CN218915199U - Compression refrigeration and solution dehumidification coupled subway shield environment air conditioning system - Google Patents

Abstract

The utility model discloses a subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling, which comprises a compression refrigeration-solution regeneration coupling unit, a solution dehumidification unit, an air cooling unit, a secondary air blower, a primary fresh air pipeline, a secondary fresh air pipeline, an air curtain, a first air valve, a second air valve and a third air valve, wherein cold water and dehumidification concentrated solution are produced through the compression refrigeration-solution regeneration coupling unit, air flow is dehumidified and cooled through the solution dehumidification unit and the air cooling unit, and finally low-temperature dry air is conveyed to an operation area. Meanwhile, the air curtain is utilized to divide the shield tunnel into a strict control area and a general control area, and the strict control area is used as a control object of a hot and humid environment. The utility model improves the temperature and humidity comfort of the air environment in the strictly controlled area, particularly effectively reduces the humidity and greatly improves the dehumidification effect of the air conditioning system.

Description

Compression refrigeration and solution dehumidification coupled subway shield environment air conditioning system

Technical Field

The utility model relates to the technical field of air conditioning cooling and dehumidification of subway shield construction environments, in particular to a subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupled.

Background

Along with the rapid growth of urban population and continuous increase of traffic pressure in China, the subway shield is used as an important construction technology in various underground foundation engineering constructions such as urban subway construction and the like, and is also widely applied correspondingly. However, because a large number of heat dissipation devices and heat dissipation sources exist in the subway shield tunnel, construction operators are in a severe working environment with high temperature and high humidity for a long time, and especially when the outdoor air temperature is high in summer, the temperature of a shield construction area often reaches more than 40 ℃, and the relative humidity also exceeds 90%. Under the high-temperature and high-humidity environment conditions, constructors can not only generate physiological injury, but also cause mental fatigue, thereby inducing the occurrence of safety accidents. In addition, the reduction of the viscosity, the lubrication effect and the like of the machine oil caused by the high-temperature and high-humidity environment can obviously improve the failure rate of equipment such as a shield machine and the like, and the construction progress is influenced while the service life of the equipment is shortened.

At present, the cooling method commonly adopted in the construction tunnel comprises the following steps: (1) The air in the tunnel is replaced by adopting a mechanical ventilation mode, but the ventilation effect is poor due to the influence of long tunnel, insufficient wind pressure and the like, and the influence of outdoor environment is serious, especially in hot summer, the environment in the tunnel is deteriorated due to the high-temperature and high-humidity outdoor air; (2) The construction environment is improved by adopting a local ice cooling mode, but the duration is short, the air parameters are uncontrollable, and the influence range is small; (3) The environment temperature in the tunnel is reduced by adopting the modes of sprinkling water and exchanging heat of cooling water, but the rise of the moisture content of air in the tunnel can be accelerated, and the problem of high humidity cannot be solved; (4) The shield machine and the whole tunnel are cooled and dehumidified by adopting the water-cooling unit air conditioning system, the cooling effect is obvious, but the air humidity is still higher, the overall thermal comfort is still to be improved, and huge equipment needs special trailer carrying, so that a certain space is occupied, and the initial investment and the operation cost are increased.

In summary, the existing related research still has difficulty in fully solving the problem of high temperature and high humidity of the shield construction environment, so that the existing scheme and system are difficult to be applied for a long time and popularized in a large area in actual engineering. Therefore, a subway shield construction environment air conditioning system with low energy consumption and good cooling and dehumidifying effects is increasingly needed.

Disclosure of Invention

The utility model provides a subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupled, which aims to solve the technical problem of poor dehumidification effect of the existing subway shield air conditioning system.

According to one aspect of the present utility model, there is provided a subway shield environment air conditioning system with coupling of compression refrigeration and solution dehumidification, comprising a compression refrigeration-solution regeneration coupling unit, a solution dehumidifier unit, an air cooler unit, a secondary air blower, a primary fresh air duct, a secondary fresh air duct, an air curtain, a first air valve, a second air valve and a third air valve, wherein the air curtain is arranged at a separation part between a strict control area and a general control area of a shield tunnel and is used for blocking airflow between the two areas, the primary fresh air duct is used for introducing surface fresh air, the secondary fresh air duct is connected with the primary fresh air duct to form an airflow conveying channel, the secondary air blower, the first air valve and the air cooler unit are sequentially arranged on the secondary fresh air duct along the airflow flowing direction, the secondary air blower is used for pressurizing and conveying the airflow, the air cooler unit is arranged in the general control area and is connected with the primary air duct through an air inlet branch, the compression refrigeration-solution regeneration coupling unit is also connected with the air cooler unit through an air inlet pipe to form an airflow conveying channel, the secondary fresh air duct is connected with the air cooler unit through an air inlet branch, the air cooler unit is arranged between the first fresh air blower and the air blower unit and the second air blower unit, the air cooler unit is connected with the air cooler unit through the air inlet branch, the air cooler unit is arranged at a position between the air cooler unit and the air blower, and the air cooler unit is arranged at a position between the air cooler unit and the air blower and the air cooler unit, the solution dehumidifier unit is also connected with a compression refrigeration-solution regeneration coupling unit to form a solution circulation pipeline, and the compression refrigeration-solution regeneration coupling unit is used for refrigerating circulated chilled water and converting circulated dilute solution into concentrated solution.

Further, the solution dehumidifier unit and the air cooler unit are both arranged in a strict control area.

Further, in the ventilation mode, the first air valve is opened, the second air valve and the third air valve are closed, and the compression refrigeration-solution regeneration coupling unit, the solution dehumidification unit and the air cooling unit do not work; in a single refrigeration mode, the first air valve is opened, the second air valve and the third air valve are closed, the compression refrigeration-solution regeneration coupling unit and the air cooling unit work, and the solution dehumidifier unit does not work; and in the refrigeration and dehumidification mode, the first air valve is closed, the second air valve and the third air valve are opened, and the compression refrigeration-solution regeneration coupling unit, the solution dehumidification unit and the air cooling unit work.

Further, the compression refrigeration-solution regeneration coupling unit comprises a unit shell, a compressor, a solution heater, an air heater, an expansion valve, an evaporator, a solution heat exchanger, a dilute solution spray chamber, a concentrated solution liquid collecting tank and an axial fan, wherein the unit shell is internally divided into an upper part and a lower part, the compressor, the solution heater, the expansion valve, the evaporator and the solution heat exchanger are arranged at the lower part, an air inlet is formed in the top of the unit shell, an air outlet is formed in the side surface of the upper part of the unit shell so as to form an upper air flow channel, the air inlet is connected with a primary fresh air pipeline through an air inlet branch pipe, the air heater, the dilute solution spray chamber and the axial fan are sequentially arranged in the upper air flow channel along the air flow direction, the dilute solution spray chamber is internally provided with the dilute solution spray chamber, the concentrated solution liquid collecting tank is arranged at the bottom of the dilute solution spray chamber, the evaporator is connected with an air cooling unit so as to refrigerate circulated chilled water, the evaporator, the compressor, the solution heater, the air heater and the expansion valve are sequentially connected with the air heat exchanger so as to form a refrigerant circulation pipeline, the solution heat exchanger is connected with the dehumidifier, the solution heat exchanger is sequentially connected with the dilute solution spray chamber so as to realize the heat exchange of concentrated solution.

Further, the front and the back of the dilute solution spray chamber are respectively provided with a first water baffle.

Further, the solution dehumidifier unit comprises a shell and a concentrated solution spray chamber, the concentrated solution spray chamber is arranged inside the shell, a concentrated solution sprayer is arranged in the concentrated solution spray chamber, a dilute solution liquid collecting tank is arranged at the bottom of the concentrated solution spray chamber, the concentrated solution sprayer and the dilute solution liquid collecting tank are both connected with the compression refrigeration-solution regeneration coupling unit, a secondary fresh air inlet is formed in the top of one end of the shell, the secondary fresh air inlet is connected with a secondary fresh air pipeline through an air inlet branch pipe, and an air supply outlet is formed in the side face of the other end of the shell and is connected with the secondary fresh air pipeline through an air exhaust branch pipe.

Further, the concentrated solution spray chamber is provided with a second water baffle both in front and at the back.

Further, the air cooling unit comprises a shell and a finned tube surface cooler, wherein the finned tube surface cooler is arranged in the shell and connected with the compression refrigeration-solution regeneration coupling unit, the left end and the right end of the shell are provided with interfaces to be connected with a secondary fresh air pipeline, the bottom of the shell is provided with a condensed water collecting tank, and a condensed water drain port is arranged on the condensed water collecting tank.

Further, a filter screen is arranged in the shell and positioned at the air inlet interface.

Further, a third water baffle is arranged in the shell and positioned at the air outlet interface.

The utility model has the following effects:

according to the subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling, the interior of the shield tunnel is divided into the strict control area and the general control area, the air environment of the strict control area is cooled and dehumidified, the energy consumption of the subway shield environment air conditioning system is greatly reduced, and the two areas are separated by the air curtain, so that the influence of mutual circulation of air flows of the two areas on the refrigeration and dehumidification effects is prevented. And the dehumidification treatment of the solution dehumidification unit to the air flow, the cooling of the air cooling unit to the air flow and the dehumidification treatment are adopted, so that the temperature and humidity comfort of the air environment in a strictly controlled area is greatly improved, the humidity is particularly effectively reduced, and the dehumidification effect of the air conditioning system is greatly improved. Meanwhile, a compression refrigeration-solution regeneration coupling unit is also arranged to provide chilled water for the air cooling unit and provide concentrated solution for dehumidification for the solution dehumidification unit, so that the recycling of the chilled water and the dehumidification solution is realized.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural layout diagram of a subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to a preferred embodiment of the present utility model.

Fig. 3 is a schematic structural view of a compressed refrigeration-solution regeneration coupling unit according to a preferred embodiment of the present utility model.

Fig. 4 is a schematic structural view of a solution dehumidifier unit in accordance with a preferred embodiment of the present utility model.

Fig. 5 is a schematic view of the structure of an air cooling unit according to a preferred embodiment of the present utility model.

Description of the reference numerals

1. Compression refrigeration-solution regeneration coupling unit; 2. a solution dehumidifier unit; 3. an air cooling unit; 4. a secondary air blower; 5. a primary fresh air pipeline; 6. a secondary fresh air pipeline; 7. an air curtain; 8. a first damper; 9. a second air valve; 10. a third damper; 11. a chilled water pump; 12. a dilute solution pump; 13. a concentrated solution pump; 100. a tight control zone; 200. a general control area; 101. a unit housing; 102. a compressor; 103. a solution heater; 104. an air heater; 105. an expansion valve; 106. an evaporator; 107. a solution heat exchanger; 108. a dilute solution sprayer; 109. a concentrated solution collecting tank; 110. an axial flow fan; 111. a first water baffle; 112. a concentrated solution filter screen; 1011. an air inlet; 1012. an air outlet; 201. a housing; 202. a secondary fresh air port; 203. a concentrated solution sprayer; 204. a dilute solution collecting tank; 205. an air supply port; 206. a second water baffle; 207. a dilute solution filter screen; 301. a housing; 302. a finned tube surface cooler; 303. a condensed water collecting tank; 304. a condensed water drain port; 305. an interface; 306. an air filter screen; 307. and a third water baffle.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.

As shown in fig. 1 and 2, the preferred embodiment of the present utility model provides a subway shield environment air conditioning system with coupled compression refrigeration and solution dehumidification, which comprises a compression refrigeration-solution regeneration coupling unit 1, a solution dehumidification unit 2, an air cooling unit 3, a secondary air blower 4, a primary fresh air pipeline 5, a secondary fresh air pipeline 6, an air curtain 7, a first air valve 8, a second air valve 9 and a third air valve 10, wherein the air curtain 7 is arranged at a separation part of a strict control area 100 and a general control area 200 of a shield tunnel and is used for blocking airflow between the two areas. It will be appreciated that the area within the shield tunnel is divided into a tightly controlled area 100 and a generally controlled area 200, wherein the tightly controlled area 100 generally includes a main working area and a rest area for pipe installation, rest area, grouting working area, etc., while the generally controlled area 200 is generally an unmanned working area, the tightly controlled area 100 is generally designed with an ambient temperature of 26-28 ℃ and a humidity of not more than 70%, while the generally controlled area 200 is generally designed with a temperature of not more than 45 ℃. By dividing the shield tunnel into the strict control area 100 and the general control area 200, different subareas adopt different temperature and humidity designs, only the air environment of the strict control area 100 is required to be cooled and dehumidified, the energy consumption of the air conditioning system of the subway shield environment is greatly reduced, and the two areas are separated by the air curtain 7, so that the influence of the mutual circulation of air flows of the two areas on the refrigerating and dehumidifying effects is prevented. Wherein the air curtain 7 is preferably positioned at the rear end of the tight control zone 100, i.e. near the end of the general control zone 200. The primary fresh air pipeline 5 is used for introducing surface fresh air, the surface fresh air is introduced into the primary fresh air pipeline 5 through a primary fan (namely a tunnel ventilator), and the secondary fresh air pipeline 6 is intermittently connected with the primary fresh air pipeline 5 to form an airflow conveying channel. The secondary air blower 4, the first air valve 8 and the air cooling unit 3 are sequentially arranged on the secondary fresh air pipeline 6 along the airflow flowing direction, the secondary air blower 4 is used for pressurizing and conveying airflow, and the air cooling unit 3 is used for cooling and dehumidifying air. The compression refrigeration-solution regeneration coupling unit 1 is arranged in the general control area 200 and is connected with the primary fresh air pipeline 5 through an air inlet branch pipe, and the compression refrigeration-solution regeneration coupling unit 1 is also connected with the air cooling unit 3 to form a chilled water circulation pipeline. The solution dehumidifier unit 2 is connected with the secondary fresh air pipeline 6 through an air inlet branch pipe and an air exhaust branch pipe, the connection position of the air inlet branch pipe is positioned between the first air valve 8 and the secondary air blower 4, the connection position of the air exhaust branch pipe is positioned between the first air valve 8 and the air cooling unit 3, the second air valve 9 and the third air valve 10 are respectively and correspondingly arranged on the air inlet branch pipe and the air exhaust branch pipe of the solution dehumidifier unit 2, and the solution dehumidifier unit 2 is used for dehumidifying air flow. The solution dehumidifier unit 2 is also connected with a compression refrigeration-solution regeneration coupling unit 1 to form a solution circulation pipeline, and the compression refrigeration-solution regeneration coupling unit 1 is used for refrigerating circulated chilled water and converting circulated dilute solution into concentrated solution. It will be appreciated that when the compression refrigeration and solution regeneration coupling unit 1 is in operation, the compression refrigeration and solution regeneration coupling unit 1 may provide chilled water to the air cooling unit 3 and a concentrated solution for dehumidification to the solution dehumidification unit 2, respectively. When the first air valve 8 is closed, the second air valve 9 and the third air valve 10 are opened, the pressurized secondary fresh air is changed into dry air after dehumidification treatment of the solution dehumidifier unit 2 and then is conveyed back to the secondary fresh air pipeline 6, then is cooled by the air cooler unit 3, and finally is conveyed to a plurality of positions of the strict control area 100 through a plurality of post air inlets. It is understood that the solution for dehumidification may be an inorganic solution or a mixed solution of calcium chloride, lithium chloride, magnesium chloride, or the like. In addition, the primary fresh air pipeline 5 and the secondary fresh air pipeline 6 preferably adopt wear-resistant canvas blast pipes, have the advantages of simple structure, convenient adjustment of the position of the blast outlet and convenient installation, and are very suitable for shield tunnels with complex pipelines.

It can be understood that in the subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling of this embodiment, the shield tunnel is divided into the strict control area 100 and the general control area 200, and only the air environment of the strict control area 100 is required to be cooled and dehumidified, so that the energy consumption of the subway shield environment air conditioning system is greatly reduced, and the two areas are separated by using the air curtain 7, so that the influence of the mutual circulation of the air flows of the two areas on the refrigeration and dehumidification effects is prevented. In addition, the dehumidification treatment of the solution dehumidifier unit 2 to the air flow, the cooling of the air cooler unit 3 to the air flow and the dehumidification treatment greatly improve the temperature and humidity comfort of the air environment in the strict control area 100, particularly effectively reduce the humidity and greatly improve the dehumidification effect of the air conditioning system. Meanwhile, the compressed refrigeration-solution regeneration coupling unit 1 is also arranged to provide chilled water for the air cooling unit 3 and provide concentrated solution for dehumidification for the solution dehumidifier unit 2, so that the recycling of the chilled water and the dehumidified solution is realized.

Alternatively, the solution dehumidifier unit 2 and the air cooler unit 3 are both disposed in the strictly controlled area 100, so that the conveying distance of the low-temperature drying air flow can be shortened, thereby reducing the loss of cold energy. Of course, in other embodiments of the present utility model, the solution dehumidifier unit 2 and the air-cooling unit 3 may also be disposed in the general control area 200.

It can be understood that in the subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupled in this embodiment, by controlling the working states of the first air valve 8, the second air valve 9, the third air valve 10 and each unit, the operation modes can be switched. Specifically, when the temperature of the ground fresh air is lower, for example, lower than 20 ℃, the air conditioning system adopts a ventilation mode, in the ventilation mode, the first air valve 8 is opened, the second air valve 9 and the third air valve 10 are closed, and the compression refrigeration-solution regeneration coupling unit 1, the solution dehumidification unit 2 and the air cooling unit 3 do not work, so that the environmental comfort in the shield tunnel is met by introducing the ground low-temperature fresh air. When the ground fresh air temperature is higher but the air is drier, for example, the temperature is between 20 ℃ and 35 ℃ and the relative humidity is less than or equal to 50%, the air conditioning system adopts a single refrigeration mode, under the single refrigeration mode, the first air valve 8 is opened, the second air valve 9 and the third air valve 10 are closed, the compression refrigeration-solution regeneration coupling unit 1 and the air cooling unit 3 work, and the solution dehumidifying unit 2 does not work. When the ground fresh air is in a high-temperature and high-humidity state, for example, the temperature is more than 35 ℃ and the relative humidity is more than 50%, the air conditioning system adopts a refrigeration and dehumidification mode, and in the refrigeration and dehumidification mode, the first air valve 8 is closed, the second air valve 9 and the third air valve 10 are opened, and the compressed refrigeration and solution regeneration coupling unit 1, the solution dehumidification unit 2 and the air cooling unit 3 all work.

It can be understood that the subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling of the embodiment can be switched to an adaptive working mode according to the temperature and humidity state of the ground fresh air, the energy consumption of the air conditioning system can be effectively reduced while the cooling and dehumidification effects are ensured, and the installed capacity of the compression refrigeration can be reduced by 20% -35% compared with that of an air conditioning system adopting mechanical refrigeration alone. The working mode switching process can be that after the temperature and humidity of the surface air are monitored, the control of each air valve and each unit is realized in a manual control or automatic control mode, and the specific control process belongs to the prior art and is not repeated here.

It can be understood that the chilled water inlet of the compression refrigeration-solution regeneration coupling unit 1 is connected with the chilled water outlet of the air cooling unit 3 through a pipeline, the chilled water outlet of the compression refrigeration-solution regeneration coupling unit 1 is connected with the chilled water inlet of the air cooling unit 3 through a pipeline, and the pipeline is provided with a chilled water pump 11, so that a chilled water circulation pipeline is constructed between the compression refrigeration-solution regeneration coupling unit 1 and the air cooling unit 3, and chilled water after heat exchange with air in the air cooling unit 3 is refrigerated by the compression refrigeration-solution regeneration coupling unit 1 and then is conveyed to the air cooling unit 3, thereby realizing the recycling of chilled water. Similarly, the dilute solution inlet of the compression refrigeration-solution regeneration coupling unit 1 is connected with the dilute solution outlet of the solution dehumidifying unit 2 through a pipeline, the pipeline is provided with a dilute solution pump 12, the concentrated solution outlet of the compression refrigeration-solution regeneration coupling unit 1 is connected with the concentrated solution inlet of the solution dehumidifying unit 2 through a pipeline, the pipeline is provided with a concentrated solution pump 13, the concentrated solution in the solution dehumidifying unit 2 absorbs water in the air after the air is dehumidified to dilute the diluted solution, the diluted solution is conveyed into the compression refrigeration-solution regeneration coupling unit 1 to realize the regeneration of the concentrated solution, and the regenerated concentrated solution is conveyed into the solution dehumidifying unit 2, so that the concentrated solution for dehumidification is recycled.

It will be understood that, as shown in fig. 3, the compression refrigeration-solution regeneration coupling unit 1 includes a unit housing 101, a compressor 102, a solution heater 103, an air heater 104, an expansion valve 105, an evaporator 106, a solution heat exchanger 107, a dilute solution spray chamber, a concentrated solution sump 109, and an axial fan 110, wherein the unit housing 101 is divided into an upper part and a lower part by a partition plate, wherein the upper part is an airflow passage, and the compressor 102, the solution heater 103, the expansion valve 105, the evaporator 106, and the solution heat exchanger 107 are disposed at the lower part. An air inlet 1011 is formed in the top of one end of the unit housing 101, an air outlet 1012 is formed in the side surface of the other end of the upper portion, so that an upper air flow channel is formed, the air inlet 1011 is connected with the primary fresh air pipeline 5 through an air inlet branch pipe, and the air heater 104, the dilute solution spray chamber and the axial flow fan 110 are sequentially arranged in the upper air flow channel along the air flow direction. A dilute solution sprayer 108 is arranged in the dilute solution spraying chamber, the concentrated solution collecting tank 109 is positioned at the bottom of the dilute solution spraying chamber, the evaporator 106 is connected with the air cooling unit 3 to refrigerate circulated chilled water, and the evaporator 106, the compressor 102, the solution heater 103, the air heater 104 and the expansion valve 105 are sequentially connected to form a refrigerant circulation pipeline. Specifically, the chilled water inlet of the evaporator 106 is connected to the chilled water outlet of the air cooling unit 3, the chilled water outlet of the evaporator 106 is connected to the chilled water inlet of the air cooling unit 3, the refrigerant outlet of the compressor 102 is connected to the refrigerant inlet of the solution heater 103, the refrigerant outlet of the solution heater 103 is connected to the refrigerant inlet of the air heater 104, the refrigerant outlet of the air heater 104 is connected to the refrigerant inlet of the evaporator 106, and an expansion valve 105 is disposed on a pipeline connecting the two, and the refrigerant outlet of the evaporator 106 is connected to the refrigerant inlet of the compressor 102, thereby forming a closed refrigeration cycle. The solution heat exchanger 107 is connected with the solution dehumidifier unit 2, the solution heat exchanger 107, the solution heater 103 and the dilute solution sprayer 108 are sequentially connected, and the concentrated solution liquid collecting tank 109 is connected with the solution heat exchanger 107 to convert the circulated dilute solution into concentrated solution. Specifically, the dilute solution inlet of the solution heat exchanger 107 is connected to the dilute solution outlet of the solution dehumidifier unit 2, the dilute solution outlet of the solution heat exchanger 107 is connected to the solution inlet of the solution heater 103, the solution outlet of the solution heater 103 is connected to the dilute solution sprayer 108, the concentrated solution inlet of the solution heat exchanger 107 is connected to the concentrated solution liquid collecting tank 109, and the concentrated solution outlet of the concentrated solution heat exchanger 107 is connected to the solution dehumidifier unit 2.

It can be understood that the high-temperature and high-pressure gaseous refrigerant output by the compressor 102 flows through the solution heater 103 to exchange heat with the dilute solution, pre-condenses the high-temperature and high-pressure gaseous refrigerant while preheating the dilute solution, exchanges heat with the surface fresh air introduced by the air inlet 1011 again in the air heater 104, condenses into a high-temperature and high-pressure liquid refrigerant, passes through the expansion valve 105, is subjected to pressure reduction conversion into a low-temperature and low-pressure two-phase gaseous refrigerant, and is evaporated and absorbed in the evaporator 106 to refrigerate the chilled water, and the low-temperature and low-pressure two-phase gaseous refrigerant is converted into a low-temperature and low-pressure gaseous refrigerant to enter the compressor 102 again for compression. The diluted solution output by the solution dehumidifier unit 2 is subjected to primary heat exchange with circulating concentrated solution in the solution heat exchanger 107, then subjected to secondary heat exchange with high-temperature high-pressure gaseous refrigerant in the solution heater 103, then subjected to tertiary heat exchange with surface fresh air after heat exchange to form water mist in the diluted solution spray chamber, liquid water in the diluted solution is evaporated and taken away by air, the formed high-temperature concentrated solution is collected by the concentrated solution collecting tank 109, the high-temperature concentrated solution is conveyed to the solution dehumidifier unit 2 after being subjected to heat exchange and temperature reduction by the solution heat exchanger 107 and the imported diluted solution, and the high-temperature high-humidity air formed after heat exchange and water absorption is pumped by the axial flow fan 110 to be discharged to the general control area 200 from the air outlet 1012.

It can be understood that the high-temperature high-pressure gaseous refrigerant is cooled by introducing the surface fresh air, and the cooling water in the traditional water chilling unit is replaced by air cooling, so that on one hand, the capacity increase of the cooling tower, the addition of a cooling water pipeline and the initial investment cost and the running cost of the cooling water pump can be saved, and on the other hand, the occupied area of equipment is greatly reduced, and the air chilling unit is relatively simple in structure and low in construction difficulty.

Optionally, the front and rear of the dilute solution spraying chamber are respectively provided with a first water baffle 111 to prevent the solution in the spraying process from splashing. It can be appreciated that the first water baffle 111 is provided with a plurality of ventilation holes, which only allow air to circulate.

Optionally, a concentrated solution filter screen 112 is further disposed in the concentrated solution tank 109, for filtering the concentrated solution.

It will be appreciated that, as shown in fig. 4, the solution dehumidifier unit 2 includes a housing 201 and a concentrated solution spray chamber, the concentrated solution spray chamber is disposed inside the housing 201, a concentrated solution sprayer 203 is disposed in the concentrated solution spray chamber, a dilute solution liquid collecting tank 204 is disposed at the bottom of the concentrated solution spray chamber, and the concentrated solution sprayer 203 and the dilute solution liquid collecting tank 204 are both connected with the compression refrigeration-solution regeneration coupling unit 1. Specifically, the concentrated solution sprayer 203 is connected to a concentrated solution outlet of the solution heat exchanger 107, and the dilute solution liquid collecting tank 204 is connected to a dilute solution inlet of the solution heat exchanger 107. The top of one end of the shell 201 is provided with a secondary fresh air port 202, the secondary fresh air port 202 is connected with the secondary fresh air pipeline 6 through an air inlet branch pipe, the side surface of the other end of the shell 201 is provided with an air supply port 205, and the air supply port 205 is connected with the secondary fresh air pipeline 6 through an air exhaust branch pipe.

It can be understood that the secondary fresh air port 202 introduces secondary fresh air from the secondary fresh air pipeline 6, and after the secondary fresh air port is fully subjected to heat-moisture exchange with the low-temperature concentrated solution in the concentrated solution spray chamber, the secondary fresh air port is conveyed into the secondary fresh air pipeline 6 again, and the concentrated solution absorbs moisture in the air to be changed into a dilute solution and is collected in the dilute solution collecting tank 204. The whole solution dehumidifier unit 2 has a simple structure, can realize the recycling of the dehumidifying solution, and has low maintenance cost.

Optionally, a second water baffle 206 is disposed at the front and rear of the concentrated solution spraying chamber to prevent the solution from splashing during spraying. It will be appreciated that the second water baffle 206 is provided with a plurality of ventilation holes, which only allow air to circulate.

Optionally, a dilute solution filter screen 207 is disposed in the dilute solution tank 204, for filtering the dilute solution.

It will be appreciated that, as shown in fig. 5, the air-cooling unit 3 includes a housing 301 and a finned tube surface cooler 302, and the finned tube surface cooler 302 is disposed within the housing 301 and is connected to the compressed refrigeration-solution regeneration coupling unit 1, specifically, to the chilled water inlet and the chilled water outlet of the evaporator 106. The left and right ends of the shell 301 are provided with interfaces 305 to be connected with the secondary fresh air pipeline 6, the bottom of the shell 301 is provided with a condensed water collecting tank 303, and the condensed water collecting tank 303 is provided with a condensed water drain port 304. Wherein the interface 305 is preferably a dome-shaped interface. The air flow introduced from one end of the shell 301 exchanges heat with chilled water flowing in the finned tube surface cooler 302 sufficiently to cool and dehumidify the air flow, and then is conveyed to the secondary fresh air pipeline 6 from the other end of the shell 301, and finally is conveyed to a plurality of posts of the strict control area 100 through the tail end pipeline and the post air supply opening. And the condensed water formed on the surface of the fin-tube surface cooler 302 is collected by the condensed water collecting tank 303 and discharged through the condensed water drain port 304.

It can be understood that the air cooling unit 3 adopts a left-right penetrating structure, so that the heat exchange time and heat exchange area of air flow and chilled water can be effectively increased, the air flow cooling effect is improved, and the structure is quite simple.

Optionally, an air filter screen 306 is disposed in the housing 301 at the air inlet interface for filtering the incoming airflow.

Optionally, a third water baffle 307 is disposed in the housing 301 at the air outlet port to prevent condensed water from being carried away by the air flow. It will be appreciated that the third water baffle 307 is provided with a plurality of ventilation holes, which only allow air to circulate.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a subway shield environment air conditioning system of compression refrigeration and solution dehumidification coupling, characterized by, including compression refrigeration-solution regeneration coupling unit (1), solution dehumidification unit (2), air cooling unit (3), secondary air fan (4), primary fresh air pipeline (5), secondary fresh air pipeline (6), air curtain (7), first air valve (8), second air valve (9) and third air valve (10), air curtain (7) set up in the separation department of shield tunnel's strict control district (100) and general control district (200) for block the air current flow between the two areas, primary fresh air pipeline (5) are used for introducing the earth's surface fresh air, secondary air pipeline (6) with primary fresh air pipeline (5) are connected in order to form the air current delivery channel, secondary air fan (4), first air valve (8) and air cooling unit (3) are set up in proper order along the air current flow direction secondary fresh air pipeline (6), secondary air fan (4) are used for carrying out the pressurization to the air current, air cooling unit (3) are used for carrying out cooling and coupling and cooling down in the cooling branch pipe (1) and are connected in the cooling and general air regeneration district (200) through the cooling and air current coupling district (5), the compression refrigeration-solution regeneration coupling unit (1) is further connected with the air cooling unit (3) to form a chilled water circulation pipeline, the solution dehumidification unit (2) is connected with the secondary fresh air pipeline (6) through an air inlet branch pipe and an air outlet branch pipe, the connection position of the air inlet branch pipe is located between a first air valve (8) and a secondary air blower (4), the connection position of the air outlet branch pipe is located between the first air valve (8) and the air cooling unit (3), a second air valve (9) and a third air valve (10) are respectively and correspondingly arranged on the air inlet branch pipe and the air outlet branch pipe of the solution dehumidification unit (2), the solution dehumidification unit (2) is used for dehumidifying air flow, the solution dehumidification unit (2) is further connected with the compression refrigeration-solution regeneration coupling unit (1) to form a solution circulation pipeline, and the compression refrigeration-solution regeneration coupling unit (1) is used for refrigerating circulated chilled water and converting circulated dilute solution into concentrated solution.

2. The subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling according to claim 1, wherein the solution dehumidification unit (2) and the air cooling unit (3) are arranged in a strict control area (100).

3. The subway shield environment air conditioning system with compression refrigeration and solution dehumidification coupling according to claim 1, wherein in a ventilation mode, the first air valve (8) is opened, the second air valve (9) and the third air valve (10) are closed, and the compression refrigeration-solution regeneration coupling unit (1), the solution dehumidification unit (2) and the air cooling unit (3) do not work; in a single refrigeration mode, the first air valve (8) is opened, the second air valve (9) and the third air valve (10) are closed, the compression refrigeration-solution regeneration coupling unit (1) and the air cooling unit (3) work, and the solution dehumidifying unit (2) does not work; in the refrigeration and dehumidification mode, the first air valve (8) is closed, the second air valve (9) and the third air valve (10) are opened, and the compression refrigeration-solution regeneration coupling unit (1), the solution dehumidification unit (2) and the air cooling unit (3) all work.

4. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 1, wherein the compression refrigeration-solution regeneration coupling unit (1) comprises a unit shell (101), a compressor (102), a solution heater (103), an air heater (104), an expansion valve (105), an evaporator (106), a solution heat exchanger (107), a dilute solution spray chamber, a concentrated solution collecting tank (109) and an axial flow fan (110), the unit shell (101) is internally divided into an upper part and a lower part, the compressor (102), the solution heater (103), the expansion valve (105), the evaporator (106) and the solution heat exchanger (107) are arranged at the lower part, an air inlet (1011) is formed at the top of the unit shell (101), an air outlet (1012) is formed at the side surface of the upper part, the air inlet (1011) is connected with a primary fresh air pipeline (5) through an air inlet branch pipe, the air heater (104), the dilute solution spray chamber and the fan (110) are sequentially arranged in the upper part of the air flow channel along the airflow direction, the dilute solution spray chamber (108) is arranged in the axial flow direction, the dilute solution spray chamber (108) is arranged in the air flow direction is connected with the dilute solution spray chamber (108) at the bottom of the air flow direction, the air heater (1011) is arranged at the side of the upper part, and the side of the air heater (1011) is connected with the side face of the upper part, and the air heater (1011) to form an air outlet (1012) and the air outlet, and evaporator (106), compressor (102), solution heater (103), air heater (104) and expansion valve (105) connect gradually in order to form refrigerant circulation pipeline, solution heat exchanger (107) are connected with solution dehumidification unit (2), just solution heat exchanger (107), solution heater (103), thin solution spray ware (108) connect gradually, thick solution collecting tank (109) with solution heat exchanger (107) are connected to change the thin solution of circulation into thick solution.

5. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 4, wherein the front and rear of the dilute solution spray chamber are provided with first water baffles (111).

6. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 1, wherein the solution dehumidification unit (2) comprises a shell (201) and a concentrated solution spray chamber, the concentrated solution spray chamber is arranged inside the shell (201), a concentrated solution sprayer (203) is arranged in the concentrated solution spray chamber, a dilute solution liquid collecting tank (204) is arranged at the bottom of the concentrated solution spray chamber, the concentrated solution sprayer (203) and the dilute solution liquid collecting tank (204) are both connected with the compression refrigeration-solution regeneration coupling unit (1), a secondary fresh air port (202) is formed in the top of one end of the shell (201), the secondary fresh air port (202) is connected with a secondary fresh air pipeline (6) through an air inlet branch pipe, an air supply port (205) is formed in the side face of the other end of the shell (201), and the air supply port (205) is connected with the secondary fresh air pipeline (6) through an air exhaust branch pipe.

7. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 6, wherein the concentrated solution spray chamber is provided with a second water baffle (206) at the front and rear.

8. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 1, wherein the air cooling unit (3) comprises a shell (301) and a finned tube surface cooler (302), the finned tube surface cooler (302) is arranged in the shell (301) and is connected with the compression refrigeration-solution regeneration coupling unit (1), interfaces (305) are arranged at the left end and the right end of the shell (301) to be connected with a secondary fresh air pipeline (6), a condensed water collecting tank (303) is arranged at the bottom of the shell (301), and a condensed water drain outlet (304) is arranged on the condensed water collecting tank (303).

9. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 8, wherein an air filter screen (306) is arranged in the shell (301) and positioned at an air inlet interface.

10. The subway shield environment air conditioning system coupled with compression refrigeration and solution dehumidification according to claim 8, wherein a third water baffle (307) is arranged in the shell (301) and positioned at an air outlet interface.

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