Heating regulator

Abstract

To provide a heating cooker for inhibiting rush current from flowing to a relay.SOLUTION: A heating cooker 1 includes a door 3, a relay 10, a switch 7, an ON / OFF detection part 60, and a control part 6. The door 3 opens or closes a heating chamber 2a. The relay 10 makes AC power an energization state when the door 3 opens the heating chamber 2a, and makes the AC power a non-energization state when the door 3 closes the heating chamber 2a. The switch 7 becomes an OFF state when the door 3 opens the heating chamber 2a, and becomes an ON state when the door 3 closes the heating chamber 2a. The ON / OFF detection part 60 detects the ON state or the OFF state of the switch 7 and outputs switch information. The control part 6 further makes the relay 10 an energization state on the basis that the switch information continuously shows the OFF state after showing that the switch information is the OFF state.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a cooking device. [Background technology]

[0002] Patent Document 1 discloses an electric device that controls the current consumption of an operation control circuit in an operation standby state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-261483 Summary of the Invention [Problem to be solved by the invention]

[0004] However, Patent Document 1 does not disclose the inrush current that flows through the relay coil when the door is opened or closed.

[0005] An object of the present invention is to provide a cooking appliance that suppresses inrush current from flowing to a relay by energizing the relay when a door switch is in the OFF state. [Means for solving the problem]

[0006] The cooking appliance according to the present invention includes a door, a relay, a door switch, an ON / OFF detection unit, and a control unit. The door opens or closes a heating chamber. The relay energizes AC power when the door opens the heating chamber, and deenergizes AC power when the door closes the heating chamber. The door switch turns OFF when the door opens the heating chamber, and turns ON when the door closes the heating chamber. The ON / OFF detection unit detects the ON state or the OFF state of the door switch and outputs switch information. After the switch information indicates the OFF state, the control unit turns the relay to the energized state based on the switch information continuing to indicate the OFF state. [Effects of the Invention]

[0007] According to the cooking device of the present invention, by bringing the relay into a conducting state when the door switch is in an OFF state, it is possible to suppress the flow of inrush current to the relay. [Brief explanation of the drawings]

[0008] [Figure 1A] 1 is a diagram showing a configuration of a heating cooker according to an embodiment of the present invention; [Figure 1B] 1 is a diagram showing a configuration of a heating cooker according to an embodiment of the present invention; [Figure 2A] FIG. 1 is a reference diagram illustrating control of AC current in a typical heating cooker. [Figure 2B] FIG. 1 is a reference diagram illustrating control of AC current in a typical heating cooker. [Figure 2C] FIG. 1 is a reference diagram illustrating control of AC current in a typical heating cooker. [Figure 3] 1 is a block diagram showing a configuration of a cooking device according to an embodiment of the present invention; [Figure 4A] FIG. 4 is a reference diagram illustrating control of AC current in the cooking device according to the present embodiment. [Figure 4B] FIG. 4 is a reference diagram illustrating control of AC current in the cooking device according to the present embodiment. [Figure 4C] FIG. 4 is a reference diagram illustrating control of AC current in the cooking device according to the present embodiment. [Figure 4D] FIG. 4 is a reference diagram illustrating control of AC current in the cooking device according to the present embodiment. [Figure 5A] 4 is a diagram showing the operation of the cooking device according to the present embodiment as viewed from the side. FIG. [Figure 5B] 4 is a diagram showing the operation of the cooking device according to the present embodiment as viewed from the side. FIG. [Figure 5C] 4 is a diagram showing the operation of the cooking device according to the present embodiment as viewed from the side. FIG. [Figure 5D] 4 is a diagram showing the operation of the cooking device according to the present embodiment as viewed from the side. FIG. [Figure 6] 4 is a time chart showing control of the cooking device according to the present embodiment. [Figure 7] 4 is a flowchart showing control of the cooking device according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a cooking device 1 according to this embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts will be given the same reference characters and description thereof will not be repeated.

[0010] First, the configuration of a cooking device 1 according to this embodiment will be described with reference to FIGS. 1A and 1B.

[0011] 1A and 1B are front views of a cooking device 1 according to this embodiment, with Fig. 1A showing a state in which a door 3 (door portion 3) is closed, and Fig. 1B showing a state in which the door 3 is open.

[0012] As shown in FIG. 1A, the cooking appliance 1 includes a casing 2, a door 3 (door portion 3), a magnetron M, a handle 4, a display operation portion 5, a circuit housing portion 6 (control portion 6), a switch 7, and a rotating portion 12.

[0013] The casing 2 includes a heating chamber 2a.

[0014] The door 3 includes a window 3a and a frame 3b.

[0015] The switch 7 includes a first switch 70 and a second switch 71 .

[0016] The cooking device 1 is a cooking device that performs microwave cooking as cooking. The cooking device 1 may have an oven cooking function in addition to the microwave cooking function.

[0017] The cooking method of the cooking device 1 includes a microwave oven method using a magnetron M and a steam heating method.

[0018] 1B, the casing 2 may be, for example, a rectangular parallelepiped shape. The space surrounded by the casing 2 serves as a heating chamber 2a for accommodating an object to be heated.

[0019] The magnetron M generates microwaves. The magnetron M irradiates the microwaves onto an object to be heated housed in the heating chamber 2a, thereby heating the object. The magnetron M is disposed inside the casing 2 (for example, on the opposite side of the door 3 across the heating chamber 2a).

[0020] A window 3a (window portion 3a) of the door 3 is disposed in a position facing the heating chamber 2a. A frame 3b (frame portion 3b) of the door 3 surrounds the window 3a. Heat-resistant glass or heat-resistant transparent resin is fitted into the window 3a so that the heating chamber 2a can be seen through.

[0021] The frame 3b is formed from a non-metallic material, for example, resin. The door 3 opens and closes the heating chamber 2a. That is, the door 3 is rotatably connected to the heating chamber 2a by a pivoting part 12. The door 3 rotates by the pivoting part 12 approximately around the edge of its lower end, and a handle 4 is attached to the upper side as a user aid for opening and closing the door 3. In this embodiment, the door 3 is opened and closed by rotating the pivoting part 12 approximately around the edge of the lower end of the door 3, but this is not limited thereto. For example, the door 3 may be opened and closed by rotating the pivoting part 12 around the edge of the left or right end of the door 3.

[0022] Furthermore, a shielding material having a size sufficient to cover the entrance of the heating chamber 2a is formed on the surface of the door 3 facing the heating chamber 2a.

[0023] The display operation unit 5 displays various information related to the cooking appliance 1 and accepts operations for the cooking appliance 1. The display operation unit 5 may be configured as a touch panel, for example. The display operation unit 5 may also be provided with a dial or buttons.

[0024] The drive circuit of the display / operation unit 5 is housed in a circuit housing 6 (control unit 6). The circuit housing 6 is provided with a cooling fan (not shown) to reduce the temperature in order to reduce the effects of heat generated during cooking. The circuit housing 6 may be formed as part of the interior of the frame 3b of the door 3, as shown in FIG. 1. In this embodiment, the display / operation unit 5 may be formed integrally with the door 3. Alternatively, the circuit housing 6 may be formed integrally with the door 3.

[0025] Furthermore, in the cooking appliance 1, an installation space for installing a wireless communication adapter (wireless communication device) (not shown) for communicating with the outside may be provided inside the frame 3b or in the circuit housing section 6.

[0026] The door 3 and the display / operation unit 5 may be made of a non-metallic material.

[0027] Generally, in a cooking appliance equipped with a magnetron M, the door 3 and the display / operation unit 5 are covered with a non-metallic material to prevent a rise in temperature because the user directly touches them. Therefore, the frame 3b of the door 3 may be formed from a non-metallic material. The circuit housing 6 that houses the drive circuit of the display / operation unit 5 is formed from a non-metallic material, which is a common configuration of a cooking appliance 1 equipped with a magnetron M. Therefore, the cooking appliance 1 can have an installation space for a wireless communication adapter in a position covered with a non-metallic member without adding any special configuration to the common configuration of a cooking appliance 1 equipped with a magnetron M or changing the structure.

[0028] Although the above description has been given of a cooking appliance 1 equipped with a magnetron M, the configuration in which the wireless communication adapter is installed inside the frame 3b of the door 3 or in the circuit storage section 6 of the display operation section 5 can also be applied to cooking appliances 1 that do not have a magnetron M, such as ovens and toaster ovens.

[0029] Switch 7 is turned OFF when door 3 opens heating chamber 2a, and turned ON when door 3 closes heating chamber 2a. Specifically, switch 7 is arranged so that it can be exposed to and retracted from a hole formed in the side of casing 2 facing door 3. Switch 7 is biased by an elastic member such as a spring (not shown) arranged inside casing 2.

[0030] When the door 3 closes the heating chamber 2a, the switch 7 is biased by the door 3 to sink into the inside of the casing 2 and output switch information. When the switch 7 sinks into the inside of the casing 2, an ON / OFF detection unit 60 (FIG. 3), which will be described later, detects that the door 3 has closed the heating chamber 2a based on the switch information and outputs detection information.

[0031] When the door 3 opens the heating chamber 2a, the switch 7 is released from the bias of the door 3 and is exposed to the outside of the casing 2, outputting switch information. When the switch 7 is exposed to the outside of the casing 2, the ON / OFF detection unit 60 (Fig. 3) detects that the door 3 has opened the heating chamber 2a based on the switch information, and outputs detection information.

[0032] Next, the control of AC current in a general cooking device will be described with reference to Figs. 2A to 2C. Figs. 2A to 2C are reference diagrams for explaining the control of AC current in a general cooking device. Figs. 2A to 2C explain the control of AC current in a general cooking device as an introduction for explaining embodiments relating to AC current in cooking device 1 according to the present invention. Therefore, cooking device 1 according to the present invention should not be interpreted in any way as being limited by the matters explained in Figs. 2A to 2C.

[0033] The control circuit shown in FIG. 2A includes a control board, switches (SW1, SW2), an AC terminal (AC: Alternating Current), a relay unit, and a capacitive element.

[0034] The control board includes a power supply circuit.

[0035] The switch has SW1, SW2, a first closed terminal, an open terminal, and a second closed terminal.

[0036] The relay unit includes a relay and a third close terminal.

[0037] As explained in Figure 1B, when the door is opened and separated from the casing, the switch is in the OFF state. As shown in Figure 2A, when the switch is in the OFF state, SW1 is in the OFF state and SW2 is connected to the open terminal.

[0038] The AC current supplied from the AC terminal charges the capacitance element via SW2 as shown by the arrow, and at the same time, is passed through the power supply circuit of the control board.

[0039] The power supply circuit receives AC current and detects that SW2 is connected to the open terminal due to SW1 being open. The power supply circuit then supplies a control current to the relay unit, attempting to connect the relay to the third close terminal.

[0040] However, after the user opens the door as shown in Figure 2A, the user may immediately close the door for some reason as shown in Figure 2B. In this case, SW1 and SW2 may close before the power supply circuit connects the relay of the relay unit to the third close terminal.

[0041] As shown in Fig. 2C, when SW1 and SW2 are closed, the AC current is disconnected from the control board. Furthermore, if the power supply circuit supplies a control current to the relay unit after SW1 and SW2 are closed and the relay is connected to the third close terminal, the AC current will flow into the relay unit from the AC terminal as an inrush current, which may cause the relay to melt.

[0042] Next, the control of AC current in the cooking device 1 according to this embodiment will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a block diagram showing the configuration of the cooking device 1 according to this embodiment. Figs. 4A to 4D are reference diagrams for explaining the control of AC current in the cooking device according to this embodiment.

[0043] The control circuit shown in the block diagram of FIG. 3 and in FIGS. 4A to 4D includes a control unit 6, a switch 7, an AC terminal 8, a resistive element 9, a relay unit 10, and a capacitive element 11.

[0044] The control unit 6 includes an ON / OFF detection unit 60, a determination unit 61, a relay control unit 62, and a power supply unit 63.

[0045] The switch 7 has a first switch 70, a second switch 71, a first closed terminal 72, an open terminal 73, and a second closed terminal 74.

[0046] The relay unit 10 includes a relay 100 and a third closed terminal 101 .

[0047] When the door 3 opens the heating chamber 2a, the relay 100 energizes the AC power by the AC current I1, and when the door 3 closes the heating chamber 2a, the relay 100 cuts off the AC current I1 and deenergizes the AC power.

[0048] The ON / OFF detection unit 60 detects whether the switch 7 is in an ON state or an OFF state, and outputs the detection information.

[0049] As explained in FIG. 1B, when the door 3 opens and moves away from the casing 2, the switch 7 is turned OFF and switch information is output. At this time, as shown in FIG. 4A, the second switch 71 is switched from the second close terminal 74 to the open terminal 73 and switch information is output. The first switch 70 is disconnected from the first close terminal 72 and is turned OFF and switch information is output. It may also be stated that at this time, the switch 7 is turned OFF and switch information is output.

[0050] The ON / OFF detection unit 60 detects the OFF state of the switch 7 based on the switch information and outputs the detection information. The detection information indicates that the switch 7 is in the OFF state.

[0051] The determination unit 61 shown in FIG. 3 may determine that the switch 7 is in the OFF state based on detection information indicating that the ON / OFF detection unit 60 has detected the OFF state of the switch 7, and output determination information.

[0052] As shown in FIG. 4A, AC current I1 supplied from AC terminal 8 charges capacitive element 11 via second switch 71 as indicated by the arrow, and simultaneously energizes control unit 6.

[0053] The ON / OFF detection unit 60 receives the AC current I1, detects that the first switch 70 has been opened, causing the second switch 71 to be connected to the open terminal 73, and outputs detection information. The relay control unit 62 attempts to connect the relay 100 of the relay unit 10 to the third closed terminal 101.

[0054] However, after the user opens the door 3 as described in Fig. 4A, there are cases where the user immediately closes the door 3 for some reason as shown in Fig. 4B. In this case, the first switch 70 and the second switch 71 may be closed before the relay control unit 62 connects the relay 100 of the relay unit 10 to the third close terminal 101.

[0055] The relay control unit 62 of the cooking appliance 1 according to this embodiment does not connect the relay 100 to the third closed terminal 101 just by detecting that the second switch 71 is connected to the open terminal 73. In other words, the power supply unit 63 does not supply the control current I2 to the relay unit 10 just by detecting that the second switch 71 is connected to the open terminal 73.

[0056] After the detection information output by the ON / OFF detection unit 60 indicates an OFF state, the control unit 6 places the relay 100 in an energized state based on the fact that the detection information continues to indicate an OFF state.

[0057] That is, as shown in FIG. 4C, when it is detected that the second switch 71 is connected to the open terminal 73, the ON / OFF detection unit 60 detects that the second switch 71 continues to be connected to the open terminal 73 and outputs detection information.

[0058] The determination unit 61 may determine, based on the detection information, that the second switch 71 continues to be connected to the open terminal 73, and output determination information.

[0059] As shown in FIG. 4D, the relay control unit 62 connects the relay 100 to the third closed terminal 101 based on detection information indicating that the ON / OFF detection unit 60 has detected that the second switch 71 is continuously connected to the open terminal 73.

[0060] The relay control unit 62 may connect the relay 100 to the third close terminal 101 based on judgment information indicating that the judgment unit 61 has determined that the second switch 71 is continuously connected to the open terminal 73.

[0061] In this case, the AC current I1 charges the capacitance element 11 from the AC terminal 8 via the second switch 71 connected to the open terminal 73, and simultaneously energizes the control unit 6.

[0062] Therefore, the inrush current of the AC current I1 flowing through the relay 100 of the relay unit 10 is suppressed to a smaller value than in the reference example described with reference to FIGS. 2A to 2C, and welding of the relay 100 is suppressed.

[0063] According to this embodiment, the inrush current flowing through the relay 100 is suppressed, and welding of the relay 100 is suppressed.

[0064] In this case, the resistive element 9 may be disposed on the wiring extending in series from the AC terminal 8 to the relay unit 10. In other words, the resistive element 9 may be connected in series from the AC terminal 8 to the relay unit 10. The resistive element 9 reduces the current value of the inrush current flowing through the relay 100.

[0065] According to this embodiment, the inrush current flowing through the relay 100 is further suppressed, and welding of the relay 100 is more effectively suppressed.

[0066] Next, the control of the AC current I1 of the cooking device 1 will be described in more detail with reference to Figures 5A to 6. Figures 5A to 5D are operational diagrams of the cooking device 1 according to this embodiment as viewed from the side. Figure 6 is a time chart showing the control of the cooking device 1 according to this embodiment.

[0067] As already described with reference to FIG. 3, the switch 7 includes a first switch 70 and a second switch 71.

[0068] As shown in FIG. 5A, the second switch 71 is disposed at a position farther from the first switch 70 than the rotating portion 12 is.

[0069] 5A, the second switch 71 operates earlier than the first switch 70 when the door 3 is opened. That is, the second switch 71 transitions from the ON state to the OFF state earlier than the first switch 70 when the door 3 is opened.

[0070] As shown in FIG. 5B, when the door 3 is further opened, the first switch 70 transitions from the ON state to the OFF state, following the second switch 71.

[0071] 5C, when the door 3 is closed, the first switch 70 operates earlier than the second switch 71. That is, when the door 3 is closed, the first switch 70 transitions from the OFF state to the ON state earlier than the second switch 71.

[0072] As shown in FIG. 5D, when the door 3 is further closed, the second switch 71 transitions from the OFF state to the ON state following the first switch 70.

[0073] Next, the relationship between the transition of the ON / OFF state of the first switch 70 and the second switch 71 described in Figures 4A to 4D and Figures 5A to 5D and the operation of the relay unit 10 will be described with reference to the time chart of Figure 6.

[0074] As shown in Fig. 5A, when the door 3 is opened from a closed state, the door 3 separates from the second switch 71 at timing A shown in Fig. 6. As shown in Fig. 4A, the second switch 71 separates from the second close terminal 74 and connects to the open terminal 73.

[0075] The ON / OFF detection unit 60 detects whether the first switch 70 and the second switch 71 are in an ON state or an OFF state, and outputs switch information.

[0076] That is, the ON / OFF detection unit 60 outputs detection information based on switch information indicating that the second switch 71 has transitioned from the ON state to the OFF state at timing A shown in FIG.

[0077] As shown in Fig. 5B, when the door 3 is further opened, the door 3 is released from the first switch 70 at timing B shown in Fig. 6, and switch information is output. As shown in Fig. 4A, the first switch 70 releases the first close terminal 72 and outputs switch information indicating that it has entered the OFF state.

[0078] At timing B, the ON / OFF detection unit 60 outputs detection information based on the switch information indicating that the first switch 70 has been turned OFF.

[0079] After timing B, the ON / OFF detection unit 60 detects that the first switch 70 continues to be in the OFF state based on the switch information.

[0080] The determination unit 61 may determine whether the ON / OFF detection unit 60 has detected that the first switch 70 continues to be in the OFF state even after timing B, based on the detection information, and output determination information.

[0081] The control unit 6 puts the relay 100 into an energized state after the switch information for the second switch 71 has transitioned from an ON state to an OFF state, and further after the switch information for the first switch 70 has transitioned from an ON state to an OFF state, on the condition that the switch information for the first switch 70 has not transitioned from an OFF state to an ON state.

[0082] Specifically, at timing A, the second switch 71 switches from the second closed terminal 74 to the open terminal 73, and the ON / OFF detection unit 60 detects switch information indicating a transition from the ON state to the OFF state and outputs the detection information.

[0083] Furthermore, at timing B, the first switch 70 leaves the first closed terminal 72, and the ON / OFF detection unit 60 detects switch information indicating a transition from the ON state to the OFF state, and outputs the switch information.

[0084] The ON / OFF detection unit 60 detects switch information indicating that the first switch 70 continues to be in the OFF state even after timing B and has not transitioned from the OFF state to the ON state, and outputs the detection information.

[0085] At timing C, the relay control unit 62 controls the power supply unit 63 to supply the control current I2 to the relay unit 10.

[0086] The power supply unit 63 supplies a control current I2 to the relay unit 100 to connect the relay 100 to the third close terminal 101, thereby bringing the relay 100 into a conducting state.

[0087] Next, at timing D, the first switch 70 connects to the first closed terminal 72, and the ON / OFF detection unit 60 detects that the first switch 70 has transitioned from the OFF state to the ON state, and outputs detection information.

[0088] After timing D, the relay control unit 62 and the power supply unit 63 do not need to connect the relay 100 to the third closed terminal 101 to bring the relay 100 into a conducting state.

[0089] Furthermore, at timing E, when the second switch 71 leaves the open terminal 73 and connects to the second closed terminal 74, the ON / OFF detection unit 60 detects that the second switch 71 has transitioned from the OFF state to the ON state and outputs detection information.

[0090] After timing E, the relay control unit 62 and the power supply unit 63 do not need to connect the relay 100 to the third closed terminal 101 to bring the relay 100 into a conducting state.

[0091] According to this embodiment, the inrush current flowing through the relay 100 is suppressed, and welding of the relay 100 is suppressed.

[0092] Next, the control of the cooking device 1 according to this embodiment will be described with reference to Fig. 7. Fig. 7 is a flowchart showing the control of the cooking device 1 according to this embodiment.

[0093] 7, the flowchart includes steps S10 to S13. Specifically, the steps are as follows.

[0094] In step S10 shown in FIG. 7, the ON / OFF detection unit 60 detects that the first switch 70 has turned OFF (open), and outputs detection information.

[0095] If the first switch 70 is turned OFF (open) (YES), the process proceeds to step S11.

[0096] If the first switch 70 is not in the OFF state (open) (NO), the process repeats step S10.

[0097] If the answer is YES in step S10, then in step S11, the ON / OFF detection unit 60 detects that the first switch 70 has entered the ON state (closed) and outputs detection information.

[0098] If the first switch 70 is not in the ON state (closed) (NO), the process proceeds to step S13.

[0099] If the first switch 70 is turned on (closed) (YES), the process proceeds to step S12.

[0100] If the answer is YES in step S11, in step S12, the relay control unit 62 does not close (does not turn on) the relay 100. Then, the process returns to step S10.

[0101] If NO in step S13, in step S13, relay control unit 62 closes relay 100 (sets relay 100 to the ON state), and the process then ends.

[0102] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments and can be implemented in various forms without departing from the spirit of the present invention. The drawings may show each component mainly in a schematic manner to facilitate understanding. The number of components shown may differ from the actual number for convenience of drawing. Furthermore, the components shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible without substantially departing from the effects of the present invention. [Industrial Applicability]

[0103] The present invention can be used in the field of cooking appliances. [Explanation of symbols]

[0104] 1 Cooker 2 Casing 2a heating cabinet 3 Door (door part) 3a Window 3b frame M Magnetron 4 Handle 5 Display operation section 6 Circuit storage section 60 ON / OFF detection unit 61 Judgment section 62 Relay control section 63 Power supply section 7 Switch 70 First Switch 71 Second Switch 72 First closed terminal 73 Open terminal 74 Second closed terminal 8 AC terminal 9 Resistive elements 10 Relay Section 100 Relay 101 Third closed terminal 11 Capacitor element 12 Rotating part

Claims

1. a door for opening or closing the heating chamber; a relay that energizes AC power when the door opens the heating chamber and deenergizes AC power when the door closes the heating chamber; a switch that is turned off when the door opens the heating chamber and turned on when the door closes the heating chamber; an ON / OFF detection unit that detects the ON state or the OFF state of the switch and outputs detection information; a control unit that, after the detection information indicates the OFF state, brings the relay into the energized state based on the detection information continuing to indicate the OFF state; and Equipped with The switch includes a first switch and a second switch, the first switch is activated earlier than the second switch when the door is closed; The control unit sets the relay to the non-conductive state when the detection information about the first switch transitions from the OFF state to the ON state.

2. The cooking device according to claim 1 , further comprising a resistive element that reduces a current value of an inrush current flowing through the relay.

3. The door is rotatably connected to the heating chamber by a rotating part, the second switch is disposed at a position farther from the first switch than the rotating portion, the ON / OFF detection unit detects the ON state or the OFF state of each of the first switch and the second switch and outputs the detection information; 3. The heating cooker according to claim 1, wherein the control unit switches the relay to the energized state after the detection information for the second switch has transitioned from the ON state to the OFF state, and further after the detection information for the first switch has transitioned from the ON state to the OFF state, the control unit switches the relay to the energized state on the condition that the detection information for the first switch has not transitioned from the OFF state to the ON state.

Images