CN111076444A - Air conditioning system and operation method thereof - Google Patents
Air conditioning system and operation method thereof Download PDFInfo
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- CN111076444A CN111076444A CN201811222939.7A CN201811222939A CN111076444A CN 111076444 A CN111076444 A CN 111076444A CN 201811222939 A CN201811222939 A CN 201811222939A CN 111076444 A CN111076444 A CN 111076444A
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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
- 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
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioning system and an operation method thereof, wherein the air conditioning system comprises a compressor with two compression cavities and two independently controlled circulation pipelines, the two compression cavities are respectively provided with an air suction port and an air exhaust port, and the two circulation pipelines can work in a refrigeration cycle simultaneously or one of the two circulation pipelines works in a heating cycle simultaneously or one of the two circulation pipelines works in the cooling cycle simultaneously, so that the air conditioning system at least has four operation modes of double-path refrigeration, single-path refrigeration, double-path heating and single-path heating. The outdoor heat exchanger and the indoor heat exchanger in the two circulation pipelines are equally divided into temperature areas, and can be independently adjusted and controlled according to different user requirements, so that the air-conditioning system can realize two different evaporation temperatures and two different condensation temperatures in a two-way refrigeration and two-way heating mode, and the overall energy efficiency of the air-conditioning system is effectively improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system capable of realizing double evaporation temperatures and double condensation temperatures and an operation method thereof.
Background
The existing air conditioning system generally has one evaporation temperature and one condensation temperature. For an air conditioning system with two terminals, the air conditioning and refrigeration system can only achieve one evaporating temperature and one condensing temperature if the control requirements of the indoor terminals are different. In order to meet the control requirements of the two tail ends, the evaporation temperature of the air conditioning system generally adopts the principle of 'just low', for example, the indoor requirements of refrigeration and dehumidification are simultaneously met, the evaporation temperature is often low, and the dehumidification is firstly met, so that the operation pressure ratio of a compressor in the air conditioning system is large, and the improvement on the overall energy efficiency of the air conditioning system is unfavorable.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The invention provides an air conditioning system and an operation method thereof, aiming at solving the defect that the air conditioning system in the prior art can only realize one evaporation temperature and one condensation temperature.
According to one aspect of the present invention, there is provided an air conditioning system including a compressor having two compression chambers each having a suction port and a discharge port, and two independently controlled circulation lines, the two circulation lines comprising: the first circulation pipeline comprises a first four-way reversing valve, a first interface of the first four-way reversing valve is communicated with an exhaust port of the first compression cavity, a second interface of the first four-way reversing valve is communicated with a first port of the first outdoor heat exchanger, a third interface of the first four-way reversing valve is communicated with a first port of the first indoor heat exchanger, a fourth interface of the first four-way reversing valve is communicated with an air suction port of the first compression cavity through a first liquid storage device, and a second port of the first outdoor heat exchanger is communicated with a second port of the first indoor heat exchanger through a first electronic expansion valve; the second circulation pipeline comprises a second four-way reversing valve, a first interface of the second four-way reversing valve is communicated with an exhaust port of the second compression cavity, a second interface is communicated with a first port of the second outdoor heat exchanger, a third interface is communicated with a first port of the second indoor heat exchanger, a fourth interface is communicated with an air suction port of the second compression cavity through a second liquid storage device, and a second port of the second outdoor heat exchanger is communicated with a second port of the second indoor heat exchanger through a second electronic expansion valve; when the air conditioning system operates in a first mode, the two four-way reversing valves simultaneously work in a first conduction mode, and the two electronic expansion valves simultaneously work in a partial diversion mode; when the air conditioning system operates in the second mode, the first four-way reversing valve works in the first conduction mode, the first electronic expansion valve works in the partial diversion mode, and the second electronic expansion valve is closed; when the air conditioning system operates in the third mode, the two four-way reversing valves simultaneously work in the second conduction mode, and the two electronic expansion valves simultaneously work in the partial diversion mode; when the air conditioning system operates in a fourth mode, the first four-way reversing valve works in a second conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is closed; the first conduction mode is that the first interface is communicated with the second interface, the third interface is communicated with the fourth interface, the second conduction mode is that the first interface is communicated with the third interface, the second interface is communicated with the fourth interface, the electronic expansion valve working in the partial diversion mode controls the flow of the refrigerant flowing through the indoor heat exchanger, and the closed electronic expansion valve prevents the refrigerant in the circulating pipeline from flowing.
Preferably, in the air conditioning system, the pulse for controlling the electronic expansion valve to work in the partial diversion mode is 0 to 500 PPS.
Preferably, in the air conditioning system, when the air conditioning system operates in the first mode, both the two circulation pipelines operate in a refrigeration cycle, both the two outdoor heat exchangers operate in a condensation mode, and both the two indoor heat exchangers operate in an evaporation mode.
Preferably, in the air conditioning system, the two outdoor heat exchangers operate at different condensing temperatures, and the two indoor heat exchangers operate at different evaporating temperatures.
Preferably, in the air conditioning system, when the air conditioning system operates in the second mode, the first circulation pipeline operates in a refrigeration cycle, the first outdoor heat exchanger operates in a condensation mode, and the first indoor heat exchanger operates in an evaporation mode; the second circulation line stops circulating.
Preferably, in the air conditioning system, when the air conditioning system operates in the third mode, both the two circulation pipelines operate in a heating cycle, both the two outdoor heat exchangers operate in an evaporation mode, and both the two indoor heat exchangers operate in a condensation mode.
Preferably, in the air conditioning system, the two outdoor heat exchangers operate at different evaporating temperatures, and the two indoor heat exchangers operate at different condensing temperatures.
Preferably, in the air conditioning system, when the air conditioning system operates in the fourth mode, the first circulation pipeline operates in a heating cycle, the first outdoor heat exchanger operates in an evaporation mode, and the first indoor heat exchanger operates in a condensation mode; the second circulation line stops circulating.
Preferably, in the air conditioning system described above, the first indoor heat exchanger and the first electronic expansion valve are located in a first indoor unit, and the second indoor heat exchanger and the second electronic expansion valve are located in a second indoor unit.
Preferably, in the air conditioning system, the two compression chambers of the compressor have the same or different cylinder volume ratios according to actual use requirements.
According to another aspect of the present invention, there is provided an operation method of an air conditioning system, which is applied to the air conditioning system, the operation method including: when the air conditioning system performs double-path refrigeration, the two four-way reversing valves are controlled to simultaneously work in a first conduction mode, and the two electronic expansion valves simultaneously work in a partial diversion mode; when the air conditioning system performs single-path refrigeration, the first four-way reversing valve is controlled to work in a first conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is controlled to be closed; when the air conditioning system heats in two ways, the two four-way reversing valves are controlled to work in a second conduction mode at the same time, and the two electronic expansion valves work in a partial diversion mode at the same time; and when the air conditioning system heats in a single way, the first four-way reversing valve is controlled to work in a second conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is controlled to be closed.
Preferably, in the above operation method, the four-way reversing valve is controlled to operate in the first conduction mode by communicating the first port with the second port and communicating the third port with the fourth port; the four-way reversing valve is controlled to work in a second conduction mode by communicating the first interface with the third interface and communicating the second interface with the fourth interface; controlling the electronic expansion valve to work in a partial diversion mode by outputting 0-500 PPS pulses; and controlling the electronic expansion valve to close by closing the pulse output.
Compared with the prior art, the invention has the beneficial effects that:
the air conditioning system of the invention adopts double cylinders, double suction and double exhaust compressors, realizes two circulation pipelines which are independently adjusted and controlled, and has at least four operation modes of double-path refrigeration, single-path refrigeration, double-path heating and single-path heating;
the outdoor heat exchanger and the indoor heat exchanger in the two circulation pipelines are respectively arranged in temperature areas, so that the air-conditioning system can realize two different evaporation temperatures and two different condensation temperatures in a two-way refrigeration mode and a two-way heating mode, and the overall energy efficiency of the air-conditioning system is effectively improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of the connection of an air conditioning system in an embodiment;
FIG. 2 is a schematic diagram of refrigerant flow when the air conditioning system is operating in a two-way cooling mode according to an embodiment;
FIG. 3 is a schematic diagram showing the four-way reversing valve in the refrigeration cycle of the embodiment;
FIG. 4 is a schematic diagram illustrating refrigerant flow when the air conditioning system is operating in a single-pass cooling mode according to an exemplary embodiment;
FIG. 5 is a schematic refrigerant flow diagram illustrating operation of the air conditioning system in a dual-pass heating mode according to an exemplary embodiment;
figure 6 is a schematic diagram of the four-way reversing valve in the heating cycle circuit of the embodiment;
fig. 7 is a schematic diagram of refrigerant flow when the air conditioning system is operating in the single-pass heating mode according to an embodiment.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
Referring to fig. 1, a connection diagram of an air conditioning system, the air conditioning system of this embodiment includes a compressor 1 having two compression chambers each having an air suction port and an air discharge port, and two independently controlled circulation lines including:
a first circulation pipeline, including a first four-way reversing valve 21, a first port of which is communicated with the exhaust port of the first compression chamber 11, a second port of which is communicated with the first port of the first outdoor heat exchanger 31, a third port of which is communicated with the first port of the first indoor heat exchanger 41, a fourth port of which is communicated with the suction port of the first compression chamber 11 through a first reservoir 51, and a second port of the first outdoor heat exchanger 31 is communicated with the second port of the first indoor heat exchanger 41 through a first electronic expansion valve 61;
and the second circulation pipeline comprises a second four-way reversing valve 22, wherein a first interface of the second four-way reversing valve is communicated with the exhaust port of the second compression cavity 12, a second interface of the second four-way reversing valve is communicated with a first port of the second outdoor heat exchanger 32, a third interface of the second four-way reversing valve is communicated with a first port of the second indoor heat exchanger 42, a fourth interface of the second four-way reversing valve is communicated with a suction port of the second compression cavity 12 through a second liquid storage device 52, and a second port of the second outdoor heat exchanger 32 is communicated with a second port of the second indoor heat exchanger 42 through a second.
The first circulation pipeline and the second circulation pipeline can be independently controlled and do not influence each other, so that the air conditioning system at least has four operation modes of double-path refrigeration (namely, the refrigeration cycle of the first circulation pipeline and the second circulation pipeline is equal), single-path refrigeration (one refrigeration cycle of the first circulation pipeline and the second circulation pipeline, and the other stop cycle), double-path heating (the heating cycle of the first circulation pipeline and the second circulation pipeline is equal), and single-path heating (one heating cycle of the first circulation pipeline and the second circulation pipeline, and the other stop cycle).
When the air conditioning system is operating in the first mode, i.e., the two-way cooling mode, the first four-way selector valve 21 and the second four-way selector valve 22 are simultaneously operating in the first conduction mode, and the first electronic expansion valve 61 and the second electronic expansion valve 62 are simultaneously operating in the partial diversion mode.
When the air conditioning system operates in a second mode, namely a single-path refrigeration mode, the first four-way reversing valve 21 works in a first conduction mode, the first electronic expansion valve 61 works in a partial diversion mode, and the second electronic expansion valve 62 is closed; or the second four-way reversing valve 22 works in the first conduction mode, the second electronic expansion valve 62 works in the partial diversion mode, and the first electronic expansion valve 61 is closed.
When the air conditioning system operates in the third mode, i.e., the two-way heating mode, the first four-way selector valve 21 and the second four-way selector valve 22 operate in the second conducting mode simultaneously, and the first electronic expansion valve 61 and the second electronic expansion valve 62 operate in the partial diversion mode simultaneously.
When the air conditioning system operates in a fourth mode, namely a single-way heating mode, the first four-way reversing valve 21 works in a second conduction mode, the first electronic expansion valve 61 works in a partial diversion mode, and the second electronic expansion valve 62 is closed; or the second four-way reversing valve 22 is in the second conduction mode, the second electronic expansion valve 62 is in the partial diversion mode, and the first electronic expansion valve 62 is closed.
The four-way reversing valve is characterized in that the first conduction mode is that the first interface is communicated with the second interface and the third interface is communicated with the fourth interface, and the second conduction mode is that the first interface is communicated with the third interface and the second interface is communicated with the fourth interface. The electronic expansion valve operating in the partial flow guiding mode controls the flow of the refrigerant flowing through the indoor heat exchanger, and the closed electronic expansion valve prevents the refrigerant in the circulating pipeline from circulating.
According to the working characteristics of the Electronic Expansion Valve (EEV), the pulse of the electronic expansion valve working in a partial diversion mode is controlled to be 0-500 PPS (pulse per second), and the closed pulse is controlled to be 0.
Further, a dotted line frame a represents an outdoor unit group, and a dotted line frame B represents an indoor unit group. The first indoor heat exchanger 41 and the first electronic expansion valve 61 are located in the first indoor unit, and the second indoor heat exchanger 42 and the second electronic expansion valve 62 are located in the second indoor unit. Or the first indoor heat exchanger 41, the first electronic expansion valve 61, the second indoor heat exchanger 42, and the second electronic expansion valve 62 are all located in the same indoor unit. By installing the electronic expansion valve on the indoor side, it is advantageous to accurately control the flow of the refrigerant flowing into the indoor heat exchanger.
In a preferred embodiment, the first indoor heat exchanger 41 and the second indoor heat exchanger 42 are separately disposed in two indoor units, so that when the two indoor units respectively operate at different evaporation temperatures or condensation temperatures, the two indoor units do not affect each other, and the temperatures of the respective operating areas can be respectively adjusted, thereby improving the overall energy efficiency of the air conditioning system.
Through the double-cylinder, double-suction and double-exhaust compressor 1, two same or different suction pressures and two same or different exhaust pressure controls are simultaneously realized in the air conditioning system. The volume of the first compression chamber 11 and the volume of the second compression chamber 12 of the compressor 1 may be set to the same or different cylinder volume ratios according to actual indoor and outdoor load conditions.
Four operation modes (two-way cooling, one-way cooling, two-way heating, and one-way heating) of the air conditioning system in the embodiment will be described below with reference to fig. 2 to 7. Fig. 2 to 7 respectively show the refrigerant flowing state and the conducting state of the four-way reversing valve of the air conditioning system in four operation modes, wherein solid arrows indicate the refrigerant flowing direction in the cooling mode, and dotted arrows indicate the refrigerant flowing direction in the heating mode.
Referring to fig. 2, when the air conditioning system operates in the two-way cooling mode, both circulation lines operate in the cooling cycle, both outdoor heat exchangers operate in the condensing mode, and both indoor heat exchangers operate in the evaporating mode. At this time, the first four-way selector valve 21 and the second four-way selector valve 22 operate in the first conduction mode simultaneously, and the first electronic expansion valve 61 and the second electronic expansion valve 62 operate in the partial diversion mode simultaneously.
Taking the first four-way selector valve 21 as an example, as shown in fig. 3, the first port 211 communicates with the second port 212, and the third port 213 communicates with the fourth port 214. In the first circulation line, suction, compression, and discharge through the first compression chamber 11 of the compressor 1 constitute an independent refrigeration cycle. Specifically, the first compression chamber 11 sucks the refrigerant from the first accumulator 51, compresses the refrigerant, and discharges the compressed refrigerant; the refrigerant flows into the first outdoor heat exchanger 31 through the first connection port 211 and the second connection port 212 of the first four-way selector valve 21; the first outdoor heat exchanger 31 enters a condensation mode, performs heat conversion on the refrigerant to form a low-temperature refrigerant, and discharges the low-temperature refrigerant; the low-temperature refrigerant is guided by the first electronic expansion valve 61 and flows into the first indoor heat exchanger 41; the first indoor heat exchanger 41 enters an evaporation mode, reduces the ambient temperature using a low-temperature refrigerant, and discharges a high-temperature refrigerant; the high-temperature refrigerant returns to the first receiver 51 communicating with the suction port of the first compression chamber 11 through the third port 213 and the fourth port 214 of the first four-way selector valve 21, thereby completing one refrigeration cycle.
Similarly, in the second circulation line, the suction, compression, and discharge of the gas passing through the second compression chamber 11 of the compressor 1 constitute an independent refrigeration cycle. Specifically, the second compression chamber 12 sucks the refrigerant from the second accumulator 52, compresses the refrigerant, and discharges the compressed refrigerant; the refrigerant flows into the second outdoor heat exchanger 32 through the first and second ports of the second four-way reversing valve 22; the second outdoor heat exchanger 32 enters a condensation mode, and forms a low-temperature refrigerant after performing heat conversion on the refrigerant and discharges the low-temperature refrigerant; the low-temperature refrigerant flows into the second indoor heat exchanger 42 after being guided by the second electronic expansion valve 62; the second indoor heat exchanger 42 enters an evaporation mode, reduces the ambient temperature using the low-temperature refrigerant, and discharges the high-temperature refrigerant; the high-temperature refrigerant flows back to the second reservoir 52 communicated with the suction port of the second compression chamber 12 through the third port and the fourth port of the second four-way reversing valve 22, and a refrigeration cycle is completed.
The compressor 1 with double cylinders, double suction and double exhaust is adopted, so that the independent adjustment of two different suction pressures and two different exhaust pressures can be realized, and two same or different evaporation temperatures and two same or different condensation temperatures can be realized by two circulation pipelines during the simultaneous refrigeration circulation. For example, the indoor unit B is designed to have a temperature range, so that the evaporation temperature of the first indoor heat exchanger 41 is 18 °, the evaporation temperature of the second indoor heat exchanger 42 is 8 °, two different evaporation temperatures in the two-way refrigeration mode are realized, and different temperature control requirements of the ends of the two indoor units, namely the first indoor heat exchanger 41 and the second indoor heat exchanger 42, are met. Similarly, the outdoor unit A is designed with temperature division areas, and two different condensation temperatures in a two-way refrigeration mode are realized.
When the air conditioning system operates in the single-path refrigeration mode, one of the two circulation pipelines operates in the refrigeration cycle, the other circulation is stopped, the air conditioning system is in a partial load state, and the air conditioning system realizes single evaporation temperature and single condensation temperature.
Referring to the single-circuit cooling mode shown in fig. 4, the first circulation line operates in a cooling cycle, and the first compression chamber 11 sucks the refrigerant from the first accumulator 51, compresses the refrigerant, and discharges the compressed refrigerant; the refrigerant flows into the first outdoor heat exchanger 31 through the first connection port 211 and the second connection port 212 of the first four-way selector valve 21; the first outdoor heat exchanger 31 enters a condensation mode, performs heat conversion on the refrigerant to form a low-temperature refrigerant, and discharges the low-temperature refrigerant; the low-temperature refrigerant is guided by the first electronic expansion valve 61 and flows into the first indoor heat exchanger 41; the first indoor heat exchanger 41 enters an evaporation mode, reduces the ambient temperature using a low-temperature refrigerant, and discharges a high-temperature refrigerant; the high-temperature refrigerant flows back to the first receiver 51 communicating with the suction port of the first compression chamber 11 through the third port 213 and the fourth port 214 of the first four-way selector valve 21, thereby completing the refrigeration cycle.
And the second electronic expansion valve 61 is closed to prevent the refrigerant from flowing, so that the second circulation line stops circulating, and neither the second indoor heat exchanger 42 nor the second outdoor heat exchanger 32 is involved in operation.
When the two four-way reversing valves of the air conditioning system are switched to the second conduction mode simultaneously, the two-way heating operation can be met; when the two paths of heating operation are carried out, the two indoor heat exchangers can meet two same or different condensing temperature control requirements, and the two outdoor heat exchangers can also be set to be the same or different evaporating temperatures.
Referring to fig. 5, when the air conditioning system operates in the dual heating mode, both circulation pipes operate in the heating cycle, both outdoor heat exchangers operate in the evaporation mode, and both indoor heat exchangers operate in the condensation mode. At this time, the first four-way selector valve 21 and the second four-way selector valve 22 operate in the second conduction mode simultaneously, and the first electronic expansion valve 61 and the second electronic expansion valve 62 operate in the partial diversion mode simultaneously.
Taking the first four-way selector valve 21 as an example, as shown in fig. 6, the first port 211 communicates with the third port 213, and the fourth port 214 communicates with the second port 212. In the first circulation line, the suction, compression, and discharge of the gas passing through the first compression chamber 11 of the compressor 1 constitute an independent heating cycle. Specifically, the first compression chamber 11 sucks the refrigerant from the first accumulator 51, compresses the refrigerant, and discharges the compressed refrigerant; the refrigerant flows into the first indoor heat exchanger 41 through the first connection port 211 and the third connection port 213 of the first four-way selector valve 21; the first indoor heat exchanger 41 enters a condensing mode, and discharges the low-temperature refrigerant after heat conversion while raising the ambient temperature by using the refrigerant; the low-temperature refrigerant is guided by the first electronic expansion valve 61 and flows into the first outdoor heat exchanger 31; the first outdoor heat exchanger 31 enters an evaporation mode, and converts low-temperature refrigeration heat into high-temperature refrigerant to be discharged; the high-temperature refrigerant flows back to the first receiver 51 communicating with the suction port of the first compression chamber 11 through the second port 212 and the fourth port 214 of the first four-way selector valve 21, and completes one heating cycle.
Similarly, in the second circulation line, the suction, compression, and discharge of the gas passing through the second compression chamber 12 of the compressor 1 constitute an independent heating cycle. Specifically, the second compression chamber 12 sucks the refrigerant from the second accumulator 52, compresses the refrigerant, and discharges the compressed refrigerant; the refrigerant flows into the second indoor heat exchanger 42 through the first and third ports of the second four-way selector valve 22; the second indoor heat exchanger 42 enters a condensing mode, and discharges the low-temperature refrigerant after heat conversion while raising the ambient temperature by using the refrigerant; the low-temperature refrigerant is guided by the second electronic expansion valve 62 and flows into the second outdoor heat exchanger 32; the second outdoor heat exchanger 32 enters an evaporation mode, and low-temperature refrigeration heat is converted into high-temperature refrigerant to be discharged; the high-temperature refrigerant flows back to the second accumulator 52 communicated with the suction port of the second compression chamber 12 through the second port and the fourth port of the second four-way reversing valve 22, and a heating cycle is completed.
The compressor 1 with double cylinders, double suction and double exhaust is adopted, so that the independent adjustment of two different suction pressures and two different exhaust pressures can be realized, and two same or different evaporation temperatures and two same or different condensation temperatures can be realized by two circulation pipelines during simultaneous heating circulation. Specifically, the indoor unit B is designed to have different temperature zones, so that the first indoor heat exchanger 41 and the second indoor heat exchanger 42 have different condensation temperatures, and different temperature control requirements of the two indoor unit ends are met. Similarly, the outdoor unit A is designed with temperature-division areas to realize two different evaporation temperatures.
When the air conditioning system operates in a single-path heating mode, one of the two circulation pipelines operates in a heating circulation, the other circulation is stopped, the air conditioning system is in a partial load state, and the air conditioning system realizes single evaporation temperature and single condensation temperature.
Referring to the single heating mode shown in fig. 7, the first circulation line operates in a heating cycle, and the first compression chamber 11 sucks the refrigerant from the first accumulator 51, compresses the refrigerant, and discharges the compressed refrigerant; the refrigerant flows into the first indoor heat exchanger 41 through the first connection port 211 and the third connection port 213 of the first four-way selector valve 21; the first indoor heat exchanger 41 enters a condensing mode, and discharges the low-temperature refrigerant after heat conversion while raising the ambient temperature by using the refrigerant; the low-temperature refrigerant is guided by the first electronic expansion valve 61 and flows into the first outdoor heat exchanger 31; the first outdoor heat exchanger 31 enters an evaporation mode, and converts low-temperature refrigeration heat into high-temperature refrigerant to be discharged; the high-temperature refrigerant flows back to the first receiver 51 communicating with the suction port of the first compression chamber 11 through the second port 212 and the fourth port 214 of the first four-way selector valve 21, and the heating cycle is completed.
And the second electronic expansion valve 62 is closed to prevent the refrigerant from circulating, so that the second circulation line is stopped from circulating, and neither the second indoor heat exchanger 42 nor the second outdoor heat exchanger 32 is involved in the operation.
The embodiment of the invention also provides an operation method of the air conditioning system, which is used for operating the air conditioning system described in any embodiment.
When the air conditioning system performs double-path refrigeration, the two four-way reversing valves are controlled to simultaneously work in a first conduction mode, and the two electronic expansion valves simultaneously work in a partial diversion mode.
When the air conditioning system performs single-path refrigeration, the first four-way reversing valve is controlled to work in a first conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is closed; or the second four-way reversing valve is controlled to work in a first conduction mode, the second electronic expansion valve works in a partial diversion mode, and the first electronic expansion valve is closed.
When the air conditioning system heats in two ways, the two four-way reversing valves are controlled to work in the second conduction mode simultaneously, and the two electronic expansion valves work in the partial diversion mode simultaneously.
When the air conditioning system heats in a single way, the first four-way reversing valve is controlled to work in a second conduction mode, the second electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is closed; or the second four-way reversing valve is controlled to work in a second conduction mode, the second electronic expansion valve works in a partial diversion mode, and the first electronic expansion valve is closed.
The four-way reversing valve is controlled to work in a first conduction mode by communicating the first interface with the second interface and communicating the third interface with the fourth interface; the four-way reversing valve is controlled to work in a second conduction mode by communicating the first interface with the third interface and communicating the second interface with the fourth interface; controlling the electronic expansion valve to work in a partial diversion mode by outputting 0-500 PPS pulses; and controlling the electronic expansion valve to close by closing the pulse output.
The relevant parameters for controlling the air conditioning system to operate in different modes are summarized in the following table:
in the two-way refrigeration running mode, the air conditioning system is in a full-load state, the two four-way reversing valves are in a first conduction mode, the two electronic expansion valves are in a partial diversion mode, the two outdoor heat exchangers are in a condensation mode, and the two indoor heat exchangers are in an evaporation mode. Through different temperature regulation control, can realize the different evaporating temperature of two indoor heat exchangers, the different condensing temperature of two outdoor heat exchangers.
In the one-way refrigeration running mode, the air conditioning system is in a partial load state, and the original conduction mode of the four-way reversing valve is the first conduction mode, so that the two four-way reversing valves are both in the first conduction mode, one of the two electronic expansion valves is in a partial diversion mode, and the other electronic expansion valve is closed. The outdoor heat exchanger is in a condensing mode and the indoor heat exchanger is in an evaporating mode in a circulating pipeline where the electronic expansion valve in the partial diversion mode is located. And the outdoor heat exchanger and the indoor heat exchanger in the other circulating pipeline do not participate in operation.
In the two-way heating operation mode, the air conditioning system is in a full-load state, the two four-way reversing valves are switched from an original first conduction mode to a second conduction mode, the two electronic expansion valves are in a partial diversion mode, the two outdoor heat exchangers are in an evaporation mode, and the two indoor heat exchangers are in a condensation mode. Through different temperature regulation control, can realize the different condensation temperature of two indoor heat exchangers, the different evaporating temperature of two outdoor heat exchangers.
In the single-path heating operation mode, the air conditioning system is in a partial load state, one of the two four-way reversing valves still keeps the original first conduction mode, and the other one is switched to the second conduction mode. And a circulation pipeline where the four-way reversing valve switched to the second conduction mode is located is in a heating circulation mode, an electronic expansion valve in the circulation pipeline is in a partial diversion mode, the outdoor heat exchanger is in an evaporation mode, and the indoor heat exchanger is in a condensation mode. The electronic expansion valve, the outdoor heat exchanger and the indoor heat exchanger in the other circulation pipeline do not participate in operation.
The control of different evaporation temperatures and different condensation temperatures is realized simultaneously through a double-cylinder, double-suction and double-exhaust compressor. In an air conditioning system, two independent refrigeration cycles can be implemented, the two independent refrigeration cycles having two identical or different evaporating temperatures and two identical or different condensing temperatures. Two independent heating cycles are realized by switching the two four-way reversing valves. The two independent refrigeration cycles/heating cycles can be independently adjusted according to different requirements of users, and the overall energy efficiency of the operation of the air conditioning system is effectively improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (12)
1. An air conditioning system comprising a compressor having two compression chambers each having an inlet and an outlet and two independently controlled circulation lines, the two circulation lines comprising:
the first circulation pipeline comprises a first four-way reversing valve, a first interface of the first four-way reversing valve is communicated with an exhaust port of the first compression cavity, a second interface of the first four-way reversing valve is communicated with a first port of the first outdoor heat exchanger, a third interface of the first four-way reversing valve is communicated with a first port of the first indoor heat exchanger, a fourth interface of the first four-way reversing valve is communicated with an air suction port of the first compression cavity through a first liquid storage device, and a second port of the first outdoor heat exchanger is communicated with a second port of the first indoor heat exchanger through a first electronic expansion valve;
the second circulation pipeline comprises a second four-way reversing valve, a first interface of the second four-way reversing valve is communicated with an exhaust port of the second compression cavity, a second interface is communicated with a first port of the second outdoor heat exchanger, a third interface is communicated with a first port of the second indoor heat exchanger, a fourth interface is communicated with an air suction port of the second compression cavity through a second liquid storage device, and a second port of the second outdoor heat exchanger is communicated with a second port of the second indoor heat exchanger through a second electronic expansion valve;
when the air conditioning system operates in a first mode, the two four-way reversing valves simultaneously work in a first conduction mode, and the two electronic expansion valves simultaneously work in a partial diversion mode;
when the air conditioning system operates in the second mode, the first four-way reversing valve works in the first conduction mode, the first electronic expansion valve works in the partial diversion mode, and the second electronic expansion valve is closed;
when the air conditioning system operates in the third mode, the two four-way reversing valves simultaneously work in the second conduction mode, and the two electronic expansion valves simultaneously work in the partial diversion mode;
when the air conditioning system operates in a fourth mode, the first four-way reversing valve works in a second conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is closed;
the first conduction mode is that the first interface is communicated with the second interface, the third interface is communicated with the fourth interface, the second conduction mode is that the first interface is communicated with the third interface, the second interface is communicated with the fourth interface, the electronic expansion valve working in the partial diversion mode controls the flow of the refrigerant flowing through the indoor heat exchanger, and the closed electronic expansion valve prevents the refrigerant in the circulating pipeline from flowing.
2. The air conditioning system as claimed in claim 1, wherein the pulse for controlling the electronic expansion valve to operate in the partial flow guiding mode is 0 to 500 PPS.
3. The air conditioning system as claimed in claim 1, wherein when the air conditioning system is operating in the first mode, both of the circulation lines are operating in a refrigeration cycle, both of the outdoor heat exchangers are operating in a condensing mode, and both of the indoor heat exchangers are operating in an evaporating mode.
4. An air conditioning system as claimed in claim 3, wherein the two outdoor heat exchangers operate at different condensing temperatures and the two indoor heat exchangers operate at different evaporating temperatures.
5. The air conditioning system as recited in claim 1 wherein when the air conditioning system is operating in said second mode, the first circulation line is operating in a refrigeration cycle, the first outdoor heat exchanger is operating in a condensing mode, and the first indoor heat exchanger is operating in an evaporating mode; the second circulation line stops circulating.
6. The air conditioning system of claim 1, wherein when the air conditioning system is operating in the third mode, both of the circulation lines are operating in a heating cycle, both of the outdoor heat exchangers are operating in an evaporation mode, and both of the indoor heat exchangers are operating in a condensing mode.
7. The air conditioning system as claimed in claim 6, wherein the two outdoor heat exchangers operate at different evaporating temperatures and the two indoor heat exchangers operate at different condensing temperatures.
8. The air conditioning system as claimed in claim 1, wherein when the air conditioning system is operated in the fourth mode, the first circulation line is operated in a heating cycle, the first outdoor heat exchanger is operated in an evaporation mode, and the first indoor heat exchanger is operated in a condensation mode; the second circulation line stops circulating.
9. The air conditioning system of claim 1, wherein said first indoor heat exchanger and said first electronic expansion valve are located within a first indoor machine and said second indoor heat exchanger and said second electronic expansion valve are located within a second indoor machine.
10. The air conditioning system as claimed in claim 1, wherein the two compression chambers of the compressor have the same cylinder volume ratio, or the two compression chambers of the compressor have different cylinder volume ratios.
11. An operation method of an air conditioning system applied to the air conditioning system according to any one of claims 1 to 10, characterized in that:
when the air conditioning system performs double-path refrigeration, the two four-way reversing valves are controlled to simultaneously work in a first conduction mode, and the two electronic expansion valves simultaneously work in a partial diversion mode;
when the air conditioning system performs single-path refrigeration, the first four-way reversing valve is controlled to work in a first conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is controlled to be closed;
when the air conditioning system heats in two ways, the two four-way reversing valves are controlled to work in a second conduction mode at the same time, and the two electronic expansion valves work in a partial diversion mode at the same time;
and when the air conditioning system heats in a single way, the first four-way reversing valve is controlled to work in a second conduction mode, the first electronic expansion valve works in a partial diversion mode, and the second electronic expansion valve is controlled to be closed.
12. The method of operation of claim 11, wherein:
the four-way reversing valve is controlled to work in a first conduction mode by communicating the first interface with the second interface and communicating the third interface with the fourth interface; the four-way reversing valve is controlled to work in a second conduction mode by communicating the first interface with the third interface and communicating the second interface with the fourth interface; and
controlling the electronic expansion valve to work in a partial diversion mode by outputting 0-500 PPS pulses; and controlling the electronic expansion valve to close by closing the pulse output.
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| CN201811222939.7A CN111076444A (en) | 2018-10-19 | 2018-10-19 | Air conditioning system and operation method thereof |
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| CN201811222939.7A CN111076444A (en) | 2018-10-19 | 2018-10-19 | Air conditioning system and operation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623888A (en) * | 2020-05-06 | 2021-11-09 | 上海海立电器有限公司 | Air conditioning system and control method thereof |
| CN113834144A (en) * | 2020-06-24 | 2021-12-24 | 上海海立电器有限公司 | Air conditioning system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002054831A (en) * | 2000-08-08 | 2002-02-20 | Sanyo Electric Co Ltd | Air-conditioning device |
| CN2516413Y (en) * | 2001-12-25 | 2002-10-16 | 石家庄车辆厂 | Unit-type double-system refrigeration machine set |
| CN102967104A (en) * | 2011-08-31 | 2013-03-13 | 三星电子株式会社 | Refrigerator and method for controlling the same |
| CN103528309A (en) * | 2012-07-06 | 2014-01-22 | 三星电子株式会社 | Refrigerator |
| CN105115181A (en) * | 2015-07-21 | 2015-12-02 | 上海日立电器有限公司 | Air conditioning system |
| CN205919550U (en) * | 2016-08-18 | 2017-02-01 | 合肥美菱股份有限公司 | Modularization multicycle refrigerating system and modularization forced air cooling refrigerator |
| CN206141268U (en) * | 2016-10-25 | 2017-05-03 | 珠海格力电器股份有限公司 | Heat pump air conditioning unit and electric motor coach |
| CN106642306A (en) * | 2015-10-28 | 2017-05-10 | 上海日立电器有限公司 | Air conditioning system |
-
2018
- 2018-10-19 CN CN201811222939.7A patent/CN111076444A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002054831A (en) * | 2000-08-08 | 2002-02-20 | Sanyo Electric Co Ltd | Air-conditioning device |
| CN2516413Y (en) * | 2001-12-25 | 2002-10-16 | 石家庄车辆厂 | Unit-type double-system refrigeration machine set |
| CN102967104A (en) * | 2011-08-31 | 2013-03-13 | 三星电子株式会社 | Refrigerator and method for controlling the same |
| CN103528309A (en) * | 2012-07-06 | 2014-01-22 | 三星电子株式会社 | Refrigerator |
| CN105115181A (en) * | 2015-07-21 | 2015-12-02 | 上海日立电器有限公司 | Air conditioning system |
| CN106642306A (en) * | 2015-10-28 | 2017-05-10 | 上海日立电器有限公司 | Air conditioning system |
| CN205919550U (en) * | 2016-08-18 | 2017-02-01 | 合肥美菱股份有限公司 | Modularization multicycle refrigerating system and modularization forced air cooling refrigerator |
| CN206141268U (en) * | 2016-10-25 | 2017-05-03 | 珠海格力电器股份有限公司 | Heat pump air conditioning unit and electric motor coach |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623888A (en) * | 2020-05-06 | 2021-11-09 | 上海海立电器有限公司 | Air conditioning system and control method thereof |
| CN113623888B (en) * | 2020-05-06 | 2023-01-06 | 上海海立电器有限公司 | Air conditioning system and control method thereof |
| CN113834144A (en) * | 2020-06-24 | 2021-12-24 | 上海海立电器有限公司 | Air conditioning system |
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