CN107741078B - Detection device and detection method - Google Patents

Detection device and detection method Download PDF

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Publication number
CN107741078B
CN107741078B CN201710894629.9A CN201710894629A CN107741078B CN 107741078 B CN107741078 B CN 107741078B CN 201710894629 A CN201710894629 A CN 201710894629A CN 107741078 B CN107741078 B CN 107741078B
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detection
communication
outdoor unit
indoor unit
current loop
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CN107741078A (en
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张智恒
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Abstract

The invention provides a detection device and a detection method. Wherein, a detection device for the air conditioner, this air conditioner includes indoor set and off-premises station, and this detection device includes: a processor; a communication port; and the at least two groups of current loop communication circuits are respectively connected with the processor, output to the communication port and respectively connected with the current loop communication circuits in the indoor unit and the outdoor unit through the communication port. The detection device provided by the invention has the function of automatically detecting communication faults when being electrified, can detect the communication faults of the indoor unit and the outdoor unit, is simple and easy to use, can greatly improve the efficiency of research, development and debugging and after-sale overhaul of the air conditioner, and reduces the after-sale cost.

Description

Detection device and detection method
Technical Field
The invention relates to the technical field of air conditioner detection, in particular to a detection device and a detection method.
Background
The inverter air conditioner has relatively complex functions, the product development and after-sales maintenance are difficult, particularly, communication faults in the after-sales maintenance process account for a large proportion of total maintenance faults, but no effective detection means is provided for detecting whether an indoor unit fault or an outdoor unit fault exists, so that maintenance personnel cannot locate indoor or outdoor electric control faults, the indoor and outdoor electric controls are often replaced together, the maintenance cost is high, and the workload is large; in addition, the professional level of workers for maintaining the air conditioner is limited, and the maintenance is often performed aloft, so that a device which is simple and easy to use and is provided with a communication fault detection method is needed to solve the difficulties in the development and after-sale maintenance processes of the variable frequency air conditioner.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an aspect of the present invention is to provide a detection apparatus.
Another aspect of the present invention is to provide a method of detection.
In view of the above, the present invention provides a detection device for an air conditioner, the air conditioner including an indoor unit and an outdoor unit, the detection device comprising: a processor; a communication port; and the at least two groups of current loop communication circuits are respectively connected with the processor, output to the communication port and respectively connected with the current loop communication circuits in the indoor unit and the outdoor unit through the communication port.
The detection device comprises a processor, a communication port and at least two sets of current loop communication circuits, and preferably comprises two sets of current loop communication circuits. The processors are respectively connected through two groups of current loop communication circuits; the two groups of current loop communication circuits are output to the communication port; the two groups of current loop communication circuits are respectively matched with the current loop communication circuits in the indoor unit and the outdoor unit to form two groups of current loop communication links, so that the detection device can be used as the indoor unit to detect the communication of the outdoor unit, and can also simulate the outdoor unit to detect the communication of the indoor unit. The detection device provided by the invention can be used for communicating with the indoor unit and the outdoor unit directly through the communication port without disassembling the outdoor unit electric control, has the function of automatically detecting communication faults by electrifying, can detect the communication faults of the indoor unit and the outdoor unit, avoids the problem that the indoor and outdoor electric controls are replaced together due to incapability of positioning the indoor or outdoor electric control faults in the related technology, is simple and easy to use, can greatly improve the efficiency of research, development and debugging and after-sale maintenance of the air conditioner, and reduces the after-sale cost.
In addition, the detection device according to the present invention may further include the following additional features:
in the above technical solution, preferably, the detection apparatus further includes: and the display circuit is connected with the processor.
In the technical scheme, the display circuit is connected with the processor, the detection result is sent to the display circuit after the detection is finished, and the corresponding result display is carried out, so that maintenance personnel can visually check the detection result, and the fault problem positioning is facilitated.
In any of the above technical solutions, preferably, the display circuit is an LCD display circuit.
In the technical scheme, the LCD display circuit has the advantages of low voltage, micro power consumption, light weight, large display information amount and the like due to the characteristics of the LCD display circuit, so that the detection device has lower energy consumption, lighter weight and better display effect, and is more convenient for maintenance personnel to use.
In any one of the above technical solutions, preferably, the detection apparatus further includes: and the key selection circuit is connected with the processor.
In the technical scheme, the key selection circuit is connected with the CPU, and communication fault detection is started after the key selection circuit is triggered.
In any one of the above technical solutions, preferably, the detection apparatus further includes: a housing configured as a handheld housing; the key is arranged on the shell and is connected with the key selection circuit; and the display panel is arranged on the shell and is connected with the display circuit.
According to the technical scheme, the detection is triggered through the keys, and after the communication fault is detected, the detection result is automatically displayed on the display panel, so that the fault problem is conveniently positioned. To the maintenance personal, only need select the button, easy operation is convenient, does not have professional requirement to this detection device design is hand-held type, and is small and exquisite convenient, portable, can greatly promote research and development debugging and air conditioner after-sale maintenance efficiency.
The invention further provides a detection method, which is used for the detection device in any one of the above technical solutions, and the detection method comprises the following steps: receiving a detection instruction; respectively communicating with the indoor unit and the outdoor unit according to a preset time-sharing communication strategy; judging whether a feedback signal of the indoor unit and/or the outdoor unit is received or not within a preset time; and when the judgment result is negative, judging that the indoor unit and/or the outdoor unit has faults.
The detection method according to the present invention is applied to the detection apparatus according to any one of the above-described embodiments. The detection device is communicated with both the indoor unit and the outdoor unit, and is communicated with the indoor unit and the outdoor unit respectively according to a preset time-sharing communication strategy after receiving a detection instruction so as to ensure that only one of two communication links in the detection device works at the same time and an internal current loop cannot be formed in order to ensure reliable communication detection transmission; and after the detection lasts for a certain time and the information replied by the indoor unit or the outdoor unit is still not received, judging the communication fault of the indoor unit or the communication fault of the outdoor unit. The detection method provided by the invention has the function of automatically detecting the communication fault when being electrified, can simply, quickly and effectively detect the communication fault of the indoor unit and the outdoor unit of the variable frequency air conditioner, avoids the problem of replacing indoor and outdoor electric controls together due to the failure in positioning the indoor or outdoor electric control fault in the related technology, is simple and easy to use, can greatly improve the efficiency of research, development and debugging and after-sale maintenance of the air conditioner, and reduces the after-sale cost.
In the foregoing technical solution, preferably, the step of communicating with the indoor unit and the outdoor unit according to a preset time-sharing communication policy includes: communicating with one of the indoor unit or the outdoor unit at a first period of the detection cycle; communicating with the other of the indoor unit or the outdoor unit for a second period of the detection cycle; communication is stopped for a third time period of the detection cycle.
In the technical scheme, a communication detection cycle period is divided into three parts, the detection device in the first two parts works normally, the first time period is firstly communicated with one of an indoor unit or an outdoor unit, then the second time period is communicated with the other of the indoor unit or the outdoor unit, only one of two communication circuits in the detection device works at the same time, an internal current loop cannot be formed, and therefore communication reliability is ensured, and the third time period is a communication prohibition time period of the detection device, so that the communication of the indoor unit and the outdoor unit is recovered to an original state.
In any of the above technical solutions, preferably, the detection cycle includes at least a first time period, a second time period, and a third time period.
In this embodiment, the detection cycle at least includes a first time period, a second time period, and a third time period, but is not limited thereto. In addition, the detection cycle period and the duration of each time period may be set according to actual conditions, and are not limited herein.
In any of the above technical solutions, preferably, the detection method further includes: receiving a self-checking instruction; and enabling the two groups of current loop communication circuits of the detection device to communicate for self-detection according to the self-detection instruction.
In the technical scheme, the two groups of current loop communication circuits inside the device are enabled to receive and transmit data by receiving the self-checking instruction, whether the communication link of the detection device works normally or not is detected, the self-checking of the detection device is realized, the reliability of the detection device is improved, and the problem that the device fails to cause false detection is avoided.
In any of the above technical solutions, preferably, the detection method further includes: and displaying the detection result and/or the self-detection result.
According to the technical scheme, after the communication fault is detected, the detection result and/or the self-detection result are/is automatically displayed, and the fault problem is conveniently located.
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 shows a schematic structural view of a detector according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating the connection of a detector and an electric control system of an inverter air conditioner according to an embodiment of the invention;
FIG. 3 shows a schematic flow diagram of a detection method according to an embodiment of the invention;
FIG. 4 shows a schematic flow diagram of a detection method according to another embodiment of the invention;
FIG. 5 shows a schematic flow diagram of a detection method according to a further embodiment of the invention;
fig. 6 shows a schematic diagram of a communication failure detection cycle according to an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A detector according to one embodiment of the invention is described below with reference to figures 1 and 2.
Fig. 1 shows a schematic structural diagram of a detector according to an embodiment of the invention.
As shown in fig. 1, the detector includes a CPU (central processing unit); a communication port; a current loop communication circuit 1 and a current loop communication circuit 2. The CPU is respectively connected with the current loop communication circuit 1 and the current loop communication circuit 2 through two groups of receiving and transmitting IO ports (RXD1, TXD1, RXD2 and TXD 2); and both sets of current loop communication circuits are output to the communication port.
In an embodiment of the present invention, the communication port is an LNS communication port, and the current loop communication realizes communication through three wires, i.e., a live wire L, a neutral wire N and a communication wire S of the ac power supply. The LNS communication port is a strong-current interface, and the LNS communication port can be directly connected to a wiring terminal of an indoor unit and an outdoor unit without disassembling an air conditioner electric control board.
FIG. 2 is a schematic diagram illustrating the connection between a detector and an electric control system of an inverter air conditioner according to an embodiment of the invention.
As shown in fig. 2, the indoor unit electric control unit is composed of an indoor control panel and a current loop communication circuit 3, the outdoor unit electric control unit is composed of an outdoor control panel and a current loop communication circuit 4, and the current loop communication circuit 3 and the current loop communication circuit 4 are combined to form a current loop. The current loop communication circuit 1 and the current loop communication circuit 2 are respectively matched with the current loop communication circuit 3 in the indoor unit and the current loop communication circuit 4 in the outdoor unit to form two sets of current loop communication, so that the detector can be used as an indoor unit to detect the communication of the outdoor unit, and can simulate the outdoor unit to detect the communication of the indoor unit.
The detector provided by the invention can be used for communicating with the indoor unit and the outdoor unit directly through the communication port without disassembling the electric control of the indoor unit and the outdoor unit, has the function of automatically detecting communication faults by electrifying, can detect the communication faults of the indoor unit and the outdoor unit, avoids the problem of replacement of the indoor electric control and the outdoor electric control together caused by incapability of positioning the indoor electric control or the outdoor electric control fault in the related technology, is simple and easy to use, can greatly improve the efficiency of research, development and debugging and after-sale maintenance of the air conditioner, and reduces the after-sale cost.
In an embodiment of the present invention, preferably, the detecting apparatus further includes: and the LCD display circuit is connected with the CPU.
In the embodiment, the LCD display circuit is connected with the CPU, and the detection result is sent to the display circuit after the detection is finished, so that the corresponding result display is carried out, and the visual fault information positioning by maintenance personnel is facilitated.
In the embodiment, due to the characteristics of the LCD display circuit, the LCD display circuit has the advantages of low voltage, micro power consumption, light weight, large display information amount and the like, so that the detector is lower in energy consumption, lighter in weight and better in display effect, and is more convenient for maintenance personnel to use.
In an embodiment of the present invention, preferably, the detecting apparatus further includes: and the key selection circuit is connected with the CPU.
In this embodiment, the key selection circuit is connected to the CPU, and when the key selection circuit is triggered, communication failure detection is started.
In an embodiment of the present invention, preferably, the detecting apparatus further includes: a housing configured as a handheld housing; the key is arranged on the shell and is connected with the key selection circuit; and the LCD display screen is arranged on the shell and is connected with the LCD display circuit.
In the embodiment, the detection is triggered through the keys, and after the communication fault is detected, the detection result is automatically displayed on the LCD display screen, so that the fault problem is conveniently positioned. To the maintenance personal, only need select the button, easy operation is convenient, does not have professional requirement to this detector design is hand-held type, and is small and exquisite convenient, portable, can greatly promote research and development debugging and air conditioner after-sale maintenance efficiency.
Those skilled in the art will appreciate that the detector includes two sets of current loop communication circuits, but is not so limited. Only two groups are taken as examples for explanation, and the current loop communication circuit can be designed to be matched with the indoor and outdoor electronic control respectively to form a current loop communication link, so that the communication fault detection of the indoor and outdoor units can be realized.
Fig. 3 is a schematic flow chart of a detection method according to an embodiment of the present invention. Wherein the detection method is used for the detector as in any one of the above embodiments, and the detection method comprises the following steps:
step 302, receiving a detection instruction;
step 304, respectively communicating with the indoor unit and the outdoor unit according to a preset time-sharing communication strategy;
step 306, judging whether feedback signals of the indoor unit and/or the outdoor unit are received or not within preset time;
and 308, judging that the indoor unit and/or the outdoor unit has a fault when the judgment result is negative.
The detection method provided by the invention is applied to the detector in any one of the embodiments. The detector is communicated with both the indoor unit and the outdoor unit, and is communicated with the indoor unit and the outdoor unit respectively according to a preset time-sharing communication strategy after receiving a detection instruction so as to ensure that only one of two communication links in the detection device works at the same time and an internal current loop cannot be formed in order to ensure reliable communication detection transmission; and after the detection lasts for a certain time and the information replied by the indoor unit or the outdoor unit is still not received, judging the communication fault of the indoor unit or the communication fault of the outdoor unit. The detection method provided by the invention has the function of automatically detecting the communication fault when being electrified, can simply, quickly and effectively detect the communication fault of the indoor unit and the outdoor unit of the variable frequency air conditioner, avoids the problem of replacing indoor and outdoor electric controls together due to the failure in positioning the indoor or outdoor electric control fault in the related technology, is simple and easy to use, can greatly improve the efficiency of research, development and debugging and after-sale maintenance of the air conditioner, and reduces the after-sale cost.
Fig. 4 is a schematic flow chart of a detection method according to another embodiment of the present invention. Wherein the detection method is used for the detector as in any one of the above embodiments, and the detection method comprises the following steps:
step 402, receiving a detection instruction;
step 404, communicating with the indoor unit in a first time period of the detection cycle period; communicating with the outdoor unit during a second time period of the detection cycle; stopping communication for a third time period of the detection cycle;
step 406, judging whether a feedback signal of the indoor unit and/or the outdoor unit is received within a preset time;
and step 408, judging that the indoor unit and/or the outdoor unit has a fault when the judgment result is negative.
In this embodiment, a time-share communication strategy is designed on the communication fault detection software, as shown in fig. 6 in detail. The communication detection cycle period is divided into three parts, the detectors in the first two parts work normally, the first time period is communicated with the indoor unit, then the second time period is communicated with the outdoor unit, only one of two communication circuits in the detectors works at the same time, an internal current loop cannot be formed, and therefore communication reliability is guaranteed, the third time period is a communication prohibition time period of the detectors, and the communication of the indoor unit and the outdoor unit is recovered to an original state.
It should be understood by those skilled in the art that the first time period may also be implemented to communicate with the outdoor unit first, and then communicate with the indoor unit in the second time period, as long as it can be ensured that only one of the two communication circuits in the detector operates at the same time, and an internal current loop is not formed, thereby ensuring the reliability of communication.
In any of the above embodiments, preferably, the detection cycle period includes at least a first time period, a second time period, and a third time period.
In this embodiment, the detection cycle period includes at least a first time period, a second time period and a third time period, but is not limited thereto. In addition, the detection cycle period and the duration of each time period may be set according to actual conditions, and are not limited herein.
Fig. 5 is a schematic flow chart of a detection method according to still another embodiment of the present invention. Wherein the detection method is used for the detector as in any one of the above embodiments, and the detection method comprises the following steps:
step 502, receiving a detection instruction;
step 504, communicating with the indoor unit in a first time period of the detection cycle period; communicating with the outdoor unit during a second time period of the detection cycle; stopping communication for a third time period of the detection cycle;
step 506, judging whether feedback signals of the indoor unit and/or the outdoor unit are received within preset time;
step 508, when the judged result is negative, judging that the indoor unit and/or the outdoor unit is in fault;
step 510, receiving a self-checking instruction;
step 512, enabling the two groups of current loop communication circuits of the detector to communicate for self-checking according to the self-checking instruction;
and step 514, displaying the detection result and/or the self-detection result.
In this embodiment, through receiving the self-checking instruction, enable inside two sets of current loop communication circuit, carry out data receiving and dispatching, whether check out test set self communication link is normal work, realize the detector self-checking, promoted the reliability of detector self, avoid device self trouble and lead to the problem emergence of false detection.
In the embodiment, after the communication fault is detected, the detection result and/or the self-detection result are/is automatically displayed, so that the fault problem is conveniently positioned.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A detection device, characterized in that, be used for the air conditioner, the air conditioner includes indoor set and off-premises station, detection device includes:
a processor;
a communication port;
at least two groups of current loop communication circuits which are respectively connected with the processor, and at least two groups of current loop communication circuits which are output to the communication port and are respectively connected with the current loop communication circuits in the indoor unit and the outdoor unit through the communication port;
the processor is specifically configured to:
receiving a detection instruction;
respectively communicating with the indoor unit and the outdoor unit according to a preset time-sharing communication strategy;
judging whether a feedback signal of the indoor unit and/or the outdoor unit is received or not within a preset time;
when the judgment result is negative, judging that the indoor unit and/or the outdoor unit has a fault;
the step of respectively communicating with the indoor unit and the outdoor unit according to a preset time-sharing communication strategy specifically comprises:
communicating with one of the indoor unit or the outdoor unit for a first period of a detection cycle;
communicating with the other of the indoor unit or the outdoor unit for a second period of the detection cycle;
and stopping communication in a third time period of the detection cycle period.
2. The detection device according to claim 1, further comprising:
and the display circuit is connected with the processor.
3. The detection apparatus according to claim 2,
the display circuit is an LCD display circuit.
4. The detection apparatus according to claim 2 or 3, characterized in that the detection apparatus further comprises:
and the key selection circuit is connected with the processor.
5. The detection device according to claim 4, further comprising:
a housing configured as a handheld housing;
the key is arranged on the shell and connected with the key selection circuit;
and the display panel is arranged on the shell and is connected with the display circuit.
6. A detection method for use in a detection apparatus according to any one of claims 1 to 5, the detection method comprising:
receiving a detection instruction;
respectively communicating with the indoor unit and the outdoor unit according to a preset time-sharing communication strategy;
judging whether a feedback signal of the indoor unit and/or the outdoor unit is received or not within a preset time;
and when the judgment result is negative, judging that the indoor unit and/or the outdoor unit has faults.
7. The detection method according to claim 6, further comprising:
receiving a self-checking instruction;
and enabling the two groups of current loop communication circuits of the detection device to communicate for self-detection according to the self-detection instruction.
8. The detection method according to claim 7, further comprising:
and displaying the detection result and/or the self-detection result.
CN201710894629.9A 2017-09-28 2017-09-28 Detection device and detection method Active CN107741078B (en)

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Application Number Priority Date Filing Date Title
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CN108732452B (en) * 2018-05-31 2020-05-15 广东美芝制冷设备有限公司 Air conditioning system and communication detection method and device of current loop communication circuit of air conditioning system
CN110686359B (en) * 2018-07-06 2021-05-25 青岛海尔空调器有限总公司 Fault diagnosis method for variable frequency air conditioner
CN110687428A (en) * 2018-07-06 2020-01-14 青岛海尔空调器有限总公司 Frequency conversion air conditioner fault detection frock with wireless function
CN110686358B (en) * 2018-07-06 2021-06-08 青岛海尔空调器有限总公司 Variable frequency air conditioner fault diagnosis method based on detection tool
CN110687364A (en) * 2018-07-06 2020-01-14 青岛海尔空调器有限总公司 Fault detection tool for variable-frequency air conditioner
CN110822595A (en) * 2019-11-12 2020-02-21 常州瑞创电器科技有限公司 Operation method and device of full-direct-current solar variable frequency air conditioner
CN110925961A (en) * 2019-11-26 2020-03-27 格力电器(重庆)有限公司 On-site fault detection system and method for air conditioner
CN112254273B (en) * 2020-10-19 2021-09-03 珠海格力电器股份有限公司 Air conditioner communication abnormity prevention control method, computer device and computer readable storage medium

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