CN102967450B - Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely - Google Patents
Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely Download PDFInfo
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- CN102967450B CN102967450B CN201210404387.8A CN201210404387A CN102967450B CN 102967450 B CN102967450 B CN 102967450B CN 201210404387 A CN201210404387 A CN 201210404387A CN 102967450 B CN102967450 B CN 102967450B
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Abstract
The invention discloses a method for detecting whether an outdoor unit check valve of a split type air conditioning unit is installed reversely. The method mainly comprises the steps of firstly, finding out an outdoor unit where the outdoor unit check valve (1) is possibly installed reversely; if the temperature T2 in the middle of a coil of an outdoor unit heat exchanger (3) is larger than or equal to 25 DEG C, and the difference value between the gas discharging temperature T1 of the outdoor unit and the temperature T2 in the middle of the coil of the outdoor unit heat exchanger (3) is larger than or equal to 30 DEG C, performing finding continuously; if the average value delta T3 of temperatures at coil inlets of indoor heat exchangers (4) is smaller than or equal to 5 DEG C, performing finding continuously; if the difference value between the average value delta T5 of indoor temperatures and the average value delta T4 of temperatures in the middles of coils of the indoor heat exchangers (4) is larger than 0 DEG C and smaller than or equal to 4 DEG C, performing finding continuously; and if the difference value between the average value delta T5 of indoor temperatures and the average value delta T6 of temperatures at coil outlets of the indoor heat exchangers (4) is larger than 0 DEG C and smaller than or equal to 2 DEG C, judging the outdoor unit check valve (1) of the outdoor unit is installed reversely. The detection method is fast, convenient and efficient.
Description
Technical field
The present invention relates to VRF Air Conditioning System, is specifically the whether anti-loaded detection method of a kind of outer machine retaining valve of VRF Air Conditioning System.
Background technology
The VRF Air Conditioning System of prior art comprises multiple off-premises station parallel with one another, multiple indoor set parallel with one another and connects two refrigerant circulation house stewards of each indoor set and each off-premises station.Multiple off-premises stations after parallel connection are communicated with the multiple indoor sets after parallel connection by two refrigerant circulation house stewards.
Each off-premises station comprises compressor, oil separator, four-way change-over valve, outdoor heat exchanger when heating mode (during refrigeration mode be condenser and be evaporator), the retaining valve being parallel with outer organic electronic expansion valve and reservoir and gas-liquid separator.Compressor outlet is communicated with one end of oil separator, the other end of oil separator is communicated with the first valve port of four-way change-over valve, four-way change-over valve second valve port is communicated with outdoor heat exchanger one end, the outdoor heat exchanger other end is communicated with same one end of outer organic electronic expansion valve and retaining valve, outer organic electronic expansion valve and the other end of retaining valve are communicated with one end of reservoir, one that the other end and two refrigerants of reservoir circulate in house steward is communicated with, and another root refrigerant circulation house steward in two refrigerant circulation house stewards is communicated with four-way change-over valve the 3rd valve port of each off-premises station, four-way change-over valve the 4th valve port is communicated with one end of gas-liquid separator, the other end of gas-liquid separator is communicated with suction port of compressor.
Each indoor set comprises interior organic electronic expansion valve and indoor heat exchanger while heating (during refrigeration mode be evaporator be condenser), one end of indoor heat exchanger is communicated with one end of interior organic electronic expansion valve, one that the other end and two refrigerants of interior organic electronic expansion valve circulate in house steward is communicated with, and the house steward that circulates is communicated with for the other end and two refrigerants another root refrigerant circulated in house steward of indoor heat exchanger.
During refrigeration mode, first valve port of four-way change-over valve is communicated with the second valve port, 3rd valve port is communicated with the 4th valve port, namely refrigerant is along compressor, outdoor heat exchanger, indoor heat exchanger, the circulation of this route of compressor, and the flow direction of refrigerant is identical with the direction of retaining valve during refrigeration mode, therefore the refrigerant of refrigeration mode directly flows through retaining valve and without the outer organic electronic expansion valve in parallel with retaining valve, refrigerant is throttling in organic electronic expansion valve in indoor set.During heating mode, first valve port of four-way change-over valve is communicated with the 3rd valve port, second valve port is communicated with the 4th valve port, refrigerant is along compressor, indoor heat exchanger, outdoor heat exchanger, this line cycle of compressor, and refrigerant during heating mode flows to contrary with retaining valve direction, therefore refrigerant flows through the outer organic electronic expansion valve in parallel with retaining valve and throttling without retaining valve.
The outlet of the compressor of off-premises station is provided with measures discharge pressure P
1the first pressure transducer, the entrance of the compressor of off-premises station is provided with measures pressure of inspiration(Pi) P
2the second pressure transducer, the outlet of compressor is provided with measures delivery temperature T
1the first temperature inductor, be provided with the coil pipe middle portion temperature T of measuring chamber external heat exchanger in the middle part of the coil pipe of the outdoor heat exchanger of off-premises station
2the second temperature inductor, the coil inlet of the indoor heat exchanger of indoor set is provided with the coil inlet temperature T measuring indoor heat exchanger
3the 3rd temperature inductor, be provided with in the middle part of the coil pipe of indoor heat exchanger and measure the coil pipe middle portion temperature T of indoor heat exchanger
4the 4th temperature inductor, indoor set be provided with measure indoor temperature T
5the 5th temperature inductor, the coil outlets of indoor heat exchanger is provided with the Coil outlet temperature T measuring indoor heat exchanger
6the 6th temperature inductor.Each above-mentioned temperature inductor and pressure transducer are all electrically connected with the master controller of air-conditioning.
When VRF Air Conditioning System installs post debugging operation at the scene, frequent meeting is at compressor outlet report high voltage fault, suction port of compressor report low voltage failure, and cause the reason of above-mentioned fault a lot, as anti-in retaining valve weldering, the pipeline weldering of air-conditioner set is stifled, the amount that refrigerant adds is too much or not enough, and retaining valve weldering counter be possible of the maximum probability of causing trouble, but because retaining valve welds with pipeline, weld part can only be cut open could detect retaining valve and whether weld instead, cutting process is wasted time and energy, and weldering is not anti-once cut discovery, then lose more than gain, therefore prior art can only by manually progressively investigating the various piece of whole system, through a series of loaded down with trivial details investigation, eliminate other fault, just can be confirmed to be retaining valve weldering anti-, finally cut and again weld, therefore the detection method efficiency of prior art is low, speed is slow, testing process bothers.
Summary of the invention
The technical problem to be solved in the present invention is, provides the detection method whether a kind of outer machine retaining valve that is quick, convenient, VRF Air Conditioning System efficiently is anti-loaded.
Technical solution of the present invention is, provide the detection method whether a kind of outer machine retaining valve of VRF Air Conditioning System is anti-loaded, its concrete steps are as follows:
A, VRF Air Conditioning System is adjusted to refrigeration mode, and the start of the compressor of off-premises station is run a period of time;
The discharge pressure P of the compressor outlet of each off-premises station that b, detection are running
1, compressor outlet delivery temperature T
1, and detect the pressure of inspiration(Pi) P of the suction port of compressor of each off-premises station
2if find that there is the delivery temperature T of compressor outlet
1>=95 DEG C and pressure of inspiration(Pi) P
2≤ 0.3MPa, or the delivery temperature T finding that there is compressor outlet
1>=95 DEG C and discharge pressure P
1>=4MPa, then enter next step, if do not meet the condition of this step, judges that outer machine retaining valve is not anti-loaded;
The coil pipe middle portion temperature T of the outdoor heat exchanger of the off-premises station that c, detection outer machine retaining valve possibility are anti-loaded
2, and judge, if meet the coil pipe middle portion temperature T of outdoor heat exchanger
2>=50 DEG C and the delivery temperature T of compressor outlet
1deduct the coil pipe middle portion temperature T of outdoor heat exchanger
2difference>=30 DEG C, then enter next step, if do not meet the condition of this step, judge that outer machine retaining valve is not anti-loaded;
The coil inlet temperature T of the indoor heat exchanger of each indoor set that d, measurement are running
3, then calculate the mean value △ T of coil inlet temperature of each indoor heat exchanger
3, and judge, if the mean value △ T of the coil inlet temperature of each indoor heat exchanger
3≤ 5 DEG C, then enter next step, if do not meet the condition of this step, judge that outer machine retaining valve is not anti-loaded;
E, judge in the aperture of organic electronic expansion valve whether between 200 ~ 400 steps, if be positioned at this interval, enter next step, if do not meet the condition of this step, judge that outer machine retaining valve is not anti-loaded;
The coil pipe middle portion temperature T of the indoor heat exchanger of whole indoor sets that f, measurement are running
4with indoor temperature T
5, and calculate the mean value △ T of the coil pipe middle portion temperature of indoor heat exchanger
4with the mean value △ T of indoor temperature
5, then judge, if the mean value △ T of indoor temperature
5deduct the mean value △ T of the coil pipe middle portion temperature of indoor heat exchanger
4difference be greater than 0 DEG C and these difference≤4 DEG C, then enter next step, if do not meet the condition of this step, then judge outer machine retaining valve not anti-loaded;
The Coil outlet temperature T of the indoor heat exchanger of whole indoor sets that g, measurement are running
6, and calculate the mean value △ T of the Coil outlet temperature of each indoor heat exchanger
6, then judge, if the mean value △ T of indoor temperature
5deduct the mean value △ T of the Coil outlet temperature of indoor heat exchanger
6difference be greater than 0 DEG C and these difference≤2 DEG C, then judge that the outer machine retaining valve of this off-premises station is anti-loaded, if do not meet the condition of this step, then judge outer machine retaining valve not anti-loaded.
Adopt above method, the whether anti-loaded detection method of the outer machine retaining valve of VRF Air Conditioning System of the present invention compared with prior art, has the following advantages:
Adopt above method, can at short notice as quick in 10 clocks, accurately, whether direct machine retaining valve of must going out welds anti-conclusion, speed is fast, efficiency is high, measurement result is accurate, and, above method make use of each temperature inductor existing and pressure transducer and master controller in VRF Air Conditioning System completely and realizes, do not increase any parts in addition, the manufacturing cost of air-conditioner set can not be increased, in addition, the method utilizes VRF Air Conditioning System to detect voluntarily completely, without the need to relying on artificial investigation as prior art, more detect without the need to cutting weld part open, therefore testing process is convenient.
As improvement, a period of time described in step a refers to more than 5 minutes, and namely compressor operating starts after 5 minutes to detect, and is proved by test, and run after 5 minutes and regulate relatively accurately, too early detect, fault is not obvious.
As improving again, a period of time described in step a refers to 5 minutes, namely compressor operating 5 minutes these time points start to detect, proved by repetition test, within 5 minutes, this time point is the most accurate, and too early detect, situation is not obvious, Detection results is bad, and the anti-loaded high voltage fault caused of the words retaining valve regulated too late causes harmful effect.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of the whether anti-loaded detection method of the outer machine retaining valve of VRF Air Conditioning System of the present invention.
Shown in figure 1, outer machine retaining valve, 2, compressor, 3, outdoor heat exchanger, 4, indoor heat exchanger.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the detection method whether outer machine retaining valve of VRF Air Conditioning System of the present invention is anti-loaded, its concrete steps are as follows.
A, VRF Air Conditioning System is adjusted to refrigeration mode, and the compressor 2 of off-premises station is started shooting runs a period of time; A period of time refers to more than 5 minutes, preferably 5 minutes.
The discharge pressure P that b, the compressor 2 detecting each off-premises station run export
1, compressor 2 export delivery temperature T
1, and detect the pressure of inspiration(Pi) P of compressor 2 entrance of each off-premises station
2if find that there is the delivery temperature T that compressor 2 exports
1>=95 DEG C and pressure of inspiration(Pi) P
2≤ 0.3MPa, or the delivery temperature T finding that there is compressor 2 outlet
1>=95 DEG C and discharge pressure P
1>=4MPa, then enter next step, if do not meet the condition of this step, judges that outer machine retaining valve 1 is not anti-loaded; In particular, Rule of judgment has two, and condition 1 is the delivery temperature T that compressor 2 exports
1>=95 DEG C and pressure of inspiration(Pi) P
2≤ 0.3MPa, condition 2 is the delivery temperature T that compressor 2 exports
1>=95 DEG C and discharge pressure P
1>=4MPa, outer machine retaining valve 1 possibility of the off-premises station meeting two conditions simultaneously or only meet one of two conditions is anti-loaded, therefore enters next step, if do not meet any one condition, then judges that outer machine retaining valve 1 is not anti-loaded.
The coil pipe middle portion temperature T of the outdoor heat exchanger 3 of the off-premises station that c, detection outer machine retaining valve 1 possibility are anti-loaded
2, and judge, if meet the coil pipe middle portion temperature T of outdoor heat exchanger 3
2>=50 DEG C and retaining valve 1 may be anti-loaded the delivery temperature T that exports of compressor 2
1deduct the coil pipe middle portion temperature T of outdoor heat exchanger 3
2difference>=30 DEG C, then enter next step, if do not meet the condition of this step, judge that outer machine retaining valve 1 is not anti-loaded.
The coil inlet temperature T of the indoor heat exchanger 4 of each indoor set that d, measurement are running
3, then calculate the mean value △ T of coil inlet temperature of each indoor heat exchanger 4 run
3, and judge, if the mean value △ T of the coil inlet temperature of each indoor heat exchanger 4
3≤ 5 DEG C, then enter next step, if do not meet the condition of this step, judge that outer machine retaining valve 1 is not anti-loaded.
E, judge in the aperture of organic electronic expansion valve whether between 200 ~ 400 steps, if be positioned at this interval, enter next step, if do not meet the condition of this step, judge that outer machine retaining valve 1 is not anti-loaded.
The coil pipe middle portion temperature T of the indoor heat exchanger 4 of whole indoor sets that f, measurement are running
4with indoor temperature T
5, and calculate the mean value △ T of the coil pipe middle portion temperature of each indoor heat exchanger 4 run
4the mean value △ T of the indoor temperature in each room, indoor set place run
5, then judge, if the mean value △ T of indoor temperature
5deduct the mean value △ T of the coil pipe middle portion temperature of indoor heat exchanger 4
4difference be greater than 0 DEG C and these difference≤4 DEG C, then enter next step, if do not meet the condition of this step, then judge outer machine retaining valve 1 not anti-loaded.
The Coil outlet temperature T of the indoor heat exchanger 4 of whole indoor sets that g, measurement are running
6, and calculate the mean value △ T of the Coil outlet temperature of each indoor heat exchanger 4 run
6, then judge, if the mean value △ T of indoor temperature
5deduct the mean value △ T of the Coil outlet temperature of indoor heat exchanger 4
6difference be greater than 0 DEG C and these difference≤2 DEG C, then judge that the outer machine retaining valve 1 of this off-premises station is anti-loaded, if do not meet the condition of this step, then judge outer machine retaining valve 1 not anti-loaded.
Claims (3)
1. the detection method that whether the outer machine retaining valve of VRF Air Conditioning System is anti-loaded, is characterized in that: its concrete steps are as follows:
A, VRF Air Conditioning System is adjusted to refrigeration mode, and the start of the compressor (2) of off-premises station is run a period of time;
The discharge pressure P that b, the compressor (2) detecting each off-premises station run export
1, the delivery temperature T that exports of compressor (2)
1, and detect the pressure of inspiration(Pi) P of compressor (2) entrance of each off-premises station
2, judge, if find that there is the delivery temperature T that compressor (2) exports
1>=95 DEG C and pressure of inspiration(Pi) P
2≤ 0.3MPa, or the delivery temperature T finding that there is that compressor (2) exports
1>=95 DEG C and discharge pressure P
1>=4MPa, then enter next step, if do not meet the condition of this step, judges that outer machine retaining valve (1) is not anti-loaded;
The coil pipe middle portion temperature T of the outdoor heat exchanger (3) of the off-premises station that c, detection outer machine retaining valve (1) possibility are anti-loaded
2, and judge, if meet the coil pipe middle portion temperature T of outdoor heat exchanger (3)
2the delivery temperature T that>=50 DEG C and compressor (2) export
1deduct the coil pipe middle portion temperature T of outdoor heat exchanger (3)
2difference>=30 DEG C, then enter next step, if do not meet the condition of this step, judge that outer machine retaining valve (1) is not anti-loaded;
The coil inlet temperature T of the indoor heat exchanger (4) of each indoor set that d, measurement are running
3, then calculate the mean value △ T of coil inlet temperature of each indoor heat exchanger (4)
3, and judge, if the mean value △ T of the coil inlet temperature of each indoor heat exchanger (4)
3≤ 5 DEG C, then enter next step, if do not meet the condition of this step, judge that outer machine retaining valve (1) is not anti-loaded;
E, judge in the aperture of organic electronic expansion valve whether between 200 ~ 400 steps, if be positioned at this interval, enter next step, if do not meet the condition of this step, judge that outer machine retaining valve (1) is not anti-loaded;
The coil pipe middle portion temperature T of the indoor heat exchanger (4) of whole indoor sets that f, measurement are running
4with indoor temperature T
5, and calculate the mean value △ T of the coil pipe middle portion temperature of indoor heat exchanger (4)
4with the mean value △ T of indoor temperature
5, then judge, if the mean value △ T of indoor temperature
5deduct the mean value △ T of the coil pipe middle portion temperature of indoor heat exchanger (4)
4difference be greater than 0 DEG C and these difference≤4 DEG C, then enter next step, if do not meet the condition of this step, then judge outer machine retaining valve (1) not anti-loaded;
The Coil outlet temperature T of the indoor heat exchanger (4) of whole indoor sets that g, measurement are running
6, and calculate the mean value △ T of the Coil outlet temperature of each indoor heat exchanger (4)
6, then judge, if the mean value △ T of indoor temperature
5deduct the mean value △ T of the Coil outlet temperature of indoor heat exchanger (4)
6difference be greater than 0 DEG C and these difference≤2 DEG C, then judge that the outer machine retaining valve (1) of this off-premises station is anti-loaded, if do not meet the condition of this step, then judge outer machine retaining valve (1) not anti-loaded.
2. the detection method that whether the outer machine retaining valve of VRF Air Conditioning System according to claim 1 is anti-loaded, is characterized in that: a period of time described in step a refers to more than 5 minutes.
3. the detection method that whether the outer machine retaining valve of VRF Air Conditioning System according to claim 2 is anti-loaded, is characterized in that: a period of time described in step a refers to 5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210404387.8A CN102967450B (en) | 2012-10-23 | 2012-10-23 | Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely |
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| CN201210404387.8A CN102967450B (en) | 2012-10-23 | 2012-10-23 | Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely |
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| CN102967450B true CN102967450B (en) | 2015-04-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595568B (en) * | 2014-12-25 | 2017-11-21 | 珠海格力电器股份有限公司 | The detection method and device of air-conditioning water valve |
| CN105083312B (en) * | 2015-07-02 | 2017-08-25 | 石家庄国祥运输设备有限公司 | A kind of method of prevention railway vehicle air conditioner system compressors low voltage failure |
| CN107560073B (en) * | 2017-08-30 | 2020-06-30 | 青岛海尔空调器有限总公司 | Air conditioner and fault detection and processing method of supercooling pipe set of air conditioner |
| CN107747789B (en) * | 2017-08-30 | 2019-11-05 | 青岛海尔空调器有限总公司 | The fault detection and processing method of air-conditioning and its supercooling tube group |
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| CN1193105A (en) * | 1997-03-12 | 1998-09-16 | 三星电子株式会社 | Device for testing property of outdoor unit of air-conditioner |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |