CN101113854A - Oil equalizing and coolant counterbalancing system of multiple air-conditioning unit and controlling method thereof - Google Patents
Oil equalizing and coolant counterbalancing system of multiple air-conditioning unit and controlling method thereof Download PDFInfo
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- CN101113854A CN101113854A CNA2006101036487A CN200610103648A CN101113854A CN 101113854 A CN101113854 A CN 101113854A CN A2006101036487 A CNA2006101036487 A CN A2006101036487A CN 200610103648 A CN200610103648 A CN 200610103648A CN 101113854 A CN101113854 A CN 101113854A
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Abstract
The invention discloses an oil and refrigerant balancing system of a multiple air-conditioning team, being divided into a plurality of modules. Each of the modules comprises a compressor unit, an oil separator, an oil return capillary 1, a gas-liquid separator and an oil pressure cut-off valve; each of the modules further comprises an oil balancing unit and a refrigerant balancing unit, wherein, the oil balancing unit is connected between the oil separator and the oil pressure cut-off valve and used for oil balancing control between the compressors; the refrigerant balancing unit is connected between the gas-liquid separator and the oil pressure cut-off valve and is used for balancing the lower pressure between the modules. The oil pressure cut-off valves of the modules are connected with pipelines that are used together by the oil balancing unit and the refrigerant balancing unit. The invention further discloses an oil and refrigerant balance controlling method of the multiple air-conditioning team, comprising an oil balance controlling process that realizes oil balance control between the compressors by using the oil balancing unit and a refrigerant balance controlling process that realizes low pressure balance between the modules by using the refrigerant balancing unit.
Description
Technical field
The present invention relates to air-conditioning technical field, especially relate to a kind of equal oil and refrigerant balance sysmte and control method of VRF Air Conditioning System.
Background technology
In refrigeration system, during compressor operating, there is a small part refrigeration oil continuously from cylinder, to be forced out with cold-producing medium, enter in the pipeline and condenser and evaporimeter of refrigeration system.When refrigeration oil can not return compressor continuously, can cause the compressor pasta to descend, so that the refrigeration oil exhaustion, the phenomenon that the compressor oil starvation burns appears.
In the refrigeration system of having only a compressor, as long as adopt measures necessary, as adopt rational circuit design, after each position of system forms stable oil mass distribution, refrigeration oil can waltz through compressor suction duct and return compressor, makes compressor keep normal work pasta.
And in the wide refrigeration system of load variations, only use the separate unit compressor to adopt start and stop control often can not adapt to the needs of the acute variation of loading as the energy adjustment measure, therefore adopt VRF Air Conditioning System that the multiple compressors parallel connection is used in same refrigeration system, not only can widen the range of capacity of refrigeration system, reduce starting current, prolong the service life of compressor, can also simplify system significantly, reduce cost of investment.
At present, the oil-balancing system of VRF Air Conditioning System and refrigerant balance sysmte are relatively independent, and off-premises station is connected with tracheae, liquid pipe, oil equalizing pipe and balance pipe 4 road pipelines respectively.Wherein, oil-balancing system utilizes the equal oilhole on the compressor to be connected with oil equalizing pipe, is used for the equal oil control of each compressor chamber; The refrigerant balance sysmte utilizes balance pipe that the low pressure of each module is ganged up, and is used for the balance of each intermodule low pressure.
But, when adopting the oil-balancing system of above-mentioned VRF Air Conditioning System and refrigerant balance sysmte, need carry out the connection of 4 road pipelines, connect complicated; And this oil-balancing system is to utilize the equal oilhole on the compressor to be connected with oil equalizing pipe, in equal oily process, mainly utilize the pressure differential of compressor chamber to carry out all oil control, produce bigger pressure differential because in actual moving process, be difficult in each compressor chamber, so equal oily effect is undesirable.
Summary of the invention
The problem to be solved in the present invention provides a kind of equal oil and refrigerant balance sysmte and control method of VRF Air Conditioning System, and VRF Air Conditioning System connects complicated and the unfavorable defective of equal oily effect in the prior art to overcome.
For achieving the above object, the invention provides a kind of equal oil and refrigerant balance sysmte of VRF Air Conditioning System, be divided into a plurality of modules, each module comprises compressor bank, oil eliminator, oil return capillary 1, gas-liquid separator and oil pressure stop valve; Each module also comprises equal oily unit and refrigerant balancing unit, and wherein equal oily unit is connected between described oil eliminator and the described oil pressure stop valve, is used for the equal oil control of each compressor chamber; The refrigerant balancing unit is connected between described gas-liquid separator and the described oil pressure stop valve, is used for the balance of each intermodule low pressure; Connect with pipeline between the oil pressure stop valve of each module, this pipeline is that described equal oily unit and described refrigerant balancing unit are shared.
According to one aspect of the present invention, equal oily unit further comprises oil return capillary 2, oil conservator, magnetic valve 1 and magnetic valve 2; Wherein oil return capillary 2 is connected between the arrival end of described oil eliminator and described oil conservator, and magnetic valve 1 is connected in parallel on described oil return capillary 2 two ends, and magnetic valve 2 is connected between the port of export of described oil pressure stop valve and described oil conservator.
According to another aspect of the present invention, the refrigerant balancing unit further comprises magnetic valve 3, and described magnetic valve 3 is connected with described oil pressure stop valve with described gas-liquid separator respectively by pipeline.
According to another aspect of the present invention, adopt three-way interface to connect between described oil pressure stop valve, equal oily unit and the refrigerant balancing unit by pipeline.
The invention provides a kind of equal oil of VRF Air Conditioning System and the control method of refrigerant balance, comprising: equal oily control procedure, utilize equal oily unit, realize the equal oil control of each compressor chamber; Refrigerant balance control procedure is utilized the refrigerant balancing unit, realizes the balance of each intermodule low pressure.
According to another aspect of the present invention, equal oily control procedure further comprises: open the magnetic valve 3 of oil suction module, close the magnetic valve 1 and the magnetic valve 2 of oil suction module; Open the magnetic valve 1 and the magnetic valve 2 of fuel oil supply unit, close the magnetic valve 3 of fuel oil supply unit; Utilize the oil conservator of fuel oil supply unit and the pressure differential between the oil suction module, fuel oil supply unit is transferred to the oil suction module with the refrigeration oil in its oil conservator; Postpone to finish equal oily process behind the preset time.
According to another aspect of the present invention, equal oily control procedure further comprises: magnetic valve 1, magnetic valve 2 and the magnetic valve 3 of opening the oil suction module; Open the magnetic valve 1 and the magnetic valve 2 of fuel oil supply unit, close the magnetic valve 3 of fuel oil supply unit; Utilize the oil conservator of fuel oil supply unit and oil suction module and the pressure differential between the oil suction module, fuel oil supply unit and oil suction module are transferred to the oil suction module with the refrigeration oil in its oil conservator; Postpone to finish equal oily process behind the preset time.
According to another aspect of the present invention, refrigerant balance control procedure is specially: open the magnetic valve 3 of each module, close the magnetic valve 2 of each module, the low-pressure side between each module is communicated with by the refrigerant balancing unit, realize the balance of each intermodule low pressure.
Compared with prior art, the present invention has the following advantages:
Pipeline between the oil pressure stop valve of each module of the present invention is that equal oily unit and refrigerant balancing unit are shared, has reduced the pipeline that VRF Air Conditioning System connects, and makes to connect simply.
In addition, the present invention adopts oil conservator, makes to produce bigger pressure differential between the oil conservator of each module and each module, can apace refrigeration oil be transferred to the module of appointment, has guaranteed the reliability of equal oil.
Further, the pressure differential between oil conservator of the present invention and the module does not need to realize by the normal operation frequency that changes compressor specially, can guarantee that the operational effect of system is unaffected.
Description of drawings
Fig. 1 is the equal oil and the refrigerant balance sysmte figure of a kind of VRF Air Conditioning System of the present invention;
Fig. 2 is the equal oily control flow chart of the VRF Air Conditioning System of the embodiment of the invention one;
Fig. 3 is the equal oily control flow chart of the VRF Air Conditioning System of the embodiment of the invention two;
Fig. 4 is the refrigerant balance control flow chart of a kind of VRF Air Conditioning System of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
The equal oil of a kind of VRF Air Conditioning System of the present invention and refrigerant balance sysmte as shown in Figure 1, this system comprises A and two modules of B, the tracheae stop valve by inside modules is connected with indoor set B with indoor set A with liquid pipe stop valve.Modules A is identical with the structure of module B, all comprises compressor bank, oil eliminator, oil return capillary 1, gas-liquid separator, oil pressure stop valve, equal oily unit and refrigerant balancing unit.Wherein equal oily unit is connected between oil eliminator and the oil pressure stop valve, is used for the equal oil control of each compressor chamber; The refrigerant balancing unit is connected between gas-liquid separator and the oil pressure stop valve, is used for the balance of low pressure between modules A and the module B; Connect with pipeline between the oil pressure stop valve of modules A and module B, this pipeline is that equal oily unit and refrigerant balancing unit are shared.
Compressor bank among modules A and the module B all comprises A and two compressors of B, and equal oily unit comprises oil return capillary 2, oil conservator, magnetic valve SV1 and magnetic valve SV2, and the refrigerant balancing unit comprises magnetic valve SV3; Wherein compressor A and compressor B parallel connection, its exhaust outlet is connected with oil eliminator, air entry is connected with gas-liquid separator, oil return capillary 2 is connected between the arrival end of oil eliminator and oil conservator, magnetic valve SV1 is connected in parallel on oil return capillary 2 two ends, magnetic valve SV2 is connected between the port of export of oil pressure stop valve and oil conservator, magnetic valve SV3 is connected with the oil pressure stop valve with gas-liquid separator respectively by pipeline, and adopts three-way interface to connect by pipeline between oil pressure stop valve, magnetic valve SV2 and the magnetic valve SV3.
Compressor A and compressor B are in operation process, separate by oil eliminator with the refrigeration oil that compressor air-discharging is taken out of, part refrigeration oil enters gas-liquid separator by oil return capillary 1, enters the air entry of compressor again from gas-liquid separator, returns compressor then; Another part enters oil conservator by oil return capillary 2.
The equal oil of a kind of VRF Air Conditioning System of the present invention and the control method of refrigerant balance comprise equal oily control procedure and refrigerant balance control procedure.The equal oil control of each compressor chamber is realized in the equal oily unit of wherein equal oily control procedure utilization, and refrigerant balance control procedure utilizes the refrigerant balancing unit to realize the balance of each intermodule low pressure.Equal oily unit is connected by three-way interface at oil pressure stop valve place with the refrigerant balancing unit, utilizes the opening and closing of magnetic valve to carry out the switching that all oil is controlled and the refrigerant balance is controlled.
Embodiment one, and when equal oil that adopts VRF Air Conditioning System shown in Figure 1 and refrigerant balance sysmte, the equal oily control flow of a kind of VRF Air Conditioning System of the present invention as shown in Figure 2.In the present embodiment, modules A will absorb the refrigeration oil in the module B oil conservator, and module B will absorb the refrigeration oil in the modules A oil conservator.With reference to Fig. 2, control procedure of the present invention is as follows:
Suppose that modules A carries out oil suction, then modules A is the oil suction module, and module B is a fuel oil supply unit.At first, open the magnetic valve SV3 of modules A, the magnetic valve SV1 of closing module A and magnetic valve SV2; Open magnetic valve SV1 and the magnetic valve SV2 of module B again, the magnetic valve SV3 of closing module B; Utilize the oil conservator of module B and the pressure differential between the modules A then, module B is transferred to modules A with the refrigeration oil in its oil conservator; Postpone to finish after 2 minutes equal oily process.Enter equal oil running after 1 hour once more, module B carries out oil suction, and then module B is the oil suction module, and modules A is a fuel oil supply unit.Open the magnetic valve SV3 of module B, the magnetic valve SV1 of closing module B and magnetic valve SV2; Open the magnetic valve SV1 and the magnetic valve SV2 of modules A, the magnetic valve SV3 of closing module A; Utilize the oil conservator of modules A and the pressure differential between the module B then, modules A is transferred to module B with the refrigeration oil in its oil conservator; Postpone to finish after 2 minutes equal oily process.Carry out so in turn, realize the equal oil of each compressor chamber.
Embodiment two, and when equal oil that adopts VRF Air Conditioning System shown in Figure 1 and refrigerant balance sysmte, the equal oily control flow of a kind of VRF Air Conditioning System of the present invention as shown in Figure 3.In the present embodiment, the refrigeration oil in modules A and the module B oil conservator enters a module simultaneously.With reference to Fig. 3, control procedure of the present invention is as follows:
Suppose that modules A carries out oil suction, then modules A is the oil suction module, and module B is a fuel oil supply unit.At first, open magnetic valve SV1, magnetic valve SV2 and the magnetic valve SV3 of modules A; Open magnetic valve SV1 and the magnetic valve SV2 of module B again, the magnetic valve SV3 of closing module B; Utilize the oil conservator of module B and modules A and the pressure differential between the modules A then, module B and modules A are transferred to modules A with the refrigeration oil in its oil conservator; Postpone to finish after 2 minutes equal oily process.Enter equal oil running after 1 hour once more, module B carries out oil suction, and then module B is the oil suction module, and modules A is a fuel oil supply unit.Open magnetic valve SV1, magnetic valve SV2 and the magnetic valve SV3 of module B; Open the magnetic valve SV1 and the magnetic valve SV2 of modules A again, the magnetic valve SV3 of closing module A; Utilize the oil conservator of modules A and module B and the pressure differential between the module B then, modules A and module B are transferred to module B with the refrigeration oil in its oil conservator; Postpone to finish after 2 minutes equal oily process.Carry out so in turn, realize the equal oil of each compressor chamber.
Embodiment three, and when equal oil that adopts VRF Air Conditioning System shown in Figure 1 and refrigerant balance sysmte, the refrigerant balance control flow of a kind of VRF Air Conditioning System of the present invention as shown in Figure 4.At first, open the magnetic valve 3 of each module, close the magnetic valve 2 of each module then, the low-pressure side between each module is communicated with by the refrigerant balancing unit, realize the balance of each intermodule low pressure.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. the equal oil of a VRF Air Conditioning System and refrigerant balance sysmte, be divided into a plurality of modules, each module comprises compressor bank, oil eliminator, oil return capillary 1, gas-liquid separator and oil pressure stop valve, it is characterized in that, each module also comprises equal oily unit and refrigerant balancing unit, wherein
Equal oily unit is connected between described oil eliminator and the described oil pressure stop valve, is used for the equal oil control of each compressor chamber;
The refrigerant balancing unit is connected between described gas-liquid separator and the described oil pressure stop valve, is used for the balance of each intermodule low pressure;
Connect with pipeline between the oil pressure stop valve of each module, this pipeline is that described equal oily unit and described refrigerant balancing unit are shared.
2. the equal oil of VRF Air Conditioning System and refrigerant balance sysmte according to claim 1 is characterized in that equal oily unit further comprises oil return capillary 2, oil conservator, magnetic valve 1 and magnetic valve 2;
Wherein oil return capillary 2 is connected between the arrival end of described oil eliminator and described oil conservator, and magnetic valve 1 is connected in parallel on described oil return capillary 2 two ends, and magnetic valve 2 is connected between the port of export of described oil pressure stop valve and described oil conservator.
3. the equal oil of VRF Air Conditioning System and refrigerant balance sysmte according to claim 1 is characterized in that the refrigerant balancing unit further comprises magnetic valve 3, and described magnetic valve 3 is connected with described oil pressure stop valve with described gas-liquid separator respectively by pipeline.
4. the equal oil of VRF Air Conditioning System and refrigerant balance sysmte according to claim 1 is characterized in that, adopt three-way interface to connect by pipeline between described oil pressure stop valve, equal oily unit and the refrigerant balancing unit.
5. the control method of the equal oil of a VRF Air Conditioning System and refrigerant balance is characterized in that, comprising:
Equal oily control procedure is utilized equal oily unit, realizes the equal oil control of each compressor chamber;
Refrigerant balance control procedure is utilized the refrigerant balancing unit, realizes the balance of each intermodule low pressure.
6. as the equal oil of VRF Air Conditioning System as described in the claim 5 and the control method of refrigerant balance, it is characterized in that equal oily control procedure further comprises:
Open the magnetic valve 3 of oil suction module, close the magnetic valve 1 and the magnetic valve 2 of oil suction module;
Open the magnetic valve 1 and the magnetic valve 2 of fuel oil supply unit, close the magnetic valve 3 of fuel oil supply unit;
Utilize the oil conservator of fuel oil supply unit and the pressure differential between the oil suction module, fuel oil supply unit is transferred to the oil suction module with the refrigeration oil in its oil conservator;
Postpone to finish equal oily process behind the preset time.
7. as the equal oil of VRF Air Conditioning System as described in the claim 5 and the control method of refrigerant balance, it is characterized in that equal oily control procedure further comprises:
Open magnetic valve 1, magnetic valve 2 and the magnetic valve 3 of oil suction module;
Open the magnetic valve 1 and the magnetic valve 2 of fuel oil supply unit, close the magnetic valve 3 of fuel oil supply unit;
Utilize the oil conservator of fuel oil supply unit and oil suction module and the pressure differential between the oil suction module, fuel oil supply unit and oil suction module are transferred to the oil suction module with the refrigeration oil in its oil conservator;
Postpone to finish equal oily process behind the preset time.
8. as the equal oil of VRF Air Conditioning System as described in the claim 5 and the control method of refrigerant balance, it is characterized in that refrigerant balance control procedure is specially:
Open the magnetic valve 3 of each module, close the magnetic valve 2 of each module, the low-pressure side between each module is communicated with by the refrigerant balancing unit, realize the balance of each intermodule low pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101036487A CN101113854A (en) | 2006-07-26 | 2006-07-26 | Oil equalizing and coolant counterbalancing system of multiple air-conditioning unit and controlling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101036487A CN101113854A (en) | 2006-07-26 | 2006-07-26 | Oil equalizing and coolant counterbalancing system of multiple air-conditioning unit and controlling method thereof |
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| CN102278837A (en) * | 2011-01-28 | 2011-12-14 | 大连三洋压缩机有限公司 | Oil equalization system of compressor units |
| CN102305439A (en) * | 2011-06-29 | 2012-01-04 | 宁波奥克斯电气有限公司 | Multi-connected air-conditioning unit |
| CN102353116A (en) * | 2011-07-27 | 2012-02-15 | 宁波奥克斯电气有限公司 | Explosion-proof control method of multi-connected air conditioning unit at runtime |
| CN102455084A (en) * | 2010-10-18 | 2012-05-16 | 珠海格力电器股份有限公司 | Parallel system of multiple high-pressure cavity compressors |
| CN102901189A (en) * | 2012-09-29 | 2013-01-30 | 四川长虹电器股份有限公司 | Air conditioning system, control system and air conditioning control method |
| CN103604193A (en) * | 2013-11-22 | 2014-02-26 | 四川长虹电器股份有限公司 | Multi-outdoor-unit air conditioning pressure balancing device and pressure balancing control method |
| CN103673399A (en) * | 2012-09-14 | 2014-03-26 | 珠海格力电器股份有限公司 | Multi-module parallel-connection oil balancing system and control method |
| CN104236166A (en) * | 2013-06-20 | 2014-12-24 | 珠海格力电器股份有限公司 | Compression module for air conditioning system, air conditioning system and oil balancing method of compression module |
| CN104344456A (en) * | 2013-07-29 | 2015-02-11 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and outdoor unit refrigerant distribution unevenness adjusting method thereof |
| CN104457030A (en) * | 2013-09-13 | 2015-03-25 | 约克广州空调冷冻设备有限公司 | Oil way system for parallel-connection type air conditioning unit and parallel-connection type air conditioning unit |
| CN106123117A (en) * | 2016-06-29 | 2016-11-16 | 青岛海尔空调电子有限公司 | A kind of air conditioning unit and control method of multi-connected machine |
| CN104236166B (en) * | 2013-06-20 | 2016-11-30 | 珠海格力电器股份有限公司 | The oily balance method of the compression module of air conditioning system, air conditioning system and compression module |
| CN110887271A (en) * | 2014-11-21 | 2020-03-17 | 洋马株式会社 | Heat pump |
| CN111256379A (en) * | 2018-11-30 | 2020-06-09 | 广东美芝精密制造有限公司 | Refrigerating device |
| CN113959122A (en) * | 2021-09-16 | 2022-01-21 | 青岛海尔空调电子有限公司 | Refrigeration system, control method and control device for refrigeration system |
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- 2006-07-26 CN CNA2006101036487A patent/CN101113854A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102455084A (en) * | 2010-10-18 | 2012-05-16 | 珠海格力电器股份有限公司 | Parallel system of multiple high-pressure cavity compressors |
| CN102278837B (en) * | 2011-01-28 | 2013-08-14 | 大连三洋压缩机有限公司 | Oil equalization system of compressor units |
| CN102278837A (en) * | 2011-01-28 | 2011-12-14 | 大连三洋压缩机有限公司 | Oil equalization system of compressor units |
| CN102305439A (en) * | 2011-06-29 | 2012-01-04 | 宁波奥克斯电气有限公司 | Multi-connected air-conditioning unit |
| CN102353116A (en) * | 2011-07-27 | 2012-02-15 | 宁波奥克斯电气有限公司 | Explosion-proof control method of multi-connected air conditioning unit at runtime |
| CN103673399A (en) * | 2012-09-14 | 2014-03-26 | 珠海格力电器股份有限公司 | Multi-module parallel-connection oil balancing system and control method |
| CN103673399B (en) * | 2012-09-14 | 2016-06-08 | 珠海格力电器股份有限公司 | Multiple module paralleling oil-balancing system and control method |
| CN102901189B (en) * | 2012-09-29 | 2014-12-24 | 四川长虹电器股份有限公司 | Air conditioning system, control system and air conditioning control method |
| CN102901189A (en) * | 2012-09-29 | 2013-01-30 | 四川长虹电器股份有限公司 | Air conditioning system, control system and air conditioning control method |
| CN104236166B (en) * | 2013-06-20 | 2016-11-30 | 珠海格力电器股份有限公司 | The oily balance method of the compression module of air conditioning system, air conditioning system and compression module |
| CN104236166A (en) * | 2013-06-20 | 2014-12-24 | 珠海格力电器股份有限公司 | Compression module for air conditioning system, air conditioning system and oil balancing method of compression module |
| CN104344456A (en) * | 2013-07-29 | 2015-02-11 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and outdoor unit refrigerant distribution unevenness adjusting method thereof |
| CN104344456B (en) * | 2013-07-29 | 2017-03-29 | 广东美的暖通设备有限公司 | The uneven control method of multi-online air-conditioning system and its off-premises station coolant distribution |
| CN104457030A (en) * | 2013-09-13 | 2015-03-25 | 约克广州空调冷冻设备有限公司 | Oil way system for parallel-connection type air conditioning unit and parallel-connection type air conditioning unit |
| CN103604193B (en) * | 2013-11-22 | 2016-03-30 | 四川长虹电器股份有限公司 | The outer air conditioner pressure equaliser of a kind of multicell and control method for pressure balance |
| CN103604193A (en) * | 2013-11-22 | 2014-02-26 | 四川长虹电器股份有限公司 | Multi-outdoor-unit air conditioning pressure balancing device and pressure balancing control method |
| CN110887271A (en) * | 2014-11-21 | 2020-03-17 | 洋马株式会社 | Heat pump |
| CN106123117A (en) * | 2016-06-29 | 2016-11-16 | 青岛海尔空调电子有限公司 | A kind of air conditioning unit and control method of multi-connected machine |
| CN111256379A (en) * | 2018-11-30 | 2020-06-09 | 广东美芝精密制造有限公司 | Refrigerating device |
| CN113959122A (en) * | 2021-09-16 | 2022-01-21 | 青岛海尔空调电子有限公司 | Refrigeration system, control method and control device for refrigeration system |
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