CN107575997B - Air conditioning system and method and device for monitoring pipeline breakage in operation of air conditioning system - Google Patents
Air conditioning system and method and device for monitoring pipeline breakage in operation of air conditioning system Download PDFInfo
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- CN107575997B CN107575997B CN201711014183.2A CN201711014183A CN107575997B CN 107575997 B CN107575997 B CN 107575997B CN 201711014183 A CN201711014183 A CN 201711014183A CN 107575997 B CN107575997 B CN 107575997B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 94
- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052802 copper Inorganic materials 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 10
- 230000003213 activating effect Effects 0.000 claims 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a method and a device for monitoring pipeline breakage in the operation of an air conditioning system. The method comprises the following steps: step 1, detecting an exhaust pressure Pi and an outer surface temperature Ti of the middle part of an evaporator copper pipe flow path every a preset time t after the air conditioning system is started and operated; step 2, calculating the change amount delta Pi of the exhaust pressure and the change amount delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in the adjacent time interval; step 3, comparing the change quantity delta Pi of the exhaust pressure with a delta P valve, simultaneously comparing the change quantity delta Ti of the outer surface of the middle part of the copper pipe flow path of the evaporator with a delta T valve, and when the delta Pi is more than or equal to the delta P valve and the delta Ti is more than or equal to the delta T valve, recording the number of times for 1 time and accumulating, and marking the accumulated number of times as N; and step 4, judging that the pipeline is broken when the number of continuous occurrences N is equal to an accumulated test threshold value Ni. The invention also provides an air conditioning system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a method and a device for monitoring pipeline breakage in operation of the air conditioning system.
Background
The pipeline of the air conditioning system is a refrigerant flowing channel, if the pipeline of the air conditioning system breaks during operation, the refrigerant can leak, so that the refrigerating/heating performance of the air conditioning system is reduced, the compressor is operated under poor conditions, and even the condition of damage of the compressor occurs during severe conditions, so that the normal operation of the air conditioning system is influenced; meanwhile, if the refrigerant has toxicity, the health of a user can be endangered; further, since the leaked refrigerant is in contact with the electrical components in operation, if the refrigerant has combustibility, fire and the like may be caused, and serious potential safety hazards are provided. However, there are many reasons for the breakage of the pipe in the operation of the air conditioning system, such as: the pressure fluctuation of the refrigerant of the air conditioning system in operation exceeds the pressure born by the pipeline; the operating stress strain of the pipeline exceeds the standard; the air conditioning system in operation is impacted by external objects, etc. Therefore, how to timely detect the pipeline breakage in the operation of the air conditioning system becomes a technical problem to be solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an air conditioning system and a method and a device for monitoring pipeline breakage in the running process of the air conditioning system, which can timely monitor the pipeline breakage in the running process of the air conditioning system.
The technical scheme adopted by the invention is that the method for monitoring the pipeline breakage in the operation of the air conditioning system comprises the following steps:
step 1, detecting an exhaust pressure Pi and an outer surface temperature Ti of the middle part of an evaporator copper pipe flow path every a preset time t after an air conditioning system is started and operated;
step 2, calculating the change amount delta Pi of the exhaust pressure and the change amount delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in the adjacent time interval;
step 3, comparing the change amount delta Pi of the exhaust pressure with a delta P threshold value, and simultaneously comparing the change amount delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path with a delta T threshold value; when the ΔPi is more than or equal to the ΔP threshold value and the ΔTi is more than or equal to the ΔT threshold value, the recording times are 1 time and accumulated, and the marking accumulated times are N; and
Step 4, judging that the pipeline is broken when the accumulated times N appearing continuously is equal to an accumulated test threshold value Ni; when the number of times N of continuous occurrence is smaller than the accumulated test threshold value Ni, the whole machine of the air conditioning system continuously runs and returns to the step 1 to continue detection.
The method for monitoring the pipeline breakage in the operation of the air conditioning system further comprises the following step 4: when it is determined that the pipeline is broken, the safety precaution is started immediately.
The safety protection measures comprise stopping operation and/or alarming of the whole machine of the air conditioning system and/or starting of the air exhaust device.
The invention also provides a device for monitoring pipeline breakage in the operation of an air conditioning system, which comprises:
the detection module is used for detecting an exhaust pressure Pi and an outer surface temperature Ti of the middle part of the evaporator copper pipe flow path every a preset time t after an air conditioning system is started and operated;
the calculation module is used for calculating the change amount delta Pi of the exhaust pressure and the change amount delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in the adjacent time interval; and
The judging module is used for comparing the change quantity delta Pi of the exhaust pressure with a delta P threshold value, comparing the change quantity delta Ti of the outer surface temperature of the middle part of the copper pipe flow path of the evaporator with a delta T threshold value, recording the number of times for 1 time and accumulating when the delta Pi is larger than or equal to the delta P threshold value and the delta Ti is larger than or equal to the delta T threshold value, marking the accumulated number of times for N, and judging that the pipeline breaks when the accumulated number of times N continuously appears and equals to an accumulated test threshold value Ni; when the number of times N of continuous occurrence is smaller than the accumulated test threshold value Ni, the whole machine of the air conditioning system continuously operates and continues to detect by using the detection module.
The device for monitoring the pipeline breakage in the running process of the air conditioning system further comprises a safety protection module, wherein the safety protection module is used for immediately starting safety protection measures for the air conditioner when the judging module judges that the pipeline is broken.
The safety protection measures comprise stopping operation and/or alarming of the whole machine of the air conditioning system and/or starting of the air exhaust device.
The invention also provides an air conditioning system which comprises the device for monitoring pipeline breakage.
The invention also provides an air conditioning system which uses the method for monitoring pipeline breakage.
Compared with the prior art, the invention has the beneficial effects that: the pipeline breakage in the operation of the air conditioner system can be monitored in real time, so that the pipeline breakage can be found in time, and adverse consequences caused by the pipeline breakage can be effectively avoided.
Drawings
FIG. 1 is a flow chart of a method for monitoring a pipe break in operation of an air conditioning system according to a first embodiment of the present invention;
fig. 2 is a functional block diagram of an apparatus for monitoring a pipe break in operation of an air conditioning system according to a second embodiment of the present invention.
Detailed Description
The invention will be described in detail with reference to the drawings and examples.
As shown in fig. 1, the method for monitoring pipeline breakage in the operation of the air conditioning system provided by the invention comprises the following steps:
s1: after an air conditioning system is started and operated, an exhaust pressure Pi and an evaporator copper pipe flow path middle outer surface temperature Ti are detected every a preset time t. It will be appreciated that when the air conditioning system is turned on, the compressor and the evaporator start to operate, so that the exhaust port of the compressor generates the exhaust pressure Pi, and the temperature Ti of the outer surface of the middle part of the copper pipe flow path of the evaporator starts to change. The predetermined time t is set by the manufacturer of the air conditioning system according to the actual situation of the air conditioning system (such as the number of pieces of air conditioning, fixed frequency or variable frequency).
S2: and calculating the change quantity delta Pi of the exhaust pressure and the change quantity delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in the adjacent time interval. Specifically, assuming that the predetermined time is 3 minutes, the air conditioning system starts to operate at 8:00, the exhaust pressure is measured to be P0 at 8:00, and the temperature of the outer surface of the middle part of the copper pipe flow path of the evaporator is T0; when the exhaust pressure is measured to be P1 at 8:03 and the temperature of the outer surface of the middle part of the copper pipe flow path of the evaporator is T1, Δp1=p1-P0 and Δt1=t1-T0.
S3: comparing the change amount delta Pi of the exhaust pressure with a delta P threshold value, and comparing the change amount delta Ti of the outer surface temperature of the middle part of the copper pipe flow path of the evaporator with a delta T threshold value to judge whether the change amount delta Pi is more than or equal to the delta P threshold value and the change amount delta Ti is more than or equal to the delta T threshold value are met at the same time; when the ΔPi is larger than or equal to the ΔP threshold value and the ΔTi is larger than or equal to the ΔT threshold value, the recording times are 1 time and accumulated, and the marking accumulated times are N. It can be understood that the Δp threshold and the Δt threshold are obtained by performing experimental tests and theoretical analysis by a developer during the research and development stage of the air conditioning system. If the pipeline is broken in the running process of the air conditioning system, the gas generated by the compressor leaks from the broken pipeline, so that the gas discharged from the exhaust port of the compressor is reduced, and the change amount delta Pi of the exhaust pressure of the compressor is increased; meanwhile, if a pipeline is broken in the running process of the air conditioning system, refrigerant leakage is caused, so that the refrigerating or heating effect of the air conditioning system is poor, and the temperature change quantity delta Ti of the middle outer surface of the evaporator copper pipe flow path is increased. Because the delta P threshold value and the delta T threshold value may have fluctuation in the use process of the air conditioning system, the judgment accuracy of the pipeline fracture can be effectively improved by recording the times of continuously appearing and simultaneously meeting the delta Pi not less than the delta P threshold value and the delta Ti not less than the delta T threshold value.
S4: when the accumulated times N appearing continuously is equal to an accumulated test threshold value Ni, judging that the pipeline is broken, and immediately starting a safety protection measure; when the number of times N of continuous occurrence is smaller than the accumulated test threshold value Ni, the whole machine of the air conditioning system continuously runs and returns to the step 1 to continue detection. It can be understood that the cumulative test threshold Ni is obtained by performing test and theoretical analysis by a developer during the research and development stage of the air conditioning system. The safety protection measures comprise stopping operation and/or alarming (at least one of audio frequency, video frequency, lamplight, graphics context and the like or a combination thereof) of the whole air conditioning system and/or starting the exhaust device, so that a user can timely and accurately know the fault of the air conditioning system, the damage caused by pipeline breakage is reduced to the minimum, various potential safety hazards are effectively eliminated, the operation safety of the air conditioning system is ensured, and the use satisfaction of the user is improved.
As shown in fig. 2, the present invention further provides an apparatus 100 for monitoring pipeline breakage in operation of an air conditioning system, for monitoring whether pipeline breakage occurs in operation of an air conditioning system. The air conditioning system includes a compressor and an evaporator copper tube. It will be appreciated that when the air conditioning system is started, the compressor and the evaporator of the air conditioning system are started, so that the exhaust port of the compressor generates exhaust pressure, and the temperature of the outer surface of the middle part of the copper pipe flow path of the evaporator is changed.
The device 100 for monitoring pipeline breakage in the operation of the air conditioning system comprises a detection module 10, a calculation module 20, a judgment module 30 and a safety protection module 40.
The detection module 10 is used for measuring an exhaust pressure and an evaporator copper pipe flow path middle outer surface temperature every a preset time t after the air conditioning system starts to operate. It is understood that the predetermined time is set by a manufacturer of the air conditioning system according to the actual situation of the air conditioning system (such as the number of pieces of the air conditioner, fixed frequency, variable frequency, etc.).
The calculation module 20 is used for calculating the change amount Δpi of the exhaust pressure and the change amount Δti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in adjacent time intervals. Assuming that the predetermined time interval is 3 minutes, the air conditioning system starts to operate at 8:00, the exhaust pressure is measured to be P0 at 8:00, and the temperature of the outer surface of the middle part of the evaporator copper pipe flow path is T0; when the exhaust pressure is measured to be P1 at 8:03 and the temperature of the outer surface of the middle part of the copper pipe flow path of the evaporator is T1, Δp1=p1-P0 and Δt1=t1-T0.
The judging module 30 is configured to compare the exhaust pressure change Δpi with a Δp threshold, and compare the temperature change Δti of the middle outer surface of the copper pipe of the evaporator with a Δt threshold, so as to judge whether Δpi is greater than or equal to the Δp threshold and Δti is greater than or equal to the Δt threshold are satisfied at the same time. When the delta Pi is more than or equal to the delta P threshold value and the delta Ti is more than or equal to the delta T threshold value, the recording times are 1 time and accumulated, the marking accumulated times are N, and when the accumulated times N of continuous occurrence are equal to an accumulated test threshold value Ni, the pipeline breakage is judged. When the number of continuous occurrences N is less than the cumulative test threshold value Ni, the complete machine of the air conditioning system continuously operates and continues to detect using the detection module 10.
It can be understood that the Δp threshold and the Δt threshold are obtained by performing experimental tests and theoretical analysis by a developer during the research and development stage of the air conditioning system. If the pipeline is broken in the running process of the air conditioning system, the gas generated by the compressor leaks out from the broken pipeline, so that the gas discharged from the exhaust port of the compressor is reduced, and the change amount delta Pi of the exhaust pressure is increased; meanwhile, if a pipeline is broken in the operation of the air conditioning system, refrigerant leakage is caused, so that the refrigerating or heating effect of the air conditioning system is poor, and the temperature change quantity delta Ti of the middle outer surface of the evaporator copper pipe flow path is increased.
It can be appreciated that, because the Δp threshold and the Δt threshold may fluctuate during the use of the air conditioning system, the accuracy of determining the pipeline breakage of the air conditioning system can be effectively improved by recording the number of times that the Δpi is greater than or equal to the Δp threshold and the Δti is greater than or equal to the Δt threshold are continuously met.
The safety protection module 40 is used for immediately starting safety protection measures for the air conditioner when the judging module 30 judges that the pipeline is broken. The safety protection measures comprise stopping operation and/or alarming (at least one of audio frequency, video frequency, lamplight, graphics context and the like or a combination thereof) of the whole air conditioning system and/or starting the exhaust device, so that a user can timely and accurately know the fault of the air conditioning system, the damage of the broken pipeline of the air conditioning system is minimized, various potential safety hazards are effectively eliminated, the operation safety of the air conditioning system is ensured, and the satisfaction degree of the user is improved.
The third embodiment of the present invention also provides an air conditioning system using the method for monitoring pipeline breakage in operation of the air conditioning system of the first embodiment of the present invention.
The fourth embodiment of the present invention also provides an air conditioning system including the apparatus 100 for monitoring a pipe break in operation of the air conditioning system according to the second embodiment of the present invention.
Compared with the prior art, the air conditioning system and the method and the device for monitoring the pipeline breakage in the operation of the air conditioning system can monitor whether the pipeline is broken in real time in the operation of the air conditioning system, so that the pipeline breakage can be found out in time, and adverse effects caused by the pipeline breakage can be effectively avoided.
It should be noted that the steps in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps shown or described may be performed in an order different than that herein.
The above examples are only for illustrating specific embodiments of the present invention. It should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit of the invention, and these modifications and variations should be considered to be within the scope of the invention.
Claims (8)
1. A method of monitoring for a pipe break in operation of an air conditioning system, comprising:
step 1, detecting an exhaust pressure Pi and an outer surface temperature Ti of the middle part of an evaporator copper pipe flow path every a preset time t after an air conditioning system is started and operated;
step 2, calculating the change amount delta Pi of the exhaust pressure and the change amount delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in the adjacent time interval;
step 3, comparing the change quantity delta Pi of the exhaust pressure with a delta P threshold value, simultaneously comparing the change quantity delta Ti of the outer surface temperature of the middle part of the copper pipe flow path of the evaporator with a delta T threshold value, and when the delta Pi is larger than or equal to the delta P threshold value and the delta Ti is larger than or equal to the delta T threshold value, recording the number of times for 1 time and accumulating, and marking the accumulated number of times for N; and
Step 4, judging that the pipeline is broken when the accumulated times N appearing continuously is equal to an accumulated test threshold value Ni; when the number of times N of continuous occurrence is smaller than the accumulated test threshold value Ni, the whole machine of the air conditioning system continuously runs and returns to the step 1 to continue detection.
2. The method of monitoring for a pipe break in operation of an air conditioning system of claim 1, wherein step 4 further comprises: when it is determined that the pipeline is broken, the safety precaution is started immediately.
3. A method of monitoring for a break in a pipe in operation of an air conditioning system according to claim 2, characterized in that the safety precautions comprise stopping the air conditioning system and/or alerting and/or activating the air exhaust.
4. An apparatus for monitoring pipeline breakage during operation of an air conditioning system, the apparatus comprising:
the detection module is used for detecting an exhaust pressure Pi and an outer surface temperature Ti of the middle part of the evaporator copper pipe flow path every a preset time t after an air conditioning system is started and operated;
the calculation module is used for calculating the change amount delta Pi of the exhaust pressure and the change amount delta Ti of the outer surface temperature of the middle part of the evaporator copper pipe flow path in the adjacent time interval; and
The judging module is used for comparing the change quantity delta Pi of the exhaust pressure with a delta P threshold value, simultaneously comparing the change quantity delta Ti of the outer surface temperature of the middle part of the copper pipe flow path of the evaporator with a delta T threshold value, when the change quantity delta Pi is more than or equal to the delta P threshold value and the change quantity delta Ti is more than or equal to the delta T threshold value, recording the number of times for 1 time and accumulating, marking the accumulated number of times as N, and judging that the pipeline breaks when the accumulated number of times N continuously appears and is equal to an accumulated test threshold value Ni; when the number of times N of continuous occurrence is smaller than the accumulated test threshold value Ni, the whole machine of the air conditioning system continuously operates and continues to detect by using the detection module.
5. The apparatus for monitoring pipeline breakage in operation of an air conditioning system according to claim 4, further comprising a safety protection module for immediately initiating a safety protection measure for the air conditioning system when the judging module judges that the pipeline is broken.
6. An arrangement for monitoring pipeline breakage in operation of an air conditioning system according to claim 5, characterized in that the safety protection measures comprise stopping the air conditioning system and/or warning and/or activating the air exhaust means.
7. An air conditioning system comprising a device for monitoring for a pipe break according to any one of claims 4-6.
8. An air conditioning system employing the method of monitoring for pipeline breakage as claimed in any one of claims 1 to 3.
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| CN201711014183.2A CN107575997B (en) | 2017-10-26 | 2017-10-26 | Air conditioning system and method and device for monitoring pipeline breakage in operation of air conditioning system |
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| CN201711014183.2A CN107575997B (en) | 2017-10-26 | 2017-10-26 | Air conditioning system and method and device for monitoring pipeline breakage in operation of air conditioning system |
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| CN107575997B true CN107575997B (en) | 2023-06-09 |
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| JP2000320936A (en) * | 1999-05-11 | 2000-11-24 | Bosch Automotive Systems Corp | Safety unit for refrigeration cycle |
| CN103925677B (en) * | 2014-04-30 | 2017-03-15 | 珠海格力电器股份有限公司 | Control method and device of air conditioner |
| CN105953354B (en) * | 2016-04-25 | 2018-09-07 | 广东美的暖通设备有限公司 | Multi-line system and its control method |
| CN106594973A (en) * | 2016-11-14 | 2017-04-26 | 珠海格力电器股份有限公司 | Method and device for detecting refrigerant of air conditioning system and air conditioner |
| CN106705384A (en) * | 2017-02-09 | 2017-05-24 | 美的集团股份有限公司 | Refrigerant leakage reminding method and device and air conditioner |
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