CN116045404B - Single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply - Google Patents
Single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply Download PDFInfo
- Publication number
- CN116045404B CN116045404B CN202310148514.0A CN202310148514A CN116045404B CN 116045404 B CN116045404 B CN 116045404B CN 202310148514 A CN202310148514 A CN 202310148514A CN 116045404 B CN116045404 B CN 116045404B
- Authority
- CN
- China
- Prior art keywords
- valve
- interface
- way
- port
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 92
- 238000004378 air conditioning Methods 0.000 title claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims description 55
- 230000005611 electricity Effects 0.000 claims description 45
- 238000005057 refrigeration Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 238000010248 power generation Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 39
- 238000010586 diagram Methods 0.000 description 22
- 238000005286 illumination Methods 0.000 description 13
- 239000000203 mixture Substances 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 12
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 238000005338 heat storage Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
-
- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention belongs to the technical field of solar heat pumps, and provides a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply. The single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply can operate a heating mode of PVT heat sources, the heating mode of air sources supplies heat for rooms, and the refrigerating cycle can operate in summer to refrigerate the rooms; and a fin defrosting mode for continuously supplying heat to the room is operated during winter heat supply. The single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is strong in working condition-variable operation suitability, small in room temperature fluctuation during defrosting, high in comfort, higher in equipment utilization rate and higher in photovoltaic cell power generation efficiency.
Description
Technical Field
The invention relates to the technical field of solar heat pumps, in particular to a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply.
Background
PVT components which take low-temperature refrigerant as cooling medium are connected in parallel in a conventional air source heat pump system, and the PVT-air source heat pump system can be formed, is a novel heat supply mode for the renewable energy distributed type multi-energy complementary application of solar energy, air heat energy and the like, can overcome the defect that solar energy is influenced by weather conditions, is beneficial to improving the stability of the system, and has important significance for energy conservation and emission reduction of buildings. The fin heat exchanger of the existing PVT-air source heat pump system has low defrosting efficiency and low heat exchanger equipment utilization rate. The PVT-air source heat pump system operates in a PVT heat supply mode in the daytime with illumination, and the heat dissipation of the photovoltaic cell under the illumination can greatly improve the temperature of the evaporator, so that the evaporator can be effectively prevented from frosting compared with the conventional air source heat pump system. In overcast and rainy days with weak illumination or at night with low temperature, the PVT-air source is the same as a conventional air source heat pump system, and frost still can be formed after the evaporator is switched to the fin heat exchanger, so that reverse circulation defrosting and energy storage defrosting are mostly adopted in the prior art. Reverse circulation defrosting is carried out, on one hand, the flow direction of the refrigerant is switched, the high and low pressures of the system are reversed, severe impact is brought to the system, on the other hand, heat is absorbed from a heating room, the room temperature is reduced, the comfort in the room is directly affected, the indoor heat exchanger is used as an evaporator, the surface temperature is as low as-20 to-25 ℃, and hot air cannot be blown out for a long time after the system recovers heat supply. The heat storage defrosting needs to be additionally provided with a heat storage heat exchanger in the system, and the conventional heat storage heat exchanger is limited by the problems of heat storage materials, structures and the like and cannot be widely popularized.
Disclosure of Invention
The invention aims at overcoming the technical defects in the prior art, and provides a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply, which can realize that a fin heat exchanger does not take heat from the indoor during defrosting in heating seasons and can also supply heat continuously for the indoor.
The technical scheme adopted for achieving the purpose of the invention is as follows: a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply comprises a first compressor 1-1, a second compressor 1-2, an outdoor fin heat exchanger, a PVT assembly 3, a throttle valve, an indoor heat exchanger 5, a one-way valve, a stop valve, a four-way reversing valve, a three-way valve and an inverter 10;
The PVT assembly 3 is connected to an inverter 10; one end of the PVT component 3 is connected with an inlet of the second one-way valve 6-2 and an inlet of the third one-way valve 6-3 through the first one-way valve 6-1 respectively; the outlet of the second one-way valve 6-2, the third interface of the fourth three-way valve 9-4 and the third interface of the third three-way valve 9-3 are converged and then connected with the first interface of the first four-way reversing valve 8-1, and one end of the third stop valve 7-3 is connected to a pipeline between the convergence point and the first interface of the first four-way reversing valve 8-1; the outlet of the third one-way valve 6-3 is respectively connected with a third interface of the first four-way reversing valve 8-1 and one end of the second stop valve 7-2; the second interface of the first four-way reversing valve 8-1 is connected with the air suction port of the first compressor 1-1, and the fourth interface of the first four-way reversing valve 8-1 is connected with the air discharge port of the first compressor 1-1; the other end of the second stop valve 7-2 is respectively connected with a third interface of the second four-way reversing valve 8-2 and the indoor heat exchanger 5; the first interface of the second four-way reversing valve 8-2 is respectively connected with the other end of the third stop valve 7-3, the first interface of the third three-way valve 9-3 and the first interface of the fourth three-way valve 9-4; the second interface of the third three-way valve 9-3 and the second interface of the fourth three-way valve 9-4 are respectively connected with the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2; the second interface of the second four-way reversing valve 8-2 is connected with the air suction port of the second compressor 1-2, and the fourth interface of the second four-way reversing valve 8-2 is connected with the air discharge port of the second compressor 1-2; the indoor heat exchanger 5 is connected with one end of the first stop valve 7-1, the first interface of the first three-way valve 9-1 and the third interface of the second three-way valve 9-2 after passing through the fourth throttle valve 4-4; the second interface of the first three-way valve 9-1 is connected with the first outdoor fin heat exchanger 2-1 through a second throttle valve 4-2; the second port of the second three-way valve 9-2 is connected with the second outdoor fin heat exchanger 2-2 through a third throttle valve 4-3; the first stop valve 7-1 is respectively connected with the other end of the PVT component 3, the third interface of the first three-way valve 9-1 and the first interface of the second three-way valve 9-2 through the first throttle valve 4-1.
The mode of the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is divided into: the first outdoor fin heat exchanger is defrosted when uninterrupted heat supply and defrosting, the second outdoor fin heat exchanger is defrosted for a room continuous heat supply mode, the second outdoor fin heat exchanger is defrosted when uninterrupted heat supply and defrosting, the first outdoor fin heat exchanger is defrosted for a room continuous heat supply mode, the first outdoor fin heat exchanger is defrosted when intermittent heat supply and the second outdoor fin heat exchanger are simultaneously defrosted, PVT heat supply mode, air source heat supply mode and air source refrigeration mode.
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternating defrosting and uninterrupted heat supply is the uninterrupted heat supply defrosting mode, the first outdoor fin heat exchanger is defrosted, and the second outdoor fin heat exchanger is the room continuous heat supply mode, the first stop valve 7-1, the second stop valve 7-2 and the third stop valve 7-3 are closed; the first interface of the first four-way reversing valve 8-1 is communicated with the fourth interface of the first four-way reversing valve 8-1, and the second interface of the first four-way reversing valve 8-1 is communicated with the third interface of the first four-way reversing valve 8-1; the first interface of the second four-way reversing valve 8-2 is communicated with the second interface of the second four-way reversing valve 8-2, and the third interface of the second four-way reversing valve 8-2 is communicated with the fourth interface of the second four-way reversing valve 8-2; the first compressor 1-1 and the second compressor 1-2 are started; the second port of the first three-way valve 9-1 is communicated with the third port of the first three-way valve 9-1, the second port of the second three-way valve 9-2 is communicated with the third port of the second three-way valve 9-2, the second port of the third three-way valve 9-3 is communicated with the third port of the third three-way valve 9-3, and the first port of the fourth three-way valve 9-4 is communicated with the second port of the fourth three-way valve 9-4; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternating defrosting and uninterrupted heating is the uninterrupted heating defrosting mode, the second outdoor fin heat exchanger is defrosted, and the first outdoor fin heat exchanger is the room continuous heating mode; closing the first stop valve 7-1, the second stop valve 7-2 and the third stop valve 7-3; the first interface of the first four-way reversing valve 8-1 is communicated with the fourth interface of the first four-way reversing valve 8-1, and the second interface of the first four-way reversing valve 8-1 is communicated with the third interface of the first four-way reversing valve 8-1; the first interface of the second four-way reversing valve 8-2 is communicated with the second interface of the second four-way reversing valve 8-2, and the third interface of the second four-way reversing valve 8-2 is communicated with the fourth interface of the second four-way reversing valve 8-2; the first compressor 1-1 and the second compressor 1-2 are started; the first port of the first three-way valve 9-1 is communicated with the second port of the first three-way valve 9-1, the first port of the second three-way valve 9-2 is communicated with the second port of the second three-way valve 9-2, the first port of the third three-way valve 9-3 is communicated with the second port of the third three-way valve 9-3, and the second port of the fourth three-way valve 9-4 is communicated with the third port of the fourth three-way valve 9-4; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting and uninterrupted heat supply is a mode of defrosting the first outdoor fin heat exchanger and simultaneously defrosting the second outdoor fin heat exchanger of intermittent heat supply, the indoor heat exchanger stops heat supply, the first stop valve 7-1 is closed, and the second stop valve 7-2 and the third stop valve 7-3 are opened; the first interface of the first four-way reversing valve 8-1 is communicated with the fourth interface of the first four-way reversing valve 8-1, and the second interface of the first four-way reversing valve 8-1 is communicated with the third interface of the first four-way reversing valve 8-1; the first interface of the second four-way reversing valve 8-2 is communicated with the fourth interface of the second four-way reversing valve 8-2, and the second interface of the second four-way reversing valve 8-2 is communicated with the third interface of the second four-way reversing valve 8-2; the first compressor 1-1 and the second compressor 1-2 are started; the second port of the first three-way valve 9-1 is communicated with the third port of the first three-way valve 9-1, the first port of the second three-way valve 9-2 is communicated with the second port of the second three-way valve 9-2, the first port of the third three-way valve 9-3 is communicated with the second port of the third three-way valve 9-3, and the second port of the fourth three-way valve 9-4 is communicated with the third port of the fourth three-way valve 9-4; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting uninterrupted heat supply is PVT heat supply mode, a first stop valve 7-1, a second stop valve 7-2 and a third stop valve 7-3 are opened, a second port of the first three-way valve 9-1 is communicated with a third port of the first three-way valve 9-1, a first port of the second three-way valve 9-2 is communicated with a second port of the second three-way valve 9-2, a first port of the third three-way valve 9-3 is communicated with a second port of the third three-way valve 9-3, and a first port of the fourth three-way valve 9-4 is communicated with a second port of the fourth three-way valve 9-4; the first interface of the first four-way reversing valve 8-1 is communicated with the second interface of the first four-way reversing valve 8-1, and the third interface of the first four-way reversing valve 8-1 is communicated with the fourth interface of the first four-way reversing valve 8-1; the first interface of the second four-way reversing valve 8-2 is communicated with the second interface of the second four-way reversing valve 8-2, and the third interface of the second four-way reversing valve 8-2 is communicated with the fourth interface of the second four-way reversing valve 8-2; the first compressor 1-1 and the second compressor 1-2 are started; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting uninterrupted heat supply is an air source heat supply mode, the first stop valve 7-1 is closed, and the second stop valve 7-2 and the third stop valve 7-3 are opened; the first port of the first three-way valve 9-1 is communicated with the second port of the first three-way valve 9-1, the second port of the second three-way valve 9-2 is communicated with the third port of the second three-way valve 9-2, the first port of the third three-way valve 9-3 is communicated with the second port of the third three-way valve 9-3, and the second port of the fourth three-way valve 9-4 is communicated with the third port of the fourth three-way valve 9-4; the first interface of the first four-way reversing valve 8-1 is communicated with the second interface of the first four-way reversing valve 8-1, and the third interface of the first four-way reversing valve 8-1 is communicated with the fourth interface of the first four-way reversing valve 8-1; the first interface of the second four-way reversing valve 8-2 is communicated with the second interface of the second four-way reversing valve 8-2, and the third interface of the second four-way reversing valve 8-2 is communicated with the fourth interface of the second four-way reversing valve 8-2; the first compressor 1-1 and the second compressor 1-2 are started; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting uninterrupted heat supply is an air source refrigeration mode, the first stop valve 7-1 is closed, and the second stop valve 7-2 and the third stop valve 7-3 are opened; the first port of the first three-way valve 9-1 is communicated with the second port of the first three-way valve 9-1, the second port of the second three-way valve 9-2 is communicated with the third port of the second three-way valve 9-2, the first port of the third three-way valve 9-3 is communicated with the second port of the third three-way valve 9-3, and the second port of the fourth three-way valve 9-4 is communicated with the third port of the fourth three-way valve 9-4; the first interface of the first four-way reversing valve 8-1 is communicated with the fourth interface of the first four-way reversing valve 8-1, and the second interface of the first four-way reversing valve 8-1 is communicated with the third interface of the first four-way reversing valve 8-1; the first interface of the second four-way reversing valve 8-2 is communicated with the fourth interface of the second four-way reversing valve 8-2, and the second interface of the second four-way reversing valve 8-2 is communicated with the third interface of the second four-way reversing valve 8-2; the opening degree modulation of the second throttle valve 4-2 and the third throttle valve 4-3 is maximum; the first compressor 1-1 and the second compressor 1-2 are started; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
The three-way valve is replaced by a plurality of stop valve combinations or a four-way reversing valve; the stop valve is an electromagnetic valve, a hand valve or a ball valve.
The cascade compression PVT heat pump multi-split system for uninterrupted heat supply and defrosting realizes five modes of PVT heat supply, air source heat supply, uninterrupted heat supply and defrosting, intermittent heat supply and defrosting and air source refrigeration according to the environmental temperature, illumination intensity and heat supply and defrosting requirements. In the daytime of low illumination in winter or in the nighttime of no illumination, after the heat pump is operated for a period of time in an air source heat supply mode, the fin heat exchanger needs to defrost, and when the single-stage parallel PVT heat pump system for uninterrupted heat supply and defrosting is operated in an uninterrupted heat supply and defrosting mode, namely, the first outdoor fin heat exchanger and the second outdoor fin heat exchanger defrost in sequence.
The defrosting operation schematic diagram of the first outdoor fin heat exchanger of the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is shown in figure 2. At the moment, the first outdoor fin heat exchanger is defrosted, and the second outdoor fin heat exchanger absorbs heat to maintain the indoor heat exchanger to supply heat.
The defrosting operation schematic diagram of the second outdoor fin heat exchanger of the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is shown in figure 3. At the moment, the second outdoor fin heat exchanger is defrosted, and the first outdoor fin heat exchanger absorbs heat to maintain the indoor heat exchanger to supply heat.
The single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is in an intermittent heat supply defrosting mode, and an operation principle diagram of simultaneous defrosting of the first outdoor fin heat exchanger and the second outdoor fin heat exchanger is shown in fig. 4. At this time, the indoor heat exchanger stops supplying heat.
In the daytime with illumination in winter, the single-machine parallel PVT heat pump multi-split system for uninterrupted heat supply and defrosting operates in a PVT heat supply mode, and an operation principle diagram is shown in figure 5.
In the daytime or nighttime with low ambient temperature and weak illumination in winter, the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply operates in an air source heat supply mode, and an operation principle diagram is shown in figure 6.
In hot summer, the single-stage parallel PVT-air source multi-on-line heat pump air conditioning system with alternate defrosting and uninterrupted heat supply operates in an air source refrigeration mode, and an operation principle diagram is shown in figure 7.
Compared with the prior art, the invention has the beneficial effects that:
1. the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply can be operated in PVT heat supply mode and air source heat supply mode in winter and in air source refrigeration mode in summer. The PVT heat pump system has flexible switching among various heating modes, strong annual environmental adaptability and higher heating and refrigerating efficiency;
2. The single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is provided with two outdoor fin heat exchangers, and can realize two defrosting modes when defrosting demands exist after long-term operation by air source heat supply circulation. First kind: the PVT assembly is used as a heat-taking heat source to run the refrigerant reverse circulation to defrost one of the outdoor heat exchangers, and the other outdoor heat exchanger is used as a heat-taking heat source to run the heating circulation to realize uninterrupted heat supply for a room; second kind: and the PVT assembly is used as a heat-taking heat source to operate the refrigerant reverse circulation to defrost the two outdoor heat exchangers simultaneously. In the two defrosting modes, heat is not required to be taken from a room, heat is taken from idle PVT components which are positioned outdoors and at the same environmental temperature, and the utilization rate of system equipment is higher by utilizing the PVT components which do not work; the first defrosting mode can also realize defrosting of the outdoor heat exchanger and simultaneously continuously supply heat to a room, so that the fluctuation of the room temperature is small, and the temperature comfort is higher; in addition, the pressure change of the system before and after defrosting is slower, the impact force on the system is smaller, and the system stability is better.
Drawings
FIG. 1 is a schematic diagram of a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply according to the invention;
in the figure: 1-1, a first compressor; 1-2, a second compressor; 2-1, a first outdoor fin heat exchanger; 2-2, a second outdoor fin heat exchanger; 3. a PVT component; 4-1, a first throttle valve; 4-2, a second throttle valve; 4-3, a third throttle valve; 4-4, a fourth throttle valve; 5. an indoor heat exchanger; 6-1, a first one-way valve; 6-2, a second one-way valve; 6-3, a third one-way valve; 7-1, a first stop valve; 7-2, a second stop valve; 7-3, a third stop valve; 8-1, a first four-way reversing valve; 8-2, a second four-way reversing valve; 9-1, a first three-way valve; 9-2, a second three-way valve; 9-3, a third three-way valve; 9-4, a fourth three-way valve; 10. an inverter.
Fig. 2 is a schematic diagram showing that a first outdoor fin heat exchanger is defrosted and a second outdoor fin heat exchanger is used for continuously supplying heat to a room when the single-stage parallel PVT-air source multi-split air source heat pump air conditioning system for continuously supplying heat and defrosting alternately provided by the invention;
FIG. 3 is a schematic diagram showing the principle of continuous heat supply of a room by a first outdoor fin heat exchanger and a second outdoor fin heat exchanger when the single-stage parallel PVT-air source multi-split heat pump air conditioning system for continuous heat supply and defrosting of alternate defrosting of the invention;
FIG. 4 is a schematic diagram showing the simultaneous defrosting operation of a first outdoor fin heat exchanger and a second outdoor fin heat exchanger for intermittent heat supply of a single-stage parallel PVT-air source multi-split heat pump air conditioning system for intermittent heat supply of alternate defrosting in the invention;
FIG. 5 is a schematic diagram of the alternate defrosting uninterruptible heat supply single-stage parallel PVT-air source multi-split heat pump air conditioning system of the invention operating in PVT heat supply mode;
FIG. 6 is a schematic diagram of the alternate defrosting uninterruptible heat supply single-stage parallel PVT-air source multi-split heat pump air conditioning system of the invention operating in an air source heat supply mode;
FIG. 7 is a schematic diagram of the alternate defrosting uninterruptible heat supply single-stage parallel PVT-air source multi-split heat pump air conditioning system of the invention operating in an air source refrigeration mode;
FIG. 8 is a schematic diagram of a four-way reversing valve interface in a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply;
in the figure: 8a, a first interface of the four-way reversing valve; 8b, a second interface of the four-way reversing valve; 8c, a third interface of the four-way reversing valve; 8d, a fourth interface of the four-way reversing valve.
FIG. 9 is a schematic diagram of a three-way valve interface in a single-stage parallel PVT heat pump multi-split system without intermittent defrosting according to the present invention;
in the figure: 9a, a first port of the three-way valve; 9b, a second port of the three-way valve; 9c, a third port of the three-way valve.
Detailed Description
In the description of the present invention, it should be noted that, unless explicitly specified and defined otherwise, the terms "high pressure", "medium pressure" and "low pressure" are to be understood in a broad sense as referring to the relative values of the pressures in the same refrigerant circuit, for example, "high pressure" in PVT heating mode refers to the refrigerant pressure values between the compressor discharge to the fourth throttle, and "medium pressure" refers to the refrigerant pressure values between the fourth throttle to the first throttle, and "low pressure" refers to the refrigerant pressure values between the first throttle to the compressor suction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The schematic diagram of the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply is shown in fig. 1, and the system comprises a first compressor 1-1, a second compressor 1-2, a first outdoor fin heat exchanger 2-1, a first outdoor fin heat exchanger 2-2, a PVT component 3, a first throttle valve 4-1, a second throttle valve 4-2, a third throttle valve 4-3, a fourth throttle valve 4-4, an indoor heat exchanger 5, a first check valve 6-1, a second check valve 6-2, a third check valve 6-3, a first stop valve 7-1, a second stop valve 7-2, a third stop valve 7-3, a first four-way reversing valve 8-1, a second four-way reversing valve 8-2, a first three-way valve 9-1, a second three-way valve 9-2, a third three-way valve 9-3, a fourth three-way valve 9-4 and an inverter 10. The exhaust port of the first compressor 1-1 is connected with the fourth interface of the first four-way reversing valve 8-1, the air suction port of the first compressor 1-1 is connected with the second interface of the first four-way reversing valve 8-1, the first interface of the first four-way reversing valve 8-1 is connected with the inlet of the third stop valve 7-3, the outlet of the second one-way valve 6-2, the third interface of the third three-way valve 9-3 and the third interface of the fourth three-way valve 9-4, the third interface of the first four-way reversing valve 8-1 is connected with the outlet of the third one-way valve 6-3 and one end of the second stop valve 7-2, the exhaust port of the second compressor 1-2 is connected with the fourth interface of the second four-way reversing valve 8-2, the air suction port is connected with the second four-way reversing valve 8-2, the third interface of the second four-way reversing valve 8-2 is connected with the other end of the second stop valve 7-2 and one end of the indoor heat exchanger 5, and the third interface of the third four-way reversing valve 8-2 is connected with the third interface of the third three-way valve 7-3 and the third interface of the third three-way valve 9-4; the other end of the indoor heat exchanger 5 is connected with one end of the first stop valve 7-1 through a fourth throttle valve 4-4, a first interface of the first three-way valve 9-1 and a third interface of the second three-way valve 9-2, a second interface of the first three-way valve 9-1 is connected with the first outdoor fin heat exchanger 2-1 through a second throttle valve 4-2, a second interface of the second three-way valve 9-2 is connected with the first outdoor fin heat exchanger 2-2 through a third throttle valve 4-3, and the first stop valve 7-1 is connected with one end of the PVT assembly 3 through the first throttle valve 4-1, a third interface of the first three-way valve 9-1 and a first interface of the second three-way valve 9-2; the other end of the first outdoor fin heat exchanger 2-1 is connected with a second interface of the third three-way valve 9-3, the other end of the first outdoor fin heat exchanger 2-2 is connected with a second interface of the fourth three-way valve 9-4, the other end of the PVT component 3 is connected with an inlet of the second one-way valve 6-2 and an inlet of the third one-way valve 6-3 through a first one-way valve 6-1, and the PVT component 3 is connected with the inverter 10.
The cascade compression PVT heat pump multi-split system for uninterrupted heat supply and defrosting realizes PVT heat supply, air source heat supply, uninterrupted heat supply and defrosting, intermittent heat supply and air source refrigeration to run in six modes according to the environmental temperature, illumination intensity and heat supply and defrosting requirements.
In the daytime of low illumination in winter or in the nighttime of no illumination, after the heat pump is operated for a period of time in an air source heat supply mode, the fin heat exchanger needs to defrost, and when the single-stage parallel PVT heat pump system for uninterrupted heat supply and defrosting is operated in an uninterrupted heat supply and defrosting mode, namely, the first outdoor fin heat exchanger 2-1 and the first outdoor fin heat exchanger 2-2 defrost in sequence.
The invention discloses a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply, and a defrosting operation schematic diagram of a first outdoor fin heat exchanger 2-1 of the single-stage parallel PVT-air source multi-split heat pump air conditioning system is shown in figure 2. At this time, the first outdoor fin heat exchanger 2-1 is defrosted, and the first outdoor fin heat exchanger 2-2 absorbs heat to maintain the indoor heat exchanger 5 to supply heat. Closing the first stop valve 7-1, the second stop valve 7-2 and the third stop valve 7-3, wherein a first interface of the first four-way reversing valve 8-1 is communicated with a fourth interface, a second interface of the first four-way reversing valve 8-1 is communicated with a third interface, a first interface of the second four-way reversing valve 8-2 is communicated with the second interface, a third interface of the second four-way reversing valve 8-2 is communicated with the fourth interface, the first compressor 1-1 is started, the second compressor 1-2 is started, the second interface of the first three-way valve 9-1 is communicated with the third interface, a second interface of the second three-way valve 9-2 is communicated with the third interface, a second interface of the third three-way valve 9-3 is communicated with the third interface, and a first interface of the fourth three-way valve 9-4 is communicated with the second interface; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
Refrigerant thermodynamic process: the air suction port of the first compressor 1-1 is used for sucking low-pressure low-temperature refrigerant gas through the first four-way reversing valve 8-1, the third one-way valve 6-3 and the first one-way valve 6-1 from the PVT component 3, the low-pressure low-temperature refrigerant gas is changed into high-pressure overheat gas through compression boosting and then enters the first outdoor fin heat exchanger 2-1 through the first port of the first four-way reversing valve 8-1 and the third three-way valve 9-3, the high-pressure overheat gas is heated and finned into high-pressure liquid in the first outdoor fin heat exchanger 2-1, meanwhile, the frost layer on the surface of the fins is heated and melted, the high-pressure liquid flowing out of the first outdoor fin heat exchanger 2-1 is expanded and decompressed into low-pressure liquid mixed refrigerant through the second throttle valve 4-2 and then enters the PVT component 3 through the first three-way valve 9-1, the low-pressure liquid mixed refrigerant is changed into low-pressure low-temperature refrigerant gas after absorbing heat in the PVT component 3 and outdoor air in the PVT component 3, and the low-pressure low-temperature refrigerant gas is sucked into the first one-way valve 6-3 and the four-way valve 1, and the first one-way valve 2-way heat exchanger 2-1 is sucked into the first outdoor heat exchanger through the first one-way valve 1. While the first outdoor fin heat exchanger 2-1 is defrosted, the first outdoor fin heat exchanger 2-2 needs to absorb heat to continue to supply heat to a room, the air suction port of the second compressor 1-2 is used for sucking low-pressure low-temperature refrigerant gas through the second four-way reversing valve 8-2 and the fourth three-way valve 9-4, the low-pressure low-temperature refrigerant gas is sucked into the first outdoor fin heat exchanger 2-2 and is changed into high-pressure high-temperature superheated gas through compression boosting and then enters the indoor heat exchanger 5, the high-pressure high-temperature superheated gas heats indoor air in the indoor heat exchanger 5, meanwhile, the high-pressure liquid is condensed into high-pressure liquid and enters the fourth throttle valve 4-4 for expansion depressurization, the medium-pressure gas-liquid mixture is used for entering the third throttle valve 4-3 through the second three-way valve 9-2, the low-pressure gas-liquid mixture is used for being changed into low-pressure gas mixture after the expansion depressurization again, the low-pressure gas-liquid mixture is used for being used for changing into low-pressure low-temperature refrigerant gas after the evaporation and absorption of heat in the outdoor air in the first outdoor fin heat exchanger 2-2, and the low-pressure gas is sucked into the second three-way valve 9-4 to complete the second three-way valve 1-2 for heat circulation.
The invention discloses a single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply, and a defrosting operation schematic diagram of a first outdoor fin heat exchanger 2-2 of the single-stage parallel PVT-air source multi-split heat pump air conditioning system is shown in figure 3. At this time, the first outdoor fin heat exchanger 2-2 is defrosted, and the first outdoor fin heat exchanger 2-1 absorbs heat to maintain the indoor heat exchanger 5 to supply heat. Closing the first stop valve 7-1, the second stop valve 7-2 and the third stop valve 7-3, wherein a first interface of the first four-way reversing valve 8-1 is communicated with a fourth interface, a second interface of the first four-way reversing valve 8-1 is communicated with a third interface, a first interface of the second four-way reversing valve 8-2 is communicated with the second interface, a third interface of the second four-way reversing valve 8-2 is communicated with the fourth interface, the first compressor 1-1 is started and the second compressor 1-2 is started, a first interface of the first three-way valve 9-1 is communicated with the second interface, a first interface of the second three-way valve 9-2 is communicated with the second interface, a first interface of the third three-way valve 9-3 is communicated with the second interface, and a second interface of the fourth three-way valve 9-4 is communicated with the third interface; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
Refrigerant thermodynamic process: the air suction port of the first compressor 1-1 is sucked into low-pressure low-temperature refrigerant gas from the PVT component 3 through the first four-way reversing valve 8-1, the third one-way valve 6-3 and the first one-way valve 6-1, the low-pressure superheated gas is converted into high-pressure superheated gas through compression boosting and enters the first outdoor fin heat exchanger 2-2 through the first four-way reversing valve 8-1 and the fourth three-way valve 9-4, the high-pressure superheated gas heats fins in the first outdoor fin heat exchanger 2-2 to become high-pressure liquid, meanwhile, the frost layers on the surfaces of the fins are heated and melted, the high-pressure liquid flowing out from the first outdoor fin heat exchanger 2-2 is converted into low-pressure gas mixed refrigerant through expansion reducing of the third throttling valve 4-3, the low-pressure gas mixed refrigerant enters the PVT component 3 through the second three-way valve 9-2, the low-pressure gas mixed refrigerant absorbs heat in the PVT component 3 and outdoor air in the PVT component 3, and the low-pressure low-temperature refrigerant gas is converted into low-pressure liquid through the first one-way valve 6-1, the third one-way valve 6-3 and the first four-way valve 1-1 is sucked into the first outdoor fin heat exchanger 1-1. While the first outdoor fin heat exchanger 2-2 is defrosted, the first outdoor fin heat exchanger 2-1 needs to absorb heat to continue to supply heat to a room, the air suction port of the second compressor 1-2 is used for sucking low-pressure low-temperature refrigerant gas through the second four-way reversing valve 8-2 and the third three-way valve 9-3, the low-pressure low-temperature refrigerant gas is sucked into the first outdoor fin heat exchanger 2-1 and is changed into high-pressure high-temperature superheated gas through compression boosting and then enters the indoor heat exchanger 5, the high-pressure high-temperature superheated gas heats indoor air in the indoor heat exchanger 5, meanwhile, the high-pressure liquid is condensed into high-pressure liquid and enters the fourth throttling valve 4-4 for expansion and depressurization, the medium-pressure gas-liquid mixture is changed into the second throttling valve 4-2 through the first three-way valve 9-1, the low-pressure gas-liquid mixture is changed into low-pressure gas-liquid mixture into the first outdoor fin heat exchanger 2-1 after the low-pressure gas-liquid mixture is subjected to expansion depressurization again, and then the low-pressure gas-temperature refrigerant gas is changed into low-pressure low-temperature refrigerant gas after the evaporation and absorption of heat in the outdoor air in the first outdoor fin heat exchanger 2-1, and the third three-way valve 9-3 is sucked into the second three-way valve 2-2 to complete circulation.
The single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply adopts a principle diagram of defrosting operation of the first outdoor fin heat exchanger 2-1 and the first outdoor fin heat exchanger 2-2 in an intermittent heat supply defrosting mode at the same time as shown in figure 4. At this time, the indoor heat exchanger 5 stops supplying heat. Closing the first stop valve 7-1, opening the second stop valve 7-2 and the third stop valve 7-3, wherein a first interface of the first four-way reversing valve 8-1 is communicated with a fourth interface, a second interface of the first four-way reversing valve 8-1 is communicated with a third interface, a first interface of the second four-way reversing valve 8-2 is communicated with the fourth interface, a second interface of the second four-way reversing valve 8-2 is communicated with the third interface, the first compressor 1-1 is started and the second compressor 1-2 is started, a second interface of the first three-way valve 9-1 is communicated with the third interface, a first interface of the second three-way valve 9-2 is communicated with the second interface, a first interface of the third three-way valve 9-3 is communicated with the second interface, and a second interface of the fourth three-way valve 9-4 is communicated with the third interface; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
Refrigerant thermodynamic process: the air suction port of the first compressor 1-1 and the air suction port of the second compressor 1-2 are respectively sucked into low-pressure low-temperature refrigerant gas by the PVT component 3 through a first four-way reversing valve 8-1, a second four-way reversing valve 8-2, a second stop valve 7-2 and a third one-way valve 6-3, compressed and boosted by the first compressor 1-1 and the second compressor 1-2 to be changed into high-pressure high-temperature overheat gas, the high-pressure high-temperature overheat gas enters the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2 through the first four-way reversing valve 8-1 and the second four-way reversing valve 8-2, the high-pressure high-temperature overheat gas is heated in the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2 to be changed into high-pressure liquid, meanwhile, the frost layers on the surfaces of the fins are heated and melted, high-pressure liquid flowing out of the two outdoor fin heat exchangers is expanded and depressurized through the second throttling valve 4-2 and the third throttling valve 4-3 respectively to become low-pressure gas-liquid mixed refrigerant, the low-pressure gas-liquid mixed refrigerant enters the PVT assembly 3 through the first three-way valve 9-1 and the second three-way valve 9-2 respectively, the low-pressure gas-liquid mixed refrigerant absorbs heat in the PVT assembly 3 and outdoor air in the PVT assembly 3 and becomes low-pressure low-temperature refrigerant gas, and the low-pressure low-temperature refrigerant gas is subjected to expansion and depressurization through the first one-way valve 6-1, the third one-way valve 6-3, the second stop valve 7-2, the first four-way reversing valve 8-1 and the second four-way reversing valve 8-2 are sucked by the first compressor 1-1 and the second compressor 1-2 to complete the simultaneous defrosting cycle of the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2.
In the daytime with illumination in winter, the single-machine parallel PVT heat pump multi-split system for uninterrupted heat supply and defrosting operates in a PVT heat supply mode, and an operation principle diagram is shown in figure 5. Opening the first stop valve 7-1, the second stop valve 7-2 and the third stop valve 7-3, wherein a second interface of the first three-way valve 9-1 is communicated with a third interface, a first interface of the second three-way valve 9-2 is communicated with the second interface, a first interface of the third three-way valve 9-3 is communicated with the second interface, a first interface of the fourth three-way valve 9-4 is communicated with the second interface, a first interface of the first four-way reversing valve 8-1 is communicated with the second interface, a third interface is communicated with the fourth interface, a first interface of the second four-way reversing valve 8-2 is communicated with the second interface, a third interface is communicated with the fourth interface, and the first compressor 1-1 and the second compressor 1-2 are started; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
Refrigerant thermodynamic process: the air suction port of the first compressor 1-1 and the air suction port of the second compressor 1-2 are used for sucking low-pressure low-temperature refrigerant gas through the second one-way valve 6-2 and the first one-way valve 6-1 from the PVT component 3, compressing and boosting the low-pressure low-temperature refrigerant gas through the first compressor 1-1 and the second compressor 1-2 to be changed into high-pressure high-temperature overheated gas, and then the high-pressure high-temperature overheated gas enters the indoor heat exchanger 5, the indoor air is heated in the indoor heat exchanger 5 to generate a heating phenomenon, meanwhile, the high-pressure overheated gas is condensed into high-pressure liquid to enter the fourth throttle valve 4-4 for expansion and depressurization, the medium-pressure gas-liquid mixture is changed into the first throttle valve 4-1 through the first stop valve 7-1, the low-pressure gas-liquid mixture refrigerant is changed into the low-pressure gas mixture after the re-expansion depressurization, the low-pressure gas-liquid mixture refrigerant absorbs the photovoltaic cell thermal capacity in the PVT component 3 to be changed into high-pressure gas through the first one-way valve 6-1 and the second one-way valve 6-2, and the first compressor 1-1 and the second compressor 1-2 are used for sucking the high-pressure gas again for heating circulation.
In the daytime or nighttime with low ambient temperature and weak illumination in winter, the single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply operates in an air source heat supply mode, and an operation principle diagram is shown in figure 6. Closing the first stop valve 7-1, opening the second stop valve 7-2 and the third stop valve 7-3, wherein a first interface and a second interface of the first three-way valve 9-1 are communicated, a second interface and a third interface of the second three-way valve 9-2 are communicated, a first interface and a second interface of the third three-way valve 9-3 are communicated, a second interface and a third interface of the fourth three-way valve 9-4 are communicated, a first interface and a second interface of the first four-way reversing valve 8-1 are communicated, a third interface and a fourth interface are communicated, a first interface and a second interface of the second four-way reversing valve 8-2 are communicated, a third interface and a fourth interface are communicated, and the first compressor 1-1 and the second compressor 1-2 are started; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
Refrigerant thermodynamic process: the air suction port of the first compressor 1-1 and the air suction port of the second compressor 1-2 respectively suck low-pressure low-temperature refrigerant gas through a first four-way reversing valve 8-1, a second four-way reversing valve 8-2, a third three-way valve 9-3 and a fourth three-way valve 9-4 by the first outdoor fin heat exchanger 2-1 and the first outdoor fin heat exchanger 2-2, the high-pressure high-temperature overheated gas is compressed and boosted by the first compressor 1-1 and the second compressor 1-2 to become high-pressure high-temperature overheated gas to enter the indoor heat exchanger 5, the high-pressure high-temperature overheated gas heats indoor air in the indoor heat exchanger 5 to generate a heating phenomenon, and simultaneously is condensed into high-pressure liquid to enter the fourth throttle valve 4-4 for expansion and depressurization, the mixed gas-liquid enters the second throttle valve 4-2 and the third throttle valve 4-3 through the first three-way valve 9-1 and the second three-way valve 9-2 respectively, the mixed gas-liquid enters the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2 respectively after being expanded and depressurized through the second throttle valve 4-2 and the third throttle valve 4-3, the mixed gas-liquid refrigerant is converted into low-pressure gas-liquid refrigerant, the low-pressure gas-liquid refrigerant is evaporated and absorbed in the outdoor air in the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2, and the low-pressure gas-liquid mixed refrigerant is converted into low-pressure gas-liquid refrigerant and is subjected to a first compressor 1-1 through the third three-way valve 9-3, the fourth three-way valve 9-4, the first four-way reversing valve 8-1 and the second four-way reversing valve 8-2 respectively, the second compressor 1-2 sucks to complete the heating cycle.
In hot summer, the single-stage parallel PVT-air source multi-on-line heat pump air conditioning system with alternate defrosting and uninterrupted heat supply operates in an air source refrigeration mode, and an operation principle diagram is shown in figure 7. The first stop valve 7-1 is closed, the second stop valve 7-2 is opened with the third stop valve 7-3, the first interface of the first three-way valve 9-1 is communicated with the second interface, the second interface of the second three-way valve 9-2 is communicated with the third interface, the first interface of the third three-way valve 9-3 is communicated with the second interface, the second interface of the fourth three-way valve 9-4 is communicated with the third interface, the first interface of the first four-way reversing valve 8-1 is communicated with the fourth interface, the second interface is communicated with the third interface, the first interface of the second four-way reversing valve 8-2 is communicated with the fourth interface, the second interface is communicated with the third interface, the opening degree of the second throttle valve 4-2 and the third throttle valve 4-3 are modulated to the maximum, and the first compressor 1-1 and the second compressor 1-2 are started; the photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, which is regulated by the inverter 10 to be electricity used by the user.
Refrigerant thermodynamic process: the air suction port of the first compressor 1-1 and the air suction port of the second compressor 1-2 respectively suck low-pressure low-temperature refrigerant gas from the indoor heat exchanger 5 through a first four-way reversing valve 8-1 and a second four-way reversing valve 8-2, the low-pressure low-temperature refrigerant gas is compressed and boosted by the first compressor 1-1 and the second compressor 1-2 to become high-pressure high-temperature superheated gas, the high-pressure high-temperature superheated gas enters the first outdoor fin heat exchanger 2-1 and the second outdoor fin heat exchanger 2-2 through the first four-way reversing valve 8-1 and the second four-way reversing valve 8-2, the high-pressure high-temperature superheated gas is cooled by air in the two fin heat exchangers to become high-pressure liquid, the high-pressure liquid flowing out of the first outdoor fin heat exchanger 2-1 and the first outdoor fin heat exchanger 2-2 respectively enters the fourth throttle valve 4-4 through the first three-way valve 9-1 and the second three-way valve 9-2, and is converted into low-pressure gas-liquid mixed refrigerant after expansion and depressurization, and then enters the indoor heat exchanger 5, the low-pressure gas-liquid mixed refrigerant absorbs heat in indoor air in the indoor heat exchanger 5 and becomes low-pressure gas, refrigeration is generated in the indoor, and the low-pressure low-temperature refrigerant gas is sucked again by the first compressor 1-1 and the second compressor 1-2 through the first four-way reversing valve 8-1 and the second four-way reversing valve 8-2 respectively, so that the refrigeration cycle of the indoor heat exchanger 5 is completed. The photovoltaic cells in the PVT assembly 3 generate electricity under sunlight, and the electricity is changed into electricity which can be used by a user through the adjustment of the inverter 10.
The first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve and the fifth three-way valve can be a plurality of stop valve combinations or four-way reversing valves.
The PVT component can be flat box type, tube plate type, inflation plate type or flat plate type.
The compressor is any one of a scroll compressor, a rotor compressor, a screw compressor and a piston compressor.
The low-temperature expansion valve, the high-temperature expansion valve and the precooling expansion valve are electronic expansion valves, thermal expansion valves, capillary tubes or orifice plate throttling devices.
As shown in fig. 8, the four-way selector valve has the following joint positions, i.e., the four-way selector valve first joint 8a, the four-way selector valve second joint 8b, the four-way selector valve third joint 8c, and the four-way selector valve fourth joint 8d.
As shown in fig. 9, the three-way valve ports are positioned as follows, namely, a three-way valve first port 9a, a three-way valve second port 9b, and a three-way valve third port 9c, respectively. When the three-way valve second port 9b is communicated with the three-way valve first port 9a, the three-way valve third port 9c is not communicated with the three-way valve first port 9a and the three-way valve second port 9b, and when the three-way valve second port 9b is communicated with the three-way valve third port 9c, the three-way valve first port 9a is not communicated with the three-way valve second port 9b and the three-way valve third port 9c.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (1)
1. The single-stage parallel PVT-air source multi-split heat pump air conditioning system with the alternate defrosting and uninterrupted heat supply is characterized by comprising a first compressor (1-1), a second compressor (1-2), an outdoor fin heat exchanger, a PVT assembly (3), a throttle valve, an indoor heat exchanger (5), a one-way valve, a stop valve, a four-way reversing valve, a three-way valve and an inverter (10);
The PVT assembly (3) is connected with the inverter (10); one end of the PVT component (3) is connected with an inlet of the second one-way valve (6-2) and an inlet of the third one-way valve (6-3) through the first one-way valve (6-1) respectively; the outlet of the second one-way valve (6-2), the third interface of the fourth three-way valve (9-4) and the third interface of the third three-way valve (9-3) are converged and then connected with the first interface of the first four-way reversing valve (8-1), and one end of the third stop valve (7-3) is connected to a pipeline between a convergence point and the first interface of the first four-way reversing valve (8-1); the outlet of the third one-way valve (6-3) is respectively connected with a third interface of the first four-way reversing valve (8-1) and one end of the second stop valve (7-2); the second interface of the first four-way reversing valve (8-1) is connected with the air suction port of the first compressor (1-1), and the fourth interface of the first four-way reversing valve (8-1) is connected with the air discharge port of the first compressor (1-1); the other end of the second stop valve (7-2) is respectively connected with a third interface of the second four-way reversing valve (8-2) and the indoor heat exchanger (5); the first interface of the second four-way reversing valve (8-2) is respectively connected with the other end of the third stop valve (7-3), the first interface of the third three-way valve (9-3) and the first interface of the fourth three-way valve (9-4); the second interface of the third three-way valve (9-3) is connected with the first outdoor fin heat exchanger (2-1); the second interface of the fourth three-way valve (9-4) is connected with the second outdoor fin heat exchanger (2-2); the second interface of the second four-way reversing valve (8-2) is connected with the air suction port of the second compressor (1-2), and the fourth interface of the second four-way reversing valve (8-2) is connected with the air discharge port of the second compressor (1-2); the indoor heat exchanger (5) is connected with one end of the first stop valve (7-1), the first interface of the first three-way valve (9-1) and the third interface of the second three-way valve (9-2) after passing through the fourth throttle valve (4-4); the second port of the first three-way valve (9-1) is connected with the first outdoor fin heat exchanger (2-1) through the second throttle valve (4-2); the second port of the second three-way valve (9-2) is connected with the second outdoor fin heat exchanger (2-2) through a third throttle valve (4-3); the first stop valve (7-1) is respectively connected with the other end of the PVT component (3), the third interface of the first three-way valve (9-1) and the first interface of the second three-way valve (9-2) through the first throttle valve (4-1); when the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternating defrosting and uninterrupted heat supply is the uninterrupted heat supply defrosting mode, the first outdoor fin heat exchanger is defrosted and the second outdoor fin heat exchanger is the room continuous heat supply mode, the first stop valve (7-1), the second stop valve (7-2) and the third stop valve (7-3) are closed; the first interface of the first four-way reversing valve (8-1) is communicated with the fourth interface of the first four-way reversing valve (8-1), and the second interface of the first four-way reversing valve (8-1) is communicated with the third interface of the first four-way reversing valve (8-1); the first interface of the second four-way reversing valve (8-2) is communicated with the second interface of the second four-way reversing valve (8-2), and the third interface of the second four-way reversing valve (8-2) is communicated with the fourth interface of the second four-way reversing valve (8-2); the first compressor (1-1) and the second compressor (1-2) are started; the second port of the first three-way valve (9-1) is communicated with the third port of the first three-way valve (9-1), the second port of the second three-way valve (9-2) is communicated with the third port of the second three-way valve (9-2), the second port of the third three-way valve (9-3) is communicated with the third port of the third three-way valve (9-3), and the first port of the fourth three-way valve (9-4) is communicated with the second port of the fourth three-way valve (9-4); the photovoltaic cells in the PVT assembly (3) generate electricity under the irradiation of sunlight, and the electricity is changed into electricity used by a user through the adjustment of the inverter (10);
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternating defrosting and uninterrupted heat supply is the uninterrupted heat supply defrosting mode, the second outdoor fin heat exchanger is defrosted, and the first outdoor fin heat exchanger is the room continuous heat supply mode; closing the first stop valve (7-1), the second stop valve (7-2) and the third stop valve (7-3); the first interface of the first four-way reversing valve (8-1) is communicated with the fourth interface of the first four-way reversing valve (8-1), and the second interface of the first four-way reversing valve (8-1) is communicated with the third interface of the first four-way reversing valve (8-1); the first interface of the second four-way reversing valve (8-2) is communicated with the second interface of the second four-way reversing valve (8-2), and the third interface of the second four-way reversing valve (8-2) is communicated with the fourth interface of the second four-way reversing valve (8-2); the first compressor (1-1) and the second compressor (1-2) are started; the first port of the first three-way valve (9-1) is communicated with the second port of the first three-way valve (9-1), the first port of the second three-way valve (9-2) is communicated with the second port of the second three-way valve (9-2), the first port of the third three-way valve (9-3) is communicated with the second port of the third three-way valve (9-3), and the second port of the fourth three-way valve (9-4) is communicated with the third port of the fourth three-way valve (9-4); the photovoltaic cells in the PVT assembly (3) generate electricity under the irradiation of sunlight, and the electricity is changed into electricity used by a user through the adjustment of the inverter (10);
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting and uninterrupted heat supply is a mode of defrosting the first outdoor fin heat exchanger and simultaneously defrosting the second outdoor fin heat exchanger of intermittent heat supply, the indoor heat exchanger stops heat supply, a first stop valve (7-1) is closed, and a second stop valve (7-2) and a third stop valve (7-3) are opened; the first interface of the first four-way reversing valve (8-1) is communicated with the fourth interface of the first four-way reversing valve (8-1), and the second interface of the first four-way reversing valve (8-1) is communicated with the third interface of the first four-way reversing valve (8-1); the first interface of the second four-way reversing valve (8-2) is communicated with the fourth interface of the second four-way reversing valve (8-2), and the second interface of the second four-way reversing valve (8-2) is communicated with the third interface of the second four-way reversing valve (8-2); the first compressor (1-1) and the second compressor (1-2) are started; the second port of the first three-way valve (9-1) is communicated with the third port of the first three-way valve (9-1), the first port of the second three-way valve (9-2) is communicated with the second port of the second three-way valve (9-2), the first port of the third three-way valve (9-3) is communicated with the second port of the third three-way valve (9-3), and the second port of the fourth three-way valve (9-4) is communicated with the third port of the fourth three-way valve (9-4); the photovoltaic cells in the PVT assembly (3) generate electricity under the irradiation of sunlight, and the electricity is changed into electricity used by a user through the adjustment of the inverter (10);
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting uninterrupted heat supply is a PVT heat supply mode, a first stop valve (7-1), a second stop valve (7-2) and a third stop valve (7-3) are opened, a second port of the first three-way valve (9-1) is communicated with a third port of the first three-way valve (9-1), a first port of the second three-way valve (9-2) is communicated with a second port of the second three-way valve (9-2), a first port of the third three-way valve (9-3) is communicated with a second port of the third three-way valve (9-3), and a first port of the fourth three-way valve (9-4) is communicated with a second port of the fourth three-way valve (9-4); the first interface of the first four-way reversing valve (8-1) is communicated with the second interface of the first four-way reversing valve (8-1), and the third interface of the first four-way reversing valve (8-1) is communicated with the fourth interface of the first four-way reversing valve (8-1); the first interface of the second four-way reversing valve (8-2) is communicated with the second interface of the second four-way reversing valve (8-2), and the third interface of the second four-way reversing valve (8-2) is communicated with the fourth interface of the second four-way reversing valve (8-2); the first compressor (1-1) and the second compressor (1-2) are started; the photovoltaic cells in the PVT assembly (3) generate electricity under the irradiation of sunlight, and the electricity is changed into electricity used by a user through the adjustment of the inverter (10); the air suction port of the first compressor (1-1) and the air suction port of the second compressor (1-2) are used for sucking low-temperature refrigerant gas from the PVT assembly (3) through a second one-way valve (6-2) and a first one-way valve (6-1), compressing and boosting the low-temperature refrigerant gas through the first compressor (1-1) and the second compressor (1-2) to be high-pressure high-temperature superheated gas, and enabling the high-pressure high-temperature superheated gas to enter the indoor heat exchanger (5); when the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting uninterrupted heat supply is an air source heat supply mode, the first stop valve (7-1) is closed, and the second stop valve (7-2) and the third stop valve (7-3) are opened; the first port of the first three-way valve (9-1) is communicated with the second port of the first three-way valve (9-1), the second port of the second three-way valve (9-2) is communicated with the third port of the second three-way valve (9-2), the first port of the third three-way valve (9-3) is communicated with the second port of the third three-way valve (9-3), and the second port of the fourth three-way valve (9-4) is communicated with the third port of the fourth three-way valve (9-4); the first interface of the first four-way reversing valve (8-1) is communicated with the second interface of the first four-way reversing valve (8-1), and the third interface of the first four-way reversing valve (8-1) is communicated with the fourth interface of the first four-way reversing valve (8-1); the first interface of the second four-way reversing valve (8-2) is communicated with the second interface of the second four-way reversing valve (8-2), and the third interface of the second four-way reversing valve (8-2) is communicated with the fourth interface of the second four-way reversing valve (8-2); the first compressor (1-1) and the second compressor (1-2) are started; the photovoltaic cells in the PVT assembly (3) generate electricity under the irradiation of sunlight, and the electricity is changed into electricity used by a user through the adjustment of the inverter (10);
When the single-stage parallel PVT-air source multi-split heat pump air conditioning system mode of alternate defrosting uninterrupted heat supply is an air source refrigeration mode, the first stop valve (7-1) is closed, and the second stop valve (7-2) and the third stop valve (7-3) are opened; the first port of the first three-way valve (9-1) is communicated with the second port of the first three-way valve (9-1), the second port of the second three-way valve (9-2) is communicated with the third port of the second three-way valve (9-2), the first port of the third three-way valve (9-3) is communicated with the second port of the third three-way valve (9-3), and the second port of the fourth three-way valve (9-4) is communicated with the third port of the fourth three-way valve (9-4); the first interface of the first four-way reversing valve (8-1) is communicated with the fourth interface of the first four-way reversing valve (8-1), and the second interface of the first four-way reversing valve (8-1) is communicated with the third interface of the first four-way reversing valve (8-1); the first interface of the second four-way reversing valve (8-2) is communicated with the fourth interface of the second four-way reversing valve (8-2), and the second interface of the second four-way reversing valve (8-2) is communicated with the third interface of the second four-way reversing valve (8-2); the opening modulation of the second throttle valve (4-2) and the third throttle valve (4-3) is maximum; the first compressor (1-1) and the second compressor (1-2) are started; photovoltaic cells in the PVT assembly (3) generate electricity under the irradiation of sunlight, and the electricity is changed into electricity used by a user through an inverter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310148514.0A CN116045404B (en) | 2023-02-22 | 2023-02-22 | Single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310148514.0A CN116045404B (en) | 2023-02-22 | 2023-02-22 | Single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116045404A CN116045404A (en) | 2023-05-02 |
| CN116045404B true CN116045404B (en) | 2024-04-19 |
Family
ID=86113386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310148514.0A Active CN116045404B (en) | 2023-02-22 | 2023-02-22 | Single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116045404B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10232073A (en) * | 1997-02-20 | 1998-09-02 | Fujitsu General Ltd | Air conditioner |
| CN104764112A (en) * | 2015-04-19 | 2015-07-08 | 上海交通大学 | Air conditioning system achieving indoor uninterruptible heating in defrosting process |
| CN106595112A (en) * | 2016-12-10 | 2017-04-26 | 东北电力大学 | Solar heat accumulation type two-stage compressed air source heat pump system and operation method thereof |
| CN107401855A (en) * | 2017-08-03 | 2017-11-28 | 大连理工大学 | A kind of PVT heat pumps that timesharing thermoelectricity cold supply round the clock is realized using solar radiation and sky cold emission |
| CN210089208U (en) * | 2019-05-30 | 2020-02-18 | 天津商业大学 | Air source heat pump system with double evaporators defrosting without shutdown by utilizing sensible heat |
| CN113375207A (en) * | 2021-05-23 | 2021-09-10 | 北京工业大学 | Air source heat pump heating system capable of defrosting without stopping |
| CN113847754A (en) * | 2021-09-16 | 2021-12-28 | 中国建筑西南设计研究院有限公司 | Multi-evaporator alternating defrosting air source heat pump unit and operation control method thereof |
-
2023
- 2023-02-22 CN CN202310148514.0A patent/CN116045404B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10232073A (en) * | 1997-02-20 | 1998-09-02 | Fujitsu General Ltd | Air conditioner |
| CN104764112A (en) * | 2015-04-19 | 2015-07-08 | 上海交通大学 | Air conditioning system achieving indoor uninterruptible heating in defrosting process |
| CN106595112A (en) * | 2016-12-10 | 2017-04-26 | 东北电力大学 | Solar heat accumulation type two-stage compressed air source heat pump system and operation method thereof |
| CN107401855A (en) * | 2017-08-03 | 2017-11-28 | 大连理工大学 | A kind of PVT heat pumps that timesharing thermoelectricity cold supply round the clock is realized using solar radiation and sky cold emission |
| CN210089208U (en) * | 2019-05-30 | 2020-02-18 | 天津商业大学 | Air source heat pump system with double evaporators defrosting without shutdown by utilizing sensible heat |
| CN113375207A (en) * | 2021-05-23 | 2021-09-10 | 北京工业大学 | Air source heat pump heating system capable of defrosting without stopping |
| CN113847754A (en) * | 2021-09-16 | 2021-12-28 | 中国建筑西南设计研究院有限公司 | Multi-evaporator alternating defrosting air source heat pump unit and operation control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116045404A (en) | 2023-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108759144A (en) | A kind of superposition type ultra-low temperature air source heat pump unit and its control method | |
| CN101713599B (en) | Air-conditioning heat pump device | |
| CN106595112B (en) | Solar heat-preservation type Two-stage Compression air source heat pump system and its operation method | |
| CN211526570U (en) | Outdoor unit and composite heat pump system | |
| CN116164360A (en) | Overlapping type compression multi-cycle PVT-air source multi-split heat pump air conditioning system for defrosting of outdoor heat source | |
| CN106839217B (en) | Combined heat pump air conditioning system capable of independently operating in de-electrification mode and control method thereof | |
| CN201100796Y (en) | Thermal pump unit of combined flow saving device | |
| CN111156726B (en) | Air source heat pump system based on soil cross-season heat accumulation defrosting and solar intermittent utilization and application method thereof | |
| CN108759157B (en) | One-time throttling two-stage compression heat pump system | |
| CN108278793B (en) | Heat pump system capable of realizing variable flow single-stage compression cycle and cascade cycle | |
| CN116045404B (en) | Single-stage parallel PVT-air source multi-split heat pump air conditioning system with alternate defrosting and uninterrupted heat supply | |
| CN115031438B (en) | Efficient defrosting heat pump type small air conditioner | |
| CN216048111U (en) | Double-source integrated air source heat pump unit with total heat recovery | |
| CN219141146U (en) | Novel air source heat pump unit of defrosting mode | |
| CN101949617B (en) | High-efficiency air source heat pump device and method for preparing water and air simultaneously | |
| CN116255755B (en) | Double-stage compression PVT-air source heat pump system with alternate defrosting and uninterrupted heat supply functions | |
| CN116182432B (en) | Overlapping type compressed PVT-air source heat pump system for supplying heat without intermittent defrosting alternately | |
| CN101078574A (en) | Highly effective heating and refrigerating air source heat pump air conditioner suitable for wide temperature environment | |
| CN211575592U (en) | Air source heat pump system based on soil seasonal heat storage defrosting and solar intermittent utilization | |
| CN116045403B (en) | Ice cold-storage PVT multi-split central air-conditioning heat pump and hot water system | |
| CN108759156B (en) | Secondary throttling middle incomplete cooling two-stage compression heat pump system | |
| CN116294270B (en) | Cold and hot double-storage PVT multi-split central air-conditioning heat pump system | |
| CN110953654A (en) | Outdoor unit and composite heat pump system | |
| CN201028867Y (en) | Air source heat pump air conditioner suitable for low air temperature surroundings | |
| CN116007092B (en) | Graded compression refrigeration/heating system and method for temperature and humidity independent air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |