CN203893493U - Hot and cold water type geothermal heat pump system with function of heat recovery - Google Patents

Hot and cold water type geothermal heat pump system with function of heat recovery Download PDF

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Publication number
CN203893493U
CN203893493U CN201420256078.5U CN201420256078U CN203893493U CN 203893493 U CN203893493 U CN 203893493U CN 201420256078 U CN201420256078 U CN 201420256078U CN 203893493 U CN203893493 U CN 203893493U
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China
Prior art keywords
heat
heat exchanger
hot
outlet
pump
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Expired - Fee Related
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CN201420256078.5U
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Chinese (zh)
Inventor
龙清泳
吴锋
余庆良
王文祥
季海军
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JIANGXI NUOBAO ELECTRIC APPLIANCE CO Ltd
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JIANGXI NUOBAO ELECTRIC APPLIANCE CO Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Abstract

The utility model discloses a hot and cold water type geothermal heat pump system with a function of heat recovery. The system comprises compressors, a heat recoverer, a four-way reversing valve, a heat source side heat exchanger, a throttling device and a control loop. The compressors are in parallel, the heat recoverer is connected between the compressors and the four-way reversing valve and responsible for sensible heat recovery and total heat recovery of the single compressor, and the controller controls flow switching of the four-way valve and on and off of an electromagnetic valve to realize various operating modes, including combinations of refrigerating, heating, hot water and heat recovery, of the system. Compared with the prior art, the hot and cold water type geothermal heat pump system with the function of heat recovery has the advantages that a solution of the heat pump system capable of realizing partial heat recovery and safe total heat recovery is provided and the system is versatile, stable, reliable, efficient, high cost performance and widely applicable to the fields of comfort air conditioning and technical cooling.

Description

A kind of hot and cold water type earth-source hot-pump system with heat recovery function
Technical field
The utility model relates to Refrigeration & Air-Conditioning equipment technical field, specifically a kind of hot and cold water type earth-source hot-pump system with heat recovery function.
Background technology
In air-conditioning refrigeration system, compressor air-discharging condensation heat is carried out heat exchange by unit inner condenser, for air source heat pump, this part condensation heat passes to air and distributes in atmospheric environment, and traditional handpiece Water Chilling Units is cooled after water absorbs and by cooling tower, is released in atmosphere.Along with Domestic Air-condition installed capacity is day by day surging, the tropical island effect of air-conditioning has become the large dirt disease in city one, and building air conditioning is energy-saving and cost-reducing has become national active demand, and then has expedited the emergence of the air-conditioning unit of configuration heat recovery function.The air-conditioning that adopts heat recovery technology, can partly or entirely reclaim compressor air-discharging condensation heat, can directly reduce the heat extraction to atmosphere first; The refrigerating operaton efficiency that second can improve unit, is of value to the energy-saving and emission-reduction of air-conditioning; The domestic hot-water that three recovering condensing heats are produced can improve the comfortable quality of life of the people; On the other hand, for emerging earth source heat pump unit, adopt refrigeration heat recovery technology can reduce the heat extraction to soil, thereby can reduce underground loop design of heat exchanger area, reduce construction costs, be also conducive to thermal balance simultaneously.Can predict, the air-conditioning unit of configuration heat recovery function has a extensive future.
Adopt at present the air-conditioning unit of heat recovery technology, general minute two large classes, one class can only be carried out part recuperation of heat, be that sensible heat reclaims, its system is shown in schematic diagram 1, be characterized in that heat regenerator is serially connected with between compressor and four-way change-over valve, heat regenerator capacity is little, generally can only reclaim below 25% of unit standard cold.If this system is used in full recuperation of heat, because of after four-way change-over valve is positioned at heat regenerator, liquid can not may cause four-way change-over valve to break down by hydraulic compression, system reliability is low, thereby impracticable.Another kind ofly carry out whole recuperations of heat, the sensible heat and the latent heat that are compressor air-discharging are all recyclable, system forms generally 2 kinds, the first is shown in schematic diagram 2, be characterized in flowing to the incompatible realization of control group by two four-way change-over valves and three heat exchangers, this full heat recovery system pipeline forms and controls all quite complicatedly, makes that unit reliability reduces, cost is higher, particularly after two four-way change-over valves serial connections, can switch the hidden danger that exist switching not in place because cross valve needs enough pressure reduction.The second is shown in schematic diagram 3, is characterized in controlling refrigerant flow direction and then realizing whole recuperations of heat by a plurality of magnetic valves, and the hidden danger that this system also exists four-way change-over valve to switch, and magnetic valve affects integrity problem for a long time in exhaust high temperature.
Utility model content
The purpose of this utility model is to provide a kind of hot and cold water type earth-source hot-pump system with heat recovery function that part recuperation of heat and whole recuperations of heat are integrated in one, this heat pump forms simple, dependable performance, and cost is reasonable, implementary value is high, to solve the problem proposing in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of hot and cold water type earth-source hot-pump system with heat recovery function, comprise compressor unit, heat regenerator, ground source heat exchanger, device for drying and filtering, electric expansion valve and control loop, the import of compressor unit connects four-way change-over valve, the outlet of compressor unit connects the import of heat regenerator, the branch road I of the outlet of heat regenerator connects the interface D of four-way change-over valve, heat regenerator and outside boiler, heat-exchanger pump forms the circulatory system, the interface E of four-way change-over valve connects the import of user's side heat exchanger, user's side heat exchanger and outside air-conditioning, water pump of air conditioner forms the circulatory system, the interface C of four-way change-over valve connects the import of ground source heat exchanger, ground source heat exchanger and outside ground heat exchanger, ground source water pump forms the circulatory system, the outlet of user's side heat exchanger, the branch road II of heat regenerator outlet is all connected with the import of device for drying and filtering with the branch road I of ground source heat exchanger exit, between the branch road II of heat regenerator outlet and the import of device for drying and filtering, be provided with magnetic valve, the outlet connecting electronic expansion valve of device for drying and filtering, the outlet of electric expansion valve is all connected with check valve P with ground source heat exchanger exit branch road II, the outlet of check valve P is connected with the outlet of user's side heat exchanger.
As further program of the utility model: be provided with check valve M between the outlet of described user's side heat exchanger and the import of device for drying and filtering, between the branch road I of described ground source heat exchanger exit and the import of device for drying and filtering, be provided with check valve L, between the branch road II of described ground source heat exchanger exit and check valve P, be provided with check valve N.
As further program of the utility model: described compressor unit is the system that constant volume compressor A and constant volume compressor B the variable-displacement parallel system, single variable conpacitance compressor or the single constant volume compressor that form and single variable conpacitance compressor form.
As the utility model scheme further: the heat exchange area of described heat regenerator is 60~80% of ground source heat exchanger heat exchange area.
Compared with prior art, the beneficial effects of the utility model are:
Compressor variable capacity configuration, can improve the operational energy efficiency under unit sub-load on the one hand, takes into account on the other hand part recuperation of heat and designs with the security of system that full recuperation of heat is melted into a whole.
Heat regenerator is serially connected with between exhaust outlet of compressor and four-way change-over valve, heat regenerator capacity reclaims according to both carrying out compressor unit condensation sensible heat, and in the time of can bearing safely again in double-compressor the whole condensation heat of single compressor or single variable conpacitance compressor load shedding and move below 60%, compressor air-discharging condensation heat all reclaims design.
Design magnetic valve bypass condensate liquid branch road, when whole recuperations of heat, exports condensed fluid by heat regenerator and relies on pressure differential to branch to liquid line before throttling arrangement, takes precautions against condensed fluid and all by four-way change-over valve, causes adverse effect.
The flow direction of the four-way change-over valve by simple this system of control is switched and the break-make of magnetic valve, can realize refrigeration, heat, hot water, the combined plurality of operating modes of recuperation of heat, realize one-machine-multi-function, can significantly reduce the investment of user's air-conditioning equipment, the refrigerating operaton heat recovery function simultaneously having, can freely produce domestic hot-water, improve unit operation efficiency.
Accompanying drawing explanation
Fig. 1 is the air-conditioning system schematic flow sheet of part recuperation of heat.
Fig. 2 is air-conditioning system 1 schematic flow sheet of whole recuperations of heat.
Fig. 3 is air-conditioning system 2 schematic flow sheets of whole recuperations of heat.
Fig. 4 is the hot and cold water type earth-source hot-pump system schematic flow sheet with heat recovery function.
In figure: 1-compressor A; 2-compressor B; 3-heat regenerator; 4-four-way change-over valve; 5-ground source heat exchanger; 6-device for drying and filtering; 7-electric expansion valve; 8-user's side heat exchanger; 9-magnetic valve; 10-check valve L; 11-check valve P; 12-check valve M; 13-check valve N; 14-water pump of air conditioner; 15-ground source water pump; 16-heat-exchanger pump; 17-boiler; 18-air-conditioning; 19-ground heat exchanger; 20-condenser; 21-evaporimeter.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1~4, in the utility model embodiment, a kind of hot and cold water type earth-source hot-pump system with heat recovery function, comprise compressor unit, heat regenerator 3, source heat exchanger 5, device for drying and filtering 6, electric expansion valve 7 and control loop.
Compressor unit is that a kind of low-cost configuration, two constant volume compressor parallels form, and oil balance tube and corresponding operation measures is set and guarantees equilibrium operating; Heat regenerator 3 is arranged on the higher-pressure region between exhaust outlet of compressor and four-way change-over valve 4, take into account rational exhaust crushing and can bear safely part recuperation of heat and whole heat recovery function, heat regenerator 3 is public passage formula heat exchanger, its heat exchange area is according to 75% design of ground source heat exchanger 5 heat exchange areas, reduce system charging amount and save high pressure receiver, simplification system also improves efficiency.
The interface D of four-way change-over valve 4 connects heat regenerator 3, and interface E connects user's side heat exchanger 8, and interface C connects ground source heat exchanger 5; When four-way change-over valve 4 is during in power failure state, cold-producing medium flows to mouth of pipe C from mouth of pipe D, and this is traditional refrigerating operaton direction; If the refrigerating operaton time in the whole year is short, four-way change-over valve 4 mouth of pipe C can be connected to user's side heat exchanger 8, when refrigerating operaton, make four-way change-over valve 4 obtain electric; Magnetic valve 9 is closed type, when routine refrigeration and heating operation, generally in closed condition.
By simple control four-way change-over valve 4, the conducting state of magnetic valve 9 and the operation of water pump, can be realized recuperation of heat and refrigeration, be heated combined multiple-working mode, the control of valve member and water pump is referring to table 1.
Mode of operation Four-way change-over valve Magnetic valve Water pump of air conditioner Ground source water pump Hot water water pump
Refrigeration Dead electricity Dead electricity Operation Operation Close
Heat Obtain electric Dead electricity Operation Operation Close
Hot water Obtain electric Obtain electric Close Operation Operation
The recuperation of heat of refrigeration+part Dead electricity Dead electricity Operation Operation Operation
Refrigeration+full recuperation of heat Dead electricity Obtain electric or dead electricity Operation Stop or moving Move or stop
When refrigeration and heating operation, water pump of air conditioner 14 and 15 operations of ground source water pump, system is not carried out recuperation of heat hot water water pump and is closed, heat regenerator 3 is as exhaust passage, magnetic valve 9 dead electricity, during refrigeration, exhaust guides to source heat exchanger 5 through four-way change-over valve 4 and carries out condensation heat release, is directed to user's side heat exchanger 8 and carries out condensing heat-exchange while heating.
When hot water moves, user's side air-conditioning 18 ends are not worked, and water pump of air conditioner 14 is closed, ground source water pump 15 and heat-exchanger pump 16 operations, and four-way change-over valve 4 obtains electric, and magnetic valve 9 obtains electric; Heat regenerator 3 absorbs the exhaust condenser heat of compressor and heats health hot water as the condenser of system, the refrigerant liquid that its condensation is got off is through magnetic valve 9 branch road guiding electric expansion valves 7, and the low-pressure low-temperature cold-producing medium after throttling carries out heat exchange at ground source heat exchanger 5 and water or anti-icing fluid from ground heat exchanger 19.
Hot water operation is by the exhaust condensation heat design of all reclaiming single compressor, now single compressor operation, water pump of air conditioner 14 stops, ground source water pump 15 and heat-exchanger pump 16 operations, magnetic valve 9 obtains electric, and the exhaust of compressor HTHP is through heat regenerator 3 condensations, transfer heat to again hot water and make it heat temperature raising, the cold-producing medium that is condensed into liquid to electric expansion valve 7, becomes low-pressure low-temperature liquid-vapor mixture through magnetic valve 9 branch roads after throttling, then enters ground source heat exchanger 5 and absorb underground loop heat of vaporization.
Hot water operation simultaneously, by suitably controlling, also can realize and reclaim double-compressor condensation heat.After unit is opened, water pump of air conditioner 14 stops, ground source water pump 15 and heat-exchanger pump 16 operations, and magnetic valve 9 obtains electric, and after single compressor puts into operation, unit reclaims the whole condensation heat of single compressor in advance; When power system capacity loads, the second compressor puts into operation, along with the progressively increase of the rising of hot water water temperature and system exhaust pressure, when the pressure at expulsion Pd >=P1(of system hot water switches pressure at expulsion setting value) time, exit a compressor operation, be returned to single compressor water heating pattern.
Part recuperation of heat is in refrigeration and heating operation pattern, as long as heat-exchanger pump 16 is opened, heat regenerator 3 can be exported hot water.When refrigerating operaton, after heat-exchanger pump 16 work, the hot water that heat regenerator 3 is produced is free, and because the partial condensation heat of recovery system reduces condenser duty, condensation temperature reduces and system effectiveness is improved; During heating operation, because need first meeting the heat demand of user's side, generally do not open heat-exchanger pump 16, be i.e. during practical application, do not adopt heat+part recuperation of heat operational mode.
In refrigeration+full heat recovery mode, take and freeze as mode of priority, and process heat-exchanger pump 16 and magnetic valve 9 operations according to system exhaust pressure and water temperature control target.If enter this operational mode, after unit start, water pump of air conditioner 14 operations, heat-exchanger pump 16 operations, ground source water pump 15 stops, magnetic valve 9 obtains electric, after compressor puts into operation, heat regenerator 3 reclaims the whole condensation heat of compressor, along with the increase of the rising of hot water water temperature and system exhaust pressure, when pressure at expulsion setting value is switched in the full recuperation of heat of the pressure at expulsion Pd >=P2(of system) time, ground source water pump 15 puts into operation, magnetic valve 9 dead electricity, exit full recuperation of heat operational mode, now carry out refrigeration+part heat recovery mode.When hot water water temperature reaches control point and freezes water temperature end then, if with refrigeration mode of priority, water pump of air conditioner 14 keeps operation, 15 operations of ground source water pump, and heat-exchanger pump 16 is out of service, magnetic valve 9 dead electricity; If with hot water mode of priority, compressor is out of service, ground source water pump 15 is out of service, and water pump of air conditioner 14 keeps operation, magnetic valve 9 dead electricity with heat-exchanger pump 16.When refrigeration water temperature reach desired value and hot water water temperature control point not then, to freeze mode of priority, compressor is out of service, ground source water pump 15 maintains the original state, heat-exchanger pump 16 is out of service, water pump of air conditioner 14 keeps operation, magnetic valve 9 dead electricity.
In control loop; after the pressure that controller receiving sensor detects and the key-press input signal of temperature signal, all kinds of protection input signal and artificial intelligence terminal; according to built-in control logic, to controlled water pump, four-way change-over valve, electric expansion valve, magnetic valve, compressor, send instruction and carry out corresponding actions.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present utility model or essential characteristic, can realize the utility model with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than above-mentioned explanation, is therefore intended to include in the utility model dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should make description as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.

Claims (4)

1. the hot and cold water type earth-source hot-pump system with heat recovery function, comprise compressor unit, heat regenerator (3), ground source heat exchanger (5), device for drying and filtering (6), electric expansion valve (7) and control loop, it is characterized in that, the import of compressor unit connects four-way change-over valve (4), the outlet of compressor unit connects the import of heat regenerator (3), the branch road I of heat regenerator (3) outlet connects the interface D of four-way change-over valve (4), heat regenerator (3) and outside boiler (17), heat-exchanger pump (16) forms the circulatory system, the interface E of four-way change-over valve (4) connects the import of user's side heat exchanger (8), user's side heat exchanger (8) and outside air-conditioning (18), water pump of air conditioner (14) forms the circulatory system, the interface C of four-way change-over valve (4) connects the import of ground source heat exchanger (5), ground source heat exchanger (5) and outside ground heat exchanger (19), ground source water pump (15) forms the circulatory system, the outlet of user's side heat exchanger (8), the branch road II of heat regenerator (3) outlet is all connected with the import of device for drying and filtering (6) with the branch road I of ground source heat exchanger (5) outlet, between the branch road II of heat regenerator (3) outlet and the import of device for drying and filtering (6), be provided with magnetic valve (9), the outlet connecting electronic expansion valve (7) of device for drying and filtering (6), the outlet of electric expansion valve (7) and ground source heat exchanger (5) outlet branch road II all with check valve P(11) be connected, check valve P(11) outlet is connected with the outlet of user's side heat exchanger (8).
2. the hot and cold water type earth-source hot-pump system with heat recovery function according to claim 1, it is characterized in that, between the import of the outlet of described user's side heat exchanger (8) and device for drying and filtering (6), be provided with check valve M(12), between the branch road I of described ground source heat exchanger (5) outlet and the import of device for drying and filtering (6), be provided with check valve L(10), branch road II and check valve P(11 that described ground source heat exchanger (5) exports) between be provided with check valve N(13).
3. the hot and cold water type earth-source hot-pump system with heat recovery function according to claim 1, it is characterized in that, described compressor unit is constant volume compressor A(1) and constant volume compressor B(2) variable-displacement parallel system, single variable conpacitance compressor or the single constant volume compressor forming and the system of single variable conpacitance compressor formation.
4. the hot and cold water type earth-source hot-pump system with heat recovery function according to claim 1, is characterized in that, the heat exchange area of described heat regenerator (3) is 60~80% of ground source heat exchanger (5) heat exchange area.
CN201420256078.5U 2014-05-20 2014-05-20 Hot and cold water type geothermal heat pump system with function of heat recovery Expired - Fee Related CN203893493U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764192A (en) * 2015-03-27 2015-07-08 宁波奥克斯电气有限公司 Modular air cooled heat pump hot water unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764192A (en) * 2015-03-27 2015-07-08 宁波奥克斯电气有限公司 Modular air cooled heat pump hot water unit

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Granted publication date: 20141022

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