CN214874101U - Communication system and parking air conditioner with same - Google Patents
Communication system and parking air conditioner with same Download PDFInfo
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- CN214874101U CN214874101U CN202022352203.0U CN202022352203U CN214874101U CN 214874101 U CN214874101 U CN 214874101U CN 202022352203 U CN202022352203 U CN 202022352203U CN 214874101 U CN214874101 U CN 214874101U
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Abstract
The utility model discloses a communication system and have its parking air conditioner, this communication system includes: the 485 communication unit and the host and the slave which are communicated with each other through the 485 communication unit, wherein the host sends first data to the slave through the 485 communication unit at intervals of a first preset time; the slave machine receives the first data, delays for a second preset time after the first data are checked, and sends second data to the host machine through the 485 communication unit, wherein the 485 communication unit comprises a shielded twisted pair. The utility model discloses can be applied to the parking air conditioner, adopt two-way 485 communications, promote the reliability of the outdoor unit communication of parking air conditioner under installation and complicated service environment, avoid leading to the parking air conditioner to be absorbed in the abnormal conditions because of communication trouble to the security of parking air conditioner has been improved, in addition, the off-premises station controller can acquire and monitor off-premises station running state through two-way 485 communications, thereby does benefit to and carries out accurate control to the off-premises station.
Description
Technical Field
The utility model belongs to the technical field of the air conditioning technique and specifically relates to a communication system and have its parking air conditioner is related to.
Background
When the parking air conditioner is installed on a truck, for a split type parking air conditioner, the connection distance between an indoor unit and an outdoor unit is long, and vehicle-mounted electrical appliances on the truck are more, and a use environment is more complicated and severe than a household air conditioner, so that communication of indoor and outdoor units of the existing parking air conditioner is unstable, the reliability is poor, and further the parking air conditioner is easily trapped in abnormal conditions due to communication faults, potential safety hazards are brought to the vehicle air conditioner, and the safety is reduced.
In addition, the existing parking air conditioner has no two-way communication between the indoor unit and the outdoor unit, and the indoor unit controller cannot acquire and monitor the running state of the outdoor unit, so that the outdoor unit cannot be accurately controlled.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
Therefore, an object of the utility model is to provide a communication system, this system can be applied to the parking air conditioner, adopts two-way 485 communications, has promoted the reliability of the outdoor machine communication of parking air conditioner under installation and complicated service environment, avoids leading to the parking air conditioner to be absorbed in the abnormal conditions because of communication trouble to the security that has improved the parking air conditioner, in addition, the off-premises station controller can acquire and monitor off-premises station running state through two-way 485 communications, thereby does benefit to and carries out accurate control to the off-premises station.
Therefore, the second objective of the present invention is to provide a parking air conditioner.
In order to achieve the above object, the first aspect of the present invention discloses a communication system, including: the master machine and the slave machine are communicated with each other through the 485 communication unit, wherein the master machine sends first data to the slave machine through the 485 communication unit at intervals of a first preset time; the slave machine receives the first data, delays for a second preset time after the first data passes verification, and sends second data to the host machine through the 485 communication unit, wherein the 485 communication unit comprises a shielded twisted pair.
According to the utility model discloses a communication system can be applied to the parking air conditioner, adopts two-way 485 communications, has promoted the reliability of the outdoor machine communication of parking air conditioner under installation and complicated service environment, avoids leading to the parking air conditioner to be absorbed in the abnormal conditions because of communication trouble to the security of parking air conditioner has been improved, and in addition, the off-premises station controller can acquire and monitor off-premises station running state through two-way 485 communications, thereby does benefit to and carries out accurate control to the off-premises station.
In addition, the communication system of the present invention may further have the following additional technical features:
in some examples, the master machine is an indoor machine controller of a parking air conditioner, and the slave machine is an outdoor machine controller of the parking air conditioner.
In some examples, further comprising: and one end of the power supply wiring terminal is connected with a power supply, the other end of the power supply terminal is respectively connected with power lines of the host and the slave, and the power supply supplies power to the host and the slave through the power supply wiring terminal.
In some examples, the host receives first parity error information and performs a first predetermined error mechanism handling action in response to the first parity error information.
In some examples, the host receives a first communication exception message, and performs an action of resetting the 485 communication unit in response to the first communication exception message until a communication normal message is received or the communication system is powered off.
In some examples, the host receives second communication abnormal information, and executes a fault alarm prompting action in response to the second communication abnormal information until the communication normal information is received.
In some examples, the slave receives second parity error information and performs a second pre-configured error mechanism handling action in response to the second parity error information.
In some examples, the slave receives a third communication abnormal message, and performs an action of resetting the 485 communication unit in response to the third communication abnormal message until a communication normal message is received or the communication system is powered off.
In some examples, the master and the slave are provided with watchdog modules, the master and the slave receive an initialization instruction, respond to the initialization instruction to enable the watchdog modules correspondingly respectively, and receive a dog feeding instruction, respond to the dog feeding instruction to execute a dog feeding action correspondingly respectively so as to avoid resetting of the watchdog modules.
In order to achieve the above object, the second aspect of the present invention discloses a parking air conditioner, comprising: an indoor unit; an outdoor unit; and the communication system of the above first aspect of the present invention.
According to the utility model discloses a parking air conditioner adopts two-way 485 communications, has promoted the reliability of parking air conditioner outdoor unit communication under installation and complicated service environment, avoids leading to the parking air conditioner to be absorbed in the abnormal conditions because of communication trouble to improve the security of parking air conditioner, in addition, the off-premises station controller can acquire and monitor off-premises station running state through two-way 485 communications, thereby does benefit to and carries out accurate control to the off-premises station.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a communication system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the arrangement and connection of the power connection terminal according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
The communication system and the parking air conditioner having the same according to the embodiment of the present invention will be described with reference to fig. 1 to 3.
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system 100 includes: 485 communication unit 110, master 120 and slave 130.
The 485 communication unit 110 is respectively connected to the master 120 and the slave 130, so that the master 120 and the slave 130 communicate with each other through the 485 communication unit 110, thereby realizing the bidirectional communication between the master 120 and the slave 130.
Specifically, the master 120 sends first data to the slave 130 through the 485 communication unit 110 every first preset time; the slave 130 receives the first data, delays for a second preset time after the first data passes the verification, and sends the second data to the host 120 through the 485 communication unit 110, that is, the host 120 and the slave 130 can perform bidirectional communication, thereby realizing bidirectional data transmission. The 485 communication unit 110 includes a shielded twisted pair.
It is understood that the 485 communication unit 110 communicates based on 485 communication, which uses differential signaling, and the logic '1' is represented by a voltage difference between two wires of + (2-6) V; a logical '0' is represented by a voltage difference between the two wires of- (2-6) V. Therefore, the 485 communication unit 110 has the capability of suppressing common mode interference; in addition, the bus transceiver has high sensitivity and can detect the voltage as low as 200mV, so that the transmission signal can be recovered beyond kilometers, thereby having longer communication distance.
In an embodiment of the present invention, the 485 communication unit 110 includes a shielded twisted pair. In other words, the 485 signal line uses the shield line as the wiring, since the 485 signal is transmitted in the differential mode, i.e., the voltage difference between 485+ and 485-is used as the signal transmission. If an interference source is arranged outside to interfere with the 485-type communication equipment, when 485 signal transmission is carried out by using the shielded twisted pair, interference effects on 485+ and 485-are the same due to the twisted pair, so that voltage difference is still unchanged, interference on 485 signals is minimized, stability and reliability of signal transmission can be ensured, and reliability of a communication process is improved.
It can be understood that the 485 communication unit 110 includes, for example, a first 485 chip disposed on the host 120 and a second 485 chip disposed on the slave 130, where the first 485 chip and the second 485 chip are connected by a shielded twisted pair, and the first 485 chip and the second 485 chip are based on a 485 communication protocol, so as to implement bidirectional 485 communication between the host 120 and the slave 130.
In a specific embodiment, the first preset time is set to be, for example, 2 seconds, and the second preset time is set to be, for example, 20 milliseconds. That is, in the process that the master 120 and the slave 130 communicate through the 485 communication unit 110, the master 120 sends the first data every 2 seconds, and the slave 130 sends the second data, that is, the response data to the master 120 after delaying for 20 milliseconds after receiving and verifying the first data to be valid. The master 120 and the slave 130 are in a transmission state only when data is transmitted, and are in a reception state at other times.
In one embodiment of the present invention, the communication system 100 is applied to a parking air conditioner, for example. As shown in fig. 2, the master unit 120 is, for example, an indoor unit controller of a parking air conditioner, and the slave unit 130 is an outdoor unit controller of the parking air conditioner. The indoor unit controller can be connected with a temperature detection sensor, a voltage detection sensor, a display panel, a remote controller and other components. The outdoor unit controller can be connected with the compressor, the external fan and other components.
In other words, the indoor and outdoor communication mode of the parking air conditioner adopts 485 communication and uses a shielded twisted pair. In the parking air conditioner, in an indoor and outdoor communication protocol, an indoor unit controller/an outdoor unit controller is in a sending state only when data is sent, and is in a receiving state at other times. The indoor unit controller sends the first data every 2 seconds, and the outdoor unit controller sends the second data, namely response data after delaying for 20 milliseconds after receiving and verifying the first data to be valid. Namely, the outdoor unit controller can acquire and monitor the running state of the outdoor unit through bidirectional 485 communication, so that the outdoor unit can be controlled accurately.
In a particular embodiment, the first data sent by the master 120 (indoor machine controller) to the slave 130 (outdoor machine controller) includes, for example, but is not limited to: the control method comprises the steps of on-off commands, target frequency of the press, driving frequency of the press, voltage shutdown protection values, current shutdown protection values and the like.
The response data sent from the slave 130 (outdoor unit controller) to the master 120 (indoor unit controller), i.e., the second data, includes, for example and without limitation: the system comprises a press, a control system and a control system, wherein the press comprises a press running frequency, a whole machine current value, a press driving module fault, an outdoor environment temperature, an outdoor coil temperature, an outdoor exhaust temperature, a sensor fault and the like.
In one embodiment of the present invention, as shown in fig. 3, the communication system 100 further includes a power terminal 140, for example. One end of the power connection terminal 140 is connected to a power source, and the other end of the power source terminal is connected to power lines of the master 120 and the slave 130, respectively, and the power source supplies power to the master 120 and the slave 130 through the power connection terminal 140, respectively. The power source is, for example, a battery.
In other words, as shown in fig. 3, the power lines of the indoor unit controller and the outdoor unit controller are combined into one terminal, i.e., the power connection terminal 140, and the power lines of the indoor unit controller are connected by the air-connected terminal. Through this kind of mounting means, can avoid installing the problem of irregularity, for example indoor set controller connects the battery, and off-premises station controller connects truck starter etc to prevent to damage 485 communication unit 110, cause indoor outer communication trouble, improved indoor outer communication reliability.
In one embodiment of the present invention, the host 120 receives the first checking error message, and responds to the first checking error message to execute the first predetermined error mechanism processing action.
In an embodiment, for example, when the host 120 does not correctly receive the second data sent from the slave 130 for a first predetermined number of times, for example, 10 times, that is, the header is incorrect or the checksum verification error, at this time, the host 120 receives the first verification error message, and according to the first verification error message, the host 120 performs a first predetermined error mechanism processing action. The process of the host 120 executing the first predetermined error mechanism processing action includes: UART (Universal Asynchronous Receiver/Transmitter) hardware initialization, reception related variable initialization, and the like.
Further, in an embodiment of the present invention, the host 120 receives the first communication abnormal information, and performs the action of resetting the 485 communication unit 110 in response to the first communication abnormal information until receiving the communication normal information or the communication system is powered off.
In one embodiment, for example, after the host 120 performs the first predetermined error mechanism handling action, the communication is still abnormal, and at this time, the host 120 receives the first communication abnormal information, and in response to the first communication abnormal information, the host 120 resets the 485 communication unit 110 once. That is, the host 120 resets the 485 communication unit 110 once every time the first communication abnormality message is received, until the communication normal message is received (i.e., the communication is recovered to normal) or the communication system 100 is powered off. In other words, if the host 120 still performs the first predetermined error mechanism processing operation and the communication is still abnormal, the 485 communication unit 110 is reset every 10 times until the communication is recovered or the system is powered off.
Further, in an embodiment of the present invention, the host 120 receives the second communication abnormal information, and responds to the second communication abnormal information to execute the malfunction alerting action until receiving the communication normal information.
In an embodiment, for example, when the master 120 does not correctly receive the second data sent from the slave 130 for a second preset number of times, for example, 60 times, at this time, the master 120 receives the second communication abnormal information, and according to the second communication abnormal information, the master 120 performs a fault alarm prompting action, for example, a fault alarm prompting is performed through a display screen, such as a display panel of an indoor unit, until the communication returns to normal. In this process, the master 120 still sends the first data to the slave 130 according to the appointed time sequence, and if the second data sent by the slave 130 is correctly received, the fault alarm prompt is cancelled.
In one embodiment of the present invention, the slave 130 receives the second error checking message and responds to the second error checking message to execute the second default error mechanism processing action.
In an embodiment, for example, when the slave 130 does not correctly receive the first data sent by the host 120 for a third predetermined number of times, for example, 10 times, that is, the header is incorrect or the checksum verification error, at this time, the slave 130 receives the second verification error message, and according to the second verification error message, the slave 130 executes the second predetermined error mechanism processing action. The process of the slave 130 executing the second predetermined error mechanism processing action includes: UART hardware initialization, receive related variable initialization, etc.
Further, in an embodiment of the present invention, the slave 130 receives the third abnormal communication information, and performs the action of resetting the 485 communication unit 110 in response to the third abnormal communication information until receiving the normal communication information or the power off of the communication system.
In an embodiment, for example, after the slave 130 performs the second predetermined error mechanism handling action, the communication is still abnormal, and at this time, the slave 130 receives the third communication abnormal information, and in response to the third communication abnormal information, the slave 130 resets the communication unit 110 once. That is, the slave 130 resets the 485 communication unit 110 once every time the third communication abnormality information is received, until the communication normal information is received (i.e., the communication is restored to normal) or the communication system 100 is powered off. In other words, if the slave 130 still performs the second predetermined error mechanism processing operation and then the communication is still abnormal, the 485 communication unit 110 is reset every 10 times until the communication is recovered or the system is powered off. Further, if the communication is restored to normal after the reset, the slave 130 normally executes according to the original logic, that is, receives the first data, delays for a second preset time after the first data is verified, and sends the second data to the host 120 through the 485 communication unit 110.
In an embodiment of the present invention, the master 120 and the slave 130 are both provided with a watchdog module (not shown in the figure), the master 120 and the slave 130 receive an initialization instruction, respond to the initialization instruction to respectively correspond to the enabled watchdog module, and the master 120 and the slave 130 receive a dog feeding instruction, respond to the dog feeding instruction to respectively correspond to the executed dog feeding action, so as to avoid resetting the watchdog module.
Specifically, when the parking air conditioner is installed in an irregular manner and is not powered on at the same time, and under the conditions of strong interference caused by the environment where the parking air conditioner operates and the vehicle, the 485 chip is easily halted, and in order to avoid the 485 chip halted due to the above conditions, the CPUs (central processing units) of the host computer 120 and the slave computer 130 enable the respective watchdog modules. When software is initialized, an initialization instruction is received to enable the watchdog, and after the main loop is entered, a watchdog feeding instruction is received to start the watchdog function to feed the watchdog in multiple places of the software, so that the watchdog is prevented from resetting.
Therefore, the embodiment of the utility model provides a two-way 485 communication is increased at the parking air conditioner for the parking air conditioner adopts indoor outer 485 two-way communication, has realized the frequency conversion control of air conditioner, through acquireing off-premises station running state, can implement a series of system protection measures, guarantees that system's safe and reliable moves. Meanwhile, by adding an indoor and outdoor communication abnormity processing measure, the reliability of indoor and outdoor communication is greatly enhanced, the phenomenon that the air conditioner is trapped in an abnormal condition due to communication faults is avoided, and the communication reliability is improved.
According to the utility model discloses a communication system can be applied to the parking air conditioner, adopts two-way 485 communications, has promoted the reliability of the outdoor machine communication of parking air conditioner under installation and complicated service environment, avoids leading to the parking air conditioner to be absorbed in the abnormal conditions because of communication trouble to the security of parking air conditioner has been improved, and in addition, the off-premises station controller can acquire and monitor off-premises station running state through two-way 485 communications, thereby does benefit to and carries out accurate control to the off-premises station.
The embodiment of the utility model provides a parking air conditioner has still been provided. This parking air conditioner includes: indoor set, off-premises station and the communication system of any one of the above-mentioned embodiments of the present invention.
According to the utility model discloses a parking air conditioner adopts two-way 485 communications, has promoted the reliability of parking air conditioner outdoor unit communication under installation and complicated service environment, avoids leading to the parking air conditioner to be absorbed in the abnormal conditions because of communication trouble to improve the security of parking air conditioner, in addition, the off-premises station controller can acquire and monitor off-premises station running state through two-way 485 communications, thereby does benefit to and carries out accurate control to the off-premises station.
In addition, other configurations and functions of the parking air conditioner according to the above embodiments of the present invention are known to those skilled in the art, and are not described in detail to reduce redundancy.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A communication system, comprising: 485 communication unit and host computer and slave computer which are communicated with each other by the 485 communication unit, the host computer is an indoor machine controller of the parking air conditioner, the slave computer is an outdoor machine controller of the parking air conditioner, wherein,
the master machine is used for timing through a built-in timer so as to send data to the slave machine through the 485 communication unit at intervals of first preset time;
the slave computer is used for timing through a built-in timer so as to send data to the host computer through the 485 communication unit within a second preset time after receiving the data sent by the host computer, wherein the 485 communication unit comprises a shielded twisted pair.
2. The communication system of claim 1, further comprising:
and one end of the power supply wiring terminal is connected with a power supply, the other end of the power supply terminal is respectively connected with power lines of the host and the slave, and the power supply supplies power to the host and the slave through the power supply wiring terminal.
3. The communication system of claim 2, wherein the host receives a first parity error message and performs a first default error mechanism handling action in response to the first parity error message.
4. The communication system of claim 3, wherein the host receives a first communication exception message and performs an action of resetting the 485 communication unit in response to the first communication exception message until a communication normal message is received or the communication system is powered off.
5. The communication system according to claim 4, wherein the host receives a second communication abnormality message, and performs a malfunction alert prompt in response to the second communication abnormality message until receiving the communication normality message.
6. The communication system of claim 5, wherein the slave receives a second error checking message and performs a second default error mechanism handling action in response to the second error checking message.
7. The communication system of claim 6, wherein the slave device receives a third communication abnormality message, and performs an action of resetting the 485 communication unit in response to the third communication abnormality message until a communication normal message is received or the communication system is powered off.
8. The communication system according to claim 1, wherein the master and the slave are provided with watchdog modules, the master and the slave receive an initialization instruction to enable the watchdog modules correspondingly in response to the initialization instruction, and receive a dog feeding instruction to perform a dog feeding action correspondingly in response to the dog feeding instruction, so as to prevent the watchdog modules from being reset.
9. A parking air conditioner, comprising:
an indoor unit;
an outdoor unit; and
a communication system as claimed in any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022352203.0U CN214874101U (en) | 2020-10-20 | 2020-10-20 | Communication system and parking air conditioner with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022352203.0U CN214874101U (en) | 2020-10-20 | 2020-10-20 | Communication system and parking air conditioner with same |
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| Publication Number | Publication Date |
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| CN214874101U true CN214874101U (en) | 2021-11-26 |
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| CN202022352203.0U Active CN214874101U (en) | 2020-10-20 | 2020-10-20 | Communication system and parking air conditioner with same |
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