CN105864953A - Air conditioner throttling part blockage detection method and device and air conditioner - Google Patents
Air conditioner throttling part blockage detection method and device and air conditioner Download PDFInfo
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- CN105864953A CN105864953A CN201510032079.0A CN201510032079A CN105864953A CN 105864953 A CN105864953 A CN 105864953A CN 201510032079 A CN201510032079 A CN 201510032079A CN 105864953 A CN105864953 A CN 105864953A
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Abstract
The invention discloses an air conditioner throttling part blockage detection method and device and an air conditioner. The air conditioner throttling part blockage detection method comprises the steps that 1, when an air conditioner compressor stops, the air suction pressure and the exhaust pressure of the compressor are detected, and the first duration time from the moment when the compressor stops to the moment when the air suction pressure equals the exhaust pressure is calculated; 2, the first duration time is compared with the benchmark duration time; 3, if the ratio of the first duration time to the benchmark duration time is not smaller than the set ratio, an air conditioner throttling part is judged to be blocked; and 4, otherwise, the air conditioner throttling part is judged not to be blocked. By means of the air conditioner throttling part blockage detection method and device and the air conditioner, the technical purpose of timely and effectively detecting whether the throttling part is blocked or not can be achieved.
Description
Technical field
The present invention relates to air-conditioning technical field, specifically, relate to a kind of choke detecting method for air-conditioner throttling parts, device and air-conditioning.
Background technology
Capillary tube and electric expansion valve are the throttle part that existing air-conditioning is conventional, owing to the circulation area of these throttle parts is less, air-conditioning longtime running, easy dirty stifled, deposition lubricating oil, thus result in blockage.Throttle part blocking can cause a lot of problem, such as: cold medium flux reduces, and reduces refrigeration, heating effect；The high pressure of exhaust outlet of compressor raises, and delivery temperature raises, and works for a long time under high temperature and high pressure environment, affects compressor service life.
Therefore, the most in time, effectively detecting whether throttle part blocks is to avoid heat pump performance to decline and ensure the key issue in compressor service life, is also the technical problem to be solved in the present invention.
Summary of the invention
It is an object of the invention to provide a kind of choke detecting method for air-conditioner throttling parts and device, it is achieved in time, effectively detect whether throttle part occurs the technical purpose of blocking.
For achieving the above object, the choke detecting method of the air-conditioner throttling parts that the present invention provides uses following technical proposals to be achieved:
A kind of choke detecting method of air-conditioner throttling parts, described method includes:
When compressor of air conditioner is shut down, detect pressure of inspiration(Pi) and the pressure at expulsion of described compressor, calculate the first persistent period from moment equal with described pressure at expulsion in described compressor shutdown moment to described pressure of inspiration(Pi)；
Described first persistent period is made comparisons with reference duration；
If described first persistent period is not less than setting ratio with the ratio of described reference duration, it is determined that air-conditioner throttling block；Otherwise, it is judged that air-conditioner throttling parts are unplugged；
Wherein, the following Procedure Acquisition of described reference duration employing:
After described compressor normally works during power down first, detect pressure of inspiration(Pi) first and the pressure at expulsion first of described compressor, calculate from moment duration equal with described pressure at expulsion first in the described compressor moment of power down first to described pressure of inspiration(Pi) first, and this duration is set as described reference duration.
Preferably, the described ratio that sets is as 1.5.
Method as above, when judging air-conditioner throttling block, sends alarm.
Preferably, described alarm shows on the air-conditioner display panel and/or on air-conditioning remote control.
Method as above, described pressure of inspiration(Pi) is the pressure of described compressor air suction mouth, and described pressure at expulsion is the pressure of described exhaust outlet of compressor.
For realizing aforementioned invention purpose, the blockage detector of the air-conditioner throttling parts that the present invention provides uses following technical proposals to be achieved:
A kind of blockage detector of air-conditioner throttling parts, described device includes:
Pressure of inspiration(Pi) detector unit, for detecting the pressure of inspiration(Pi) of compressor of air conditioner；
Pressure at expulsion detector unit, for detecting the pressure at expulsion of described compressor；
First duration calculation unit, for calculating the persistent period to described pressure of inspiration(Pi) moment equal with described pressure at expulsion in the described compressor shutdown moment；
Persistent period compares unit, for being made comparisons with reference duration described first persistent period that described first duration calculation unit calculates；
Throttle part blocking identifying unit, sets ratio for being not less than at the ratio of described first persistent period with described reference duration, it is determined that air-conditioner throttling block；Otherwise, it is judged that air-conditioner throttling parts are unplugged；
Reference duration computing unit, for calculating the persistent period in the moment that the pressure of inspiration(Pi) first of the described compressor that the moment of power down first is detected is equal with the pressure at expulsion first of the described compressor that described pressure at expulsion detector unit is detected after described compressor normally works to described pressure of inspiration(Pi) detector unit.
Preferably, the described ratio that sets is as 1.5.
Device as above, described device also includes:
Alarm unit, for sending alarm when described throttle part blocking identifying unit judges air-conditioner throttling block.
Preferably, described alarm unit is the air-conditioner display panel and/or air-conditioning remote control.
Additionally, present invention also offers the air-conditioning of a kind of blockage detector with above-mentioned air-conditioner throttling parts.
Compared with prior art, advantages of the present invention and good effect be: the present invention is by pressure of inspiration(Pi) during detection compressor shutdown and pressure at expulsion, the relation utilizing the two pressure to reach to balance duration and reference duration judges whether throttle part blocks, whole judge process only needs measure two force value and calculate force value and time and judge, simple to operate, easily realize, judgment accuracy is high, and then realize whether air-conditioner throttling parts are blocked automatic, in time, accurately, effectively judge, reduce because not finding that throttling plugging affects the generation of the problem in heat pump performance and compressor life-span in time.
After reading in conjunction with the accompanying the detailed description of the invention of the present invention, the other features and advantages of the invention will become clearer from.
Accompanying drawing explanation
Fig. 1 is the flow chart of one embodiment of choke detecting method of air-conditioner throttling parts of the present invention；
Fig. 2 is the theory diagram of one embodiment of blockage detector of air-conditioner throttling parts of the present invention；
Fig. 3 is the structural representation of the air-conditioning of the blockage detector of application drawing 2.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below with reference to drawings and Examples, the present invention is described in further detail.
Referring to Fig. 1, this figure show the flow chart of one embodiment of choke detecting method of air-conditioner throttling parts of the present invention.In this embodiment, the capillary tube during air-conditioner throttling parts are air conditioner coolant blood circulation or expansion valve.
As it is shown in figure 1, the process that the present invention realizes throttle part jam detection comprises the steps:
Step 101: during compressor shutdown, the pressure of inspiration(Pi) of detection compressor and pressure at expulsion.
Compressor shutdown, refers to when air-conditioning is properly functioning, shuts down according to air-conditioning shutdown command power down.When compressor shutdown being detected, record this moment, start simultaneously at pressure of inspiration(Pi) and the pressure at expulsion of detection compressor.Specifically, utilize the pressure of inspiration(Pi) being arranged on the pressure transducer detection compressor at compressor air suction mouth, utilize the pressure at expulsion being arranged on the pressure transducer detection compressor at exhaust outlet of compressor, and constantly read pressure of inspiration(Pi) force value and exhaust pressure value.
Step 102: calculate duration in moment equal with pressure at expulsion from compressor shutdown moment to pressure of inspiration(Pi), as the first persistent period.
Step 101 constantly detects pressure of inspiration(Pi) and pressure at expulsion, and carries out the comparison of two force value, until pressure of inspiration(Pi) is equal with pressure at expulsion, and the moment that two force value of record are equal.Calculate two force value equal moment and duration between the moment of compressor shutdown that step 101 is recorded, using this time as the first persistent period.This first persistent period characterizes compressor and reaches to balance the required time from shutting down its pressure of inspiration(Pi) and pressure at expulsion, namely compressor reaches the time required for high-low pressure poised state from shutting down its air entry with air vent.
Step 103: calculate the ratio of the first persistent period and reference duration.
Wherein, reference duration is as a reference time judged, acquisition process is as follows: after compressor normally works during power down first, the pressure of inspiration(Pi) first of detection compressor and pressure at expulsion first, calculate from moment duration equal with pressure at expulsion first in the compressor moment of power down first to pressure of inspiration(Pi) first, this duration is set as reference duration, and stores.Specifically, compressor normally work after power down first, refer to when air-conditioning is properly functioning, compressor is shut down according to for the first time power down of air-conditioning shutdown command.After air-conditioning dispatches from the factory, throttle part is qualified, nonclogging, and therefore, when, compressor first power down properly functioning at air-conditioning is shut down, throttle part is typically also nonclogging.Now, compressor is also the shortest from shutting down the time reaching high-low pressure balance.Using this minimum length in time as reference duration, carry out the judgement whether throttle part blocks.That is, after step 102 calculated for the first persistent period, read the reference duration stored, calculate the ratio of the first persistent period and reference duration.
In this embodiment, said method is used to obtain reference duration for the air-conditioning of specific cooling cycle system, make the air conditioner cooling cycle system holding concordance that reference duration and the first persistent period hereafter obtained are based on, the error of the result of determination that minimizing causes because of cooling cycle system difference, improves the accuracy of jam detection.
Step 104: whether the ratio that determination step 103 calculates is less than setting ratio.If so, step 105 is performed；If it is not, perform step 106.
Setting ratio is the numerical value presetting and storing, and can be an empirical value or experiment value.Preferably, this sets ratio as 1.5.
Step 105: if ratio less than set ratio, show current compressor reach high-low pressure balance time shorter, then judge throttle part unplugged.
Step 106: if ratio not less than set ratio, show current compressor reach high-low pressure balance time longer, then judge throttle part blocking.
Step 107: when judging throttle part blocking, send alarm, to remind user to keep in repair or to change, it is to avoid the series of problems produced because of throttle part blocking.
Alarm the most on the air-conditioner display panel and/or on air-conditioning remote control display realize, it is of course also possible to point out by other means, as carried out auditory tone cues etc. by buzzer.And, on the air-conditioner display panel and/or when showing on air-conditioning remote control, can show to use failure code form or word description form.
Referring to Fig. 2, this figure show the theory diagram of one embodiment of blockage detector of air-conditioner throttling parts of the present invention.
As in figure 2 it is shown, functional unit, function that functional unit is realized and annexation each other that the blockage detector of this embodiment is comprised are specific as follows:
The blockage detector of this embodiment includes:
Pressure of inspiration(Pi) detector unit 21, for detecting the pressure of inspiration(Pi) of compressor of air conditioner.Preferably, pressure of inspiration(Pi) detector unit 21 is the press detection sensor being arranged on compressor air suction mouth.
Pressure at expulsion detector unit 22, for detecting the pressure at expulsion of compressor.Preferably, pressure at expulsion detector unit 22 is the press detection sensor being arranged on exhaust outlet of compressor.
First duration calculation unit 23, for calculating the persistent period to pressure of inspiration(Pi) moment equal with pressure at expulsion in the compressor shutdown moment.
Reference duration computing unit 24, for calculating, compressor normally work after persistent period in the pressure of inspiration(Pi) first of compressor that detected to pressure of inspiration(Pi) detector unit 21 of the moment of power down first moment equal with the pressure at expulsion first of the compressor that pressure at expulsion detector unit 22 is detected.
Persistent period compares unit 25, and the reference duration that the first persistent period for being calculated by the first duration calculation unit 23 calculates with reference duration computing unit 24 is made comparisons.
Throttle part blocking identifying unit 26, sets ratio for being not less than at the ratio of the first persistent period with reference duration, it is determined that air-conditioner throttling block；Otherwise, it is judged that air-conditioner throttling parts are unplugged.
Further, the device of this embodiment can also include:
Alarm unit 27, for sending alarm when throttle part blocking identifying unit 26 judges air-conditioner throttling block.
In the air-conditioning of the blockage detector application of this embodiment, run the software program corresponding to flow process with Fig. 1 embodiment, realize the automatic detection whether air-conditioner throttling parts are blocked according to the flow process of Fig. 1 embodiment.
The specific embodiment that Fig. 2 embodiment is applied in air-conditioning at blockage detector refers to Fig. 3, the structural representation of the air-conditioning of the blockage detector of application drawing 2 as illustrated in FIG. 3, air-conditioning includes compressor 10, expansion valve 20, outdoor controller 60 and indoor controller 70, compressor 10 electrically connects with outdoor controller 60, and outdoor controller 60 and indoor controller 70 electrically connect.Pressure of inspiration(Pi) force detection sensor 40 it is provided with at the air entry of compressor 10, exhaust ports at compressor 10 is provided with exhaust pressure force detection sensor 50, pressure of inspiration(Pi) force detection sensor 40 and exhaust pressure force detection sensor 50 and electrically connects with outdoor controller 70 respectively.Processor in outdoor controller 60 is integrated with the first duration calculation unit of Fig. 2 embodiment, reference duration computing unit, the persistent period compares unit, throttle part blocks identifying unit (the alarm unit of Fig. 2 embodiment is not shown).
By arranging in air-conditioning, there is the throttle part blockage detector of Fig. 2, it is possible to detect and determine the expansion valve 20 as throttle part in time, automatically, exactly and whether block, and can be given when blocking and remind timely.
Above example is only in order to illustrate technical scheme, rather than is limited；Although the present invention being described in detail with reference to previous embodiment, for the person of ordinary skill of the art, still the technical scheme described in previous embodiment can be modified, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of claimed technical solution of the invention.
Claims (10)
1. the choke detecting method of air-conditioner throttling parts, it is characterised in that described method includes:
When compressor of air conditioner is shut down, detect pressure of inspiration(Pi) and the pressure at expulsion of described compressor, calculate the first persistent period from moment equal with described pressure at expulsion in described compressor shutdown moment to described pressure of inspiration(Pi)；
Described first persistent period is made comparisons with reference duration；
If described first persistent period is not less than setting ratio with the ratio of described reference duration, it is determined that air-conditioner throttling block；Otherwise, it is judged that air-conditioner throttling parts are unplugged；
Wherein, the following Procedure Acquisition of described reference duration employing:
After described compressor normally works during power down first, detect pressure of inspiration(Pi) first and the pressure at expulsion first of described compressor, calculate from moment duration equal with described pressure at expulsion first in the described compressor moment of power down first to described pressure of inspiration(Pi) first, and this duration is set as described reference duration.
Method the most according to claim 1, it is characterised in that the described ratio that sets is as 1.5.
Method the most according to claim 1, it is characterised in that when judging air-conditioner throttling block, send alarm.
Method the most according to claim 3, it is characterised in that described alarm shows on the air-conditioner display panel and/or on air-conditioning remote control.
Method the most according to any one of claim 1 to 4, it is characterised in that described pressure of inspiration(Pi) is the pressure of described compressor air suction mouth, described pressure at expulsion is the pressure of described exhaust outlet of compressor.
6. the blockage detector of air-conditioner throttling parts, it is characterised in that described device includes:
Pressure of inspiration(Pi) detector unit, for detecting the pressure of inspiration(Pi) of compressor of air conditioner；
Pressure at expulsion detector unit, for detecting the pressure at expulsion of described compressor；
First duration calculation unit, for calculating the persistent period to described pressure of inspiration(Pi) moment equal with described pressure at expulsion in the described compressor shutdown moment；
Persistent period compares unit, for being made comparisons with reference duration described first persistent period that described first duration calculation unit calculates；
Throttle part blocking identifying unit, sets ratio for being not less than at the ratio of described first persistent period with described reference duration, it is determined that air-conditioner throttling block；Otherwise, it is judged that air-conditioner throttling parts are unplugged；
Reference duration computing unit, for calculating the persistent period in the moment that the pressure of inspiration(Pi) first of the described compressor that the moment of power down first is detected is equal with the pressure at expulsion first of the described compressor that described pressure at expulsion detector unit is detected after described compressor normally works to described pressure of inspiration(Pi) detector unit.
Device the most according to claim 6, it is characterised in that the described ratio that sets is as 1.5.
Device the most according to claim 6, it is characterised in that described device also includes:
Alarm unit, for sending alarm when described throttle part blocking identifying unit judges air-conditioner throttling block.
Device the most according to claim 8, it is characterised in that described alarm unit is the air-conditioner display panel and/or air-conditioning remote control.
10. an air-conditioning, including indoor set, off-premises station, compressor, throttle part, it is characterised in that described air-conditioning also has the blockage detector of the air-conditioner throttling parts according to any one of the claims 6 to 9.
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| CN201510032079.0A CN105864953A (en) | 2015-01-22 | 2015-01-22 | Air conditioner throttling part blockage detection method and device and air conditioner |
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| CN201510032079.0A CN105864953A (en) | 2015-01-22 | 2015-01-22 | Air conditioner throttling part blockage detection method and device and air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503911A (en) * | 2020-04-29 | 2020-08-07 | 四川虹美智能科技有限公司 | Detection method and detection device for refrigerant leakage in refrigeration system |
| CN112556090A (en) * | 2020-12-11 | 2021-03-26 | 四川长虹空调有限公司 | Method for detecting blockage of air conditioning system |
| CN113339944A (en) * | 2021-05-10 | 2021-09-03 | 广东Tcl智能暖通设备有限公司 | Air conditioning system blockage detection method and device, storage medium and air conditioning system |
| CN113531782A (en) * | 2021-07-09 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method for controlling self-cleaning outside pipe of indoor heat exchanger |
| CN115727576A (en) * | 2022-11-16 | 2023-03-03 | 宁波奥克斯电气股份有限公司 | Multi-capillary device and blockage cleaning control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737448A (en) * | 2005-06-20 | 2006-02-22 | 珠海格力电器股份有限公司 | Air conditioner capable of diagnosing failure of refrigerant shortage and system block and diagnosis method thereof |
| CN1906453A (en) * | 2004-01-21 | 2007-01-31 | 三菱电机株式会社 | Device diagnosis device, freezing cycle device, fluid circuit diagnosis method, device monitoring system, and freezing cycle monitoring system |
| CN102519119A (en) * | 2011-12-04 | 2012-06-27 | Tcl空调器(中山)有限公司 | Air conditioner with fault self-diagnosis function and fault self-diagnosis method thereof |
| CN103575514A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Air conditioner and detection method and device thereof |
| CN104101051A (en) * | 2014-06-24 | 2014-10-15 | 广东美的集团芜湖制冷设备有限公司 | Air conditioner and detection control method and device for abnormal coolant circulation of air conditioner |
| CN104110792A (en) * | 2014-05-30 | 2014-10-22 | 美的集团股份有限公司 | Control method and device for air conditioning system |
-
2015
- 2015-01-22 CN CN201510032079.0A patent/CN105864953A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1906453A (en) * | 2004-01-21 | 2007-01-31 | 三菱电机株式会社 | Device diagnosis device, freezing cycle device, fluid circuit diagnosis method, device monitoring system, and freezing cycle monitoring system |
| CN1737448A (en) * | 2005-06-20 | 2006-02-22 | 珠海格力电器股份有限公司 | Air conditioner capable of diagnosing failure of refrigerant shortage and system block and diagnosis method thereof |
| CN102519119A (en) * | 2011-12-04 | 2012-06-27 | Tcl空调器(中山)有限公司 | Air conditioner with fault self-diagnosis function and fault self-diagnosis method thereof |
| CN103575514A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Air conditioner and detection method and device thereof |
| CN104110792A (en) * | 2014-05-30 | 2014-10-22 | 美的集团股份有限公司 | Control method and device for air conditioning system |
| CN104101051A (en) * | 2014-06-24 | 2014-10-15 | 广东美的集团芜湖制冷设备有限公司 | Air conditioner and detection control method and device for abnormal coolant circulation of air conditioner |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503911A (en) * | 2020-04-29 | 2020-08-07 | 四川虹美智能科技有限公司 | Detection method and detection device for refrigerant leakage in refrigeration system |
| CN112556090A (en) * | 2020-12-11 | 2021-03-26 | 四川长虹空调有限公司 | Method for detecting blockage of air conditioning system |
| CN112556090B (en) * | 2020-12-11 | 2022-07-08 | 四川长虹空调有限公司 | Method for detecting blockage of air conditioning system |
| CN113339944A (en) * | 2021-05-10 | 2021-09-03 | 广东Tcl智能暖通设备有限公司 | Air conditioning system blockage detection method and device, storage medium and air conditioning system |
| CN113531782A (en) * | 2021-07-09 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method for controlling self-cleaning outside pipe of indoor heat exchanger |
| CN115727576A (en) * | 2022-11-16 | 2023-03-03 | 宁波奥克斯电气股份有限公司 | Multi-capillary device and blockage cleaning control method |
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