CN201508074U - Air source combined cycle refrigeration low-temperature heat pump machine set - Google Patents
Air source combined cycle refrigeration low-temperature heat pump machine set Download PDFInfo
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- CN201508074U CN201508074U CN 200920095594 CN200920095594U CN201508074U CN 201508074 U CN201508074 U CN 201508074U CN 200920095594 CN200920095594 CN 200920095594 CN 200920095594 U CN200920095594 U CN 200920095594U CN 201508074 U CN201508074 U CN 201508074U
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Abstract
The utility model provides an air source combined cycle refrigeration low-temperature heat pump machine set, which relates to an air source refrigeration heat pump machine set. The utility model is suitable for the refrigeration and the heating in the environment temperature range between 35 DGEC above zero and 30 DEG C below zero. Compared with a two-grade compression low-temperature heat pump machine set with the same low-temperature heating capacity, the utility model has small machine set size, is suitable for being used for various kinds of air conditioners such as central air conditioners, roof type air conditioners, unit type room air conditioners and the like, and is suitable for being combined into refrigeration and low-temperature heat pump multiple machines. The air source combined cycle refrigeration low-temperature heat pump machine set comprises two single-stage compression systems, which respectively work in corresponding temperature intervals for refrigeration, heating and low-temperature heating, wherein one system uses middle-pressure work media for realizing the refrigeration cycle refrigeration or realizing the heating in the relatively higher temperature interval, outputs the prepared cold or heat, and belongs to an output stage of the energy, the other system uses high-pressure work media for realizing the heating in the relatively lower temperature interval, transfers the prepared heat to the output stage, and belongs to a rising stage of the energy, and a combined cycle system is formed through coupling via a middle heat exchanger.
Description
Technical field:
The utility model relates to a kind of air source refrigerating heat pump unit.Particularly a kind of air source combination circularly cooling hot pump in low temp unit.
Background technology:
The refrigerating heat pump technology is along with the development of Refrigeration Technique and Compressor Technology constantly develops.
When kind of refrigeration cycle or heat pump cycle operation, have refrigerating function and heat pump heat-production functions simultaneously; Refrigerating function be kind of refrigeration cycle produce cold, be used for the technological means of living environment and production environment refrigeration air-conditioner; The heat pump heat-production functions is one and obtains heat from natural environment, is used for the heating of living environment and production environment and the technological means of heating air-conditioning.
Traditional refrigeration, source pump adopt the single stage compress circulatory system, be used for refrigerating and air-conditioning summer, be used for heat supply heating air conditioner winter, still, this heat pump can only use under the environmental condition more than-5 ℃ approximately in atmospheric environment, just can not use under the low again ambient temperature conditions.This is that admission pressure is low because under the low excessively condition of environment temperature, and the gas transmission coefficient of compressor is low, and pressure ratio is big; Inspiratory volume is big, and working medium quality internal circulating load is little, and heating capacity is little, and compression finishing temperature height influences compressor operation, and factor that the internal losses in the course of work is big or the like causes the coefficient of performance of unit low, and heating capacity is little, even causes compressor not run well.
Professional and technical personnel, professional factory have paid close attention to for many years to these problems that influence hot pump in low temp, did much to make great efforts and test for addressing these problems, for example make hot pump in low temp with compressor (what adopted at that time is piston type) with low temperature, though improved the air inlet situation of compressor when low temperature to a certain extent, but, the thing followed is a compression finishing temperature height, the inlet loss of worst hot case increases, the compression process internal losses increases or the like, and the problem that low-temperature heating capacity is little still can not solve.
And adopt the hot pump in low temp of helical-lobe compressor hydrojet, though the high problem of compression finishing temperature can solve, in the compressor operation internal losses big, the problem that low-temperature heating capacity is low still can not solve.Because the adaptability of helical-lobe compressor transformation ratio has certain restriction, the pressure of inspiration(Pi) of low temperature is low, and inspiratory volume is big, and the quality internal circulating load reduces with the reduction of temperature, heats little this intrinsic problem during low temperature and still exists.
The hot pump in low temp refrigeration unit is one and is operated in the different temperatures interval, reach the multi-functional unit of different application targets and requirement, it is different from the unit of simple function, take into account different service conditions, different application targets, the comprehensive problem that on multi-functional unit, occurs that solves.The experience of accumulation was worth using for reference with the method for dealing with problems during refrigeration machine was used, the single stage compress refrigeration, and two stages of compression system low temperature is good application example.
The patent No. is 03257752.4, denomination of invention is " a wide temperate zone air source heat pump refrigeration unit ", the patent No. is 200420029443.5, denomination of invention is the circulatory system of " severe cold areas air source heat pump refrigeration unit " two technology, after switching, can form the single stage compress circulatory system or the two stages of compression circulatory system, on same unit, can realize refrigeration, heat pump, the hot pump in low temp circulation can obtain corresponding practical effect.But its shortcoming is that low-pressure stage compressor cylinder volume is big, and the compressor volume is bigger.
The single machine two-stage hot pump in low temp that Japan made in 2005 was converted to twin-stage with the multi-joint machine of original single stage compress system and compresses multi-joint machine system in 2008.But it is big that its shortcoming remains low-pressure stage compressor volume displacement, and the compressor volume is bigger.
Present digital scroll compressor can be at worst cold case, turns round under the high pressure ratio condition.But it is big that Numeric Control Technology can not change the refrigerant vapor specific volume of hot pump in low temp under cryogenic conditions, the problem that working medium quality internal circulating load reduces, and environment temperature is lower, and heating capacity is littler.Like this, be enough to satisfy the refrigerating heat pump unit of refrigeration air-conditioner needs a summer, the heating capacity of heat pump in winter under cryogenic conditions can not satisfy the needs of heating.
Summary of the invention:
The utility model aims to provide a kind of air source combination circularly cooling hot pump in low temp unit.Be applicable to 35 ℃ to-30 ℃ interior refrigeration and the heating of ambient temperature range, it is compared with the two stages of compression hot pump in low temp unit of same low temperature heating capacity, the volume of unit is little, be applicable to central air-conditioning, various air-conditioning purposes such as roof top air-conditioner and modular room air conditioner are fit to be combined as refrigeration, the multi-joint machine of hot pump in low temp.
First kind of technical scheme of the present utility model is:
Comprise that two are operated in refrigeration respectively, heat that the single stage compress system of the corresponding temperature range of low-temperature heating is coupled to form the combination circulatory system through intermediate heat exchanger;
One of them system presses working medium in using, and realizes the kind of refrigeration cycle refrigeration, or is implemented in heating in the relative higher temperature interval, and with the cold or the heat output of producing, be the output stage of energy; Output stage comprises the A recycle compressor, A circulation indoor side heat exchanger, A is circulated throughout cooler, A circular chamber outside heat exchangers, A circulation cross valve, A circulating energy holder, A circulation expansion valve, A circulation electric heater and A circulation check valve, the A circulating electromagnetic valve connects into the single stage compress circulatory system with pipeline 24;
Another system uses high-pressure working medium, is implemented in the relatively low temperature range to heat, and with the heat transferred output stage of producing, is the lifting level of energy; Promote level and comprise the B recycle compressor, B circulation cross valve, B circulation heat recovery device, B circulation expansion valve, B circulation check valve, B circular chamber outside heat exchangers, B is circulated throughout cooler, B circulation expansion vessel, B recycle oil separator, B circulation electric heater, B circulating electromagnetic valve, B circulating temperature control valve connects into the single stage compress circulatory system with pipeline 24;
And the A circulatory system and the shared intermediate heat exchanger of the B circulatory system;
The cold that the output stage kind of refrigeration cycle is produced or heat the destination that the heat transferred produced of circulation needs cold or heat; Promote level and turn round when worst cold case, the heat from low temperature environment is obtained through promoting the heat that level promotes preparation, passes to output stage by intermediate heat exchanger, and by output stage heat is exported, and is used for heating, as shown in Figure 1.
Second kind of technical scheme compared with first kind of technical scheme, and difference is that outdoor heat exchanger does not have subcooler, and other structures are identical, and its technical scheme is:
Comprise that two are operated in refrigeration respectively, heat that the single stage compress system of the corresponding temperature range of low-temperature heating is coupled to form the combination circulatory system through intermediate heat exchanger;
One of them system presses working medium in using, and realizes the kind of refrigeration cycle refrigeration, or is implemented in heating in the relative higher temperature interval, and with the cold or the heat output of producing, be the output stage of energy; Output stage comprises the A recycle compressor, A circulation indoor side heat exchanger, A circular chamber outside heat exchangers, A circulation cross valve, A circulating energy holder, A circulation expansion valve, A circulation electric heater and A circulation check valve, the A circulating electromagnetic valve connects into the single stage compress circulatory system with pipeline 24;
Another system uses high-pressure working medium, is implemented in the relatively low temperature range to heat, and with the heat transferred output stage of producing, is the lifting level of energy; Promote level and comprise the B recycle compressor, B circulation cross valve, B circulation heat recovery device, B circulation expansion valve, B circulation check valve, B circular chamber outside heat exchangers, B circulation expansion vessel, B recycle oil separator, B circulation electric heater, the B circulating electromagnetic valve, B circulates temperature controlled valve connects into the single stage compress circulatory system with pipeline 24;
And the A circulatory system and the shared intermediate heat exchanger of the B circulatory system;
The cold that the output stage kind of refrigeration cycle is produced or heat the destination that the heat transferred produced of circulation needs cold or heat; Promote level and turn round when worst cold case, the heat from low temperature environment is obtained through promoting the heat that level promotes preparation, passes to output stage by intermediate heat exchanger, and by output stage heat is exported, and is used for heating, as shown in Figure 2.
Compressor of the present utility model can be positive displacement Piston Refrigerant Compreessor or positive displacement screw type refrigerating compressor or positive displacement rolling rotor type cold compressor or displacement vortex formula refrigeration compressor.
Expansion valve of the present utility model can be heating power expansion valve or electric expansion valve.
Output stage of the present utility model and lifting level can dispose with a kind of refrigeration compressor of pattern or the refrigeration compressor of different types.
Intermediate heat exchanger of the present utility model can be heat-exchangers of the plate type or tube-in-tube heat exchanger.
Indoor side heat exchanger of the present utility model can be finned type heat exchanger or the heat exchanger that is prepared heat-carrying or year cold medium by working medium by conducting heat.
First kind of technical scheme of the present utility model has three kinds of operating conditions:
1, the cooling operation state:
Have only output stage according to kind of refrigeration cycle to turn round in the time of need freezing summer, promotes level and be in stopped status, is the refrigeration work state.
2, heat pump environment early winter operating condition:
When early winter, environment need heat, have only output stage to turn round, promote level and be in stopped status according to heat pump cycle, for early winter low temperature environment heat duty.
3, heat pump ultra-low temperature surroundings operating condition:
When severe cold season need heat, output stage and lifting level were the duty that heats of ultra-low temperature surroundings simultaneously according to the heat pump cycle running.
Cooling operation state or heat operating condition and realize to switch by cross valve.Switch to the cooling operation state summer; Switch to the heat pump operating condition winter.
And environment early winter of heat pump heats or severe cold environment heats by controller realization switching.When unit was in the heat pump operating condition, when environment temperature was higher than the switching temperature of setting, controller turned round output stage separately according to heat pump cycle; When environment temperature was lower than the switching temperature of setting, controller made output stage and promotes level and moves according to heat pump cycle simultaneously.
Two kinds of auxiliary rotating states of combination circulation:
1, heat pump environment early winter heats the molten white operating condition of operating condition:
When having only output stage to turn round, for the output stage outdoor heat exchanger is realized molten frost according to heat pump cycle.
2, the molten white operating condition of heat pump ultra-low temperature surroundings operating condition:
When heat pump ultra-low temperature surroundings operating condition, realize molten frost for promoting the level outdoor heat exchanger.
To melt the molten frost running of white controller control, melt frost and finish, change the preceding operating condition of molten frost over to, run well.
The difference of second kind of technical scheme of the present utility model and first kind of technical scheme is that outdoor heat exchanger does not have subcooler, other structures are identical, therefore, the circular flow of the working medium of the operating condition of second kind of technical scheme and first kind of technical scheme, function, corresponding operating mode is to identical.
Because the outdoor heat exchanger of first kind of technical scheme has subcooler, therefore, make that its molten frost is fast, the coefficient of refrigerating performance in the kind of refrigeration cycle is better.And the outdoor heat exchanger of second kind of technical scheme does not have subcooler, therefore, makes it simple in structure, and cost is low.
The utility model is in the overall process of ultralow temperature operation, and service condition changes with the variation of ambient temperature, and promptly service condition is in the state of variable working condition; Unit is the some operating points under the variable working condition condition in the running status of metastable certain period.For guaranteeing security of operation and good operation characteristic, output stage should have different combinations with the lifting level on the different operating point of variable working condition; On the higher operating point of environment temperature, the internal circulating load that promotes level working medium should be lacked; In the lower operating point of environment temperature, promoting level working medium internal circulating load should be greatly; When moving under minimum ambient temperature conditions, the working medium internal circulating load that promotes level should be maximum.Such method of operation had both guaranteed the continuity of the off design performance of unit, had also adapted to the needs of heating demand.
The unit of configuration variable speed compressor in the operation period, when environment temperature is higher relatively, promotes stage compressor to move than the slow-speed of revolution in heat pump ultralow temperature operating mode; When environment temperature is relatively low, promotes level and move with higher rotation speed; When environment temperature is lower limit temperature, move with maximum speed.
If unit promotes the compressor of level configuration fixed rotating speed, can substitute the adjusting of compressor rotary speed in the mode that promotes the advancing of stage compressor, gland steam exhauster bypass.When environment temperature is higher relatively, bypass amount maximum; When environment temperature was relatively low, the bypass amount was more a little bit smaller; Environment temperature reaches minimum prescribes a time limit down, and the bypass amount is reduced to zero.
Adopt the variable speed compressor combination or adopt to promote stage compressor inlet and outlet bypass and regulate, keep heating under the cold environmental conditions stable, the continuity of off design performance is one of characteristics of the present utility model.
When the utility model moved according to heat pump ultralow temperature running status, the medium temperature of the intermediate heat exchanger of connection output stage, lifting level was higher, and heating capacity is healed greatly; When middle temperature reached the high evaporation temperature of output stage, it is maximum that its heating capacity reaches.Regulate to promote a level working medium internal circulating load, regulate the rotating speed that promotes stage compressor, change output stage, promote the ratio of stage compressor volume displacement, or corresponding with it output stage, promote the volumetric ratio of stage compressor, regulate heating capacity, possess good load adaptability.
The minimum environment temperature of the utility model ultralow temperature operating condition is-30 ℃, and corresponding minimum evaporating temperature can reach-40 ℃, can satisfy the needs of severe cold area.
Refrigerating capacity of the present utility model, heating capacity is roughly suitable, and when particularly turning round under low temperature or ultra-low temperature surroundings condition, heating capacity can be not less than heat pump metric system heat, a unit promptly can satisfy the instructions for use in winter, summer, is specially adapted to the user that the unit group is used.
The utility model can adopt hierarchical arrangement to promote stage compressor according to the difference of minimum environment temperature.Relatively low for minimum environment temperature, the compressor capacity that promotes level can be greatly; Higher relatively for minimum environment temperature, the compressor capacity that promotes level can be smaller.Save cost, give full play to investment effect.
Lifting level of the present utility model adopts high-pressure working medium.It is little to promote level suction condition specific volume, and cylinder capacity is little, and volume is little, and is in light weight, and cost is low.
The utlity model has good molten white function, molten frost is thorough, and the time is short.
The utility model adopts the spare part in common use of present air conditioner product, presses high-pressure working medium during working medium adopts.
In sum, the utility model is a kind of air source combination circularly cooling hot pump in low temp unit.Be applicable to 35 ℃ to-30 ℃ interior refrigeration and the heating of ambient temperature range, it is compared with the two stages of compression hot pump in low temp unit of same low temperature heating capacity, the volume of unit is little, be applicable to central air-conditioning, various air-conditioning purposes such as roof top air-conditioner and modular room air conditioner are fit to be combined as refrigeration, the multi-joint machine of hot pump in low temp.
Description of drawings
The circulation process schematic diagram of Fig. 1 technical solutions of the utility model 1.
The circulation process schematic diagram of Fig. 2 technical solutions of the utility model 2.
Wherein:
The 1-A recycle compressor, 2-A circulation indoor side heat exchanger, 3-A circulation cross valve, 4a-A circulation expansion valve, 4b-A circulation expansion valve, 4c-A circulation expansion valve, 5-A circulating energy holder, 6-A circulation check valve, 7a-A circulating electromagnetic valve, the 7b-A circulating electromagnetic valve, 7c-A circulating electromagnetic valve, 7d-A circulating electromagnetic valve, 8-A circulation electric heater, 9-A circular chamber outside heat exchangers, 10-A is circulated throughout cooler, the 11-B recycle compressor, 12-B circulation cross valve, 13-B circulation heat recovery device, 14-B circulation expansion valve, 15-B circulation check valve, 16-B circular chamber outside heat exchangers, 17-B is circulated throughout cooler, 18-B circulation expansion vessel, 19-B recycle oil separator, 20-B circulation electric heater, 21a-B circulating electromagnetic valve, the 21b-B circulating electromagnetic valve, the 22-intermediate heat exchanger, 23-B circulating temperature control valve, 24-pipeline 24.
The specific embodiment:
Embodiment 1
Adopt spare part in common use and general middle pressure, the high-pressure working medium of present air conditioner, make the utility model according to first kind of technical scheme of the made the utility model of Fig. 1 at the system product.
Constitute the unit flowage structure by two single stage compress systems, one of them is the output stage of energy, and another system is the lifting level of energy; Be formed by connecting with pipeline 24 through intermediate heat exchanger 22 couplings.
The structure of output stage is: the outlet of A recycle compressor 1 is connected with pipeline 24 with the import of A circulation cross valve 3; The outlet of A circulation cross valve 3 is connected with pipeline 24 with 2 imports of A circulation indoor side heat exchanger; The outlet of A circulation indoor side heat exchanger 2 is connected with pipeline 24 with the import of A circulation electric heater 8; The outlet of A circulation electric heater 8 is connected with pipeline 24 with A circulation expansion valve 4a, A circulating electromagnetic valve 7c respectively; A circulation expansion valve 4a, A circulating electromagnetic valve 7c are connected with pipeline 24 with A circulating energy holder 5 respectively; 5 outlets of A circulating energy holder are connected with pipeline 24 with intermediate heat exchanger 22 through A circulation expansion valve 4c; Through A circulating electromagnetic valve 7a, 3 imports of A circulation cross valve connect with pipeline 24; A circulation cross valve 3 connects with A recycle compressor 1, forms a loop.
More than explanation is the example narration with the A circulation hot pump in low temp flow direction.
Another loop be A circulation expansion valve 4a, A circulating electromagnetic valve 7c respectively with A circulating electromagnetic valve 7d, A circulating energy holder 5 connects with pipeline 24; 5 outlets of A circulating electromagnetic valve 7d and A circulating energy holder merge, after the A of A circular chamber outside heat exchangers 9 belows is circulated throughout cooler 10 respectively with A circulation check valve 6, A circulation expansion valve 4b connects with pipeline 24; A circulation check valve 6 merges with A circulation expansion valve 4b, enters A circular chamber outside heat exchangers 9 with pipeline 24; Merging the back with A circulating electromagnetic valve 7a outlet behind A circulating electromagnetic valve 7b is connected with pipeline 24 with 3 imports of A circulation cross valve; A circulation cross valve 3 connects into the loop with A recycle compressor 1 with pipeline 24.
More than explanation is the example narration with the A circulating heat pump flow direction.
The structure that promotes level is:
The outlet of B recycle compressor 11 is connected with pipeline 24 with the import of B recycle oil separator 19; The outlet of B recycle oil separator 19 is connected with pipeline 24 with import with B circulation cross valve 12; The outlet of B circulation cross valve 12 links to each other with the import of intermediate heat exchanger 22; The outlet of intermediate heat exchanger 22 is connected with pipeline 24 with B circulation electric heater 20; B circulation electric heater 20 is connected with pipeline 24 with B circulation heat recovery device 13; B circulation heat recovery device 13 connects B circulating electromagnetic valve 21a with pipeline 24; B circulating electromagnetic valve 21a is connected with pipeline 24 with the subcooler 17 of B circular chamber outside heat exchangers 16 belows; Subcooler 17 is connected with pipeline 24 with B circulation expansion valve 14, B circulation check valve 15 respectively; The other end of B circulation expansion valve 14, B circulation check valve 15 merges, and is connected with pipeline 24 with B circular chamber outside heat exchangers 16; Another interface of B circular chamber outside heat exchangers 16 is connected with pipeline 24 with B circulation heat recovery device 13; Another interface of B circulation heat recovery device 13 connects the import of B circulation cross valve 12 with pipeline 24; The low-pressure side interface of B circulation cross valve 12 links to each other with the import of B recycle compressor 11, forms a closed circuit.
A standby bypass circulation is set, series connection one B circulating temperature control valve 23 in the loop between the import and export of B recycle compressor 11; The low-pressure side of B recycle oil separator 19, B recycle compressor 11 is provided with oil return pipe; B circulation heat recovery device 13, B circulating electromagnetic valve 21a two ends are provided with parallel pipeline, series connection B circulating electromagnetic valve 21b in parallel pipeline; B circulation expansion vessel 18 is connected to the low-pressure side of the steam (vapor) outlet of B circular chamber outside heat exchangers 16 with pipeline 24.
Energy output stage and energy lift level connect to form the utility model by intermediate heat exchanger 22 couplings.
Refrigerating capacity of the present utility model, heating capacity, ultralow temperature heating capacity are roughly suitable, severe cold season particularly, and heat pump does not have the heating capacity relaxation phenomenon when the ultralow temperature operating mode turns round.Use a machine can satisfy the winter, use summer, unit volume is little, and cost is low.
Running is:
The cooling operation state:
Summer, the cooling operation state had only the output stage running, promoted level and stopped.A circulation cross valve 3 is in refrigerating state, and A circulation indoor side heat exchanger 2 can be the heat exchanger of direct sweat cooling, can be in order to the condensation heat supply in the winter time, or in order to prepare the heat exchanger of catalyst carrier or refrigerating medium.A circular chamber outside heat exchangers 9 is as the condenser of kind of refrigeration cycle.
During kind of refrigeration cycle, compress the high temperature and high pressure steam of output through A circulation cross valve 3 through A recycle compressor 1, A circulating electromagnetic valve 7b, enter A circular chamber outside heat exchangers 9 and carry out condensation, after emitting condensation heat, be condensed into highly pressurised liquid, through A circulation check valve 6, it is cold excessively that A is circulated throughout cooler 10, and supercooled liquid is through A circulating energy holder 5, and the 4a throttling of A circulation expansion valve is after A circulation electric heater 8, enter A circulation indoor side heat exchanger 2 sweat coolings again, the steam that evaporation forms is sucked by A recycle compressor 1, discharges after compression, circulates again and again.During kind of refrigeration cycle, other A circulating electromagnetic valves 7a, 7c, 7d close, and A circulation electric heater 8 does not heat.
Heat pump operating condition early winter:
Operating condition early winter of heat pump also comprises the running status in early spring winter Mo, has only the output stage running.Change output stage into when environment temperature is higher than the output stage individual operation, when promoting the transformation switching temperature of level running simultaneously, have only the output stage running, promote level and stop.
Heat pump is when early winter, operating condition was moved, and A circulation cross valve 3 is in the operation of heat pump state, and A circulation indoor side heat exchanger 2 discharges the heat that heat pump is produced as the condenser of output stage.According to the difference of heat-supplying mode, A circulation indoor side heat exchanger 2 can be direct heat exchanger to the room of heat supply release heat, also can be by the heat exchanger of heat medium to the room heat supply.A circular chamber outside heat exchangers 9 is the output stage evaporimeter of this running status, during operation from atmosphere draw heat.
During running, the high pressure high temperature vapor of exporting through A recycle compressor 1 compression back enters A circulation indoor side heat exchanger 2 through A circulation cross valve 3, is condensed into highly pressurised liquid after emitting condensation heat.Highly pressurised liquid is through A circulation electric heater 8, A circulating electromagnetic valve 7c, A circulating energy holder 5, A is circulated throughout cooler 10, after the A circulation expansion valve 4b throttling, enters A circular chamber outside heat exchangers 9, through the heat absorption evaporation, the steam that evaporation forms is through A circulating electromagnetic valve 7b, and A circulation cross valve 3 enters A recycle compressor 1, and circulation repeats.Early winter, other A circulating electromagnetic valves 7a closed during operating condition, and A circulating electromagnetic valve 7d closes, and A circulation electric heater 8 does not heat.
Heat pump ultralow temperature operating condition:
When environment temperature is lower than output stage, when promoting the transformation switching temperature that level whether turn round simultaneously, output stage, promotes level and turn round simultaneously.
At this moment, heat pump is in the ultralow temperature running status, A circulation cross valve 3, and B circulation cross valve 12 is in the heat pump cycle running status, enables the evaporimeter of intermediate heat exchanger 22 as output stage, and A circular chamber outside heat exchangers 9 is in closes dead status; Open A circulating electromagnetic valve 7a, close A circulating electromagnetic valve 7b.During the output stage running, working medium is through 1 compression of A recycle compressor, the high temperature and high pressure steam of output enters A circulation indoor side heat exchanger 2 through A circulation cross valve 3, after emitting condensation heat, be condensed into highly pressurised liquid, through A circulation electric heater 8, A circulating electromagnetic valve 7c, A circulating energy holder 5 enters intermediate heat exchanger 22 heat absorption evaporations after A circulation expansion valve 4c throttling.The low-pressure steam that evaporation forms is through A circulating electromagnetic valve 7a, and A circulation cross valve 3 enters the 1 compression back output of A recycle compressor, has finished once circulation, goes round and begins again.In the ultralow temperature running status, A circulation electric heater 8 no powers are in off position, and A circulating electromagnetic valve 7d and A circulating electromagnetic valve 7b close, and A circular chamber outside heat exchangers 9 is in off position.
Output stage and the operation simultaneously of lifting level are to guarantee safety, and output stage should have interlock with the lifting level, and when having only the output stage operation, promoting level could turn round, and the lifting level must not individual operation.
When promoting the level operation, the high temperature and high pressure steam that discharge B recycle compressor 11 compression backs is through B recycle oil separator 19, B circulation cross valve 12, enter intermediate heat exchanger 22, the liquid that forms after the condensation is through B circulation electric heater 20, B circulation heat recovery device 13, B circulating electromagnetic valve 21a, B is circulated throughout cooler 17, after 14 throttlings of B circulation expansion valve, enter B circular chamber outside heat exchangers 16, evaporate behind the heat of absorption chamber external environment, the steam that evaporation forms is via B circulation heat recovery device 13, get back to B recycle compressor 11 behind the B circulation cross valve 12, discharge after compression again, circulation goes round and begins again.
When promoting the level operation, the condensation heat of emitting in intermediate heat exchanger 22 passes to output stage, makes the evaporation of output stage liquid.The final realization obtained heat from low temperature environment, together with the mechanical equivalent of heat heat of output stage, lifting level wasted work, to the place's heating of heating purpose.
The B circulation expansion vessel 18 that promotes level prevents to promote level usefulness of hypertonia in the system when stopped status.
A circulating energy holder 5 is used to regulate refrigerating state, heat pump running status early winter, and three kinds of different running statuses of heat pump ultralow temperature running status require to have the working medium charging amount of three kinds of different participation circulations, and make it to be adjusted voluntarily.Only in this way could can normally move separately when the running status conversion, be the necessary equipment of realizing three kinds of different running statuses.
Molten frost
1, the molten frost of heat pump operating condition early winter
Have only the output stage operation of combination circulation during heat pump operating condition early winter, the lifting level of combination circulation is in stopped status.The frosting on surface when melting A circular chamber outside heat exchangers 9 as evaporimeter.
A circulation cross valve 3 switches to the refrigerating operaton state when melting frost, A circulating electromagnetic valve 7b, and 7d, 7c is open-minded, and A circulating electromagnetic valve 7a closes, the 8 energising heating of A circulation electric heater.1 of A recycle compressor plays the effect of transferring working medium under compressive state not in the defrosting process, from the steam of A recycle compressor 1 output through A circulation cross valve 3, A circulating electromagnetic valve 7b enters A circular chamber outside heat exchangers 9, emit heat and condense into liquid, make the frosting fusing on A circular chamber outside heat exchangers 9 surfaces.The working medium that condenses into liquid is through A circulation check valve 6, A is circulated throughout cooler 10, A circulating electromagnetic valve 7d, A circulating electromagnetic valve 7c, enter A circulation electric heater 8, endothermic gasification becomes steam in A circulation electric heater 8, passes through A circulation indoor side heat exchanger 2 again, and A circulation cross valve 3 is got back to A recycle compressor 1.Circulation so constantly is till the frosting on A circular chamber outside heat exchangers 9 surfaces has been melted.After finishing, molten frost changes heat pump cycle over to.
The molten frost of output stage can also be common hot vapour defrost method carry out defrosting, but indoor temperature change generated in case is obvious; The indoor temperature of electrical heating defrost method is stable.
2, the molten frost of heat pump ultralow temperature operating condition
The molten frost of heat pump ultralow temperature operating condition refers to 16 frostings as the outdoor evaporator surface that promotes level of fusing B circular chamber outside heat exchangers.
Molten frost is preceding according to heat pump ultralow temperature operating condition, output stage, the running simultaneously of lifting level.Enter molten when frost of ultralow temperature operating condition, output stage is shut down, and the B circulation cross valve 12 that promotes level switches to the defrosting state by the heat pump operating condition, is equivalent to cold, warming-up group and switches to refrigerating state by the heat pump state.The gas of B recycle compressor 11 output is through B recycle oil separator 19, B circulation cross valve 12, and B circulation heat recovery device 13 enters B circular chamber outside heat exchangers 16, emits the liquefaction of condensing behind the heat, and the frosting on B circular chamber outside heat exchangers 16 surfaces is melted.Liquid is through B circulation check valve 15, B is circulated throughout cooler 17, B circulating electromagnetic valve 21b enters B circulation electric heater 20, vaporizes through B circulation electric heater 20 heating evaporations, gas is through intermediate heat exchanger 22, behind the B circulation cross valve 12, get back to B recycle compressor 11, finish the once circulation of defrosting, so molten frost circulation is continuous, till the frosting fusing of finishing B circular chamber outside heat exchangers 16 surfaces.Changing the ultralow temperature operating condition over to by controller control runs well.In the molten white process, B circulating electromagnetic valve 21a closes.
Adopt spare part in common use and general middle pressure, the high-pressure working medium of present air conditioner, make the utility model according to second kind of technical scheme of the made the utility model of Fig. 2 at the system product.
Constitute the unit flowage structure by two single stage compress systems, one of them is the output stage of energy, and another system is the lifting level of energy; Be formed by connecting with pipeline 24 through intermediate heat exchanger 22 couplings.
The structure of output stage is: the outlet of A recycle compressor 1 is connected with pipeline 24 with the import of A circulation cross valve 3; The outlet of A circulation cross valve 3 is connected with pipeline 24 with 2 imports of A circulation indoor side heat exchanger; The outlet of A circulation indoor side heat exchanger 2 is connected with pipeline 24 with the import of A circulation electric heater 8; The outlet of A circulation electric heater 8 is connected with pipeline 24 with A circulation expansion valve 4a, A circulating electromagnetic valve 7c respectively; A circulation expansion valve 4a, A circulating electromagnetic valve 7c are connected with pipeline 24 with A circulating energy holder 5 respectively; 5 outlets of A circulating energy holder are connected with pipeline 24 with intermediate heat exchanger 22 through A circulation expansion valve 4c; Through A circulating electromagnetic valve 7a, 3 imports of A circulation cross valve connect with pipeline 24; A circulation cross valve 3 is connected with A recycle compressor 1, forms a loop.
More than explanation is the example narration with the A circulation hot pump in low temp flow direction.
Another loop is that A circulation expansion valve 4a, A circulating electromagnetic valve 7c merge and A circulating electromagnetic valve 7d, and A circulating energy holder 5 connects with pipeline 24; 5 outlets of A circulating electromagnetic valve 7d and A circulating energy holder merge, more respectively with A circulation check valve 6, A circulation expansion valve 4b connects with pipeline 24; A circulation check valve 6 merges with A circulation expansion valve 4b, is connected with pipeline 24 with 9 imports of A circular chamber outside heat exchangers; 9 outlets of A circular chamber outside heat exchangers merge with the outlet of pipeline 24 through A circulating electromagnetic valve 7b and A circulating electromagnetic valve 7a, and are connected with pipeline 24 with 3 imports of A circulation cross valve; A circulation cross valve 3 connects into the loop with A recycle compressor 1 with pipeline 24.
More than explanation is the example narration with the A circulating heat pump flow direction.
The structure that promotes level is:
The outlet of B recycle compressor 11 is connected with pipeline 24 with the import of B recycle oil separator 19; The outlet of B recycle oil separator 19 is connected with pipeline 24 with import with B circulation cross valve 12; The outlet of B circulation cross valve 12 is connected with pipeline 24 with the import of intermediate heat exchanger 22; The outlet of intermediate heat exchanger 22 is connected with pipeline 24 with B circulation electric heater 20; B circulation electric heater 20 is connected with pipeline 24 with B circulation heat recovery device 13; B circulation heat recovery device 13 connects B circulating electromagnetic valve 21a with pipeline 24; B circulating electromagnetic valve 21a is connected with pipeline 24 with B circulation expansion valve 14, B circulation check valve 15 respectively; The other end of B circulation expansion valve 14, B circulation check valve 15 merges, and is connected with pipeline 24 with B circular chamber outside heat exchangers 16; Another interface of B circular chamber outside heat exchangers 16 is connected with pipeline 24 with B circulation heat recovery device 13; Another interface of B circulation heat recovery device 13 connects the import of B circulation cross valve 12 with pipeline 24; The low-pressure side interface of B circulation cross valve 12 links to each other with the import of B recycle compressor 11, forms a closed circuit.
A standby bypass circulation is set, series connection B circulating temperature control valve 23 in the loop between the import and export of B recycle compressor 11; The low-pressure side of B recycle oil separator 19, B recycle compressor 11 is provided with return line 24; B circulation heat recovery device 13, B circulating electromagnetic valve 21a two ends are provided with parallel pipeline 24, series connection B circulating electromagnetic valve 21b in parallel pipeline 24; B circulation expansion vessel 18 is connected to the low-pressure side of the steam (vapor) outlet of B circular chamber outside heat exchangers 16 with pipeline 24.
Energy output stage and energy lift level connect to form the utility model by intermediate heat exchanger 22 couplings.
Running is identical with embodiment 1, and the difference of embodiment 2 and embodiment 1 is that outdoor heat exchanger does not have that A is circulated throughout cooler and B is circulated throughout cooler, and other structures are identical.Therefore, embodiment 1 molten frost is fast, and the coefficient of refrigerating performance in the kind of refrigeration cycle is better, and embodiment 2 is simple in structure, and cost is low.
Claims (9)
1. an air source combination circularly cooling hot pump in low temp unit is characterized in that comprising that two are operated in refrigeration respectively, heats, and the single stage compress system of the corresponding temperature range of low-temperature heating is coupled to form the combination circulatory system through intermediate heat exchanger;
Wherein, the output stage of the A circulatory system comprises the A recycle compressor, A circulation indoor side heat exchanger, A is circulated throughout cooler, A circular chamber outside heat exchangers, A circulation cross valve, A circulating energy holder, A circulation expansion valve, A circulation electric heater and A circulation check valve, the A circulating electromagnetic valve connects into the single stage compress circulatory system with pipeline;
The lifting level of B circulation comprises the B recycle compressor, B circulation cross valve, B circulation heat recovery device, B circulation expansion valve, B circulation check valve, B circular chamber outside heat exchangers, B is circulated throughout cooler, B circulation expansion vessel, B recycle oil separator, B circulation electric heater, B circulating electromagnetic valve, B circulating temperature control valve connects into the single stage compress circulatory system with pipeline;
And the A circulatory system and the shared intermediate heat exchanger of the B circulatory system.
2. according to the described air of claim 1 source combination circularly cooling hot pump in low temp unit, it is characterized in that constituting the unit flowage structure by two single stage compress systems, one of them is the output stage of energy, and another system is the lifting level of energy; Be formed by connecting with pipeline through the intermediate heat exchanger coupling, wherein:
The structure of output stage is: the outlet of A recycle compressor is connected with pipeline with the import of A circulation cross valve; The outlet of A circulation cross valve is connected with pipeline with the inboard heat exchanger inlets of A circular chamber; The outlet of A circulation indoor side heat exchanger is connected with pipeline with the import of A circulation electric heater; The outlet of A circulation electric heater is connected with pipeline with A circulation expansion valve, A circulating electromagnetic valve respectively; A circulation expansion valve, A circulating electromagnetic valve are connected with pipeline with A circulating energy holder respectively; The outlet of A circulating energy holder is connected with pipeline with intermediate heat exchanger through A circulation expansion valve; Through the A circulating electromagnetic valve, the import of A circulation cross valve connects with pipeline; A circulation cross valve connects with the A recycle compressor, forms a loop;
Another loop be A circulation expansion valve, A circulating electromagnetic valve respectively with the A circulating electromagnetic valve, A circulating energy holder connects with pipeline; The outlet of A circulating electromagnetic valve and A circulating energy holder merges, after the A of A circular chamber outside heat exchangers below is circulated throughout cooler respectively with A circulation check valve, A circulation expansion valve connects with pipeline; A circulation check valve and A circulation expansion valve merge, and enter A circular chamber outside heat exchangers with pipeline; Merging the back with the outlet of A circulating electromagnetic valve behind the A circulating electromagnetic valve is connected with pipeline with the import of A circulation cross valve; A circulation cross valve and A recycle compressor connect into the loop with pipeline;
The structure that promotes level is: the outlet of B recycle compressor is connected with pipeline with the import of B recycle oil separator; The outlet of B recycle oil separator is connected with pipeline with import with B circulation cross valve; The outlet of B circulation cross valve links to each other with the import of intermediate heat exchanger; The outlet of intermediate heat exchanger is connected with pipeline with B circulation electric heater; B circulation electric heater is connected with pipeline with B circulation heat recovery device; B circulation heat recovery device connects the B circulating electromagnetic valve with pipeline; The B circulating electromagnetic valve is connected with pipeline with the subcooler of B circular chamber outside heat exchangers below; Subcooler is connected with pipeline with B circulation expansion valve, B circulation check valve respectively; The other end of B circulation expansion valve, B circulation check valve merges, and is connected with pipeline with B circular chamber outside heat exchangers; Another interface of B circular chamber outside heat exchangers is connected with pipeline with B circulation heat recovery device; Another interface of B circulation heat recovery device connects the import of B circulation cross valve with pipeline; The low-pressure side interface of B circulation cross valve links to each other with the import of B recycle compressor, forms a closed circuit;
A standby bypass circulation is set, series connection one B circulating temperature control valve in the loop between the import and export of B recycle compressor; The low-pressure side of B recycle oil separator, B recycle compressor is provided with oil return pipe; B circulation heat recovery device, B circulating electromagnetic valve two ends are provided with parallel pipeline, series connection B circulating electromagnetic valve in parallel pipeline; B circulation expansion vessel is connected to the low-pressure side of the steam (vapor) outlet of B circular chamber outside heat exchangers with pipeline.
3. an air source combination circularly cooling hot pump in low temp unit is characterized in that comprising that two are operated in refrigeration respectively, heats, and the single stage compress system of the corresponding temperature range of low-temperature heating is coupled to form the combination circulatory system through intermediate heat exchanger;
Wherein, the output stage of the A circulatory system comprises the A recycle compressor, A circulation indoor side heat exchanger, A circular chamber outside heat exchangers, A circulation cross valve, A circulating energy holder, A circulation expansion valve, A circulation electric heater and A circulation check valve, the A circulating electromagnetic valve connects into the single stage compress circulatory system with pipeline;
The lifting level of the B circulatory system comprises the B recycle compressor, B circulation cross valve, B circulation heat recovery device, B circulation expansion valve, B circulation check valve, B circular chamber outside heat exchangers, B circulation expansion vessel, B recycle oil separator, B circulation electric heater, the B circulating electromagnetic valve, B circulates temperature controlled valve connects into the single stage compress circulatory system with pipeline;
And the A circulatory system and the shared intermediate heat exchanger of the B circulatory system.
4. according to the described air of claim 3 source combination circularly cooling hot pump in low temp unit, it is characterized in that constituting the unit flowage structure by two single stage compress systems, one of them is the output stage of energy, and another system is the lifting level of energy; Be formed by connecting with pipeline through the intermediate heat exchanger coupling, wherein:
The structure of output stage is: the outlet of A recycle compressor is connected with pipeline with the import of A circulation cross valve; The outlet of A circulation cross valve is connected with pipeline with the inboard heat exchanger inlets of A circular chamber; The outlet of A circulation indoor side heat exchanger is connected with pipeline with the import of A circulation electric heater; The outlet of A circulation electric heater is connected with pipeline with A circulation expansion valve, A circulating electromagnetic valve respectively; A circulation expansion valve, A circulating electromagnetic valve are connected with pipeline with A circulating energy holder respectively; The outlet of A circulating energy holder is connected with pipeline with intermediate heat exchanger through A circulation expansion valve; Through the A circulating electromagnetic valve, the import of A circulation cross valve connects with pipeline; A circulation cross valve is connected with the A recycle compressor, forms a loop;
Another loop is that A circulation expansion valve, A circulating electromagnetic valve merge and the A circulating electromagnetic valve, and A circulating energy holder connects with pipeline; The outlet of A circulating electromagnetic valve and A circulating energy holder merges, more respectively with A circulation check valve, A circulation expansion valve connects with pipeline; A circulation check valve and A circulation expansion valve merge, and are connected with pipeline with the import of A circular chamber outside heat exchangers; The outlet of A circular chamber outside heat exchangers merges with the outlet of pipeline through A circulating electromagnetic valve and A circulating electromagnetic valve, and is connected with pipeline with the import of A circulation cross valve; A circulation cross valve and A recycle compressor connect into the loop with pipeline;
The structure that promotes level is: the outlet of B recycle compressor is connected with pipeline with the import of B recycle oil separator; The outlet of B recycle oil separator is connected with pipeline with import with B circulation cross valve; The outlet of B circulation cross valve is connected with pipeline with the import of intermediate heat exchanger; The outlet of intermediate heat exchanger is connected with pipeline with B circulation electric heater; B circulation electric heater is connected with pipeline with B circulation heat recovery device; B circulation heat recovery device connects the B circulating electromagnetic valve with pipeline; The B circulating electromagnetic valve is connected with pipeline with B circulation expansion valve, B circulation check valve respectively; The other end of B circulation expansion valve, B circulation check valve merges, and is connected with pipeline with B circular chamber outside heat exchangers; Another interface of B circular chamber outside heat exchangers is connected with pipeline with B circulation heat recovery device; Another interface of B circulation heat recovery device connects the import of B circulation cross valve with pipeline; The low-pressure side interface of B circulation cross valve links to each other with the import of B recycle compressor, forms a closed circuit;
A standby bypass circulation is set, series connection B circulating temperature control valve in the loop between the import and export of B recycle compressor; The low-pressure side of B recycle oil separator, B recycle compressor is provided with return line; B circulation heat recovery device, B circulating electromagnetic valve two ends are provided with parallel pipeline, series connection B circulating electromagnetic valve in parallel pipeline; B circulation expansion vessel is connected to the low-pressure side of the steam (vapor) outlet of B circular chamber outside heat exchangers with pipeline.
5. according to claim 1 or 3 described air sources combination circularly cooling hot pump in low temp unit, it is characterized in that compressor is positive displacement Piston Refrigerant Compreessor or positive displacement screw type refrigerating compressor or positive displacement rolling rotor type cold compressor or displacement vortex formula refrigeration compressor.
6. according to claim 1 or 3 described air sources combination circularly cooling hot pump in low temp unit, it is characterized in that expansion valve is heating power expansion valve or electric expansion valve.
7. according to claim 1 or 3 described air sources combination circularly cooling hot pump in low temp unit, it is characterized in that output stage and promote the refrigeration compressor of same kind of pattern of level configuration or the refrigeration compressor of different types.
8. according to claim 1 or 3 described air sources combination circularly cooling hot pump in low temp unit, it is characterized in that intermediate heat exchanger is heat-exchangers of the plate type or tube-in-tube heat exchanger.
9. according to claim 1 or 3 described air sources combination circularly cooling hot pump in low temp unit, it is characterized in that indoor side heat exchanger is finned type heat exchanger or the heat exchanger that is prepared heat-carrying or year cold medium by working medium by conducting heat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920095594 CN201508074U (en) | 2009-02-19 | 2009-02-19 | Air source combined cycle refrigeration low-temperature heat pump machine set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200920095594 CN201508074U (en) | 2009-02-19 | 2009-02-19 | Air source combined cycle refrigeration low-temperature heat pump machine set |
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| CN201508074U true CN201508074U (en) | 2010-06-16 |
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| CN 200920095594 Expired - Fee Related CN201508074U (en) | 2009-02-19 | 2009-02-19 | Air source combined cycle refrigeration low-temperature heat pump machine set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620362A (en) * | 2012-03-27 | 2012-08-01 | 美的集团有限公司 | Low-temperature strong-heat multi-split air conditioning system |
| CN104075486A (en) * | 2013-03-26 | 2014-10-01 | 株式会社信佑综合能量 | Apparatus for dual heat pump |
| CN106610145A (en) * | 2015-10-21 | 2017-05-03 | 青岛海尔新能源电器有限公司 | Air source heat pump heating system and control method thereof |
-
2009
- 2009-02-19 CN CN 200920095594 patent/CN201508074U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620362A (en) * | 2012-03-27 | 2012-08-01 | 美的集团有限公司 | Low-temperature strong-heat multi-split air conditioning system |
| CN102620362B (en) * | 2012-03-27 | 2015-07-15 | 美的集团股份有限公司 | Low-temperature strong-heating multi-split system |
| CN104075486A (en) * | 2013-03-26 | 2014-10-01 | 株式会社信佑综合能量 | Apparatus for dual heat pump |
| CN104075486B (en) * | 2013-03-26 | 2018-02-23 | 株式会社信佑综合能量 | Binary heat pump assembly |
| CN106610145A (en) * | 2015-10-21 | 2017-05-03 | 青岛海尔新能源电器有限公司 | Air source heat pump heating system and control method thereof |
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Granted publication date: 20100616 Termination date: 20140219 |