JP4566931B2 - Sewage septic tank air pump and sewage septic tank connected to the sewage septic tank air pump - Google Patents

Description

  The present invention relates to a sewage septic tank air pump for sending air to a sewage septic tank, and a sewage septic tank to which the sewage septic tank air pump is connected.

FIG. 7 is a schematic perspective view showing a conventional sewage septic tank. The sewage flows into the sewage septic tank 2 from the inflow pipe 1 and is discharged from the outflow pipe 3 after being treated with microorganisms or the like.
The sewage septic tank 2 includes an air pump 4, and air that promotes decomposition of filth by microorganisms is supplied from the air pump to an aerobic filter bed tank installed in the sewage septic tank 2.
The aerobic filter bed tank is filled with a carrier to which aerobic microorganisms adhere, and sewage is filtered by this carrier. The carrier A that mainly performs aerobic treatment and the carrier B that mainly performs filtration are arranged such that the carrier A is an upper stage and the carrier B is a lower stage. By discharging air from between B and B, air is sent to the carrier A and aerobic microorganisms are activated. Since the carrier B is not agitated by air, the carrier B can be kept stationary and filtered.
However, since the carrier B is gradually clogged by continuous use, it is necessary to periodically feed air to eliminate clogging (hereinafter referred to as “back washing”).
Therefore, the air pump 4 has two pipes, one is an aeration pipe 5 and the other is a backwash pipe 6.

The air pump 4 feeds air to the aeration pipe 5 and / or the backwash pipe 6, and this switching is generally performed using an electromagnetic valve as disclosed in Patent Document 1.
Japanese Patent Laid-Open No. 10-238473

The sewage septic tank that requires connection of two air pipes for aeration and backwashing has the number of backwashing times of about 1 to 3 per day in order to maximize the water purification performance of each septic tank.
Therefore, for those who manufacture and sell multiple types of sewage septic tanks with different numbers of backwashes per day, it is necessary to have multiple types of stocks of air pump bodies and maintenance air pumps with different numbers of backwashes for each sewage septic tank. However, standardization of blowers cannot be achieved, and for the blower production side, varieties cannot be integrated, and it is difficult to improve productivity.

  The present invention provides a sewage septic tank air pump that enables standardization of blowers and integration of varieties, and a sewage septic tank equipped with the sewage septic tank air pump.

(1) The present invention is a flow for switching the flow path to one of two outlets for connecting a pipe for aeration and backwashing provided in a casing with a pump for pumping air and discharging air from the pump. An air pump for a sewage septic tank comprising a path switching device and a control device that operates the flow path switching device at a predetermined time, wherein the control device switches the number of times the channel is switched from aeration to backwashing (reverse An air pump for a sewage septic tank that has a selection means for selecting and storing the number of washings and a selection switch for designating the number of times of switching the flow path, and the effective period of the selection switch is limited within a predetermined time from the power-on of the air pump. is there.
(2) The air pump for a sewage septic tank according to item (1), wherein the selection means uses a nonvolatile memory as the storage means.
(3) A sewage septic tank to which the air pump for a sewage septic tank described in item (1) or (2) is connected.

According to the present invention, by providing selection means for selecting and storing the number of times of switching the flow path from aeration to backwashing (number of backwashing times), standardization of air pumps and product type integration can be realized.
Moreover, since the air pump of this invention has provided the effective period in the selection switch, there is no fear that the frequency | count of backwashing may be changed accidentally.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1A and 1B show an embodiment of an air pump according to the present invention, in which FIG. 1A is an external perspective view, and FIG. The air pump 4 with the flow path switching device receives the discharge air from the pump drive unit 7, the subsequent air tank 8, and the pump drive unit, and passes it to one flow path (discharge port A, discharge port B). The flow path switching device 9 and the control device 10 to be supplied to are integrated components housed in the casing 11.

The control device 10 controls the flow path switching device in order to aerate or backwash the aerobic filter bed tank in the septic tank. The control device 10 can set the backwash start time and backwash end time simply by operating the operation section of the device, and operates the flow path switching device according to the set time and automatically performs the backwash operation. Is the main function.
Moreover, the control apparatus 10 has a selection switch, and can select the frequency | count of switching of a flow path.

  FIG. 2 is a control block diagram of the air pump shown in FIG. Centering on the control means, there are setting means, selection means, and drive means, and the flow path switching device is driven by the drive means. The control means uses a small microcomputer (hereinafter referred to as “CPU”), switches the setting means, outputs the display data to the setting means, and changes and sets the number of backwash times with the setting means. Save / read values. In order to store the backwash frequency data in the selection means, it is preferable to use an EEPROM with a built-in serial communication function that can be easily connected to the CPU. The backwash count setting value according to the present invention is determined based on the data stored in the EEPROM.

  3 shows the display device of the air pump shown in FIG. 1, (a) shows the full display lighting state, and (b) shows an example of the automatic operation display state. The display 12 uses a liquid crystal display, and as display information, there are four 7SEGs for displaying the current time and the backwash setting time, “automatic” for displaying the automatic operation state, and the manual backwash state. “Manual” for displaying, “ON” lit when setting the backwash start time, “OFF” lit when setting the backwash end time, “1”, “2” for displaying the backwash number to be set, “3”, “time adjustment” that is turned on when the current time is set.

The switches include “hour” and “minute” time setting switches operated when setting the time / backwash time, “setting” mode setting switch 14 for changing each setting mode, and “manual” for manually performing the backwashing. A manual backwash switch 15 is provided.
The display device is normally in an automatic operation state, and the display device 12 is in a state where the current time and “automatic” shown in FIG.

  Next, various setting modes will be described. The setting mode can be changed each time the mode setting switch 14 is pressed. The basic mode transition is a series of modes of "automatic operation mode"-"current time setting mode"-"backwash start time setting mode"-"backwash end time setting mode"-"automatic operation mode". Make a transition. Normally, in the “automatic operation mode”, the current time (for example, 13:25) is displayed as shown in FIG.

FIG. 5 shows a setting mode flow. (A) shows the setting mode flow when the number of backwashing is one time, (b) shows the case where the number of backwashing times is two, and (c) shows the setting mode flow when the number of backwashing times is three. Show. In the case of an air pump that requires two times of backwashing, the “backwash start time setting mode”-“backwash end time setting mode” portion shown in FIG. "-" Backwash 1 end time setting mode "-" Backwash 2 start time setting mode "-" Backwash 2 end time setting mode ". When the number of backwashing is 3, a start / end time setting mode corresponding to backwashing 3 is further added.
Since the air pump can change and store the number of backwashing times, it is not necessary to prepare a different air pump for each number of backwashing times.

  A method for actually setting the number of backwash operations will be described. In the operation of setting the number of backwashes, a dedicated switch for setting the number of times of backwashing would be easy to understand for operation, but this operation should be performed at the beginning of use of the air pump (or before shipment). Since it only needs to be set once, it is preferable to use the originally existing means such as a time setting switch so as not to increase the cost.

FIG. 4 shows the setting of the number of backwashing, wherein (a) shows the number of backwashing times 1 and (b) shows the number of backwashing times 3 times.
To set the number of backwashes, first turn off the air pump and then turn on the air pump again (specifically, plug the air pump power plug into a commercial power outlet). By pressing both the “hour” and “minute” switches at the same time within a predetermined time (set to 10 seconds in this embodiment) after turning on the power, the number of backwash operations as shown in FIG. The mode changes to the setting mode, and the preset backwash count is displayed. “H−” is a display for notifying that the mode is the change mode, and “1” is a display indicating that the preset number of backwashing is set once. Here, by pressing both the “hour” and “minute” switches again, the operation mode returns to the automatic operation mode shown in FIG. 3B. To change the number of backwashes, press the “setting” switch. You can change the settings. The number of times can be changed in the order of 1 time-2 times-3 times-1 time.

The predetermined time described in the present invention can be arbitrarily set, and is preferably within 3 minutes, more preferably within 5 to 60 seconds, in order to prevent erroneous operation. Since the number of backwashing greatly affects water quality, it is necessary to consider a range in which unexpected changes are not made due to erroneous operations.
Also, the transition condition can be set to simultaneously press multiple switches by pressing both “hour” and “minute” (and also by setting the pressing time to 2 seconds or more, for example) to prevent erroneous changes. The effect goes up.
The changed backwash count is stored in the nonvolatile storage device EEPROM, so that data loss can be prevented against a CPU reset caused by a CPU runaway. The program in the CPU is programmed in advance so as to operate in the setting mode flow corresponding to the number of times as shown in FIGS. 5A to 5C based on the backwash frequency data stored in the EEPROM. Just leave it.

  FIG. 6 shows a connection diagram between the CPU and the EEPROM. The EEPROM generally has a built-in synchronous serial communication function, can be connected to the CPU via three lines, and can easily transmit and receive data. The communication timing is performed by a synchronization clock from the CLK terminal from the CPU. Write data from the CPU to the EEPROM is serially output from the TX terminal and sent to the DI terminal of the EEPROM. Conversely, read data from the EEPROM to the CPU is sent from the DO terminal of the EEPROM to the RX terminal of the CPU.

FIG. 8 is a schematic sectional view showing one embodiment of the sewage septic tank of the present invention.
The inside of the sewage purification tank 16 is divided into an anaerobic filter bed tank first chamber 17, an anaerobic filter bed tank second chamber 18, an aerobic filter bed tank 19, a treated water tank 20, and a disinfection tank 21 from the upstream side. The sewage flowing in from the inflow pipe 1 is purified by sequentially flowing down the tanks described above as indicated by arrows, and discharged from the outflow pipe 3 to the outside of the system.

  In the aerobic filter bed tank 19 described above, an upper filter bed 22 and a lower filter bed 23 are installed on the upper and lower sides. The upper filter bed 22 is subjected to an aerobic treatment, and the lower filter bed 23 is generated as a result of the aerobic treatment. Filter the solid. In the upper stage filter bed 22, in order to perform an aerobic treatment, an air diffuser 24 is attached below the upper filter bed 22 to discharge air. A backwashing air diffuser 25 is provided below the lower filter bed 23.

The discharge ports A and B of the air pump shown in FIG. 1 are connected to an air pipe, and one of the air pipes is connected to an air diffuser 24 that performs aeration, and the other is connected to an air pipe 25 for backwashing. ing.
If the operation of the sewage septic tank configured as described above is continued, in the lower filter bed 23, the solid matter generated as a result of the aerobic treatment is filtered, and thus the filter bed itself is blocked. Therefore, the backwashing is performed by switching the flow path from the air pump so that air is periodically discharged from the backwashing air diffuser pipe 25 provided below the lower filter bed 23. The administrator of the sewage septic tank 16 causes the control device to discharge air from the backwashing air diffuser 25 at a predetermined time interval for a predetermined time, and to perform aerobic treatment from the air diffuser 24 during other times. Set to discharge.

1 shows an embodiment of the present invention, in which (a) is an external perspective view of a diaphragm type air pump, and (b) is an internal configuration diagram. It is a control block diagram of the air pump shown in FIG. 1 shows the display device of the air pump shown in FIG. 1, (a) shows the full display lighting state, and (b) shows an example of the automatic operation display state. The setting of the number of backwashing of this invention is shown, (a) shows the number of backwashing once, (b) shows the number of backwashing 3 times. It is a setting mode flowchart which shows one Example of this invention. FIG. 2 is a connection diagram between a CPU and an EEPROM according to an embodiment of the present invention. It is a connection example of a sewage septic tank and an air pump, showing a conventional example. It is a schematic sectional drawing of the sewage septic tank which is one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Inflow pipe, 2 ... Sewage septic tank, 3 ... Outflow pipe, 4 ... Air pump, 5 ... Aeration pipe, 6 ... Backwash pipe, 7 ... Pump drive part, 8 ... Air tank, 9 ... Channel switching device, 10 ... Control device, 11 ... casing, 12 ... indicator, 13 ... time setting switch, 14 ... mode setting switch, 15 ... manual backwash switch, 16 ... sewage septic tank, 17 ... first anaerobic filter bed tank, 18 ... anaerobic filter 2nd floor tank, 19 ... aerobic filter bed tank, 20 ... treated water tank, 21 ... disinfection tank, 22 ... upper filter bed, 23 ... lower filter bed, 24 ... diffusing section, 25 ... diffusing pipe for backwashing.

Claims (3)

  A pump for pumping air, a flow path switching device for switching the flow path of the discharge air from the pump to one of two discharge ports for pipe connection of aeration and backwashing provided in the casing, and this flow An air pump for a sewage septic tank equipped with a control device that operates the path switching device at a predetermined time, wherein the control device selects and stores the number of times of switching the channel from aeration to backwashing (number of backwashing) An air pump for a sewage septic tank that has a selection means for selecting and a selection switch for designating the number of times of switching the flow path, and the effective period of the selection switch is limited within a predetermined time from the power-on of the air pump.   2. The air pump for a sewage septic tank according to claim 1, wherein the selection means uses a nonvolatile memory as the storage means. A sewage septic tank to which the air pump for a sewage septic tank according to claim 1 or 2 is connected.

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