CN114623635B - Snow maker suitable for normal temperature environment - Google Patents

Abstract

The invention discloses a snowmaking machine suitable for a positive temperature environment, which comprises a cylindrical casing as a whole, an axial-flow fan is installed at the rear end of the casing, and annular nozzles and nuclei are installed at the front end of the casing along the circumferential direction. The water inlet end of the nozzle, the water inlet end of the nozzle and the water inlet end of the nuclear device are all connected with the high-pressure water system, and the air inlet end of the nuclear device is connected with the air compressor through the gas pipeline; it is characterized in that it also includes an air cooling system, an air cooling system Used to cool the air entering the nuclear reactor. The invention can improve the snowmaking effect of the snowmaking machine in positive temperature environment, and has the advantages of lower energy consumption and higher utilization efficiency of cooling capacity.

Description

A snow gun suitable for positive temperature environment

This application is a divisional application of the patent "A snowmaking method for snowmaking machines suitable for positive temperature environments" with application number 202110536243.7 and application date of 2021-5-17.

technical field

The invention relates to the technical field of snowmaking machine testing equipment, in particular to a snowmaking machine suitable for a positive temperature environment.

Background technique

The snow machine is a kind of artificial snow-making equipment, which is usually widely used in places such as ski resorts and ice rinks. Snowmaking machines are usually used in low temperature environments. The principle of snowmaking is to spray high-pressure water and high-pressure air through the nucleator to form small-sized snow nuclei, and then atomize the high-pressure water from the nozzle to collide with the snow nuclei. Combined to form snowflakes, and then rely on the wind blown by the blower to spray out to realize snowmaking.

In artificial ski resorts such as artificial ski resorts or ice and snow worlds, in order to reduce the cost of environmental temperature control, people usually hope to control the ambient temperature to a negative temperature environment close to zero degrees Celsius. In this way, due to weather changes or insufficient control accuracy, etc., often the ski resort will be in a positive temperature environment exceeding zero degrees Celsius from time to time. At the same time, in natural ski resorts, the ambient temperature may be greater than zero degrees Celsius due to the sun's heating up and other reasons. When using a snowmaking machine to make snow, after the high-pressure water is sprayed from the nozzle and the nuclear device, it usually needs to be in a negative temperature environment to better generate snowflakes and ensure the snowmaking effect. Therefore, it has become a problem to be considered and solved in this field to study and improve the snowmaking machine so that it can still have good snowmaking ability in a positive temperature environment close to zero degrees Celsius (mainly in the temperature range of 0-1°C).

CN201220534108.5 discloses a snowmaking machine spray head with an annular cooling water pipe. In this patent solution, an annular cooling water pipe that can use the high-speed wind generated by the blower motor to cool the water to be sprayed is set. The sprayed water is used to cool down the temperature and improve the snowmaking effect. But this patent is more to avoid the adverse effect of high water temperature on snowmaking. Because the cooling of the water to be ejected is too large, it will cause the water to freeze and affect the snowmaking process, so the effect of improving snowmaking is always limited.

In addition, there is also a technology in the prior art that cools the air flow blown by the blower to reduce the temperature of the air flow environment where the fluid is sprayed from the nozzle and the nuclear device, so as to improve the snowmaking effect. However, this method has low utilization efficiency of cooling capacity, and consumes a lot of energy for blower air flow cooling.

Therefore, how to design a snowmaking technology that can improve the snowmaking ability of the snowmaking machine in a positive temperature environment, with low energy consumption and high utilization efficiency of cooling capacity has become a problem to be considered and solved by those skilled in the art.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to provide a kind of low energy consumption, higher utilization efficiency of cooling capacity, which can improve the snowmaking effect of the snow machine in positive temperature environment and is suitable for positive temperature environment. A snowmaking method for a snowmaking machine in a warm environment and a snowmaking machine suitable for a positive temperature environment.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A snowmaking method for snowmaking machines suitable for positive temperature environments. In the snowmaking machine, high-pressure water and high-pressure air are mixed and sprayed out through a nucleator to form snow nuclei with small particle sizes, and then the high-pressure water is sprayed from the nozzle to form a mist After melting and spraying, it combines with the collision of snow nuclei to form snowflakes, and then relies on the air flow blown by the blower to make the snowflakes eject outwards to realize snowmaking. Its temperature is lower than zero degrees Celsius and then mixed with high-pressure water through the nuclear device to form a snow core and ejected.

Like this, in this method, by cooling the high-pressure air, after the high-pressure water and high-pressure air enter the mixing chamber where the nuclear device is located and mix, the temperature of the mixed fluid is greatly reduced. Even if the temperature of the mixed fluid drops under the condition of high pressure and high flow rate, the water component therein will not be frozen, but after the mixed fluid is sprayed out, fine ice slag will be formed rapidly to form snow nuclei under the state of depressurization. This allows both the fluid ejected from the nucleator and the snow cores created to be cooler. After the fluid is sprayed from the snow gun, the temperature will be lowered due to the expansion of the pressure release, so that the temperature of the flow field of the fluid sprayed by the snow gun is lower than zero degrees Celsius. In this way, in the flow field environment below zero degrees Celsius, the snow core with a lower temperature due to pre-cooling can combine with water mist to generate snowflakes more quickly and efficiently. Therefore, the quality and effect of snowmaking are greatly improved, and the snowmaking machine can also have excellent snowmaking effect and snowmaking efficiency in a positive temperature environment (usually 0-1°C). At the same time, because this solution is targeted at cooling the core snow core in the snowflake forming process, not only the snow forming effect is better, but also the utilization efficiency of cooling capacity can be greatly improved; and the way of cooling the air flow of the blower In comparison, not only is the quality of the snow better, but it can also reduce the loss of cooling capacity and improve the utilization efficiency of energy consumed by cooling.

Further, the heat absorbed by cooling the high-pressure air is transported to the outlet end of the snow gun housing for heating.

This is because at the outlet end of the snow gun shell, the temperature in this area is extremely low due to the sudden release and expansion of the fluid ejected from the nozzle and the nuclear device, making it easy for water vapor to freeze here and affect the work. Therefore, the heat absorbed during the high-pressure air cooling process is transferred to this place to increase the temperature of the outlet end of the shell, which can prevent the nozzle or nuclear device outlet from being blocked by freezing at this position and affecting snowmaking. At the same time, the full reuse of heat is better realized. The utilization efficiency of energy consumed for high-pressure air refrigeration is further improved.

Further, the method is realized by means of a snowmaking machine suitable for a positive temperature environment. The snowmaking machine includes a cylindrical shell as a whole, an axial flow fan is installed at the rear end of the shell, and the front end of the shell is installed along the circumferential direction. There are nozzles and nuclear devices arranged in a ring, the water inlet end of the nozzle and the water inlet end of the nuclear device are connected with the high-pressure water system, and the air inlet end of the nuclear device is connected with the air compressor through the gas pipeline; it also includes an air cooling system , the air cooling system is used to cool the air entering the nuclear reactor.

In this way, the above-mentioned snowmaking method can be realized by using the device, making it more suitable for use in a positive temperature environment (mainly referring to 0-1° C.) to realize snowmaking.

Further, the air cooling system includes an airflow converging chamber, the airflow converging chamber is formed on the airflow channel between the nuclear device and the air compressor, and the inner wall of the airflow converging chamber is provided with a semiconductor refrigeration sheet, and the semiconductor refrigeration sheet The cold end of the semiconductor refrigerating sheet is adjacent to the airflow converging chamber, the hot end of the semiconductor refrigeration sheet is adjacent to one end of the heat pipe, and the other end of the heat pipe is connected to the outlet end of the snow gun shell.

In this way, the air is cooled by the semiconductor refrigeration sheet, which has the characteristics of fast response, good cooling effect and small volume. At the same time, the heat from the hot end of the semiconductor refrigeration sheet is transferred to the outlet of the snow gun shell by the heat pipe to heat the area at this location, preventing the nozzle and the outlet of the nuclear device from being blocked by icing at this location and affecting snowmaking. In this way, the heat absorbed by the air cooling is reused, and the utilization efficiency of the energy consumed by the air cooling is improved. Moreover, the above-mentioned structure not only does not have a compressor, but also does not have mechanical refrigeration links such as medium pipelines. It is relatively simple in structure, has the characteristics of no noise during operation, and has low requirements on the working environment.

Further, the heat pipe is a pulsating heat pipe.

The diameter of the pulsating heat pipe is very small (the inner diameter is generally 0.5-3mm). It is bent into a serpentine structure by a metal capillary. One end of the elbow is the heating end, and the other end is the cooling end. In the middle, an insulating section can be arranged as needed. The interior is evacuated and filled with a part of the working liquid, and the working liquid forms liquid columns and air plugs of different lengths in the tube under the action of surface tension. The working liquid is generally water, methanol, ethanol, Freon and so on. Generally, it can be divided into two types: open loop and closed loop. Compared with traditional heat pipes, pulsating heat pipes have the advantages of simple structure and low cost; small volume; high heat flux density without burning out; and can be bent more freely; therefore, it can be more conveniently arranged here, and It can better improve the heat transfer efficiency.

Further, the air cooling system may adopt the following structural form, including a heating box, the heating box is located on the outer surface of the outer shell of the snow gun, the air inlet end of the heating box is connected to the air pipeline of the air compressor, and the air outlet end It is connected with the airflow channel connected to the nuclear device on the shell, and the inner cavity of the heating box constitutes the airflow converging chamber, and the semiconductor refrigeration sheet is arranged on the inner wall around the heating box (up, down, left, and right), and the inner side of the semiconductor refrigeration sheet is the cold end The outer side is the hot end, and the outer side of the semiconductor refrigeration sheet is wound along the circumferential direction of the heating box with multiple pulsating heat pipes. The pulsating heat pipes are arranged side by side along the airflow direction inside the heating box and face the outer side of the heating box near the snow gun shell. The middle parts of the outer surfaces converge to form a tube bundle, and the tube bundle is wound in a circle of tube bundle installation grooves on the back side of the lip of the outlet end of the snow gun shell so that each pulsating heat pipe independently forms a circulation.

In this way, after the air enters the heating box, it is cooled and heat-exchanged by the semiconductor refrigeration sheets around it in the heating box, and then enters the nuclear device in the shell to mix with high-pressure water to reduce the temperature of the snow core and improve the snowmaking effect. At the same time, the heat obtained by the heat exchange of the heating box is transferred to the outlet end of the snow gun shell through the multiple pulsating heat pipes wound around the heating box in the circumferential direction, relying on the converged tube bundle, to heat the place to prevent freezing. In this way, the structure can not only cool the air to improve the snowmaking effect, but also can use the heat of heat exchange to heat the outlet end of the casing to avoid freezing; it also has the characteristics of a relatively simple implementation structure and is convenient for implementation. This scheme can be conveniently and directly transformed and realized on the existing snow making machine.

Further, a layer of heat insulating material is wrapped on the heating box outside the pulsating heat pipe, and a heat conducting material is filled between the inside of the heat insulating material and the semiconducting cooling sheet, and the part outside the heating box of the pulsating heat pipe winding device is located in the heat conducting material.

In this way, it is more convenient for the heat at the hot end of the semiconductor cooling chip to be fully absorbed by the pulsating heat pipe, so as to avoid heat dissipation and waste.

Further, the thermally conductive material is thermally conductive silica gel, and the thermally insulating material is foamed porous material.

This has better heat conduction effect and heat insulation effect.

Further, in the heating box, there are a plurality of cold-conducting aluminum plates arranged at intervals along the length direction along the cross-sectional direction of the airflow channel. The surrounding cold-conducting aluminum plates are attached and fixed on the inner surface of the semiconductor refrigeration sheet as the cold end. Half of the area of each cold-conducting aluminum plate is There are air-passing areas formed by air-passing holes evenly distributed on the top, the total area of the air-passing holes on the air-passing area of each cooling-conducting aluminum plate is consistent with the size of the inner cross-section of the gas pipeline of the air compressor, and the air-passing areas of adjacent cooling-conducting aluminum plates are misaligned set up.

In this way, the structure of the cold-conducting aluminum plate can avoid the sudden change of the cross-section of the gas pipeline caused by the addition of a heating box (the air flow area will suddenly increase when the air enters the heating box, and the air flow area will suddenly decrease when it flows out of the heating box). The impact of transportation; the second is to greatly increase the contact area between the airflow and the heating box to achieve cold and heat exchange; the third is to prolong the contact time between the airflow and the heating box to achieve cold and heat exchange. Therefore, the heat exchange effect of the heating box can be improved to the greatest extent on the premise of minimizing the influence of the setting of the heating box on the airflow transmission, and the cooling effect on the airflow is improved.

Further, the air cooling system can also adopt the following structural form, including an air collection groove arranged in a closed ring on the casing, the air collection groove is arranged at the adjacent position of the air supply groove on the casing near the outlet side, and the air collection groove The outlet of the gas collection tank is arranged on the top to communicate with the gas supply tank. The gas supply tank is respectively provided with the corresponding outlet of the gas supply tank to communicate with each nuclear device. The gas collection tank is provided with the inlet of the gas collection tank and the air compressor. The inner cavity of the gas collection tank constitutes the air flow converging chamber, the side of the gas collection tank away from the direction of the air supply tank is provided with a heating side inner wall surface, and a ring is arranged on the heating side inner wall surface Said semi-conductor refrigerating sheet, between the area where the outer hot end of the semi-conductor refrigerating sheet is located and the lip area of the outlet end of the outer casing is meandering back and forth, and at least one said pulsating heat pipe is arranged around the outer circumferential direction of the outer casing as a whole.

In this way, before the air enters the air supply tank, it first enters the air collecting tank and is cooled and exchanged by the semiconductor refrigeration sheet inside, and then enters the nuclear device through the air supply tank to reduce the temperature of the snow core and improve the snowmaking effect. At the same time, the heat obtained by the hot end of the outer surface of the semiconductor refrigeration sheet is directly transferred to the lip area of the outlet end of the shell through the pulsating heat pipe that is wound back and forth to heat the area to prevent freezing. Each twist of the pulsating heat pipe can form two heat exchange passages between the area where the outer surface of the semiconducting cooling plate is located and the lip area of the outlet end of the shell. In this way, the structure can not only cool the air to improve the snowmaking effect, but also use the heat of heat exchange to heat the outlet end of the shell to avoid freezing; it also has a small number of pulsating heat pipes, and the heating effect on the heating area is very uniform and reliable. The heat exchange efficiency is very efficient and stable. This solution is more suitable for design, manufacture and implementation in new products of snow guns. In addition, in this plan, a gas collecting tank parallel to the gas supply tank is separately set up to form an air flow converging chamber for heat exchange, so that the heat exchange process will not affect the gas supply from the gas supply tank to each nuclear device, ensuring that the nuclear normal operation of the device.

Further, a plurality of pulsating heat pipes are arranged side by side along the cross-sectional direction of the central axis of the housing. In this way, heat exchange efficiency can be improved.

Further, the inlet of the gas collection tank and the outlet of the gas collection tank are located at both ends in the diameter direction of the gas collection tank.

In this way, an airflow channel can be formed on the entire ring of the air collecting tank to realize cooling, improve the cooling effect and ensure the uniformity of cooling in all places in the circumferential direction. Further, heat pipes arranged zigzag back and forth can be used to evenly exchange heat to the lip position of the entire circumference of the outlet end of the casing at all locations in the circumference of the air collecting tank, ensuring the uniformity and reliability of the heat supply effect in the circumference direction.

Further, the cross section of the air collecting groove is arranged in a triangular shape.

In this way, the outer hot end of the semiconductor cooling plate is just set up against the lip area of the outlet end of the casing, which can facilitate the arrangement of the pulsating heat pipe and facilitate heat transfer.

Further, a layer of heat insulating material is arranged outside the pulsating heat pipe between the outer hot end of the semiconductive cooling plate and the lip area of the outlet end of the shell.

In this way, the hot and cold middle of the heat pipe can be shielded from relying on the heat transfer of the shell medium to cause heat to diffuse to other areas, which can better ensure the heating effect of the heat pipe on the lip position of the outlet end of the shell. The heat insulation material can be made of porous foam material.

Further, cooling guide sheets made of aluminum are arranged at intervals in the air collecting tank, and one side of the cooling guide sheet and the semiconductor refrigeration sheet are fixed as the inner surface of the cold end. Air holes are distributed on the cooling guide sheet, and the air holes The size of the total area is consistent with the size of the internal section of the gas pipeline of the air compressor.

In this way, the cooling fins can increase the heat transfer area, better assist in realizing the heat transfer between the air and the semiconductor cooling fins, and improve the cooling effect on the air. At the same time, the size of the air hole area is properly set, so that the air collecting tank is equivalent to only extending the length of the gas transmission pipeline, and will not have too much influence on the air transmission effect.

Therefore, the above scheme has the following characteristics: 1. Since the working medium of semiconductor refrigeration (thermoelectric refrigeration) is the carrier conducted in solid materials, it has no compressor, no mechanical refrigeration links such as medium pipelines, and is relatively simple in structure. There is no noise when working, and the requirements for the working environment are low. 2 There is no chemical refrigerant and no other harmful substances are released, so there is no environmental pollution and it is clean and hygienic. 3. The energy regulation performance is good. By changing the size of the working current to adjust the cooling speed and cooling temperature, it is easy to achieve high-precision temperature control. 4 The thermal inertia of thermoelectric cooling is very small, and the response time of cooling and heating is small, which is conducive to rapid heat dissipation. 5. The heat pipe is used to realize heat exchange, the structure is simple, compact and reliable, and two specific structural methods are designed to realize heat exchange, which can be flexibly implemented according to needs.

To sum up, the present invention can improve the snowmaking effect of the snowmaking machine in a positive temperature environment, and has the advantages of lower energy consumption and higher utilization efficiency of cooling capacity.

Description of drawings

Fig. 1 is the structural representation of the snow making machine that adopts when the present invention implements.

Fig. 2 is a schematic structural view of the individual heating box in Fig. 1 .

Fig. 3 is a schematic cross-sectional structure diagram of Fig. 2 at the position of the tube bundle.

Fig. 4 is a schematic diagram showing the arrangement of the pulsating heat pipes on the upper surface of the heating box in Fig. 2 alone.

FIG. 5 is a schematic diagram of the layout of the internal cooling aluminum plate in FIG. 2 .

Fig. 6 is a schematic cross-sectional structure diagram of an outlet end of a snow gun housing of an air cooling system embodying another embodiment of the present invention.

Fig. 7 is a schematic diagram showing the air cooling system after placing you at the lower section of the individual housing in Fig. 6 .

FIG. 8 is a schematic diagram showing the arrangement of the pulsating heat pipes in the circumferential direction in FIG. 6 alone.

FIG. 9 is a schematic diagram of the flattened pulsating heat pipe in FIG. 6 , in which the pulsating heat pipe is represented by lines.

Detailed ways

The present invention will be further described in detail below in combination with specific embodiments.

Specific implementation method: a snowmaking method suitable for a positive temperature environment. In the snowmaking machine, high-pressure water and high-pressure air are mixed and then sprayed out through a nucleator to form small-sized snow nuclei, and then the high-pressure water After being atomized and ejected from the nozzle, it is combined with the impact of the snow core to form snowflakes, and then the snowflakes are sprayed out by the wind blown by the blower to realize snowmaking. Perform pre-cooling to lower the temperature so that its temperature is lower than zero degrees Celsius, and then pass through the nucleator and high-pressure water to mix and form a snow nucleus to be ejected.

Like this, in this method, by cooling the high-pressure air, after the high-pressure water and high-pressure air enter the mixing chamber where the nuclear device is located and mix, the temperature of the mixed fluid is greatly reduced. Even if the temperature of the mixed fluid drops under the condition of high pressure and high flow rate, the water component therein will not be frozen, but after the mixed fluid is sprayed out, fine ice slag will be formed rapidly to form snow nuclei under the state of depressurization. This allows both the fluid ejected from the nucleator and the snow cores created to be cooler. After the fluid is sprayed from the snow gun, the temperature will be lowered due to the expansion of the pressure release, so that the temperature of the flow field of the fluid sprayed by the snow gun is lower than zero degrees Celsius. In this way, in the flow field environment below zero degrees Celsius, the snow core with a lower temperature due to pre-cooling can combine with water mist to generate snowflakes more quickly and efficiently. Therefore, the quality and effect of snowmaking are greatly improved, and the snowmaking machine can also have excellent snowmaking effect and snowmaking efficiency in a positive temperature environment (usually 0-1°C). At the same time, because this solution is targeted at cooling the core snow core in the snowflake forming process, not only the snow forming effect is better, but also the utilization efficiency of cooling capacity can be greatly improved; and the way of cooling the air flow of the blower In comparison, not only is the quality of the snow better, but it can also reduce the loss of cooling capacity and improve the utilization efficiency of energy consumed by cooling.

Wherein, the heat absorbed by cooling the high-pressure air is transported to the outlet end of the snow gun housing for heating.

This is because at the outlet end of the snow gun shell, the temperature in this area is extremely low due to the sudden release and expansion of the fluid ejected from the nozzle and the nuclear device, making it easy for water vapor to freeze here and affect the work. Therefore, the heat absorbed during the high-pressure air cooling process is transferred to this place to increase the temperature of the outlet end of the shell, which can prevent the nozzle or nuclear device outlet from being blocked by freezing at this position and affecting snowmaking. At the same time, the full reuse of heat is better realized. The utilization efficiency of energy consumed for high-pressure air refrigeration is further improved.

In this embodiment, this method can be realized by means of a snowmaking machine suitable for a positive temperature environment as shown in Figures 1-5. The snowmaking machine includes a cylindrical casing 1 as a whole, and an axial flow type The front end of the casing 1 is equipped with circularly arranged nozzles and nuclear devices along the circumferential direction. The water inlet ends of the nozzles and the nuclear devices are connected to the high-pressure water system (not shown in the figure), and the inlets of the nuclear devices The gas end is connected to the air compressor 4 through the gas pipeline 3; it also includes an air cooling system, which is used to cool the air entering the nuclear device.

In this way, the above-mentioned snowmaking method can be realized by using the device, making it more suitable for use in a positive temperature environment (mainly referring to 0-1° C.) to realize snowmaking.

Wherein, the air cooling system includes an airflow converging chamber, the airflow converging chamber is formed on the airflow channel between the nuclear device and the air compressor, and the inner wall of the airflow converging chamber is provided with a semiconductor refrigeration sheet, and the semiconductor refrigeration sheet The cold end is adjacent to the airflow converging chamber, the hot end of the semiconductor refrigeration sheet is adjacent to one end of the heat pipe, and the other end of the heat pipe is connected to the outlet end of the snow gun shell.

In this way, the air is cooled by the semiconductor refrigeration sheet, which has the characteristics of fast response, good cooling effect and small size. At the same time, the heat from the hot end of the semiconductor refrigeration sheet is transferred to the outlet of the snow gun shell by the heat pipe to heat the area at this location, preventing the nozzle and the outlet of the nuclear device from being blocked by icing at this location and affecting snowmaking. In this way, the heat absorbed by the air cooling is reused, and the utilization efficiency of the energy consumed by the air cooling is improved. Moreover, the above-mentioned structure not only does not have a compressor, but also does not have mechanical refrigeration links such as medium pipelines. It is relatively simple in structure, has the characteristics of no noise during operation, and has low requirements on the working environment.

Wherein, the heat pipe is a pulsating heat pipe.

The diameter of the pulsating heat pipe is very small (the inner diameter is generally 0.5-3mm). It is bent into a serpentine structure by a metal capillary. One end of the elbow is the heating end, and the other end is the cooling end. In the middle, an insulating section can be arranged as needed. The interior is evacuated and filled with a part of the working liquid, and the working liquid forms liquid columns and air plugs of different lengths in the tube under the action of surface tension. The working liquid is generally water, methanol, ethanol, Freon and so on. Generally, it can be divided into two types: open loop and closed loop. Compared with traditional heat pipes, pulsating heat pipes have the advantages of simple structure and low cost; small volume; high heat flux density without burning out; and can be bent more freely; therefore, it can be more conveniently arranged here, and It can better improve the heat transfer efficiency.

Wherein, the air cooling system can adopt the following structural forms, see Fig. 1-5, including a heating box 5, the heating box 5 is located on the outer surface of the snow machine at the outlet end of the shell, the heating box 5 inlet and the air compressor The gas pipeline 3 is connected to each other, and the gas outlet is connected to the air flow channel connected to the nuclear device on the shell 1. The inner cavity of the heating box 5 constitutes the air flow converging chamber. The semiconductor refrigerating sheet 6 is described. The inner side of the semiconductor refrigerating sheet 6 is the cold end and the outer side is the hot end. The outer side of the semiconductor refrigerating sheet is wound with a plurality of pulsating heat pipes 7 along the circumferential direction of the heating box, and each pulsating heat pipe 7 is arranged side by side along the airflow direction inside the heating box. The cloth is assembled in the middle of the outer surface of the side of the heating box close to the snow gun shell, and then the tube bundle 8 is formed, and the tube bundle 8 is wound around a circle of tube bundle installation grooves on the back side of the lip of the snow gun shell 1. and make each pulsating heat pipe independently form a circulation.

In this way, after the air enters the heating box, it is cooled and heat-exchanged by the semiconductor refrigeration sheets around it in the heating box, and then enters the nuclear device in the shell to mix with high-pressure water to reduce the temperature of the snow core and improve the snowmaking effect. At the same time, the heat obtained by the heat exchange of the heating box is transferred to the outlet end of the snow gun shell through the multiple pulsating heat pipes wound around the heating box in the circumferential direction, relying on the converged tube bundle, to heat the place to prevent freezing. In this way, the structure can not only cool the air to improve the snowmaking effect, but also can use the heat of heat exchange to heat the outlet end of the casing to avoid freezing; it also has the characteristics of a relatively simple implementation structure and is convenient for implementation. This scheme can be conveniently and directly transformed and realized on the existing snow making machine.

Wherein, the heating box 5 is located outside the pulsating heat pipe 7 and is also wrapped with a layer of heat insulating material 9, and the inside of the heat insulating material 9 and the semiconductor refrigeration sheet are also filled with a heat conducting material 10, and the part outside the heating box of the pulsating heat pipe winding device is located inside the thermally conductive material.

In this way, it is more convenient for the heat at the hot end of the semiconductor cooling chip to be fully absorbed by the pulsating heat pipe, so as to avoid heat dissipation and waste.

Wherein, the heat conduction material is heat conduction silica gel, and the heat insulation material is foamed porous material.

This has better heat conduction effect and heat insulation effect.

Among them, in the heating box, there are a plurality of cold-conducting aluminum plates 11 arranged at intervals along the length direction along the direction of the cross-section of the airflow channel. The area is evenly distributed with the air-passing area formed by the air-passing holes. The total area of the air-passing holes on the air-passing area of each cold-conducting aluminum plate 11 is consistent with the cross-sectional size of the air pipeline of the air compressor. The air-passing area of the adjacent cold-conducting aluminum plate 11 Mutually misplaced settings.

In this way, the structure of the cold-conducting aluminum plate can avoid the sudden change of the cross-section of the gas pipeline caused by the addition of a heating box (the air flow area will suddenly increase when the air enters the heating box, and the air flow area will suddenly decrease when it flows out of the heating box). The impact of transportation; the second is to greatly increase the contact area between the airflow and the heating box to achieve cold and heat exchange; the third is to prolong the contact time between the airflow and the heating box to achieve cold and heat exchange. Therefore, the heat exchange effect of the heating box can be improved to the greatest extent on the premise of minimizing the influence of the setting of the heating box on the airflow transmission, and the cooling effect on the airflow is improved.

As another embodiment, the air cooling system can also adopt the structure shown in Figures 6-9, including an air collection groove 12 arranged in a closed ring on the casing, and the air collection groove 12 is arranged on the air supply groove on the casing 13 is close to the adjacent position of the outlet side, the gas collecting tank 12 is provided with the outlet of the gas collecting tank and communicates with the gas supply tank 13, and the gas supply tank 13 is respectively provided with a corresponding gas supply tank outlet for each nuclear device to communicate with each nuclear device, The gas-collecting tank 12 is provided with an inlet of the gas-collecting tank connected with the air pipeline of the air compressor. The inner cavity of the gas-collecting tank 12 constitutes the air flow converging chamber, and the gas-collecting tank 12 is set on the side away from the direction of the air supply tank. There is an inner wall surface on the heating side, and a circle of semiconductor cooling chips 6 is arranged adjacent to the inner wall surface of the heating side. The area where the outer hot end of the semiconductor cooling chip 6 is located and the lip area of the outlet end of the shell meander back and forth and are arranged around the circumference of the shell as a whole. There is at least one pulsating heat pipe 7 .

In this way, before the air enters the air supply tank, it first enters the air collecting tank and is cooled and exchanged by the semiconductor refrigeration sheet inside, and then enters the nuclear device through the air supply tank to reduce the temperature of the snow core and improve the snowmaking effect. At the same time, the heat obtained by the hot end of the outer surface of the semiconductor refrigeration sheet is directly transferred to the lip area of the outlet end of the shell through the pulsating heat pipe that is wound back and forth to heat the area to prevent freezing. Each twist of the pulsating heat pipe can form two heat exchange passages between the area where the outer surface of the semiconducting cooling plate is located and the lip area of the outlet end of the shell. In this way, the structure can not only cool the air to improve the snowmaking effect, but also use the heat of heat exchange to heat the outlet end of the shell to avoid freezing; it also has a small number of pulsating heat pipes, and the heating effect on the heating area is very uniform and reliable. The heat exchange efficiency is very efficient and stable. This solution is more suitable for design, manufacture and implementation in new products of snow guns. In addition, in this plan, a gas collecting tank parallel to the gas supply tank is separately set up to form an air flow converging chamber for heat exchange, so that the heat exchange process will not affect the gas supply from the gas supply tank to each nuclear device, ensuring that the nuclear normal operation of the device.

Wherein, the pulsating heat pipes 7 are multiple arranged side by side along the section direction of the central axis of the housing. In this way, heat exchange efficiency can be improved. In this embodiment, there are three pulsating heat pipes 7 .

Wherein, the inlet of the gas collection tank and the outlet of the gas collection tank are located at both ends of the gas collection tank 12 in the diameter direction.

In this way, an airflow channel can be formed on the entire ring of the air collecting tank to realize cooling, improve the cooling effect and ensure the uniformity of cooling in all places in the circumferential direction. Further, heat pipes arranged zigzag back and forth can be used to evenly exchange heat to the lip position of the entire circumference of the outlet end of the casing at all locations in the circumference of the air collecting tank, ensuring the uniformity and reliability of the heat supply effect in the circumference direction.

Wherein, the cross section of the gas collecting tank 12 is arranged in a triangular shape.

In this way, the outer hot end of the semiconductor cooling plate is just set up against the lip area of the outlet end of the casing, which can facilitate the arrangement of the pulsating heat pipe and facilitate heat transfer.

Wherein, the outside of the pulsating heat pipe 7 is located between the outer hot end of the semiconductor cooling chip and the lip area of the outlet end of the casing, and a layer of heat insulating material 14 is arranged separately.

In this way, the hot and cold middle of the heat pipe can be shielded from relying on the heat transfer of the shell medium to cause heat to diffuse to other areas, which can better ensure the heating effect of the heat pipe on the lip position of the outlet end of the shell. The heat insulation material can be made of porous foam material.

Among them, the cold guide plate 15 made of aluminum is arranged at intervals in the air collecting tank, and one side of the cold guide plate 15 is fixed to the inner surface of the semiconductor cooling plate as the cold end, and the cooling plate 15 is distributed with air holes. , the total area of the air holes is the same as the size of the inner cross-section of the gas pipeline of the air compressor.

In this way, the cooling fins can increase the heat transfer area, better assist in realizing the heat transfer between the air and the semiconductor cooling fins, and improve the cooling effect on the air. At the same time, the size of the air hole area is properly set, so that the air collecting tank is equivalent to only extending the length of the gas transmission pipeline, and will not have too much influence on the air transmission effect.

Claims (9)

1. A snowmaking machine suitable for a positive temperature environment, comprising a cylindrical casing as a whole, an axial flow fan is installed at the rear end of the casing, and annular nozzles and nuclei are installed at the front end of the casing along the circumferential direction, The water inlet end of the nozzle and the water inlet end of the nuclear device are connected with the high-pressure water system, and the air inlet end of the nuclear device is connected with the air compressor through the air pipeline; it is characterized in that it also includes an air cooling system, and the air cooling system is used for Cooling the air entering the nuclear reactor; The air cooling system includes an airflow converging chamber, the airflow converging chamber is formed on the airflow channel between the nuclear device and the air compressor, the inner wall of the airflow converging chamber is provided with a semiconductor cooling chip, and the cold end of the semiconductor cooling chip Adjacent to the airflow converging chamber, the hot end of the semiconductive cooling sheet is adjacent to one end of the heat pipe, and the other end of the heat pipe is connected to the outlet end of the snow gun shell. 2. The snow gun suitable for a positive temperature environment according to claim 1, wherein the heat pipe is a pulsating heat pipe. 3. The snow gun suitable for a positive temperature environment as claimed in claim 2, wherein the air cooling system includes a heating box, the heating box is located on the outer surface of the snow gun at the outlet end of the shell, and the heating box The air inlet end is connected to the air pipeline of the air compressor, the air outlet end is connected to the air flow channel connected to the nuclear device on the shell, the inner cavity of the heating box constitutes the air flow converging chamber, and the surrounding walls of the heating box are provided with the said Semiconductor refrigerating sheet, the inner side of the semiconductor refrigerating sheet is the cold end and the outer side is the hot end, and the outer side of the semiconductor refrigerating sheet is wound with a plurality of pulsating heat pipes along the circumference of the heating box. The outer surface of the side close to the snow gun housing is converged at the middle of the outer surface of this side and then fitted together to form a tube bundle. The tube bundle is wound in a circle of tube bundle installation grooves on the back side of the lip of the snow gun housing outlet and makes each pulsating heat pipe uniform independent cycle. 4. The snowmaking machine suitable for a positive temperature environment as claimed in claim 3, characterized in that, the heating box is located outside the pulsating heat pipe and is also wrapped with a layer of heat insulating material, and there is a layer of heat insulating material between the inside of the heat insulating material and the semiconductor refrigeration sheet. The filling is provided with a heat-conducting material, and the part outside the heating box of the pulsating heat pipe winding device is located in the heat-conducting material. 5 . The snow gun suitable for a positive temperature environment as claimed in claim 4 , wherein the heat-conducting material is heat-conducting silica gel, and the heat-insulating material is foamed porous material. 6 . 6. The snowmaking machine suitable for a positive temperature environment as claimed in claim 3, wherein a plurality of cold-conducting aluminum plates arranged at intervals along the length direction in the heating box are arranged along the section direction of the airflow channel, and the surroundings of the cold-conducting aluminum plates are It is attached and fixed on the inner surface of the semiconductor cooling plate as the cold end. Half of the area of each cold-conducting aluminum plate is evenly distributed with an air-passing area composed of air-passing holes. The size of the cross-section of the gas pipeline is the same, and the gas-passing areas of adjacent cold-conducting aluminum plates are misplaced. 7. The snowmaking machine suitable for a positive temperature environment according to claim 2, wherein the air cooling system comprises an air collection groove arranged in a closed ring on the casing, and the air collection groove is arranged on the casing The gas supply tank is adjacent to the outlet side, the gas collection tank is provided with an outlet of the gas collection tank to communicate with the gas supply tank, and the gas supply tank is respectively provided with a corresponding gas supply tank outlet to communicate with each nuclear device. The gas collection tank is provided with an inlet of the gas collection tank connected to the air pipeline of the air compressor, the inner cavity of the gas collection tank constitutes the air flow converging chamber, and the side of the gas collection tank facing away from the direction of the air supply tank is provided with a heating On the inner wall surface of the side, a circle of the semiconductor refrigeration sheet is arranged adjacent to the inner wall surface of the heating side, and there is at least one ring arranged around the circumference of the casing as a whole between the area where the hot end of the semiconductor refrigeration sheet is located and the lip area of the outlet end of the casing. root the pulsating heat pipe. 8. The snow gun suitable for positive temperature environment according to claim 7, characterized in that, the pulsating heat pipes are multiple arranged side by side along the section direction of the central axis of the casing; The inlet and outlet of the gas collection tank are located at both ends of the gas collection tank in the diameter direction; The cross-section of the air collecting tank is arranged in a triangular shape; the outside of the pulsating heat pipe is located between the outer hot end of the semiconductor refrigeration sheet and the lip area of the outlet end of the shell, and a layer of heat insulating material is arranged separately. 9. The snowmaking machine suitable for a positive temperature environment as claimed in claim 8, characterized in that, the air collecting tank is arranged with cold guide sheets made of aluminum at intervals, one side of the cold guide sheet and the semiconductor refrigeration sheet As the inner surface of the cold end is bonded and fixed, air holes are distributed on the cooling plate, and the total area of the air holes is the same as the size of the inner cross-section of the gas pipeline of the air compressor.

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