Self-heating device for starting communication equipment in extremely cold environment

Abstract

The invention discloses a spontaneous heating device for starting communication equipment in an extremely cold environment, which comprises a case main body and a case cover, the communication equipment is arranged in the case main body, and the case main body comprises a case bottom, and a first side wall, a second side wall, a third side wall and a fourth side wall which are hermetically connected with the case bottom; each of the first side wall, the second side wall, the third side wall and the fourth side wall is composed of an outer-layer machine frame and an inner-layer machine frame which are connected with each other, and a drawable middle interlayer is arranged between the outer-layer machine frame and the inner-layer machine frame of the second side wall, the third side wall and the fourth side wall; the middle interlayer is filled with a self-heating material which can react with oxygen to generate heat, and the middle interlayer can be pulled between the outer-layer machine frame and the inner-layer machine frame to adjust the contact area of the self-heating material and the oxygen in the air. According to the invention, enough heat can be provided in an extremely short time, rapid starting of the communication equipment in an extremely cold environment is ensured, emergency situations can be dealt with, and the reliability of the equipment is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating devices, and in particular relates to a self-heating device activated by communication equipment in an extremely cold environment. Background Art

[0002] The temperature in extremely cold areas is low and lasts for a long time. The winter temperature is almost always between -10℃ and -20℃, and the lowest temperature can even reach -45℃. In this environment, the battery of the communication equipment will be in an unstable state due to the low temperature, including: battery performance degradation, freezing of internal components of the equipment, weakening of the rigidity of metal hardware materials, abnormal transmission characteristics of electrical signals of the communication baseband chip, and deterioration of the sensitivity of the external antenna equipment. At this time, the communication equipment faces difficulties in starting up. In extreme cases, the communication equipment may not be able to start up, which seriously affects the communication experience. When the communication equipment is successfully started, heat will also be generated during its operation. At this time, the dependence of the communication equipment on the external heat source decreases, and the heat generated by the external heat source needs to be regulated to keep the communication equipment running at a suitable temperature.

[0003] The existing technical solution to start communication equipment in extreme cold conditions is to use an external power supply to heat the communication equipment so that the communication equipment is in a temperature environment where it can start normally. For some small devices, it is also possible to heat them by placing them close to the body and using body temperature to make the temperature reach the minimum startup temperature required by the device.

[0004] However, when using an external power supply for heating, due to the cold weather, the external power supply also needs to be started and preheated, which will cause problems such as long startup time, high energy consumption, and complicated operation of the communication equipment, which is difficult to meet the needs of fast startup in extremely cold environments. In addition, since the external power supply also needs to be started to provide heating, startup failures may occur in extremely cold conditions, resulting in a bad experience. Summary of the invention

[0005] In order to solve the problems of slow heating speed, high energy consumption, complicated operation and possible startup failure of existing communication equipment in extremely cold conditions, the present invention provides a self-heating device for starting communication equipment in extremely cold conditions. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] The present invention provides a self-heating device for communication equipment started in an extremely cold environment, comprising a chassis body and a chassis cover, wherein the communication equipment is arranged inside the chassis body, wherein:

[0007] The chassis body comprises a chassis bottom and a first side wall, a second side wall, a third side wall and a fourth side wall which are sealed and connected to the chassis bottom;

[0008] The first side wall, the second side wall, the third side wall and the fourth side wall are all composed of an outer frame and an inner frame connected to each other, and a drawable intermediate layer is provided between the outer frame and the inner frame of the second side wall, the third side wall and the fourth side wall; the intermediate layer is filled with a self-heating material that can react with oxygen to generate heat, and the intermediate layer can be drawn between the outer frame and the inner frame to adjust the contact area between the self-heating material and the oxygen in the air; the outer frame can prevent the heat generated by the self-heating material from entering the external environment, and the inner frame can allow the heat generated by the self-heating material to enter the inside of the chassis body to heat up the communication device;

[0009] A device interface hole is formed on the first side wall, and the device interface hole extends from the outer surface of the outer frame to the inner surface of the inner frame;

[0010] The case cover is provided with a flow guide opening, and the flow guide opening can be opened when the air pressure inside the case body is lower than the ambient air pressure to balance the pressure difference between the inside and outside of the case body.

[0011] In one embodiment of the present invention, the material of the outer machine frame and the box cover is a modified silicate material after nano-processing; the material of the inner machine frame is a carbon nano-material.

[0012] In one embodiment of the present invention, the self-heating material includes 55-60 parts by mass of reduced iron powder, 10-11 parts by mass of wood powder, 5 parts by mass of activated carbon and 3-4 parts by mass of salt.

[0013] In one embodiment of the present invention, 10 to 15 parts by mass of potassium peroxide is further added to the self-heating material as a catalyst.

[0014] In one embodiment of the present invention, a hole cover is connected to the diversion opening, the inner wall of the hole cover is connected to the inner wall of the box cover through a spring, and when the air pressure inside the chassis body is the same as the external ambient pressure, the hole cover can close the diversion opening.

[0015] In one embodiment of the present invention, a pull-out handle is provided on the top of the middle interlayer, and movable tooth structures are provided on the inner surface of the outer layer frame and the outer surface of the inner layer frame for clamping the middle interlayer at different positions.

[0016] In one embodiment of the present invention, a control switch is further provided on the outer frame, and the control switch is connected to the tooth structure through a driving mechanism to control the inclination angle of the tooth structure relative to the middle interlayer.

[0017] In one embodiment of the present invention, a detachable waste collection trough is further provided at the bottom of the second side wall, the third side wall and the fourth side wall, and the waste collection trough is communicated with the lower end of the middle interlayer.

[0018] In one embodiment of the present invention, at least one pluggable interface is further provided on the outer machine frame of the second side wall, the third side wall and the fourth side wall, and the pluggable interface extends from the outer machine frame to the middle interlayer.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention proposes a self-heating device for starting a communication device in an extremely cold environment, comprising a chassis body and a chassis cover, wherein the communication device is arranged inside the chassis body, wherein the chassis body comprises an outer frame and an inner frame connected to each other, and a drawable middle layer is arranged between the outer frame and the inner frame, wherein the outer frame comprises a heat insulating material, and the inner frame comprises a heat conductive material, and the middle layer can be freely filled with high-performance self-heating materials of different weights, so that the energy utilization rate is maximized, and sufficient heat can be provided in a very short time, so as to ensure the rapid startup of the communication equipment in an extremely cold environment, which is conducive to responding to emergencies and improving the reliability of the equipment. At the same time, the operation is simple, which is convenient for communication test personnel to work, and solves the problem of the difficulty in starting the communication equipment in an extremely cold environment.

[0021] 2. The present invention designs a diversion opening, which can automatically control the opening and closing of the diversion opening according to the pressure difference between the inside and outside of the device, thereby increasing the duration of the reaction and the heating intensity in the device.

[0022] 3. The middle interlayer of the present invention is a retractable structure, which can control the speed of the reaction by controlling the contact area between the reactants inside the interlayer and the air, thereby adjusting the temperature inside the device.

[0023] 4. The present invention provides a dual-purpose opening at the bottom of the device for filling the self-heating fuel and removing the waste, which can conveniently fill the self-heating material and remove the waste.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a self-heating device activated by a communication device in an extremely cold environment provided by an embodiment of the present invention;

[0026] Figure 2 It is a cross-sectional schematic diagram of an outer machine frame, a middle layer and an inner machine frame provided by an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1- Chassis body; 101- first side wall; 102- second side wall; 103- third side wall; 104- fourth side wall; 2- box cover; 3- communication equipment; 4- outer frame; 5- inner frame; 6- middle interlayer; 7- equipment interface hole; 8- diversion opening; 9- hole cover; 10- spring; 11- pull-out handle; 12- tooth structure; 13- control switch; 14- waste collection slot; 15- pluggable interface. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of a self-heating device for starting a communication device in an extremely cold environment proposed by the present invention in combination with the accompanying drawings and specific implementation methods.

[0030] The above and other technical contents, features and effects of the present invention are clearly presented in the following detailed description of the specific implementation modes in conjunction with the accompanying drawings. Through the description of the specific implementation modes, the technical means and effects adopted by the present invention to achieve the predetermined purpose can be more deeply and specifically understood. However, the attached drawings are only for reference and explanation purposes and are not used to limit the technical solutions of the present invention.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the statement "including one..." do not exclude the existence of other identical elements in the article or device including the elements.

[0032] Embodiment 1

[0033] This embodiment provides a self-heating device for starting communication equipment in an extremely cold environment. The self-heating device is a chassis structure with a sandwich, in which the communication equipment is placed. By adding or removing high-performance self-heating materials in the sandwich, the chassis temperature can be quickly made to reach the startup temperature of the communication equipment, so that the communication equipment can be successfully started. At the same time, during the operation of the communication equipment, according to the heating condition of the communication equipment, the contact area between the self-heating material and the air is added or reduced by pulling the sandwich, so that the chassis temperature is always at the normal working temperature of the communication equipment; the addition of heating materials can be controlled autonomously, which solves the shortcomings of the traditional method such as long heating time and complex operation, and provides a strong guarantee for the startup of communication equipment in extremely cold areas.

[0034] Specifically, see Figure 1 and Figure 2 , Figure 1 1 is a schematic diagram of a structure of a self-heating device activated by a communication device in an extremely cold environment provided by an embodiment of the present invention. Figure 2 It is a cross-sectional schematic diagram of an outer frame, an intermediate layer and an inner frame provided by an embodiment of the present invention. The self-heating device includes a chassis body 1 and a chassis cover 2, and a communication device 3 is arranged inside the chassis body 1, wherein the chassis body 1 includes a chassis bottom (not shown in the drawings) and a first side wall 101, a second side wall 102, a third side wall 103 and a fourth side wall 104 that are sealed and connected to the chassis bottom. The first side wall 101, the second side wall 102, the third side wall 103 and the fourth side wall 104 are all composed of an outer frame 4 and an inner frame 5 that are connected to each other, wherein a pull-out intermediate layer 6 is provided between the outer frame 4 and the inner frame 5 of the second side wall 102, the third side wall 103 and the fourth side wall 104, as shown in FIG. Figure 2 The middle interlayer 6 is filled with a self-heating material, which can react with oxygen in the air to quickly release energy and convert it into heat energy when receiving air, and can generate heat stably. In addition, the middle interlayer 6 can be pulled between the outer frame 4 and the inner frame 5 to adjust the contact area between the self-heating material and the oxygen in the air; the outer frame 4 can prevent the heat generated by the self-heating material from being dissipated to the external environment, and the inner frame 5 can allow the heat generated by the self-heating material to enter the chassis body 1 to heat up the communication device 3, so that the communication device is at a more suitable temperature.

[0035] Specifically, the outer frame 4 and the case cover 2 of this embodiment are made of heat-insulating materials, the inner frame 5 is made of high-performance heat-conducting materials, the middle interlayer 6 can be freely filled with high-performance self-heating materials, and the communication device 3 to be started is arranged inside the case body 1. Preferably, the material of the outer frame 4 and the case cover 2 is a modified silicate material after nano-processing, which has extremely low thermal conductivity and good thermal stability, and has good heat insulation performance, which can effectively isolate the external cold air from transferring to the inside of the case, and at the same time prevent the heat inside the case from losing to the outside, so that the self-heating material has a longer durability; the material of the inner frame 5 is a carbon nanomaterial, which can transfer heat.

[0036] In practice, the size of the chassis body of the self-heating device can be customized according to specific requirements, such as the volume of the communication device to be started, so that it fits the communication device better. In order to ensure the heat insulation performance of the chassis, the present invention also adopts a sealing design, that is, the chassis body 1 and the chassis cover 2 are connected in a sealable manner to ensure the isolation of the inside of the chassis from the external environment and reduce heat exchange. Any suitable existing sealing method can be used for sealing, and there is no limitation here.

[0037] Continue to see Figure 1 , a device interface hole 7 is provided on the first side wall 101 of the present embodiment, and the device interface hole 7 extends from the outer surface of the outer frame 4 to the inner surface of the inner frame 5, and may be circular or square. Specifically, in order to enable the interface or antenna of the communication device 3 to be used normally, a sealable device interface hole 7 is reserved on the first side wall 101 of the present embodiment, and the device interface hole 7 extends from the outer surface of the outer frame 4 to the inner surface of the inner frame 5, and the interface or antenna of the communication device 3 can extend from the device interface hole 7 to communicate or connect with other external devices. The periphery of the device interface hole 7 is filled with heat-insulating material, and the heat-insulating material can heat the extended antenna or interface, and can avoid the temperature loss of the device caused by the cold bridge effect to the greatest extent. In order to maintain the sealing of the chassis, the reserved device interface hole 7 fits the antenna or interface that needs to be extended as much as possible.

[0038] The self-heating material of this embodiment includes 55-60 parts by mass of reduced iron powder, 10-11 parts by mass of wood powder, 5 parts by mass of activated carbon and 3-4 parts by mass of salt. Specifically, the key components of the self-heating material are reduced iron powder, wood powder, activated carbon and salt; if there is no wood powder in the formula, the iron powder will quickly harden and no longer generate heat, and activated carbon has a strong adsorption property for gas. The heat of self-heating comes from the heat released by the rapid reaction of reduced iron powder with oxygen in the air, which makes the heat greater than the heat dissipation and causes the temperature to rise. In this reaction, the role of water and wood powder is to make various solid powder particles mixed and dispersed evenly, provide a contact surface for gas-solid two-phase reaction, which is conducive to the complete reaction of iron powder and increase the heat capacity of the formula.

[0039] The reaction process of this embodiment is:

[0040] Negative electrode Fe-2e - =Fe 2+

[0041] Positive electrode O2-2H2O+4e - =4OH -

[0042] The overall reaction is 2Fe+O2+2H2O=2Fe(OH)2

[0043] 4Fe(OH)2+2H2O+O2=4Fe(OH)3

[0044] 2Fe(OH)3=Fe2O3+3H2O

[0045] It should be noted that the water required at the beginning of the reaction comes from the moisture in the air, and the moisture generated during the reaction is absorbed by the desiccant activated carbon and can be used for subsequent reactions.

[0046] The self-heating material also contains carbon nanotubes, which enhance thermal conductivity and improve heating efficiency, so that the self-heating material can achieve rapid and stable heating effect, and significantly improve heating efficiency. By adjusting the ratio of metal oxides and carbon nanotubes in the self-heating material and the preparation process, the heating temperature and heating rate can be precisely controlled, thereby achieving rapid heating and improving the startup speed of communication equipment.

[0047] Further, in order to better improve the heating efficiency, 10 to 15 parts by mass of potassium peroxide are also added to the self-heating material as a catalyst. In order to facilitate the convenient connection between the cables on the communication equipment and the external equipment, in addition to the above-mentioned device interface holes 7, the outer frame 4 of the first side wall 101, the second side wall 102, the third side wall 103 and the fourth side wall 104 of this embodiment can also be provided with a pluggable interface 15, which extends from the outer frame 4 to the inner frame 5, and the pluggable interface 15 is located on one side of the middle interlayer 6 and will not pass through the middle interlayer 6. The position and number of the pluggable interface 15 can be designed according to the cable arrangement of the actual communication equipment. The pluggable interface 15 can be a through hole of appropriate size opened at an appropriate position on the outer frame 4, and a sealing plug is provided in the through hole. When the pluggable interface 15 needs to be used, the sealing plug is opened, and when it is not needed, it is sealed by the sealing plug to prevent cold air from entering.

[0048] During the startup of the communication equipment, it can be selected whether to pull out the drawable interlayer according to the ambient temperature, so that the external air contacts the self-heating material. The potassium peroxide in the self-heating material reacts with the carbon dioxide in the air to generate oxygen and potassium carbonate, which will further promote the redox reaction of the metal oxide in the self-heating material and generate a large amount of heat. The self-heating material does not need to rely on an external power supply, avoiding potential safety hazards. The safety of use is ensured by accurately controlling the heating temperature and heating rate. Since the communication equipment itself will also generate temperature after it is started, the heat provided by the external heat source can be appropriately reduced when the communication equipment is running. The present invention adopts a drawable interlayer mode, by placing the self-heating material at the interlayer, and controlling the contact area between the self-heating material and the air by drawing the interlayer during use to control the internal temperature, and always in the temperature range required for the normal operation of the communication equipment. At the same time, the pluggable interface can also be opened or closed depending on the reaction situation, so that the area of ​​the reactant contacting oxygen increases or decreases, thereby controlling the reaction speed, so that the communication equipment is always operated at a stable temperature.

[0049] Furthermore, the case cover 2 of the present embodiment is provided with a diversion opening 8, which can be opened when the air pressure inside the case body 1 is lower than the ambient air pressure to balance the internal and external pressure difference of the case body 1. The diversion opening 8 is connected with a hole cover 9, the inner wall of which is connected to the inner wall of the case cover 2 through a spring 10, and when the air pressure inside the case body 1 is the same as the external ambient air pressure, the hole cover 9 can close the diversion opening 8. Specifically, in order to better automatically control the reaction intensity and reaction time inside the case body 1, the present embodiment reserves a diversion opening 8 with a spring support on the case cover 2. The diversion opening 8 is connected with a hole cover 9, which can be opened inwardly, and the spring 10 provides a minimum force to support the hole cover 9 to close the diversion opening 8. When the atmospheric pressure inside and outside the closed case body 1 is consistent, the diversion opening 8 is automatically closed under the joint action of the hole cover 9 and the spring 10. After the diversion opening 8 is closed, the chemical reaction of the self-heating material inside the chassis body 1 will consume oxygen (reduced iron powder reacts with oxygen), and the pressure inside the chassis body 1 will decrease. When the pressure decreases to a certain level, the force caused by the pressure difference between the inside and outside of the chassis body 1 will pull the spring 10 and the hole cover 9, so that the diversion opening 8 automatically opens. After the diversion opening 8 is opened, due to the entry of external air, the pressure difference between the inside and outside of the chassis body will tend to be consistent, and the diversion opening 8 will automatically close again. In this way, automatic oxygen replenishment is achieved to allow the chemical reaction inside the sealed chassis to continue, so that the temperature is always in a relatively stable state.

[0050] In addition, a pull handle 11 is provided on the top of the middle interlayer 6. Figure 2As shown, a movable tooth structure 12 is provided on the inner surface of the outer frame 4 and the outer surface of the inner frame 5, which is used to clamp the middle interlayer 6 at different positions. A control switch 13 is also provided on the outer frame 4, and the control switch 13 is connected to the tooth structure 12 through a driving mechanism to control the inclination angle of the tooth structure 12 relative to the middle interlayer 6.

[0051] Specifically, a pull-out handle 11 is provided on the top of the middle interlayer 6 of the self-heating device, and the contact area between the reactants in the middle interlayer 6 and the air can be artificially controlled by pulling out the handle 11, thereby controlling the temperature in the closed space.

[0052] A removable waste collection trough 14 is also provided at the bottom of the second side wall 102, the third side wall 103 and the fourth side wall 104. The waste collection trough 14 is connected to the lower end of the middle interlayer 6. The waste generated by the reaction of the self-heating material will fall into the waste collection trough 14. The reaction waste can be cleaned by disassembling the waste collection trough 14.

[0053] The present invention proposes a self-heating device for starting communication equipment in an extremely cold environment, comprising a chassis main body and a chassis cover, wherein the communication equipment is arranged inside the chassis main body, wherein the chassis main body comprises an outer frame and an inner frame which are connected to each other, and a drawable middle layer is arranged between the outer frame and the inner frame, wherein the outer frame comprises a heat insulating material, and the inner frame comprises a heat conductive material, and the middle layer can be freely filled with high-performance self-heating materials of different proportions, so as to maximize the utilization rate of energy, provide sufficient heat in a very short time, ensure the rapid startup of the communication equipment in an extremely cold environment, be conducive to responding to emergencies and improving the reliability of the equipment, and at the same time, be simple to operate, facilitate the work of communication test personnel, solve the problem of difficulty in starting communication equipment in an extremely cold environment, be suitable for various extremely cold environments, and improve the reliability and continuous operation capability of the communication equipment.

[0054] The present invention designs a diversion opening, which can automatically control the opening and closing of the diversion opening according to the pressure difference between the inside and outside of the device, thereby improving the duration of the reaction and the heating intensity in the device. The middle interlayer of the present invention is a retractable structure, which can control the speed of the reaction by controlling the area of ​​contact between the reactants inside the interlayer and the air, thereby adjusting the temperature inside the device. The present invention provides a dual-use opening at the bottom of the device for filling self-heating fuel and removing waste, which can conveniently fill self-heating materials and remove waste.

[0055] In the several embodiments provided by the present invention, it should be understood that the apparatus and method disclosed by the present invention can be implemented in other ways. For example, the apparatus embodiments described above are only illustrative, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0056] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0057] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A self-heating device activated by a communication device in an extremely cold environment, characterized in that: The invention comprises a chassis body (1) and a chassis cover (2), wherein a communication device (3) is arranged inside the chassis body (1), wherein: The chassis body (1) comprises a chassis bottom and a first side wall (101), a second side wall (102), a third side wall (103) and a fourth side wall (104) which are sealed to the chassis bottom; The first side wall (101), the second side wall (102), the third side wall (103) and the fourth side wall (104) are all composed of an outer machine frame (4) and an inner machine frame (5) that are connected to each other. A drawable intermediate layer (6) is provided between the outer machine frame (4) and the inner machine frame (5) of the second side wall (102), the third side wall (103) and the fourth side wall (104); the intermediate layer (6) is filled with a self-heating material that can react with oxygen to generate heat, and the intermediate layer (6) can be drawn between the outer machine frame (4) and the inner machine frame (5) to adjust the contact area between the self-heating material and oxygen in the air; the outer machine frame (4) can prevent the heat generated by the self-heating material from entering the external environment, and the inner machine frame (5) can allow the heat generated by the self-heating material to enter the inside of the chassis body (1) to heat up the communication device (3); The first side wall (101) is provided with a device interface hole (7), and the device interface hole (7) extends from the outer surface of the outer machine frame (4) to the inner surface of the inner machine frame (5); The case cover (2) is provided with a flow guide opening (8), and the flow guide opening (8) can be opened when the air pressure inside the case body (1) is lower than the ambient air pressure to balance the pressure difference between the inside and outside of the case body (1).

2. The self-heating device for communication equipment activated in an extremely cold environment according to claim 1, characterized in that: The material of the outer machine frame (4) and the box cover (2) is a modified silicate material that has been subjected to nano-processing; the material of the inner machine frame (5) is a carbon nano-material.

3. The self-heating device for communication equipment activated in an extremely cold environment according to claim 1, characterized in that: The self-heating material comprises 55-60 parts by mass of reduced iron powder, 10-11 parts by mass of wood powder, 5 parts by mass of activated carbon and 3-4 parts by mass of salt.

4. The self-heating device for communication equipment activated in an extremely cold environment according to claim 3, characterized in that: 10 to 15 parts by mass of potassium peroxide is further added to the self-heating material as a catalyst.

5. The self-heating device for communication equipment activated in an extremely cold environment according to claim 1, characterized in that: The diversion opening (8) is connected to a hole cover (9), the inner wall of the hole cover (9) is connected to the inner wall of the box cover (2) via a spring (10), and when the air pressure inside the chassis body (1) is the same as the external environment, the hole cover (9) can close the diversion opening (8).

6. The self-heating device for communication equipment activated in an extremely cold environment according to claim 1, characterized in that: A pull-out handle (11) is provided on the top of the middle interlayer (6), and movable tooth structures (12) are provided on the inner surface of the outer machine frame (4) and the outer surface of the inner machine frame (5) for clamping the middle interlayer (6) at different positions.

7. The self-heating device for communication equipment activated in an extremely cold environment according to claim 6, characterized in that: The outer machine frame (4) is also provided with a control switch (13), and the control switch (13) is connected to the tooth structure (12) through a driving mechanism to control the inclination angle of the tooth structure (12) relative to the middle interlayer (6).

8. The self-heating device for communication equipment activated in an extremely cold environment according to claim 1, characterized in that: A detachable waste collection trough (14) is also provided at the bottom of the second side wall (102), the third side wall (103) and the fourth side wall (104), and the waste collection trough (14) is connected to the lower end of the middle interlayer (6).

9. The self-heating device for communication equipment activated in an extremely cold environment according to claim 8, characterized in that: At least one pluggable interface is also provided on the outer machine frame (4) of the second side wall (102), the third side wall (103) and the fourth side wall (104), and the pluggable interface extends from the outer machine frame (4) to the middle interlayer (6).

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