Safety cabin air external circulation system

Abstract

The utility model discloses an air external circulation system of a safety cabin, which belongs to the technical field of air circulation systems of safety cabins and comprises an indoor safety cabin body, an air inlet pipeline for external air to flow in is arranged on the lower portion of the safety cabin body, and an air outlet pipeline for internal air to flow out is arranged on the upper portion of the safety cabin body. The air inlet pipeline and the air outlet pipeline respectively extend outdoors, an exhaust device is arranged on the air outlet pipeline, the flow of air flowing out of the safety cabin is not larger than the flow of air entering the safety cabin, an air inlet of the air inlet pipeline is connected with an air inlet device used for leading outdoor air into the cabin, and an air outlet of the air inlet pipeline is connected with an air outlet device used for leading the outdoor air into the cabin. The air outlet end of the air inlet equipment is connected with a one-way valve, the air flow direction of the one-way valve is from the outside to the inside of the cabin, positive pressure is formed in the safety cabin, high-temperature harmful gas in a fire area cannot permeate into the safety cabin, and the content of smoke dust and other harmful gas entering the safety cabin is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of safety cabin air circulation systems, in particular to a safety cabin air external circulation system. Background Art

[0002] The safety cabin is a temporary shelter where people can take refuge in the event of an emergency such as an earthquake or fire, and there is no time for them to move to a safe area. The safety cabin is a fully enclosed space that is relatively isolated from the outside air. To ensure the safety of the people in the cabin, it is necessary to ensure that the living environment in the cabin meets the basic living conditions and meets the basic requirements for the survival of the people.

[0003] The prior art, such as the invention patent with application number 201611012491.7, has fireproof and explosion-proof properties. The safety cabin is equipped with emergency equipment such as oxygen cylinders, mining lamps, first aid kits, fire extinguishers, and self-rescuers. An air circulation purification device is used to purify the air in the safety cabin, so that the environment in the safety cabin can meet people's needs for short-term survival. Another example is the utility model patent with application number 201620847551.6, which sets a smoke and dust removal device at the bottom of the safety cabin to filter the smoke in the air so that the air in the cabin can meet people's needs for short-term survival. The above-mentioned prior art is to improve the air quality in the safety cabin from the perspective of how to filter and purify the air. This technical solution has the following problems: when the smoke content entering the safety cabin with the air is greater than the filtering capacity of the filter device, the filtering capacity of the filter device for the air is reduced, and the air quality of the safety cabin will be reduced accordingly.

[0004] Therefore, it is urgent to design a safety cabin air external circulation system that can reduce the smoke content entering the installation cabin. Utility Model Content

[0005] The purpose of the utility model is to provide a safety cabin air external circulation system in view of the defects and shortcomings in the prior art, which forms a positive pressure in the safety cabin so that high-temperature harmful gases in the fire area cannot penetrate into the safety cabin, thereby reducing the content of harmful gases such as smoke entering the safety cabin.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides an air external circulation system for a safety cabin, comprising a safety cabin body located indoors, an air inlet pipe for external air to flow in is provided at the lower part of the safety cabin body, an air outlet pipe for internal air to flow out is provided at the upper part of the safety cabin body, the air inlet pipe and the air outlet pipe are respectively extended to the outdoors, an exhaust device is provided on the air outlet pipe, the gas flow rate out of the safety cabin is not greater than the gas flow rate into the safety cabin, the air inlet of the air inlet pipe is connected to the air inlet device for introducing outdoor air into the cabin, the air outlet end of the air inlet device is connected to a one-way valve, and the air flow direction of the one-way valve is from the outdoors to the cabin;

[0008] Preferably, the air outlet of the air inlet duct and the air inlet of the air outlet duct are located on the same side of the safety cabin body;

[0009] Preferably, the air outlet of the air inlet duct and the air inlet of the air outlet duct are located on the same straight line;

[0010] Preferably, the gas pressure in the safety cabin is greater than the gas pressure outside the safety cabin, and the difference between the gas pressure in the safety cabin and the gas pressure outside the safety cabin is 30Pa to 50Pa;

[0011] Preferably, the air inlet of the air inlet duct is arranged close to the ground and facing downward;

[0012] Preferably, the window sill of the building does not extend to the ground, the air inlet of the air inlet duct is located at the lower part of the window sill, and the distance between the air inlet of the air inlet duct and the ground is not greater than 0.6 m;

[0013] Preferably, the windowsill of the building extends to the ground, and fireproof glass is installed on the windowsill whose distance from the safety cabin body is less than 1m;

[0014] Preferably, the air outlet of the air outlet pipe is arranged horizontally or upwards;

[0015] Preferably, an intelligent control unit is provided in the safety cabin, and the intelligent control unit is signal-connected with the exhaust device and the air intake device;

[0016] Preferably, a smoke and dust filtering device is provided between the air inlet device and the one-way valve.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] 1. The utility model forms a positive pressure inside the safety cabin by adjusting the air intake flow rate and the air outlet flow rate, so that the high-temperature harmful gas in the fire area cannot penetrate into the safety cabin, and the content of harmful gases such as smoke entering the safety cabin is reduced; in addition, the air intake duct can bring fresh air from the outside into the safety cabin, and the air outlet duct can bring out the exhaust gas and heat in the safety cabin, so that the safety cabin can exchange air with the outside. During the air exchange process, not only can the required fresh air be added to the safety cabin, but the temperature in the safety cabin can also be reduced, thereby improving the comfort in the safety cabin.

[0019] Compared with the prior art, other technical solutions of the utility model have achieved the following technical effects:

[0020] 2. The utility model arranges the air outlet of the air inlet duct and the air inlet of the air outlet duct on the same side of the safety cabin, thereby shortening the distance between the air outlet of the air inlet duct and the air inlet of the air outlet duct, so that the airflow at the air outlet of the air inlet duct can quickly flow to the air inlet of the air outlet duct, increasing the pressure at the air inlet of the air outlet duct, so that the exhaust gas in the safety cabin can be discharged quickly.

[0021] 3. The utility model further reduces the content of harmful gases entering the safety cabin by placing the air inlet of the air inlet duct downward and arranging it where harmful gases such as smoke are thin. In addition, a smoke filter device is arranged at the air inlet to filter out a small amount of harmful gases such as smoke entering with the air, thereby improving the air quality in the safety cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a schematic diagram of the structure of the safety cabin air external circulation system.

[0024] Among them, 1. Safety cabin body; 2. Air intake duct; 3. Air outlet duct; 4. Exhaust equipment; 5. Air intake equipment; 6. One-way valve; 7. Air outlet of air intake duct; 8. Air inlet of air outlet duct; 9. Air inlet of air intake duct; 10. Air outlet of air outlet duct; 11. Intelligent control unit; 12. Backup power supply; 13. Wall. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 As shown, the utility model provides an external air circulation system for a safety cabin, comprising a safety cabin body 1 located indoors, an air inlet pipe 2 for external air to flow in is provided at the lower part of the safety cabin body 1, an air outlet pipe 3 for internal air to flow out is provided at the upper part of the safety cabin body 1, the air inlet pipe 2 and the air outlet pipe 3 respectively pass through the wall 13 and extend to the outdoors, an exhaust device 4 for exhausting the waste gas in the safety cabin to the outdoors is provided on the air outlet pipe 3, the gas flow out of the safety cabin is not greater than the gas flow into the safety cabin, so that a positive pressure is formed in the safety cabin, harmful gases such as smoke and dust in indoor smoke are not easy to penetrate into the safety cabin, and the content of harmful gases entering the safety cabin is reduced. As a preferred embodiment of the utility model, the difference between the gas pressure in the safety cabin and the gas pressure outside the safety cabin is 30Pa to 50Pa, and this pressure difference will not have a significant impact on the human body in a short time. The effect can meet the temporary escape needs. After the danger is lifted, the escapees in the safety cabin should leave the safety cabin as soon as possible. If necessary, they can go to the hospital for relevant examinations. To ensure that the outdoor air can enter the safety cabin, the air inlet of the air intake duct 2 is connected to the air intake device 5, which is used to lead the outdoor gas into the safety cabin. The air outlet of the air intake device 5 is connected to a one-way valve 6. The air flow direction of the one-way valve 6 is from the outside to the safety cabin. The air intake device 5 is a blower. A smoke filter device is provided between the blower and the one-way valve 6. The smoke filter device can be an electric dust collector, a filter dust collector, a wet and mechanical dust collector. The smoke filter device can filter out the smoke and other harmful gases entering from the air inlet 9 of the air intake duct 2. The exhaust device 4 is an exhaust fan. The exhaust fan can be a product in the prior art. The present application does not make any improvements to its structure. The air intake device 5 and the exhaust device 4 are both located outside the building to avoid the high temperature in the room causing the air intake device 5 and the exhaust device 4 to fail.

[0028] When the height is constant, compared with the situation where the air outlet 7 of the air inlet duct 2 and the air inlet 8 of the air outlet duct 3 are located on different sides of the safety cabin body 1, when the air outlet 7 of the air inlet duct 2 and the air inlet 8 of the air outlet duct 3 are located on the same side of the safety cabin body 1, the distance between the air outlet 7 of the air inlet duct 2 and the air inlet 8 of the air outlet duct 3 is the shortest, so that the gas entering the safety cabin through the air outlet 7 of the air inlet duct 2 can quickly flow to the air inlet 8 of the air outlet duct 3, increasing the gas pressure at the air inlet 8 of the air outlet duct 3, so that the exhaust gas in the safety cabin can be quickly discharged; further, the air outlet 7 of the air inlet duct 2 and the air inlet 8 of the air outlet duct 3 are located on the same straight line.

[0029] The air inlet 9 of the air intake duct 2 is located outdoors of the building, close to the ground and with the opening facing downward. When a fire occurs, the smoke and other harmful gases that float to the outdoors expand in volume and decrease in density. The smoke and other harmful gases rise from the bottom to the top, and the smoke and other harmful gases close to the ground are relatively scarce. Therefore, setting the air inlet 9 of the air intake duct 2 close to the ground can reduce the content of smoke and other harmful gases entering the safety cabin through the air inlet 9 of the air intake duct 2; setting the air inlet 9 of the air intake duct 2 downward can make the air inlet 9 of the air intake duct 2 further away from the smoke and other harmful gases floating upward, further reducing the content of smoke and other harmful gases entering the safety cabin through the air inlet 9 of the air intake duct 2.

[0030] When the fire is too big, the flames in the room may burn to the outside with the help of the windows of the building. For the case where the windowsill of the building does not extend to the ground (i.e., it is not a floor-to-ceiling window), the air inlet 9 of the air inlet duct 2 is located at the lower part of the windowsill. Since harmful gases such as smoke and dust floating out from the gaps in the windowsill rise upward, and there is no gap in the lower part of the windowsill through which harmful gases such as smoke and dust can float out, the air inlet 9 of the air inlet duct 2 is arranged at the lower part of the windowsill to avoid the backflow of harmful gases such as smoke and dust. The backflow phenomenon refers to: outdoor smoke and dust enter the safety cabin through the air inlet duct; as a preferred embodiment of the present invention, the distance between the air inlet 9 of the air inlet duct 2 and the ground is not more than 0.6m; for the case where the windowsill of the building extends to the ground (i.e., a floor-to-ceiling window), if a window vent is installed on the windowsill, the air inlet 9 of the air inlet duct 2 is not greater than 0.6m. If ordinary glass is installed, then when the glass breaks under high temperature conditions, harmful gases such as smoke in the room will float to the outside and enter the safety cabin from the air inlet 9 of the air inlet duct 2, causing the backflow of harmful gases such as smoke. In order to solve this problem, the utility model replaces the glass on the window sill less than 1m away from the safety cabin body 1 with ordinary glass instead of fireproof glass, and uses the fireproof glass to isolate harmful gases such as smoke, thereby solving the problem of harmful gases such as smoke flowing back into the safety cabin through the air inlet 9 of the air inlet duct 2; the building in this application refers to a building with a safety cabin placed inside it. If the building is a bungalow, the ground mentioned in this application refers to the surface of the land. If the building is a building, the ground mentioned in this application refers to the floor of the floor.

[0031] If the air outlet 10 of the air outlet duct 3 is set downward, the airflow discharged from the air outlet 10 of the air outlet duct 3 will drive harmful gases such as smoke and dust to flow toward the air inlet 9 of the air inlet duct 2, thereby increasing the content of harmful gases such as smoke and dust entering the safety cabin. In order to solve this technical problem, the utility model sets the air outlet 10 of the air outlet duct 3 horizontally or upward, so that the airflow discharged from the air outlet 10 of the air outlet duct 3 drives harmful gases such as smoke and dust to flow horizontally or upward, increases the distance between harmful gases such as smoke and dust and the air inlet 9 of the air inlet duct 2, and reduces the content of harmful gases such as smoke and dust entering the safety cabin; as a preferred embodiment of the utility model, the air outlet 10 of the air outlet duct 3 is set upward.

[0032] An intelligent control unit 11 is provided in the safety cabin, and the intelligent control unit 11 is signal-connected with the exhaust device 4 and the air intake device 5. When the intelligent control unit 11 detects that the gas pressure in the safety cabin is too low, it controls the exhaust device 4 to reduce the gas flow out of the safety cabin, and / or controls the air intake device 5 to increase the gas flow into the safety cabin; when the intelligent control unit 11 detects that the gas pressure in the safety cabin is too high, it controls the exhaust device 4 to increase the gas flow out of the safety cabin, and / or controls the air intake device 5 to reduce the gas flow into the safety cabin, so that the gas pressure in the safety cabin is maintained within a set range. Specifically, the intelligent control unit 11 adjusts the exhaust volume of the exhaust device 4 and the air intake volume of the air intake device 5 by adjusting the rotation of the fans of the exhaust device 4 and the air intake device 5 respectively.

[0033] A temperature detector is provided outside the safety cabin, and the temperature detector is connected to the intelligent control unit 11. When the temperature detector outside the safety cabin detects that the temperature outside the cabin exceeds 60 degrees (any value can be set), the intelligent control unit 11 transmits a signal to start the blower. The air inlet 9 of the air inlet duct 2 uses a 30W blower to supply air, the air supply frequency is 60 times / h, and the wind source ambient temperature is set to 25°C. During the continuous air exchange and circulation process, the heat energy generated by the cabin wall, cabin door, local thermal bridge and the personnel and equipment in the cabin will be discharged by the ventilation system. Therefore, during the internal and external air circulation process, not only can oxygen-containing air be added to the safety cabin, but also the temperature in the safety cabin can be effectively reduced, so that the air temperature in the safety cabin is close to the ambient temperature outside the building, thereby improving the comfort in the safety cabin; in order to further reduce the internal temperature of the safety cabin, the side walls of the safety cabin have undergone a series of fire-resistant and high-temperature resistant treatments. The fire-resistant and high-temperature resistant treatment measures can be carried out using existing technologies, and the utility model does not make improvements on this; a backup power supply 12 is also provided in the safety cabin, and the backup power supply 12 is used to power the electrical equipment in the safety cabin, and the backup power supply 12 will not block the air outlet 7 of the air inlet duct 2.

[0034] As a preferred embodiment of the utility model, the blower adopts: LH-110-30W, air volume: 253m 3 / h, wind pressure: 350pa, motor power: 30W, noise: 42dB, total air supply space 2.3m 3 , required air volume: 60 times per hour, total 138m 3 / h, power consumption: fan 30W / h, air intake system: cabin air inlet pipe specification D70mm, length 0.4m, exhaust system: cabin exhaust pipe specification D70mm, length 0.4m, air intake duct 2 and air outlet duct 3 are galvanized pipes, with 30mm insulation material and 3mm thick high-performance fire retardant coating to ensure that the air intake duct 2 and air outlet duct 3 will not be damaged in high temperature environment.

[0035] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A safety cabin air external circulation system, characterized in that: It includes a safety cabin body located indoors, wherein the lower part of the safety cabin body is provided with an air inlet duct for external gas to flow in, and the upper part of the safety cabin body is provided with an air outlet duct for internal gas to flow out, the air inlet duct and the air outlet duct respectively extend to the outdoors, and the air outlet duct is provided with an exhaust device, the gas flow out of the safety cabin is not greater than the gas flow into the safety cabin, the air inlet of the air inlet duct is connected to the air inlet device for introducing outdoor gas into the cabin, the air outlet end of the air inlet device is connected to a one-way valve, and the air flow direction of the one-way valve is from the outdoors to the cabin.

2. The safety cabin air external circulation system according to claim 1, characterized in that: The air outlet of the air inlet duct and the air inlet of the air outlet duct are located on the same side of the safety cabin body.

3. The safety cabin air external circulation system according to claim 2, characterized in that: The air outlet of the air inlet duct and the air inlet of the air outlet duct are located on the same straight line.

4. The safety cabin air external circulation system according to claim 1, characterized in that: The gas pressure in the safety cabin is greater than the gas pressure outside the safety cabin, and the difference between the gas pressure in the safety cabin and the gas pressure outside the safety cabin is 30Pa to 50Pa.

5. The safety cabin air external circulation system according to claim 1, characterized in that: The air inlet of the air inlet duct is arranged close to the ground and downward.

6. The safety cabin air external circulation system according to claim 5, characterized in that: The windowsill of the building does not extend to the ground, the air inlet of the air intake duct is located at the lower part of the windowsill, and the distance between the air inlet of the air intake duct and the ground is not more than 0.6m.

7. The safety cabin air external circulation system according to claim 5, characterized in that: The windowsill of the building extends to the ground, and fireproof glass is installed on the windowsill whose distance from the safety cabin body is less than 1m.

8. The safety cabin air external circulation system according to claim 1, characterized in that: The air outlet of the air outlet pipe is arranged horizontally or upwardly.

9. The safety cabin air external circulation system according to claim 1, characterized in that: An intelligent control unit is provided in the safety cabin, and the intelligent control unit is signal-connected with the exhaust device and the air intake device.

10. The safety cabin air external circulation system according to claim 1, characterized in that: A smoke and dust filtering device is provided between the air inlet device and the one-way valve.

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