JPH0392114A - Central cleaner - Google Patents

Abstract

PURPOSE:To adjust suction force without dust blockage in a pipeline by rising airflow rate by the input set at the input setting unit while detecting the air pressure in a pipeline and maintaining the lowest airflow rate. CONSTITUTION:The output of the air pressure detecting unit 30 is accomplished AC-to-DC conversion, and a given voltage corresponding to this is selected by the voltage selecting unit 60 in the basic voltage generating unit 50, and it is set so as to maintain the lowest airflow rate as a function; the airflow rate control unit 70 always outputs a signal to maintain the lowest airflow rate. On the other hand, a user can set the arbitrary input at the input setting unit 10, thereby allowing to adjust the airflow rate by the input set at the input setting unit 10 while maintaining the lowest airflow rate, and adjust the suction force without dust blockage in a pipeline. Moreover, when the input is 'off', the operations of the AC-to-DC converting unit 40 and the voltage selecting unit 60 are stopped by the output signal of the 'off' discriminating unit 95, the output signal from the airflow rate control unit 70 is also stopped, and the fan motor 85 is made to a halt completely.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a central cleaner.

Conventional technology In general, the configuration and circuit configuration of a central cleaner is shown in Figure 4. It is as shown in Figure 6. That is, the main body 100 containing the fan motor 102, the control circuit 103, and the filter 101 for filtering the sucked dust is placed outdoors or under the stairs, and the suction port 104 side is connected to the hose insertion port 111 of each room, 112, 113 are combined with the piping 106, and these hose insertion ports 111, 112, 113 are connected together.
The hose unit 120 is connected to one of the hose units, and an extension pipe 131 is connected to the tip of the hose unit 120.
132 and a floor nozzle 140 connected to the tips of these extension tubes 131, 132.

Conductive wires from the hose ports 111 , 112 , 113 are connected in parallel to a control circuit 103 inside the main body 100 .

Additionally, the exhaust port 105 is installed so that the exhaust can be exhausted outdoors or under the floor of the house.

When the user turns on the hand switch 121 of the hose unit 120, the control circuit 103 drives the filter motor 102 to pass through the floor nozzle 14o1 extension pipes 132, 131, the hose unit 12o1 hose insertion port 112, and the piping 105. Cleaning is performed by suctioning dust from the intake port 104. A piano wire buried in the hose 122 is used as a signal line for transmitting that the hand switch 121 is turned on to maintain its shape.

By the way, in recent years, due to significant changes in the living environment, there has been a strong demand for carpet cleaning.
The suction power of 02 is getting stronger. On the other hand, when cleaning curtains, floors, tatami mats, etc., which are easier to clean if the suction power is small, use the drain hole 1 in a part of the hose unit 120.
23 is provided, and this drain hole 1230 throttle 9 condition is throttled valve 1
24 to appropriately adjust the air volume to reduce the suction force and ensure cleaning performance.

Problems to be Solved by the Invention However, with such a conventional configuration, wind noise from the throttle valve 124 increases noise, making it difficult to maintain the quietness that is one of the characteristics of a central cleaner. It becomes difficult. Furthermore, the main body 100 and hose insertion ports 111 and 112
, 113, the pressure loss of the piping 105 varies depending on the distance, and the pressure loss also varies depending on the length of the hose.
The throttle valve 124 of the hose unit 12o is not able to sufficiently throttle the hose, making it difficult to clean floors, folds, etc., resulting in problems with noise and cleaning performance.

An object of the present invention is to provide a central cleaner that solves the above-mentioned conventional problems.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the central cleaner of the present invention includes an input setting section for setting the input of the fan motor, and an input for receiving the output signal of the input setting section and converting it into a conduction angle. a control section, a wind pressure detection section that detects the wind pressure in the pipe and outputs an analog signal proportional to the wind pressure, a ▲/D conversion section that converts the analog signal of the wind pressure detection section into a digital signal, and a plurality of fan motors. A voltage selection unit that selects and outputs any one voltage of the reference voltage generation unit according to a combination of a reference voltage generation unit that generates a plurality of input reference voltages and a digital signal from the ▲/D conversion unit. an air volume control part that receives the output of the voltage selection part and converts it into a conduction angle; a fan motor drive part that drives a fan motor based on the outputs of the input control part and the air volume control part; and a fan motor drive part that provides an input "off" signal. An "off" generation section, an "off" discrimination section that compares the output signals of the "off" generation section and the input setting section, and a voltage selection section based on the output signal of the "off" discrimination section. It consists of a ``off'' command section that stops the operation of the section.

Effect According to the above configuration, the output of the wind pressure detection section is converted to ▲/D,
An arbitrary voltage corresponding to this is selected from the reference voltage generation section by the voltage selection section, but since they are set to ensure the minimum air volume as a function of the wind pressure, the air volume control section always selects the minimum A signal is output to ensure the air volume. On the other hand, since the user can set any input in the input setting section, it is possible to adjust the air volume according to the input set in the input setting section while ensuring the minimum air volume. Power can be adjusted. Furthermore, when the input is "off", the operation of the ▲/D conversion section and the voltage selection section is stopped according to the output signal of the "off" discrimination section.
The output signal from the air volume control section is also stopped, making it possible to completely stop the fan motor.

Example The embodiment will be explained below based on FIGS. 1 to 3.

In Fig. 1, 1o is an input setting part for setting the suction force, and in this embodiment, a variable resistor 11 is used so that when the suction force is set weakly, the resistance becomes high, and conversely, when the suction force is set strong, the resistance becomes low. There is. Reference numeral 20 denotes an input control unit that converts the conduction angle into a conduction angle according to the resistance value of the input setting unit 10. In this embodiment, a phase control exclusive IC 21 is used to set the conduction angle to a small conduction angle when the resistance is high, and to set the conduction angle to a large conduction angle when the resistance is low. It is set to convert to a corner.

Reference numeral 30 denotes a wind pressure detection unit that detects the wind pressure inside the pipe, and in this embodiment, a pressure sensor 31 is used to amplify the signal with a button and operational amplifiers 31 and 32. 4o is a ▲/D conversion unit that converts the output voltage (analog signal) of the wind pressure detection unit 30 into a digital signal, and in this embodiment, the ▲/D conversion dedicated I
C41 is used.

For example, if the output voltage of the ▲/D converter 40 is made to correspond to "ooo" when the output voltage of the wind pressure detection section 30 is Ov, and it is made to correspond to "111" when the output voltage is 6V, then the output voltage is 2V. The output voltage becomes "011". In accordance with this combination of signals, the voltage selection section SO selects any one voltage based on the above combination from among the plurality of reference voltage generation sections 50 that provide a plurality of inputs to the fan motor 86. A multiplexer 61 is used. for example,"
If ``ooo'' corresponds to v1 and H 111tj corresponds to v8, when ?9 o 11'' is input, v3 is selected, and the output voltage of this voltage selection section 60 is V. . 7o is an air volume control section that converts the output of the voltage selection section 6o into a conduction angle, and the input control section 2
By using the same IC 71 as the phase control exclusive IC 21 used in step 3, the conduction angle is set to be converted to a small conduction angle when the voltage is high and to a large conduction angle when the voltage is low. 80 is a fan motor drive section that drives the fan motor 86 based on the output signals of the input control section 20 and the air volume control section To. That is, if the output diode 81 of the input control section 20 is turned on, the fan motor 86 operates, and even if the output diode 82 of the air volume control section 7o is turned on, the fan motor 86 operates.

1, 90 is an "off" generating section that provides a stop voltage for the fan motor 86; 95 is the input setting section 1o and the "off" generating section 9;
By comparing the respective outputs of o, the input setting unit 1o
In this embodiment, a comparison M98 is used as the "off" determination section that determines whether the "off" state is "off" or not. Reference numeral 99 denotes an "off" command section that stops the operations of the ▲/D converter 40 and the voltage selection section 6o in response to the output signal of the "off" determining section 96.

If the setting of the input setting section 10 is "off", the output voltage is small, and a positive voltage is output from the "off" determination section 96 (comparator 96). This signal is ▲/D converter 4o
Since the voltage is input to the voltage selection section 6o and each operation is stopped, the air volume control section 00 is also stopped. In addition, the input control section 2
fan motor 86 has also stopped operating at the same time.
has stopped. Conversely, if the input setting section 10 is set to "off"
Otherwise, the fan motor 85 is driven because the ▲/D converter 40, the voltage selector 60, the air volume controller 70, and the input controller 20 each operate i.

Next, the air volume control method using the wind pressure detection section 3Q, the ▲/D conversion section 40, the reference voltage generation section 60, and the voltage selection section 6o will be explained in some detail.

Referring to FIG. 2, if we consider the case where cleaning is performed using the input 3 curve, it is assumed that the pressure in the pipe is low (dust is not dispersed) and is at point ▲.

However, when dust and dust come in, the operating point moves toward the upper left of the diagram and finally reaches point B. Then, there it is! Then P
Since the wind pressure that was only 3 or less becomes a, the value of the ▲/D converter 40 changes by ``001''. For example, if the value at five points is "011", the value at point B is "010".Then, the voltage selection section 8
0, the output is changed from the reference voltage v6 corresponding to P2 to the reference voltage v5 corresponding to P3, and the output voltage decreases, the conduction angle from the air volume control section To is wide, and the rotation of the fan motor 85 is It rises to the curve from input 3 to input 4 (
(from point B to point C), the operating point moves. By repeating such an operation at P, ~ p8-1, even if dust 1b is generated when cleaning is performed with a weak suction force, the suction force can be increased. A substantially constant air volume can be ensured, and by setting this air volume to a level that does not cause dust build-up, it is possible to ensure the minimum air volume.

Now, if we consider that the signal set by the input setting part 10 is superimposed on the signal output from the input control part 20, while the signal that always keeps the air volume constant is output to the fan motor drive part 80. It will look like this:

First, when the input setting section 10 is not "off", the "off" command section 97 outputs Ov, and the ▲/D conversion section 40 and the voltage selection section 60 are in the operating state. (Fan motor 850
N period) Here, when there is no dust, if the input setting section 10 sets an arbitrary suction force, the input control section 20 outputs T.
, the output signal is output at a short time t from time t0 when the power supply voltage becomes oV. Then, the diode 81 turns on and drives the fan motor 86. As a result, the υ air volume increases, the wind pressure decreases, the voltage detected by the wind pressure detection section 30 increases, the output signal of the ▲/D conversion section 40 increases, and the output voltage from the voltage selection section 6o also increases. Therefore, the conduction angle becomes smaller and the diode 82 is turned on at time t2, but since the fan motor 86 is already driven, t
The output at 2 is invalid. That is, if there is no dust, the signal from the air volume control section 70 is invalid υ, and the input setting section 10
The fan motor 86 operates with the input set in .

However, when the dust gradually increases and the wind pressure increases due to the weak suction force, the output of the wind pressure detection section 30 decreases, and the output signal from the air volume control section 70 is output at a short time t2 from t0. will be done. (Period T2) On the other hand, even if a weak suction force is set in the input setting section 1o, it becomes invalid because the signal from the input control section 20 is output at time t, which is later than t2. That is, when dust particles are generated, it is possible to ensure the minimum air volume even if a weak suction force is set by the input setting section 10.

Next, when the input setting section 10 is "off", a positive voltage is output from the "off" command section 97, and the ▲/D conversion section 40 and the voltage selection section 60 are in a stopped state. Therefore, the output from the air volume control section 70 is also stopped, and the input control section 20 is also stopped, so the fan motor 86 is stopped! cormorant.

(Fan motor 8607F period) Depending on the settings in the input setting unit 10, the fan motor 86 can be stopped and the minimum air volume can be ensured to allow cleaning at any air volume.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the minimum air volume can be ensured by detecting the wind pressure inside the piping, and the air volume can be increased by the input set in the input setting section. Also, since the fan motor can be stopped reliably, the strength of the suction force can be easily adjusted even in the central cleaner, and no dust is generated in the piping, and there are no noise problems because there are no 9 restrictor valves. Allows for comfortable cleaning.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a wind pressure-air volume characteristic curve diagram of FIG. 1, and FIG. 3 is a waveform diagram of the main parts of FIG. 1.
FIG. 4 is a configuration diagram of a conventional example, and FIG. 6 is a circuit diagram of FIG. 4. 1o...Input setting section, 20...Input control section, 30...Wind pressure detection section, 40...
▲/D conversion section, 60...Reference voltage generation section, 60
...Voltage selection section, 70... Air volume control section, 8o... Fan motor drive section, 86...
...Fan motor, 90... "Cut" generating part, 9
5... "Cut" discrimination section, 99... "Cut"
Command department.

Claims (1)

[Claims] An input setting section that sets the input of the fan motor, an input control section that receives the output signal of the input setting section and converts it into a conduction angle, and a wind pressure detection section that detects the wind pressure in the piping and outputs an analog signal proportional to the wind pressure. an A/D converter that converts an analog signal of the wind pressure sensor into a digital signal; a reference voltage generator that generates a plurality of reference voltages that provide a plurality of inputs to the fan motor; a voltage selection section that selects and outputs any one voltage of the reference voltage generation section according to a combination of digital signals; an air volume control section that receives the output of the voltage selection section and converts it into a conduction angle; A fan motor drive unit that drives the fan motor based on the outputs of the control unit and the air volume control unit, an “off” generation unit that provides an input “off” signal, and the output signals of the “off” generation unit and the input setting unit are compared. A central cleaner comprising an "off" discrimination section and an "off" command section that stops the operation of an A/D conversion section and a voltage selection section based on an output signal of the "off" discrimination section.