CN109579349A - A kind of multi-line system and its control method reliable for operation - Google Patents
A kind of multi-line system and its control method reliable for operation Download PDFInfo
- Publication number
- CN109579349A CN109579349A CN201811479559.1A CN201811479559A CN109579349A CN 109579349 A CN109579349 A CN 109579349A CN 201811479559 A CN201811479559 A CN 201811479559A CN 109579349 A CN109579349 A CN 109579349A
- Authority
- CN
- China
- Prior art keywords
- indoor unit
- solenoid valve
- line system
- heat exchanger
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The present invention relates to a kind of multi-line system reliable for operation, the heat exchanger both ends of the indoor unit including outdoor unit and Duo Tai parallel connection, every indoor unit are respectively equipped with a solenoid valve, can either off or on into the heat exchanger refrigerant pipeline；The solenoid valve is electrically connected with control panel, and is controlled by the control panel.Its control method is；When detecting indoor unit power-off or communication abnormality, solenoid valve is closed, prevent refrigerant flows through indoor unit, avoids excessive liquid refrigerants from flowing into gas-liquid separator and cause liquid hammer risk to compressor, improves the reliability of system.
Description
Technical field
The present invention relates to a kind of air-conditioning system and control method, especially a kind of multi-line system is specifically a kind of
Multi-line system and its control method reliable for operation.
Background technique
In multi-online air-conditioning system, compressor is as core component, once it will lead to compressor there is a phenomenon where liquid hammer
Damage, influences the operational effect of entire unit.And many reason of returning liquid of compressor are generated, one of which is when one or portion
Point indoor unit because when certain reasons power off, and electronic expansion valve of indoor unit this moment be also possible to continue to one it is larger
Aperture, cause excessive liquid refrigerants without entering in gs-oil separator, keep the liquid level in gas-liquid separator excessively high, to pressure
Contracting machine causes liquid hammer risk.Such case also results in the phenomenon that system returns liquid generation, and compressor generates the risk of liquid hammer.
Currently, control is cumbersome, causes increased costs, unfavorable because the preventing structure to compressor liquid hammer is mostly more complicated
In popularization.
Summary of the invention
It is a kind of reliable for operation more the purpose of the present invention is providing for the current deficiency existing for multi-line system
On-line system and its control method, structure is simple, easy to control, and the generation of compressor liquid hammer can be effectively prevented, moreover, may be used also
It is deposited in stopped indoor unit to avoid refrigerant, it is ensured that the refrigerant of system circulation is sufficient, improves system reliability of operation.
The technical scheme is that
A kind of multi-line system reliable for operation, the indoor unit including outdoor unit and Duo Tai parallel connection, every indoor unit change
Hot device both ends are respectively equipped with a solenoid valve, can either off or on enter the room the refrigerant pipeline of machine heat exchanger；The electromagnetism
Valve is electrically connected with control panel, and is controlled by the control panel.
A kind of control method of multi-line system reliable for operation, comprising the following steps:
1) it is switched on, system operation；
2) whether detection indoor unit powers off or communication abnormality；If so, then closing the solenoid valve of indoor unit；If not, opening or protecting
Hold the unlatching of indoor unit solenoid valve；
3) it is interrupted the X time；
4) return step 2), start new circulation.
Further, the X of the step 3) is 2-3 minutes.
Beneficial effects of the present invention:
The present invention has rational design, and structure is simple, easy to control, can be when accident power-off occurs for part or all of indoor unit, resistance
Only refrigerant flows through indoor unit, and excessive liquid refrigerants is avoided to flow into gas-liquid separator and to compressor cause liquid hammer risk.Together
When, it is also ensured that the stabilization of the refrigerant quantity in system improves system reliability of operation.
Detailed description of the invention
Fig. 1 is the principle schematic diagram of present system.
Fig. 2 is control flow schematic diagram of the invention.
Wherein: 1 compressor；2- oil eliminator；3- four-way valve；4- outdoor unit heat exchanger；5- orifice union；6- indoor unit changes
Hot device；7- solenoid valve；8- electric expansion valve；9- gas-liquid separator.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of multi-line system reliable for operation, the indoor unit including outdoor unit and Duo Tai parallel connection.It has
Body connection are as follows: 1 exhaust outlet of compressor is connected on indoor set heat exchanger 6, so after oil eliminator 2 and four-way valve 3 by tracheae
Afterwards, then from the indoor set heat exchanger 6 by liquid pipe successively pass through orifice union 5, outdoor unit heat exchanger 4, four-way valve 3 and gas-liquid point
After device 9, it is connected with 1 air entry of compressor.Wherein, each indoor set heat exchanger 6 is equipped with electric expansion valve.Meanwhile
The both ends of every indoor set heat exchanger 6 are respectively equipped with a solenoid valve 7, can close or open and be connected to indoor unit heat exchange
The refrigerant pipeline of device 6, to control the coolant quantity for flowing through the indoor set heat exchanger 6.The solenoid valve 7 can be respectively arranged on and institute
It in the liquid pipe and tracheae for stating the connection of indoor set heat exchanger 6, and is electrically connected with the control panel of system, voluntarily to be controlled by system
System.
As shown in Fig. 2, the control method of above-mentioned multi-line system the following steps are included:
1) it is switched on, system operation；
2) whether detection indoor unit powers off or communication abnormality；If so, then closing the solenoid valve of indoor unit；If not, opening or protecting
Hold the unlatching of indoor unit solenoid valve；
3) it is interrupted the X time；The X is 2-3 minutes；The break time can also according to circumstances be set；
4) return step 2), start new circulation.
The invention has the advantages that
1. when refrigeration, accident power-off can occur in part or all of indoor unit but electronic expansion valve of indoor unit still keeps certain
In the case where aperture, prevents refrigerant from flowing through indoor unit by closing solenoid valve, excessive liquid refrigerants is avoided to flow into gas-liquid point
Liquid hammer risk is caused to compressor from device.
2. when heating, when the power-off of part indoor unit but in the case that electronic expansion valve of indoor unit still keeps certain aperture,
Avoid refrigerant excess accumulation inside the indoor unit to stop working caused by system circulation coolant quantity reduce caused system
High pressure is too low, arranges phenomena such as temperature is too low, and the stabilization of the refrigerant quantity in guarantee system improves system reliability of operation.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (3)
1. a kind of multi-line system reliable for operation, the indoor unit including outdoor unit and Duo Tai parallel connection, it is characterized in that every described
The heat exchanger both ends of indoor unit are respectively equipped with a solenoid valve, can either off or on enter the room the refrigerant pipe of machine heat exchanger
Road；The solenoid valve is electrically connected with control panel, and is controlled by the control panel.
2. a kind of control method of multi-line system reliable for operation, it is characterized in that the following steps are included:
1) it is switched on, system operation；
2) whether detection indoor unit powers off or communication abnormality；If so, then closing the solenoid valve of indoor unit；If not, opening or protecting
Hold the unlatching of indoor unit solenoid valve；
3) it is interrupted the X time；
4) return step 2), start new circulation.
3. the control method of multi-line system reliable for operation according to claim 2, it is characterized in that the X of the step 3)
It is 2-3 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811479559.1A CN109579349A (en) | 2018-12-05 | 2018-12-05 | A kind of multi-line system and its control method reliable for operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811479559.1A CN109579349A (en) | 2018-12-05 | 2018-12-05 | A kind of multi-line system and its control method reliable for operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109579349A true CN109579349A (en) | 2019-04-05 |
Family
ID=65927107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811479559.1A Pending CN109579349A (en) | 2018-12-05 | 2018-12-05 | A kind of multi-line system and its control method reliable for operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109579349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944757A (en) * | 2021-02-25 | 2021-06-11 | 宁波美科二氧化碳热泵技术有限公司 | Transcritical CO2Detection and maintenance method for heat pump unit group |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147824A (en) * | 2000-11-14 | 2002-05-22 | Hitachi Ltd | Air conditioner |
| CN201731693U (en) * | 2010-07-08 | 2011-02-02 | 宁波奥克斯电气有限公司 | Indoor unit of air conditioner |
| CN203869388U (en) * | 2014-03-27 | 2014-10-08 | 广东志高暖通设备股份有限公司 | Connecting tool for test on VRF air conditioner |
| CN203869167U (en) * | 2014-05-06 | 2014-10-08 | 广东美的集团芜湖制冷设备有限公司 | Multiple online air conditioner system |
| CN107477931A (en) * | 2017-08-02 | 2017-12-15 | 广东美的暖通设备有限公司 | Multiple on-line system and its indoor set power down control method |
| CN107621058A (en) * | 2017-08-29 | 2018-01-23 | 珠海格力电器股份有限公司 | Indoor unit refrigerant control device and control method thereof, indoor unit and air conditioning system |
-
2018
- 2018-12-05 CN CN201811479559.1A patent/CN109579349A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147824A (en) * | 2000-11-14 | 2002-05-22 | Hitachi Ltd | Air conditioner |
| CN201731693U (en) * | 2010-07-08 | 2011-02-02 | 宁波奥克斯电气有限公司 | Indoor unit of air conditioner |
| CN203869388U (en) * | 2014-03-27 | 2014-10-08 | 广东志高暖通设备股份有限公司 | Connecting tool for test on VRF air conditioner |
| CN203869167U (en) * | 2014-05-06 | 2014-10-08 | 广东美的集团芜湖制冷设备有限公司 | Multiple online air conditioner system |
| CN107477931A (en) * | 2017-08-02 | 2017-12-15 | 广东美的暖通设备有限公司 | Multiple on-line system and its indoor set power down control method |
| CN107621058A (en) * | 2017-08-29 | 2018-01-23 | 珠海格力电器股份有限公司 | Indoor unit refrigerant control device and control method thereof, indoor unit and air conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944757A (en) * | 2021-02-25 | 2021-06-11 | 宁波美科二氧化碳热泵技术有限公司 | Transcritical CO2Detection and maintenance method for heat pump unit group |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190405 |
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| RJ01 | Rejection of invention patent application after publication |