Switch and method for controlling the switch

Abstract

A switch (100) is provided with: an operating handle unit (1) installed on the front face; a control unit (5) which generates an output command signal on the basis of an operation with respect to the operating handle unit (1); and a power supply unit (8) which includes a first relay for switching connection and disconnection of a power supply input line, a second relay connected in series to the first relay, and a bypass resistance connected in parallel to the second relay, and which receives power supply from an external power supply and supplies power to an external load on the basis of an output command signal. The control unit (5), once a switching operation for switching the power supply input line from disconnection to connection is performed on the operating handle unit (1), opens the second relay for a preset period and closes the first relay in a period in which the second relay is open.

Description

[Technical field]

[0001] The present disclosure relates to a wall-mounted switch used to operate equipment such as lighting fixtures and ventilation fans, and a control method thereof. [Background technology]

[0002] 2. Description of the Related Art Lighting fixtures and ventilation fans are often installed in high places such as on the ceiling, making it difficult to operate them by touching them directly. Therefore, they are often operated using switches installed on the wall.

[0003] Patent Document 1 discloses a switch system that allows devices such as lighting fixtures and ventilation fans to be remotely controlled from a distance via wireless communication. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-129468 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the switch system disclosed in the above Patent Document 1, by providing a time difference between the timing of sending control signals to devices to be operated, it is possible to prevent inrush currents from occurring simultaneously in multiple devices and reduce the inrush current in the entire house. However, the switch system disclosed in the above Patent Document 1 cannot reduce the inrush current in the switch itself. Therefore, when a device with a large inrush current to the switch, such as a device equipped with a DC motor, is connected, electronic components that can withstand the inrush current must be selected, which leads to problems such as increased costs and increased component size.

[0006] The present disclosure has been made in view of the above, and has an object to provide a switch that can reduce inrush current to the switch itself. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the switch according to the present disclosure includes an operating handle unit installed on a front surface, a control unit that generates an output command signal based on an operation on the operating handle unit, a first relay that switches between connection and disconnection of a power supply input line, a second relay connected in series with the first relay, and a bypass resistor connected in parallel with the second relay, and a power supply unit that receives power from an external power supply and supplies power to an external load based on the output command signal. When a switching operation is performed on the operating handle unit to switch the power supply input line from disconnection to connection, the control unit opens the second relay for a preset period and closes the first relay while the second relay is open. Effect of the Invention

[0008] The switch according to the present disclosure has an advantage of being able to reduce inrush current into the switch itself. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a configuration of a ventilation system using a switch according to a first embodiment. [Diagram 2] FIG. 1 is a perspective view of a switch according to a first embodiment; [Diagram 3] FIG. 1 is a perspective view of a switch according to a first embodiment; [Figure 4] Schematic diagram of a switch according to the first embodiment. [Diagram 5] FIG. 1 is an exploded perspective view of a switch according to a first embodiment; [Figure 6] Schematic exploded view of the switch according to the first embodiment. [Figure 7] Functional block diagram of a switch according to the first embodiment [Figure 8] FIG. 1 is a diagram showing a schematic configuration of a power supply unit of a switch according to a first embodiment; [Figure 9] FIG. 1 is a diagram showing the configuration of a motor circuit to which load driving power is supplied from a switch according to a first embodiment; [Figure 10]Schematic diagram of a power supply unit of a switch according to the first embodiment. [Figure 11] FIG. 1 is a diagram showing signal waveforms of a switch according to the first embodiment; [Figure 12] FIG. 1 is a diagram showing the configuration of a motor circuit to which load driving power is supplied from a switch according to a first embodiment; [Figure 13] FIG. 11 is a diagram showing signal waveforms of a switch according to a second embodiment; [Figure 14] FIG. 1 is a diagram showing an example of a hardware configuration of a control unit of a switch according to the first and second embodiments; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A switch and a method for controlling the switch according to an embodiment will be described in detail below with reference to the drawings.

[0011] Embodiment 1 FIG. 1 is a diagram showing the configuration of a ventilation system using a switch according to the first embodiment. In the ventilation system 200, a wall-mounted switch 100 is connected to each of a plurality of ventilation fans 42. In the ventilation system 200, the operating state of the ventilation fans 42 is instructed by operating the switch 100. Each of the switches 100 is connected to a router 61 by wireless communication. The router 61 is connected to a network 63. The switch 100 is connected to a server 62 and a user terminal 64 via the network 63. Note that the ventilation system 200 may not be configured using a plurality of ventilation fans 42, and may be operated as a ventilation device using a set of the ventilation fans 42 and the switch 100.

[0012] 2 and 3 are perspective views of the switch according to the first embodiment. FIG. 2 shows the switch 100 as viewed from the front side exposed to the room. FIG. 3 shows the switch 100 as viewed from the rear side embedded in the wall 110. FIG. 4 is a schematic diagram of the switch according to the first embodiment. FIG. 5 is an exploded perspective view of the switch according to the first embodiment. FIG. 6 is an exploded schematic view of the switch according to the first embodiment. FIG. 7 is a functional block diagram of the switch according to the first embodiment. The switch 100 includes a housing 20 housed inside the wall 110, a wiring box 10 that covers the housing 20 inside the wall 110, a design part 30 exposed from the wall 110, and a mounting frame 3 for mounting to the wall 110. Note that the wiring box 10 is omitted from the illustration in FIG. 2 and FIG. 3. Also, the mounting frame 3 is omitted from the illustration in FIG. 2 and FIG. 3.

[0013] The mounting frame 3 is fixed to the wall 110 using wood screws (not shown) that are inserted through the mounting holes 3a. By fixing the mounting frame 3 to the wall 110, the entire switch 100 is fixed to the wall 110.

[0014] The design part 30 comprises a resin operating handle part 1 arranged to cover the operating switch 4, and a cover 2 surrounding the periphery of the operating handle part 1. The operating handle part 1 is a part that allows the user to switch the ventilation fan 42 on and off and to adjust the operating intensity, and is installed in front of the switch 100. The cover 2 is attached to the mounting frame 3 by fitting with claws or the like.

[0015] As shown in Fig. 4, the operation handle unit 1 includes a first operation handle 51, a second operation handle 52, and a display unit 53. The first operation handle 51 is a component for switching the on / off of the ventilation fan 42 by a user operation. The second operation handle 52 is a component for switching the operating intensity of the ventilation fan 42 between high and low by a user operation. The display unit 53 displays the on / off state of the ventilation fan 42, the operating intensity state, and the wireless communication state.

[0016] The body 20 includes a control unit 5, a communication unit 6, a protective cover 7, and a power supply unit 8. The body 20 also includes a rectangular tubular body cover 9 that houses the control unit 5, the communication unit 6, the protective cover 7, and the power supply unit 8, and an operation switch 4 that covers the front surface of the body cover 9. The operation handle unit 1 is attached to the operation switch 4 by fitting with a claw or the like. Note that the body cover 9 may be any shape as long as it is tubular, and is not limited to a rectangular tubular shape.

[0017] The operation switch 4 is provided with a switch transmission part 4a. The switch transmission part 4a is deformable, and when the first operation handle 51 or the second operation handle 52 is pressed, it deforms toward the control part 5. When the switch transmission part 4a deforms toward the control part 5, a button (not shown) provided on the control part 5 is pressed.

[0018] The control unit 5 outputs an output command signal instructing the output state to the power supply unit 8. There are three output states: strong operation, weak operation, and stopped. The control unit 5 generates the output command signal based on an operation of the operating handle unit 1 requesting switching of the operation state of the ventilation fan 42.

[0019] The control unit 5 outputs a communication signal to the communication unit 6 via the communication wiring 60. The communication signal is output as a state change signal. That is, a first state change signal indicating that the driving state has been switched from on to off, a second state change signal indicating that the driving state has been switched from off to on, a third state change signal indicating that the driving intensity has been switched from strong to weak, and a fourth state change signal indicating that the driving intensity has been switched from weak to strong are defined, and when the state is switched by the operation of the operating handle unit 1, the corresponding state change signal is output.

[0020] The communication unit 6 is housed in a portion of the body cover 9 that is forward of the portion where the protective cover 7 is disposed. The communication unit 6 receives a state change signal output from the control unit 5 via the communication wiring 60, and outputs a wireless signal 65 to the router 61.

[0021] The communication unit 6 receives a state change signal from the control unit 5, and transmits the driving state and driving intensity indicated by the state change signal to the user terminal 64 by wireless signal. It also receives a switching operation other than that performed by the operating handle unit 1, for example, a signal of remote operation by the user terminal 64, and transmits the signal to the power supply unit 8. By transmitting the remote operation signal to the power supply unit 8 by the communication unit 6, a relay in the power supply unit 8 can be opened and closed.

[0022] The power supply unit 8 has electronic components that open and close the electronic circuit, as well as a terminal block 21 to which an external power supply 86 is connected and a load such as a ventilation fan 42. The power supply unit 8 is supplied with power through the terminal block 21 and also supplies power to the load side.

[0023] The terminal block 21 includes a power input terminal 82 to which a power input line 81 that receives 100V AC power from an external power source 86 is connected, and an output terminal 83 to which an output wiring 40 that supplies DC power to the motor circuit 41 is connected. The power source unit 8 generates 12V DC from the 100V AC supplied from the external power source 86, and supplies it to the control unit 5 through the control wiring 50. The communication unit 6 is supplied with 12V DC from the control unit 5 through the communication wiring 60. Therefore, a voltage lower than the voltage supplied from the external power source 86 to the power source unit 8 is applied to the control unit 5 and the communication unit 6. The power source unit 8 also supplies load driving power to the motor circuit 41 based on an output command signal from the control unit 5.

[0024] The protective cover 7 is disposed forward of the power supply unit 8 and abuts against the inner wall of the body cover 9, isolating the space inside the body cover 9 in which the power supply unit 8 is disposed from the operation handle unit 1. For example, the protective cover 7 is disposed between the power supply unit 8 and the communication unit 6. In the first embodiment, the power supply unit 8 is a high-voltage unit to which a high voltage of 50 V or more is applied, and the control unit 5 and the communication unit 6 are low-voltage units to which a low voltage of less than 50 V is applied. The protective cover 7 prevents heat generation in the power supply unit 8, which is a high-voltage unit, from affecting the control unit 5 and the communication unit 6, which are low-voltage units, and the operation handle unit 1, which is an operation unit.

[0025] The wiring box 10 is disposed so as to cover the housing 20. The switch 100 is fixed to a wall 110 by screws passing through the mounting holes 3a, with the wiring connected to the terminal block 21 stored in the wiring box 10.

[0026] FIG. 8 is a diagram showing a schematic configuration of the power supply unit of the switch according to the first embodiment. The detailed structure of the power supply unit 8 will be described later. The control unit 5 is electrically connected to the communication unit 6 and the power supply unit 8 using lead wires and connectors (not shown). When the first operating handle 51 of the control unit 5 is pressed, the first relay 90 in the power supply unit 8 is closed, and a current flows to the ventilation fan 42. That is, the first operating handle 51 accepts a switching operation for switching the power input line 81 from disconnection to connection and a switching operation for switching the power input line 81 from disconnection to disconnection. The current immediately after the first relay 90 is closed is called an inrush current, and a large current flows instantaneously. In particular, a large current flows in a device equipped with a DC motor compared to a device equipped with an AC motor due to the circuit specifications. In order to reduce this inrush current, the power supply unit 8 includes a second relay 91 and a bypass resistor 92. Immediately after the first relay 90 is closed, the second relay 91 is open, so a current flows in the bypass resistor 92. After a certain period of time has elapsed, the second relay 91 is closed, thereby reducing the inrush current flowing through the electronic components.

[0027] The time when the second relay 91 is closed can be arbitrarily set by the control unit 5. In other words, the period during which the second relay 91 is open can be set by the control unit 5. Therefore, when it is desired to change the time during which the inrush current flows, this can be easily achieved by changing the setting of the time when the second relay 91 is closed by the control unit 5.

[0028] Even when it is desired to connect a device with a large inrush current to the switch 100, it is possible to easily deal with this because only the bypass resistor 92 needs to be changed and there is no need to change the first relay 90 and the second relay 91.

[0029] FIG. 9 is a diagram showing the configuration of a motor circuit to which load driving power is supplied from the switch according to the first embodiment. FIG. 9 shows an example of a motor circuit 41 when an AC induction motor is used. As shown in FIG. 9, the motor circuit 41 includes a capacitor induction motor configured by connecting an auxiliary winding 111 and a main winding 112 in parallel to an AC power source and connecting a capacitor 113 in series to the auxiliary winding 111. The auxiliary winding 111 and the main winding 112 are out of phase with each other by the capacitor 113. A variable speed winding 114 is wound in series around the main winding 112. The speed of the capacitor induction motor is adjusted by switching the connection positions of the AC power source between a position 117 including only the main winding 112 and a position 118 including the main winding 112 and the variable speed winding 114, with one side connected to a common position 116 and the other side connected to a common position 116.

[0030] The output wiring 40 includes a strong operation output wiring 40a connected to a position 117 including only the auxiliary winding 111 of the ventilation fan 42, a weak operation output wiring 40b connected to a position 118 including the auxiliary winding 111 and the variable speed winding 114 of the ventilation fan 42, and a common wiring 40c connected to a common position 116. When a strong operation command is issued, the power supply unit 8 applies 100V AC power between the strong operation output wiring 40a and the common wiring 40c, and performs strong operation by passing a current through the main winding 112 and the auxiliary winding 111. When a weak operation command is issued, the power supply unit 8 applies 100V AC power between the weak operation output wiring 40b and the common wiring 40c, and performs weak operation by passing a current through the main winding 112, the auxiliary winding 111, and the variable speed winding 114.

[0031] Next, a detailed structure of the power supply unit 8 will be described. Fig. 10 is a schematic diagram of the power supply unit of the switch according to the first embodiment. The power supply unit 8 has a power input line 81, an output wiring 40, an input unit 84, a DC low-voltage power supply output wiring 85, a first relay 90 which is a main relay, a second relay 91 which is a bypass relay connected in series to the first relay 90, a bypass resistor 92 connected in parallel to the second relay 91, and a third relay 94 which is a strong / weak relay connected in series to the first relay 90 and the second relay 91.

[0032] The input unit 84 receives AC power from an external power source 86, converts a portion of it into low-voltage DC power, supplies it to the control unit 5 via the low-voltage DC power supply output wiring 85, and outputs a portion of it from the output wiring 40 to the motor circuit 41 as load power.

[0033] A first signal line 121 for controlling opening and closing is connected to the first relay 90 from the control unit 5. When the first signal line 121 is on, the first relay 90 is in a closed state, i.e., a conductive state. When the first signal line 121 is off, the first relay 90 is in an open state, i.e., a cut-off state. A second signal line 122 for controlling opening and closing is connected to the second relay 91 from the control unit 5. When the second signal line 122 is on, the second relay 91 is in a closed state, i.e., a conductive state. When the second signal line 122 is off, the second relay 91 is in an open state, i.e., a cut-off state. A third signal line 123 for controlling opening and closing is connected to the third relay 94 from the control unit 5. When the third signal line 123 is on, the third relay 94 is in a closed state, i.e., a conductive state. When the third signal line 123 is off, the third relay 94 is in an open state, i.e., a cut-off state.

[0034] The operation of the first relay 90 and the second relay 91 will be described. Fig. 11 is a diagram showing signal waveforms of the switch according to the first embodiment. In Fig. 11, the command state by the on / off switching operation of the first operating handle 51 for the ventilation fan 42 is shown in "on / off signal". The on / off signal is at a high level when instructing to turn on the ventilation fan 42, and is at a low level when instructing to turn off the ventilation fan 42. An instruction to turn on the ventilation fan 42 is given at time T1, and an instruction to turn off the ventilation fan 42 is given at time T4.

[0035] The "on / off signal" is input to the control unit 5, and a command signal is output to the first relay 90 and the second relay 91. When an instruction to turn on the ventilation fan 42 is given at time T1, the second relay 91 is in a closed state, i.e., a conductive state. When the "on / off signal" changes to give an instruction to turn on the ventilation fan 42 at time T1, the second relay signal is turned off from time T1 to time T3, and returns to on after time T3.

[0036] The first relay 90 is closed at time T2 between time T1 and time T3. That is, the first relay 90 is closed while the second relay 91 is open.

[0037] At the moment the first relay 90 is closed, the second relay 91 is open, so that the current flows only through the bypass resistor 92. At the moment the first relay 90 is closed, an inrush current flows, but since the voltage drops due to the bypass resistor 92, the voltage applied to the motor circuit 41 also drops, so that the effect of the inrush current on the motor circuit 41 can be reduced.

[0038] By closing the second relay 91 at time T3 after the convergence of the inrush current, it is possible to prevent power consumption by the bypass resistor 92 from time T3 onwards.

[0039] Between time T2 and time T3, current flows through bypass resistor 92, but the current is suppressed to about 1 / 10. Therefore, the time from time T2 to time T3 should be about 10 times the AC period. In other words, the bypass time should be on the order of 10 msec to 100 msec.

[0040] The same is true when the switch is turned off. When the "on / off signal" changes to instruct the ventilation fan 42 to be turned off at time T4, the second relay signal is turned off from time T4 to time T6, and then returns to on after time T6.

[0041] The first relay 90 is opened at a time T5 between the time T4 and the time T6. That is, the first relay 90 is opened in a state in which the second relay 91 is open.

[0042] At the moment when the first relay 90 is opened, the second relay 91 is also opened, so that the current flows only through the bypass resistor 92. At the moment when the first relay 90 is opened, switching noise occurs, but since the voltage is dropped by the bypass resistor 92, the effect on the electronic circuit can be reduced.

[0043] Fig. 12 is a diagram showing the configuration of a motor circuit to which load driving power is supplied from the switch according to embodiment 1. Fig. 12 shows the configuration of a motor circuit 41 when a DC motor is used. Motor circuit 41 of the DC motor includes a detection unit 250, a rectification unit 210, a smoothing unit 220, a switching unit 230, and a motor winding unit 240.

[0044] The detection unit 250 detects whether the input from the switch 100 has been received from the strong terminal or the weak terminal, and outputs the result to the switching control unit 231.

[0045] The rectifier 210 converts the negative voltage component of the input voltage into a positive voltage by full-wave rectification using a diode bridge circuit 211, and converts the AC power into a pulsating DC power.

[0046] The smoothing unit 220 smoothes the pulsating voltage by using a smoothing capacitor 221 .

[0047] The switching unit 230 sequentially switches the supply of power to the stator motor winding unit 240 by sequentially switching the switching elements, thereby applying a rotating magnetic field to the motor. As a switching control method, for example, the rotor is a magnet rotor, a Hall element is provided on the stator side to detect the rotation angle of the rotor, and the switching elements are sequentially switched according to the rotation angle in the switching control unit 231. In addition, the switching control unit 231 receives a signal from the detection unit 250 indicating whether strong or weak has been selected, and controls strong / weak operation.

[0048] The motor windings 240 are wound around the stator and generate a rotating magnetic field by switching the current in sequence.

[0049] When the power supply is turned off, the charge in the smoothing capacitor 221 is discharged, so when the power supply is turned on, the smoothing capacitor 221 must first be charged, which causes an inrush current. That is, in a DC motor that uses the smoothing capacitor 221, the inrush current becomes large.

[0050] In the switch 100 according to the first embodiment, low-voltage DC power is supplied from the input unit 84 to the control unit 5, but when a large inrush current flows, fluctuating noise also occurs in the power supply to the control unit 5. The communication unit 6 is particularly susceptible to the effects of noise, but the switch 100 according to the first embodiment can suppress the inrush current, thereby suppressing malfunction of the communication unit 6 due to noise.

[0051] In addition, in the case of a wall-mounted switch, the overall size is fixed, but when a communication unit is provided to use a communication function, it is required to suppress the size of the relay unit in order to maintain the overall size of the switch. In a conventional switch, even for a rated current of less than 10 A, an inrush current flows that is about 10 times the rated current. In contrast, in the switch 100 according to the first embodiment, the inrush current passes through the bypass resistor 92, and by using the bypass resistor 92 with an electrical resistance of about 10 Ω to 100 Ω, the inrush current can be suppressed to the same level as the rated current. Therefore, the switch 100 according to the first embodiment can reduce the inrush current generated during an on / off switching operation without increasing the size of components such as the relay unit.

[0052] Embodiment 2 The configuration of the switch 100 according to the second embodiment is the same as that of the switch 100 according to the first embodiment. FIG. 13 is a diagram showing signal waveforms of the switch according to the second embodiment. The second operating handle 52 accepts an operation to switch the connection destination of the power input line 81. The connection destination of the power input line 81 is switched by operating the second operating handle 52, and the strength of the operation strength of the ventilation fan 42 is changed. In FIG. 13, the command state by the operation of the second operating handle 52 is shown in "Strength / Weakness Signal". The strength / weakness signal is at a high level when instructing the ventilation fan 42 to operate at a high level, and is at a low level when instructing the ventilation fan 42 to operate at a low level. At time T11, a signal to set the operation strength of the ventilation fan 42 to high is output, and at time T14, a signal to set the operation strength of the ventilation fan 42 to low is output.

[0053] By operating the second operating handle 52, a "strong / weak signal" is input to the control unit 5, and a command signal is output to the second relay 91 and the third relay 94. When a weak signal is output, the second relay 91 is in a closed state, i.e., a conductive state. When the "strong / weak signal" becomes strong at time T11 due to a strong command, the second relay signal is turned off from time T11 to time T13, and then returns to on after time T13.

[0054] The third relay 94 is closed at a time T12 between the times T11 and T13, that is, the third relay 94 is switched with the second relay 91 in an open state.

[0055] At the moment that the third relay 94 is closed, the second relay 91 is open, so that the current flows only through the bypass resistor 92. At the moment that the third relay 94 is closed and the strong and weak output wiring is switched, an inrush current flows, but since the voltage drops due to the bypass resistor 92, the voltage applied to the motor circuit 41 also drops, so that the effect of the inrush current on the motor circuit 41 can be reduced.

[0056] By closing the third relay 94 at time T13 after the convergence of the inrush current, it is possible to prevent power consumption by the bypass resistor 92 from time T13 onwards.

[0057] The same is true when a weak command is issued. When the "strong / weak signal" becomes weak at time T14, the second relay signal is turned off from time T14 to time T16, and is turned back on after time T16.

[0058] The third relay 94 is opened at a timing T15 between the times T14 and T16. That is, the third relay 94 is switched while the second relay 91 is in an open state.

[0059] At the moment the third relay 94 is opened, the second relay 91 is also open, so that a current flows only through the bypass resistor 92. At the moment the third relay 94 is opened, an inrush current flows in the same way as at the moment the third relay 94 is closed, but since the voltage drops due to the bypass resistor 92, the voltage applied to the motor circuit 41 also drops, and the effect of the inrush current on the motor circuit 41 can be reduced.

[0060] In the switch 100 according to the second embodiment, the inrush current passes through the bypass resistor 92, and by using the bypass resistor 92 having an electrical resistance of about 10 Ω to 100 Ω, the inrush current can be suppressed to the same level as the rated current. Therefore, the switch 100 according to the second embodiment can reduce the inrush current generated when switching the connection destination of the power supply input line 81, without increasing the size of components such as a relay unit.

[0061] Next, a description will be given of the hardware configuration of the control unit 5 included in the switch 100 according to the above-mentioned embodiment 1 and embodiment 2. Fig. 14 is a diagram showing an example of the hardware configuration of the control unit of the switch according to embodiment 1 and embodiment 2. Fig. 14 shows a hardware configuration in the case where the function of the control unit 5 is realized by using hardware that executes a program.

[0062] The control unit 5 has a processor 71 that executes various processes, a memory 72 that is a main memory, and a storage device 73 that stores information. The processor 71 may be a calculation means such as an arithmetic device, a microprocessor, a microcomputer, a CPU (Central Processing Unit), or a DSP (Digital Signal Processor). The memory 72 may be a non-volatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Memory), or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage device 73 stores a program for executing the ventilation air volume determination process. The processor 71 reads the program stored in the storage device 73 into the memory 72 and executes it. The processor 71 reads the program stored in the storage device 73 into the memory 72 and executes it, thereby realizing the function of the control unit 5.

[0063] The configurations shown in the above embodiments are merely examples of the contents, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention. [Explanation of symbols]

[0064] 1 Operating handle section, 2 Cover, 3 Mounting frame, 3a Mounting hole, 4 Operating switch, 4a Switch transmission section, 5 Control section, 6 Communication section, 7 Protective cover, 8 Power supply section, 9 Unit cover, 10 Wiring box, 20 Unit, 21 Terminal block, 30 Design section, 40 Output wiring, 40a Output wiring for strong operation, 40b Output wiring for weak operation, 40c Common wiring, 41 Motor circuit, 42 Ventilator, 50 Control wiring, 51 First operating handle, 52 Second operating handle, 53 Display section, 60 Communication wiring, 61 Router, 62 Server, 63 Network, 64 User terminal, 65 Wireless signal, 71 Processor, 72 Memory, 73 Storage device, 81 Power input line, 82 Power input terminal, 83 Output terminal, 84 Input section, 85 DC low voltage power output wiring, 86 External power supply, 90 First relay, 91, second relay, 92, bypass resistor, 94, third relay, 100, switch, 110, wall, 111, auxiliary winding, 112, main winding, 113, capacitor, 114, variable speed winding, 116, common position, 117, 118, position, 121, first signal line, 122, second signal line, 123, third signal line, 200, ventilation system, 210, rectifier section, 211, diode bridge circuit, 220, smoothing section, 221, smoothing capacitor, 230, switching section, 231, switching control section, 240, motor winding section, 250, detection section.

Claims

1. An operating handle section installed on the front, a control unit that generates an output command signal based on an operation of the operating handle unit; a power supply unit including a first relay that switches between connection and disconnection of a power supply input line, a second relay that is connected in series with the first relay, and a bypass resistor that is connected in parallel with the second relay, the power supply unit receiving power from an external power supply and supplying power to an external load based on the output command signal; the control unit, when a switching operation is performed on the operating handle unit to switch the power input line from disconnected to connected, opens the second relay for a preset period of time and closes the first relay while the second relay is open, and, when a switching operation is performed on the operating handle unit to switch the power input line from connected to disconnected, opens the second relay for a preset period of time and opens the first relay while the second relay is open.

2. An operating handle portion installed on the front side; a control unit that generates an output command signal based on an operation of the operating handle unit; a power supply unit including a first relay that switches between connection and disconnection of a power supply input line, a second relay that is connected in series with the first relay, and a bypass resistor that is connected in parallel with the second relay, the power supply unit receiving power from an external power supply and supplying power to an external load based on the output command signal; When a switching operation for switching the power supply input line from disconnected to connected is performed on the operating handle portion, the control unit opens the second relay for a preset period and closes the first relay while the second relay is open, the power supply unit includes a third relay that is connected in series to the first relay and the second relay and that switches a connection destination of the power supply input line; a control unit that opens the second relay for a predetermined period of time when an operation for switching the connection destination of the power supply input line is performed on the operating handle unit, and controls switching of the connection destination of the third relay while the second relay is open.

3. An operating handle portion installed on the front side; a control unit that generates an output command signal based on an operation of the operating handle unit; a power supply unit including a first relay that switches between connection and disconnection of a power supply input line, a second relay that is connected in series with the first relay, and a bypass resistor that is connected in parallel with the second relay, the power supply unit receiving power from an external power supply and supplying power to an external load based on the output command signal; It is for controlling the ventilation fan. When a switching operation is performed on the operating handle portion to switch the power input line from disconnected to connected, the control unit opens the second relay for a predetermined period of time and closes the first relay while the second relay is open.

4. A motor circuit is provided that converts AC power into DC power to drive a DC motor. The switch according to claim 3, wherein the motor circuit has a smoothing capacitor that smoothes a pulsating voltage, and when a switching operation is performed to switch the power supply input line from disconnected to connected, the switch opens the second relay for a preset period and closes the first relay while the second relay is open, thereby suppressing an inrush current generated when the smoothing capacitor is charged.

5. 5. The switch according to claim 1, wherein the period during which the second relay is opened is variable.

6. A control method for a switch having an operating handle section provided on a front surface, a control section which generates an output command signal based on an operation of the operating handle section, a power supply section which has a first relay which switches between connection and disconnection of a power supply input line, a second relay which is connected in series to the first relay, and a bypass resistor which is connected in parallel to the second relay, and which receives power from an external power supply and supplies power to an external load based on the output command signal, a step of opening the second relay by the control unit in response to a switching operation for switching the power input line for the operating handle unit from disconnected to connected; the control unit closing the first relay while the second relay is open; the control unit closing the second relay; a step of opening the second relay by the control unit in response to a switching operation of switching the power input line for the operating handle unit from a connected state to a disconnected state; the control unit opening the first relay while the second relay is open; and (c) closing the second relay by the control unit.

7. A control method for a switch having a power supply unit including an operating handle unit provided on a front surface, a control unit that generates an output command signal based on an operation of the operating handle unit, a first relay that switches between connection and disconnection of a power supply input line, a second relay connected in series with the first relay, a bypass resistor connected in parallel with the second relay, and a third relay connected in series with the second relay that switches a connection destination of the power supply input line, the power supply unit receiving power from an external power supply and supplying power to an external load based on the output command signal, a step of opening the second relay by the control unit in response to a switching operation of a connection destination of the power supply input line with respect to the operating handle unit; the control unit switching the third relay while the second relay is open; and (c) closing the second relay by the control unit.

8. A method for controlling a switch for a ventilation fan, the switch having an operating handle section installed on a front side, a control section for generating an output command signal based on an operation on the operating handle section, a first relay for switching between connection and disconnection of a power supply input line, a second relay connected in series to the first relay, and a bypass resistor connected in parallel to the second relay, the power supply section receiving power from an external power source and supplying power to an external load based on the output command signal, comprising: a step of opening the second relay by the control unit in response to a switching operation for switching the power input line for the operating handle unit from disconnected to connected; the control unit closing the first relay while the second relay is open; and a step of the control unit closing the second relay.

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