JP2524811Y2 - Air conditioner - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a connection check between an indoor unit and an outdoor unit of an air conditioner used for a building or the like.

(Prior Art) Conventionally, in a building air conditioner, a plurality of outdoor units of similar or the same shape are juxtaposed at one place as shown in FIG. 10, and a refrigerant pipe corresponds to each outdoor unit individually. It is led and connected to each indoor unit.

During maintenance and inspection of such air conditioners for buildings, it is necessary to follow the refrigerant pipes connected to the indoor / outdoor units in order to confirm the correspondence from each indoor unit to each indoor unit. Can be confirmed.

However, it is easy to make a mistake when the refrigerant piping is complicated due to local merging of refrigerant piping such as around the outdoor unit, and when the indoor unit is structurally embedded in the ceiling and the piping is hidden, the refrigerant piping Was difficult to follow.

In such a case, it is necessary to stop or operate all the indoor / outdoor units that are not subjected to the maintenance and inspection, and to reverse the operation of only the indoor / outdoor units to be subjected to the maintenance and inspection, thereby confirming the response.

Therefore, as shown in FIG. 11 and FIG. 12, a confirmation switch for confirming the connection of the indoor / outdoor unit is provided in the operation unit of the remote controller on the indoor side, and a notifying means which operates according to the operation of the confirmation switch is provided. An air conditioner provided in an outdoor unit has been considered.

(Problem to be solved by the present invention) However, in such a configuration, it is necessary to newly provide a confirmation switch 25 as shown in FIG.
Repeated mischief may cause the air conditioner to break down.

Therefore, such a switch exposed on the surface of the operation panel is inconvenient.

In view of the above, an object of the present invention is to provide an air conditioner which can prevent unnecessary operation by a user and a failure due to tampering, and can check connection between an indoor unit and an outdoor unit exclusively for a service person who performs maintenance and inspection.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, an air conditioner of the present invention includes a control microcomputer and an indoor unit provided on the indoor side and a control microcomputer. An outdoor unit connected to the indoor unit by a refrigerant pipe and provided on the outdoor side, an operation changeover switch, a temperature setting switch, a plurality of operation switches such as an air volume changeover switch and a control microcomputer, and according to the operation of the operation switch group An air conditioner comprising: a remote controller for remote control that outputs an operation signal to the indoor unit; and a transmission unit that transmits an operation signal from an operation switch group of the remote controller to the outdoor unit via the indoor unit by a serial signal. , A decorative panel covering a front surface of the remote controller, and a remote control panel covered by the decorative panel. A diode insertion part, which is provided on the inner surface and has two pole terminals for inserting a diode, and a service inspection by inserting a diode into the diode insertion part provided in the remote control microcomputer. Timer short-circuit means for outputting a serial operation signal of the operation unit, and a diode inserted into the diode insertion portion, the operation signal output by operating a specific switch of the operation switch group, the indoor unit and the outdoor unit A conversion means for converting into a confirmation signal for confirming the connection relationship, and a notifying means provided in the outdoor unit and notifying the outside when the confirmation signal is transmitted by a serial signal from an indoor unit, I have.

(Operation) In such a configuration, in order to confirm that the indoor unit and the outdoor unit are in a connection relationship, the decorative panel on the front of the remote controller attached to the indoor side is removed, and a diode is inserted into the diode insertion portion. After that
Operate a specific switch in the switch group.

Then, the output operation signal is converted into a confirmation signal for confirming that the indoor unit and the outdoor unit are in a connected relationship. When the confirmation signal is transmitted to the outdoor unit via the transmission means, the control of the outdoor unit is performed. The unit drives the notifying unit to notify.

(Example) Hereinafter, an example of the present invention is described based on a drawing.

FIG. 3 shows a wired remote controller according to the present embodiment,
The front of the remote control is covered with a decorative panel 78, and on the left half, an operation switching mode display section 7 showing the contents of control of the air conditioner.
9. The liquid crystal unit 70 including the air volume switching mode display unit 80, the set temperature display unit 81, and the timer display unit 82 is arranged so as to be visible from the liquid crystal window of the decorative panel 78.

On the other hand, a function changeover switch 51 is provided on the right half surface, and is hidden by a rotatable lid 76 provided on the decorative panel 78. A run / stop switch 77 is provided below the lid 76, and a lighting lamp for displaying run / stop is provided on the left side of the run / stop switch 77.

In order to operate the air conditioner by such a remote controller, first, the handle 91 of the cover 76 of the decorative panel 78 is pulled toward the user, and the cover 76 is opened.

When the lid 76 is opened, there is a function changeover switch unit 51 as shown in FIG. 4, and the function changeover switch unit 51 has an operation changeover switch 71 for selecting any one of the cooling, heating 1, heating 2 and air blowing operation modes; Air volume selector switch 73 that switches the air volume
And a temperature setting switch 74 for setting a temperature, and a timer setting section 75 for setting an off timer, an on timer and the like.
Since the display of 70 is switched, a desired operation is selected by operating the function changeover switch section 51, and then the operation can be performed by pressing the operation switch 77 to turn on the lighting lamp 92.

FIG. 1 is a front view of the inside of the remote controller shown in FIGS. 3 and 4 from which the makeup panel 78 is removed. In addition to the start / stop switch 77, the function changeover switch unit 51, and the liquid crystal unit 70, Panel support base 85 for supporting panel 78, hooking section 90 for hooking decorative panel 78, fixing section 89 for fixing the remote control body to the wall, signal input / output terminal 86 for inputting / outputting a serial signal as an operation signal, operation power supply for remote control The figure shows a battery insertion portion 87 for inserting a battery 83, and a diode insertion portion 88 for changing the operation content of the function changeover switch portion 51 by inserting a diode into two holes.

In the present embodiment, the setting of the operation mode is set such that the connection confirmation operation is performed when the operation mode is set to the ventilation after the operation content is changed.

Therefore, when confirming the connection between the indoor unit and the outdoor unit, after removing the decorative panel 78 as shown in FIG. 1, a diode is inserted into the diode insertion portion 88 in the direction indicated.

Thereafter, the operation changeover switch 71 may be pressed to set the operation mode to blow. At this time, whether or not the air is blown can be confirmed by displaying “Blow” on the operation switching mode display section 79.

As described above, according to the present invention, the operation signal is converted into the service mode for the serviceman, and the operation mode is set to the ventilation, so that the notification means provided in the outdoor unit can be operated only for the first time.

Next, a mechanism for changing the operation content of the operation switch will be specifically described with reference to FIGS. 5 to 7. FIG.

FIG. 5 is a circuit configuration diagram of the remote controller of the present embodiment. A liquid crystal circuit 60 for displaying the operation content on a liquid crystal, a transmission / reception circuit 62 for transmitting / receiving an operation signal from the control circuit 61 to the indoor unit as a serial signal, a bias circuit, A resistor group (R0-R9) connected in parallel to the power supply VDD and a switch group (SW0-S) corresponding to an operation switch and short-circuiting these resistors (R0-R9) respectively
W9) and the on / off of each switch of the switch circuit are read from a plurality of ports, an operation signal consisting of a plurality of bits is transmitted and received to the transmission / reception circuit 62, and the liquid crystal circuit 60 is driven according to the operation content. And a control circuit 61.

With such a circuit configuration, a plurality of bits of "H" and "L" signals (hereinafter referred to as serial signals) are transmitted from the control circuit 61 via the transmission / reception circuit in accordance with the operation content selected by the switch circuit, and the indoor unit and the outdoor The unit is controlled.

Here, the contents of the serial signal of this embodiment
This will be described with reference to FIGS.

FIG. 6 shows a configuration of a serial signal transmitted / received from the transmission / reception circuit 62. Eight bits from bit No. 1 to No. 8 are set as basic one set data, and FIG. 7 shows a function for each bit number. It is shown.

Bits No. 1 and No. 8 are used to switch the operation mode, and as shown in FIG.
Cooling / heating 1 / heating 2 / blowing is switched by the combination of “L”.

Bits No. 2 to No. 5 are bits for switching the compressor operation frequency, and switch the compressor operation frequency by a combination of ON / OFF of four bits.

Bit No. 6 is a release signal bit, which reads a serial signal received from the indoor unit and sets “H” when it is determined that release control is required.

Bit No. 7 is a timer short bit, which becomes "H" by inserting the above-mentioned diode. When bit No. 7 is "H", the serial signal transmitted from the control circuit is service checked from normal operation. This means that the operation signal has been changed.

In the indoor unit, the operation content is decoded by determining whether the serial signal including the plurality of operation contents as described above is “H” or “L” for each bit.

Therefore, if the microcomputer of the indoor unit and the microcomputer of the outdoor unit are set to determine that the timer short bit is "H" as a signal for service check, the timer short bit is set to "H" by inserting the diode described above. By doing so, the operation for service inspection can be shared with a normal operation switch.

In this embodiment, the timer short bit is “H”.
Is set so that the operation mode is ventilation and the notification means is driven.

Next, a method for confirming the connection between the indoor unit and the outdoor unit using the remote controller described above will be described based on a functional block diagram showing the configuration of an embodiment of the air conditioner according to the present invention shown in FIG. .

The indoor unit is an indoor unit consisting of the indoor unit 24 of the remote controller 23
21 is provided, and an outdoor unit 22 is provided outside the room.

As shown in FIG. 4, a remote controller 23 provided in the indoor unit 21 has a function changeover switch unit 51 such as an operation changeover switch 71 for outputting an operation signal by manual input, an air volume changeover switch 73, a temperature setting switch 74, and the like. Unit 88 for switching the signal to a confirmation signal for connection confirmation, and a microcomputer 26 for inputting an operation signal from the function changeover switch unit 51 and a signal from the diode insertion unit 88 and outputting a coded signal
And the modulated signal obtained by modulating the signal from the microcomputer 26
A transmission circuit 27 for transmitting data to the transmission circuit 24 is provided.

The air conditioner of the present embodiment has a compressor 37, a four-way valve 35,
It has a refrigeration cycle in which an outdoor heat exchanger 39 and a two-way valve 36, an expansion valve 38, and an indoor heat exchanger 40 connected in parallel with the outdoor heat exchanger 39 are sequentially connected by refrigerant piping.

The indoor unit 24 provided in the indoor unit 21 includes an indoor heat exchanger 40 in the refrigeration cycle, an indoor fan 42 provided at a position through which the indoor heat exchanger 40 can be ventilated, and modulation by the remote controller 23. A receiving circuit 28 for outputting a demodulated signal obtained by demodulating the signal, a heat exchange sensor 52 for detecting a temperature, a temperature sensor 48 for detecting a temperature in a room, a radiation sensor 50 for detecting a radiation amount in a room, and detecting a humidity in a room A sensor unit 53 such as a humidity sensor 49, and a detection signal and a reception circuit from the sensor unit 53.
When the demodulated signal from 28 is received, the signal is
If it is determined whether to control the side of the indoor unit 21 or the outdoor unit 22 and the control of the indoor unit 21 is determined, the indoor unit 24 is controlled.
Control each function of the display unit 47, the indoor fan 42, etc., and conversely,
When it is determined that the control is performed on the outdoor unit 22 side, a control signal obtained by converting the control process into a signal is transferred to the serial transmission circuit 30.A control signal transferred from the microcomputer 29 is converted into an AC serial signal, and the serial signal is output to the outdoor unit 22. Transmission circuit 30
It is composed of

The outdoor unit 22 includes a compressor 37 and a four-way valve 3 in the refrigeration cycle.
5, outdoor heat exchanger 39, two-way valve 36, expansion valve 38, and outdoor heat exchanger
An outdoor fan 43 provided at a position through which air can pass through 39, and a microcomputer 32 which receives an AC serial signal from the indoor unit 21 and receives
And a serial receiving circuit 31
Decoding control commands from signals from the
A microcomputer 32 that receives a detection signal from a heat exchange sensor 54 provided in the outdoor heat exchanger 39 and outputs a drive signal to a drive circuit 33, and a compressor that receives a drive signal from the
37, a four-way valve 35, an outdoor heat exchanger 39, a two-way valve 36, an expansion valve 38, a drive circuit 33 for driving an outdoor fan 43, etc., and a microcomputer
A blinking lamp 34 which blinks when a signal from 32 is input.

As shown in FIG. 9, the flashing lamp 34 has an outer surface (34a to 34a) which can be checked without removing the panel or the like of the outdoor unit.
4j).

The operation of confirming the connection between the indoor unit and the outdoor unit of the air conditioner having such a configuration will be described.

First, when a diode is inserted into the diode insertion section 88 of the remote controller 23 and any one of the function changeover switch sections 51 is operated to a specific mode (for example, the operation changeover switch 71 is set to the blow mode), the function at this time is started. The microcomputer 26 outputs the operation signal output from the changeover switch unit 51 to the transmission circuit 27 as a converted confirmation signal for connection confirmation in the microcomputer 26. The transmission circuit 27 transmits a modulated signal obtained by modulating the confirmation signal from the microcomputer 26 to the indoor unit 24.

Then, the receiving circuit 28 provided in the indoor unit 24 receives the modulated signal from the remote controller 23, and further demodulates the received signal and outputs it to the microcomputer 29. In the microcomputer 29, the receiving circuit 28
Is transmitted to the serial transmission circuit 30, and the serial transmission circuit 30 converts the signal transmitted from the microcomputer 29 into an AC serial signal and outputs it to the serial transmission circuit 31.
When the serial reception circuit 31 transfers the AC serial signal from the serial transmission circuit 30 to the microcomputer 32, the microcomputer 32 identifies the control command from the AC serial signal from the serial reception circuit 31 and determines that the control command is a confirmation signal for connection confirmation. A signal is output to a blinking lamp 34 which is a notification means. Alternatively, a drive signal for continuously and repeatedly switching the refrigerant flow switching valves such as the two-way valve 36 and the four-way valve 35 is output to the drive circuit 33. The blinking lamp 34 and the refrigerant flow switching valve to which such a signal has been input start the notification operation.

When the operation changeover switch 71 is operated again to switch to an operation mode other than the specific mode, the microcomputer 32
The operation signal is transmitted by the same operation up to this point, and the microcomputer 32 ends the notification operation.

As described above, in the present embodiment, the diode insertion portion for switching the operation signal from the normal operation to the signal for service inspection is provided inside the remote controller, and further, the connection confirmation operation is not performed unless a specific operation mode is set. The function changeover switch section 51 is not complicated and can be used exclusively for service personnel, so that unnecessary operations by the user can be performed.
Mischief can be prevented.

Note that it is appropriate to attach the diode insertion part to a place where it can be inserted only after removing the cover of the remote control so that it can be inserted only at the time of failure diagnosis.

[Effects of the Invention] According to the present invention, a diode insertion portion for switching an operation signal from a normal operation to a signal for service inspection is provided inside a remote controller, and further, a connection confirmation operation is not performed unless a specific operation mode is set. So a special switch,
Without adding a new one, just use the normal operation switch,
In addition to the service check, the connection check operation can be performed. In addition, since the diode insertion portion is always covered with the decorative cover during normal use, it is possible to prevent dust from accumulating in the hole of the insertion portion, which may cause poor connection or malfunction due to accumulation of dust. It is possible to improve reliability at the time of service inspection and prevent unnecessary operation and mischief by the user.

[Brief description of the drawings]

FIG. 1 is a front view of the wired remote controller according to the present invention with the decorative cover removed, FIG. 2 is a functional block diagram showing the configuration of the embodiment of the present invention, and FIG. 3 is an external view of the wired remote controller according to the present invention. FIG. 4 is a front view of the wired remote control in which the lid is opened, and the liquid crystal display unit is shown in a lighting state for the sake of explanation. FIG. 5 is a circuit configuration diagram of the wired remote control, and FIG. FIG. 7 is a block diagram of a serial signal transmitted from the wired remote controller, FIG. 7 is a functional block diagram of each bit number of the serial signal, FIG. 8 is a bit correspondence diagram corresponding to an operation mode, and FIG. FIG. 10 is a diagram showing an air conditioner in which a plurality of indoor units are connected to a conventional outdoor unit, and FIG. 11 is a remote control having a conventional confirmation switch. Perspective view, FIG. 12 is a basic configuration diagram for a connection confirmation of the indoor unit and the outdoor unit. 21 indoor unit, 22 outdoor unit 34 flashing lamp, 35 four-way valve 36 two-way valve, 76 lid 78, decorative panel, 88

Claims (1)

(57) [Scope of request for utility model registration] An indoor unit provided with a control microcomputer and provided on the indoor side; an outdoor unit provided with the control microcomputer and connected to the indoor unit via a refrigerant pipe and provided on the outdoor side; an operation changeover switch, a temperature setting switch, A remote control for remote control, comprising a plurality of operation switches such as an air volume changeover switch and a control microcomputer, and outputting an operation signal to the indoor unit in accordance with operation of the operation switch group, and operation from the operation switch group of the remote control In an air conditioner having transmission means for transmitting a signal to the outdoor unit through the indoor unit by a serial signal, a decorative panel covering a front surface of the remote controller and a remote control inner surface covered by the decorative panel are provided. , A diode insertion part consisting of two pole terminals for inserting a diode Timer short-circuit means provided in the control microcomputer for the remote controller, which outputs a serial operation signal for service inspection by inserting a diode into the diode insertion section, and inserts a diode into the diode insertion section to perform the operation. A conversion unit configured to convert an operation signal output by operating a specific switch in the switch group into a confirmation signal for confirming that the indoor unit and the outdoor unit are in a connection relationship, and provided in the outdoor unit. An air conditioner, comprising: a notifying unit that notifies the outside when the confirmation signal is transmitted by a serial signal from an indoor unit.