JP2002206788A - Multi-chamber type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve amenity by distributing a part of a capacity of an indoor machine having no demand of quick change of an air-conditioning temperature to another indoor machine having the demand of quick change of the same. SOLUTION: In a multi-chamber type air conditioner wherein a compressor 3, a fan 9 and an expansion valve 10 are controlled at a predetermined period of time employing data obtained by an operation setting device 12a, a quick operation setting device 13a, a time counting device 30, a temperature difference operating device 22 and a rated capacity memory device 31, a temperature difference correcting value setting device for setting the correcting value of the temperature difference by the signal of the quick operation setting device 13a and the time counting device 30 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioning system in which a plurality of indoor units are connected to one outdoor unit, and the flow rate of refrigerant is controlled by an electric expansion valve.

[0002]

2. Description of the Related Art In recent years, a demand for a multi-room air conditioning system in which a plurality of indoor units are connected to one outdoor unit has been increasing in terms of outdoor space saving, exterior characteristics, and small power supply capacity. . Conventionally, in this multi-chamber air conditioning system, a refrigerant flow control device for controlling a refrigerant flow to each indoor unit is provided in a liquid side refrigerant pipe of a refrigeration cycle using a variable capacity (frequency) compressor, and an outdoor unit is provided. A compressor that controls the compressor capacity by comparing the capacity of each indoor unit with the capacity of each indoor unit to control the flow rate of the refrigerant to each indoor unit has been proposed (for example, Japanese Patent Application Laid-Open No. 6-257827).

Hereinafter, the conventional multi-room air conditioning system will be described with reference to the drawings. FIG. 12 is a refrigeration cycle diagram of a conventional multi-room air conditioning system.
This multi-room air conditioning system includes one outdoor unit 102 and a plurality of indoor units, and in this conventional example, three indoor units 101a, 1
01b and 101c.

An outdoor unit 102 is provided with an inverter-driven variable frequency compressor 103 (hereinafter simply referred to as a compressor), an outdoor heat exchanger 104, a four-way valve 105 for switching between cooling and heating, and indoor units 101a and 101b. , 101c are provided with indoor heat exchangers 106a, 106b, 106c, respectively. The liquid side main pipe 107 is a liquid side branch pipe 107a, 1
07b and 107c. Each of the liquid side branch pipes has an electric expansion valve 108a, 108b, 108
c is provided. Indoor units 101a, 101b, 10
1c is connected to the liquid side branch pipes 107a, 107b, 107c and the gas side branch pipes 109a, 109b, 109c. In addition, each indoor unit 101a, 101b, 1
01c is an indoor temperature sensor 110a, 110b, 110c for detecting the room temperature of the room where each indoor unit is installed, and an operation setting device that can set an operation mode (cooling or heating) desired by the occupant, room temperature, operation and stop. 111a, 1
11b, 111c, and rapid operation setting devices 112a, 112b, 112c capable of setting rapid operation are provided.

In this refrigeration cycle, during cooling, the refrigerant discharged from the compressor 103 flows from the four-way valve 105 to the outdoor heat exchanger 104, where it exchanges heat with outdoor air to condense and liquefy. Then, it flows through the liquid side main pipe 107 and branches into liquid side branch pipes 107a, 107b, 107c inside the branching machine. Since the valve openings of the electric expansion valves 108a, 108b, 108c are controlled so as to be in accordance with the loads of the respective rooms, the refrigerant also has a low pressure at a flow rate corresponding to the respective loads, and the indoor heat exchange is performed. Vessels 106a, 106b, 10
6c, and after vaporization, the gas side branch pipes 109a,
09b, 109c, gas side main pipe 109, four-way valve 105
And is sucked into the compressor 103 again. Also, the compressor frequency is determined according to the total load.

At the time of heating, the refrigerant discharged from the compressor 103 switches the four-way valve 105 to branch from the gas side main pipe 109 to the gas side branch pipes 109a, 109b, 109c, and the indoor heat exchangers 106a, 106b, 106c. And is condensed and liquefied, and the pressure is reduced by the electric expansion valves 108a, 108b, 108c on the liquid side branch pipes 107a, 107b, 107c. The valve opening of the electric expansion valves 108a, 108b, 108c is controlled to an opening corresponding to the load of each room as in the case of cooling, so that the refrigerant also has a flow rate corresponding to the indoor heat exchanger 106a, After flowing through 106b and 106c, flowing through the outdoor heat exchanger 104 and evaporating, the refrigerant passes through the four-way valve 105 and is sucked into the compressor 103 again. Further, the compressor frequency is determined according to the total load as in the case of cooling.

Next, a method for controlling the compressor frequency and the electric expansion valve opening will be described. FIG. 13 is a block diagram showing a flow of control of the compressor frequency and the electric expansion valve opening, FIG. 14 is a temperature zone division diagram of a temperature difference ΔT between the room temperature Tr and the set temperature Ts, and FIG. 15 is a load table diagram. is there.

First, in the indoor unit 1a, the output of the indoor temperature sensor 110a is sent from the indoor temperature detecting device 113a to the differential temperature calculating device 114 as a temperature signal, and is set by the operation setting device 111a in the indoor temperature setting storage device 115. The determined set temperature and operation mode are determined and sent to the differential temperature calculating device 114. Here, the temperature difference ΔT (= Tr−T
s) is calculated and converted into a load number Ln value shown in FIG. For example, during cooling operation, T
Assuming that r = 26.3 ° C. and Ts = 26 ° C., the differential temperature ΔT =
Ln = 4 at 0.3 ° C.

However, Tr = 29.3 ° C. during cooling operation,
Assuming that Ts = 26 ° C., Ln = 8 at the temperature difference ΔT = 3.3 ° C.
However, when rapid operation is not set, the maximum load is limited to Ln = 7. Further, the rated capacity of the indoor unit 101a is stored in the rated capacity storage device 116.

The rapid operation setting device 112a can set a rapid operation for lowering the room temperature or increasing the room temperature in a short time at the start of the cooling operation, the dehumidifying operation or the heating operation.

The signal from the rapid operation setting device 112a is sent to the signal receiving device 117 and stored in the rapid operation setting storage device 118. These rated capacity signal, differential temperature signal, operation mode signal, rapid operation signal, etc.
From 19, the signal is sent to the signal receiving device 120 of the outdoor unit 102.
Similar signals are sent from the indoor units 101b and 101c to the signal receiving device 120. The signal received by the signal receiving device 120 sets the load constant from the load constant table 121 shown in FIG.
Determine the expansion valve opening.

As an example, a case where signals from the indoor units 101a, 101b, and 101c at the start of cooling operation will be described with reference to Table 1 below.

[0013]

[Table 1]

All air volumes are set to Me +.

For example, in the cooling operation, the room a is stopped and the room b Tr =
27.8 ° C., Ts = 26 ° C., Tr room Tr = 27.6 ° C., Ts
= 26 ° C., Ln = 7 at the temperature difference ΔTb = 1.8 ° C.,
Ln = 7 at the temperature difference ΔTc = 1.6 ° C., and the indoor unit 101
a, 101b, and 101c are 0, 2,.
5, 3.2 and therefore the frequency Hz of the compressor 4
Is given by: Hz = A × (0 + 2.5 + 3.2) = A × 5.7 where A is a constant.

The allowable operation value of the compressor 103 is
a, 2.0 corresponding to the rated capacity of 101b, 101c,
Assuming that the total value of 2.5 and 3.2 is 7.7, the frequency calculation result does not reach the allowable operation value of the compressor 103, and
A margin of 5% is left, and the calculation result is sent as a frequency signal to a compressor driving device (not shown) to control the frequency of the compressor 103. Thereafter, calculation is performed based on the rated capacity signal, the differential temperature signal, and the operation mode signal of each of the indoor units 101a, 101b, and 101c at predetermined intervals, and the calculation result is transmitted as a frequency signal to a compressor driving device (not shown). To control the frequency of the compressor 103.

Next, as shown in Table 2 (a), the indoor unit 101
A description will be given of a case where the indoor unit 101c starts the rapid operation as shown in Table 2 (b) while the a and 101b are operating at a low load.

[0018]

[Table 2]

The load constants of the indoor units 101a, 101b, and 101c are 0.8, 1.0, and 3.8, respectively. Therefore, the frequency Hz of the compressor 103 is similarly given by: Hz = A × (0.8 + 1.0 + 3. 8) = A × 5.6, and the calculation result of the frequency has not reached the allowable operation value of the compressor 4 and has a margin of about 25%. The calculation result is used as a frequency signal as a compressor driving device. (Not shown) to control the frequency of the compressor 103. Thereafter, calculation is performed based on the rated capacity signal, the differential temperature signal, and the operation mode signal of each of the indoor units 101a, 101b, and 101c at predetermined intervals, and the calculation result is transmitted as a frequency signal to a compressor driving device (not shown). To control the frequency of the compressor 103. The above description has been made mainly for cooling, but control for heating is also possible.

As described above, the capacity corresponding to the load is supplied to the indoor unit not set to the rapid operation, and only the indoor unit set to the rapid operation has the capacity exceeding the rated capacity of the indoor unit. Since the compressor frequency and the indoor air volume are controlled so as to supply a sufficient outdoor capacity to the target, the time until the set temperature is reached can be shortened, and comfort can be improved and energy can be saved. .

[0021]

However, in the above-described conventional configuration, a large-capacity operation can be performed when the outdoor unit has a margin.
When the load of 01b is Ln = 7, Hz = A × (2.
0 + 2.5 + 3.8) = A × 8.3 and the compressor 10
The frequency is Hz = A × 7.
As the allowable operation value of the compressor 103, which is 7, is sent to the compressor driving device to control the frequency of the compressor 103.
The capacity of the room C that has been switched to the rapid operation is also limited.

[0022]

[Table 3]

On the other hand, in order to avoid the above-mentioned ability limitation,
There has been proposed a method of changing the set temperature of an indoor unit for which rapid operation is not set and performing control so as to easily perform thermo-off (Japanese Patent Application Laid-Open No. 09-145130). The information display (displaying the set temperature and the current indoor / outdoor temperature), which is one of the features of the function of the air conditioner, is different from the set temperature. In order to avoid this, it is necessary to have a portion for storing the changed set temperature separately from the device for storing the set temperature, which has disadvantages in that the control becomes complicated and the cost increases.

[0024]

In order to solve the above-mentioned problems, the present invention relates to an outdoor unit having a variable capacity compressor, an outdoor heat exchanger, a blower, a refrigerant liquid side main pipe, and a refrigerant gas side main pipe. , A plurality of indoor units having a heat exchanger and a blower,
A liquid side branch pipe branched from a refrigerant liquid side main pipe through which the refrigerant liquid flows,
A refrigerant is connected to the refrigerant gas-side main pipe through a gas-side branch pipe branched from the refrigerant gas-side main pipe, and an electric expansion valve is provided between the refrigerant liquid-side main pipe and the indoor unit so that the valve opening can be controlled. An indoor temperature setting storage device that configures a cycle and stores a set value of an indoor temperature in each of the indoor units, an indoor temperature detection device that detects an indoor temperature, and an indoor temperature setting storage device and an indoor temperature detection device. A temperature difference calculating device that calculates a temperature difference between the temperature and the indoor temperature, a temperature zone storage device that stores a temperature range in which the temperature difference can be obtained by dividing the temperature range into a plurality of temperature zones, and determines whether the indoor unit is operating or stopped. An operation stop storage device for storing is provided, a temperature zone storage device, and a control device for controlling a blower, a variable capacity compressor, and an electric expansion valve of the indoor unit according to a signal of the operation stop storage device, Cooling operation and dehumidification for indoor units A rapid operation setting device that performs a rapid operation for lowering the room temperature or increasing the room temperature in a short time at the start of the rolling or heating operation, a rapid operation setting storage device that stores the setting of the rapid operation, and a rapid operation setting storage device. With the signal, the capacity of the compressor is increased, the shunt of the refrigerant to the indoor unit without the rapid operation setting is reduced, the airflow of the blower of the indoor unit with the rapid operation set in the rapid operation storage device is increased, and A control device for controlling the blower, the variable displacement compressor and the expansion valve of each indoor unit is provided so as to increase the branch flow of the refrigerant.

According to the invention described above, it is possible to temporarily concentrate the power of the compressor in a room where the temperature is desired to be reduced in a short time during cooling (or desired to be increased during heating).

[0026]

DETAILED DESCRIPTION OF THE INVENTION The invention according to a first aspect of the present invention is directed to an outdoor unit having a variable capacity compressor, an outdoor heat exchanger, a blower, a refrigerant liquid-side main pipe, and a refrigerant gas-side main pipe; A plurality of indoor units having a blower are connected via a liquid side branch pipe branched from a refrigerant liquid side main pipe through which a refrigerant liquid flows, and a gas side branch pipe branched from a refrigerant gas side main pipe through which a refrigerant gas flows. An indoor temperature setting storage device that configures a refrigeration cycle by interposing an electric expansion valve capable of controlling the valve opening between the side main pipe and the indoor unit, and stores a set value of the indoor temperature in each of the indoor units; An indoor temperature detecting device for detecting the indoor temperature, a differential temperature calculating device for calculating a differential temperature between the indoor temperature and the indoor temperature from the indoor temperature setting storage device and the indoor temperature detecting device, and a plurality of temperature ranges in which the differential temperature can be taken. Temperature zone storage that divides and stores temperature zones Device, an operation stop storage device for storing whether the indoor unit is operating or stopped, a temperature zone storage device, and a blower of the indoor unit, a variable displacement compressor, and an electric expansion valve, according to a signal of the operation stop storage device. A rapid operation setting device which has a control device for controlling, and in each of the indoor units, a cooling operation, a dehumidifying operation or a rapid operation for decreasing the room temperature in a short time at the start of the heating operation, or a rapid operation for increasing the room temperature; A rapid operation setting storage device for storing settings, and a control device for controlling the blower, the variable capacity compressor and the expansion valve of each indoor unit by a signal of the rapid operation setting storage device are provided. A differential temperature correction value setting device for setting the differential temperature correction value is provided.

According to this configuration, it is possible to temporarily concentrate the power of the compressor in a room where the temperature is to be lowered in a short time (when the temperature is to be raised during heating).

According to a second aspect of the present invention, there is provided an outdoor unit having a variable capacity compressor, an outdoor heat exchanger, a blower, a refrigerant liquid side main pipe, and a refrigerant gas side main pipe, and a plurality of units having a heat exchanger and a blower. The indoor units are connected via a liquid side branch pipe branched from the refrigerant liquid side main pipe through which the refrigerant liquid flows, and a gas side branch pipe branched from the refrigerant gas side main pipe through which the refrigerant gas flows. An indoor temperature setting storage device that stores a set value of the indoor temperature in each of the indoor units, and detects an indoor temperature, with a refrigeration cycle configured with an electric expansion valve capable of controlling the valve opening between the units. An indoor temperature detecting device, a differential temperature calculating device that calculates a differential temperature between the indoor temperature and the indoor temperature from the indoor temperature setting storage device and the indoor temperature detecting device, and a temperature range in which the differential temperature can be taken is set to a plurality of temperature zones. A temperature zone storage device, which is divided and stored An operation stop storage device that stores whether the inner unit is operating or stopped is provided, and control is performed to control the blower, the variable capacity compressor, and the electric expansion valve of the indoor unit by a signal of the temperature zone storage device and the operation stop storage device. A quick-operation setting device that has a device and that quickly lowers the room temperature at the start of the cooling operation, dehumidification operation, or heating operation at the start of the cooling operation, dehumidification operation or heating operation, and stores the setting of the rapid operation to increase the room temperature. A rapid operation setting storage device, and a temperature zone storage device and a temperature zone threshold value storage device for storing a temperature zone threshold value in each indoor unit. And a signal from the temperature zone storage device, and a difference temperature correction value setting device for setting a correction value of a difference temperature of the indoor unit during operation and in which the rapid operation is not set in the rapid operation setting storage device.

According to this configuration, it is possible to temporarily concentrate the power of the compressor in a room where the temperature is desired to be further reduced in a short time (when it is desired to increase the temperature during heating). Further, since the performance of the air conditioner only in the room where the load is small (the difference between the set temperature and the suction detection temperature is small) is suppressed, the influence of the comfort of the other room is reduced.

According to a third aspect of the present invention, there is provided an outdoor unit having a variable capacity compressor, an outdoor heat exchanger, a blower, a refrigerant liquid side main pipe and a refrigerant gas side main pipe, and a plurality of units having a heat exchanger and a blower. The indoor units are connected via a liquid side branch pipe branched from the refrigerant liquid side main pipe through which the refrigerant liquid flows, and a gas side branch pipe branched from the refrigerant gas side main pipe through which the refrigerant gas flows. An indoor temperature setting storage device that stores a set value of the indoor temperature in each of the indoor units, and detects an indoor temperature, with a refrigeration cycle configured with an electric expansion valve capable of controlling the valve opening between the units. An indoor temperature detecting device, a differential temperature calculating device that calculates a differential temperature between the indoor temperature and the indoor temperature from the indoor temperature setting storage device and the indoor temperature detecting device, and a temperature range in which the differential temperature can be taken is set to a plurality of temperature zones. A temperature zone storage device, which is divided and stored An operation stop storage device that stores whether the inner unit is operating or stopped is provided, and control is performed to control the blower, the variable capacity compressor, and the electric expansion valve of the indoor unit by a signal of the temperature zone storage device and the operation stop storage device. A quick-operation setting device that has a device and that quickly lowers the room temperature at the start of the cooling operation, dehumidification operation, or heating operation at the start of the cooling operation, dehumidification operation or heating operation, and stores the setting of the rapid operation to increase the room temperature. A rapid operation setting storage device, and a temperature zone storage device and a temperature zone threshold value storage device for storing a temperature zone threshold value in each indoor unit. A differential temperature correction value setting device for setting a correction value for a differential temperature of an indoor unit that is in operation and has no rapid operation setting in the rapid operation setting storage device according to a signal of the temperature zone storage device; A time counting device for counting the time since the setting of the rapid operation and a counting time threshold value storing device for storing a threshold value of the counting time, and the signals of the time counting device and the counting time threshold value storing device are provided. Thus, there is provided a control device for restoring the correction value of the differential temperature set in the differential temperature correction device.

According to this configuration, it is possible to temporarily concentrate the power of the compressor in a room where the temperature is to be decreased in a short time (when the temperature is to be increased during heating). In addition, only in a room where the load is small (the difference between the set temperature and the suction detection temperature is small), since the performance of the air conditioner is suppressed only for a certain period of time, the influence of the comfort of other rooms is reduced.

According to a fourth aspect of the present invention, there is provided an outdoor unit having a variable capacity compressor, an outdoor heat exchanger, a blower, a refrigerant liquid side main pipe and a refrigerant gas side main pipe, and a plurality of units having a heat exchanger and a blower. The indoor units are connected via a liquid side branch pipe branched from the refrigerant liquid side main pipe through which the refrigerant liquid flows, and a gas side branch pipe branched from the refrigerant gas side main pipe through which the refrigerant gas flows. An indoor temperature setting storage device that stores a set value of the indoor temperature in each of the indoor units, and detects an indoor temperature, with a refrigeration cycle configured with an electric expansion valve capable of controlling the valve opening between the units. An indoor temperature detecting device, a differential temperature calculating device that calculates a differential temperature between the indoor temperature and the indoor temperature from the indoor temperature setting storage device and the indoor temperature detecting device, and a temperature range in which the differential temperature can be taken is set to a plurality of temperature zones. A temperature zone storage device, which is divided and stored An operation stop storage device that stores whether the inner unit is operating or stopped is provided, and control is performed to control the blower, the variable capacity compressor, and the electric expansion valve of the indoor unit by a signal of the temperature zone storage device and the operation stop storage device. A quick-operation setting device that has a device and that quickly lowers the room temperature at the start of the cooling operation, dehumidification operation, or heating operation at the start of the cooling operation, dehumidification operation or heating operation, and stores the setting of the rapid operation to increase the room temperature. A rapid operation setting storage device, and a temperature zone storage device and a temperature zone threshold value storage device for storing a temperature zone threshold value in each indoor unit. And a control device that closes an expansion valve that diverts the refrigerant by stopping the indoor unit that is in operation and has no rapid operation setting in the rapid operation setting storage device in response to a signal from the temperature zone storage device.

According to this configuration, it is possible to temporarily concentrate the power of the compressor in a room where the temperature is desired to be further reduced in a short time (when the temperature is to be increased during heating). Further, since the performance of the air conditioner only in the room where the load is small (the difference between the set temperature and the suction detection temperature is small) is suppressed, the influence of the comfort of the other room is reduced.

According to a fifth aspect of the present invention, there is provided an outdoor unit having a variable capacity compressor, an outdoor heat exchanger, a blower, a refrigerant liquid side main pipe, and a refrigerant gas side main pipe, and a plurality of units having a heat exchanger and a blower. The indoor units are connected via a liquid side branch pipe branched from the refrigerant liquid side main pipe through which the refrigerant liquid flows, and a gas side branch pipe branched from the refrigerant gas side main pipe through which the refrigerant gas flows. An indoor temperature setting storage device that stores a set value of the indoor temperature in each of the indoor units, and detects an indoor temperature, with a refrigeration cycle configured with an electric expansion valve capable of controlling the valve opening between the units. An indoor temperature detecting device, a differential temperature calculating device that calculates a differential temperature between the indoor temperature and the indoor temperature from the indoor temperature setting storage device and the indoor temperature detecting device, and a temperature range in which the differential temperature can be taken is set to a plurality of temperature zones. A temperature zone storage device, which is divided and stored An operation stop storage device that stores whether the inner unit is operating or stopped is provided, and control is performed to control the blower, the variable capacity compressor, and the electric expansion valve of the indoor unit by a signal of the temperature zone storage device and the operation stop storage device. A quick-operation setting device that has a device and that quickly lowers the room temperature at the start of the cooling operation, dehumidification operation, or heating operation at the start of the cooling operation, dehumidification operation or heating operation, and stores the setting of the rapid operation to increase the room temperature. A rapid operation setting storage device, and a temperature zone storage device and a temperature zone threshold value storage device for storing a temperature zone threshold value in each indoor unit. And a signal from the temperature zone storage device, a control device that shuts down the indoor unit that is in operation and has no rapid operation setting in the rapid operation setting storage device and closes the expansion valve that divides the refrigerant is provided. A time counting device for counting the time since the setting of the rapid operation in the storage device and a counting time threshold value storing device for storing a threshold value of the counting time, and a time counting device and a counting time threshold value storing device. In response to the signal, the stopped indoor unit is restarted, and a control device for opening the expansion valve for diverting the refrigerant is provided.

According to this configuration, it is possible to temporarily concentrate the power of the compressor in a room where the temperature is to be lowered in a short time (when the temperature is to be raised during heating). In addition, only in a room where the load is small (the difference between the set temperature and the suction detection temperature is small), the performance of the air conditioner is suppressed only for a certain period of time.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an example of a refrigeration cycle diagram of a multi-room air conditioner according to the present invention, in which one outdoor unit 2 has a plurality of (for example, three) indoor units 1.
a, 1b, and 1c are connected. FIG.
It is another example of the refrigeration cycle diagram of the multi-room air conditioner according to the present invention, in which a branch unit 16 is connected to one outdoor unit 2 and a plurality (for example, three) of indoor units 1a, 1b, and 1c.
Is connected. The refrigeration cycle of FIG. 2 is also in the range of the present configuration, and the effect is the same.

In FIG. 1, the outdoor unit 2 has an inverter-driven variable capacity (frequency) compressor 3 (hereinafter simply referred to as a compressor), an outdoor heat exchanger 4, a refrigerant liquid side main pipe 5, a refrigerant gas A side main pipe 6 and a four-way valve 7 for switching between cooling and heating are provided. On the other hand, the indoor units 1a, 1b, 1c are provided with indoor heat exchangers 8a, 8b, 8c and indoor blowers 9a, 9b, 9c, respectively, and the outdoor unit 2 and the indoor units 1a, 1b, 1c are provided.
c is a liquid side branch pipe 5a, 5 branched from the refrigerant liquid side main pipe 5.
b, 5c and the gas side branch pipes 6a, 6b, 6c branched from the refrigerant gas side main pipe 6, and the liquid side branch pipe 5
a, 5b, and 5c are provided with an electric refrigerant distribution expansion valve 10 capable of pulse-controlling the valve opening by a stepping motor or the like.
a, 10b and 10c are interposed respectively.

The indoor units 1a, 1b, 1c have room temperature sensors 11a, 11b, 11 for detecting the room temperature in the room.
c, an operation setting device 12 that can set an operation mode (cooling or heating) desired by the resident, a room temperature, and operation or stop.
a, 12b, 12c, and a rapid operation setting device 13a, 13b, 13c capable of setting rapid operation.

In FIG. 2, the liquid side branch pipes 5 a, 5 b, branched from the refrigerant liquid main pipe 5 into the branch unit 16.
5c and a gas side branch pipe 6 branched from the refrigerant gas side main pipe 6
a, 6b, 6c, and the liquid side branch pipes 5a, 5b,
5c, electric refrigerant distribution expansion valves 10a, 10b, which can pulse-control the valve opening degree by a stepping motor or the like, for example.
10c are interposed respectively.

In the refrigeration cycle having the above configuration, during the cooling or dehumidifying operation, the refrigerant discharged from the compressor 3 flows through the outdoor heat exchanger 4 through the four-way valve 7, and is driven by the outdoor blower 15. Exchanges heat with the outdoor air to condense and liquefy, passes through the refrigerant liquid-side main pipe 5, and flows into the liquid-side branch pipes 5a, 5b
The refrigerant is distributed at 5c, and the refrigerant distribution expansion valves 10a, 10b,
After the refrigerant distributed to the plurality of indoor units is controlled at 10c to evaporate at the indoor units 1a, 1b, and 1c, the refrigerant is joined from the gas side branch to the refrigerant gas side main pipe 6, and the four-way valve 7 and the accumulator 16 are operated. Is sucked into the compressor 3 again. Since the refrigerant distribution expansion valves 10a, 10b, and 10c are pulse-controlled by a stepping motor or the like so as to have an opening corresponding to the indoor load, the refrigerant is also controlled at a flow rate corresponding to the indoor load.

FIG. 3 is a cross-sectional view of the indoor unit of the multi-room air conditioner according to the present invention. The indoor unit 1a has a plurality of suction ports 17 formed in the upper part and the front part of the main unit, and in the lower part of the main unit. Has an outlet 18 formed therein. In addition, the suction port 17
An indoor heat exchanger 11a and an indoor blower 9a are provided in an air passage 19 that communicates with the air outlet 18.
A wind direction changing blade 20 is swingably attached to 8. The room temperature sensor 11a is disposed in the main body.

FIG. 4 is a block diagram showing a signal flow of the multi-room air conditioner according to the present invention. First, in the indoor unit 1a, the output of the indoor temperature sensor 11a is sent from the indoor temperature detecting device 21 to the differential temperature calculating device 22 as a temperature signal, while the signal from the operation setting device 12a is received by the signal receiving device 23 to set the operation. The temperature setting set by the device 12a is stored in the room temperature setting storage device 24, and the temperature setting is sent to the differential temperature calculating device 22, where the differential temperature ΔT (= T
r−Ts) is calculated and used as a differential temperature signal. The room temperature is Tr and the set temperature is Ts.

The operation setting device 12a can set an operation stop signal, an operation mode such as cooling, dehumidification, and heating, an air volume setting, an automatic air volume, an air direction setting, and an automatic air direction in addition to the temperature setting.

The operation stop storage device 25 receives the signal set by the operation setting device 12a by the signal receiving device 23 and stores the operation (ON) or stop (OFF) of the indoor unit 1a. The operation mode storage device 26 receives the signal set by the operation setting device 12a by the signal receiving device 23, and stores one of the operation modes such as cooling, dehumidification, and heating of the indoor unit 1a.

Further, the signal set by the operation setting device 12a is stored in the airflow mode storage device 27 by the signal receiving device 23.
And the set value of the air volume of the indoor unit 1a (automatic or H
One of 5 speeds i, Me +, Me, Me-, Lo
) Is stored in the blower voltage setting device 28 and the indoor blower 9
The applied voltage is set to a.

In the rapid operation setting device 13a, the cooling operation,
At the start of the dehumidifying operation or the heating operation, the room temperature can be lowered in a short time, or the rapid operation for raising the room temperature can be set. The signal from the rapid operation setting device 13a is sent to the signal receiving device 23 and stored in the rapid operation setting storage device 29.

Further, the time counting device 30 counts the elapsed time after the signal set by the operation setting device 12a is received by the signal receiving device 23.

Further, the indoor unit 1 is stored in the rated capacity storage device 31.
a is stored, and these rated capacity signals,
A signal difference signal, an operation mode signal, an operation stop signal, an indoor temperature signal, a rapid operation signal, and a counting time signal are transmitted from the signal transmission device 32 to the signal reception device 33 of the outdoor unit 2.

The signal received by the signal receiving device 33 is transmitted to the compressor frequency calculating device 34 and the refrigerant distribution expansion valve opening calculating device 3
5 is sent. The calculation result obtained by the compressor frequency calculation device 34 is sent to a compressor drive device (not shown) as a frequency signal, and the frequency of the compressor 3 is controlled.
Further, the refrigerant distribution expansion valve opening calculating device 35 calculates the refrigerant distribution ratio to calculate the refrigerant distribution expansion valves 10a, 10b, 10
Set the opening of c.

Thereafter, at every predetermined cycle, the frequency No. of the compressor 3 is determined based on the rated capacity signal, the differential temperature signal, the operation mode signal and the operation stop signal. And electric expansion valves 10a, 10b, 10
The valve opening of c is calculated, and the frequency control of the compressor 3 and the opening control of the electric expansion valve are performed.

Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a temperature zone division diagram of a temperature difference ΔT between the room temperature Tr and the set temperature Ts. 6 is a load constant table diagram. FIG. 7 is a flowchart.

First, in the indoor unit 1a, the temperature difference ΔT (= Tr−T) between the indoor suction temperature (Tr) and the set temperature (Ts).
s) is calculated (flowchart S1), converted into a load number Ln value shown in FIG. 6 and used as a differential temperature signal. When the rapid operation setting device 13a is set (S2), in the case of cooling operation, (S3) A temperature correction value Tha (here, supposed to be 2 ° C.) is added to the temperature difference ΔT (S5), converted into a corresponding load number Ln value (S11), and used as a temperature difference signal. In the case of the heating operation, (S3) subtracts the temperature difference ΔT from the temperature correction value Tha (here, supposed to be 2 ° C.) (S8), converts it to the corresponding load number Ln value (S13), and subtracts this value. Temperature signal.

However, although not described in the flowchart here, when the rapid operation setting device 13a is set, the load number Ln = Lmax (here, for example, Ln
= 8), but the maximum load number when not set is limited to Ln = Lmax-1 (here, for example, 7).

For example, during cooling operation, Tr = 27.3 ° C., Ts
= 26 ° C, Ln = 6 at the temperature difference ΔT = 1.3 ° C, but when rapid operation is set in the rapid operation setting device 13a, ΔT = 1.3 ° C + 2 ° C = 3.3 ° C. Ln = 8. However, during cooling operation, Tr = 30 ° C., Ts = 26 ° C.
Then, there is a temperature difference ΔT = 4 ° C. and Ln = 8,
If the rapid operation is not set in the rapid operation setting device 13a, it is determined that the load is not in the region of Ln = 8 but in the region of Ln = 7. The transition to the region of Ln = 8 is made only when the rapid operation is set, and the upper limit of the load table when the rapid operation is not set is Ln = 7.

Next, the rapid operation is set in the rapid operation setting device 13a (S4, S7), and the load number Ln shown in FIG. 5 is changed to Ln = Lmax (here, for example, Ln = Lmax).
8) (S15, S16), the air volume is automatically changed to a set value several taps (here, for example, two taps) higher than the air volume set by the user with the remote controller or the like (S15).
17, S18).

For example, if the user has set the air volume in Me, the air volume is changed to Hi. Although not described in the flow chart, if the user has set an air volume equal to or greater than Me +, the air conditioning load maximum air volume setting PH that exceeds the Hi setting that cannot be set by an external operation by the user.
The air volume setting is changed so as to become i.

On the other hand, in the indoor units 1b and 1c for which the rapid operation setting devices 13b and 13c are not set, in the case of the cooling operation, the correction value Thb (in this case, 2 ° C.) is subtracted from the difference temperature ΔT (S6). Is converted into a load number Ln value (S12), which is used as a differential temperature signal. In the case of the heating operation, a correction value Thb (here, tentatively 2 ° C.) is added to the temperature difference ΔT (S9), converted into a corresponding load number Ln value (S14), and this is used as a temperature difference signal.

Although not shown in the flowchart, the rated capacity signal, the differential temperature signal, the operation mode signal, and the operation stop signal of each of the indoor units 1a, 1b, and 1c are shown in FIG.
The load constant is read from the load constant table shown in FIG. 3, and the sum of the load constants is multiplied by a constant to determine the frequency of the compressor 3 and the opening of the expansion valve 10.

As an example, during the two-room operation (1b, 1c) as shown in Table 4 (a), another room (1) is operated as shown in Table 4 (b).
The case where a) is started by rapid operation will be described.

[0060]

[Table 4]

All the air volumes are set to Me +.

For example, in the cooling operation, the room a is stopped, and the room b Tr =
25.3 ° C, Ts = 26 ° C, Tr room c = 27.3 ° C, Ts
= 26 ° C., Ln = ΔTb = −0.8 ° C.
2. Ln = 6 when the temperature difference ΔTc = 1.3 ° C., and the indoor unit 1
The load constants of a, 1b, 1c are 0, 0.4, 2,.
4, the frequency Hz of the compressor 3 is given by: Hz = A × (0 + 0.4 + 2.4) = A × 2.8 where A is a constant.

The calculation result is sent as a frequency signal to a compressor driving device (not shown) to control the frequency of the compressor 3 and the opening of the expansion valve 10.

At this time, the temperature in the chamber a is Tr = 27.3 ° C. and Ts = 2
When the apparatus is started by rapid operation under the condition of 6 ° C., (differential temperature ΔTa = 1.3 ° C. and Ln = 6), the rapid operation setting device 13a is set, and 2 ° C. is added to the differential temperature ΔT, and the load number corresponding thereto is set. The value is converted into an Ln value and is used as a differential temperature signal. Therefore, Δ
Ta = 1.3 ° C. + 2 ° C. = 3.3 ° C., and Ln = 8.

On the other hand, when the rapid operation setting device 13a is set, the indoor units 1b and 1c, for which the rapid operation setting devices 13b and 13c are not set, subtract the temperature difference ΔT by 2 ° C. and the corresponding load number Ln value Is converted to a differential temperature signal, ΔTb = −0.7 ° C.−2 ° C. = − 1.7 ° C., and Ln = 0 ΔTc = + 1.3 ° C.−2 ° C. = − 0.3 ° C., and Ln = 2 Becomes

Accordingly, the load constants of the indoor units 1a, 1b, and 1c are 2.4, 0, and 0.5, respectively. Therefore, when the frequency Hz of the compressor 3 is A, Hz = A × (2.
4 + 0 + 0.5) = A × 2.9.

The calculation result is sent as a frequency signal to a compressor driving device (not shown) to control the frequency of the compressor 3 and the opening of the expansion valve 10.

Next, a second embodiment will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 5 is a temperature zone division diagram of a temperature difference ΔT between the room temperature Tr and the set temperature Ts. 6 is a load constant table diagram. FIG. 8 is a flowchart.

When the rapid operation setting device 13a is set (S2), in the case of the cooling operation, the temperature correction value T is added to the temperature difference ΔT.
ha (here, supposed to be 2 ° C.) plus (S5), which is converted into a corresponding load number Ln value, which is used as a differential temperature signal (S15). In the heating operation, the temperature difference ΔT is subtracted from the temperature correction value Tha (here, supposed to be 2 ° C.) (S10), converted into a load number Ln value corresponding to the temperature difference ΔT, and used as a temperature difference signal (S17). ).

However, although not described in the flowchart here, when the rapid operation setting device 13a is set, the load number Ln = Lmax (here, for example, Ln
= 8), but the highest load number not set is Ln = Lmax-1 (here, for example, Ln =
7).

Next, rapid operation is set in the rapid operation setting device 13a, and the load number Ln shown in FIG.
When it is in the region of n = Lmax (here, for example, Ln = 8) (S19, S20), the air volume is automatically increased to a set value several taps (here, for example, two taps) above the air volume set by the user with a remote controller or the like. It is changed (S21, S22).

On the other hand, the indoor units 1b and 1c, for which the rapid operation setting devices 13b and 13c are not set, have the current load Ln
Is determined to be La or less (here, for example, La = 2). If Ln ≦ La (here, for example, La = 2 or less) (S7, S12), and in the case of the cooling operation, the temperature difference ΔT is added to the temperature correction value. Thb (here, for example, 1 ° C.) minus (S
8) The load number Ln is converted into a corresponding value of the load number Ln, which is used as a differential temperature signal (S16).

In the case of the heating operation, the temperature difference T
hb (here, for example, 1 ° C.) is added (S13), converted to a corresponding load number Ln value, and used as a differential temperature signal. (S18). When Ln = La + 1 (here, for example, Ln = 3) or more, the correction of the temperature difference ΔT is not performed.

Although not described in the flowchart, the load constants are read from the load constant table shown in FIG. 6 based on the calculation results, and the sum of the load constants is multiplied by a constant to obtain the compressor 3.
And the opening of the expansion valve 10 are determined.

As an example, during two-room operation (1b, 1c) as shown in Table 5 (a), another room (1) is operated as shown in Table 5 (b).
The case where a) is started by rapid operation will be described.

[0076]

[Table 5]

All air volumes are set to Me +.

For example, in the cooling operation, the room a is stopped and the room b Tr =
25.3 ° C, Ts = 26 ° C, Tr room c = 27.3 ° C, Ts
= 26 ° C., Ln = ΔTb = −0.8 ° C.
2. Ln = 6 when the temperature difference ΔTc = 1.3 ° C., and the indoor unit 1
The load constants of a, 1b, 1c are 0, 0.4, 2,.
4, the frequency Hz of the compressor 3 is given by: Hz = A × (0 + 0.4 + 2.4) = A × 2.8 where A is a constant.

The calculation result is sent to a compressor driving device (not shown) as a frequency signal to control the frequency of the compressor 3. At this time, the temperature in the chamber a is Tr = 27.3 ° C. and Ts = 26.
When the apparatus is started by rapid operation under the condition of ° C, (differential temperature ΔTa = 1.3 ° C and Ln = 6), the rapid operation setting device 13a is set, and 2 ° C is added to the differential temperature ΔT, and the corresponding load number Ln This is converted into a value and this is used as a differential temperature signal. Therefore, ΔT
a = 1.3 ° C. + 2 ° C. = 3.3 ° C., and Ln = 8.

On the other hand, when the rapid operation setting device 13a is set, the indoor units 1b and 1c in which the rapid operation setting devices 13b and 13c are not set judge whether the current load is Ln = 2 or less, and Ln = 2 In the following cases, the temperature difference ΔT is subtracted by 2 ° C., converted into a corresponding load number Ln value, and used as a temperature difference signal. Difference temperature ΔT when Ln = 3 or more
Is not corrected. Accordingly, ΔTb = −0.8 ° C.−2 ° C. = − 2.8 ° C., and Ln = 0 ΔTb = 1.3 ° C.-0 ° C. = 1.3 ° C., and Ln = 6.

Therefore, the load constants of the indoor units 1a, 1b, and 1c are 2.4, 0, and 2.4, respectively, and the frequency Hz of the compressor 3 is given by: Hz = A × (2.4+
0 + 2.4) = A × 4.8.

The calculation result is sent as a frequency signal to a compressor driving device (not shown) to control the frequency of the compressor 3 and the expansion valve 10.

Next, a third embodiment will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 5 is a temperature zone division diagram of a temperature difference ΔT between the room temperature Tr and the set temperature Ts. 6 is a load constant table diagram. FIG. 9 is a flowchart.

When the rapid operation is set in the rapid operation setting device 13a, the time counting device 30 counts the elapsed time t after the rapid operation is set (S3).

Thereafter, the same control as in claim 1 or 2 is performed (S4 to S19), but when the elapsed time t = ta (here, for example, 5 minutes) elapses (S20 to 23), the rapid operation setting device 13b, The temperature difference ΔT of the indoor units 1b and 1c for which the rapid operation is not set to 13c is returned to the temperature difference ΔT (uncorrected temperature) corresponding to the current load, and (S31, S3
3) The compressor, blower, and expansion valve are also set to the set values corresponding to the current load.

On the other hand, in the indoor unit 1a in which the rapid operation has been set in the rapid operation setting device 13a, the elapsed time t = tb (here, for example, one hour) has elapsed since the rapid operation was set, or (S24, S25). ) Or the load area is Ln ≦ Lma
x-1 (here, Ln = 7, for example)
26, S27), the setting of the rapid operation setting device 13a is released, the air volume is returned to the original state (S28, S29), and the differential temperature ΔT is changed to the differential temperature ΔT corresponding to the current load (temperature not corrected). (S30, S32), the compressor, the blower, and the expansion valve are also set to the set values corresponding to the current load.

Next, a fourth embodiment will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 5 is a temperature zone division diagram of a temperature difference ΔT between the room temperature Tr and the set temperature Ts. 6 is a load constant table diagram. FIG. 10 is a flowchart.

When the rapid operation setting device 13a is set,
In the case of the cooling operation, a temperature correction value Tha (here, for example, 2 ° C.) is added to the temperature difference ΔT (S5), converted into a corresponding load number Ln value, and used as a temperature difference signal. (S1
5).

In the case of the heating operation, a temperature correction value T is added to the temperature difference ΔT.
ha (here, for example, 2 ° C.) is subtracted (S10), converted into a corresponding load number Ln value, and used as a differential temperature signal. (S16).

However, when the rapid operation setting device 13a is set, the load number is set to Ln = Lmax (here, for example, Ln = 8), but when the rapid operation setting device 13a is not set, It is assumed that the maximum load number not set is limited to Ln = Lmax-1 (here, for example, Ln = 7).

Further, rapid operation is set in the rapid operation setting device 13a, and the load number Ln shown in FIG.
When it is in the region of n = Lmax (here, for example, Ln = 8) (S17, S18), the air volume is automatically changed to a set value two steps higher than the air volume set by the user with the remote controller (S19, S20). . On the other hand, the rapid operation setting device 13
The indoor units 1b and 1c for which b and 13c are not set determine whether the current load Ln is equal to or less than La (here, for example, La = 2) (S7, S12), and Ln ≦ La or less (here, for example, Ln = 2 or less), the indoor unit 13b,
The operation of the blowers 9b and 9c of 13c is stopped (S8, S
13). If Ln = La + 1 (here, for example, Ln = 3 or more), this operation is not performed.

From this result, although not described in the flowchart, a load constant is read from the load constant table shown in FIG. 6, and the sum of the load constants is multiplied by a constant to determine the frequency of the compressor 3 and the opening degree of the expansion valve 10. To determine.

Next, a fifth embodiment will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 5 is a temperature zone division diagram of a temperature difference ΔT between the room temperature Tr and the set temperature Ts. Figure 6 load constant table. FIG. 11 is a flowchart.

When the rapid operation is set in the rapid operation setting device 13a, the time counting device 30 counts the elapsed time t after the rapid operation is set. (S3) Thereafter, the same control as in claim 4 is performed (S4 to S21), but when the elapsed time t = ta (here, for example, 5 minutes) elapses (S2).
2 to 25), the indoor units 1b and 1c for which the rapid operation is not set in the rapid operation setting devices 13b and 13c restart the operation of the blower (S36, S37), and the compressor, the blower, and the expansion valve also have the current load. Is set to the set value corresponding to. In the indoor unit 1a in which the rapid operation is set in the rapid operation setting device 13a, the elapsed time t = tb (here, for example, 1 hour) has elapsed since the rapid operation was set (S26, S27), or the load Ln is Ln. ≦ Lmax−1 (here, for example, Ln ≦
7) (S28, S29), the setting of the rapid operation setting device 13a is released, the air flow is returned to the original setting (S30, S31), and the temperature difference ΔT is changed to the temperature difference corresponding to the current load. ΔT (the temperature not corrected), and (S32, S3
3) The compressor, blower, and expansion valve are also set to the set values corresponding to the current load.

Also in the configuration shown in FIG. 2, the control of the refrigerant distribution expansion valves 10a, 10b and 10c of the outdoor unit of FIG.
Since the control operations are the same as those performed by 0b and 10c, the description is omitted.

[0096]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the capacity of the indoor unit in which the rapid operation switch is not pressed (the rapid change of air conditioning is not required) is reduced, and the rapid operation switch is pressed (rapidly operated). Compressor power is concentrated to increase the capacity of indoor units,
By changing the air volume, it becomes possible to easily and abruptly change the air conditioning in a room with a high load (a large difference between the set temperature and the indoor atmosphere temperature).

Further, according to the second and fourth aspects of the present invention, the capacity of the indoor unit in which the rapid operation switch is not pressed (the rapid change of air conditioning is not required) is reduced (or stopped), In order to increase the capacity of the indoor unit where the rapid operation switch is pressed (a rapid change in air conditioning is required),
By concentrating the power of the compressor and changing the air volume, the air conditioning in a room with a high load (the temperature difference between the set temperature and the room ambient temperature is large) can be changed abruptly and without difficulty. In addition, although the rapid operation switch is not pressed (a rapid change in air conditioning is not required), the performance of the indoor unit in a room where the load is high (the temperature difference between the set temperature and the indoor atmosphere temperature is large) is not reduced. Therefore, the influence on comfort is reduced.

Further, according to the third and fifth aspects of the present invention, the capability of the indoor unit in which the rapid operation switch is not pressed (the rapid change of air conditioning is not required) is temporarily reduced (or stopped). The load is high by concentrating the power of the compressor and changing the air volume so as to increase the capacity of the indoor unit whose rapid operation switch is pressed (requiring a rapid change in air conditioning). (The temperature difference between the set temperature and the indoor atmosphere temperature is large.) The air conditioning in the room can be changed abruptly and without difficulty. In addition, since the capacity of the indoor unit in the room where the rapid operation switch is not pressed (a rapid change in air conditioning is not required) is only temporarily reduced, the influence on the comfort is further reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a piping system and sensor arrangement of a refrigeration cycle of a multi-room air conditioner according to an embodiment of the present invention.

FIG. 2 is a piping diagram and a sensor arrangement diagram of a refrigeration cycle of the multi-room air conditioner according to the embodiment of the present invention.

FIG. 3 is a schematic longitudinal sectional view of an indoor unit of the multi-room air conditioner of the embodiment according to the present invention.

FIG. 4 is a block diagram showing a control flow according to the embodiment of the present invention.

FIG. 5 is a temperature zone division diagram of the differential temperature ΔT of the embodiment according to the present invention.

FIG. 6 is a diagram showing the relationship between the sum of operating indoor unit load constants and the compressor frequency according to the embodiment of the present invention.

FIG. 7 is a flowchart illustrating control according to the first embodiment of the present invention.

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

FIG. 9 is a flowchart illustrating control according to a third embodiment of the present invention.

FIG. 10 is a flowchart illustrating control according to a fourth embodiment of the present invention.

FIG. 11 is a flowchart illustrating control according to a fifth embodiment of the present invention.

FIG. 12 is a piping diagram and a sensor arrangement diagram of a refrigeration cycle of a conventional multi-room air conditioner.

FIG. 13 is a block diagram showing a control flow of a conventional multi-room air conditioner.

FIG. 14 is a temperature zone division diagram of a differential temperature ΔT of a conventional multi-room air conditioner.

FIG. 15 is a diagram showing the relationship between the sum of the load constants of the indoor units operated by the conventional multi-room air conditioner and the compressor frequency.

[Explanation of symbols]

 1a, 2a, 3a Indoor unit 2 Outdoor unit 3 Variable capacity compressor 4 Outdoor heat exchanger 5 Refrigerant liquid side main pipe 6 Refrigerant gas side main pipe 10 Electric expansion valve 11a, 11b, 11c Indoor temperature detector 13a, 13b, 13c Rapid operation Setting device 15 Blower 22 Difference temperature calculating device 24 Room temperature setting storage device 25 Operation stop storage device 27 Rapid operation storage device 29 Rapid operation storage device 30 Time counter

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L060 AA05 AA06 CC02 CC08 DD02 EE05 EE09 3L092 AA03 DA14 EA15 FA03 FA19 FA27 GA02 GA03 GA09 JA14 KA13 LA06 LA07

Claims (5)

[Claims] 1. A variable displacement compressor, an outdoor heat exchanger, a blower,
A refrigerant liquid side main pipe, one outdoor unit having a refrigerant gas side main pipe, and a plurality of indoor units having a heat exchanger and a blower, a liquid side branch pipe branched from the refrigerant liquid side main pipe through which refrigerant liquid flows, and An electric expansion valve connected via a gas-side branch pipe branched from the refrigerant gas-side main pipe through which the refrigerant gas flows and having a valve opening controllable between the refrigerant liquid-side main pipe and the indoor unit is provided. An indoor temperature setting storage device that configures a refrigeration cycle and stores a set value of an indoor temperature in each of the indoor units,
An indoor temperature detecting device that detects an indoor temperature, a differential temperature calculating device that calculates a differential temperature between a set indoor temperature and an indoor temperature from the indoor temperature setting storage device and the indoor temperature detecting device, and the differential temperature can be obtained. A temperature zone storage device for storing a temperature range by dividing the temperature range into a plurality of temperature zones; and an operation stop storage device for storing whether the indoor unit is operating or stopped, wherein the temperature zone storage device and the operation stop storage are provided. Depending on the device signal,
A control device for controlling the blower, the variable displacement compressor, and the electric expansion valve of the indoor unit, and the cooling operation, the dehumidification operation, or the start of the heating operation for each of the indoor units, the room temperature is reduced in a short time, Alternatively, a rapid operation setting device for performing a rapid operation for raising the room temperature, a rapid operation setting storage device for storing the setting of the rapid operation, and a signal of the rapid operation setting storage device, the blower of each indoor unit and the variable A multi-room air conditioner, comprising: a control device for controlling a displacement compressor and the expansion valve; and a differential temperature correction value setting device for setting a correction value for the differential temperature based on a signal from the rapid operation storage device. 2. Each of the indoor units is provided with the temperature zone storage device and a temperature zone threshold value storage device for storing a temperature zone threshold value, and the rapid operation setting storage device and the temperature zone threshold value storage device. A differential temperature correction value setting device for setting a correction value of the differential temperature of an indoor unit that is in operation and has no rapid operation setting in the rapid operation setting storage device, based on a signal from the device and the temperature zone storage device. Item 2. The multi-room air conditioner according to Item 1. 3. A time counting device for counting the time after the rapid operation is set in the rapid operation setting storage device in each of the indoor units, and a counting time threshold value for storing a threshold value of the counting time. A storage device is provided, and the correction value of the differential temperature set in the differential temperature correction device is returned to an original value by a signal of the time counting device and a counting time threshold value storage device. 3. The multi-room air conditioner according to item 2. 4. Each of the indoor units is provided with the temperature zone storage device and a temperature zone threshold value storage device for storing a temperature zone threshold value, and the rapid operation setting storage device and the temperature zone threshold value storage device. A multi-room air conditioner that stops an indoor unit that is in operation and has no setting for rapid operation in the rapid operation setting storage device, based on a signal from the device and the temperature zone storage device. 5. A time counting device for counting the time since the rapid operation was set in the rapid operation setting storage device in each of the indoor units, and a counting time threshold value for storing a threshold value of the counting time. The multi-room air conditioner according to claim 4, further comprising a storage device, wherein the stopped indoor unit is restarted by a signal from the time counting device and the counting time threshold value storage device.