JPH09280633A - Method for automatically setting address of air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an address to be accurately set by a method wherein an operating time of a compressor is changed in response to a surrounding air temperature when an address is set in an indoor device in response to a cooperative relation between the indoor device where a temperature of a heat exchanger shows a variation more than a predetermined temperature difference across an operation of the compressor and an outdoor device performed the operation. SOLUTION: Control systems of each of the outdoor devices 1 to 3 and the indoor devices 4 to 16 are connected by a communication line 17 and they can be controlled by remote controllers 18 to 27. When an address is set to each of the indoor devices, an optional outdoor device, for example, the outdoor device 2 is operated for heating operation when an air conditioning system is installed, refrigerant is circulated to the indoor heat exchangers of each of the indoor devices 5 to 8 belonging to the refrigerant system of the outdoor device 2 so as to detect a variation in temperature in the device. Then, an address is assigned to each of the indoor devices storing the heat exchanger indicating a predetermined variation in temperature. In this case, a variation value of temperature at the heat exchanger corresponding to the surrounding air temperature is applied for discriminating a variation in temperature of the heat exchanger in setting address so as to enable a more accurate address setting to be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system including one or a plurality of outdoor units and a plurality of indoor units, and a control system connected to each other through the same communication wiring. The present invention relates to a method of automatically setting an address indicating an attribute of the indoor unit in each indoor unit.

[0002]

2. Description of the Related Art Generally, an air conditioning system for a large building or the like uses a plurality of outdoor units and a configuration in which each of the outdoor units is further combined with a plurality of indoor units. Since these outdoor units and indoor units are operated independently or in cooperation with each other, it is necessary to interlock the control system. Therefore, communication lines are wired to the control systems of the outdoor units and the indoor units to transmit necessary data to the control systems.

However, in the conventional system, a communication line is wired between the outdoor unit and the indoor unit for each outdoor unit (that is, for each refrigerant system), and the communication line is wired for each refrigerant system. Doing so leads to an increase in the number of wirings and complication, which causes wiring mistakes and the like during system installation. Therefore, a system has been proposed in which the control system of each outdoor unit and indoor unit is connected by one communication line.

In such a system, since a plurality of outdoor units and indoor units are connected to one communication line, it is necessary to clarify the correspondence between the outdoor unit and the indoor units, and to clarify this correspondence. Therefore, an address, which is an identification code for identifying the room itself, is set for each indoor unit. Normally, this address is set when the system is installed, but manual setting by an installer may cause a setting error, so automatic setting is required.

Conventionally, as an automatic address setting method, the compressor of the outdoor unit is operated to supply the refrigerant to the indoor unit side for the address setting, and the heat exchanger temperature before and after the operation of the compressor exceeds a predetermined temperature difference. A method is known in which a changed indoor unit is detected and an address is set in each indoor unit (see Japanese Patent Laid-Open No. 6-147605).

[0006]

However, the change of the heat exchanger temperature to be detected in the address setting in the above-mentioned method depends on the season or the outside air temperature, the position of the indoor unit, or the length of the refrigerant pipe for each indoor unit. The time required to reach the temperature difference to be detected is not necessarily uniform in each indoor unit due to the influence of the system configuration such as the difference in temperature, etc. Time) is required to be controlled.

As described above, in the automatic setting of the address, it is desired to perform fine control in consideration of the outside air temperature and the like.

An object of the present invention is to provide an automatic address setting method for an air conditioning system which can accurately set an address in consideration of a variable element such as the outside air temperature.

[0009]

The invention according to claim 1 has one or a plurality of outdoor units and a plurality of indoor units, and the same control system for each of the outdoor units and the indoor units is used for communication. In the air conditioning system connected via wiring, when the compressor in the outdoor unit was operated and the refrigerant was supplied to the indoor unit side, the heat exchanger temperature changed by a predetermined temperature difference or more before and after the operation of the compressor. In the method of setting an address to the indoor unit based on the correspondence between the indoor unit and the outdoor unit that has performed the operation, the operating time of the compressor is changed according to the outside air temperature. According to the first aspect of the present invention, by changing the operating time of the compressor according to the outside air temperature, it is possible to reliably change the heat exchanger temperature to be detected without being affected by the change in the outside air temperature. It becomes possible to detect, and the reliability of address setting can be improved.

The invention according to claim 2 has one or a plurality of outdoor units and a plurality of indoor units, and the control systems of the respective outdoor units and indoor units are connected via the same communication wiring. In the air conditioning system, when the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the operation are In the method of setting an address to the indoor unit based on the correspondence relationship with the outdoor unit, the outdoor blower or the indoor unit so that the necessary high pressure is forcibly generated on the high pressure side of the compressor after the compressor is started. It is characterized in that the number of revolutions of the blower is changed according to the outside air temperature. According to the invention as set forth in claim 2, for example, when the pressure sensor on the high pressure side is not provided and it is not possible to determine whether or not the required high pressure is generated, as in a gas heat pump type air conditioning system, By changing the number of revolutions (or the amount of blown air) of the outdoor blower or the indoor blower according to the outside air temperature, it is possible to theoretically force the control mode to generate high pressure.

The invention according to claim 3 has one or a plurality of outdoor units and a plurality of indoor units, and the control systems of the respective outdoor units and indoor units are connected via the same communication wiring. In the air conditioning system, when the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the operation are It is characterized in that an address is set to the indoor unit based on the correspondence with the outdoor unit. According to the invention of claim 3, in the case of the air conditioning system using the outdoor unit in which the compression capacity cannot be controlled,
By determining the control mode of the blower of the outdoor unit and / or the indoor unit according to the outside air temperature, it is possible to suppress an excessive rise of the pressure (high pressure side) in the compressor at the time of address setting due to heating operation especially in midsummer. It is possible to secure safety and reliability.

The invention according to claim 4 has one or a plurality of outdoor units and a plurality of indoor units, and the control systems of the respective outdoor units and indoor units are connected via the same communication wiring. In the air conditioning system, when the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the operation are In the method of setting an address in the indoor unit based on the performed correspondence with the outdoor unit, the mechanical valve opening of the indoor unit is determined according to the outside air temperature at the start of address setting. According to the third aspect of the present invention, by determining the mechanical valve opening degree of the indoor unit according to the outside air temperature, particularly for an air conditioning system using the outdoor unit in which the compression capacity cannot be controlled, It is possible to suppress an excessive rise in the pressure (high pressure side) in the compressor at the time of address setting due to the heating operation in midsummer, and ensure safety and reliability.

According to a fifth aspect of the present invention, in the address setting method according to the fourth aspect, the mechanical valve opening of the indoor unit is determined according to the discharge temperature of the compressor. According to the invention as set forth in claim 5, a mode is shown in which the control of the mechanical valve opening degree of the indoor unit is determined according to the discharge temperature of the compressor.

The invention according to claim 6 has one or a plurality of outdoor units and a plurality of indoor units, and the control systems of the respective outdoor units and indoor units are connected through the same communication wiring. In the air conditioning system, when the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the operation are In the method of setting an address to the indoor unit based on the performed correspondence with the outdoor unit, a predetermined temperature difference of the heat exchanger temperature is changed according to the outside air temperature. According to the invention of claim 6,
Since the predetermined temperature difference of the heat exchanger temperature is changed according to the outside air temperature, it is possible to clarify the determination that the temperature of the heat exchanger has risen. In other words, when the outside air temperature is low, in an air conditioning system in which the refrigerant pipe is long and the indoor / outdoor capacity ratio exceeds 100%, the high pressure is difficult to rise, so it is determined whether the heat exchanger temperature has risen to the outside air temperature. Depending on the case, the rise judgment is clarified, and it becomes possible to reliably detect the change of the heat exchanger temperature that should be detected without being affected by the change of the outside air temperature, and the reliability of the address setting is improved. Can improve.

The invention according to claim 7 has one or a plurality of outdoor units and a plurality of indoor units, and the control systems of the respective outdoor units and indoor units are connected via the same communication wiring. In the air conditioning system, when the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the operation are In the method of setting an address to the indoor unit based on the correspondence relationship with the outdoor unit, the mechanical valve opening degree of the indoor unit where the heat exchanger temperature has changed is the mechanical valve opening degree of the indoor unit that has not changed. It is characterized by narrowing down rather than. According to the invention of claim 7, the mechanical valve opening degree of the indoor unit in which the heat exchanger temperature has changed is narrowed down more than the mechanical valve opening degree of the indoor unit in which the heat exchanger temperature has not changed. The mechanical valve of the indoor unit where the temperature of the heat exchanger has risen is supposed to cause poor flow distribution of the refrigerant due to the The refrigerant can be flowed to. This makes it possible to homogenize the refrigerant circulation and reliably detect changes in the heat exchanger temperature that should be detected without being affected by structural differences in the refrigerant piping, etc. Can improve the sex.

The invention described in claim 8 is the invention according to claims 1 to 7
In the automatic address setting method for an air conditioning system described in (3), when the temperature change of the indoor heat exchanger before and after the start and stop of the operation of the compressor is large, or the temperature of the indoor heat exchanger after the operation of the compressor is a predetermined value (58). A method of setting a condition for setting an address equal to or higher than ℃) is provided.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings.

(I) Configuration of Air Conditioning System FIG. 1 shows the configuration of the air conditioning system according to the present invention. This air conditioning system includes a plurality (three in FIG. 1) of outdoor units 1.
To 3 and a plurality (13 in FIG. 1) of indoor units 4 to 16. Further, the air conditioning system is grouped for each of the outdoor units 1 to 3, and includes a refrigerant system including the outdoor unit 1 and the indoor unit 4, a refrigerant system including the outdoor unit 2 and the indoor units 5 to 8, and the outdoor unit 3. A refrigerant system including the indoor units 9 to 16 is constructed.

The control systems of the outdoor units 1 to 3 and the indoor units 4 to 16 are connected by a single communication line 17, and a bus system is adopted as a signal transmission system.

Reference numerals 18 to 27 are remote controllers, and the remote controller 18 includes the outdoor unit 1 and the indoor unit 4.
The remote controller 19 controls the operation of the air conditioning system including the outdoor unit 2 and the indoor units 5 to 8, and controls the operation of the air conditioning system including the remote controller 2
0 to 27 control the operation of the indoor units 9 to 16, respectively.

FIG. 2 shows the configuration of a refrigerant system including the outdoor unit 2 and the indoor units 5 to 8 as an example of the detailed configuration of one refrigerant system. As shown in FIG. 2, one end side of the heat exchanger 40 of the outdoor unit 2 is connected to one end side of each indoor heat exchanger 50 of the indoor unit 5 to the indoor unit 8 via the four-way valve 41 and the compressor 42. It is connected by 77.

The outdoor unit 2 has a fan 44 for blowing air to the outdoor heat exchanger 40 and an outdoor air temperature sensor 45 for measuring the outdoor air temperature.
And a CPU (microcomputer) as control means
43. The CPU 43 receives the detected temperature signal of the outside air temperature sensor 45, the data sent via the communication wiring 17, and the like, and comprehensively controls the driving of the motor of the fan 44 and the operation inside the outdoor unit 2.

It is assumed that the indoor units 5 to 8 have the same structure, and the same parts are designated by the same reference numerals.
Each of the indoor units 5 to 8 includes a temperature detection sensor 59 that detects the temperature of the indoor heat exchanger 50, a CPU (microcomputer that constitutes a control system) 53, a fan 54 that blows air to the indoor heat exchanger 50, and the outdoor unit 2. It has a mechanical valve 58 for adjusting the amount of refrigerant circulation from the. The CPU 53 is the temperature detection sensor 5
The temperature detection signal of 9 and the data sent via the communication wiring 17 are received, and the indoor units 5 to 8 such as the drive of the motor of the fan 54 and the opening of the mechanical valve 58 are comprehensively controlled. The mechanical valve 58 is capable of adjusting the valve opening degree, and is connected to a refrigerant pipe 51 arranged between the indoor heat exchanger 50 and the outdoor heat exchanger 40.

(II) Indoor Unit Address Setting Method Next, an automatic address setting method for each indoor unit of the air conditioning system will be described.

<A> Basic Procedure FIG. 3 shows a basic procedure for address setting in this embodiment. That is, at the time of installation of the air conditioning system, an arbitrary outdoor unit (for example, the outdoor unit 2) is heated (step S100), and each indoor unit (for example, 5 to 8) belonging to the refrigerant system of the outdoor unit 2 is heated. By circulating the refrigerant through the indoor heat exchanger 50, the temperature change of the indoor heat exchanger 50 is detected (step S101). At this time, an address that is an identification code for identifying the indoor unit that has the indoor heat exchanger 50 showing a predetermined temperature change is assigned (step S102). This procedure is repeatedly executed for all the outdoor units in one refrigerant system (step S103). Similarly, the following steps S100
The procedures of No. 103 to No. 103 are sequentially executed for each refrigerant system. The above address setting procedure is automatically performed by the address setting program stored in the CPU of any outdoor unit. The reason why the heating operation is used as the operation mode when setting the address is that the heating operation has a larger temperature change range than the cooling operation, and therefore it is clear that the presence or absence of the temperature change is fixed. This is because the setting is highly reliable. However, when the temperature change width can be wide, it is possible to set the address in the cooling operation mode, and the range of the present invention is not particularly limited.

<B> Detailed Procedure FIGS. 4 and 5 show detailed procedures of the address setting method according to the present invention.

First, when the above-mentioned address setting procedure is executed, what is characteristic of the present invention is that the temperature change of the heat exchanger temperature according to the outside air temperature is mainly used for the determination of the temperature change of the indoor heat exchanger in the address setting. This is the point where the change value is adopted. In this embodiment, the following control methods are included as control methods for reflecting the outside air temperature.

The operating time of the compressor is changed according to the outside air temperature (step S3, see FIG. 6). The number of rotations of the outdoor blower or the indoor blower during the address setting control is changed according to the outside air temperature (step S
32, S17, S35, S37, S32, see FIG. 8).

The indoor unit blowing mode at the start of the address setting control is determined (step S7, see FIG. 7).

The mechanical valve opening of the indoor unit at the start of the address setting control is determined (step S2, FIG. 7).

Heat Exchanger Changes a predetermined temperature difference.

Next, an automatic address setting procedure will be described with reference to FIG. When the automatic setting of the address is started, the CPU of the outdoor unit detects the outside air temperature by the outside air temperature sensor (step S1). Based on the outside air temperature, the CPU of the outdoor unit determines, as operating conditions, a change in the temperature of the indoor heat exchanger that indicates that the refrigerant has circulated, that is, a “determined temperature difference ΔT”, an “indoor unit blowing mode”, and an “indoor unit mechanism”. The number of valve pulses (step number of pulse motor = valve opening degree) ”is determined and transmitted to the CPU of the indoor unit via the communication line 17. At this time, as the data of the "indoor unit air blowing mode" and "the number of indoor unit mechanical valve pulses, two types of data are transmitted when the temperature of the indoor heat exchanger rises and when it does not rise.

Next, the CPU of the outdoor unit determines the operating time spent for setting the automatic address according to the detected outside air temperature. Specifically, the operating time of the compressor is determined according to the outside air temperature (step S3).

Next, the CPU of the indoor unit sets the operating conditions ("temperature difference ΔT to be judged", "indoor unit ventilation mode", "number of indoor unit mechanical valve pulses") transmitted from the outdoor unit (( Step S4).

Next, the CPU of the indoor unit takes in the temperature Ti of the indoor heat exchanger at this time and stores it in the built-in memory (step S5).

After that, it waits for an appropriate time (for example, 3 minutes) (step S6).

Next, after the standby time has elapsed, the initial mode of the indoor blower is determined according to the outside air temperature (step S).
7). This determination is performed, for example, in the manner shown in FIG. In FIG. 7, LL indicates a light wind, L indicates a weak wind, and H indicates a strong wind, which corresponds to the rotation speed of the blower fan.

Next, the operation of the compressor of the outdoor unit is started (step S8), and then a predetermined time (for example, 30 seconds) is waited for (step S9). When this 30 seconds has elapsed, the process proceeds to step S10. On the other hand, it is confirmed whether or not the protective device is activated before the lapse of 30 seconds (step S2).
8) If the number of times the protective device has been actuated has reached the specified number, an alarm is displayed and the process ends (steps S29, 3).
0, 31).

Next, the CPU of the indoor unit takes in the temperature of the indoor heat exchanger of the indoor unit and sends it to the CPU of the outdoor unit via the communication line 17 (step S10).

Next, the CPU of the outdoor unit confirms the rising state of the temperature of the indoor heat exchanger (step S11), and if it rises too much, lowers the outdoor blower mode by one mode (step S32, see FIG. 8). Next, the rising state of the compressor discharge temperature is confirmed (step S12), and if it rises too much, the indoor mechanical valve pulse is increased to open the valve (step S33, see FIG. 8), and the compressor high pressure side Suppress pressure rise.

Next, the temperature of the heat exchanger of the indoor unit is taken in and it is judged whether or not the temperature has changed by a predetermined temperature difference ΔT or more (step S13). If there is no temperature change equal to or greater than the predetermined temperature difference ΔT, the process proceeds to step S14. On the other hand, when there is a temperature change equal to or more than the predetermined temperature difference ΔT, the operating conditions are set to the operating conditions “indoor unit ventilation mode” and “indoor unit mechanical valve pulse number” when the indoor heat exchanger temperature rises ( Step S34), the process proceeds to step S14 (connector 1
reference).

Here, the "indoor unit mechanical valve pulse number" in the operating condition when the indoor heat exchanger temperature rises is smaller than the "indoor unit mechanical valve pulse number" when the temperature has not yet risen. The mechanical valve opening will be reduced. That is, it is assumed that the heat splitting temperature of the indoor units rises due to the fact that the refrigerant diversion failure may occur due to the difference in horsepower between the indoor units 5 to 8, the height difference of the mounting positions, the difference in the length of the refrigerant pipes, and the like. This is because the opening of the mechanical valve 58 of each of the machines 5 to 8 is narrowed to reduce the opening of the mechanical valve 58 of the other indoor unit in which the temperature does not rise so that the refrigerant flows more to the indoor unit side where it is difficult to flow.

Next, referring to FIG. 5, in step S14, it is checked again whether or not the protective device is in operation for fail-safe operation (step S14).
If the protection device is operating, the process jumps to step S28 (see connector T), and steps S28 to S31 described above.
Is performed. If the protective device is not operating, the process proceeds to step S15.

In step S15, it is confirmed whether "step 1" seconds have elapsed. This "step 1" second confirmation corresponds to warm-up operation, and is for increasing the temperature of the indoor heat exchanger while preventing a sudden increase in high pressure. The process returns to S10 (see connector A). When the time has elapsed, the process proceeds to step S16.

Next, in step S16, it is judged whether or not the current outdoor unit blow mode is the maximum rank, and if it is the maximum rank, the indoor blower mode is lowered by one rank (step S35, FIG. 8, H → L). reference). If it is not the maximum, the outdoor blower mode is raised by one rank (step S17).

Next, the outdoor unit CPU detects whether or not the temperature of the indoor heat exchanger has risen by a predetermined temperature ΔT or more (step S18). If there is a temperature change of ΔT or more, the indoor blower mode and the number of mechanical valve pulses are set to the values of the operating conditions when the heat exchanger temperature rises (step S3
6) and proceeds to step S19. When the temperature difference of ΔT or more does not occur, the process directly proceeds to step S19.

Here, for fail-safe operation, it is again checked whether or not the protective device is in operation (step S19). If the protection device is operating, jump to step S26. Steps S26, 27 and 3
Item 9 will be described later. If the protection device is not operating, the process proceeds to step S20.

In step S20, it is confirmed whether "step 2" seconds have elapsed. This “step 2” second confirmation is for increasing the high pressure from “step 1” to raise the indoor heat exchanger temperature in order to perform automatic addressing more reliably, and when the time has not elapsed. To return to step S18 (see connector C). When the time has elapsed, the process proceeds to step S21.

In step S21, it is judged whether or not the current outdoor unit blow mode is the maximum rank, and if it is the maximum rank, the indoor blower mode is lowered by one rank (step S37, see FIG. 8, H → L), If it is not the maximum, the outdoor blower mode is raised by one rank (step S2).
2), the process proceeds to step S23.

Next, the outdoor unit CPU detects whether the temperature of the indoor heat exchanger has risen by a predetermined temperature ΔT or more (step S23). If there is a temperature change of ΔT or more, the indoor blower mode and the number of mechanical valve pulses are set to the values of the operating conditions when the heat exchanger temperature rises (step S3
6) and proceeds to step S19. When the temperature difference of ΔT or more does not occur, the process directly proceeds to step S19.

Here, for fail-safe operation, it is checked again whether or not the protective device is operating (step S124). If the protection device is operating, jump to step S26. If the protection device is not operating, the process proceeds to step S25.

In step S25, it is confirmed whether "step 3" seconds have elapsed. The confirmation of the passage of this "step 3" seconds is to increase the high voltage further than "step 2" and to perform automatic address more reliably,
If the time has not elapsed, the process returns to step S23 (see connector D) and the processes of steps S23, 24, 38 and 25 are repeated.

If the operation of the protective device is detected as a result of the check in step S24, or if "step S3" seconds have elapsed as a result of the check in step S25, the process proceeds to step S26.

In step S26, the number of indoor units in which the temperature of the outdoor heat exchanger has risen (that is, the indoor unit in which the temperature has changed) is counted, and the corresponding number of indoor units is set in each outdoor unit. It is confirmed whether the number of aircraft has been reached.
If the numbers do not match, an alarm is displayed (step S39) and the process ends. On the other hand, when the number of indoor units that have risen in temperature has reached the number of indoor units set for the outdoor units, it means that the temperature rise of the specified number of indoor units has been confirmed, so the address settings for each indoor unit are confirmed. (Step S27), a series of processing ends.

(III) Modifications The present invention is not limited to the above embodiment,
Various modifications are possible.

For example, in the above address setting procedure, in order to detect the temperature change (rise) of the indoor heat exchanger, the change ΔTi in the heat exchanger temperature after the refrigerant is supplied is changed to the heat exchanger temperature Ti before the refrigerant is supplied. Although the addition method is used (see steps S13, 18 and 23), instead of this, use the judgment criterion that the absolute temperature of the indoor heat exchanger has reached a predetermined value (for example, 58 ° C.) or more. Is possible. In the case of this aspect, the absolute temperature of the indoor heat exchanger is determined by the heat exchanger temperature sensor 5 in steps S13, S18 and S23.
9 and compares the detected value T with a predetermined determination reference value Tref (T ≧ Tref).

[0057]

As described above, according to the first aspect of the present invention, by changing the operating time of the compressor according to the outside air temperature, the heat to be detected without being affected by the change in the outside air temperature. It becomes possible to reliably detect the change in the temperature of the exchanger, and the reliability of address setting can be improved.

According to the second aspect of the present invention, it is not possible to determine whether or not the required high pressure is generated because the high pressure side pressure sensor is not provided as in the gas heat pump type air conditioning system. In addition, by changing the number of revolutions (or the amount of blown air) of the outdoor blower or the indoor blower according to the outside air temperature, it is possible to theoretically force the control mode to generate high pressure.

According to the third aspect of the invention, in the case of the air conditioning system using the outdoor unit in which the compression capacity cannot be controlled, the control mode of the blower of the outdoor unit and / or the indoor unit is set to the outside air temperature. According to the determination, it is possible to suppress an excessive rise in the pressure (high pressure side) in the compressor at the time of address setting due to the heating operation especially in the midsummer, and ensure safety and reliability.

According to the fourth aspect of the present invention, by determining the mechanical valve opening degree of the indoor unit according to the outside air temperature, the air conditioning system using the outdoor unit in which the compression capacity cannot be controlled. In particular, it is possible to suppress an excessive rise in the pressure (high pressure side) in the compressor at the time of address setting due to the heating operation in the midsummer, and ensure safety and reliability.

According to the fifth aspect of the invention, there is shown a specific mode in which the control of the mechanical valve opening degree of the indoor unit is determined according to the discharge temperature of the compressor.

According to the sixth aspect of the invention, since the predetermined temperature difference of the heat exchanger temperature is changed according to the outside air temperature, it is possible to clarify the judgment that the temperature of the heat exchanger has risen. . That is, when the outside air temperature is low, the refrigerant pipe is long,
Moreover, in an air conditioning system in which the indoor / outdoor capacity ratio exceeds 100%, the high pressure is unlikely to rise, so the rise determination is clarified by classifying whether or not the heat exchanger temperature has risen according to the outside air temperature. The change in the heat exchanger temperature to be detected can be reliably detected without being affected by the change in the outside air temperature, and the reliability of address setting can be improved.

According to the invention as set forth in claim 7, since the mechanical valve opening degree of the indoor unit in which the heat exchanger temperature has changed is narrower than the mechanical valve opening degree of the indoor unit which has not changed, the horsepower of the indoor unit can be reduced. Assuming that the split flow of the refrigerant may occur due to the difference in size,
The mechanical valve of the indoor unit in which the temperature of the heat exchanger has risen can cause the refrigerant to flow to the indoor unit in which it is difficult to flow by narrowing the opening of the mechanical valve of the other indoor units. This makes it possible to homogenize the refrigerant circulation and reliably detect changes in the heat exchanger temperature that should be detected without being affected by structural differences in the refrigerant piping, etc. Can improve the sex.

According to the invention of claim 8, claim 1
In the automatic address setting method of the air conditioning system according to any one of 1 to 7, when the temperature change of the indoor heat exchanger before and after the start and stop of the operation of the compressor is large, or the temperature of the indoor heat exchanger after the operation of the compressor is a predetermined value. When the temperature is higher than (58 ° C.), a method of setting the condition for setting the address is provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an air conditioning system to which the present invention is applied.

FIG. 2 is a block diagram showing a part of a refrigerant system and a control system in the air conditioning system of FIG.

FIG. 3 is a flowchart showing a basic procedure of automatic address setting.

FIG. 4 is a procedure (first half) of automatic address setting according to the present invention.
It is a flowchart which shows.

FIG. 5 is a flowchart of an automatic address setting procedure according to the present invention (the latter half of the flowchart).

FIG. 6 is an explanatory diagram showing a specific example of a judgment temperature difference corresponding to the outside air temperature.

FIG. 7 is an explanatory diagram showing a specific example of a judgment temperature difference corresponding to the outside air temperature.

FIG. 8 is an explanatory diagram showing a specific example of the judgment temperature difference corresponding to the outside air temperature.

[Explanation of symbols]

 1 to 3 outdoor unit 4 to 16 indoor unit 17 communication line 40 outdoor heat exchanger 42 compressor 43 outdoor unit CPU 44 outdoor unit blower fan 45 outdoor air temperature sensor 50 indoor heat exchanger 53 indoor unit CPU 54 indoor unit blower fan 58 Mechanical valve 59 Indoor heat exchanger temperature sensor

Claims (8)

[Claims] 1. An air conditioning system having one or a plurality of outdoor units and a plurality of indoor units, wherein the control systems of the respective outdoor units and indoor units are connected via the same communication wiring, When the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the correspondence between the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the outdoor unit in which the operation is performed. A method for setting an address in the indoor unit based on a relationship, wherein an operating time of the compressor is changed according to an outside air temperature, an automatic address setting method for an air conditioning system. 2. An air conditioning system having one or a plurality of outdoor units and a plurality of indoor units, wherein the control systems of the outdoor units and the indoor units are connected via the same communication wiring, When the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the correspondence between the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the outdoor unit in which the operation is performed. In the method of setting the address to the indoor unit based on the relationship, after the compressor is started, the rotation speed of the outdoor blower or the indoor blower is adjusted so that the high pressure necessary for the high pressure side of the compressor is forcibly generated. A method for automatically setting an address of an air conditioning system, which is characterized in that it is changed according to. 3. An air conditioning system having one or a plurality of outdoor units and a plurality of indoor units, wherein the control systems of the outdoor units and the indoor units are connected via the same communication wiring, When the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the correspondence between the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the outdoor unit in which the operation is performed. In the method of setting an address to the indoor unit based on a relationship, at the time of starting the address setting, the control mode of the blower of the outdoor unit and / or the indoor unit is determined according to the outside air temperature. Automatic address setting method. 4. An air conditioning system comprising one or a plurality of outdoor units and a plurality of indoor units, wherein the control systems of the outdoor units and the indoor units are connected via the same communication wiring. When the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the correspondence between the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the outdoor unit in which the operation is performed. In the method of setting an address to the indoor unit based on a relationship, the mechanical valve opening of the indoor unit at the time of starting the address setting control is determined according to the outside air temperature, the address automatic setting method of the air conditioning system . 5. The address of an air conditioning system according to claim 4, wherein the mechanical valve opening of the indoor unit at the start of the address setting control is determined according to the discharge temperature. Automatic setting method. 6. An air conditioning system comprising one or a plurality of outdoor units and a plurality of indoor units, wherein the control systems of the outdoor units and the indoor units are connected via the same communication wiring. When the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the correspondence between the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the outdoor unit in which the operation is performed. A method for setting an address in the indoor unit based on a relationship, wherein a predetermined temperature difference of the heat exchanger temperature is changed in accordance with an outside air temperature. 7. An air conditioning system comprising one or a plurality of outdoor units and a plurality of indoor units, wherein the control systems of the outdoor units and the indoor units are connected via the same communication wiring. When the compressor in the outdoor unit is operated and the refrigerant is supplied to the indoor unit side, the correspondence between the indoor unit in which the heat exchanger temperature changes by a predetermined temperature difference or more before and after the operation of the compressor and the outdoor unit in which the operation is performed. In the method of setting an address to the indoor unit based on a relationship, the mechanical valve opening degree of the indoor unit in which the heat exchanger temperature has changed is narrower than the mechanical valve opening degree of the indoor unit that has not changed. Automatic air conditioning system address setting method. 8. The air conditioner automatic address setting method according to claim 1, wherein the temperature change of the heat exchanger is judged based on the absolute temperature of the heat exchanger. System address automatic setting method.