JP2005172404A - Normally ventilating equipment controlling switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a normally ventilating equipment controlling switch, switching the gas quantity at two or more portions. <P>SOLUTION: This controlling switch includes: a push button switch SW1 for outputting an operation signal only while an operating part is pushed; a pair of extension terminals where an external extension switch and a power supply are serially connected between both ends; a detection circuit part for generating a detection signal when an electric current flows between both extension terminals; and a control IC 100 for operating a ventilating fan in a desired control state on the basis of an operation signal from the push button switch SW1 and a detection signal from a detection circuit part. The control IC 100 switches the gas quantity of the ventilating fan to alternations of strong state and weak state every time an operation signal having shorter time duration than a predetermined time is input from the push button switch SW1, stops the ventilating fan when an operating signal having longer time duration than the predetermined time is input, operates the ventilation fan in a weak wind mode when an operating signal having shorter time duration than predetermined time is input during the stop of the ventilating fan, and operates the ventilating fan in a strong wind mode regardless of the operating signal of the push button switch SW while a detection signal is input from the detection circuit part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a control switch for a constantly ventilated facility that performs ventilation for 24 hours by constantly operating a ventilator used for ventilation of a bathroom or a toilet with a minute air volume.

  Conventionally, a ventilating fan control switch for controlling on / off of a ventilating fan installed in a bathroom or a toilet has been provided (see, for example, Patent Document 1).

By the way, as a measure against sick house syndrome, in order to keep the concentration of formaldehyde in a room below a predetermined guideline value, in recent years, the building standard law has obliged to install a constant ventilation system that constantly ventilates indoor air. However, as a continuous ventilation facility that ventilates with a small air volume for 24 hours, for example, a ventilation fan installed in the toilet is used, and the ventilation fan is weakened to operate constantly, and during the use of the toilet and for a certain period after use A switch for controlling a ventilation fan that operates with a strong air flow is also provided.
JP 2001-126599 A

  In the above-mentioned switch for controlling the ventilation fan, an operation to turn on and off the ventilation fan with a switch installed at one place and an operation to switch the strength of the air volume are performed. There was a problem that there was nothing that could be used to switch the air volume, and it was not easy to use.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a constantly ventilating equipment control switch capable of switching the air flow from a plurality of locations.

  In order to achieve the above-mentioned object, the invention of claim 1 has a function of switching the air volume between two levels of strength and weakness, and normally ventilating equipment for constantly ventilating indoor air and switching the air volume. A switch for equipment control that detects the on / off state of the operation switch that outputs an operation signal only when the operation unit is pressed and the external extension switch. And a control unit that constantly operates the ventilation equipment in a desired control state based on the operation signal from the operation switch unit and the detection signal from the detection circuit unit, and the control unit includes an operation switch Each time an operation signal with a time width shorter than a predetermined time is input from the section, the air volume of the constant ventilation equipment is reversed to strong or weak, and when an operation signal with a time width of a predetermined time or more is input, the constant ventilation equipment When an operation signal with a duration shorter than the predetermined time is input while the ventilation system is stopped, the ventilation system is operated with a low air flow, and a detection signal is input from the detection circuit unit. During this time, the air volume of the ventilation equipment is always switched strongly regardless of the operation signal from the operation switch section.

  According to a second aspect of the present invention, in the first aspect of the present invention, a series circuit of an extension switch and a power source is connected between the pair of extension terminals, and the detection circuit unit detects the presence of current flowing between the pair of extension terminals. Current limiting means for setting the current flowing between the pair of extension terminals to 10 mA or more and 20 mA or less when the extension switch is turned on.

  According to a third aspect of the present invention, in the first aspect of the invention, the control unit is based on a first control operation block that determines a control state based on an operation signal from the operation switch unit, and a detection signal from the detection circuit unit. And a second control calculation block for determining the control state, and the first control calculation block always has an air flow rate of the ventilation facility every time an operation signal whose time width is shorter than a predetermined time is input from the operation switch unit. Are alternately switched between strong and weak, and when an operation signal with a time width of a predetermined time or more is input, the continuous ventilation equipment is stopped, and the time width is shorter than the predetermined time with the continuous ventilation equipment stopped. When the operation signal is input, the control state is determined so that the ventilation system is always operated in a low wind, and the second control calculation block always operates the ventilation system in a strong wind while the detection signal is input from the detection circuit unit. If the control state is determined and the strong wind operation is determined in the second control calculation block, the ventilation fan is operated with a strong air flow, and if it is determined in the second control calculation block other than the strong wind operation, A ventilating fan is operated in the control state determined by the first control calculation block, and an indicator lamp for displaying the control state determined by the first control calculation block is provided.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, there is provided time-limit means for limiting a predetermined delay operation time from the point in time when the detection signal input from the detection circuit unit is stopped. It is characterized in that the control state is determined so that the air volume of the ventilation equipment is always increased after the stop until the time limit operation of the time limit means ends.

  The invention of claim 5 is characterized in that, in the invention of claim 4, selection means is provided for selecting whether to enable or disable the timer control by the time limit means.

  According to a sixth aspect of the present invention, in the fourth aspect of the present invention, there is provided time setting means for selectively selecting the delay operation time from a plurality of set values.

  As described above, according to the invention of claim 1, it is possible to perform an operation for always turning on / off the ventilation equipment in accordance with a pressing operation of one operation unit and a switching operation for switching the air volume between strong and weak, Furthermore, since the air volume of the ventilation equipment is constantly switched based on the detection signal from the detection circuit section and the operation signal from the operation switch section, an operation to switch the air volume strongly using an external extension switch can be performed. The air volume switching operation can be performed at a place, and the convenience is improved.

  According to the second aspect of the present invention, since the current flowing between the pair of extension terminals when the external extension switch is turned on is set to 10 mA or more and 20 mA or less by the current limiting means, an off-the-shelf low capacity type pilot lamp is provided. The switch can be used as an extension switch. When the extension switch is turned on, the pilot lamp built in the extension switch is lit. When the extension switch is turned off, the pilot lamp is turned off. Can be easily identified, improving usability.

  According to the invention of claim 3, the first control calculation block determines the control state of the ventilation equipment based on the operation signal from the operation switch unit, and the second control calculation block detects the detection signal from the detection circuit unit. The control unit determines the control state of the constantly ventilated equipment based on the above, and if the control unit is determined to be in the strong wind operation state in the second control calculation block, the control unit is always operated in the strong wind operation, and is determined other than the strong wind operation state. In this case, since the constantly ventilating equipment is operated according to the control state determined by the first control calculation block, as in the first aspect of the invention, the always ventilating equipment is turned on / off according to the pressing operation of one operation section. An operation to turn off and a switching operation to switch the air volume between strong and weak can be performed, and an operation to switch the air volume to strong using an external extension switch can be performed. In addition, in the first control calculation block, the control state of the ventilation equipment is always determined based only on the operation of the operation switch unit provided on the switch itself, and the result is lit and displayed with an indicator lamp. The control state determined by the operation of the switch itself regardless of the operation by the switch can be obtained, and the result can be easily discriminated from the display of the indicator lamp.

  According to the invention of claim 4, when the expansion switch is turned on, the air volume becomes strong, and thereafter, after the expansion switch is turned off until the time limit operation of the delay operation time by the time limit means ends, the state where the air volume is high is maintained. Since it is maintained, the period in which the air volume is strong can be extended by the delayed operation time. Therefore, when an extension switch is installed in the toilet, the odor when using the toilet can be discharged quickly, and when switching the air volume from strong to weak by manual operation, the operation is forgotten and the air volume remains strong. However, since the air volume is returned to weak when the time limit operation of the delay operation time by the time limit means is completed, it is possible to prevent the air volume from remaining strong.

  According to the invention of claim 5, since it is possible to select whether or not to enable the timer control by the time limit means using the selection means, the control operation can be changed according to the installation location of the extension switch. improves.

  According to the invention of claim 6, the delay operation time can be set to a desired set value using the time setting means.

  Embodiments of the present invention will be described below with reference to the drawings. First, the circuit configuration of the continuous ventilation equipment control switch A of the present embodiment will be described with reference to FIGS. 1 is a circuit diagram of a control block, and FIG. 2 is a circuit diagram of a load switching control block and a power supply circuit block.

  In this circuit, a surge absorbing element Z1, such as ZNR, is provided between a first load connection terminal (hereinafter abbreviated as a terminal) Ta and a second load connection terminal (hereinafter abbreviated as a terminal) Tb. Each of the capacitors C1 is connected, and a triac TRC1 is connected via a filter inductor L1. A resistor R1 and a capacitor C2 are connected between a T2 terminal and a T1 terminal of the triac TRC1 via a rectifier DB1 formed of a diode bridge. The parallel circuit is connected. Further, a surge absorbing element Z2 such as ZNR and a filter capacitor C3 are also connected between a terminal Ta and a third load connection terminal (hereinafter abbreviated as a terminal) Tc, and via the inductor L1. A triac TRC2 is connected, and a parallel circuit of a resistor R2 and a capacitor C4 is connected between a T2 terminal and a T1 terminal of the triac TRC2 via a rectifier DB2 formed of a diode bridge. Here, the parallel circuit of the resistor R1 and the capacitor C2 is connected between the gate G and the T1 terminal of the triac TRC1, and the parallel circuit of the resistor R2 and the capacitor C4 is connected between the gate G and the T1 terminal of the triac TRC2. Yes, the turn-on / turn-off of the triacs TRC1 and TRC2 is controlled by a control IC 100 as a control unit.

  Further, in this circuit, a resistor R10 as a current limiting means is connected between an additional switch connection terminal (hereinafter abbreviated as a terminal) Td and a terminal Ta via a rectifier DB3 formed of a diode bridge. A light emitting diode on the input side of the photocoupler PC is connected between the DC output terminals of the rectifier DB3. Further, the phototransistor on the output side of the photocoupler PC has a collector pulled up to the power supply voltage, connected to the additional input terminal P5 of the control IC 100, and an emitter connected to the circuit ground. Here, a pair of additional terminals is constituted by the terminals Ta and Td.

  By the way, the constantly ventilating equipment control switch A of the present embodiment has a function of switching the air volume between two levels of strength and weakness, and performs on / off of the constantly ventilating equipment that regularly ventilates the indoor air and switches the air volume. Yes, as a regular ventilation equipment, for example, it has a common terminal, a strong input terminal, and a weak input terminal. ), A strong and weak tap switching type exhaust fan is used that operates in a weak wind (operates in a state where the air volume is weak) when a power source is connected between the common terminal and the weak input terminal. FIG. 3A is a wiring diagram in the case of using a strong and weak tap switching type ventilation fan RL as a regular ventilation facility. An AC power source AC is connected between the common terminal of the ventilation fan RL and the terminal Ta, and the weakness of the ventilation fan RL is shown. The input terminal is connected to the terminal Tb, and the strong input terminal is connected to the terminal Tc. Further, a B contact type extension switch B is connected between the terminals Ta and Td via an AC power supply AC. In the case of the strong / weak tap switching type, when the triac TRC1 is turned on and the triac TRC2 is turned off, the AC power source AC is connected between the common terminal and the weak input terminal of the ventilation fan RL, and the ventilation fan RL operates in a low wind, and the triac When TRC1 is turned off and triac TRC2 is turned on, the AC power supply AC is connected between the common terminal and the strong input terminal of the ventilation fan RL, and the ventilation fan RL is operated in a strong wind.

  A power supply circuit 101 including a resistor R3 and a Zener diode ZD1 is connected between the DC output terminals of the rectifier DB1, and the DC voltage obtained by the Zener diode ZD1 is further stepped down to a predetermined voltage by the three-terminal regulator IC102. The stabilized voltage V2 is used as an operation power supply voltage for the control IC 100 or the like.

  A thyristor SCR1 for turning on the triac TRC1 is connected between the DC output terminals of the rectifier DB1, and a parallel circuit of a resistor R4 and a capacitor C5 is connected between the gate and the cathode of the thyristor SCR1. The anode of the thyristor SCR1 is connected to the emitter of a PNP transistor Q1 having a resistor R5 connected between the base and emitter, and the collector of the transistor Q1 is connected to the gate of the thyristor SCR1 through a Zener diode ZD2. At the same time, it is connected to the voltage input terminal of the three-terminal regulator IC 102 via the diode D1. The base of the transistor Q1 is connected to the collector of the NPN transistor Q2 via the resistor R6. The emitter of the transistor Q2 is connected to the circuit ground, and the base of the transistor Q2 is connected to the collector of the NPN transistor Q3. The emitter of the transistor Q3 is connected to the circuit ground, and the base of the transistor Q3 is connected to the control output terminal P1 of the control IC 100.

  A thyristor SCR2 for turning on the triac TRC2 is connected between the DC output terminals of the rectifier DB2. A parallel circuit of a resistor R7 and a capacitor C6 is connected between the gate and the cathode of the thyristor SCR2. The anode of the thyristor SCR2 is connected to the emitter of a PNP transistor Q4 having a resistor R8 connected between the base and emitter, and the collector of the transistor Q4 is connected to the gate of the thyristor SCR2 via a Zener diode ZD3. At the same time, it is connected to the voltage input terminal of the three-terminal regulator IC 102 via the diode D2. The base of the transistor Q4 is connected to the collector of the NPN transistor Q5 via the resistor R9. The emitter of the transistor Q5 is connected to the circuit ground, and the base of the transistor Q5 is connected to the collector of the NPN transistor Q6. The emitter of the transistor Q6 is connected to the circuit ground, and the base of the transistor Q6 is connected to the control output terminal P2 of the control IC 100.

  Here, the collector of the transistor Q3 (Q6) is pulled up to the power supply voltage, and when the signal level of the control output terminal P1 (P2) of the control IC 100 becomes high level, the transistor Q3 (Q6) is turned on and the transistor Q2 (Q5) turns off. When the transistor Q2 (Q5) is turned off, the transistor Q1 (Q4) is turned off, so that the three-terminal regulator IC 102 is supplied with power that is made constant by the Zener diode ZD1. At this time, the triac TRC1 (TRC2) is turned off because the current necessary for turning on does not flow through the gate of the triac TRC1 (TRC2).

  On the other hand, when the signal level of the control output terminal P1 (P2) of the control IC 100 becomes a low level, the transistor Q3 (Q6) is turned off and the transistor Q2 (Q5) is turned on. When the transistor Q2 (Q5) is turned on, the transistor Q1 (Q4) is turned on, and power is supplied from the rectifier DB1 (DB2) to the three-terminal regulator IC102 via the transistor Q1 (Q4) and the diode D1 (D2). The IC 102 generates an operation power source for the control IC 100 and the like. When the cathode potential of the Zener diode ZD2 (ZD3) becomes higher than the breakdown voltage, a reverse current flows through the Zener diode ZD2 (ZD3), and the thyristor SCR1 (SCR2) of the thyristor SCR1 (SCR2) passes through the Zener diode ZD2 (ZD3). Since a current flows through the gate and the thyristor SCR1 (SCR2) becomes conductive, a current necessary to turn on the gate of the triac TRC1 (TRC2) flows every half cycle of the AC power supply AC, and the triac TRC1 (TRC2) turns on. To do.

  Further, as shown in FIG. 3A, a series circuit of an extension switch B and an AC power source AC is connected between the terminals Td and Ta, and when the extension switch B is turned on, the photo is transmitted through the rectifier DB3 and the resistor R10. A current flows through the light emitting diode on the input side of the coupler PC, the phototransistor is turned on, and the signal level of the extension input terminal P5 becomes low. On the other hand, when the extension switch B is turned off, no current flows through the light emitting diode on the input side of the photocoupler PC, the phototransistor is turned off, and the output signal level becomes high. Here, the resistor R10, the rectifier DB3, and the photocoupler PC constitute a detection circuit 105 that detects the presence or absence of a current flowing between the terminals Ta and Tb and generates a low level detection signal when the current flows. Note that the current flowing between the terminals Ta and Tb when the extension switch B is on is limited by the resistor R10, and it is preferable to set the resistance value of the resistor R10 so that the on-state current is 10 mA or more and 20 mA or less. . That is, by limiting the current at the time of on to the above range, an off-the-shelf low capacity (for example, 1 to 50 W) switch with a pilot lamp can be used for the extension switch B. By turning off the light when it is turned on or off, the operating state of the ventilation fan can be easily determined, and the usability of the switch is improved.

  On the other hand, the operation input terminal P10 of the control IC 100 is connected to the ground via a push button switch SW1 as an operation switch unit, and falls to a low level when the push button switch SW1 is pushed. Further, as described above, the detection signal of the detection circuit 105 is input to the additional input terminal P5 of the control IC 100. In the control IC 100, based on the operation signal from the push button switch SW1 and the detection signal from the detection circuit 105, Control to turn on / off the ventilating fan RL and control to switch the air volume between two levels of strength and weakness are performed.

  Further, the control IC 100 includes, for example, four time setting terminals P11 to P14 in order to set a strong operation continuation time, which will be described later, and the strong operation continuation time is switched according to the signal level of the time setting terminals P11 to P14. In other words, the switching operation of the changeover switch SW2, which is a 4-bit rotary switch, changes the signal level combinations of the time setting terminals P11 to P14 in 16 ways, and the strong operation duration time becomes 16 ways in the range of 0 to 6 hours. It is set. When the strong operation continuation time is set to 0 by the changeover switch SW2, the timer control by the strong operation timer is set to be invalidated. Also, as a set value for the strong operation duration, a relatively short time (several tens of seconds to several minutes) suitable for toilet use and a relatively long time (several tens to several hours) suitable for bathroom use are set. Therefore, when toilet use or bathroom use is selected, it is possible to select a strong operation duration suitable for each use.

  Further, the control IC 100 includes, for example, two operation switching terminals P15 and P16 in order to set an operation mode according to the use application (bathroom use, toilet use) of the ventilation fan. These terminals P15 and P16 are connected to the ground via a changeover switch SW3 composed of a two-position slide switch, and the signal levels of the terminals P15 and P16 change according to the changeover operation of the changeover switch SW3. Therefore, the operation mode is an operation mode suitable for bathroom use (mode in which low wind operation or temporary suspension is performed during bathing, and after returning to low wind operation after bathing for a certain period after bathing), or suitable for toilet use It is set to one of the operation modes (a mode in which a strong wind operation is performed while the toilet is in use, and the strong wind operation is continued for a certain period after use and then returned to a low wind operation).

  Further, the control IC 100 selects whether to enable the timer control for continuing the strong wind operation until the predetermined delay operation time elapses after the extension switch B is switched from on to off. For example, two timer setting terminals P17 and P18 are provided. These terminals P17 and P18 are connected to the ground via a change-over switch SW4 (selection means) made up of a two-position type slide switch, and the terminals P17 and P18 are switched according to the switching operation of the change-over switch SW4. By changing the signal level, switching between enabling or disabling the delay time operation is performed.

  The lighting output terminals P3 and P4 of the control IC 100 are connected to a red light emitting diode LD1 for displaying strong wind operation and an orange light emitting diode LD2 for displaying low wind operation, respectively. By setting the terminals P3 and P4 to a low level, current flows through the light emitting diodes LD1 and LD2 serving as indicator lamps to emit light. Here, the control IC 100 continuously lights up the red light emitting diode LD1 during the strong wind operation, and continuously lights up the orange light emitting diode LD2 during the low wind operation. By changing the color of the indicator light, the control IC 100 is operating in the strong wind operation. It is easy to check whether the vehicle is operating in low wind. Since the control IC 100 blinks the red light emitting diode LD1 during the strong wind control by the strong timer control, the timer control is in progress or the continuous operation is performed depending on whether the light emitting diode LD1 is continuously lit or blinking. It can be easily checked whether it is in the middle (operating state other than during timer control).

  In FIG. 1, reference numeral 103 denotes a reset circuit for resetting the control IC 100 when the power is turned on, and reference numeral 104 denotes a reference clock generation circuit of the control IC 100.

  Next, the structure of this continuous ventilation equipment control switch A will be described with reference to FIGS. The switch 10 for the continuous ventilation equipment control switch has a rectangular parallelepiped shape, and is formed by a synthetic resin body 11 having a front opening and a synthetic resin cover 12 having a rear opening coupled to the front side of the body 11. ing. That is, the assembly piece 12a extends rearward from the rear end edge of the cover 12, and the assembly holes 12b provided in the assembly piece 12a are engaged with the assembly protrusions 11a formed on the upper and lower surfaces of the body 11. Thus, the body 11 and the cover 12 are coupled.

  The horizontal dimension of the container body 10 is substantially equal to the horizontal dimension (short direction) of the window hole of the ready-made mounting frame (not shown) for the embedded wiring apparatus, and forms the front part of the container body 10. A pair of mounting claws 13 that can be engaged with instrument mounting holes (not shown) provided on both side pieces surrounding the window hole of the mounting frame are provided on the left and right side surfaces of the cover 12. Is engaged with the instrument mounting hole of the mounting frame so that the container 10 is held by the mounting frame 40. In addition, on one side wall (right side wall) of the cover 12 in the left-right direction, two cut grooves 14 whose rear ends are opened on both the upper and lower sides of the portion where the pair of mounting claws 13 project are provided along the front-rear direction. The part between the two cut grooves 14 forms a bending piece 15 having flexibility in the thickness direction. A void is formed in the back surface side of the bending piece 15 in the cover 12, and the pair of mounting claws 13 provided on the bending piece 15 are removed from the side surface of the cover 12 by bending the bending piece 15 to the inside of the cover 12. Since it can be elastically retracted, it can be easily attached to and detached from the mounting frame of the vessel body 10. A push projection 15a is provided on the outer surface of the rear end portion of the flexure piece 15 so as to make it easy to push the flexure piece 15.

  Inside the body 11 is housed a circuit board 16 made of a printed wiring board on which a component for the load switching control block and power supply circuit block shown in FIG. 2 and a plurality of terminals for connecting external wires are mounted. ing. Here, the individual terminals mounted on the circuit board 16 are made from an electrically conductive leaf spring that connects an external electric wire inserted into the container body 10 through an electric wire insertion hole (not shown) formed in the rear wall of the body 11. It consists of a quick connection terminal that is connected and held by the spring force of the locking spring. The plurality of terminals include the four terminals Ta to Tc described above.

  On the other hand, the cover 12 houses a circuit board 17 made of a printed wiring board on which the components of the control circuit block shown in FIG. 1 are mounted. The pushbutton switch SW1 and the changeover switch of the pushbutton switch SW1 mounted on the circuit board 17 are accommodated. The operation knobs SW2 to SW1 are exposed to the front surface of the cover 12 (that is, the front surface of the container body 10) through the window holes 18a to 18d penetrating the front wall of the cover 12, respectively. That is, the push button 19 of the push button switch SW1 is exposed through the round hole-shaped window hole 18a formed at the substantially center in the vertical direction in the right half of the front surface of the container body 10, and the round hole-shaped formed on the upper side of the window hole 18a. The knob 20 is exposed through the window hole 18b, and the switch 20 is formed of a slide switch through the rectangular hole holes 18c and 18d provided in parallel to the lower side of the window hole 18a. , SW4 controls are exposed. In addition, a through hole 26 is provided in the left side of the front surface of the cover 12 at a portion facing the two-color light emitting diodes LD1 and LD2 mounted on the circuit board 17, and light from the light emitting diodes LD1 and LD2 is transmitted through the hole. 26 irradiates the outside of the vessel 10 through 26. The circuit board 17 and the circuit board 16 are electrically connected via a lead wire (not shown).

  A rectangular plate-shaped operation handle 30 (operation unit) for operating the push button switch SW1 is rotatably attached to the front side of the body 10 so as to cover the front surface of the body 10. In other words, a pair of shaft portions 27 projecting obliquely forward to pivotally mount the operation handle 30 are integrally formed on the left end portion of the front surface of the cover 12, and the pair of shaft portions 27 are provided on the rear surface of the operation handle 30. The operation handle 30 is pivotally attached to the container body 10 by being rotatably fitted in a bearing portion (not shown) provided at the left end portion. On the back surface of the operation handle 30, a push projection (not shown) protrudes from a portion facing the push button 19 exposed on the front surface of the cover 12. When the right side portion of the operation handle 30 is pressed, the operation handle 30 is pressed. Rotates about the shaft portion 27, the push button 19 is pushed by the push projection of the operation handle 30, and the push button switch SW1 is turned on. On the other hand, when the force for pushing the push button handle 30 is lost, the push button handle 30 receives the reaction force of the push button 19 and the like and returns to the return position, the force for pushing the push button 19 is lost, and the push button switch SW1 is turned off.

  A thin portion 31 thinner than the left end portion is provided on the right side portion of the front surface of the operation handle 30, and the thin portion 31 has a round hole shape through which the knob 20 is inserted into a portion corresponding to the window hole 18 b of the cover 12. Window holes 32 are provided, and window holes 33 and 34 are provided at portions corresponding to the window holes 18c and 18d of the cover 12 to expose the knobs 21 and 22 covered with the operation switches SW3 and SW4. (See FIG. 7A). Further, a projecting portion 35 that protrudes forward is provided on the left side of the front surface of the operation handle 30, and a light guide member 23 formed of a light-transmitting synthetic resin at a substantially central portion in the vertical direction of the projecting portion 35. A through hole 36 into which the projection 23a of the light source is fitted is formed, and the light of the light emitting diodes LD1 and LD2 accommodated in the container 10 is guided by the through hole 26 of the cover 12 and the operation handle 30. The light is emitted to the front side of the operation handle 30 through the member 23. As described above, the knobs 20 to 22 of the changeover switches SW2 to SW4 are exposed on the front side of the operation handle 30, so that the user can easily perform the use switching operation and the timer setting operation.

  Further, a cover 38 is attached to the operation handle 30 so as to freely open and close the thin portion 31 where the knobs 20 to 22 of the changeover switches SW2 to SW4 are exposed. The cover 38 is formed such that the horizontal and vertical dimensions thereof are substantially the same as the horizontal and vertical dimensions of the thin portion 31, respectively, and from the upper and lower ends of the left side of the cover 38 toward the side. Projecting arms 39 and 39 are projected, and a shaft 39 a pivotally supported by shaft holes 37 provided on both upper and lower side surfaces of the projecting portion 35 is projected at the tip of each arm 39. Thus, the shaft 38 a provided on the arm 39 of the cover 38 is pivotally attached to the shaft hole 37 provided in the protruding portion 35 of the operation handle 30, so that the cover 38 is pivotally supported with respect to the operation handle 30. Is done. Here, a permanent magnet 24 is attached to the back surface of the cover 38, and an iron piece 25 is attached to a portion facing the permanent magnet 24 on the back surface of the operation handle 30, and the iron piece 25 is attracted by the magnetic force of the permanent magnet 24. By doing so, the cover 38 is kept closed.

  Next, the operation in the case where the operation for turning on / off the ventilation fan installed in the toilet and the operation for switching the air volume are performed at two locations by using the continuous ventilation equipment control switch A will be described. In the following explanation, as shown in FIG. 3 (a), a strong / tap switching type ventilation fan RL is connected, an expansion switch B is connected, and an operation mode suitable for toilet use is selected using the changeover switch SW3. It shall be.

  Meanwhile, the control IC 100 determines the control state of the ventilation fan RL based on the first control calculation block 100a that determines the control state of the ventilation fan RL based on the operation signal from the push button switch SW1 and the detection signal from the detection circuit 105. The second control calculation block 100b is provided, and the operation of the ventilation fan RL is controlled based on the control state determined by both the blocks 100a and 100b. The first and second control operation blocks 100a and 100b are realized by the operation function of the control IC 100.

  The first control calculation block 100a alternately switches the air volume of the ventilation fan RL between strong and weak each time an operation signal whose time width is shorter than a predetermined time is input from the push button switch SW1, and the time width is equal to or longer than the predetermined time. When the operation signal is input, the ventilation fan RL is stopped, and when the operation signal having a time width shorter than the predetermined time is input while the ventilation fan RL is stopped, the ventilation fan RL is controlled to operate with a low air flow. Determine the state. On the other hand, the second control calculation block 100b determines the control state so that the air volume of the ventilation fan RL is increased while the detection signal is input from the detection circuit 105. Then, the control IC 100 switches the air volume of the ventilation fan RL to strong when the second control calculation block 100b is determined to be a strong wind operation, and when the second control calculation block 100b is determined to be other than the strong wind operation, the first is performed. The ventilation fan RL is operated according to the control state determined by the control circuit block 100a. The control IC 100 changes the lighting state of the light emitting diodes LD1 and LD2 in accordance with the control state determined by the first control arithmetic block 100a, and the first control arithmetic block 100a is changed from the lighting state of the light emitting diodes LD1 and LD2. The control state determined in step 1 can be confirmed.

  First, the operation when the timer control by the strong operation timer is invalidated using the changeover switch SW2 and the extension switch B is not operated will be described. The constantly ventilating facility control switch A controls the operation of the ventilating fan RL, which is a constantly ventilating facility, and the control IC 100 normally controls the ventilating fan RL in a low wind operation. That is, the control IC 100 sets the signal level of the control output terminal P1 to the low level, the signal level of the control output terminal P2 to the high level, turns on the triac TRC1, and turns off the triac TRC2, thereby common terminal with the weak input terminal of the ventilation fan RL. The AC power supply AC is connected between and the ventilation fan RL is operated in a low wind.

  When the operation handle 30 is pushed for a short time while the ventilation fan RL is operating in a low wind, the operation input terminal P10 of the control IC 100 is connected to the ground via the push button switch SW1, and the signal level of the operation input terminal P10 is The first control calculation block 100a determines the control state of the ventilation fan RL as a strong wind operation in response to the operation signal, and the control IC 100 performs the first control calculation because the low level is set for a short time (a time shorter than the predetermined time). Based on the determination of the block 100a, the air volume of the ventilation fan RL is switched to strong. That is, the control IC 100 sets the signal level of the control output terminal P1 to the high level and the signal level of the control output terminal P2 to the low level to turn off the triac TRC1 and turn on the triac TRC2, and is a common terminal with the strong input terminal of the ventilation fan RL. The AC power supply AC is connected between the ventilation fan RL and the ventilation fan RL.

  Thus, every time the operation handle 30 is pressed for a short time and an operation signal whose time width is shorter than a predetermined time is input from the push button switch SW1 to the operation input terminal P10 of the control IC 100, the first control calculation block 100a. The control state is determined so as to alternately switch the air volume of the ventilation fan RL between weak and strong, and by pressing the operation handle 30 for a short time, the operation of switching the air volume can be performed.

  Further, when the operation handle 30 is kept pressed for a predetermined time (for example, 2 to 3 seconds) or more, the signal level of the operation input terminal P10 becomes a low level for a predetermined time or more, so the first control calculation block 100a responds to this operation signal. Then, the control state of the ventilation fan RL is determined to be the stop state, and the control IC 100 stops the ventilation fan RL according to this determination. That is, the control IC 100 turns off the triacs TRC1 and TRC2 by setting both the signal levels of the control output terminals P1 and P2 to the high level when the signal level of the operation input terminal P10 is kept at the low level for a predetermined time or more. The power supply to the ventilation fan RL is stopped, and the ventilation fan RL is stopped.

  When the operation handle 30 is pressed for a short time while the ventilation fan RL is stopped, the signal level of the operation input terminal P10 becomes a low level for a short time. Therefore, the first control calculation block 100a responds to this operation signal with the ventilation fan RL. The control IC 100 causes the ventilation fan RL to operate in a low wind.

  Next, the operation of switching the air volume of the ventilation fan RL using the external extension switch B connected to the constant ventilation equipment control switch A will be described with reference to the time chart of FIG. It is assumed that the delay time limit operation is set to be invalid by sliding the knob 22 of the changeover switch SW4 to the “none” position.

  When the expansion switch B is turned on (off → on) at time t1 when the ventilation fan RL is operating in a low wind, a current flows between the terminals Ta and Td via the expansion switch B, and the expansion circuit B is connected to the expansion input terminal. A low level detection signal is input to P5. At this time, the second control calculation block 100b determines that the control state of the ventilation fan RL is a strong wind operation based on the detection signal of the detection circuit 105, and the control IC 100 changes to the control state determined by the second control calculation block 100b. Therefore, the ventilation fan RL is operated in a strong wind.

  Thereafter, when the extension switch B is turned off at time t2, the current stops flowing between the terminals Ta and Td, the detection signal is not output from the detection circuit 105, and the second control calculation block 100b Since the control state of the ventilation fan RL is determined to be the low wind operation, the control IC 100 causes the ventilation fan RL to operate in the low wind according to the control state determined by the first control circuit block 100a.

  Next, the operation in the case where the operation by the constant ventilation equipment control switch A and the operation by the expansion switch B are performed in parallel will be described with reference to the time chart of FIG. In the description of FIG. 5, it is assumed that timer control by the strong operation timer is enabled using the changeover switch SW2 and the strong operation duration DT1 is set to 30 minutes, for example. Further, the period indicated by hatching in FIG. 5 indicates the period during the timer control by the strong operation timer.

  During the period up to time t10, the control IC 100 operates the ventilation fan RL in a low wind, and the control IC 100 turns off the red light-emitting diode LD1 and lights up the orange light-emitting diode LD2 to indicate that the light wind operation is in progress.

  When the user using the toilet presses the operation handle 30 at time t10 during the low wind operation, an operation signal is input from the push button switch SW1 to the control IC 100, and the first control calculation block 100a responds to this operation signal by the ventilation fan. The control state of RL is a strong wind operation, and the control IC 100 causes the ventilation fan RL to perform a strong wind operation, turns on the red light emitting diode LD1 and turns off the orange light emitting diode LD2, and performs a strong wind operation display.

  Next, when the user who has finished using the toilet at time t11 presses the operation handle 30 again and an operation signal is input from the push button switch SW1 to the control IC 100, the first control calculation block 100a according to the operation signal. Starts the time limit operation of the strong operation duration time DT1 by the strong operation timer and blinks the red light emitting diode LD1 to indicate that the timer operation is in progress. Then, at time t12 when the time limit operation by the strong operation timer ends, the first control calculation block 100a sets the control state of the ventilation fan RL to the low wind operation, the control IC 100 causes the ventilation fan RL to perform the low wind operation, and turns off the light emitting diode LD1. The light emitting diode LD2 is turned on.

  Next, when the expansion switch B is turned on at time t13 when the ventilation fan RL is operating in a low wind, the second control circuit block 100b determines the control state of the ventilation fan to be a strong wind operation in response to a detection signal from the detection circuit 105. Then, the control IC 100 causes the ventilation fan RL to operate in a strong wind. Thereafter, when the extension switch B is turned off at time t14, the second control circuit block 100b determines the control state of the ventilation fan RL to be a low wind operation, so the control IC 100 is determined by the first control circuit block 100a. The ventilation fan RL is operated in a low wind according to the control state.

  Thereafter, the operation handle 30 is pushed at time t15 to switch the air volume of the ventilation fan RL from weak to strong, and further, the operation handle 30 is pushed at time t16, while the strong operation timer is performing the time limit operation. When the expansion switch B is turned on (time t17 to t20), the second control circuit block 100b determines the control state of the ventilation fan RL to be a strong wind operation, but since the ventilation fan RL has already been operated in a strong wind, the ventilation fan RL. The driving state remains in strong wind operation.

  When the operation handle 30 is pushed at time t18 during the time limit operation of the strong operation timer, the first control circuit block 100a stops the time limit operation by the strong operation timer and sets the control state of the ventilation fan RL to the strong wind operation. The red light emitting diode LD1 is continuously turned on to indicate that a strong wind operation is in progress. After that, when the operation handle 30 is pushed again at time t19, the first control circuit block 100a starts the time limit operation by the strong operation timer and blinks the red light emitting diode LD1 to indicate that the timer control is being performed. Then, at time t21 when the time limit operation of the strong operation timer ends, the control IC 100 switches the control state of the ventilation fan RL from the strong wind operation to the low wind operation, turns off the red light emitting diode LD1, and turns on the orange light emitting diode LD2. Lights up during light wind operation.

  Further, when the operation handle 30 is pushed continuously for a predetermined time DT3 or more at time t22, the first control circuit block 100a stops the control state of the ventilation fan RL based on the operation signal from the operation handle 30, and performs control. The IC 100 stops the ventilation fan RL and turns off the light emitting diodes LD1 and LD2 to display the stop state of the ventilation fan RL.

  When the operation handle 30 is pushed at time t23 when the ventilation fan RL is stopped, the first control circuit block 100a sets the control state of the ventilation fan RL to the low wind operation based on the operation signal from the operation handle 30, The control IC 100 causes the ventilation fan RL to operate in a low wind, and turns on the orange light emitting diode LD2 to light up and display the state of the low wind operation.

  As described above, the control IC 100 turns on / off the ventilation fan RL and switches the air volume according to the pressing operation of the operation handle 30 provided on the switch itself, and controls the air volume based on the operation of the external expansion switch B. Since switching control is performed, it is possible to switch the air volume of a constant ventilation facility installed in a toilet or bathroom at a plurality of locations (for example, two locations), improving usability. As shown in FIG. 3B, a three-way switch circuit may be configured by connecting two c-contact type extension switches C and D in series via an AC power source AC between terminals Td and Ta. By connecting two extension switches C and D in addition to the constant ventilation equipment control switch A, the air volume of the ventilation fan RL can be switched at three locations.

  By the way, in the above description of the operation, the case where the knob 22 of the changeover switch SW4 is slid to the “None” position to invalidate the delay time limit operation has been explained. However, as shown in FIG. 7A, the knob of the changeover switch SW4 is selected. 22 is slid to the “present” position to enable the delay time limit operation, the delay timer (time limit means) built in the control IC 100 starts from when the detection signal input from the detection circuit 105 stops. The time limit operation for a predetermined delay time is started, and the ventilation fan RL is operated in a strong wind until the time limit operation of the delay timer is completed.

  FIG. 6 is a time chart showing the operation when the delay time limit operation is validated. The control IC 100 delays the predetermined delay operation time DT4 after the extension switch B is switched from ON to OFF at time t4. Since the time limit operation of the timer is started and the time limit operation is ended, the strong wind operation of the ventilation fan RL is continued, and at the time t5 when the time limit operation by the delay timer is ended, the ventilation fan RL is operated in a low wind. The period during which the RL operates in strong winds can be extended by a delay time, and when the toilet is ventilated by the ventilation fan RL, the odors in the toilet can be quickly discharged, and the manual operation from strong wind to low wind It is possible to prevent a strong wind operation from being forgotten as in the case of switching to. In addition, since it is possible to select whether to enable or disable the delay time-limited operation using the changeover switch SW4, usability is improved by switching the operation in accordance with the use situation.

  Note that the changeover switch SW4 shown in FIG. 7A is a two-position type slide switch and can select only whether to enable or disable the delay time operation, but FIG. 7B. As shown in Fig. 3, a 3-position type slide switch is used as the changeover switch SW4, the position where the delay time limit operation is invalid, the position where the delay time limit operation is valid, and the position where the delay time limit is set to 3 minutes and the position where the delay time limit operation is set to 5 minutes By providing the above, it may be possible to set the time of the delay time limit operation, and the delay time limit time can be changed according to the use situation, so that the usability is further improved. In this case, the selection switch SW4 for selecting whether to enable or disable the timer control by the delay timer and the delay operation time are alternatively selected from a plurality of set values. And time setting means.

It is a circuit diagram of the control circuit block of this embodiment. It is a circuit diagram of a load switching control block and a power supply circuit block same as the above. (A) (b) is a wiring diagram explaining the use condition same as the above. It is a time chart explaining operation | movement same as the above. It is a time chart explaining another operation | movement same as the above. It is a time chart explaining another operation | movement same as the above. (A) (b) is explanatory drawing explaining the switching position of a selector switch. It is an exploded perspective view same as the above. It is an external appearance perspective view same as the above.

Explanation of symbols

100 Control IC
SW1 push button switch SW2 to SW4 selector switch LD1, LD2 Light emitting diode

Claims (6)

A switch for constantly ventilating equipment control that switches on and off the constantly ventilating equipment that constantly ventilates indoor air with the function of switching the air volume between two levels of strength and weakness, and that switches the air volume.
An operation switch unit that outputs an operation signal only when the operation unit is pushed, a detection circuit unit that detects on / off of an external extension switch, and generates a detection signal if it is on, A control unit that constantly operates the ventilation equipment in a desired control state based on the operation signal from the operation switch unit and the detection signal from the detection circuit unit;
The control unit always reverses the air volume of the ventilation equipment to strong or weak every time an operation signal with a time width shorter than a predetermined time is input from the operation switch unit, and an operation signal with a time width of a predetermined time or more is input. When the operation signal is input, an operation signal with a duration shorter than a predetermined time is input while the ventilation system is stopped, and the ventilation system is operated with a low air volume and is detected. A constantly ventilating equipment control switch that switches the air volume of the constantly ventilating equipment to strong regardless of the operation signal from the operation switch while the detection signal is input from the circuit section.   A series circuit of an extension switch and a power source is connected between the pair of extension terminals, and the detection circuit section includes a circuit for detecting on / off of the extension switch based on the presence or absence of current flowing between the pair of extension terminals. 2. The continuous ventilation equipment control switch according to claim 1, further comprising a current limiting means for setting a current flowing between the pair of additional terminals when on to 10 mA or more and 20 mA or less.   The control unit includes a first control calculation block that determines a control state based on an operation signal from an operation switch unit, and a second control calculation block that determines a control state based on a detection signal from a detection circuit unit; The first control calculation block alternately switches the air volume of the ventilation equipment to strong or weak every time an operation signal whose time width is shorter than a predetermined time is input from the operation switch unit, and the time width is When an operation signal for a predetermined time or more is input, the ventilation system is stopped at all times, and when an operation signal with a time width shorter than the predetermined time is input while the ventilation system is stopped, the constant ventilation system The control state is determined so as to operate, and the second control calculation block determines the control state so that the ventilation equipment is always operated in a strong wind while the detection signal is input from the detection circuit unit. System When the strong air operation is determined in the calculation block, the ventilation fan is operated with a strong air flow. When the non-strong air operation is determined in the second control calculation block, the control state determined in the first control calculation block is used. The continuous ventilation equipment control switch according to claim 1, further comprising an indicator lamp for operating the ventilation fan and displaying a control state determined by the first control calculation block.   A time-limit means is provided for timing a predetermined delay operation time from the time when detection signal input from the detection circuit section stops, and the control section continues until the time-limit operation of the time limit means ends even after detection signal input stops. 2. The constantly ventilating equipment control switch according to claim 1, wherein the control state is determined so that the air volume of the constantly ventilating equipment is increased during the period.   5. The continuous ventilation equipment control switch according to claim 4, further comprising selection means for selecting whether to enable or disable the timer control by the time limit means. 5. The constantly ventilating equipment control switch according to claim 4, further comprising time setting means for selectively selecting the delay operation time from a plurality of set values.

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