CN101871699A - Air-conditioning system and method thereof for judging perfusion volume of refrigerant - Google Patents
Air-conditioning system and method thereof for judging perfusion volume of refrigerant Download PDFInfo
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- CN101871699A CN101871699A CN200910038915A CN200910038915A CN101871699A CN 101871699 A CN101871699 A CN 101871699A CN 200910038915 A CN200910038915 A CN 200910038915A CN 200910038915 A CN200910038915 A CN 200910038915A CN 101871699 A CN101871699 A CN 101871699A
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- subcooler
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- conditioning system
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- refrigerant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses an air-conditioning system and a method thereof for judging the perfusion volume of refrigerant, thereby ensuring that the system has the appropriate refrigerant for circulatory operation during the running, improving the running efficiency and the running service life of a machine unit and ensuring the using effect of a user. The air-conditioning system comprises an outdoor unit part and an indoor unit part, wherein the outdoor unit part comprises a controller, a compressor, a four-way valve, a steam separator, an outdoor heat exchanger, an overcooling device and an electronic expansion valve; the outlet end of a gas pipe of the overcooling device and a third interface of the four-way valve are converged and further connected with an inlet of the steam separator, and the outlet end of a liquid pipe of the overcooling device is communicated with a second connecting pipe of the indoor unit part; and the air-conditioning system is provided with a first temperature sensor and a second temperature sensor, the first temperature sensor is positioned in the position of a pipeline between an outlet of the outdoor heat exchanger and an inlet of the liquid pipe of the overcooling device, and the second temperature sensor is positioned in the position of a pipeline between an outlet of the liquid pipe of the overcooling device and the connecting pipe of the indoor unit part.
Description
Technical field
The invention belongs to air-conditioning technical field, relate in particular to a kind of air-conditioning system of using sub-cooler and the determination methods of refrigerant perfused amount thereof.
Background technology
The structure of subcooler in the air-conditioning system, with annexation, function and the operation principle of miscellaneous part: the cold-producing medium that comes out from outdoor heat exchanger is the liquid of HTHP, be divided into road up and down then, the cold-producing medium of setting out on a journey has entered subcooler liquid pipe, the cold-producing medium on following road is through the electric expansion valve throttling, its pressure and temperature can further reduce, enter the subcooler tracheae then, cold-producing medium absorbs the heat of cold-producing medium in the peripheral subcooler liquid pipe and finishes evaporating course in the subcooler tracheae.And the cold-producing medium in subcooler liquid pipe is also because absorbed heat, and its temperature further reduces, and has obtained bigger degree of supercooling.Cold-producing medium in the subcooler liquid pipe is followed in the inlet chamber and is evaporated then, refrigeration, and the refrigerant gas in the subcooler tracheae just enters vapour separator, gets back to compressor then.
In the air-conditioning system of using sub-cooler, whether the groundwater increment of cold-producing medium is suitable, performance to air-conditioning system plays critical effect: if the fluorine phenomenon appears lacking in the system refrigerant deficiency in the time of can causing the whole system operation, influence the runnability of unit, reduced the service life of unit, and can make user's result of use poor; If system refrigerant too much can make the refrigerant evaporation after the throttling incomplete, cause liquid refrigerants to get back to compressor easily, influence the runnability of compressor.At above situation, in the air-conditioning system of using sub-cooler, should have and a kind ofly judge that whether suitable whole system cross cryogen groundwater increment determination methods, to guarantee that system's operation the time has suitable cold-producing medium to carry out cycle operation, improve the operational efficiency and the service life of unit, guarantee user's result of use.
Summary of the invention
The object of the present invention is to provide the determination methods of a kind of air-conditioning system and refrigerant perfused amount thereof, the time have suitable cold-producing medium to carry out cycle operation, improve the operational efficiency and the service life of unit, guarantee user's result of use to guarantee system's operation.
The present invention is achieved through the following technical solutions:
Air-conditioning system comprises outdoor machine part and indoor set part, and wherein outdoor machine part includes controller, compressor, and the blast pipe of described compressor connects first interface of cross valve, and air inlet pipe connects the outlet of vapour separator; Second interface of described cross valve is connected with an end of outdoor heat exchanger, the 4th interface of cross valve is communicated with indoor set part first tube connector; Wherein, the other end of described outdoor heat exchanger divides two-way: the one tunnel is connected with the liquid pipe of subcooler, and another road has connected the tracheae that inserts subcooler behind the electric expansion valve, and described electric expansion valve is used for regulating through subcooler low-pressure side cold medium flux; The tracheae port of export of subcooler and the 3rd interface of cross valve converge and are connected the import of vapour separator, and the liquid pipe port of export of subcooler is communicated with indoor set part second tube connector; Described air-conditioning system is provided with first temperature sensor and second temperature sensor, described first temperature sensor exports to pipeline location between the import of subcooler liquid pipe at outdoor heat exchanger, and described second temperature sensor is at the liquid pipe outlet of subcooler and the pipeline location between indoor set part second tube connector.
Be communicated with by the liquid bypass pipeline between the tracheae of described outdoor heat exchanger and subcooler, described electric expansion valve is installed on the liquid bypass pipeline.
Described indoor set partly includes the indoor set of many parallel connections, and every indoor set is provided with the electric expansion valve throttling.
Described indoor set part first tube connector is by first valve and the 4th interface that is connected cross valve, and described first valve is used for controlling the break-make of the first tube connector refrigerant flow path.
Described indoor set part second tube connector is connected with the liquid pipe of subcooler by second valve, and described second valve is used for controlling the break-make of the second tube connector refrigerant flow path.
The determination methods of the refrigerant perfused amount of above-mentioned air-conditioning system, wherein, by described first temperature sensor and second temperature sensor, detect in real time the temperature that is positioned at outdoor heat exchanger and exports to copper pipe between the high-pressure side liquid import of subcooler liquid pipe, the temperature that subcooler liquid pipe high-pressure side liquid exports to copper pipe between indoor set, judge according to the difference between two temperatures whether the groundwater increment of cold-producing medium in the air-conditioning system of using sub-cooler is suitable.
Beneficial effect of the present invention is as follows:
The determination methods of air-conditioning system of the present invention and refrigerant perfused amount thereof is applicable in the air-conditioning system that subcooler is installed.This determination methods only needs sensing chamber's external heat exchanger to export to the temperature of pipeline section between the liquid import of subcooler high-pressure side, the temperature that subcooler high-pressure side liquid exports to indoor set interstitial fluid pipe, according to the difference between two temperatures just as can be known in the system groundwater increment of cold-producing medium whether suitable, thereby carry out corresponding adjustment according to the result who judges, there is suitable cold-producing medium to carry out cycle operation when guaranteeing system's operation, improve the operational efficiency and the service life of unit, guarantee user's result of use.
Description of drawings
Fig. 1 is the structural representation of air-conditioning system of the present invention;
Fig. 2 is air-conditioning system groundwater increment of the present invention and target temperature difference graph of relation.
The specific embodiment
Ask for an interview Fig. 1, the invention discloses a kind of air-conditioning system, comprise outdoor machine part and indoor set part, wherein outdoor machine part includes controller, compressor 1, the blast pipe of described compressor connects first interface of cross valve 4, and air inlet pipe connects the outlet of vapour separator 6; Second interface of described cross valve 4 is connected with outdoor heat exchanger 2, the 4th interface of cross valve 4 is communicated with indoor set part first tube connector; Wherein, the other end of described outdoor heat exchanger 2 divides two-way: the one tunnel is connected with the liquid pipe 31 of subcooler, and another road has connected the tracheaes 32 that subcoolers are inserted in electric expansion valve 5 backs, and described electric expansion valve 5 is used for regulating through subcooler low-pressure side cold medium flux; Tracheae 32 ports of export and the 3rd interface of cross valve of subcooler converges and is connected the import of vapour separator 6, and liquid pipe 31 ports of export of subcooler are communicated with indoor set part second tube connector; Described air-conditioning system is provided with first temperature sensor 10 and second temperature sensor 20, described first temperature sensor 10 exports to pipeline location between 31 imports of subcooler liquid pipe at outdoor heat exchanger 2, and described second temperature sensor 20 is at liquid pipe 31 outlets of subcooler and the pipeline location between indoor set part second tube connector.
Be communicated with by the liquid bypass pipeline between the tracheae 32 of described outdoor heat exchanger 2 and subcooler, described electric expansion valve 5 is installed on the liquid bypass pipeline.
Described indoor set partly includes the indoor set of many parallel connections, and every indoor set is provided with the electric expansion valve throttling.
Described indoor set part first tube connector is by first valve 71 and the 4th interface that is connected cross valve, and described first valve is used for controlling the break-make of the first tube connector refrigerant flow path.
8, described indoor set part second tube connector is connected with the liquid pipe of subcooler by second valve 72, and described second valve is used for control
Make the break-make of refrigerant flow path in second tube connector.
The determination methods of the refrigerant perfused amount of above-mentioned air-conditioning system, wherein, by described first temperature sensor 10 and second temperature sensor 20, detection in real time is positioned at the temperature T that outdoor heat exchanger 2 exports to copper pipe between the 31 high-pressure side liquid imports of subcooler liquid pipe
1, subcooler liquid pipe 31 high-pressure side liquid export to the temperature T of copper pipe between indoor set
2, judge according to the difference between two temperatures whether the groundwater increment of cold-producing medium in the air-conditioning system of using sub-cooler is suitable.
Its concrete determination methods is:
Outdoor controller exports to the temperature T of copper pipe between the 31 high-pressure side liquid imports of subcooler liquid pipe based on outdoor heat exchanger 2
1, subcooler liquid pipe 31 high-pressure side liquid export to the temperature T of copper pipe pipe between indoor set
2, target setting temperature difference Δ t and judgment value X, Y judge whether groundwater increment suitable:
As (T
1-T
2-Δ t)＜during X, judge system refrigerant groundwater increment deficiency;
As (T
1-T
2-Δ t)＞during Y, judge that the system refrigerant groundwater increment is too much;
As X＜(T
1-T
2-Δ t)＜during Y, judge that the system refrigerant groundwater increment is suitable;
And wherein the target temperature difference is recently determined according to the power system capacity demand:
| Capacity requirement percentage | Target temperature poor (℃) |
| ??≥50％ | ??a |
| ??＜50％ | ??b |
A has different numerical value with b.
Whether suitable the invention provides the determination methods of refrigerant perfused amount in a kind of air-conditioning system of using sub-cooler: the compressed machine of cold-producing medium that comes out from indoor units is compressed into high-temperature high-pressure refrigerant, dispel the heat to outdoor environment through outdoor heat exchanger then and become the cold-producing medium of temperature liquid (may have a spot of gas) in the high pressure, the cold-producing medium that comes out from outdoor heat exchanger is divided into two-way, one road cold-producing medium comes out to enter the processing that is cooled of subcooler liquid pipe through main line from outdoor heat exchanger, one road cold-producing medium comes out through liquid bypass to electric expansion valve throttling step-down from outdoor heat exchanger, enter the heat that evaporation absorption subcooler liquid pipe is discharged in the subcooler tracheae then, vaporize after the vapour phase shunt valve enters in the vapour separator.
Refrigerant divides two-way to enter subcooler through outdoor heat exchanger 2 outlets, and most refrigerant directly enters subcooler liquid pipe 31, and few partly refrigerant enters subcooler tracheae 32 after electric expansion valve 5 throttlings.In subcooler, carrying out two kinds of different heat transfer process, the high-pressure side is a sensible heat transfer, low-pressure side is the latent heat heat exchange, both heat exchange amounts should equate, be that the high-pressure side liberated heat equals the heat that low-pressure side absorbs, increase electric expansion valve 5 step numbers, the flow of low-pressure side increases, the heat exchange amount increases, and the heat that absorbs from the high-pressure side increases, and the enthalpy drop after the heat exchange of high-pressure side increases, because of the high-pressure side is a sensible heat transfer, enthalpy drop is followed temperature drop, and vice versa, so can export to the temperature T of copper pipe between the 31 high-pressure side liquid imports of subcooler liquid pipe by real-time sensing chamber external heat exchanger 2
1, subcooler liquid pipe 31 high-pressure side liquid export to the temperature T of copper pipe between indoor set
2, judge according to the difference between two temperatures whether the groundwater increment of cold-producing medium in the air-conditioning system of using sub-cooler is suitable.
As shown in Figure 2, when refrigerant perfused amount was on the low side, because heat exchange quantity not sufficient between the subcooler high and low pressure side, the sensible heat exchange that subcooler high pressure liquid-measuring tube carries out was insufficient, and the performance of subcooler is performance fully not, makes resulting temperature difference less than normal.When refrigerant perfused amount is on the high side, though temperature difference increase, owing to may causing system to return liquid, thus the temperature difference bigger than normal also be unallowed.As shown in Figure 2, setting the X value is-1, and the Y value is 1, promptly sets as-1＜(T
1-T
2-Δ t)＜1 o'clock groundwater increment is suitable, and wherein target temperature difference Δ t is made as 26 ℃.When groundwater increment during less than 14kg, heat transfer temperature difference is less than normal, (T
1-T
2-26)＜-1, can judge cold medium shortage, when 14-17kg, heat transfer temperature difference is constant substantially ,-1＜(T
1-T
2-26)＜1 coolant quantity is suitable, and when groundwater increment during greater than 17kg, heat transfer temperature difference is excessive, (T
1-T
2-26)＞1, groundwater increment is bigger than normal.So can judge whether the groundwater increment of cold-producing medium in the air-conditioning system of using sub-cooler is suitable according to the difference between two temperatures.
Of the present invention being suitable for the cold-producing medium kind has nothing to do.
Above-mentioned listed specific implementation is nonrestrictive, to one skilled in the art, is not departing from the scope of the invention, and various improvement and the variation carried out all belong to protection scope of the present invention.What need indicate is that the related personnel also belongs to protection scope of the present invention to any connected mode alteration of form or parts replacement that does not relate to basic structure that the present invention makes.
Claims (7)
1. air-conditioning system comprises outdoor machine part and indoor set part, and wherein outdoor machine part includes controller, compressor, and the blast pipe of described compressor connects first interface of cross valve, and air inlet pipe connects the outlet of vapour separator; Second interface of described cross valve is connected with an end of outdoor heat exchanger, the 4th interface of cross valve is communicated with indoor set part first tube connector; It is characterized in that: the other end of described outdoor heat exchanger divides two-way: the one tunnel is connected with the liquid pipe of subcooler, and another road has connected the tracheae that inserts subcooler behind the electric expansion valve, and described electric expansion valve is used for regulating through subcooler low-pressure side cold medium flux; The tracheae port of export of subcooler and the 3rd interface of cross valve converge and are connected the import of vapour separator, and the liquid pipe port of export of subcooler is communicated with indoor set part second tube connector; Described air-conditioning system is provided with first temperature sensor and second temperature sensor, described first temperature sensor exports to pipeline location between the import of subcooler liquid pipe at outdoor heat exchanger, and described second temperature sensor is at the liquid pipe outlet of subcooler and the pipeline location between indoor set part second tube connector.
2. air-conditioning system as claimed in claim 1 is characterized in that: be communicated with by the liquid bypass pipeline between the tracheae of described outdoor heat exchanger and subcooler, described electric expansion valve is installed on the liquid bypass pipeline.
3. air-conditioning system as claimed in claim 2 is characterized in that: described indoor set partly includes the indoor set of many parallel connections, and every indoor set is provided with the electric expansion valve throttling.
4. as each described air-conditioning system in the claim 1 to 3, it is characterized in that: described indoor set part first tube connector is by first valve and the 4th interface that is connected cross valve, and described first valve is used for controlling the break-make of the first tube connector refrigerant flow path.
5. as each described air-conditioning system in the claim 1 to 3, it is characterized in that: described indoor set part second tube connector is connected with the liquid pipe of subcooler by second valve, and described second valve is used for controlling the break-make of the second tube connector refrigerant flow path.
6. as the determination methods of the refrigerant perfused amount of claim 1 or 3 described air-conditioning systems, it is characterized in that: by described first temperature sensor and second temperature sensor, detect in real time the temperature that is positioned at outdoor heat exchanger and exports to copper pipe between the high-pressure side liquid import of subcooler liquid pipe, the temperature that subcooler liquid pipe high-pressure side liquid exports to copper pipe between indoor set, judge according to the difference between two temperatures whether the groundwater increment of cold-producing medium in the air-conditioning system of using sub-cooler is suitable.
7. the determination methods of the refrigerant perfused amount of air-conditioning system as claimed in claim 6 is characterized in that:
Its concrete determination methods is:
Outdoor controller exports to the temperature T of pipeline section between the liquid import of subcooler high-pressure side based on outdoor heat exchanger
1, subcooler high-pressure side liquid exports to the temperature T of indoor set interstitial fluid pipe
2, target setting temperature difference Δ t and judgment value X, Y judge whether groundwater increment suitable:
As (T
1-T
2-Δ t)＜during X, judge system refrigerant groundwater increment deficiency;
As (T
1-T
2-Δ t)＞during Y, judge that the system refrigerant groundwater increment is too much;
As X＜(T
1-T
2-Δ t)＜during Y, judge that the system refrigerant groundwater increment is suitable;
And wherein the target temperature difference is recently determined according to the power system capacity demand:
A has different numerical value with b.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910038915A CN101871699B (en) | 2009-04-23 | 2009-04-23 | Air-conditioning system and method thereof for judging perfusion volume of refrigerant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910038915A CN101871699B (en) | 2009-04-23 | 2009-04-23 | Air-conditioning system and method thereof for judging perfusion volume of refrigerant |
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| Publication Number | Publication Date |
|---|---|
| CN101871699A true CN101871699A (en) | 2010-10-27 |
| CN101871699B CN101871699B (en) | 2012-10-03 |
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ID=42996709
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107429961A (en) * | 2015-03-31 | 2017-12-01 | 大金工业株式会社 | Refrigerating plant |
| CN109682105A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN111094877A (en) * | 2017-09-14 | 2020-05-01 | 三菱电机株式会社 | Refrigeration cycle device and refrigeration device |
| CN113932503A (en) * | 2021-11-24 | 2022-01-14 | 宁波奥克斯电气股份有限公司 | Refrigerant charging device and control method |
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| JP4179927B2 (en) * | 2003-06-04 | 2008-11-12 | 三洋電機株式会社 | Method for setting refrigerant filling amount of cooling device |
| CN1896646A (en) * | 2005-07-11 | 2007-01-17 | 海尔集团公司 | Condensate depression controller and controlling method for air-conditioner cryogen |
| KR100743720B1 (en) * | 2005-09-15 | 2007-07-30 | 엘지전자 주식회사 | Process for sensing badness of LEV in sub-cooling apparatus of multi-type air conditioner |
| JP4124228B2 (en) * | 2005-12-16 | 2008-07-23 | ダイキン工業株式会社 | Air conditioner |
| CN101153760A (en) * | 2006-09-30 | 2008-04-02 | 海尔集团公司 | Air conditioner back-heating device and its control method |
| JP4317878B2 (en) * | 2007-01-05 | 2009-08-19 | 日立アプライアンス株式会社 | Air conditioner and method for judging refrigerant amount |
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2009
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107429961A (en) * | 2015-03-31 | 2017-12-01 | 大金工业株式会社 | Refrigerating plant |
| CN107429961B (en) * | 2015-03-31 | 2018-09-25 | 大金工业株式会社 | Refrigerating plant |
| CN111094877A (en) * | 2017-09-14 | 2020-05-01 | 三菱电机株式会社 | Refrigeration cycle device and refrigeration device |
| CN111094877B (en) * | 2017-09-14 | 2021-08-10 | 三菱电机株式会社 | Refrigeration cycle device and refrigeration device |
| CN109682105A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN109682105B (en) * | 2019-02-12 | 2024-04-09 | 珠海格力电器股份有限公司 | Air Conditioning System |
| CN113932503A (en) * | 2021-11-24 | 2022-01-14 | 宁波奥克斯电气股份有限公司 | Refrigerant charging device and control method |
| CN113932503B (en) * | 2021-11-24 | 2023-04-07 | 宁波奥克斯电气股份有限公司 | Refrigerant charging device and control method |
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| Publication number | Publication date |
|---|---|
| CN101871699B (en) | 2012-10-03 |
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