CN113588314A - Air conditioning unit testing system and testing method - Google Patents
Air conditioning unit testing system and testing method Download PDFInfo
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- CN113588314A CN113588314A CN202110949569.2A CN202110949569A CN113588314A CN 113588314 A CN113588314 A CN 113588314A CN 202110949569 A CN202110949569 A CN 202110949569A CN 113588314 A CN113588314 A CN 113588314A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 172
- 238000012360 testing method Methods 0.000 title claims abstract description 49
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- 238000004891 communication Methods 0.000 claims abstract description 29
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The invention relates to a test system and a test method of an air conditioning unit, wherein the system comprises a power supply unit, a safety loop control unit, a communication unit, a data acquisition unit, a fault processing unit and an external unit; the method comprises the following steps: supplying power to the air conditioning unit to realize the operation of the air conditioning unit; realizing communication interaction with the air conditioning unit and controlling the running state of the air conditioning unit; collecting current, voltage and temperature data when the air conditioning unit stably operates, and analyzing and comparing the data to judge whether the air conditioning unit normally operates; when the abnormal work of the air conditioning unit is detected, controlling the on-off of hardware in the air conditioning unit or adjusting the working state of the air conditioning unit through software; the method comprises the steps of establishing a safety loop when supplying power to the air conditioning unit, interacting communication with the air conditioning unit and collecting data of stable operation of the air conditioning unit, and stopping all work when any step works abnormally. The invention is suitable for the detection of various air conditioning units with different models, and provides safety guarantee in the detection process.
Description
Technical Field
The invention relates to the technical field of electrical equipment detection, in particular to a system and a method for testing an air conditioning unit.
Background
With the economic development and the improvement of the living standard of people, at present, air conditioners are generally arranged in carriages of high-speed railway motor cars in large-scale shopping malls, office places and resident houses for adjusting the indoor temperature to a temperature suitable for the work and the life of people. After the air conditioning unit breaks down, the air conditioning unit needs to be sent to a maintenance department to be overhauled, and after some minor repair or major repair, the air conditioning unit needs to be tested before the air conditioning unit is installed in order to meet normal use.
However, in the prior art, the air conditioning unit needs to perform operation function detection after minor repair or major repair, and at this time, each unit must return to a laboratory for testing, so that the test efficiency is low due to complex operation, and in order to solve the problem, the air conditioning unit is disclosed as follows: CN105352750A, a chinese patent, provides a system and a method for testing air conditioning units, which can realize on-site detection, and in the system, the on-line detection of the air conditioning units is realized through a movable test cabinet, but the system and the method for testing air conditioning units have certain defects:
firstly, the universality is poor, and only the detection of a single air conditioning unit can be realized, but the types of the air conditioning units used in different scenes are different, and the universal detection of air conditioners with different types cannot be realized;
secondly, in the existing system for testing the air conditioning unit, the power supply control is not complete, and a component starting switch only has a protection mechanism, so that potential safety hazards exist.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problems of poor universality and low safety performance of the air conditioning unit testing system in the prior art, and provide an air conditioning unit testing system and a testing method, which are suitable for the detection of various air conditioning units with different models and provide safety guarantee in the detection process.
In order to solve the technical problem, the invention provides an air conditioning unit testing system which comprises a testing cabinet connected with an air conditioning unit, wherein a power supply unit, a safety loop control unit, a communication unit, a data acquisition unit, a fault processing unit and an external unit are arranged in the testing cabinet;
the power supply unit is connected with the air conditioning unit to supply power to the air conditioning unit;
the safety loop control unit is connected with the power supply unit, the communication unit and the data acquisition unit in series to form a loop, and when any hardware in the power supply unit, the communication unit and the data acquisition unit is disconnected, the loop is disconnected;
the communication unit is connected with the air conditioning unit and is used for realizing information interaction between the test system and the air conditioning unit;
the data acquisition unit comprises a current acquisition data analysis unit, a pressure acquisition data analysis unit and a temperature acquisition data analysis unit and is used for detecting current, pressure and temperature when the air conditioning unit operates;
the fault processing unit is respectively connected with the data acquisition unit and the air conditioning unit, and the feedback of the running state of the air conditioning unit is acquired through data acquisition to realize the fault processing of the air conditioning unit;
the external unit realizes the connection between the power supply unit, the communication unit, the data acquisition unit, the fault processing unit and the air conditioning unit.
In one embodiment of the invention, the power supply unit comprises a circuit breaker, a leakage protector, a mutual inductor and a phase sequence protector, wherein the leakage protector is connected with the circuit breaker and used for leakage test, and transmits a test signal to the circuit breaker to control the on-off of the circuit breaker; the mutual inductor collects the voltage of a power line and judges whether the input voltage is stable or not; the phase sequence protector determines U, V, W a three-wire sequence.
In an embodiment of the present invention, the power supply unit further includes a power distribution module, and the power distribution module converts the power input by the power supply unit into the power required by the air conditioning unit.
In an embodiment of the invention, the current collecting and data analyzing unit collects current data after the air conditioning unit stably works through the mutual inductor, and compares the current data with a preset threshold value to realize the control of the current when the air conditioning unit works.
In an embodiment of the present invention, the pressure acquisition data analysis unit respectively acquires an internal pressure and an external pressure after the air conditioning unit stably operates, and controls the pressure when the air conditioning unit operates by comparing a pressure difference between the internal pressure and the external pressure.
In an embodiment of the invention, the pressure acquisition data analysis unit acquires voltage data of the air conditioning unit after stable operation through the sensor, and calculates corresponding pressure through a voltage-pressure formula.
In an embodiment of the present invention, the temperature acquisition data analysis unit respectively acquires an internal temperature and an external temperature after the air conditioning unit stably operates, and controls the operating temperature of the air conditioning unit by comparing a temperature difference between the internal temperature and the external temperature.
In one embodiment of the invention, the fault processing unit comprises hardware processing and software processing, wherein the hardware processing is used for circuit breaker trip protection when voltage overload, current overload and short circuit occur; and (4) software processing, namely adjusting the working state of the unit component through the data analysis and feedback state of the data acquisition unit.
In an embodiment of the present invention, the external unit includes external interfaces of different specifications and models, and an expansion interface is reserved on the cabinet.
In order to solve the technical problem, the invention also provides an air conditioning unit testing method, which comprises the following steps:
supplying power to the air conditioning unit to realize the operation of the air conditioning unit, and converting an input power supply into a power supply required by the air conditioning unit according to different types of the air conditioning unit;
realizing communication interaction with the air conditioning unit and controlling the running state of the air conditioning unit;
collecting current data, voltage data and temperature data when the air conditioning unit stably operates, and analyzing and comparing the data to judge whether the air conditioning unit normally operates;
when the abnormal work of the air conditioning unit is detected, controlling the on-off of hardware in the air conditioning unit or adjusting the working state of the air conditioning unit through software;
the method comprises the steps of establishing a safety loop when supplying power to the air conditioning unit, interacting communication with the air conditioning unit and collecting data of stable operation of the air conditioning unit, and stopping all work when any step works abnormally.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the air conditioning unit testing system comprises an independent power supply unit, can realize independent power supply to the air conditioning unit, is provided with a communication unit to realize control of the running state of the air conditioning unit and control the starting and stopping of the air conditioning unit, collects current data, voltage data and temperature data when the air conditioning unit stably runs through a data collection unit, analyzes and compares the data to judge whether the air conditioning unit normally works, and controls the on-off of hardware in the air conditioning unit through a fault processing unit or adjusts the working state of the air conditioning unit through software when the abnormal working of the air conditioning unit is detected;
and the safety loop control unit is connected with the power supply unit, the communication unit and the data acquisition unit in series to form a loop, a safety loop is constructed when power is supplied to the air conditioning unit, the safety loop is interacted with the communication of the air conditioning unit and the data of stable operation of the air conditioning unit is acquired, when any hardware in the power supply unit, the communication unit and the data acquisition unit is disconnected, the loop is disconnected, a protection mechanism in the system is set, the protection level is improved, and the system is widely applied to the rail traffic fields of high-speed rails, subways, trams and the like.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a block diagram of an air conditioning unit testing system of the present invention;
FIG. 2 is a flow chart of the steps of the air conditioning unit testing method of the present invention;
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, the air conditioning unit testing system of the present invention includes a testing cabinet connected to an air conditioning unit, wherein the testing cabinet is provided with a power supply unit, a safety loop control unit, a communication unit, a data acquisition unit, a fault processing unit and an external unit; the power supply unit, the communication unit, the data acquisition unit and the fault processing unit are connected with the air conditioning unit through the external unit, the power supply unit can independently supply power to the air conditioning unit, the communication unit controls the operation state of the air conditioning unit and controls the start and stop of the air conditioning unit, the data acquisition unit acquires current data, voltage data and temperature data when the air conditioning unit operates stably, analyzes and compares the data to judge whether the air conditioning unit operates normally, controls the on-off of hardware in the air conditioning unit through the fault processing unit or adjusts the operation state of the air conditioning unit through software when the abnormal operation of the air conditioning unit is detected, the safety loop control unit is connected with the power supply unit, the communication unit and the data acquisition unit in series to form a loop, and the safety loop control unit is used for supplying power to the air conditioning unit and interacting with the communication of the air conditioning unit, When any hardware in the power supply unit, the communication unit and the data acquisition unit is disconnected, the circuit is disconnected, a protection mechanism in the system is set, and the protection level is improved.
Specifically, the power supply unit comprises a circuit breaker, a leakage protector, a mutual inductor and a phase sequence protector, wherein the leakage protector is connected with the circuit breaker and used for leakage test, a test signal is transmitted to the circuit breaker to control the on-off of the circuit breaker, leakage protection is formed inside the power supply unit, the mutual inductor collects the voltage of a power line and judges whether the input voltage is stable or not; the phase sequence protector determines U, V, W three-wire sequence and wrong sequence, which affects subsequent operation and even damages equipment components.
Specifically, the power supply unit further comprises a power distribution assembly, the power distribution assembly converts a power supply input by the power supply unit into a power supply required by the air conditioning unit, the input power supply in the embodiment is a rated 380V power supply, the 380V input power supply can be converted into 380V, 220V, 110V, 24V, 10V and 5V through the power distribution assembly, power can be supplied to air conditioning units of different models, and power can also be supplied to different components in the air conditioning unit.
Specifically, the data acquisition unit comprises a current acquisition data analysis unit, a pressure acquisition data analysis unit and a temperature acquisition data analysis unit and is used for detecting current, pressure and temperature when the air conditioning unit operates.
The current data analysis unit collects current data after the air conditioning unit works stably through the mutual inductor, the current can be increased violently in the moment when the air conditioning unit is started, then the current falls back, the current tends to be stable along with the lengthening of the operation time, the mutual inductor collects the current value at the moment, the current value is compared with a preset threshold value, the control of the current when the air conditioning unit works is achieved, when the collected current value is higher than the preset threshold value, the air conditioning unit is proved to work abnormally at the moment, and fault processing is conducted on the air conditioning unit through the fault processing unit.
Specifically, when the air conditioning unit works, the pressure value cannot be directly acquired, the pressure acquisition data analysis unit acquires voltage data after the air conditioning unit stably works through the sensor, the voltage is suddenly increased at the moment of starting the air conditioning unit and then falls back, the voltage tends to be stable along with the lengthening of the operation time, the voltage value is acquired through the sensor at the moment, and the corresponding pressure is calculated through a voltage-pressure formula;
specifically, the sensors are divided into a low-pressure sensor and a high-pressure sensor, and the voltage-pressure formulas are respectively as follows:
a low pressure sensor: p (bar) 2.25 × Vout-2.28;
a high-pressure sensor: p (bar) 8.5 Vout-4.25;
wherein p (bar) is a pressure value, Vout is a voltage value;
specifically, the pressure acquisition data analysis unit respectively acquires the internal pressure and the external pressure after the air conditioning unit stably works, the control of the working pressure of the air conditioning unit is realized by comparing the pressure difference between the internal pressure and the external pressure, when the acquired pressure difference is higher than a preset threshold value, the abnormal work of the air conditioning unit is proved at the moment, and the fault processing unit carries out fault processing on the air conditioning unit.
The temperature acquisition data analysis unit respectively acquires the internal temperature and the external temperature of the air conditioning unit after stable operation, the temperature control of the air conditioning unit during operation is realized by comparing the temperature difference between the internal temperature and the external temperature, when the acquired temperature difference is higher than a preset threshold value, the air conditioning unit is proved to work abnormally, and the fault processing unit is used for carrying out fault processing on the air conditioning unit;
specifically, the temperature acquisition data analysis unit obtains a voltage value of a fixed-value resistor by a resistor dividing method, then the total voltage is subtracted to calculate the voltage of the temperature sensor, the voltage is converted into a resistor, and then a resistor-temperature formula (0-850 ℃) is used for calculating to obtain the specific temperature:
Rt=R*(1+At+Bt2)
wherein: rt is the resistance value at the temperature t; r is a nominal resistance value at 0 ℃; t is a temperature value, A, B is constant, A is 3.9083 x 10-3、B=-5.775*10-7。
In this embodiment, the fault processing unit includes hardware processing and software processing, and the hardware processing is used for tripping protection of the circuit breaker when voltage overload, current overload and short circuit occur; the software processing adjusts the working state of the unit component through the data analysis and feedback state of the data acquisition unit, and different processing modes can be selected according to different conditions.
In this embodiment, the external unit includes external interfaces of different specifications and models, is applicable to all types of air conditioning units, and an extension interface is reserved on the cabinet to meet the requirements of testing of special unit components, and current, pressure and temperature acquisition can be used for other purposes, not only as an air conditioning unit component, but also as other equipment tests.
Referring to fig. 2, the testing method of the air conditioning unit according to the present invention can be implemented based on the testing system, and includes the following steps:
supplying power to the air conditioning unit to realize the operation of the air conditioning unit, and converting an input power supply into a power supply required by the air conditioning unit according to different types of the air conditioning unit;
realizing communication interaction with the air conditioning unit and controlling the running state of the air conditioning unit;
collecting current data, voltage data and temperature data when the air conditioning unit stably operates, and analyzing and comparing the data to judge whether the air conditioning unit normally operates;
when the abnormal work of the air conditioning unit is detected, controlling the on-off of hardware in the air conditioning unit or adjusting the working state of the air conditioning unit through software;
the method comprises the steps of establishing a safety loop when supplying power to the air conditioning unit, interacting communication with the air conditioning unit and collecting data of stable operation of the air conditioning unit, and stopping all work when any step works abnormally.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A test system of an air conditioning unit comprises a test cabinet connected with the air conditioning unit, and is characterized in that a power supply unit, a safety loop control unit, a communication unit, a data acquisition unit, a fault processing unit and an external unit are arranged in the test cabinet;
the power supply unit is connected with the air conditioning unit to supply power to the air conditioning unit;
the safety loop control unit is connected with the power supply unit, the communication unit and the data acquisition unit in series to form a loop, and when any hardware in the power supply unit, the communication unit and the data acquisition unit is disconnected, the loop is disconnected;
the communication unit is connected with the air conditioning unit and is used for realizing information interaction between the test system and the air conditioning unit;
the data acquisition unit comprises a current acquisition data analysis unit, a pressure acquisition data analysis unit and a temperature acquisition data analysis unit and is used for detecting current, pressure and temperature when the air conditioning unit operates;
the fault processing unit is respectively connected with the data acquisition unit and the air conditioning unit, and the feedback of the running state of the air conditioning unit is acquired through data acquisition to realize the fault processing of the air conditioning unit;
the external unit realizes the connection between the power supply unit, the communication unit, the data acquisition unit, the fault processing unit and the air conditioning unit.
2. The air conditioning unit testing system of claim 1, wherein: the power supply unit comprises a circuit breaker, a leakage protector, a mutual inductor and a phase sequence protector, wherein the leakage protector is connected with the circuit breaker and used for leakage test, and transmits a test signal to the circuit breaker to control the on-off of the circuit breaker; the mutual inductor collects the voltage of a power line and judges whether the input voltage is stable or not; the phase sequence protector determines U, V, W a three-wire sequence.
3. The air conditioning unit testing system of claim 1, wherein: the power supply unit also comprises a power supply distribution assembly, and the power supply distribution assembly converts the power supply input by the power supply unit into the power supply required by the air conditioning unit.
4. The air conditioning unit testing system of claim 1, wherein: the current acquisition data analysis unit acquires current data after the air conditioning unit stably works through the mutual inductor and compares the current data with a preset threshold value to realize the control of the current of the air conditioning unit during working.
5. The air conditioning unit testing system of claim 1, wherein: the pressure acquisition data analysis unit respectively acquires the internal pressure and the external pressure after the air conditioning unit stably works, and the pressure control of the air conditioning unit during working is realized by comparing the pressure difference between the internal pressure and the external pressure.
6. The air conditioning unit testing system of claim 1, wherein: the pressure acquisition data analysis unit acquires voltage data of the air conditioning unit after stable operation through the sensor and calculates corresponding pressure through a voltage-pressure formula.
7. The air conditioning unit testing system of claim 1, wherein: the temperature acquisition data analysis unit respectively acquires the internal temperature and the external temperature after the air conditioning unit stably works, and the temperature control of the air conditioning unit during working is realized by comparing the temperature difference between the internal temperature and the external temperature.
8. The air conditioning unit testing system of claim 1, wherein: the fault processing unit comprises hardware processing and software processing, and the hardware processing is used for tripping protection of the circuit breaker when voltage is overloaded, current is overloaded and the circuit breaker is short-circuited; and (4) software processing, namely adjusting the working state of the unit component through the data analysis and feedback state of the data acquisition unit.
9. The air conditioning unit testing system of claim 1, wherein: the external unit comprises external interfaces with different specifications and models, and an expansion interface is reserved on the machine cabinet.
10. An air conditioning unit testing method is characterized in that: the method comprises the following steps:
supplying power to the air conditioning unit to realize the operation of the air conditioning unit, and converting an input power supply into a power supply required by the air conditioning unit according to different types of the air conditioning unit;
realizing communication interaction with the air conditioning unit and controlling the running state of the air conditioning unit;
collecting current data, voltage data and temperature data when the air conditioning unit stably operates, and analyzing and comparing the data to judge whether the air conditioning unit normally operates;
when the abnormal work of the air conditioning unit is detected, controlling the on-off of hardware in the air conditioning unit or adjusting the working state of the air conditioning unit through software;
the method comprises the steps of establishing a safety loop when supplying power to the air conditioning unit, interacting communication with the air conditioning unit and collecting data of stable operation of the air conditioning unit, and stopping all work when any step works abnormally.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114838968A (en) * | 2022-04-28 | 2022-08-02 | 江苏一万节能科技股份有限公司 | Air conditioner fault detection method and system based on cold water cooling test |
CN114838968B (en) * | 2022-04-28 | 2023-10-20 | 江苏一万节能科技股份有限公司 | Air conditioner fault detection method and system based on cold water cooling test |
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