Air conditioning system

Abstract

To effectively cool air in a tunnel pit.SOLUTION: An air-conditioning-system 1A capable of adjusting at least an air temperature in a first area A, which is an area on a working face F side in a tunnel T, includes a first cooling-processing section 10 that cools tunnel air in the first area A or outside air introduced into the first area A from the outside of the tunnel T by using spring water and W1 generated in the tunnel, and a first air-sending processing section 30 that sends the tunnel air or the outside air cooled by the first cooling-processing section into the first area A.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an air conditioning system, and in particular to a technology suitable for managing air conditioning inside a tunnel construction site. [Background technology]

[0002] The inside of a tunnel construction site is hot and humid due to heat generated by construction machinery and spring water from the ground. Furthermore, dust is generated inside the tunnel due to concrete spraying and sand dust. Working in such an environment not only places a great deal of stress on the health of workers, but also raises concerns that it could cause damage to the construction machinery used inside the tunnel.

[0003] For example, Patent Document 1 discloses an air conditioning system in which a cooling means is placed in a ventilation path for introducing clean outside air into a working area inside a tunnel in an underground mine, and the outside air cooled by the cooling means is blown into the working area by a blower. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-031129 Summary of the Invention [Problem to be solved by the invention]

[0005] The air conditioning system described in Patent Document 1 requires that the cooling water used as cold energy in the cooling means be drawn from a water source separate from groundwater or spring water. For this reason, for example, if tap water is used as the water source, additional water charges are incurred, resulting in increased air conditioning costs. Furthermore, if tap water is drawn from outside the tunnel, as the distance from the tunnel entrance to the work area increases with the progress of tunnel excavation, the cooling water flow path for drawing tap water must be extended, resulting in increased equipment size and costs. Furthermore, if the tap water available on-site is not at a low temperature suitable for use as cold energy, the tap water must be cooled to the desired low temperature before use. In this case, a separate cooling means must be installed to cool the tap water, which increases the system's complexity and further increases the energy consumption required to operate the cooling means.

[0006] The technology disclosed herein has been made in consideration of the above circumstances, and aims to provide a technology that can effectively cool the air inside a tunnel using a simple configuration. [Means for solving the problem]

[0007] The air conditioning system of the present disclosure comprises: An air conditioning system (1A) capable of adjusting at least the air temperature of a first region (A) which is a region on the face (F) side inside a tunnel (T), a first cooling treatment unit (12, 20) that cools the underground air in the first area (A) or the outside air introduced into the first area (A) from the outside of the tunnel (T) by using spring water (W1) generated in the underground; a first air blowing processing section (30) that blows the underground air cooled by the first cooling processing section (12, 20) or the outside air into the first area (A). It is characterized by:

[0008] The air conditioning system of the present disclosure comprises: An air conditioning system (1B) capable of adjusting at least the air temperature of a first region (A) which is a region on the face (F) side inside a tunnel (T), an outside air introduction unit (50) extending in the tunnel axial direction and having an air supply pipe (51) for introducing outside air from the outside of the tunnel (T) into the first area (A); a second cooling treatment unit (72, 80) that cools the outside air introduced into the first area (A) through the air pipe (51) by using groundwater (W2) collected outside the mine; a second air blowing processing section (90) that blows the outside air cooled by the second cooling processing section (72, 80) into the air supply pipe (51) and introduces the air into the first area (A). It is characterized by:

[0009] Another aspect of the present disclosure is an air conditioning system comprising: The tunnel further includes a shielding unit (40) that divides the tunnel into the first area (A) and a second area (B) that is the area on the tunnel entrance side of the tunnel (T). It is desirable.

[0010] Another aspect of the present disclosure is an air conditioning system comprising: The apparatus further includes a dehumidifying and dust-collecting unit (60) including an exhaust pipe (61) for discharging underground air in the first area (A) to the second area (B) or outside the tunnel (T), a dehumidifying device (62) provided at one end of the exhaust pipe (61) on the first area (A) side for dehumidifying the underground air in the first area (A), and a dust collector (63) provided at the other end of the exhaust pipe (61) for separating dust from the underground air discharged through the exhaust pipe (61). It is desirable.

[0011] The air conditioning system of the present disclosure comprises: An air conditioning system (1C) capable of adjusting at least the air temperature of a first region (A) which is a region on the face (F) side inside a tunnel (T), an outside air introduction unit (50) extending in the tunnel axial direction and having an air supply pipe (51) for introducing outside air from the outside of the tunnel (T) into the first area (A); a first cooling treatment unit (12, 20) that cools the underground air in the first area (A) or the outside air introduced into the first area (A) through the air supply pipe (51) by using spring water (W1) generated in the underground; a first air blowing treatment section (30) that blows the underground air cooled by the first cooling treatment section (12, 20) or the outside air into the first area (A); a second cooling treatment unit (72, 80) that cools the outside air introduced into the first area (A) through the air pipe (51) by using groundwater (W2) collected outside the mine; a second air blowing treatment section (90) that blows the outside air cooled by the second cooling treatment section (72, 80) into the air supply pipe (51) and introduces the air into the first area (A). It is characterized by:

[0012] In the air conditioning system of the present disclosure, The first cooling treatment unit (12, 20) a first circulation pipe (21) for circulating a first refrigerant; a first refrigerant pump (P2) provided in the first circulation pipe (21) for pumping the first refrigerant; a first heat exchange section (18) provided in the first circulation pipe (21) for exchanging heat between the first refrigerant and the spring water (W1); a second heat exchange section (28) provided in the first circulation pipe (21) for exchanging heat between the first refrigerant and the air in the first region (A); a spring water supply pipe (13) for supplying the spring water (W1) to the first heat exchange section (18); a spring water return pipe (14) for returning the spring water (W1) supplied to the first heat exchange section (18) to a groundwater system; a spring water pump (P1) provided in the spring water supply pipe (13) or the spring water return pipe (14) for pumping up the spring water (W1). It is desirable.

[0013] In the air conditioning system of the present disclosure, The second cooling treatment section (72, 80) a second circulation pipe (81) for circulating a second refrigerant; a second refrigerant pump (P4) provided in the second circulation pipe (81) for pumping the second refrigerant; a third heat exchange section (78) provided in the second circulation pipe (81) for exchanging heat between the second refrigerant and the groundwater (W2); a fourth heat exchange section (88) provided in the second circulation pipe (81) for exchanging heat between the second refrigerant and outside air introduced into the first area (A); a groundwater supply pipe (73) for supplying the groundwater (W2) to the third heat exchange section (78); and a groundwater return pipe (74) for returning the groundwater (W2) supplied to the third heat exchange section (78) to a groundwater system. a groundwater pump (P3) provided in the groundwater supply pipe (73) or the groundwater return pipe (74) for pumping up the groundwater (W2). It is desirable.

[0014] In the above description, to aid in understanding the present disclosure, the symbols used in the embodiments are added in parentheses to components corresponding to the embodiments, but each component is not limited to the embodiment defined by the symbol. [Effects of the Invention]

[0015] According to the air conditioning system of the present disclosure, the air inside the tunnel can be effectively cooled with a simple configuration. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic overall configuration diagram showing an air conditioning system according to a first embodiment. [Figure 2] 10 is a schematic front view of the shielding unit according to the present embodiment in a shielding state, as viewed from the tunnel axis direction. FIG. [Figure 3]10 is a schematic front view of the shielding unit according to the present embodiment in an open state, as viewed from the tunnel axis direction. FIG. [Figure 4] 10 is a schematic front view of the shielding unit according to the present embodiment in an open state, as viewed from the tunnel axis direction. FIG. [Figure 5] FIG. 10 is a schematic overall configuration diagram showing an air conditioning system according to a second embodiment. [Figure 6] FIG. 10 is a schematic overall configuration diagram showing an air conditioning system according to a third embodiment. [Figure 7] FIG. 10 is a schematic overall configuration diagram showing an air conditioning system according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an air conditioning system according to this embodiment will be described with reference to the accompanying drawings.

[0018] [First embodiment] Fig. 1 is a schematic overall configuration diagram showing an air conditioning system 1A according to a first embodiment. As shown in Fig. 1, the air conditioning system 1A is applied to a tunnel T constructed using a mountain tunneling method, and includes a first cooling unit 10, a shielding unit 40, an outside air introduction unit 50, and a dehumidification and exhaust unit 60. In the figure, reference numeral 100 denotes primary shotcrete sprayed onto the ground G, reference numeral 110 denotes shoring erected in the ground G, reference numeral 120 denotes secondary shotcrete sprayed onto the surfaces of the primary shotcrete 100 and the shoring 110, and reference numeral 130 denotes lining concrete poured using a centering tool or the like (not shown).

[0019] The first cooling unit 10 is disposed in an area A of the tunnel T, closer to the tunnel face F than the shielding unit 40. Area A is an example of the first area of ​​the present disclosure. The first cooling unit 10 uses natural energy to cool the air in area A (hereinafter also referred to as tunnel air). In this embodiment, the first cooling unit 10 uses spring water W1 that springs up in the tunnel during tunnel construction as the cold energy. Specifically, the first cooling unit 10 includes a spring water treatment unit 12, a first heat exchange unit 18, a first refrigerant circulation unit 20, a second heat exchange unit 28, a first air blowing treatment unit 30, and a first control unit 35. The components 12, 18, 20, 28, 30, and 35 of the first cooling unit 10 are preferably mounted on a platform 11 equipped with wheels HW so that they can move together. The platform 11 may travel directly on the ground of the tunnel T, or may travel on rails 150 on which a center or the like (not shown) is placed.

[0020] The spring water treatment unit 12 includes a spring water supply pipe 13 that supplies spring water W1 that has welled up inside the mine to the first heat exchange unit 18, a spring water pump P1 that pumps up the spring water W1, a spring water return pipe 14 that returns the spring water W1 supplied to the first heat exchange unit 18 to the groundwater system, and a filter 15 that is provided at a predetermined position on the spring water supply pipe 13. The filter 15 is a filtering device that removes foreign matter such as pebbles and gravel from the spring water W1 flowing through the spring water supply pipe 13. The spring water pump P1 may be provided on either the spring water supply pipe 13 or the spring water return pipe 14, as long as it is located downstream of the filter 15. The spring water pump P1 may be an electric pump, or a mechanical pump that is driven by power extracted from an engine or other work machine.

[0021] In the spring water treatment unit 12, when the spring water pump P1 is driven, low-temperature spring water W1 is supplied from the spring water supply pipe 13 to the first heat exchange unit 18, where heat is exchanged between the low-temperature spring water W1 and a refrigerant R, which will be described later. The spring water W1, whose temperature has been increased by the heat exchange with the refrigerant R, is returned to the groundwater system via the spring water return pipe 14.

[0022] The first refrigerant circulation unit 20 includes a first refrigerant circulation pipe 21 that circulates the refrigerant R, and a first refrigerant pump P2 that is provided in the first refrigerant circulation pipe 21 and pressurizes the refrigerant R in the first refrigerant circulation pipe 21. The first refrigerant circulation pipe 21 is provided with a first heat exchange unit 18 and a second heat exchange unit 28. The type of refrigerant R is not particularly limited, but may be, for example, CO2 or water.

[0023] When the first refrigerant pump P2 is driven, the low-temperature refrigerant R cooled by the low-temperature spring water W1 in the first heat exchanger 18 is supplied to the second heat exchanger 28 via the first refrigerant circulation pipe 21 and exchanges heat with underground mine air taken into the first air blowing treatment unit 30, which will be described later. The refrigerant R, whose temperature has been raised by heat exchange with the underground mine air, is returned to the first heat exchanger 18 via the first refrigerant circulation pipe 21 and is cooled by heat exchange with the low-temperature spring water W1 in the first heat exchanger 18.

[0024] The first air blowing processing section 30 is equipped with a mine air intake port 31 for taking in mine air into the second heat exchange section 28, a fan 32 for compressing and sending air that has been cooled by heat exchange with refrigerant R in the second heat exchange section 28 (hereinafter also referred to as low-temperature air), and a low-temperature air outlet 33 for discharging the low-temperature air compressed and sent by the fan 32. When the fan 32 is driven, low-temperature air is continuously discharged from the low-temperature air outlet 33, thereby lowering the air temperature in the area A on the working face F side of the shielding unit 40.

[0025] The first control unit 35 is a so-called microcomputer equipped with a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), an interface device IF, etc. The first control unit 35 is communicatively connected to the spring water pump P1, the refrigerant pump P2, etc. The first control unit 35 controls the operation of the spring water pump P1 and the refrigerant pump P2 to perform air conditioning control to adjust the temperature of the air in the mine to a desired set temperature set by on-site workers, managers, etc. Specifically, the first control unit 35 is connected to a temperature sensor 36 that measures the temperature of the air in the mine. The first control unit 35 performs feedback control to maintain the air temperature near the predetermined set temperature by operating the spring water pump P1 and the refrigerant pump P2 when the air temperature measured by the temperature sensor 36 is higher than the predetermined set temperature, and by stopping the operation of the spring water pump P1 and the refrigerant pump P2 when the air temperature measured by the temperature sensor 36 is lower than the predetermined set temperature.

[0026] In addition, the air conditioning control is not limited to a configuration that controls the operation of the spring water pump P1 and the refrigerant pump P2. For example, as shown by the dashed line in Figure 1, it is also possible to provide a bypass flow path L in the first refrigerant circulation pipe 21, and when heat exchange (cooling) is not required, circulate the refrigerant R through the bypass flow path L to bypass the first heat exchange section 18 or the second heat exchange section 28.

[0027] The shielding unit 40 separates the interior of the tunnel T into an area A on the tunnel face F side and an area B on the tunnel mouth side (the second area of ​​the present disclosure), and can use a face containment device equipped with a balloon or the like. Face containment devices equipped with balloons are well known (see, for example, Japanese Patent Nos. 5859096, 5757758, and 5662854). Therefore, the shielding unit 40 will be briefly described below.

[0028] 2 to 4 are schematic front views of the shielding unit 40 according to this embodiment as viewed from the tunnel axis direction, with FIG. 2 showing the shielded state and FIG. 3 showing the open state. The shielding unit 40 includes a carriage 41 that can run on a rail 150, a plurality of balloons 42 to 44, and a holding rod 45. The carriage 41 is formed in a gate shape having a pair of left and right vertical posts 41A, 41B and a horizontal post 41C that spans the upper ends of the vertical posts 41A, 41B. A curtain rail 46 is provided on the horizontal post 41C, and a plurality of pulleys (not shown) that can move along the curtain rail 46 are attached to the curtain rail 46.

[0029] The balloons 42-44 include a left balloon 42, a right balloon 43, and an upper balloon 44. When the balloons 42-44 are filled with air and inflated, they come into close contact with the inner wall side and ceiling surfaces of the tunnel T, thereby creating a shielding state that separates the area A on the tunnel face F side from the area B on the tunnel mouth side (see FIG. 2). At this time, the upper balloon 44 inflates to surround the outer periphery of the air supply pipe 51 of the outside air introduction unit 50 and the exhaust pipe 61 of the dehumidification and exhaust unit 60, which will be described later. On the other hand, when the balloons 42-44 are deflated by discharging air from their interiors, they move away from the inner wall side and ceiling surfaces of the tunnel T, creating an open state that connects the area A on the tunnel face F side to the area B on the tunnel mouth side (see FIG. 3).

[0030] The bag body 42A of the left balloon 42 on the right side of the left vertical support 41A and the bag body 43A of the right balloon 43 on the left side of the right vertical support 41B are movably suspended from a curtain rail 46 via pulleys (not shown). As shown in Fig. 4, the shielding unit 40 is configured to deflate the bag body 42A of the left balloon 42 and the bag body 43A of the right balloon 43, and move these bags 42A, 43A along the curtain rail 46 in the direction of arrow Y in the figure, thereby forming an opening 48 that allows vehicles and the like to pass through.

[0031] Referring again to FIG. 1, the outside air introduction unit 50 includes an air pipe 51 suspended from the ceiling wall of tunnel T, and a blower 52 having a fan or the like (not shown) that draws clean outside air into the air pipe 51 and compresses and sends it out. An intake port 51A (upstream end) of the air pipe 51 through which the outside air is taken is preferably located outside the tunnel T. The air pipe 51 extends inside the tunnel T in the tunnel axial direction and penetrates the upper balloon 44 (see FIGS. 2 to 4) of the shielding unit 40. An outlet port 51B (downstream end) of the air pipe 51 that discharges the outside air reaches area A on the face F side. The outside air introduction unit 50 is configured so that, when the blower 52 is driven, clean outside air taken in from outside the tunnel T is continuously supplied to area A on the face F side through the air pipe 51.

[0032] The dehumidifying and exhausting unit 60 includes an exhaust pipe 61 suspended from the ceiling wall of the tunnel T, a dehumidifier 62 for dehumidifying the air in the area A on the face F side, and a dust collector 63 for separating dust particles and the like from the contaminated air in the area A. One end (upstream end) of the exhaust pipe 61 is located in the area A on the face F side, passes through the upper balloon 44 (see Figures 2 to 4) of the shielding unit 40, and the other end (downstream end) is located in the area B on the tunnel mouth side. One end of the exhaust pipe 61 is connected to the dehumidifier 62, and the other end of the exhaust pipe 61 is connected to the dust collector 63. The dehumidifier 62 dehumidifies the air in the area A by cooling it to the dew point temperature. The dust collector 63 collects and discharges the contaminated air supplied from the area A through the exhaust pipe 61. The other end of the exhaust pipe 61 may be located outside the tunnel T.

[0033] In this embodiment, the exhaust rate from the dehumidifying exhaust unit 60 is preferably set to be greater than the air supply rate from the outside air introduction unit 50. This creates a negative pressure in the space within area A on the face F side, and even when, for example, as shown in Figure 4, an opening 48 is formed in the shielding unit 40 to allow vehicles or the like to pass through, it becomes possible to effectively prevent the contaminated air within area A from diffusing into area B of the tunnel T.

[0034] The air conditioning system 1A according to the first embodiment described above is configured to use the spring water W1 generated inside the tunnel T as cold energy to cool the air in the area A on the face side, thereby maintaining the air temperature in area A at an appropriate temperature. This prevents the area A on the face side, which is the work area, from becoming too hot, and effectively reduces stress on the health of workers. Furthermore, by using the spring water W1 as cold energy, air conditioning costs can be reliably reduced compared to using tap water from a separate system as a water source, and energy savings can also be achieved.

[0035] Furthermore, by separating area A on the face side from area B on the wellhead side using the shielding unit 40, the system is configured to effectively prevent air in area A from flowing out into area B. This reliably improves the cooling efficiency in area A on the face side while effectively preventing contaminated air from diffusing into area B on the wellhead side. The system is also configured so that the air in area A sealed off by the shielding unit 40 is dehumidified by a dehumidifier 62, clean outside air is introduced into area A through an air supply pipe 51, and contaminated air in area A is collected by a dust collector 63 before being discharged. This makes it possible to maintain appropriate humidity levels in area A while keeping the air in area A clean. This reliably reduces worker stress and damage to work machinery, thereby improving productivity and safety.

[0036] [Second embodiment] Fig. 5 is a schematic overall configuration diagram showing an air conditioning system 1B according to the second embodiment. As shown in Fig. 5, the air conditioning system 1B includes a shielding unit 40, an outside air introduction unit 50, a dehumidification and exhaust unit 60, and a second cooling unit 70. The shielding unit 40, the outside air introduction unit 50, and the dehumidification and exhaust unit 60 included in the second embodiment have the same configurations as those in the first embodiment, and therefore detailed description thereof will be omitted.

[0037] The second cooling unit 70 is disposed outside the tunnel T (preferably near the tunnel entrance). The second cooling unit 70 cools the outside air to be sent into the region A of the tunnel T using groundwater W2 collected near the tunnel construction site. Specifically, the second cooling unit 70 includes a groundwater treatment section 72, a third heat exchange section 78, a second refrigerant circulation section 80, a fourth heat exchange section 88, a second air blowing treatment section 90, and a second control section 95. Each of the components 72, 78, 80, 88, 90, and 95 of the second cooling unit 70 is preferably mounted on a platform 71 equipped with wheels HW so that they can be moved as a unit.

[0038] The groundwater treatment unit 72 includes a groundwater supply pipe 73 that supplies groundwater W2 to the third heat exchanger 78, a groundwater pump P3 that pumps up the groundwater W2, a groundwater return pipe 74 that returns the groundwater W2 supplied to the third heat exchanger 78 to the groundwater system, and a filter 75 provided at a predetermined position in the groundwater supply pipe 73. The filter 75 is a filtering device that removes foreign matter such as pebbles and gravel contained in the groundwater W2 flowing through the groundwater supply pipe 73. The groundwater pump P3 may be provided in either the groundwater supply pipe 73 or the groundwater return pipe 74, as long as it is located downstream of the filter 75. The groundwater pump P3 may be an electric pump or a mechanical pump driven by power extracted from an engine, another work machine, or the like.

[0039] In the groundwater treatment unit 71, when the groundwater pump P3 is driven, low-temperature groundwater W2 is supplied from the groundwater supply pipe 73 to the third heat exchanger 78, where heat is exchanged between the low-temperature groundwater W2 and a refrigerant R (described later). The groundwater W2, whose temperature has been increased by the heat exchange with the refrigerant R, is returned to the groundwater system via the groundwater return pipe 74.

[0040] The second refrigerant circulation unit 80 includes a second refrigerant circulation pipe 81 that circulates the refrigerant R, and a second refrigerant pump P4 that is provided in the second refrigerant circulation pipe 81 and pressurizes the refrigerant R in the second refrigerant circulation pipe 81. The second refrigerant circulation pipe 81 is provided with a third heat exchange unit 78 and a fourth heat exchange unit 88. The type of refrigerant R is not particularly limited, but may be, for example, CO2 or water.

[0041] When the second refrigerant pump P4 is driven, the low-temperature refrigerant R cooled by the low-temperature groundwater W2 in the third heat exchanger 78 is supplied to the fourth heat exchanger 88 via the second refrigerant circulation pipe 81, and exchanges heat with outside air taken into the second air blowing treatment unit 90, which will be described later. The refrigerant R, whose temperature has been increased by heat exchange with the outside air, is returned to the third heat exchanger 78 via the second refrigerant circulation pipe 81, and is cooled by heat exchange with the low-temperature groundwater W2 in the third heat exchanger 78.

[0042] The second air blowing processing section 90 is equipped with an outside air intake port 91 for taking in outside air into the fourth heat exchange section 88, a second fan 92 for compressing and sending out outside air cooled by heat exchange with refrigerant R in the fourth heat exchange section 88 (hereinafter referred to as low-temperature outside air), and a low-temperature outside air outlet port 93 for discharging the low-temperature outside air compressed by the second fan 92 into the air supply pipe 51 of the outside air introduction unit 50. When the second fan 92 is driven, the low-temperature outside air is discharged from the low-temperature outside air outlet port 93 and introduced into area A on the face F side through the air supply pipe 51, thereby lowering the underground temperature in area A on the face F side relative to the shielding unit 40.

[0043] The second control unit 95 is a so-called microcomputer equipped with a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), an interface device IF, etc. The second control unit 95 is communicatively connected to the groundwater pump P3, the second refrigerant pump P4, etc. The second control unit 95 controls the operation of the groundwater pump P3 and the second refrigerant pump P4 to perform air conditioning control, adjusting the underground air temperature to a desired set temperature set by an on-site worker, manager, or the like. Specifically, the second control unit 95 is connected to a temperature sensor 36 via wireless or wired communication (wireless communication in the illustrated example). The second control unit 95 performs feedback control to maintain the air temperature near the predetermined set temperature by driving the groundwater pump P3 and the second refrigerant pump P4 when the air temperature measured by the temperature sensor 36 is higher than the predetermined set temperature, and by stopping the driving of the groundwater pump P3 and the second refrigerant pump P4 when the air temperature measured by the temperature sensor 36 is lower than the predetermined set temperature.

[0044] In addition, the air conditioning control is not limited to a configuration that controls the operation of the groundwater pump P3 and the second refrigerant pump P4. For example, as shown by the dashed line in Figure 5, it is also possible to provide a bypass flow path L in the second refrigerant circulation piping 81, and when heat exchange (cooling) is not required, to circulate the refrigerant R through the bypass flow path L and bypass the third heat exchange section 78 or the fourth heat exchange section 88.

[0045] According to the air conditioning system 1B of the second embodiment described above, the outside air introduced into the area A on the tunnel face side is cooled using groundwater W2 collected near the tunnel construction site (for example, near the tunnel entrance outside the tunnel T), thereby maintaining the air temperature in the area A at an appropriate temperature. This prevents the area A on the tunnel face side, which is the work area, from becoming too hot, effectively minimizing stress on the health of workers. Furthermore, by using groundwater W2 for cooling, air conditioning costs can be reliably reduced compared to using tap water from a separate system as a water source, and energy savings can also be achieved.

[0046] [Third embodiment] Fig. 6 is a schematic overall configuration diagram showing an air conditioning system 1C according to a third embodiment. As shown in Fig. 6, the air conditioning system 1C according to the third embodiment includes both the first cooling unit 10 according to the first embodiment and the second cooling unit 70 according to the second embodiment. In Fig. 6, the first control unit 35 and the second control unit 95 of the air conditioning system 1C are shown as separate pieces of hardware, but they can also be configured as an integrated piece of hardware.

[0047] According to the air conditioning system 1C of the third embodiment, by providing a first cooling unit 10 that uses spring water W1 as a refrigerant and a second cooling unit 70 that uses groundwater W2 as a refrigerant, it is possible to more reliably improve the cooling efficiency in the area A on the face side. In particular, even when it is not possible to secure a sufficient amount of either the spring water W1 or the groundwater W2, it is possible to effectively cool the air in the area A.

[0048] [others] The present disclosure is not limited to the above-described embodiments, and can be appropriately modified and implemented within the scope of the present disclosure.

[0049] For example, as shown in Fig. 7, in the air conditioning system 1A of the first embodiment (or the air conditioning system 1C of the third embodiment), it is also possible to configure the system so that the downstream end of the air supply pipe 51 is connected to the first air supply processing section 30, and the outside air introduced from the air supply pipe 51 is cooled in the second heat exchange section 28 and sent into the face-side area A. In this case, the same effects as those of the above-mentioned embodiments can be achieved.

[0050] Furthermore, the shielding unit 40 is not limited to a physical shielding mechanism including balloons 42 to 44, etc., but an air curtain or the like can also be used. Furthermore, the air conditioning systems 1A, 1B, 1C according to the present embodiment can be widely applied not only to tunnels T constructed by mountain tunneling methods, but also to tunnels constructed by other construction methods, such as shield tunnels. Furthermore, the present disclosure is not limited to tunnels under construction, but can also be applied to air conditioning management of completed tunnels. [Explanation of symbols]

[0051] DESCRIPTION OF SYMBOLS 1A, 1B, 1C...air conditioning system, 10...first cooling unit, 11...frame, HW...wheels, 12...spring water treatment unit, 13...spring water supply piping, 14...spring water return piping, 15...filter, P1...spring water pump, 18...first heat exchange unit, 20...first refrigerant circulation unit, 21...first refrigerant circulation piping, P2...first refrigerant pump, 28...second heat exchange unit, 30...first air supply treatment unit, 31...mine air intake port, 32...fan, 33...low-temperature air outlet, 35...first control unit, 36...temperature sensor, 40...shielding unit, 41...cart, 41A, 41B...vertical support, 41C...horizontal support, 42...left balloon, 43...right balloon, 44...upper balloon, 45...holding rod, 46...curtain rail, 50...outside air introduction Unit, 51...air supply pipe, 52...blower, 60...dehumidification exhaust unit, 61...exhaust pipe, 62...dehumidifier, 63...dust collector, 70...second cooling unit, 71...frame, HW...wheel, 72...groundwater treatment unit, 73...groundwater supply piping, 74...groundwater return piping, 75...filter, P3...groundwater pump, 78...fourth heat exchange unit, 80...second refrigerant circulation unit, 81...second refrigerant circulation piping, P4...second refrigerant pump, 88...fourth heat exchange unit, 90...second air supply treatment unit, 91...outside air intake port, 92...second fan, 93...low-temperature outside air outlet, 95...second control unit, T...tunnel, 100...primary shotcrete, 110...shoring, 120...secondary shotcrete, 130...lining concrete

Claims

1. An air conditioning system capable of adjusting at least the air temperature of a first region which is a region on the face side of a tunnel shaft, A first cooling treatment unit that cools the underground air in the first area or the outside air introduced into the first area from the outside of the tunnel using spring water generated in the underground; a first air blowing processing unit that blows the underground air cooled by the first cooling processing unit or the outside air into the first area. An air conditioning system characterized by:

2. An air conditioning system capable of adjusting at least the air temperature of a first region which is a region on the face side of a tunnel shaft, an outside air introduction unit extending in the tunnel axial direction and having an air supply pipe for introducing outside air from the outside of the tunnel into the first area; a second cooling treatment unit that cools the outside air introduced into the first area through the air pipe using groundwater collected outside the mine; a second air blowing processing unit that blows the outside air cooled by the second cooling processing unit into the air supply pipe and introduces the air into the first area. An air conditioning system characterized by:

3. 3. The air conditioning system according to claim 1 or 2, The tunnel further includes a shielding unit that divides the tunnel into the first area and a second area that is an area on the tunnel entrance side. An air conditioning system characterized by:

4. 4. The air conditioning system according to claim 3, The apparatus further includes a dehumidifying and dust collecting unit including an exhaust pipe for discharging underground air in the first area to the second area or outside the tunnel, a dehumidifying device provided at one end of the exhaust pipe on the first area side and for dehumidifying the underground air in the first area, and a dust collector provided at the other end of the exhaust pipe and for separating dust from the underground air discharged through the exhaust pipe. An air conditioning system characterized by:

5. An air conditioning system capable of adjusting at least the air temperature of a first region which is a region on the face side of a tunnel shaft, an outside air introduction unit extending in the tunnel axial direction and having an air supply pipe for introducing outside air from the outside of the tunnel into the first area; A first cooling treatment unit that cools the underground air in the first area or the outside air introduced into the first area through the air pipe by using spring water generated in the underground; A first air blowing processing unit that blows the underground air cooled by the first cooling processing unit or the outside air into the first area; a second cooling treatment unit that cools the outside air introduced into the first area through the air pipe using groundwater collected outside the mine; a second air blowing processing unit that blows the outside air cooled by the second cooling processing unit into the air supply pipe and introduces the air into the first area. An air conditioning system characterized by:

6. 10. The air conditioning system according to claim 1, The first cooling processing unit is a first circulation pipe for circulating a first refrigerant; a first refrigerant pump provided in the first circulation pipe for pumping the first refrigerant; a first heat exchange unit provided in the first circulation pipe for exchanging heat between the first refrigerant and the spring water; a second heat exchanger provided in the first circulation pipe for exchanging heat between the first refrigerant and the air in the first region; a spring water supply pipe for supplying the spring water to the first heat exchange unit; a spring water return pipe that returns the spring water supplied to the first heat exchange unit to a groundwater system; a spring water pump that is provided in the spring water supply pipe or the spring water return pipe and pumps up the spring water. An air conditioning system characterized by:

7. 6. The air conditioning system according to claim 2 or 5, The second cooling processing unit is a second circulation pipe for circulating a second refrigerant; a second refrigerant pump provided in the second circulation pipe for pumping the second refrigerant; a third heat exchange unit provided in the second circulation piping and configured to exchange heat between the second refrigerant and the groundwater; a fourth heat exchanger provided in the second circulation pipe for exchanging heat between the second refrigerant and outside air introduced into the first region; a groundwater supply pipe that supplies the groundwater to the third heat exchange unit; and a groundwater return pipe that returns the groundwater supplied to the third heat exchange unit to a groundwater system. a groundwater pump that is provided in the groundwater supply pipe or the groundwater return pipe and pumps up the groundwater. An air conditioning system characterized by:

Images