CN215309893U - Pressure intelligent control's thin water smoke fire extinguishing systems - Google Patents
Pressure intelligent control's thin water smoke fire extinguishing systems Download PDFInfo
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- CN215309893U CN215309893U CN202121048143.1U CN202121048143U CN215309893U CN 215309893 U CN215309893 U CN 215309893U CN 202121048143 U CN202121048143 U CN 202121048143U CN 215309893 U CN215309893 U CN 215309893U
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Abstract
The utility model discloses a pressure intelligent control water mist fire extinguishing system, which comprises a control unit, a high-pressure water mist fire extinguishing module, a subarea control module, a trigger module and a fire-fighting alarm host, wherein the high-pressure water mist fire extinguishing module, the subarea control module, the trigger module and the fire-fighting alarm host are electrically connected with the control unit; this pressure intelligent control's thin water smoke fire extinguishing systems is through setting up a plurality of subregion valve unit, and the fire control water pressure in each fire protection district of independent control respectively can effectively avoid this system's water pressure can not cause the extravagant time, satisfies the water pressure requirement in individual fire protection district for the fire control water pressure distribution of this system is more reasonable.
Description
Technical Field
The utility model relates to the field of fire fighting, in particular to a pressure intelligent control water mist fire extinguishing system.
Background
The water mist fire extinguishing system is one of the most environment-friendly and efficient fire extinguishing equipment at present, and for different fire protection areas, the water flow pressure requirements of fire-fighting spraying water mist are different, and the water spray pressure of each fire protection area cannot be independently controlled by the existing water mist fire extinguishing system, so that the waste of the water flow pressure in the fire extinguishing system is caused, and the water requirements of various fire protection areas cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects of the prior art and provides a pressure intelligent control water mist fire extinguishing system.
In order to achieve the above purpose, the following scheme is provided: a pressure intelligent control water mist fire extinguishing system comprises a control unit, a high-pressure water mist fire extinguishing module, a partition control module, a trigger module and a fire alarm host, wherein the high-pressure water mist fire extinguishing module is electrically connected with the control unit through a pipeline, the partition control module is electrically connected with the fire alarm host, the fire alarm host is electrically connected with the trigger module, the partition control module comprises a plurality of fire protection areas and a plurality of partition control valve groups, the partition control valve groups are arranged in the fire protection areas, each partition control valve group comprises a water spray pipe, an electric ball valve, a manual ball valve, a pressure switch and a pressure gauge, the electric ball valve, the manual ball valve, the pressure switch and the pressure gauge are arranged in a protection box body, one end of the water spray pipe is connected with the high-pressure water mist fire extinguishing module through a pipeline, and a pressure control valve is arranged on a connecting pipeline of the water spray pipe and the high-pressure water mist fire extinguishing module, the other end of spray pipe is equipped with thin water smoke shower nozzle, and thin water smoke shower nozzle is installed in the fire control protection zone, electric ball valve, manual ball valve, pressure switch and manometer are all installed on the spray pipe, manual ball valve is located electric ball valve's inlet end department, electric ball valve is connected with the control host computer electricity, pressure switch is connected with fire control alarm host computer electricity.
Further, the high-pressure water mist fire extinguishing module comprises a frame, and a plurality of pressurizing modules, a water storage tank, a water outlet valve, a water supply pipe and a water outlet pipe which are arranged at the frame, the bottom of the water storage tank is connected with one end of a water supply pipe, the other end of the water supply pipe is connected with the water inlet end of the pressurizing module, a liquid level meter is arranged in the water storage tank, the water outlet end of the pressurizing module is connected with one end of the water outlet pipe, the other end of the water outlet pipe is provided with a water outlet valve, the water outlet end of the water outlet valve is connected with the water inlet end of the pressure control valve, the water outlet end of the pressure control valve is connected with the water spray pipe, the water outlet pipe is provided with a pressure sensor, the pressurizing module comprises a motor, a coupler, a high-pressure pump and a one-way valve, the motor is connected with the high-pressure pump through the coupler, the outer sides of two periods of the motor and the high-pressure pump are provided with the protective covers, the water inlet end of the high-pressure pump is connected with the water supply pipe through a pipeline, the water outlet end of the high-pressure pump is connected with the water outlet pipe through a pipeline, and a one-way valve is arranged between the high-pressure pump and the water outlet pipe.
Further, storage water tank department is equipped with the module of intaking, and the module of intaking includes moisturizing solenoid valve, manual moisturizing ball valve, filter, steady voltage pump, the one end of moisturizing solenoid valve passes through the pipe connection with the storage water tank and the other end of moisturizing solenoid valve passes through the pipe connection with external water source, and the end of intaking of filter passes through the pipe connection with the storage water tank and the water outlet end of filter is connected with the end of intaking of delivery pipe, the one end of manual moisturizing ball valve passes through the pipe connection with external water source, and the other end and the storage water tank connection of manual moisturizing ball valve, the water outlet end and the storage water tank of steady voltage pump pass through the pipe connection and the end of intaking of steady voltage pump passes through the pipe connection with external water source.
Further, a drain valve is arranged at the bottom of the water storage tank, and a safety valve is arranged at the water outlet pipe.
Furthermore, the control unit comprises a control host, the control host is electrically connected with the high-pressure water mist fire extinguishing module, the partition control valve group, the fire-fighting alarm host and the pressure liquid level monitoring module, and a manual-automatic change-over switch and an emergency start-stop button are arranged on the control host.
Further, the triggering module comprises a smoke detector and a temperature detector, and the smoke detector and the temperature detector are both electrically connected with the fire alarm host.
The working principle and the advantages of the utility model are as follows: this pressure intelligent control's thin water smoke fire extinguishing systems is through setting up a plurality of subregion valve unit, and the fire control water pressure in each fire protection district of independent control respectively can effectively avoid this system's water pressure can not cause the extravagant time, satisfies the water pressure requirement in individual fire protection district for the fire control water pressure distribution of this system is more reasonable.
Drawings
FIG. 1 is a schematic diagram of the composition of the present invention;
FIG. 2 is a front view of the high pressure water mist module of the present invention;
fig. 3 is a left side view of the high pressure water mist module of the present invention.
Reference numerals in the drawings of the specification include:
01. the fire-fighting water mist fire-fighting water pump comprises a control unit, 02, a high-pressure water mist fire-fighting module, 03, a partition control module, 04, a fire-fighting alarm host, 05, a trigger module, 1, a motor, 2, a water storage tank, 3, a water replenishing electromagnetic valve, 4, a water outlet valve, 5, a manual water replenishing ball valve, 6, a blow-down valve, 7, a rack, 8, a water supply pipe, 9, a water outlet pipe, 10, a coupler, 11, a high-pressure pump, 12, a one-way valve, 13, a liquid level meter, 14, a shield, 15, a filter, 16, a safety valve and 17, and a pressure stabilizing pump is arranged in a water tank.
Detailed Description
The following is further detailed by the specific embodiments:
as shown in fig. 1 to 3, a pressure intelligent control water mist fire extinguishing system comprises a control unit 01, a high-pressure water mist fire extinguishing module 02 electrically connected with the control unit 01, a partition control module 03, a trigger module 05 and a fire alarm host 04, wherein the high-pressure water mist fire extinguishing module 02 is connected with the partition control module 03 through a pipeline, the partition control module 03 is electrically connected with the fire alarm host 04, the fire alarm host 04 is electrically connected with the trigger module 05, the partition control module 03 comprises a plurality of fire protection areas and a plurality of partition control valve groups, the partition control valve groups are arranged in the fire protection areas, each partition control valve group comprises a water spray pipe, an electric ball valve, a manual ball valve, a pressure switch and a pressure gauge, the electric ball valve, the manual ball valve, the pressure switch and the pressure gauge are arranged in a protection box body, one end of the water spray pipe is connected with the high-pressure water mist fire extinguishing module 02 through a pipeline, and a pressure control valve is arranged on the connecting pipeline of the water spray pipe and the high-pressure water mist fire extinguishing module 02, the other end of spray pipe is equipped with thin water smoke shower nozzle, and thin water smoke shower nozzle is installed in the fire control protection zone, electric ball valve, manual ball valve, pressure switch and manometer are all installed on the spray pipe, manual ball valve is located electric ball valve's the inlet end department, electric ball valve is connected with the main control system electricity, pressure switch is connected with fire control alarm system 04 electricity.
The fire alarm system comprises a control unit 01, a high-pressure water mist fire extinguishing module 02, a trigger module 05, a fire alarm host 04, namely a fire alarm controller, a fire automatic alarm system, a detector, a fire alarm signal sending device, an automatic fire extinguishing device, a fire linkage control device, an automatic monitoring system, a control unit, a trigger module and a fire alarm module, wherein the control unit 01 is used for controlling electric elements of the system, the high-pressure water mist fire extinguishing module 02 is used for generating relatively clean high-pressure water, the trigger module 05 is used for detecting fire, the fire alarm host 04 is a fire alarm controller, and the fire alarm host 04 is the heart of the fire automatic alarm system, can realize centralized control, can supply power to the detector, and has the functions of receiving a fire signal, starting the fire alarm device, starting the fire alarm signal through the fire alarm sending device or starting the automatic fire extinguishing device and the fire control linkage control device through the automatic fire extinguishing control device, correctly operating the automatic monitoring system, giving out sound and light alarm for specific faults; subregion control module 03 is through the fire-fighting water pressure in each fire control subregion of each subregion control valves control, electric ball valve is used for controlling the rivers break-make of spray pipe, manual ball valve operating condition keeps normally opening down, it is closed when being used for overhaul of the equipments, thin water smoke shower nozzle is used for spraying water smoke, pressure switch is feedback device, it is at thin water smoke shower nozzle during operation, the spray pipe produces water pressure, trigger pressure switch, pressure switch sends feedback signal to fire alarm host 04 promptly, the manometer is used for detecting the water pressure of spray pipe.
As shown in fig. 2 and fig. 3, the high pressure water mist fire extinguishing module 02 comprises a frame 7, and a plurality of pressurizing modules, a water storage tank 2, a water outlet valve 4, a water supply pipe 8 and a water outlet pipe 9 which are arranged at the frame 7, the bottom of the water storage tank 2 is connected with one end of a water supply pipe 8, the other end of the water supply pipe 8 is connected with the water inlet end of the pressurizing module, a liquid level meter 13 is arranged in the water storage tank 2, the water outlet end of the pressurizing module is connected with one end of a water outlet pipe 9, the other end of the water outlet pipe 9 is provided with a water outlet valve 4, the water outlet pipe 9 is provided with a pressure sensor 13, the pressurizing module comprises a motor 1, a coupler 10, a high-pressure pump 11 and a one-way valve 12, the motor 1 is connected with the high-pressure pump 11 through the coupler 10, a protective cover 14 is arranged on the outer side of the coupler 10, the water inlet end of the high-pressure pump 11 is connected with the water supply pipe 8 through a pipeline, the water outlet end of the high-pressure pump 11 is connected with the water outlet pipe 9 through a pipeline, and a check valve 12 is arranged between the high-pressure pump and the water outlet pipe 9.
Wherein, the pressure boost module is used for increasing water pressure, and the monitoring quality of intaking storage water tank 2 is used for pre-loading water, delivery pipe 8 is used for intercommunication feed water tank and pressure boost module, water quality detector installs the quality of water in the monitoring storage water tank 2 in storage water tank 2, outlet pipe 9 is used for discharging the rivers behind the pressure boost module pressure boost, outlet valve 4 is used for controlling the rivers break-make of outlet pipe 9, motor 1 is used for providing the drive power of high-pressure pump 11, the output shaft of motor 1 and the power input of high-pressure water pump are connected to shaft coupling 10, water outlet pipe 9 is arranged after the high-pressure water pump can pressurize the rivers in the inlet tube, the water backward flow in outlet pipe 9 can be avoided to check valve 12 between outlet pipe 9 and the high-pressure pump 11.
As shown in fig. 2 and 3, a water inlet module is arranged at the position of the water storage tank 2 and comprises a water replenishing electromagnetic valve 3, a manual water replenishing ball valve 5, a filter and a pressure stabilizing pump 17, one end of the water replenishing electromagnetic valve 3 is connected with the water storage tank 2 through a pipeline, the other end of the water replenishing electromagnetic valve 3 is connected with an external water source through a pipeline, the water inlet end of the filter is connected with the water storage tank 2 through a pipeline, the water outlet end of the filter is connected with the water inlet end of a water supply pipe 8, one end of the manual water replenishing ball valve 5 is connected with the external water source through a pipeline, the other end of the manual water replenishing ball valve 5 is connected with the water storage tank 2, the water outlet end of the pressure stabilizing pump is connected with the water storage tank 2 through a pipeline, and the water inlet end of the pressure stabilizing pump is connected with the external water source through a pipeline.
The water replenishing electromagnetic valve 3 and the manual water replenishing ball valve 5 are used for controlling the on-off of a pipeline through which an external water source enters a water tank, the manual water replenishing ball valve 5 is used for manually opening the pipeline through which the external water source enters the water storage tank 2 when the water replenishing electromagnetic valve 3 breaks down, the filter is used for filtering water in the water storage tank 2 and then sending the water into the water spray pipe, the pressure stabilizing pump 17 keeps the pressure of low-pressure water in the pipeline stable when the high-pressure pump 11 is not started, and the pressure stabilizing pump 17 stops working after the high-pressure pump 11 is started.
As shown in fig. 2 and 3, a blowdown valve 6 is arranged at the bottom of the water storage tank 2, and a safety valve 16 is arranged at the water outlet pipe 9.
The safety valve 16 is arranged on the water outlet pipe 9, and when the water pressure exceeds the set pressure, the safety valve 16 is automatically opened to release the pressure, so that the safety valve mainly plays a role of protecting equipment and prevents the equipment from being damaged due to the ultrahigh water pressure; the blowoff valve 6 is used for discharging sewage after cleaning the water storage tank 2.
As shown in fig. 1, the control unit 01 includes a control host, the control host is electrically connected with the high-pressure water mist fire extinguishing module, the partition control valve group and the fire alarm host 04, and the control host is provided with a manual-automatic change-over switch and an emergency start-stop button.
The control host comprises a PLC programmable controller and other auxiliary control circuits, is the existing mature technology and is not repeated herein, the control host is used for controlling the operation of other electrical equipment in the system, the manual-automatic change-over switch is used for switching the operation mode of the system, and the emergency start-stop switch can be used for rapidly starting or stopping the operation of the system.
As shown in fig. 1, the triggering module 05 includes a smoke detector and a temperature detector, both of which are electrically connected to the fire alarm host 04.
Wherein, smoke detector and temperature detector are present mature technology, and no longer give unnecessary details here, smoke detector is used for surveying the smog information in its place, and temperature detector is used for detecting the temperature information in its place, all is equipped with trigger module 05 in each fire control protection zone.
The specific implementation process is as follows:
the pressure intelligent control water mist fire extinguishing system comprises a fire water tank and a water storage tank 2, wherein water is pre-stored in the fire water tank and the water storage tank, a liquid level sensor is used for monitoring the water quantity in the fire water tank in real time, a liquid level meter 13 is used for monitoring the water quantity in the water storage tank 2 in real time, when the system is started, a smoke detector and a temperature detector are used for detecting each fire control protection area in real time, real-time detection data are sent to a control unit 01 for processing, when smoke and/or temperature in the protection area exceed a threshold value preset by the control unit 01, a control host sends a starting signal to a high-pressure water mist fire extinguishing module 02 and an automatic water replenishing valve, the automatic water replenishing valve is opened, an external water source enters the fire water tank, a motor 1, a water replenishing electromagnetic valve 3 and a water outlet valve 4 of the high-pressure water mist fire extinguishing module 02 are all started, and a manual water replenishing ball valve 5 can be manually started for supplying water when the water replenishing electromagnetic valve 3 breaks down, water in a fire water tank enters a water storage tank 2 through a water supplementing electromagnetic valve 3 or a manual water supplementing ball valve 5, a motor 1 drives a high-pressure pump 11 to start through a coupler 10, the high-pressure pump 11 boosts the water in the water storage tank 2 through a water supply pipe 8 and pumps the water into a water outlet pipe 9, high-pressure water flow in the water outlet pipe 9 enters each zone control valve group through a water outlet valve 4, an electric ball valve in the water outlet pipe 9 is started synchronously, the high-pressure water flow in the water outlet pipe 9 can enter a water spray pipe through a filter, the water flow enters a fine water mist spray head through the manual ball valve and the electric ball valve in the water spray pipe in sequence, and the fine water mist spray head can spray high-pressure fine water mist; in the process, the pressure switch at the spray pipe is triggered, the pressure switch transmits the feedback signal back to the fire-fighting alarm host 04 and the control host, so that the fire-fighting alarm host 04 is started, the control host is connected to determine whether high-pressure water is conveyed to a protection area, and the fire-fighting control host can send out sound and light alarms and other measures.
The pressure control valve connected with each zone control valve group can independently set the water outlet pressure value of the pressure control valve, so that the water pressure of the fire-fighting water in each fire-fighting protection zone can be independently controlled, and the fire-fighting water requirements of different fire-fighting protection zones are further met.
The smoke detector and the temperature detector transmit fire signals to the fire alarm host 04 and the control host, and the fire alarm host 04 and the control host send fire information to a fire department server through a network to inform the fire department in time, so that corresponding measures are effectively taken.
Through setting up hand automatic switch, can further improve fire extinguishing systems's reliability, specifically do, if the staff has the conflagration to appear in the discovery of protection zone, but smog and temperature in the protection zone do not all reach predetermined threshold value, staff's accessible hand automatic switch switches fire extinguishing systems to manual mode to make this system stand the horse and report to the police the operation and put out a fire the operation, and then effectively prevent the further expansion of conflagration, improved fire extinguishing systems ' reliability.
The system is started in a delayed mode, and the emergency starting and stopping button is arranged, so that the functions of emergency starting and emergency stopping of the fire extinguishing system can be realized, the time of delay is shortened, and the efficiency of the fire extinguishing system is improved.
This pressure intelligent control's thin water smoke fire extinguishing systems can filter the water source that gets into this system, detect water source quality and increase and transmit to each subregion control valves department after water pressure through first filter and filter 15, and each subregion control valves is carried the water under high pressure to thin water smoke shower nozzle department again for thin water smoke shower nozzle can spray water smoke steadily, and reinforcing fire control effect monitors the water source that gets into this system simultaneously effectively, avoids water to block up.
The pressure stabilizing pump 17 keeps the pressure of the low-pressure water in the pipeline stable when the high-pressure pump 11 is not started, and the pressure stabilizing pump 17 stops working after the high-pressure pump 11 is started.
This pressure intelligent control's thin water smoke fire extinguishing systems is through setting up a plurality of subregion valve unit, and the fire control water pressure in each fire protection district of independent control respectively can effectively avoid this system's water pressure can not cause the extravagant time, satisfies the water pressure requirement in individual fire protection district for the fire control water pressure distribution of this system is more reasonable.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics of the embodiments is not described herein in any greater extent than that known to persons of ordinary skill in the art at the filing date or before the priority date of the present application, so that all of the prior art in this field can be known and can be applied with the ability of conventional experimental means before this date. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the applicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. The utility model provides a pressure intelligent control's thin water smoke fire extinguishing systems which characterized in that: comprises a control unit, a high-pressure water mist fire extinguishing module, a subarea control module, a trigger module and a fire-fighting alarm host which are electrically connected with the control unit, wherein the high-pressure water mist fire extinguishing module is connected with the subarea control module through a pipeline, the subarea control module is electrically connected with the fire-fighting alarm host, the fire-fighting alarm host is electrically connected with the trigger module, the subarea control module comprises a plurality of fire-fighting protection areas and a plurality of subarea control valve groups, the subarea control valve groups are arranged in the fire-fighting protection areas, each subarea control valve group comprises a water spray pipe, an electric ball valve, a manual ball valve, a pressure switch and a pressure gauge, the electric ball valve, the manual ball valve, the pressure switch and the pressure gauge are arranged in the protection box, one end of the water spray pipe is connected with the high-pressure water mist fire extinguishing module through a pipeline, a pressure control valve is arranged on the connecting pipeline of the water spray pipe and the high-pressure water mist fire extinguishing module, and a water mist spray nozzle is arranged at the other end of the water spray pipe, the water mist spray head is installed in a fire protection area, the electric ball valve, the manual ball valve, the pressure switch and the pressure gauge are all installed on the water spray pipe, the manual ball valve is located at the water inlet end of the electric ball valve, the electric ball valve is electrically connected with the control host, and the pressure switch is electrically connected with the fire alarm host.
2. The pressure intelligent controlled water mist fire suppression system of claim 1, wherein: the high-pressure water mist fire extinguishing module comprises a frame, and a plurality of pressurizing modules, a water storage tank, a water outlet valve, a water supply pipe and a water outlet pipe which are arranged at the frame, the bottom of the water storage tank is connected with one end of a water supply pipe, the other end of the water supply pipe is connected with the water inlet end of the pressurizing module, a liquid level meter is arranged in the water storage tank, the water outlet end of the pressurizing module is connected with one end of the water outlet pipe, the other end of the water outlet pipe is provided with a water outlet valve, the water outlet end of the water outlet valve is connected with the water inlet end of the pressure control valve, the water outlet end of the pressure control valve is connected with the water spray pipe, the water outlet pipe is provided with a pressure sensor, the pressurizing module comprises a motor, a coupler, a high-pressure pump and a one-way valve, the motor is connected with the high-pressure pump through the coupler, the outer sides of two periods of the motor and the high-pressure pump are provided with the protective covers, the water inlet end of the high-pressure pump is connected with the water supply pipe through a pipeline, the water outlet end of the high-pressure pump is connected with the water outlet pipe through a pipeline, and a one-way valve is arranged between the high-pressure pump and the water outlet pipe.
3. A pressure intelligent controlled water mist fire suppression system according to claim 2, wherein: the utility model discloses a water storage tank, including storage water tank department, manual moisturizing ball valve, filter, surge damping pump, the one end of moisturizing solenoid valve and storage water tank pass through the pipe connection and the other end of moisturizing solenoid valve passes through the pipe connection with external water source with the storage water tank, the end of intaking of filter passes through the pipe connection with the storage water tank and the play water end of filter is connected with the end of intaking of delivery pipe, the one end and the external water source of manual moisturizing ball valve pass through the pipe connection, the other end and the storage water tank connection of manual moisturizing ball valve, the play water end and the storage water tank of surge damping pump pass through the pipe connection and the end of intaking of surge damping pump passes through the pipe connection with external water source.
4. A pressure intelligent controlled water mist fire suppression system according to claim 2, wherein: the bottom of the water storage tank is provided with a drain valve, and the water outlet pipe is provided with a safety valve.
5. The pressure intelligent controlled water mist fire suppression system of claim 1, wherein: the control unit comprises a control host, the control host is electrically connected with the high-pressure water mist fire extinguishing module, the partition control valve group, the fire-fighting alarm host and the pressure liquid level monitoring module, and a manual-automatic change-over switch and an emergency start-stop button are arranged on the control host.
6. The pressure intelligent controlled water mist fire suppression system of claim 1, wherein: the triggering module comprises a smoke detector and a temperature detector, and the smoke detector and the temperature detector are both electrically connected with the fire-fighting alarm host.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121048143.1U CN215309893U (en) | 2021-05-17 | 2021-05-17 | Pressure intelligent control's thin water smoke fire extinguishing systems |
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| CN202121048143.1U CN215309893U (en) | 2021-05-17 | 2021-05-17 | Pressure intelligent control's thin water smoke fire extinguishing systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115624705A (en) * | 2022-01-27 | 2023-01-20 | 朝阳市加华电子有限公司 | 60L high-pressure water mist discharge system complete equipment |
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2021
- 2021-05-17 CN CN202121048143.1U patent/CN215309893U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115624705A (en) * | 2022-01-27 | 2023-01-20 | 朝阳市加华电子有限公司 | 60L high-pressure water mist discharge system complete equipment |
| CN115624705B (en) * | 2022-01-27 | 2023-10-27 | 朝阳市加华电子有限公司 | Complete equipment of 60L high-pressure fine water mist discharge system |
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