JP3481094B2 - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner where the standardization of a control board, the facilitation of operation setting and changing work, etc., are contrived. SOLUTION: An ECU on the side of a remote controller shifts to a simple setting mode when the trial operation/inspection switch 137 is pressed for four seconds or more, and confirms that indoor units are connected in one vs. one. Next, when temperature setting switches 127 and 129 are pressed, the ECU on remote controller side switches the item code indication concerned with a control parameter, based on the storage information within the ROM of the ECU on indoor side. Next, the ECU on remote controller side settles the controller parameter to change the operation setting, when timer time set switches 117 and 119 are pressed, and switches the setting data indication 109, based on the storage information within the ROM. After that, the ECU on remote controller side settles the setting data when a set switch 12 is pressed, and terminates the setting change when the trial operation/inspection switch 137 is pressed, and orders the ECU on indoor side to rewrite of the operation setting in the EEPROM.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which operation settings are stored in the control means of an indoor unit,
More specifically, the present invention relates to a technology that enables changing operation settings when installing an indoor unit, while making common use of control boards and facilitating work to change operation settings.

[0002]

2. Description of the Related Art Normally, in an indoor unit of an air conditioner, a CPU (central processing unit) or ROM is provided in its control section.
A control board is provided on which components such as a (read-only storage device) are arranged on a board. The CPU on the control board
Various control programs and operation settings are called from the ROM, and drive control of each device (electric expansion valve, electric fan, etc.) and mutual communication with an outdoor unit are performed based on input information from switches and sensors. There are various operation settings stored in the ROM, such as the correction of the deviation between the intake temperature and the room temperature during the heating / cooling operation depending on the life (lifetime) of the air filter and the installation form. Was used for each model.

[0003]

As described above, the conventional indoor unit uses a dedicated control board for each model. Therefore, when the number of models of the indoor unit increases, the number of control boards increases undesirably. There was a problem. That is, there are many control boards for indoor units that differ only in the operation settings stored in the ROM, even if the components and their mounting states are exactly the same, which complicates production management, inventory management, and the like. In addition, the unit price will increase due to high-mix low-volume production. In addition, when installing the indoor unit, an air filter with specifications different from the standard setting may be selected, or a retrofit optional device such as a heater may be installed. It was necessary to switch the dip switch on the control board in order to perform the operation correctly.

Therefore, in order to solve these problems, the inventors have mounted a non-volatile storage means such as an EEPROM on the control board of the indoor unit, and rewritably store the operation setting in the non-volatile storage means. Tried. This makes it possible to store various operation settings and increase the versatility of the control board, and it is also possible to change the operation settings using a remote controller, etc., but the operation settings were changed when the indoor unit was installed. There was a new problem that it could not be done. In other words, when communicating and controlling an indoor unit from a remote controller, etc., it is necessary to complete the address assignment (usually automatic address assignment) to that indoor unit, so a large-scale air conditioning system. Therefore, the operation settings cannot be changed until all the piping and wiring work between the multiple outdoor units and multiple indoor units is completed and the trial run and automatic addressing of the entire air conditioning system are performed. For this reason, the installation worker, after the address is assigned to the indoor unit, goes to the site again to change the operation setting, which imposes a heavy burden not only on the work man-hour but also on time.

The present invention has been made in view of the above situation,
An object of the present invention is to provide an air conditioner capable of changing operation settings when installing an indoor unit, while making the control board common and facilitating operation setting change work.

[0006]

In order to solve the above problems, in the invention of claim 1, at least one outdoor unit and a plurality of indoor units are connected through a first communication line, and The indoor unit and the external signal input means are connected via the second communication line, and after the address is set for each indoor unit, the signal input means can communicate and control the indoor unit. In the air conditioner, in the control means of the indoor unit, a first storage means for rewritably storing operation settings for at least one control parameter, and a setting data group including a plurality of setting data are provided as the control parameter. The second storage means stored for each time, and the operation setting for updating the operation setting stored in the first storage means according to the input signal from the signal input means. Setting operation updating means, wherein the operation setting updating means has the signal input means connected to a single indoor unit through the second communication line, and the indoor unit is an outdoor unit and another indoor unit. In the case where the indoor unit is not connected, it is proposed to update the operation setting according to the input signal even if the address setting for the indoor unit is not completed.

According to the present invention, by writing the operation setting in the first storage means at the time of manufacturing the indoor unit, it is possible to form a common control board between the indoor units of different models. Further, the installation operator connects the signal input means via the second communication line in a state where the first communication line is not connected when the indoor unit is installed. Then, for example, the operation setting updating means gives a temporary address to the indoor unit, whereby the signal for updating the operation setting can be input from the signal input means to the indoor unit.

According to a second aspect of the present invention, in the air conditioner of the first aspect, the operation setting updating means includes a plurality of control parameter groups into which the first storage means is divided when the operation setting is updated. It is proposed that the operation setting is stored for each control parameter, and that the signal input means accesses the operation setting updating means by a different procedure for each control parameter group.

In the present invention, for example, each control parameter is divided into a first control parameter group which can be updated relatively freely and a second control parameter group which does not normally need to be updated, and the first control parameter group is The installation worker or the like can easily access it, and the second control parameter group can be accessed only when the service worker or the like takes a predetermined procedure.

According to a third aspect of the present invention, in the air conditioner of the first or second aspect, the signal input means is provided with a display portion, and the display portion is stored in the second storage means. We propose that the setting data is displayed in an encoded state.

According to the present invention, for example, setting data corresponding to each control parameter is displayed on the display unit by a code such as a number or alphabet, and the installation operator or the like can see a table or the like to correspond to a desired operation setting. Select a sign.

In the invention of claim 4, claims 1 to 3
In the air conditioner, it is proposed that the signal input means is a remote controller attached to the indoor unit.

According to the present invention, for example, the installation worker or the service worker appropriately operates the temperature setting switch, the air volume setting switch, or the like while checking the display of the remote controller to update the operation setting in the first storage means. To do.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the air conditioning system according to the present invention, and FIG. 2 is a schematic diagram showing the device configurations in the outdoor unit and the indoor unit. In these figures, the refrigeration cycle is shown by a solid line, and the control / communication circuit is shown by a chain line.

As shown in FIG. 1, the air conditioning system of this embodiment includes a centralized controller 1 that controls and controls the entire system, and a non-polarized two-wire system bus line (first communication) in the centralized controller 1. A plurality of indoor units 5-1 to 5-n connected through a line 3 and the first to third
It is composed of outdoor units 7-1 to 7-3. In the figure,
Reference numeral 9 denotes a wired remote controller (hereinafter, abbreviated as a remote controller) connected to the indoor unit via a remote control line (second communication line) 4.

As shown in FIG. 2, the indoor units 5-1 ...
An indoor heat exchanger 21, an electric fan 23, an electric expansion valve 25, an electric flap 27, etc. are installed on the 5-n side. Further, on the side of the outdoor units 7-1 to 7-3, a compressor 31, an electromagnetic four-way valve 33, an outdoor heat exchanger 35, an electric fan 37,
The accumulator 39 etc. are installed. The devices that make up the refrigerant circuit are connected by refrigerant pipes 41 to 47 that are used for the circulation of gas refrigerant or liquid refrigerant.

An indoor control unit (hereinafter referred to as an indoor ECU) 6 is provided in each indoor unit 5-1 to 5-n.
1 is installed. The indoor ECU 61 starts the CPU 63 and the input / output interface 6 as shown in FIG.
5, 67, ROM (second storage means) 69, RAM 71,
It is composed of an EEPROM (first storage means) 73 and the like. In the case of the present embodiment, the EEPROM 73 stores rewritable operation settings for various control parameters.
The ROM 69 stores a setting data group including a plurality of setting data for each control parameter.

In the indoor ECU 61, the room temperature sensor 81 for detecting the room temperature Tr in the input interface 65, and the first and the first refrigerant temperatures Tfi, Tfo for detecting the refrigerant temperatures Tfi, Tfo on the inlet side and the outlet side during the cooling operation of the indoor heat exchanger 21. 2 Refrigerant temperature sensors 83, 85, remote controller 9 (input system), etc. are connected, and the electric fan 23 and electric expansion valve 2 are connected to the output interface 67.
5, the electric flap 27, the remote controller 9 (display system), etc. are connected.

On the other hand, in each of the outdoor units 7-1 to 7-3,
An outdoor control unit (hereinafter referred to as an outdoor ECU) 91 having substantially the same configuration as the indoor ECU 61 is installed, and the compressor 31, the four-way valve 33, and the electric fan 3 are installed.
7, a pressure sensor 93 that detects the discharge side refrigerant pressure Pd of the compressor 31, and an outside air temperature sensor 95 that detects the outside air temperature Ta.
Etc. are connected.

FIG. 4 is a front view showing the display / operation section of the remote controller 9, and reference numeral 101 in the drawing is a liquid crystal display used for displaying driving information and the like. LCD display 1
In 01, the unit number display (system display 103-indoor unit display 105) to be controlled is displayed on the upper left side, the item code display 107 is displayed on the right center, and the setting data display 109 is displayed on the lower side.
Is done respectively. On the left side of the liquid crystal display 101, the unit selection switch 111,
Swing / wind direction switch 113, timer setting switch 1
15, timer time switches 117 and 119, a set switch 121, and a cancel switch 123 are provided. On the right side of the liquid crystal display 101,
Operation changeover switch 125, temperature setting switch 127, 1
29, wind speed selector switch 131, filter replacement lamp 1
33, its reset switch 135, and a trial run / inspection switch 137 are provided. Further, a driving display lamp 139 and a driving / stopping switch 141 are arranged below the liquid crystal display 101.

Next, the flow of the refrigerant during the cooling operation will be briefly described.

In the outdoor units 7-1 to 7-3, the gas refrigerant sucked from the refrigerant pipe 47 to the compressor 31 becomes a high temperature and high pressure due to adiabatic compression and is discharged from the compressor 31. It flows into the outdoor heat exchanger 35 via the valve 33 and the refrigerant pipe 42. The high-temperature and high-pressure gas refrigerant is cooled by the outside air while passing through the outdoor heat exchanger 35 and becomes a liquid refrigerant by being condensed, and then passes through the refrigerant pipe 43 to each indoor unit 5-1 to 5--. It flows into the n electrically driven expansion valve 25.

After the flow rate of the liquid refrigerant is adjusted by the electric expansion valve 25, the liquid refrigerant flows into the indoor heat exchanger 21 via the refrigerant pipe 44. The liquid refrigerant is vaporized into a gas refrigerant while passing through the indoor heat exchanger 21, and the electric fan 2 is heated by the latent heat of vaporization.
The room air blown by 3 is cooled. At this time, the indoor EC
U61 controls the number of revolutions (rpm) of the electric fan 23 based on the deviation between the set temperature Ts and the room temperature Tr, and the inlet side refrigerant temperature Tfi and the outlet side refrigerant temperature Tfo of the indoor heat exchanger 21.
The valve opening amount of the electric expansion valve 25 (the number of steps of the valve body driving step motor) is controlled so that the deviation between and becomes a predetermined value (for example, 0 to 1 ° C.). The gas refrigerant vaporized in the indoor heat exchanger 21 is transferred from the refrigerant pipe 45 to the outdoor units 7-1 to 7-3.
The gas flows into the accumulator 39 via the four-way valve 33 and the refrigerant pipe 46, and is sucked into the compressor 31 again from the refrigerant pipe 47.

During the heating operation, the outdoor ECU 91
Thus, the four-way valve 33 is switched as shown by the broken line. As a result, the high-temperature high-pressure gas refrigerant discharged from the compressor 31 releases the heat of condensation in the indoor heat exchanger 21 to become a liquid refrigerant, and then flows into the outdoor heat exchanger 35 to remove the latent heat of vaporization from the outside air. Will be absorbed.

The operation of this embodiment will be described below.

In this embodiment, the indoor units 5-1 to 5-n are used.
In the assembling process, standard operating settings according to capacity and specifications are written in the EEPROM 73 of the indoor side ECU 61 by a ROM lighter or the like installed in the assembly line.
This makes it possible to share a control board among a plurality of models, facilitates production control, inventory control, and the like, and realizes cost reduction due to mass production.

When installing the air conditioning system in the building, the installation operator adapts each indoor unit 5-1 to 5-n to the conditions of the installation space (amount of suspended dust, required values of temperature and humidity, etc.). Therefore, an air filter may be attached or replaced, or a retrofit optional device such as a heater may be attached. At this time, the installation operator uses the remote controller 9 to correspond to the type of air filter and the mounting of the heater.
Change the operation setting in M73. This work is possible when the piping work with each outdoor unit 7-1 to 7-3, the wiring work of the power supply and the communication line, etc. are completed and the automatic address by the centralized controller 1 is also finished. In the embodiment, the procedure described below can be performed when the indoor units 5-1 to 5-n are installed.

When the operation settings are changed when the indoor units 5-1 to 5-n are installed, the installer, as shown in FIG. , Indoor unit 5-1) and remote control 9 together
Connect to one-to-one. That is, the outdoor units 7-1 to 7-3 and other indoor units 5-2 to 5-n are not connected via the bus line 3, and other indoor units are connected via the remote control line 4. Do not connect to 5-2 to 5-n. In the figure, reference numeral 151 is a power supply line for supplying electric power (in the present embodiment, single-phase 200 V) to the indoor unit 5-1.

When electric power is supplied to the indoor unit 5-1 and the operation / stop switch 137 of the remote controller 9 is turned on, the remote controller side ECU 93 sets the address unset shown in FIGS. 6 and 7 at a predetermined control interval. Repeat the simple setting change subroutine at time. When this subroutine is started, the remote-control-side ECU 93 first reads the input information from each switch or the like in step S1 of FIG. 5, and then, in step S3, it is determined whether or not the test operation / inspection switch 137 has been turned on for 4 seconds or more. Judgment, this judgment is No
If negative, return to the start and repeat the process.

The installation operator performs a trial run / inspection switch 137.
Is pressed for 4 seconds or longer, and the determination in step S3 is Yes.
If (affirmative), the remote controller side ECU 93 shifts to the simple setting change mode, and in step S5, the remote controller line 4
To the indoor unit 5-1 and whether or not only the indoor unit 5-1 is connected based on the response to the output signal (that is, the outdoor units 7-1 to 7-3 and other indoor units 5- 2-5-n is not connected). Then, the remote-control-side ECU 93 makes this determination N.
If it is o, the control is stopped without performing any processing. If it is Yes, the "setting in progress" display 143 is blinked immediately above the setting data display 109 on the liquid crystal display 101 in step S7. At the same time, the remote controller ECU 93 turns on "ALL" in the system display 103 and the indoor unit display 105 in step S9, blinks "01" in the item code display 107 in step S11, and further displays the setting data display 109 in step S13. Blinking "0001". This display indicates that the setting of the control parameter related to the item code 01 is set to 1 for the indoor unit 5-1 to which the remote controller 9 is connected, and the blinking of the display indicates that the setting change has not been completed. Is shown.

Next, the remote controller ECU 93 determines in step S15 of FIG. 7 whether any of the temperature setting switches 127 and 129 has been pressed. Then, if the determination is Yes, the remote-control-side ECU 93 determines in step S
At 17, the item code display 107 is switched based on the stored information in the ROM 69 of the indoor ECU 61. For example, the remote-control-side ECU 93 uses the temperature setting switch 127 on the rising side.
When is pressed, the display of “01” is switched in order (→ “02” → “03” → “04”) according to the number of times of pressing,
When the temperature setting switches 127 and 129 on the descending side are pressed, the reverse order (→ “04” → “03”) is performed according to the number of times of pressing.
→ "02" → "01"). FIG. 8 shows a state in which the second system No. 3 is selected and the item code 01 is displayed on the liquid crystal display 101.

In the present embodiment, the first control parameter group relating to the simple setting change is composed of five kinds of control parameters, and as shown in the table of FIG. 9, the control parameter of the item code 01 is the filter life. And item code 0
2 control parameters are in centralized address, item code 03
The control parameter of No. 4 corresponds to the intake temperature shift during heating, and the control parameter of item code 04 corresponds to the heater switching.

The filter life is set according to the presence or absence of the air filter and the type thereof. In the setting data, 0 means no air filter is attached, and 1 to 4 indicate 15
It means that various air filters having a life of 0 to 10000 hours are mounted, and 5 means that the life is detected by the clogging sensor. When the setting data is 1 to 4, the corresponding time elapses, and when the setting data is 5, the indoor ECU 61
The remote controller side ECU 93 turns on the filter replacement lamp 133 according to the detection result of the clogging sensor input from. The initial operation setting (default value) of filter life corresponds to the air filter that is installed as standard in the indoor unit, and is set when the installation operator replaces the air filter with another one. Changes are made.

The centralized address relates to the group control by the centralized controller 1, and the setting data is
1 to 64 mean that each group is a master unit (concentration 1 to concentration 64), and 99 means a slave unit (undecided), and the default value is 99. When the setting data is 1 to 64, the indoor unit receives the group control command from the centralized controller 1 and transmits the control command to other indoor units in the group.

The intake temperature shift during heating is set when the value detected by the intake temperature sensor is different from the actual room temperature in a ceiling-embedded type or the like. Regarding the setting data, 0-10 is 0-10 ° C. Means The default value of the intake temperature shift during heating is preset according to the type and capacity of the indoor unit, and when the installation height of the indoor unit differs from the standard, predetermined setting data is selected and the room temperature control At that time, it is used as a correction value.

The heater switching is set when the optional heater is mounted. In the setting data, 0 means the unmounted state, 1 means the mounted state, and the default value is 0. When the setting data is 1, the indoor ECU 61 controls the energization of the optional heater as needed.

When the processing of step S17 is completed, the remote controller side ECU 93 next determines in step S19 whether either of the timer time switches 117 and 119 has been pressed. Then, if this determination is Yes, the remote controller side ECU 93 determines the control parameter for changing the operation setting in step S21 (switches the item code display 107 from blinking to lighting), and then in step S23, the indoor side E
The setting data display 109 is switched based on the stored information in the ROM 69 of the CU 61. For example, the remote controller ECU 9
3, when the timer timer switch 117 on the increasing side is pressed, the display of "0001" is sequentially performed according to the number of times of pressing (→
When the timer time switch 118 on the decreasing side is pressed by switching from “0002” → “0003” → “0004” ...) In reverse order (→ “0005” → “0” according to the number of times of pressing.
004 ”→“ 0003 ”→“ 0002 ”...). FIG. 10 shows a state in which the item code 01 is selected and the setting data 3 is displayed on the liquid crystal display 101.

On the other hand, if the determination in step S19 is No, the remote-control-side ECU 93 determines in step S25 whether or not the cancel switch 123 has been pressed. If Yes, the simple setting change is stopped in step S27. .

When the processing of step S23 is completed, the remote-control-side ECU 93 next determines in step S29 whether or not the set switch 121 has been pressed, and this determination is Yes.
If so, the setting data is confirmed in step S31.
(The setting data display 109 is switched from blinking to lighting.) On the other hand, if the determination in step S29 is No, it is determined in step S33 whether or not the cancel switch 123 is pressed, and if Yes, the setting is performed in step S35. After the data is returned to the default value, the simple setting change is stopped in step S37.

Upon completion of the processing of step S31, the remote controller ECU 93 determines in step S39 whether or not the test drive / inspection switch 137 has been pressed again. If the determination is Yes, the setting is changed in step S41 (that is,
After executing a command for rewriting the operation settings in the EEPROM 73 to the indoor side ECU 61), the subroutine is ended. FIG. 11 shows the liquid crystal display 101 immediately after the simple setting change is completed, but each display changes from blinking to lighting, and the “setting in progress” display 143 is also turned off.
After that, by returning to the normal remote control mode and operating each switch, a predetermined display is performed on the liquid crystal display 101.

Next, the detailed setting change in this embodiment will be described. Since the procedure is almost the same as the simple setting change, only the difference will be described.

The detailed setting change is intended for a service worker or the like having specialized knowledge, and various problems may occur if the setting worker or the like makes it easy. Therefore, the remote-control-side ECU 93 shifts to the detailed setting change mode only when the set switch 121 and the cancel switch 123 are also turned on for 4 seconds or more at the same time as the test operation / inspection switch 137 in step S3 of FIG. The other procedure is the same as that of the simple setting change subroutine, but in the case of the present embodiment, the second control parameter group related to the detailed setting change is composed of five kinds of control parameters and is shown in the table of FIG. As described above, the control parameter of the item code 10 is the indoor unit type, the control parameter of the item code 11 is the indoor unit capacity, the control parameter of the item code 12 is the system address, the control parameter of the item code 13 is the indoor unit address, The control parameters of item code 14 correspond to the group settings, respectively.

The indoor unit type is related to the installation type of the indoor unit, and in the setting data, 0 to 6 mean a one-way ceiling type or a wall hanging type. Normally, the indoor unit type cannot be changed, but if the control board is damaged, the control board of another indoor unit is diverted or the repair control board is used. It is necessary to change the setting of the indoor unit type.

The indoor unit capacity relates to the rated capacity of the indoor unit, and in the setting data, 1 to 23 mean 22 to 560 horsepower. As with the indoor unit type, the setting of the indoor unit capacity also needs to be changed when the control board is diverted or the repair control board is used.

The system address, indoor unit address, and group setting are used when changing the address or parent-child setting given by the automatic address.

As described above, in this embodiment, the indoor side EC
Since the operation settings of various control parameters are stored in the EEPROM 73 of the U61 and the operation settings can be changed by using the setting data in the ROM 69 by appropriately operating the remote controller 9, it is possible to realize common control boards. At the same time, work at height is no longer required when changing operation settings. Further, when the operation settings in the ROM 69 are displayed on the liquid crystal display 101 of the remote controller 9, the item codes and the setting data are encoded (an integer in the range of 0 to 99). It is now possible to respond to data changes and additions.

This concludes the description of the specific embodiment.
The present invention is not limited to the above embodiments.
For example, in the above-described embodiment, the remote controller is used to change the operation setting, but a dedicated setting changing terminal or the like may be used. Further, in the above-described embodiment, the control parameters are divided into the first control parameter group related to the simple setting change and the second control parameter group related to the detailed setting change. It may be divided into the above. Further, not only the display form at the time of changing the operation setting but also the specific device configuration, control procedure and the like can be appropriately changed without departing from the gist of the present invention.

[0048]

As described above, according to the air conditioner of the invention of claim 1, at least one outdoor unit and a plurality of indoor units are connected via the first communication line, The indoor unit and the external signal input means are connected via a second communication line, and after the address is set for each indoor unit, the signal input means can communicate and control the indoor unit. In the air conditioner, the control unit of the indoor unit includes a first storage unit rewritably storing operation settings for at least one control parameter, and a set data group including a plurality of set data. Second storage means stored for each parameter, and an operation for updating the operation setting stored in the first storage means in response to an input signal from the signal input means. Setting operation updating means, wherein the operation setting updating means has the signal input means connected to a single indoor unit through the second communication line, and the indoor unit is an outdoor unit and another indoor unit. When the indoor unit is not connected, the operation setting is updated according to the input signal even if the address setting for the indoor unit has not been completed. By writing the settings, a common control board can be formed between the indoor units of different models, and the installation operator or the like can appropriately operate the signal input means, so that the setting data in the second storage means can be used in the first storage means. It is possible to update the operation settings of the above, and it becomes possible to easily and quickly perform the setting change work when the indoor unit is installed.

According to the invention of claim 2, claim 1
In the air conditioner, the first storage means stores the operation setting for each of the plurality of control parameters divided into the plurality of control parameter groups, and the signal input means includes the respective control parameter groups. Since the operation setting updating means is accessed by a different procedure for each, for example, the first control parameter group in which each control parameter can be updated relatively freely and the second control parameter that does not normally need to be updated. By dividing into a group, the first control parameter group can be easily accessed by the installation worker, and the second control parameter group can be accessed only by the service worker in a predetermined procedure.
It is possible to prevent problems caused by easy setting changes.

Further, according to the invention of claim 3, claim 1
Alternatively, in the air conditioner of No. 2, since the signal input unit is provided with a display unit and the display unit displays the setting data stored in the second storage unit in an encoded state. For example, even when the item code and the setting data are changed or added, the same signal input means can be used.

According to the invention of claim 4, claim 1
In the air conditioners Nos. 3 to 3, since the signal input means is a remote controller attached to the indoor unit, a dedicated setting change terminal device or the like is not necessary.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an entire air conditioning system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a device configuration in an indoor unit and an outdoor unit.

FIG. 3 is an explanatory diagram showing a configuration of an indoor ECU.

FIG. 4 is a front view showing a display / operation unit of the remote controller.

FIG. 5 is an explanatory diagram showing a connection state between an indoor unit and a remote controller.

FIG. 6 is a flowchart showing a procedure of a simple setting change subroutine.

FIG. 7 is a flowchart showing a procedure of a simple setting change subroutine.

FIG. 8 is an explanatory diagram showing a display on a liquid crystal display of a remote controller.

FIG. 9 is an explanatory diagram showing a display on a liquid crystal display of the remote controller.

FIG. 10 is a table showing setting data and the like of a first control parameter group.

FIG. 11 is an explanatory diagram showing a display on the liquid crystal display of the remote controller.

FIG. 12 is an explanatory diagram showing a display on a liquid crystal display of a remote controller.

FIG. 13 is a table showing setting data and the like of a second control parameter group.

[Explanation of symbols]

1 Centralized controller 3 bus lines 5-1 to 5-n indoor unit 7-1 to 7-3 Outdoor unit 7-1 to 7-3 9 Wired remote controller 61 Indoor ECU 63 CPU 69 ROM 73 EEPROM 93 Remote control ECU 101 LCD display

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 11/02 102 F24F 11/02 103

Claims (4)

(57) [Claims] 1. At least one outdoor unit and a plurality of indoor units are connected via a first communication line, and the indoor unit and external signal input means are connected via a second communication line. Further, in the air conditioner capable of communicating / controlling the indoor unit by the signal input means after further address setting for each indoor unit, at least one control is provided in the control means of the indoor unit. First storage means for rewritably storing operation settings for parameters, and second storage means for storing a setting data group consisting of a plurality of setting data for each control parameter,
A driving setting updating unit that updates the driving setting stored in the first storage unit in response to an input signal from the signal input unit;
Connected to a single indoor unit via the communication line of
In addition, when the indoor unit is not connected to the outdoor unit and other indoor units, it is possible to update the operation setting according to the input signal even if the address setting for the indoor unit is not completed. A characteristic air conditioner. 2. The operation setting updating means stores the operation setting for each of a plurality of control parameters divided into a plurality of control parameter groups by the first storage means when the operation setting is updated, and The air conditioner according to claim 1, wherein the signal input means accesses the operation setting updating means by a different procedure for each control parameter group. 3. The signal input means is provided with a display section, and the display section displays the setting data stored in the second storage means in an encoded state. The air conditioner according to claim 1. 4. The air conditioner according to claim 1, wherein the signal input means is a remote controller attached to the indoor unit.