JP6472825B2 - Blower alarm device - Google Patents

Description

  The present invention relates to an alarm device for a blower that can notify a user when a blower is used at a pressure exceeding the upper limit of the working pressure range defined for the blower.

  If a general blower continues to be used at a pressure exceeding the upper limit of the working pressure range, the compressor is likely to fail and malfunction, and the compressor may not be repairable. In order to prevent such use outside the operating pressure range, for example, in Patent Document 1, the discharge pressure from the discharge piping of the blower is detected by a sensor, and the detected discharge pressure is outside the set reference pressure range. When this happens, the user can be notified of this by an alarm.

Japanese Patent No. 3976072

  However, such an alarm device has to be provided with an alarm mechanism that requires a power source in the alarm device.

  An object of the present invention is to provide a blower alarm device that can notify a user of use at a pressure exceeding the upper limit of the use pressure without requiring a power supply for the blower alarm device itself.

  That is, when the blower is used at a pressure exceeding the upper limit of the operating pressure range defined for the blower, the main flow passage through which the discharge air from the blower passes, the branch flow passage branched from the main flow passage, and the blower, An opening mechanism that opens the branch flow path by the discharge pressure from the branch flow path, and a sound emission port that emits a whistle sound when the blower discharge air flows forward from the branch flow path when the branch flow path is opened, There is provided an alarm device for a blower having an alarm mechanism capable of generating a whistle as an alarm sound.

  By attaching the alarm device for a blower between the blower discharge port and the discharge object, it is possible to notify the user of the use at a pressure exceeding the upper limit of the use pressure of the blower. Moreover, it is not necessary to provide an alarm mechanism that requires a power supply, unlike a conventional blower with an alarm device for a blower.

  Specifically, the opening mechanism is applied with a discharge pressure of a certain level or more by the discharge air of the blower flowing through the branch flow path, so that the displacement stopper is displaced in the discharge direction to open the branch flow path, And a spring for urging the displacement plug to a position for closing the branch passage.

  The release mechanism is provided at a pressure upper limit adjustment screw and a tip of the pressure adjustment screw, and when the pressure upper limit adjustment screw is tightened, the spring is compressed between the displacement stopper and the displacement stopper is displaced. And an adjusting plate for increasing the discharge pressure necessary for opening the branch flow path.

  The alarm mechanism is configured such that when the displacement stopper is displaced by a certain distance in the discharge direction from the branch flow path, a pipe port serving as an inlet for discharge air that has flowed forward from the branch flow path, and the flow to the pipe port It is possible to have an air supply space for storing the discharged air and flowing the stored discharged air to the sound outlet.

  A connecting pipe that connects the blower discharge port and the main flow path can be provided that can be removed from the inlet portion of the main flow path.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a blower alarm device according to the present invention will be described with reference to the accompanying drawings.

It is a side view of the alarm device for blowers concerning a 1st embodiment of the present invention. It is a top view of the alarm device for blowers of FIG. It is sectional drawing of the alarm device for blowers in the III-III line of FIG. FIG. 2 is a top cross-sectional view of the blower alarm device taken along line II-II in FIG. 1. It is sectional drawing of the alarm device for blowers at the time of the branch flow path open in the III-III line of FIG. It is sectional drawing of the alarm device for blowers which concerns on the 2nd Embodiment of this invention. FIG. 7 is a view showing a state where a branch flow path is opened in the blower alarm device of FIG. 6.

  As shown in FIGS. 1 and 3, the blower alarm device 10 according to the first embodiment of the present invention includes a main flow path 12 through which discharge air from a blower (not shown) passes, and a branched flow branched from the main flow path 12. A path 14, an opening mechanism 16 that opens the branch flow path 14 by the discharge pressure from the branch flow path 14, and an alarm mechanism 18 that emits a whistle sound as an alarm sound when discharge air flows from the branch flow path 14 to the front. I have. The opening mechanism 16 is displaced in the discharge direction by the discharge pressure from the branch flow path 14 to open the branch flow path 14 and urges the displacement plug 20 to the closed position where the branch flow path 14 is closed. A spring 22 is provided. The blower alarm device 10 further includes a connection pipe 26 that connects the blower outlet and the main flow path 12. The connecting pipe 26 is removable from the blower alarm device 10 and can be of various types according to the diameter of the blower outlet. By attaching the blower alarm device 10 between the blower discharge port and a discharge target such as a septic tank or a water tank, an alarm sound is output from the alarm mechanism 18 when used at a pressure exceeding the upper limit of the use pressure of the blower, as will be described later. Is coming out.

  The displacement plug 20 can be displaced in the discharge direction from the branch flow channel contact surface 28 with which the displacement plug 20 abuts by the discharge pressure from the branch flow channel 14. When the discharge pressure from the branch flow path 14 exceeds a certain level, the displacement plug 20 is displaced while compressing the spring 22 from the branch flow path contact surface 28, thereby opening the branch flow path 14, and The discharged air flows into the alarm mechanism 18.

  As shown in FIGS. 3 and 4, the alarm mechanism 18 includes a pipe port 34 that serves as an inlet for the discharge air that has flowed from the branch flow path 14, and an air supply space 38 that stores the air that has flowed from the pipe port 34. The sound outlet 36 discharges air stored in the air supply space 38 and emits a whistle sound as an alarm sound. By storing the air flowing from the tube port 34 in the air supply space 38, it is possible to emit a whistle sound stably from the sound emission port 36.

  Outside the blower alarm device 10, a water absorption preventing member 40 is provided above the sound outlet 36 in order to prevent water from entering the alarm mechanism 18 from the outside.

  As shown in FIGS. 2, 3, and 5, an adjustment plate 30 that compresses the spring 22 toward the displacement plug 20 by tightening the pressure upper limit adjustment screw 24 provided on the upper portion of the spring 22, and the pressure upper limit adjustment screw 24. It has the adjustment part 32 used as a grip part when adjusting. By compressing the spring 22 in the direction of the displacement plug 20 by pinching the adjustment unit 32 and tightening the pressure upper limit adjustment screw 24, the discharge pressure from the branch flow path 14 necessary for the displacement of the displacement plug 20 can be adjusted. it can.

  As shown in FIGS. 1 and 2, the alarm device upper portion 42 and the alarm device lower portion 44 of the blower alarm device 10 are fixed by mounting screws 46.

  Next, the operation of the alarm device for the blower will be described with reference to FIGS. First, while the blower alarm device 10 is attached between the blower discharge port and the discharge target, while the blower is used within the operating pressure range, the displacement plug 20 is branched as shown in FIG. It will be in the closed state which has contacted the road contact surface 28 and closed the branch flow path 14. FIG. At this time, since the branch flow path 14 is in a closed state, the blower discharge air that has flowed from the connection pipe 26 to the main flow path 12 and the branch flow path 14 does not flow from the branch flow path 14 to the pipe port 34. .

  When the blower is used at a pressure exceeding the upper limit of the working pressure, the displacement plug 20 is displaced while compressing the spring 22 by the discharge pressure from the branch flow path 14 as shown in FIG. The blower discharge air flowing from the connection pipe 26 to the main flow path 12 and the branch flow path 14 flows to the pipe port 34. The blower discharge air that has flowed to the pipe port 34 is emitted from the sound emission port 36 to the outside of the blower alarm device through the air supply space 38, thereby generating a whistle sound as an alarm sound.

  Thus, in the alarm device 10 for blowers, by attaching between the blower discharge port and the discharge target, an alarm sound can be emitted when used at a pressure exceeding the upper limit of the blower operating pressure. Thereby, it can inform a user that the blower is used at a pressure exceeding the upper limit of the working pressure. Further, unlike the conventional blower with an alarm device for a blower, there is no need to provide an alarm mechanism that requires a power source in the main body of the blower.

  The blower alarm device 50 according to the second embodiment of the present invention shown in FIGS. 6 and 7 is different from the blower alarm device 10 according to the first embodiment in the opening mechanism. In the opening mechanism 51 in this embodiment, the displacement stopper 20 is changed to a circular pressure receiving film 52. The outer periphery of the pressure receiving film 52 is fixed to the branch flow path 14 by the holding member 54, and when the pressure receiving film 52 is used within the operating pressure range of the blower, the branch flow path 14 is closed by the pressure receiving film 52. The pressure exceeding the upper limit of the blower operating pressure continues to be applied to the pressure receiving film 52 from the branch flow path 14, thereby breaking the pressure receiving film 52 and opening the branch flow path 14. When the blower discharge air flows from the branch flow path 14 to the pipe port 34, a whistle sound can be emitted as an alarm sound as in the first embodiment.

Alarm device 10 for blower; main flow channel 12; branch flow channel 14; release mechanism 16; alarm mechanism 18; displacement plug 20; spring 22; pressure upper limit adjusting screw 24; Adjusting part 32; pipe 34; sound outlet 36; air supply space 38; water absorption preventing member 40; alarm device upper part 42; alarm device lower part 44; mounting screw 46; blower alarm device 50; opening mechanism 51; 52; holding member 54

Claims (2)

When the blower is used at a pressure exceeding the upper limit of the operating pressure range determined for the main flow path for allowing the discharge air from the blower to pass through, the branch flow path branched from the main flow path, and the blower, A whistle sound as an alarm sound is generated by an opening mechanism that opens the branch flow path by the discharge pressure and a sound outlet that emits a whistle sound when the blower discharge air flows from the branch flow path when the branch flow path is opened. An alarm device for a blower having an alarm mechanism capable of emitting,
When the release mechanism is applied with a discharge pressure of a certain level or higher by the blower air flowing through the branch flow path, the release mechanism displaces in the discharge direction and opens the branch flow path; and A spring that urges the branch flow path to a position to close, a pressure upper limit adjustment screw, and a tip of the pressure adjustment screw. When the pressure upper limit adjustment screw is tightened, the spring is connected to the displacement plug. And an adjustment plate that increases the discharge pressure necessary to open the branch flow path due to the displacement of the displacement plug,
The alarm mechanism is configured such that the displacement plug is displaced by a certain distance in the discharge direction from the branch flow path, and a pipe port serving as an inlet for the discharge air that has flowed from the branch flow path to the pipe port. An air supply space for storing the discharged air that has flowed and flowing the stored discharged air to the sound outlet;
The air supply space is disposed at a point that passes through a flow path that is narrower than the main flow path and the branch flow path, and the flow path from the air supply space to the sound emission port is further further than the thin flow path. It is a narrow channel ,
An alarm device for a blower, wherein a water absorption preventing member is provided at an upper portion of the sound outlet .   The blower alarm device according to claim 1, further comprising a connecting pipe that connects the blower discharge port and the main flow path, and is removable from an inlet portion of the main flow path.

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