CN105526676A - Method for judging whether liquid is accumulated in indoor heat exchangers of multi-connected units in heating process - Google Patents
Method for judging whether liquid is accumulated in indoor heat exchangers of multi-connected units in heating process Download PDFInfo
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- CN105526676A CN105526676A CN201510980955.2A CN201510980955A CN105526676A CN 105526676 A CN105526676 A CN 105526676A CN 201510980955 A CN201510980955 A CN 201510980955A CN 105526676 A CN105526676 A CN 105526676A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method for judging whether liquid is accumulated in indoor heat exchangers of multi-connected units in the heating process. The method is characterized by comprising the steps of sequentially detecting each started indoor unit, judging whether each started indoor unit meets the condition that the inlet temperature Te1 of coils of started indoor units minus the outlet temperature Te2 of the coils of the started indoor units is greater than or equal to 30 DEG C and the condition that the middle temperature Tem of the coils of the started indoor units minus the outlet temperature Te2 of the coils of the started indoor units is greater than or equal to 10 DEG C, judging that the liquid is accumulated in the started indoor units if the two conditions are both met and judging that the liquid is not accumulated in the started indoor units if the two conditions are not both met. The method is fast, convenient and accurate.
Description
Technical field
The present invention relates to VRF Air Conditioning System, is specifically the method for the indoor heat exchanger whether hydrops of a kind of judgement multi-connected machine when heating.
Background technology
The VRF Air Conditioning System of prior art is called for short multi-connected machine, and it comprises off-premises station and multiple indoor set parallel with one another and the two refrigerant circulation house stewards being connected each indoor set and off-premises station.Off-premises station is communicated with the multiple indoor sets after parallel connection by two refrigerant circulation house stewards.
Off-premises station comprises compressor, oil eliminator, four-way change-over valve, outdoor heat exchanger while heating (during refrigeration be condenser be evaporimeter), outer organic electronic expansion valve, reservoir and gas-liquid separator.Compressor outlet is communicated with the entrance of oil eliminator, the outlet of oil eliminator 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 one end of outer organic electronic expansion valve, the outer other end of organic electronic expansion valve is 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 off-premises station, four-way change-over valve the 4th valve port is connected with the entrance of gas-liquid separator, the outlet 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 be evaporimeter 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 heating mode, the first valve port of four-way change-over valve is communicated with the 3rd valve port, and the second valve port is communicated with the 4th valve port, and refrigerant is along compressor, indoor heat exchanger, outdoor heat exchanger, the circulation of this route of compressor.
Because the factor such as model, exchange capability of heat, fan operation rotating speed, heating needs of multiple indoor sets of this unit parallel connection is all not identical, like this, in actual motion, often easily occur the situation of the hypervolia of refrigerant after the indoor set heat exchange of start, and this part unnecessary refrigerant deposit can be got up by the reservoir of prior art, but along with the fieriness day by day of air-conditioning market competition, producer to cost control to the degree of haggling over every penny, in order to reduce cost, a lot of producer directly eliminates reservoir, like this, when in system, liquid refrigerants is too much, for preventing liquid hammer compressor, the aperture of outer organic electronic expansion valve can only turn down, like this, this part liquid refrigerants will along the reverse accumulation of pipeline, finally slowly accumulate in the indoor heat exchanger of indoor set, namely there is indoor heat exchanger hydrops, once there is this situation, refrigerant flow rate can be caused slow, indoor set heating effect is deteriorated, even compressor outlet place report high voltage fault.The detection means of prior art lacks the method that can judge indoor heat exchanger whether hydrops rapidly and accurately.
Summary of the invention
The technical problem to be solved in the present invention is, provides the method for the efficient and convenient indoor heat exchanger judging multi-connected machine when heating exactly of a kind of energy whether hydrops.
Technical solution of the present invention is, a kind of method of the indoor heat exchanger of multi-connected machine whether hydrops when providing judgement to heat, and its concrete steps are as follows:
Run under a, heating mode;
If indoor set is all started shooting, judge whether to meet following two conditions: the saturation temperature that 1, pressure at expulsion is corresponding is in the scope of 50 DEG C ~ 53 DEG C simultaneously; 2, the coil pipe middle portion temperature Tem of the indoor set of start is in the scope of 40 DEG C ~ 43 DEG C; As met simultaneously, then enter step b, if asynchronously met, then exit judgement;
If indoor set part is started shooting, judge whether to meet following three conditions: the saturation temperature that 1, pressure at expulsion is corresponding is in the scope of 50 DEG C ~ 53 DEG C simultaneously; 2, the coil pipe middle portion temperature Tem of the indoor set of start is in the scope of 40 DEG C ~ 43 DEG C; The coil pipe middle portion temperature Tem of the indoor set of 3, not starting shooting is in the scope of 45 DEG C ~ 48 DEG C; As met simultaneously, then enter step b, if asynchronously met, then exit judgement;
B, one by one the indoor set of each start to be detected, judge whether the indoor set that every platform start shooting meets following two conditions simultaneously: the Coil outlet temperature Te2 that the coil inlet temperature Te1 of the indoor set of 1, starting shooting deducts the indoor set of this start is more than or equal to 30 DEG C; 2, the Coil outlet temperature Te2 that the coil pipe middle portion temperature Tem of indoor set of start deducts the indoor set of this start is more than or equal to 10 DEG C; If meet above-mentioned condition simultaneously, then judge the inner hydrops of the indoor set of this start; If asynchronously met, then judge not hydrops.
The principle of this decision method is: first, the saturation temperature that the pressure at expulsion of compressor is corresponding, the coil pipe middle portion temperature of start is all normal, and the coil pipe middle portion temperature of the not starting shooting several years slightly higher than the coil pipe middle portion temperature of start, at least illustrate that compressor normally works, pipeline does not block substantially, refrigerant can normally arrive each indoor heat exchanger, if now hydrops in indoor heat exchanger, refrigerant flow rate in the coil pipe of then indoor heat exchanger is slow, and the blower fan of each indoor set is in normal work, therefore heat exchange amount is larger, when flowing in indoor heat exchanger, refrigerant temperature declines very fast, so, once find the temperature difference between the import of the coil pipe of indoor set and outlet and the excessive temperature differentials between middle part and outlet temperature, then judge the inner hydrops of this indoor set.
Adopt above method, the indoor heat exchanger that the present invention judges multi-connected machine when heating whether hydrops method compared with prior art, have the following advantages:
By the method, efficient and conveniently can judge this indoor set inside whether hydrops exactly, solve the technical barrier of objective reality always in industry.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of the indoor heat exchanger whether method of hydrops of the present invention's multi-connected machine when judging to heat.
Shown in figure 1, indoor fan, 2, interior organic electronic expansion valve, 3, compressor, 4, indoor heat exchanger.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the method for the indoor heat exchanger that the present invention judges multi-connected machine when heating whether hydrops, its concrete steps are as follows.
Run under a, heating mode.
First emphasize a concept, indoor set is started shooting, and refer to, the indoor fan 1 of indoor set is started shooting, and the interior organic electronic expansion valve 2 of indoor set is also opened, and indoor set shuts down, and refer to that the indoor fan 1 of indoor set shuts down, and interior organic electronic expansion valve 2 is still normally opened.
If indoor set is all started shooting, judge whether to meet following two conditions: the saturation temperature that 1, pressure at expulsion is corresponding is in the scope of 50 DEG C ~ 53 DEG C simultaneously; 2, the coil pipe middle portion temperature Tem of the indoor set of start is in the scope of 40 DEG C ~ 43 DEG C; As met simultaneously, then enter step b, if asynchronously met, then exit judgement, and judge not hydrops.At compressor 3 exhaust outlet, a pressure sensor is set to record pressure at expulsion, more just can obtains saturation temperature corresponding to this pressure by pressure at expulsion.
If indoor set part is started shooting, judge whether to meet following three conditions: the saturation temperature that 1, pressure at expulsion is corresponding is in the scope of 50 DEG C ~ 53 DEG C simultaneously; 2, the coil pipe middle portion temperature Tem of the indoor set of start is in the scope of 40 DEG C ~ 43 DEG C; The coil pipe middle portion temperature Tem of the indoor set of 3, not starting shooting is in the scope of 45 DEG C ~ 48 DEG C; As met simultaneously, then enter step b, if asynchronously met, then exit judgement, and judge not hydrops.
B, one by one the indoor set of each start to be detected, judge whether the indoor set that every platform start shooting meets following two conditions simultaneously: the Coil outlet temperature Te2 that the coil inlet temperature Te1 of the indoor set of 1, starting shooting deducts same indoor set of this start is more than or equal to 30 DEG C; 2, the Coil outlet temperature Te2 that the coil pipe middle portion temperature Tem of indoor set of start deducts same indoor set of this start is more than or equal to 10 DEG C; If meet above-mentioned condition simultaneously, then judge the inner hydrops of the indoor set of this start; If asynchronously met, then judge not hydrops.
In the entrance of the coil pipe of the indoor heat exchanger 4 of indoor set, middle part, outlet, three temperature sensors are set, to record coil inlet temperature Te1, coil pipe middle portion temperature Tem and Coil outlet temperature Te2 respectively.
Claims (1)
1. a method for the indoor heat exchanger of multi-connected machine whether hydrops when judgement heats, is characterized in that: its concrete steps are as follows:
Run under a, heating mode;
If indoor set is all started shooting, judge whether to meet following two conditions: 1), saturation temperature corresponding to pressure at expulsion be in the scope of 50 DEG C ~ 53 DEG C simultaneously; 2), the coil pipe middle portion temperature Tem of the indoor set of start is in the scope of 40 DEG C ~ 43 DEG C; As met simultaneously, then enter step b, if asynchronously met, then exit judgement;
If the start of indoor set part, judge whether to meet following three conditions: 1), saturation temperature corresponding to pressure at expulsion be in the scope of 50 DEG C ~ 53 DEG C simultaneously; 2), the coil pipe middle portion temperature Tem of the indoor set of start is in the scope of 40 DEG C ~ 43 DEG C; 3) the coil pipe middle portion temperature Tem of the indoor set of, not starting shooting is in the scope of 45 DEG C ~ 48 DEG C; As met simultaneously, then enter step b, if asynchronously met, then exit judgement;
B, one by one the indoor set of each start to be detected, judge whether the indoor set that every platform start shooting meets following two conditions simultaneously: 1), the coil inlet temperature Te1 of indoor set that the starts shooting Coil outlet temperature Te2 that deducts the indoor set of this start is more than or equal to 30 DEG C; 2) the Coil outlet temperature Te2 that, the coil pipe middle portion temperature Tem of indoor set of start deducts the indoor set of this start is more than or equal to 10 DEG C; If meet above-mentioned condition simultaneously, then judge the inner hydrops of the indoor set of this start; If asynchronously met, then judge not hydrops.
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| CN201510980955.2A CN105526676B (en) | 2015-12-23 | 2015-12-23 | Judge heating when multi-connected machine indoor heat exchanger whether the method for hydrops |
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| CN201510980955.2A CN105526676B (en) | 2015-12-23 | 2015-12-23 | Judge heating when multi-connected machine indoor heat exchanger whether the method for hydrops |
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| CN105526676B CN105526676B (en) | 2018-07-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403201A (en) * | 2016-11-10 | 2017-02-15 | 广东美的暖通设备有限公司 | Control method for accumulating liquid of fresh air ventilator heat exchanger of air conditioner and air conditioner |
| CN106545958A (en) * | 2016-10-11 | 2017-03-29 | 广东美的暖通设备有限公司 | The decision method that multiple on-line system and its indoor set refrigerating capacity are not enough |
| CN107036243A (en) * | 2017-04-24 | 2017-08-11 | 广东美的暖通设备有限公司 | Indoor set points out control method and system, indoor set, multi-connected machine central air-conditioning |
| CN111023261A (en) * | 2019-12-17 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Method and device for reducing on-line noise of multi-connected unit and multi-connected unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08313125A (en) * | 1995-05-23 | 1996-11-29 | Sanyo Electric Co Ltd | Abnormally detecting method of pressure sensor and temperature sensor in refrigerating device |
| JP2004132610A (en) * | 2002-10-10 | 2004-04-30 | Mitsubishi Electric Corp | Heating system and dwelling house with heating system |
| CN102261719A (en) * | 2011-05-25 | 2011-11-30 | 宁波奥克斯电气有限公司 | Control method for starting heating mode of screw-type compressed multi-connected central air conditioner |
| CN102914027A (en) * | 2012-09-20 | 2013-02-06 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant of outdoor unit from bias flowing during refrigeration of multi-split air-conditioning unit |
| CN103075774A (en) * | 2013-01-09 | 2013-05-01 | 合肥天鹅制冷科技有限公司 | Combined air handling unit driven by total heat recovery type heat pump |
| CN103791587A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Method for judging whether resistance values of temperature sensors of multi-union air conditioner of heating mode deviate |
-
2015
- 2015-12-23 CN CN201510980955.2A patent/CN105526676B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08313125A (en) * | 1995-05-23 | 1996-11-29 | Sanyo Electric Co Ltd | Abnormally detecting method of pressure sensor and temperature sensor in refrigerating device |
| JP2004132610A (en) * | 2002-10-10 | 2004-04-30 | Mitsubishi Electric Corp | Heating system and dwelling house with heating system |
| CN102261719A (en) * | 2011-05-25 | 2011-11-30 | 宁波奥克斯电气有限公司 | Control method for starting heating mode of screw-type compressed multi-connected central air conditioner |
| CN102914027A (en) * | 2012-09-20 | 2013-02-06 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant of outdoor unit from bias flowing during refrigeration of multi-split air-conditioning unit |
| CN103075774A (en) * | 2013-01-09 | 2013-05-01 | 合肥天鹅制冷科技有限公司 | Combined air handling unit driven by total heat recovery type heat pump |
| CN103791587A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Method for judging whether resistance values of temperature sensors of multi-union air conditioner of heating mode deviate |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545958A (en) * | 2016-10-11 | 2017-03-29 | 广东美的暖通设备有限公司 | The decision method that multiple on-line system and its indoor set refrigerating capacity are not enough |
| CN106545958B (en) * | 2016-10-11 | 2019-07-26 | 广东美的暖通设备有限公司 | Multi-line system and its insufficient determination method of indoor unit refrigerating capacity |
| CN106403201A (en) * | 2016-11-10 | 2017-02-15 | 广东美的暖通设备有限公司 | Control method for accumulating liquid of fresh air ventilator heat exchanger of air conditioner and air conditioner |
| CN106403201B (en) * | 2016-11-10 | 2019-03-15 | 广东美的暖通设备有限公司 | The control method and air conditioner of the fresh air machine heat exchanger hydrops of air conditioner |
| CN107036243A (en) * | 2017-04-24 | 2017-08-11 | 广东美的暖通设备有限公司 | Indoor set points out control method and system, indoor set, multi-connected machine central air-conditioning |
| CN107036243B (en) * | 2017-04-24 | 2019-11-15 | 广东美的暖通设备有限公司 | Indoor unit prompts control method and system, indoor unit, multi-connected machine central air-conditioning |
| CN111023261A (en) * | 2019-12-17 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Method and device for reducing on-line noise of multi-connected unit and multi-connected unit |
| CN111023261B (en) * | 2019-12-17 | 2021-07-16 | 宁波奥克斯电气股份有限公司 | Method and device for reducing on-line noise of multi-connected unit and multi-connected unit |
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| CN105526676B (en) | 2018-07-27 |
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