Radio altimeter packaging heat dissipation device

Abstract

The invention discloses a radio altimeter packaging heat dissipation device in the technical field of radio altimeters, and the device comprises a housing and a heat conduction plate disposed in the housing, the heat conduction plate is used for providing installation support for components of a radio altimeter, and the heat conduction plate is attached to the inner wall of the housing. A working cavity and two heat exchange cavities are formed in the shell; through cooperation of an auxiliary closing block, a pull rod, a fourth spring, a sponge layer and a connecting piece, dehumidification of a dehumidification piece cannot be exposed all the time to be conducted under the condition that the dehumidification piece communicates with external humid air, and closing is conducted after air in a heat exchange cavity is cooled and external air enters the heat exchange cavity; therefore, the dehumidification work of the dehumidification piece can be normally carried out when the dehumidification piece is used in humid special weather, dust can be prevented, it is ensured that low-temperature gas injected into the working cavity is dry but not humid, and then damage to internal components is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of radio altimeters, in particular to a packaged heat dissipation device for a radio altimeter. Background Art

[0002] An altimeter is an instrument that measures and indicates the vertical distance between an aircraft and a selected horizontal reference plane. It is divided into barometric altimeters and radio altimeters. The radio altimeter is an airborne radio device used to measure the vertical distance between the aircraft and the ground. It is one of the important aircraft instruments.

[0003] The working components of the radio altimeter are encapsulated inside the shell. After working for a long time, heat will be generated between multiple components, and this heat will accumulate in the air inside the shell. The existing heat dissipation method generally dissipates heat by heat conduction between the heat conducting plate and the components. It can dissipate heat between the components and the heat conducting plate, but the efficiency is low. Due to its special nature, the radio altimeter generally does not dissipate heat through fan blades. Therefore, the heat accumulated in the air inside the shell cannot be quickly dissipated and exchanged by heat conduction through the heat conducting plate.

[0004] Based on this, the present invention designs a radio altimeter packaging heat dissipation device to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a radio altimeter package heat dissipation device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a radio altimeter package heat dissipation device, comprising a housing and a heat conducting plate disposed within the housing, the heat conducting plate being used to provide mounting support for components of the radio altimeter, the heat conducting plate being in contact with the inner wall of the housing, the housing defining a working chamber and two heat exchange chambers, both heat exchange chambers being provided with notches communicating with the outside world, the two heat conducting plates being disposed within the working chamber, and heat exchange groups being disposed on both left and right sides of the working chamber;

[0007] The heat exchange group includes piston plates that are respectively slidably connected to the inside of the two heat exchange chambers and two groups of air holes. The two piston plates can move simultaneously in the left and right directions inside the heat exchange chamber. The two groups of air holes are respectively located on the left and right sides of the working chamber and are respectively connected to the two heat exchange chambers. A sealing sheet is provided on the side of the two groups of air holes away from the heat exchange chamber. A through hole is provided on the two piston plates. A stopper is provided on one side of the two through holes. The stoppers are respectively slidably connected to the two piston plates in the front-to-back direction. A first spring is fixedly connected between the two stoppers and the inner walls of the two piston plates. The side walls of the stoppers are wedge-shaped. Transition surfaces are provided at positions corresponding to the inner wall of the heat exchange chamber and the stoppers.

[0008] A driving group is provided between the two heat exchange groups, and is used to drive the two piston plates to move simultaneously and to release and reset the sealing of the pores by the two sealing sheets before and after the piston plates move.

[0009] As a further solution of the present invention, the drive group includes a reciprocating screw, a motor arranged on both sides of the reciprocating screw, two second springs and a driving rod, the output shafts of the two motors are fixedly connected to the reciprocating screw, the two motors are fixedly connected to the left and right sides of the inner wall of the working chamber, the driving rod is fixedly connected between the two piston plates and can slide left and right between the working chamber and the two heat exchange chambers, and the driving rod is fixedly connected to two push rods, both of which are located inside the working chamber, and the reciprocating screw is threadedly connected with a connecting piece, which is slidably connected to the inner wall of the working chamber and can respectively push the two push rods to move, the two second springs are respectively fixedly connected to the two heat conducting plates, and the two heat conducting plates are slidably connected to the working chamber in the front and rear directions, and both ends of the heat conducting plate are provided with a contact part, and when the two push rods contact the left and right ends of the heat conducting plate, they can push the heat conducting plate to slide along the working chamber, and the two sealing plates are respectively fixedly connected to the left and right ends of the heat conducting plate.

[0010] As a further solution of the present invention, dehumidification sheets are provided inside the two heat exchange chambers.

[0011] As a further solution of the present invention, one side of each of the two piston plates is provided with an auxiliary group for assisting the dehumidification blades in working;

[0012] The auxiliary group includes an auxiliary closing block, which is slidingly connected to the piston plate in the front and rear directions respectively, and a third spring is fixedly connected between the auxiliary closing block and the inner wall of the piston plate. One of the auxiliary closing blocks is provided with a conical head, and the conical head is fixedly connected to a pull rod. The two ends of the pull rod are slidingly connected to the inside of the working chamber and the heat exchange chamber respectively, and a fourth spring is fixedly connected between the pull rod and the inner wall of the working chamber, and the pull rod can be pushed by the connecting piece.

[0013] As a further solution of the present invention, the dehumidification sheet is a frame with a hollow interior and air holes on the side walls and is bonded to the inner wall of the heat exchange cavity. The dehumidification sheet is provided with moisture-proof and dehumidifying materials.

[0014] As a further solution of the present invention, a sponge layer is glued inside the through holes.

[0015] As a further solution of the present invention, the side wall of the heat conducting plate and the inner wall of the working cavity in contact with the side wall of the heat conducting plate are both wavy.

[0016] As a further solution of the present invention, each group of pores may be one or more.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the cooperation of the auxiliary closing block, the pull rod, the fourth spring, the sponge layer and the connecting parts, the dehumidification of the dehumidification sheet will not be exposed to the outside humid air all the time for dehumidification. Instead, it will be sealed after the air inside the heat exchange chamber is cooled down and the outside air enters, thereby improving the normal dehumidification work of the dehumidification sheet when used in special humid weather, and can prevent dust, ensuring that the low-temperature gas injected into the working chamber is dry rather than wet, thereby avoiding damage to internal components.

[0019] 2. In the present invention, during the reciprocating movement of the left and right piston plates on the left and right sides, the low-temperature gas inside the heat exchange chamber can be injected into the high-temperature gas inside the working chamber multiple times, and the high-temperature gas inside the working chamber can be discharged into the heat exchange chamber on the other side to reduce the heat accumulation of the air inside the working chamber, thereby completing the heat dissipation. Moreover, this process is a multiple process, thereby ensuring that the use of the radio altimeter will not be affected by the high temperature generated.

[0020] 3. Because the air holes are opened during the movement of the piston plate, the piston plate will allow low-temperature gas to flow in and out of the working chamber. At this time, the heat conduction plate is not in contact with the inner wall of the shell but has a certain distance from it, as shown in the figure. Then, when the air holes inject low-temperature gas into the working chamber, the gas will blow through the middle of the heat conduction plate and the shell. It can cool down the working chamber while blowing air to cool down the high-temperature surfaces inside the heat conduction plate and the shell. In addition, the side walls of the shell and the heat conduction plate are wavy, which can increase the flow time of low-temperature air and improve the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation station of the housing of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 Schematic diagram of the internal structure of the housing of the present invention;

[0024] Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle;

[0025] Figure 5 Schematic diagram of the positional relationship between the driving rod, the pulling rod and the connecting piece of the present invention;

[0026] Figure 6Schematic diagram of the positional relationship between the driving rod, two piston plates and two pull rods of the present invention;

[0027] Figure 7 Schematic diagram of the positional relationship between the piston plate and the heat exchange chamber, and between the heat conduction plate and the working chamber of the present invention;

[0028] Figure 8 Schematic diagram of the positional relationship between the heat conducting plate and the sealing sheet of the present invention;

[0029] Figure 9 Schematic diagram of the positional relationship between the pull rod, the piston plate and the auxiliary closing block of the present invention;

[0030] Figure 10 Schematic diagram of the positional relationship between the sponge layer and the through hole of the present invention;

[0031] Figure 11 is a schematic diagram of a dehumidification sheet of the present invention;

[0032] Figure 12 Schematic diagram of the shape of the heat conducting plate and the inner wall of the shell of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1. Shell; 2. Heat conduction plate; 3. Working chamber; 4. Heat exchange chamber; 5. Piston plate; 6. Air hole; 7. Sealing plate; 8. Through hole; 9. Stopper; 10. First spring; 11. Transition surface; 12. Reciprocating screw; 13. Motor; 14. Drive rod; 15. Push rod; 16. Connecting piece; 17. Second spring; 18. Contact part; 19. Dehumidification sheet; 20. Auxiliary closing block; 21. Third spring; 22. Conical head; 23. Pull rod; 24. Fourth spring; 25. Sponge layer; 26. Chamber; 27. Aircraft body. DETAILED DESCRIPTION

[0035] See also Figure 1-12 The present invention provides a technical solution: a radio altimeter package heat dissipation device, comprising a housing 1 and a heat conducting plate 2 disposed inside the housing 1, the heat conducting plate 2 being used to provide mounting support for components of the radio altimeter, the heat conducting plate 2 being in contact with the inner wall of the housing 1, the housing 1 being provided with a working chamber 3 and two heat exchange chambers 4, both of which are provided with notches communicating with the outside world, the two heat conducting plates 2 being disposed inside the working chamber 3, and heat exchange groups being disposed on both the left and right sides of the working chamber 3;

[0036] The heat exchange group includes a piston plate 5 and two groups of air holes 6 respectively connected to the inside of the two heat exchange chambers 4 in a sliding manner. The two piston plates 5 can move simultaneously in the left and right directions inside the heat exchange chamber 4. The two groups of air holes 6 are respectively located on the left and right sides of the working chamber 3 and are respectively connected to the two heat exchange chambers 4. A sealing plate 7 is provided on the side of the two groups of air holes 6 away from the heat exchange chamber 4. A through hole 8 is provided on the two piston plates 5. A stopper 9 is provided on one side of the two through holes 8. The stopper 9 is respectively connected to the two piston plates 5 in a front-to-back direction. A first spring 10 is fixedly connected between the two stoppers 9 and the inner walls of the two piston plates 5. The side walls of the stoppers 9 are wedge-shaped, and a transition surface 11 is provided at the position corresponding to the inner wall of the heat exchange chamber 4 and the stopper 9.

[0037] A driving group is provided between the two heat exchange groups, and is used to drive the two piston plates 5 to move simultaneously and to release and reset the sealing of the air holes 6 by the two sealing sheets 7 before and after the piston plates 5 move.

[0038] like Figure 1-Figure 7 As shown:

[0039] The shell 1 is placed inside the chamber 26 provided on the aircraft body 27 and connected to the aircraft body 27 by bolts. The chamber 26 is larger than the shell 1, allowing the gas inside the chamber 26 to enter the heat exchange chamber 4 through the gap to dissipate heat for the shell 1. The aircraft body 27 can optionally provide an air flow channel for connecting the interior of the chamber 26 with the outside world.

[0040] The components of the radio height variable are connected to the heat conducting plate 2, which is in contact with the inner wall of the shell 1. Both the heat conducting plate 2 and the shell 1 can be made of materials with good thermal conductivity. The heat generated by the components will be transferred to the shell 1 through the heat conducting plate 2 and then dissipated through the shell 1. Adding a heat dissipation group can achieve better heat dissipation effect.

[0041] The working process of the heat dissipation group is as follows:

[0042] The heat generated by the components will accumulate inside the shell 1, and the temperature of the air inside the shell 1 will rise. Therefore, the drive group needs to be turned on during use. Before the drive group works, the piston plates 5 inside the two heat exchange chambers 4 are Figure 7 For example, both piston plates 5 are located on the right side of the heat exchange chamber 4, and both sealing plates 7 seal the air holes 6, so that the high-temperature gas inside the working chamber 3 stays inside the working chamber 3. When the drive group is working, it will drive the two piston plates 5 to move from the right to the left at the same time.

[0043] The process when the piston plate 5 on the right moves to the left:

[0044] Before the right piston plate 5 moves, the sealing piece 7 on the right closes the air hole 6, and at this time the stopper 9 is located on the right side of the transition surface 11. At this time, the through hole 8 on the right is in a state of not being closed by the stopper 9, so the heat exchange chamber 4 on the right is connected with the outside air at this time, so it is low temperature relative to the high temperature gas inside the working chamber 3. When the driving group drives the piston plate 5 to move to the left, the driving group will release the sealing piece 7 from blocking the air hole 6, and the aperture of the air hole 6 is small, and when the piston plate 5 moves to the left, the side wall of the stopper 9 will contact the transition surface 11. At this time, the transition surface 11 will push the stopper 9 to follow the piston plate 5 to move to the left. During the process, the piston plate 5 gradually slides along the piston plate 5 and compresses the first spring 10. At this time, the stopper 9 will move toward the through hole 8 and gradually close the through hole 8. In the process of the movement of the piston plate 5, the inner wall of the heat exchange chamber 4 can continue to squeeze the stopper 9 so that the stopper 9 cannot release the seal of the through hole 8. At this time, when the piston plate 5 slides inside the heat exchange chamber 4, it will compress the air inside the heat exchange chamber 4, so that the low-temperature gas is blown into the interior of the working chamber 3 through the air hole 6, thereby cooling the interior of the working chamber 3 to achieve heat dissipation for the components. After the piston plate 5 moves to the leftmost side of the heat exchange chamber 4, the low-temperature gas can no longer be injected.

[0045] The process of the piston plate 5 on the left moving to the left (synchronized with the piston plate 5 on the right):

[0046] Before the left piston plate 5 moves, its right side wall is in contact with the right side of the left heat exchange chamber 4, and at this time the stopper 9 is closing the through hole 8, and at this time the first spring 10 is compressed to the limit. Before the driving group drives the piston plate 5 to move to the left, the sealing piece 7 on the left first releases the seal on the air hole 6 on the left, and then the piston plate 5 will drive the stopper 9 to move to the left together, but at this time the stopper 9 is continuously squeezed by the side wall of the heat exchange chamber 4 to maintain the seal on the through hole 8, so when the piston plate 5 moves to the left, the high-temperature gas inside the working chamber 3 will gradually pass through the air hole 6 to the left heat exchange chamber. The internal flow of the hot chamber 4 is to be cooled. After the piston plate 5 moves to the extreme left, the stopper 9 will move to the left side of the transition surface 11 on the left. When the stopper 9 moves to the left side of the transition surface 11, the stopper 9 will push the stopper 9 to fit with the inner wall of the heat exchange chamber 4 under the elastic expansion action of the first spring 10. At this time, the stopper 9 will release the seal of the through hole 8 on the left. At this time, the high-temperature gas inside the heat exchange chamber 4 on the left will be connected to the outside through the gap, and then the high-temperature gas inside the working chamber 3 will be discharged to achieve heat dissipation. At this time, the interior of the heat exchange chamber 4 will also be cooled, which is convenient for the next injection of low-temperature gas.

[0047] When the two piston plates 5 on the left and right sides move from the rightmost position to the leftmost position, the driving group will control the two sealing plates 7 to seal the two air holes 6 at the same time, and at this time the left stopper 9 is on the left side of the left transition surface 11, and the left through hole 8 is opened, while the right stopper 9 closes the right through hole 8. At this time, the state of the left and right piston plates 5 when they move to the rightmost position is opposite to the state of the two piston plates 5 before they move to the right. When the driving group drives the two piston plates 5 to move cyclically, the left and right piston plates 5 will cyclically perform heat exchange work.

[0048] The present invention can repeatedly inject the low-temperature gas in the heat exchange chamber 4 into the high-temperature gas in the working chamber 3 during the reciprocating movement of the left and right piston plates 5, and discharge the high-temperature gas in the working chamber 3 into the heat exchange chamber 4 on the other side, so as to reduce the heat accumulation of the air in the working chamber 3 and achieve heat dissipation. This process is a multiple-step process, thereby ensuring that the use of the radio altimeter will not be affected by the high temperature generated.

[0049] In this method, gas heat is exchanged between the heat conducting plate 2 and the shell 1 under the action of heat conduction, and there is no need to use a fan to dissipate heat, thereby making the overall volume compact and eliminating the negative effects of large volume, high vibration, high maintenance and high overhaul caused by the use of a fan for heat dissipation, and the heat exchange effect is higher.

[0050] The drive group includes a reciprocating screw 12, a motor 13 arranged on both sides of the reciprocating screw 12, two second springs 17 and a drive rod 14. The output shafts of the two motors 13 are fixedly connected to the reciprocating screw 12. The two motors 13 are fixedly connected to the left and right sides of the inner wall of the working chamber 3 respectively. The drive rod 14 is fixedly connected between the two piston plates 5 and can slide left and right between the working chamber 3 and the two heat exchange chambers 4. Two push rods 15 are fixedly connected to the drive rod 14. The two push rods 15 are both located inside the working chamber 3. A connecting piece 16 is threadedly connected to the screw rod 12. The connecting piece 16 is slidably connected to the inner wall of the working chamber 3 and can push the two push rods 15 to move respectively. The two second springs 17 are respectively fixedly connected to the two heat conducting plates 2. Both heat conducting plates 2 are slidably connected to the working chamber 3 in the front and rear directions. Contact parts 18 are provided at both ends of the heat conducting plate 2. When the two push rods 15 contact the left and right ends of the heat conducting plate 2, they can push the heat conducting plate 2 to slide along the working chamber 3. The two sealing plates 7 are respectively fixedly connected to the left and right ends of the heat conducting plate 2.

[0051] like Figure 5-Figure 8 As shown:

[0052] Before the drive group is not working, that is, when both piston plates 5 are on the right side and not moving to the left, the connecting member 16 is on the far right, and at this time the right end of the connecting member 16 is in contact with the push rod 15 on the right, and the end of the push rod 15 on the right is pressing the contact portion 18, so at this time the contact portion 18 and the heat conducting plate 2 are in a state of compressing the second spring 17, and the side wall of the heat conducting plate 2 is in contact with the inner wall of the housing 1, and the sealing sheet 7 is in a state of sealing the air hole 6, when the output shaft of the motor 13 rotates together with the reciprocating screw 12 to make the connecting member 16 move to the left;

[0053] When the left end of the connecting member 16 contacts the left push rod 15, the driving rod 14 will maintain this position and will not move left or right. When the left end of the connecting member 16 contacts the left push rod 15, the driving rod 14 will push the left push rod 15 and the driving rod 14 to move to the left together. At this time, the driving rod 14 will drive the two piston plates 5 to move to the left together. When the driving rod 14 and the two push rods 15 move to the left together, the push rod 15 on the right will contact the contact portion 18, so that the elasticity of the second spring 17 is released, and then the second spring 17 will drive the heat conducting plate 2 to slide. At this time, the heat conducting plate 2 will move slightly in the direction close to the driving rod 14, so that the elasticity of the second spring 17 is released. At this time, the heat conducting plate 2 will not contact the inner wall of the shell 1, and this When the piston plate 5 moves to the left, the hot gas will flow into the heat exchange chamber 4 on the left to cool the working chamber 3. When the piston plate 5 moves to the left, the hot gas will flow into the heat exchange chamber 4 on the left to cool the working chamber 3. When the connecting member 16 pushes the left push rod 15 to move to the left contact portion 18, the inclined end surface of the side wall of the contact portion 18 will push the heat conduction plate 2 to slide along the working chamber 3 to the position where it fits with the shell 1 again. At this time, the second spring 17 is also compressed to the limit. At this time, the two sealing plates 7 will close the air holes 6 again, and then the stopper 9 on the left moves to the left side of the transition surface 11 on the left. At this time, the through hole 8 on the left will be opened, so that the hot gas inside the heat exchange chamber 4 on the left can be discharged from the heat exchange chamber 4.

[0054] Because when the piston plate 5 moves, the air hole 6 is opened and the piston plate 5 allows the low-temperature gas to enter and exit the working chamber 3. At this time, the heat conducting plate 2 is not in contact with the inner wall of the shell 1 but has a certain distance from it. Figure 12As shown, when the air hole 6 injects the low-temperature gas into the working chamber 3, the gas will blow through the middle of the heat conducting plate 2 and the shell 1, which can cool the working chamber 3 while blowing air to cool the high-temperature surfaces inside the heat conducting plate 2 and the shell 1.

[0055] Dehumidification sheets 19 are provided inside the two heat exchange chambers 4 .

[0056] like Figure 3 and Figure 4 As shown:

[0057] The dehumidification sheet 19 can be provided to dehumidify and absorb moisture from the outside air when it enters the heat exchange chamber 4 , thereby reducing the humidity of the outside air when it is blown into the working chamber 3 .

[0058] One side of each piston plate 5 is provided with an auxiliary group of auxiliary dehumidification sheets 19 for operation;

[0059] The auxiliary group includes an auxiliary closing block 20, which is slidingly connected to the piston plate 5 in the front and rear directions respectively. A third spring 21 is fixedly connected between the auxiliary closing block 20 and the inner wall of the piston plate 5. One side of the auxiliary closing block 20 is provided with a conical head 22, and the conical head 22 is fixedly connected to a pull rod 23. The two ends of the pull rod 23 are slidingly connected to the inside of the working chamber 3 and the heat exchange chamber 4 respectively. A fourth spring 24 is fixedly connected between the pull rod 23 and the inner wall of the working chamber 3, and the pull rod 23 can be pushed by the connecting part 16.

[0060] like Figure 5-Figure 7 as well as Figure 9 As shown:

[0061] When both piston plates 5 do not move from the right to the left, the pull rod 23 on the right is pushed to the right by the connecting piece 16. At this time, the fourth spring 24 is in a compressed state, so the conical head 22 on the right is on the right side of the auxiliary closing block 20. At this time, the through hole 8 on the right is not sealed, so the outside air can enter the inside of the heat exchange chamber 4 on the right. When the connecting piece 16 moves to the left and disengages from the push rod 15 on the right and moves to the left, the connecting piece 16 moves to the left. At this time, under the action of the fourth spring 24, it will gradually relax elastically, thereby causing the pull rod 23 and the conical head 22 on the right to move to the left. When the conical head 22 on the right side moves to contact with the auxiliary closing block 20, it will push the auxiliary closing block 20 to slide along the piston plate 5 toward the through hole 8 through its conical side wall and seal the through hole 8. At this time, the fourth spring 24 will be fully elastically relaxed, and the connecting piece 16 will be out of contact with the right pull rod 23, so as to reduce the opening time of the through hole 8. When used in humid special weather, the humid gas entering the heat exchange chamber 4 can be fully dehumidified by the dehumidification sheet 19, and then the low-temperature gas will be in a low-temperature and dry state when it enters the working chamber 3, avoiding damage to the components inside the shell 1.

[0062] When the connecting piece 16 moves to contact with the left push rod 15, the connecting piece 16 will push the left push rod 15 and the driving rod 14 to move left at the same time. At this time, both piston plates 5 will move left, and when the right piston plate 5 moves left, it will move simultaneously with the stopper 9 and the auxiliary closing block 20. However, in this process, as the auxiliary closing block 20 moves, it will keep in contact with the side wall of the conical head 22 while gradually moving left with the conical head 22, and the stopper 9 will gradually move toward the direction of the through hole 8 while contacting the transition surface 11. At this time, the stopper 9 and the auxiliary closing block 20 will gradually slide while keeping in contact and closing the through hole 8, until the auxiliary closing block 20 is out of contact with the conical head 22, and the third spring 21 drives the auxiliary closing block 20 to move to a position away from the through hole 8, and the stopper 9 closes the through hole 8, and then the piston plate 5 continues to move left, so that the low-temperature dry gas inside the heat exchange chamber 4 on the right can enter and exit the interior of the working chamber 3;

[0063] When the piston plate 5 on the left moves to the left, the connecting piece 16 contacts the push rod 15 on the left, but before that, the connecting piece 16 contacts the pull rod 23 on the left and pushes the pull rod 23 on the left to compress the fourth spring 24. At this time, the pull rod 23 on the left and the conical head 22 on the left will move to the left first, and then the stopper 9 on the left and the auxiliary closing block 20 will move to the left at the same time. After the stopper 9 on the left moves to the left side of the transition surface 11, the stopper 9 will release the sealing of the through hole 8 on the left. At this time, the left The high-temperature gas inside the heat exchange chamber 4 will come into contact with the outside air and cool down. The outside gas will enter the heat exchange chamber 4 and be dehumidified by the dehumidification sheet 19 on the left. Then, the connecting piece 16 moves from the left to the right. At this time, the left pull rod 23 will move to the right under the elastic expansion of the fourth spring 24, causing the conical head 22 to move to the right to push the auxiliary closing block 20 on the left to close the through hole 8, thereby ensuring that the dehumidification sheet 19 will not continue to dehumidify when the heat exchange chamber 4 is connected to the outside.

[0064] Through the cooperation of the auxiliary closing block 20, the pull rod 23 and the fourth spring 24 with the connector 16, the dehumidification of the dehumidification sheet 19 will not be always exposed to the external humid air for dehumidification, but will be sealed after the air inside the heat exchange chamber 4 is cooled and the outside air enters, thereby improving the normal dehumidification work of the dehumidification sheet 19 when used in special humid weather, ensuring that the low-temperature gas injected into the working chamber 3 is dry rather than wet, thereby avoiding damage to internal components.

[0065] The dehumidification sheet 19 is a frame with a hollow interior and air holes in the side walls and is bonded to the inner wall of the heat exchange chamber 4. The dehumidification sheet 19 is provided with moisture-proof and dehumidifying materials.

[0066] like Figure 11 As shown:

[0067] When the dehumidification sheet 19 is a frame, it can be quickly replaced and disassembled without affecting normal use.

[0068] The inside of each through hole 8 is glued with a sponge layer 25 .

[0069] like Figure 10 As shown:

[0070] The sponge layer 25 cooperates with the filter layer of the through hole 8 to isolate dust and impurities without affecting the inflow and outflow of gas, thereby improving the cleanliness of the interior of the working chamber 3.

[0071] The side walls of the heat conducting plate 2 and the inner wall of the working chamber 3 in contact with the side walls of the heat conducting plate 2 are both wavy.

[0072] like Figure 12 As shown:

[0073] The side walls of the housing 1 and the heat conducting plate 2 are wavy, which can increase the time for low-temperature air to flow during air flow and improve the cooling effect.

[0074] Each group of air holes 6 may be one or more.

[0075] As shown in the figure:

[0076] By changing the number of air holes, the force of the wind blown out when the gas flows can be changed.

Claims

1. A radio altimeter package heat dissipation device, comprising a housing (1) and a heat conducting plate (2) arranged inside the housing (1), wherein the heat conducting plate (2) is used to provide mounting support for components of the radio altimeter, and the heat conducting plate (2) is in contact with the inner wall of the housing (1), and is characterized in that: A working chamber (3) and two heat exchange chambers (4) are provided inside the shell (1); both heat exchange chambers (4) are provided with notches communicating with the outside; the two heat conduction plates (2) are arranged inside the working chamber (3); and heat exchange groups are arranged on the left and right sides of the working chamber (3); The heat exchange group comprises a piston plate (5) and two groups of air holes (6) which are respectively slidably connected inside the two heat exchange chambers (4). The two piston plates (5) can move simultaneously in the left and right directions inside the heat exchange chamber (4). The two groups of air holes (6) are respectively located on the left and right sides of the working chamber (3) and are respectively connected to the two heat exchange chambers (4). A sealing sheet (7) is provided on the side of the two groups of air holes (6) away from the heat exchange chamber (4). A through hole (8) is provided on the two piston plates (5). A stopper (9) is provided on one side of the two through holes (8). The stopper (9) is respectively slidably connected to the two piston plates (5) in the front-rear direction. A first spring (10) is fixedly connected between the two stoppers (9) and the inner walls of the two piston plates (5). The side walls of the stoppers (9) are both wedge-shaped. Transition surfaces (11) are provided at positions corresponding to the inner wall of the heat exchange chamber (4) and the stoppers (9). A driving group is arranged between the two heat exchange groups, and is used to drive the two piston plates (5) to move simultaneously and to release and reset the sealing of the air holes (6) by the two sealing sheets (7) before and after the piston plates (5) move.

2. A radio altimeter package heat dissipation device according to claim 1, characterized in that: The driving group comprises a reciprocating screw (12), motors (13) arranged on both sides of the reciprocating screw (12), two second springs (17) and a driving rod (14), the output shafts of the two motors (13) are fixedly connected to the reciprocating screw (12), the two motors (13) are respectively fixedly connected to the left and right sides of the inner wall of the working chamber (3), the driving rod (14) is fixedly connected between the two piston plates (5) and can slide left and right between the working chamber (3) and the two heat exchange chambers (4), the driving rod (14) is fixedly connected to two push rods (15), the two push rods (15) are both located inside the working chamber (3), and the reciprocating screw (12) is fixedly connected to the two piston plates (5). A connecting piece (16) is threadedly connected to the multifilament rod (12); the connecting piece (16) is slidably connected to the inner wall of the working chamber (3) and can push the two push rods (15) to move respectively; the two second springs (17) are respectively fixedly connected to the two heat conducting plates (2); the two heat conducting plates (2) are both slidably connected to the working chamber (3) in the front-rear direction; contact portions (18) are provided at both ends of the heat conducting plate (2); the two push rods (15) can push the heat conducting plate (2) to slide along the working chamber (3) when contacting the left and right ends of the heat conducting plate (2); and the two sealing sheets (7) are respectively fixedly connected to the left and right ends of the heat conducting plate (2).

3. A radio altimeter package heat dissipation device according to claim 2, characterized in that: Dehumidification sheets (19) are arranged inside the two heat exchange chambers (4).

4. A radio altimeter package heat dissipation device according to claim 3, characterized in that: An auxiliary group for assisting the dehumidification sheet (19) to work is provided on one side of each of the two piston plates (5); The auxiliary group includes an auxiliary closing block (20), and the auxiliary closing block (20) is slidably connected to the piston plate (5) in the front-to-back direction, and a third spring (21) is fixedly connected between the auxiliary closing block (20) and the inner wall of the piston plate (5). One of the auxiliary closing blocks (20) is provided with a conical head (22), and the conical head (22) is fixedly connected to a pull rod (23), and the two ends of the pull rod (23) are respectively slidably connected to the inside of the working chamber (3) and the heat exchange chamber (4), and a fourth spring (24) is fixedly connected between the pull rod (23) and the inner wall of the working chamber (3), and the pull rod (23) can be pushed by the connecting piece (16).

5. The radio altimeter package heat dissipation device according to claim 3, characterized in that: The dehumidification sheet (19) is a frame body with a hollow interior and air holes on the side walls, and is bonded to the inner wall of the heat exchange chamber (4). A material for moisture-proofing and dehumidification is placed inside the dehumidification sheet (19).

6. A radio altimeter package heat dissipation device according to claim 1, characterized in that: The through holes (8) are all glued with a sponge layer (25) inside.

7. A radio altimeter package heat dissipation device according to claim 2, characterized in that: The side wall of the heat conducting plate (2) and the inner wall of the working chamber (3) in contact with the side wall of the heat conducting plate (2) are both wavy.

8. The radio altimeter package heat dissipation device according to claim 1, characterized in that: Each group of air holes (6) may be one or more.

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