CN103868281B - A kind of single/double stage compresses switchable tri-generation system of ground-source heat pump - Google Patents

A kind of single/double stage compresses switchable tri-generation system of ground-source heat pump Download PDF

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CN103868281B
CN103868281B CN201410122848.1A CN201410122848A CN103868281B CN 103868281 B CN103868281 B CN 103868281B CN 201410122848 A CN201410122848 A CN 201410122848A CN 103868281 B CN103868281 B CN 103868281B
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heat exchange
temperature
unit
air
exchange coil
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CN103868281A (en
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蒋绿林
姜钦青
游庆生
王昌领
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Changzhou University
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Changzhou University
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Abstract

The present invention relates to a kind of single/double stage and compress switchable tri-generation system of ground-source heat pump, comprise ground source water unit, air-conditioning unit, hot water unit and heat exchange unit; Summer, air-conditioning unit forms the two-stage compression cycle of connecting with hot water unit, and air-conditioning unit provides saturated gaseous working medium for hot water unit, and hot water unit provides the working medium of the low temperature liquid after throttling for air-conditioning unit simultaneously, whole system obtains dual efficiency, reduces the heat entering soil simultaneously; In winter, hot water unit and air-conditioning unit form single stage compress in parallel and circulate, and ground source water unit is simultaneously for hot water unit and air-conditioning unit provide low-temperature heat source; Spring, autumn, hot water unit can also isolated operation hot water preparing.Hot water unit and air-conditioning unit are combined by this system, the energy utilization rate of whole system significantly promotes, decrease discharges heat in soil simultaneously, efficiently solve underground hot stack problem, make the operation that entirely source heat pump system can be efficient, energy-conservation, stable for a long time.

Description

A kind of single/double stage compresses switchable tri-generation system of ground-source heat pump
Technical field
The present invention relates to a kind of single/double stage and compress switchable tri-generation system of ground-source heat pump, by geothermal heat pump air-conditioner, be integrated for warm hot-water heating system, belong to the technical field of geothermal heat pump air-conditioner, hot water apparatus.
Background technology
At present, the most of earth-source hot-pump system of China is independent air-conditioning system, and summer is indoor refrigeration, and winter is indoor heating, and spring, autumn transition season earth-source hot-pump system are in idle state, make a low multiple use.The invention solves above problem, this system is hot water preparing while summer is indoor refrigeration, hot water preparing while being indoor heating winter, and spring, autumn transition season also can hot water preparings.
After commonly source heat pump system runs the several years, the heat entering due to system to soil/take out is uneven, and there will be hot stack phenomenon after the several years, operational effect can worse and worse, finally even can not normally be run, the area cold in winter and hot in summer particularly on the south the Changjiang river.The present invention solves above problem cleverly, guarantees that the heat that earth-source hot-pump system enters to soil/takes out tends to balance throughout the year, makes the operation that entirely source heat pump system energy is steady in a long-term, efficient, energy-conservation.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the problems of the prior art, a kind of earth-source hot-pump system that can realize trilogy supply is provided, realize indoor cooling in summer, Winter heat supply, the whole year provide domestic hot-water, and effectively can solve underground hot stack problem, switchable tri-generation system of ground-source heat pump can be compressed by single/double stage that is efficient, energy-conservation, stable operation for a long time.
The technical solution adopted for the present invention to solve the technical problems is: a kind of single/double stage compresses switchable tri-generation system of ground-source heat pump, it is characterized in that comprising:
Heat exchange unit, described heat exchange unit comprises multifunctional heat exchanger, the first heat exchange coil, the gentle liquid storage tank of the second heat exchange coil, described first heat exchange coil, it is inner that the gentle liquid storage tank of second heat exchange coil is placed in described multifunctional heat exchanger, and described gas-liquid storage tank is placed on the upper space of described multifunctional heat exchanger inside, described gas-liquid tank bottom is provided with a and e hole, top is respectively equipped with b, c, d hole, a hole is connected with described second heat exchange coil, the other end of described second heat exchange coil stretches out the outer wall of described multifunctional heat exchanger, b hole is connected with described first heat exchange coil, the other end of described first heat exchange coil stretches out the outer wall of described multifunctional heat exchanger, the outer wall of described multifunctional heat exchanger is stretched out respectively by copper pipe in c and e hole.
Ground source water unit, described ground source water unit comprises underground buried tube, water pump, second controller and the second temperature-sensing probe; Described underground buried tube outlet is communicated with described multifunctional heat exchanger top by water pump, described underground buried tube entrance is communicated with described multifunctional heat exchanger bottom, described second temperature-sensing probe is placed in attemperater, described second temperature-sensing probe is connected with described second controller by described insulated electric conductor, and described second controller is connected with described water pump by insulated electric conductor.
Air-conditioning unit, described air-conditioning unit comprises four-way change-over valve, the second compressor, coil pipe of air-conditioner blower, the second electric expansion valve, the second heat exchange coil, gas-liquid storage tank and three-way diverter valve, the c hole of described gas-liquid tank top is connected with wherein two interface end of described three-way diverter valve respectively with e hole, bottom, 3rd interface end of described three-way diverter valve is connected with one end of described four-way change-over valve, other three interface end of described four-way change-over valve respectively with the suction of described second compressor, exhaust end, described coil pipe of air-conditioner blower connects, the other end of described coil pipe of air-conditioner blower is connected with described second electric expansion valve, the other end of described second electric expansion valve is connected with described second heat exchange coil, the other end of described second heat exchange coil is connected with a hole of described gas-liquid tank bottom.
Hot water unit, described hot water unit comprises the first compressor, condenser, attemperater, the first electric expansion valve, the first heat exchange coil, gas-liquid storage tank, the first controller and the first temperature-sensing probe, the exhaust end of described first compressor is connected with described condenser, it is inner that described condenser is placed in described attemperater, the other end of described condenser is connected with described first electric expansion valve, the other end of described first electric expansion valve is connected with described first heat exchange coil, the other end of described first heat exchange coil is connected with the b hole of described gas-liquid tank top, the d hole of described gas-liquid tank top is connected with the suction end of described first compressor, described first temperature-sensing probe is placed in described attemperater, described first temperature-sensing probe is connected with described first controller by described insulated electric conductor, described first controller is connected with described first compressor by insulated electric conductor.
Further, described first controller controls the open and close of described first compressor according to the temperature signal of described first temperature-sensing probe; When in the attemperater of described hot water unit, water temperature is lower than preset temperature (60 DEG C), described first compressor normally works, and when in the attemperater of described hot water unit, water temperature is higher than preset temperature (60 DEG C), described first compressor quits work.
Further, described second controller, according to the temperature signal of described second temperature-sensing probe, controls the operation of described water pump; Described second controller is provided with " winter ", " summer ", " spring and autumn " three gears, and " winter " shelves are the high-power shelves of constant flow; " summer " shelves are temperature control variable-flow shelves, and when water temperature in attemperater is lower than preset temperature (60 DEG C), water pump small-power is run, when water temperature in attemperater is higher than preset temperature (60 DEG C), and the high-power operation of water pump; To be that constant flow is high-power open/stop shelves to " spring and autumn " shelves automatically, and when water temperature in attemperater is lower than preset temperature (60 DEG C), the high-power operation of water pump, when water temperature in attemperater is higher than preset temperature (60 DEG C), water pump is out of service.During winter operation, described second controller is transferred to " winter " shelves; During summer operation, described second controller is transferred to " summer " shelves; When spring, autumn transition season run, described second controller is transferred to " spring and autumn " shelves.
The invention has the beneficial effects as follows, the present invention is a kind of tri-generation system of ground-source heat pump that can realize single/double stage compression and switch, and can realize air conditioner refrigerating, heat supply, the whole year provide domestic water, the area cold in winter and hot in summer be particularly suitable on the south the Changjiang river uses; During summer air-conditioning refrigeration, the cycle fluid of air-conditioning unit evaporates absorbed heat in coil pipe of air-conditioner blower, a part is supplied to hot water unit for hot water preparing, another part enters underground through ground source water unit, and energy utilization rate reaches the highest, and system obtains dual efficiency, COP reaches maximum, and reduce and enter too much heat to underground, efficiently solve underground thermal buildup issue, make the operation that entirely source heat pump system can be efficient, energy-conservation, stable for a long time.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is a kind of schematic diagram that can realize the earth-source hot-pump system of trilogy supply of the present invention.
In figure: 1, underground buried tube; 2, water pump; 3, the first compressor; 4, condenser; 5, the first electric expansion valve; 6, attemperater; 7, multifunctional heat exchanger; 8, four-way change-over valve; 9, the second compressor; 10, coil pipe of air-conditioner blower; 11, the second electric expansion valve; 12, the first temperature-sensing probe; 13, the second temperature-sensing probe; 14, the second heat exchange coil; 15, the first heat exchange coil; 16, gas-liquid storage tank; 17, insulated electric conductor; 18, the first controller; 19, second controller; 20, three-way diverter valve.
Detailed description of the invention
Below in conjunction with specific embodiment, further the present invention is set forth, should be understood that and quote embodiment only for illustration of the present invention, and be not used in and limit the scope of the invention.
As shown in Figure 1, a kind of single/double stage compresses switchable tri-generation system of ground-source heat pump, comprising:
Heat exchange unit, heat exchange unit comprises the gentle liquid storage tank 16 of multifunctional heat exchanger 7, second heat exchange coil 14, first heat exchange coil 15, second heat exchange coil 14, the gentle liquid storage tank 16 of first heat exchange coil 15 is placed in the inside of multifunctional heat exchanger 7, and gas-liquid storage tank 16 is placed on the upper space of multifunctional heat exchanger 7 inside, a and e hole is provided with bottom gas-liquid storage tank 16, top is respectively equipped with b, c, d hole, a hole is connected with the second heat exchange coil 14, the other end of the second heat exchange coil 14 stretches out the outer wall of multifunctional heat exchanger 7, b hole is connected with the first heat exchange coil 15, the other end of the first heat exchange coil 15 stretches out the outer wall of multifunctional heat exchanger 7, the outer wall of multifunctional heat exchanger 7 is stretched out respectively by copper pipe in c and e hole.
Ground source water unit, ground source water unit comprises underground buried tube 1, water pump 2, second controller 19 and the second temperature-sensing probe 13; Underground buried tube 1 is exported and is communicated with by the top of water pump 2 with multifunctional heat exchanger 7, underground buried tube 1 entrance is communicated with the bottom of multifunctional heat exchanger 7, second temperature-sensing probe 13 is placed in attemperater 6, second temperature-sensing probe 13 is connected with second controller 19 by insulated electric conductor 17, and second controller 19 is connected with water pump 2 by insulated electric conductor 17.
Air-conditioning unit, air-conditioning unit comprises four-way change-over valve 8, second compressor 9, coil pipe of air-conditioner blower 10, second electric expansion valve 11, second heat exchange coil 14, gas-liquid storage tank 16 and three-way diverter valve 20; The c hole at gas-liquid storage tank 16 top is connected with I, III interface end of three-way diverter valve 20 respectively with e hole, bottom, II interface end of three-way diverter valve 20 is connected with one end of four-way change-over valve 8, other three interface end of four-way change-over valve 8 are connected with the suction of the second compressor 9, exhaust end, coil pipe of air-conditioner blower 10 respectively, the other end of coil pipe of air-conditioner blower 10 is connected with the second electric expansion valve 11, the other end of the second electric expansion valve 11 is connected with the second heat exchange coil 14, and the other end of the second heat exchange coil 14 is connected with a hole bottom gas-liquid storage tank 16.
Hot water unit, hot water unit comprises the first compressor 3, condenser 4, attemperater 6, first electric expansion valve 5, first heat exchange coil 15, gas-liquid storage tank 16, first controller 18 and the first temperature-sensing probe 12, the exhaust end of the first compressor 3 is connected with condenser 4, it is inner that condenser 4 is placed in attemperater 6, the other end of condenser 4 is connected with the first electric expansion valve 5, the other end of the first electric expansion valve 5 is connected with the first heat exchange coil 15, the other end of the first heat exchange coil 15 is connected with the b hole at gas-liquid storage tank 16 top, the d hole at gas-liquid storage tank 16 top is connected with the suction end of the first compressor 3, first temperature-sensing probe 12 is placed in attemperater 6, first temperature-sensing probe 12 is connected with the first controller 18 by insulated electric conductor 17, first controller 18 is connected with the first compressor 3 by insulated electric conductor 17 again.
Heat exchange unit is combined ground source water unit, air-conditioning unit and hot water unit and is carried out heat exchange, forms single/double stage and compresses switchable tri-generation system of ground-source heat pump.
In a kind of detailed description of the invention, first temperature-sensing probe 12 by insulated electric conductor 17 the temperature signal in attemperater 6 be transferred to the first controller 18, first controller 18 to receive temperature signal carry out logic analysis after send control instruction by insulated electric conductor 17 to the first compressor 3; When water temperature in attemperater 6 is lower than preset temperature (60 DEG C), the first compressor 3 normally works, and when water temperature in attemperater 6 is higher than preset temperature (60 DEG C), the first compressor 3 quits work.
Further, the second temperature-sensing probe 13 is transferred to second controller 19 by insulated electric conductor 17 the temperature signal in attemperater 6, and second controller 19 sends control instruction by insulated electric conductor 17 to water pump 2 after carrying out logic analysis to the temperature signal received; Second controller 19 is provided with " winter ", " summer ", " spring and autumn " three gears, and " winter " shelves are the high-power shelves of constant flow; " summer " shelves are temperature control variable-flow shelves, and when water temperature in attemperater 6 is lower than preset temperature (60 DEG C), water pump 2 small-power is run, when water temperature in attemperater 6 is higher than preset temperature (60 DEG C), and the high-power operation of water pump 2; To be that constant flow is high-power open/stop shelves to " spring and autumn " shelves automatically, and when water temperature in attemperater 6 is lower than preset temperature (60 DEG C), the high-power operation of water pump 2, when water temperature in attemperater 6 is higher than preset temperature (60 DEG C), water pump 2 is out of service.During winter operation, second controller 19 is transferred to " winter " shelves; During summer operation, second controller 19 is transferred to " summer " shelves; When spring, autumn transition season run, second controller 19 is transferred to " spring and autumn " shelves.
Detailed description of the invention comprises:
Summer using forestland, air conditioner refrigerating is domestic hot-water processed simultaneously, second controller 19 is transferred to " summer " shelves, when the water temperature in attemperater 6 is lower than preset temperature (60 DEG C), the first temperature-sensing probe 12 in attemperater 6 is transferred to the first controller 18 by insulated electric conductor 17 temperature signal, first controller 18 sends control instruction by insulated electric conductor 17 to the first compressor 3 after carrying out logic analysis to the temperature signal received: the first compressor 3 is opened, the second temperature-sensing probe 13 in attemperater 6 is transferred to second controller 19 by insulated electric conductor 17 temperature signal, second controller 19 sends control instruction by insulated electric conductor 17 to water pump 2 after carrying out logic analysis to the temperature signal received: water pump 2 small-power is run, now, the first compressor 3 is opened, and water pump 2 small-power is run, the hot water unit course of work: the gas working medium in gas-liquid storage tank 16 enters the first compressor 3 through d hole, top, be compressed into the superheated vapor of HTHP, the superheated vapor of HTHP enters condenser 4 and is condensed into liquid refrigerant, condensation heat is used for the water inside heating and thermal insulation water tank 6, liquid refrigerant becomes gas-liquid two-phase working medium after the first electric expansion valve 5 throttling, gas-liquid two-phase working medium enters the first heat exchange coil 15 and is condensed into supercooled liquid working medium by the water at low temperature in multifunctional heat exchanger 7, supercooled liquid working medium enters gas-liquid storage tank 16 through b hole, mix with working medium original in tank, hot water unit is periodic duty and so forth, the air-conditioning unit course of work: the saturated liquid refrigerant in gas-liquid storage tank 16 enters the second heat exchange coil 14 through a hole, bottom, saturated liquid refrigerant is condensed into supercooled liquid working medium by the water at low temperature in multifunctional heat exchanger 7, supercooled liquid working medium enters the second electric expansion valve 11, the gas-liquid two-phase working medium of low-temp low-pressure is become after throttling, the gas-liquid two-phase working medium of low-temp low-pressure enters coil pipe of air-conditioner blower 10 and absorbs the heat of room air and become gaseous working medium, gaseous working medium becomes all relatively high superheated vapor of temperature and pressure after the second compressor 9 compresses, superheated vapor enters three-way diverter valve 20(II → III through four-way change-over valve 8) to e hole, enter gas-liquid storage tank 16 again and carry out abundant heat exchange with the liquid refrigerant in tank, gas after heat exchange, liquid working medium all becomes saturation state, saturated liquid refrigerant in gas-liquid storage tank 16 enters the second heat exchange coil 14 through a hole, bottom, air-conditioning unit is circular flow and so forth, under this operational mode, this system is Two-stage Compression earth-source hot-pump system, the cycle fluid of air-conditioning unit evaporate in coil pipe of air-conditioner blower absorb the heat of room air, a part is supplied to hot water unit for hot water preparing, and another part enters underground by ground source water unit, now, system obtains dual efficiency, and COP reaches maximum, and effective minimizing enters too much heat to underground.When the water temperature in attemperater 6 is higher than preset temperature (60 DEG C), first controller 18 sends instruction according to the temperature signal of the first temperature-sensing probe 12 to the first compressor 3: the first compressor 3 is out of service, and second controller 19 sends instruction according to the temperature signal of the second temperature-sensing probe 13 to water pump 2: water pump 2 switches to high-power operation by small-power; Now, hot water unit is out of service, and air-conditioning unit continues normal work for indoor refrigeration.
Use in winter pattern, air-conditioning heat supply is water heating simultaneously, second controller 19 is transferred to " winter " shelves, and the four-way change-over valve 8 of air-conditioning unit changes direction, and three-way diverter valve 20 also changes direction (I → II), when the water temperature in attemperater 6 is lower than preset temperature (60 DEG C), first controller 18 sends instruction according to the temperature signal of the first temperature-sensing probe 12 to the first compressor 3: the first compressor 3 is opened, and second controller 19 sends instruction according to the temperature signal of the second temperature-sensing probe 13 to water pump 2: the high-power operation of water pump 2, now, the first compressor 3 is opened, the high-power operation of water pump 2, the hot water unit course of work: the gas working medium in gas-liquid storage tank 16 enters the first compressor 3 through d hole, top, be compressed into the superheated vapor of HTHP, the superheated vapor of HTHP enters condenser 4 and is condensed into liquid refrigerant, condensation heat is used for the water inside heating and thermal insulation water tank 6, liquid refrigerant becomes the gas-liquid two-phase working medium of low-temp low-pressure after the first electric expansion valve 5 throttling, the gas-liquid two-phase working medium of low-temp low-pressure enters after the first heat exchange coil 15 absorbs the heat of water in multifunctional heat exchanger 7 and becomes gaseous working medium, gaseous working medium enters gas-liquid storage tank 16 through b hole, mix with gas working medium in tank, hot water unit is periodic duty and so forth, the air-conditioning unit course of work: the gas working medium in gas-liquid storage tank 16 enters three-way diverter valve 20(I → II through c hole), the second compressor 9 is entered again through four-way change-over valve 8, be compressed into the superheated vapor of HTHP, the superheated vapor of HTHP enters coil pipe of air-conditioner blower 10 and is condensed into liquid refrigerant, condensation heat is used for indoor heating, liquid refrigerant becomes the gas-liquid two-phase working medium of low-temp low-pressure after the second electric expansion valve 11 throttling, the gas-liquid two-phase working medium of low-temp low-pressure enters after the second heat exchange coil 14 absorbs the heat of water in multifunctional heat exchanger 7 and becomes gaseous working medium, gas-liquid storage tank 16 is entered again through a hole, mix with working medium in gas-liquid storage tank 16, air-conditioning unit is periodic duty and so forth, now, hot water unit and air-conditioning unit are two single stage compress earth-source hot-pump systems in parallel, and the low-temperature heat source of hot water unit and air-conditioning unit is all the heat obtained from underground from ground source water unit.When the water temperature in attemperater 6 is higher than preset temperature (60 DEG C), first controller 18 sends instruction according to the temperature signal of the first temperature-sensing probe 12 to the first compressor 3: the first compressor 3 is out of service, now, hot water unit is out of service, and air-conditioning unit continues normal work for indoor heating.
Spring, autumn using forestland, only need hot water preparing; Second controller 19 is transferred to " spring and autumn " shelves, when the water temperature in attemperater 6 is lower than preset temperature (60 DEG C), first controller 18 sends instruction according to the temperature signal of the first temperature-sensing probe 12 to the first compressor 3: the first compressor 3 is opened, and second controller 19 sends instruction according to the temperature signal of the second temperature-sensing probe 13 to water pump 2: the high-power operation of water pump 2; Now, hot water unit normally works, and air-conditioning unit does not work, and the hot water unit course of work is substantially identical with the hot water unit course of work in above-mentioned winter; When the water temperature in attemperater 6 is higher than preset temperature (60 DEG C), first controller 18 sends instruction according to the temperature signal of the first temperature-sensing probe 12 to the first compressor 3: the first compressor 3 is out of service, and second controller 19 sends instruction according to the temperature signal of the second temperature-sensing probe 13 to water pump 2: water pump 2 is out of service.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to right.

Claims (3)

1. single/double stage compresses a switchable tri-generation system of ground-source heat pump, it is characterized in that comprising:
Heat exchange unit, described heat exchange unit comprises multifunctional heat exchanger (7), the first heat exchange coil (15), the second heat exchange coil (14) gentle liquid storage tank (16), first heat exchange coil (15), second heat exchange coil (14) gentle liquid storage tank (16) is placed in the inside of multifunctional heat exchanger (7), and gas-liquid storage tank (16) is placed on the inner upper space of multifunctional heat exchanger (7), gas-liquid storage tank (16) bottom is provided with a and e hole, top is respectively equipped with b, c, d hole, a hole is connected with the second heat exchange coil (14), the other end of the second heat exchange coil (14) stretches out the outer wall of multifunctional heat exchanger (7), b hole is connected with the first heat exchange coil (15), the other end of the first heat exchange coil (15) stretches out the outer wall of multifunctional heat exchanger (7), the outer wall of multifunctional heat exchanger (7) is stretched out respectively by copper pipe in c and e hole,
Ground source water unit, described ground source water unit comprises underground buried tube (1), water pump (2), second controller (19) and the second temperature-sensing probe (13); Underground buried tube (1) outlet is communicated with by the top of water pump (2) with multifunctional heat exchanger (7), underground buried tube (1) entrance is communicated with the bottom of multifunctional heat exchanger (7), second temperature-sensing probe (13) is placed in attemperater (6), second temperature-sensing probe (13) is connected with second controller (19) by insulated electric conductor (17), second controller (19) is connected with water pump (2) by insulated electric conductor (17)
Air-conditioning unit, described air-conditioning unit comprises four-way change-over valve (8), the second compressor (9), coil pipe of air-conditioner blower (10), the second electric expansion valve (11), the second heat exchange coil (14), gas-liquid storage tank (16) and three-way diverter valve (20), the c hole at gas-liquid storage tank (16) top and e hole, bottom respectively with I of three-way diverter valve (20), III interface end connects, II interface end of three-way diverter valve (20) is connected with one end of four-way change-over valve (8), other three interface end of four-way change-over valve (8) respectively with the suction of the second compressor (9), exhaust end, coil pipe of air-conditioner blower (10) connects, the other end of coil pipe of air-conditioner blower (10) is connected with the second electric expansion valve (11), the other end of the second electric expansion valve (11) is connected with the second heat exchange coil (14), the other end of the second heat exchange coil (14) is connected with a hole of gas-liquid storage tank (16) bottom,
Hot water unit, described hot water unit comprises the first compressor (3), condenser (4), attemperater (6), the first electric expansion valve (5), the first heat exchange coil (15), gas-liquid storage tank (16), the first controller (18) and the first temperature-sensing probe (12), the exhaust end of the first compressor (3) is connected with condenser (4), it is inner that condenser (4) is placed in attemperater (6), the other end of condenser (4) is connected with the first electric expansion valve (5), the other end of the first electric expansion valve (5) is connected with the first heat exchange coil (15), the other end of the first heat exchange coil (15) is connected with the b hole at gas-liquid storage tank (16) top, the d hole at gas-liquid storage tank (16) top is connected with the suction end of the first compressor (3), first temperature-sensing probe (12) is placed in attemperater (6), first temperature-sensing probe (12) is connected with the first controller (18) by insulated electric conductor (17), first controller (18) is connected with the first compressor (3) by insulated electric conductor (17) again.
2. a kind of single/double stage as claimed in claim 1 compresses switchable tri-generation system of ground-source heat pump, it is characterized in that: described second controller (19) controls the operation of described water pump (2) according to the temperature signal of described second temperature-sensing probe (13), described second controller (19) is provided with " winter ", " summer ", control " spring and autumn " three gear.
3. a kind of single/double stage as claimed in claim 1 compresses switchable tri-generation system of ground-source heat pump, it is characterized in that: described first controller (18) controls the operation of described first compressor (3) according to the temperature signal of described first temperature-sensing probe (12).
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CN107514830A (en) * 2016-06-18 2017-12-26 上海春至新能源科技有限公司 A kind of single multi-stage compression automatic conversion Multifunctional heat pump system
CN110425747B (en) * 2019-08-01 2021-04-09 广东志高暖通设备股份有限公司 Variable-frequency water pump control method suitable for variable-frequency heat pump water heater
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