CN218269377U - Bypass type evaporative cooling direct-expansion type ventilation air-conditioning system for exhaust duct of subway station - Google Patents
Bypass type evaporative cooling direct-expansion type ventilation air-conditioning system for exhaust duct of subway station Download PDFInfo
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- CN218269377U CN218269377U CN202222109470.4U CN202222109470U CN218269377U CN 218269377 U CN218269377 U CN 218269377U CN 202222109470 U CN202222109470 U CN 202222109470U CN 218269377 U CN218269377 U CN 218269377U
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Abstract
The utility model provides a formula ventilation air conditioning system is directly expanded in subway station exhaust duct by-pass evaporative cooling, including blast gate A, modular evaporative cooling directly expand heat transfer device, exhaust fan etc. the exhaust duct internal fixation has blast gate A, modular evaporative cooling directly to expand heat transfer device and exhaust fan, modular evaporative cooling directly expands one side of heat transfer device and hugs closely blast gate A, the opposite side is hugged closely the inside wall of exhaust duct, the other piston wind channel that is provided with of exhaust duct, the exhaust duct is provided with blast gate B with the intercommunication department in piston wind channel, blast gate B is located between modular evaporative cooling directly expands heat transfer device and the exhaust fan, modular evaporative cooling directly expands heat transfer device and directly expands air conditioning unit connection through refrigerant pipeline and directly. The utility model discloses the form is simple, maintain convenient, practice thrift the energy consumption, can carry out the mode switch according to regional annual climate change, satisfies the safe operation of each mode such as subway station ventilation, air conditioner, conflagration operating mode.
Description
Technical Field
The utility model belongs to subway station air conditioning system field, in particular to subway station exhaust duct bypass type evaporative cooling directly expands formula ventilation air conditioning system.
Background
The ventilation and air-conditioning system for the domestic project public area generally adopts a double-end air supply mode. The large and small ends of the equipment are respectively provided with a public area environment control machine room, a combined air conditioning unit and an exhaust fan are arranged in the machine room, and the load of each load station hall and the ventilation air conditioner of one half of the public area of the station platform are borne.
The ventilation air-conditioning system mostly adopts the scheme that a refrigerating machine room and an air-conditioning machine room are arranged underground, and a cooling tower is arranged on the ground. The system is stable and reliable according to the operation of the system in various places for many years, but with the increasing development of rail transit, the system has the following optimization space: 1. the ground of the cooling tower occupies large area, and if the cooling tower is arranged on the ground, the problems of large occupied area, noise pollution, water floating, poor landscape and the like can be caused. 2. The heat exchange efficiency of the ventilation air-conditioning system is low, the traditional air-conditioning system needs to take underground heat out of a room through 5 times of heat exchange, and the problem of long-distance conveying of refrigerant media exists. 3. The construction scale of the subway station is large, the area of a refrigerating machine room arranged underground is hundreds of square meters, and the construction scale of the station and the civil engineering investment are increased. Therefore, the ventilation and air-conditioning system of the existing subway station is to be optimized.
The direct-expansion air conditioning system comprises a compression condensing unit, an evaporation unit, an air filter, a blower, a silencer and other air processing functional units. Compared with the conventional centralized air-conditioning system, the refrigeration system and the air heat exchange system are integrated, the refrigerant is directly used for cooling and processing indoor air, a refrigerating water system and a refrigerating water pump are omitted, and the cold quantity conveying link of a cold-carrying medium loop is reduced, so that the running energy consumption is greatly reduced, the heat exchange loss in the traditional cold quantity conveying process is relatively reduced, the evaporation temperature of a unit is relatively increased, and the refrigerating efficiency of the unit is improved. In northern areas, ventilation and no heating are only carried out in public areas of subway underground stations in winter, the problem of frost of the surface coolers in winter can be solved by adopting the direct expansion type air conditioning unit, and compared with a traditional centralized air conditioning system, the maintenance workload of draining, drying or filling antifreeze liquid in the surface coolers in winter is correspondingly reduced.
The existing direct expansion type air conditioning system cannot be directly used for a subway station, and mainly has the following problems:
(1) The traditional direct expansion plate is relatively fixed in installation mode and cannot be effectively combined with a station system. The traditional direct expansion plate exchange installation modes mainly comprise two modes. The other is an independent air duct type direct expansion plate exchange installation mode, an independent air duct is reserved for radiating heat of the plate exchange, and the evaporative condenser + the evaporative compression air supply unit, the evaporative condenser + the compressor unit + the evaporative air supply unit, the evaporative condensation compression condensation unit + the evaporative air supply unit can be respectively arranged at positions of an air exhaust channel, an indoor unit room and the like according to different functions. The other type is a combined direct expansion plate exchange installation mode of an exhaust duct, a ventilation and air-conditioning integrated system is combined with an interval tunnel accident ventilation system under the working condition of exhaust smoke at ordinary times, a ventilation and air-conditioning integrated system is combined with a station public area ventilation air conditioner, an evaporative condenser is placed in an underground tunnel space, the evaporative condenser is designed into an electric rotatable opening type structure, the evaporative condenser can be controlled to be rotated and opened under the ventilation working condition and the smoke exhaust working condition in the transition season, and partial exhaust resistance is reduced. The two installation modes are relatively fixed installation modes, one mode is that an independent air channel is needed to be installed, the other mode is that the air channel can be used simultaneously, but equipment is independent relative to the whole ventilation system and cannot be effectively combined, the internal resistance of the exhaust channel is large, and the ventilation effect is poor.
(2) And under the smoke exhaust working condition, the safety guarantee rate is low. For the exhaust duct combined type direct expansion plate exchange installation mode, the device is installed in the exhaust duct, the evaporative condenser is designed into an electric rotatable opening type structure and is rotatably opened under the smoke exhaust working condition, the air duct resistance is reduced, and smoke is rapidly exhausted. Because the equipment is very easily opened the failure condition because of the equipment is itself bulky, if the operation maintenance is not timely enough, can lead to whole station system of discharging fume paralysed, has certain potential safety hazard.
(3) The air duct heat exchange flow is short, and the length characteristic of the air duct cannot be effectively utilized. The subway station is generally attached longer, and the wind channel has long and narrow characteristics, and the mounting means of heat transfer board is generally perpendicular with the air current heat transfer streamline, and the heat transfer flow is shorter, can not realize effectual turbulent heat transfer, can not combine the station form to increase the heat transfer flow simultaneously, influences partial heat transfer effect.
Disclosure of Invention
The utility model discloses to the technical problem who exists among the prior art, provide a subway station exhaust duct by-pass evaporative cooling formula ventilation air conditioning system that directly expands, the form is simple, maintain convenient, practice thrift the energy consumption, can carry out the mode switch according to regional annual climate change, satisfy the safe operation of each mode such as subway station ventilation, air conditioner, conflagration operating mode.
The utility model adopts the technical proposal that: the bypass type evaporative cooling direct-expansion ventilation air-conditioning system comprises an air valve A, a modular evaporative cooling direct-expansion heat exchange device, a heat exhaust fan, an air valve B, a direct-expansion air-conditioning unit, a refrigerant pipeline, an air exhaust channel and a piston air channel, wherein the air valve A, the modular evaporative cooling direct-expansion heat exchange device and the heat exhaust fan are fixed in the air exhaust channel, one side of the modular evaporative cooling direct-expansion heat exchange device is tightly attached to the air valve A, the other side of the modular evaporative cooling direct-expansion heat exchange device is tightly attached to the inner side wall of the air exhaust channel, the piston air channel is arranged beside the air exhaust channel, the air valve B is arranged at the communication position of the air exhaust channel and the piston air channel, the air valve B is located between the modular evaporative cooling direct-expansion heat exchange device and the heat exhaust fan, and the modular evaporative cooling direct-expansion heat exchange device is connected with the direct-expansion air-conditioning unit through the refrigerant pipeline.
Furthermore, the number of the modular evaporative cooling direct-expansion heat exchange devices is two, and the two modular evaporative cooling direct-expansion heat exchange devices are respectively positioned on two sides of the air valve A.
Furthermore, the air valve A is perpendicular to the inner side wall of the exhaust duct, and an included angle between the modular evaporative cooling direct-expansion heat exchange device and the inner side wall of the exhaust duct is 15-45 degrees.
Furthermore, the direct expansion type air conditioning unit is positioned in an air duct or a machine room.
Further, the direct expansion type air conditioning unit is a large system direct expansion type air conditioning unit and a small system cabinet type direct expansion type air conditioning unit.
Further, the piston air duct is a single piston air duct or a double-piston first piston air duct.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
1. the utility model discloses break away from subway civil engineering professional condition restriction, adopt modular evaporative cooling to directly expand heat transfer device, install in the exhaust duct together with the blast gate, structure restricted nature greatly reduced can not rely on the wind channel width to carry out the steam bypass, can carry out joint heat extraction in combination subway exhaust system suitable for local conditions, has reduced the setting of ground cooling tower, reduces the computer lab area, reduces the initial investment to the working costs is saved.
2. Under the working condition of smoke discharge, the modular evaporative cooling direct-expansion heat exchange device does not rotate or move, and a special smoke discharge air valve with higher guarantee rate is adopted, so that the system safety guarantee rate is improved; under ventilation and the operating mode of discharging fume at ordinary times, the blast gate is perpendicular with the wind channel streamline, and resistance greatly reduced has avoided traditional heat transfer board to install the too high phenomenon of resistance in the wind channel.
3. The utility model discloses generally affiliated longer according to subway station, the wind channel has long and narrow characteristics, and when modular evaporation cooling directly expanded heat transfer device installed, the contained angle that reduces as far as possible and air current heat transfer streamline combines station form increase heat transfer flow, reinforcing turbulent flow heat transfer, turbulent flow effect reinforcing corresponds the radiating effect and obtains the reinforcing.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: the system comprises 1-an air valve A, 2-a modular evaporative cooling direct-expansion heat exchange device, 3-a heat exhaust fan, 4-an air valve B, 5-a large-system direct-expansion air conditioning unit, 6-a small-system cabinet type direct-expansion unit, 7-a refrigerant pipeline, 8-an exhaust duct, 9-a piston air duct and 10-a piston air hole.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model provides a formula ventilation air conditioning system is directly expanded in subway station exhaust duct bypass evaporative cooling, as shown in figure 1, it includes that blast gate A1, modular evaporative cooling directly expand heat transfer device 2, exhaust fan 3, blast gate B4, the formula air conditioning unit that directly expands, refrigerant pipeline 7, exhaust duct 8 and piston wind channel 9. An air valve A1, a modular evaporative cooling direct-expansion heat exchange device 2 and a heat exhaust fan 3 are fixed in the exhaust duct 8, and the air valve A1 and the modular evaporative cooling direct-expansion heat exchange device 2 are located behind the heat exhaust fan 3. The air valve A1 is perpendicular to the inner side wall of the exhaust duct 8, the modular evaporative cooling direct-expansion heat exchange devices 2 are symmetrically arranged on two sides of the air valve A1 respectively, one side of each modular evaporative cooling direct-expansion heat exchange device 2 is tightly attached to the air valve A1, and the other side of each modular evaporative cooling direct-expansion heat exchange device 2 is tightly attached to the inner side wall of the exhaust duct 8. The included angle between the modular evaporative cooling direct-expansion heat exchange device 2 and the inner side wall of the exhaust duct 8 is 30 degrees. The upper end and the lower end of the air valve A1 and the modular evaporative cooling direct-expansion heat exchange device 2 are tightly attached to the upper inner wall and the lower inner wall of the exhaust duct 8. The heat exhausting fan 3 is used as a smoke exhausting fan in a rail running area and also used as the heat exhausting fan 3 under ordinary working conditions.
And a piston air duct 9 is arranged beside the exhaust duct 8, and a piston air hole 10 is connected with the piston air duct 9. And an air valve B4 is arranged at the communication position of the exhaust duct 8 and the piston air duct 9, and the air valve B4 is positioned between the modular evaporative cooling direct-expansion heat exchange device 2 and the exhaust air heater 3. In this embodiment, the piston air duct 9 is a single piston air duct. For the subway station adopting the double-piston air duct, the piston air duct 9 is a double-piston first piston air duct.
The exhaust duct 8 can be detached in combination with a station form, and if the exhaust duct 8 is a combined duct (below 2.8m, the exhaust duct is a heat exhaust duct, and a heat exhaust fan is arranged in the exhaust duct, and the upper layer is the exhaust duct). Then blast gate A1, modular evaporation cooling directly expand heat transfer device 2 and blast gate B4 and all install in the lower floor heat extraction air duct at 3 places of heat extraction fan, do not influence the utility model discloses an implement.
The modular evaporative cooling direct-expansion heat exchange device 2 is connected with a direct-expansion air conditioning unit through a refrigerant pipeline 7. The direct expansion type air conditioning unit can be installed in an air duct or a machine room, and the direct expansion type air conditioning unit is located in the machine room. The direct expansion type air conditioning unit comprises a compressor, an expansion valve and other refrigeration components. The direct expansion type air conditioning unit is divided into a large system direct expansion type air conditioning unit 5 and a small system cabinet type direct expansion type air conditioning unit 6.
The main operating conditions of the present embodiment are as follows:
1. under the normal heat extraction working condition of an air-conditioning season: and closing the air valve A1 and the air valve B4, and cooling the hot gas of the condensing machine by adopting the modular evaporative cooling direct-expansion heat exchange device 2. The exhaust fan 3 is opened in a frequency conversion mode, airflow is emitted from the exhaust fan 3 and then flows through the modular evaporative cooling direct-expansion heat exchange device 2 to exchange and dissipate heat, system heat is dissipated through the exhaust duct 8 and an exhaust well connected with the exhaust duct 8, and meanwhile airflow in the piston air duct 9 and airflow in the exhaust duct 8 are not crossed.
2. Under the condition of fire hazard in the rail-mounted area of an air conditioner season: the air valve A1 is opened, the air valve B4 is closed, and the exhaust duct 8 is used for exhausting smoke. The heat exhausting fan 3 is opened at a fixed frequency, smoke smoothly passes through the air valve A1, and the safety guarantee rate is greatly improved.
3. Under the high-temperature working condition of the transition season: and closing the air valve A1 and the air valve B4, and cooling the hot gas of the condensing engine by adopting the modular evaporative cooling direct-expansion heat exchange device 2. The air exhausting fan 3 is started at full frequency conversion, air flow is emitted from the air exhausting fan 3 and then flows through the modular evaporative cooling direct-expansion heat exchange device 2 to exchange and dissipate heat, system heat is dissipated through the air exhaust duct 8 and the air exhaust well, and meanwhile, air flow in the piston air duct 9 and air flow in the air exhaust duct 8 are not crossed.
4. Under the low-temperature working condition of the transition season: and the air valve A1 is closed, the air valve B4 is opened, and the modular evaporative cooling direct-expansion heat exchange device 2 is adopted to cool the hot gas of the condensing machine. The heat exhausting fan 3 is closed at low temperature, the airflow is ejected from the piston air duct 9 and then flows through the modular evaporation cooling direct expansion heat exchange device 2 to exchange and dissipate heat, the system heat is dissipated through the air exhaust duct 8 and the air exhaust well, and meanwhile, the airflow in the piston air duct 9 is crossed with the airflow in the air exhaust duct 8.
When a train enters a station, the air valve A1 is closed, the air valve B4 is opened, and the modular evaporative cooling direct-expansion heat exchange device 2 is adopted to cool the hot gas of the condensing machine; when the train leaves the station, the air valve A1 is closed, the air valve B4 is closed, normal suction of piston air is realized, and exhausted hot air is prevented from being sucked repeatedly.
5. Under the fire hazard working condition of the transition season rail-mounted area: the air valve A1 is opened, the air valve B4 is closed, and the exhaust duct 8 is used for exhausting smoke. The heat exhausting fan 3 is opened at a fixed frequency, smoke smoothly passes through the air valve A1, and the safety guarantee rate is greatly improved.
6. Under the fire working condition of the tunnel, the air valve A1 is closed, the air valve B4 is closed, and the piston fan is used for discharging smoke.
The utility model discloses directly expand heat transfer device 2 with tunnel ventilation system's blast gate A1 and the modular evaporative cooling of directly expanding air conditioning system and combine, install in same exhaust airway 8 with heat extraction fan 3, avoided directly expanding the drawback that air conditioning system breaks away from the functional component exclusive application at station.
The present invention has been described in detail with reference to the embodiments, but the description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. The scope of protection of the present invention is defined by the claims. Technical scheme, or technical staff in the field is in the utility model technical scheme's inspiration under the utility model discloses a substantial and protection scope, design similar technical scheme and reach above-mentioned technological effect, perhaps to the impartial change that application scope was made and improve etc. all should still belong to the utility model discloses a patent covers within the protection scope.
Claims (6)
1. The utility model provides a formula of directly expanding ventilation air conditioning system of subway station exhaust duct bypass evaporative cooling which characterized in that: the modular evaporative cooling direct-expansion heat exchange device comprises an air valve A, a modular evaporative cooling direct-expansion heat exchange device, a heat exhaust fan, an air valve B, a direct-expansion air conditioning unit, a refrigerant pipeline, an exhaust duct and a piston air duct, wherein the air valve A, the modular evaporative cooling direct-expansion heat exchange device and the heat exhaust fan are fixed in the exhaust duct, one side of the modular evaporative cooling direct-expansion heat exchange device is tightly attached to the air valve A, the other side of the modular evaporative cooling direct-expansion heat exchange device is tightly attached to the inner side wall of the exhaust duct, the piston air duct is arranged beside the exhaust duct, the air valve B is arranged at the communication position of the exhaust duct and the piston air duct and is positioned between the modular evaporative cooling direct-expansion heat exchange device and the heat exhaust fan, and the modular evaporative cooling direct-expansion heat exchange device is connected with the direct-expansion air conditioning unit through the refrigerant pipeline.
2. The subway station exhaust duct bypass type evaporative cooling direct-expansion type ventilation air-conditioning system as claimed in claim 1, wherein: the number of the modular evaporative cooling direct-expansion heat exchange devices is two, and the two modular evaporative cooling direct-expansion heat exchange devices are respectively positioned on two sides of the air valve A.
3. The subway station exhaust duct bypass type evaporative cooling direct-expansion ventilation air-conditioning system as claimed in claim 1 or 2, wherein: the air valve A is perpendicular to the inner side wall of the exhaust duct, and the included angle between the modular evaporative cooling direct-expansion heat exchange device and the inner side wall of the exhaust duct is 15-45 degrees.
4. The subway station exhaust duct bypass type evaporative cooling direct-expansion ventilation air-conditioning system as claimed in claim 1, wherein: the direct expansion type air conditioning unit is positioned in an air duct or a machine room.
5. The subway station exhaust duct bypass type evaporative cooling direct-expansion type ventilation air-conditioning system as claimed in claim 1, wherein: the direct expansion type air conditioning unit comprises a large system direct expansion type air conditioning unit and a small system cabinet type direct expansion type air conditioning unit.
6. The subway station exhaust duct bypass type evaporative cooling direct-expansion ventilation air-conditioning system as claimed in claim 1, wherein: the piston air duct is a single piston air duct or a double-piston first piston air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222109470.4U CN218269377U (en) | 2022-08-11 | 2022-08-11 | Bypass type evaporative cooling direct-expansion type ventilation air-conditioning system for exhaust duct of subway station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222109470.4U CN218269377U (en) | 2022-08-11 | 2022-08-11 | Bypass type evaporative cooling direct-expansion type ventilation air-conditioning system for exhaust duct of subway station |
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| Publication Number | Publication Date |
|---|---|
| CN218269377U true CN218269377U (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222109470.4U Active CN218269377U (en) | 2022-08-11 | 2022-08-11 | Bypass type evaporative cooling direct-expansion type ventilation air-conditioning system for exhaust duct of subway station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218269377U (en) |
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2022
- 2022-08-11 CN CN202222109470.4U patent/CN218269377U/en active Active
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