Underground mine refrigerating system

Abstract

The utility model discloses an underground mine refrigerating system which comprises a first chamber, a first refrigerating device, a second refrigerating device, a first pipe and an air conveying device, the first chamber is arranged underground, the first refrigerating device is arranged on the ground, and the second refrigerating device is arranged underground. The first pipe is connected between the first refrigerating device and the second refrigerating device, so that the refrigerant medium circularly flows between the first refrigerating device and the second refrigerating device, the second refrigerating device is connected with the first chamber, and the first refrigerating device cools the refrigerant medium conveyed to the ground by the second refrigerating device and then sends the cooled refrigerant medium to the second chamber. The air is conveyed to the second refrigerating device to cool the air in the first chamber; the air conveying device is connected with the first chamber so as to convey cooled air in the first chamber to an underground target area. The refrigeration efficiency can be improved, and the influence of heat damage can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine tunneling, and particularly relates to an underground mine refrigeration system. Background Art

[0002] As the shallow surface resources are increasingly exhausted, more and more mines have started to shift to deep mining below one thousand meters. The geothermal gradient in the mining area is generally between 1.5 and 2.5 °C / 100 m. With the increase of the mining depth, the problem of high geothermal heat damage has become an important problem faced in the deep mining of mines. Especially, the heat damage problems faced in the driving and stoping operations of deep dead-end roadways will become more prominent, which not only affects the safety and health of workers, resulting in heatstroke and coma symptoms, but also slows down the progress of the project and significantly reduces the operation efficiency. Content of the Utility Model

[0003] The utility model is made based on the inventor's discovery and understanding of the following facts and problems:

[0004] The inventor realizes that in the related technology, increasing the air volume and wind speed is adopted to take away the heat of the underground working face, but it is not applicable to the mining of deep ore bodies more than 1000 m. With the increase of the mining depth, the geothermal temperature in the deep part reaches 40 - 50 °C. The air volume transported to the deep driving face or stope is positively correlated with the working face temperature. The larger the air volume, the higher the air temperature, which is more likely to cause the appearance of heat damage problems in the dead-end driving working face.

[0005] The inventor also realizes that in the related technology, a refrigeration station is built on the surface, and the refrigerated cold air or cold water is transported into the underground working face. However, the cold air needs to be transported by an air duct, and the cooling capacity is limited. The cold air will increase by 0.5 to 0.8 °C / 100 m in the air duct, and the cooling air volume of the air duct is generally 5 to 10 m3 / s, and the air supply volume cannot be flexibly adjusted according to the needs of the underground working face. After the cold water is transported into the underground, a decompression water pool needs to be set up underground (generally one is set every 400 m depth interval). After the cold water absorbs heat, it also needs to be pumped to the surface by a water pump, which increases the burden on the mine underground drainage system and increases the power consumption of the mine.

[0006] The inventor also realizes that in the related technology, a refrigeration station is set up underground. After the fresh air flow or cold water is refrigerated in the underground section, the cold source is transported to the section working face by using a local fan and an air duct, or a water pipeline and an air cooler. Although the pipeline investment in the shaft is reduced and the loss of cold quantity in the one-thousand-meter air duct or pipeline is avoided, since the condenser and cooling tower are placed underground, especially when there is no through-flow ventilation system in the dead-end roadway or the infrastructure mine, the heat generated by the condenser cannot be effectively discharged, and the underground heat damage is more prominent. If a water-cooled unit is used, cooling water also needs to be transported from the surface to the underground to absorb the condensation heat, and the problems of increasing the mine drainage system and power consumption are also faced.

[0007] The inventors also recognized that building an ice-making station on the ground surface to make ice cubes from cold water. Ice cubes can carry a large amount of cold energy compared to cold water and cold air. The ice cubes are transported to the underground through pipes laid in the shaft and then melted into ice water in the ice-melting pools at each underground level. The ice water is transported through pipes to the air-coolers at the tunneling face to output cold air, thereby reducing the temperature of the working face. However, this method has a large capital investment, a large number of equipment, and complex management procedures, and is mainly applied to mines more than 2000m deep.

[0008] The present utility model aims to solve at least one of the technical problems in the related art to some extent.

[0009] To this end, an embodiment of the present utility model provides an underground mine refrigeration system that can improve the refrigeration efficiency and reduce the impact of heat damage problems.

[0010] The underground mine refrigeration system according to the embodiment of the present utility model includes:

[0011] A first chamber disposed underground;

[0012] A first refrigeration device and a second refrigeration device, the first refrigeration device is disposed on the ground, and the second refrigeration device is disposed underground;

[0013] A first pipe connecting the first refrigeration device and the second refrigeration device to enable the refrigerant medium to circulate between the first refrigeration device and the second refrigeration device. The second refrigeration device is connected to the first chamber. After the first refrigeration device cools down the refrigerant medium transported to the ground by the second refrigeration device, it is then transported back to the second refrigeration device to cool the air in the first chamber;

[0014] An air delivery device connected to the first chamber to deliver the cooled air in the first chamber to a target area underground.

[0015] The embodiment of the present utility model can improve the refrigeration efficiency and reduce the impact of heat damage problems.

[0016] In some embodiments, the first refrigeration device includes a condenser, and the second refrigeration device includes an evaporator.

[0017] In some embodiments, a cooling tower is further included, which is disposed on the ground and connected to the condenser to cool the refrigerant medium flowing through the condenser;

[0018] And / or, the first refrigeration device further includes a first compressor connected to the inlet end of the condenser;

[0019] And / or, the first refrigeration device further includes an expansion valve and a subcooler. The expansion valve and the subcooler are connected to the outlet end of the condenser. The liquid-phase outlet of the subcooler is connected to the inlet end of the evaporator, and the gas-phase outlet of the subcooler is connected to the inlet end of the condenser.

[0020] In some embodiments, the second refrigeration device further includes a second compressor, and the second compressor is connected to the outlet end of the evaporator;

[0021] And / or, the second refrigeration device further includes an energy dissipation component. The energy dissipation component is connected to the inlet end of the evaporator, and the energy dissipation component is used to reduce the energy of the refrigerant medium when it enters the evaporator;

[0022] And / or, the second refrigeration device further includes a pressure reducing component. The pressure reducing component is connected to the inlet end of the evaporator, and the pressure reducing component is used to reduce the pressure of the refrigerant medium at the inlet end of the evaporator.

[0023] In some embodiments, the first pipe includes a downward pipe and an upward pipe. The downward pipe is connected between the inlet end of the evaporator and the outlet end of the condenser, and the upward pipe is connected between the outlet end of the evaporator and the inlet end of the condenser.

[0024] In some embodiments, the refrigerant medium in the downward pipe is liquid, and the refrigerant medium in the upward pipe is gas;

[0025] And / or, both the downward pipe and the upward pipe are heat-insulating pipes, or heat-insulating sleeves are provided on the outer sides of the downward pipe and the upward pipe.

[0026] In some embodiments, the air delivery device includes a first fan and an air delivery pipe connected to each other. The air inlet end of the air delivery pipe is communicated with the first chamber, and the air outlet end of the air delivery pipe extends to a target area underground.

[0027] In some embodiments, the air delivery device further includes a second fan and a return air pipe connected to each other. The air inlet end of the return air pipe is located in the target area, and the air outlet end of the return air pipe is communicated with the first chamber.

[0028] In some embodiments, the air delivery device further includes a purification component. The purification component is connected to the return air pipe, and the purification component is used to purify the gas in the return air pipe;

[0029] And / or, a partition wall is provided in the first chamber. The partition wall divides the first chamber into a communicating air inlet chamber and a return air chamber. The return air pipe is communicated with the return air chamber, and the air delivery pipe is communicated with the air inlet chamber;

[0030] And / or, the first chamber has a windshield.

[0031] In some embodiments, a third fan is further included, and the third fan is configured to convey surface air into the ground;

[0032] And / or, the first chamber is a chamber arranged underground;

[0033] And / or, a control system is further included, and the control system is connected to the first refrigeration device, the second refrigeration device, and the air delivery device to control the operations of the first refrigeration device, the second refrigeration device, and the air delivery device. Description of the Drawings

[0034] Figure 1 is a schematic structural diagram of the underground mine refrigeration system according to an embodiment of the present invention.

[0035] Reference Signs:

[0036] 1, first chamber; 11, partition wall; 12, windshield;

[0037] 2, first refrigeration device; 21, condenser; 22, first compressor; 23, expansion valve; 24, subcooler;

[0038] 3, second refrigeration device; 31, evaporator; 32, second compressor; 33, energy dissipation component; 34, pressure reducing component;

[0039] 4, first pipe; 41, downward pipe; 42, upward pipe;

[0040] 5, cooling tower; 51, cooling water pump; 52, valve;

[0041] 6, air delivery device; 61, first fan; 62, air supply pipe; 63, second fan; 64, return air pipe; 65, purification component;

[0042] 7, third fan; 71, fresh air;

[0043] 8, shaft / borehole;

[0044] 9, tunneling face. Detailed Description of the Embodiments

[0045] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0046] The following will be combined with Figure 1 to give a detailed description of the underground mine refrigeration system according to the embodiments of the present invention.

[0047] As Figure 1 shown, the underground mine refrigeration system of the embodiment of the present utility model includes a first chamber 1, a first refrigeration device 2, a second refrigeration device 3, a first pipe 4, and an air delivery device 6.

[0048] The first chamber 1 is arranged underground, the first refrigeration device 2 is arranged on the ground, the second refrigeration device 3 is arranged underground, the first pipe 4 is connected between the first refrigeration device 2 and the second refrigeration device 3 to enable the refrigerant medium to circulate between the first refrigeration device 2 and the second refrigeration device 3. The second refrigeration device 3 is connected to the first chamber 1. After the first refrigeration device 2 cools down the refrigerant medium transported from the second refrigeration device 3 to the ground, it is then transported to the second refrigeration device 3 to cool the air in the first chamber 1; the air delivery device 6 is connected to the first chamber 1 to transport the cooled air in the first chamber 1 to the target area underground.

[0049] It should be understood that the refrigerant medium can circulate between the first refrigeration device 2 and the second refrigeration device 3. The refrigerant medium is cooled down in the first refrigeration device 2 and then transported into the second refrigeration device 3 underground to cool the air in the first chamber 1. The refrigerant medium in the second refrigeration device 3 after absorbing heat is transported to the first refrigeration device 2 on the ground and is cooled down again, thus realizing the circulation of the refrigerant medium.

[0050] The refrigerant medium can carry more cold capacity compared with cold air and cold water, improving the cold-carrying capacity. When the refrigerant medium is cooled down in the first refrigeration device 2, a large amount of condensation heat generated during refrigeration can be directly released into the ground air, avoiding the generation of new heat sources underground.

[0051] The target area underground includes the working face of the underground roadway. For example, the driving working face 9 of the dead-end roadway.

[0052] In some embodiments, the first pipe 4 in the embodiment of the present utility model includes a downward pipe 41 and an upward pipe 42. The downward pipe 41 is connected between the inlet end of the evaporator 31 and the outlet end of the condenser 21, and the upward pipe 42 is connected between the outlet end of the evaporator 31 and the inlet end of the condenser 21.

[0053] Among them, the refrigerant medium in the downward pipe 41 is in a liquid state, and the refrigerant medium in the upward pipe 42 is in a gaseous state. The refrigerant medium forms a pure liquid refrigerant medium after being cooled down by the first refrigeration device 2 and is transported to the second refrigeration device 3 through the downward pipe 41. The liquid refrigerant medium is converted into a gaseous refrigerant medium after absorbing heat in the second refrigeration device 3, and the gaseous refrigerant medium is transported to the ground in the form of compressed air, which can avoid the need to pump cold water to the ground after it absorbs heat underground in the related art, reducing the power consumption.

[0054] Furthermore, both the downcomer 41 and the upcomer 42 are heat-insulating pipes, or heat-insulating sleeves are provided on the outer sides of the downcomer 41 and the upcomer 42. Using heat-insulating pipes to transport cooling medium, or setting heat-insulating sleeves on the outer sides of the downcomer 41 and the upcomer 42, can reduce the loss of cooling capacity, improve the refrigeration effect and the utilization rate of cooling capacity.

[0055] The heat-insulating sleeve can be made of heat-insulating cotton or other materials with heat-insulating and heat-preserving effects that are wrapped around the downcomer 41 and the upcomer 42.

[0056] In some embodiments, the first refrigeration device 2 includes a condenser 21, and the second refrigeration device 3 includes an evaporator 31. Its working principle is to compress the low-pressure refrigerant at the outlet end of the evaporator 31 into high-temperature and high-pressure steam, which then enters the condenser 21. The cooled refrigerant releases heat and condenses into a liquid. The refrigerant becomes a low-pressure and low-temperature gas-liquid two-phase flow after throttling through the expansion valve 23 and enters the evaporator 31. Gasification and heat absorption refrigeration occur in the evaporator 31. The low-pressure refrigerant after gasification and heat absorption is compressed again to continue the next refrigeration cycle.

[0057] Furthermore, the underground mine refrigeration system of the embodiment of the present utility model further includes a cooling tower 5. The cooling tower 5 is arranged on the ground and is connected to the condenser 21 to cool the refrigerant medium flowing through the condenser 21.

[0058] The cooling tower 5 is a water-cooling tower. The circulating water of the water-cooling tower exchanges heat with the refrigerant medium in the condenser 21, and the circulating water releases the heat to the surface air after absorbing heat. The circulating water in the cooling tower 5 is driven by a cooling water pump 51 to flow. The circulating water and the refrigerant medium in the condenser 21 exchange heat indirectly through a heat exchanger. The circulating water after absorbing heat dissipates heat and cools down in the cooling tower 5. A valve 52 can be provided on the circulating pipeline between the cooling tower 5, the cooling water pump 51 and the heat exchanger to adjust the on-off of the circulating pipeline and / or the flow rate in the pipeline.

[0059] Furthermore, the first refrigeration device 2 further includes a first compressor 22, an expansion valve 23 and a subcooler 24. The first compressor 22 is connected to the inlet end of the condenser 21, and the expansion valve 23 and the subcooler 24 are connected to the outlet end of the condenser 21. The liquid-phase outlet of the subcooler 24 is connected to the inlet end of the evaporator 31, and the gas-phase outlet of the subcooler 24 is connected to the inlet end of the condenser 21.

[0060] It should be understood that on the ground, the low-temperature and low-pressure gaseous refrigerant medium is compressed into a high-temperature and high-pressure gas by the first compressor 22, and then transported to the condenser 21, where the gaseous refrigerant medium exchanges heat with the relatively low-temperature cooling water outside. After losing heat, the high-temperature gaseous refrigerant medium condenses into a liquid refrigerant medium. The liquid refrigerant medium leaves the condenser 21, passes through the expansion valve 23 (throttle valve), and a part enters the vapor in the subcooler 24. The vapor part is compressed back to the condenser 21, while the pure liquid refrigerant medium is sent to the first chamber 1 (refrigeration chamber) underground through the downward pipeline 41 laid in the shaft or borehole.

[0061] Furthermore, the second refrigeration device 3 further includes a second compressor 32, an energy dissipation component 33, and a pressure reduction component 34. The second compressor 32 is connected to the outlet end of the evaporator 31; the energy dissipation component 33 is connected to the inlet end of the evaporator 31, and the energy dissipation component 33 is used to reduce the energy of the refrigerant medium when it enters the evaporator 31; the pressure reduction component 34 is connected to the inlet end of the evaporator 31, and the pressure reduction component 34 is used to reduce the pressure of the refrigerant medium at the inlet end of the evaporator 31.

[0062] That is to say, the pure liquid refrigerant medium is transported through the downward pipeline 41 to reach the first chamber 1 (refrigeration chamber) underground. During this period, the pure liquid refrigerant is cut off and enters the evaporator 31 after energy dissipation and pressure reduction through the energy consumption diffusion component and the pressure reduction component 34. The refrigerant medium is transformed from a liquid state to a gaseous state, absorbs heat by evaporation, and cools the air in the first chamber 1. Among them, the energy consumption diffusion component, the pressure reduction component 34, and the evaporator 31 are all arranged in the first chamber 1. Then, the gaseous refrigerant medium is compressed by the second compressor 32 and sent back to the ground in the form of compressed air along the upward pipeline 42. This process repeats, and the cold quantity is continuously transported downward in a cycle. The heat generated by the condenser 21 on the ground is cooled and circulated by the cooling tower 5.

[0063] The number of the energy consumption diffusion component and the pressure reduction component 34 can both be one or more. For example, the number of the pressure reduction devices is multiple, and the multiple pressure reduction devices are arranged at intervals on the downward pipeline 41 to achieve multi-stage pressure reduction. The pressure reduction devices can include pressure reducing valves, orifice plates, etc.

[0064] The energy consumption diffusion component is used for energy dissipation. Both the energy consumption diffusion component and the pressure reduction component 34 are used to ensure the normal and stable operation of the evaporator 31 and the stability of the refrigerant medium in the whole system.

[0065] In some embodiments, the air delivery device 6 includes a first fan 61 and an air supply pipeline 62 connected to each other, and a second fan 63 and a return air pipeline 64 connected to each other. The air inlet end of the air supply pipeline 62 is communicated with the first chamber 1, the air outlet end of the air supply pipeline 62 extends to the target area underground, the air inlet end of the return air pipeline 64 is located in the target area, and the air outlet end of the return air pipeline 64 is communicated with the first chamber 1.

[0066] The air supply duct 62 and the air return duct 64 form a circulating flow of air between the first chamber 1 and the target area underground, enabling the reuse of the air flow in the target area, reducing the loss of cooling capacity and the energy consumption of ventilation, and improving the utilization rate of cooling capacity.

[0067] Among them, the first fan 61 and the second fan 63 can both be mine axial-flow local ventilators.

[0068] In some embodiments, the air delivery device 6 further includes a purification component 65, which is connected to the air return duct 64. The purification component 65 is used to purify the gas in the air return duct 64, ensure the cleanliness of the air flow in the first chamber 1, and prevent dust during the mining operation of the tunneling face from entering the first chamber 1 with the air flow, affecting the air supply, as well as the safety and stability of the equipment.

[0069] The purification component 65 can be a purification and dust removal device such as a cyclone dust collector or a bag filter.

[0070] Furthermore, there is a partition wall 11 in the first chamber 1. The partition wall 11 divides the first chamber 1 into a connected air inlet chamber and an air return chamber. The air return duct 64 is communicated with the air return chamber, and the air supply duct 62 is communicated with the air inlet chamber.

[0071] It should be understood that in order to improve the heat exchange effect and optimize the air flow effect in the first chamber 1, in the embodiment of the present invention, the first chamber 1 is divided into two chambers by the partition wall 11. The returned air from the air return duct 64 first enters the air return chamber, then flows into the air inlet chamber, and then is transported to the target area through the air supply duct 62 to form a circulating flow.

[0072] At this time, the evaporator 31 can be arranged in the air inlet chamber, which can realize the centralized cooling of part of the gas in the first chamber 1, and can more accurately realize the temperature regulation and control, ensuring that the temperature of the air flowing into the air supply duct 62 meets the requirements of the target area for air volume and cooling capacity.

[0073] Furthermore, the first chamber 1 has a ventilation window 12. The ventilation window 12 has the function of adjusting the air volume in the first chamber 1. When the air supply volume of the first fan 61 increases, air can be supplemented through the ventilation window 12. When the air supply volume of the first fan 61 decreases, the excess air in the first chamber 1 can be discharged from the ventilation window 12.

[0074] Optionally, the ventilation window 12 is arranged between the air return chamber and the air inlet chamber, and the evaporator 31 is located between the ventilation window 12 and the air inlet end of the air supply duct 62, ensuring that the air flow cooled by the evaporator 31 can flow into the air supply duct 62 as much as possible, preventing the cooled air flow from spilling to other positions in the first chamber 1 or flowing out of the first chamber 1 through the ventilation window 12, resulting in problems such as poor refrigeration effect and low cooling capacity utilization rate.

[0075] Among them, the first chamber 1 is a chamber arranged underground. The first chamber 1 is a relatively airtight space. The first chamber 1 can communicate with the external air through the air window 12 to maintain the stable air volume in the first chamber 1, while avoiding the loss of cold in the first chamber 1.

[0076] In some embodiments, the underground mine refrigeration system of the embodiment of the present invention further includes a third fan 7. The third fan 7 is used to transport surface air into the underground. The third fan 7 is arranged on the surface. The fresh surface air 72 is transported to the underground by the shaft / borehole 8 after passing through the third fan 7.

[0077] In some embodiments, the underground mine refrigeration system of the embodiment of the present invention further includes a control system. The control system is connected to the first refrigeration device 2, the second refrigeration device 3 and the air delivery device 6 to control the actions of the first refrigeration device 2, the second refrigeration device 3 and the air delivery device 6.

[0078] It should be understood that the control system is used to control the start and stop of each device on the one hand, and to control the refrigeration efficiency, refrigeration capacity of the first refrigeration device 2 and the second refrigeration device 3, and the air supply volume of the air delivery device 6 on the other hand.

[0079] In use, it includes the following steps:

[0080] S101. Obtain the air volume and / or cooling capacity required by the target area underground. The target area underground is the heading face. Determine the refrigeration temperature according to the calculation result of the underground cooling load, and calculate the required cooling capacity.

[0081] S102. Control the flow rate and temperature of the refrigerant medium between the first refrigeration device 2 and the second refrigeration device 3 to adjust the temperature of the first chamber 1. Generally, the temperature in the first chamber 1 (refrigeration chamber) is about 8 - 10 °C.

[0082] S103. Adjust the flow rate of the air in the air delivery device 6 to meet the air volume and / or cooling capacity required by the target area underground.

[0083] Use the underground industrial ring network to achieve remote control and one-key interlock start, and according to the air volume or cooling capacity required by the single-heading roadway tunneling or stope working face underground, flexibly achieve air supply and cooling on demand by adjusting the flow rate of the refrigerant medium and adjusting the air intake and exhaust volume of the refrigeration chamber through the air window 12 in the refrigeration chamber.

[0084] The underground mine refrigeration system of the embodiment of the present invention can improve the refrigeration efficiency and reduce the influence of heat damage problems. At the same time, the underground mine refrigeration system of the embodiment of the present invention also has the following advantages:

[0085] (1) In the embodiment of the present utility model, the first refrigeration device and the second refrigeration device are respectively arranged on the ground and underground, with small capital construction investment and low operation cost. Through the reciprocating circulation of the refrigerant medium in the upward and downward pipelines in the shaft or borehole, the refrigeration efficiency is high, and there is no need to pump a large amount of hot water generated after condensation at the dead-end tunneling face thousands of meters deep to the ground.

[0086] (2) The embodiment of the present utility model can realize the repeated purification and utilization of the air flow at the dead-end working face, reducing the cold loss and ventilation energy consumption in the mine.

[0087] (3) In the embodiment of the present utility model, the condenser is placed on the ground instead of underground, and a large amount of condensation heat generated by refrigeration is released into the ground air, avoiding the generation of new heat sources in the underground dead-end roadway.

[0088] (4) The embodiment of the present utility model can flexibly adjust the air volume in the refrigeration supply chamber according to the required air volume and required cooling capacity of the working face by using the air window, and flexibly realize the supply of air and cooling on demand.

[0089] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0090] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0091] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0092] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0093] In the present utility model, the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0094] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. An underground mine refrigeration system, characterized in that, Comprising: A first chamber, which is arranged underground; A first refrigeration device and a second refrigeration device, the first refrigeration device is arranged above ground, and the second refrigeration device is arranged underground; A first pipe, which is connected between the first refrigeration device and the second refrigeration device to enable the refrigerant medium to circulate between the first refrigeration device and the second refrigeration device. The second refrigeration device is connected to the first chamber. After the first refrigeration device cools down the refrigerant medium transported to above ground by the second refrigeration device, it is then transported to the second refrigeration device to cool the air in the first chamber; An air delivery device, which is connected to the first chamber to deliver the cooled air in the first chamber to a target area underground.

2. The underground mine refrigeration system according to claim 1, wherein, The first refrigeration device includes a condenser, and the second refrigeration device includes an evaporator.

3. The underground mine refrigeration system according to claim 2, wherein It further includes a cooling tower, which is arranged above ground and is connected to the condenser to cool the refrigerant medium flowing through the condenser; And / or, the first refrigeration device further includes a first compressor, and the first compressor is connected to the inlet end of the condenser; And / or, the first refrigeration device further includes an expansion valve and a subcooler. The expansion valve and the subcooler are connected to the outlet end of the condenser. The liquid-phase outlet of the subcooler is connected to the inlet end of the evaporator, and the gas-phase outlet of the subcooler is connected to the inlet end of the condenser.

4. The underground mine refrigeration system according to claim 2, characterized in that, The second refrigeration device further includes a second compressor, and the second compressor is connected to the outlet end of the evaporator; And / or, the second refrigeration device further includes an energy dissipation component, which is connected to the inlet end of the evaporator, and the energy dissipation component is used to reduce the energy of the refrigerant medium when it enters the evaporator; And / or, the second refrigeration device further includes a pressure reducing component, which is connected to the inlet end of the evaporator, and the pressure reducing component is used to reduce the pressure of the refrigerant medium at the inlet end of the evaporator.

5. The underground mine refrigeration system according to claim 2, wherein The first pipe includes a downward pipe and an upward pipe. The downward pipe is connected between the inlet end of the evaporator and the outlet end of the condenser, and the upward pipe is connected between the outlet end of the evaporator and the inlet end of the condenser.

6. The underground mine refrigeration system according to claim 5, characterized in that, The refrigerant medium in the downward pipe is in a liquid state, and the refrigerant medium in the upward pipe is in a gaseous state; And / or, both the downward pipe and the upward pipe are heat-insulating pipes, or heat-insulating sleeves are provided on the outer sides of the downward pipe and the upward pipe.

7. The underground mine refrigeration system according to claim 1, characterized in that, The air delivery device includes a first fan and a air supply pipe connected to each other. The air inlet end of the air supply pipe is communicated with the first chamber, and the air outlet end of the air supply pipe extends to a target area underground.

8. The underground mine refrigeration system according to claim 7, characterized in that, The air delivery device further includes a second fan and a return air pipe connected to each other. The air inlet end of the return air pipe is located in the target area, and the air outlet end of the return air pipe is communicated with the first chamber.

9. The underground mine refrigeration system according to claim 8, wherein The air delivery device further includes a purification component, which is connected to the return air pipe, and the purification component is used to purify the gas in the return air pipe; And / or, a partition wall is provided in the first chamber, and the partition wall divides the first chamber into a communicating air inlet chamber and an air return chamber. The air return duct communicates with the air return chamber, and the air supply duct communicates with the air inlet chamber; And / or, the first chamber has a wind window.

10. The underground mine refrigeration system according to any one of claims 1 to 9, characterized in that, It further includes a third fan for delivering surface air into the ground; And / or, the first chamber is a chamber arranged underground; And / or, it further includes a control system, and the control system is connected to the first refrigeration device, the second refrigeration device and the air conveying device to control the actions of the first refrigeration device, the second refrigeration device and the air conveying device.

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