CN117570504B - Ground source heat pump unit for building heating - Google Patents
Ground source heat pump unit for building heating Download PDFInfo
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- CN117570504B CN117570504B CN202410064466.1A CN202410064466A CN117570504B CN 117570504 B CN117570504 B CN 117570504B CN 202410064466 A CN202410064466 A CN 202410064466A CN 117570504 B CN117570504 B CN 117570504B
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- water
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- heat exchange
- heat
- supplementing
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 173
- 230000001502 supplementing effect Effects 0.000 claims abstract description 43
- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 72
- 238000007789 sealing Methods 0.000 claims description 39
- 238000004321 preservation Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000010992 reflux Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 10
- 238000012546 transfer Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 238000005286 illumination Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 238000003306 harvesting Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
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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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/11—Geothermal energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/14—Solar energy
Abstract
The invention is suitable for the technical field of ground source heat pumps, and provides a ground source heat pump unit for building heating, which comprises a heat exchange system, an energy collection system and a tail end, wherein the energy collection system is connected with a geothermal supplementing system, the geothermal supplementing system is arranged in parallel with the heat exchange system, the output end of the thermal exchange system is connected with a heating device of a hot water system, the heating device of the hot water system is arranged in parallel with the tail end, the output end of the hot water system is connected with the tail end, the hot water system is arranged in parallel with the heat exchange system, a plurality of buried pipes of the energy collection system are provided with buried pipe assemblies.
Description
Technical Field
The invention relates to the technical field of ground source heat pumps, in particular to a ground source heat pump unit for building heating.
Background
The ground source heat pump utilizes the cold-heat exchange between water and ground energy (groundwater, soil or surface water) to serve as the cold-heat source of the ground source heat pump, and heat in the ground energy is taken out in winter to be supplied for indoor heating, and the ground energy is a heat source at the moment; in summer, indoor heat is extracted and released into underground water, soil or surface water, and the ground energy is a cold source. The cold load and the heat load of each area are generally unbalanced, and the heat and the cold quantity transmitted to the soil are unbalanced, so that the ground temperature can be increased or reduced when the unit is used throughout the year, the using effect of the unit is affected, the environment is damaged, and the heat balance of the soil becomes an important requirement for the design of the ground source heat pump unit.
At present, the ground source heat pump unit on the market takes the year as an operation period, and the refrigerating heat exchange amount and the heating heat exchange amount are respectively calculated by acquiring parameters in the current period operation process of the unit, so that the comprehensive soil heat unbalance rate of soil around a buried pipe is determined, the unit is controlled to intermittently or frequency-variable operate in the next operation period according to the comprehensive soil heat unbalance rate, the heat exchange amount is balanced, the operation performance of the whole unit is improved, but the heat load is far greater than the cold load in northern areas, so that the heat drawn by the unit from the soil is far greater than the input heat, the requirement of balancing the soil heat is difficult to be achieved only by adjusting the operation time or frequency of the unit in winter, and the heating effect of the unit is reduced;
meanwhile, the pit is required to be excavated in advance when the pipe is buried, after the buried pipe is placed in the pit, raw soil or blended heat conducting filler is backfilled in the pit, and the uniformity of the original soil thermal property is easily damaged when the operation is complicated, so that the heat balance performance of the soil is influenced, and the heating effect of a unit is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a ground source heat pump unit for building heating, which can achieve both heat balance and heating effect.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a building heating is with ground source heat pump unit, includes heat exchange system, heat exchange system's input and output are connected with energy acquisition system and terminal respectively, be connected with the benefit geotherm system on the energy acquisition system, benefit geotherm system and heat exchange system parallel arrangement, when energy acquisition system inserts benefit geotherm system, carry out the heat to soil through benefit geotherm system, heat exchange system's output is connected with hot water system, hot water system is connected with the terminal, energy acquisition system, heat exchange system, hot water system, benefit geotherm system and terminal are connected with the controller jointly electrically, the controller is connected with time relay electrically, all be provided with buried pipe subassembly on the several ground buried pipes of energy acquisition system;
the whole operation of the unit during heating is divided into different working conditions, the communication and the start and stop of each system under the different working conditions are different, and the controller comprehensively controls the operation of the different working conditions according to the feedback information of each system so as to ensure that the geothermal balance is promoted under the premise of not influencing the heating effect;
the drilling and the burying are synchronously carried out, the soil discharged by the drilling is discharged upwards and backfilled between the buried pipes, and the soil properties of each depth are basically kept unchanged, so that the thermal balance of the soil is maintained.
The invention is further provided with: the buried pipe assembly comprises an upper sealing cover and a lower sealing cover, wherein the U-shaped part of the buried pipe is buried in the lower sealing cover, and heat transfer filler is filled between the buried pipe and the lower sealing cover; the heat transfer filler is matched with the soil property of the preset depth layer of the lower sealing cover, so that the uniformity of the soil property is prevented from being damaged, and the smooth proceeding of heat exchange is ensured;
the upper sealing cover and the lower sealing cover are jointly connected with two transmission shafts in a rotating mode, the two transmission shafts are respectively arranged on two sides of a buried pipe, the bottom ends of the transmission shafts extend out of the lower sealing cover and are connected with a drill bit, the two drill bits are arranged in an intersecting mode, the drill bit is conical, the lower sealing cover is attached to the conical bottom end of the drill bit, the bottom end of the lower sealing cover is inwards contracted to a size from the outer edge to the center and is smaller than the size from the outer edge to the center, the size from the outer edge of the bottom end of the drill bit, a gear set is arranged in the upper sealing cover, two output ends of the gear set are respectively connected with the two transmission shafts, the rotation directions of the two transmission shafts are opposite, and the input end of the gear set extends out of the upper sealing cover upwards and can be connected with an external power element;
when burying the buried pipe, be connected with the input of gear train and external power component, thereby drive two drill bits and rotate along opposite direction, the soil of device center department is pushed all around to two drill bits that intersect and set up, thereby form the hole that holds the lower closing cap and pass through, soil is pushed by the drill bit and upwards moves along the lateral wall of lower closing cap, finally backfill to lower closing cap top, and transmission shaft and the buried pipe of lower closing cap top all set up along vertical direction, very easily continue to move down through the soil that is backfilled, thereby realize burying the buried pipe, simultaneously the soil of different degree of depth of subsurface only upwards moves less height, soil property is unanimous with surrounding environment maintenance basically, be favorable to maintaining soil thermal balance, thereby guarantee heating efficiency.
The invention is further provided with: the energy collection system comprises a first water separator, a bus of the first water separator is communicated with an input water return port of the heat exchange system, a plurality of branching lines of the first water separator are all communicated with a buried pipe, a plurality of branching lines of the buried pipe are communicated with an input water inlet of the heat exchange system after being converged, and a water supplementing device and a first blow-down valve are communicated on a bus pipeline of the energy collection system.
In a preferred embodiment, after the buried pipes are converged, the buried pipes are communicated with the input end of the geothermal supplementing system, and the output end of the geothermal supplementing system is communicated with the bus of the first water separator; the energy collection system supplements soil heat when communicating with the geothermal supplementing system, and absorbs heat in the soil to heat the room when communicating with the heat exchange system; in this embodiment, the geothermal heat supplementing system and the heat exchanging system are connected in parallel to the energy collecting system, and when the energy collecting system is connected to the geothermal heat supplementing system, the indoor heating needs to be performed by matching with the hot water system as a supplementary heat source, so that the heat balance and the heating effect are both considered.
The invention is further provided with: the geothermal energy supplementing system comprises a solar heat collecting plate, a thermal energy supplementing circulating pump and an electromagnetic valve are arranged between a water inlet of the solar heat collecting plate and a buried pipe, a water outlet of the solar heat collecting plate is connected with a check valve III, a water outlet side of the check valve III is an output end of the geothermal energy supplementing system, and a light control sensor is arranged on the geothermal energy supplementing system; the light information is collected by the light control sensor and transmitted to the controller, and the start and stop of the geothermal supplementing system are controlled by matching time and temperature information of each system.
The invention is further provided with: the heat exchange system comprises a condenser and an evaporator, wherein one end of the external circulation of the condenser and the evaporator is respectively communicated with two ports of a first supply three-way valve and two ports of a second supply three-way valve, the other port of the first supply three-way valve is communicated with a water outlet of a collecting and circulating pump, a water inlet of the collecting and circulating pump is an input water inlet of the heat exchange system, the other port of the second supply three-way valve is communicated with a first tail end circulating pump, a water outlet end of the first tail end circulating pump is an output water outlet of the heat exchange system, the other ends of the condenser and the external circulation of the evaporator are respectively communicated with two ports of a first reflux three-way valve and two ports of a second reflux three-way valve, the other port of the first reflux three-way valve is communicated with a second check valve, the water outlet side of the second check valve is an input water return port of the heat exchange system, and the other end of the second reflux three-way valve is an output water return port of the heat exchange system; the external circulation path of the heat exchange system can be switched through the two groups of the three-way supply valves and the corresponding three-way return valves, so that the switching of different modes of refrigeration and heating is realized.
The invention is further provided with: the internal circulation of the condenser is correspondingly communicated with the internal circulation of the evaporator, and a compressor and an expansion valve are respectively arranged on two sections of connecting pipelines of the internal circulation of the condenser and the internal circulation of the evaporator.
The invention is further provided with: the water heating system comprises a heat preservation water tank, a water outlet at the output end of the heat exchange system is communicated with a water separator II, a branching line of the water separator II is respectively communicated with the tail end and a heating device of the heat preservation water tank, a water outlet end of the heating device of the heat preservation water tank is provided with a check valve I and is communicated with a water outlet end of the tail end, and the heat preservation water tank is provided with a water supplementing valve, a blow-down valve II and a thermometer internally installed; the water separator II is controlled to control the on-off of the hot water system and the tail end and the heat exchange system.
The invention has the advantages that:
1. the U-shaped end of the buried pipe is packaged in the lower sealing cover, the lower sealing cover is of a structure with a small bottom and a big top, two drill bits are arranged below the lower sealing cover in a staggered mode, when the power element is communicated, the two drill bits continuously push soil below the lower sealing cover to the periphery to enable the soil below the lower sealing cover to be extruded to backfill upwards along the side wall of the lower sealing cover, the transmission shaft above the lower sealing cover and the buried pipe are arranged in the vertical direction and can move downwards easily through the backfilled soil, so that the buried pipe is buried, the soil at different depths below the ground only moves to a small height, the soil property at the buried pipe is basically consistent with the surrounding environment, and therefore the stability of heat exchange rate can be ensured, and the thermal balance of the soil can be maintained;
2. the tail end of the heat-insulating water tank is connected with a water heating system in parallel, the water heating system is connected with a heat exchange system at night in a valley electricity period and used for heating stored water in the heat-insulating water tank, the water heating system is connected with the tail end through a tail end circulating pump II, heat can be selected from the water heating system for heating during daytime, the heating effect of the energy collecting system when the energy collecting system stops is ensured, the energy collecting system is used for intermittently heating from soil, the self heat transfer time is provided for a buried soil layer, the capability of maintaining the heat balance of soil is improved, the efficiency of the energy collecting system during working is improved, and the heating effect is ensured;
3. the heat exchange system and the geothermal supplementing system are arranged on the energy collection system in parallel, when the hot water system is selected for heating in daytime, the energy collection system is switched to be communicated with the geothermal supplementing system, and the geothermal supplementing system realizes the supplement of soil heat by heating circulating water in the buried pipe, so that the heat balance of soil is promoted, and meanwhile, the heating effect of a unit is ensured.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a heat exchange system according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of an energy harvesting system according to a first embodiment of the present disclosure;
FIG. 4 is a schematic view of a pipe laying assembly according to a first embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 7 is a schematic diagram of a terminal structure according to a first embodiment of the present invention;
FIG. 8 is a flow chart of the heating principle of the present invention;
in the figure: 1. a controller; 2. an energy harvesting system; 21. a first water separator; 22. a buried pipe; 23. a water replenishing device; 24. a blow-down valve I; 3. a heat exchange system; 31. collecting a circulating pump; 321. supplying a first three-way valve; 322. supplying a second three-way valve; 33. a condenser; 34. a compressor; 35. an evaporator; 36. an expansion valve; 371. a reflux three-way valve I; 372. reflux three-way valve II; 38. a first end circulating pump; 39. a second check valve; 4. a hot water system; 5. a geothermal heat supplementing system; 51. a solar heat collecting plate; 52. a heat supplementing circulating pump; 53. an electromagnetic valve; 55. a third check valve; 6. a terminal end; 61. a second water separator; 7. a pipe burying assembly; 71. an upper cover; 72. a drill bit; 721. a transmission shaft; 73. a lower cover; 731. a top plate; 74. a heat transfer filler; 75. a gear set; 751. an input shaft.
Detailed Description
It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1-8, the present invention provides the following technical solutions:
the ground source heat pump unit for building heating comprises a heat exchange system 3, wherein an input end and an output end of the heat exchange system 3 are respectively connected with an energy collection system 2 and a tail end 6, the energy collection system 2 is connected with a geothermal supplementing system 5, the geothermal supplementing system 5 is arranged in parallel with the heat exchange system 3, an output end of the heat exchange system 3 is connected with a heating device of a hot water system 4, the heating device of the hot water system 4 is arranged in parallel with the tail end 6, an output end of the hot water system 4 is connected with the tail end 6, the hot water system 4 is arranged in parallel with the heat exchange system 3, the energy collection system 2, the heat exchange system 3, the hot water system 4, the geothermal supplementing system 5 and the tail end 6 are electrically connected with a controller 1 together, the controller 1 is electrically connected with a time relay, and a plurality of buried pipes 22 of the energy collection system 2 are provided with buried pipe assemblies 7;
the controller 1 judges that the hot water system 4 is connected in the valley electricity period, and heats the stored water in the hot water system 4 to store heat while heating;
under the condition of illumination in daytime, the hot water system 4 replaces the heat exchange system 3 to supply heat to the tail end 6, at the moment, the heat exchange system 3 stops working, the energy collection system 2 is connected into the geothermal supplementing system 5, and the geothermal supplementing system 5 supplements heat to soil so as to maintain the heat balance of the soil and meet the indoor heating requirement;
the pipe burying assembly 7 can realize synchronous drilling and pipe burying, and automatically backfill the soil discharged from the drilling between the upper ground pipes, so that the soil properties of all depths are basically unchanged, the stability of the heat exchange rate is ensured, and the heat balance of the soil is maintained.
The buried pipe assembly 7 comprises an upper sealing cover 71 and a lower sealing cover 73, wherein a U-shaped part of the buried pipe 22 is buried in the lower sealing cover 73, a heat transfer filler 74 is filled between the buried pipe 22 and the lower sealing cover 73, the heat transfer filler 74 is matched with the soil property of a preset depth, so that the stability of heat exchange efficiency is ensured, and a top plate 731 is covered on the lower sealing cover 73;
the upper sealing cover 71 and the lower sealing cover 73 are connected with two transmission shafts 721 in a co-rotation mode, the two transmission shafts 721 are respectively arranged on two sides of the buried pipe 22, the bottom ends of the transmission shafts 721 extend out of the lower sealing cover 73 and are connected with a drill bit 72, the two drill bits 72 are arranged in an intersecting mode, the drill bit 72 is conical, the lower sealing cover 73 is attached to the conical bottom end of the drill bit 72, the bottom end of the lower sealing cover 73 is contracted inwards to a size from the outer edge to the center, the size from the outer edge to the center of the bottom end of the drill bit 72 is smaller than the size from the outer edge to the center of the bottom end of the drill bit 72, a gear set 75 is arranged in the upper sealing cover 71, two output ends of the gear set 75 are respectively connected with the two transmission shafts 721, the rotation directions of the two transmission shafts 721 are opposite, and an input end 751 of the gear set 75 extends upwards out of the upper sealing cover 71 and can be connected with an external power element;
when the buried pipe 22 is buried, the input end 751 is connected with an external power element, so that the two drill bits 72 are driven to rotate in opposite directions, the two drill bits 72 continuously push the soil to the periphery, the soil is extruded and then moves upwards along the side wall of the lower sealing cover 73, so that the soil is backfilled above the lower sealing cover 73, the transmission shaft 721 above the lower sealing cover 73 and the buried pipe 22 are arranged in the vertical direction, the backfilled soil can be easily moved downwards continuously, the buried pipe 22 is realized, the soil with different depths below the ground only moves to a small height, the soil property is basically consistent with the surrounding environment, the stability of the heat exchange rate can be ensured, and the thermal balance of the soil is maintained, and the heating efficiency is ensured.
The energy collection system 2 comprises a first water separator 21, wherein a bus of the first water separator 21 is communicated with a water outlet at the input end of the heat exchange system 3, a plurality of branching lines of the first water separator 21 are respectively communicated with a group of buried pipes 22, all the buried pipes 22 are communicated with a water inlet at the input end of the heat exchange system 3 after being combined, circulating water subjected to heat exchange flows out of the heat exchange system 3 and is shunted into each group of buried pipes 22 through the first water separator 21, heat transfer is carried out between the buried pipes 22 and soil, energy collection is completed by the circulating water subjected to heat exchange with the soil, and the circulating water flows into the heat exchange system 3 again after being combined; the bus pipeline of the energy collection system 2 is communicated with a water supplementing device 23 and a blow-down valve I24.
All the buried pipes 22 are converged and then are communicated with the input end of the geothermal compensating system 5, and the output end of the geothermal compensating system 5 is communicated with the bus of the first water separator 21;
the geothermal compensating system 5 comprises a solar heat collecting plate 51, a thermal compensating circulating pump 52 and an electromagnetic valve 53 are arranged between a water inlet of the solar heat collecting plate 51 and the buried pipe 22, a water outlet of the solar heat collecting plate 51 is connected with a third check valve 55, the water outlet side of the third check valve 55 is the output end of the geothermal compensating system 5, and a light-operated sensor is arranged on the geothermal compensating system 5;
the light control sensor provides illumination information for the controller 1, and is switched to the geothermal compensating system 5 when the illumination is good in daytime, the thermal compensating circulating pump 52 extracts circulating water from the converging pipes of the buried pipes 22, the circulating water is heated by the solar heat collecting plate 51 and then is shunted into each buried pipe 22 by the water separator I21, and heat is stored in soil, so that the thermal compensating of the soil is realized, the heat balance is maintained, and meanwhile, the heat exchange efficiency is improved.
The heat exchange system 3 comprises a condenser 33 and an evaporator 35, wherein one end of the external circulation of the condenser 33 and the evaporator 35 is respectively communicated with two ports of a first supply three-way valve 321 and two ports of a second supply three-way valve 322, the other port of the first supply three-way valve 321 is communicated with a water outlet of a collecting and circulating pump 31, a water inlet of the collecting and circulating pump 31 is an input end water inlet of the heat exchange system 3, the other port of the second supply three-way valve 322 is communicated with a first end circulating pump 38, and a water outlet end of the first end circulating pump 38 is a water outlet of an output end of the heat exchange system 3 and provides energy sources for the tail end 6;
the other end of the external circulation of the condenser 33 and the evaporator 35 is respectively communicated with two ports of a first reflux three-way valve 371 and two ports of a second reflux three-way valve 372, the other port of the first reflux three-way valve 371 is communicated with a second check valve 39, the water outlet side of the second check valve 39 is an input water return port of the heat exchange system 3, return water is prevented from flowing back into the heat exchange system 3 when the heat exchange system 5 is switched to, and the other end of the second reflux three-way valve 372 is an output water return port of the heat exchange system 3;
the inner circulation of the condenser 33 is correspondingly communicated with the inner circulation of the evaporator 35, and a compressor 34 and an expansion valve 36 are respectively arranged on two sections of connecting pipelines of the inner circulation of the condenser 33 and the inner circulation of the evaporator 35;
under refrigeration working conditions, the first supply three-way valve 321 and the first reflux three-way valve 371 are both communicated with the condenser 33, the second supply three-way valve 322 and the second reflux three-way valve 372 are both communicated with the evaporator 35, the collecting and circulating pump 31 conveys cold circulating water in the energy collecting system 2 into the condenser 33, circulating water circulating in the condenser 33 is liquefied in the condenser 33 and then pressurized by the compressor 34 and flows into the evaporator 35 for vaporization, so that circulating water circulating outside the evaporator 35 is cooled, and refrigeration is realized through the tail end 6;
under heating conditions, the first supply three-way valve 321 and the first reflux three-way valve 371 are both communicated with the evaporator 35, the second supply three-way valve 322 and the second reflux three-way valve 372 are both communicated with the condenser 33, the collecting and circulating pump 31 conveys cold circulating water in the energy collecting system 2 into the evaporator 35, circulating water circulating in the evaporator 35 is vaporized in the evaporator 35 and then pressurized by the compressor 34, and then flows into the condenser 33 for liquefaction, so that circulating water circulating outside the condenser 33 is heated, and heating is realized through the tail end 6.
The hot water system 4 comprises a heat preservation water tank, a water separator II 61 is communicated with a water outlet of an output end of the heat exchange system 3, a branching line of the water separator II 61 is respectively communicated with the tail end 6 and a heating device of the heat preservation water tank, a water outlet end of the heating device of the heat preservation water tank is provided with a check valve I and is communicated with a water outlet end of the tail end 6, when the water separator II 61 is communicated with the heating device of the heat preservation water tank, the heat exchange system 3 heats stored water in the heat preservation water tank to store heat and is used for assisting heating, a water supplementing valve II and a blow-down valve II are arranged on the heat preservation water tank, a thermometer is internally installed, and the thermometer detects the temperature of the stored water in the heat preservation water tank in real time and transmits information to the controller 1 so as to control the starting and stopping of the heating device of the hot water system 4 and judge whether the auxiliary heating can be carried out through the hot water system 4;
when the water heating system 4 is used for heating, the water separator II 61 is closed, the heat exchange system 3, the tail end 6 and the heating device of the water heating system 4 are disconnected, and the water outlet end of the tail end 6 and the water return port of the heat preservation water tank are connected, so that hot water in the heat preservation water tank circulates between the tail end 6 and the heat preservation water tank to realize auxiliary heating.
The working principle of the refrigeration in this embodiment is the same as that of the prior art, and will not be described here again.
The working principle of the heating of this embodiment is as follows:
the time relay provides time information for the controller 1, and the controller 1 provides three unit operation modes according to the time information:
working condition one: during daytime, judging whether the water temperature in the heat preservation water tank detected by the thermometer can meet the heating requirement, taking floor heating as an example, wherein the required water temperature is about 40 ℃, and the heating requirement can be met when the water storage temperature is generally between 45 ℃ and 55 ℃;
s1, when the requirements can be met, the connection between the heat exchange system 3 and the tail end 6 as well as the hot water system 4 is cut off, the hot water system 4 and the tail end 6 are communicated, and the tail end 6 takes heat from the hot water system 4 to heat;
the light control sensor provides illumination information for the controller 1, and when the illumination is judged to be good, the energy acquisition system 2 is switched and connected to the geothermal supplementing system 5, and the geothermal supplementing system 5 converts solar energy into heat of soil through circulating water in the buried pipe 22 for storage;
s2, if the energy cannot be met, the tail end 6 is continuously communicated with the heat exchange system 3, and the tail end 6 is heated by taking heat from soil through the heat exchange system 3 and the energy acquisition system 2;
working condition II: when the electricity is not used at night, the tail end 6 is communicated with the heat exchange system 3, and the tail end 6 is heated by taking heat from the soil through the heat exchange system 3 and the energy acquisition system 2;
and (3) working condition III: when in valley electricity, the tail end 6 is communicated with the heat exchange system 3, and the tail end 6 is heated by taking heat from soil through the heat exchange system 3 and the energy acquisition system 2;
meanwhile, the output end of the heat exchange system 3 is communicated with a heating device of the hot water system 4, the heat exchange system 3 heats stored water in the heat preservation water tank while heating until the thermometer detects that the water temperature in the heat preservation water tank is not raised any more to stop, and low-price electricity is used for storing heat to meet the condition that the hot water system 4 is required to perform supplementary heating under the first working condition.
Specifically, the "U" end of the buried pipe 22 is enclosed in the lower cover 73, the lower cover 73 is configured to have a structure with a small bottom and a large top, two drill bits 72 are disposed below the lower cover 73 in a staggered manner, when the power element is connected, the two drill bits 72 continuously push the soil below the lower cover 73 to the periphery, so that the soil is extruded to backfill upwards along the side wall of the lower cover 73, and the transmission shaft 721 above the lower cover 73 and the buried pipe 22 are all disposed along the vertical direction, so that the backfilled soil can easily move downwards continuously, thereby realizing the burying of the buried pipe 22, and the soil at different depths below the ground only moves upwards to a small height, so that the soil property at the buried pipe 22 is basically consistent with the surrounding environment, thereby ensuring the stability of the heat exchange rate and being beneficial to maintaining the soil heat balance;
the hot water system 4 is connected in parallel to the tail end 6, heat pre-storage is carried out through the hot water system 4 by utilizing the valley electricity period, so that heat can be selected to be taken from the hot water system 4 for heating during the daytime, the continuous heat taking of the energy collecting system 2 from the soil is changed into intermittent heat taking, the self heat transfer time is provided for the soil layer of the buried pipe, the working efficiency of the energy collecting system 2 is improved, the heat balance maintaining capacity of the soil is improved, and meanwhile, the hot water system 4 is used as a supplementary heat source, so that the indoor heating requirement is met when the heat taking from the soil is stopped;
the heat exchange system 3 and the geothermal compensating system 5 are connected in parallel and communicated with the energy collecting system 2, when the hot water system 4 is selected for heating in daytime and the illumination condition is good, the geothermal compensating system 5 can be communicated, the solar energy is converted into the heat for the soil to be stored by heating the circulating water in the buried pipe 22, the soil heat is supplemented, the heat balance of the soil is promoted, the temperature difference of the input end of the heat exchange system 3 is improved, and the heating effect of a unit is improved.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Claims (7)
1. The utility model provides a ground source heat pump unit for building heating, includes heat exchange system (3), the input and the output of heat exchange system (3) are connected with energy acquisition system (2) and terminal (6) respectively, its characterized in that: the energy collection system (2) is connected with the geothermal supplementing system (5), the geothermal supplementing system (5) and the heat exchange system (3) are arranged in parallel, when the geothermal supplementing system (2) is connected with the geothermal supplementing system (5), the geothermal supplementing system (5) is used for supplementing heat to soil, the output end of the heat exchange system (3) is connected with the hot water system (4), the hot water system (4) is connected with the tail end (6), the controller (1) is electrically connected with the geothermal supplementing system (2), the controller (1) is electrically connected with the time relay, a plurality of buried pipes (22) of the energy collection system (2) are provided with the buried pipe assemblies (7), the buried pipe assemblies (7) comprise an upper cover (71) and a lower cover (73), the U-shaped parts of the buried pipes (22) are arranged in the lower cover (73), the upper cover (73) is electrically connected with the lower cover (73), the upper cover (721) is electrically connected with the lower cover (73), the two transmission shafts (721) are respectively arranged at two sides of the buried pipe (22), the bottom ends of the transmission shafts (721) are extended to form lower sealing covers (73) and are connected with drill bits (72), the two drill bits (72) are intersected, the drill bits (72) are conical, the lower sealing covers (73) are attached to the conical bottom ends of the drill bits (72), the bottom ends of the lower sealing covers (73) are inwards contracted to a size from the outer edge to the center, which is smaller than the size from the outer edge to the center of the bottom ends of the drill bits (72), gear sets (75) are arranged in the upper sealing covers (71), two output ends of the gear sets (75) are respectively connected with the two transmission shafts (721), the two transmission shafts (721) are opposite in rotation direction, and the input ends (751) of the gear sets (75) are upwards extended to form upper sealing covers (71) and can be connected with external power elements.
2. The ground source heat pump unit for building heating according to claim 1, wherein: the energy collection system (2) comprises a first water separator (21), a bus of the first water separator (21) is communicated with an input water return port of the heat exchange system (3), a plurality of branching lines of the first water separator (21) are all communicated with a buried pipe (22), a plurality of other ends of the buried pipes (22) are communicated with an input water inlet of the heat exchange system (3) after being converged, and a water supplementing device (23) and a first blow-down valve (24) are communicated on a bus pipeline of the energy collection system (2).
3. The ground source heat pump unit for building heating according to claim 2, wherein: and the ground buried pipes (22) are converged and then are communicated with the input end of the geothermal supplementing system (5), and the output end of the geothermal supplementing system (5) is communicated with the bus of the first water separator (21).
4. The ground source heat pump unit for building heating according to claim 1, wherein: the geothermal supplementing system (5) comprises a solar heat collecting plate (51), a thermal supplementing circulating pump (52) and an electromagnetic valve (53) are arranged between a water inlet of the solar heat collecting plate (51) and a buried pipe (22), a water outlet of the solar heat collecting plate (51) is connected with a third check valve (55), the water outlet side of the third check valve (55) is an output end of the geothermal supplementing system (5), and a light control sensor is arranged on the geothermal supplementing system (5).
5. The ground source heat pump unit for building heating according to claim 1, wherein: the heat exchange system (3) comprises a condenser (33) and an evaporator (35), one end of the condenser (33) and one end of the evaporator (35) which are in external circulation are respectively communicated with two ports of a first three-way valve (321) and two ports of a second three-way valve (322), the other port of the first three-way valve (321) is communicated with a water outlet of a collecting and circulating pump (31), the water inlet of the collecting and circulating pump (31) is an input end water inlet of the heat exchange system (3), the other port of the second three-way valve (322) is communicated with a first end circulating pump (38), the water outlet end of the first end circulating pump (38) is an output end water outlet of the heat exchange system (3), the other ends of the condenser (33) and the external circulation of the evaporator (35) are respectively communicated with two ports of a first three-way valve (371) and two ports of a second three-way valve (372), the other port of the first three-way valve (371) is communicated with a second check valve (39), and the other port of the second three-way valve (371) is communicated with the water outlet of the heat exchange system (3), and the water outlet end of the second three-way valve (39) is an output end of the heat exchange system (372).
6. The ground source heat pump unit for building heating according to claim 5, wherein: the internal circulation of the condenser (33) is correspondingly communicated with the internal circulation of the evaporator (35), and a compressor (34) and an expansion valve (36) are respectively arranged on two sections of connecting pipelines of the internal circulation of the condenser (33) and the internal circulation of the evaporator (35).
7. The ground source heat pump unit for building heating according to claim 1, wherein: the hot water system (4) comprises a heat preservation water tank, a water separator II (61) is communicated with a water outlet at the output end of the heat exchange system (3), a branching line of the water separator II (61) is respectively communicated with a tail end (6) and a heating device of the heat preservation water tank, a water outlet end of the heating device of the heat preservation water tank is provided with a first check valve and is communicated with a water outlet end of the tail end (6), and a water supplementing valve, a second blow-down valve and a thermometer are arranged on the heat preservation water tank.
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| CN208720492U (en) * | 2018-08-17 | 2019-04-09 | 河南省建筑科学研究院有限公司 | A kind of ground heat exchanger and ground-source heat pump system |
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2024
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| JPS5596869A (en) * | 1979-01-17 | 1980-07-23 | Mitsubishi Electric Corp | Hot-water supply system utilizing solar heat |
| CN101358784A (en) * | 2008-09-24 | 2009-02-04 | 天津大学 | Solar thermal storage and geothermal heat pump group system |
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| CN117570504A (en) | 2024-02-20 |
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