JP6541321B2 - Load operation control device - Google Patents

Description

  The present invention relates to a load operation control device, and more particularly to a device that shuts off a switch to ensure safety when an excessive load current flows.

  When all load currents supplied to a plurality of loads such as facility equipment that consumes power become excessive according to the operating conditions of the load, the time exceeding the rated current of the switch is less than the prescribed time determined in advance. A shutoff control device that shuts off the switch when it does not shut off the switch but exceeds a prescribed time is known as an electronic breaker or the like (patent documents 1 and 2 as similar prior art). This ensures safety. In addition, if the load current is reduced within the specified time, it is possible to maintain the continuity of the switch to continue the operation of the load and to avoid the occurrence of the power failure trip of all the loads. In addition, the rated current of the switch can be selected as low as possible, which makes it possible to miniaturize the switch.

  For determining the contract power between the power company supplying the power and the consumers who consume the power, for example, the cut-off control device, for example, the electronic breaker, is less than 50 kW, for example, and is a main switch rated as a switch. In the case of so-called low-voltage power, which does not require a power receiving and transforming facility with a current of less than 120 to 150 A, the use of the switch is reduced by the rated current of the switch to reduce contract power and reduce low-voltage basic charge. It is desired.

  Therefore, in order to newly install the above-mentioned shutoff control device in a business establishment such as a restaurant with a plurality of existing loads, construction must be performed without stopping sales and operation of the business establishment, and construction work must be simplified. You must. In addition, load reduction is achieved by turning off some of the loads at least temporarily for low power operation with low power consumption, or switching off the load reduction operation to reduce load current by the shutoff control device. The impact of operating the remaining load on the operating and operating status of the establishment must be reduced compared to before it is operated.

  For example, in an air conditioning apparatus whose load is a compression refrigeration type heat pump apparatus, if its start and stop are repeated frequently in a short time by the shutoff control apparatus, it causes a failure of the compressor and is air-conditioned. The temperature of the space, such as the room in which the temperature should be set, fluctuates undesirably.

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-179912 Japanese Patent Application Laid-Open No. 2001-330292

  An object of the present invention is to select a low rated current of a switch that shuts off by ensuring an excessive load current to ensure safety, can simplify installation work, and to avoid an excessive load current. It is possible to reduce the influence of the load that has become the load reduction operation, and to prevent the start and stop of the compression refrigeration heat pump, which is the load, from being repeated frequently in a short time. To provide.

The present invention
(A) The first plurality k1 of loads 9, 10, 11, 12, 13 are provided in the building, and among these loads 9, 10, 11, 12, 13,
(A1) Each load 9, 10, 11 of one or a plurality of k3 (k3 <k1) less than the first plurality k1 is a compression refrigeration type heat pump device 9, 10, 11,
Each compression refrigeration type heat pump device 9, 10, 11
(A1-1) indoor units 25, 25a, 25b having a first heat exchanger provided in the space where the temperature of the building is to be set;
(A1-2) outdoor units 26, 26a, 26b for each compression refrigeration type heat pump apparatus 9, 10, 11 which are collected and installed in the same place outside a building (a1-2-1) second A heat exchanger 28,
(A1-2-2) a compressor 29 circulating a refrigerant to the first and second heat exchangers 27 and 28;
(A1-2-3) In response to the load reduction signal, the compressor 29 is turned off to perform low-power load reduction operation with less power consumption than the normal operation operation before the load reduction signal is given. An outdoor unit 26, 26a, 26b having machine processing means 38, 41, 72;
(A1-3) controlling the temperature of the space when no load reduction signal is given,
(A2) Of the loads 9, 10, 11, 12, 13 of the first plurality k1, the remaining loads 12, 13 are loads 12, 13 other than the compression refrigeration type heat pump apparatus 9, 10, 11 including an elevator. Yes,
(B) a shutoff control device 2 installed in the building,
(B1) Current detection means 16 for detecting all load currents Is of the compression refrigeration type heat pump devices 9, 10, 11 and the remaining loads 12, 13;
(B2) defining means for defining a specified time Wj0 for allowing the continuation of the operation of the load defined in advance for each of the second plurality j of the load currents Is.
(B3) In response to the outputs of the current detecting means 16 and the defining means, the time Wj during which the operation in the current value area Aj corresponding to the detected load current Is continues is measured, and the current value area Aj is changed Time measurement means for resetting the measurement time Wj to zero each time
(B4) The measured time Wj continued in the current value region Aj corresponding to the detected load current Is in response to the outputs of the current detection means 16, the defining means and the time measuring means exceeds the defined time Wj0. Means for deriving a blocking signal when
(B5) a switch 15 responsive to the shutoff signal to shut off the power supplied to all of the compression refrigeration heat pump devices 9, 10, 11 and the remaining loads 12, 13;
(B6) The measured time Wj in which the detected load current Is continues in the current value area Aj in response to the outputs of the current detection means 16, the time measurement means and the definition means, and the definition of the current value area Aj A shutoff control device 2 comprising: means for generating a shutoff notice signal when the difference ΔWj (= Wj0−Wj) with the time Wj0 becomes less than a predetermined shutoff notice time ΔWj0 (ΔWj <ΔWj0);
(C) A transmitter 21 provided in the vicinity of the shutoff control device 2 in the building, wherein
A transmission address setting circuit 45 for setting a transmission address for identifying the switch 15;
A transmitter 21 for transmitting an electromagnetic wave signal together with a transmission address signal representing a transmission address, and a cutoff notification signal;
(D) a line 43 for providing the transmitter 21 with a cutoff notification signal from the cutoff notification signal generation means of the cutoff control device 2;
(E) Each of the outdoor unit processing means 38, 41, 72 is connected to correspond to each other, and transmits and provides a load reduction signal for the corresponding outdoor unit processing means 38, 41, 72. 57,
(F) A receiver 48 provided in the vicinity of the outdoor units 26, 26a, 26b collected and installed at the same place,
(F1) a receiving circuit 49 for receiving an electromagnetic wave signal from the transmitter 21;
(F2) a sequence determination circuit 52 that determines the sequence in which the load reduction operation of the compression refrigeration heat pump devices 9, 10, 11 is performed;
(F3) a reception address setting circuit 53 for setting a reception address for identifying the switch 15;
(F4) individual operation control means,
In response to the outputs of the receiving circuit 48, the sequence determining circuit 52, and the receiving address setting circuit 53, the transmission address represented by the transmission address signal from the transmitter 21 corresponds to the receiving address set in the receiving address setting circuit 53. And the load reduction signal for each compression refrigeration type heat pump device 9, 10, 11 in the order determined by the sequence determination circuit 52 among the compression refrigeration type heat pump devices 9, 10, 11 when the cutoff notification signal is received Through the signal lines 55 to 57 corresponding to the compression refrigeration heat pump devices 9, 10, 11 to the processing units 38, 41, 72 of the individual compression refrigeration heat pump devices 9, 10, 11 An individual operation control means for completing the load reduction operation within less than the cutoff notification time ΔWj0 and thereafter continuing the load reduction operation;
(F5) Load reduction forcing means for continuously forcing the load reduction operation of the compression refrigeration type heat pump devices 9, 10, 11 by the individual operation control means for a predetermined reduction specified time WF, and then returning to the normal operation operation ,
(F6) A receiver 48 comprising: normal operation forcing means for continuing and forcing the normal operation of the compression refrigeration type heat pump apparatus 9, 10, 11 after return by the load reduction forcing means for at least a predetermined regular specified time WN. And a load operation control device.
In the following description, the compression refrigeration heat pump devices 9, 10, 11 may be referred to as a load, an air conditioner, or the like.

  According to the present invention, all loads (e.g., 9 to 9) of one or a plurality of the plurality k1 (e.g., k1 = 7) detected by the current detection means in the shutoff control device (e.g., reference numeral 2 in the embodiment described later) 13, 61, 62) for each of the current value areas Aj (for example, A1 to A4) of one or more second j (for example, j = 4) specified in the continuation defining means, the current value area The time Wj during which the operation in Aj is continued is measured by the time measuring means, and when the time Wj exceeds the continuation specified time Wj0 (for example W10 to W40), the switch 15 loads the load (for example 9 to 13, 61, 62) the power supplied to it is cut off.

  The shutoff control device 2 includes a current detecting means, a continuation defining means, a time measuring means, and a shutoff notice signal generating means. The time measuring means measures a time Wj in which the load current Is detected by the current detecting means exists in the same current value region Aj corresponding to the load current Is. The cutoff warning signal generation means compares the measured time Wj with the continuation regulation time Wj0 of the current value region Aj defined by the continuation regulation means, and the difference ΔW (= Wj0−Wj) is predetermined cutoff. When the advance notice time ΔWj0 is less than (ΔWj <ΔWj0), the cutoff notice signal is generated. The predetermined cutoff notification time ΔWj0 may be, for example, 3 minutes, or may be a value different for each current value region Aj.

  The cutoff notice signal generation means generates a shutoff notice signal when a measured time Wj for each current value area Aj has passed for a predetermined time Wr0 (Wr0 <Wj0) which is less than the continuation prescribed time Wj0. It is also good.

  Further, in response to the outputs of the current detection means, the time measurement means, and the continuation defining means, the cutoff notice signal generating means measures the time Wj during which the detected load current Is continues within the current value region Aj. ) When the current value area Aj is less than the continuation specified time Wj0 and (2) the near specified value Wj01 (Wj01 <Wj0) predetermined to the continuation specified time Wj0 is reached, (3) the near value Wj01 is the continuation specification The difference .DELTA.W1 (= Wj0-Wj01) with the time Wj0 is a short value which is equal to or longer than the time required to achieve the load reduction operation (for example, 1 second), and these three conditions (1) to (3) are satisfied. When configured, it may be configured to generate a shutoff notice signal. The difference ΔW1 between the continuation specified time Wj0 and the close value Wj01 may be the cutoff notification time ΔWj0.

  Such and similar arrangements are to be construed as being included within the spirit of the invention.

  The cutoff notice signal is transmitted by the transmitter as an electromagnetic wave signal. The electromagnetic wave signal may be, for example, wireless, and even if there is an obstacle between it and a receiver that receives it, it may be a frequency of, for example, 920 MHz band which is excellently transmitted due to entrapment of radio waves. Alternatively, it may be realized by infrared light or the like.

The receiver circuit 49 of the receiver 48 receives the electromagnetic wave signal from the transmitter 21. The individual operation control means of the reception processing circuit 51 responds to the received blocking annunciation signal corresponding to the reception address to which the transmission address represented by the transmission address signal from the transmitter 21 is set in the reception address setting circuit 53. Of the loads which are the compression refrigeration type heat pump devices 9, 10, 11 of the first plurality k1 (for example, as described above, k1 = 5), in the order determined by the order determination circuit 52 The predetermined individual loads 9 to 11 of k3 (k3? k1, for example, k3 = 3) are operated at a low load as the low power operation . The time required for one load to be low power operation and complete the load reduction operation after the reception of the cutoff notice signal by the receiver 48 is a time less than the cutoff notice time ΔWj 0, for example, 1 second.

The loads 9 to 13, 61 , 62 of the first plurality k1 may be power loads provided with motors such as the air conditioners 9 to 11, elevator 12, and three-dimensional parking lot 13 in one business office, A resistive load such as the heaters 61 and 62 may be used. Among the loads 9 to 13, 61, and 62, the predetermined individual loads 9 to 11 of one or a plurality of k3 are compression refrigeration type heat pump devices such as an air conditioner. Air conditioner 9-11, a temporary low load operation Ru low power operation der of chicken dexterity electric heater 61 and 62, the elevator 12 is the load 12, 13 of the remaining temporary low power multi-storey car park 13 Compared with low load operation which is operation or interruption, the influence on sales and operation of the establishment is small.

  All the loads 9 to 13, 61, 62 including such predetermined individual loads 9 to 11, 61, 62 are operated at one time, for example, simultaneously, and the measured time Wj in the current value area Aj is When approaching the specified continuous time Wj0, the individual loads 9 to 11, 61, 62 are operated in the low load mode, which is a low power operation or shut off, within the time less than the above-mentioned cutoff notice time ΔWj0. It is possible to prevent the switch 15 from being cut off, and to prevent a situation of a total power failure trip where power is not simultaneously supplied to all the loads 9 to 13, 61, 62 of the first plurality k1.

For example cutoff control unit 2 and the transmitter 21 for load 9-11 it is provided in a building establishments, among individual load 9～11,61,62 the predetermined load 9 to 11, pressure The indoor units 25, 25a, 25b are installed in a building, and the outdoor units 26, 26a, 26b are installed in one place adjacent to the outdoor unit. The outdoor unit 26 includes a refrigerant compressor 29, and the remaining outdoor units 26a and 26b have the same or similar configuration.

  In the present specification, suffixes a, b, ... attached to numerical references may be abbreviated.

  The receiver 48 is provided in the vicinity of the outdoor units 26, 26a, 26b, and shuts off the motor 30 for driving the compressor 29 by receiving the shutoff notice signal, and the indoor units 25, 25a in the air conditioners 9-11. Only the motor of the blower 31b of 25b and the motor of the blower 32 of the outdoor units 26, 26a, 26b are kept driven, and the low power operation of the air conditioners 9 to 11 is performed to perform the low load operation. As a result, the load current Is can be reduced to leave the current value region Aj at the time when the cutoff notice signal is generated, and the switch 15 can be prevented from being blocked as described above.

When the load current Is is reduced and removed from the current value region Aj (for example, A4), if the reduced load current Is is thereafter in another new one, for example, the current value region A _j-1 ( for example A3) , time measuring means resets the measurement time Wj at a current value area Aj (eg A4) in the meantime, in another new current value area a _{j-1 (e.g.} A3), new time W _j from zero The measurement of _-1 is started, and the cutoff warning signal in the current value region Aj (for example, A4) is not generated. When the load current Is is reduced but it does not leave the current value area Aj (for example, A4), the time measuring means continues to measure by integrating the measurement time Wj in the current value area Aj (for example, A4).
When the transmission address represented by the transmission address signal from the transmitter 21 receives the cutoff notice signal corresponding to the reception address set in the reception address setting circuit 53, the load reduction operation is forced by the individual operation control means The predetermined load is a compression refrigeration type heat pump device, such as an air conditioner, a refrigerator, a freezer or the like. In the air conditioner, an indoor unit including a first heat exchanger is provided in a room in a building in which a temperature is to be set, and outside the building, an outdoor unit including a second heat exchanger away from the indoor unit. The machine is installed. The outdoor unit is provided with a refrigerant compressor in the vicinity of the second heat exchanger, and the compressor is driven by a motor. When the individual operation control means of the receiver receives the cutoff notice signal corresponding to the reception address set in the reception address setting circuit 53, the transmission address is one of the compression refrigeration heat pump devices 9, 10, 11 In the order determined by the order determination circuit 52, the load reduction signal for each compression refrigeration type heat pump device 9, 10, 11 and the signal lines 55 to 57 respectively corresponding to the compression refrigeration type heat pump device 9, 10, 11 To the processing circuit 38 of the outdoor unit processing means 38, 41, 72 of the individual compression refrigeration heat pump devices 9, 10, 11 to complete the load reduction operation within less than the cutoff notice time .DELTA.Wj0, Thereafter, the load reduction operation is continued.
This motor is shut off and rested for the purpose of load reduction by the reception of the shutoff notice signal. The repeated operation of the motor for a short time of driving and shutting off the compressor may cause inconvenience in the action of the refrigerant of the air conditioner and may cause a failure. Therefore, the individual operation control means selects the reduction specified time WF to be restored after the motor continues to be stopped as a time interval that does not cause inconvenience in the air conditioner, and this time interval is 5 minutes or 30 minutes, etc. It is also good. Such a configuration is the same as in the case of the air conditioning apparatus, even in a compression refrigeration type heat pump apparatus such as a refrigerator or a freezer.

  The receiver further includes load reduction forcing means and normal operation forcing means. The load reduction forcing means continues to force the load reduction operation by the individual operation control means for a predetermined reduction specified time WF (for example, 3 minutes), and then returns to the normal operation, for example, the rated operation.

  The normal operation forcing means continues and forces the normal operation operation after the return from the load reducing operation by the load reduction forcing means for at least a predetermined normal specified time WN (for example, 6 minutes).

According to the present invention, in view of an excessive load current detected by the current detection means 16, the air conditioner 9 to 11 is a compression refrigeration heat pump apparatus of load, frequent in a short time starting Repeatedly stopping and stopping can prevent causing a failure of a compressor etc., and also prevent the temperature of a space such as a room to be set to be air-conditioned and having an undesired temperature fluctuation. Can. Even with a simplified load, the load reduction forcing means and the normal operation forcing means of the present invention protect the load to avoid failure and reliably achieve the function due to the load.

The present invention
The normal operation forcing means receives normal termination time WN when the cutoff notice signal is received within less than normal prescribed time WN (t34 to t36 in FIG. 15, t45 to t48 in FIG. 17) (t35, t47) At (t36, t48), the load whose normal operation has been forced to continue is characterized by being a load reduction operation.

The present invention
The reduction specified time WF allows the smooth start by reducing the compression load because the differential pressure of the refrigerant between the discharge side and the suction side of the compressor is equalized after the compressor in the normal operation is stopped. Chosen for the time interval
The normal specified time WN is selected as a time interval at which the temperature of the air-conditioned space reaches a predetermined set temperature by the normal operation after the elapse of the reduced specified time WF, or alternatively, the stop of the reduced specified time WF Thus, the time interval is selected to prevent the occurrence of frequent overload of the compressor due to the liquid refrigerant accumulated inside the compressor.

According to the present invention, when receiving the cutoff warning signal, the pre-determined load is forced to the load reduction operation by individual operation control means is a compression refrigeration heat pump apparatus, as an example, for example, air conditioning apparatus, It is a refrigerator, a freezer, etc. For example, in the air conditioning apparatus 9, the indoor unit 25 including the first heat exchanger 27 is provided in the room in the building in which the temperature is to be set, and in the outdoor of the building, the second heat is separated from the indoor unit 25 An outdoor unit 26 including the exchanger 28 is installed. The outdoor unit 26 includes a refrigerant compressor 29 near the second heat exchanger 28, and the compressor 29 is driven by the motor 30. The individual operation control means of the receiver shuts off the motor 30 for load reduction by the reception of the shutoff notice signal and stops. The repetitive operation of starting and stopping the compressor 29 for a short time by the motor 30 may cause inconvenience of the action of the refrigerant of the air conditioner 9 and may cause the failure of the compressor 29. Therefore, the individual operation control means selects the reduction specified time WF to be restored after continuing stopping the motor as a time interval which does not cause inconvenience in the air conditioner, and this time interval is, for example, 3 minutes, 5 minutes or 30 minutes may be sufficient. Such a configuration is the same as in the case of the air conditioning apparatus, even in a compression refrigeration type heat pump apparatus such as a refrigerator or a freezer.

  The normal operation forcing means continues and forces the normal operation after return by the load reduction forcing means for at least a predetermined regular specified time WN. The normal specified time WN is selected by a time interval (for example, 6 minutes) in which the temperature of the space to be air conditioned reaches a predetermined set temperature by the normal operation, or alternatively, by stopping the reduced specified time WF. The time interval is selected to prevent the occurrence of frequent overload of the compressor due to the liquid refrigerant accumulated inside. In this way, inconveniences to the air conditioner are avoided. Usually, the prescribed time WN is, for example, 6 minutes, and may be 3 minutes or 4 minutes.

  The predetermined load may not be a compression refrigeration heat pump device, and may be another load.

FIG. 1 is a block diagram showing an entire configuration of an embodiment of the present invention. It is a figure which shows the tripping operation characteristic which interrupts | blocks switch 15 of the interruption | blocking control apparatus 2. FIG. 5 is a flowchart for explaining the operation of the processing circuit 18 in the shutoff control device 2. FIG. 2 is a block diagram showing an electrical configuration of a first air conditioning apparatus 9; FIG. 2 is a block diagram showing an electrical configuration of a transmitter 21. FIG. 7 is a diagram showing a configuration of a transmission signal 78 from the communication circuit 46. 5 is a flowchart for explaining the operation of the processing circuits 44 and 46 in the transmitter 21. It is a block diagram which shows the electric constitution of the receiver 48 for air conditioning apparatus 9,10,11. FIG. 6 is a diagram showing a configuration of a transmission signal 94 from the communication circuit 49. FIG. 6 is an electric circuit diagram of a two-circuit relay 119 connected to a signal line 116. 5 is a flowchart for explaining the operation of a processing circuit 51 provided in the receiver 48. FIG. 12 is a flowchart for illustrating an operation performed by the processing circuit 51 provided in the receiver 48 following the operation in FIG. 11. FIG. 13 is a flowchart for illustrating an operation performed by the processing circuit 51 provided in the receiver 48 following the operation of step b9 in FIG. 12. It is a flowchart for demonstrating concretely operation | movement of the processing circuit 51 performed in step b5 of FIG. 10 is a timing chart for explaining the operation of the processing circuit 51 of the receiver 48. FIG. 16 is a timing chart for illustrating an operation different from FIG. 15 of the processing circuit 51 of the receiver 48. FIG. FIG. 17 is a timing chart for illustrating an operation different from FIGS. 15 and 16 of the processing circuit 51 of the receiver 48. FIG. FIG. 18 is a timing chart for illustrating an operation different from FIGS. 15 to 17 of the processing circuit 51 of the receiver 48. FIG. FIG. 18 is a timing chart for illustrating an operation different from FIGS. 15 to 18 of the processing circuit 51 of the receiver 48. FIG.

  FIG. 1 is a block diagram showing the entire configuration of an embodiment of the present invention. In this embodiment, in summary, the existing first plurality k (for example, 7) of power consuming loads are provided in association with the building of one office, such as a restaurant, for example, the third Multiple k3 (for example 5) continuously operated first to third compression refrigeration air conditioners 9, 10, 11, electric heaters 61, 62 for cautery and others, and they are used intermittently only for a relatively short time. Elevator apparatus 12 and a three-dimensional parking apparatus 13. In this building, a shutoff control device 2 which can also be called an electronic breaker is newly installed. The interruption control device 2 determines which of the second plurality j (for example, 4) of current value regions Aj all the load currents Is belong to, and the load current Is in the current value region Aj to which the load current Is belongs. The continuous time Wj of the main switch is measured, and the switch 15 such as the main switch is shut off when the predetermined continuous specified time Wj0 for each current value region Aj is exceeded, but the switch 15 is cut below the continuous specified time Wj0. While reducing the rated current I1 and generating a cutoff notice signal immediately before the switch 15 is shut off.

  A signal including the cutoff notice signal from the cutoff control device 2 is transmitted as a wireless electromagnetic wave signal by the transmitter 21 which can also be called a parent device provided in the vicinity of the cutoff control device 2 in the building, and the air conditioner 9 , 10, 11 are received by one receiver 48 provided outdoors and received by a receiver 66 provided in the building for the electric heater 61, 62 for the rooster. The receivers 48, 66 can also be called slaves and have the same configuration. In an environment where the electric field strength for transmitting and receiving radio waves between the transmitter 21 and the receiver 48 is weak, the relay 67 may be interposed.

  The outdoor units 26, 26a and 26b of the air conditioning devices 9 to 11 are collectively provided outdoors and provided adjacent to one place. The receiver 48 is provided in the vicinity of the outdoor units 26, 26a, 26b, and the output from the receiver 48 is transmitted to the outdoor units 26, 26a, 26b via the respective signal lines. Since each of these signal lines may be short, work such as wiring construction work is simplified. Thus, a signal line for transmitting a signal including a cutoff notice signal between the shutoff control device 2 installed in the building and the outdoor units 26, 26a, 26b separated by a relatively long distance is The work of wiring is eliminated.

  Also by the receiver 66 provided in the building for the electric heater 61, 62 for the chicken vat, work such as wiring construction work is simplified.

  Thus, according to the present invention, loads 9 to 13, 61 and 62 are previously installed at one office in FIG. 1, and each of these loads 9 to 13 and 61 and 62 is directly connected to commercial AC power supply 1. In the existing configuration, the cutoff control device 2 is newly provided, and the load current Is of all the loads 9 to 13, 61, 62 is related to the current value region Aj and the prescribed time Wj0 as described above. Control the air conditioners 9-11, 61, 62 controlled to be shut off by the shutoff control device 2 when the shutoff notice signal is generated, and reduce the rated current of the switch 15 If this is the case, it is carried out particularly advantageously.

  Even if some of the air conditioners 9, 10 and 11, the electric heaters 61 and 62 for the cockpit, the elevator 12 and the multistory parking lot 13 are operated simultaneously, the operation of the elevator 12 and the multistory parking lot 13 is completed in a relatively short time. For example, the load current Is is less than the specified time Wj0 of the current value region Aj, and therefore the switch 15 does not shut off.

  On the other hand, during the normal operation of the rating of the air conditioners 9, 10, 11 and the electric heaters 61, 62 for the cautery, the service period during which the elevator 12 and the three-dimensional parking lot 13 are normally assumed, for example, 3 minutes If it is operated continuously for a long time, the load current Is may continue to flow beyond the continuation specified time Wj0 of the current value region Aj, and thus the switch 15 may be cut off.

  According to the concept of the present invention, at the business establishment, the air conditioners 9, 10, 11, and thus the outdoor units 26, 26a, 26b and the electric heater 61, 62 for the cockpit unit, are operated temporarily for the continuous operation of rated normal operation. Since it does not cause much trouble even if it is paused, it enables load reduction operation. On the other hand, since the elevator 12 and the multi-storey parking lot 13 have a large trouble if they stop during the rated normal operation operation, the load reduction operation is not performed, and the continuous operation of the normal operation operation is enabled. Therefore, when there is a possibility that such load current Is may continue to flow beyond the continuation specified time Wj0, the outdoor unit 26 of the air conditioners 9, 10, 11 sequentially until the current value area Aj is removed. Load reduction operation 26a, 26b temporarily suspends the air conditioning of the air conditioners 9, 10, 11 or shuts off the power supply to the electric heater 61, 62 for the cautery unit, and load reduction operation is temporarily performed. To sleep. As a result, the load current Is is reduced to leave the current value range Aj, so that the switch 15 is prevented from being interrupted.

  The shutoff control device 2 has, for example, a configuration similar to that of a conventional electronic breaker, and the power from the commercial AC power supply 1 is supplied from the switch 15 to the power lines 3 to 7, 63, 64. The current detection means 16 detects the individual currents of the power lines 3 to 7, 63, 64, and the load current Is which is the sum of the individual load currents of all these loads 9 to 13, 61, 62. The operation is performed, and a detection signal representing the load current Is is applied to the processing circuit 18 realized by a microcomputer or the like. The processing circuit 18 controls the opening and closing operation of the switch 15. The processing circuit 18 derives a signal including a cutoff notice signal described later via the line 43 from the output terminal 19 and supplies the signal to the transmitter 21.

  FIG. 2 is a diagram showing a tripping operation characteristic for shutting off the switch 15 of the shutoff control device 2. The current value areas A1 to A4 of FIG. 2 and the corresponding prescribed times W10 to W40 are shown in Table 1. The contents of FIG. 2 and Tables 1 and 2 are stored in the memory 23 of the shutoff control device 2 in advance. The continuous specified time W10 to W40 for each current value area A1 to A4 to which the load current Is belongs is a time during which the load current Is exceeding the rated current I1 (for example, 50 A) of the switch 15 is permitted to continue the operation. When the load current Is is less than the rated current I1, the switch 15 is not forcibly cut off. When the current value region Aj is equal to or higher than the rated current I1 and less than the predetermined current value I2, the predetermined continuation specified time W10 is defined. In the current value area A1, when the time Wj in which the load current Is continuously flows in the current value area A1 becomes equal to or longer than the specified time W10, the switch 15 is forcibly shut off. Similar operations are achieved in the other current value regions A2 to A4. When the load current Is is a predetermined current value I5 or more, the switch 15 is immediately forcibly cut off.

  Tables 2 and 3 show examples of specific values of the load currents I1 to I5 and the specified times W10 to W40 shown in FIG. 2 and Table 1, respectively.

  FIG. 3 is a flowchart for explaining the operation of the processing circuit 18 in the shutoff control device 2. Moving from step a1 to step a2, the load current Is of all the loads 9 to 13, 63 and 64 of the plurality k1 (for example, 7 in this embodiment) is detected by the current detection means 16 and supplied to the processing circuit 18. When the processing circuit 18 determines in step a3 that the load current Is is equal to or higher than the rated current I1 (I1) Is), the processing proceeds to the next step a4, and any one of the load current Is in the current value regions A1 to A5 It is determined whether it belongs to the current value region Aj of

  In step a5, it is determined whether or not the load current Is has changed, and the current value region Aj to which the load current Is belongs has changed. When the load current Is leaves any current value area Aj in step a5, the process returns to step a1. If the current value area Aj is changed to another current value area Aj, or if the load current Is becomes less than the rated current I1, then in step a6, the measured time Wj is reset to zero. If there is no change in the current value area Aj, at step a7, the specified time Wj0 corresponding to the load current Is is read from the memory 23 and set. In step a8, the continuous time Wj in the current value region Aj corresponding to the load current Is is measured. This time Wj is a continuing time in one current value area Aj to which the load current Is belongs, and even if the load current Is fluctuates, the measured time if it belongs to the same one current value area Aj. Wj is integrated.

  In step a9, the difference ΔWj (= Wj0−Wj) between the measured time Wj during which the detected load current Is continues in the current value area Aj and the continuation prescribed time Wj0 of the current value area Aj is predetermined. It is determined whether or not it has become less than the cutoff notifying time ΔWj0 (ΔWj <Wj0). The cutoff notification time ΔWj0 may be set to a different value for each current value region Aj, or may be the same common value, and may be, for example, 3 minutes.

  In step a10, when the difference .DELTA.Wj becomes smaller than the cutoff notification time .DELTA.Wj0 (.DELTA.Wj <.DELTA.Wj0), in step a10, a cutoff notification signal is generated and is derived from the output terminal 19 in step a10a.

  Referring back to FIG. 1, the air conditioners 9, 10, 11 are compression refrigeration heat pump devices. In a building, indoor units 25, 25a, 25b are installed in a room where temperature is to be set and maintained, and outdoor units 26, 26a, 26b are installed outside the building. Electric power is supplied to the indoor units 25, 25 a, 25 b and the outdoor units 26, 26 a, 26 b via the power lines 3, 4, 5. Electric power is supplied to the electric heater 61, 62 for the cautery via the power lines 63, 64. Electric power is supplied to the elevator 12 and the three-dimensional parking lot 13 via the power lines 5 and 6.

  The following description mainly applies to the indoor unit 25 and the outdoor unit 26 of the air conditioner 9, but the other air conditioners 10 and 11 are also configured in the same manner as the air conditioner 9. The indoor unit 25 is provided with an indoor heat exchanger 27 which is a first heat exchanger, the outdoor unit 26 is equipped with an outdoor heat exchanger 28 which is a second heat exchanger, and the outdoor heat exchanger 28 is In the vicinity, a compressor 29 for circulating the refrigerant to the indoor and outdoor heat exchangers 27 and 28 is provided. The compressor 29 is driven by a motor 30. Fans 31 and 32 are provided in the indoor and outdoor heat exchangers 27 and 28.

  For cooling, the low-temperature low-pressure gaseous refrigerant generated in the indoor heat exchanger 27 working as an evaporator is compressed by the compressor 29 into a high-temperature high-pressure gas and dissipated in the outdoor heat exchanger 28 working as a condenser And liquefaction, and decompressed by the expansion valve 69 to a liquid of low temperature and low pressure, vaporized in the indoor heat exchanger 27, and a refrigeration cycle is achieved to absorb heat from the room where the temperature is set and maintained by the heat of vaporization. . The heat exchangers 27 and 28 are provided with fans 31 and 32, respectively. For heating, the refrigeration cycle is reversed by a switching valve such as a so-called four-way valve so that the indoor and outdoor heat exchangers 27 and 28 work as a condenser and an evaporator, respectively.

  FIG. 4 is a block diagram showing an electrical configuration of the first air conditioner 9. In the room where the temperature is to be set, a temperature detector 34 is provided to detect the temperature of the room. The operation of the remote controller 35 can start and stop the first air conditioner 9 and set the temperature of the room. The outputs of the temperature detector 34 and the remote controller 35 are given to a processing circuit 36 implemented by a microcomputer or the like. The processing circuit 36 controls the fan 31 and is transmitted from the processing circuit 36 to the outdoor unit 26 through the signal line 37 and is given to the processing circuit 38 for the outdoor unit 26 realized by a microcomputer or the like.

  Electric power from the power line 3 is supplied to the motor 30 for driving the compressor 29 through the motor switch 41. The processing circuit 38 controls the opening and closing of the motor switch 41 in response to the start and stop of the first air conditioner 9. The relay switch 72 of the relay 71 is connected in series to the motor switch 41. The relay coil 73 of the relay 71 is connected to the terminal 77 of the receiver 48 shown in FIG. 8 described later via the terminal 75 and the signal line 55. In the relay 71, when the relay coil 73 is excited and demagnetized, the relay switch 72 is turned on and off, respectively.

  FIG. 5 is a block diagram showing an electrical configuration of the transmitter 21. As shown in FIG. The transmitter 21 includes a processing circuit 44 implemented by a microcomputer or the like. The processing circuit 44 receives the shutoff notification signal from the processing circuit 18 of the shutoff control device 2 via the line 43 as described above. The processing circuit 44 receives the address signal from the address setting circuit 45. The output of the processing circuit 44 is given to a communication circuit 46 which performs transmission and reception operations.

FIG. 6 is a diagram showing the configuration of the transmission signal 78 from the communication circuit 46. As shown in FIG. The transmission signal 78 includes an address 79 represented by the address signal, a cutoff notice signal 80, a transmission confirmation signal 81, and a reception confirmation signal 82. The address 79 is set to individually identify one office shown in FIG. 1 and the other office, and thus to individually identify the switch 15 . The processing circuit 44 provides the communication circuit 46 with a signal including the address 79 from the address setting circuit 45 and the disconnection notice signal 80 from the line 43. The communication circuit 46 includes a processing circuit 85 realized by a microcomputer or the like, and transmits the signal 78 from the antenna 84 by radio waves which are electromagnetic waves in the 920 MHz band, for example. The transmission confirmation signal 81 and the reception confirmation signal 82 are signals for confirming the achievement of transmission and reception between the transmitter 21 and the receiver 48 every 0.2 seconds, for example. , The relay unit 67 is interposed. The display elements 86 such as a plurality of light emitting diodes indicate the presence / absence of the cutoff notice signal 80, the achievement of transmission / reception, and the like.

  FIG. 7 is a flowchart for explaining the operation of the processing circuits 44 and 46 in the transmitter 21. In steps c1 to c2, the disconnection notice signal from the cutoff control device 2 is received, and in the next step c3, the transmission / reception confirmation signals 81 and 82 from the receivers 48 and 66 are received, and the communication state is achieved. After confirming that, in step c4, the display element 86 displays. At step c5, the transmission signal 78 of FIG. 6 is created, and at step c5, the communication circuit 46 transmits radio waves.

  Among the loads 9 to 13, as described above, the outdoor unit 26 of the air conditioner 9 is often collected and installed in the same place along with the outdoor units 26a and 26b of the remaining air conditioners 10 and 11. In order to perform load reduction operation of the outdoor unit 26 of the air conditioner 9 and the outdoor units 26a and 26b of the other air conditioners 10 and 11 installed at the same location when the shutoff notice signal is generated, One receiver 48 for receiving the electromagnetic wave from the transmitter 21 is installed near the outdoor units 26, 26a, 26b.

  FIG. 8 is a block diagram showing the electrical configuration of the receiver 48 for the air conditioners 9, 10, 11. The electromagnetic wave of the signal 78 transmitted from the communication circuit 46 of the transmitter 21 is received by the communication circuit 49 from the antenna 88 of the receiver 48, and the received signal is given to the processing circuit 51 realized by a microcomputer or the like. The receiver 48 is also provided with an order setting circuit 52 that determines the order in which the load reduction operations of the air conditioners 9, 10, 11 and the electric heater 61, 62 for the cockpit are performed, and an address setting circuit 53. The outputs of order setting circuit 52 and address setting circuit 53 are also applied to processing circuit 51. The processing circuit 51 derives control signals for the load reduction operation via the signal lines 55 to 57 individually corresponding to the air conditioners 9, 10, 11.

  The receiver 66 (see FIG. 1) for the electric heater 61, 62 has the same configuration as the receiver 48, and derives a control signal for the load reduction operation through the signal lines 91, 92.

  FIG. 9 is a diagram showing the configuration of the transmission signal 94 from the communication circuit 49. As shown in FIG. The transmission signal 94 includes an address 95 set by the address setting circuit 53, a transmission confirmation signal 96, and a reception confirmation signal 97. The address 95 is set by the address setting circuit 53 to the same value corresponding to the address 79 (see FIG. 6) for setting an address representing one business office shown in FIG. The processing circuit 51 applies a signal including the address 95 from the address setting circuit 53 to the communication circuit 49. The communication circuit 49 includes a processing circuit 99 realized by a microcomputer or the like, and transmits the signal 94 from the antenna 88 by radio waves which are electromagnetic waves of, for example, 920 MHz band. The display element 101 displays the presence / absence of the disconnection notice signal 80, the achievement of transmission / reception, and the like. Such configuration and operation is similar to the transmitter 21.

  Referring again to FIG. 8, the signal for performing load reduction operation of air conditioner 9 from processing circuit 51 is applied to terminal 75 of outdoor unit 26 (FIG. 4) via output circuit 102 and signal line 55. The processing circuit 51 is also connected to output circuits 103 and 104 and signal lines 56 and 57 for the outdoor units 26a and 26b of the air conditioners 10 and 11, respectively.

  The processing circuit 51 further derives a signal for performing load reduction operation of the electric heater 61, 62 for the cockpit, and the output circuits 105, 106 are similarly connected to the signal lines 56, 57 in the receiver 66 (see FIG. 1). Ru.

In the output circuit 102, a low L level signal for performing load reduction operation of the air conditioner 9 from the processing circuit 51 shuts off the switching transistor 108, thereby demagnetizing the relay coil 110 of the relay 109 and thus shutting off. It is derived to the signal line 55 as a signal of 111. Therefore, the relay switch 72 of the relay 71 of the outdoor unit 26 (FIG. 4) is shut off, and the motor 30 remains stopped. The fans 31 and 32 are driven in both the normal operation and the load reduction operation when the air conditioner 9 is controlled to the normal operation for rated operation of the air conditioning by the remote controller 35. . That is, the signal lines 55 to 57 correspond to the respective outdoor unit processing means 38, 41, 72 including the processing circuit 38 and the motor switches 41, 72 of FIG. 4 in the respective outdoor units 26, 26a, 26b. The load reduction signals for the corresponding outdoor unit processing means 38, 41, 72 are respectively transmitted and given.

  The processing circuit 51 conducts the switching transistor 108 by the high H level signal when the load reduction operation of the air conditioner 9 is not performed, and is thus led out to the signal line 55 as a signal of the relay switch 111 which is conducted. Therefore, the relay switch 72 of the relay 71 of the outdoor unit 26 is turned on, and thus the motor 30 is driven when the motor switch 41 is turned on for the rated operation of air conditioning.

The output circuits 103 to 106 are also configured in the same manner as the output circuit 102.
In order to enable the receiver 48 to perform the load reduction operation on one or more other loads all at once, the processing circuit 51 provides a signal for performing the load reduction operation from the line 113 to the photocoupler 114 and the terminal 115 Are derived from the signal line 116.

  The relay 67 (see FIG. 1) has a similar configuration to the receivers 48, 66. In order to achieve the configuration and function as the relay 67 and the receivers 48 and 66, the program of the microcomputer incorporated in the processing circuit 99 and the processing circuit 51 of the communication circuit 49 is shown in FIG. It is modified by externally connecting a computer to the connection terminal 126.

  FIG. 10 is an electric circuit diagram of the two-circuit relay 119 connected to the signal line 116. As shown in FIG. A signal for performing load reduction operation from the signal line 116 demagnetizes the relay coil 120, for example, thereby shutting off the relay switches 121 and 122, and the signal is output from the signal lines 117 and 118. In this way, it is possible to drive other loads all at once or stop them to perform load reduction operation.

  The receiver 48 further includes the operation selecting means 124 shown in FIG. The operation selecting unit 124 may be realized by a dual in-line package (DIP) switch or a memory. The operation selecting means 124 individually selects the fourth plurality of k4 (for example, 5, k4 ≦ k1) selected air conditioners 9, 10, 11 and the electric heater 61, 62 for the cautery table as shown in Table 4 below. As described above, either of the first and second operation modes can be selected and set. In Table 4, the selected first or second operation mode is indicated by "1". In the first operation mode, the load reduction operation changed from the normal operation operation is forced to continue for a predetermined reduction specified time WF in order to leave the current value region Aj for the load current Is less than the specified specified time Wj0, and thereafter Returning to the normal driving operation, the normal driving operation is forced to continue for at least a predetermined normal specified time WN. In the second operation mode, the load reduction operation is continuously forced for a predetermined reduction specified time WF, and thereafter, the normal operation operation is restored.

  As shown in Table 5, the operation selecting means 124 also individually reduces the selected period of time WF in the first operation mode for each of the selected air conditioners 9, 10, 11 and the electric heater 61, 62 for the cockpit. The normal specified time WN and the reduced specified time WF in the second operation mode can be set respectively.

  The air conditioners 9 to 11 operating in the first operation mode may be inconvenient to cause a failure of the compressor due to repeated operations of start and stop for a short time. Therefore, in the first operation mode, the reduction specified time WF and the normal specified time WN are set. The reduction specified time WF and the normal specified time WN of the first operation mode can be set individually for each of the air conditioners 9-11. The reduction specified time WF is a time during which the differential pressure between the refrigerant on the discharge side and the suction side of the compressor is equalized after the motor in normal operation is stopped to reduce the compression load and enable smooth start-up Selected for the interval. The normal specified time WN is selected as a time interval at which the temperature of the air-conditioned space reaches a predetermined set temperature by the normal operation after the elapse of the reduced specified time WF, or alternatively, by the stop of the reduced specified time WF. The time interval is selected to prevent the occurrence of frequent overloads of the compressor due to the liquid refrigerant accumulated inside the compressor.

  In the second mode of operation, the cautery electric heaters 61 and 62 do not have a risk of causing any inconvenience or failure due to repeated operations of short-time power supply and shutoff, or their possibility is low. Therefore, in the second operation mode, only the reduction specified time WF is set. The reduction specified time WF of the second operation mode can be set individually for each of the electric heaters 61 and 62 for the cautery.

  11 to 13 are a series of flowcharts for explaining the operation of the processing circuit 51 provided in the receiver 48. Moving from step b1 to step b1a of FIG. 11, the signal 78 (FIG. 6) from the transmitter 21 is received by the communication circuit 49, the transmission / reception confirmation signals 81 and 82 included in the signal 78 are received, and the communication state is achieved. In step b2, the address set by the address setting circuit 45 of the transmitter 21 included in the signal 78 corresponds to the address set by the address setting circuit 53 of the receiver 48 in step b2. It is collated whether or not it agrees, and if it agrees, in step b2a, display by the display element 101 is performed. In the next step b2b, the transmission signal 94 of FIG. 9 is created, and in step b2c, the communication circuit 46 transmits radio waves.

  FIG. 12 is a flow chart for explaining an operation performed by the processing circuit 51 provided in the receiver 48 following the operation in FIG. Moving from step b2c of FIG. 11 to step b3 of FIG. 12, the normal operation operation of the air conditioning control of the first to third air conditioners 9, 10, 11 is executed. In step b4, it is judged whether or not the interruption notice signal 80 (FIG. 6) has been received. If it has been received, the process proceeds to step b5.

  FIG. 14 is a flowchart for specifically explaining the operation of the processing circuit 51 executed in step b5 of FIG. The first, second and third air conditioners 9, 10 and 11 set by the sequence setting circuit 52 in steps d1 to d2 by the reception of the disconnection notice signal 80, and the electric heaters 61 and 62 for the cockpit unit According to the order in which the load reduction operation is performed, for example, in this order, one of the air conditioners 9, 10, 11 such as the air conditioner 9 is determined as the load set in the first operation mode. At step d3, it is judged by the operation selecting means 124 that the air conditioner 9 is set to the first operation mode as shown in Table 4 described above. At step d4, the load reduction operation is forced to continue for the reduction specified time WF set as shown in Table 5. Thereafter, in step d5, the normal operation operation is resumed and forced to continue the normal operation operation for at least a predetermined regular specified time WN set as shown in Table 5. The process moves to step d6 and ends.

  If the load whose order is set in step d2 is not set to the first operation mode, for example, any of the electric heaters 61 and 62 for the cautery, it is set to the second operation mode in step d7. If so, the load reduction operation in the second operation mode is forced to continue in step d8 for the reduction specified time WF in Table 5.

  When the load reducing operation of the air conditioner 9 is performed in step b5 of FIG. 12, the processing circuit 51 performs the air conditioning of the low L level signal representing the load reducing operation through the signal line 55 for the load reducing operation. The relay 71 included in the outdoor unit 26 of the device 9 is provided, and the relay switch 72 is shut off. As a result, the operation of the motor 30 driving the compressor 29 is stopped. The fans 31 and 32 provided in the indoor unit 25 and the outdoor unit 26 of the first air conditioner 9 are continuously driven.

  In step b6, it is determined whether or not the disconnection notice signal has been further received, and if not received, the second and third air conditioners 10 and 11 continue the normal operation.

  If the disconnection notice signal is received in step b6, the air conditioner 10 which is the next order of the air conditioner 19 in the next step b7 is executed as shown in FIG. , Load reduction operation and normal operation operation. If the disconnection notice signal is further received in step b8, the process proceeds to the next step b9 and is performed as shown in FIG. 14 to control the air conditioner 11 to the same load reducing operation and normal operation as described above.

  In the order setting circuit 52, when the order of the loads subjected to the load reduction operation is set more, steps b6, b7; b8, b9 are similarly executed.

  FIG. 13 is a flowchart for illustrating an operation performed by the processing circuit 51 provided in the receiver 48 subsequent to the operation of step b9 in FIG. If the disconnection notice signal is not received in steps b6 and b8, the duration Wm of the load reduction operation is measured in step b10 of FIG. In step b11, it is determined whether it is time (WF ≦ Wm) that the duration Wm measured in step b11 has elapsed by a predetermined reduction specified time WF (ΔWj0 <WF) exceeding the cutoff notice time ΔWj0. If WF ≦ Wm, the process proceeds to the next step b12, and finally one of the air conditioners 9 to 11 forced to perform the load reduction operation (for example, the air conditioner 11) is Return to rated normal operation.

  In step b13, it is judged whether or not the cutoff notice signal has been received, and if it has been received, the process proceeds to the next step b14, and the last air conditioner (for example, the air conditioner 11) which has returned is operated to reduce the load again. It returns to step b10.

  After returning one of the air conditioners 9 to 11 forced to the last load reduction operation (for example, the air conditioner 11) in step b13, if the cutoff notice signal is not generated, the steps b13 to b15 To the order in which the load reduction operation was performed, for example, in the reverse order of the order of 9 to 11 of the first, second and third air conditioners, ie, the third, second and first air conditioners. In the order of the devices 11, 10, 9, the operating state of the normal load before the occurrence of the interruption warning signal is restored sequentially. After returning one of the air conditioners 9 to 11 (for example, the air conditioner 11) in step b16, if the cutoff notice signal is received, the air conditioner returned to in step b15 (for example, In step b17, the air conditioner 11) is forced to perform the load reduction operation again. If the disconnection notice signal is not received in step b16, the process returns to step b10, measures the duration Wm of the load reduction operation from the return time of the restored air conditioner (for example, the air conditioner 11), and Is repeated. In steps b14 and b17, the same operation as in FIG. 14 is performed.

  FIG. 15 is a timing chart for explaining the operation of the processing circuit 51 of the receiver 48. When the cutoff notification signal in the current value area Aj is generated in step a10 of FIG. 3 from the processing circuit 18 of the cutoff control device 2, the cutoff notification signal received by the communication circuit 49 of the receiver 48 is as shown in FIG. At time t1, the high H level changes to the low L level as shown in FIG. In step b5 of FIG. 12, the processing circuit 51 forces the first air conditioning apparatus 9, which has not been the load reduction operation until then, to perform the load reduction operation at time t2 of FIG. 15 (2). Thus, if processing circuit 18 of shutoff control device 2 determines that load current Is deviates from any current value region Aj at time t3, it is determined in advance from time t2 if it is determined in step a5 of FIG. At time t4 when the specified time WF (= (t4-t2)) has elapsed, at step b12 in FIG. 13, the first air conditioning apparatus 9 returns to the normal operation mode before generation of the shutoff notice signal again, The normal operation is forced to continue until at time t5 at least a predetermined normal specified time WN elapses. At the time t5, if the disconnection warning signal is not generated, the normal operation operation is maintained. Fig. 15 (3) and Fig. 15 (4) show a state in which the second and third air conditioners 10 and 11 are maintained in a normal operating state which is not a load reduction operation.

  When the stop of the first air conditioning device 9 is operated by the operation of the remote controller 35 before the time t2, the first air conditioning device 9 performs the load reduction operation such as the stop immediately when the stop is operated. Be done. After time t2, when the stop of the first air conditioner 9 is operated by the operation of the remote controller 35 before the time t5, the first air conditioner 9 performs a load reduction operation such as stop at the time t5. Be done.

  FIG. 16 is a timing chart for explaining an operation different from that of FIG. 15 of the processing circuit 51 of the receiver 48. The operation of FIG. 16 is partially similar to the operation of FIG. 15 described above. It should be noted that when the cutoff notification signal in the current value region Aj is generated from the processing circuit 18 of the cutoff control device 2, the cutoff notification signal received by the communication circuit 49 of the receiver 48 is as shown in FIG. As shown, the high H level changes to the low L level at time t31. Therefore, the first air conditioning apparatus 9, which has not been the load reducing operation until the normal operation, is forced to the load reducing operation at time t32 in FIG. 16 (2). Accordingly, if it is determined that processing circuit 18 of shutoff control device 2 removes load current Is from any current value region Aj at time t33, predetermined reduction specified time WF (= (= (= At time t34 when t34-t32)) elapses, the first air conditioning apparatus 9 returns to the normal operation mode again, and is forced to continue the normal operation mode until at least time t36 when at least a predetermined normal specified time WN elapses. Be done. Since the shutoff notice signal is generated at time t35 before time t36 and at this time t36, the shutoff notice signal is still generated, so in step 12 of FIG. Become. The second and third air conditioners 10 and 11 are maintained in the normal operation operation, which is not the load reduction operation, as in FIGS. 15 (3) and 15 (4) described above. At time t37 after time t36, as indicated by the broken line, when the cutoff notice signal is not generated, the air conditioner 9 immediately starts the normal operation at time t38.

  FIG. 17 is a timing chart for explaining an operation different from FIGS. 15 and 16 of the processing circuit 51 of the receiver 48. In the operation selection means 124, in this embodiment, the reduction prescribed times WF of the first to third air conditioners 9, 10, 11 are set to the same value, and the normal prescribed times WN are set to the same value. It is set. FIG. 17 (1) shows the shutoff notice signal received by the receiving circuit 49, and when the shutoff notice signal is received at time t11, the first air conditioner 9 which has been operated in the normal operation state until then is At time t12 in FIG. 17 (2), the load reduction operation is forced. Furthermore, in step b6 of FIG. 12, if the cutoff notification signal is still received, the second air conditioner 10 is sequentially set in the order set by the order setting circuit 52 as shown in FIG. 17 (3). The load reduction operation is forced at time t13.

  The first and second air conditioners 9 and 10 are forced to perform the load reduction operation for the reduction specified time WF from time t12 and t13, respectively. It is determined at time t14 that the processing circuit 18 of the cut-off control device 2 has left the load current Is from any current value region Aj by these load reduction operations. At time t15 and t16 when steps b11 and b12 of FIG. 13 have passed by each reduction specified time WF in step b13, the first and second air conditioners 9 and 10 return to the state of normal operation again. The normal operation is forced to continue until times t17 and t18 when only a predetermined normal specified time WN elapses. If no disconnection warning signal is generated at times t17 and t18, the normal operation operation is maintained. FIG. 17 (4) shows a state in which the third air conditioning apparatus 11 is maintained in a normal operating state that is not a load reduction operation.

  FIG. 18 is a timing chart for explaining an operation different from FIGS. 15 to 17 of the processing circuit 51 of the receiver 48. The operation of FIG. 18 is partially similar to the operation of FIG. 17 described above, and the operation of time t41 to t46 of FIG. 18 (1) to FIG. 18 (3) is similar to that of FIG. It is similar to the operation of time t11 to t16. It should be noted that at time t47 after time t46, when the cutoff notice signal is received, the first and second air conditioners 9 and 10 pass the normal specified time WN which has been operated in the normal operation. The load reduction operation is performed after time t48 and t49.

  FIG. 19 is a timing chart for explaining an operation different from that of FIGS. 15 to 18 of the processing circuit 51 of the receiver 48. In this embodiment, at the time of continuous reception of the disconnection notice signal, the order setting circuit 52 sets the load reduction operation in the order of the first to the third air conditioners 9, 10, and 11 which are set to be late. The respective reduction specified times WF9, WF10, and WF11 are set to be short in this order by the operation selecting means 124 (WF11 <WF10 <WF9). The normal prescribed times WN9, WN10 and WN11 of the first to third air conditioners 9, 10 and 11 are set shorter in this order by the operation selecting means 124 (WN11 <WN10 <WN9) or set equal (WN11 = WN10 = WN9). Other configurations and operations are similar to the above-described embodiment.

  When the cutoff notice signal is generated in step b4 of FIG. 12 at time t21 of FIG. 19 (1), the first air conditioning apparatus 9 is forced to perform the load reducing operation in step b5 at time t22 of FIG. Further, the second and third air conditioners 10 and 11 are forced to the load reduction operation at times t23 and t24 in steps b7 and b9 sequentially in this order set by the order setting circuit 52, respectively. Thereafter, at time t25, the cutoff notice signal is not generated. The first to third air conditioners 9 to 11 are forced to continue the load reduction operation only for the reduction specified times WF9, WF10, and WF11 from time t22 to t24 to time t26 to t28. As described above, since the reduction prescribed times WF9, WF10, and WF11 of the first to third air conditioners 9, 10, and 11 are set to be short in this order, the order in which the load reduction operation is forced is reversed. In the normal operation mode, the operation is restored.

  Thus, when the cutoff notice signal is received, the predetermined first to third air conditioners 9 to 11 are forced to perform the load reduction operation in this order, and the reverse of the order to the load reduction operation. In order, that is, sequentially in the order of the air conditioners 11, 10 and 9, the load reduction operation is restored to the rated normal operating load condition. Therefore, the load reducing operation of the third air conditioning apparatus 11 that greatly affects the temperature change of the space where the temperature should be set should be as short as possible than the first air conditioning apparatus 9 with a small influence. And the space can be kept as constant as possible at the temperature set by the remote controller 35.

  In another embodiment of the present invention, the temperature change of the space is made in steps b5, b7 and b9 of FIG. 12 even if the reduction prescribed times WF9, WF10 and WF11 are set equal by the operation selecting means 124. In the order from the first air conditioning apparatus 9 having a small influence to the third air conditioning apparatus 11 having a large influence, the load reduction operation is forced to continue, and after the load reduction operation is forced to continue, steps b12 and b15 in FIG. In the above, the return to the normal operation load may be performed in order from the third air conditioning apparatus 11 that largely affects the temperature change of the space to the first air conditioning apparatus 9 having a small influence.

  As described above, since the air conditioners 9 to 11 are sequentially restored in the reverse order of the order in which the load reduction operations are sequentially forced, the air conditioners 9 to 11 are forced to perform the load reduction operations. Among them, select the air conditioners 9 to 11 that cause large undesirable effects due to the load reduction operation, for example, the temperature to be held in the room, behind the order of shifting to the load reduction operation, and load By setting the order of returning from the reduction operation to the normal load operating condition in the reverse order, it is possible to minimize the fluctuation of the temperature to be held in the room as much as possible.

  Similar to the order of the loads including the electric heaters 61 and 62 for the cockpit, the elevator apparatus 12, the three-dimensional parking lot apparatus 13 and the like in addition to the air conditioners 9 to 11, the steps are arranged in the same order. The present invention can be realized by further increasing the same.

The present invention is capable of the following embodiments.
(1) The individual operation control means
The sequential load reduction means is further included for reducing the load of the other individual load previously determined when the cutoff warning signal is received while the load reduction operation is completed within the cutoff warning time ΔWj0. It is characterized by

  The individual operation control means includes sequential load reduction means. The sequential load reducing means completes the load reducing operation within less than the cutoff notification time ΔWj0, and when the cutoff notification signal is still received in the same current value region Aj, the cutoff notification time. Load reduction is further performed on another individual load which is further predetermined within ΔW j 0.

(2) The individual operation control means
A means for measuring a duration Wm in which the load reduction operation is continued;
When the cutoff notice signal is not received when the measured continuation time Wm passes by the predetermined reduction specified time WF (ΔWj0 <WF) exceeding the cutoff notice time ΔWj0, then the cutoff notice signal is It is characterized by including an operation return means for returning to the operation of the load before the occurrence.

  When continuing load reduction operation of individual loads less than 1 or 3rd plural k3 and leaving from any current value region Aj, the continued time Wm is predetermined to exceed the cutoff notice time ΔWj0 When the cutoff notification signal is not received when the reduction specified time WF has elapsed, the load for which the load reduction operation is continued is restored to the operation before the cutoff notification signal is generated.

  (3) The operation recovery means sequentially restores the loads in the reverse order of the load reduction order by the sequential load reduction means when the cutoff notice signal is not generated.

The load reduction operations are sequentially returned in the reverse order of the order in which the load reduction operations were forced. Therefore, for example, among the plurality of air conditioners 9 to 11 forcibly forced to the load reduction operation as in the above-described embodiment, the load reduction operation may cause a small undesired fluctuation in the temperature to be held in the room Are selected ahead of the order of change to the load reduction operation and those that result in large undesirable fluctuations are selected behind. In order to sequentially restore the load operation, the order is reversed from the order of the load reduction operations. For this reason, the load reduction operation is forced as much as possible for a period as short as possible which causes large undesirable fluctuation in the temperature to be held in the room, thereby minimizing the fluctuation of the temperature to be held in the room. The temperature can be kept to the desired value as much as possible. The order of the loads other than the air conditioners 9-11 is also chosen such that the undesirable effects of being forced into a temporary load reduction operation of the operating condition are reduced.
(4) The receiver further includes operation selecting means, and the operation selecting means
Individually for each one of the first plurality of k1 loads or the fourth plurality of k4 (k4 ≦ k1) loads
A first operation mode that activates both the load reduction forcing means and the normal operation forcing means;
It is possible to select and set either of the second operation mode that activates the load reduction forcing means and deactivates the normal operation forcing means,
A reduction regulation time WF of the load reduction forcing means in the first operation mode, a normal regulation time WN of the normal operation forcing means, and a reduction regulation time WF of the load reduction forcing means in the second operation mode can be set respectively. .
Loads 9 to 11 operating in the first operation mode are, for example, typically compression refrigeration type heat pump devices, for example, an air conditioner, a refrigerator, a freezer, etc. The repeated operation of start and stop, that is, drive and shut off may cause inconvenience and cause failure of the compressor. For each load individually, in the first operation mode, the reduction specified time WF is, for example, 3 minutes, and may be set to 5 minutes or 30 minutes, etc. The normal specified time WN of the normal operation forcing means is set, for example It may be set to 6 minutes, 3 minutes or 4 minutes, etc.
The load operating in the second operation mode may be, for example, a resistive load such as an electric heater 61 or 62 for a chicken eater, or a power load provided with a motor such as an elevator 12 or a three-dimensional parking lot 13. The load reduction operation is an operation which is stopped by, for example, cutting off the supply of power. These loads are unlikely to cause inconvenience or failure due to repeated operation of short-time drive and shut-off, or their possibility is low.
Individually for each load, in the second operation mode, the reduction specified time WF is, for example, 4 seconds, and may be set to 1 second or the like, or may be a short time near or near zero.
For example, in a configuration in which a plurality of various loads 9 to 11; 61, 62, 12, 13 are controlled by a single receiver, setting of operation in the first and second operation modes is easy.
(5) (a) A shutoff control device,
Current detection means for detecting the load current Is of all the loads of the first plurality k1;
Continuation specifying means for specifying a continuation specified time Wj0 for permitting operation continuation of the load defined in advance for each of the current value areas Aj of the 1 or the plurality of the plurality j of the load current Is;
Time measurement means for measuring a time Wj during which operation in the current value area Aj corresponding to the detected load current Is is continued, corresponding to the output of the current detection means and the continuation definition means;
When the measured time Wj continued in the current value region Aj corresponding to the detected load current Is in response to the outputs of the current detecting means, the continuation defining means and the time measuring means exceeds the continuation defined time Wj0 , Means for deriving a blocking signal,
A switch responsive to the shutoff signal to shut off the supply of power to all the loads;
In response to the output of the current detection means, the time measurement means, and the continuation defining means, the measured load current Is detected continuously in the current value area Aj, and the continuation specified time Wj0 of the current value area Aj. A shutoff control device comprising: means for generating a shutoff notice signal when a difference ΔWj (= Wj0−Wj) between the two and the predetermined shutoff notice time ΔWj0 (ΔWj <ΔWj0) is reached.
(B) a transmitter for transmitting an interruption notice signal as an electromagnetic wave signal;
(C) a receiver,
(C1) a receiving circuit for receiving a signal from the transmitter;
(C2) A predetermined individual load of a third plurality k3 (k3 <k1) of one or less than the first plurality k1 of the loads corresponding to the output of the receiving circuit and receiving the cutoff notification signal, Individual operation control means for reducing the load by reducing the power consumption or reducing the power consumption less power consumption than the normal operation before the occurrence of the cutoff notice signal, and completing this load reduction operation within less than the cutoff notice time ΔWj0;
(C3) a receiver including: load reduction operation by the individual operation control means, continuously forcing the load reduction operation for a predetermined reduction specified time WF, and then returning to the normal operation operation; Do.
The load may be, for example, a resistive load such as an electric heater 61 or 62 for a rooster, or may be a power load including a motor such as the elevator 12 or the three-dimensional parking lot 13. These loads are unlikely to cause inconvenience or failure due to repeated operation of short-time drive and shut-off, or their possibility is low. The load reduction operation is an operation that is stopped by, for example, cutting off the power supply, and the reduction specified time WF is, for example, 4 seconds, and may be set to 1 second or the like, or zero or near zero. It may be short. The load reduction operation may be an operation in which the power of the load is reduced, for example, as compared to rated normal operation.

DESCRIPTION OF SYMBOLS 1 commercial alternating current power supply 2 interruption | blocking control apparatus 9 1st air conditioning apparatus 10 2nd air conditioning apparatus 11 3rd air conditioning apparatus 12 elevator apparatus 13 three-dimensional parking lot apparatus 15 switch 16 electric current detection means 18,36,44,51,85, 89, 99 processing circuit 21 transmitter 25, 25a, 25b indoor unit 26, 26a, 26b outdoor unit 27 indoor heat exchanger 28 outdoor heat exchanger 29 compressor 30 motor 31, 32 fan 41 motor switch 48, 66 receiver 52 Reduction order setting circuit 61, 62 Electric heater 80 for burn-in device Interruption notice signal 124 Operation selection means

Claims (3)

(A) The first plurality of loads k1 are provided in the building, and among these loads,
(A1) Each load of one or a plurality of k3 (k3 <k1) less than the first plurality k1 is a compression refrigeration type heat pump device,
Each compression refrigeration heat pump device
(A1-1) an indoor unit having a first heat exchanger provided in a space where a temperature of a building is to be set,
(A1-2) It is an outdoor unit for each compression refrigeration type heat pump apparatus which is collected and installed at the same place outside the building,
(A1-2-1) second heat exchanger,
(A1-2-2) a compressor circulating a refrigerant to the first and second heat exchangers,
(A1-2-3) The outdoor unit performs a low power load reduction operation that consumes less power than the normal operation operation before stopping the compressor and receiving the load reduction signal in response to the load reduction signal. And an outdoor unit having processing means for
(A1-3) controlling the temperature of the space when no load reduction signal is given,
(A2) Of the loads of the first plurality k1, the remaining loads are loads other than the compression refrigeration heat pump apparatus including an elevator,
(B) a shutoff control device installed in the building ,
(B1) Compression refrigeration type heat pump apparatus and current detection means for detecting all load currents Is of the remaining loads ;
(B2) defining means for defining a specified time Wj0 for allowing the continuation of the operation of the load defined in advance for each of the second plurality j of the load currents Is.
(B3) In response to the outputs of the current detecting means and the defining means, the time Wj during which the operation in the current value area Aj corresponding to the detected load current Is continues is measured, and the current value area Aj is changed The time measuring means which measures and resets the measuring time Wj to zero each time ,
(B4) The measured time Wj continued in the current value region Aj corresponding to the detected load current Is in response to the outputs of the current detection means, the definition means, and the time measurement means exceeds the specified time Wj0 And means for deriving a blocking signal,
(B5) a switch responsive to the shutoff signal to shut off the power supplied to the compression refrigeration heat pump and all remaining loads ;
(B6) The measured time Wj in which the detected load current Is continues in the current value area Aj in response to the outputs of the current detection means, the time measurement means and the definition means, and the specified time of the current value area Aj A shutoff control device comprising: means for generating a shutoff notice signal when a difference ΔWj (= Wj0−Wj) with Wj0 becomes less than a predetermined shutoff notice time ΔWj0 (ΔWj <ΔWj0).
(C) a transmitter provided in the building near the shutoff control device ,
A transmission address setting circuit for setting a transmission address for identifying the switch;
A transmitter for transmitting an electromagnetic cutoff signal, together with a transmission address signal representing a transmission address ,
(D) a line for giving the transmitter an interruption notice signal from the interruption notice signal generating means of the interruption control device to the transmitter;
(E) A signal line which is connected to correspond to each outdoor unit processing means, and transmits and gives a load reduction signal for the corresponding outdoor unit processing means,
(F) A receiver provided in the vicinity of an outdoor unit collected and installed at the same location ,
(F1) a receiving circuit for receiving an electromagnetic wave signal from the transmitter;
(F2) a sequence determination circuit that determines a sequence for performing load reduction operation of the compression refrigeration type heat pump device;
(F3) a reception address setting circuit for setting a reception address for identifying the switch;
(F4) individual operation control means,
In response to the outputs of the receiving circuit, the sequence determining circuit, and the receiving address setting circuit, the transmission address represented by the transmission address signal from the transmitter corresponds to the blocking notice signal corresponding to the receiving address set in the receiving address setting circuit. When received, the load reduction signal for each compression refrigeration type heat pump device is transmitted through the signal line corresponding to the compression refrigeration type heat pump device in the order determined by the sequence determination circuit among the compression refrigeration type heat pump device, An individual operation control means for giving the load reduction operation to the processing means for the outdoor unit of the individual compression refrigeration type heat pump apparatus and completing the load reduction operation within less than the cutoff notification time ΔWj0 and thereafter continuing the load reduction operation;
(F5) Load reduction forcing means for continuously forcing the load reduction operation of the compression refrigeration type heat pump apparatus by the individual operation control means for the predetermined reduction specified time WF, and then returning to the normal operation operation;
(F6) A receiver comprising: normal operation forcing means for continuing and forcing the normal operation of the compression refrigeration type heat pump after return by the load reduction forcing means for at least a predetermined regular specified time WN. Operation control device of the load.   The normal operation forcing means loads the compression refrigeration heat pump device whose normal operation has been forced to continue when the normal prescribed time WN has elapsed, when the cutoff notice signal is received within the normal prescribed time WN. The load operation control device according to claim 1, wherein the operation is reduced. The reduction specified time WF allows the smooth start by reducing the compression load because the differential pressure of the refrigerant between the discharge side and the suction side of the compressor is equalized after the compressor in the normal operation is stopped. Chosen for the time interval
The normal specified time WN is selected as a time interval at which the temperature of the air-conditioned space reaches a predetermined set temperature by the normal operation after the elapse of the reduced specified time WF, or alternatively, the stop of the reduced specified time WF 3. The load operation control device according to claim 1, wherein the time interval is selected to prevent the occurrence of frequent overload of the compressor due to the liquid refrigerant accumulated inside the compressor.

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