JPS61280819A - Central cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Industrial Application Field The present invention relates to a central cleaner having a plurality of hose outlets, each of which is connected to a vacuum cleaner body through piping.

(Example) Conventional technology A conventional central cleaner is, for example,
As in Publication No. 855, the pressure signal in the piping is input to a central processing unit and processed, and a valve installed in the piping is controlled to keep the suction force constant, or JP-A-59-149
As disclosed in Japanese Patent No. 116, a pressure sensor is provided at the hose insertion port and the suction port of the vacuum cleaner, and the input to the electric blower of the vacuum cleaner body is controlled based on the difference in output signals to maintain a constant suction force.

In addition to the effects mentioned above, detecting the required pressure with a pressure sensor also has the following effects: - To prevent the electric blower from overheating, the blower will stop energizing if it is operated for more than a certain amount of dust at a certain amount of collected dust. It has advantages in controlling the main unit, such as keeping the suction force constant regardless of the distance between the vacuum cleaner main body and the suction port, as well as accurate calculation of the amount of collected dust, detection of dirt clogging in the middle of piping, or electric blower. There are advantages such as detection of failures such as

A small, lightweight, and inexpensive semiconductor pressure sensor is generally used to detect this pressure, and the output signal of this sensor is amplified and used as No. 16 for control or calculation purposes.

For this reason, the output signal fluctuates greatly due to variations in the sensor itself or the components of the amplifier circuit, temperature changes, and aging, and in order to keep this within a practical range, a complicated and expensive correction circuit was required.

Furthermore, for central cleaners that can manually control the input of the electric blower, if the input of the electric blower is changed, the state of the central cleaner system cannot be determined simply by the sensor value during operation or the difference between the sensor value before and during operation. I couldn't figure it out.

C) Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks and uses a simple configuration to detect accurate sensor output signals even when electric blower input changes, and to perform accurate decision control. It provides a cleaner.

2) Means for Solving the Problems The present invention inputs signals from pressure sensors provided at each suction port (hose insertion port) or before and after the filter of the vacuum cleaner body, and a control signal for input control of the electric blower. The pressure sensor output values are input to the central processing unit through the output port section, and the output values of each pressure sensor when the electric blower is stopped are stored in a storage device as initial values.

E) Operation The output value of each pressure sensor when the electric blower is stopped is a value that includes variations in the sensor itself and the components of the amplifier circuit, temperature changes, aging changes, etc. This value and the value during operation are almost the same due to variations in parts, temperature changes, aging, etc., and the difference between the value when the vacuum cleaner is running and the value when it is stopped is the pure value that removes these fluctuation factors. Sensor No. 2 is activated when the vacuum cleaner is operated, and this signal enables accurate control.

Therefore, the input control signal of the electric blower makes it possible to accurately grasp the state in any input state.

f) Example The present invention will be described below with reference to embodiments shown in the drawings.

In FIG. 1, (1) is a structure, such as a house, in which the central cleaner according to the present invention is installed, and the vacuum cleaner body (2) installed under the floor of the house is equipped with a dust filter, an electric blower, etc., and has piping. (3) connects to a plurality of hose outlets (4) (4), . . . provided in the room. (5
)(5)... is each hose insertion port (4)<4)...
・A circuit section installed near the hose inlet (4), including the pressure detection section of the hose insertion port (4), the signal detection section of the hose hand switch section (6), and the display section such as an LED, and input/output via the signal line (7). It is connected to a central processing unit (9) via a port section (8). The central processing unit (9) has a storage device (1
0), allowing data input and output. The input/output port section (8) is connected to the vacuum cleaner body (pressure detection section 11 before and after the two dust collecting filters) and the vacuum cleaner control circuit (
12) is connected to IIF, and the central processing unit (9)
The electric blower is controlled by the output signal.

The configuration of the hose inlet 4) is shown in Figure 2, in which a front panel (14) having a hose holder (13) that can be connected to the pipe (3) is attached to the floor or wall 15). Secure with screws, etc. The piping of the hose holding part (13)
3) Attach the rubber gasket (16) to the side with the metal fitting (17)
and press fit into the pipe (3). The circuit section (5) is attached to a board (18), and this board is fixed to the back side of the front panel (14) with screws or the like via a mounting bracket (19), and is also mounted on the board (18). The pressure sensor (20) is connected to a pressure transmitting vibrator (21) that passes through a hole made in the rubber gasket (16) and the metal fitting (17).
) to detect the pressure inside the pipe near the hose insertion port (4).

(22) is a hose insertion part, which is used by manually opening the opening/closing lid (23) of the hose insertion port (4) and inserting it into the hose holding part (13). At this time, a variable resistor built into the hand switch section (6) of the flexible hose (24) and connected to the two steel wires of the flexible hose (24) is also connected to the flexible hose (24).
A pair of terminal pins (25>(25>) connected to the two steel wires of 4) and located in the hose insertion part (13) and a pair of terminals (26) ( located in the hose insertion part (13)) 26), and a value corresponding to the resistance value of the variable resistor is read into the central processing unit (9) through the signal lines (27) and (7). When inserted into the receptacle (13), the flexible hose (24) is locked and fixed by the stopper (28).To remove 9, press the operation button (29) to push down the stopper (28) and release the flexible hose (24). When the flexible hose (24) is removed, the opening/closing lid (23) of the hose outlet 4) is brought into close contact with the front panel (14) by the spring (30) provided on the pivot portion. The flexible hose 24) is further equipped with a pipe (31) and a floor suction device (32) for cleaning.

By changing the resistance value of the variable resistor built into the hand switch section (6) of the flexible hose (24), the central processing unit 9) reads and calculates the change through the input/output port section (8). and input the required output to the input/output port section (8
) to the vacuum cleaner control circuit (12) to adjust the electric blower input.

In the above configuration, the output signal of the pressure sensor 20) varies by S' even in the same pressure state as shown in FIG. 3 due to variations in parts, temperature changes, aging, etc. However, if 0 and full scale are adjusted under certain conditions, ∆S/∆H is almost constant. Therefore, the pressure sensor value immediately before the vacuum cleaner operation is stored in the storage device (10) as an initial value, and the pressure sensor value is stored as an initial value during operation. By using the difference between the pressure sensor value and the pressure sensor value for each process, such as calculating the amount of collected dust or detecting dirt clogging in the middle of piping, it is possible to easily determine accurate pressure changes without installing a complicated correction circuit. This makes it possible to control the vacuum cleaner.

The pressure sensor output value when the electric blower input is changed by operating the hand switch section (6) is as shown in Figure 4, and the pressure sensor output change value is subjected to appropriate arithmetic processing using the blower control output value. By doing this, it is possible to easily and accurately know the pressure change without installing a complicated correction circuit.Therefore, it is also possible to calculate the amount of dust collected, detect abnormalities, etc. accurately and easily, and to control the vacuum cleaner accurately. becomes possible. The flow of the operation of the central cleaner is shown in the flowchart of FIG.

g) Effects of the Invention The central cleaner according to the present invention stores the pressure sensor value immediately before the vacuum cleaner operation, that is, the atmospheric pressure state, as an initial value in the storage device, and calculates the appropriate value based on the difference between the pressure sensor value during operation and the blower input. By performing accurate calculations, we can grasp the accurate system status under all blower input conditions.
Accurate vacuum cleaner control becomes possible.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram of the central cleaner according to the present invention, Fig. 2 is a sectional view of the main part of the hose insertion port, Fig. 3 is a fluctuation diagram showing the relationship between pressure sensor output signal and degree of vacuum, and Fig. 4 is a diagram showing the relationship between the pressure sensor output signal and the degree of vacuum.
The figure is a characteristic diagram showing the change in the hose outlet pressure sensor output signal with respect to the amount of collected dust when the blower input is changed, and FIG. 5 is a flowchart showing the flow of the operating state of the central cleaner. (2)... Vacuum cleaner body, (3)... Piping, (4)...
... Hose insertion port, (8) ... Input/output port section, (9
)...Central processing unit, ri10)...Storage device,
(20)...Pressure sensor ・

Claims (1)

[Claims] 1) It has multiple hose outlets, each hose outlet is connected to the vacuum cleaner body with a built-in dust collection filter and electric blower by piping, and a pressure sensor is installed before and after each hose outlet or the filter. and inputs the signal of the pressure sensor and the control signal for input control of the electric blower to the central processing unit through the input/output port section to control the vacuum cleaner main body, the control signal for controlling the input of the electric blower A central cleaner characterized in that each pressure sensor output value at the time of stop is stored in a storage device as an initial value.