some embodiments, the ratio of L1 to L2 can be ≤3 / 5.

[0077] If the ratio of L1 to L2 is greater than 3 / 5, meaning the arc length of the first corrugation 31 distributed circumferentially along the connecting pipe 3 is too long, the surface of the connecting pipe 3 approaches a corrugated pipe with full circumference corrugations. This easily leads to partial overlap of the vortex regions of the corrugations on both sides, and mutual interference of airflow disturbances, which is not conducive to the attenuation of sound waves on both sides. By setting L1≤3 / 5L2, the problem of excessive overlap of sound waves generated by the first corrugation 31 and the second corrugation 32, resulting in mutual interference of airflow disturbances, can be effectively improved. This is conducive to the mutual interference of two sound waves with opposite phases, canceling out the noise energy in the connecting pipe 3.

[0078] In some embodiments, the ratio of L1 to L2 can range from 1 / 3 to 3 / 5. By controlling the ratio of L1 to L2 within this range, not only can the good radial compressive strength of the connecting pipe 3 be maintained, allowing it to better adapt to the compressive force exerted on the pipe body by the door body 2 during the foaming process, thus avoiding the problems of compression during foaming or flattening during use, but it also effectively mitigates the problem of excessive overlap of sound waves generated by the first corrugation 31 and the second corrugation 32, which could lead to mutual interference of airflow disturbances. This facilitates the mutual interference of two sound waves with opposite phases, canceling out the noise energy within the connecting pipe 3.

[0079] Figure 9 for Figure 6 A cross-sectional view at the second ripple.

[0080] In some embodiments, the arc length of the second corrugation 32 distributed along the circumference of the connecting pipe 3 is L3, and the circumference of any section of the connecting pipe 3 in the direction perpendicular to its axial direction is L2. The ratio of L3 to L2 can be ≥1 / 3.

[0081] It should be noted that, since the second corrugation 32 protrudes outward from the wall of the connecting pipe 3, the arc surface of the outer edge of the second corrugation 32 is not on the same arc surface as the wall of the connecting pipe 3. Here, the arc length of the second corrugation 32 distributed around the circumference of the connecting pipe 3 is L1, which is the connection point of the second corrugation 32 on the wall of the connecting pipe 3, i.e., the inner edge of the second corrugation 32. In other words, the length of the second corrugation 32 distributed around the circumference of the connecting pipe 3 is L1.

[0082] If the ratio of L3 to L2 is less than 1 / 3, meaning the arc length of the second corrugation 32 distributed circumferentially along the connecting pipe 3 is too small, the surface of the connecting pipe 3 will approach a smooth pipe body. This results in insufficient support from the second corrugation 32 on the connecting pipe 3, making it difficult for the connecting pipe 3 to maintain good bending performance. This affects the radial compressive strength of the connecting pipe 3, increasing the risk of pipe bending or flattening during the foaming process of the door body 2, thereby reducing the ventilation effect of the connecting pipe 3. By setting L3 ≥ 1 / 3 L2, good radial compressive strength of the connecting pipe 3 can be maintained, allowing the connecting pipe 3 to better adapt to the extrusion force generated by the door body 2 during the foaming process, avoiding the problems of compression during foaming or flattening during use.

[0083] In some embodiments, the ratio of L3 to L2 can be ≤3 / 5.

[0084] If the ratio of L3 to L2 is greater than 3 / 5, meaning the arc length of the second corrugation 32 distributed circumferentially along the connecting pipe 3 is too long, the surface of the connecting pipe 3 will approach a corrugated pipe with full circumference corrugations. This can easily lead to partial overlap of the vortex regions of the corrugations on both sides, and mutual interference of airflow disturbances, which is not conducive to the attenuation of sound waves on both sides. By setting L1≤3 / 5L2, the problem of excessive overlap of sound waves generated by the first corrugation 31 and the second corrugation 32, resulting in mutual interference of airflow disturbances, can be effectively improved. This is conducive to the mutual interference of two sound waves with opposite phases, thus canceling out the noise energy in the connecting pipe 3.

[0085] In some embodiments, the ratio of L3 to L2 can range from 1 / 3 to 3 / 5. By controlling the ratio of L3 to L2 within this range, not only can the good radial compressive strength of the connecting pipe 3 be maintained, allowing it to better adapt to the compressive force exerted on the pipe body by the door body 2 during foaming, thus avoiding the problems of compression during foaming or flattening during use, but it also effectively mitigates the problem of excessive overlap of sound waves generated by the first corrugation 31 and the second corrugation 32, which could lead to mutual interference of airflow disturbances. This facilitates the mutual interference of two sound waves with opposite phases, canceling out the noise energy within the connecting pipe 3.

[0086] like Figure 8 and Figure 9As shown, in some embodiments, the wall of the connecting pipe 3 includes a first semicircular region 310 and a second semicircular region 320. The first semicircular region 310 and the second semicircular region 320 are distributed on opposite sides of the connecting pipe 3. For example, the first semicircular region 310 and the second semicircular region 320 can be distributed on the upper and lower opposite sides of the connecting pipe 3, or on the left and right opposite sides of the connecting pipe 3. In this way, the first semicircular region 310 and the second semicircular region 320 each occupy 1 / 2 of the circumference of the connecting pipe 3, that is, the unfolded surface of the first semicircular region 310 and the second semicircular region 320 is the unfolded surface of the entire connecting pipe 3.

[0087] The first corrugation 31 is semi-circular, that is, the arc length of the first corrugation 31 distributed along the circumference of the connecting pipe 3 is 1 / 2 of the circumference of any section of the connecting pipe 3 perpendicular to its axial direction. The first corrugation 31 is distributed in the first semi-circular area 310.

[0088] The second corrugation 32 is semi-circular, that is, the arc length of the second corrugation distributed along the circumference of the connecting pipe 3 is 1 / 2 of the circumference of any section of the connecting pipe 3 perpendicular to its axial direction. The second corrugation 32 is distributed in the second semi-circular area 320.

[0089] Specifically, the first corrugation 31 and the second corrugation 32 are both semicircular and distributed on opposite semicircular regions. The first semicircular region 310 and the second semicircular region 320 each occupy 1 / 2 of the circumference of the connecting pipe 3, which is beneficial for the wave crests to completely cover the wave troughs when the two sound waves interfere, and has a more significant effect on reducing the sharp noise generated by the high-velocity gas passing through the connecting pipe 3. Moreover, the semicircular first corrugation 31 is evenly distributed in the first semicircular region 310 along the axial direction of the connecting pipe 3, and the semicircular second corrugation is evenly distributed in the second semicircular region 320 along the axial direction of the connecting pipe 3. The interval between any two adjacent first corrugations 31 is equal to the interval between any two adjacent second corrugations 32, so that the sound waves generated on both sides can maintain a 180° phase difference, so as to avoid local phase shift and achieve comprehensive noise reduction along the axial length of the transmission pipe.

[0090] like Figure 4 and Figure 5 As shown, in some embodiments, the connecting pipe 3 includes a corrugated section 33, with a first corrugation 31 and a second corrugation 32 respectively disposed on opposite sides of the corrugated section 33. The corrugated section 33 may have multiple ends, and the multi-ended corrugated sections 33 may be spaced apart along the axial direction of the connecting pipe 3.

[0091] In this method, by arranging multiple corrugated segments 33 at intervals along the axial direction of the connecting pipe 3, multiple segments can be formed along the entire pipe section of the connecting pipe 3 in the axial direction. This allows the interference between two beams of sound waves with the same frequency and opposite phase to cancel out the noise energy and suppress the airflow noise of the connecting pipe 3.

[0092] Furthermore, the connecting pipe 3 can be fixed to the door body 2 at the interval between the two corrugated sections 33, which can avoid the fixed structure affecting the noise reduction structure at the corrugated section 33.

[0093] In some other embodiments, the first corrugation 31 and the second corrugation 32 may be alternately distributed along the axial direction of the connecting pipe 3, and may be continuously distributed along the entire length of the connecting pipe 3.

[0094] like Figure 4 and Figure 5 As shown, in some embodiments, the connecting pipe 3 may include a smooth section 34. The smooth section 34 refers to a section of the connecting pipe 3 whose surface does not have the first corrugation 31 and the second corrugation 32. It should be noted that the smooth section 34 may refer to a section with other shapes, which is not limited in this application. The smooth section 34 may be provided at the interval between two corrugated sections 33, and the smooth section 34 is used for fixed connection with the interior of the door body 2.

[0095] To improve the reliability of the connection between the connecting pipe 3 and the door body 2, a connection structure can be added, such as a buckle, a fixing ring, or other fixing structures, to fix the connecting pipe 3 inside the door body 2. If it is fixed directly at the corrugated section 33, it is easy to cause deformation of the corrugated section 33, such as reduced spacing or distorted shape, resulting in an insignificant noise reduction effect.

[0096] Among them, by setting a smooth section 34 at the interval between the two corrugated sections 33, the smooth section 34 can be directly fixed to the door body 2 by fasteners such as buckles (not shown in the figure), thereby avoiding direct contact between the fasteners and the corrugated sections 33. This keeps the spacing between the first corrugation 31 and the second corrugation 32, the misalignment distance between them, and other structures within a reasonable range, preventing deformation due to the interaction force between the fasteners and the pipes caused by squeezing, pulling, etc. While achieving a good noise reduction effect, it can also improve the installation reliability of the connecting pipe 3 on the door body 2, thereby reducing the risk of relative friction or resonance between the connecting pipe and the door body 2 due to the pipe not being firmly fixed.

[0097] Figure 10 for Figure 3 A schematic diagram of the central vent valve; Figure 11 for Figure 10 A cross-sectional view of the image.

[0098] like Figure 10 and Figure 11 As shown, in some embodiments, the refrigeration device may include a vent valve 4, which is disposed on the door 2. The vent valve 4 is used to balance the pressure difference between the refrigeration chamber 101 and the outside of the cabinet 1, so that the door 2 can be opened more smoothly.

[0099] A vent valve 4 is located inside the door 2. One end of the vent valve 4 is connected to the air inlet 201, and the other end is connected to the connecting pipe 3. The vent valve 4 connects the air inlet 201 and the connecting pipe 3. By providing a vent valve 4 between the air inlet 201 and the connecting pipe 3, outside air can enter the refrigeration chamber 101, thereby balancing the air pressure between the refrigeration chamber 101 and the outside air pressure, thus facilitating the opening of the door 2.

[0100] Specifically, the vent valve 4 can have open and closed states. When the vent valve 4 is open, airflow from outside the refrigeration unit can enter the vent valve 4 through the air inlet 201, and then enter the refrigeration compartment 101 through the connecting pipe 3, thereby balancing the air pressure difference between the refrigeration compartment 101 and the outside of the refrigeration unit and avoiding the problem of difficulty in opening the door. When the vent valve 4 is closed, it can block the entry of hot and humid air from outside into the refrigeration compartment 101, which helps to reduce evaporator frost and avoid the problem of increased fan noise and decreased refrigeration efficiency caused by excessive frost.

[0101] In some embodiments, the refrigeration device may further include an interface component 5, which is located at the communication port 202, and the communication pipe 3 is connected to the communication port 202 through the interface component 5.

[0102] like Figure 11 As shown, in some embodiments, the vent valve 4 includes a valve seat 41, which is disposed on the door body 2. The valve seat 41 may be located within the foaming space inside the door body 2 and may be used to provide an installation structure for other components of the vent valve 4. The valve seat 41 may have a valve cavity 401 inside, which is connected to the refrigeration chamber 101 through a connecting pipe 3.

[0103] The vent valve 4 includes a sleeve 42, which can be disposed inside the valve cavity 401. The sleeve 42 can be nested on the inner surface of the valve cavity 401 of the valve seat 41. The sleeve 42 is provided with a connecting hole 402, which can be a channel with a certain length. The connecting hole 402 is a channel for outside air to enter the refrigeration chamber 101 or for air from the refrigeration chamber 101 to be discharged outward. It can be used to connect the valve cavity 401 with the outside of the cabinet 1.

[0104] The vent valve 4 includes an elastic valve body 43, which can be disposed within the valve cavity 401. The elastic valve body 43 is configured as an elastic element and can undergo elastic deformation under stress. The elastic valve body 43 elastically abuts against the inner end face of the sleeve 42 to close the communication hole 402. When the elastic valve body 43 elastically abuts against the inner end face of the sleeve 42, it can cover the communication hole 402, thereby disconnecting the communication between the valve cavity 401 and the outside of the housing 1, preventing outside air from entering the refrigeration compartment 101 through the communication hole 402 and the valve cavity 401.

[0105] The inner end face of the sleeve 42 can serve as the contact surface of the elastic valve body 43, meaning that the peripheral edge of the elastic valve body 43 can abut against the outer peripheral edge of the connecting hole 402. This allows the elastic valve body 43 to fully contact the inner end face when closing the connecting hole 402, reducing the problem of gaps caused by uneven contact surfaces compared to the elastic valve body 43 abutting against the inner wall of the valve cavity 401.

[0106] When the door 2 is opened, if the pressure difference between the outside of the cabinet 1 and the inside of the refrigeration chamber 101 is greater than a preset value, the air in the connecting hole 402 can push open the elastic valve body 43 to open the connecting hole 402.

[0107] Specifically, when the cooling chamber 101 experiences negative pressure due to refrigeration, and the external pressure is greater than the pressure inside the cooling chamber 101, and the difference exceeds a preset value, the pressure exerted by the outside air through the connecting hole 402 on the elastic valve body 43 can open the elastic valve body 43, allowing outside air to enter the cooling chamber 101 and quickly balance the internal and external air pressures. This effectively reduces the force required to open the door 2, allowing the user to open the door 2 without effort, making opening the door smoother. When the pressure difference between the inside and outside of the cabinet 1 is not greater than the preset value, the elastic valve body 43 can remain closed to the connecting hole 402. Outside air cannot directly enter the valve chamber 401 through the connecting hole 402 and further enter the cooling chamber 101. This reduces the amount of hot and humid outside air entering, thereby reducing the probability of frost formation inside the cabinet. It also effectively reduces the flow of air into the vent valve 4 and then through the connecting pipe 3, thus reducing the noise caused by airflow through the connecting pipe 3.

[0108] like Figure 11 As shown, in some embodiments, the resilient valve body 43 may include a connecting portion 431 and an elastic diaphragm 432. The connecting portion 431 is disposed within the valve cavity 401 and connected to the inner wall of the valve seat 41, with one end of the connecting portion 431 located near the sleeve 42. The elastic diaphragm 432 is disposed at the end of the connecting portion 431 near the sleeve 42, and the peripheral edge of the elastic diaphragm 432 elastically abuts against the inner end face of the sleeve 42.

[0109] The shape of the elastic diaphragm 432 can be adapted to the shape of the inner end face of the sleeve 42. For example, the inner end face of the sleeve 42 can be circular, and the elastic diaphragm 432 can be correspondingly set to a circular shape. The elastic diaphragm 432 has deformable elasticity, and the preset value can be changed by designing and selecting the material, thickness, etc. of the elastic diaphragm 432. Moreover, the peripheral edge of the elastic diaphragm 432 elastically abuts against the inner end face of the sleeve 42, and the elastic diaphragm 432 and the inner end face of the sleeve 42 can form a continuous and tight sealing surface, which can further prevent air outside the cabinet 1 from entering the refrigeration chamber 101 when the pressure difference does not reach the preset value.

[0110] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of this application is limited only by the appended claims.

Claims

1. A refrigeration device, characterized in that, include: A housing, which forms the outer shell of the refrigeration device, and a refrigeration compartment is provided inside the housing; The door is movably mounted on the housing and is used to open or close the refrigeration compartment; the outer wall of the door is provided with an air inlet, and the side of the door facing the refrigeration compartment is provided with a connecting port, which communicates with the refrigeration compartment; A connecting pipe is provided inside the door body. One end of the connecting pipe is connected to the air inlet, and the other end of the connecting pipe is connected to the connecting port. The connecting pipe is used to connect the air inlet and the connecting port. The connecting pipe has a first corrugation on its wall. The first corrugation protrudes outward from the wall of the connecting pipe and forms a first groove inside the connecting pipe. The arc length of the first corrugation along the circumference of the connecting pipe is less than the circumference of the connecting pipe. Multiple first corrugations are provided and are arranged at intervals along the axial direction of the connecting pipe. The wall of the connecting pipe is provided with a second corrugation, which protrudes outward from the wall of the connecting pipe and forms a second groove inside the connecting pipe. The arc length of the second corrugation along the circumference of the connecting pipe is less than the circumference of the connecting pipe. Multiple second corrugations are provided and are arranged at intervals along the axial direction of the connecting pipe. The first corrugation and the second corrugation are respectively disposed on opposite sides of the connecting pipe, and multiple first corrugations and multiple second corrugations are arranged alternately along the axial direction of the connecting pipe.

2. The refrigeration device according to claim 1, characterized in that, Multiple first corrugations are arranged at equal intervals along the axial direction of the connecting pipe; Multiple second corrugations are arranged at equal intervals along the axial direction of the connecting pipe.

3. The refrigeration device according to claim 2, characterized in that, The distance between any two adjacent first corrugations is equal to the distance between any two adjacent second corrugations.

4. The refrigeration device according to claim 2, characterized in that, The first ripple is positioned opposite to the middle position of two adjacent second ripples.

5. The refrigeration device according to claim 2, characterized in that, The arc length of the first corrugation distributed along the circumference of the connecting pipe is L1, and the circumference of any section of the connecting pipe perpendicular to its axial direction is L2. The ratio of L1 to L2 is in the range of 1 / 3 to 3 / 5.

6. The refrigeration device according to claim 2, characterized in that, The arc length of the second corrugation distributed along the circumference of the connecting pipe is L3, the circumference of any section of the connecting pipe perpendicular to its axial direction is L2, and the ratio of L3 to L2 is in the range of 1 / 3 to 3 / 5.

7. The refrigeration device according to claim 2, characterized in that, The wall of the connecting pipe includes a first semicircular region and a second semicircular region, which are distributed on opposite sides of the connecting pipe. The first ripple is semi-circular, and the first ripple is distributed in the first semi-circular area; The second ripple is semi-circular and is distributed in the second semi-circular area.

8. The refrigeration device according to claim 1, characterized in that, The connecting pipe includes a corrugated section, with the first corrugation and the second corrugation respectively disposed on opposite sides of the corrugated section. The corrugated section has multiple ends, which are spaced apart along the axial direction of the connecting pipe.

9. The refrigeration device according to claim 8, characterized in that, The connecting pipe also includes a smooth section, which is located at the interval between the two corrugated sections and is used for fixed connection with the interior of the door body.

10. The refrigeration device according to claim 1, characterized in that, The refrigeration device includes a vent valve located inside the door body. One end of the vent valve is connected to the air inlet, and the other end is connected to the connecting pipe. The vent valve can connect the air inlet and the connecting pipe.

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