High-efficiency heat exhaust system for subway station air conditioning combined with exhaust air duct

Abstract

An efficient heat exhaust system for subway station air conditioning combined with an exhaust air duct, which includes an intake air duct and an exhaust air duct. An efficient heat exhaust device combined with water spray is arranged in the exhaust air duct, and a water pump, a heat exchanger, a compressor, an expansion valve, a direct expansion refrigerant air conditioning unit, an outdoor unit of a water-cooled multi-connected air conditioner, and a water-cooled chiller are arranged in the ventilation and air conditioning machine room. The efficient heat exhaust device, the water pump, the water valve, the heat exchanger, the outdoor unit of the water-cooled multi-connected air conditioner, and the water-cooled chiller are connected through inlet and outlet cooling water pipelines; the heat exchanger, the compressor, the expansion valve, and the direct expansion refrigerant air conditioning unit are connected through refrigerant pipelines. The beneficial effects of the present invention are: having a simple structure, convenient control, reasonable structure for easy installation, high heat exchange efficiency combined with water spray, high heat exchange efficiency of direct expansion of refrigerant, canceling the ground cooling tower, reducing the energy consumption of refrigerant transportation, reducing the area of the station machine room, and being safe and reliable in use.

Description

Technical Field

[0001] The present invention relates to the technical field of large air-conditioning for subway underground stations, and is an efficient heat exhaust system for subway station air-conditioning combined with an exhaust duct, which combines the characteristics of the subway. Background Art

[0002] Currently, the traditional subway station air-conditioning system generally sets up a cooling tower on the ground, a refrigeration machine room in the station, a water-cooled chiller, a chilled water pump and a cooling water pump in the refrigeration machine room, and the terminal equipment of the air-conditioning system adopts the form of a water-cooled heat exchanger.

[0003] After years of operation, the following problems have been summarized in the traditional subway air-conditioning system:

[0004] (1) A cooling tower needs to be set up on the ground, resulting in problems such as large floor area, noise pollution, water drift, and poor landscape.

[0005] (2) A refrigeration machine room with an area of hundreds of square meters needs to be set up in the underground station, increasing the civil engineering investment and construction difficulty.

[0006] (3) When using chilled water to transport cold, there are problems such as large pump energy consumption, complex system control, and poor actual operation effect.

[0007] The above problems are urgent problems to be solved in the design of the subway ventilation and air-conditioning system. Summary of the Invention

[0008] The purpose of the present invention is to provide an efficient heat exhaust system for subway station air-conditioning combined with an exhaust duct, which has many advantages such as simple structure, convenient control, reasonable structure for easy installation, cancellation of the ground cooling tower, reduction of refrigerant transportation energy consumption, reduction of the station machine room area, and safe and reliable use.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] An efficient heat exhaust system for subway station air conditioning combined with an exhaust air duct, which includes an intake air duct (1), an exhaust air duct (2), and a ventilation and air conditioning machine room. It is characterized in that a partition (5) is provided between the intake air duct (1) and the exhaust air duct (2), and this partition is arranged on both sides of the upper part inside the exhaust air duct (2). The lower end of the intake air duct (1) is in a closed state, and the outer side of the upper end of the intake air duct (1) is a fresh air inlet (31). On both sides of the partition inside the exhaust air duct (2), an efficient heat exhaust device (4) combined with water spray is respectively provided, which is communicated with the intake air duct (1); a water pump (6), a heat exchanger (9), a compressor (10), an expansion valve (11), a refrigerant direct expansion air conditioning unit (13), a water-cooled multi-connected outdoor unit (14), and a water-cooled chiller (15) are arranged in the ventilation and air conditioning machine room; the inlet cooling water pipelines (71) of the efficient heat exhaust device (4) are respectively connected to the outlet cooling water ends of the heat exchanger (9), the water-cooled multi-connected outdoor unit (14), and the water-cooled chiller (15) in the ventilation and air conditioning machine room, and the outlet cooling water pipelines (72) of the efficient heat exhaust device (4) are respectively connected to the inlet cooling water ends of the heat exchanger (9), the water-cooled multi-connected outdoor unit (14), and the water-cooled chiller (15) in the ventilation and air conditioning machine room.

[0011] , wherein, a filter (3) is provided at the fresh air inlet (31). After the fresh air enters the intake air duct (1) and passes through the efficient heat exhaust device (4) and enters the exhaust air duct (2), the included angle between the inlet air flow direction and the outlet air flow direction of the exhaust air duct (2) is not less than 90°, which can effectively prevent the exhaust air from entering the intake air duct (1).

[0012] Among them, the efficient heat exhaust device (4) consists of multiple modules, which are respectively arranged on both sides of the partition (5) inside the exhaust air duct (2). A downward spray head (51) is provided in the upper part of each module, and this spray head (51) is connected to the outlet cooling water pipeline (72). The lower end of the efficient heat exhaust device (4) is connected to the inlet cooling water pipeline (71).

[0013] Among them, the efficient heat exhaust device (4) is equipped with a fan (17). The fan is arranged on one side of the intake air duct (1), and a filler (16) is arranged behind the fan. The outdoor air is drawn from the intake air duct (1), and the outdoor air sequentially passes through the filter (3), the intake air duct (1), and the efficient heat exhaust device (4), and then is discharged to the outside through the exhaust air duct (2); when the air flows through the filler (16) inside the efficient heat exhaust device (4), heat and mass transfer occurs with the cooling spray water, and the cooling water after heat and mass transfer is distributed to the heat exchanger (9), the water-cooled multi-connected outdoor unit (14), and the water-cooled chiller (15) through the water pump (6).

[0014] Among them, the heat exchanger (9), the compressor (10), the expansion valve (11), and the refrigerant direct expansion air conditioning unit (13) are connected through a refrigerant pipeline (12).

[0015] Among them, the heat exchanger (9), the compressor (10), the expansion valve (11) and the refrigerant pipeline (12) are integrated inside the direct-expansion refrigerant air-conditioning unit (13).

[0016] The present invention has an air inlet duct and an air outlet duct. An efficient heat rejection device combined with water spray is arranged in the air outlet duct, and a water pump, a heat exchanger, a compressor, an expansion valve, a direct-expansion refrigerant air-conditioning unit, an outdoor unit of a water-cooled multi-connected air conditioner, a water-cooled chiller, etc. are arranged in the ventilation and air-conditioning machine room. The efficient heat rejection device, the water pump, the water valve, the heat exchanger, the outdoor unit of the water-cooled multi-connected air conditioner, and the water-cooled chiller are connected through an inlet cooling water pipeline and an outlet cooling water pipeline; the heat exchanger, the compressor, the expansion valve, and the direct-expansion refrigerant air-conditioning unit are connected through a refrigerant pipeline.

[0017] The efficient heat rejection device consists of multiple modules, and the installation and operation quantity of the modules can be determined according to requirements, improving the operation flexibility of the unit.

[0018] The efficient heat rejection device is equipped with a fan, which draws air from the air inlet duct. The outdoor air sequentially flows through the filter, the air inlet duct, and the efficient heat rejection device, and then is discharged to the outside through the air outlet duct. When the air flows through the packing inside the efficient heat rejection device, heat and mass transfer occurs with the cooling spray water, and the cooling water after heat and mass transfer is distributed to the heat exchanger, the outdoor unit of the water-cooled multi-connected air conditioner, and the water-cooled chiller through the water pump.

[0019] The inside of the efficient heat rejection device is provided with packing, and water spray is arranged above the packing. The air introduced from the fresh air duct or the air outlet duct undergoes heat and mass transfer with the cooling spray water when flowing through the packing, and the air after completing heat and mass transfer enters the air outlet duct and is discharged to the outside.

[0020] The cooling water that has completed heat and mass transfer in the efficient heat rejection device is distributed to the heat exchanger, the outdoor unit of the water-cooled multi-connected air conditioner, and the water-cooled chiller through the water pump, and the cooling water after heat exchange with the above equipment returns to the efficient heat rejection device to conduct heat and mass transfer again.

[0021] The heat exchanger, the compressor, the expansion valve, and the direct-expansion refrigerant air-conditioning unit are connected through a refrigerant pipeline. As a preferred solution, the heat exchanger, the compressor, the expansion valve, and the refrigerant pipeline can be integrated inside the direct-expansion refrigerant air-conditioning unit, thus saving floor space.

[0022] As a preferred solution, the cooling water treated by the efficient heat rejection device is connected to the direct-expansion refrigerant air-conditioning unit (the heat exchanger, the compressor, the expansion valve, and the refrigerant pipeline are integrated inside), and the outdoor unit of the water-cooled multi-connected air conditioner. By canceling the chilled water, the heat exchange efficiency is improved and the conveying energy consumption is reduced.

[0023] The efficient heat rejection device adopts a modular design.

[0024] The advantages of the present invention are as follows: It has a simple structure, convenient control, reasonable structure for easy installation, eliminates the ground cooling tower, reduces the energy consumption of refrigerant transportation, reduces the area of the station machine room, and is safe and reliable in use. Brief Description of the Drawings

[0025] Figure 1 The working schematic diagram of the high-efficiency heat exhaust system for the air conditioning of a subway station combined with the exhaust duct is given.

[0026] Reference Signs: 1, intake duct; 2, exhaust duct; 3, filter; 31, fresh air inlet; 4, high-efficiency heat exhaust device; 5, partition; 51, spray head; 6, water pump; 71, inlet cooling water pipeline; 72, outlet cooling water pipeline; 8, water valve; 9, heat exchanger; 10, compressor; 11, expansion valve; 12, refrigerant pipeline; 13, direct expansion type refrigerant air conditioner unit; 14, water-cooled multi-connected outdoor unit; 15, water-cooled chiller; 16, packing; 17, fan. Detailed Embodiment

[0027] See Figure 1 As shown: A high-efficiency heat exhaust system for the air conditioning of a subway station combined with the exhaust duct, which includes an intake duct 1, an exhaust duct 2, and a ventilation and air conditioning machine room. A partition 5 is provided between the intake duct 1 and the exhaust duct 2. The partition is provided on both sides of the upper part inside the exhaust duct 2. The lower end of the intake duct 1 is closed, and the outer side of the upper end of the intake duct 1 is the fresh air inlet 31. High-efficiency heat exhaust devices 4 combined with water spray are respectively provided on both sides of the partition inside the exhaust duct 2 and communicate with the intake duct 1; A water pump 6, a heat exchanger 9, a compressor 10, an expansion valve 11, a direct expansion type refrigerant air conditioner unit 13, a water-cooled multi-connected outdoor unit 14, and a water-cooled chiller 15 are provided in the ventilation and air conditioning machine room; The inlet cooling water pipeline 71 of the high-efficiency heat exhaust device 4 is respectively connected to the outlet cooling water ends of the heat exchanger 9, the water-cooled multi-connected outdoor unit 14, and the water-cooled chiller 15 in the ventilation and air conditioning machine room, and the outlet cooling water pipeline 72 of the high-efficiency heat exhaust device 4 is respectively connected to the inlet cooling water ends of the heat exchanger 9, the water-cooled multi-connected outdoor unit 14, and the water-cooled chiller 15 in the ventilation and air conditioning machine room.

[0028] , wherein, a filter 3 is provided at the fresh air inlet 31. The included angle between the inlet air flow direction of the fresh air entering the intake duct 1 through the high-efficiency heat exhaust device 4 and the outlet air flow direction of the exhaust duct 2 is not less than 90°, which can effectively prevent the exhaust air from entering the intake duct 1.

[0029] Among them, the high-efficiency heat exhaust device 4 consists of multiple modules (in this embodiment, two modules are respectively arranged on the two side partitions). The high-efficiency heat exhaust device 4 is respectively arranged on both sides of the partition 5 in the exhaust air duct 2. In each module, a downward spray head 51 is arranged at the upper part, and the spray head 51 is connected to the outlet cooling water pipeline 72. The lower end of the high-efficiency heat exhaust device 4 is connected to the inlet cooling water pipeline 71, and the thickness of a single module does not exceed 0.5 meters.

[0030] Among them, the high-efficiency heat exhaust device 4 is equipped with a fan 17 by itself. The fan 17 is arranged on one side of the air inlet duct 1. A filler 16 is arranged behind the fan 17. Fresh air is introduced from the air inlet duct 1, and outdoor air sequentially flows through the filter 3, the air inlet duct 1, and the high-efficiency heat exhaust device 4, and then is discharged to the outdoor through the exhaust air duct 2 to the outdoor exhaust well of the station; when the air flows through the filler 16 inside the high-efficiency heat exhaust device 4, heat and mass transfer occurs with the cooling spray water sprayed by the spray head 51. After the heat and mass transfer is completed, the cooling water is distributed to the heat exchanger 9, the outdoor unit 14 of the water-cooled multi-connected air conditioner, and the water-cooled chiller 15 by the water pump 6.

[0031] Among them, the heat exchanger 9, the compressor 10, the expansion valve 11, and the refrigerant direct expansion air conditioning unit 13 are connected through a refrigerant pipeline 12.

[0032] Among them, the heat exchanger 9, the compressor 10, the expansion valve 11, and the refrigerant pipeline 12 are integrated inside the refrigerant direct expansion air conditioning unit 13.

[0033] The present invention has an air inlet duct 1 and an exhaust air duct 2. A high-efficiency heat exhaust device 4 combined with water spray is arranged in the exhaust air duct 2. A water pump 6, a heat exchanger 9, a compressor 10, an expansion valve 11, a refrigerant direct expansion air conditioning unit 13, an outdoor unit 14 of a water-cooled multi-connected air conditioner, a water-cooled chiller 15, etc. are arranged in the ventilation and air conditioning machine room. The high-efficiency heat exhaust device 4, the water pump 6, the water valve 8, the heat exchanger 9, the outdoor unit 14 of the water-cooled multi-connected air conditioner, and the water-cooled chiller 15 are connected through an inlet cooling water pipeline 71 and an outlet cooling pipeline 72; the heat exchanger 9, the compressor 10, the expansion valve 11, and the refrigerant direct expansion air conditioning unit 13 are connected through a refrigerant pipeline 12.

[0034] The high-efficiency heat exhaust device 4 consists of multiple modules, and the installation and operation quantity of the modules can be determined according to requirements, improving the flexibility of the unit operation.

[0035] The high-efficiency heat exhaust device 4 is equipped with a fan by itself, draws air from the air inlet duct 1, and outdoor air sequentially flows through the filter 3, the air inlet duct 1, and the high-efficiency heat exhaust device 4, and then is discharged to the outdoor through the exhaust air duct 2. When the air flows through the filler 16 inside the high-efficiency heat exhaust device 4, heat and mass transfer occurs with the cooling spray water, and after the heat and mass transfer is completed, the cooling water is distributed to the heat exchanger 9, the outdoor unit 14 of the water-cooled multi-connected air conditioner, and the water-cooled chiller 15 by the water pump 6.

[0036] Inside the high-efficiency heat exhaust device 4, there is a packing 16, and a spray head 51 is arranged above the packing 16. The air introduced from the fresh air inlet duct or the exhaust duct exchanges heat and mass with the cooling spray water when flowing through the packing. The air that has completed the heat and mass exchange enters the exhaust duct and is discharged outdoors.

[0037] The cooling water that has completed the heat and mass exchange in the high-efficiency heat exhaust device is distributed to the heat exchanger, the outdoor unit of the water-cooled multi-connected air conditioner, and the water-cooled chiller through a water pump. The cooling water that has exchanged heat with the above-mentioned equipment returns to the high-efficiency heat exhaust device and conducts heat and mass exchange again.

[0038] The heat exchanger 9, the compressor 10, the expansion valve 11, and the refrigerant direct expansion type air conditioner 13 are connected by a refrigerant pipeline 12. As a preferred solution, the heat exchanger, the compressor, the expansion valve, and the refrigerant pipeline can be integrated inside the refrigerant direct expansion type air conditioner unit, thus saving floor space.

[0039] As a preferred solution, the cooling water treated by the high-efficiency heat exhaust device is connected to the refrigerant direct expansion type air conditioner unit (the heat exchanger, the compressor, the expansion valve, and the refrigerant pipeline are integrated inside), and the outdoor unit of the water-cooled multi-connected air conditioner. By eliminating the chilled water, the heat exchange efficiency is improved and the transmission energy consumption is reduced.

[0040] The above is the preferred embodiment of the present invention and the technical principles applied. For those skilled in the art, any obvious changes such as equivalent transformations and simple substitutions based on the technical solution of the present invention without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention.

Claims

1. A subway station air conditioning high-efficiency heat removal system combined with an exhaust duct, comprising an air inlet duct (1), an exhaust duct (2), and a ventilation and air conditioning machine room, characterized in that: A partition (5) is provided between the air inlet duct (1) and the air exhaust duct (2), and the partition is provided on both sides of the upper portion of the air exhaust duct (2). The lower end of the air inlet duct (1) is closed, and the outer side of the upper end of the air inlet duct (1) is a fresh air inlet (31). High-efficiency heat removal devices (4) connected to the air inlet duct (1) and combined with water spray are provided on both sides of the partition in the air exhaust duct (2). A water pump (6), a heat exchanger (9), a compressor (10), an expansion valve (11), a refrigerant direct expansion air conditioning unit (13) are provided in the ventilation and air conditioning room. ), a water-cooled multi-split outdoor unit (14), and a water-cooled chiller (15); the inlet cooling water pipe (71) of the high-efficiency heat removal device (4) is respectively connected to the heat exchanger (9), the water-cooled multi-split outdoor unit (14), and the outlet cooling water end of the water-cooled chiller (15) in the ventilation and air-conditioning room; the outlet cooling water pipe (72) of the high-efficiency heat removal device (4) is respectively connected to the inlet cooling water end of the heat exchanger (9), the water-cooled multi-split outdoor unit (14), and the water-cooled chiller (15) in the ventilation and air-conditioning room; A filter (3) is provided at the fresh air inlet (31). After the fresh air enters the air inlet duct (1), it passes through the high-efficiency heat removal device (4) and enters the exhaust duct (2). The included angle between the inlet airflow direction and the outlet airflow direction of the exhaust duct (2) is not less than 90°, which can effectively prevent the exhaust air from entering the air inlet duct (1). The high-efficiency heat removal device (4) is composed of multiple modules, which are respectively arranged on both sides of the partition (5) in the exhaust duct (2).

2. The subway station air conditioning high-efficiency heat removal system combined with exhaust duct according to claim 1 is characterized in that: A downward spraying water head (51) is provided in the upper part of each module. The spraying water head (51) is connected to the outlet cooling water pipeline (72). The lower end of the high-efficiency heat removal device (4) is connected to the inlet cooling water pipeline (71).

3. The subway station air conditioning high-efficiency heat removal system combined with exhaust duct according to claim 2, characterized in that: The high-efficiency heat removal device (4) is equipped with a blower (17), which is arranged on one side of the air inlet duct (1). A filler (16) is arranged at the rear of the blower to draw air from the air inlet duct (1). Outdoor air flows through the filter (3), the air inlet duct (1), the high-efficiency heat removal device (4) in sequence, and is then discharged to the outside through the exhaust duct (2); When the air flows through the internal filler (16) of the high-efficiency heat removal device (4), it exchanges heat and mass with the cooling spray water. After the heat and mass exchange is completed, the cooling water is distributed to the heat exchanger (9), the water-cooled multi-split outdoor unit (14) and the water-cooled chiller (15) through the water pump (6).

4. The subway station air conditioning high-efficiency heat removal system combined with exhaust duct according to claim 3 is characterized in that: The heat exchanger (9), the compressor (10), the expansion valve (11), and the refrigerant direct expansion air conditioning unit (13) are connected via a refrigerant pipeline (12).

5. The subway station air conditioning high-efficiency heat removal system combined with exhaust duct according to claim 4 is characterized in that: The heat exchanger (9), the compressor (10), the expansion valve (11) and the refrigerant pipeline (12) are integrated inside the refrigerant direct expansion air conditioning unit (13).

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