JPH0755225A - Demand control system for air conditioner - Google Patents

Abstract

PURPOSE:To ensure an actual peak cut countermeasure such as rapidly altering set temperature of an indoor machine by controlling operation frequency of a compressor based upon a demand control signal from a demand device operation power set to an outdoor control device is attained. CONSTITUTION:There are provided an outdoor machine 1 including a compressor 9, a current sensor 8 for detecting an operation current of the compressor 9, an outdoor control device 6 provided in an outdoor machine 1 for controlling the same, and a demand device 4 connected with the outdoor machine 1 for generating a demand control signal being a peak supply power countermeasure power supply cut instruction. There are further provided power estimation means for estimating operation power on the basis of a product of an operation current of the compressor 9 detected through the current sensor 8 and operation voltage of the compressor 9 set by the outdoor control device 6, and compressor operation control means for controlling the operation frequency of the compressor 9 based upon the demand control signal from the demand control device such that preset operation power upon the demand control is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demand control system for an air conditioner.

[0002]

2. Description of the Related Art FIG. 20 shows, for example, Japanese Patent Laid-Open No. 4-13664.
FIG. 21 is a block diagram of a conventional demand control system for an air conditioner shown in Japanese Patent Publication No. 8 and FIG. 21 is a flow chart of this demand control.

In FIG. 20, 101 is a demand control device, 102 is an air conditioning monitoring control system, 103 is a demand operation command, 104 is a compressor, 105 is a current sensor, 10
Reference numeral 6 is an inverter control circuit, and 107 is a microcomputer.

Since the conventional demand control system for the air conditioner is configured as described above, the microcomputer (provided in the demand control device 101 in step 85 of the flow chart in FIG. 21 during operation of the air conditioner ( The CPU 107 checks whether there is a demand command from the demand operation command 103. If there is no demand command, normal operation is performed in step 86. If there is a demand command, the process jumps to step 87, where the demand command is issued. , CPU 104 determines the upper limit value (for example, 30 A) of the operating current of the compressor. Next, the CPU 107 detects the current with the current sensor 105 provided in the inverter control circuit 106, and the current value is measured as the actual compressor 10
4 is converted into an operating current, and it is checked in step 88 whether the current is equal to or higher than the upper limit value. ) Lower. This operation is continued until it becomes less than or equal to the upper limit value. If it is less than or equal to the upper limit value, the process jumps to step 90, where the operation frequency of the compressor 9 is maintained as it is, and the operation is continued. At step 91, it is checked whether the demand command from the demand operation command 103 is changed. If the demand command is "demand release", the demand operation is released in step 93, the process jumps to step 86, and the normal operation is returned here. If the demand command is "change of demand operation level", step 9
Step 4 after changing the demand operation level in 4
Returning to 7, the above operation is repeated again. As for the demand device, there is a demand device as described in JP-A-1-114654.

[0005]

In the demand control system as described above, the upper limit value of the operating current of the compressor is determined based on the demand command, so that there is a problem that the demand amount is insufficient and the followability to the demand command is poor. There was a point. Further, there is a problem that only current limiting control can be performed as a measure for peak cut.

The present invention has been made to solve the above problems, and calculates the operating power of an air conditioner, and performs demand control based on the calculated operating power according to a demand command. Therefore, the purpose is to implement a practical measure for peak cut, such as promptly changing the set temperature of the indoor unit in response to a demand command.

[0007]

A demand control system for an air conditioner according to the present invention includes a current sensor for detecting an operating current of a compressor, an outdoor control device provided in the outdoor unit for controlling the outdoor unit, and an outdoor unit. Set with the demand device that is connected to the compressor and sends out a demand control signal that is a power supply cut command for peak power supply countermeasures, and the compressor operating current detected by the outdoor control device via the current sensor and the outdoor control device. Means for calculating the operating power by the product of the operating voltage of the compressor, and means for controlling the operating frequency of the compressor based on the preset operating power during demand control and the demand control signal from the demand control means. It is a thing.

Further, in the demand control system for an air conditioner of another invention, a demand amount setting switch is provided in the outdoor control device of the outdoor unit so that the operating electric power amount at the time of demand control of the air conditioner can be arbitrarily set. It is a thing.

A demand control system for an air conditioner according to another aspect of the present invention, when the demand control of the air conditioner is canceled,
The operating frequency of the compressor is set according to the operating load at the time of release, and the operating frequency of the compressor is gradually controlled by the preset frequency until the frequency reaches the set frequency.

Further, the demand control device for the air conditioner of another invention transmits the power supply amount for the peak power supply countermeasures, and the outdoor control device receives the demand operating power from the demand device and supplies this operating power. Originally, it controls the operating frequency of the compressor.

Further, the demand control system for an air conditioner of another invention transmits the operating electric power amount set at the time of demand control of the air conditioner to the indoor control device of the indoor unit by transmission between the indoor and outdoor units. At the same time, the indoor control device calculates the set temperature based on the received operating electric energy, and changes the set temperature during the current operation to perform the operation.

[0012]

The demand control system for the air conditioner of the present invention detects the operating current of the compressor through the current sensor, and the air conditioning is performed by the product of the operating current and the compressor operating voltage set by the outdoor controller. By determining the operating power of the compressor, the operating frequency of the compressor is controlled based on the demand control signal from the demand device so that the operating power is set in the outdoor control device.

In the demand control system for an air conditioner of another invention, a desired demand amount is set in the outdoor control device by operating a demand amount setting switch provided in the outdoor control device of the outdoor unit.

Further, in the demand control system for an air conditioner according to another aspect of the invention, when the outdoor control device for the outdoor unit releases the demand control signal from the demand control means, the compressor operates according to the operating load at the time of release. In addition to setting the frequency, the operating frequency of the compressor is gradually increased by the rising frequency set in the outdoor control device.

In the demand control system for an air conditioner according to another aspect of the invention, the outdoor control device receives the demand operating power from the demand device to control the operating frequency of the compressor based on the operating power. It is a thing.

Further, in the demand control system for an air conditioner according to another invention, the set operating electric energy is transmitted to the indoor control device of the indoor unit by transmission between the indoor and outdoor units, and the indoor control device receives the received operation. The set temperature for the amount of electric power is calculated, and the set temperature during the current operation is changed to perform the operation.

[0017]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is an overall configuration diagram of a demand control system for an air conditioner according to the present invention, FIG. 2 is a refrigerant system diagram of the air conditioner,
3 is a block diagram of the outdoor control device and the inverter device of the outdoor unit, FIG. 4 is a block diagram of the outdoor control device of the indoor unit, and FIG. 5 is an example of a flowchart showing the operation of the outdoor control device.
In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a remote controller, 4 is a demand device, 5 is a transmission line, 6 is an outdoor control device, 7 is an inverter device, 8 is a current sensor, 9 is a compressor, 10 Is an indoor control device, 11 is a refrigerant pipe, 12 is an accumulator, 13 is an outdoor heat exchanger, 14 is an outdoor fan, 15 is a four-way valve, 16 is an electromagnetic valve, 17 is an indoor fan, and 18 is an indoor heat exchanger.

The outdoor unit is provided with a compressor 9, an accumulator 12, a four-way valve 15, a heat exchanger 13 and an outdoor fan 14. The outdoor control unit 6 controls the inverter unit 7 and the four-way valve 15 and the outdoor fan. It controls outdoor units such as 14 and transmits operation data to the indoor units (multiplex transmission). The indoor unit is provided with a heat exchanger 18, a solenoid valve 16, and an indoor fan 17, and the indoor control device 10 controls indoor units such as the solenoid valve 16 and the indoor fan 17 and transmits operation data to an outdoor unit / remote controller. I do.

Reference numeral 19 is a diode module for full-wave rectifying the AC voltage, 20 is a smoothing capacitor for smoothing the full-wave rectified voltage, 21 is a transistor module for converting DC to AC, 22 is a drive circuit, and 23 is a demand device. Input circuit for receiving the signal of 24, a microcomputer (CPU) for controlling the outdoor unit, 25 for a memory, 26 for a transmission circuit for communicating with the indoor unit, 27 for an output circuit for driving a fan / four-way valve in the indoor unit, 28 is a transmission circuit that communicates with the outdoor unit / remote controller, 29 is a microcomputer (CPU) that controls the indoor unit, 30 is an output circuit that drives a fan, a four-way valve, and the like in the indoor unit, and 31 is a memory that is a storage unit. is there.

Next, the operation of the present invention will be described.
The transmission circuit 28 in the indoor control device 10 is operated by a start / stop signal from a remote controller connected to each indoor unit 2.
Is received by the CPU 29, and the CPU 29 determines whether or not the operation or stop request is transmitted to the outdoor unit 1 via the transmission circuit 28, and the transmission circuit 23 in the outdoor control device 6 receives the request. Control the machine 1.

C at step 32 of the flow chart of FIG.
The PU 24 performs normal outdoor unit control, and at the same time, determines the operating frequency of the compressor 9 and commands the inverter device 7 to operate the transistor 21 by the drive circuit 22 to start the operation of the compressor 9. CP in step 33
The U 24 detects the current by the current sensor 8 and converts the current value into the actual operating current of the compressor 9. In step 34, the compressor operating current and the CPU 24 convert the inverter 24 into the inverter device 7.
The operating electric power is calculated by the product of the compressor operating voltage commanded to

Next, in step 35, it is checked whether or not there is a demand control command from the demand device, and if there is no demand control command, normal operation control is performed, and if there is a demand control command, step 3
Fly to 6 Here, if the calculated operating power is less than or equal to the preset power (for example, 50% of the rated power) preset in the memory 25, the process jumps to step 37, the operating frequency is left as it is, and the process returns to step 33. If the power is equal to or more than the set power, the CPU 24 causes the inverter 24 to operate the compressor 9
The operating frequency of the compressor is lowered by one rank (for example, 2 Hz), the CPU 24 detects the operating current of the compressor again by the current sensor 8 in step 39, and the operating voltage of the compressor 9 lowered by one rank is compared with the operating voltage in step 40. The operating electric power is calculated by the product, and it is checked in step 41 whether the operating electric power is less than or equal to the set electric power. If it is above, it will return to step 38 and control of the operating frequency of the compressor 9 will be continued.

Example 2. FIG. 6 is a configuration diagram of an outdoor control device according to another embodiment of the invention, FIG. 7 is a flowchart showing the operation of the outdoor control device, and the other configuration is the same as that of the first embodiment. In the first embodiment, the demand amount corresponding to the demand control command from the demand device is set in the memory 25 of the outdoor unit in advance. However, in the second embodiment, the demand amount setting switch 42 provided in the outdoor control device 44 arbitrarily sets the demand amount from the outside. It allows the demand amount to be set.

As in the first embodiment, the outdoor controller 44 sets the outdoor unit control and the operating frequency of the compressor in step 45 in response to the operation / stop signals from the remote controller 3 and the indoor unit 2 connected to each indoor unit. In step 46, the CPU 43 reads the demand amount set by the demand amount setting switch 42, and in step 47, the CPU 43
Detects the current with the current sensor 8, converts the current value into the actual operating current of the compressor 9, and in step 48, calculates the product of the compressor operating current and the compressor operating voltage commanded from the CPU 43 to the inverter device. Calculate the operating power.

Next, at step 49, the demand control device 4
If there is a demand control command, normal operation control is performed. If there is a demand control command, the operation jumps to step 50, and the calculated operating power is the demand setting power for the demand amount setting switch 42 (for example, rating). It is checked whether it is more than 25% or 50% of the electric power), and if it is below, the operation frequency is left as it is in step 51 and the process returns to step 47. If the operating power is equal to or higher than the set power, the CPU 43 causes the inverter 43 to set the operating frequency of the compressor 1 to one rank (for example, 2H) in step 52.
z) lowered, the compressor 9 lowered by one rank in step 54
The operating power is calculated by the product of the operating frequency and the operating voltage, and it is checked in step 55 whether the operating power is less than the set power. If so, the process returns to step 52 and the operating frequency of the compressor 9 is continued.

Example 3. FIG. 8 is a flowchart of an outdoor control device according to another embodiment of the invention, and the other structure is the same as that of the first and second embodiments. Although the operations of the above-described first and second embodiments are repeated during the demand control in step 56, it is checked in step 57 whether the demand control command from the demand control device 4 is released, and if not released, the demand control is continued as it is. If it is released, in step 58, the CPU 24 (43) determines the operating load of the outdoor unit 1 with respect to the number of operating indoor units 2 at the present time, and sets the operating frequency of the compressor 9, but in step 59, the set frequency is The operating frequency of the compressor currently under demand control is set. In step 59, it is checked whether the set frequency is higher than the operating frequency of the compressor under current demand control. If it is smaller, the CPU 24 (43) causes the inverter 24 to operate in step 60. To the set frequency, and the demand control is canceled in step 63. If the set frequency is higher, the operating frequency of the compressor 9 is increased only by the increasing frequency (for example, 2 Hz) preset in the memory 25 in step 61, and it is checked in step 62 whether it is equal to the setting frequency, If not equal, 30 in step 95
The operation is continued for a second, and then the process returns to step 61 to control the operating frequency of the compressor 9 as described above. If the frequency is equal to the set frequency, the demand control is canceled in step 63 to return to the normal operation.

Example 4. 9 is an overall configuration diagram of a system when the central controller 51 for air conditioning is used, FIG. 10 is a configuration diagram of the central controller for air conditioning, FIG. 11 is a flowchart of the central controller, and FIGS. 12 and 13 are flowcharts of the outdoor unit. . 51 is a central controller for air conditioning that controls each outdoor unit, 52 is a microcomputer (CPU) that controls the central controller, 53 is a memory, 54
Is a display device for displaying the operating state of each air conditioner, 55 is a setting input circuit for inputting the operation / stop of each air conditioner, 56 is an input circuit for inputting an ON / OFF signal from the demand device, and 57 is each outdoor It is a transmission circuit that performs transmission with the machine.

The demand device has an ON / OFF control (ON at the time of demand) configuration, and the centralized controller 51 transmits the demand electric power amount to each outdoor unit 1 if the demand starts based on a signal from the demand control device. . The centralized controller 51 includes a CPU 52, a memory 53, a display device 54, a setting input circuit 55, an input circuit 56, and a transmission circuit 57.
It has a function of operating / stopping the indoor units connected to each outdoor unit collectively or individually. As an operation, all the air conditioners connected by the setting input circuit are registered in the centralized controller and stored in the memory. It is judged whether or not there is a demand control command from the demand device, and if there is no demand control command, normal operation is performed, and if there is a demand control command, the demand amount is transmitted to each outdoor unit via the transmission circuit. -Set the demand amount as follows. For example, regardless of the capacity of the outdoor unit, a constant amount of power (for example, 10 KW) is transmitted, and the outdoor unit is operation-controlled to reach that amount of power. In addition, or regardless of the capacity of the outdoor unit, a constant amount of power (for example, 5 KW) is transmitted, and the outdoor unit performs operation control so that the received amount of power is subtracted from the current operating power. Further, regardless of the capacity of the outdoor unit, a certain demand amount (for example, 25%) is transmitted, and the outdoor unit calculates the demand power from the demand amount received from the current operating power and controls the operation. When the demand control command is released, the centralized controller sends a demand release signal to each outdoor unit, and the outdoor unit returns to normal operation when it receives the demand release signal.

The flow of the centralized controller is as shown in FIG. 11. The demand command is judged (S11), if there is demand cancellation it is judged (S12), and if not, the demand amount is transmitted to the outdoor unit (S13). ).

FIG. 12 shows a flow of the outdoor unit in which a constant amount of electric power (for example, 10 KW) is transmitted regardless of the capacity of the outdoor unit and the operation of the outdoor unit is controlled so as to reach the electric power. Further, in FIG. 13, a constant amount of electric power (for example, 5 KW) is transmitted regardless of the capacity of the outdoor unit, and the outdoor unit performs operation control so that the amount of electric power received is the amount of electric power received. The flow of an outdoor unit is shown.

In the outdoor unit controller, the operating conditions of the compressor are set and the compressor is operated (S14). While the compressor is operating, the operating current is detected (S15), this electric power is calculated (S16), and the demand command is issued (S15).
17), if it is determined that there is no demand release (S18),
The command power is calculated (S19, S24), and the current is detected again by the operation (S20) in which the compressor frequency is lowered (S2).
1) The electric power is calculated (S22), and this operation is continued until the electric power is equal to or less than the command electric power (S23). Note that in the command power calculation, FIG. 12 shows the operating power-command power demand amount, and FIG. 13 shows the operating power command demand amount.

As described above, the power control is performed by the demand control device itself for determining the power value, which is adapted to the power value determination. By doing so, the demand power of the air conditioner itself can be known and these powers can be controlled. By adding the amounts, it is possible to calculate the total demand power amount, and fine control is possible. Also, by setting the demand amount for each air conditioner with respect to the demand power amount specified by the air conditioner such as 25% and 50%, the total demand power amount can be calculated by adding the power amount. Can be calculated, easy to calculate,
Practical peak cut measures that anyone can understand become possible.
In addition, this air conditioner performs demand control (capacity saving operation) by the outdoor unit itself, so when there are multiple outdoor units,
The level for demand control can be individually determined by the setting switch. For example, a certain outdoor unit system is set to 25%, a certain system is set to 50%, and a system which does not want to save its capacity is set to 25%. In addition, as demand is released, all outdoor unit systems are released at the same time, so the operation that was in capacity save operation is close to full operation, and demand control operates again,
This is repeated. Therefore, in order to prevent this, the capacity is gradually increased, and the operation can be performed even if the demand control does not operate even a little.

Moreover, when the centralized controller for air conditioning is used, it is possible to manage the whole while looking at the display device, and it becomes particularly easy to manage the power consumption of many air conditioners.

Example 5. FIG. 14 is a flowchart of an outdoor control device according to another embodiment of the present invention, and FIG. 15 is a flowchart of an indoor control device. The overall control of the demand control system, the configuration of the outdoor control device of the outdoor unit and the inverter device, and the indoor unit The configuration of the indoor control device is the same as in the first and second embodiments. Similar to the first and second embodiments, the remote controller 3 and the indoor unit 2 connected to each indoor unit.
The outdoor control device 6 (44) starts the outdoor unit control in response to the operation / stop signal from.

The operation of the outdoor controller 6 (44) will be described with reference to the flow chart of FIG. CPU 24 in step 64
(43) checks whether there is a demand control command from the demand device 4, and if there is no demand control command, performs normal control. If there is a demand control command, jumps to step 65 to set the demand amount, and in step 66, through the transmission circuit 26. Send the demand amount to the indoor unit. Next, at step 67, the CPU 24 (4
In 3), it is checked whether the demand control command is released, and if not, this check is continued. If there is cancellation, the process jumps to step 68, and the demand control cancellation is transmitted to the indoor unit 2 via the transmission circuit 26.

The operation of the indoor control device 10 will be described with reference to the flowchart of FIG. When the CPU 29 receives the demand amount from the outdoor unit 1 via the transmission circuit 28 in step 69, the current set temperature is stored in the memory 31 in step 70, and in step 71 the set temperature corresponding to the demand amount (for example, when 50% is set) (−2 ° C.), the current set temperature is changed, and it is checked in step 72 whether there is a demand control cancellation command from the outdoor unit 1. If not, this check is continued. If there is a release command, the process jumps to step 73 to read the set temperature before the demand control from the memory 31,
In step 74, the set temperature is changed and the normal control is resumed.

As the demand amount from the outdoor unit to the indoor unit, since the capacity of the indoor unit is different, the demand amount is, for example, 50.
If it is%, it is stored in the memory as ± 2 ° C (-2 ° C for the heating indoor unit, + 2 ° C for the cooling indoor unit) and transmitted to each indoor unit. In this way, the same demand amount (for example, −2 ° C.) can be transmitted to each indoor unit.

Example 6. FIG. 16 is an overall configuration diagram of a demand control system for an air conditioner using a demand control device, FIG. 17 is a configuration diagram of a demand control device, and FIG. 18 is a configuration diagram of an outdoor control device. Reference numeral 60 designates an input circuit 56 for inputting a pulse signal corresponding to the electric energy from the watt-hour meter, a CPU 52 for calculating the input signal into electric energy, a display circuit 54 for displaying the electric energy and demand amount, and a demand amount. A setting input circuit 55 for externally setting the like, an output circuit (ON during demand) 61 for outputting a demand control command,
The demand control device includes a transmission circuit 62 that outputs a demand control command by serial communication and the like, and a memory that stores a demand amount and the like.

Reference numeral 70 denotes a receiving circuit 65 for receiving a demand command from the demand control device 60, a microcomputer (CPU) 66 for controlling the outdoor unit, 67 for storing operation data, a fan in the outdoor unit, and a four-way valve. The outdoor control device is composed of an output circuit 68 for driving the above, and a transmission circuit 69 for communicating with the indoor unit. Demand control device 60
Calculates the current amount of electric power used by the signal from the watt-hour meter and sets a predetermined margin (for example, 80% of the contracted electric power).
%), The demand control command is output, but at this time, the demand electric energy of the air conditioner is input from the setting input circuit 55 (for example, 10 KW), and when the demand control condition is satisfied, the demand circuit is transmitted via the transmission circuit 62. The demand electric energy is transmitted to the outdoor unit 1. When the demand control condition is released, the demand release command is transmitted. At this time, the outdoor unit receives the demand control command from the demand control device 60 and receives the demand control command.
When the signal is received via 5, the operation is controlled so that the amount of electric power is obtained. When the demand release command is received, it returns to normal operation.

Example 7. FIG. 19 is a flowchart showing the operation of the outdoor control device according to another embodiment of the invention.
The overall configuration of the demand control system, the configuration of the outdoor control device and the inverter device for the outdoor unit, and the configuration of the indoor control device for the indoor unit are the same as in the first embodiment.

In the same manner as in the first embodiment, the outdoor controller 6 sets the outdoor unit control and the operating frequency of the compressor 9 in step 75 in accordance with the operation / stop signals from the remote controller 3 connected to each indoor unit 2 and the indoor unit 2. .

Next, at step 76, the CPU 24 detects the current by the current sensor 8 and uses the current value as the actual compressor 9
The operating power is calculated in step 77 by the product of the compressor operating current and the compressor operating voltage commanded from the CPU 24 to the inverter device 7 in step 77, and step 78
Then, it is checked whether or not there is a demand control command from the demand device 4, and if not, normal operation control is performed. If there is a demand control command, the process jumps to step 79, where it is checked whether it is at or above the command power commanded by the demand control device 4. If it is at or below the command power, the operating frequency is left unchanged at step 80 and the process returns to step 76. If it is the command power or more, the process jumps to step 81, and the CPU 24 sets the operating frequency of the compressor 9 to the inverter device 7 by one rank (for example, 2H).
z) lowering, the CPU 24 again detects the operating current of the compressor by the current sensor 8 in step 82, and calculates the operating power by the product of the operating voltage and the operating frequency of the compressor 9 lowered by one rank in step 83, In step 84, it is checked whether the power is below the command power, and if it is below, step 76
Return to. If it is equal to or higher than the command power, the process returns to step 81 to continue controlling the operating frequency of the compressor.

The power command is transmitted from the demand control device to the outdoor unit at the time when the demand control device determines that it is a demand, and the outdoor unit receives this command and makes a determination in step 78. In this way, the actual demand electric energy (for example, 10 KW or 12 K) is supplied to the outdoor unit connected from the demand control device.
Since W) is transmitted, the demand control can be performed with an arbitrary amount of electric power instead of the control with a constant value.

In this demand control system for an air conditioner, the outdoor control device for the outdoor unit is configured to receive the command operating power from the demand control device based on the demand control signal from the demand control device. Since there is no need for setting and the actual demand command is the electric power value, there is an effect that the demand control of the air conditioner that is continuously variable with respect to the command from the demand control device becomes possible.

The above outdoor unit has a demand command, and when there is no demand release, the demand electric power amount can be transmitted to the indoor unit. Also, regardless of the capacity of the indoor unit,
A certain demand amount (for example, 25%) may be transmitted, and the indoor unit may change the current set temperature by calculating the set temperature corresponding to the demand amount (for example, -1 ° C at 25%). .

[0046]

The demand control system of the air conditioner according to the present invention calculates the operating power by the product of the product of the demand voltage and the operating voltage of the compressor instructed to the inverter device by the outdoor controller during the operation of the air conditioner. Based on the demand control signal from the device, by controlling the operating frequency of the compressor so that the operating power becomes the operating power set in the outdoor control device, the demand control is performed with the actual operating power of the air conditioner. This makes it possible to obtain practical measures against peak cuts.

The demand control system for an air conditioner according to another aspect of the invention is configured such that the demand amount setting switch is provided in the outdoor control device for the outdoor unit so that the demand amount for the air conditioner can be arbitrarily set from the outside. Because
The effect is that the demand control amount can be set for each air conditioner.

Further, in the demand system for an air conditioner according to another invention, when the outdoor control device for the outdoor unit controls the operating frequency of the compressor by demand control, the demand control signal from the demand device is released. Therefore, the compressor operating frequency is set according to the operating load at the time of release, and the operating frequency of the compressor is gradually increased by the preset rising frequency. There is an effect that the electric power can be suppressed to the minimum.

Further, in the demand control system for an air conditioner according to another invention, the outdoor control device of the outdoor unit transmits the demand amount to the indoor control device of the indoor unit based on the demand control signal, and the indoor control device Thus, since the set temperature is changed according to the demand amount, there is an effect that uniform demand control can be performed in each indoor unit.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a demand control system for an air conditioner according to the present invention.

FIG. 2 is a refrigerant system diagram of the air conditioner according to the present invention.

FIG. 3 is a configuration diagram of an outdoor control device according to the present invention.

FIG. 4 is a configuration diagram of an indoor control device according to the present invention.

FIG. 5 is a flowchart of the outdoor control device according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram of an outdoor control device according to a second embodiment of the present invention.

FIG. 7 is a flowchart of an outdoor control device according to a second embodiment of the present invention.

FIG. 8 is a flowchart of an outdoor control device according to a third embodiment of the present invention.

FIG. 9 is an overall configuration diagram of a system according to a fourth embodiment of the present invention.

FIG. 10 is a configuration diagram of a central controller for air conditioning of a fourth embodiment according to the present invention.

FIG. 11 is a flowchart of Embodiment 4 according to the present invention.

FIG. 12 is a flowchart of an outdoor unit of Embodiment 4 according to the present invention.

FIG. 13 is a flowchart of an outdoor unit of Embodiment 4 according to the present invention.

FIG. 14 is a flowchart of an outdoor control device according to a fifth embodiment of the present invention.

FIG. 15 is a flowchart of an indoor control device according to a fifth embodiment of the present invention.

FIG. 16 is an overall configuration diagram of a system of embodiment 6 according to the present invention.

FIG. 17 is a configuration diagram of a demand control device according to a sixth embodiment of the present invention.

FIG. 18 is a configuration diagram of an outdoor control device according to a sixth embodiment of the present invention.

FIG. 19 is a flowchart of an outdoor control device according to a fifth embodiment of the present invention.

FIG. 20 is a block diagram of a conventional demand control system for an air conditioner.

FIG. 21 is a flowchart of a conventional outdoor control device.

[Explanation of symbols]

 1 Outdoor Unit 2 Indoor Unit 3 Remote Controller 4 Demand Device 5 Transmission Line 6 Outdoor Control Device 7 Inverter Device 8 Current Sensor 9 Compressor 10 Indoor Control Device 51 Air Conditioning Central Controller 60 Demand Control Device

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[Procedure amendment]

[Submission date] November 5, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Since the conventional demand control system for the air conditioner is configured as described above, the microcomputer (provided in the demand control device 101 in step 85 of the flow chart in FIG. 21 during operation of the air conditioner ( The CPU 107 checks whether there is a demand command from the demand operation command 103. If there is no demand command, normal operation is performed in step 86. If there is a demand command, the process jumps to step 87, where the demand command is issued. The CPU 107 determines the upper limit value (for example, 30 A) of the operating current of the compressor. Next, the CPU 107 detects the current with the current sensor 105 provided in the inverter control circuit 106, and the current value is measured as the actual compressor 10
4 is converted into an operating current, and it is checked in step 88 whether the current is equal to or higher than the upper limit current. ) Lower. This operation is continued until it becomes less than or equal to the upper limit value. If it is less than or equal to the upper limit value, the process jumps to step 90, where the compressor 10
The operation frequency of No. 4 is maintained as it is, and the operation is continued. In step 91, it is checked whether the demand command from the demand operation command 103 is changed. If the demand command is "demand release", the demand operation is released in step 93 and the process jumps to step 86 to return to the normal operation. If the demand command is "change of demand operation level", the demand operation level is changed in step 94, the process returns to step 87, and the above-described operation is repeated. Regarding the demand device, Japanese Patent Laid-Open No. 114654/1989
There was something like that described in the publication.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

[0017]

EXAMPLES Example 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is an overall configuration diagram of a demand control system for an air conditioner according to the present invention, FIG. 2 is a refrigerant system diagram of the air conditioner,
FIG. 3 is a block diagram of the outdoor control device and the inverter device of the outdoor unit, FIG. 4 is a block diagram of the indoor control device of the indoor unit , and FIG. 5 is an example of a flowchart showing the operation of the outdoor control device.
In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a remote controller, 4 is a demand device, 5 is a transmission line, 6 is an outdoor control device, 7 is an inverter device, 8 is a current sensor, 9 is a compressor, 10 Is an indoor control device, 11 is a refrigerant pipe, 12 is an accumulator, 13 is an outdoor heat exchanger, 14 is an outdoor fan, 15 is a four-way valve, 16 is an electromagnetic valve, 17 is an indoor fan, and 18 is an indoor heat exchanger.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

Reference numeral 19 is a diode module for full-wave rectifying the AC voltage, 20 is a smoothing capacitor for smoothing the full-wave rectified voltage, 21 is a transistor module for converting DC to AC, 22 is a drive circuit, and 23 is a demand device. Input circuit for receiving the signal of 24, a microcomputer (CPU) for controlling the outdoor unit, 25 for a memory, 26 for a transmission circuit for communicating with the indoor unit, and 27 for a fan / electricity inside the indoor unit.
An output circuit that drives a magnetic valve , 28 is a transmission circuit that communicates with the outdoor unit / remolo controller, 29 is a microcomputer (CPU) that controls the indoor unit, and 30 is an output that drives a fan / four-way valve in the indoor unit A circuit, 31 is a memory as a storage means.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

Next, the operation of the present invention will be described.
The transmission circuit 28 in the indoor control device 10 is operated by a start / stop signal from a remote controller connected to each indoor unit 2.
Is received by the CPU 29, and the CPU 29 determines the operation or stop request to the outdoor unit 1 via the transmission circuit 28 accordingly. The transmission circuit 26 in the outdoor control device 6 receives the request, and the CPU 24 determines the outdoor condition. Control the machine 1.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

Example 4. 9 is an overall configuration diagram of a system when the central controller 51 for air conditioning is used, FIG. 10 is a configuration diagram of the central controller for air conditioning, FIG. 11 is a flowchart of the central controller, and FIGS. 12 and 13 are flowcharts of the outdoor unit. . Reference numeral 51 is a central controller for air conditioning that controls each air conditioner , 52 is a microcomputer (CPU) that controls the central controller, 53 is a memory, 54
Is a display device for displaying the operating state of each air conditioner, 55 is a setting input circuit for inputting the operation / stop of each air conditioner, 56 is an input circuit for inputting an ON / OFF signal from the demand device, and 57 is each outdoor It is a transmission circuit that performs transmission with the machine.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

As described above, the power control is performed by the demand control device itself for determining the power value, which is adapted to the power value determination. In this case, the demand of the air conditioner itself is determined.
The amount of electric power is known, and by adding these amounts of electric power, it is possible to calculate the total amount of demand electric power, which enables fine control. Also, by setting the demand amount for each air conditioner with respect to the demand power amount specified by the air conditioner such as 25% and 50%, the total demand power amount can be calculated by adding the power amount. It can be calculated and calculated easily, and practical peak cut measures that anyone can understand will be possible. Further, since the air conditioner performs demand control (capacity saving operation) by the outdoor unit itself, when there are a plurality of systems of outdoor units, the level for demand control can be individually determined by the setting switch. For example, a certain outdoor unit system is set to 25%, a certain system is set to 50%, and a system which does not want to save its capacity is set to 25%. In addition, when the demand is released, all the outdoor unit systems are released at the same time, so the capacity saving operation becomes almost full operation, and the demand control is activated again, and this is repeated. Therefore, in order to prevent this, the capacity is gradually increased, and the operation can be performed even if the demand control does not operate even a little.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 19

[Correction method] Change

[Correction content]

FIG. 19 is a flowchart of an outdoor control device according to a seventh embodiment of the present invention.

Claims (5)

[Claims] 1. An outdoor unit having a built-in compressor, a current sensor for detecting an operating current of the compressor, an outdoor control device provided in the outdoor unit for controlling the outdoor unit, and connected to the outdoor unit. And a demand device that transmits a demand control signal that is a power supply cut command for countermeasures against peak supply power, a compressor operating current detected through the current sensor, and a compressor operating voltage set by the outdoor controller. And a compressor for controlling the operating frequency of the compressor so that the operating power for demand control is preset based on the demand control signal from the demand control device. An demand control system for an air conditioner, comprising: an operation control means. 2. The demand amount setting switch is provided in the outdoor control device so that the operating electric power amount during demand control of the air conditioner can be arbitrarily set.
Demand control system for the air conditioner described. 3. With the demand control cancellation of the air conditioner,
The operating frequency of the compressor is set according to the operating load at the time of release, and the operating frequency of the compressor is gradually increased by the preset rising frequency until the operating frequency reaches the set operating frequency. The demand control system for an air conditioner according to claim 1, which is controlled. 4. An outdoor unit having a built-in compressor, a current sensor for detecting an operating current of the compressor, an outdoor control device provided in the outdoor unit for controlling the outdoor unit, and connected to the outdoor unit. And a demand device for transmitting a power supply amount for peak power supply countermeasures, a compressor operating current detected via the current sensor, and a compressor operating voltage for setting the compressor operation by the outdoor control device. And a compressor operation that is provided in the outdoor control device and that receives a power amount signal from the demand device and controls the operating frequency of the compressor to reach this power amount. A demand control system for an air conditioner, comprising: a control unit. 5. At the time of demand control of the air conditioner, the operating electric energy set by the outdoor control device is transmitted to the indoor control device of the indoor unit by transmission between the indoor and outdoor units, and received by the indoor control device. The demand control system for an air conditioner according to claim 1 or 4, wherein a set temperature for the amount of operating electric power is calculated, and the set temperature during the current operation is changed to perform the operation.