CN115717741A - Multi-split central air conditioning system - Google Patents
Multi-split central air conditioning system Download PDFInfo
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- CN115717741A CN115717741A CN202211461106.2A CN202211461106A CN115717741A CN 115717741 A CN115717741 A CN 115717741A CN 202211461106 A CN202211461106 A CN 202211461106A CN 115717741 A CN115717741 A CN 115717741A
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Abstract
The embodiment of the invention discloses a multi-split central air-conditioning system which comprises a compressor, a heat exchanger and an economizer, wherein the compressor is provided with an air suction port, an air exhaust port and an air supplement port, the heat exchanger is provided with a first channel and a second channel, the first channel is communicated with the air exhaust port, the second channel is suitable for being connected with an outdoor unit, the economizer is provided with a first cavity, a first liquid inlet, a first liquid outlet and a first air outlet, the first liquid inlet, the first liquid outlet and the first air outlet are communicated with the first cavity, the first air outlet is communicated with the air supplement port, the first liquid outlet is communicated with the air suction port, the multi-split central air-conditioning system is provided with a refrigerating working condition and a heating working condition, the first channel is communicated with the air exhaust port, and the first channel is communicated with the first liquid outlet in the heating working condition. The multi-split central air-conditioning system provided by the embodiment of the invention saves an oil-way system, eliminates the possibility of compressor abrasion caused by an oil return problem, and improves the reliability and the heat exchange efficiency of the system.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split central air-conditioning system.
Background
The multi-split air conditioning system is composed of a plurality of air conditioning devices, and can realize free combination of a plurality of outdoor units and a plurality of indoor units. At present, a multi-split central air conditioning system on the market mostly adopts a scroll compressor, the scroll compressor uses a three-phase asynchronous motor to work, the three-phase asynchronous motor drives a bearing to rotate through a crankshaft, and the bearing drives a rotating disc to rotate so as to realize the compression process.
Lubricating oil is generally required to be arranged between the crankshaft and the bearing so as to reduce friction and mechanical loss, however, the arrangement of the lubricating oil causes the circulation of the lubricating oil in outdoor and indoor pipeline systems, and further structures such as oil cooling and oil separators need to be arranged, so that the difficulty in managing and controlling the structures such as the oil cooling and oil separators and the cost for maintaining an oil way are increased.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a multi-split central air-conditioning system, which saves an oil-way system, eliminates the possibility of abrasion of a compressor caused by an oil return problem, and improves the reliability and the heat exchange efficiency of the system.
The multi-split central air-conditioning system of the embodiment of the invention comprises: the compressor is used for compressing and conveying refrigerant vapor and is provided with a suction port, an exhaust port and an air supplement port, wherein the suction port is used for sucking low-temperature low-pressure refrigerant gas, the exhaust port is used for discharging high-temperature high-pressure refrigerant gas, and the air supplement port is used for supplementing the refrigerant gas into the compressor;
the heat exchanger is provided with a first channel and a second channel, and the second channel is suitable for being connected with an outdoor unit and communicated with a loop of the outdoor unit;
the economizer is used for flashing liquid refrigerant and is provided with a first cavity, a first liquid inlet, a first liquid outlet and a first gas outlet, the first liquid inlet, the first liquid outlet and the first gas outlet are communicated with the first cavity, the first gas outlet is communicated with the gas supplementing port, the first liquid outlet is communicated with the gas suction port, the liquid refrigerant flashes in the first cavity to form gaseous refrigerant and liquid refrigerant, the gaseous refrigerant is discharged into the gas supplementing port through the first gas outlet, and the liquid refrigerant is discharged through the first liquid outlet;
the multi-split central air conditioning system is provided with a refrigerating working condition and a heating working condition, the first channel is communicated with the exhaust port under the refrigerating working condition, the high-temperature and high-pressure refrigerant gas in the compressor is introduced into the first channel through the exhaust port, the high-temperature and high-pressure refrigerant gas in the first channel exchanges heat with the refrigerant in the loop of the outdoor unit, and the first channel is communicated with the first liquid outlet under the heating working condition.
In the multi-split central air-conditioning system of the embodiment of the invention, the air suction port of the compressor sucks low-temperature low-pressure refrigerant gas, and the low-temperature low-pressure refrigerant gas is changed into high-temperature high-pressure refrigerant gas in the compressor. During the refrigeration operating mode, high-temperature high-pressure refrigerant gas is discharged into a first channel of a heat exchanger through an exhaust port, heat exchange is carried out between refrigerant in an outdoor unit loop and high-temperature high-pressure refrigerant gas in the first channel, the high-temperature high-pressure refrigerant gas in the first channel is condensed to form liquid refrigerant, the liquid refrigerant enters an economizer and flashes in a first cavity, the liquid refrigerant in the first cavity is discharged through a first liquid outlet, gaseous refrigerant in the first cavity is discharged into an air supplement port through a first gas outlet to supplement the refrigerant gas for a compressor, the power consumption of the compressor is reduced, and therefore the energy consumption of the multi-split central air conditioning system is reduced.
When the multi-split central air conditioning system is in a heating working condition, high-temperature and high-pressure refrigerant gas is discharged to the economizer through the exhaust port and flashes in the economizer, liquid refrigerant in the first cavity flows into the first channel through the first liquid outlet and exchanges heat with an outdoor unit loop, gaseous refrigerant in the first cavity is discharged into the air supplementing port through the first gas outlet to supplement the refrigerant gas for the compressor, so that the power consumption of the compressor is reduced, the energy consumption of the multi-split central air conditioning system is reduced, an oil path system is omitted in the multi-split central air conditioning system in the embodiment of the application compared with the prior art, the possibility of abrasion of the compressor caused by the oil return problem is eliminated, the maintenance cost of the oil path system is saved, and the reliability and the heat exchange efficiency are improved.
In some embodiments, the multi-split central air conditioning system further comprises a liquid storage tank, the liquid storage tank is connected with the heat exchanger and the economizer, the liquid storage tank is provided with a second chamber, a first opening and a second opening, the first opening and the second opening are communicated with the second chamber, and the compressor is further provided with a second liquid inlet and a second air outlet;
under the refrigerating working condition, the first opening is communicated with the first channel, and the second opening is communicated with the second liquid inlet;
under the heating working condition, the first opening is communicated with the air exhaust port, and the second opening is communicated with the second liquid inlet.
In some embodiments, the multi-split central air conditioning system further includes a gas-liquid separator, the gas-liquid separator includes a first inlet, a second inlet, and a first outlet, the first inlet communicates with the first liquid outlet, the first outlet communicates with the suction port, the second inlet communicates with the second gas outlet, the first inlet communicates with the first passage, the first outlet communicates with the suction port, and the second inlet communicates with the second gas outlet in the heating condition.
In some embodiments, the multi-split central air conditioning system further comprises an indoor unit having a third opening and a fourth opening;
under the refrigeration working condition, the third opening is communicated with the first liquid outlet, and the fourth opening is communicated with the first inlet;
and under the heating working condition, the third opening is communicated with the first opening, and the fourth opening is communicated with the exhaust port.
In some embodiments, the multi-split central air conditioning system further comprises a reversing valve having a fifth opening, a sixth opening, a seventh opening, and an eighth opening;
in the cooling condition, the fifth opening is communicated with the exhaust port and the sixth opening, the sixth opening is communicated with the first channel, the seventh opening is communicated with the eighth opening and the first inlet, and the eighth opening is communicated with the fourth opening;
under the heating working condition, the fifth opening is communicated with the exhaust port and the eighth opening, the eighth opening is communicated with the fourth opening, the sixth opening is communicated with the seventh opening and the first channel, and the seventh opening is communicated with the first inlet.
In some embodiments, the multi-split central air conditioning system further includes:
the first pipeline is communicated with the air suction port and the first outlet, the first control valve is arranged on the first pipeline, and the first control valve is used for controlling the on-off of the first outlet and the air suction port;
the second pipeline is communicated with the first air outlet and the air supplementing port, the second control valve is arranged on the second pipeline, and the second control valve is used for controlling the connection and disconnection of the first air outlet and the air supplementing port;
the third pipeline is communicated with the air suction port and the air exhaust port, the electromagnetic valve is arranged on the third pipeline and is used for preventing gaseous refrigerant in the compressor from flowing backwards when the compressor is stopped;
the fourth pipeline is communicated with the second opening and the first liquid inlet, the first throttling valve is arranged on the fourth pipeline, and the first throttling valve is used for throttling part of refrigerant in the liquid storage tank into gas-liquid mixed refrigerant;
the fifth pipeline is communicated with the second opening and the second liquid inlet, and the fifth throttling valve is arranged on the fifth pipeline;
the sixth pipeline is communicated with the first liquid outlet and the first channel, and the third throttle is arranged on the sixth pipeline.
In some embodiments, the multi-split central air conditioning system further includes:
a seventh line communicating the first passage and the first opening, and a first valve provided on the seventh line for controlling the flow of the refrigerant in the first passage from the first passage into the second chamber;
an eighth pipeline and a second valve, wherein the eighth pipeline is communicated with the first liquid outlet and the third opening, and the second valve is arranged on the eighth pipeline and is used for controlling the liquid refrigerant in the first chamber to flow into the indoor unit from the first chamber;
a ninth pipe communicating the first opening and the third opening, and a third valve provided on the ninth pipe for controlling the flow of the refrigerant inside the indoor unit from the indoor unit into the second chamber;
a fourth valve disposed on the sixth line proximate the first passage for controlling the flow of liquid refrigerant from within the second chamber into the first passage.
In some embodiments, the compressor includes a first compressor and a second compressor, the air inlets include a first air inlet provided on the first compressor and a second air inlet provided on the second compressor, the first air inlet communicates with the first liquid outlet, the air outlets include a first air outlet provided on the first compressor and a second air outlet provided on the second compressor, the first air inlet communicates with the first air outlet, the second air inlet communicates with the second air outlet, the second air outlet is used for discharging refrigerant gas with high temperature and high pressure, and the first air outlet communicates with the second air inlet.
In some embodiments, the multi-split central air conditioning system further includes a motor for driving the compressor.
In some embodiments, the economizer further has a liquid level gauge disposed within the first chamber for reflecting liquid refrigerant within the first chamber.
Drawings
Fig. 1 is a schematic view of a multi-split central air conditioning system according to an embodiment of the present invention.
Fig. 2 is a schematic view of a portion a of fig. 1.
Reference numerals: 1. a compressor; 11. a first stage compressor; 12. a secondary compressor; 13. a first air intake port; 14. a second exhaust port; 15. an air supplement port; 16. a second liquid inlet; 17. a second air outlet; 2. a heat exchanger; 21. a second channel; 22. a first port; 23. a second port; 3. an economizer; 31. a first chamber; 32. a first liquid inlet; 33. a first liquid outlet; 34. a first air outlet; 4. a liquid storage tank; 41. a second chamber; 42. a first opening; 43. a second opening; 5. a gas-liquid separator; 51. a first inlet; 52. a second inlet; 53. a first outlet; 6. an indoor unit; 61. a third opening; 62. a fourth opening; 7. a diverter valve; 71. a fifth opening; 72. a sixth opening; 73. a seventh opening; 74. an eighth opening; 8. an outdoor unit; 9. a motor; 101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 107. a seventh pipeline; 108. an eighth pipeline; 109. a ninth pipeline; 201. a first control valve; 202. a second control valve; 203. a first solenoid valve; 204. a first throttle valve; 205. a second throttle valve; 206. a third throttle valve; 207. a first valve; 208. a second valve; 209. a third valve; 210. and a fourth valve.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 2, the multi-split central air conditioning system according to the embodiment of the present invention includes a compressor 1, a heat exchanger 2, and an economizer 3.
The compressor 1 is used for compressing and delivering refrigerant vapor, the compressor 1 has a suction port for sucking low-temperature and low-pressure refrigerant gas, a discharge port for discharging high-temperature and high-pressure refrigerant gas, and a gas supplementing port 15 for supplementing refrigerant gas into the compressor 1.
The heat exchanger 2 has a first passage (not shown) and a second passage 21, and the second passage 21 is adapted to be connected to the outdoor unit 8 and to communicate with the loop of the outdoor unit 8. Specifically, the first passage includes a first port 22 and a second port 23, the first port 22 being located at one end of the first passage, the second port 23 being located at the other end of the first passage, the first port 22 and the second port 23 being in communication with the first passage.
The economizer 3 is used for flashing liquid refrigerant, the economizer 3 is provided with a first chamber 31, a first liquid inlet 32, a first liquid outlet 33 and a first gas outlet 34, the first liquid inlet 32, the first liquid outlet 33 and the first gas outlet 34 are communicated with the first chamber 31, the first gas outlet 34 is communicated with the gas supplementing opening 15, the first liquid outlet 33 is communicated with the gas suction opening, the liquid refrigerant flashes in the first chamber 31 to form gaseous refrigerant and liquid refrigerant, the gaseous refrigerant is discharged into the gas supplementing opening 15 through the first gas outlet 34, and the liquid refrigerant is discharged through the first liquid outlet 33. Specifically, flash vaporization refers to a gas generated by vaporization of a portion of liquid refrigerant due to a sudden drop in pressure.
The multi-split central air conditioning system has a refrigeration working condition and a heating working condition, the first channel is communicated with the exhaust port in the refrigeration working condition, high-temperature and high-pressure refrigerant gas in the compressor 1 is introduced into the first channel through the exhaust port, the high-temperature and high-pressure refrigerant gas in the first channel and refrigerant in a loop of the outdoor unit 8 perform heat exchange, and the first channel is communicated with the first liquid outlet 33 in the heating working condition.
Specifically, during a cooling condition, the first port 22 is communicated with the exhaust port, high-temperature and high-pressure refrigerant gas is discharged into the first channel of the heat exchanger 2 through the exhaust port, the refrigerant in the loop of the outdoor unit 8 exchanges heat with the high-temperature and high-pressure refrigerant gas in the first channel, the high-temperature and high-pressure refrigerant gas in the first channel is condensed to form liquid refrigerant, the liquid refrigerant enters the economizer 3 and flashes in the first chamber 31, the liquid refrigerant in the first chamber 31 is discharged through the first liquid outlet 33, and gaseous refrigerant in the first chamber 31 is discharged into the air supplement port 15 through the first air outlet 34 to supplement the refrigerant gas for the compressor 1, so that the power consumption of the compressor 1 is reduced, and therefore, the energy consumption of the multi-split central air conditioning system of the embodiment of the present application is reduced.
When the multi-split central air-conditioning system is in a heating working condition, the second port 23 is communicated with the first liquid outlet 33, high-temperature and high-pressure refrigerant gas is discharged to the economizer 3 through the exhaust port and is flashed in the economizer 3, liquid refrigerant in the first chamber 31 flows into the first channel through the first liquid outlet 33 and exchanges heat with the loop of the outdoor unit 8, gaseous refrigerant in the first chamber 31 is discharged into the air supplement port 15 through the first air outlet 34 to supplement the refrigerant gas for the compressor 1, so that the power consumption of the compressor 1 is reduced, and the energy consumption of the multi-split central air-conditioning system in the embodiment of the application is reduced.
Compared with the prior art, the multi-split central air-conditioning system provided by the embodiment of the invention omits an oil-way system, thereby not only eliminating the possibility of abrasion of the compressor 1 caused by the oil return problem and the possibility of low heat exchange efficiency of the heat exchanger 2 caused by the existence of an oil film, but also saving the maintenance cost of the oil-way system and improving the reliability.
In some embodiments, the multi-split central air conditioning system further comprises a liquid storage tank 4. The liquid storage tank 4 is connected with the heat exchanger 2 and the economizer 3. The liquid storage tank 4 has a second chamber 41, a first opening 42 and a second opening 43, the first opening 42 and the second opening 43 are communicated with the second chamber 41, and the compressor 1 further has a second liquid inlet 16 and a second gas outlet 17. Specifically, the tank body of the liquid storage tank 4 adopts a vertical or horizontal single-layer or double-layer structure.
In the cooling mode, the first opening 42 communicates with the first passage, and the second opening 43 communicates with the second intake port 16. Specifically, the second port 23 communicates with the first opening 42, and the second opening 43 communicates with the first and second intake ports 32 and 16. Liquid refrigerant formed after condensation of high-temperature and high-pressure refrigerant gas in the first channel flows into the second chamber 41 through the first opening 42, part of the liquid refrigerant in the second chamber 41 enters the compressor 1 through the second liquid inlet 16 and is heated and evaporated in the compressor 1 to be gaseous refrigerant, part of the liquid refrigerant and part of the gaseous refrigerant in the second chamber 41 enter the economizer 3 through the second liquid inlet 16 and are flashed in the economizer 3, the flashed gaseous refrigerant enters the compressor 1 through the air supplementing port 15 and is supplemented with air for the compressor 1, and the flashed liquid refrigerant is discharged through the first liquid outlet 33.
In the heating condition, the first opening 42 communicates with the exhaust port, and the second opening 43 communicates with the second intake port 16. Specifically, the exhaust port communicates with the first inlet port 42, and the second opening 43 communicates with the second inlet port 16 and the first inlet port 32. High-temperature and high-pressure refrigerant gas enters the second chamber 41 through the first opening 42, part of liquid refrigerant in the second chamber 41 enters the compressor 1 through the second liquid inlet 16 and is heated and evaporated in the compressor 1 to be gaseous refrigerant, part of liquid refrigerant and part of gaseous refrigerant in the second chamber 41 enter the economizer 3 through the second liquid inlet 16 and are flashed in the economizer 3, the flashed gaseous refrigerant enters the compressor 1 through the air supplementing port 15 and is supplemented for the compressor 1, the flashed liquid refrigerant is discharged into the first channel through the first liquid outlet 33, the liquid refrigerant absorbs heat of the gaseous refrigerant in the loop of the outdoor unit 8 in the first channel and is evaporated to be gaseous refrigerant, and then the gaseous refrigerant in the first channel is discharged through the first port 22 and enters the air suction port.
Therefore, an oil way system is omitted from the multi-split central air-conditioning system, structures such as oil cooling and oil separators are omitted, and the management and control difficulty and the oil way maintenance cost are reduced.
In some embodiments, the multi-split central air conditioning system further includes a gas-liquid separator 5, the gas-liquid separator 5 has a first inlet 51, a second inlet 52 and a first outlet 53, the first inlet 51 is communicated with the first liquid outlet 33 in the cooling mode, the first outlet 53 is communicated with the suction port, the second inlet 52 is communicated with the second air outlet 17, the first inlet 51 is communicated with the first channel in the heating mode, the first outlet 53 is communicated with the suction port, and the second inlet 52 is communicated with the second air outlet 17.
Specifically, the gas-liquid separator 5 is configured to separate a gaseous refrigerant from a gas/liquid mixed refrigerant, the gaseous refrigerant enters the suction port from the first outlet 53, and the liquid refrigerant is stored in the gas-liquid separator 5, so that the liquid refrigerant is not easy to enter the compressor 1, which not only protects the compressor 1, but also enables the multi-split central air conditioning system of the embodiment of the present application to complete a cycle.
In some embodiments, the multi-split central air conditioning system further comprises an indoor unit 6. The indoor unit 6 has a third opening 61 and a fourth opening 62. In the cooling mode, the third opening 61 is communicated with the first liquid outlet 33, and the fourth opening 62 is communicated with the first inlet 51. In the heating condition, the third opening 61 communicates with the first opening 42, and the fourth opening 62 communicates with the exhaust port.
Specifically, during a refrigeration working condition, the liquid refrigerant flashed in the first chamber 31 flows into the indoor unit 6 through the first liquid outlet 33, the liquid refrigerant is throttled by the throttle valve of the indoor unit 6, then the liquid refrigerant absorbs heat of inlet air of the indoor unit 6 and evaporates into a gaseous refrigerant, the gaseous refrigerant enters the first inlet 51 through the fourth opening 62, and the gaseous refrigerant further undergoes gas-liquid separation in the gas-liquid separator 5 and then enters the air suction port, so that the liquid refrigerant is prevented from entering the compressor 1, and the protection of the compressor 1 is further enhanced.
In the heating working condition, the high-temperature high-pressure gaseous refrigerant in the compressor 1 enters the indoor unit 6 through the fourth opening 62 and dissipates heat to the indoor unit 6 to supply air, the high-temperature high-pressure gaseous refrigerant is condensed into the medium-temperature high-pressure liquid refrigerant, then the medium-temperature high-pressure liquid refrigerant is throttled into the gas/liquid mixed refrigerant and enters the second chamber 41 through the third opening 61 and the first opening 42, part of the gas/liquid mixed refrigerant enters the compressor 1 through the second liquid inlet 16 and is heated and evaporated into the gaseous refrigerant in the compressor 1, and then the gaseous refrigerant enters the air suction port after passing through the gas-liquid separator 5.
Part gas/liquid mixture state refrigerant flashes in economizer 3, and gaseous state refrigerant after the flashing gets into compressor 1 and for compressor 1 tonifying qi through tonifying qi mouth 15, and the liquid refrigerant after the flashing is discharged into the first passageway through first liquid outlet 33, and liquid refrigerant absorbs the heat of the gaseous state refrigerant in the 8 loops of off-premises station in the first passageway and evaporates to gaseous state refrigerant, and the gaseous state refrigerant in the first passageway is discharged and is gone into the induction port through first mouthful 22 afterwards.
In some embodiments, the multi-split central air conditioning system further comprises a reversing valve 7. The directional valve 7 has a fifth opening 71, a sixth opening 72, a seventh opening 73 and an eighth opening 74. In the cooling mode, the fifth opening 71 is in communication with the discharge port and the sixth opening 72, the sixth opening 72 is in communication with the first passage, the seventh opening 73 is in communication with the eighth opening 74 and the first inlet 51, and the eighth opening 74 and the fourth opening 62. In the heating condition, the fifth opening 71 communicates with the exhaust port and the eighth opening 74, the eighth opening 74 communicates with the fourth opening 62, the sixth opening 72 communicates with the seventh opening 73 and the first passage, and the seventh opening 73 communicates with the first inlet 51. Specifically, the reversing valve 7 is a four-way reversing valve, and plays a role in refrigeration and heating conversion in the multi-split central air-conditioning system in the embodiment of the application, and the conversion mode is simple and easy to operate.
In some embodiments, the multi-split central air conditioning system further comprises a first pipe 101, a second pipe 102, a third pipe 103, a fourth pipe 104, a fifth pipe 105, a sixth pipe 106, a first control valve 201, a second control valve 202, a first solenoid valve 203, a first throttle valve 204, a second throttle valve 205, and a third throttle valve 206. The first pipeline 101 is communicated with the air suction port and the first outlet 53, the first control valve 201 is arranged on the first pipeline 101, and the first control valve 201 is used for controlling the on-off of the first outlet 53 and the air suction port. The second pipeline 102 is communicated with the first air outlet 34 and the air supplement opening 15, the second control valve 202 is arranged on the second pipeline 102, and the second control valve 202 is used for controlling the on-off of the first air outlet 34 and the air supplement opening 15.
Specifically, the first control valve 201 and the second control valve 202 are regulating valves, the first control valve 201 is for regulating the flow rate of the gaseous refrigerant in the gas-liquid separator 5 flowing into the suction port, and the second control valve 202 is for regulating the flow rate of the gaseous refrigerant in the first chamber 31 flowing into the suction port 15.
The third pipeline 103 is communicated with the suction port and the exhaust port, the first electromagnetic valve 203 is arranged on the third pipeline 103, and the first electromagnetic valve 203 is used for preventing the gaseous refrigerant in the compressor 1 from flowing backwards when the compressor 1 stops. The fourth pipeline 104 is communicated with the second opening 43 and the first liquid inlet 32, a first throttle valve 204 is arranged on the fourth pipeline 104, and the first throttle valve 204 is used for throttling part of the refrigerant in the liquid storage tank 4 into the refrigerant in a gas-liquid mixed state. The fifth pipeline 105 is communicated with the second opening 43 and the second liquid inlet 16, and a fifth throttling valve is arranged on the fifth pipeline 105. The sixth pipe 106 communicates the first liquid outlet 33 and the first passage, and the third throttle valve 206 is provided on the sixth pipe 106.
In some embodiments, the multi-split central air conditioning system further includes a seventh pipe 107, an eighth pipe 108, a ninth pipe 109, a first valve 207, a second valve 208, a third valve 209, and a fourth valve 210. The seventh pipe 107 communicates the first passage with the first opening 42, and a first valve 207 is provided on the seventh pipe 107 for controlling the flow of the refrigerant in the first passage from the first passage into the second chamber 41. An eighth pipe 108 connects the first outlet port 33 and the third port 61, and a second valve 208 is provided on the eighth pipe 108 for controlling the flow of the liquid refrigerant in the first chamber 31 from the first chamber 31 into the indoor unit 6. The ninth pipe line 109 communicates the first opening 42 and the third opening 61, and the third valve 209 is provided in the ninth pipe line 109 for controlling the refrigerant in the indoor unit 6 to flow from the indoor unit 6 into the second chamber 41. A fourth valve 210 is disposed on the sixth line 106, and the fourth valve 210 is adjacent to the first passage for controlling the flow of the liquid refrigerant in the second chamber 41 from the second chamber 41 into the first passage. Specifically, the first valve 207, the second valve 208, the third valve 209, and the fourth valve 210 are all one-way valves.
Specifically, during a cooling operation, the high-temperature and high-pressure refrigerant gas in the compressor 1 enters the first channel through the fifth opening 71, the sixth opening 72 and the first port 22, the high-temperature and high-pressure refrigerant gas exchanges heat with the loop of the outdoor unit 8 in the first channel to condense the high-temperature and high-pressure refrigerant gas into a liquid refrigerant, the liquid refrigerant flows into the second chamber 41 through the seventh pipeline 107 communicated between the second port 23 and the first opening 42, and a part of the liquid refrigerant in the second chamber 41 enters the compressor 1 through the fifth pipeline 105 communicated between the second opening 43 and the second liquid inlet 16 and is heated and evaporated into a gaseous refrigerant in the compressor 1.
Part of liquid refrigerant and part of gaseous refrigerant in the second chamber 41 enter the economizer 3 through a fourth pipeline 104 communicated between the second opening 43 and the first liquid inlet 32 and are flashed in the first chamber 31, the flashed gaseous refrigerant enters the compressor 1 through the second pipeline 102 and the air supplementing port 15 and supplements air for the compressor 1, the flashed liquid refrigerant enters the indoor unit 6 through an eighth pipeline 108, the liquid refrigerant is throttled by a throttle valve of the indoor unit 6 and then absorbs heat of inlet air of the indoor unit 6 to be evaporated into the gaseous refrigerant, the gaseous refrigerant enters the gas-liquid separator 5 through the fourth opening 62, the eighth opening 74 and the seventh opening 73 in sequence to be separated, and then the gaseous refrigerant in the gas-liquid separator 5 enters the compressor 1 through the air suction port.
In a heating working condition, high-temperature and high-pressure refrigerant gas in the compressor 1 enters the indoor unit 6 through the exhaust port, the fifth opening 71, the eighth opening 74 and the fourth opening 62, the high-temperature and high-pressure refrigerant gas dissipates heat to the indoor unit 6 in the indoor unit 6 to enter air, the high-temperature and high-pressure refrigerant gas is condensed into medium-temperature and high-pressure liquid refrigerant, the medium-temperature and high-pressure liquid refrigerant is throttled into a gas/liquid mixed state in the indoor unit 6 and flows into the second chamber 41 through the ninth pipeline 109, part of the gas/liquid mixed state refrigerant in the second chamber 41 enters the compressor 1 through the fifth pipeline 105 and is heated and evaporated into gaseous refrigerant in the compressor 1, and then the gaseous refrigerant enters the gas-liquid separator 5 through the second inlet 52 and then enters the suction port through the first pipeline 101.
Part of the gas/liquid mixed refrigerant in the second chamber 41 enters the economizer 3 through the fourth pipeline 104 and flashes in the first chamber 31, and the flashed gas refrigerant enters the compressor 1 through the gas supplementing port 15 of the second pipeline 102 and supplements gas for the compressor 1, so that the starting power of the compressor 1 is reduced, and the energy efficiency of the multi-split central air-conditioning system of the embodiment of the application is improved. The flashed liquid refrigerant is discharged into the first passage through the sixth pipe 106, where the liquid refrigerant absorbs heat of the gaseous refrigerant in the loop of the outdoor unit 8 and is evaporated into the gaseous refrigerant, and then the gaseous refrigerant in the first passage is discharged through the first port 22 and enters the suction port.
When the height difference between the indoor unit and the outdoor unit is too large and the piping is too long in the prior art, the problems that oil return is difficult and lubricating oil in the compressor is insufficient and is abraded easily occur in the prior art due to an oil way system, and the system energy efficiency is low. However, the multi-split central air-conditioning system in the embodiment of the present application omits an oil-line system, thereby avoiding that the multi-split central air-conditioning system in the embodiment of the present application is easily subjected to oil return difficulty caused by too large height difference between the indoor unit and the outdoor unit and too long piping, and insufficient lubricating oil in the compressor 1 is worn, and also saving the cost for maintaining the oil-line system.
In some embodiments, the compressor 1 includes a first-stage compressor 11 and a second-stage compressor 12, the suction ports include a first suction port 13 provided on the first compressor 1 and a second suction port (not shown) provided on the second-stage compressor 12, the first suction port 13 communicates with the first liquid outlet 33, the discharge ports include a first discharge port (not shown) provided on the first compressor 1 and a second discharge port 14 provided on the second-stage compressor 12, the first suction port 13 communicates with the first discharge port, the second suction port communicates with the second discharge port 14, the second discharge port 14 is used for discharging refrigerant gas of high temperature and high pressure, and the first discharge port communicates with the second suction port.
Specifically, the compressor 1 has a radial bearing (not shown) and a thrust bearing (not shown) inside, which are dynamic pressure foil gas bearings, and the support of the shaft is provided by the gaseous refrigerant without the need for lubricating oil, whereby the multi-split central air conditioning system according to the embodiment of the present application can omit an oil passage system.
The compressor 1 further comprises a connecting pipeline (not shown) and a second electromagnetic valve (not shown), the connecting pipeline is connected with the first exhaust port and the second air suction port, the second electromagnetic valve is arranged in the connecting pipeline, the second electromagnetic valve is kept in a normally closed state when the compressor 1 operates, and the second electromagnetic valve is opened only before the compressor 1 stops, so that the phenomenon that when the compressor 1 stops, the gaseous refrigerant flows backwards to cause surging of the compressor 1 and further cause change of the axial force of the compressor 1 is avoided, and the compressor 1 is prevented from being damaged.
In some embodiments, the multi-split central air conditioning system further comprises a motor 9, and the motor 9 is used for driving the compressor 1.
Specifically, the motor 9 directly drives the compressor 1 to operate, so that mechanical loss is reduced, the shaft power of the compressor 1 is reduced, and the energy efficiency of the multi-split central air-conditioning system in the embodiment of the application is improved.
In some embodiments, the economizer 3 also has a liquid level gauge (not shown) disposed within the first chamber 31 for reflecting liquid refrigerant within the first chamber 31.
Specifically, the economizer 3 is a flash evaporation type economizer 3, a liquid level meter is arranged in the first chamber 31 to reflect whether liquid seal is formed in the liquid refrigerant in the first chamber 31, and whether the liquid refrigerant is discharged from the first liquid outlet 33 and the first gas outlet 34 can be judged through the liquid level meter.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the above embodiments have been shown and described, it should be understood that they are exemplary and not intended to limit the invention, and that various changes, modifications, substitutions and alterations can be made herein by those skilled in the art without departing from the scope of the invention.
Claims (10)
1. A multi-split central air conditioning system, comprising:
the compressor (1), the said compressor (1) is used for compressing and conveying the refrigerant vapour, the said compressor (1) has suction port, discharge port and make-up gas port (15), the said suction port is used for drawing the refrigerant gas of low-temperature low-pressure, the said discharge port is used for discharging the refrigerant gas of high-temperature high-pressure, the said make-up gas port (15) is used for supplementing the refrigerant gas to the said compressor (1);
-a heat exchanger (2), the heat exchanger (2) having a first and a second channel (21), the second channel (21) being adapted for connection to an outdoor unit (8) and being in loop communication with the outdoor unit (8);
the economizer (3) is used for flashing liquid refrigerant, the economizer (3) is provided with a first chamber (31), a first liquid inlet (32), a first liquid outlet (33) and a first gas outlet (34), the first liquid inlet (32), the first liquid outlet (33) and the first gas outlet (34) are communicated with the first chamber (31), the first gas outlet (34) is communicated with the gas supplementing opening (15), the first liquid outlet (33) is communicated with the gas suction opening, the liquid refrigerant flashes in the first chamber (31) to form gaseous refrigerant and liquid refrigerant, the gaseous refrigerant is discharged into the gas supplementing opening (15) through the first gas outlet (34), and the liquid refrigerant is discharged through the first liquid outlet (33);
the multi-split central air-conditioning system is provided with a refrigerating working condition and a heating working condition, the first channel is communicated with the exhaust port, the high-temperature and high-pressure refrigerant gas in the compressor (1) is introduced into the first channel through the exhaust port, the high-temperature and high-pressure refrigerant gas in the first channel exchanges heat with the refrigerant in the loop of the outdoor unit (8), and the first channel is communicated with the first liquid outlet (33) in the heating working condition.
2. A multi-split central air-conditioning system as claimed in claim 1, further comprising a liquid storage tank (4), said liquid storage tank (4) connecting said heat exchanger (2) and said economizer (3), said liquid storage tank (4) having a second chamber (41), a first opening (42) and a second opening (43), said first opening (42) and said second opening (43) being in communication with said second chamber (41), said compressor (1) further having a second liquid inlet (16) and a second air outlet (17);
in the refrigeration working condition, the first opening (42) is communicated with the first channel, and the second opening (43) is communicated with the second liquid inlet (16);
and under the heating working condition, the first opening (42) is communicated with the exhaust port, and the second opening (43) is communicated with the second liquid inlet (16).
3. The multi-split central air-conditioning system as claimed in claim 2, further comprising a gas-liquid separator (5), wherein the gas-liquid separator (5) has a first inlet (51), a second inlet (52) and a first outlet (53), the first inlet (51) is communicated with the first liquid outlet (33) in a cooling operation, the first outlet (53) is communicated with the suction port, the second inlet (52) is communicated with the second air outlet (17), the first inlet (51) is communicated with the first passage, the first outlet (53) is communicated with the suction port, and the second inlet (52) is communicated with the second air outlet (17) in a heating operation.
4. The multi-split central air-conditioning system as claimed in claim 3, further comprising an indoor unit (6), said indoor unit (6) having a third opening (61) and a fourth opening (62);
in the refrigeration working condition, the third opening (61) is communicated with the first liquid outlet (33), and the fourth opening (62) is communicated with the first inlet (51);
and under the heating working condition, the third opening (61) is communicated with the first opening (42), and the fourth opening (62) is communicated with the exhaust port.
5. The multi-split central air conditioning system as claimed in claim 4, further comprising a direction change valve (7), said direction change valve (7) having a fifth opening (71), a sixth opening (72), a seventh opening (73) and an eighth opening (74);
in the cooling condition, the fifth opening (71) is communicated with the exhaust port and the sixth opening (72), the sixth opening (72) is communicated with the first passage, the seventh opening (73) is communicated with the eighth opening (74) and the first inlet (51), and the eighth opening (74) is communicated with the fourth opening (62);
in the heating working condition, the fifth opening (71) is communicated with the exhaust port and the eighth opening (74), the eighth opening (74) is communicated with the fourth opening (62), the sixth opening (72) is communicated with the seventh opening (73) and the first passage, and the seventh opening (73) is communicated with the first inlet (51).
6. The multi-split central air conditioning system as claimed in claim 5, further comprising:
the first pipeline (101) is communicated with the air suction port and the first outlet (53), the first control valve (201) is arranged on the first pipeline (101), and the first control valve (201) is used for controlling the connection and disconnection of the first outlet (53) and the air suction port;
a second pipeline (102) and a second control valve (202), wherein the second pipeline (102) is communicated with the first air outlet (34) and the air supplementing port (15), the second control valve (202) is arranged on the second pipeline (102), and the second control valve (202) is used for controlling the on-off of the first air outlet (34) and the air supplementing port (15);
a third pipeline (103) and an electromagnetic valve (203), wherein the third pipeline (103) is communicated with the air suction port and the air exhaust port, the electromagnetic valve (203) is arranged on the third pipeline (103), and the electromagnetic valve (203) is used for preventing the gaseous refrigerant in the compressor (1) from flowing backwards when the compressor (1) is stopped;
a fourth pipeline (104) and a first throttling valve (204), wherein the fourth pipeline (104) is communicated with the second opening (43) and the first liquid inlet (32), the first throttling valve (204) is arranged on the fourth pipeline (104), and the first throttling valve (204) is used for throttling part of refrigerant in the liquid storage tank (4) into gas-liquid mixed state refrigerant;
a fifth pipeline (105) and a second throttling valve (205), wherein the fifth pipeline (105) is communicated with the second opening (43) and the second liquid inlet (16), and the fifth throttling valve is arranged on the fifth pipeline (105);
a sixth pipeline (106) and a third throttle valve (206), wherein the sixth pipeline (106) is communicated with the first liquid outlet (33) and the first channel, and the third throttle valve (206) is arranged on the sixth pipeline (106).
7. The multi-split central air conditioning system as claimed in claim 6, further comprising:
a seventh pipe line (107) and a first valve (207), the seventh pipe line (107) communicating the first passage and the first opening (42), the first valve (207) being provided on the seventh pipe line (107) for controlling the flow of the refrigerant in the first passage from the first passage into the second chamber (41);
-an eighth line (108) and a second valve (208), said eighth line (108) communicating said first outlet port (33) and said third opening (61), said second valve (208) being provided on said eighth line (108) for controlling the flow of said liquid refrigerant inside said first chamber (31) from said first chamber (31) to said indoor unit (6);
-a ninth pipe line (109) and-a third valve (209), said ninth pipe line (109) communicating said first opening (42) and said third opening (61), said third valve (209) being provided on said ninth pipe line (109) for controlling the flow of refrigerant inside said indoor unit (6) from said indoor unit (6) into said second chamber (41);
a fourth valve (210), the fourth valve (210) being disposed on the sixth line (106), and the fourth valve (210) being adjacent to the first passage for controlling the flow of the liquid refrigerant in the second chamber (41) from within the second chamber (41) into the first passage.
8. A multi-split central air conditioning system as claimed in any one of claims 1 to 7, wherein said compressor (1) comprises a primary compressor (11) and a secondary compressor (12), said suction ports comprise a first suction port (13) provided on said first compressor (1) and a second suction port provided on said secondary compressor (12), said first suction port (13) communicates with said first liquid outlet (33), said discharge ports comprise a first discharge port provided on said first compressor (1) and a second discharge port (14) provided on said secondary compressor (12), said first suction port (13) communicates with said first discharge port, said second suction port communicates with said second discharge port (14), said second discharge port (14) is for discharging refrigerant gas of high temperature and high pressure, and said first discharge port communicates with said second suction port.
9. A multi-split central air conditioning system as claimed in any one of claims 1 to 7, further comprising a motor (9), said motor (9) being for driving said compressor (1).
10. A multi-split central air conditioning system as claimed in any one of claims 1 to 7, wherein said economizer (3) further has a level gauge provided in said first chamber (31) for reflecting liquid refrigerant in said first chamber (31).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211461106.2A CN115717741A (en) | 2022-11-16 | 2022-11-16 | Multi-split central air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211461106.2A CN115717741A (en) | 2022-11-16 | 2022-11-16 | Multi-split central air conditioning system |
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| CN115717741A true CN115717741A (en) | 2023-02-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315742A (en) * | 2014-11-05 | 2015-01-28 | 合肥工业大学 | Electric automobile air conditioning heat pump system with economizer and control method thereof |
| CN109631381A (en) * | 2018-11-09 | 2019-04-16 | 青岛沃润达新能源科技有限公司 | A kind of vortex type air source heat pump system of the simultaneous refrigeration of heating |
| CN111457613A (en) * | 2020-05-19 | 2020-07-28 | 宝莲华新能源技术（上海）股份有限公司 | Double-cold-source air suspension centrifugal heat pump device |
| CN112629082A (en) * | 2021-01-08 | 2021-04-09 | 珠海格力电器股份有限公司 | Heating control system, multi-split air conditioning system and heating control method |
| CN113654132A (en) * | 2021-07-23 | 2021-11-16 | 青岛海尔空调电子有限公司 | Heat pump set |
-
2022
- 2022-11-16 CN CN202211461106.2A patent/CN115717741A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315742A (en) * | 2014-11-05 | 2015-01-28 | 合肥工业大学 | Electric automobile air conditioning heat pump system with economizer and control method thereof |
| CN109631381A (en) * | 2018-11-09 | 2019-04-16 | 青岛沃润达新能源科技有限公司 | A kind of vortex type air source heat pump system of the simultaneous refrigeration of heating |
| CN111457613A (en) * | 2020-05-19 | 2020-07-28 | 宝莲华新能源技术（上海）股份有限公司 | Double-cold-source air suspension centrifugal heat pump device |
| CN112629082A (en) * | 2021-01-08 | 2021-04-09 | 珠海格力电器股份有限公司 | Heating control system, multi-split air conditioning system and heating control method |
| CN113654132A (en) * | 2021-07-23 | 2021-11-16 | 青岛海尔空调电子有限公司 | Heat pump set |
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