Vortex cooling device for fire fighting

Abstract

The utility model discloses a vortex cooling device for fire fighting. The vortex cooling device comprises a device main body, a compressed air joint, a main vortex tube and more than two secondary vortex tubes, one end of the main vortex tube is a main cold air outlet; the size of the secondary vortex tubes is smaller than that of the main vortex tube, the secondary vortex tubes are evenly distributed on the peripheral side of the main vortex tube at intervals in the circumferential direction, secondary cold air outlets of the secondary vortex tubes face the main cold air outlet side of the main vortex tube, and the secondary heat dissipation ends of the secondary vortex tubes face the main heat dissipation end side of the main vortex tube. The compressed air connector is installed on the side close to the main cold air outlet, the compressed air connector is communicated with the secondary air inlet connector of each secondary vortex tube through a pipeline, and the secondary cold air outlet of each secondary vortex tube is communicated with the main air inlet cavity of the main vortex tube through a pipeline. Due to the fact that the vortex cooling device is provided with the main vortex tube and the auxiliary vortex tube, by means of the multi-stage vortex effect, air output from the main cold air outlet can have the low temperature, and the cold compress requirement of firefighters can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to a vortex cooling device for fire-fighting. Background Art

[0002] During firefighting training or rescue operations, firefighters will carry air breathing apparatus, which usually includes a mask and a cylinder of compressed air. During training and rescue operations, when firefighters are sprained due to accidents, they often need to apply cold compresses to the sprained area to relieve the injury. However, firefighters who go out for rescue operations usually do not carry other emergency cooling items or medicines, making it difficult for them to apply cold compresses in time.

[0003] The vortex tube is an energy separation device that can separate high-pressure gas into two airflows, cold and hot. It has been applied in many fields such as scientific research and industry. The vortex tube has a simple structure, mainly consisting of a nozzle, a vortex chamber, a separation orifice, a regulating device, and cold and hot end pipes. When working, the high-pressure gas enters the annular gas storage cavity through the inlet flow channel. Under the action of the pressure difference, it enters the vortex chamber at high speed along the tangent direction through one or more nozzles, generating a strong swirl motion. Energy separation will occur in the vortex tube, separating into two parts of airflow with unequal temperatures. The airflow in the center is low in temperature, while the airflow in the outer layer is high in temperature. This energy separation phenomenon of cold in the middle and hot in the outer layer is the "Rank effect" or "vortex effect".

[0004] Therefore, if a vortex tube is used in conjunction with the gas cylinders that firefighters carry at all times, emergency cold compress operations can be achieved. However, the refrigeration effect of the vortex tube when it is working is not obvious enough, and the cooling effect of the cold compress is poor, which needs some improvement. Utility Model Content

[0005] The utility model aims to provide a vortex cooling device for fire fighting, which has a good refrigeration effect and can meet the needs of emergency cold compress.

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

[0007] A vortex cooling device for fire fighting, comprising a device body, a compressed air joint, a primary vortex tube and more than two secondary vortex tubes;

[0008] The main vortex tube is located in the middle of the device body, and both ends of the main vortex tube protrude from the device body, one end of the main vortex tube is the main cold air outlet, and the other end is the main heat dissipation end;

[0009] The size of the secondary vortex tube is smaller than that of the primary vortex tube, and the secondary vortex tubes are evenly distributed on the outer circumference of the primary vortex tube and fixed on the device body, the secondary cold air outlet of each secondary vortex tube faces the main cold air outlet side of the primary vortex tube, and the secondary heat dissipation end of each secondary vortex tube faces the main heat dissipation end side of the primary vortex tube;

[0010] The compressed air connector is installed on one side of the device body close to the main cold air outlet, and the compressed air connector is also connected to the secondary air inlet connectors of each secondary vortex tube through a pipeline. The secondary cold air outlets of each secondary vortex tube are connected to the main air inlet chamber of the main vortex tube through a pipeline.

[0011] Furthermore, the main air intake chamber of the main vortex tube is provided with a number of main air intake joints adapted to the number of secondary vortex tubes, and the main air intake joints are respectively arranged on the outer wall of the main air intake chamber at uniform circumferential intervals, and the secondary cold air outlet branch pipes of each secondary vortex tube are connected to each main air intake joint to connect the main air intake chamber.

[0012] Furthermore, the number of the secondary vortex tubes is an odd number of three or more; the secondary vortex tubes and the connected main air intake joints are axially spaced from each other and also circumferentially spaced at an angle.

[0013] Furthermore, the compressed air joint is conductively connected to the secondary air intake joints of each secondary vortex tube through an annular connecting component; the annular connecting component includes a four-way joint, at least one three-way joint and a plurality of connecting pipes, and the number of four-way joints plus three-way joints is equal to the number of secondary vortex tubes; the four-way joint and the three-way joint are respectively arranged between two circumferentially distributed secondary vortex tubes, and the four-way joint and the three-way joint respectively have two horizontal ends, and the two horizontal ends are respectively connected along the circumferential direction through at least two connecting pipes to form an annular channel; the four-way joint also has two vertical ends, one end of which is connected to the compressed air joint, and the other end is connected to the secondary air intake joint of one of the secondary vortex tubes, and the three-way joint also has a vertical end, and is connected to the secondary air intake joints of other secondary vortex tubes.

[0014] Furthermore, the main vortex tube comprises a main inner tube and a main outer tube which are coaxially sleeved inside and outside, a main vortex cavity is formed inside the main inner tube, one end of the main vortex cavity is the main cold air outlet connected to the outside, and the other end is a main heat dissipation end side provided with a main conical surface protrusion, the main conical surface protrusion protrudes toward the main cold air outlet direction, and a main exhaust port is provided on the main conical surface protrusion to connect to the outside; a sealed main air intake chamber is formed between the main outer tube and the main inner tube, and the main air intake chamber is arranged close to the main cold air outlet side; a main air intake joint is provided on the outer wall of the main outer tube, and the main air intake joint is connected to the main air intake chamber; more than two main air intake holes are provided on the side wall of the main inner tube, and the main air intake holes are evenly spaced circumferentially distributed and are arranged along the tangent direction of the circumference of the main vortex cavity, and each main air intake hole connects the main air intake chamber and the main vortex cavity;

[0015] The structure of the secondary vortex tube is the same as that of the primary vortex tube, and the overall size of the secondary vortex tube is smaller than that of the primary vortex tube;

[0016] Furthermore, the number of the main air inlet holes on the side wall of the main inner tube is an odd number of three or more.

[0017] Furthermore, copper speed reduction and silencer valves are provided on the outer ends of the main heat dissipation end and the secondary heat dissipation end.

[0018] Furthermore, the main body of the device includes an upper partition, a middle partition, a lower partition and a protective cover, wherein the upper partition and the lower partition are respectively arranged on the inner sides of the two ends of each secondary vortex tube, the middle partition is arranged between the upper partition and the lower partition, the protective cover is arranged on the outer periphery of the upper partition, the middle partition and the lower partition, and is arranged around the outer side of each secondary vortex tube, the middle partition is arranged at one end of the secondary air intake chamber close to the secondary heat dissipation end, and divides the internal space of the protective cover into a cold zone and a hot zone.

[0019] Furthermore, the lower partition is provided with heat dissipation holes.

[0020] Furthermore, the primary vortex tube and the secondary vortex tube of the fire-fighting vortex cooling device are both made of metal.

[0021] After adopting the above technical scheme, since the vortex cooling device has graded primary and secondary vortex tubes, when compressed air is input from the compressed air joint, the compressed air at room temperature can first enter the secondary vortex tube from the secondary air inlet joint of each secondary vortex tube and then be output from the secondary cold air outlet, thereby realizing the first-level cooling, and then enter the main air inlet chamber of the main vortex tube and be output from the main cold air outlet, thereby realizing the second-level cooling. By means of the multi-stage "vortex effect", the air finally output from the main cold air outlet can have a lower temperature, which can meet the needs of cold compress, and can output cold air with lower temperature than the existing single vortex tube. When a firefighter sprains his arm during training or rescue, the vortex cooling device can be taken out and connected to the gas cylinder of the air respirator, thereby realizing the output of low-temperature cold air and realizing emergency cold compress operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0023] Figure 2 An exploded view of an embodiment of the utility model;

[0024] Figure 3 A three-dimensional diagram of a hidden protective cover according to an embodiment of the present utility model;

[0025] Figure 4 A top view of an embodiment of the utility model;

[0026] Figure 5 for Figure 4 Sectional view at AA;

[0027] Figure 6 for Figure 5 Sectional view at CC of ;

[0028] Figure 7 for Figure 4 Cross-sectional view at BB;

[0029] Figure 8 for Figure 7 Stereoscopic view of.

[0030] Description of reference numerals: device body 1, upper baffle 11, middle baffle 12, lower baffle 13, heat dissipation hole 131, protective cover 14, compressed air joint 2, main vortex tube 3, main cold air outlet 31, main heat dissipation end 32, main air intake joint 33, main air intake chamber 34, main inner tube 35, main vortex chamber 351, main air intake hole 352, main outer tube 36, inner baffle 361, main conical protrusion 37, main exhaust port 371 , vortex tube 4, secondary cold air outlet 41, secondary heat dissipation end 42, secondary air intake joint 43, secondary air intake chamber 44, secondary inner tube 45, secondary vortex chamber 451, secondary air intake hole 452, secondary outer tube 46, secondary conical protrusion 47, secondary exhaust port 471, connecting pipe 5, annular connecting component 6, four-way joint 61, three-way joint 62, connecting pipe 63, copper deceleration silencer valve 7, outer vortex V1, inner vortex V2. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part 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 drawings here can be arranged and designed in various different configurations.

[0032] like Figures 1 to 8 As shown, a vortex cooling device for fire fighting of the utility model comprises a device body 1, a compressed air connector 2, a primary vortex tube 3 and more than two secondary vortex tubes 4.

[0033] The main vortex tube 3 is located in the middle of the device body 1, and the two ends of the main vortex tube 3 protrude from the device body 1, one end of the main vortex tube 3 is the main cooling air outlet 31, and the other end is the main heat dissipation end 32; the size of the secondary vortex tube 4 is smaller than that of the main vortex tube 3, and each secondary vortex tube 4 is evenly distributed on the outer peripheral side of the main vortex tube 3 at circumferential intervals and fixed on the device body 1, the secondary cooling air outlet 41 of each secondary vortex tube 4 faces the main cooling air outlet 31 side of the main vortex tube 3, and the secondary heat dissipation end 42 of each secondary vortex tube 4 faces the main heat dissipation end 32 side of the main vortex tube 3; the compressed air connector 2 is installed on one side of the device body 1 close to the main cooling air outlet 31, and the compressed air connector 2 is simultaneously connected to the secondary air intake connector 43 of each secondary vortex tube 4 by a pipeline, and the secondary cooling air outlet 41 of each secondary vortex tube 4 is respectively connected to the main air intake chamber 34 of the main vortex tube 3 by a pipeline.

[0034] In this way, since the vortex cooling device has graded primary and secondary vortex tubes 3 and 4, when compressed air is input from the compressed air connector 2, the compressed air at room temperature can first enter the secondary vortex tube 4 from the secondary air inlet connector 43 of each secondary vortex tube 4 and then be output from the secondary cold air outlet 41, thereby achieving primary cooling, and then enter the main air inlet chamber 34 of the main vortex tube 3 and be output from the main cold air outlet 31, thereby achieving secondary cooling. Through the multi-stage "vortex effect", the air finally output from the main cold air outlet 31 can have a lower temperature, which can meet the needs of cold compress. When a firefighter sprains his arm during training or rescue, the vortex cooling device can be taken out and connected to the gas cylinder of the air respirator, thereby achieving the output of low-temperature cold air to meet the needs of cold compress.

[0035] Moreover, the vortex cooling device can be used in conjunction with commonly used gas cylinders and small tents to quickly cool down local spaces, thereby enabling multifunctional emergency treatment, such as providing a lower temperature environment for emergency treatment of patients with heat stroke.

[0036] Furthermore, a plurality of secondary vortex tubes 4 are arranged to be connected to the compressed air connector 2 at the same time, so as to perform flow diversion and improve the cooling efficiency.

[0037] See also Figure 6 In this embodiment, the main air intake chamber 34 of the main vortex tube 3 is provided with main air intake joints 33 whose number matches the number of the secondary vortex tubes 4. The main air intake joints 33 are arranged on the outer wall of the main air intake chamber 34 at even intervals in the circumferential direction. The secondary cold air outlets 41 of the secondary vortex tubes 4 are connected to the main air intake joints 33 through pipelines to connect to the main air intake chamber 34. The main air intake joints 33 are provided to facilitate product assembly and production.

[0038] Also see Figure 1 , Figure 2 and Figure 4, the number of the secondary vortex tubes 4 is an odd number of three or more, and the present embodiment takes three as an example, and the number of the corresponding main air intake joints 33 is also three; and the secondary vortex tube 4 and the connected main air intake joint 33 are axially spaced from each other, and circumferentially also have an angle interval, and the secondary vortex tube 4 and the main air intake joint 33 are connected by a connecting pipe 5, so that the connecting pipe 5 between the two can be arc-shaped, so that the compressed air output by the secondary vortex tube 4 can have a certain angle and enter the main air intake chamber 34 from the main air intake joint 33, which can enhance the vortex effect of the main vortex tube 3.

[0039] The structure and principle of the primary vortex tube 3 and the secondary vortex tube 4 of this embodiment are the same as those of the prior art, and the prior art structure can be adopted. Figure 2 , Figure 5 , Figure 7 and Figure 8 The structure shown in the figure is as follows: specifically, the main vortex tube 3 includes a main inner tube 35 and a main outer tube 36 which are coaxially sleeved inside and outside. A main vortex chamber 351 is formed inside the main inner tube 35. One end of the main vortex chamber 351 is the main cold air outlet 31 connected to the outside, and the other end is the main heat dissipation end 32 side provided with a main conical surface protrusion 37. The main conical surface protrusion 37 protrudes toward the main cold air outlet 31. The main conical surface protrusion 37 is provided with a main exhaust port 371 connected to the outside; a sealed main air intake chamber 34 is formed between the main outer tube 36 and the main inner tube 35, and the main air intake chamber 34 is arranged close to the main cold air outlet 31; the outer wall of the main outer tube 36 is provided with a main air intake joint 33, the main air intake connector 33 is connected to the main air intake chamber 34; more than two main air intake holes 352 are provided on the side wall of the main inner tube 35, and the present embodiment takes five main air intake holes 352 as an example, each main air intake hole 352 is evenly spaced circumferentially distributed, and is arranged along the tangent direction of the circumference of the main vortex chamber 351, and each main air intake hole 352 conducts the main air intake chamber 34 and the main vortex chamber 351; in the present embodiment, the main outer tube 36 and the main inner tube 35 are of equal length, both ends of the chamber between the main outer tube 36 and the main inner tube 35 are closed, and an inner partition plate 361 is provided on the inner side of the main outer tube 36 close to the main cold air outlet 31 to separate the main air intake chamber 34.

[0040] The structure of the secondary vortex tube 4 is the same as that of the main vortex tube 3, and the overall size of the secondary vortex tube 4 is smaller than that of the main vortex tube 3; the secondary vortex tube 4 includes a secondary inner tube 45 and a secondary outer tube 46 which are coaxially sleeved inside and outside, and a secondary vortex cavity 451 is formed inside the secondary inner tube 45, and one end of the secondary vortex cavity 451 is the secondary cold air outlet 41 connected to the outside, and the other end is a secondary heat dissipation end 42 side provided with a secondary conical protrusion 47, and the secondary conical protrusion 47 protrudes toward the secondary cold air outlet 41, and a secondary exhaust port 471 is provided on the secondary conical protrusion 47 to connect to the outside; a sealed secondary inlet is formed between the secondary outer tube 46 and the secondary inner tube 45. The air chamber 44, the secondary air intake chamber 44 is arranged close to the secondary cold air outlet 41 side; the outer wall of the secondary outer tube 46 is provided with a secondary air intake connector 43, and the secondary air intake connector 43 is connected to the secondary air intake chamber 44; the side wall of the secondary inner tube 45 is provided with more than two secondary air intake holes 452, and the number of main air intake holes 352 on the side wall of the main inner tube 35 can be three or more odd numbers, and the present embodiment takes five secondary air intake holes 452 as an example, each secondary air intake hole 452 is evenly spaced around the circumference, and is arranged along the tangent direction of the circumference of the secondary vortex cavity 451, and each secondary air intake hole 452 conducts the secondary air intake chamber 44 and the secondary vortex cavity 451.

[0041] In this embodiment, the secondary outer tube 46 is shorter than the secondary inner tube 45 , and both ends of the chamber between the secondary outer tube 46 and the secondary inner tube 45 are closed to form the secondary air intake chamber 44 .

[0042] The working principles of the primary vortex tube 3 and the secondary vortex tube 4 of this embodiment are the same as those of the prior art. Figure 8 Taking the working principle of the main vortex tube 3 as an example, the compressed air enters the main vortex chamber 351 from the main air inlet chamber 34 through the main air inlet holes 352, forming an outer vortex V1. The outer vortex V1 moves and hits the main conical protrusion 37 to form an inner vortex V2 in the opposite direction. The temperature of the inner vortex V2 will be lower than that of the outer vortex V1, and finally the cold air can be output from the main cold air outlet, while the main heat dissipation end 32 on the other side can dissipate part of the hot air for air pressure balance. The secondary vortex tube 4 is based on the same principle.

[0043] Specifically, the specific size of the vortex cooling device of this embodiment can be as follows:

[0044] The main inner tube 35 of the main vortex tube 3 has an inner diameter of 16 mm and a length of 440 mm, while the secondary inner tube 45 of the secondary vortex tube 4 has an inner diameter of 10 mm and a length of 180 mm. The vortex cooling device of this size is connected to the gas cylinder of an air breathing apparatus commonly used by firefighters. When the pressure value of the compressed air output by the gas cylinder is selected to be 0.5 MPa, after experimental measurement, the final temperature of the cold air output by the main cold air outlet 31 is about -15 degrees Celsius.

[0045] To improve the efficiency of compressed air movement, refer to Figure 2 In this embodiment, the compressed air joint 2 is connected to the secondary air intake joints 43 of each secondary vortex tube 4 through an annular connecting component 6; the annular connecting component 6 includes a four-way joint 61, at least one three-way joint 62 and a plurality of connecting pipes 63, the number of the four-way joints 61 plus the three-way joints 62 is equal to the number of the secondary vortex tubes 4, and two three-way joints 62 are provided in this embodiment; the four-way joint 61 and the three-way joint 62 are respectively arranged between two or more secondary vortex tubes 4 distributed in the circumferential direction, and the four-way joint 61 and the three-way joint 62 respectively have two horizontal ends, and the two horizontal ends are respectively connected along the circumferential direction through at least two connecting pipes 63 to form an annular channel, and compressed air can fill the annular channel; the four-way joint 61 also has two vertical ends, one end of which is connected to the compressed air joint 2, and the other end is connected to one of the four secondary air intake joints 43 of the secondary vortex tube through the connecting pipe 63, and the three-way joint 62 also has a vertical end, and is connected to the four secondary air intake joints 43 of other secondary vortex tubes through the connecting pipe 63. Therefore, by using the annular connecting component 6 , it can be achieved that the compressed air can be evenly and quickly distributed to each secondary vortex tube 4 after entering from the compressed air joint 2 .

[0046] In order to reduce noise during use, this embodiment is also provided with a copper deceleration and silencer valve 7 on the side of the main heat dissipation end 32 and the outer end of the secondary heat dissipation end 42. The copper deceleration and silencer valve 7 adopts the existing technology and can be fixed in the groove on the back of the main conical surface protrusion 37 and the secondary conical surface protrusion 47.

[0047] In order to facilitate the use of the vortex cooling device, the device body 1 includes an upper partition 11, a middle partition 12, a lower partition 13 and a protective cover 14, wherein the upper partition 11 and the lower partition 13 are respectively arranged on the inner side of the two ends of each secondary vortex tube 4, so as to facilitate the fixing of each secondary vortex tube 4, the middle partition 12 is arranged between the upper partition 11 and the lower partition 13, the protective cover 14 is arranged on the outer periphery of the upper partition 11, the middle partition 12, and the lower partition 13, and is arranged around the outer side of each secondary vortex tube 4, and the annular connecting component 6 can also be located inside the protective cover 14; the middle partition 12 is arranged at one end of the secondary air intake chamber 44 close to the secondary heat dissipation end 42, and divides the internal space of the protective cover 14 into a cold zone and a hot zone for zoned heat dissipation, and at the same time, the lower partition 13 can be provided with heat dissipation holes 131 to dissipate heat in the hot zone.

[0048] The upper baffle 11, the middle baffle 12 and the lower baffle 13 of this embodiment are all annular plates with holes in the middle for the main vortex tube 3 to pass through and be fixed, while the protective cover 14 is in the shape of a tube with two ends penetrated.

[0049] In this embodiment, the primary vortex tube 3 and the secondary vortex tube 4 of the fire-fighting vortex cooling device can be made of metal materials to provide heat conduction and heat dissipation effects and improve product durability.

[0050] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0051] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. A vortex cooling device for fire fighting, characterized in that: It includes a device body, a compressed air joint, a primary vortex tube and more than two secondary vortex tubes; The main vortex tube is located in the middle of the device body, and both ends of the main vortex tube protrude from the device body, one end of the main vortex tube is the main cold air outlet, and the other end is the main heat dissipation end; The size of the secondary vortex tube is smaller than that of the primary vortex tube, and the secondary vortex tubes are evenly distributed on the outer circumference of the primary vortex tube and fixed on the device body, the secondary cold air outlet of each secondary vortex tube faces the main cold air outlet side of the primary vortex tube, and the secondary heat dissipation end of each secondary vortex tube faces the main heat dissipation end side of the primary vortex tube; The compressed air connector is installed on one side of the device body close to the main cold air outlet, and the compressed air connector is also connected to the secondary air inlet connectors of each secondary vortex tube through a pipeline. The secondary cold air outlets of each secondary vortex tube are connected to the main air inlet chamber of the main vortex tube through a pipeline.

2. A fire-fighting vortex cooling device according to claim 1, characterized in that: The main air intake chamber of the main vortex tube is provided with main air intake joints whose number is adapted to the number of secondary vortex tubes, and the main air intake joints are respectively arranged on the outer wall of the main air intake chamber at uniform circumferential intervals, and the secondary cold air outlet branch pipes of each secondary vortex tube are connected to each main air intake joint to connect to the main air intake chamber.

3. A fire-fighting vortex cooling device according to claim 2, characterized in that: The number of the secondary vortex tubes is an odd number of three or more; the secondary vortex tubes and the connected main air intake joints are axially spaced apart from each other, and also circumferentially spaced apart at an angle.

4. A fire-fighting vortex cooling device according to claim 1, characterized in that: The compressed air joint is conductively connected to the secondary air intake joints of each secondary vortex tube through an annular connecting component; the annular connecting component includes a four-way joint, at least one three-way joint and a plurality of connecting pipes, and the number of four-way joints plus three-way joints is equal to the number of secondary vortex tubes; the four-way joint and the three-way joint are respectively arranged between two circumferentially distributed secondary vortex tubes, and the four-way joint and the three-way joint respectively have two horizontal ends, and the two horizontal ends are respectively connected along the circumferential direction through at least two connecting pipes to form an annular channel; the four-way joint also has two vertical ends, one end of which is connected to the compressed air joint, and the other end is connected to the secondary air intake joint of one of the secondary vortex tubes, and the three-way joint also has a vertical end, and is connected to the secondary air intake joints of other secondary vortex tubes.

5. A fire-fighting vortex cooling device according to claim 1, characterized in that: The main vortex tube comprises a main inner tube and a main outer tube which are coaxially sleeved inside and outside, a main vortex cavity is formed inside the main inner tube, one end of the main vortex cavity is the main cold air outlet connected to the outside, and the other end is a main heat dissipation end side provided with a main conical surface protrusion, the main conical surface protrusion protrudes toward the main cold air outlet direction, and a main exhaust port is provided on the main conical surface protrusion to connect to the outside; a sealed main air intake chamber is formed between the main outer tube and the main inner tube, and the main air intake chamber is arranged close to the main cold air outlet side; a main air intake joint is provided on the outer wall of the main outer tube, and the main air intake joint is connected to the main air intake chamber; more than two main air intake holes are provided on the side wall of the main inner tube, and the main air intake holes are evenly spaced circumferentially distributed and are arranged along the tangent direction of the circumference of the main vortex cavity, and each main air intake hole connects the main air intake chamber and the main vortex cavity; The structure of the secondary vortex tube is the same as that of the primary vortex tube, and the overall size of the secondary vortex tube is smaller than that of the primary vortex tube.

6. A fire-fighting vortex cooling device according to claim 5, characterized in that: The number of the main air inlet holes on the side wall of the main inner tube is an odd number of three or more.

7. A fire-fighting vortex cooling device according to claim 5, characterized in that: The outer ends of the main heat dissipation end and the secondary heat dissipation end are both provided with copper speed reduction and silencer valves.

8. The vortex cooling device for fire fighting according to claim 1, characterized in that: The device body includes an upper baffle, a middle baffle, a lower baffle and a protective cover, wherein the upper baffle and the lower baffle are respectively arranged on the inner sides of the two ends of each secondary vortex tube, the middle baffle is arranged between the upper baffle and the lower baffle, the protective cover is arranged on the outer periphery of the upper baffle, the middle baffle and the lower baffle, and is arranged around the outer side of each secondary vortex tube, the middle baffle is arranged at one end of the secondary air intake chamber close to the secondary heat dissipation end, and divides the internal space of the protective cover into a cold zone and a hot zone.

9. A fire-fighting vortex cooling device according to claim 8, characterized in that: The lower partition is provided with heat dissipation holes.

10. A fire-fighting vortex cooling device according to claim 1, characterized in that: The primary vortex tube and the secondary vortex tube of the fire-fighting vortex cooling device are both made of metal material.

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