CN2913977Y - Piping installation of multiple air-conditioning unit - Google Patents
Piping installation of multiple air-conditioning unit Download PDFInfo
- Publication number
- CN2913977Y CN2913977Y CN 200620113187 CN200620113187U CN2913977Y CN 2913977 Y CN2913977 Y CN 2913977Y CN 200620113187 CN200620113187 CN 200620113187 CN 200620113187 U CN200620113187 U CN 200620113187U CN 2913977 Y CN2913977 Y CN 2913977Y
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- air conditioning
- refrigerant
- pipe
- handset
- balance pipe
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Abstract
The utility model discloses a pipeline device of multi-connected air conditioning unit, which comprises gas pipes, liquid pipes, oil pipes, and a balancing pipe for communicating the low-pressure side of each outdoor unit at position of gas/liquid separator of each outdoor unit. An electromagnetic valve is installed on the balancing pipe on the main machine side of the multi-connected air conditioning unit. The electromagnetic valve is opened when the multi-connected air conditioning unit is under heating mode, but closed during heating oil-balancing process. The balancing pipe is also installed with a one-way valve on sub-machine side of the multi-connected air conditioning unit, so that the refrigerant can only flow out from the sub-machine. The balancing pipe is also installed with balancing pipe cutoff valves on the main machine side and each sub-machine side of the multi-connected air conditioning unit, so as to avoid difficult startup and even damage of sub-machine due to accumulation of refrigerant when the multi-connected air conditioning unit is under heating mode while the sub-machines are stopped.
Description
Technical field
The utility model relates to air-conditioning technical, relates in particular to a kind of multiple air-conditioning unit pipe device.
Background technology
VRF Air Conditioning System is the single cooling cycle system that the direct vaporation-type indoor set by or several similar and different patterns of off-premises station linking number platform, capacity constitutes, can be to the air after or several different zones directly provide processing.VRF Air Conditioning System is with common split-type air conditioner centralization, maximization, intelligentized product, and its characteristics mainly are the indoor and outdoor machine independent assortments, independent control, and it is flexible, and the characteristics of efficient energy-saving more and more receive the concern of industry.
In the VRF Air Conditioning System, each indoor set links to each other by complicated pipelines between off-premises station, forms an enclosed pipe network system.These pipelines mainly are tracheae, liquid pipe and oil equalizing pipe.Wherein, tracheae and liquid pipe are used for system's refrigerant circulation, and during refrigerating state, refrigerant enters indoor set, returns off-premises station from tracheae from the liquid pipe; When heating state, refrigerant enters indoor set, gets back to off-premises station from the liquid pipe from tracheae.Described oil equalizing pipe is used for the oil mass between balanced each compressor of outdoor unit, guarantees the oil mass unanimity in each compressor.
Fig. 1 illustrates the pipeline connecting mode of VRF Air Conditioning System under the prior art.The following running flow process that VRF Air Conditioning System is described according to this figure.The main frame off-premises station 11 of this VRF Air Conditioning System shown in the figure, handset off-premises station 12, main frame indoor set 13, handset indoor set 14, in fact, this VRF Air Conditioning System may have a plurality of handsets, because pipeline connecting mode is identical, so a handset only is shown among the figure.
When refrigeration, the outdoor heat exchanger of this VRF Air Conditioning System is as condenser, and indoor heat exchanger is realized taking indoor heat to outdoor effect as evaporimeter.
During refrigeration, the workflow of main frame is as follows: the refrigerant of HTHP flows to outdoor heat exchanger 1103 (4,3 mouth of pipe conductings of cross valve at this moment from compressor 1101 exhaust outlets through cross valve 1102,1,2 mouth of pipe conducting), in outdoor heat exchanger 1103, be condensed into high-pressure liquid, the refrigerant of this high-pressure liquid enters high pressure reservoir 1104, then converge with the handset refrigerant, enter indoor heat exchanger 1106 and flash to low-pressure gas (heat absorption), realize indoor refrigeration through liquid pipe stop valve 1105 backs.Refrigerant after the refrigeration is through tracheae stop valve 1107, and the mouth of pipe 1 of process cross valve 1102 enters gas-liquid separator 1108 to the mouth of pipe 2 of cross valve 1102,1108 times main frame compressors 1101 of process gas-liquid separator.
The workflow of handset is as follows during refrigeration: the refrigerant of HTHP flows to outdoor heat exchanger 1203 from compressor 1201 exhaust outlets through cross valve 1202, in outdoor heat exchanger 1203, be condensed into high-pressure liquid, the refrigerant of this high-pressure liquid enters high pressure reservoir 1204, converge with the main frame refrigerant through liquid pipe stop valve 1205 backs, enter indoor heat exchanger 1206 and flash to low-pressure gas (heat absorption), realize indoor refrigeration.Refrigerant after the refrigeration is through tracheae stop valve 1207, and the mouth of pipe 1 ' of process cross valve 1202 enters gas-liquid separator 1208 to the mouth of pipe 2 ' of cross valve 1202,1208 times compressors of process gas-liquid separator.
In above-mentioned process of refrigerastion, tracheae (pipeline of tracheae stop valve is installed among Fig. 1) is communicated with the low-pressure end of compressor, because the tracheae between the main frame, handset is communicated with, so the low-pressure end of each compressor is communicated with during refrigeration.
When heating, the outdoor heat exchanger of this VRF Air Conditioning System is as evaporimeter, and indoor heat exchanger is embodied as indoor heating as condenser.
When heating, the mouth of pipe 1 of the described cross valve 1102 of main frame is communicated with the mouth of pipe 4, the mouth of pipe 2 is communicated with the mouth of pipe 3, and this moment, the host work flow process was as follows: the refrigerant of HTHP converges through tracheae stop valve 1107 and handset refrigerant through cross valve 1102 from main frame compressor 1101 exhaust outlets; Then enter indoor set 1106 and be condensed into high-pressure liquid (this process realizes heat release), again through entering high pressure reservoir 1104 behind the liquid pipe stop valve 1105, through the electric expansion valve throttling, inlet chamber external heat exchanger 1103 flashes to low-pressure gas, the refrigerant of this low-pressure gas shape enters gas-liquid separator 1108 by cross valve 1102, returns main frame compressor 1101.
When heating, the mouth of pipe 1 ' of the described cross valve 1202 of handset is communicated with the mouth of pipe 4 ', the mouth of pipe 2 ' is communicated with the mouth of pipe 3 ', and this moment, the handset workflow was as follows: the refrigerant of HTHP converges through tracheae stop valve 1207 and main frame refrigerant through cross valve 1202 from handset compressor 1201 exhaust outlets; Then enter indoor set 1206 and be condensed into high-pressure liquid (this process heat release), again through entering the high pressure reservoir behind the liquid pipe stop valve 1205, through the electric expansion valve throttling, inlet chamber external heat exchanger 1203 flashes to low-pressure gas, the refrigerant of this low-pressure gas shape enters gas-liquid separator 1208 by cross valve 1202, finally returns handset compressor 1201.
Heat in the process above-mentioned, refrigerant becomes low-pressure gas after by described outdoor heat exchanger, and as seen from the figure, this moment, the low-pressure end of each compressor was not communicated with.
Except that above-mentioned refrigeration, heat the process, VRF Air Conditioning System also has oil pipe, is used to realize equal oily process, this equal oily process is used for the oil mass of balanced compressor machine, guarantees the oil mass unanimity of each compressor chamber.
Owing to heat in the process, the low-pressure end of each compressor is not communicated with, and each off-premises station of VRF Air Conditioning System is not necessarily worked simultaneously.When handset or part handset are not worked, will cause refrigerant to be trapped in the middle of the off-premises station of shutdown, the coolant quantity that circulates in the system is reduced.
With Fig. 1 is example, when this VRF Air Conditioning System heats, if handset is not worked, because there is leakage in parts such as cross valve, electric expansion valve, check valve in the pipeline, refrigerant is accumulated in the handset side.For example, there is leakage in tracheae stop valve 1207, the refrigerant of the HTHP of main frame compressor 1101 output by this tracheae stop valve 1207 through cross valves 1202 enter gas-liquid separator 1208 (cross valve 1202 not the general mouth of pipe 1 ' and the mouth of pipe 2 ' conducting when electric, even also may there be leakage in not conducting between two mouths of pipe).Because not work of handset compressor 1201, therefore, the refrigerant that enters gas-liquid separator 1208 will constantly accumulate in gas-liquid separator 1208 with liquid form.When increasing refrigerant enters in the middle of the off-premises station of shutdown, can make a large amount of refrigerants enter compressor with liquid form, because compressor can only Compressed Gas, the above-mentioned refrigerant that exists with liquid form will cause the compressor start difficulty or damages.Simultaneously,, also can cause the refrigerant that heats in the circulation to reduce, make heating effect difference or system's fluctuation of service of in running order VRF Air Conditioning System because refrigerant constantly accumulates in the handset of shutting down.
In addition, under existing pipeline, when heating work, if handset or part handset are not worked, then the system resource that has of these handsets can not be used.For example, handset 12 is not worked, and then do not work in the whole circulation loop of handset.Yet the user does not need handset work just not need handset to provide heat energy for its room, indoor heat exchanger place, but still wishes to utilize the resources such as outdoor heat exchanger of handset, with the heat exchange efficiency of the work unit that improves.
The utility model content
At above-mentioned defective, the technical problem that the utility model solves is, a kind of piping installation of VRF Air Conditioning System is provided, this piping installation can be avoided when heating, the do not work refrigerant that causes of handset or part handset accumulates in the problem of the handset of not working, avoid the refrigerant accumulation to make idle handset compressor operating difficulty or damage, and avoid heating the refrigerant minimizing in the circulation, influence heating effect and cause system's fluctuation of service.In addition, this piping installation can also make VRF Air Conditioning System can utilize the outdoor heat exchanger of the handset of shutdown, improves heat exchange efficiency.
The piping installation of the VRF Air Conditioning System that the utility model provides comprises:
The piping installation of the VRF Air Conditioning System that the utility model provides comprises tracheae, liquid pipe, oil pipe, also comprises the balance pipe that is communicated with each off-premises station low-pressure side.
Preferably, the particular location of described balance pipe connection is each off-premises station gas-liquid separator.
Preferably, described balance pipe is equipped with magnetic valve.
Preferably, described magnetic valve is installed in the host computer side of described VRF Air Conditioning System.
Preferably, described magnetic valve is that described VRF Air Conditioning System is opened when heating, but in heating equal oily process electromagnetic valve closed.
Preferably, described balance pipe is equipped with check valve.
Preferably, described check valve is installed in the handset side of described VRF Air Conditioning System, and the refrigerant that makes of this check valve can only flow out from this handset.
Preferably, described balance pipe is equipped with the balance pipe stop valve.
Preferably, described balance pipe stop valve is installed on the balance pipe of the host computer side of described VRF Air Conditioning System and each handset side
By in pipeline, increasing the refrigerant balance pipe, can be achieved as follows useful effect.
1, avoided because refrigerant accumulates, and made handset start difficulty even damage etc.
In the middle of heating operation; because the leakage of parts flows in the middle of the off-premises station of shutting down refrigerant; cause the off-premises station of shutting down low pressure more and more higher; refrigerant will be to be stored in liquid form in the elements such as gas-liquid separator in a large number; may cause handset compressor start difficulty, even damage compressor owing to liquid refrigerants enters.The subsidiary loop that the refrigerant in the process flows that heats by the foundation of refrigerant balance pipe; the low pressure of the off-premises station of the off-premises station of shutdown and running is consistent; the refrigerant that enters the handset of shutdown flows out by balance pipe; thoroughly solve the refrigerant accumulation to the problem that system causes, avoid parts such as cross valve, electric expansion valve, check valve to leak the harm that system is caused.
2, avoid because the reduction of work unit heating efficiency or the system's fluctuation of service that refrigerant runs off and causes.
In original system; heat in the process and do not work as if the part handset, then refrigerant finally causes the refrigerant of operate as normal circulation to reduce gradually owing to reasons such as element leakage constantly accumulate in the handset of shutting down; the heating efficiency of reduction work unit, or make the fluctuation of service of system.After adopting the refrigerant balance pipe because refrigerant can't can be avoided the loss of the refrigerant of operate as normal circulation in the handset place accumulation of shutting down, and and then avoid the heating efficiency of work unit to reduce, system also is able to stable operation.
3, use the refrigerant balance pipe can also improve heat exchange efficiency.
By the design of refrigerant balance pipe, in heating operation, can utilize the off-premises station heat exchanger of the unit of shutdown, improve system's heat exchange efficiency.In the original system design, each off-premises station heat exchanger is separate during heating operation, can only utilize the heat exchanger of self to carry out the exchange of energy.After the refrigerant balance pipe is installed; because the low pressure of the low pressure of the off-premises station of shutting down and running off-premises station is consistent; therefore can utilize the heat exchanger of the off-premises station of shutdown; after making refrigerant enter this heat exchanger to carry out abundant heat exchange evaporation; enter the low-pressure side of running off-premises station again by the refrigerant balance pipe; thereby heat exchange efficiency is significantly improved, reaches the purpose that improves running efficiency of system.
Description of drawings
Fig. 1 is the piping diagram of prior art VRF Air Conditioning System;
Fig. 2 is the VRF Air Conditioning System piping diagram of the utility model first embodiment.
The specific embodiment
Please, be the VRF Air Conditioning System piping diagram of the utility model first embodiment referring to Fig. 2.This figure is an improved pipeline on Fig. 1 basis, and parts identical with Fig. 1 among Fig. 2 adopt identical label, explanation no longer in addition.
As can be seen from the figure 2, compared to Figure 1, this VRF Air Conditioning System is except that having pipelines such as oil equalizing pipe, tracheae, liquid pipe, between the gas-liquid separator 1208 of main frame gas-liquid separator 1108 and handset, the employing pipeline links to each other, and this pipeline is called as balance pipe (thick line among the figure).This balance pipe near on the pipeline position of described gas-liquid separator 1108, is equipped with magnetic valve 1110 in main frame one side.In addition, this balance pipe main frame one side also is equipped with balance pipe stop valve 1109.In handset one side, this balance pipe is equipped with balance pipe stop valve 1209, and check valve 1210, and this check valve makes the refrigerant can only be by flowing out from handset gas-liquid separator 1208.
When this VRF Air Conditioning System is operated in when heating state, the described magnetic valve 1110 on this balance pipe is opened.Because described main frame compressor 1101 work are so set up low-pressure state in gas-liquid separator 1,108 one sides.Handset compressor 1201 is not worked, so gas-liquid separator 1208 place's pressure of handset are higher, because gas can be moved to low pressure by high pressure, so the refrigerant of the gaseous state that should locate will flow to main frame through check valve 1210 and balance pipe stop valve 1209, in main frame one side, flow to gas-liquid separator 1108 through balance pipe stop valve 1109 and the magnetic valve 1110 that is in opening, finally get back to the main frame compressor.Because the foundation of the subsidiary loop that above-mentioned refrigerant flows,, refrigerant can not accumulated in handset one side because element leakage etc. are former thereby refrigerant that enter the handset of not starting shooting can flow to the low-pressure side of main frame.
The refrigerant balance pipe can also make the outdoor heat exchanger 1203 of the handset 12 of shutdown obtain utilizing, thereby improve heat exchange efficiency except that above effect.At this moment, handset electric expansion valve 1211 is opened, and made the mouth of pipe 3 ' and the mouth of pipe 4 ' conducting of cross valve 1202.The fan starting of outdoor heat exchanger 1203.Because main frame is connected with the liquid pipe of handset, therefore, refrigerant can enter described high pressure reservoir 1204 by the refrigerant of handset, and further flows to outdoor heat exchanger 1203, at outdoor heat exchanger 1203 evaporations and absorption heat, becomes low-pressure gas.This low-pressure gas enters the mouth of pipe 4 ' through the mouth of pipe 3 ' of described cross valve 1202, finally enters gas-liquid separator 1208.Enter the refrigerant behind the gas-liquid separator 1208, by the subsidiary loop that described refrigerant flows, the low-pressure side that enters the main frame compressor 1101 in the work by balance pipe.By above-mentioned closed circuit, in fact make the outdoor heat exchanger 1203 of handset obtain to utilize, thereby improve heat exchange efficiency.
Should illustrate that in heating equal oily process, the magnetic valve 1110 on should Shutdown Hosts refrigerant balance pipe makes the low pressure of main frame and handset relatively independent, it is poor to set up equal oil pressure, guarantees equal oily effect.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (9)
1, a kind of piping installation of VRF Air Conditioning System comprises tracheae, liquid pipe, oil pipe, also comprises: the balance pipe that is communicated with each off-premises station low-pressure side.
2, device according to claim 1 is characterized in that, the particular location that described balance pipe is communicated with is each off-premises station gas-liquid separator.
3, device according to claim 1 is characterized in that, described balance pipe is equipped with magnetic valve.
4, device according to claim 3 is characterized in that, described magnetic valve is installed in the host computer side of described VRF Air Conditioning System.
5, device according to claim 4 is characterized in that, described magnetic valve is that described VRF Air Conditioning System is opened when heating, but in heating equal oily process electromagnetic valve closed.
6, device according to claim 1 is characterized in that, described balance pipe is equipped with check valve.
7, require 5 described devices according to the right profit, it is characterized in that, described check valve is installed in the handset side of described VRF Air Conditioning System, and this check valve can only flow out refrigerant from this handset.
8, device according to claim 1 is characterized in that, described balance pipe is equipped with the balance pipe stop valve.
9, device according to claim 8 is characterized in that, described balance pipe stop valve is installed on the balance pipe of the host computer side of described VRF Air Conditioning System and each handset side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620113187 CN2913977Y (en) | 2006-04-27 | 2006-04-27 | Piping installation of multiple air-conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620113187 CN2913977Y (en) | 2006-04-27 | 2006-04-27 | Piping installation of multiple air-conditioning unit |
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| Publication Number | Publication Date |
|---|---|
| CN2913977Y true CN2913977Y (en) | 2007-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620113187 Expired - Fee Related CN2913977Y (en) | 2006-04-27 | 2006-04-27 | Piping installation of multiple air-conditioning unit |
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| CN (1) | CN2913977Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806376A (en) * | 2010-04-01 | 2010-08-18 | 中国建筑第七工程局有限公司 | Method for mounting coolant pipes of air conditioning system |
| CN101063567B (en) * | 2006-04-27 | 2011-05-11 | 海尔集团公司 | Multiple air-conditioning unit pipe device |
| CN104048453A (en) * | 2013-03-12 | 2014-09-17 | 珠海格力电器股份有限公司 | Oil-equalizing control method for compressor system and multi-compressor parallel system |
-
2006
- 2006-04-27 CN CN 200620113187 patent/CN2913977Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063567B (en) * | 2006-04-27 | 2011-05-11 | 海尔集团公司 | Multiple air-conditioning unit pipe device |
| CN101806376A (en) * | 2010-04-01 | 2010-08-18 | 中国建筑第七工程局有限公司 | Method for mounting coolant pipes of air conditioning system |
| CN101806376B (en) * | 2010-04-01 | 2013-02-27 | 中国建筑第七工程局有限公司 | Method for mounting coolant pipes of air conditioning system |
| CN104048453A (en) * | 2013-03-12 | 2014-09-17 | 珠海格力电器股份有限公司 | Oil-equalizing control method for compressor system and multi-compressor parallel system |
| CN104048453B (en) * | 2013-03-12 | 2016-01-06 | 珠海格力电器股份有限公司 | The equal oily control method of compressor assembly and Multi-compressor parallel system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070620 Termination date: 20150427 |
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| EXPY | Termination of patent right or utility model |