JP2001280673A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which facilitates combining an indoor unit with an outdoor unit and can finely control the operation of a compressor to realize a good air conditioning. SOLUTION: The air conditioner comprises an indoor unit 3 having an indoor controller 9 wherein a maximum and minimum operating frequencies fmax, fmin are set, and an outdoor unit 2 having an outdoor controller 8 and a compressor 4 wherein the operating frequency range between a maximum and minimum operating frequencies Fmax, Fmin are previously set. The controller 8 controls the maximum and minimum operating frequencies fmax, fmin of the indoor unit 3 transmitted from the indoor controller 9 to meet the operating frequency range of the compressor 4, and reads a required instructed operating frequency f transmitted from the indoor controller 9 as a real operating frequency Frel corresponding to the operating frequency range in an air conditioning operation, thus operating the compressor 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split-type air conditioner that performs a predetermined air-conditioning operation by changing the operating frequency of a compressor.

[0002]

2. Description of the Related Art As is well known, in a conventional split-type air conditioner called an inverter air conditioner, an indoor unit installed in a room where air conditioning is performed and an outdoor unit are set to a room temperature to be set and an actual room temperature. An operation command based on the room temperature is transmitted, and the compressor is operated at the corresponding operation frequency according to the operation command so that the actual room temperature becomes the set room temperature.

The operation command from the indoor unit and the operation of the compressor corresponding to the operation command are as follows. That is, in the first method called the step code method, the operating frequency range of the compressor is set to 16 in advance.
When the number of steps selected from the 16 steps, for example, step 10, is selected from the relationship between the set room temperature and the actual room temperature, the indoor unit is transmitted to the outdoor unit and transmitted to the outdoor unit. The compressor is operated at the operating frequency corresponding to step 10.

In a second system called a frequency code system, the operating frequency of the compressor is calculated from the relationship between the set room temperature and the actual room temperature in the indoor unit, and this is calculated from the indoor control unit of the indoor unit to the outdoor control unit of the outdoor unit. An operation frequency command is transmitted to the compressor, and the compressor is operated at the operation frequency commanded directly from the indoor control unit.

[0005] However, in the above-mentioned prior art, there is a possibility that the following problems may occur. For example, in the first method, the preset number of steps of the compressor is 1
The operating frequency can be selected only within the operating frequency range determined by the six steps, the operation of the compressor cannot be finely controlled, and good room temperature control cannot be realized.

In the second method, the compressor is operated directly at the operating frequency commanded by the indoor control unit of the indoor unit. Therefore, in some cases, the outdoor unit becomes incompatible with the command of the indoor unit. There is a possibility that it will be. For this reason, in order to perform proper operation, it is necessary to combine both units in consideration of compatibility, and the selection range of the indoor unit with respect to the outdoor unit is narrowed.

Further, when a plurality of indoor units are connected to one outdoor unit to perform air conditioning in a plurality of rooms, for example, in the case of two rooms, the indoor unit for two rooms and in the case of three rooms , Such as indoor units for three rooms, it is necessary to connect those with different specifications of operation instructions according to the number of indoor units to be connected, and prepare indoor units of several types Did not.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to realize good room temperature control by enabling fine control of operation of a compressor. It is another object of the present invention to provide an air conditioner in which the capability of combining an indoor unit and an outdoor unit does not occur even if the compatibility is not taken into consideration and the combination of both units is easy.

[0009]

An air conditioner according to the present invention comprises:
An indoor unit in which a maximum operating frequency and a minimum operating frequency are set, an indoor control unit provided in the indoor unit, an outdoor unit having a compressor in which an operating frequency range is set in advance, and an indoor unit provided in the outdoor unit And the outdoor control unit causes the maximum operation frequency and the minimum operation frequency of the indoor unit transmitted from the indoor control unit to relatively correspond to the maximum value and the minimum value of the operation frequency of the compressor. Along with the air conditioning operation, the required command operation frequency transmitted from the indoor control unit is replaced with the actual operation frequency corresponding to the operation frequency range, and the compressor is operated by operating the compressor. Further, the operation frequency of the compressor changes stepwise at predetermined frequency intervals, and the operation frequency of the compressor approximates the frequency obtained by replacing the command operation frequency. The compressor is operated with the state operating frequency as the actual operating frequency, and the indoor unit in which a predetermined code indicating the air conditioning capacity and the maximum operating frequency and the minimum operating frequency are set. An indoor control unit provided in the indoor unit, an outdoor unit having a compressor, and an outdoor control unit provided in the outdoor unit in which the operating frequency range of the compressor corresponding to the code is set in advance. , In the outdoor control unit,
Based on the code of the indoor unit, the maximum operating frequency and the minimum operating frequency transmitted from the indoor control unit, the required command operating frequency transmitted during the air conditioning operation from the indoor control unit is set to the operating frequency range of the compressor. It is characterized by performing the operation of the compressor by reading the corresponding actual operating frequency, furthermore, the outdoor control unit of the outdoor unit,
When the indoor unit has a fixed operating frequency range during operation of a plurality of indoor units and a plurality of indoor units are connected to the outdoor unit, the outdoor control unit of the outdoor unit performs air conditioning operation. On the basis of the actual operating frequency read for each indoor unit, the compressor is operated by being replaced with the actual operating frequency corresponding to the fixed operating frequency range of the compressor. It is.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment will be described with reference to FIGS. FIG. 1 is a diagram showing a schematic configuration, FIG. 2 is a diagram for explaining how to read an operating frequency between an indoor unit and an outdoor unit, and FIG. 3 is a flowchart of operation control.

1 to 3, an air conditioner 1 includes:
An outdoor unit 2 installed outdoors and an indoor unit 3 installed in a room where air conditioning is performed. A compressor 4 and an outdoor heat exchanger (not shown) provided in the outdoor unit 2 and an electronic expansion valve 5 Further, an indoor heat exchanger (not shown) provided in the indoor unit 3 is connected so as to form a refrigeration cycle, and by switching the refrigerant flow direction, cooling and heating of the room in which the indoor unit 3 is installed can be performed. It has become. The outdoor unit 2 is provided with an outdoor fan 6 for promoting heat exchange of the outdoor heat exchanger, and the indoor unit 3 is provided with an indoor fan 7 for promoting heat exchange of the indoor heat exchanger.

On the other hand, both units 2 and 3 are provided with an outdoor controller 8 and an indoor controller 9, respectively, for operating the refrigeration cycle. That is, the transmitting and receiving unit 10 for transmitting and receiving the control signal to and from the indoor control unit 9 is connected to the outdoor control unit 8 provided in the outdoor unit 2, and the memory 11 can exchange data. Connected. Further, a motor of the compressor 4, a motor of the electronic expansion valve 5, and a motor of the outdoor fan 6 are connected to the outdoor control unit 8 to control their driving.
Reference numeral 12 denotes a temperature sensor for measuring an outdoor temperature.

The indoor control unit 9 includes the indoor unit 3.
A receiving unit 15 and a room temperature sensor 16 for receiving operation start and operation end commands transmitted from an operation setting unit 14 of a remote controller 13 provided outside and setting contents such as a room temperature, an air volume, and a wind direction set by a user. The memory 17 is connected so that data can be exchanged.

Further, a motor of the indoor fan 7 is connected to the indoor control section 9 so as to control the driving thereof. A transmission / reception unit 18 for transmitting / receiving a control signal to / from the outdoor control unit 8 is also connected to the indoor control unit 9, and the outdoor control unit 8 is configured to execute the content set by the remote controller 13. Sent. In addition, 1
Reference numeral 9 denotes a display unit for displaying the setting contents and the operation status.

The outdoor unit 2 and the indoor unit 3
In order to control the operation of the compressor 4, the outdoor unit 2 and the indoor unit 3 are installed so that control signals can be transmitted and received. The transmission / reception units 10 and 18 are automatically connected, and settings are made to execute operation control described below performed between the outdoor control unit 8 and the indoor control unit 9.

That is, as shown in FIG. 2, for example, the maximum operation frequency f _max is 80 Hz and the minimum operation frequency f _min
Is the indoor unit 3 of 20 Hz, the maximum operation frequency F _max of the built-in data is 110 Hz, and the minimum operation frequency F _{min is}
Is connected to the outdoor unit 2 having a frequency of 10 Hz, the maximum value and the minimum value of the operating frequency of the indoor unit 3 correspond to the maximum value and the minimum value of the operating frequency of the outdoor unit 2 in the outdoor control unit 8, respectively. Is stored as Also, based on the maximum and minimum values of the operating frequency of the indoor unit 3, the center operating frequency f _cen. 50Hz
Is calculated. The center operation frequency 50 Hz of the indoor unit 3 calculated at the same time is the center operation frequency F _{cen. Of the} outdoor unit 2 calculated from the maximum value and the minimum value of the operation frequency of the outdoor unit 2 _. Are stored as those corresponding to 60 Hz.

Furthermore, in the outdoor control unit 8, the indoor frequency variation width _w 1 of the indoor unit _{3 (w 1 = f cen.} -
f _min ) and the outdoor frequency fluctuation width w of the outdoor unit 2
₂ (w ₂ = F _cen. -F _min ), the variation width ratio C
(C = w ₂ / w ₁ ) is calculated. Thus, the outdoor control unit 8, when the driver commanded frequency from the indoor unit 3 is assumed to be f, and the operation frequency command by rereading the actual operating frequency F _{r el} based on each calculated value of the compressor 4
The operation control of is executed. The command operation frequency f is replaced with the actual operation frequency F _rel in the case of f ≦ f _cen. , F _rel = F _cen. − (F _cen. −f) × C f> f _cen. , F _rel = F _cen. + (F−f _cen. ) × C

As a result, for example, if the command operation frequency f from the indoor unit 3 is 30 Hz, the outdoor unit 2
In the outdoor control unit 8, the actual operation frequency F _rel is replaced by the actual operation frequency F _rel , and the calculated actual operation frequency F _rel is 26.66.
The operation of the compressor 4 is performed by Hz. The compressor 4
When the operating frequency of the compressor 4 continuously changes, the operation at the calculated value is performed. However, when the operating frequency of the compressor 4 is step-wise, for example, in steps of 0.1 Hz, rounding or the like is used. The actual operation frequency F _rel is calculated, and the compressor 4 is operated with 26.6 Hz as the actual operation frequency F _rel .

The operation control performed by the outdoor control unit 8 and the indoor control unit 9 is performed according to a flowchart shown in FIG. That is, the temperature was set to desired the remote controller 13, switching on the operation start of the air conditioner 1 in the first step S _11, performs power-on.

Subsequently, a second step S₁₂Now, power on
When connected, the outdoor unit 2 and the indoor unit 3 are electrically connected.
And the maximum operating frequency of the indoor unit 3 to the outdoor control unit 8.
Number f _max80Hz and minimum operating frequency f_minOf 20
Hz is read. In addition, these values and outdoor unit
Maximum operating frequency F of knit 2_max110Hz, minimum
Operating frequency F_minFrom 10 Hz,
And the center operating frequency f of the indoor unit 3_cen., Outdoor
Center operating frequency F of knit 2_cen.And the variation width ratio C
After performing the calculation, the third step S₁₃Proceed to
No.

[0022] In the third step S _13, a determination whether the drive command is received from the indoor unit 3 side of the compressor 4 is performed. When the driving command is received, the process proceeds to the fourth step S _14, the actual operating frequency F of the command operation frequency f
_rel is performed in the order of the above-described replacement. For example, if the command operation frequency f from the indoor unit 3 is 3
In the case of 0 Hz, the actual operating frequency F
_rel of 26.6 Hz is obtained.

[0023] Then, the process proceeds to a fifth step S _15, and outputs a drive signal for starting the operation of the compressor 4. Then, the operation of the compressor 4 starts at the fourth is the actual operating frequency _{F rel} calculated in step _{S 14} 26.6Hz, determination of the presence or absence of the operation end command in the sixth step _{S 16} follows is made, O and there The operation of the compressor 4 is continued until it is determined.
Although not shown, if you like the temperature of the room to be air-conditioning is changed changes the command operation frequency f from the indoor control unit 9 again fourth step S ₁₄ in the new instruction operation frequency f
The actual operating frequency F _rel corresponding to the replacement by obtained, to continue the operation by this new actual operating frequency F _rel.

When the operation of the air conditioner 1 does not need to be continued and the operation of terminating the operation is performed by the remote controller 13, a command to terminate the operation is transmitted to the outdoor control unit 8 via the indoor control unit 9, and the outdoor operation in the sixth step S ₁₆ is ended by the operation end instruction from the control unit 8.

Since the air conditioner 1 is operated as described above, the maximum operating frequency f _max of the indoor unit 3 is 80 Hz and the minimum operating frequency f _min is 20 H
z, the compressor 4
Of the actual operating frequency F _rel of the maximum operating frequency F _max to 1
The operation frequency is read continuously or almost continuously to a corresponding operation frequency between 10 Hz and 10 Hz of the minimum operation frequency _Fmin , so that fine operation control of the compressor 4 can be performed and good room temperature control can be performed. be able to.

Further, since the compressor 4 is not directly operated at the command operation frequency f, there is no possibility that the outdoor unit 2 becomes inconsistent with the command of the indoor unit 3 in terms of performance. The selection of the indoor unit 3 to be combined with the outdoor unit 2 is also easy because it is not necessary to strictly consider the suitability.

Next, a second embodiment will be described with reference to FIGS. 4 is a diagram showing a schematic configuration, FIG. 5 is a diagram showing a horsepower code indicating an air conditioning capacity of an indoor unit and a performance rank, and FIG. FIG. 7 is a diagram showing the minimum operation frequency, FIG. 7 is a diagram showing the maximum / minimum operation frequency of the outdoor unit for each operation mode during multi-room operation, and FIG. 8 is a flowchart of the operation control.

4 to 8, reference numeral 21 denotes an air conditioner, reference numeral 22 denotes an outdoor unit installed outdoors,
23a and 23b are indoor units installed in the A and B rooms for performing air conditioning. The air conditioner 21 has two indoor units 23a, one outdoor unit 22 so as to air-condition the rooms A and B individually or simultaneously.
23b.

The air conditioner 21 includes a compressor 24 provided in an outdoor unit 22, an outdoor heat exchanger (not shown), an electronic expansion valve 25, and an indoor unit 2 further connected thereto.
The indoor units 23a and 23b are connected to an indoor heat exchanger (not shown) provided in each of the indoor units 23a and 23b by switching the refrigerant flow direction.
Cooling operation and heating operation of the room where b is installed can be performed. Note that the outdoor unit 22 is provided with an outdoor fan 26 that promotes heat exchange of the outdoor heat exchanger, and the indoor units 23a and 23b are provided with an indoor fan 27 that promotes heat exchange of the indoor heat exchanger. I have.

On the other hand, the outdoor unit 22 and the indoor unit 2
In 3a and 23b, in order to operate the refrigeration cycle,
The outdoor control unit 28 and the indoor control units 29a and 29b are respectively provided.
Are provided. Then, the outdoor control unit 28 provided in the outdoor unit 22 has a plurality of connection terminals 30 transmitting and receiving unit 30 is connected with a _T, these connecting terminals 30 _T each indoor unit connected to the corresponding ones of 23
a, each of the indoor control unit 29a of 23b, and 29b and the outdoor control unit 28, and performs transmission and reception of control signals via a connection terminal 30 _T. Further, the outdoor control unit 28
, A memory 31 is connected so that data can be exchanged. Further, a motor of the compressor 24 and a motor of the electronic expansion valve 25 and an outdoor fan 26 are connected to the outdoor control unit 28. The drive is controlled. In addition, 32 is a temperature sensor for measuring the outdoor temperature.

The indoor control units 29a and 29b include operation setting units 34a and 34a of corresponding remote controllers 33a and 33b provided outside the indoor units 23a and 23b.
Receivers 35a and 35b for receiving operation start and operation end commands transmitted from the controller 34b and setting contents such as a room temperature, an air volume, and a wind direction set by a user are connected to room temperature sensors 36a and 36b, and a memory 37a. , 37b are connected so that data can be exchanged. Further, the indoor fans 27a, 27b are provided in the indoor control units 29a, 29b.
Motors are connected, and their driving is controlled.

The indoor control units 29a and 29b also
Transmission / reception units 38a and 38b for transmitting and receiving control signals to / from the outdoor control unit 28 are connected, and the control signals are transmitted to the outdoor control unit 28 so that the contents set by the remote controllers 33a and 33b are executed. 39a, 39
Reference numeral b denotes a display unit for displaying the setting contents and the driving status.

Then, between the outdoor unit 22 and the indoor units 23a and 23b, both are installed and connected, so that the outdoor unit 22 and the indoor units 23a and 23b are connected.
Are automatically connected, and the compressor 24 is connected between the outdoor control unit 28 and the indoor control units 29a and 29b.
And a control signal for controlling the operation of the motor of the outdoor fan 26, the electronic expansion valve, and the like.

The operation control performed by the outdoor control unit 28 is a relative value control, in which the command operation frequency f (r) commanded by the indoor control unit of the connected indoor unit is set within the operation frequency range of the outdoor unit 22. Accordingly, the actual operating frequency F _rel (r) during single-room operation and F
_rel (n) is read and the operation is performed. For example, the maximum operating frequency f having one value of the horsepower code p shown in FIG.
_max (m, r), minimum operating frequency f _min (m, r)
When the indoor units 23a and 23b are connected, the operation is as follows. The description of the symbols will be described later.

In response to the command operating frequencies f (a) and f (b) from the indoor units 23a and 23b, for example, in the single-room operation in which only the A-room is operated, the operation mode m and the horsepower code shown in FIG. p and the maximum operating frequency F when one indoor unit is connected, indicating the operating frequency range of the outdoor unit 22
_max (m, p), minimum operating frequency F _min (m, p)
From the equation, the actual operating frequency F
_rel (a) is calculated, and the compressor 24 is operated. In the two-room operation, the maximum operation frequency F _max (m, n) when many indoor units are connected, indicating the operation mode m, the horsepower code p and the operation frequency range of the outdoor unit 22 shown in FIGS. Minimum operating frequency F
_The actual operating frequency F _rel (2) is calculated from _min (m, n) and the like in the following expression, and the compressor 24 is operated.

The replacement process at this time is based on the following equations.
Is calculated. That is, (1) the actual operating frequency F in the single-room operation_rel(R) is calculated by F_rel(R) = [{(F_max(M, p))-(F_min(M, p)) × (f (r) −f_min(M, r)} / (f_max(M, r) -f_min(M, r))] + F_min(M, p) ... <1> formula (2) Actual operating frequency F in multi-room operation_relThe calculation of (n) is [i] ΣF_rel(R) ≧ F_max(M, n), F_max(M, n)> ΣF _min For (m, p), F_rel(N) = F_max(M, n) 《<< 2 >> formula [ii] ΣF_rel(R) <F_max(M, n), F_max(M, n)> ΣF _min For (m, p), F_rel(N) = {(α × α) / (F_max(M, n) -F_min(M, n))} + F_min(M, n) ... << 3 >> Equation where α = {(F_max(M, n))-(F_min(M, n)) × (ΣF_rel (R) -ΣF_min(M, p)} / (F_max(M, n) -ΣF_min(M, p))... << 4 >> Formula [iii] F_max(M, n) ≦ ΣF_minFor (m, p), F_rel(N) = F_max(M, n)... << 5 >> Equation is calculated.

The symbols used in the above equations are f (r): a command operating frequency commanded by the indoor unit f _max (m, r): the maximum operating frequency of the indoor unit f _min (m, r): Minimum operating frequency of the indoor unit _Fmax (m, p): Maximum operating frequency of the outdoor unit with respect to the horsepower code when one indoor unit is connected _Fmin (m, p): Outdoor unit with respect to the horsepower code when one indoor unit is connected Operating frequency F _max (m, n): maximum operating frequency of the outdoor unit when many indoor units are connected F _min (m, n): minimum operating frequency F _rel (r) when many indoor units are connected ): actual operating frequency F _rel when one indoor unit connection _(n): the operating frequency at the indoor unit number block connection m: operating mode cooling operation mode De ... c, heating operation mode ... h r: room A room air conditioner ... a, B chamber ... b, C chamber ...
c,... p: Horsepower code indicating air conditioning capacity 0 to F n: Number of rooms to be air-conditioned 2, 3, 4,.

Then, the operation control flow in the outdoor control unit 28 is performed.
The flowchart is as shown in FIG. First, the first step
Top S₂₁Turn on the switch to start operation and turn on the power.
U. Subsequent second step S₂₂Then, when the power is turned on, the outdoor unit
The knit 22 and the indoor unit connected thereto are electrically connected.
Connected and transmitted from indoor unit to outdoor control unit 28
Operating frequency f of the indoor unit_max(M,
r), minimum operating frequency f _min(M, r), operation mode
m, the horsepower code p and the operating frequency range of the outdoor unit 22
Reading of the box is performed.

Next in a third step _{S 23,} the compressor 24
Then, it is determined whether or not a drive command of the command operation frequency f (r) or f (n) from the indoor unit side has been received. If a drive command has been received, a fourth step S
_Proceeding to ₂₄ , the command operation frequency f (r) or f (n)
Operating frequency F _rel (r) or F _rel (n)
Is performed according to the above-described equations.

[0040] Then, the process proceeds to a fifth step _{S 25,} and outputs a drive signal for starting the operation of the compressor 24. Then, the operation of the compressor ₂₄ is controlled by the actual operation frequency F _rel (r) or F _rel (n) calculated in the fourth step _S24.
In Start, the determination of whether the operation end command in the sixth step S ₂₆ follows is made to continue the operation of the compressor 24 until it is determined that there is. Although not shown, when the instruction operation frequency f from the indoor control unit and the like the temperature of the room is changed to an air conditioner (r) or f (n) is changed, a new command operation frequency in the fourth step S ₂₄ again f (r) or f
The actual operating frequency F _rel (r) or F _rel (n) corresponding to (n) is obtained by replacement, and the operation is continued at the new actual operating frequency F _rel (r) or F _rel (n).

Then, when it is no longer necessary to continue the operation,
Command operation end from the indoor control unit is transmitted to the outdoor control unit 28, the operation in the sixth step S ₂₆ is ended by the operation end instruction from the outdoor control unit 28.

More specifically, the indoor units 23a and 23b connected to the outdoor unit 22 having the outdoor control unit 28 for performing such operation control are different from the indoor unit 23a installed in the room A, for example. It is assumed that the maximum operating frequency f _max (m, r) at which the horsepower code is 2 and the performance rank is 0.75 HP is 100 Hz, and the minimum operating frequency f _min (m, r) is 15 Hz. Also, the indoor unit 23b installed in the room B has a horsepower code of 5 and a maximum operating frequency f _max (m, r) of 1.5 HP with an ability rank of 120 HP.
It is assumed that the minimum operating frequency f _min (m, r) is 10 Hz.

[0043] Then, when performing the cooling operation of only one room A chamber turn operates the operation setting unit 34a of the remote controller 33a of the indoor unit 23a installed in A chamber as a first step S _21. This allows the second
In step _{S 22,} the operation mode of the indoor unit 23a transmitted from the indoor control unit 29a to the outdoor control unit 28 by connecting the outdoor unit 22 and the indoor units 23a m
Cooling operation mode c maximum operation frequency f _max (m, a)
100 Hz, the minimum operating frequency f _min (m, a) 1
5 Hz, 2 of the horsepower code p is read, and further, based on the read horsepower code, the maximum operating frequency F _max of the outdoor unit 22 when one unit is connected, which is the operating frequency range of the outdoor unit 22 for the horsepower code p of 2 5 of (m, 2)
0 Hz, 10 Hz at the minimum operating frequency F _min (m, 2)
Are read from the memory 31.

[0044] Then, the process proceeds to a third step _{S 23,} 40 Hz of the detected room temperature from the command operation frequency f of the set temperature and the room temperature sensor 36a to the operation setting section 34a (a) is calculated by the indoor control unit 29a Then, a drive command at the command operation frequency f (a) of 40 Hz is transmitted from the indoor unit 23a to the outdoor control unit 28.

[0045] Then, in the fourth step _{S 24} the replacement of the outdoor control unit 28 processing is performed, the actual operating frequency F
_rel (a) is calculated. This will replacing the values in the "1" type, _F rel (a) = [{(50) - (10) × (40-15)} / (100-15) ] + 10 = 21.76 next , The actual operating frequency F
_rel (a) is 21.8 Hz is the command operating frequency f (a)
Is read as a frequency corresponding to 40 Hz.

The subsequent In a fifth step _{S 25,} the drive signal is output, the replacement was the actual operating frequency _F rel (a)
Of starts the compressor 24 is operated at 21.8Hz, operation up to the sixth is the operation end command in step S ₂₆ of continues, carried out such that the cooling operation in the room A by the indoor unit 23a becomes the set temperature .

On the other hand, when performing the cooling operation of the two rooms A and B, the operation setting section 34a of the remote controller 33a of the indoor unit 23a installed in the room A and the remote control of the indoor unit 23b installed in the room B are performed. operating the operation setting unit 34b of the controller 33b as a first step _{S 21} to turn.

[0048] Thus the second in step _{S 22,} the outdoor unit 22 and the indoor unit 23a, the indoor control unit 29a by connecting the 23b, the outdoor from 29b control unit 28
Operating frequency f of the indoor unit 23a transmitted to
_max (m, a) of 100 Hz, minimum operating frequency f
The maximum operating frequency F _max (m, 2) of the outdoor unit 22 when one is connected, which is the operating frequency range of the outdoor unit 22 for 15 Hz of _min (m, a), 2 of the horsepower code p, and 2 for the horsepower code p And the minimum operation frequency F _min (m, 2) of 10 Hz and the maximum operation frequency f _max (m, b) of the indoor unit 23b of 120 Hz.
Hz, 10 Hz of the minimum operating frequency f _min (m, b),
5 horsepower codes p, 60 Hz of more horsepower code maximum operating frequency of the outdoor unit 22 of one time of connection is an operating frequency range of the outdoor unit 22 to the fifth _{p F ma x (m, 5} ), the minimum operating frequency _{F min} 10m of (m, 5)
Each value of z and the cooling operation mode c of the operation mode m are read.

[0049] Then, the process proceeds to a third step _{S 23,} the set temperature and the room temperature sensor 3 to the operation setting unit 34a, 34b
From the room temperature detected by 6a and 36b, the command operation frequency f
30 Hz of (a) and 50 Hz of f (b) are calculated by the indoor control units 29a and 29b, and the indoor units 23a and 23b are calculated.
From b, 30 Hz of command operation frequency f (a) and f (b)
Is transmitted to the outdoor control unit 28.

[0050] Then, in the fourth step _{S 24} the replacement of the outdoor control unit 28 processing is performed, the actual operating frequency F
_rel (2) is calculated. This is first of the above << 1 >>
Substituting each value of the indoor units 23a and 23b into the equation, F _rel (a) when one indoor unit 23a is connected,
F _rel (b) when one indoor unit 23b is connected
Are calculated respectively. That is, F _rel (a) = [{(50) − (10) × (30−15)} / (100−15)] + 10 = 17.06 F _rel (b) = [{(60) − (10 ) × (50−15)} / (120−10)] + 10 = 25.9.

Further, the conversion variable α in the indoor unit 22 is calculated by the above equation <4> by using the maximum operation frequency F _max (c, 2) and the minimum operation frequency F _min ( c, 2), the above calculated values and the values of the indoor units 23a and 23b are substituted to obtain the values. α = {(95−15) × ((17.06 + 25.9) − (10 + 10))} / (95− (10 + 10)) = 1836.8 / 75 = 24.49

The actual operation frequency F _rel (2) is obtained by substituting the obtained conversion variable α and each value into the above equation <3>. That is, F _rel (2) = {(24.49 × 24.49) / (95−15)} + 15 = 22.50, and the actual operating frequency F
_{In rel} (2), 22.5 Hz is read as a frequency corresponding to 30 Hz of the command operation frequency f (a) of the indoor unit 23a and 50 Hz of the command operation frequency f (b) of the indoor unit 23b.

[0053] followed by the fifth step _{S 25,} the drive signal is output, the replacement was the actual operating frequency _F rel (2)
The compressor 24 starts operating at 22.5Hz, operation up to the sixth is the operation end command in step S ₂₆ of is continued, the cooling operation in the room A by the indoor units 23a, and chamber B by the indoor unit 23b Is performed so as to reach the set temperature.

Note that (F _rel (a) + F
_rel (b)) ≧ 95, the actual operation frequency F _rel (2) is set to 95 Hz and the compressor 24
Is performed.

With the above configuration, even if the air conditioner 21 is connected to the indoor units 23a and 23b having different capacities to the outdoor unit 22, there is no risk of inconsistency, and the air conditioner 21 can be freely connected. Can be combined. When the air conditioner 21 is operated, the indoor unit 23
a, a command operation frequency f (a), f commanded from 23b
In contrast to (b), actual operating frequencies F _rel (a), F (b)
Are read continuously so as to be properly distributed within the capacity range of the compressor 24, and fine operation control of the compressor 24 can be performed, and good room temperature control can be performed. Further, the combination of the outdoor unit 22 and the indoor units 23a and 23b can be easily performed without strictly considering compatibility.

[0056]

As is apparent from the above description, according to the present invention, even if the indoor unit and the outdoor unit are combined without particularly considering the compatibility of the two units and the like, the mismatch between the indoor unit and the outdoor unit can be maintained. This makes it possible to easily combine the compressors and to finely control the operation of the compressor, thereby achieving good room temperature control.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a first embodiment of the present invention.

FIG. 2 is a diagram shown to explain replacement of an operating frequency between an indoor unit and an outdoor unit in the first embodiment of the present invention.

FIG. 3 is a flowchart of operation control according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a schematic configuration of a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a horsepower code indicating an air conditioning capacity of an indoor unit and a performance rank according to a second embodiment of the present invention.

FIG. 6 is a diagram illustrating maximum and minimum operating frequencies of an outdoor unit with respect to a horsepower code of an indoor unit for each operation mode according to the second embodiment of the present invention.

FIG. 7 is a diagram showing the maximum and minimum operation frequencies of the outdoor unit for each operation mode during multi-room operation according to the second embodiment of the present invention.

FIG. 8 is a flowchart of operation control according to the second embodiment of the present invention.

[Explanation of symbols]

 2 outdoor unit 3 indoor unit 4 compressor 8 outdoor control unit 9 indoor control unit

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Satoru Okada 336 Tatehara, Fuji-shi, Shizuoka Prefecture Toshiba Carrier Co., Ltd.

Claims (4)

[Claims] An indoor unit in which a maximum operating frequency and a minimum operating frequency are set, an indoor control unit provided in the indoor unit, an outdoor unit having a compressor in which an operating frequency range is set in advance, An outdoor control unit provided in the outdoor unit, and the outdoor control unit sets the maximum operating frequency and the minimum operating frequency of the indoor unit transmitted from the indoor control unit to the maximum operating frequency of the compressor. Relative to the minimum value, and at the time of air conditioning operation, the required command operation frequency transmitted from the indoor control unit is replaced with the actual operation frequency corresponding to the operation frequency range to operate the compressor. An air conditioner characterized in that: 2. An operation frequency of the compressor, wherein an operation frequency of the compressor changes stepwise at predetermined frequency intervals, and a step operation frequency approximating a frequency obtained by replacing the command operation frequency is set as an actual operation frequency. The air conditioner according to claim 1, wherein the air conditioner is performed. 3. An indoor unit in which a predetermined code indicating an air conditioning capacity, a maximum operation frequency and a minimum operation frequency are set, an indoor control unit provided in the indoor unit, an outdoor unit having a compressor, and the code An outdoor control unit provided in the outdoor unit, the operating frequency range of the compressor corresponding to which is set in advance, and the outdoor control unit transmits the code of the indoor unit transmitted from the indoor control unit. Based on the maximum operating frequency and the minimum operating frequency, the required command operating frequency transmitted during the air conditioning operation from the indoor control unit is replaced with the actual operating frequency corresponding to the operating frequency range of the compressor. An air conditioner characterized by operating a compressor. 4. The outdoor control unit of the outdoor unit has a fixed operating frequency range of the compressor during operation of the plurality of indoor units, and the plurality of indoor units are connected to the outdoor unit. In the case, in the outdoor control unit of the outdoor unit, based on each actual operation frequency read for each indoor unit during the air conditioning operation, the actual operation corresponding to the fixed operation frequency range of the compressor is performed. The air conditioner according to claim 3, wherein the operation of the compressor is performed by reading the frequency.