JP4773193B2 - Fire extinguisher - Google Patents

Description

The present invention relates to a fire extinguisher that extinguishes a fire by disposing a container filled with a fire extinguishing chemical solution upward such as a range hood and releasing the fire extinguishing chemical solution downward.

  Conventionally, as a range hood fire extinguisher for a house, a pressure accumulation type and a pressure type are mainly used. An accumulator type range hood fire extinguisher is prefilled with an inert gas such as nitrogen together with a fire extinguishing agent in a container, pressurized to a certain pressure, and fire extinguishing agent is pressurized and released from the nozzle by the operation of the fire detection unit. . In addition, a pressurized range hood fire extinguisher is filled with inert gas such as nitrogen gas in a small pressure vessel (cylinder), and the sealing plate of the pressure vessel is broken by the operation of the fire detection unit, and there is no additional pressure in another vessel. Pressurize and release the fire-extinguishing agent filled with pressure.

  Since all of these range hood fire extinguishing devices release the fire extinguishing agent by pressure, when activated, the fire extinguishing agent is released in a sprayed state in a wide range including the tempura pan from the nozzle.

On the other hand, both ends of the container containing the fire extinguisher are hung from the bottom of the range hood with wires, and the container itself is melted by the heat or flame from the tempura fire, and the fire extinguishing agent in the container flows down to the tempura pan to extinguish the fire. Like to do.
JP-A-5-337212 Japanese Patent Laid-Open No. 10-127803 JP 2002-306624 A Japanese Patent No. 3127411

However, such a conventional range hood fire extinguishing apparatus has the following problems. First, in a range hood fire extinguishing device that discharges fire extinguishing chemicals by conventional pressure,
First, fire-extinguishing agents are widely released, polluting the kitchen, and making it difficult to clean up.
Second, because hot oil splatters, it can be dangerous if someone is nearby,
Thirdly, since the filled fire extinguishing agent is released to other than the pot, it is necessary to keep the amount necessary to extinguish the tempura fire multiplied by the safety factor.
Fourth, the container becomes larger due to the increased amount of fire extinguishing agent,
Fifth, since internal pressure is applied, it is necessary to use a container having a predetermined pressure resistance performance.
There were problems such as.

  In addition, the range hood fire extinguishing device that dissolves the container itself and releases the extinguishing agent inside the container is the structure where the container dissolves because the container hung by the string melts down due to the heat of the flame. There is no upper limit, and there is no guarantee that fire extinguishing agents will be injected into the tempura pan. In addition, when a container melts with heat, a large amount of fire-extinguishing agent flows down to the tempura pan at a time, so that high-temperature oil splatters to the surrounding area, causing a safety problem for nearby people. Furthermore, when a fire extinguishing agent is put into tempura oil burning at a high temperature, the flame becomes large and there is a possibility of causing a deflagration state.

  Furthermore, in this type of range hood fire extinguishing device, it is necessary to detect the operation of the device and display an alarm display or a relocation message. The flame caused by tempura fire is less than the method of detecting the fire temperature due to tempura fire. Accordingly, an operation detection mechanism that detects that the range hood device actually performs the fire extinguishing operation is desired.

The present invention, provided with reliably extinguish a small amount of fire extinguishing agent liquid without splashing the oil around to tempura fire, it can be output extinguishing apparatus operation detecting signal by detecting the extinguishing operation by the extinguishing agent solution The purpose is to do.

In order to achieve this object, the present invention is configured as follows.
(All times atmospheric pressure / operating time of the air natural flow-down method)
The fire extinguishing apparatus of the present invention is
A container body that is mounted above a fire extinguishing object and that stores a fire extinguishing liquid in an atmospheric pressure state in which an air layer is formed on the upper part,
A thermal nozzle that is mounted on the container body and opens when it is heated to a predetermined temperature, allowing the fire extinguishing liquid to flow naturally while flowing in air;
An alarm switch mechanism provided in the container body and outputting an operation detection signal to the outside in accordance with the operation of the thermal nozzle;
It is provided with.

Here, the alarm switch mechanism is
A float member that moves up and down according to the liquid level arranged in the storage part of the fire extinguishing liquid in the container body;
A shaft member fixed to one end of the float member;
A diaphragm member that is disposed on the end side of the container main body and partitions the storage part for the extinguishing chemical, and supports the float member so as to be swingable through the shaft member;
A switch in which a switch operation part is disposed in contact with a shaft member protruding through a diaphragm member;
The provided, switches the switch to the non-actuated position by the floating of the float member by accommodating the extinguishing agent solution by pressing down the shaft member, said shaft by the lowering of the float member due to reduction of the liquid surface of the fire extinguishing liquid chemical by opening operation of the heat nozzle pushing up member to output a switching example operation motion detection signal the switch to the operating position.

(Normal negative pressure method)
In another form of the fire extinguishing apparatus of the present invention,
A container body mounted above a fire extinguishing object and containing a fire extinguishing chemical,
A negative pressure generating mechanism that is provided in the container body and makes the stowed state of the extinguishing chemical liquid a negative pressure state;
A thermal nozzle that is attached to the container body and opens when it is heated to a predetermined temperature, allowing the fire extinguisher liquid to flow down naturally,
An alarm switch mechanism that is provided in the container body and outputs an operation detection signal to the outside in accordance with the opening operation of the thermal nozzle;
It is provided with.

Here, the negative pressure generation mechanism is
A piston member slidably mounted with the end of the container body as a cylinder part;
A biasing member for maintaining urges the state Depi piston member housing the extinguishing liquid chemical in a direction to expand the storage volume of the storage state of the fire extinguishing agent fluid under negative pressure,
An intake port provided in the container body that opens by the movement of the piston member by the urging member when the negative pressure state associated with the opening operation of the thermal nozzle is released to atmospheric pressure, and introduces air into the container;
Is provided.

  The alarm switch mechanism corresponding to this negative pressure mechanism is switched to the non-operating position in the negative pressure holding state of the piston member at the outer position relative to the axial direction of the piston member, and the piston member moves due to the opening operation of the thermal nozzle. A switch that switches to the operating position and outputs an operation detection signal is provided.

(Always fine pressurization method)
In another form of the fire extinguishing apparatus according to the present invention,
A container body mounted above a fire extinguishing object and containing a fire extinguishing chemical,
A thermal nozzle that is mounted on the container body and opens when the container is heated to a predetermined temperature to flow down the fire extinguishing chemical,
An air introduction mechanism that naturally flows down the extinguishing liquid by flowing air into the container body with the opening operation of the thermal nozzle,
An alarm switch mechanism that is provided in the container body and outputs an operation detection signal to the outside in accordance with the opening operation of the thermal nozzle;
It is provided with.

Here, the alarm switch mechanism is
A diaphragm member arranged on the end side of the container body and partitioning the storage part of the extinguishing agent liquid;
A shaft member supported on the outside of the diaphragm member;
A spring for biasing the diaphragm member to the initial position via the shaft member in an atmospheric pressure state of the container body;
A switch with contact arrangement the switching operation portion to the distal end portion of the sheet Yafuto member which supports the diaphragm member,
The switch is switched to the non-operating position by moving the shaft member due to the deformation of the diaphragm member due to the pressurizing and holding state of the extinguishing liquid stored in the container body, and the diaphragm member is moved to the initial position when the thermal nozzle is opened. An operation detection signal is output by switching the switch to the operating position.

In this alarm switch mechanism, the diaphragm member is housed in a compartment partitioned by a partition wall having a connection opening at the lower portion to communicate the fire extinguishing chemical solution and the diaphragm member, and an air layer above the fire extinguishing chemical solution storage portion. Suppress communication with the diaphragm member.

The air introduction mechanism
A diaphragm member that is disposed on the end side of the container body and partitions the storage part for the extinguishing chemical solution, and has a valve hole opened,
A pilot valve member having a valve portion for opening and closing the valve hole Da Iyafuramu member,
A first spring that biases and supports the pilot valve member at an initial position on the diaphragm member side determined by the stopper in an atmospheric pressure state in the container body;
A second spring that biases and supports the valve hole of the diaphragm member at an initial position opened away from the pilot valve member in an atmospheric pressure state in the container body;
The first spring and the second spring are compressed in a state where the diaphragm member is pressed and deformed to the outside by the extinguishing chemical filled in the container body and the valve hole is fitted to the valve portion of the pilot valve member and closed. The pressure state is maintained, and the valve hole of the diaphragm member and the pilot valve member are moved by the first spring and the second spring according to the change from the pressure state in the container body to the atmospheric pressure state by the opening operation of the thermal nozzle. Returning to the initial position, the fire extinguishing liquid is allowed to flow naturally from the heat-sensitive nozzle opened by introducing air into the container body through the valve hole in the open state of the diaphragm member.

  The alarm switch mechanism corresponding to this air introduction mechanism is provided with a switch at an outer position opposite to the axial direction of the pilot valve member, and the switch is not activated by the movement of the pilot valve member due to the pressurization holding state of the extinguishing liquid stored in the container body. Switching to the operating position, the switch is switched to the operating position by the movement of the pilot valve member to the initial position accompanying the opening operation of the thermal nozzle, and an operation detection signal is output.

In another form of the air introduction mechanism,
Slidably mounted the end of the container body as a cylinder, a piston member for partitioning the housing portion of the fire extinguishing agent solution,
A valve seat formed in the opening of the accommodating portion side of the fire extinguishing agent solution axial bore extending through the piston member,
A check valve member that is loosely fitted in the shaft hole of the piston member and opens and closes the shaft hole in contact with the valve seat;
In the atmospheric pressure in the container body, a first spring biasing supporting the check valve member to the initial position of the accommodating portion side of the fire extinguishing agent solution determined by the first stopper,
A second spring that biases and supports the piston member at an initial position where the check valve member determined by the second stopper is released away from the valve seat in an atmospheric pressure state in the container body;
The piston member is moved outward in a state where the check valve member is pressed against the valve seat by the extinguishing chemical filled in the container body and the shaft hole is closed, and the first spring and the second spring are compressed. The pressure member is maintained, and the piston member and the check valve member are moved to the initial position by the first spring and the second spring in accordance with the change from the pressurized state in the container body to the atmospheric pressure state by the opening operation of the thermal nozzle. After returning, the fire extinguishing liquid is allowed to flow naturally from the thermal nozzle that is opened by introducing air into the container body through the shaft hole in the open state of the piston member.

The alarm switch mechanism corresponding to this air introduction mechanism is provided with a switch at an outer position opposite to the axial direction of the piston member, and the switch is inactivated by the movement of the piston member due to the pressurization holding state of the extinguishant liquid stored in the container body. The switch is switched to the operating position by the movement of the piston member to the initial position accompanying the opening operation of the thermal nozzle, and the operation detection signal is output.

According to the present invention, the opening operation of the thermal nozzle is performed by a simple and compact mechanism structure for any of the normal atmospheric pressure method, the normal negative pressure method, and the normal slight pressure method of the container main body containing the extinguishing liquid. the like can be performed reliably output to the alarm display or Utsuriho Show natural operation detection signal by detecting the outflow actuation by a stream at atmospheric pressure by air introduced extinguishing chemical accompanying.

According to the present invention, by dripping extinguishing chemical fire extinguishing object by natural flow-down during the fire, the fire cooking oil to prevent the oil splash large and danger to humans of oil or fire extinguishing chemical Can be avoided with certainty.

Also since the release of the fire extinguishing liquid chemical by natural runoff from directly above, extinguishing chemical is put into 100% deep fryer, Therefore it is not necessary to consider the loss due to scattering of the fire extinguishing agent solution, to reduce the storage amount of extinguishing liquid medicine This makes it possible to reduce the weight and size of the container.

  In addition, since the extinguishing agent solution is quietly added little by little, it is possible to prevent a deflagration phenomenon and a momentary flame burn-up.

Also is or also normal when the negative pressure system to a normal time of fine pressurizing method, a fire extinguishing chemical because it is gravity flow may mechanism opening operation of the heat nozzle with or without pressure storage container, the gas pressure There is no need for a check, no pressure gauge, no periodic inspection and no maintenance, and a device that maintains a stable fire extinguishing performance can be supplied.

Furthermore, since the introduction of air into the container body is performed when the thermal nozzle is opened, the fire extinguishing liquid in the container body does not come into contact with the outside air in a steady state, preventing deterioration of the fire extinguishing liquid, and extinguishing the fire. The leakage of chemicals can be reliably prevented.

  FIG. 1 is an explanatory view showing an embodiment of a range hood fire extinguishing apparatus according to the present invention which always adopts an atmospheric pressure system. In FIG. 1, the range hood fire extinguishing apparatus 10 </ b> A of the present invention is configured by a container main body 12 and a thermal nozzle 14 </ b> A that is separately installed at two locations below the container main body 12. The container body 12 is a cylindrical member with both ends closed, and contains a fire extinguishing liquid 16 inside and sealed with a plug 18 at the left end.

  The range hood fire extinguishing apparatus 10A is installed in the range hood so that the thermal nozzle 14A is in the vicinity immediately above the range. In the present embodiment, the range is provided with a two-hole stove, and two thermal nozzles 14A are provided in accordance with the interval of the stove.

  If a tempura fire occurs with the range hood fire extinguisher 10A installed in the range hood, the fusible part of the thermal nozzle 14A melts and opens when it reaches a certain temperature, and is stored in the container body 12. The fire extinguisher liquid 16 is allowed to flow into the pan where the tempura fire is caused by natural flow. The air layer 15 is not always necessary.

  FIG. 2 is a sectional view illustrating the thermal nozzle 14A shown in FIG. FIG. 2A shows a steady installation state, in which the thermal nozzle 14A is screwed and fixed to the mounting portion 21 provided at the lower portion of the container main body 12 from below, and the upper portion of the nozzle main body 20 is the upper portion of the container main body 12. The upper end is opened at the position of the upper air layer 15 through the inside. A fire extinguisher liquid 16 is accommodated in the container body 12 so that the liquid surface 11 is positioned at the upper part while leaving a slight air layer 15 at the upper part. The air layer 15 is not always necessary.

  In the present embodiment, the outlet 22 is divided into four locations around the bottom of the container body 12 of the nozzle body 20. An air introduction tube 24 is disposed inside the nozzle body 20. A collar 25 is attached to the upper end of the air introduction pipe 24 and is provided so as to be movable up and down in the nozzle body 20.

  At the lower end of the air introduction tube 24, a flare portion 24a that is widened in a skirt shape is formed. The air introduction pipe 24 is used as a passage for introducing air, and a gap between the outside of the air introduction pipe 24 and the inside of the nozzle body 20 is used as an outflow gap 26 for allowing the extinguishing chemical solution 16 to flow out.

  A stopper 30 fitted with an O-ring 32 is disposed below the nozzle body 20. The stopper 30 closes the lower end of the air introduction pipe 24 and the outflow gap 26 outside thereof. The stopper 30 is held at the closed position shown in the figure by soldering and fixing with a soluble portion 35 of the heat collecting plate 36 with respect to a supporter 34 attached to the lower portion of the nozzle body 20. In addition, a spring 28 is incorporated inside the lower part of the nozzle body 20 to urge the stopper 30 in the opening direction (downward).

  FIG. 2B shows the opening operation of the thermal nozzle 14A. If a tempura fire occurs and the soluble part 35 of the thermal nozzle 14A reaches a certain temperature and melts, the stopper 30 and the heat collecting plate 36 are dropped by the force of the spring 28, and the thermal nozzle 14A is opened.

  When the stopper 30 and the heat collecting plate 36 fall, the air introduction pipe 24 is pushed down by the spring 28 and the lower flare 24a protrudes. At this time, the pressure of the air layer 15 inside the container body 12 slightly increases due to the temperature rise, but this increased pressure is released through the opened air introduction pipe 24 and then the air from the air introduction pipe 24 is discharged. The air layer 15 is in an atmospheric pressure state due to the diversion.

  The fire extinguishing liquid 16 in the container body 12 flows into the outflow gap 26 between the outlet 22 of the container body 12 and the air introduction pipe 24, passes through the outside of the air introduction pipe 24, and causes a fire from the lower flare portion 24 a. Naturally flowing down toward the tempura pan, the natural flow of the extinguishing liquid 16 is continuously performed in conjunction with the inflow of air.

  Here, the lower end portion of the air introduction pipe 24 forms a flare portion 24a that spreads in a skirt shape, and the air introduction port is closed by the surface tension of the extinguishing liquid 16 that naturally flows down through the outside by the flare portion 24a. Prevents the phenomenon of inflow.

  When the inner diameter of the air introduction pipe 24 and the diameter of the lower end portion of the flare portion 24a for preventing the air introduction port from being blocked by the surface tension of the fire extinguishing liquid were experimentally determined, the inner diameter of the air introduction pipe 24 was set to 5 mm. In this case, it was confirmed that if the diameter of the lower end portion of the flare portion 24a is 10 mm or more, it is possible to prevent the air inlet from being closed due to the surface tension of the extinguishing liquid 16.

  FIG. 3 is a sectional view of a switch mechanism incorporated in the ranged fire extinguisher of FIG. In FIG. 3, a switch mechanism 40 </ b> A is incorporated at the right end of the container body 12. The switch mechanism 40 </ b> A detects a change in the liquid level 11 of the extinguishant liquid 16 using the float 52 and operates the limit switch 56.

  When detecting the liquid level 11 of the extinguishing liquid 16 stored in the cylindrical container body 12 from the float, the float cannot be enlarged because the container body 12 is downsized. When detecting and operating the limit switch, it is necessary to use a material with a specific gravity as small as possible for the float and reduce the force transmission loss by the limit switch, and further shield the extinguishing liquid 16 from leaking to the outside. A mechanism is required.

  The switch mechanism 40A satisfying such a requirement is characterized by a mechanism combining a float and a diaphragm in the present embodiment.

  In FIG. 3, the switch mechanism 40A has a holder 44 disposed in the container body 12 and is supported and fixed by screws 48, and a diaphragm 50 is sandwiched and fixed by a holder 42 having an O-ring 43 on the outer periphery thereof. Yes. A shaft 54 is supported and fixed in a penetrating state at the center of the diaphragm 50, and a float 52 that moves up and down in accordance with a change in the liquid level 11 of the extinguishing agent liquid 16 is attached to the rear of the shaft 54.

  As the float 52, for example, a hollow body made of a synthetic resin or a foamed polystyrene having a surface coated may be used. The shaft 54 on which the float 52 is mounted moves up and down in the opposite direction in accordance with the liquid level 11 of the float 52 up and down with the connecting portion of the diaphragm 50 as a fulcrum.

  A limit switch 56 is disposed outside the holder 44 by a holder 46. The limit switch 56 is provided with a switch lever 56a, and the limit switch 56 is moved to the opposite left-downward direction with respect to the downward-rightward tilt direction of the shaft 54 due to the float 52 rising by the liquid surface 11 of the extinguishing agent liquid 16 at the normal time. Oppositely arranged with an inclination direction.

  The shaft 54 pushes down the switch lever 56a of the limit switch 56 and the limit switch 56 is turned off due to the floating of the float 52 by the liquid level 11 of the extinguishing agent liquid 16 at regular time.

  FIG. 4 is an operation explanatory view of the switch mechanism 40A of FIG. FIG. 4A shows a steady monitoring state, in which the extinguishing chemical 16 stored in the container main body 12 is in a storage state in which the air layer 15 is left slightly above the liquid surface 11. For this reason, the float 52 floats up, the float 52 side rises with the connecting portion of the diaphragm 50 by the shaft 54 as a fulcrum, and the tip end side of the shaft 54 falls, and the switch 54 of the limit switch 56 is pushed off by pushing the switch lever of the limit switch 56 at the tip of the shaft 54. It is said.

  FIG. 4B is an operation explanatory diagram in a state where the thermal nozzle 14A is opened by receiving heat from a tempura fire. When the heat-sensitive nozzle 14A receives heat from the tempura fire and operates to open, the heat collecting plate 36 and the stopper 30 fall, and air is introduced as shown in FIG.

  For this reason, the liquid level 11 of the fire extinguisher liquid 16 in the container body 12 is lowered, the float 52 is lowered in accordance with the lowering of the liquid level 11, the tip of the shaft 54 is raised with the support portion of the diaphragm 50 as a fulcrum, and the switch lever 56a is When it reaches a predetermined position, the limit switch 56 is switched on from the previously switched off state, and an operation detection signal is output to the outside.

  As described above, in the switch mechanism 40A shown in FIGS. 3 and 4, the change in the liquid level 11 of the extinguishing agent liquid 16 accompanying the opening operation of the thermal nozzle 14A in the miniaturized container body 12 is slightly increased by the float 52. The movement can be converted into the movement of the shaft 54 supported by the diaphragm 50, and the switch lever 56a of the limit switch 56 can be operated with sufficient driving force and displacement to output an operation detection signal. The chemical solution 16 is sealed so as not to leak.

  The diaphragm 50 slightly strokes in the axial direction according to the rise and fall of the internal pressure due to the rise and fall of the temperature of the container body 12 to move the shaft 54. By using a hard material for the diaphragm 50, however, Stroke due to temperature change can be suppressed within a certain value. Further, a limiting plate for limiting the axial movement may be provided in the vicinity of the diaphragm 50.

  The fire extinguisher is attached to the range hood so that the thermal nozzle is reduced in size so that it does not stand out. However, if the size can be increased and the diameter of the air introduction tube 24 can be increased, a flare 24a is formed. You don't have to. Further, the degree of lowering of the air introduction pipe 24 at the time of a fire may be up to the lower end discharge portion of the thermal nozzle 14A. In addition, the air introduction pipe 24 does not necessarily have to be positioned at the top at first. If the structure is such that the introduction of the air and the discharge of the extinguishing chemical liquid are correctly performed and the extinguishing chemical liquid is normally sealed by the stopper 30, the thermal nozzle 14A. It may be below from the beginning.

  FIG. 5 is a cross-sectional view showing another embodiment of a thermal nozzle provided in the range hood fire extinguishing apparatus 10A of FIG.

  FIG. 5A shows a thermal nozzle 14B as another embodiment in a steady start state. The nozzle main body 58 is screwed and fixed to the lower part of the container main body 12, and the air introduction pipe 60 is guided 61 in the nozzle main body 58. It supports in the standing state.

  The air introduction pipe 60 is a hollow pipe member, the upper end of which is located in the air layer 15 above the liquid surface 11 of the extinguishing agent solution 16, and the bellows pipe 62 is disposed in a state of being contracted to the air layer 15. . The bellows tube 62 functions to keep the upper portion of the air introduction tube 60 at the position of the air layer 15 when the air introduction tube 60 is dropped by the opening operation of the thermal nozzle 14B.

  At the same time, the bellows tube 62 functions as a spring that urges the air introduction tube 60 in the opening direction (downward). A spring may be built in the bellows tube 62. Further, the lower end of the air introduction pipe 60 forms a flared portion that is widened like a skirt like the thermal nozzle 14A of FIG. 2, and a spring 45 is incorporated between the flare portion and the guide 61.

  A stopper 64 fitted with an O-ring 66 is disposed at the lower part of the nozzle body 58, and the stopper 64 is incorporated and fixed in a closed state by soldering and fixing the soluble portion 70 of the heat collecting plate 68 to the lower end of the nozzle body 58. .

FIG. 5B is an explanatory diagram of the operating state of the thermal nozzle 14B. In FIG. 5 (B), when the temperature of the fusible part 70 reaches a certain temperature and melts due to heat from the tempura fire, the heat collecting plate 68 and the stopper 64 fall, and the restoring force of the bellows tube 62 and the spring 45 The air introduction pipe 60 falls and stops at a position where the stopper ring 63 hits the guide 61.

  At this time, the upper end of the air introduction pipe 60 is lowered from the liquid level 11 of the extinguishing agent solution 16, but the bellows pipe 62 attached to the upper portion extends so that the air inlet of the air introduction pipe 60 is an air layer above the liquid level 11. 15 can be left.

  As a result, outside air is introduced into the air layer 15 of the container body 12 through the air introduction pipe 60 and the bellows pipe 62, and the fire extinguishing liquid 16 naturally flows through the gap between the air introduction pipe 60 and the nozzle body 58. It begins to flow into the tempura pot that is causing the fire.

  FIG. 6 is an explanatory view showing an embodiment of a range hood fire extinguishing apparatus according to the present invention which always uses a negative pressure system. In FIG. 6, the range hood fire extinguishing apparatus 10 </ b> B that always uses the negative pressure method stores the fire extinguishing chemical 16 in the container body 12, and the fire extinguishing chemical 16 is activated by the operation of the negative pressure generating mechanism 71 incorporated on the right side of the container main body 12. Is in a negative pressure state.

  Two thermal nozzles 14 </ b> C are attached to the lower part of the container body 12 so as to correspond to the two-hole stove of the range. In addition, a plug 18 used to store the fire extinguishing liquid 16 is attached to the left end of the container body 12. Further, a limit switch 74 for outputting an operation detection signal is provided on the right side of the negative pressure generating mechanism 71.

  FIG. 7 is a sectional view illustrating the thermal nozzle 14C and the negative pressure generating mechanism 71 shown in FIG. In FIG. 7, the thermal nozzle 14 </ b> C has a nozzle body 58 screwed and fixed to the lower mounting portion 21 of the container body 12, and the nozzle body 58 passes through the outflow hole 76 in the axial direction and has a heat collecting plate 78 at the bottom. While being mounted, the lower end of the outflow hole 76 is closed by soldering the fusible portion 80.

  The thermal nozzle 14C of the present embodiment does not have an air introduction mechanism like the thermal nozzle 14A of FIG. 2, and when the fusible part 80 rises to a certain temperature and melts, the outflow hole 76 is opened and the fire extinguishing liquid 16 flows out. .

  The negative pressure generating mechanism 71 always puts the extinguishing chemical 16 stored in the container main body 12 in a negative pressure state, introduces air into the container main body 12 when the thermal nozzle 14C is opened, and puts the container main body 12 in an atmospheric pressure state. The fire extinguisher liquid 16 is allowed to flow down naturally from the heat-sensitive nozzle 14 </ b> C opened in step 1.

  The negative pressure generating mechanism 71 incorporates a piston 84 having an O-ring 85 that is slidable with the right side of the container body 12 as a cylinder portion. The piston 84 is guided in the axial direction by the guide 90 and strokes, and a spring 88 is incorporated between the guide 90 and a disk 86 fixed to the outer end of the piston 84 with a bolt 87, and the piston 84 is moved outward, that is, the container body 12. It is energized in the direction to increase the storage capacity of the.

  An intake port 82 is opened at a predetermined position on the left side of the guide 90 on which the piston 84 of the container body 12 is disposed. FIG. 7 shows a normal monitoring state. In this state, the intake port 82 is provided in the piston 84. The outside of the sealing position by the O-ring 85 and the inside of the container containing the fire extinguishing chemical 16 are separated from the atmospheric pressure.

  FIG. 8 is an operation explanatory diagram of the thermal nozzle 14C and the negative pressure generating mechanism 71 of FIG.

  FIG. 8A shows an initial state before the extinguishing chemical solution is stored in the container main body 12, and the inside of the container main body 12 is in an atmospheric pressure state by removing the plug 18 shown in FIG. It is pushed by 88 and strokes outward, and the switch knob of the limit switch 74 is pushed in with the bolt 87 of the disk 88.

  When filling the extinguishing agent solution in such an initial state, the cover 75 is removed as shown in FIG. 6B, and the disk 86 is pushed in by hand to make the spring 88 compressed. The fire extinguishing liquid 16 is stored so as not to leave an air layer.

  When the extinguishing solution 16 is stored, the plug 18 shown in FIG. 6 (see FIG. 1) is attached and sealed. When the extinguishant liquid 16 is stored and sealed, the disk 86 is released. As a result, the piston 84 is urged by the force of the spring 88 in the direction in which the volume of the storage part for the extinguishing chemical solution 16 is expanded, that is, the outward direction, and the storage state of the extinguishing chemical solution 16 in the container body 12 is set to a negative pressure state.

  Once such a negative pressure state has been set, the cover 75 is attached as shown in FIG.

  Subsequently, as shown in FIG. 8D, when the fusible part 80 of the thermal nozzle 14C reaches a certain temperature and melts due to heat from the tempura fire, the outflow hole 76 opens to connect the inside of the container to the outside air, and the container body 12 Inside changes from a negative pressure state to an atmospheric pressure state.

  For this reason, the piston 84 is moved to the right side by the force of the spring 88, and the bolt 87 of the disk 86 is pushed in contact with the switch knob of the limit switch 74, whereby the limit switch 74 is switched from the switch-off state to the switch-on state. Can be output.

  Further, when the piston 84 strokes to the right side, the air inlet 82 provided at the upper portion of the container body 12 is positioned on the left side of the O-ring 85 of the piston 84, and outside air is introduced into the storage portion for the extinguishing liquid 16 and thereby opened. The fire extinguisher liquid 16 can be allowed to flow naturally from a certain thermal nozzle 14C.

  In addition, in the embodiment of the range hood fire extinguishing apparatus 10B that adopts the always negative pressure method of FIG. 6, the thermal nozzle 14C that does not have the air introduction mechanism accompanying the opening operation is used as the thermal nozzle. The thermal nozzles 14A and 14B provided with the air introduction mechanism shown in FIG. 5 can also be used. In this case, both the thermal nozzle and the negative pressure generating mechanism 71 introduce air into the container when the thermal nozzle is opened. The fire extinguishing liquid 16 may naturally flow down by introducing air only by the thermal nozzles 14A and 14B without providing the suction port 82.

  The advantage of the constant negative pressure method in the present embodiment is that the extinguishing chemical liquid 16 stored in the container main body 12 in the use state attached to the range hood is always in a negative pressure state, so that the extinguishing chemical liquid leaks from the container. In addition, when the soluble part 80 of the thermal nozzle 14C is melted by receiving heat from a tempura fire, the extinguishing agent liquid is not ejected due to an increase in internal pressure or the like. Opens the outflow hole 76 in the form of being sucked into the negative pressure inside the container, and the subsequent introduction of air allows the fire extinguishing liquid 16 to flow out into the tempura pan gently under natural flow from the beginning.

  FIG. 9 is an explanatory view showing an embodiment of a range hood fire extinguishing apparatus according to the present invention which always employs a slightly pressurized system. 9, in the range hood fire extinguishing apparatus 10C that always uses a slightly pressurized system, the thermal nozzle 14A having the air introduction mechanism shown in FIG. The switch mechanism 40 </ b> B is incorporated at the right end of 12.

  The thermal nozzle 14A has the same structure and operation as shown in FIG. In the switch mechanism 40B, a diaphragm 92 is disposed between a holder 42 to which an O-ring 43 is attached and a holder 44 fixed by a screw 48, thereby partitioning the storage portion for the extinguishing liquid 16 stored in the storage container 12. .

  The end portion of the shaft 94 is fixed to the center portion of the diaphragm 92, the tip end of the shaft 94 is taken out to the outside, and a limit switch 56 provided in the holder 46 is disposed here.

  A plate 47 is disposed in the passage portion of the shaft 94 in the holder 44, and a spring 45 is disposed between the plate 47 and the fixed portion of the diaphragm 92, so that the fire extinguishing liquid 16 containing the diaphragm 92 is attached in the pressurizing direction. It is fast.

  The extinguishing agent liquid 16 stored in the container body 12 has a liquid surface 11 with a slight air layer 15 left on the upper part, and is slightly pressurized by applying a slight pressure during storage. As the slight pressurization in the housed state of the extinguishing agent solution 16, for example, a slight pressure of about 0.1 Pascal is applied.

  The diaphragm 92 is deformed against the spring 45 by the pressurization due to the slight pressurization when the extinguisher liquid 16 is filled, and pushes the switch lever 56a of the limit switch 56 by pushing the shaft 94 to switch off. State.

  FIG. 10 is an operation explanatory view of the thermal nozzle 14A and the switch mechanism 40B of FIG. FIG. 10 (A) is a steady monitoring state, and since the slight pressurization method is always used, the extinguishing chemical solution 16 stored in the container body 12 is slightly pressurized, and the diaphragm 92 of the switch mechanism 40B is The limit switch 56 is switched off by the movement of the shaft 94 by being pressed and deformed outward.

If a tempura fire occurs in this state, the fusible part of the thermal nozzle 14A is melted as shown in FIG. 10B, and the heat collecting plate 36 and the stopper 30 are dropped and the release operation is performed. When the thermal nozzle 14A opens actuated simultaneously extinguishing agent solution when air is introduced into the container body 12 is gravity flow, it is poured into deep fryer undergoing fire.

  Further, when the inside of the container body 12 is lowered to the atmospheric pressure by the opening operation of the thermal nozzle 14A, the diaphragm 92 of the switch mechanism 40B is pushed by the spring 45 (see FIG. 9) and displaced to the left side, and the shaft 94 is pulled. As a result, the switch lever 56a of the limit switch 56 is activated to be switched on, and an operation detection signal is output to the outside.

  Here, in the range hood fire extinguishing apparatus 10C that always uses the slightly pressurized system in FIGS. 9 and 10, the air layer 15 is slightly provided in order to reduce the increase in internal pressure due to the temperature increase in the installed state. When rubber is used as the diaphragm 92, the air layer 15 comes into contact with the diaphragm 92, so that the atmosphere of the air layer 15 in a slightly pressurized state is released by gas exchange of the rubber diaphragm 92, and the pressure is reduced to atmospheric pressure. there's a possibility that.

  To reduce the pressure due to the gas exchange of the diaphragm 92, the contact area of the air layer of the diaphragm is reduced, and the diaphragm is always immersed in the fire extinguishing liquid 16 or a sheet of Teflon (R) is used. What is necessary is just to stick on the surface.

  FIG. 11 is an explanatory diagram of another embodiment for minimizing the air layer contact area with respect to the diaphragm of the switch mechanism 40B in the range hood fire extinguishing apparatus 10C that always employs a slightly pressurized system.

  In the embodiment of FIG. 11, a partition wall 42a is formed on the storage side of the extinguishant liquid 16 of the holder 42 that stores the diaphragm 92 of the switch mechanism 40B, and a connecting hole 49 is provided below the partition wall 42a. However, the air layer 15 is separated from the storage portion of the diaphragm 92 by the partition wall 42a.

  For this reason, the diaphragm 92 only exchanges gas with the outside for the air pool slightly located in the inner portion partitioned by the partition wall 42a, and the air layer 15 in the container body 12 partitioned by the partition wall 42a is formed by the diaphragm 92. The pressure drop due to gas exchange can be surely prevented without contacting with 92. Other configurations and operations are the same as those in the embodiment of FIG.

  FIG. 12 is an explanatory view showing another embodiment of a range hood fire extinguishing apparatus 10C according to the present invention which always uses a slightly pressurized system. In this embodiment, the diaphragm used in the embodiment of FIG. Instead, a metal bellows is used.

  In FIG. 12, a thermal nozzle 14 </ b> A is provided at the lower part of the container body 12, which is the same as the embodiment of FIG. 9, but a holder 96 having an O-ring 95 as a switch mechanism 40 </ b> C on the right side of the container body 12. A bellows 98 is attached.

  The bellows 98 is made of metal and expands and contracts in the axial direction according to the pressure in the container body 12. On the outer end side of the bellows 98, a limit switch 56 is disposed in a holder 46.

  FIG. 13 is an operation explanatory view of the thermal nozzle 14A and the switch mechanism 40C of FIG. FIG. 13A shows a constant monitoring state by a constant pressurization method, and the extinguishing liquid 16 stored in the container main body 12 is pressurized by a slight pressurization at the time of storage. Therefore, the bellows 98 is in a slightly pressurized state. The sensor is extended under pressure, and the switch lever of the limit switch 56 is pushed in so that the switch is turned off.

  Should a tempura fire occur in this state, the thermal nozzle 14A is opened as shown in FIG. 13B, and air is introduced and at the same time the fire extinguishing liquid is allowed to flow down naturally. From the pressure state to the atmospheric pressure state.

  By the change to the atmospheric pressure state inside the container, the bellows 98 contracts to operate the switch lever 56a, the limit switch 56 is switched on, and an operation detection signal can be output to the outside.

  In the present embodiment using the bellows 98, since the bellows 98 is made of, for example, metal, there is no gas exchange with the outside as in the case of using a rubber diaphragm. The pressurized state can be reliably maintained.

  FIG. 14 is an explanatory view showing another embodiment of a range hood fire extinguishing apparatus 10C according to the present invention which always uses a slightly pressurized system. In FIG. 14, a range hood fire extinguishing apparatus 10 </ b> C that always employs a slightly pressurized system is equipped with a thermal nozzle 14 </ b> C having a simple structure that does not have an air introduction mechanism at the lower part of the container body 12, and accordingly, on the right side of the container body 12. An air introduction mechanism 72A is provided.

  The air introduction mechanism 72A is a fire extinguisher in which the holder 100 with the O-ring 101 attached to the end of the container body 12 is fixed with screws, and the diaphragm 104 is attached to the outer side of the container body 12 with the holder 102 attached. The chemical solution 16 is sealed.

  The diaphragm 104 has a valve hole 106 formed in the center thereof, and the valve part 110 at the tip of the pilot valve body 108 is always located in a slightly pressurized state and is closed in the valve hole 106.

  The pilot valve body 108 is slidably provided on a holder 115 that is assembled coaxially with the holder 102. The stopper 112 is fixed to the outside, and the switch knob 74a of the limit switch 74 supported by a cover is pressed. In this state, the limit switch 74 is switched off.

  A first spring 114 is incorporated between the holder 115 and the pilot valve body 108 to urge the pilot valve body 108 toward the diaphragm 104 side. A second spring 116 is disposed coaxially with the first spring 114 between the holder 115 and the diaphragm 104, and urges the diaphragm 104 toward the container body 12 side. Further, the portion of the holder 102 that is outside the diaphragm 104 communicates with the outside through the air inlet 105.

  Furthermore, in this embodiment, in order to avoid gas exchange due to the contact of the air layer 15 with the diaphragm 104, a conical constriction portion 100a is formed for the left holder 100 supporting the diaphragm 104, and the air Contact of the layer 15 with the diaphragm 104 and gas exchange are suppressed.

  FIG. 15 is an operation explanatory view of the thermal nozzle 14C and the air introduction mechanism 72A of FIG.

  FIG. 15A shows an initial state before the extinguishing liquid 16 is stored in the container body 12, and the inside of the container body 12 is in an atmospheric pressure state. In this initial state, the diaphragm 104 is pushed by the second spring 116 and is in an initial position located on the container body 12 side.

  The pilot valve body 108 is pushed by the first spring 114 and the stopper 112 is in a position where it abuts against the holder 115, and the valve portion 110 at the front end is in a valve hole opening position in front of the valve hole 106 of the diaphragm 104. This is the initial position.

  FIG. 15B shows a state in which the extinguishing chemical 16 is stored in a slightly pressurized state, and the diaphragm 104 is pushed outward by the pressurization accompanying the storing of the extinguishing agent 16 in the slightly pressurized state, which is the same as shown in FIG. It is in a monitoring state by a constant fine pressurization method.

  If a tempura fire occurs in this state, the fusible part 80 of the thermal nozzle 14C reaches a certain temperature and melts as shown in FIG. Then, the container body 12 changes from the slightly pressurized state to the atmospheric pressure state.

  For this reason, the diaphragm 104 is pushed by the second spring 116 and returns to the initial position, and at the same time, the pilot valve body 108 is also pushed by the first spring 114 to return to the initial position and is stopped by the stopper 112.

  At the position where the pilot valve body 108 is stopped by the stopper 112, the valve portion 110 is in the valve hole 106 of the diaphragm 104 and is in the closed state. However, the diaphragm 104 is in the second spring as shown in FIG. It is further pushed by 116 and moves to the storage side of the extinguishing chemical solution 16, whereby the valve hole 106 is released from the valve part 110 of the pilot valve body 108 and opened, and air enters the container body 12 from the intake port 105 of the holder 102. It is introduced through the valve hole 106.

  In conjunction with the introduction of the air into the container body 12, the fire extinguishing liquid 16 flows out from the outflow hole 76 of the thermal nozzle 14C in an open state toward the tempura pan by natural flow.

  FIG. 16 is an explanatory view showing another embodiment of the range hood fire extinguishing apparatus 10C according to the present invention which always adopts a slightly pressurized system. In FIG. 16, a range hood fire extinguishing apparatus 10 </ b> C that always employs a slightly pressurized system is equipped with a simple thermal nozzle 14 </ b> C that does not have an air introduction function at the bottom of the container body 12, and an air introduction mechanism on the right side of the container body 12. 72B is provided.

  The air introduction mechanism 72B is characterized in that a piston structure is used in this embodiment, whereas the air introduction mechanism 72A in FIG. 14 uses a diaphragm.

  The air introduction mechanism 72B incorporates a piston 120 fitted with an O-ring 121 in a slidable manner with the right end of the container body 12 as a cylinder portion, and a piston rod portion 122 is integrally provided outside the piston 120. .

  The piston 120 is provided with a shaft hole 124 at the center, and a rod portion 128a having a check valve body 128 formed at the tip of the shaft hole 124 is provided with a gap for introducing air between the shaft hole 124 and the rod portion 128a. It is inserted in a play state to form.

  A conical valve seat 126 is formed at the opening of the piston hole 120 in the shaft hole 124, and a check valve body 128 having an O-ring 129 corresponding to the valve seat 126 is in contact with the valve seat 126 in the state shown in FIG. Closed.

  A rod portion 128 a at the rear of the check valve body 128 is connected to the first stopper 130. A second stopper 132 is attached to the end of the piston rod portion 122 outside the piston 120 by the support of the disk 135.

  A first spring 134 is incorporated between the first stopper 130 at the rear of the check valve body 128 and the piston rod 122 side of the piston 120, and urges the check valve body 128 in the opening direction.

  A second spring 136 is incorporated between the piston 120 and the left side of the holder 125 that supports the piston rod portion 122 fixed to the container main body 12 with a screw, and urges the piston 120 toward the storage side of the extinguishing liquid 16. ing.

  Further, a limit switch 74 is disposed at the end of the container main body 12 by a cover, and the switch knob 74a is pushed in with a stroke to the outside of the piston 120 in the always slightly pressurized state shown in the figure, so that the switch is turned off.

  FIG. 17 is an operation explanatory diagram of the thermal nozzle 14C and the air introduction mechanism 72B of FIG. 16, and an operation explanatory diagram subsequent thereto is shown in FIG.

  FIG. 17A shows an initial state before the extinguishing chemical solution is stored in the container main body 12 in a slightly pressurized state, and the inside of the container main body 12 is in an atmospheric pressure state. In the initial state where the inside of the container body 12 is at atmospheric pressure, the piston 120 is pushed by the second spring 136 and the second stopper 132 is moved to the initial position where it is operated by the holder 125.

  Further, the check valve body 128 is in an initial position where the check valve body 128 is stopped by pressing the first spring 134 of the first stopper 130 slidably incorporated in the piston 120. It is placed in an open position away from the valve seat 126 provided in the 120 axial hole opening. The switch knob 74a of the limit switch 74 is in a protruding state, and the limit switch 74 is in a switch-on state in this state.

FIG. 17B shows the same steady state monitoring state as FIG. 16 in which the extinguishing liquid 16 is stored in the container body 12 in a slightly pressurized state. Accommodating work as a slight pressure condition of fire extinguishing agent solution, in the initial state of FIG. 17 (A), for example, the container body 12 by the required amount of fire extinguishing liquid chemical 16 to stand vertically accommodated in pressurized plug in this state When sealed, first, the check valve body 128 in an open state is pressurized and strokes against the first spring 134, abuts against the valve seat 126 and closes the air introduction path. By receiving the pressure, the stroke is integrated with the check valve body 128, and the steady monitoring state in the always slightly pressurized state as shown in FIG. 17B can be set.

  Subsequently, as shown in FIG. 18D, if a tempura fire occurs and the fusible part 80 of the thermal nozzle 14C reaches a certain temperature and melts, it may be melted by slight pressurization in the container body 12. The melted portion 80 is ejected to open the outflow hole 76, and the inside of the container body 12 changes from a slightly pressurized state to an atmospheric pressure state.

  Therefore, as shown in FIG. 18C, the piston 120 is pushed by the second spring 136 and strokes while the check valve body 128 is kept closed. Subsequently, as shown in FIG. 18D, when the stroke of the piston 120 is stopped by the contact of the second stopper 132, the check valve body 128 is stroked by being pushed by the first spring 134, and the first stopper 130 causes the stroke. It will be in the open state away from the valve seat 126 at the stop position.

  By opening the check valve body 128, air is introduced into the container body 12 from the intake port 127 through the shaft hole 124, and the fire-extinguishing liquid 16 is opened in conjunction with the introduction of air from the outside. It flows down naturally from 14C and comes to be continuously poured into the tempura pan that is causing a fire.

  In addition, in the embodiment of the range hood fire extinguishing apparatus of FIG. 14 and FIG. 16, which uses the always fine pressurization method, a simple thermal nozzle 14C having no air introduction mechanism is used as the thermal nozzle. The thermal nozzle 14A having the air introduction mechanism shown in FIGS. 2 and 3 may be used.

  When the thermal nozzle 14A is used, air is introduced into the container body 12 by the operation of both the thermal nozzle 14A and the air introduction mechanisms 72A and 72B when the thermal nozzle 14A is opened. It will flow down naturally.

  The present invention is not limited to the above-described embodiments, and includes appropriate modifications that do not impair the objects and advantages thereof. Further, the present invention is not limited by the numerical values shown in the above embodiments.

In the present embodiment, it was a fire extinguishing device that is attached to the range hood and extinguishes a fire in the range. However, the present invention is not limited to this, and a container filled with a fire extinguishing chemical solution is arranged above the ceiling or the like, and is directly below it. It can be applied to fire extinguishing devices that naturally flow down to fire extinguishing objects.

Explanatory drawing which showed embodiment of the range hood fire extinguishing apparatus by this invention which always takes an atmospheric pressure system Sectional view showing the thermal nozzle of FIG. Sectional view showing the switch mechanism using the float provided in FIG. Operational explanatory diagram of the switch mechanism of FIG. Sectional drawing which showed other embodiment of the thermal nozzle provided in the range hood fire extinguishing apparatus of FIG. Explanatory drawing which showed embodiment of the range hood fire extinguishing apparatus by this invention which always takes a negative pressure system FIG. 6 is a sectional view showing the thermal nozzle and the air introduction mechanism in FIG. Operational explanatory diagram of the thermal nozzle and air introduction mechanism of FIG. Explanatory drawing which showed embodiment of the range hood fire extinguishing apparatus by this invention which always uses a slight pressurization system Operational explanation of the thermal nozzle and switch mechanism of FIG. Explanatory drawing which showed embodiment of the switch mechanism which suppresses the pressure drop by the gas exchange of a diaphragm Explanatory drawing which showed other embodiment of the range hood fire extinguishing apparatus by this invention which always uses a slight pressurization system Operation explanatory diagram of thermal nozzle and switch mechanism of FIG. Explanatory drawing which showed other embodiment of the range hood fire extinguishing apparatus by this invention which always uses a slight pressurization system FIG. 14 is a diagram illustrating the operation of the thermal nozzle and the air introduction mechanism. Explanatory drawing which showed other embodiment of the range hood fire extinguishing apparatus by this invention which always uses a slight pressurization system Operational explanatory diagram of the thermal nozzle and air introduction mechanism of FIG. Operation explanatory diagram of thermal nozzle and air introduction mechanism following FIG.

Explanation of symbols

10A, 10B, 10C: Range hood fire extinguishing device 11: Liquid level 12: Container body 14A, 14B, 14C: Thermal nozzle 15: Air layer 16: Extinguishing chemical 18: Plug 20, 58: Nozzle body 21: Mounting portion 22: Flow Outlet 24, 60: Air introduction pipe 25: Collar 26: Outflow gap 28, 45, 88: Spring 30, 64, 112: Stopper 32, 66, 85, 95, 101, 21: O-ring 34: Supporter 42, 44, 48, 96, 100, 102, 115, 125: holders 35, 70, 80: soluble portions 36, 68, 78: heat collecting plates 40A, 40B, 40C: switch mechanism 47: plate 48: screws 50, 92, 104 : Diaphragm 52: Float 54, 94: Shaft 56, 74: Limit switch 56a: Switch lever 62: Bellows tube 71: Negative pressure generated Structure 72A, 72B: Air introduction mechanism 74a: Switch knob 75: Cover 76: Outlet hole 82: Inlet port 84, 120: Piston 86, 135: Disc 87: Bolt 90: Guide 98: Bellows 106: Valve hole 108: Pilot valve Body 110: Valve portion 114, 134: First spring 116, 136: Second spring 122: Piston rod portion 124: Shaft hole 126: Valve seat 128: Check valve body 128a: Rod portion 130: First stopper 132: First 2 stoppers

Claims (8)

A container body mounted above a fire extinguishing object and containing a fire extinguishing chemical solution at atmospheric pressure, and the fire extinguishing chemical solution is installed while the container main body is mounted on the container main body and heated to a predetermined temperature and inflowing air while flowing in air. In a fire extinguishing apparatus comprising a thermal nozzle that naturally flows down, and an alarm switch mechanism that is provided in the container body and outputs an operation detection signal to the outside in accordance with the opening operation of the thermal nozzle, the alarm switch mechanism includes:
A float member that moves up and down according to the liquid level arranged in the storage part of the extinguishing liquid in the container body;
A shaft member fixed to one end of the float member;
A diaphragm member that is disposed on the end side of the container main body and partitions the storage part for the extinguishing chemical solution, and that supports the float member so as to be swingable through the shaft member;
A switch in which a switch operating part is disposed in contact with the shaft member protruding through the diaphragm member;
The float member is lowered by the stored fire extinguishing chemical solution, the shaft member is pushed down to switch the switch to the non-operating position, and the float member accompanying a decrease in the liquid level of the fire extinguishing chemical solution due to the opening operation of the thermal nozzle The fire extinguishing apparatus, wherein the shaft member is pushed up by lowering to switch the switch to an operating position and output an operation detection signal.
A container body mounted above a fire extinguishing object and containing a fire extinguishing chemical solution, a negative pressure generating mechanism provided in the container main body and making the storage state of the fire extinguishing chemical solution a negative pressure state, and attached to the container main body, A heat-sensitive nozzle that opens to operate the natural fire-extinguishing liquid when it is heated to a predetermined temperature; and an alarm switch mechanism that is provided in the container body and outputs an operation detection signal to the outside as the heat-sensitive nozzle is opened. In the fire extinguishing apparatus comprising the negative pressure generating mechanism,
A piston member slidably mounted with the end portion of the container body as a cylinder portion;
A spring that urges the piston member in a direction to expand the storage volume in a state in which the extinguishing chemical is stored, and maintains the storage state of the extinguishing chemical in a negative pressure state;
An intake port provided in the container body that opens by movement of the biston by the spring when the negative pressure state associated with the opening operation of the thermal nozzle is opened to atmospheric pressure and introduces air into the container;
A fire extinguisher characterized by comprising:
3. The fire extinguishing apparatus according to claim 2, wherein the alarm switch mechanism is switched to an outside position relative to the axial direction of the piston member to a non-operating position while the piston member is holding a negative pressure, and the thermal nozzle is opened. A fire extinguishing apparatus comprising a switch that switches to an operation position by the movement of the piston member in accordance with an operation and outputs an operation detection signal.
A container main body that is mounted above a fire extinguishing object and that stores a fire extinguishing chemical, a thermal nozzle that is mounted on the container main body and opens when it is heated to a predetermined temperature to flow down the fire extinguishing chemical, and the thermal nozzle An air introduction mechanism for allowing air to flow into the container body in accordance with the opening operation of the container and allowing the fire-extinguishing chemical solution to flow down naturally, and an operation detection signal to be output to the outside as the thermal nozzle is opened. In a fire extinguisher equipped with an alarm switch mechanism, the alarm switch mechanism is
A diaphragm member arranged on an end side of the container main body and partitioning the storage part of the extinguishing chemical,
A shaft member supported on the outside of the diaphragm member;
A spring for biasing the diaphragm member to an initial position via the shaft member in an atmospheric pressure state of the container body;
A switch in which a switch operating part is disposed in contact with the tip of the shaft member supported by the diaphragm member;
The fire extinguishing liquid storage part and the diaphragm member are disposed, and a connection hole is opened in the lower part to communicate the fire extinguishing liquid and the diaphragm member, and the upper air layer of the storage part and the diaphragm member A partition wall that suppresses the communication of
The switch is switched to the non-operating position by the movement of the shaft member due to the deformation of the diaphragm member due to the pressurizing and holding state of the extinguishant liquid stored in the container body, and the diaphragm member accompanying the opening operation of the thermal nozzle A fire extinguisher that outputs an operation detection signal by switching the switch to an operation position when moved to an initial position.
A container main body that is mounted above a fire extinguishing object and that stores a fire extinguishing chemical, a thermal nozzle that is mounted on the container main body and opens when it is heated to a predetermined temperature to flow down the fire extinguishing chemical, and the thermal nozzle An air introduction mechanism for allowing air to flow into the container body in accordance with the opening operation of the container and allowing the fire-extinguishing chemical solution to flow down naturally, and an operation detection signal to be output to the outside as the thermal nozzle is opened. In the fire extinguishing apparatus equipped with an alarm switch mechanism, the air introduction mechanism is
A diaphragm member that is disposed on the end side of the container body and partitions the storage part for the extinguishing chemical solution, and has a valve hole opened,
A pilot valve member having a valve portion for opening and closing the valve hole of the diaphragm member;
A first spring that biases and supports the pilot valve member at an initial position on the diaphragm member side determined by a stopper in an atmospheric pressure state in the container body;
A second spring that biases and supports the valve hole of the diaphragm member at an initial position opened away from the pilot valve member in an atmospheric pressure state in the container body;
The first spring in a state in which the diaphragm member is pressed and deformed outward by the fire extinguishing chemical filled in the container body and the valve hole is fitted to the valve portion of the pilot valve member and closed. And the second spring is compressed to maintain the pressurized state, and the diaphragm is moved by the first spring and the second spring in response to a change from the pressurized state in the container body to the atmospheric pressure state by the opening operation of the thermal nozzle. The valve hole of the member and the pilot valve member are returned to the initial positions, and the fire-extinguishing chemical solution is naturally discharged from the heat-sensitive nozzle opened by introducing air into the container body through the valve hole in the open state of the diaphragm member. A fire extinguisher characterized by flowing down.
6. The fire extinguishing apparatus according to claim 5 , wherein the alarm switch mechanism is provided with a switch at an outer position opposed to the axial direction of the pilot valve member, and the pilot according to the pressurizing and holding state of the fire extinguishing liquid stored in the container body. The switch is switched to the non-operating position by the movement of the valve member, and the switch is switched to the operating position by the movement of the pilot valve member to the initial position accompanying the opening operation of the thermal nozzle, and an operation detection signal is output. Fire extinguishing equipment.
A container main body that is mounted above a fire extinguishing object and that stores a fire extinguishing chemical, a thermal nozzle that is mounted on the container main body and opens when it is heated to a predetermined temperature to flow down the fire extinguishing chemical, and the thermal nozzle An air introduction mechanism for allowing air to flow into the container body in accordance with the opening operation of the container and allowing the fire-extinguishing chemical solution to flow down naturally, and an operation detection signal to be output to the outside as the thermal nozzle is opened. In the fire extinguishing apparatus equipped with an alarm switch mechanism, the air introduction mechanism is
A piston member that is slidably mounted with the end side of the container main body as a cylinder part, and partitions the storage part for the extinguishing chemical,
A valve seat formed in an opening on the housing part side of the extinguishing chemical solution of the shaft hole penetrating the piston member;
A check valve member that is loosely fitted in the shaft hole of the piston member and opens and closes the shaft hole in contact with the valve seat;
A first spring that biases and supports the check valve member at an initial position on the side of the storage part of the extinguishing liquid determined by a first stopper in an atmospheric pressure state in the container body;
A second spring that biases and supports the check valve member, which is determined by a second stopper, separated from the valve seat and opened in an atmospheric pressure state in the container body;
The piston member is moved outward in a state where the check valve member is pressed against the valve seat by the fire extinguishing chemical filled in the container body and the shaft hole is closed, and the first spring and The piston member is compressed by the first spring and the second spring in response to a change from the pressurized state in the container main body to the atmospheric pressure state due to the opening operation of the thermal nozzle, by compressing the second spring. And returning the check valve member to the initial position and introducing the air into the container main body through the shaft hole in the open state of the piston member and allowing the fire-extinguishing liquid to flow down spontaneously from the open thermal nozzle. Fire extinguishing device characterized by.
8. The fire extinguishing apparatus according to claim 7 , wherein the alarm switch mechanism is provided with a switch at an outer position opposed to the axial direction of the piston member, and the piston member according to a pressurizing and holding state of the extinguishing liquid stored in the container body. The switch is switched to the non-actuated position by the movement of the switch, and the switch is switched to the actuated position by the movement of the piston member to the initial position accompanying the opening operation of the thermal nozzle to output an operation detection signal. apparatus.

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