CN108180668B - Single-stage and double-stage heat pump heating and refrigerating system and control method - Google Patents
Single-stage and double-stage heat pump heating and refrigerating system and control method Download PDFInfo
- Publication number
- CN108180668B CN108180668B CN201810040087.3A CN201810040087A CN108180668B CN 108180668 B CN108180668 B CN 108180668B CN 201810040087 A CN201810040087 A CN 201810040087A CN 108180668 B CN108180668 B CN 108180668B
- Authority
- CN
- China
- Prior art keywords
- heat pump
- source heat
- channel
- air source
- condensation
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a single-double-stage heat pump heating and refrigerating system and a control method, wherein an air source heat pump evaporator is respectively connected with an air source heat pump compressor and a condensation-evaporation three-channel heat exchanger through an air source heat pump four-way valve, and the condensation-evaporation three-channel heat exchanger is connected with the air source heat pump evaporator through an air source heat pump expansion valve to form a first circulation loop; the condensation-evaporation three-channel heat exchanger is connected with a water source heat pump condenser through a water source heat pump compressor, and the water source heat pump condenser is connected with the condensation-evaporation three-channel heat exchanger through a water source heat pump expansion valve to form a second circulation loop; the water source heat pump condenser is connected with the energy storage water tank and then connected with the energy supply and return pipeline through the first circulating pump to form a third circulating loop; the energy storage water tank is connected with a condensation-evaporation three-channel heat exchanger through a second circulating pump, and the condensation-evaporation three-channel heat exchanger is connected with the energy storage water tank; the energy storage water tank is connected with an energy supply water outlet pipeline through a first valve and a second valve. The invention realizes high-temperature heating and low-temperature refrigeration and has the advantage of higher energy efficiency of the system.
Description
Technical Field
The invention relates to the field of heat pump application, in particular to a single-stage and double-stage heat pump heating and refrigerating system and a control method.
Background
The similar heat pump systems in the market are mainly cascade systems. The existing system has the following problems: 1. when the system is used for heating, the system can only run in two stages, cannot be in a single stage, and has low heating energy efficiency ratio; 2. the system can only heat, can not refrigerate, and has single function; 3. when the system is frosted, the heat at the tail end is absorbed, so that the heating comfort is affected; 4. the heat-insulating room is not needed, the problem of freeze prevention is not thoroughly solved, and the water pump, the water tank and the like need to occupy the indoor space of the building.
Disclosure of Invention
The invention provides a single-stage and double-stage heat pump heating and refrigerating system which can realize high-temperature heating and low-temperature refrigerating and has higher energy efficiency.
The technical scheme adopted for solving the technical problems is as follows:
a single-stage and double-stage heat pump heating and refrigerating system comprises a first circulation loop, a second circulation loop, a third circulation loop, an air source heat pump evaporator and a condensation-evaporation three-channel heat exchanger.
The air source heat pump evaporator is connected with an air source heat pump four-way valve, the air source heat pump four-way valve is respectively connected with the air source heat pump compressor and a first channel of the condensation-evaporation three-way heat exchanger, and the first channel of the condensation-evaporation three-way heat exchanger is connected with an inlet end of the air source heat pump evaporator through an air source heat pump expansion valve to form a first circulation loop;
the second channel of the condensation-evaporation three-channel heat exchanger is connected with one end of the first channel of the water source heat pump condenser through the water source heat pump compressor, and the other end of the first channel of the water source heat pump condenser is connected with the second channel of the condensation-evaporation three-channel heat exchanger through the water source heat pump expansion valve to form a second circulation loop;
one end of a second channel of the water source heat pump condenser is connected with the energy storage water tank through a first pipeline, and the other end of the second channel is connected with an energy supply water return pipeline through a first circulating pump to form a third circulating loop;
the energy storage water tank is connected with one end of a third channel of the condensation-evaporation three-channel heat exchanger through a second circulating pump, and the other end of the third channel of the condensation-evaporation three-channel heat exchanger is connected with the energy storage water tank through a second pipeline;
the energy storage water tank on be equipped with two export, one export is connected energy supply outlet pipe through first valve, and another export is connected energy supply outlet pipe through the second valve, the export of first valve and second valve interconnect.
The air source heat pump four-way valve comprises four communication ports, namely a communication port A, a communication port B, a communication port C and a communication port D, wherein an outlet of the air source heat pump evaporator is connected with the communication port A, the communication port D is connected with an inlet of an air source heat pump compressor, an outlet of the air source heat pump compressor is connected with the communication port C, and the communication port B is connected with a first channel of the condensation-evaporation three-way heat exchanger.
The energy storage water tank is a layered water tank, and an electric heater is arranged in the energy storage water tank.
The energy storage water tank comprises a shell, an outer sleeve is arranged in the shell, a first through hole is formed in the wall of the outer sleeve, a first pipeline penetrates through the shell and stretches into the outer sleeve, and a second pipeline stretches into the outer sleeve along the length direction of the outer sleeve.
The energy storage water tank comprises a shell, an inner sleeve is arranged in the outer sleeve, a second through hole is formed in the wall of the inner sleeve, the first pipeline sequentially penetrates through the shell and the outer sleeve and stretches into the inner sleeve, and the second pipeline stretches into the inner sleeve along the length direction of the inner sleeve.
The first through holes are formed in a circle along the circumferential direction of the outer sleeve at intervals, a plurality of rows of first through holes are formed in the circle along the length direction of the outer sleeve at intervals, the second through holes are formed in a circle along the circumferential direction of the inner sleeve at intervals, a plurality of rows of second through holes are formed in the circle along the length direction of the inner sleeve at intervals, and the positions of the first through holes and the second through holes are crossed in the length direction.
The connecting pipeline of the first circulation loop and the second circulation loop is a copper pipe, and a circulation medium in the copper pipe is a refrigerant.
Further, the device also comprises a heat preservation room;
an air source heat pump compressor, an air source heat pump four-way valve, a condensation-evaporation three-way heat exchanger, an air source heat pump expansion valve, a water source heat pump compressor, a water source heat pump condenser, a water source heat pump expansion valve, an energy storage water tank, a first circulating pump and a second circulating pump are arranged in the heat preservation room
The air source heat pump evaporator is arranged on the outer side or the roof of the heat insulation room.
The first valve and the second valve are arranged on the outer side of the heat-insulating room. The first valve and the second valve are electric valves; a first temperature detector is arranged on a pipeline of the water source heat pump condenser connected with the first circulating pump; the inside of the heat preservation room is provided with a third temperature detector, and the outside of the heat preservation room is provided with a second temperature detector.
The invention also provides a control method for heating and refrigerating by using the single-stage and double-stage heat pump heating and refrigerating system, which comprises the following steps:
the control system controls the start and stop of the first circulating pump, the second circulating pump, the first circulating loop and the second circulating loop according to the set temperature, the received first temperature information and the received second temperature information;
when heating, when the temperature of the first temperature detector is lower than the set temperature, starting the first circulating pump, and operating the third circulating loop, and if the temperature of the second temperature detector is lower than the set temperature, starting the operation of the equipment of the first circulating loop and the equipment of the second circulating loop, so as to perform heating; if the second temperature detector is higher than the set temperature at the moment, starting the equipment of the first circulation loop and the second circulation pump to perform heating;
when the temperature of the first temperature detector is higher than the set temperature during refrigeration, the first circulating pump and the second circulating pump are started, and the first circulating loop performs reverse operation refrigeration;
the temperature information is sent to a control system through a third temperature detector, and the control system controls the start and stop of an antifreezing system in the heat preservation room according to the received third temperature information; and sending temperature information to a control system through a fourth temperature detector, wherein the control system controls the start and stop of an electric heater in the energy storage water tank according to the received fourth temperature information.
Specifically, when the ambient temperature is lower than the set temperature during heating, the heat generated by the first circulation loop is used as a heat source of the second circulation loop to supply heat to the tail end, and when the system is frosted, the second circulation loop stops running, and the energy storage water tank supplies defrosting energy to the first circulation loop;
when heating, the medium in the air source heat pump evaporator absorbs heat in the air, and enters the communication port A of the air source heat pump four-way valve, and enters the air source heat pump compressor from the communication port D through the valve body of the four-way valve, the outlet of the air source heat pump compressor is connected with the communication port C, and enters the condensation-evaporation three-channel heat exchanger to release heat from the communication port B through the valve body of the four-way valve, and returns to the air source heat pump evaporator to continue absorbing heat after passing through the air source heat pump expansion valve, so that the air source heat pump evaporator is reciprocated to be a primary heating cycle;
in the condensation-evaporation three-channel heat exchanger, a medium of the primary circulation passes through a first channel, a secondary circulation medium absorbs heat generated by the primary circulation through a second channel of the condensation-evaporation three-channel heat exchanger, enters the first channel of the water source heat pump condenser through the water source heat pump compressor, releases heat through heat exchange, returns to the condensation-evaporation three-channel heat exchanger through the water source heat pump expansion valve to continue absorbing heat, and is in a reciprocating mode to be a secondary heating cycle;
the heat released by the water source heat pump condenser is supplied by the energy supply water outlet of the energy supply water outlet pipeline, the energy supply backwater in the energy supply backwater pipeline absorbs the heat from the second channel of the water source heat pump condenser through the first circulating pump, and the heat is supplied to the energy utilization point through the energy storage water tank through the first valve, so that the heat is reciprocated;
during heating defrosting, heat in the energy storage water tank enters a third channel of the condensation-evaporation three-channel heat exchanger through the second circulating pump to provide heat for primary circulation defrosting, at the moment, the primary circulation reversely operates, a medium absorbs the heat in the condensation-evaporation three-channel heat exchanger, enters a communication port B of the air source heat pump four-way valve, exits from the communication port D through the four-way valve and enters the air source heat pump compressor, an outlet of the air source heat pump compressor is connected with the communication port C, exits from the communication port A through the four-way valve and enters the air source heat pump evaporator, the heat is released by the air source heat pump evaporator, and after defrosting media are cooled, the defrosting media return to the condensation-evaporator three-channel heat exchanger through the air source heat pump expansion valve, and the defrosting process is achieved in a reciprocating mode;
when the environment temperature is higher than the set temperature, the system runs in a single stage, heat generated by the first circulation loop is directly supplied to an energy utilization point, and when the system is defrosted, the energy storage water tank supplies defrosting energy to the first circulation loop, so that the defrosting process of the two-stage heating is consistent;
energy supply backwater in the energy supply backwater pipeline enters the energy storage water tank through the first circulating pump and the second channel of the water source heat pump condenser, absorbs heat from the energy storage water tank, and is supplied with energy through the energy supply outlet water of the energy supply water outlet pipeline through the first valve;
medium in the energy storage water tank enters a third channel of the condensation-evaporation three-channel heat exchanger through a second circulating pump, absorbs heat generated by the first circulating loop through heat exchange, and returns to the energy storage water tank;
during refrigeration, the system supplies cold energy to the energy utilization point, and energy supply backwater in the energy supply backwater pipeline releases heat from the energy storage water tank through the first circulating pump and the second channel of the water source heat pump condenser and supplies energy utilization point through the energy supply water outlet pipeline through the second valve;
medium in the energy storage water tank enters a third channel of the condensation-evaporation three-channel heat exchanger through a second circulating pump, and the third channel of the condensation-evaporation three-channel heat exchanger is connected with an operation circulating loop of the energy storage water tank through a second pipeline;
during refrigeration, a medium absorbs heat in the three-way heat exchanger of the condensation-evaporator, enters the communication port B of the four-way valve of the air source heat pump, passes through the four-way valve, and enters the air source heat pump compressor, the outlet of the air source heat pump compressor is connected with the communication port C, passes through the four-way valve, and exits from the communication port A, enters the air source heat pump evaporator, and releases heat in the air source heat pump evaporator, so that the air source heat pump evaporator reciprocates.
Compared with the existing cascade heat pump technology, the invention can realize the efficient operation of heating and refrigerating, when heating, the system intelligently controls the single-stage or double-stage operation of the heat pump according to the temperature of the environment, and when the temperature of the environment is lower than the set temperature, the system is operated in double stages; when the ambient temperature is higher than the set temperature, the system operates in a single stage. During refrigeration, the first circulation pipeline supplies cold to the tail end. The energy storage water tank is internally provided with a layered structure, so that the temperature at the upper part of the water tank is rapidly increased, high-temperature heating and low-temperature refrigeration can be realized through switching of heating and refrigeration water taking points, and the energy efficiency of the system is higher. Through the setting of split installation mode, the system has realized highly integrated, when very big simplified on-the-spot installation, also better solution freeze-proof problem. The auxiliary electric heating is arranged in the energy storage water tank, so that the unit defrosting is avoided to absorb heat at the tail end, the heating comfort is improved, and the tail end energy supply can be supplemented.
Drawings
FIG. 1 is a schematic diagram of an apparatus of the present invention;
FIG. 2 is a schematic diagram of a heating dual stage operation of the present invention;
FIG. 3 is a schematic diagram of the heating single stage operation of the present invention;
FIG. 4 is a schematic diagram of the refrigeration operation of the present invention;
FIG. 5 is a schematic view of the layered sleeve of the present invention;
fig. 6 is a perspective view of the internal structure of fig. 5.
In the figure: 1. an air source heat pump evaporator; 2. an air source heat pump four-way valve; 3. an air source heat pump compressor; 4. a condensing-evaporating three-channel heat exchanger; 5. an air source heat pump expansion valve; 6. a water source heat pump compressor; 7. a water source heat pump condenser; 8. a water source heat pump expansion valve; 9. an energy storage water tank; 10. an electric heater; 11. a first circulation pump; 12. a second circulation pump; 13. a first valve; 14. a second valve; 15. a heat preservation room; 16. an energy supply water outlet pipeline; 17. an energy supply water return pipeline; 18. a layering sleeve; 19. a fourth temperature detector; 20. a first temperature detector; 21. a second temperature detector 22; 23. a first pipe; 24. a second pipe; 25. a housing; 26. an outer sleeve 27. An inner sleeve; 28. first through hole 29. Second through hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings, which are not intended to limit the invention.
Referring to fig. 1, a single-stage and double-stage heat pump heating and refrigerating system comprises a first circulation loop, a second circulation loop, a third circulation loop, an air source heat pump evaporator 1 and a condensation-evaporation three-channel heat exchanger 4;
the air source heat pump evaporator 1 is connected with the air source heat pump four-way valve 2, the air source heat pump four-way valve 2 is respectively connected with the air source heat pump compressor 3 and the first channel of the condensation-evaporation three-channel heat exchanger 4, and the first channel of the condensation-evaporation three-channel heat exchanger 4 is connected with the inlet end of the air source heat pump evaporator 1 through the air source heat pump expansion valve 5 to form a first circulation loop;
the second channel of the condensation-evaporation three-channel heat exchanger 4 is connected with one end of a first channel of the water source heat pump condenser 7 through the water source heat pump compressor 6, and the other end of the first channel of the water source heat pump condenser 7 is connected with the second channel of the condensation-evaporation three-channel heat exchanger 4 through the water source heat pump expansion valve 8 to form a second circulation loop;
one end of a second channel of the water source heat pump condenser 7 is connected with the energy storage water tank 9 through a first pipeline 23, and the other end of the second channel is connected with the energy supply water return pipeline 17 through a first circulating pump 11 to form a third circulating loop;
the energy storage water tank 9 is connected with one end of a third channel of the condensation-evaporation three-channel heat exchanger 4 through a second circulating pump 12, and the other end of the third channel of the condensation-evaporation three-channel heat exchanger 4 is connected with the energy storage water tank 9 through a second pipeline 24;
the energy storage water tank 9 is provided with two outlets, one outlet is connected with an energy supply water outlet pipeline 16 through a first valve 13, the other outlet is connected with the energy supply water outlet pipeline 16 through a second valve 14, and the outlets of the first valve 13 and the second valve 14 are connected with each other.
The invention realizes the high-efficiency operation of heating and refrigerating of the whole system by switching the single-stage operation mode and the double-stage operation mode.
On the basis of the embodiment, the air source heat pump four-way valve 2 comprises four communication ports, namely a communication port A, a communication port B, a communication port C and a communication port D, wherein the outlet of the air source heat pump evaporator 1 is connected with the communication port A, the communication port D is connected with the inlet of the air source heat pump compressor 3, the outlet of the air source heat pump compressor 3 is connected with the communication port C, and the communication port B is connected with the first channel of the condensation-evaporation three-channel heat exchanger 4.
In this embodiment, based on the above embodiment, the energy storage water tank 9 is a layered water tank, and the electric heater 10 is disposed in the energy storage water tank 9.
Preferably, in this embodiment, the tank 9 includes a housing 25, an outer sleeve 26 is disposed in the housing 25, a first through hole 28 is disposed on a wall of the outer sleeve 26, the first pipe 23 penetrates through the housing 25 and extends into the outer sleeve 26, and the second pipe 24 extends into the outer sleeve 26 along a length direction of the outer sleeve 26.
Referring to fig. 1, 5 and 6, the inner sleeve may further be included, the layered sleeve 18 is disposed in the housing, the layered sleeve 18 includes an outer sleeve 26 and an inner sleeve 27, the outer sleeve 26 is disposed in the housing 25, the inner sleeve 27 is disposed in the outer sleeve 26, a first through hole 28 is disposed on the wall of the outer sleeve 25, a second through hole 29 is disposed on the wall of the inner sleeve 27, the first pipe 23 sequentially passes through the housing 25 and the outer sleeve 26, and stretches into the inner sleeve 27, and the second pipe 24 stretches into the inner sleeve 27 along the length direction of the inner sleeve 27.
Preferably, the first through holes 28 are provided at a distance of one turn along the circumferential direction of the outer sleeve 26 to form a row of first through holes, a plurality of rows of first through holes are provided at a distance of one turn along the longitudinal direction of the outer sleeve 26, the second through holes 29 are provided at a distance of one turn along the circumferential direction of the inner sleeve 27 to form a row of second through holes, a plurality of rows of second through holes are provided at a distance of one turn along the longitudinal direction of the inner sleeve 27, and the positions of the row of first through holes and the row of second through holes are disposed to intersect in the longitudinal direction.
The auxiliary electric heater is arranged in the energy storage water tank, so that the heat of a unit defrosting absorption terminal system is avoided, the heating comfort is improved, and the terminal energy supply can be supplemented. The layered water tank is adopted to enable the upper temperature of the energy storage water tank to be high, the lower temperature of the energy storage water tank to be low, the effects of high-temperature heating and low-temperature refrigeration are achieved, the system has the advantage of quick starting, and meanwhile heat or cold in the energy storage water tank can be fully utilized.
Specifically, the connecting pipeline of the first circulation loop and the second circulation loop is a copper pipe, and a circulation medium in the copper pipe is a refrigerant. The refrigerant is a circulating medium, different circulating mediums can be adopted in the first circulating loop and the second circulating loop, preferably, the first circulating loop is a first-stage circulating medium R410A, and the second circulating loop is a second-stage circulating medium R134A.
The circulating loops in the heat pump unit are all copper pipes, and the circulating loops for connecting the copper pipes in the system are all parts of the heat pump unit.
The embodiment further comprises a heat preservation room 15 based on the embodiment;
an air source heat pump compressor 3, an air source heat pump four-way valve 2, a condensation-evaporation three-way heat exchanger 4, an air source heat pump expansion valve 5, a water source heat pump compressor 6, a water source heat pump condenser 7, a water source heat pump expansion valve 8, an energy storage water tank 9, a first circulating pump 11 and a second circulating pump 12 are arranged in the heat preservation room 15;
the air source heat pump evaporator 1 is arranged outside or on the roof of the insulation house 15. For ease of control, the first valve 13 and the second valve 14 are arranged outside the insulation.
The air source heat pump evaporator can be arranged far away from the heat preservation room, can be placed on the side surface of the heat preservation room, and can also be arranged on the roof of the heat preservation room, namely, the air source heat pump evaporator and the heat preservation room are integrally arranged.
The system of the invention is in a split type, and other parts except the air source heat pump evaporator are all arranged in the heat insulation room. By integrating all components of the two-stage heat pump except the air source heat pump evaporator in the heat insulation room, high integration is realized, the field installation is greatly simplified, and meanwhile, the anti-freezing problem is better solved.
For automatic control, the first valve 13 and the second valve 14 are electric valves; a first temperature detector 20 is arranged on a pipeline of the water source heat pump condenser 7 connected with the first circulating pump 11; a third temperature detector 22 is arranged in the heat preservation room 15, and a second temperature detector 21 is arranged outside the heat preservation room 15.
Referring to fig. 1, the invention also provides a control method for heating and refrigerating by using the single-stage and double-stage heat pump heating and refrigerating system, which comprises the following steps:
the first temperature detector 20 sends first temperature information to the control system, and the second temperature detector 21 sends second temperature information to the control system, and the control system controls the start and stop of the first circulating pump, the second circulating pump, the first circulating loop and the second circulating loop according to the set temperature and the received first temperature information and second temperature information;
when heating, when the temperature of the first temperature detector 20 is lower than the set temperature, the first circulating pump 11 is started, the third circulating loop is operated, and if the temperature of the second temperature detector 21 is lower than the set temperature at this time, the system is operated for heating in two stages, namely, the equipment of the first circulating loop and the equipment of the second circulating loop are both started to operate for heating; if the second temperature detector 21 is higher than the set temperature at this time, the system operates heating in a single stage, that is, the equipment of the first circulation loop and the second circulation pump start to operate heating;
when the temperature of the first temperature detector 20 is higher than the set temperature during refrigeration, the first circulating pump and the second circulating pump are started, and the first circulating loop is used for reverse operation refrigeration;
sending temperature information to a control system through a third temperature detector 22, wherein the control system controls an antifreezing system in the heat preservation room according to the received third temperature information; the temperature information is sent to the control system through the fourth temperature detector 19, and the control system controls the start and stop of the electric heater in the energy storage water tank according to the received fourth temperature information.
The antifreezing system is characterized in that a heat tracing belt or an electrothermal film arranged in a heat preservation room is used as the antifreezing system.
The invention can automatically switch heating and refrigerating water taking points to realize high-temperature heating and low-temperature cooling.
The intelligent control system can realize efficient heating and refrigerating operation through intelligent control: when heating, the system intelligently controls the heat pump to run in a single stage or a double stage according to the temperature of the environment, and when the temperature of the environment is lower than the set temperature, the system runs in the double stage; when the ambient temperature is higher than the set temperature, the system operates in a single stage. During refrigeration, the first circulation loop cools the tail end.
Referring to fig. 2, during heating, when the ambient temperature is lower than the set temperature, the system is operated in two stages, the heat generated by the first circulation loop is used as a heat source of the second circulation loop to supply heat to the tail end, and during defrosting of the system, the second circulation loop stops operating, and the energy storage water tank 9 supplies defrosting energy to the first circulation loop.
During heating operation, the medium in the air source heat pump evaporator 1 absorbs heat in the air, enters the communication port A of the air source heat pump four-way valve 2, passes through the valve body of the four-way valve, and exits from the communication port D to enter the air source heat pump compressor 3, the outlet of the air source heat pump compressor 3 is connected with the communication port C, passes through the valve body of the four-way valve, exits from the communication port B to enter the condensation-evaporation three-channel heat exchanger 4 to release heat, and returns to the air source heat pump evaporator 1 after passing through the air source heat pump expansion valve 5 to continuously absorb heat, so that the air source heat pump evaporator is reciprocated, and the air source heat pump evaporator is a primary heating cycle.
The condensation-evaporation three-channel heat exchanger 4 is a three-channel heat exchanger, a medium of the first-stage circulation passes through the first channel, a second-stage circulation medium absorbs heat generated by the first-stage circulation through the second channel of the condensation-evaporation three-channel heat exchanger 4, the heat enters the first channel of the water source heat pump condenser 7 through the water source heat pump compressor 6, the heat is released through heat exchange, and the heat returns to the condensation-evaporation three-channel heat exchanger 4 to absorb heat continuously, and the circulation is the second-stage heating circulation.
The water source heat pump condenser 7 is a double-channel heat exchanger, heat emitted by the water source heat pump condenser 7 is supplied by energy supply water through an energy supply water outlet pipeline 16, energy supply backwater in an energy supply backwater pipeline 17 absorbs heat from the second channel of the water source heat pump condenser 7 through a first circulating pump 11, and the heat is supplied to an energy utilization point through an energy storage water tank 9 and a first valve 13, so that the heat supply is reciprocated.
When the system is used for heating and defrosting, heat in the energy storage water tank 9 enters a third channel of the condensation-evaporation three-channel heat exchanger 4 through the second circulating pump 12 to provide heat for primary circulation defrosting, at the moment, the primary circulation reversely operates, a medium absorbs heat in the condensation-evaporation three-channel heat exchanger 4, enters a communication port B of the air source heat pump four-way valve 2, passes through the four-way valve, and exits from the communication port D, enters the air source heat pump compressor 3, the outlet of the air source heat pump compressor 3 is connected with the communication port C, passes through the four-way valve, exits from the communication port A, enters the air source heat pump evaporator 1, releases heat in the air source heat pump evaporator 1 to defrost, and after the medium is cooled, the medium returns to the condensation-evaporator three-channel heat exchanger 4 through the air source heat pump expansion valve 5 to reciprocate, so that the defrosting process is realized.
Referring to fig. 3, when the ambient temperature is higher than the set temperature during heating, the system operates in a single stage, heat generated by the first circulation loop is directly supplied to the energy utilization point, and when the system is defrosted, the energy storage water tank 9 supplies defrosting energy to the first circulation loop, so that the defrosting flow of the two-stage heating is consistent.
When the single-stage operation is performed, the heating process of the first circulation loop is the same as that when the two-stage operation is performed, and the first circulation loop stops operating. When in single-stage operation, the circulation process of unit defrosting is the same as that when in double-stage operation.
The energy supply backwater in the energy supply backwater pipeline 17 enters the energy storage water tank 9 through the first circulating pump 11 and the second channel of the water source heat pump condenser 7, absorbs heat from the energy storage water tank 9, and is supplied with energy through the energy supply water outlet pipeline 16 through the first valve 13.
The medium in the energy storage water tank 9 enters the third channel of the condensation-evaporation three-channel heat exchanger 4 through the second circulating pump 12, absorbs the heat generated by the first circulating loop through heat exchange, and returns to the energy storage water tank 9.
Referring to fig. 4, during refrigeration, the system supplies cold energy to the energy utilization point, and energy supply backwater in an energy supply backwater pipeline 17 releases heat from the energy storage water tank 9 through the first circulating pump 11 and the second channel of the water source heat pump condenser 7, and supplies energy utilization point through the energy supply water outlet pipeline 16 through the second valve 14.
The medium in the energy storage water tank 9 enters the third channel of the condensation-evaporation three-channel heat exchanger 4 through the second circulating pump 12, and the third channel of the condensation-evaporation three-channel heat exchanger 4 is connected with the inner sleeve 27 of the energy storage water tank 9 through the second pipeline 24 to form a circulating loop.
During refrigeration, the internal circulation of the unit is similar to that during defrosting, a medium absorbs heat in the three-way heat exchanger 4 of the condensation-evaporation device, enters the communication port B of the four-way valve 2 of the air source heat pump, passes through the four-way valve, and exits from the communication port D to enter the air source heat pump compressor 3, the outlet of the air source heat pump compressor 3 is connected with the communication port C, passes through the four-way valve, exits from the communication port A to enter the air source heat pump evaporator 1, and releases heat in the air source heat pump evaporator 1, and thus the air source heat pump evaporator reciprocates.
The above embodiment is only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions made by those skilled in the art within the scope of the present invention should be included in the scope of the present invention.
Claims (6)
1. The single-stage and double-stage heat pump heating and refrigerating system is characterized by comprising a first circulation loop, a second circulation loop, a third circulation loop, an air source heat pump evaporator and a condensation-evaporation three-channel heat exchanger;
the air source heat pump evaporator is connected with an air source heat pump four-way valve, the air source heat pump four-way valve is respectively connected with the air source heat pump compressor and a first channel of the condensation-evaporation three-way heat exchanger, and the first channel of the condensation-evaporation three-way heat exchanger is connected with an inlet end of the air source heat pump evaporator through an air source heat pump expansion valve to form a first circulation loop;
the second channel of the condensation-evaporation three-channel heat exchanger is connected with one end of the first channel of the water source heat pump condenser through the water source heat pump compressor, and the other end of the first channel of the water source heat pump condenser is connected with the second channel of the condensation-evaporation three-channel heat exchanger through the water source heat pump expansion valve to form a second circulation loop;
one end of a second channel of the water source heat pump condenser is connected with the energy storage water tank through a first pipeline, and the other end of the second channel is connected with an energy supply water return pipeline through a first circulating pump to form a third circulating loop;
the energy storage water tank is connected with one end of a third channel of the condensation-evaporation three-channel heat exchanger through a second circulating pump, and the other end of the third channel of the condensation-evaporation three-channel heat exchanger is connected with the energy storage water tank through a second pipeline;
the energy storage water tank is provided with two outlets, one outlet is connected with an energy supply water outlet pipeline through a first valve, the other outlet is connected with the energy supply water outlet pipeline through a second valve, and the outlets of the first valve and the second valve are connected with each other;
the energy storage water tank is a layered water tank, and an electric heater is arranged in the energy storage water tank;
the energy storage water tank comprises a shell, an outer sleeve is arranged in the shell, a first through hole is formed in the wall of the outer sleeve, the first pipeline penetrates through the shell and stretches into the outer sleeve, and the second pipeline stretches into the outer sleeve along the length direction of the outer sleeve;
an inner sleeve is arranged in the outer sleeve, a second through hole is formed in the wall of the inner sleeve, the first pipeline sequentially penetrates through the shell and the outer sleeve and stretches into the inner sleeve, and the second pipeline stretches into the inner sleeve along the length direction of the inner sleeve;
the first through holes are arranged at intervals along the circumferential direction of the outer sleeve for one circle to form a row of first through holes, a plurality of rows of first through holes are arranged at intervals along the length direction of the outer sleeve for one circle, the second through holes are arranged at intervals along the circumferential direction of the inner sleeve for one circle to form a row of second through holes, a plurality of rows of second through holes are arranged at intervals along the length direction of the inner sleeve, and the positions of the row of first through holes and the row of second through holes are crossed in the length direction;
when heating, water is taken from an outlet connected with a first valve of the energy storage water tank;
when in refrigeration, water is taken from an outlet connected with a second valve of the energy storage water tank;
the device also comprises a heat preservation room;
an air source heat pump compressor, an air source heat pump four-way valve, a condensation-evaporation three-way heat exchanger, an air source heat pump expansion valve, a water source heat pump compressor, a water source heat pump condenser, a water source heat pump expansion valve, an energy storage water tank, a first circulating pump and a second circulating pump are arranged in the heat preservation room;
the air source heat pump evaporator is arranged on the outer side or the roof of the heat insulation room;
a first temperature detector is arranged on a pipeline of the water source heat pump condenser connected with the first circulating pump; a third temperature detector is arranged in the heat preservation room, and a second temperature detector is arranged outside the heat preservation room;
the control method for heating and refrigerating by the single-stage and double-stage heat pump heating and refrigerating system comprises the following steps:
the control system controls the start and stop of the first circulating pump, the second circulating pump, the first circulating loop and the second circulating loop according to the set temperature, the received first temperature information and the received second temperature information;
when heating, when the temperature of the first temperature detector is lower than the set temperature, starting the first circulating pump, and operating the third circulating loop, and if the temperature of the second temperature detector is lower than the set temperature, starting the operation of the equipment of the first circulating loop and the equipment of the second circulating loop, so as to perform heating; if the second temperature detector is higher than the set temperature at the moment, starting the equipment of the first circulation loop and the second circulation pump to perform heating;
when the temperature of the first temperature detector is higher than the set temperature during refrigeration, the first circulating pump and the second circulating pump are started, and the first circulating loop performs reverse operation refrigeration;
the temperature information is sent to a control system through a third temperature detector, and the control system controls the start and stop of an antifreezing system in the heat preservation room according to the received third temperature information; and sending temperature information to a control system through a fourth temperature detector, wherein the control system controls the start and stop of an electric heater in the energy storage water tank according to the received fourth temperature information.
2. The single-and-double-stage heat pump heating and refrigerating system according to claim 1, wherein the air source heat pump four-way valve comprises four communication ports, namely a communication port A, a communication port B, a communication port C and a communication port D, wherein an outlet of the air source heat pump evaporator is connected with the communication port A, the communication port D is connected with an inlet of an air source heat pump compressor, an outlet of the air source heat pump compressor is connected with the communication port C, and the communication port B is connected with a first channel of a condensation-evaporation three-way heat exchanger.
3. The single and double stage heat pump heating and cooling system according to claim 1, wherein the connection pipe of the first and second circulation loops is a copper pipe, and the circulation medium in the copper pipe is a refrigerant.
4. A single and double stage heat pump heating and cooling system according to any one of claims 1-3, wherein the first and second valves are disposed outside the insulated housing.
5. The single and dual stage heat pump heating and cooling system of claim 4, wherein the first valve and the second valve are electrically operated valves.
6. A control method for heating and cooling using the single-stage and double-stage heat pump heating and cooling system according to claim 5, comprising the steps of:
when the environment temperature is lower than the set temperature, the heat generated by the first circulation loop is used as a heat source of the second circulation loop to supply heat to the tail end, and when the system is defrosted, the second circulation loop stops running, and the energy storage water tank supplies defrosting energy to the first circulation loop;
when heating, the medium in the air source heat pump evaporator absorbs heat in the air, and enters the communication port A of the air source heat pump four-way valve, and enters the air source heat pump compressor from the communication port D through the valve body of the four-way valve, the outlet of the air source heat pump compressor is connected with the communication port C, and enters the condensation-evaporation three-channel heat exchanger to release heat from the communication port B through the valve body of the four-way valve, and returns to the air source heat pump evaporator to continue absorbing heat after passing through the air source heat pump expansion valve, so that the air source heat pump evaporator is reciprocated to be a primary heating cycle;
in the condensation-evaporation three-channel heat exchanger, a medium of the primary circulation passes through a first channel, a secondary circulation medium absorbs heat generated by the primary circulation through a second channel of the condensation-evaporation three-channel heat exchanger, enters the first channel of the water source heat pump condenser through the water source heat pump compressor, releases heat through heat exchange, returns to the condensation-evaporation three-channel heat exchanger through the water source heat pump expansion valve to continue absorbing heat, and is in a reciprocating mode to be a secondary heating cycle;
the heat released by the water source heat pump condenser is supplied by the energy supply water outlet of the energy supply water outlet pipeline, the energy supply backwater in the energy supply backwater pipeline absorbs the heat from the second channel of the water source heat pump condenser through the first circulating pump, and the heat is supplied to the energy utilization point through the energy storage water tank through the first valve, so that the heat is reciprocated;
during heating defrosting, heat in the energy storage water tank enters a third channel of the condensation-evaporation three-channel heat exchanger through the second circulating pump to provide heat for primary circulation defrosting, at the moment, the primary circulation reversely operates, a medium absorbs the heat in the condensation-evaporation three-channel heat exchanger, enters a communication port B of the air source heat pump four-way valve, exits from the communication port D through the four-way valve, enters the air source heat pump compressor, an outlet of the air source heat pump compressor is connected with the communication port C, exits from the communication port A through the four-way valve, enters the air source heat pump evaporator, releases heat at the air source heat pump evaporator to defrost, and returns to the condensation-evaporator three-channel heat exchanger through the air source heat pump expansion valve after the medium is cooled, so that the defrosting process is realized;
when the environment temperature is higher than the set temperature, the system runs in a single stage, heat generated by the first circulation loop is directly supplied to an energy utilization point, and when the system is defrosted, the energy storage water tank supplies defrosting energy to the first circulation loop, so that the defrosting process of the two-stage heating is consistent;
energy supply backwater in the energy supply backwater pipeline enters the energy storage water tank through the first circulating pump and the second channel of the water source heat pump condenser, absorbs heat from the energy storage water tank, and is supplied with energy through the energy supply outlet water of the energy supply water outlet pipeline through the first valve;
medium in the energy storage water tank enters a third channel of the condensation-evaporation three-channel heat exchanger through a second circulating pump, absorbs heat generated by the first circulating loop through heat exchange, and returns to the energy storage water tank;
during refrigeration, the system supplies cold energy to the energy utilization point, and energy supply backwater in the energy supply backwater pipeline releases heat from the energy storage water tank through the first circulating pump and the second channel of the water source heat pump condenser and supplies energy utilization point through the energy supply water outlet pipeline through the second valve;
medium in the energy storage water tank enters a third channel of the condensation-evaporation three-channel heat exchanger through a second circulating pump, and the third channel of the condensation-evaporation three-channel heat exchanger is connected with the energy storage water tank through a second pipeline to operate a circulating loop;
during refrigeration, a medium absorbs heat in the three-way heat exchanger of the condensation-evaporator, enters the communication port B of the four-way valve of the air source heat pump, passes through the four-way valve, and enters the air source heat pump compressor, the outlet of the air source heat pump compressor is connected with the communication port C, passes through the four-way valve, and exits from the communication port A, enters the air source heat pump evaporator, and releases heat in the air source heat pump evaporator, so that the air source heat pump evaporator reciprocates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810040087.3A CN108180668B (en) | 2018-01-16 | 2018-01-16 | Single-stage and double-stage heat pump heating and refrigerating system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810040087.3A CN108180668B (en) | 2018-01-16 | 2018-01-16 | Single-stage and double-stage heat pump heating and refrigerating system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108180668A CN108180668A (en) | 2018-06-19 |
| CN108180668B true CN108180668B (en) | 2023-05-23 |
Family
ID=62550684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810040087.3A Active CN108180668B (en) | 2018-01-16 | 2018-01-16 | Single-stage and double-stage heat pump heating and refrigerating system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108180668B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813005B (en) * | 2019-01-04 | 2023-09-22 | 北京四季通能源科技有限公司 | Double-stage heat pump system and control method thereof |
| CN111197874A (en) * | 2020-02-28 | 2020-05-26 | 克莱门特捷联制冷设备(上海)有限公司 | Cascade type air conditioner heat pump system and control method thereof |
| CN112377979B (en) * | 2020-11-06 | 2021-10-08 | 青岛海信日立空调系统有限公司 | Air source heat pump unit |
| CN115307325A (en) * | 2022-08-26 | 2022-11-08 | 浙江工业大学 | Heat-storage overlapping heat pump circulating system |
| CN115614802B (en) * | 2022-12-21 | 2023-03-10 | 河北博纳德能源科技有限公司 | Low-temperature heat pump waterway overlapping heat supply system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275792A (en) * | 2008-05-19 | 2008-10-01 | 南京理工大学 | Single / double stage mixed composite stacking heat pump air conditioner unit |
| CN201322469Y (en) * | 2008-11-21 | 2009-10-07 | 王全龄 | Tri-coupled air-source heat pump air conditioner |
| CN101614451A (en) * | 2009-06-23 | 2009-12-30 | 王言明 | Heat pump type air conditioning system and heat recovery system |
| CN104833087A (en) * | 2015-04-30 | 2015-08-12 | 南京理工大学 | Cascading middle and high-temperature air source heat pump hot water machine set |
| CN205690745U (en) * | 2016-05-24 | 2016-11-16 | 万家乐空气能科技有限公司 | A kind of circulating air energy heat pump |
| EP3184936A1 (en) * | 2015-12-23 | 2017-06-28 | EKOMATIC Spolka Cywilna | Ground source heat pump system with a cooling function |
-
2018
- 2018-01-16 CN CN201810040087.3A patent/CN108180668B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275792A (en) * | 2008-05-19 | 2008-10-01 | 南京理工大学 | Single / double stage mixed composite stacking heat pump air conditioner unit |
| CN201322469Y (en) * | 2008-11-21 | 2009-10-07 | 王全龄 | Tri-coupled air-source heat pump air conditioner |
| CN101614451A (en) * | 2009-06-23 | 2009-12-30 | 王言明 | Heat pump type air conditioning system and heat recovery system |
| CN104833087A (en) * | 2015-04-30 | 2015-08-12 | 南京理工大学 | Cascading middle and high-temperature air source heat pump hot water machine set |
| EP3184936A1 (en) * | 2015-12-23 | 2017-06-28 | EKOMATIC Spolka Cywilna | Ground source heat pump system with a cooling function |
| CN205690745U (en) * | 2016-05-24 | 2016-11-16 | 万家乐空气能科技有限公司 | A kind of circulating air energy heat pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108180668A (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108180668B (en) | Single-stage and double-stage heat pump heating and refrigerating system and control method | |
| CN109405102B (en) | Air Conditioning System | |
| US20190346189A1 (en) | Heat pump system | |
| CN110657597B (en) | Fluorine pump multi-connected refrigerating system and control method thereof | |
| CN108131765B (en) | Integral single-stage and double-stage heat pump system and control method thereof | |
| CN204438585U (en) | Air-conditioning system | |
| CN112013451B (en) | Solar photovoltaic photo-thermal coupling double-cold heat exchanger heat pump system and working method | |
| CN211526570U (en) | Outdoor unit and composite heat pump system | |
| CN103697614B (en) | Air conditioner heat pump system | |
| CN102788447B (en) | Heat pump air conditioning system | |
| CN109668362B (en) | Multi-storage-temperature refrigeration storage system utilizing pressure energy of natural gas pipe network and working method thereof | |
| CN210951940U (en) | Fluorine pump multi-connected refrigeration system | |
| CN103868281B (en) | A kind of single/double stage compresses switchable tri-generation system of ground-source heat pump | |
| CN208332737U (en) | Single double stage heat pump heating and refrigeration system | |
| KR20190027210A (en) | Multiple Heat Source Multi Heat Pump System with Air Heat Source Cooling Operation, Air Heat Source Heating Operation, Water Heat Source Cooling and Heating Simultaneous Operation, Water Heat Source Heating and Cooling Simultaneous Operation | |
| CN212109084U (en) | Air conditioning system with natural cooling function | |
| CN104061750A (en) | Method For Controlling Refrigerator | |
| KR20140089271A (en) | Two stage heat pump cooling and heating apparatus using mult-heat source | |
| CN209819920U (en) | Two-stage heat pump system | |
| CN201964611U (en) | Commercial ultra-low temperature heat pump water heater unit | |
| CN105202813A (en) | Air source heat pump unit for crude oil heating | |
| CN110953654A (en) | Outdoor unit and composite heat pump system | |
| KR20140112928A (en) | Two stage heat pump cooling and heating apparatus using air heat source | |
| CN101169295A (en) | Air source cold-hot energy machine set | |
| KR100500954B1 (en) | Ice thermal storage heat pump unit |
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 |