JP6072652B2 - Railway vehicle air conditioner and wireless communication device - Google Patents

Description

  The present invention relates to a railway vehicle air conditioner mounted on a railway vehicle, and a wireless communication device used in the railway vehicle air conditioner.

  As an air conditioner that adjusts the temperature in the passenger compartment of a railway vehicle, the operation of the air conditioner that could only be performed in a specific place such as a train cab or a conductor's cabin is performed with a mobile terminal that has a wireless communication function. There is something that can be done (see Patent Document 1). By applying the air conditioner described in Patent Document 1, the conductor can change the settings of the air conditioner on a portable terminal, and can quickly deal with complaints and requests from passengers regarding air conditioning. it can.

JP 2005-112225 A

  The air conditioner described in Patent Document 1 uses wireless communication between an operation panel (portable terminal) for setting the air conditioner and the air conditioner main body, and constitutes the air conditioner. A configuration is also possible in which communication between various devices is performed wirelessly and wiring between the devices is not required. In that case, since the operation of the device may adversely affect the wireless communication, it is desirable that the wireless device that realizes wireless communication between the devices be configured so as to avoid deterioration of the wireless communication quality.

  The present invention has been made in view of the above, and is formed by a plurality of devices having a wireless communication function, and is good even when a plurality of devices include devices that affect wireless communication. It aims at obtaining the rail vehicle air conditioner which can implement | achieve radio | wireless communication between apparatuses.

  In order to solve the above-described problems and achieve the object, the present invention is an air conditioner for a railway vehicle formed by a plurality of types of devices equipped with a wireless device, and the wireless device is connected to an opposing device. A communication quality prediction means for predicting the future communication quality based on the communication quality measurement result of the communication means, and a transmission means for transmitting a signal to the opposite device at a timing at which a good communication quality is predicted. To do.

  Advantageous Effects of Invention According to the present invention, there is an effect that the quality of wireless communication performed between devices can be improved in a railway vehicle air conditioner formed by a plurality of types of devices equipped with wireless devices.

FIG. 1 is a diagram illustrating an arrangement example of an air conditioner for a railway vehicle. FIG. 2 is a diagram illustrating a configuration example of the railway vehicle air conditioner according to the first embodiment. FIG. 3 is a diagram illustrating an arrangement example of the wireless devices constituting the railway vehicle air conditioner. FIG. 4 is an external view of the railway vehicle air conditioner as viewed from above. FIG. 5 is a diagram showing the installation location of the wireless device in the railway vehicle air conditioner. FIG. 6 is a diagram illustrating a result of measuring the received power with the outdoor fan rotated. FIG. 7 is a diagram showing a result of observing a radio spectrum in the vicinity of an outdoor fan. FIG. 8 is a diagram showing an outline of wireless communication. FIG. 9 is a diagram illustrating a configuration example of the radio apparatus according to the first embodiment. FIG. 10 is a diagram for explaining the operation of the transmission timing control unit of the wireless device. FIG. 11 is a flowchart illustrating an operation example of the radio apparatus according to the first embodiment. FIG. 12 is a diagram illustrating a configuration example of a radio apparatus according to the second embodiment. FIG. 13 is a flowchart illustrating an operation example of the radio apparatus according to the second embodiment. FIG. 14 is a diagram illustrating the received power fluctuation period and the received power prediction parameter table. FIG. 15 is a diagram for explaining a received power prediction method. FIG. 16 is a diagram illustrating an outline of wireless communication according to the third embodiment.

  Hereinafter, embodiments of a railway vehicle air conditioner and a wireless communication device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating an arrangement example of an air conditioner for a railway vehicle. Rail vehicle air conditioners are generally arranged as shown in FIG. 1 (a) or (b). The arrangement shown in FIG. 1A is an integrated type in which a railcar air conditioner 2 is installed on the roof of the railcar 1. The railway vehicle air conditioner 2 includes, for example, a compressor, an indoor blower, an outdoor blower, a heat exchanger, an air conditioning control device, and the like as main devices. Moreover, the arrangement shown in FIG. 1B is often employed when a heavy object cannot be installed on the roof. This arrangement separates the railcar air conditioner, installs some of the main equipment (equipment block 4) under the railcar floor, and installs the rest of the main equipment (equipment block 3) on the railcar roof or in the car. It is a separated type. Even when any of the arrangements (a) and (b) is adopted, the types of devices constituting the railway vehicle air conditioner and the connection relationship between the devices are the same. Therefore, in the following, description will be given by taking the integrated railway vehicle air conditioner shown in (a) as an example.

  FIG. 2 is a diagram illustrating a configuration example of the railway vehicle air conditioner according to the first embodiment. As shown in FIG. 2, the railway vehicle air conditioner 2 includes a radio operation terminal 10, a radio temperature sensor 11, a radio humidity sensor 12, a radio door open / close sensor 13, a radio load sensor 14, an air conditioning control device 15, an indoor blower. 17, an outdoor blower 18 and a compressor 19 are included. Other sensors may be included. Sensors (such as a wireless door open / close sensor) that are not directly required for environmental adjustment in the cabin, such as temperature and humidity, may be omitted. The air conditioning control device 15 communicates with other devices via the wireless line 20 or 21.

  The wireless operation terminal 10 receives an air conditioning on / off or temperature setting operation from a conductor or the like, and notifies the air conditioning control device 15 of the received operation content. The wireless temperature sensor 11 measures the indoor or outdoor temperature and notifies the air conditioning control device 15 of the measurement result. The wireless humidity sensor 12 measures indoor humidity and notifies the air conditioning controller 15 of the measurement result. The wireless door opening / closing sensor 13 measures the opening / closing of the door and notifies the air conditioning control device 15 of the measurement result. The wireless load sensor 14 measures the load of the railway vehicle 1 and notifies the air conditioning control device 15 of the measurement result. Although not shown, the wireless operation terminal 10 and each sensor have a wireless communication function (wireless device).

  The air conditioning control device 15 includes a wireless device 16 and receives information from the wireless operation terminal 10 and each sensor via the wireless line 20. Moreover, the control signal with respect to the indoor air blower 17, the outdoor air blower 18, and the compressor 19 is transmitted via the radio | wireless line 21. FIG. For example, the indoor blower 17 and the like are controlled so that the temperature and humidity in the passenger room have desired values. The indoor blower 17, the outdoor blower 18, and the compressor 19 perform an operation according to the control signal received from the air conditioning control device 15 to adjust the temperature in the cabin.

  FIG. 3 is a diagram illustrating an arrangement example of wireless devices (wireless devices provided in the wireless temperature sensor 11, the indoor blower 17, and the like) constituting the railway vehicle air conditioner 2. The radio device of the radio operation terminal 10, the radio temperature sensor 11, the radio humidity sensor 12, the radio door open / close sensor 13 and the radio load sensor 14, or the radio device of the indoor blower 17, the outdoor blower 18 and the compressor 19 is the railway vehicle 1. Indoors (wireless device 5), in railway vehicle air conditioner 2 (wireless device 6) or outdoors (wireless device 7).

  FIG. 4 is an external view when the railway vehicle air conditioner 2 is viewed from above. The railway vehicle air conditioner 2 includes an indoor device 35 and an outdoor device 41. The indoor side device 35 includes indoor heat exchangers 30 and 34 for cooling the air, indoor fans 31 and 33 (corresponding to the indoor blower 17 shown in FIG. 2) for sending the cooled air indoors, and the indoor fans 31 and 33. It is comprised with the motor 32 for an indoor fan to rotate. The outdoor-side device 41 includes compressors 36 and 39 (which correspond to the compressor 19 shown in FIG. 2) that compress the refrigerant, outdoor heat exchangers 38 and 40 that cool the refrigerant, and outdoor heat exchangers 38 and 40. It is comprised with the outdoor fan 37 (equivalent to the outdoor air blower 18 shown in FIG. 2) which sends a wind to.

  FIG. 5 is a diagram showing the installation location of the wireless device in the railway vehicle air conditioner 2. When the wireless device is mounted in the railway vehicle air conditioner 2 like the wireless device 6 shown in FIG. 3, the outdoor side device 41 has complicated exhaust ducts and refrigerant pipes. The route becomes complicated and the characteristics deteriorate. Further, rotation of the outdoor fan 37 causes periodic fluctuations and further deteriorates the characteristics. On the other hand, the indoor device 35 has many gaps, is not easily affected by the outdoor fan 37, can obtain good received power, and can communicate with a low error rate.

  For the above verification, as a result of measuring the received power directly under the railroad vehicle air conditioner with the wireless device installed at the positions <1> to <3> shown in FIG. 5, the position <1> is the most characteristic. There is a difference of 16 dB from the position <3> with the best characteristics, and the validity of the installation at the position <1> has been confirmed. 6 shows that the wireless device is installed at the position <3> in FIG. 5 and the outdoor fan 37 is rotated, and the received power (position <3>) is 1 m lateral to the railcar air conditioner 2. The result of measuring the received power of the signal transmitted by the wireless device is shown. FIG. 6 is a waveform of received power when the horizontal axis is time, the vertical axis is received power, and the wireless device is transmitting at regular intervals. The received power fluctuates periodically as the outdoor fan 37 rotates. Further, FIG. 7 shows a result of observing a wireless spectrum in the vicinity of the outdoor fan 37 with the wireless device installed at the position <3> in FIG. In the vicinity of the outdoor fan 37, the shape of the radio spectrum changes as shown in FIG.

  As described above, when the wireless device 6 installed in the railway vehicle air conditioner 2 is installed in the outdoor device 41, the wireless device 6 is affected by the exhaust duct, the refrigerant pipe, and the outdoor fan 37. In this case, communication is not possible. On the other hand, by installing the wireless device in the indoor device 35 away from the outdoor fan 37, it is possible to communicate well without being affected by the outdoor fan 37 or the like. Therefore, in the railway vehicle air conditioner 2 of the present embodiment, it is necessary to communicate with the air conditioning control device 15 such as the compressors 36 and 39 of the equipment (outdoor device 41) installed outdoors and the outdoor fan 37. A wireless device of a device is installed indoors.

  As described above, the railway vehicle air conditioner according to the present embodiment is configured so that devices that transmit and receive information communicate with each other via a wireless line among the devices forming the device, and each device is wireless. Since the wireless device that realizes communication is installed indoors, it is possible to prevent the wireless communication quality in the device from being deteriorated by the influence of an outdoor fan or the like.

  However, it may be difficult to install the wireless device indoors for reasons such as device configuration and restrictions. Therefore, means for avoiding deterioration of communication quality when the wireless device is installed outdoors will be described below.

  FIG. 8 is a diagram showing an outline of wireless communication. Hereinafter, a communication method capable of avoiding the influence of the outdoor fan 37 when a wireless device is installed in the outdoor side device 41 (see FIG. 4) in the railway vehicle air conditioner 2 will be described. The wireless device 52 illustrated in FIG. 8 is a wireless device installed in the outdoor device 41. The wireless device 16 and the wireless device 52 communicate via the wireless line 51.

  Since the influence on the wireless communication due to the rotation of the outdoor fan 37 periodically varies (see FIG. 6), the wireless device 16 and the wireless device 52 can predict the timing at which the reception power increases. That is, each wireless device can grasp the fluctuation cycle of the received power by monitoring the received power from the opposite device (radio device of the communication partner) over a certain period, and can predict the timing when the received power becomes high. . At the timing when the reception power from the opposite device becomes high, stable communication is possible even when transmitting from the wireless device. Therefore, for example, the wireless device 52 installed outside the railway vehicle air conditioner 2 periodically transmits a received power measurement signal, and the wireless device 16 measures the received power over a certain period of time, and the measurement result (for example, , Received power and measurement execution time). Since the wireless device 16 stores the periodic fluctuation of the received power due to the influence of the rotation of the outdoor fan 37, the current received power can be predicted from the previously detected received power. The wireless device 16 communicates while avoiding the influence of outdoor fan rotation by delaying transmission for a period until the predicted received power exceeds the threshold value. That is, transmission is performed in a period in which the predicted received power value exceeds the threshold value. Although the case where the wireless device 16 predicts the received power has been described, the wireless device 52 can similarly predict the received power.

  FIG. 9 is a diagram illustrating a configuration example of the wireless device (wireless communication device) of the present embodiment, and illustrates a configuration example of the wireless device 16 as an example. The configuration of other wireless devices is the same. The wireless device 16 includes, as main components, a reception unit 60 that receives and demodulates a radio signal, a transmission unit 61 that modulates and transmits the signal, and a transmission timing control unit 65. Further, the transmission timing control unit 65 predicts the reception power (communication quality) at the time of transmission based on the reception power measurement unit 62 that calculates the power of the radio signal received by the reception unit 60 and the past reception power measurement result. A reception power prediction unit 63 and a transmission timing delay control unit 64 that delays transmission are provided.

  Next, the operation of the radio apparatus according to this embodiment will be described. As an example, an operation when the wireless device 16 communicates with the wireless device 52 (transmits a signal to the wireless device 52) will be described.

  FIG. 10 is a diagram for explaining the operation of the transmission timing control unit 65 of the wireless device 16, in which the horizontal axis represents time and the vertical axis represents the received power value. The radio signal transmitted by the radio device 52 is demodulated by the receiving unit 60 and then input to the transmission timing control unit 65. In the transmission timing control unit 65, the reception power measurement unit 62 calculates reception power. The calculated received power is, for example, like a black circle shown in FIG. 10 (received power measurement value 80). Since the fluctuation due to the rotation of the outdoor fan 37 is periodic, the received power prediction unit 63 predicts the fluctuation of the received power as indicated by a solid line from the detected received power based on the past received power measurement results (received power). Predicted value 81). The reception power predicting unit 63 holds the reception result of the signal (reception power measurement signal) periodically transmitted by the wireless device 52 while the outdoor fan 37 is operated as the past reception power measurement result. It shall be. The transmission timing delay control unit 64 receives the prediction result (reception power prediction value 81) from the reception power prediction unit 63, and permits transmission to the transmission unit 61 during the period when the reception power prediction value 81 exceeds the threshold value 82. Otherwise, the transmission unit 61 is notified of the transmission prohibition. For example, when the current time is A shown in FIG. 10, the predicted received power value 81 is equal to or less than the threshold value, so that it waits for the elapse of time t and becomes the time B when the predicted received power value 81 reaches the threshold value. At this point, the transmission unit 61 is notified of transmission permission (notifies that the transmission permission period has been reached). The transmission unit 61 transmits a signal generated by a transmission signal generation unit (not shown) in a state where transmission permission is notified from the transmission timing delay control unit 64 (transmission permission period).

  FIG. 11 is a flowchart illustrating an operation example of the wireless device. The detailed operation of the wireless device will be described with reference to FIG. 9, FIG. 10, and FIG.

  In the wireless device 16 illustrated in FIG. 9, first, the received power measurement unit 62 measures the received power of a signal (received power measurement signal) transmitted by the wireless device 52 that is the opposite device (step S11). Next, the presence / absence of data to be transmitted is confirmed (step S12). For example, the reception power measurement unit 62 inquires of the transmission signal generation unit (not shown) whether there is transmission data. When there is no data to transmit (step S12: No), it returns to step S11 and measures received power again. On the other hand, when there is data to be transmitted (step S12: Yes), the reception power prediction unit 63 receives the data based on the measurement result (reception power measurement value) in step S11 and the past reception power measurement result. A predicted power value (received power predicted value 81 shown in FIG. 10) is calculated (step S13). Next, the transmission timing delay control unit 64 compares the received power predicted value calculated by the received power prediction unit 63 with a threshold value (step S14), and if smaller than the threshold value (step S14: No), transmission is performed. The waiting time, that is, the time required until the predicted received power value becomes larger than the threshold value is calculated (step S15). Then, the transmission unit 61 is notified to wait for the transmission until the transmission waiting time elapses, and the transmission unit 61 transmits the data after waiting for the transmission waiting time to elapse (steps S16 and S17). On the other hand, when it is determined in step S14 that the predicted received power value is larger than the threshold value (step S14: Yes), the transmission timing delay control unit 64 notifies the transmission unit 61 of transmission permission and performs transmission. The unit 61 transmits data (step S17).

  The predicted received power value in step S13 may be calculated only when the received power measured in step S11 is lower than the threshold value, that is, when it is necessary to wait for transmission until the communication quality is good. Good (when the current received power is larger than the threshold value, the predicted received power is not calculated). In this case, the amount of calculation for calculating the received power prediction value can be reduced.

  In the present embodiment, the operation when the wireless device 16 of the air conditioning control device 15 transmits a signal to the wireless device 52 installed outside the railway vehicle air conditioner 2 has been described. The operation when transmitting a signal from the device 52 to the wireless device 16 is the same.

  Moreover, although the case where the influence of the outdoor fan 37 is avoided has been described in the present embodiment, it goes without saying that the present invention can also be used to avoid the influence (periodically varying influence) of other metal rotating objects. .

  As described above, in the railway vehicle air conditioner of the present embodiment, the wireless device that realizes wireless communication between devices is based on the measurement result (current and past measurement results) of the received power of the signal transmitted by the opposite device. If the future received power is estimated and good communication is not possible at this time, the waiting time until the good communication is possible is calculated based on the estimated result of the future received power. Communication was made after waiting until communication was estimated to be possible. Thereby, it is possible to perform communication at a timing when the communication condition is favorable under a situation in which the communication environment fluctuates periodically, such as being affected by the rotation of the outdoor fan.

  In this embodiment, whether or not good communication is possible is estimated using the measurement result of received power, but is estimated using communication quality (past communication quality) indicated by an error rate or the like. You may do it.

  Also, in this embodiment, when the wireless device installed in the outdoor side device cannot perform good communication when transmission data occurs, it calculates the waiting time until good communication is possible. Thus, the wireless device installed in the indoor device may perform the same operation, although it waits until it is estimated that good communication is possible.

Embodiment 2. FIG.
In the first embodiment described above, when a radio apparatus is mounted in the railway vehicle air conditioner 2, in order to avoid the influence of the outdoor fan 37 and the like, the predicted received power value 81 is calculated, and the transmission is delayed and transmitted. Although this is the case, in the present embodiment, the fluctuation of the received power is further predicted in consideration of the rotation speed (operation state) of the outdoor fan 37. By calculating the received power prediction value 81 in consideration of the operation state of the outdoor fan 37, a more accurate prediction result can be obtained than when prediction is made from received power alone. The overall configuration of the apparatus is the same as that of the first embodiment (see FIG. 2 and the like).

  FIG. 12 is a diagram illustrating a configuration example of a radio apparatus according to the second embodiment. As an example, a wireless device of the air conditioning control device 15 is shown. The radio apparatus 16a of the present embodiment is obtained by replacing the transmission timing control unit 65 of the radio apparatus 16 (see FIG. 9) of the first embodiment with a transmission timing control unit 65a. The transmission timing control unit 65a replaces the reception power prediction unit 63 of the transmission timing control unit 65 described in Embodiment 1 with a reception power prediction unit 63a, and further includes a reception power fluctuation period calculation unit 67. is there. Since other components are the same as those of the wireless device 16 of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The reception power fluctuation period calculation unit 67 of the wireless device 16a acquires the rotational speed information (outdoor fan rotational speed information 68) from the outdoor blower 18 by wired or wireless communication, and based on the acquired outdoor fan rotational speed information 68, Calculate the period of received power fluctuation. The reception power prediction unit 63a calculates the reception power prediction value 81 shown in FIG. 10 based on the reception power fluctuation period calculated by the reception power fluctuation period calculation unit 67 and the past reception power measurement results.

  FIG. 13 is a flowchart illustrating an operation example of the radio apparatus according to the second embodiment. The flowchart shown in FIG. 13 is obtained by replacing step S13 in the flowchart (FIG. 11) showing the operation example of the wireless apparatus according to the first embodiment with step S13a, and further adding steps S21 and S22. Since the processes with the same step numbers as in FIG. 11 are the same as those in the first embodiment, description thereof is omitted.

  In the wireless apparatus having the configuration shown in FIG. 12, when step S11 is completed, the received power fluctuation period calculation unit 67 acquires outdoor fan rotation speed information 68, which is rotation speed information, from the outdoor fan 37 (step S21). . If there is data to be transmitted (step S12: Yes), the received power fluctuation period calculating unit 67 calculates the period of the received power fluctuation from the rotational speed of the outdoor fan 37 acquired in step S21 (step S22). Next, the reception power predicting unit 63a receives the reception result based on the measurement result (reception power measurement value) in step S11, the past reception power measurement result, and the calculation result (reception power fluctuation period) in step S22. The predicted power value 81 is calculated (step S13a).

  Here, a method of calculating the period of the received power fluctuation from the rotational speed of the outdoor fan 37 in step S22 will be described. The relationship between the rotation speed of the outdoor fan 37 and the period of fluctuation in received power is measured in advance, for example, when manufacturing the railway vehicle air conditioner 2, and the received power prediction parameter for each rotation speed is obtained as a table from the measurement result. The received power fluctuation period calculation unit 67 or the storage unit (not shown) holds the data (see FIG. 14). The received power prediction parameter is, for example, a parameter calculated by a linear prediction method. Since the rotation speed of the outdoor fan changes with time, the rotation speed of the outdoor fan is monitored for a short time immediately before transmission, and the received power prediction parameter corresponding to the rotation speed is selected from the table. Then, the received power fluctuation period is calculated from the selected received power prediction parameter.

  Moreover, in said step S13a, received power is estimated with the following method, for example. The received power sequence calculated from the period of the received power fluctuation is time series X, the actually measured received power sequence is time series Y, and the newer the measurement time of time series Y, the more weighted, the time series X and The distance of time series Y is obtained. The time series Y is shifted in the time direction, and the distance calculation is repeated a plurality of times. The distance at each shift time is compared, the place where the distance is minimized is found, and the predicted received power value at the transmission time A is calculated from the shift value when the distance is minimized and the cycle of the received power fluctuation ( FIG. 15).

  As described above, in the wireless device according to the present embodiment, the received power prediction is performed based on the received power fluctuation period calculated from the rotation speed information of the outdoor fan 37 in addition to the measurement result of the received power of the signal transmitted by the opposite device. Since the value is calculated, a more accurate received power predicted value can be obtained.

Embodiment 3 FIG.
In the first and second embodiments described above, when a wireless device is mounted in the railway vehicle air conditioner 2, the transmission is delayed to avoid the influence of the outdoor fan 37 and the like. Next, in order to avoid the influence of the outdoor fan 37, a description will be given of an embodiment through another wireless device that is not affected by the outdoor fan 37 by multi-hop. The overall configuration of the apparatus is the same as in the first and second embodiments (see FIG. 2 and the like). The configuration of the wireless device is the same as in Embodiment 1 or 2 (see FIGS. 9 and 12).

  FIG. 16 is a diagram illustrating an outline of wireless communication according to the third embodiment. As in the first and second embodiments, when the period when it is determined that the wireless line 51 cannot communicate stably due to the rotation of the outdoor fan 37 is longer than a certain time, the outdoor fan 37 is not delayed but transmitted by multi-hop. The wireless device 54 relays the communication of the wireless device 16 to the wireless device 52 through the wireless line 55. That is, when the transmission waiting time calculated by the transmission timing delay control unit 64 (required time until the predicted received power value becomes larger than the threshold value) is longer than a certain time, a route with good communication quality (multi-hop route) ) Is present, multi-hop communication is performed. Since the position of the wireless device is fixed, a route (multi-hop route) that is not affected by the outdoor fan 37 can be selected in advance.

  When the transmission waiting time is short and does not cause a problem, transmission is performed in the same manner as in the first and second embodiments.

  Similarly, in the case of transmission from the wireless device 52, when the period (period until stable communication can be performed) determined that communication cannot be performed stably is equal to or longer than a certain time, the wireless circuit 55 performs multihop transmission. The wireless device 54 communicates, and the wireless device 54 relays communication from the wireless device 52 to the wireless device 16 via the wireless line 53.

  As described above, in the wireless device according to the present embodiment, when the transmission delay (transmission waiting time) becomes larger than a certain value, the route is detoured by performing multi-hop communication, so that the transmission delay increases. Thus, it is possible to realize good communication that is not affected by the outdoor fan 37 and the like.

  As described above, the railway vehicle air conditioner and the wireless communication apparatus according to the present invention are suitable for a railway vehicle air conditioner in which devices forming the apparatus perform wireless communication.

  DESCRIPTION OF SYMBOLS 1 Railway vehicle, 2 Railway vehicle air conditioner, 3, 4 Equipment block, 5, 6, 7, 16, 16a, 52, 54 Wireless device, 10 Wireless operation terminal, 11 Wireless temperature sensor, 12 Wireless humidity sensor, 13 Wireless Door open / close sensor, 14 wireless load sensor, 15 air conditioning control device, 17 indoor blower, 18 outdoor blower, 19, 36, 39 compressor, 20, 21, 51, 53, 55 wireless line, 30, 34 indoor heat exchanger, 31, 33 Indoor fan, 32 Indoor fan motor, 35 Indoor side device, 37 Outdoor fan, 38, 40 Outdoor heat exchanger, 41 Outdoor side device, 60 Receiver, 61 Transmitter, 62 Received power measurement unit, 63, 63a reception power prediction unit, 64 transmission timing delay control unit, 65, 65a transmission timing control unit, 67 reception power fluctuation period calculation unit, 68 outdoor Fan speed information, 80 received power measurement value, 81 received power predicted value.

Claims (9)

A railway vehicle air conditioner formed by a plurality of types of devices equipped with wireless devices,
The wireless device includes:
A communication quality prediction means for predicting a future communication quality based on a communication quality measurement result between the opposite device;
Transmitting means for transmitting a signal to the opposite device at a timing when good communication quality is predicted;
An air conditioner for railway vehicles, comprising: The communication quality prediction means predicts the fluctuation period of the influence amount that the communication with the opposite device receives from the operation of another device based on a plurality of communication quality measurement results,
The transmission means, when transmission data is generated at a timing when the influence amount is large, waits until the influence amount becomes small, and then transmits a signal.
The air conditioner for a railway vehicle according to claim 1. When the time from when transmission data is generated at a timing when the influence amount is large until the influence amount becomes small is equal to or greater than a certain value, the transmission means Transmitting a signal to the opposite device via a wireless device capable of communication with a small amount of influence from the operation of the device,
The railway vehicle air conditioner according to claim 2. The air conditioner for a railway vehicle according to claim 2 or 3, wherein the other device is an outdoor fan. A railway vehicle air conditioner formed by a plurality of types of devices equipped with wireless devices,
The wireless device includes:
Communication quality prediction means for predicting future communication quality with the opposite device based on information on the rotational speed of an outdoor fan that is one of the plurality of types of devices,
Transmitting means for transmitting a signal to the opposite device at a timing when good communication quality is predicted;
An air conditioner for railway vehicles, comprising: The communication quality prediction means predicts the fluctuation period of the influence amount that the communication with the opposing device receives from the operation of the outdoor fan,
The transmission means, when transmission data is generated at a timing when the influence amount is large, waits until the influence amount becomes small, and then transmits a signal.
The railway vehicle air conditioner according to claim 5. When the time from when transmission data is generated at a timing when the influence amount is large to when the influence amount becomes small is equal to or greater than a certain value, the transmission unit, among other wireless devices different from the opposing device, Transmitting a signal to the opposite device via a wireless device capable of communication with a small influence amount from the operation of the fan,
The railway vehicle air conditioner according to claim 6. In a railway vehicle air conditioner formed by a plurality of types of devices having a wireless communication function, each of the devices is a wireless communication device that implements the wireless communication function by being mounted on each device,
A communication quality prediction means for predicting a future communication quality based on a communication quality measurement result between the opposite device;
Transmitting means for transmitting a signal to the opposite device at a timing when good communication quality is predicted;
A wireless communication apparatus comprising: In a railway vehicle air conditioner formed by a plurality of types of devices having a wireless communication function, each of the devices is a wireless communication device that implements the wireless communication function by being mounted on each device,
Communication quality prediction means for predicting future communication quality with the opposite device based on information on the rotational speed of an outdoor fan that is one of the plurality of types of devices,
Transmitting means for transmitting a signal to the opposite device at a timing when good communication quality is predicted;
A wireless communication apparatus comprising: