Artificial component air system for underground space refuge island

Abstract

The invention provides an artificial component air system for an underground space refuge island. A liquid oxygen outlet of a low-temperature liquid oxygen storage device is communicated with a liquid inlet of a liquid oxygen air temperature type vaporizer, and a gas outlet of the liquid oxygen air temperature type vaporizer is communicated with an oxygen inlet of an air proportioning and mixing cabinet through an oxygen pressure regulating valve; a liquid nitrogen outlet of the low-temperature liquid nitrogen storage device is communicated with a liquid inlet of the liquid nitrogen air temperature type vaporizer, a gas outlet of the liquid nitrogen air temperature type vaporizer is communicated with a nitrogen inlet of the air proportioning and mixing cabinet through the nitrogen pressure regulating valve, and nitrogen and oxygen are mixed in the air proportioning and mixing cabinet to form artificial component air. An artificial component air outlet of the air proportioning and mixing cabinet is communicated with an inlet of the gas buffer tank, and an outlet of the gas buffer tank is communicated with a plurality of wall-attached air supply outlets formed in the wall surface of the refuge island. The air quality and the environment temperature in the refuge island can be rapidly and effectively adjusted under the emergency condition, and the breathing safety of refugees is effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation systems, and in particular relates to an artificial component air system for an underground space refuge island. Background Art

[0002] Compared with general ground buildings, underground space has the characteristics of complex structure and strong airtightness. Therefore, it is more difficult to organize the evacuation of disaster victims in underground space when fire, explosion, toxic gas leakage and other emergencies occur. In view of this, it is particularly important to build underground space refuge islands and improve the underground space emergency environment protection system according to the characteristics of underground space.

[0003] As an emergency shelter, the refuge island needs to meet the actual needs of personnel survival and the operation of some equipment. When a disaster occurs, the ambient temperature of the refuge island continues to rise due to the metabolism of the refugees and the operation of equipment. At the same time, due to human respiration, the oxygen content of the air in the island continues to decrease, and the carbon dioxide concentration continues to increase. Compared with ground buildings, underground space refuge islands are more difficult to dissipate heat to the environment, and cannot obtain fresh air from the outside.

[0004] Existing underground refuge islands mainly use compressed air and compressed oxygen to supply oxygen. The compressed air supply method requires the laying of special pipelines. Once a large-scale landslide occurs, the compressed air supply system will be destroyed in the accident, causing air supply failure, which is almost inevitable, making it difficult to ensure the safety of workers. In addition, the compressed oxygen supply method takes up a large space, which will reduce the available refuge space in the refuge island and reduce the number of refugees that the refuge island can accommodate. For example, a refuge island for 100 people needs to be equipped with up to 16 bottles of 80L compressed oxygen for 24 hours, which is often difficult to achieve in practice.

[0005] Therefore, considering the characteristics of underground refuge islands, it is necessary to design a more compact and efficient air conditioning system to meet the actual needs of refugees' survival and equipment operation, and to ensure that the air quality and ambient temperature in the refuge island can be adjusted quickly and effectively in an emergency. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention provides an artificial component air system for an underground space refuge island, which uses liquid nitrogen and liquid oxygen to provide air for the underground space refuge island. It occupies a small area and can increase the available refuge space in the refuge island. At the same time, it can also provide sufficient fresh air, which can ensure that the air quality and ambient temperature in the refuge island can be adjusted quickly and effectively in an emergency, effectively ensuring the breathing safety of the refugees.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an artificial component air system for an underground space refuge island, comprising a cryogenic liquid oxygen storage device and a cryogenic liquid nitrogen storage device arranged outside the refuge island, the liquid oxygen outlet of the cryogenic liquid oxygen storage device is connected to the liquid inlet of a liquid oxygen air-temperature vaporizer, and the gas outlet of the liquid oxygen air-temperature vaporizer is connected to the oxygen inlet of an air proportioning and mixing cabinet via an oxygen pressure regulating valve; the liquid nitrogen outlet of the cryogenic liquid nitrogen storage device is connected to the liquid inlet of the liquid nitrogen air-temperature vaporizer, and the gas outlet of the liquid nitrogen air-temperature vaporizer is connected to the nitrogen inlet of the air proportioning and mixing cabinet via a nitrogen pressure regulating valve, nitrogen and oxygen are mixed in the air proportioning and mixing cabinet to form artificial component air, the artificial component air outlet of the air proportioning and mixing cabinet is connected to the inlet of a gas buffer tank, and the outlet of the gas buffer tank is connected to a plurality of wall-attached air supply outlets opened on the wall of the refuge island.

[0008] Furthermore, the structures of the liquid oxygen air-temperature vaporizer and the liquid nitrogen air-temperature vaporizer are the same. Taking the structure of the liquid oxygen air-temperature vaporizer as an example, the liquid oxygen outlet of the low-temperature liquid oxygen storage device is connected to the liquid inlet of the liquid oxygen air-temperature vaporizer, and the gas outlet of the liquid oxygen air-temperature vaporizer is connected to the oxygen inlet of the air proportioning mixing cabinet via an oxygen pressure regulating valve; a cold water collector is arranged at the bottom of the liquid oxygen air-temperature vaporizer, and the water outlet of the cold water collector is connected to the inlet of the cold water purifier for treating the condensed water into drinking water, and the outlet of the cold water purifier is connected to the inlet of the water storage tank.

[0009] Furthermore, an air quality detection and feedback device is provided, and the air proportioning mixing cabinet is electrically connected to the air quality detection and feedback device.

[0010] Furthermore, a slit-shaped air outlet is set at the wall air outlet, and the air supply direction of the slit-shaped air outlet is toward the inner wall of the refuge island. The size of the slit-shaped air outlet meets the control wind speed at 1.0m away from the wall. requirements.

[0011] Furthermore, the amount of liquid oxygen storage required by the cryogenic liquid oxygen storage device is determined based on the number of people in the underground space refuge island, the per capita oxygen consumption rate and the guarantee time, as follows:

[0012] in: The number of people in the underground refuge island; is the average oxygen consumption rate per capita; is the time, the unit is day; is the conversion ratio of liquid oxygen to oxygen vaporization, , is the specific volume of gaseous oxygen, ; is the specific volume of liquid oxygen, ; 1440 is the coefficient for converting days into minutes; The amount of liquid nitrogen storage required by the cryogenic liquid oxygen storage device is determined according to the air component ratio, which is 4 times the liquid oxygen storage capacity of the cryogenic liquid oxygen storage device.

[0013] Furthermore, the structures of the liquid oxygen air-temperature vaporizer and the liquid nitrogen air-temperature vaporizer are the same. Taking the structure of the liquid oxygen air-temperature vaporizer as an example, the liquid oxygen outlet of the low-temperature liquid oxygen storage device is connected to the liquid inlet of the liquid oxygen air-temperature vaporizer via the liquid oxygen detection device, and the gas outlet of the liquid oxygen air-temperature vaporizer is connected to the oxygen inlet of the air proportioning mixing cabinet via the oxygen pressure regulating valve; the condensed water on the surface of the liquid oxygen air-temperature vaporizer is collected by a cold water collector, and the water outlet of the cold water collector is connected to the inlet of the cold water purifier for multiple filtration of the condensed water, and the outlet of the cold water purifier is connected to the inlet of the water storage tank, and the water after multiple filtration is passed into the water storage tank for storage to supply water for people in the underground space refuge island.

[0014] Furthermore, the amount of condensed water on the surface of the liquid oxygen air-temperature vaporizer is determined according to the amount of air required for liquid oxygen vaporization heat exchange in the cryogenic liquid oxygen storage device and the change in the moisture content of the air passing through the liquid oxygen air-temperature vaporizer, as follows:

[0015] in: The amount of air required for liquid oxygen vaporization heat exchange, ; is the humidity content of air after passing through the liquid oxygen air temperature vaporizer 5, 干空气 ; is the humidity content of air before passing through the liquid oxygen air temperature vaporizer 5, 干空气 ; Moisture content Determined by the following formula:

[0016] in: is the partial pressure of saturated water vapor at this temperature, ; is the atmospheric pressure, is the relative humidity; The calculation method of the amount of condensed water on the surface of the liquid nitrogen air-temperature vaporizer is the same as that of the liquid oxygen air-temperature vaporizer.

[0017] Furthermore, the amount of air required for liquid oxygen vaporization heat exchange According to the total heat absorption of liquid oxygen and liquid oxygen vaporization And the air enthalpy change is determined as follows:

[0018] in: is the enthalpy of air after passing through the gasifier, 干空气 ; is the enthalpy of air before passing through the gasifier, 干空气 ; Total heat absorption of liquid oxygen and liquid oxygen vaporization The calculation is done using the following formula:

[0019] in, The heat absorbed by a unit volume of liquid oxygen when it turns into 20°C gaseous oxygen; The heat absorbed by a unit volume of liquid nitrogen when it turns into 20°C gaseous oxygen; is the liquid oxygen storage capacity; is the storage capacity of liquid nitrogen;

[0020] in: The heat required for liquid oxygen vaporization, , The amount of heat required to raise the temperature from -183°C to 20°C is: ; ; , is the specific heat capacity of oxygen, is the oxygen density, The temperature rise of oxygen; Air enthalpy Determined by the following formula:

[0021] in: is the air temperature, The humidity content of air.

[0022] Furthermore, the input pressure of the air proportioning mixing cabinet is 0.4Mpa~1.0Mpa, the output pressure is 0.3Mpa~0.6Mpa, the oxygen content adjustment range is not less than 10%~30%, and the accuracy is ±1%.

[0023] Furthermore, it also includes a liquid oxygen detection device and a liquid nitrogen detection device. The liquid oxygen outlet of the low-temperature liquid oxygen storage device is connected to the liquid inlet of the liquid oxygen air-temperature vaporizer through the liquid oxygen detection device, and the liquid nitrogen outlet of the low-temperature liquid nitrogen storage device is connected to the liquid inlet of the liquid nitrogen air-temperature vaporizer through the liquid nitrogen detection device. The liquid oxygen detection device and the liquid nitrogen detection device are used for pressure, temperature and flow detection.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention provides an artificial component air system for an underground space refuge island, which prepares artificial component air by gasifying liquid nitrogen and liquid oxygen to generate nitrogen and oxygen, and proportioning the two gases according to the feedback results of the internal detection system of the refuge island, without laying a large number of pipe network systems. At the same time, the use of liquid oxygen / liquid nitrogen can greatly save storage space and improve the reliability and security efficiency of the refuge chamber; the present invention controls the air component proportioning in real time through the feedback results of air quality detection in the refuge island, and realizes intelligent and precise regulation of environmental air quality to the greatest extent; Furthermore, the present invention collects condensed water formed during the gasification of liquid nitrogen and liquid oxygen, thereby improving the water supply guarantee capability of the refuge island.

[0025] Furthermore, the island adopts the wall-attached air supply technology to directly deliver artificial component air into the human breathing area, thereby ensuring the breathing safety of the refugees to the greatest extent. The present invention adopts the wall-attached air supply technology to improve the breathing air quality of the people on the island and reduce the load at the same time, which can increase the refuge island's protection time and the number of refugees it can accommodate, and has practical significance and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the artificial component air system of the underground space refuge island Figure 1 ; Figure 2 Schematic diagram of the structure of the artificial component air system of the underground space refuge island Figure 2 ; Figure 3 It is a schematic diagram of the structure of an air-temperature vaporizer and a cold water preparation device; In the attached drawings: 1. Cryogenic liquid oxygen storage device; 2. Cryogenic liquid nitrogen storage device; 3. Liquid oxygen detection device; 4. Liquid nitrogen detection device; 5. Liquid oxygen air-temperature vaporizer; 6. Liquid nitrogen air-temperature vaporizer; 7. Oxygen pressure regulating valve; 8. Nitrogen pressure regulating valve; 9. Air proportioning mixing cabinet; 10. Gas buffer tank; 11. Wall-attached air supply outlet; 12. Air quality detection and feedback device; 13. Air supply valve; 14. Liquid inlet; 15. Gas outlet; 16. Cold water collector; 17. Cold water purifier; 18. Water storage tank. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementations. The following examples or drawings are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0028] See also Figure 1 , 2The present invention provides an artificial component air system for an underground space refuge island, wherein a cryogenic liquid oxygen storage device 1 and a cryogenic liquid nitrogen storage device 2 are respectively arranged outside the refuge island, the liquid oxygen outlet of the cryogenic liquid oxygen storage device 1 is connected to the liquid inlet of a liquid oxygen air-temperature vaporizer 5 via a liquid oxygen detection device 3, and the gas outlet of the liquid oxygen air-temperature vaporizer 5 is connected to the oxygen inlet of an air proportioning mixing cabinet 9 via an oxygen pressure regulating valve 7; The liquid nitrogen outlet of the low-temperature liquid nitrogen storage device 2 is connected to the liquid inlet of the liquid nitrogen air-temperature vaporizer 6 through the liquid nitrogen detection device 4, and the gas outlet of the liquid nitrogen air-temperature vaporizer 6 is connected to the nitrogen inlet of the air proportioning mixing cabinet 9 through the nitrogen pressure regulating valve 8; Nitrogen and oxygen form artificial component air in the air proportioning mixing cabinet 9. The artificial component air outlet of the air proportioning mixing cabinet 9 is connected to the inlet of the gas buffer tank 10, and the outlet of the gas buffer tank 10 is connected to multiple wall-attached air supply outlets opened on the wall of the refuge island; the air proportioning mixing cabinet 9 is electrically connected to the air quality detection and feedback device 12, which detects the air quality in the island in real time and feeds back the air quality to the air proportioning mixing cabinet 9. The air proportioning mixing cabinet 9 adjusts the component ratio of liquid oxygen and liquid nitrogen according to the feedback information, so as to realize intelligent and precise control of the environmental air quality to the greatest extent, and finally provide sufficient fresh air for the underground space refuge island, effectively ensuring the breathing safety of the refugees.

[0029] A slit-shaped air supply port 11 is arranged at the wall-attached air supply port, and the artificial component air in the gas buffer tank 10 is supplied downward along the wall surface through the slit-shaped air supply port 11 through the air supply valve 13. Since the flow velocity of the air supply jet is large and the static pressure is small near the vertical wall surface, while the static pressure is large far away from the vertical wall surface, the attached air supply jet is attached to the vertical wall surface under the action of the pressure difference until it hits the floor and deflects, forming an air lake in the human breathing area.

[0030] Furthermore, the liquid oxygen storage capacity of the cryogenic liquid oxygen storage device 1 is determined by the following formula:

[0031] in: The number of people in the underground refuge island should be 20 to 100; is the average oxygen consumption rate per person, set to no less than 0.4 ; is the time, the unit is day; Liquid oxygen to oxygen vaporization ratio , take 853.7, which is 1 L Liquid oxygen can provide 853.7 L Gaseous oxygen is provided for breathing by evacuees; 1440 is the factor for converting days into minutes.

[0032] Furthermore, the storage capacity of liquid nitrogen in the cryogenic liquid oxygen storage device 2 is determined according to the air component ratio as 4 times the storage capacity of liquid oxygen in the cryogenic liquid oxygen storage device 1.

[0033] Furthermore, the size of the slit air outlet 11 needs to meet the control wind speed at 1.0m from the wall. Requirements, general width b Take 0.03m~0.15m.

[0034] like Figure 3 As shown, the structures of the liquid oxygen air-temperature vaporizer 5 and the liquid nitrogen air-temperature vaporizer 6 are the same. Taking the structure of the liquid oxygen air-temperature vaporizer 5 as an example, the liquid oxygen outlet of the low-temperature liquid oxygen storage device 1 is connected to the liquid inlet 14 of the liquid oxygen air-temperature vaporizer 5 via the liquid oxygen detection device 3, and the gas outlet 15 of the liquid oxygen air-temperature vaporizer 5 is connected to the oxygen inlet of the air proportioning mixing cabinet 9 via the oxygen pressure regulating valve 7; the condensed water on the surface of the liquid oxygen air-temperature vaporizer 5 is collected by the cold water collector 16, and the water outlet of the cold water collector 16 is connected to the inlet of the cold water purifier 17 for multiple filtration of the condensed water, and the outlet of the cold water purifier 17 is connected to the inlet of the water storage tank 18, and the water after multiple filtration is passed into the water storage tank 18 for storage to supply water for people in the underground space refuge island.

[0035] Furthermore, the liquid oxygen air-temperature vaporizer 5 and the liquid nitrogen air-temperature vaporizer 6 contain multiple sets of fins, which can fully exchange heat between liquid nitrogen and liquid oxygen and ambient air to obtain nitrogen and oxygen, and generate condensed water.

[0036] Furthermore, the cold water purifier 17 should at least include a pre-filter, an activated carbon filter, a precision filter and a reverse osmosis membrane to ensure that the prepared cold water meets the standard for direct drinking.

[0037] Furthermore, the input pressure of the air proportioning mixing cabinet 9 is 0.4Mpa~1.0Mpa, the output pressure is 0.3Mpa~0.6Mpa, the oxygen content adjustment range is not less than 10%~30%, and the accuracy is ±1%.

[0038] Furthermore, the air proportioning and mixing cabinet 9 can fully mix mixed gases of multiple specified proportions to form artificial component air.

[0039] Furthermore, the air proportioning and mixing cabinet 9 can choose to use two power supply modes: power supply or built-in battery.

[0040] Furthermore, there should not be a large number of obstructions at the location of the wall-mounted air supply outlet, and there should be no obstacles near the impact area of ​​the attached air supply airflow. The artificial component air is sent downward along the side wall of the refuge island, deflected, and an air lake is formed.

[0041] Furthermore, the air quality detection and feedback device can detect the air quality in the island in real time and send a signal to the air proportioning mixing cabinet.

[0042] Furthermore, all devices are connected through pipelines.

[0043] Example 1 The refuge island is designed to accommodate 50 people for 7 days (168 hours). According to the specification, the area of ​​the chamber should not be less than 1.0 square meters per person. The refuge chamber is designed to have an area of ​​60 square meters and a net height of 2.5 meters. The underground space refuge island artificial component air system is used to protect the air environment on the island. First, the oxygen consumption required by the refuge island personnel is determined. Relevant research shows that the average oxygen consumption rate per person in the refuge chamber is 0.38 Here, the average oxygen consumption rate per person is taken as 0.5 , total oxygen consumption on the refuge island The calculation is as follows:

[0044] in: is the number of people, in this embodiment ; is the average oxygen consumption rate per person, in this embodiment ; is the time, the unit is day; 1440 is the factor for converting days into minutes.

[0045] According to the formula, it can be calculated that The oxygen consumption calculated here is gaseous oxygen, which needs to be converted into liquid oxygen. The proportional relationship calculation method is shown below.

[0046] Definition of liquid oxygen to oxygen vaporization ratio It is the volume of oxygen vaporized per unit volume of liquid oxygen.

[0047] Easy to know:

[0048] in: is the specific volume of gaseous oxygen, ; is the specific volume of liquid oxygen, .

[0049] Pick 0.88 , is 751.25 (20℃, standard atmospheric pressure), we can get:

[0050] That is 1 L Liquid oxygen can be vaporized to 853.7 L Gaseous oxygen.

[0051] From this, the liquid oxygen storage capacity can be calculated Since the ratio of oxygen to nitrogen in the air is about 1:4, the storage capacity of liquid nitrogen .

[0052] The cold water preparation of the artificial component air system of the underground refuge island relies on the collection of condensed water produced by the gasifier in the air. Determined by the following formula:

[0053] in: The amount of air required for liquid oxygen / liquid nitrogen vaporization heat exchange, ; is the humidity content of air after passing through the vaporizer, 干空气 ; is the humidity content of air before passing through the gasifier, 干空气 ; In this embodiment, the air temperature before passing through the gasifier is set to 30℃, relative humidity is 100%, the air temperature after passing through the vaporizer 20℃, relative humidity 20%. Moisture content It can be determined by the following formula:

[0054] in: is the partial pressure of saturated water vapor at this temperature, ; is the atmospheric pressure, .

[0055] Substitute it into the calculation and we get Dry air, 干空气 .

[0056] Air volume required for liquid oxygen / liquid nitrogen vaporization heat exchange The calculation needs to be based on the total heat absorption of liquid oxygen and liquid oxygen vaporization And the air enthalpy change is determined as follows:

[0057] in: is the enthalpy of air after passing through the gasifier, 干空气 ; is the enthalpy of air before passing through the gasifier, 干空气 ; First, calculate the heat absorbed by a unit volume of liquid oxygen when it is vaporized to 20°C gaseous oxygen .

[0058] It can be seen that:

[0059] in: The heat required for liquid oxygen vaporization, , The amount of heat required to raise the temperature from -183°C to 20°C is: ; The latent heat of vaporization of liquid oxygen is 213 , take the density of liquid oxygen as 1.14 ,but: .

[0060] Easy to know:

[0061] in, is the specific heat capacity of oxygen, take ; is the density of liquid oxygen, take ; is the temperature rise of oxygen, , so:

[0062] but: .

[0063] Similarly, the heat absorbed by a unit volume of liquid nitrogen when it is vaporized into 20℃ gaseous oxygen can be calculated. .

[0064] The total heat absorption is: .

[0065] It can be determined by the following formula:

[0066] in, is the air temperature, is the humidity content of air; The calculation can be obtained: 干空气 , 干空气 . Substituting into the calculation, we can get .

[0067] The final calculation is , that is, in this embodiment, water 181 can be produced .

[0068] The system of the present invention is aimed at the characteristics of the underground refuge island. The liquid nitrogen and liquid oxygen stored separately are gasified through a gasification device, sent to a proportioning cabinet to adjust the ratio to form artificial component air, and then sent to the air supply end of the refuge island to supply air using the wall-attached ventilation technology. At the same time, an air quality detection and feedback device is arranged in the island to adjust the ratio in real time, so as to ensure the breathing safety of the refugees on the island to the greatest extent. In addition, the condensed water formed in the gasification process is collected to improve the water source guarantee capacity of the refuge island, and to increase the refuge island guarantee time and the number of refugees. The continuous development and utilization of underground space has made its refuge system increasingly important. The existing underground space refuge room oxygen supply method cannot meet the refined regulation of the refuge island's breathing requirements for refugees. The device of the present invention can automatically detect the air quality in the refuge island and adjust the component ratio in real time. At the same time, the wall-attached air supply airflow organization technology is used in coordination. In addition, the moisture in the air can be extracted to generate cold water, which is impossible for the existing underground space refuge room oxygen supply system.

Claims

1. An artificial component air system for an underground refuge island, characterized in that: The invention comprises a cryogenic liquid oxygen storage device (1) and a cryogenic liquid nitrogen storage device (2) which are arranged outside the refuge island. The liquid oxygen outlet of the cryogenic liquid oxygen storage device (1) is connected to the liquid inlet of a liquid oxygen air-temperature vaporizer (5), and the gas outlet of the liquid oxygen air-temperature vaporizer (5) is connected to the oxygen inlet of an air proportioning and mixing cabinet (9) via an oxygen pressure regulating valve (7); the liquid nitrogen outlet of the cryogenic liquid nitrogen storage device (2) is connected to the liquid inlet of a liquid nitrogen air-temperature vaporizer (6), and the gas outlet of the liquid nitrogen air-temperature vaporizer (6) is connected to the nitrogen inlet of the air proportioning and mixing cabinet (9) via a nitrogen pressure regulating valve (8). Nitrogen and oxygen are mixed in the air proportioning and mixing cabinet (9) to form artificial component air. The artificial component air outlet of the air proportioning and mixing cabinet (9) is connected to the inlet of a gas buffer tank (10), and the outlet of the gas buffer tank (10) is connected to a plurality of wall-attached air supply ports opened on the wall of the refuge island.

2. The artificial component air system of an underground refuge island according to claim 1 is characterized in that: The liquid oxygen air-temperature vaporizer (5) and the liquid nitrogen air-temperature vaporizer (6) have the same structure. Taking the structure of the liquid oxygen air-temperature vaporizer (5) as an example, the liquid oxygen outlet of the low-temperature liquid oxygen storage device (1) is connected to the liquid inlet (14) of the liquid oxygen air-temperature vaporizer (5), and the gas outlet (15) of the liquid oxygen air-temperature vaporizer (5) is connected to the oxygen inlet of the air proportioning mixing cabinet (9) via the oxygen pressure regulating valve (7); a cold water collector (16) is provided at the bottom of the liquid oxygen air-temperature vaporizer (5), and the water outlet of the cold water collector (16) is connected to the inlet of a cold water purifier (17) for treating condensed water into drinking water, and the outlet of the cold water purifier (17) is connected to the inlet of a water storage tank (18).

3. The artificial component air system of an underground space refuge island according to claim 1 is characterized in that: An air quality detection and feedback device (12) is also provided, and the air proportioning and mixing cabinet (9) is electrically connected to the air quality detection and feedback device (12).

4. The artificial component air system of an underground refuge island according to claim 1 is characterized in that: A slit-shaped air supply outlet (11) is provided at the wall-attached air supply outlet. The air supply direction of the slit-shaped air supply outlet (11) is toward the inner wall of the refuge island. The size of the slit-shaped air supply outlet (11) satisfies the control wind speed at a distance of 1.0 m from the wall. requirements.

5. The artificial component air system of an underground refuge island according to claim 1 is characterized in that: The amount of liquid oxygen storage required by the cryogenic liquid oxygen storage device (1) is determined based on the number of people in the underground space refuge island, the oxygen consumption rate per person and the guarantee time, as follows: in: The number of people in the underground space refuge island; is the average oxygen consumption rate per person; For time; is the conversion ratio of liquid oxygen to oxygen vaporization, , is the specific volume of gaseous oxygen; is the specific volume of liquid oxygen; 1440 is the coefficient for converting days into minutes; The amount of liquid nitrogen storage required by the cryogenic liquid oxygen storage device (2) is determined according to the air component ratio and is four times the amount of liquid oxygen storage in the cryogenic liquid oxygen storage device (1).

6. The artificial component air system of an underground refuge island according to claim 1 is characterized in that: The liquid oxygen air-temperature vaporizer (5) and the liquid nitrogen air-temperature vaporizer (6) have the same structure. Taking the structure of the liquid oxygen air-temperature vaporizer (5) as an example, the liquid oxygen outlet of the low-temperature liquid oxygen storage device (1) is connected to the liquid inlet (14) of the liquid oxygen air-temperature vaporizer (5) via the liquid oxygen detection device (3), and the gas outlet (15) of the liquid oxygen air-temperature vaporizer (5) is connected to the oxygen inlet of the air proportioning mixing cabinet (9) via the oxygen pressure regulating valve (7); the condensed water on the surface of the liquid oxygen air-temperature vaporizer (5) is collected by a cold water collector (16), and the water outlet of the cold water collector (16) is connected to the inlet of a cold water purifier (17) for multiple filtration of the condensed water. The outlet of the cold water purifier (17) is connected to the inlet of a water storage tank (18), and the water after multiple filtration is passed into the water storage tank (18) for storage to supply water to people in the underground space refuge island.

7. The artificial component air system of an underground refuge island according to claim 6 is characterized in that: The amount of condensed water on the surface of the liquid oxygen air-temperature vaporizer (5) is determined based on the amount of air required for liquid oxygen vaporization heat exchange in the cryogenic liquid oxygen storage device (1) and the change in the moisture content of the air passing through the liquid oxygen air-temperature vaporizer (5), specifically as follows: in: The amount of air required for heat exchange for liquid oxygen vaporization; is the humidity content of air after passing through the liquid oxygen air temperature vaporizer 5; is the humidity content of the air before passing through the liquid oxygen air temperature vaporizer 5; Moisture content Determined by the following formula: in: is the partial pressure of saturated water vapor at that temperature; is the atmospheric pressure, is the relative humidity; The method for calculating the amount of condensed water on the surface of the liquid nitrogen air-temperature vaporizer (6) is the same as the method for calculating the amount of condensed water on the surface of the liquid oxygen air-temperature vaporizer (5).

8. The artificial component air system of the underground refuge island according to claim 7 is characterized in that: Air volume required for liquid oxygen vaporization heat exchange According to the total heat absorption of liquid oxygen and liquid oxygen vaporization And the air enthalpy change is determined as follows: in: is the enthalpy of air after passing through the gasifier; is the enthalpy of air before passing through the gasifier; Total heat absorption of liquid oxygen and liquid oxygen vaporization The calculation is done using the following formula: in, The heat absorbed by a unit volume of liquid oxygen when it turns into 20°C gaseous oxygen; The heat absorbed by a unit volume of liquid nitrogen when it turns into 20°C gaseous oxygen; is the liquid oxygen storage capacity; is the storage capacity of liquid nitrogen; in: The heat required for liquid oxygen vaporization; The heat required to raise the temperature from -183°C to 20°C; ; , is the specific heat capacity of oxygen, is the oxygen density, The temperature rise of oxygen; Air enthalpy Determined by the following formula: in: is the air temperature, The humidity content of air.

9. The artificial component air system of underground space refuge island according to claim 7, characterized in that: The input pressure of the air proportioning mixing cabinet (9) is 0.4Mpa~1.0Mpa, the output pressure is 0.3Mpa~0.6Mpa, the oxygen content adjustment range is not less than 10%~30%, and the accuracy is ±1%.

10. The artificial component air system of underground space refuge island according to claim 7, characterized in that: The invention also comprises a liquid oxygen detection device (3) and a liquid nitrogen detection device (4). The liquid oxygen outlet of the low-temperature liquid oxygen storage device (1) is connected to the liquid inlet of the liquid oxygen air-temperature vaporizer (5) via the liquid oxygen detection device (3). The liquid nitrogen outlet of the low-temperature liquid nitrogen storage device (2) is connected to the liquid inlet of the liquid nitrogen air-temperature vaporizer (6) via the liquid nitrogen detection device (4). The liquid oxygen detection device (3) and the liquid nitrogen detection device (4) are used for pressure, temperature and flow detection.

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