CN110199158B

CN110199158B - Air conditioner

Info

Publication number: CN110199158B
Application number: CN201780083748.4A
Authority: CN
Inventors: 铃木智则; 泽村充
Original assignee: Toshiba Carrier Corp
Current assignee: Toshiba Carrier Corp
Priority date: 2017-01-17
Filing date: 2017-01-17
Publication date: 2020-11-06
Anticipated expiration: 2037-01-17
Also published as: EP3572737B1; JPWO2018134879A1; EP3572737A4; EP3572737A1; PL3572737T3; WO2018134879A1; JP6745916B2; CN110199158A

Abstract

The invention provides an air conditioner, which can prevent error operation caused by noise when optional components are not installed on the air conditioner body. An air conditioner (1) is provided with: a control unit (8) to which an optional member (10) can be connected, the optional member (10) being provided with a receiving unit (11) that receives a wireless signal (R) transmitted from a remote operation device (6) for operating the air conditioner main body (2), and a switch (12) for operating the air conditioner main body (2), the control unit (8) being provided with: a 1 st terminal (21) to which a signal is input from a receiving unit (11); a 2 nd terminal (22) to which a signal is input from the switch (12); and a processing unit (13) that disables the input of the 2 nd terminal (22) before the signal is input from the receiving unit (11) to the 1 st terminal (21), and enables the input of the 2 nd terminal (22) after the signal is input from the receiving unit (11) to the 1 st terminal (21).

Description

Air conditioner

Technical Field

Embodiments of the present invention relate to an air conditioner.

Background

In a conventional air conditioner, a main body (indoor unit) of the air conditioner installed at a high place such as a ceiling is generally operated by a wired remote controller installed on a wall surface or the like. In addition, when the user does not want to operate the air conditioner through the wired remote controller but wants to operate the air conditioner through the wireless remote controller, the light receiving unit is installed on the air conditioner main body as an optional component, and the light receiving element is provided with a light receiving part for receiving an infrared signal of the wireless remote controller.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2005-265264

Disclosure of Invention

Problems to be solved by the invention

In the light receiving unit as an optional component, a push switch for instructing operation/stop so as to enable at least the light receiving unit to operate/stop is provided in preparation for a situation in which the wireless remote controller should be lost. The button switch instructs stop by pressing (pushing) during operation of the air conditioner, and instructs operation by pressing (pushing) during stop of the air conditioner. That is, the push switch enables the reverse operation (from operation to stop, from stop to operation) of the state of the air conditioner at that time.

However, when the optional components are not mounted on the air conditioner main body, noise may enter the control device of the air conditioner main body from an input terminal provided to be connected to the optional components. This noise causes a problem that the main body of the air conditioner malfunctions. In particular, since the push switch is a normal contact switch, a pulse signal is emitted only once, and therefore, when noise is superimposed on an input terminal of the push switch, there is a possibility that a control device of the air conditioner main body causes an erroneous operation such as switching between operation and stop unintended by a user.

Embodiments of the present invention have been made in view of such circumstances, and an object thereof is to provide an air conditioner capable of preventing malfunction due to noise even when an optional component is not attached to an air conditioner main body.

Means for solving the problems

An air conditioner according to an embodiment of the present invention includes: an air conditioner main body; and a control unit provided in the air conditioner main body, controlling an operation of the air conditioner main body, and being capable of connecting an optional member provided with a receiving unit receiving a wireless signal transmitted from a remote operation device for operating the air conditioner main body and a switch for operating the air conditioner main body, the control unit including: a 1 st terminal to which a signal is input from the reception unit; a 2 nd terminal to which a signal is input from the switch; and a processing unit configured to disable input from the 2 nd terminal before a signal is input from the receiving unit to the 1 st terminal, and enable input from the 2 nd terminal after the signal is input from the receiving unit to the 1 st terminal.

Further, an air conditioner according to an embodiment of the present invention includes a nonvolatile memory provided in the control unit and storing data indicating a valid or invalid state of the 2 nd terminal, and when power supply to the control unit is restarted, the processing unit sets the state of the 2 nd terminal to the same state as before power supply was stopped based on the data of the nonvolatile memory.

In the air conditioner according to the embodiment of the present invention, the nonvolatile memory stores data in which the 2 nd terminal is set to an invalid state in an initial state.

In the air conditioner according to the embodiment of the present invention, the control unit includes a 3 rd terminal to which a wired remote controller can be connected.

In addition, in the air conditioner according to an embodiment of the present invention, the processing unit includes a microprocessor, and includes: a 1 st port connected to the 1 st terminal; and a 2 nd port which is connected to the 2 nd terminal and is switchable to an output port or an input port, and when it is determined that a signal input to the 1 st port is a signal based on reception of the radio signal, the 2 nd port is switched from the output port to the input port, whereby input of the 2 nd terminal is enabled after a signal is input from the receiving unit to the 1 st terminal.

Drawings

Fig. 1 is a diagram showing the configuration of an air conditioner.

Fig. 2 is a circuit diagram showing the control board and the optional board before connection.

Fig. 3 is a circuit diagram showing the control board and the optional board after connection.

Fig. 4 is a flowchart showing the operation process.

Fig. 5 is a flowchart showing the operation process.

Detailed Description

Hereinafter, the present embodiment will be described with reference to the drawings. First, an air conditioner according to the present embodiment will be described with reference to fig. 1 to 5. Reference numeral 1 in fig. 1 denotes an air conditioner for adjusting the indoor air temperature. The air conditioner 1 includes an air conditioner main body 2 as an indoor unit (indoor unit) installed on an indoor ceiling T, and a decorative plate 3 detachably attached to a lower surface of a frame of the air conditioner main body 2. In the present embodiment, a ceiling-embedded air conditioner main body 2 is exemplified. The air conditioner main body 2 may be of any type, such as ceiling-suspended type, wall-mounted type installed at a high place in a room, or upright type installed on a floor.

As shown in fig. 1, the air conditioner main body 2 includes a heat exchanger 4 and a blower 5 disposed inside the casing thereof. The air conditioner main body 2 as an indoor unit is connected to an outdoor unit installed outdoors via a connection pipe through which a refrigerant circulates. A refrigeration cycle is configured by circulating a refrigerant between the air conditioner main body 2 and the outdoor unit.

As a remote operation device for transmitting a wireless signal, at least one of a wireless remote controller (remote operation device) 6 for transmitting an infrared signal R and a wired remote controller 7 provided on a wall surface in a room is used to remotely operate the air conditioner main body 2. The wired remote controller 7 is connected to the air conditioner main body 2 by a wire, and is attached to a wall surface or the like near the air conditioner main body 2.

Further, a wired remote controller is used as a standard component of the air conditioner 1, but the air conditioner main body 2 may be connected to the wireless remote controller 6 according to a request of a customer. Further, the wireless remote controller 6 and the wired remote controller 7 can be made to coexist, but the operation contents in the wired remote controller 7 cannot be displayed on the display unit of the wireless remote controller 6, which is inconvenient. Therefore, only one of them is generally used.

The air conditioner main body 2 is provided with a control board 8 (control unit) that controls the operation of the heat exchanger 4 and the blower 5. The control board 8 is a shared board so as to be compatible with either an operation by the wireless remote controller 6 or an operation by the wired remote controller 7.

When the customer desires to perform an operation by the wireless remote control 6, the optional component 9 is attached to the air conditioner main body 2. The optional member 9 is provided with an optional board 10 for receiving the infrared signal R transmitted from the wireless remote controller 6. The optional member 9 of the present embodiment is provided integrally with the decorative panel 3. The optional member 9 is detachably attached to the air conditioner main body 2 via the decorative plate 3.

In addition, as the decorative panel 3, two kinds of panels, a panel provided with the option member 9 and a standard member not provided with the option member 9, are prepared. When the customer does not want to perform the operation by the wireless remote controller 6, the standard decorative panel 3 without the optional member 9 is attached to the air conditioner main body 2. That is, the air conditioner main body 2 is one type without modification, and thus is easy to manufacture. Then, the decorative panel 3 corresponding to the customer's desire is selectively attached to the air conditioner main body 2.

When the customer desires to perform an operation by the wired remote controller 7, the wired remote controller 7 is installed at the time of installation of the air conditioner main body 2. In the embodiment shown in fig. 1, the air conditioner 1 provided with both the option unit 9 (the 1 st unit) and the wired remote controller 7 (the 2 nd unit) is illustrated for easy understanding. That is, in the present embodiment, both the operation by the wireless remote controller 6 and the operation by the wired remote controller 7 can be performed.

As shown in fig. 2, a receiving unit 11 (light receiving unit) and a push switch 12 are provided on the optional board 10, and the receiving unit 11 includes circuit components such as a photodiode that receives an infrared signal R (infrared light) which is a wireless signal transmitted from the wired remote controller 7. The push switch 12 is provided for manually operating the air conditioner main body 2 when the wireless remote controller 6 is lost. The push switch 12 is disposed in the vicinity of the receiving portion 11 in the option member 9. When receiving the infrared signal R, the receiving unit 11 converts the signal into an electric signal and outputs the electric signal.

When the push switch 12 is operated during the operation of the air conditioner main body 2, the operation is stopped. When the push switch 12 is operated while the air conditioner main body 2 is stopped, the operation is started. That is, the on/off operation of the air conditioner main body 2 (the heat exchanger 4 and the blower 5) can be performed using the push switch 12.

A microprocessor 13 (processing unit) that executes control processing related to the operation of the air conditioner main body 2, a nonvolatile memory 14 that stores various programs, data, flags, and the like are mounted on the control board 8 built in the air conditioner main body 2, and are connected by a wiring pattern provided on the board. The nonvolatile memory 14 is electrically connected to the microprocessor 13 through such a wiring pattern.

The nonvolatile memory 14 is a memory capable of writing and reading data, and is configured by an EEPROM, a flash ROM, or the like capable of holding a memory content even when power supply is interrupted. The microprocessor 13 writes information into the nonvolatile memory 14, reads out the stored information, and executes various processes based on the read-out data, as necessary. The microprocessor 13 is a microcontroller in which a computer system is incorporated into one integrated circuit, and operates by a program (software) written in an internal ROM. The microprocessor 13 is provided with a plurality of ports to which the respective devices are connected and which input and output signals.

As shown in fig. 3, the control substrate 8 and the optional substrate 10 are connected via a wire 15. In this connection, a flat cable in which a plurality of conductive wires 15 are bundled is used. Further, the control board 8 and the option board 10 are provided with

sockets

16 and 17, and the

sockets

16 and 17 are connected to connectors provided at both ends of the flat cable. Alternatively, the optional board 10 may be soldered directly to the lead wire 15 without using a connector or a socket on the optional board 10 side, and the connector provided at the tip end may be inserted into a socket of the control board 8 to be connected.

The socket 16 of the option board 10 is provided with a reception output terminal 18 connected to the reception unit 11 and a switch output terminal 19 connected to the push switch 12. The socket 17 of the control board 8 is provided with a 1 st terminal 21 connected to the reception output terminal 18 via one lead 15 and a 2 nd terminal 22 connected to the switch output terminal 19 via the other lead 15.

Further, the socket 17 of the control board 8 has two terminals in addition to the 1 st terminal 21 and the 2 nd terminal 22, and these terminals are also connected to the socket 16 of the option board 10. The first one is a dc power supply terminal Vcc, and a predetermined voltage generated on the control board 8 side, for example, a dc voltage of 5V is supplied to the option board 10 side. The other is a ground terminal G for matching the ground (ground) of the control substrate 8 with the ground of the optional substrate 10.

In the present embodiment, when the receiving unit 11 receives the infrared signal R, a signal output from the receiving unit 11 is input to the 1 st terminal 21 via the reception output terminal 18. When the push switch 12 is operated, a signal of a short pulse output from the push switch 12 is input to the 2 nd terminal 22 via the switch output terminal 19.

In the control board 8, the 1 st terminal 21 is connected to the 1 st port 31 of the microprocessor 13 via a wiring pattern, and the 2 nd terminal 22 is connected to the 2 nd port 32 of the microprocessor 13 in the same manner. Further, the line 20 for transmitting a signal output from the wired remote controller 7 is connected to the 3 rd port 33 of the microprocessor 13 via the 3 rd terminal 30. That is, the control board 8 includes a 3 rd terminal 30 to which the wire 20 extending from the wired remote controller 7 can be connected. The microprocessor 13 is provided with a plurality of ports for outputting signals for driving various electric components in the air conditioner main body 2, inputting detection data of sensors, communicating with an outdoor unit, and the like, but detailed description of other ports is omitted.

In addition, the line 23 between the receiving unit 11 and the reception output terminal 18 on the option substrate 10 is grounded via a pull-down resistor 24. Furthermore, a line 25 between the push switch 12 and the switch output terminal 19 is grounded on the option substrate 10 via a pull-down resistor 26. A line 27 formed of a wiring pattern between the 1 st terminal 21 and the microprocessor 13 on the control substrate 8 is grounded via a pull-down resistor 28. In addition, the line 29 formed by the wiring pattern between the 2 nd terminal 22 on the control substrate 8 and the microprocessor 13 is not grounded.

As shown in fig. 2, when the option board 10 is not connected to the control board 8, that is, when the option component 9 is not mounted on the air conditioner main body 2, the 1 st terminal 21 and the 2 nd terminal 22 are not connected to each other. Here, external noise may enter the 1 st port 31 or the 2 nd port 32 of the microprocessor 13 through the 1 st terminal 21 or the 2 nd terminal 22.

However, since the microprocessor 13 checks whether or not the signal input from the 1 st port 31 is the reception code format (communication format) of the signal output from the receiving unit 11, a malfunction (erroneous determination) does not occur even if noise enters the 1 st port 31.

On the other hand, the signal input to the 2 nd port 32 is a single pulse signal based on the push switch 12, and is a simple signal indicating only input or no input. Therefore, even if the signal input to the 2 nd port is noise, the microprocessor 13 determines that the signal is input, that is, the switch is pressed, and may malfunction if the voltage exceeds a certain voltage value.

Therefore, in the present embodiment, when the option board 10 is not connected to the control board 8, the 2 nd terminal 22 is set to the disabled state. When the option board 10 and the control board 8 are connected, this is detected based on a predetermined condition, and the 2 nd terminal 22 is switched to the active state. In addition, the invalid state means: a state in which no processing based on the signal is performed even if the signal is input. In addition, the valid state means: when a signal is input, the signal is read, and the microprocessor 13 on the control board 8 executes a process based on the signal.

In the microprocessor 13 of the present embodiment, the 1 st port 31 is configured as an input port, and the 2 nd port 32 is configured to be switchable to an output port or an input port. The microprocessor 13 sets the 2 nd port 32 as an output port, and sets an output of 0V voltage, that is, a Low (Low) output. In this way, the 2 nd terminal 22 is in an invalid state, that is, a state of not receiving an input signal. On the other hand, if the microprocessor 13 sets the 2 nd port 32 as the input port, the 2 nd terminal 22 becomes the active state.

The microprocessor 13 performs a process of switching the 2 nd port 32 to an input port when it is determined that a signal is input to the 1 st port 31 via the 1 st terminal 21 and the signal is a signal based on the reception of the infrared ray signal R. When the 2 nd port 32 becomes an input port, the 2 nd terminal 22 is switched to an active state. When a voltage signal of 5v (hi) or more or a voltage signal of 0v (low) is input to the 2 nd port 32 which is in the active state, the signal is read and processing based on the input is executed.

The nonvolatile memory 14 stores data (flag) indicating the valid state or invalid state of the 2 nd port 32, that is, the state of the 2 nd terminal 22. When the decorative panel 3 provided with the option member 9 in the initial state is initially connected, that is, when the decorative panel 3 provided with the option member 9 is installed, the nonvolatile memory 14 stores a state in which the 2 nd port 32 is in the disabled state as a default value. When the infrared signal R is input to the 1 st port 31, the 2 nd port 32 is switched to an active state, and data indicating the active state is stored in the nonvolatile memory 14.

Then, the microprocessor 13 reads out the data stored in the nonvolatile memory 14 when the power is turned on, and sets the state of the 2 nd port 32 to either the invalid state or the valid state based on the result. That is, if the stored data of the nonvolatile memory 14 shows an invalid state, the microprocessor 13 sets the 2 nd port 32 as an output port of the invalid state, and if the stored data of the nonvolatile memory 14 shows a valid state, the microprocessor sets the 2 nd port 32 as an input port of the valid state.

Further, even if the power supply to the control board 8 (air conditioner main body 2) is stopped, the state of the 2 nd port 32 before the power supply is stopped is stored in the nonvolatile memory 14, and therefore, when the power supply to the control board 8 is restarted, the state of the 2 nd terminal 22 can be set to the same state as that before the power supply is stopped.

With the above configuration, at the time of shipment of the air conditioner main body 2 from the manufacturing plant (initial state), data in which the 2 nd port 32 is set as an output port, that is, data in which the 2 nd terminal 22 is set in an invalid state is stored in the nonvolatile memory 14. Therefore, the 2 nd terminal 22 is in an inactive state when the air conditioner main body 2 is installed. Even if only the wired remote controller 7 is provided and the decorative panel 3 without the optional member 9 is mounted, since the invalid state of the 2 nd terminal 22 is maintained, it is possible to prevent malfunction due to noise.

On the other hand, when the decorative panel 3 having the option member 9 is attached to the air conditioner main body 2, the infrared signal R transmitted from the wireless remote controller 6 is received by the receiving unit 11 by operating the wireless remote controller 6, and the signal is input to the 1 st terminal 21, whereby the 2 nd terminal 22 is switched from the disabled state to the enabled state. That is, when the air conditioner main body 2 is installed, the 2 nd terminal 22 is automatically switched from the disabled state to the enabled state by first performing an operation using the wireless remote controller 6. Therefore, troublesome man-hours for switching the state of the 2 nd terminal 22 are not required, and man-hours for an operator to install the air conditioner main body 2 can be reduced.

Since the data indicating the state of the 2 nd terminal 22 is stored in the nonvolatile memory 14, if the 2 nd terminal 22 is once set to the active state, the 2 nd terminal 22 is set to the active state at the time of restarting the power supply even if the power supply is stopped, and thus, the man-hour for resetting is not required.

Further, when the operation by the wireless remote controller 6 is not performed after the installation of the air conditioner main body 2, for example, when the option member 9 is detached from the air conditioner main body 2, the 2 nd terminal 22 can be returned from the enabled state to the disabled state.

When the 2 nd terminal 22 is returned to the disabled state, the operation is performed using the wired remote controller 7 (switching device). In the present embodiment, the operation is performed by setting the mode of the wired remote controller 7 to the service mode. Then, the data indicating the state of the 2 nd terminal 22 stored in the nonvolatile memory 14 is rewritten to the initial value using the wired remote controller 7, thereby returning the 2 nd terminal 22 to the invalid state.

The control board 8 of the air conditioner 1 according to the present embodiment includes hardware resources such as a microprocessor 13, a nonvolatile memory, and a volatile memory (not shown), and the microprocessor 13 executes various programs to realize information processing by software using the hardware resources.

Next, the operation process of the air conditioner 1 executed by the microprocessor 13 will be described with reference to fig. 4 and 5. In the explanation of each step in the flowchart, for example, the part described as "step S11" is simply described as "S11".

As shown in fig. 4, at the time of startup of the control board 8, the microprocessor 13 first reads data indicating the state of the 2 nd terminal 22 stored in the nonvolatile memory 14, and determines whether or not the 2 nd terminal 22 is set to the enabled state (S11).

Here, in the case where the 2 nd terminal 22 is in the active state (yes in S11), the 2 nd port 32 is set as the input port (S12), and S14 is entered. On the other hand, when the 2 nd terminal 22 is not in the active state, that is, in the inactive state (no in S11), the 2 nd port 32 is set as the output port (S13), and the process proceeds to S14.

In S14, the microprocessor 13 checks whether or not the infrared ray is received in the receiving unit 11. That is, the signal input in the 1 st port 31 (1 st terminal 21) is confirmed. Next, the microprocessor 13 determines whether the receiving unit 11 has received infrared rays, that is, whether a signal is input to the 1 st port 31 (S15). Here, when the receiving unit 11 does not receive infrared rays (no in S15), the process proceeds to S21 described later. On the other hand, when the receiving unit 11 receives infrared rays (yes in S15), the process proceeds to S16.

In S16, the microprocessor 13 determines whether or not the signal based on the reception of the infrared signal R transmitted from the wireless remote controller 6 by the reception unit 11, that is, the reception code format of the signal input to the 1 st port 31 is correct. Here, if the received code format is incorrect (no in S16), for example, if noise is mixed in the signal, the input signal is ignored, and the process proceeds to S21 described later. On the other hand, if the received code format is correct (yes in S16), the process proceeds to S17.

In S17, the microprocessor 13 reads out the data indicating the state of the 2 nd terminal 22 stored in the nonvolatile memory 14, and determines whether or not the 2 nd terminal 22 is in an invalid state. Here, if the 2 nd terminal 22 is in the active state (no in S17), the process proceeds to S20. On the other hand, when the 2 nd terminal 22 is in the invalid state (yes in S17), the data stored in the nonvolatile memory 14 is rewritten to the data in which the 2 nd terminal 22 is in the valid state (S18). Next, the microprocessor 13 sets the 2 nd port 32 as the input port (S19), and proceeds to S20.

In S20, the microprocessor 13 executes operation switching processing based on the reception code of the signal input to the 1 st port 31. Further, by this operation switching process, on/off control of the air conditioner main body 2, change of the air volume of the blower 5, change of the air conditioning set temperature, and the like are executed. In the present embodiment, even when the air conditioner main body 2 is in the off (operation stop) state, the supply of electric power to the control board 8 is maintained. Then, the process proceeds to S21.

As shown in fig. 5, in S21, the microprocessor 13 reads out the data indicating the state of the 2 nd terminal 22 stored in the nonvolatile memory 14, and determines whether or not the 2 nd terminal 22 is in the valid state. Here, when the 2 nd terminal 22 is in the inactive state (no in S21), the process returns to S14 and the subsequent processes are repeated. On the other hand, if the 2 nd terminal 22 is in the active state (yes in S21), the process proceeds to S22.

In S22, the microprocessor 13 determines whether or not a signal is input to the 2 nd port 32 (2 nd terminal 22) based on the input of the operation of the push switch 12. Here, when no signal is input to the 2 nd port 32 (no in S22), the process returns to S14 and the subsequent processes are performed in a loop. On the other hand, when the signal is input to the 2 nd port 32 (yes in S22), the operation on/off switching process is executed as an emergency treatment operation when the wireless remote controller 6 is lost. By this operation on/off switching process, the on/off control of the air conditioner main body 2 is executed. Then, the process returns to S14 and the subsequent processes are repeated.

Here, the operation on/off switching process means the following process: as described above, when the air conditioner main body 2 is in operation, the operation is stopped (off), and conversely, when the air conditioner main body 2 is in a stop, the operation is started (on). Various settings such as the air volume of the blower 5, the set temperature, and the operation mode such as cooling and heating when the operation is started may be the same as those in the previous operation, or all the settings may be set to the automatic operation mode automatically set by the air conditioner main body 2. However, when the various settings during the emergency operation based on the operation of the push switch 12 are set to be the same as the settings during the previous operation, it is necessary to store the contents of the various settings during the previous operation in the nonvolatile memory 14 in advance.

In the flowchart of the present embodiment, the steps are executed sequentially, but the relationship between the steps is not necessarily fixed, and the relationship between the steps may be partially exchanged. Further, some steps may be executed in parallel with other steps.

According to the embodiment described above, the air conditioner includes a microprocessor (processing unit) that executes: when an optional component is mounted and a signal is input from the receiving unit to the 1 st terminal, the 2 nd terminal, which is in an inactive state when the optional component is not mounted, is switched to an active state. Thus, when the optional component is not mounted on the air conditioner main body, the 2 nd terminal is in an invalid state, so that the air conditioner capable of preventing the malfunction caused by the noise is provided. Further, since the 2 nd terminal can be set to the active state by the operation of the wireless remote controller after the optional member is attached to the air conditioner main body, the man-hours for the operator to install the air conditioner can be reduced.

Further, the microprocessor is configured to execute a process of setting the state of the 2 nd terminal to the same state as before the stop of the power supply based on data of the nonvolatile memory when the power supply to the control board is restarted, so that the microprocessor can maintain the valid state of the 2 nd terminal even if the power supply to the air conditioner main body is stopped thereafter when the optional component is attached to the air conditioner main body and the 2 nd terminal is set to the valid state by the wireless remote controller.

Further, the nonvolatile memory stores data for setting the 2 nd terminal to an invalid state in the initial state, whereby the initial state of the 2 nd terminal becomes an invalid state, and when an optional component is not mounted on the air conditioner main body, no malfunction occurs even if noise enters the 2 nd terminal.

Further, by switching at least the 2 nd terminal from the enabled state to the disabled state by an operation other than the wireless remote controller, the 2 nd terminal can be returned from the enabled state to the disabled state when the option member is detached from the air conditioner main body.

The device for switching at least the 2 nd terminal from the active state to the inactive state is a wired remote control for operating the air conditioner main body. In this way, the wired remote control for operating the air conditioner main body can be used also as a device for switching the state of the 2 nd terminal.

The microprocessor includes a 1 st port as an input port connected to the 1 st terminal and a 2 nd port connected to the 2 nd terminal and switchable to an output port or an input port, and executes a process of switching the 2 nd port as an output port to an input port when it is determined that a signal input to the 1 st port is a signal based on reception of an infrared signal. In this way, by setting the 2 nd port as the output port and setting the 2 nd terminal in the invalid state, malfunction does not occur even if noise enters the 2 nd terminal. Further, by setting the 2 nd port from the output port to the input port, the 2 nd terminal can be set from the invalid state to the valid state. Further, even if noise enters the 1 st port, it is determined whether or not the signal is a signal based on reception of an infrared signal, and therefore, malfunction can be prevented.

In the present embodiment, the wireless remote controller 6 that transmits an infrared signal is exemplified as the remote operation device, but it may be replaced with a controller that uses another wireless communication. For example, a controller using a short-range wireless communication technology or a wireless LAN network technology may be used as the remote operation device.

The present invention has been described with reference to several embodiments, which are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, substitutions, changes, and combinations can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the scope equivalent thereto.

Description of the symbols

1: an air conditioner; 2: an air conditioner main body; 3: a decorative plate; 4: a heat exchanger; 5: a blower; 6: a wireless remote controller (remote operation device); 7: wired remote control; 8: a control substrate (control unit); 9: an optional component; 10: an optional substrate; 11: a receiving section; 12: a push button switch; 13: a microprocessor (processing unit); 14: a non-volatile memory; 15: a wire; 16. 17: a socket; 18: a reception output terminal; 19: a switch output terminal; 20: a wire; 21: a 1 st terminal; 22: a 2 nd terminal; 23: a wire; 24: a pull-down resistor; 25: a wire; 26: a pull-down resistor; 27: a wire; 28: a pull-down resistor; 29: a wire; 30: a 3 rd terminal; 31: 1 st port; 32: a 2 nd port; 33: a 3 rd port; r: an infrared signal; t: and (4) a ceiling.

Claims

1. An air conditioner is provided with:

an air conditioner main body; and

a control part which is arranged on the air conditioner main body, controls the operation of the air conditioner main body, and can be connected with an optional component, the optional component is provided with a receiving part and a switch, the receiving part receives a wireless signal sent by a remote operation device used for the operation of the air conditioner main body, the switch is used for the operation of the air conditioner main body,

the control unit includes:

a 1 st terminal to which a signal is input from the reception unit;

a 2 nd terminal to which a signal is input from the switch; and

and a processing unit configured to disable an input to the 2 nd terminal before a signal is input from the receiving unit to the 1 st terminal, and to enable an input to the 2 nd terminal after a signal is input from the receiving unit to the 1 st terminal.

2. The air conditioner according to claim 1,

a nonvolatile memory provided in the control unit and storing data indicating whether the 2 nd terminal is valid or invalid,

when the power supply to the control unit is restarted, the processing unit sets the state of the 2 nd terminal to the same state as before the power supply is stopped, based on the data of the nonvolatile memory.

3. The air conditioner according to claim 2,

the nonvolatile memory stores data in which the 2 nd terminal is set to an invalid state in an initial state.

4. The air conditioner according to any one of claims 1 to 3,

the control unit includes a 3 rd terminal to which a wired remote controller can be connected.

5. The air conditioner according to any one of claims 1 to 3,

the processing unit includes a microprocessor, and includes:

a 1 st port connected to the 1 st terminal; and

a 2 nd port connected to the 2 nd terminal and switchable to an output port or an input port,

when it is determined that the signal input to the 1 st port is a signal based on reception of the radio signal, the 2 nd port is switched from an output port to an input port, and thereby the input of the 2 nd terminal is enabled after the signal is input from the receiving unit to the 1 st terminal.