CN110345636A - The heat reclamation type air source hot pump water heater circulatory system and working method - Google Patents
The heat reclamation type air source hot pump water heater circulatory system and working method Download PDFInfo
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- CN110345636A CN110345636A CN201910695441.0A CN201910695441A CN110345636A CN 110345636 A CN110345636 A CN 110345636A CN 201910695441 A CN201910695441 A CN 201910695441A CN 110345636 A CN110345636 A CN 110345636A
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- Prior art keywords
- evaporator
- subcooler
- heat
- circulatory system
- condenser
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
-
- 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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of heat reclamation type air source hot pump water heater circulatory system and working method, which includes compressor, condenser, subcooler, expansion mechanism, evaporator and attached blower, air duct and the water tank of refrigerant pipe road connection；Compressor outlet is connected with condenser inlet；Condensator outlet is connected with subcooler entrance；Subcooler outlet is connected with expansion mechanism entrance；Expansion mechanism outlet is connect with evaporator inlet；Evaporator outlet is connected with suction port of compressor；All in air duct, blower makes air first flow through subcooler to enter back into evaporator for subcooler and evaporator.The present invention increases the degree of supercooling of circulation using subcooler, reduces the refrigerant mass dryness fraction into evaporator, improves the heat exchange property of circulatory system evaporator；The heat that subcooler releases simultaneously is absorbed back in system again by evaporator, realizes the recycling of heat；The air before entering evaporator is preheated using subcooler, evaporating temperature can be improved, to improve the coefficient of performance in heating of the circulatory system.
Description
Technical field
The invention belongs to air source heat pumps and air-conditioning technical field, are related to a kind of vapor compression heat pump water heater cyclic system
A kind of system, and in particular to air source hot pump water heater circulatory system and working method that recuperation of heat is realized using air-cooled subcooler.
Background technique
It is straight that the vapor compression heat pump circulatory system is widely used in air-source (water source, Di Yuan) Teat pump boiler, solar energy
Connect the fields such as expanding thermal pump water heater and corresponding heat pump air conditioner.It is simple, compact with system structure and efficiently saves
The features such as energy.It is increased rapidly recently as energy demand, amblent air temperature problem becomes increasingly conspicuous and the development of low-carbon economy, empty
Air supply heat pump technology as a kind of energy-saving and environmental protection heating technology improve the energy utilization efficiency, reduce greenhouse gases row
It puts and creates more comfortable environment etc. for human lives and work and more show its technological merit outstanding.Therefore, air
The development of source heat pump is very rapid, and especially the occupation rate of market of air source hot pump water heater is continuously improved, the phase of heat pump techniques
Research is closed also to constantly bring forth new ideas under the guiding of application.
Currently, the main problem for influencing the development of air source hot pump water heater technology is air source hot pump water heater heating capacity
Reduced with coefficient of performance in heating with the reduction of ambient air temperature, and with water tank water temperature it is continuous raising and drop
It is low；Therefore limitation and repeats itself characteristic of the use by environment temperature of air source hot pump water heater are influenced, it low
Warm environmental suitability and continuous heating performance have become the technology barrier in practical application, improve the circulatory system coefficient of performance and mention
High heating capacity also just becomes research and development direction important in this technical field.
The conventional steam compression type air source hot pump water heater circulatory system mainly by compressor, condenser, expansion mechanism and
Evaporator composition.In the conventional steam compression type air source hot pump water heater circulatory system, with evaporating temperature reduction (i.e.
Ambient air temperature reduces), the inspiratory volume of the drop of suction pressure of compressor, compressor increases, and pressure ratio will also increase, thus
So that the unit volume heating capacity of the circulatory system declines, compressor wasted work increases, and will lead to heat pump heating capacity and heating performance
Coefficient significantly reduces.Ambient air temperature locating for air source hot pump water heater is usually regional, seasonal, uncontrollable
, in contrast, the raising (with the raising of water temperature in water tank) of air source hot pump water heater condensation temperature is universal, all
It is phase property and being expected.With the continuous raising of condensation temperature, the delivery temperature and pressure rise of compressor, pressure ratio is continuous
Increase, compressor wasted work increases, and will lead to heat pump heating capacity and coefficient of performance in heating significantly reduces.
To solve the problems, such as that heat pump performance reduces under above-mentioned operating condition, has researcher to propose two stages of compression and autocascade cycle shape
Formula can effectively solve pressure ratio problems of too when the heating of the big temperature difference, but double compressor system undoubtedly considerably increases answering for system
Miscellaneous degree and failure rate, therefore it is chiefly used in high temperature heat pump field.On this basis, researcher proposes several single compressors quasi-
Two-stage compression circulation form, including with flash evaporation and with the two kinds of air injection enthalpy-increasing circulatory systems and band of economizer (subcooler)
The second vapor injection circulatory system of injector.The quasi- two-stage compression circulation form of these types has greatly simplification compared to double compressor system,
However, requiring to have certain processing and design difficulty using the compressor with auxilairy air intake, be not suitable for common scroll compression
Contracting machine or not with the compressor of auxilairy air intake.
It in addition to the above techniques, is exactly to condensation there are also a kind of method that can effectively improve heat pump circulating system efficiency
Later temperature refrigerant liquid is subcooled, similar with above-mentioned several circulations, dry after equally can reduce refrigerant throttling
Degree, prevents the performance of evaporator from deteriorating because inlet refrigerant mass dryness fraction is larger.For this characteristic, have scholar propose it is a variety of not
Same crosses SAPMAC method, including mechanical super cooling circulation (needing another attached a set of vapor compression refrigeration system), and injection crosses SAPMAC method (compression
Injector is arranged after machine, crosses cold loop for injection), water cooling is crossed SAPMAC method and (was carried out with into the water at low temperature before condenser
It is cold), air-cooled to cross SAPMAC method (be subcooled with air, but do not have recuperation of heat), condensate evaporated SAPMAC method (outside collection evaporator
The condensate of generation is absorbed heat for subcooler surface evaporation), internal backheat crosses the SAPMAC method (temperature refrigerant liquid that condenser comes out
Carry out internal backheat with the low temperature refrigerant gas that evaporator comes out) etc. forms.These supercooled forms can go out condenser
The refrigerant liquid come further cools down, some heats discharged when refrigerant liquid can also be subcooled are recovered to system again
In, it only needs to carry out basic heat pump circulating system different degrees of transformation.Most of SAPMAC method of crossing is relative to second level pressure
It is smaller to the change of system for contracting and quasi- two-stage compression, but have the disadvantage that there is no the pressure ratios to the circulatory system and heating to imitate
Improvement is brought in terms of rate.
Summary of the invention
To solve above-mentioned defect existing in the prior art and deficiency, simplified the complexity of cooling system, the present invention mentions
The heat reclamation type air source hot pump water heater circulatory system and working method for having gone out a kind of air-cooled subcooler of band, using into evaporator
The refrigerant liquid that preceding air comes out condenser is subcooled, and reduces the refrigerant mass dryness fraction into evaporator, while by
It has been transferred heat in subcooler in refrigerant liquid into the air before evaporator, evaporating temperature can be improved, to mention
High system circulation efficiency.
In order to achieve the above objectives, the technical scheme adopted by the invention is that:
The heat reclamation type air source hot pump water heater circulatory system, refrigerant side, the outlet of compressor 101 and condenser 102
Entrance be connected；The outlet of condenser 102 is connected with the entrance of subcooler 103；The outlet of subcooler 103 and expansion mechanism
104 entrance is connected；The outlet of expansion mechanism 104 is connect with the entrance of evaporator 105；The outlet of evaporator 105 and compressor
101 entrance is connected；Air side, subcooler 103 and the front face area having the same of evaporator 105, are installed in air duct 107
It is interior；Water side: condenser 102 is tightly attached on the inner wall of water tank 108, and water tank 108 stores the hot water that condenser 102 generates.
The refrigerant liquid come out from condenser 102, is introduced into subcooler 103 and is subcooled, enter back into expansion mechanism 104
Carry out throttling expansion.
The subcooler 103 is forced convertion air cooling fin pipe heat exchanger, shares a blower 106 with evaporator 105
With air duct 107, blower 106 provides power for air circulation, and air is introduced into subcooler 103 and enters back into evaporator 105.
Subcooler 103 realizes 105 entering air temperature of increase and evaporator for the preceding refrigerant degree of supercooling that throttles simultaneously
It is promoted.
The working method of the heat reclamation type air source hot pump water heater circulatory system, low pressure refrigerant gas enter pressure
Contracting machine 101 is compressed to high pressure steam by input mechanical energy and enters condenser 102, releases heat and is condensed into saturation or supercooling
Liquid, while realizing heating purpose；The refrigerant liquid come out from condenser 102 enters subcooler 103, releases heat wherein
Amount obtains the lower supercooling refrigerant liquid of temperature；The refrigerant liquid that subcooler 103 comes out enters expansion mechanism 104 and is saved
Stream decompression, absorbing heat of vaporization subsequently into evaporator 105 is superheated vapor, and the refrigerant vapour come out from evaporator 105 is again
Into compressor 101, a cyclic process is completed；Firstly, the degree of supercooling of circulation is increased because of the super cooling effect of subcooler 103,
The refrigerant mass dryness fraction into evaporator 105 is reduced, the chance that refrigerant liquid is contacted with evaporator tube inner wall is improved, is improved
The heat exchange efficiency of circulatory system evaporator 105；Secondly as the heat that subcooler 103 releases is inhaled again by evaporator 105
In withdrawal system, the recycling of heat is realized；Finally, being carried out into the air before evaporator 105 using 103 Duis of subcooler
Preheating improves evaporating temperature, to improve the coefficient of performance in heating of the circulatory system.
It is recycled compared to existing air source hot pump water heater, the present invention has the advantage that
1, the refrigerant liquid that condenser comes out further is cooled down by subcooler, reduces evaporator inlet system
The mass dryness fraction of cryogen increases the chance that evaporator tube wall is contacted with refrigerant liquid, improves the heat exchange efficiency of evaporator.
2, before by the way that subcooler is arranged in evaporator air inlet, the heat that subcooler sheds outward can be not only recycled,
And the temperature of evaporator inlet air is improved, the evaporating temperature of entire heat pump system is improved, to reduce compressor
Pressure ratio obtains higher heating efficiency.
Present system is a kind of effective, feasible improvement plan, and the mass dryness fraction of evaporator inlet refrigerant can be effectively reduced,
And the temperature of evaporator inlet air is improved, to improve the overall performance of air source hot pump water heater, promote Teat pump boiler
The development of product power-saving technology.
Detailed description of the invention
Fig. 1 is the novel heat reclamation type air source hot pump water heater circulatory system schematic diagram of the present invention.
Fig. 2 is circulation pressure-enthalpy diagram of the novel heat reclamation type air source hot pump water heater circulatory system course of work of the present invention
(p-h figure).
Specific embodiment
As shown in Figure 1, the novel heat reclamation type air source hot pump water heater circulatory system of the invention, including refrigerant line
Compressor 101, condenser 102, subcooler 103, expansion mechanism 104 and the evaporator 105 of upper connection；And attached blower
106, air duct 107 and water tank 108.Refrigerant side: the outlet of the compressor 101 is connected with the entrance of condenser 102；
The outlet of condenser 102 is connected with the entrance of subcooler 103；The entrance phase of the outlet of subcooler 103 and expansion mechanism 104
Even；The outlet of expansion mechanism 104 is connect with the entrance of evaporator 105；The entrance phase of the outlet of evaporator 105 and compressor 101
Connection.Air side: subcooler 103 and the front face area having the same of evaporator 105 are installed in air duct 107, blower 106
Power is provided for air circulation, air is introduced into subcooler 103 and enters back into evaporator 105.Water side: condenser 102 is tightly attached to storage
On the inner wall of water tank 108, water tank 108 stores the hot water that condenser 102 generates.By connecting above, constitute complete novel
The heat reclamation type air source hot pump water heater circulatory system.
Its course of work is: as shown in Fig. 2, low pressure refrigerant gas (at 1 point) enters compressor 101, passing through input
Mechanical energy is compressed to high pressure steam and enters condenser 102 (at 2 points), releases heat and is condensed into saturation or subcooled liquid (3
At point), while realizing heating purpose；The refrigerant liquid come out from condenser 102 enters subcooler 103, releases wherein
Heat obtains the lower supercooling refrigerant liquid of temperature (at 4 points)；The refrigerant liquid that subcooler 103 comes out enters expanding machine
Structure 104 carries out reducing pressure by regulating flow (at 5 points), and absorbing heat of vaporization subsequently into evaporator 105 is superheated vapor (such as institute in Fig. 2
Show 5 to 1 process), the refrigerant vapour come out from evaporator 105 enters back into compressor 101 (at 1 point), completes one and follows
Ring process.
It (is recycled as shown by the dash line in figure 2) compared to the conventional vapor compression heat pump circulatory system, in same state of cyclic operation
Under condition (ambient air temperature and condensation temperature), especially when condensation temperature is increased as water tank water temperature increases,
In the heat pump cycle of the embodiment of the present invention, because of the super cooling effect of subcooler 103, the degree of supercooling of circulation is increased, entrance is reduced
The refrigerant mass dryness fraction of evaporator 105 improves the chance that refrigerant liquid is contacted with evaporator tube inner wall, improves the circulatory system
The heat exchange efficiency of evaporator 105；On the other hand, it is since the heat that subcooler 103 releases is absorbed back again by evaporator 105
In system, the recycling of heat is realized；Finally, preheated into the air before evaporator 105 using 103 Duis of subcooler,
Evaporating temperature can be improved, to improve the coefficient of performance in heating of the circulatory system.
Compared with other several single compressor supercooling heat pump circulating systems mentioned in background technique, the embodiment of the present invention
Subcooled heat recovery form, it is not only smaller to system change, but also while realizing supercooling and backheat, it is warm that evaporation can also be improved
Degree.As seen from the above analysis, the novel heat reclamation type air source hot pump water heater circulatory system is improving air source heat pump system
There is apparent advantage in terms of hot property, can be applied to air source hot pump water heater system, can also be applied to heat pump type air conditioner
In device and Hot water units.
Claims (5)
1. the heat reclamation type air source hot pump water heater circulatory system, it is characterised in that: refrigerant side, the outlet of compressor (101)
It is connected with the entrance of condenser (102)；The outlet of condenser (102) is connected with the entrance of subcooler (103)；Subcooler
(103) outlet is connected with the entrance of expansion mechanism (104)；The outlet of expansion mechanism (104) and the entrance of evaporator (105) connect
It connects；The outlet of evaporator (105) is connected with the entrance of compressor (101)；Air side, subcooler (103) and evaporator (105)
Front face area having the same is installed in air duct (107)；Water side: condenser (102) is tightly attached to the interior of water tank (108)
On wall, water tank (108) stores the hot water that condenser (102) generate.
2. the heat reclamation type air source hot pump water heater circulatory system according to claim 1, it is characterised in that: from condenser
(102) come out refrigerant liquid, be introduced into subcooler (103) and be subcooled, enter back into expansion mechanism (104) throttle it is swollen
It is swollen.
3. the heat reclamation type air source hot pump water heater circulatory system according to claim 1, it is characterised in that: the supercooling
Device (103) is forced convertion air cooling fin pipe heat exchanger, shares a blower (106) and air duct with evaporator (105)
(107), blower (106) provides power for air circulation, and air is introduced into subcooler (103) and enters back into evaporator (105).
4. the heat reclamation type air source hot pump water heater circulatory system according to claim 1, it is characterised in that: subcooler
(103) increase of refrigerant degree of supercooling and the promotion of evaporator (105) entering air temperature before throttling are realized simultaneously.
5. the working method of the described in any item heat reclamation type air source hot pump water heater circulatory systems of Claims 1-4, special
Sign is: low pressure refrigerant gas enters compressor (101), is compressed to high pressure steam by input mechanical energy and enters condenser
(102), it releases heat and is condensed into saturation or subcooled liquid, while realizing heating purpose；The refrigeration come out from condenser (102)
Agent liquid enters subcooler (103), releases heat wherein and obtains the lower supercooling refrigerant liquid of temperature；Subcooler (103)
Refrigerant liquid out enters expansion mechanism (104) and carries out reducing pressure by regulating flow, absorbs heat of vaporization subsequently into evaporator (105)
For superheated vapor, the refrigerant vapour come out from evaporator (105) enters back into compressor (101), completes a cyclic process；It is first
First, because of the super cooling effect of subcooler (103), the degree of supercooling of circulation is increased, the refrigerant reduced into evaporator (105) is done
Degree, improves the chance that refrigerant liquid is contacted with evaporator tube inner wall, improves the heat exchange effect of circulatory system evaporator (105)
Rate；Secondly as the heat that subcooler (103) releases is absorbed back in system again by evaporator (105), heat is realized
It recycles；Finally, preheating using subcooler (103) to the air before entering evaporator (105), evaporating temperature is improved,
To improve the coefficient of performance in heating of the circulatory system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910695441.0A CN110345636A (en) | 2019-07-30 | 2019-07-30 | The heat reclamation type air source hot pump water heater circulatory system and working method |
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| CN201910695441.0A CN110345636A (en) | 2019-07-30 | 2019-07-30 | The heat reclamation type air source hot pump water heater circulatory system and working method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623628A (en) * | 2022-04-21 | 2022-06-14 | 合肥圣三松冷热技术有限公司 | Heat pump circulating system and working method thereof |
| CN115023573A (en) * | 2019-11-18 | 2022-09-06 | 三菱电器加热及冷却系统股份公司 | Air-cooled refrigeration cycle device |
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| CN105627470A (en) * | 2015-12-30 | 2016-06-01 | 同济大学 | Air conditioning unit based on supercooling and reheating |
| EP3332180A1 (en) * | 2015-08-07 | 2018-06-13 | De' Longhi Appliances S.r.l. Con Unico Socio | Perfected portable air conditioner |
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| US5689962A (en) * | 1996-05-24 | 1997-11-25 | Store Heat And Produce Energy, Inc. | Heat pump systems and methods incorporating subcoolers for conditioning air |
| CN201527134U (en) * | 2009-07-03 | 2010-07-14 | 特灵空调系统(中国)有限公司 | Total heat recovery refrigerating system for air conditioning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115023573A (en) * | 2019-11-18 | 2022-09-06 | 三菱电器加热及冷却系统股份公司 | Air-cooled refrigeration cycle device |
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Application publication date: 20191018 |