JP4377451B1 - Abnormality detection method and abnormality detection apparatus for sewage purification apparatus - Google Patents

Abstract

An abnormality detection method that is easy to install and install, can detect an abnormality in a sewage purification apparatus at an early stage, and can be manufactured and provided at a low cost with a simple structure. And an anomaly detection device.
An abnormality detection device A for a sewage purification apparatus B that detects an abnormality in a purification tank B1 and a blower B2 by a change in an intake pressure generated on an intake side of a blower B2 that supplies air into the purification tank B1. A differential pressure switch A2 is provided on the other end side of the intake tube A1 in which one end side is arranged near the opening of the intake port 11 of B2, and the energizing contact 20 of the differential pressure switch A2 is turned off by a change in the intake pressure of the blower B2. Is provided with a notification lamp A3 for notifying the maintenance time when switching from ON to ON.
[Selection] Figure 1

Description

  The present invention relates to an abnormality detection method and an abnormality detection apparatus for a sewage purification apparatus, and in particular, an intake pressure (suction pressure) of a blower that is installed outside the septic tank and supplies air to the sewage in the septic tank (aeration). ), An abnormality detection method and an abnormality detection device for detecting an abnormality of the sewage purification apparatus.

In an aerobic sewage purification device that decomposes, purifies, and discharges sewage and wastewater discharged from detached houses and apartment buildings with microorganisms (aerobic bacteria) In order to keep the inside of the tank aerobic, the air blower for supplying air (oxygen) is provided as a main device.
Therefore, in such an aerobic sewage purification apparatus, in particular, when an abnormality occurs in the blower, the inside of the septic tank cannot be maintained in a normal aerobic condition, the purification function is lowered, and untreated water from the septic tank to the river Is discharged and becomes environmental pollution.
Incidentally, the blower which is a main device in the aerobic sewage purification apparatus is a diaphragm type blower. This diaphragm type blower includes a pair of electromagnets fixed to a frame and a vibrator having permanent magnets (rods) connected to a diaphragm (chamber block) at both ends, and changes in the magnetic field generated in the electromagnet when energized. Thus, by reciprocating the vibrator by the magnetic interaction acting between the electromagnet and the permanent magnet, the diaphragm connected to the vibrator is oscillated (deformed) to discharge (send) air. It is configured.

  In order to prevent such environmental pollution, a regular legal inspection of the sewage purification apparatus is required by a maintenance inspection contractor. This statutory inspection is conducted once every three to four months. However, even if an abnormality is discovered during legal inspections that are carried out at intervals of 3 to 4 months, in most cases, untreated water that has already been contaminated from the septic tank is discharged due to a failure of the septic tank or the blower that is the main device. As a result, it will result in an after-the-fact response after it has occurred, and for that reason, the impact of environmental pollution on rivers and the like will be significant.

Then, the abnormality detection apparatus comprised so that it may detect and notify when abnormality, such as a failure, generate | occur | produces in a sewage purification apparatus is proposed (for example, refer patent document 1 etc.).
In Patent Document 1, a current detection sensor is used as an abnormality detection unit, and an abnormality is detected by monitoring changes in current consumption when the blower (air pump) is operating normally and when a failure occurs. Like to do.

Japanese Patent Laying-Open No. 2003-312183 (see paragraphs 0012 and 0015, and FIGS. 1 and 3)

  However, in the prior art described in the prior art document 1, an abnormality detection unit composed of a current detection sensor is incorporated directly into the blower by electrical connection (see FIG. 1 of Patent Document 1) or incorporated in the power cord of the blower ( For example, when installing and installing on an existing blower, it is necessary to cut the wiring in the blower or cut the power cord and connect it by soldering or the like. There was a big problem in handling such as troublesome and time-consuming, such as it was difficult to install and install at the site if necessary, and it was necessary to bring it into the service factory of the manufacturer of the blower and install it.

  Moreover, in this prior art, since the operation of the blower is stopped and the failure of the blower is detected when the current consumption falls to zero, when the abnormality detection is issued, the blower has already entered the septic tank. The supply of air was stopped, and it could only be handled after the fact that microorganisms were killed due to lack of oxygen.

  Therefore, the present invention has been developed to solve the above-described problems, and is easy and quick to install and can detect an abnormality in the sewage purification apparatus at an early stage. It is another object of the present invention to provide an epoch-making abnormality detection method and an abnormality detection apparatus which are improved so that the structure can be manufactured and provided at low cost.

In order to solve the above-mentioned problem, the abnormality detection method for a sewage purification apparatus according to the present invention is based on a change in intake pressure (suction pressure) generated on the intake side of a blower that supplies air into the septic tank. An abnormality detection method for a sewage purification apparatus for detecting an abnormality of
When the intake pressure generated at the intake port opened to the blower is a normal reference pressure, the energization contact is maintained in the OFF state, and when the intake pressure is lower than the normal reference pressure, the energization contact is in the ON state. It is characterized by notifying the switching abnormality.

  Here, the normal reference pressure is a differential pressure between the intake pressure (suction pressure) and the atmospheric pressure when the sewage purification apparatus is operating normally.

According to such a configuration, the energization contact is maintained in the OFF state when the intake pressure (suction pressure) generated on the intake side of the blower is the normal reference pressure. When the intake pressure falls below the normal reference pressure, the energizing contact is switched from the OFF state to the ON state, and notification is made that an abnormality has occurred in the septic tank and the blower.
In addition, by setting the differential pressure between the intake pressure and the atmospheric pressure generated on the intake side of the blower when the sewage purification apparatus is operating normally as a normal reference pressure (judgment pressure) when detecting an abnormality, for example, When an air diffuser (aeration pipe) installed in the septic tank is clogged, or when the air blower's intake pressure (suction pressure) changes due to a malfunction of the air blower itself, it can quickly respond to abnormalities. can do.
Thereby, a failure of the blower or the like can be quickly detected at an early stage and notified to an administrator (user) or the like.
Incidentally, the failure of the blower itself is mainly caused by the damage caused by the deterioration of the diaphragm.

Further, the abnormality detection device for the sewage purification apparatus of the present invention is a sewage that detects an abnormality in the septic tank and the blower by a change in intake pressure (suction pressure) generated on the intake side of the blower that supplies air into the septic tank. An abnormality detection device for a purification device,
An intake tube having one end arranged near the opening of the air blower or near the opening, switch means connected to the other end of the intake tube, and an energizing contact of the switch means Notification means for notifying an administrator or the like when maintenance is switched from the OFF state to the ON state, and the switch means is configured such that the intake pressure of the blower acting through the intake tube is a normal reference pressure. In this case, the energization contact is maintained in the OFF state, and the energization contact is switched to the ON state when the intake pressure falls below the normal reference pressure.

  Here, the normal reference pressure is a differential pressure between the intake pressure (suction pressure) and the atmospheric pressure when the sewage purification apparatus is operating normally, and the notification means has an energization contact of the switch means. A notification lamp that lights or blinks when the state is switched from the OFF state to the ON state is preferable. In addition to the lamp, examples of the notification means include a buzzer and sound (speaker). Then, it is possible to employ a configuration in which notification is made directly to the manager's residence and to the maintenance / inspection contractor by a transmission means such as wired or wireless.

  The switch means is not particularly limited as long as the energizing contact is switched from the OFF state to the ON state by a change in the intake pressure of the blower acting through the intake tube. For example, the inside of the switch part case is partitioned by a diaphragm into a negative pressure side to which the intake tube is connected and a positive pressure side to be released to the atmosphere, and a negative pressure side on which the intake pressure acts through the intake tube and a positive pressure side to be released to the atmosphere The difference in the configuration is that a micro switch that follows (synchronizes) the movement of the diaphragm displaced by the pressure difference and switches the energized contact to either the OFF state or the ON state is connected to the diaphragm on the negative pressure side. It is preferable to employ a pressure switch.

According to such a configuration, one end side of the intake tube faces the intake port of the blower or is positioned near the opening of the intake port and fixed immovably by appropriate fixing means, and the other end side of the intake tube The switch means connected to is attached to, for example, the building outer wall near the blower.
Thereby, installation of an abnormality detection apparatus is completed and abnormality of a septic tank and an air blower can be detected. That is, when the intake pressure (suction pressure) generated on the intake side of the blower falls below the normal reference pressure, the energizing contact of the switch means is switched from the OFF state to the ON state, and the notification means notifies that an abnormality has occurred in the septic tank and the blower. can do.
Further, since it has a simple structure composed of components such as an intake tube, a switch means including a differential pressure switch, and a notification means including a display lamp, it can be manufactured at low cost.

According to the abnormality detection method of the present invention, it is possible to detect an abnormality in the septic tank and the blower from a change in the intake pressure using the intake pressure generated on the intake side of the blower, and notify the administrator or the like.
In addition, the difference between the intake pressure of the blower and the atmospheric pressure when the sewage purification apparatus is operating normally is taken as the normal reference pressure, and the change in the intake pressure when the intake pressure falls below this normal reference pressure Abnormalities in the septic tank and blower are detected.
Thereby, an abnormality can be detected from a slight change in the intake pressure and notified to the administrator or the like. In other words, at the early stage when a minor symptom failure occurs in the blower, it is possible to detect the abnormality and notify the administrator etc., so there is a risk that the blower will stop completely because the failure state will deteriorate Can be prevented.

According to the abnormality detection device of the present invention, in addition to the operational effects described in detail in the abnormality detection method, one end side of the intake tube faces the intake opening that is opened in the blower, or in the vicinity of the opening of the intake opening. The switch means connected to the other end side of the intake tube and the notification means can be easily installed by a simple method such as attaching to the outer wall of the building, for example, near the fan. That is, as in the prior art, it is possible to easily and quickly install and install without performing any work such as wiring in the blower or power supply cord for supplying electricity to the blower by soldering or the like. .
In addition, since it has a simple structure composed of constituent elements of a notification means such as an intake tube, a differential pressure switch, and a notification lamp, it can be manufactured and provided at low cost.

It is a schematic explanatory drawing which shows an example of the sewage purification apparatus by which the abnormality detection apparatus which concerns on this embodiment was installed. It is a longitudinal cross-sectional view which shows an example of an air blower. It is a schematic explanatory drawing which shows the abnormality detection apparatus which concerns on this embodiment. It is a front view shown in the state which opened the opening-and-closing lid | cover of the apparatus box of the abnormality detection apparatus, and showed the inside of a box. An example of a differential pressure switch is shown, (a) is a front view of a state where an upper cover of a switch case is removed, and (b) is a schematic explanatory view showing a switch part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Examples of the sewage purification apparatus B to which the abnormality detection method and the abnormality detection apparatus A according to the present embodiment are applied include an aeration type single septic tank and a combined septic tank, and an aeration type water tank, a live fish tank, and a farm. it can. Here, the sewage purification apparatus B shown in FIG. 1 is taken as an example, and an abnormality detection method and an abnormality detection apparatus when applied to the septic tank B1 and a blower B2 that supplies (feeds) air (oxygen) into the septic tank B1. A will be described.
FIG. 1 is a schematic explanatory view showing an example of a sewage purification apparatus to which the abnormality detection device according to the present embodiment is applied, and FIG. 2 is a longitudinal sectional view showing an example of a blower.

≪Configuration of sewage purification equipment≫
The sewage purification apparatus B has a known structure. That is, as shown in FIG. 1, the septic tank B1 embedded in the ground with the inspection port b opened and closed by an upper cover (not shown) exposed to the ground, and the septic tank B1 installed outside the septic tank B1 It is the structure provided with air blower B2 which supplies air (oxygen) in sewage inside.
And as shown in FIG.1 and FIG.2, the air supply pipe | tube 4 by which one end side is connected to the discharge outlet 3 with which the main-body part (housing | casing) of air blower B2 is equipped is pipe-introduced in septic tank B1, and the other end side is It is connected to an aeration device (or aeration device) 5 installed in the tank. Thereby, the air discharged by the predetermined discharge force (discharge pressure) from the discharge port 3 of the blower B2 is sent to the air diffuser 5 through the air supply pipe 4, and the sewage in the septic tank B1 from the air diffuser 5 Is supplied (diffused).

  As shown in FIG. 2, the blower B <b> 2 includes an electromagnet 7 that is fixed to the frame 6, and a vibrator 10 that includes a permanent magnet (rod) 9 having both ends connected to a diaphragm (chamber block) 8. And is configured such that air is discharged (sent) by reciprocating the vibrator 10 by the magnetic interaction caused by the change of the magnetic field generated in the electromagnet 7 by energization, and the amplitude (deformation) of the diaphragm 8. It is a diaphragm type blower.

≪Configuration of anomaly detection device≫
FIG. 3 is a schematic configuration diagram showing the abnormality detection device according to the present embodiment, and FIG. 4 is a front view showing the inside of the device box of the abnormality detection device. Here, description will be made with reference to FIGS. 1 and 2 as appropriate.
As shown in FIGS. 2, 3 and 4, the abnormality detection device A includes an intake tube A <b> 1 having one end disposed near the opening of the intake port 11 opened in the main body of the blower B <b> 2, and the intake tube A <b> 1. A differential pressure switch A2 which is a switch means connected to the other end of the switch, and a notification means for notifying an administrator or the like of the maintenance time when the energizing contact of the differential pressure switch A2 is switched from the OFF state to the ON state. A certain notification lamp A3 is provided.

The intake tube A1 is formed, for example, with a thickness (inner diameter) that can be fitted into and connected to the negative pressure side opening portion described later using a material having moderate flexibility such as silicon or a synthetic resin material.
As shown in FIGS. 1 and 4, the intake tube A1 extends between a blower B2 and a differential pressure switch A2 in the device box a attached to the building outer wall K in the vicinity where the blower B2 is installed. Cut to the required length, one end is fixed in the vicinity of the air inlet 11 of the blower B2, and the other end is connected to the negative pressure side port described later of the differential pressure switch A2.

≪Differential pressure switch configuration≫
FIG. 5 is a front view of the differential pressure switch with the upper cover removed, and a schematic explanatory view showing the switch portion. Here, description will be made with reference to FIG. 3 as appropriate.
As shown in FIG. 5A, the differential pressure switch A2 includes a switch unit 13 and a switch case 14 in which the switch unit 13 is accommodated.

As shown in FIG. 5 (b), the switch unit 13 is divided into a negative pressure side 17 to which the other end side of the intake tube A1 is connected by a diaphragm 16 inside a sealed case 15, and a positive pressure side 18 that is open to the atmosphere. It is configured to be partitioned and have a micro switch 19 built in the negative pressure side 17. The microswitch 19 is connected in contact with the diaphragm 16 by a set point 19a.
As a result, the suction pressure (suction pressure) of the blower B2 follows (tunes) the movement of the diaphragm 16 that is displaced by the pressure difference between the negative pressure side 17 in the switch unit 13 acting through the suction tube A1 and the positive pressure side 18 that is open to the atmosphere. Then, the microswitch 19 is activated, and the current-carrying contact 20 of the microswitch 19 is switched to either the OFF state or the ON state.
In the present embodiment, when the sewage purification apparatus B including the septic tank B1 and the blower B2 is normally operated, the differential pressure between the intake pressure acting on the negative pressure side 17 and the atmospheric pressure on the positive pressure side 18 is determined as a normal reference. As the pressure (operating pressure), the energizing contact 20 is maintained in the OFF state when the intake pressure is the normal reference pressure, and the energizing contact 20 is switched to the ON state when the intake pressure is lower than the normal reference pressure. A differential pressure switch A2 including a microswitch 19 is employed (see FIG. 3).

The switch portion 13 configured as described above is housed integrally in the switch case 14 as shown in FIG. Specifically, the negative pressure side port 21 provided on the switch case 14 side is connected to the negative pressure side 17 of the switch unit 13 in an integrated manner, and the positive pressure side port (atmosphere release port) 22 is connected to the positive pressure side of the switch unit 13. 18 is integrally accommodated in the switch case 14 in a state of being integrally connected.
And as shown with the dashed-two dotted line in (a) of FIG. 5, the wiring (for example, it is wired over notification lamp | ramp A3) drawn in in the switch case 14 from the wiring inlet 23 provided in the switch case 14 side. Lead wires 29) are connected to the respective terminal portions 24 of the switch portion 13 respectively.

Further, the differential pressure switch A2 includes a disk-shaped setting knob 25 as shown in FIG. This setting knob 25 is a normal standard adapted to the blower B2 having different discharge capacity (discharge flow rate) according to the size (sewage treatment capacity) of the sewage purification device B (septic tank B1), the installation site (environment) of the sewage purification device B, etc. The pressure is set arbitrarily.
As a result, the setting knob 25 is turned, and the scale 26 displayed on the surface circumference of the setting knob 25 is adjusted to match the normal reference pressure at the time of detecting an abnormality, so that the normal reference pressure is reduced to the sewage purification apparatus B. It can be arbitrarily set according to the size and the installation site (environment) of the sewage purification apparatus B.

And, as shown in FIG. 4, the differential pressure switch A2 configured in this way is installed inside the door-equipped device box a having a desired size by screwing or the like. The other end side of the intake tube A1 drawn into the device box a from the provided pull-in portion 26 is inserted and connected to the negative pressure side port portion 21 of the switch case 14.
Similarly, as shown in FIGS. 3 and 4, the power cable 27 of the abnormality detection device A drawn into the device box a from the lead-in portion 26 is drawn into the outlet 28 provided in the device box a. The wiring (lead wire) 29 drawn out from the outlet 28 is drawn into the switch case 14 from the inlet 23 of the differential pressure switch A2 and connected to the terminal 24 of the switch 13 respectively. Yes. Further, the wiring 29 drawn from the outlet 28 is connected to a notification lamp A3 provided on the door 30 side of the device box a.

  The notification lamp A3 has the suction pressure (suction pressure) of the blower B2 lower than the normal reference pressure due to the septic tank B1 (clogging of the diffuser 5 and the like) and the blower B2 (breakage of the diaphragm 8, etc.). When the energizing contact 20 of the pressure switch A2 is switched from the OFF state to the ON state and a current flows through the differential pressure switch A2, an administrator (user) indicates that an abnormality has occurred in the septic tank B1 or the blower B2. It serves as a notification for such as.

The notification lamp A3 includes a light emitting diode, an incandescent bulb, a halogen lamp, a fluorescent lamp, an HID lamp, and the like, and notifies the manager or the like that it is the maintenance time of the septic tank B1 or the blower B2 by lighting or blinking. It is configured.
In the notification lamp A3, the intake pressure (suction pressure) of the blower B2 returns to the normal reference pressure, and the energizing contact 20 of the differential pressure switch A2 is switched from the ON state to the OFF state. That is, the light is turned off when the current to the notification lamp A3 is interrupted.

  In addition, although illustration is abbreviate | omitted, when the notification lamp A3 is extinguished, a changeover switch that cuts off the current flow from the differential pressure switch A2 to the notification lamp A3 and energizes the device box a can be provided. That is, the notification lamp A3 can be turned off by the changeover switch by connecting the differential pressure switch A2 and the notification lamp b2 via the changeover switch. Then, when the intake pressure (suction pressure) of the blower B2 returns to the normal reference pressure, the changeover switch is returned to the original state, so that when an abnormality occurs, the notification lamp A3 is lit or blinked to notify the administrator of the abnormality. can do.

  Further, in this embodiment, as shown in FIGS. 3 and 4, a buzzer that is a notification means for notifying an administrator of an abnormality of the sewage purification apparatus B with sound at the same time that the notification lamp A3 is turned on or flashes. A4 is provided on the lid 30 side of the device box a similarly to the notification lamp A3.

[Description of operation]
Next, the installation and installation of the abnormality detection device A according to the present embodiment configured as described above will be briefly described. Here, the case where the abnormality detection apparatus A is installed with respect to the existing sewage purification apparatus B will be described as an example. Here, description will be made with reference to FIGS. 1, 2, and 5 as appropriate.
First, at the installation site, it is confirmed that the existing sewage purification apparatus B (purification tank B1, blower B2) is operating normally. This confirmation work is performed using a dedicated device.
At the end of the confirmation work, as shown in FIG. 1, the apparatus box a of the abnormality detection apparatus A is attached to the building outer wall K in the vicinity where the blower B2 is installed, and the intake tube drawn from the apparatus box a As shown in FIG. 2, A2 is positioned in the vicinity of the opening of the air inlet 11 of the blower B2, and is fixed using a fixing tool 31 such as a clip so as not to move carelessly from the position. This operation can be easily performed by removing the upper cover of the blower B2.
Then, the power cable 27 of the abnormality detection device A is inserted into the existing external outlet 33 into which the power cable 32 of the blower B2 is inserted, and then the upper cover of the switch case 14 of the differential pressure switch A2 in the device box a is removed. Adjustment work for setting a normal reference pressure, for example, a normal reference pressure of 30 to 100 pa, by selecting a normal reference pressure according to the discharge capacity of the blower B2 from the scale by turning the setting knob 25 shown in FIG. As a result, the installation of the abnormality detection device A to the existing sewage purification device B is completed.
Finally, for example, a trial run of about 1 to 2 hours is performed, and an operation check operation is performed to determine whether or not the abnormality detection apparatus A operates normally.

Thus, according to the abnormality detection device A according to the present embodiment, it can be easily and quickly installed and installed as a device for detecting an abnormality of the existing sewage purification device B.
Then, as an abnormality detection of the sewage purification apparatus B, a change in intake pressure (intake pressure) generated at the intake port 11 of the blower B2 (change in intake pressure during normal operation and abnormal operation of the sewage purification apparatus B) is used. In addition, since the differential pressure between the intake pressure and the atmospheric pressure is set as a normal reference pressure (judgment reference pressure) when an abnormality is detected, the air diffuser 5 installed in the septic tank B1 is clogged, and the blower Abnormalities can be detected quickly in response to a slight change in the intake pressure (suction pressure) of the blower A2 due to a failure caused by the damage of the diaphragm 8 of A2. That is, when an abnormality occurs in the sewage purification apparatus B, it can be quickly detected at an early stage and notified to an administrator (user) or the like.
Accordingly, an abnormality is detected at an early stage when a light symptom failure occurs due to clogging of the air diffuser 5 or a breakage of the diaphragm 8 of the air blower A2, and in particular, an abnormality is detected at the initial stage when the light symptom failure occurs in the air blower A2. Therefore, it is possible to prevent the possibility that the failure state deteriorates and the blower A2 is completely stopped.

[Description of abnormality detection method]
Below, the abnormality detection method of the sewage purification apparatus B which concerns on this embodiment using the abnormality detection apparatus A is demonstrated.
As described above, the normal reference pressure of the differential pressure switch A2 of the abnormality detection device A is set in accordance with the discharge capacity of the blower B2 of the sewage purification device B. Thereby, when the sewage purification apparatus B is operating normally, when the intake pressure generated at the intake port 11 of the blower B2 is a normal reference pressure, the energizing contact 20 of the differential pressure switch A2 is maintained in the OFF state. Yes.
Then, due to the damage of the diaphragm 8 of the blower B2 or the clogging of the air supply device 5 in the septic tank B1, the discharge amount of the air from the discharge port 3 of the blower B2 is changed, for example, pressure reduction, airflow reduction, wind speed When a decrease or the like occurs and the intake pressure (intake pressure) generated at the intake port 11 of the blower B2 is changed below the normal reference pressure, the difference that is maintained in the OFF state by the intake pressure of the normal reference pressure. The energizing contact 20 of the pressure switch A2 is switched to the ON state. Then, a current flows through the notification lamp A3 via the differential pressure switch A2, the notification lamp A3 lights up or flashes, and the buzzer A4 sounds at the same time, and an abnormality occurs in the sewage purification apparatus B (purification tank B1, blower B2). This is notified to an administrator or the like.

The specific configuration of the embodiment of the present invention is not limited to the above-described embodiment, and there are design changes and the like without departing from the gist of the present invention described in claims 1 to 5. Are also included in the present invention.
For example, the abnormality detection device A can be configured in a compact size by, for example, directly incorporating and attaching notification means such as a notification lamp A3 and a buzzer A4 to the switch case 14 of the differential pressure switch A2. That is, as in the above-described embodiment, the abnormality detection device A can be manufactured in a compact size with only the differential pressure switch A2 without using the device box a. In this case, the power source is preferably DC. Thereby, the manufacturing cost of the abnormality detection apparatus A can be significantly reduced, and it can be provided at a lower price.

  Further, the differential pressure switch A2 is not limited to the above-described embodiment, and the intake pressure (intake pressure) generated at the intake port 11 of the blower B2 is a normal reference pressure (the differential pressure between the intake pressure and the atmospheric pressure). ), The energizing contact 20 is maintained in the OFF state, and any configuration is possible as long as the energizing contact 20 is switched to the ON state when the intake pressure falls below the normal reference pressure.

  In addition, as a notification means, a configuration such as notifying (reporting) an abnormality of the sewage purification apparatus B directly in the residence of the administrator (user) and directly to a maintenance inspection contractor using a transmission means such as wired or wireless. Can be adopted. For example, a transmitter that transmits an abnormality signal or the like when the abnormality detection apparatus A detects an abnormality is installed outside the building outer wall K or the like where the abnormality detection apparatus A is installed, while an abnormality signal from the transmitter B2 or the like. It is possible to install a receiver in the manager's residence and the management office of the maintenance inspection contractor to notify the administrator and the maintenance inspection contractor of the abnormality by the notification lamp A3, buzzer A4, etc. It becomes. In this case, a telephone line, a net line, and other existing lines can be used.

A Abnormality detection device A1 Intake tube A2 Differential pressure switch (switch means)
A3 Notification lamp (notification means)
A4 buzzer (notification means)
B Wastewater purification device B1 Septic tank B2 Blower 3 Discharge port 4 Air supply pipe 5 Air diffuser 11 Air intake port 20 Current contact

Claims (5)

An abnormality detection method for a sewage purification apparatus that detects an abnormality of the septic tank and the blower by a change in intake pressure generated on an intake side of a blower that supplies air into the septic tank,
When the intake pressure generated at the intake port opened to the blower is a normal reference pressure, the energization contact is maintained in the OFF state, and when the intake pressure is lower than the normal reference pressure, the energization contact is in the ON state. An abnormality detection method for a sewage purification apparatus, characterized by notifying a switching abnormality.   The abnormality detection method for a sewage purification apparatus according to claim 1, wherein the normal reference pressure is a differential pressure between the intake pressure and the atmospheric pressure when the sewage purification apparatus is operating normally. An abnormality detection device for a sewage purification apparatus that detects an abnormality of the septic tank and the blower by a change in intake pressure generated on an intake side of a blower that supplies air into the septic tank,
Facing the air inlet provided in the blower, or an air intake tube arranged at one end near the opening;
Switch means connected to the other end of the intake tube;
An informing means for informing a maintenance time when the energizing contact of the switch means is switched from the OFF state to the ON state,
The switch means is configured such that when the intake pressure of the blower acting through the intake tube is a normal reference pressure, the energization contact is maintained in an OFF state, and when the intake pressure is lower than the normal reference pressure, the energization contact is turned on. An abnormality detection device for a sewage purification device, wherein the abnormality detection device is configured to switch to a state.   The abnormality detection device for a sewage purification apparatus according to claim 3, wherein the normal reference pressure is a differential pressure between the intake pressure and the atmospheric pressure when the sewage purification apparatus is operating normally.   5. The sewage purification apparatus according to claim 3, wherein the notification unit is a notification lamp that lights or blinks when the energization contact of the switch unit is switched from an OFF state to an ON state. Anomaly detection device.

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