JP4532376B2 - Air conditioning controller - Google Patents

Description

  The present invention relates to an air conditioning control device for an air conditioner used in, for example, a railway vehicle, and more particularly to an air conditioning control device having a function of backing up the operation of the air conditioning device when an abnormality occurs in the control device. .

  Conventionally, this type of air conditioner monitors indoor and outdoor fans, a plurality of compressors, a plurality of protective devices provided for each compressor to protect each compressor, and monitors the compressors through the protective devices, An indoor fan, an outdoor fan, an air conditioning control device having a controller for controlling the operation of the plurality of compressors, and the like are provided. When two air conditioners are installed, the controllers of both air conditioning controllers have a function to detect their own abnormalities, and when abnormalities are detected, notify them and notify them of abnormalities. In response to this, instead of the controller that caused the abnormality, the air conditioner is backed up and a plurality of compressors are monitored through a protective device (the publication describing this prior art). There was nothing.

  In the conventional air conditioning control device described above, when two air conditioners are installed, a means for notifying abnormality and a means for notifying the monitoring status of the protective device are required, so an input / output port is necessary. Moreover, the wiring between the air conditioning control devices has increased. In addition, the side that received the abnormality notification had to perform a backup operation while monitoring the state of the protective device, and the circuit configuration was complicated and the control software had to be complicated.

  The present invention has been made to solve the above-described problems, and does not require a backup operation while monitoring the state of the protective device without using a means for notifying the monitoring state of the protective device. It aims at providing an air-conditioning control device.

  An air conditioning control device according to the present invention includes a manual operation circuit for operating an air conditioner based on a sequence set in advance during manual operation, and a plurality of protective devices provided for protecting a compressor of the air conditioner. When the operation of any protective device is detected, the information is output, and the protection information input circuit that disables the operation of the compressor by the manual operation circuit, and the air conditioner is automatically controlled during automatic operation. , Equipped with an air conditioning controller that stops the compressor operation when information from the protection information input circuit is detected, and a backup air conditioning controller. The air conditioning controller backs up abnormal information when it detects an abnormality. The backup air conditioning controller controls the air conditioner through the manual operation circuit when notified of the abnormality information.

  The air conditioning control device according to the present invention includes a manual operation circuit that operates the air conditioner based on a sequence set in advance during manual operation, and a plurality of protections provided for protecting the compressor of the air conditioner. A protection information input circuit that outputs the information when the operation of the device and any of the protection devices is detected, and disables the operation of the compressor by the manual operation circuit, and the air conditioner automatically during automatic operation Each of the plurality of air conditioners is provided with an air conditioning controller that controls and stops operation of the compressor when information from the protection information input circuit is detected, and each air conditioning control provided in the plurality of air conditioners When an abnormality is detected, the air conditioner notifies the abnormality information. When the abnormality information is received, the air conditioner controls the air conditioner through the abnormal manual operation circuit instead of the air conditioning controller that has notified the abnormality information. That.

  In the present invention, when the backup air-conditioning controller controls the air conditioner through the manual operation circuit, if any of the plurality of protective devices is activated, the protection information input circuit operates the compressor by the manual operation circuit. Since the backup air conditioning controller does not need to perform a backup operation while monitoring the state of the protective device, the control software can be simplified.

  In the present invention, when the abnormality information is received, the air conditioner is controlled through the abnormal-side manual operation circuit instead of the air conditioning controller that has notified the abnormality information. When activated, the protection information input circuit disables the compressor operation by the manual operation circuit. Therefore, it is necessary to perform backup operation while monitoring the status of the protection device in the air conditioning control device that is notified of the abnormality information. The control software can be simplified. Further, since a means for notifying the monitoring state of the protective device is not required, the wiring between the air conditioning control devices can be reduced.

Embodiment 1 FIG.
FIG. 1 is a circuit diagram of an air conditioning control device showing Embodiment 1 of the present invention, FIG. 2 is a circuit diagram showing a protection information input circuit of the air conditioning control device, and FIG. 3 is a circuit diagram showing a manual operation circuit of the air conditioning control device. is there.
The air-conditioning control apparatus of Embodiment 1 is provided in an air conditioner for a railway vehicle having, for example, three compressors (not shown), and includes an automatic / manual changeover switch 10 and three protection information input circuits 20. A manual operation circuit 30, an air conditioning controller 40, a backup air conditioning controller 50, and a backup circuit 60 are provided.

  The protection information input circuit 20 is provided corresponding to the protection device 70 installed in each of the three compressors. As shown in FIG. 2, the protective device 70 includes a high-pressure switch 71 that operates when the refrigerant pressure by the compressor function exceeds the upper limit value, and the refrigerant pressure drops below the lower limit value. A low-pressure pressure switch 72 that operates and a winding temperature thermoswitch 73 that operates when the temperature of the winding inside the compressor becomes an abnormal temperature.

  As shown in the figure, the protection information input circuit 20 includes protection information input relays 21, 22, and 23 provided corresponding to the switches 71, 72, and 73 of the protection device 70, and the protection information input circuit 20. And a manual protection information aggregating relay 24 that cuts off power to the compressor drive contactor when any one of the relays 21, 22, and 23 is excited. In the protection information input relays 21, 22 and 23, each b contact is connected in series to the input side of the manual protection information aggregation relay 24, and each a contact is a protection information notification line of the air conditioning controller 40. 41 is connected. The manual protection information aggregation relay 24 has a contact a inserted in the manual operation control line 12 on the input side of the compressor drive contactor.

  As shown in FIG. 3, the manual operation circuit 30 includes three protection information input circuits 20 connected to the automatic / manual changeover switch 10 via the manual operation control line 12, and a room connected to the manual operation control line 12. A fan / outdoor fan start delay timer 31, first, second and third compressor start delay timers 32, 33, 34 connected in parallel to the indoor fan / outdoor fan start delay timer 31, and an indoor fan / outdoor An indoor fan drive contactor 35 and an outdoor fan drive contactor 36 connected to the manual operation control line 12 through respective contacts of the fan activation delay timer 31 are provided. As described above, the three protection information input circuits 20 are connected to the protection devices 70 installed on the compressors on the input side, and connected to the air conditioning controller 40 on the output side via the protection information notification lines 41, respectively. Has been. The left protection information input circuit 20 of the three protection information input circuits 20 is connected to the first compressor driving contactor 1 via the contact of the first compressor start delay timer 32, and the central protection information input circuit 20 is connected. The input circuit 20 is connected to the second compressor drive contactor 2 via the contact of the second compressor start delay timer 33, and the protection information input circuit 20 on the right side is connected to the third compressor start delay timer 34. To the third compressor driving contactor 3.

  As shown in FIGS. 1 and 3, the air conditioning controller 40 has an input side connected to the automatic / manual changeover switch 10 via an automatic operation control line 11, and an output side connected to the indoor fan and outdoor fan driving contactors 35, 36. And the first, second, and third compressor driving contactors 1, 2, and 3, respectively. The three protection information input circuits 20 are connected to each other via a protection information notification line 41 and are connected to a backup air conditioning controller 50 via an abnormality notification line 42.

  The air conditioning controller 40 controls the operation of the air conditioner based on a preset control program when the automatic operation by the switching operation of the automatic / manual switch 10 is confirmed through the automatic operation control line 11. First, the indoor fan driving contactor 35 and the outdoor fan driving contactor 36 provided in the manual operation circuit 30 are energized to apply power to the indoor fan and outdoor fan, and then the first compressor driving contact. The power is applied to the three compressors by energizing the compressor 1, the second compressor driving contactor 2, and the third compressor driving contactor 3. When the operation of the protection device 70 provided in each compressor is monitored through the three protection information input circuits 30 and the operation of any of the protection devices 70 is confirmed, the operation of the corresponding compressor is controlled by a contactor ( Any one of the first, second, and third compressor driving contactors 1, 2, and 3) is stopped. When the air conditioning controller 40 confirms that there is an abnormality, the air conditioning controller 40 notifies the backup air conditioning controller 50 via the abnormality notification line 42.

  The backup air conditioning controller 50 described above is connected to the manual operation circuit 30 via the manual operation control line 12 and connected to the backup circuit 60 via the backup control line 51 and receives an abnormality notification from the air conditioning controller 40. Then, a control power supply is applied to the manual operation circuit 30 via the manual operation control line 12 to operate the air conditioner instead of the air conditioning controller 40. The backup circuit 60 includes first, second, and third compressor control relays 61, 62, and 63 for operating or stopping the compressors based on the control from the backup air conditioning controller 50, respectively. The b contacts of the first, second, and third compressor control relays 61, 62, 63 are respectively inserted into the manual operation control lines 12 connected to the protection information input circuit 20.

Next, the operation of the air conditioning control device according to Embodiment 1 will be described.
When an automatic control power is applied to the air conditioning controller 40 via the automatic / manual switch 10, the air conditioning controller 40 first includes an indoor fan drive contactor 35 provided in the manual operation circuit 30 and an outdoor unit. The fan drive contactor 36 is energized to apply power to the indoor fan and outdoor fan, and then the first compressor drive contactor 1, the second compressor drive contactor 2, and the third compressor drive. The contactor 3 is energized, power is applied to the three compressors, and the operation of the air conditioner is started. Then, the operation of the protection device 70 provided in each compressor is monitored through the three protection information input circuits 30.

  For example, when the high pressure switch 71 of the protection device 70 provided in the first compressor is activated during the operation of the air conditioner, the protection information input relay 21 of the protection information input circuit 20 is excited, and b The contact a is turned off and the contact a is turned on. The operation of the compressor by manual operation is blocked by turning off the b contact, and the air conditioning controller 40 is notified that the high pressure switch 71 of the protective device 70 has been actuated by turning on the a contact. On the other hand, when confirming the notification, the air conditioning controller 40 stops energization of the first compressor driving contactor 1 in order to stop the operation of the first compressor.

  When manual operation is selected by the switching operation of the automatic / manual changeover switch 10, manual control power is applied to each protection information input circuit 20 of the manual operation circuit 30 via each contact b of the backup circuit 60. The manual control power is applied to the indoor / outdoor fan activation delay timer 31 and the first, second and third compressor activation delay timers 32, 33, 34 of the manual operation circuit 30. At this time, each of the timers 31, 32, 33, and 34 starts counting time, and when the preset time is reached, the respective a contacts are turned off. In this case, first, the indoor fan driving contactor 35 and the outdoor fan driving contactor 36 are excited to start the operation of the indoor fan and the outdoor fan, and then the first compressor driving contactor 1 and the second compressor driving contactor 1, 2. The compressor driving contactor 2 and the third compressor driving contactor 3 are excited, and the three compressors start operation.

  If the high pressure switch 71 of the protective device 70 provided in the first compressor is activated during the operation of the air conditioner by the manual operation circuit 30, the protection information input circuit 20 uses the protection information input circuit 20. When the relay 21 is excited, the a contact is turned on and the b contact is turned off. At this time, the energization of the protection information aggregating relay 24 is cut off and its contact a is turned off, and the energization of the first compressor driving contactor 1 on the output side is cut off, so that the first compressor Stop operation.

  Further, when the air conditioning controller 40 confirms that there is an abnormality during the automatic operation by the air conditioning controller 40, the backup air conditioning controller 50 is notified accordingly. On the other hand, when the backup air-conditioning controller 50 detects an abnormality notification from the air-conditioning controller 40, the backup air-conditioning controller 50 applies manual control power to the manual operation circuit 30 via the manual operation control line 12, thereby The start delay timer 31 and the first, second, and third compressor start delay timers 32, 33, and 34 are operated, and first, as in manual operation, first, the indoor fan drive contactor 35 and the outdoor fan drive contact The operation of the indoor fan and the outdoor fan is resumed through the compressor 36, and then the three compressors are driven through the first compressor driving contactor 1, the second compressor driving contactor 2, and the third compressor driving contactor 3. Restart the machine.

  When the backup air-conditioning controller 50 energizes and energizes the first, second and third compressor control relays 61, 62, 63 of the backup circuit 60 during the operation of the three compressors, for example, The b contacts of the relays 61, 62, and 63 are turned off, and the manual control power supply from the backup air conditioning controller 50 is shut off. At this time, the first, second, and third compressor driving contactors 1, 2, and 3 on the output side of each protection information input circuit 20 are turned off, and the operation of the respective compressors is stopped.

  As described above, according to the first embodiment, when the backup air-conditioning controller 50 controls the air conditioner through the manual operation circuit 30, if any of the plurality of protective devices 70 is activated, the protection information is input. Since the circuit 20 invalidates the operation of the compressor by the manual operation circuit 30, the backup air conditioning controller 50 does not need to perform the backup operation while monitoring the state of the protective device 70, and the control software is simplified. There is an effect that can be done.

Embodiment 2. FIG.
FIG. 4 is a circuit diagram of an air-conditioning control apparatus showing Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the same or equivalent part as Embodiment 1 demonstrated in FIG. 1, and description is abbreviate | omitted.
In the second embodiment, for example, when the air conditioning controller 40a of the air conditioning control device 80a causes an abnormality when the first and second air conditioning control devices 80a and 80b are automatically operating the air conditioner, The air conditioning controller 40b of the air conditioning controller 80b performs backup control in place of the air conditioning controller 40a in which an abnormality has occurred.

  The air conditioning controller 40a and the air conditioning controller 40b are connected to each other via the first abnormality notification line 42a and the second abnormality notification line 42b. Further, when the air conditioning controller 40a detects an abnormality of the air conditioning controller 40b via the second abnormality notification line 42b, the air conditioning controller 40a manually operates via the first separation circuit 90a → the manual operation control line 12 → the second separation circuit 90b. When the control power for manual operation is supplied to the circuit 30 to perform the backup operation and the compressor (three units) on the second air conditioning control device 80b side is operated or stopped, the first control line 51a is used for the second operation. 2 Control relays 61, 62, 63 (see FIG. 1) of the backup circuit 60 on the air conditioning control device 80b side are controlled. When the air conditioner controller 40b detects an abnormality in the air conditioner controller 40a via the first abnormality notification line 42a, the air conditioner controller 40b manually operates via the second separation circuit 90a → the manual operation control line 12 → the first separation circuit 90a. When the control power for manual operation is supplied to the circuit 30 to perform the backup operation and the compressor (three units) on the first air-conditioning control device 80a side is operated or stopped, the second control line 51b is used for the second operation. 1 Control relays 61, 62, 63 (see FIG. 1) of the backup circuit 60 on the air conditioning control device 80a side are controlled.

  The first sorting circuit 90a and the second sorting circuit 90b described above are each supplied to the manual operation circuit 30 when a manual control power source by switching of the automatic / manual switch 10 is input. Although not shown in FIG. 4, each manual operation circuit 30 is provided with three protection information input circuits 20 provided corresponding to the protection devices 70 of the three compressors. The three protection information input circuits 20 are arranged on the first classification circuit 90a side (second classification circuit 90b side) via respective b contacts of control relays 61, 62, 63 provided on the backup circuit 60 on the input side. Each output side is connected to the air conditioning controller 40a (air conditioning controller 40b) via the protection information notification line 41, and the first, second and second are connected via the a contacts of the delay timers 32, 33, 34. The third compressor driving contactors 1, 2, and 3 are connected to each other.

Next, the operation of the second embodiment will be described. The operation of the first air conditioning control device 80a and the second air conditioning control device during the automatic operation and the manual operation, and the operation when the protective device is activated during the automatic operation and the manual operation are the same as in the first embodiment. Since it is the same, it is omitted.
When the air conditioning controller 40a of the first air conditioning controller 80a and the air conditioning controller 40b of the second air conditioning controller 80b are each automatically operating the air conditioner, for example, the air conditioning control of the first air conditioning controller 80a. When the device 40a detects that an abnormality has occurred, the operation of the indoor fan and the outdoor fan is stopped, the operation of the three compressors is stopped, and the abnormality is detected via the first abnormality notification line 42a. To the air conditioning controller 40b of the second air conditioning controller 80b.

  On the other hand, when the air-conditioning controller 40b detects the input of the abnormality notification, the control power supply for manual is supplied via the second separation circuit 90b → the manual operation control line 12 → the first separation circuit 90a of the first air-conditioning control device 80a. The manual operation circuit 30 is supplied, and the indoor fan / outdoor fan start delay timer 31 and the first, second and third compressor start delay timers 32, 33 and 34 are operated to start counting time. At this time, the manual control power supply is supplied to each protection information input circuit 20 of the manual operation circuit 30 via each b contact of the control relays 61, 62, 63 provided in the backup circuit 60 of the first air conditioning control device 80a. To be applied.

  When each timer 31, 32, 33, 34 counts up to the set time, the internal a contact is turned off. In this case, first, the indoor fan driving contactor 35 and the outdoor fan driving contactor 36 are excited to start the indoor fan and the outdoor fan again, and then each protection information input circuit 20 of the manual operation circuit 30 is started. The first compressor driving contactor 1, the second compressor driving contactor 2 and the third compressor driving contactor 3 are respectively excited by the manual control power source applied to the three compressors. Start driving again.

  When the first air conditioning controller 80a manually operates the air conditioner by the backup operation of the air conditioner controller 40b, the protection device 70 for the first compressor among the three compressors of the air conditioner, For example, when the high pressure switch 71 is activated, the protection information input circuit that monitors the first compressor among the three protection information input circuits 20 provided in the manual operation circuit 30 of the first air conditioning control device 80a. 20 shuts off the control power for manual operation, puts the corresponding first compressor driving contactor 1 into a non-excited state, and stops the operation of the first compressor.

  Further, when the first air conditioning controller 80a manually operates the air conditioner by the backup operation of the air conditioning controller 40b, the air conditioning controller 40b is connected to the first air conditioning controller 80a side via the second backup control line 51b. When manual control power is supplied to the backup circuit 60, the first, second and third compressor control relays 61, 62 and 63 of the backup circuit 60 are excited. At this time, the b contacts of the relays 61, 62, 63 are turned off, the manual control power input to the three protection information input circuits 20 is shut off, and the three compressors in backup operation are compressed. Stop the machine.

  Although the description has been given here of stopping three compressors, it is also possible to stop one or two compressors. When the air conditioner is stopped, the manual control power supplied to the manual operation circuit 30 of the first air conditioning control device 80a is shut off via the manual operation control line 12, and the second backup control line 51b. This can be achieved by supplying manual control power to the backup circuit 60 via

  As described above, according to the second embodiment, when the abnormality information is received, the air conditioner is controlled through the abnormal-side manual operation circuit 30 instead of the air conditioning controller that has notified the abnormality information. When any of the protection devices 70 is activated, the protection information input circuit 20 invalidates the operation of the compressor by the manual operation circuit 30, so that the air conditioning control device 40a or 40b that has received the notification of the abnormality information is protected. It is not necessary to perform a backup operation while monitoring the state of the device 70, and the control software can be simplified. In addition, since a means for notifying the monitoring state of the protective device 70 is not required, the wiring between the first and second air conditioning control devices 80a and 80b can be reduced.

  As an application example of the present invention, there is a railway vehicle air conditioning system. The air conditioning system of a railway vehicle is highly public, and when there is an air conditioner with two built-in air conditioners, the air conditioner of one of the air conditioners becomes abnormal. If the system is stopped, the deterioration of the air conditioning service becomes a big problem. Therefore, if one of the air conditioning controllers becomes abnormal and the other air conditioning controller is healthy, the sound side performs a backup operation of the abnormal side, and an air conditioning operation that is not different from the normal time is performed. However, in a railway vehicle, it is also necessary to reduce wiring as much as possible due to vehicle restrictions. Under the circumstances as described above, the present invention can operate the air conditioner on the abnormal side while performing the operation of the protective device effectively without performing wiring for mutually monitoring the protective device of the compressor. It is optimal as a backup operation for an air conditioning system for railway vehicles.

It is a circuit diagram of the air-conditioning control apparatus which shows Embodiment 1 of this invention. It is a circuit diagram which shows the protection information input circuit of an air-conditioning control apparatus. It is a circuit diagram which shows the manual operation circuit of an air-conditioning control apparatus. It is a circuit diagram of the air-conditioning control apparatus which shows Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Contactor for 1st compressor drive, 2 Contactor for 2nd compressor drive, 3 Contactor for 32nd compressor drive, 10 Automatic / manual changeover switch, 11 Automatic operation control line, 12 Manual operation control line, 20 Protection information input / output circuit, 30 Manual operation circuit, 40, 40a, 40b Air conditioning controller, 41 Protection information notification line, 42 Abnormality notification line, 42a First abnormality notification line, 42b Second abnormality notification line, 50 Backup air conditioning control , 60 backup circuit, 70 protective device, 80a first air conditioning control device, 80b second air conditioning control device, 90a first sorting circuit, 90b second sorting circuit.

Claims (2)

A manual operation circuit for operating the air conditioner based on a sequence set in advance during manual operation;
A plurality of protective devices provided for protecting the compressor of the air conditioner;
A protection information input circuit that outputs the information when detecting any operation of the protection device and invalidates the operation of the compressor by the manual operation circuit;
An air conditioning controller that automatically controls the air conditioner during automatic operation and stops the operation of the compressor when detecting information from the protection information input circuit;
With a backup air conditioning controller,
The air conditioning controller notifies the backup air conditioning controller of abnormality information when it detects an abnormality on its own,
The backup air conditioning controller controls the air conditioner through the manual operation circuit when receiving a notification of abnormality information. A manual operation circuit for operating the air conditioner based on a sequence set in advance during manual operation;
A plurality of protective devices provided for protecting the compressor of the air conditioner;
A protection information input circuit that outputs the information when detecting any operation of the protection device, and invalidates the operation of the compressor by the manual operation circuit;
The air conditioner is automatically controlled at the time of automatic operation, and when the information from the protection information input circuit is detected, each of the plurality of air conditioners includes an air conditioning controller that stops the operation of the compressor.
Each air conditioning controller provided in multiple air conditioners notifies the abnormality information when it detects an abnormality on its own, and when it receives notification of the abnormality information, it replaces the air conditioning controller that notified the abnormality information, An air conditioning control device that controls an air conditioner through a manual operation circuit on an abnormal side.

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