Mechanical pressurizing air supply system suitable for alpine regions and pressurizing space

Abstract

The utility model discloses a mechanical pressurizing air supply system suitable for an alpine region and a pressurizing space. The mechanical pressurizing air supply system comprises an air supply assembly and an air exhaust assembly. The exhaust assembly comprises a plurality of exhaust outlets formed in the pressurization space, and the exhaust outlets are connected with an exhaust pipeline to exhaust indoor air out of the pressurization space. A mechanical pressure gauge and a self-operated pressure regulating valve are further arranged on the exhaust pipeline; the mechanical pressure gauge is used for detecting the upstream pressure of the self-operated pressure regulating valve on the exhaust pipeline; and the self-operated pressure regulating valve is used for presetting the pressure and maintaining the air pressure in the pressurizing space to be stable. According to the system, pressure adjustment and pressure stabilization of the pressurization space are achieved by means of the characteristic that the pressure of the self-operated pressure adjusting valve can be automatically adjusted, pressurization air supply can be achieved without a PLC control system or an external power source, the equipment failure rate is reduced, and the system is high in reliability, low in cost and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pressurized building, in particular to a mechanical pressurized air supply system and pressurized space suitable for high-cold regions. BACKGROUND

[0002] In high-cold regions such as Qinghai-Tibet Plateau, Pamir Plateau, Bolivia Plateau, Brazil Plateau and Antarctic ice and snow plateau, personnel is prone to high altitude reaction due to low local air pressure and thin air, and in severe cases, even endanger personnel life. The principle of the pressurized building is to pressurize the space, adjust the internal air pressure of the space to be equivalent to that of the plain region, so that the problem of high altitude reaction can be solved, and the pressurized building is suitable for popularization and application in high-cold regions.

[0003] Since high-cold regions are mostly located in remote areas, transportation is difficult, and the climate is cold, the service conditions of equipment are poor, and operation and maintenance are challenging, especially in low-temperature conditions, the failure rate of electronic components will increase significantly, which puts high requirements on the long-term operation stability of the equipment system. The pressurized air supply system is a key system of the pressurized building, in order to maintain the continuous and stable pressurization of the pressurized space and the demand of personnel for fresh air, the current pressurized air supply system mostly adopts an electronic automatic control mode based on PLC. This system includes several differential pressure sensors and electric regulating valves, needs to be connected to an external power supply, and needs to be programmed for system joint debugging. Not only is the system expensive, the debugging process is complex, and the technical requirements are high, but the key is that the low-temperature environment will cause the switch failure of electronic components, resulting in the failure of the PLC control system, and the carbon dioxide concentration in the pressurized space with high personnel density accumulates quickly. At present, frequent air exchange based on the carbon dioxide concentration index is adopted, and the pressurized equipment and valves are prone to damage in advance due to frequent operation, resulting in a high equipment failure rate. UTILITY MODEL CONTENTS

[0004] In view of the problems that the current pressurized air supply system adopts an electronic automatic control mode and is prone to failure in a low-temperature environment, and frequent air exchange based on the carbon dioxide concentration index causes the pressurized equipment and valves to be prone to damage in advance due to frequent operation, and further causes poor reliability of the pressurized air supply, the utility model aims to provide a mechanical pressurized air supply system suitable for high-cold regions, and a pressurized space suitable for high-cold regions based on the above system. The system utilizes the pressure self-regulating characteristics of the self-operated pressure regulating valve to realize pressure regulation and pressure stabilization of the pressurized space, and can realize pressurized air supply without a PLC control system and external power supply, reduce the equipment failure rate, has high system reliability, low cost, and long service life.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A mechanical pressurized air supply system suitable for high-cold regions, comprising an air supply assembly and an air exhaust assembly; the air supply assembly comprises a pressurizing device arranged outdoors and a plurality of air supply outlets arranged in the pressurized space and connected to the air supply pipeline to supply air to the pressurized space; the air exhaust assembly comprises a plurality of air exhaust outlets arranged in the pressurized space, which are connected to the air exhaust pipeline to exhaust indoor air to the outside of the pressurized space; the air exhaust pipeline is provided with a mechanical pressure gauge and a self-acting pressure regulating valve; the mechanical pressure gauge is used to detect the pressure before the self-acting pressure regulating valve; the self-acting pressure regulating valve is used to preset the pressure and maintain the stable air pressure in the pressurized space.

[0007] Preferably, a wind pipe preheater is arranged on the upstream pipeline of the pressurizing device, the pressurizing device is provided with a pressurizing device preheater, and the air supply pipeline is provided with a pipeline electric heat tracing.

[0008] Preferably, the system further comprises an indoor manual pressure regulating valve and an outdoor manual pressure regulating valve; the indoor manual pressure regulating valve is installed inside the pressurized space and used to manually adjust the air pressure in the pressurized space; the outdoor manual pressure regulating valve is installed outside the pressurized space and used to manually adjust the air pressure in the pressurized space.

[0009] Preferably, the system further comprises a safety valve; the safety valve is installed on the pressurized space and used to release pressure when the pressure in the pressurized space exceeds the limit.

[0010] Preferably, the system further comprises an indoor pressure monitoring and alarming device; the indoor pressure monitoring and alarming device is installed in the pressurized space and used to alarm when the pressure in the pressurized space exceeds the limit.

[0011] Preferably, two groups of parallel pressurizing devices are arranged, one group of pressurizing devices is in operation, and the other group of pressurizing devices is in standby.

[0012] Preferably, the system further comprises an indoor CO2 concentration monitoring and alarming device; the indoor CO2 concentration monitoring and alarming device is installed in the pressurized space and used to alarm when the CO2 concentration in the pressurized space exceeds the limit.

[0013] Preferably, a maintenance valve is arranged near the upstream and downstream of the self-acting pressure regulating valve of the air exhaust pipeline, which is used for maintenance of the self-acting pressure regulating valve.

[0014] A pressurized space suitable for high-cold regions, which adopts the above-mentioned mechanical pressurized air supply system suitable for high-cold regions.

[0015] Preferably, the pressurized space comprises a living area and a transition space, the transition space is separated from the outdoor by an air-tight door one, the transition space is separated from the living area by an air-tight door two, the transition space is externally provided with a manual valve one for adjusting the pressure between the transition space and the outdoor, a mechanical pressure difference meter one for detecting the pressure difference between the transition space and the outdoor, the transition space is internally provided with a manual valve two for adjusting the pressure between the transition space and the outdoor, a mechanical pressure difference meter two for detecting the pressure difference between the transition space and the outdoor, a manual valve three for adjusting the pressure between the transition space and the living area, a mechanical pressure difference meter three for detecting the pressure difference between the transition space and the living area, and the living area is internally provided with a manual valve four for adjusting the pressure between the living area and the transition space, and a mechanical pressure difference meter four for detecting the pressure difference between the living area and the transition space.

[0016] The utility model has the advantages of:

[0017] The system utilizes the self-force pressure regulating valve to realize the pressure regulation and pressure stabilization of the pressurized space, and adopts the steady-state operation mode of the continuous air supply of the pressurizing equipment and the continuous exhaust of the self-force pressure regulating valve with the fixed opening to maintain the pressure in the pressurized space at the set value:

[0018] When the pressure in the pressurized space is regulated, all the valves in the pressurized space are closed, the pressurizing equipment continuously works to deliver the pressurized air into the pressurized space, the pressure in the pressurized space continuously increases, the opening of the self-force pressure regulating valve is manually adjusted to exhaust and depressurize (the opening of the self-force pressure regulating valve is realized by adjusting the spring), until the mechanical pressure meter displays that the pressure before the valve reaches the design value, and then the opening of the self-force pressure regulating valve is maintained.

[0019] Therefore, the dynamic operation is abandoned, the control of the pressurized air supply can be realized without a PLC control system and external power supply, the defects of complex PLC system establishment, complex debugging and high cost are overcome, the cost is low, and importantly, the problem that the low-temperature environment causes the PLC control system to fail is avoided, the system reliability is high, and moreover, the problem that frequent air exchange based on the carbon dioxide concentration index causes the pressurizing equipment and the valve to be frequently damaged is overcome, the equipment failure rate is reduced, and the system service life is long. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a schematic diagram of the mechanical pressurized air supply system suitable for high-cold regions in the utility model.

[0022] Figure 2 is a schematic diagram of the pressurized space suitable for high-cold regions in the utility model.

[0023] Figure 3 is a pressure regulation process of the pressurized space in the utility model.

[0024] Figure 4 is a flow chart of the pressurized space in the utility model for auxiliary heating.

[0025] Figure 5 is a processing flow chart of the pressurized equipment fault in the utility model.

[0026] Figure 6 is a processing flow chart of the self-powered pressure regulating valve fault in the utility model.

[0027] Figure 7 is a flow chart of the personnel entering the residential area through the transition space in the utility model.

[0028] Figure 8 is a flow chart of the personnel entering the outdoor area through the transition space in the utility model.

[0029] Fig. 1: 1-equipment room; 2-living space; 3-transition space; 4-air duct preheater; 5- booster equipment preheater; 6- booster equipment; 7-air supply duct; 8-mechanical pressure gauge; 9-service valve; 10-self-acting pressure regulating valve; 11-air exhaust duct; 12-air exhaust port; 13-duct electric heat tracing; 14-air supply port; 15-safety valve; 16-indoor CO2 concentration monitoring alarm device; 17-indoor pressure monitoring alarm device; 18-airtight door one; 19-airtight door two; 20-hand valve one; 21-mechanical differential pressure gauge one; 22-hand valve two; 23-mechanical differential pressure gauge two; 24-hand valve three; 25-mechanical differential pressure gauge three; 26-hand valve four; 27-mechanical differential pressure gauge four; 28-indoor hand pressure regulating valve; 29-outdoor hand pressure regulating valve. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0032] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "in", "out" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, which are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "XXX one", "XXX two", "XXX three", "XXX four" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The features and performances of the present application are further described in detail below in combination with examples.

[0036] Example one

[0037] The present embodiment discloses a mechanical pressurized air supply system suitable for high-cold regions, as shown in Figure 1 The air supply assembly includes a pressurizing device 6 arranged outdoors and a plurality of air supply ports 14 arranged in the pressurized space and connected to the pressurizing device 6 through an air supply pipeline 7, which supplies air to the pressurized space and pressurizes the pressurized space. The air exhaust assembly includes a plurality of air exhaust ports 12 arranged in the pressurized space, which are connected to an air exhaust pipeline 11 to exhaust indoor air to the outside of the pressurized space. The air exhaust pipeline 11 is provided with a mechanical pressure gauge 8 and a self-acting pressure regulating valve 10. The mechanical pressure gauge 8 is used to detect the pressure before the self-acting pressure regulating valve 10 on the air exhaust pipeline 11. The self-acting pressure regulating valve 10 is used to preset the pressure and maintain the stable air pressure in the pressurized space. Among them: the air supply port 14, the air exhaust port 12, the air supply pipeline 7, the pressurizing device 6 and the air exhaust pipeline 11 belong to the conventional setting, the air supply port 14 and the air exhaust port 12 are distributed according to the layout of the pressurized space, the air supply pipeline 7 and the air exhaust pipeline 11 are arranged according to the distribution of the air supply port 14 and the air exhaust port 12 respectively, the pressurizing device 6 can select air compressor, air blower and other devices that can provide pressure fresh air; The setting of the mechanical pressure gauge 8 and the self-acting pressure regulating valve 10 belongs to the characteristics of the system, both of which do not rely on electronic control and realize the function by pure mechanical means.

[0038] In this system, the self-acting pressure regulating valve 10 can realize the pressure regulation and pressure stabilization of the pressurized space by the characteristics of pressure self-regulation. For the pressurized space with high population density, the pressurizing device 6 is continuously working to supply air and the self-acting pressure regulating valve 10 is continuously exhausting air at a fixed opening to maintain a steady state operation mode, which can maintain the pressure in the pressurized space at a set value, as shown in Figure 3

[0039] ​When the pressure of the pressurized space is adjusted, all the valves in the pressurized space are closed, the pressurizing device 6 continuously works to deliver pressurized air into the pressurized space, the pressure in the pressurized space is continuously increased, the opening degree of the self-operated pressure regulating valve 10 is manually adjusted for exhaust and pressure reduction (the opening degree of the self-operated pressure regulating valve 10 is realized by adjusting the spring), until the mechanical pressure gauge 8 shows that the pressure before the valve reaches the design value, and then the current opening degree of the self-operated pressure regulating valve 10 is kept.

[0040] When the pressure of the pressurized space is adjusted, all the valves in the pressurized space are closed, the pressurizing device 6 continuously works to deliver pressurized air into the pressurized space, the pressure in the pressurized space is continuously increased, the opening degree of the self-operated pressure regulating valve 10 is manually adjusted for exhaust and pressure reduction (the opening degree of the self-operated pressure regulating valve 10 is realized by adjusting the spring), until the mechanical pressure gauge 8 shows that the pressure before the valve reaches the design value, and then the current opening degree of the self-operated pressure regulating valve 10 is kept.

[0041] Therefore, the system discards dynamic operation, and can realize the control of pressurized air supply without PLC control system and external power supply, overcomes the defects of complex PLC system construction, complex debugging and high cost, has low cost, and importantly, avoids the problem that the low-temperature environment causes the PLC control system to fail, has high system reliability, and overcomes the problem that frequent air exchange based on the carbon dioxide concentration index causes the pressurizing device 6 and the valve to frequently move and be easily damaged, reduces the equipment failure rate, and has long system service life.

[0042] In the system, the fixed opening degree of the self-operated pressure regulating valve 10 is determined according to the design value of the pressure before the valve, the design value of the pressure before the valve is determined according to the steady-state relationship that the air supply amount = the air exhaust amount + the air leakage amount, the control error of the self-operated pressure regulating valve 10 is artificially set, the pressure reduction caused by the leakage of the pressurized space and the personnel entering and leaving the pressurized space is compensated, so as to reduce the pressure fluctuation and the number of spring actions of the self-operated pressure regulating valve 10.

[0043] The system is suitable for high-cold regions and can also be applied to other similar environments. Since the application scene is generally remote and the environment is harsh, the reliability requirement is particularly high. The following are several schemes for increasing the reliability through redundancy design:

[0044] 1) If the self-operated pressure regulating valve 10 is used as a backup, the self-operated pressure regulating valve 10 is connected to the valve seat of the main valve, and the main valve is connected to the valve seat of the self-operated pressure regulating valve 10. Figure 1As shown, a duct preheater 4 is arranged on the upstream pipeline of the supercharging device 6, a supercharging device preheater 5 is arranged on the supercharging device 6, and a pipeline electric heat tracing 13 is arranged on the air supply pipeline 7. In the high-cold region, the temperature is low throughout the year, and in winter, it is extremely low, and even in summer, it is low, such as Figure 4 As shown, when the air heating device in the supercharging space fails, or when the air heating device in the supercharging space has insufficient heating effect, the duct preheater 4, the supercharging device preheater 5, and the pipeline electric heat tracing 13 can be selected to be turned on while the supercharged air is supplied. Under the action of the supercharging device 6, the outdoor cold air is first preheated by the duct preheater 4 on the upstream pipeline, then further heated by the supercharging device preheater 5 and the compression action of the supercharging device 6, and then heated by the pipeline electric heat tracing 13 on the air supply pipeline 7. Finally, the outdoor cold air is adjusted to a comfortable temperature and delivered to the indoor.

[0045] 2) As shown in Figure 1 The indoor manual pressure regulating valve 28 and the outdoor manual pressure regulating valve 29 are installed in the supercharging space respectively. The indoor manual pressure regulating valve 28 and the outdoor manual pressure regulating valve 29 are used as backup regulating valves and emergency relief valves, as shown in Figure 6 As shown, when the self-operated pressure regulating valve 10 fails, the indoor manual pressure regulating valve 28 and the outdoor manual pressure regulating valve 29 are used as backup regulating valves and manually adjusted pressure. When emergency overall pressure relief is needed, the indoor manual pressure regulating valve 28 and the outdoor manual pressure regulating valve 29 are used as emergency relief valves and quickly relieve pressure.

[0046] 3) As shown in Figure 1 A safety valve 15 is installed on the supercharging space. As shown in Figure 6 When the self-operated pressure regulating valve 10 fails and no one finds it, if its opening is too small to cause the pressure in the supercharging space to exceed the limit, the safety valve 15 can release the pressure to ensure safety.

[0047] 4) As shown in Figure 1 An indoor pressure monitoring and alarm device 17 is installed in the supercharging space. As shown in Figure 6 When the self-operated pressure regulating valve 10 fails and no one finds it, if its opening is too large to cause the pressure in the supercharging space to decrease to the lower limit, the indoor pressure monitoring and alarm device 17 can start the alarm and voice prompt personnel to troubleshoot.

[0048] 5) As shown in Figure 1 Two groups of supercharging devices 6 are arranged in parallel, one group is working and the other group is standby. As shown in Figure 5 When the working supercharging device 6 fails, the standby supercharging device 6 can be switched to improve reliability. In addition, the start and stop buttons of the supercharging device 6 can be arranged in the supercharging space, so that indoor and outdoor personnel can operate.

[0049] 6) For example Figure 1 As shown, an indoor CO2 concentration monitoring and alarm device 16 is installed in the pressurized space. Figure 5 As shown, when the booster device 6 malfunctions and cannot boost air supply normally, the air volume in the booster space becomes smaller and smaller, the opening of the self-regulating pressure regulating valve 10 becomes smaller and smaller, and eventually tends to close. The booster space cannot provide enough fresh air exchange, resulting in the carbon dioxide concentration in the booster space exceeding the limit, which threatens the health of people in the room. At this time, the indoor CO2 concentration monitoring alarm device 16 can activate the alarm and provide voice prompts for people to troubleshoot the fault.

[0050] For ease of maintenance, such as Figure 1 As shown, maintenance valves 9 are provided near the upstream and downstream of the self-regulating pressure regulating valve 10 on the exhaust duct 11 for use when maintaining the self-regulating pressure regulating valve 10.

[0051] Example 2

[0052] This embodiment discloses a pressurized space suitable for high-altitude and cold regions, such as Figure 2 As shown, the above-mentioned mechanical booster air supply system suitable for high-altitude and cold regions is adopted. It employs a steady-state operation mode where the booster device 6 continuously supplies air and the self-regulating pressure regulating valve 10 maintains a fixed opening for continuous exhaust, thus keeping the internal pressure at the set value at all times. (See...) Figure 3 It is suitable for high-altitude and cold regions, and can also be applied to other similar environments. To increase its reliability, it adopts various redundancy design schemes disclosed in Embodiment 1, see... Figure 4 to Figure 6 .

[0053] like Figure 2 As shown, in this embodiment, the pressurized space includes a residential area and a transition space 3. The transition space 3 is separated from the outside by an airtight door 18, and the transition space 3 is separated from the residential area by an airtight door 19. A manual valve 20 for adjusting the pressure between the transition space 3 and the outside, and a mechanical differential pressure gauge 21 for detecting the pressure difference between the transition space 3 and the outside are installed outside the transition space 3. A manual valve 22 for adjusting the pressure between the transition space 3 and the outside, a mechanical differential pressure gauge 23 for detecting the pressure difference between the transition space 3 and the outside, a manual valve 24 for adjusting the pressure between the transition space 3 and the residential area, and a mechanical differential pressure gauge 25 for detecting the pressure difference between the transition space 3 and the residential area are installed inside the residential area. A manual valve 26 for adjusting the pressure between the residential area and the transition space 3, and a mechanical differential pressure gauge 27 for detecting the pressure difference between the residential area and the transition space 3 are installed inside the residential area.

[0054] The process by which people enter the residential area from outdoors through transition space 3 is as follows: Figure 7As shown, when confirming that the transition space 3 is empty, open the manual valve 20 to depressurize the transition space 3 to the outdoor, until the mechanical pressure gauge 21 shows zero, at this time, the outdoor-transition space 3 pressure is balanced, open the air-tight door 18 to enter the transition space 3, then close the air-tight door 18, open the manual valve 24 to pressurize the transition space 3, until the mechanical pressure gauge 25 shows zero, at this time, the transition space 3 and the indoor pressure is balanced, open the air-tight door 2 to enter the indoor.

[0055] The process that the personnel enter the outdoor through the transition space 3 in the indoor is as follows: Figure 8 As shown, when confirming that the transition space 3 is empty, open the manual valve 20 to depressurize the transition space 3 to the outdoor, until the mechanical pressure gauge 21 shows zero, at this time, the outdoor-transition space 3 pressure is balanced, open the air-tight door 18 to enter the transition space 3, then close the air-tight door 18, open the manual valve 24 to pressurize the transition space 3, until the mechanical pressure gauge 25 shows zero, at this time, the transition space 3 and the indoor pressure is balanced, open the air-tight door 2 to enter the indoor.

[0056] The entering and exiting operations of the transition space 3 are realized by the manual valves, the personnel manually adjusts the opening degree, and appropriate pressurization and depressurization rates can be adopted, and the complicated PLC control system and the control mode of the electric regulating valve are abandoned.

[0057] The indoor can adopt a large space, or can be divided into several smaller spaces, for example, Figure 2 As shown, several independent indoor spaces 2 can be set, each indoor space 2 should have its own air-tight door, air supply port 14 and air exhaust port 12, and can also have its own safety valve 15, indoor pressure monitoring alarm device 17 and indoor CO2 concentration monitoring alarm device 16.

[0058] In order to protect and manage the equipment, as shown, Figure 2 The pressurization equipment 6, self-operated pressure regulating valve 10, mechanical pressure gauge 8, air pipe preheater 4 and the like are installed in the equipment room 1, which is separated from the indoor and the transition space 3, and does not need to be pressurized.

[0059] The above-described embodiments are part of the embodiments of the present application, rather than all the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A mechanical pressurized air supply system suitable for high-altitude and cold regions, comprising an air supply assembly and an exhaust assembly; the air supply assembly includes an outdoor pressurization device that delivers air to multiple air outlets within a pressurized space via air supply ducts, thereby supplying and pressurizing the pressurized space; the exhaust assembly includes multiple exhaust outlets within the pressurized space, the exhaust outlets being connected to exhaust ducts to discharge indoor air outside the pressurized space; characterized in that: The mechanical pressure gauge is used for detecting the pressure before the self-acting pressure regulating valve of the air exhaust pipeline.

2. The mechanical pressurized air supply system suitable for high-cold area as claimed in claim 1, wherein: The upstream pipeline of the pressurizing equipment is provided with an air pipe preheater, the pressurizing equipment is provided with a pressurizing equipment preheater, and the air supply pipeline is provided with a pipeline electric heat tracing.

3. The mechanical pressurized air supply system suitable for high-cold area as claimed in claim 1, wherein: The indoor manual pressure regulating valve and the outdoor manual pressure regulating valve are further included.

4. The mechanical pressurization air supply system suitable for high-cold area as claimed in claim 1, wherein: The safety valve is installed on the pressurizing space and is used for releasing pressure when the pressure in the pressurizing space exceeds the limit.

5. The mechanical pressurization air supply system suitable for high-cold area of claim 1, wherein: The indoor pressure monitoring and alarming device is installed in the pressurizing space and is used for alarming when the pressure in the pressurizing space exceeds the limit.

6. The mechanical pressurization air supply system suitable for high-cold area of claim 1, wherein: Two groups of parallel pressurizing equipment are provided, one group of pressurizing equipment is in operation, and the other group of pressurizing equipment is in standby.

7. The mechanical pressurization air supply system suitable for high-cold area of claim 1, wherein: The indoor CO2 concentration monitoring and alarming device is installed in the pressurizing space and is used for alarming when the CO2 concentration in the pressurizing space exceeds the limit.

8. The mechanical pressurization air supply system suitable for high-cold area of claim 1, wherein: The maintenance valve is provided near the upstream and downstream of the self-acting pressure regulating valve of the air exhaust pipeline and is used for maintenance of the self-acting pressure regulating valve.

9. A plenum space suitable for use in high altitude regions, characterized by: The mechanical pressurizing air supply system suitable for high-cold regions is adopted.

10. The plenum space suitable for use in cold climates of claim 9, wherein: The pressurizing space includes a living area and a transition space, the transition space is separated from the outdoor through an air-tight door one, the transition space is separated from the living area through an air-tight door two, the transition space is externally provided with a manual valve one for adjusting the pressure between the transition space and the outdoor and a mechanical pressure difference gauge one for detecting the pressure difference between the transition space and the outdoor, the transition space is internally provided with a manual valve two for adjusting the pressure between the transition space and the outdoor and a mechanical pressure difference gauge two for detecting the pressure difference between the transition space and the outdoor, a manual valve three for adjusting the pressure between the transition space and the living area and a mechanical pressure difference gauge three for detecting the pressure difference between the transition space and the living area, and the living area is internally provided with a manual valve four for adjusting the pressure between the living area and the transition space and a mechanical pressure difference gauge four for detecting the pressure difference between the living area and the transition space.

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