CN104697081A - Soil source heat pump system with natural cooling function - Google Patents
Soil source heat pump system with natural cooling function Download PDFInfo
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- CN104697081A CN104697081A CN201310655190.6A CN201310655190A CN104697081A CN 104697081 A CN104697081 A CN 104697081A CN 201310655190 A CN201310655190 A CN 201310655190A CN 104697081 A CN104697081 A CN 104697081A
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- Prior art keywords
- heat pump
- valve
- source heat
- evaporimeter
- condenser
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0057—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground receiving heat-exchange fluid from a closed circuit in the ground
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
Abstract
The invention relates to a soil source heat pump system with a natural cooling function and belongs to the technical field of air conditioning. The soil source heat pump system provided by the invention comprises three parts, namely a water source heat pump unit with the natural cooling function, an underground buried pipe heat exchange component and an indoor air conditioning device, wherein the three parts are connected through a user-side pipeline, a ground edge-side pipeline, eight switching valves, a user-side circulating pump (2) and a ground edge-side circulating pump to form the soil source heat pump system. The system can realize three operation modes, namely mechanical heating, natural cooling and mechanical cooling by switching the opening states of valves on a refrigerant pipeline of a water system and the water source heat pump unit according to ground temperature condition and cooling and heating requirements of a building, solve the problem that the heat pump unit cannot be started when the ground temperature is relatively low at the beginning of a cooling season, and meanwhile, effectively reduce the whole-year operation energy consumption of the soil source heat pump system.
Description
Technical field
The invention belongs to air-conditioning technical field, particularly a kind of soil source heat pump system with nature cooling function.
Background technology
In prior art, soil source heat pump system, due to by across cold-storage in season, can improve the thermal source quality of heat pump well, and can realize the heating of user, air-conditioning and hot water supply requirement, and therefore each region of China obtains a large amount of application.Conventional soil source heat pump system, as shown in Figure 1.
Soil heat exchanger is the storage heater of winter cold summer grade, Xia Redong.Because China is vast in territory, the soil moisture of different regions is different, and different architectural object has different hot and cold part throttle characteristics, therefore the earth source heat pump of some region can cause ground temperature too low operation one for after warm season, supplying the cold season initial stage, the cooling water temperature after soil heat exchanger heat exchange is too low, causes source pump condensing pressure too low, normally can not start, and then the cooling needs of building can not be realized.
For solving the problem, the following three kinds of schemes of normal employing in Practical Project: (1) adds plate type heat exchanger between underground pipe side and user side, thus utilize underground to realize free cold supply compared with the low-temperature receiver of low temperature at the cooling initial stage, source pump of reruning when ground temperature temperature rises in the normal temperature range started; (2) at the other one group of bypass line in parallel of source pump condenser, make the water inlet of a part of cooling water bypass to condenser of outflow condenser, to improve the inflow temperature of condenser, thus ensure the normal operation of source pump; (3) reduce control valve opening to reduce to enter the water yield of condenser, to improve the condensation temperature of source pump, thus ensure the normal operation of source pump.
Above-mentioned each technical scheme Shortcomings all to some extent:
(1) although the first scheme can realize free cold supply at the refrigeration initial stage in season, and the starting problem of source pump when ground temperature is too low can be solved, but heat exchanger and the parts such as corresponding connecting line, autocontrol valve part of large heat transfer area need be increased, add the construction cost of earth-source hot-pump system undoubtedly;
(2) although second can solve the normal operation problem of earth source heat pump with the third scheme, source pump continuous service, relatively the first scheme, source pump energy consumption increases, and is unfavorable for the whole energy of soil source heat pump system.
Therefore, explore one and can realize free cold supply at the refrigeration initial stage in season, can reduce again the investment of soil source heat pump system and the technical scheme of whole year operation energy consumption reducing system is the problem that must solve at present, be also the key technical problem promoting soil source heat pump technical development.
Summary of the invention
For above-mentioned problems of the prior art, the object of this invention is to provide a kind of soil source heat pump system with nature cooling function.This system can according to ground temperature condition and building cooling, heat demand, by switching the valve opening state on the refrigerant line of water system and water source heat pump units, can realize machinery heat, naturally freeze, mechanical refrigeration three kinds of operational modes, solve well and supplying the cold season lower problem causing source pump to open of temperature incipiently, do not need to increase earth source heat pump auxiliary simultaneously, and greatly can reduce the whole year operation energy consumption of soil source heat pump system.
In order to reach foregoing invention object, technical scheme of the present invention realizes as follows:
With a soil source heat pump system for nature cooling function, comprise source pump, underground buried tube heat-exchanging component, indoor air conditioner three part.Described three parts connect into a soil source heat pump system by user's side ducts and geographical side ducts, eight switch valves, user side circulating pump and geographical side circulating pumps.Described source pump is made up of compressor, condenser, throttling arrangement, evaporimeter.Cold-producing medium circulates along the flow direction of compressor, condenser, throttling arrangement, evaporimeter, by the transfer of heat that enters in evaporimeter in cold water in the hot water of the flowing in condenser.Its design feature is:
Described source pump also comprises triple valve and by-passing valve.Three interfaces of described triple valve connect the air inlet pipe of the air intake duct of compressor, the blast pipe of compressor and condenser respectively, and described by-passing valve is connected in parallel on the two ends of throttling arrangement.During compressor operating, cold-producing medium is air-breathing from evaporimeter, through compressor, triple valve, condenser, throttling arrangement Returning evaporimeter, completes kind of refrigeration cycle.Thus produce cold water in evaporimeter, or hot water preparing within the condenser.When compressor is out of service, cold-producing medium is become refrigerant vapour by the warm water heating evaporation that indoor air conditioner returns in evaporimeter, enters condenser through triple valve.The low-temperature cold water that refrigerant vapour is returned by underground buried tube heat-exchanging component is within the condenser condensed into liquid, then turns back in evaporimeter through by-passing valve, completes Natural Circulation.Thus in evaporimeter, produce the higher cold water of temperature, sending in indoor air conditioner is indoor cooling.
In above-mentioned soil source heat pump system, described in include the source pump of triple valve and by-passing valve quantity can be one or more.Also can be that one or more comprises the source pump of triple valve and by-passing valve and the combination of one or more conventional ground source heat pump.
In above-mentioned soil source heat pump system, described triple valve is self-operated three-way valve, or electronic/electromagnetic type triple valve.
In above-mentioned soil source heat pump system, described triple valve is the assembly of two two-way valves.
In above-mentioned soil source heat pump system, described by-passing valve is self-operated type two-way valve, or electronic/electromagnetic type two-way valve.
In above-mentioned soil source heat pump system, described by-passing valve and throttling arrangement are overall valve members comprising bypass function and throttling function.
The technical scheme that the present invention proposes is owing to have employed above-mentioned structure, only in the soil source heat pump system of prior art, add triple valve and by-passing valve, namely effective Improvement and perfection has been carried out to the deficiency that prior art exists, there is energy-conservation, material-saving effect significantly, for the sound development promoting soil source heat pump technology, accelerate national energy-saving reduction of discharging paces and there is important social effect and economic worth.Be embodied in:
(1) at the refrigeration initial stage in season, utilize the natural cooling function of ground source heat pump, do not need to start source pump and just can extract cold in low temperature soil to building cooling, do not need to increase the equipment such as heat exchanger, autocontrol valve and pipeline thereof, building can be embodied as free low-temperature receiver is provided, there is energy-conservation, material-saving effect significantly;
(2) after ground temperature promotes, ground source heat pump is restarted to building cooling, avoid the source pump condensing pressure that source pump causes because cooling water temperature is too low too low, unit normally cannot start and occurs with the problem normally run, and ensure that the safety of soil source heat pump system, reliability service.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of prior art soil source heat pump system.
Fig. 2 is structure principle chart of the present invention.
Fig. 3 is source pump schematic diagram of the present invention.
Fig. 4 is heating period embodiment schematic diagram of the present invention.
Fig. 5 is the hot schematic diagram of heating period source pump machine of the present invention.
Fig. 6 is cooling initial stage schematic diagram of the present invention.
Fig. 7 is cooling initial stage source pump nature schematic diagram of refrigerating of the present invention.
Fig. 8 is that the present invention normally supplies cold period schematic diagram.
Fig. 9 is that the present invention normally supplies cold period source pump mechanical refrigeration schematic diagram.
In figure: 1-indoor air conditioner; 2-user side circulating pump; 3-user's side ducts; 4-source pump; 5-ground source circulating pump; 6-underground buried tube heat-exchanging component; 7-ground source pipeline; 8-condenser; 9-evaporimeter; 10-compressor; 11-triple valve; 12-throttling arrangement; 13-by-passing valve; 14-leaving condenser water mouth; 15-condenser water inlet; 16-evaporimeter water inlet; 17-evaporimeter delivery port; A1-switch valve one; A2-switch valve two; B1-switch valve three; B2-switch valve four; C1-switch valve five; C2-switch valve six; D1-switch valve seven; D2-switch valve eight.
Detailed description of the invention
See Fig. 2, a kind of soil source heat pump system with nature cooling function, this system comprises source pump 4, underground buried tube heat-exchanging component 6, indoor air conditioner 1 three part, by user's side ducts 3 and ground source pipeline 7, eight switch valves (A1, A2, B1, B2, C1, C2, D1, D2), user side circulating pump 2 and ground source circulating pump 5, above-mentioned three parts is connected into a soil source heat pump system.Source pump 4 is made up of compressor 10, condenser 8, throttling arrangement 12, evaporimeter 9, cold-producing medium circulates along the flow direction of compressor 10, condenser 8, throttling arrangement 12, evaporimeter 9, by the transfer of heat that enters in evaporimeter 9 in cold water in the hot water of the flowing in condenser 8.
See Fig. 3, source pump 4 also comprises triple valve 11 and by-passing valve 13, and three interfaces of described triple valve 11 connect the air inlet pipe of the air intake duct of compressor 10, the blast pipe of compressor 10 and condenser 8 respectively; By-passing valve 13 is connected in parallel on the two ends of throttling arrangement 12; When compressor 10 runs, cold-producing medium is air-breathing from evaporimeter 9, through compressor 10, triple valve 11, condenser 8, throttling arrangement 12 Returning evaporimeter 9, completes kind of refrigeration cycle, thus produce cold water in evaporimeter 9, or hot water preparing in condenser 8; When compressor 10 is out of service, cold-producing medium is become refrigerant vapour by the warm water heating evaporation that indoor air conditioner 1 returns in evaporimeter 9, condenser 8 is entered through triple valve 11, the low-temperature cold water that refrigerant vapour is returned by underground buried tube heat-exchanging component 6 in condenser 8 is condensed into liquid, turn back in evaporimeter 9 through by-passing valve 13 again, complete Natural Circulation, thus in evaporimeter 9, produce the higher cold water of temperature, sending in indoor air-conditioning system 1 is room cooling.
In the above-described embodiments, the quantity including the source pump 4 of triple valve 11 and by-passing valve 13 can be one or more; Also can be that one or more comprises the source pump 4 of triple valve 11 and by-passing valve 13 and the combination of one or more conventional ground source heat pump.
In the above-described embodiments, triple valve 11 is self-operated three-way valve, or electronic/electromagnetic type triple valve; Triple valve 11 is the assembly of two two-way valves; By-passing valve 13 is self-operated type two-way valve, or electronic/electromagnetic type two-way valve; By-passing valve 13 and throttling arrangement 12 can be arranged separately, also can be overall valve members comprising bypass function and throttling function.
The control flow of soil source heat pump system of the present invention is as follows:
One, heating period control flow:
See Fig. 4 and Fig. 5, Fig. 4 is at heating period soil source heat pump system schematic diagram, switch valve one A1, switch valve two A2, switch valve seven D1, switch valve eight D2 open, and switch valve three B1, switch valve four B2, switch valve five C1, switch valve six C2 close.Fig. 5 is the hot schematic diagram of heating period source pump machine 4 machine, and the by-passing valve 13 in described source pump 4 cuts out, and the path that triple valve 11 connects compressor 10 blast pipe and condenser 8 air inlet pipe is opened; When not needing heating, source pump 4, user side circulating pump 2 and ground source circulating pump 5 are out of service; When needs heat, open source pump 4, start user side circulating pump 2 and ground source circulating pump 5, source pump 4 by evaporimeter 9 heat-obtaining from underground buried tube heat-exchanging component 6, and utilizes kind of refrigeration cycle to heat the hot water flow through in condenser 8, sends into indoor by indoor air conditioner 1.
Two, cooling initial stage control flow:
See Fig. 6 and Fig. 7, Fig. 6 is at cooling initial soil source heat pump system schematic diagram, switch valve one A1, switch valve two A2, switch valve seven D1, switch valve eight D2 close, and switch valve three B1, switch valve four B2, switch valve five C1, switch valve six C2 open.Fig. 7 is the natural schematic diagram of refrigerating of cooling initial stage source pump 4, and the by-passing valve 13 in described source pump 4 is opened, and the path that triple valve 11 connects evaporimeter 9 escape pipe and condenser 8 air inlet pipe is opened; When not needing cooling, source pump 4, user side circulating pump 2 and ground source circulating pump 5 are out of service; When needs cooling, open source pump 4, start user side circulating pump 2 and ground source circulating pump 5, source pump 4 to heat extraction in underground buried tube heat-exchanging component 6, and utilizes natural circulation cooling to flow through cold water in evaporimeter 9 by condenser 8, sends into indoor by indoor air conditioner 1.
Three, normal for cold period control flow:
See Fig. 8 and Fig. 9, Fig. 8 is for cold period soil source heat pump system schematic diagram normal, switch valve one A1, switch valve two A2, switch valve seven D1, switch valve eight D2 close, and switch valve three B1, switch valve four B2, switch valve five C1, switch valve six C2 open.Fig. 9 normally supplies cold period source pump 4 mechanical refrigeration schematic diagram, and the by-passing valve 13 in described source pump 4 cuts out, and the path that triple valve 11 connects compressor 10 blast pipe and condenser 8 air inlet pipe is opened; When not needing cooling, source pump 4, user side circulating pump 2 and ground source circulating pump 5 are out of service; When needs cooling, open source pump 4, start user side circulating pump 2 and ground source circulating pump 5, source pump 4 passes through condenser 8 to heat extraction in underground buried tube heat-exchanging component 6, and utilizes the cold water in kind of refrigeration cycle cool stream evaporator 9, sends into indoor by indoor air conditioner 1.
In the embodiment of the invention described above, for " soil source heat pump system " of the prior art shown in Fig. 1, carry out effective Improvement and perfection, at the refrigeration initial stage in season, utilize the natural cooling function of ground source heat pump, do not need to start source pump and just can extract cold in low temperature soil to building cooling, do not need the equipment such as increase heat exchanger, autocontrol valve and pipeline thereof, building can be embodied as free low-temperature receiver is provided, there is energy-conservation, material-saving effect significantly; Ground source heat pump is restarted to building cooling after ground temperature promotes, avoid the source pump condensing pressure that source pump causes because cooling water temperature is too low too low, unit normally cannot start and occurs with the problem normally run, and ensure that the safety of soil source heat pump system, reliability service.
Claims (6)
1. the soil source heat pump system with nature cooling function, comprise source pump (4), underground buried tube heat-exchanging component (6), indoor air conditioner (1) three part, described three parts connect into a soil source heat pump system by user's side ducts (3) and geographical side ducts (7), eight switch valves (A1, A2, B1, B2, C1, C2, D1, D2), user side circulating pump (2) and geographical sides circulating pump (5); Described source pump (4) is made up of compressor (10), condenser (8), throttling arrangement (12), evaporimeter (9), cold-producing medium circulates along the flow direction of compressor (10), condenser (8), throttling arrangement (12), evaporimeter (9), transfer of heat in evaporimeter (9) in cold water will be entered in the hot water of the flowing in condenser (8), it is characterized in that:
Described source pump (4) also comprises triple valve (11) and by-passing valve (13), and three interfaces of described triple valve (11) connect the air intake duct of compressor (10), the blast pipe of compressor (10) and the air inlet pipe of condenser (8) respectively, described by-passing valve (13) is connected in parallel on the two ends of throttling arrangement (12), when compressor (10) runs, cold-producing medium is air-breathing from evaporimeter (9), through compressor (10), triple valve (11), condenser (8), throttling arrangement (12) Returning evaporimeter (9), complete kind of refrigeration cycle, thus produce cold water in evaporimeter (9), or at the middle hot water preparing of condenser (8), when compressor (10) is out of service, cold-producing medium is become refrigerant vapour by the warm water heating evaporation that indoor air conditioner (1) returns in evaporimeter (9), condenser (8) is entered through triple valve (11), the low-temperature cold water that refrigerant vapour is returned by underground buried tube heat-exchanging component (6) in condenser (8) is condensed into liquid, turn back in evaporimeter (9) through by-passing valve (13) again, complete Natural Circulation, thus the higher cold water of temperature is produced in evaporimeter (9), sending in indoor air conditioner (1) is indoor cooling.
2. a kind of soil source heat pump system with nature cooling function according to claim 1, is characterized in that: described in include the source pump (4) of triple valve (11) and by-passing valve (13) quantity can be one or more; Also can be that one or more comprises the source pump (4) of triple valve (11) and by-passing valve (13) and the combination of one or more conventional ground source heat pump.
3. a kind of soil source heat pump system with nature cooling function according to claim 1 and 2, is characterized in that: described triple valve (11) is self-operated three-way valve, or electronic/electromagnetic type triple valve.
4. a kind of soil source heat pump system with nature cooling function according to claim 3, is characterized in that: described triple valve (11) is the assembly of two two-way valves.
5. a kind of soil source heat pump system with nature cooling function according to claim 4, is characterized in that: described by-passing valve (13) is self-operated type two-way valve, or electronic/electromagnetic type two-way valve.
6. a kind of soil source heat pump system with nature cooling function according to claim 5, is characterized in that: described by-passing valve (13) and throttling arrangement (12) are overall valve members comprising bypass function and throttling function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655190.6A CN104697081A (en) | 2013-12-09 | 2013-12-09 | Soil source heat pump system with natural cooling function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310655190.6A CN104697081A (en) | 2013-12-09 | 2013-12-09 | Soil source heat pump system with natural cooling function |
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| CN104697081A true CN104697081A (en) | 2015-06-10 |
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| CN201310655190.6A Pending CN104697081A (en) | 2013-12-09 | 2013-12-09 | Soil source heat pump system with natural cooling function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524846A (en) * | 2020-12-09 | 2021-03-19 | 中国煤炭地质总局水文地质局 | Ultralow-consumption ground source heat pump refrigerating and heating system |
| CN115218305A (en) * | 2021-09-23 | 2022-10-21 | 巴法禄(上海)空调系统有限公司 | Efficient energy-saving ground source heat pump air conditioning system |
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| CN204084685U (en) * | 2013-12-09 | 2015-01-07 | 北京紫荆信达节能科技有限公司 | With the soil source heat pump system of nature cooling function |
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| CN112524846A (en) * | 2020-12-09 | 2021-03-19 | 中国煤炭地质总局水文地质局 | Ultralow-consumption ground source heat pump refrigerating and heating system |
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