CN109945292A - Double heat source two stages of compression heat pump hot-water systems and method with auxiliary compressor - Google Patents
Double heat source two stages of compression heat pump hot-water systems and method with auxiliary compressor Download PDFInfo
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Abstract
The present disclosure proposes double heat source two stages of compression heat pump hot-water systems and method with auxiliary compressor, double heat source evaporators include air-source evaporator and soil source evaporator；The refrigerant of the air-source evaporator outlet reaches soil source evaporating pressure after the boosting of low-pressure stage compressor, and mixes with the refrigerant of soil source evaporator outlet, enters high pressure stage compressor together later；Hot water heating process is completed in the heat release in gas cooler of the compressed refrigerant of high pressure stage compressor, and refrigerant is flowed out from gas cooler enters gas-liquid separator after throttling；The vapor phase refrigerant of the gas-liquid separator outlet is directly over auxiliary compressor and is compressed to gas cooler pressure, and liquid phase refrigerant enters evaporator link, absorbs heat from air and soil respectively, recycles so as to form one.
Description
Technical field
This disclosure relates to refrigeration technology field, more particularly to double heat source two stages of compression heat-pump hot-waters with auxiliary compressor
System and method.
Background technique
Current era, with the continuous aggravation of people's living standard increasingly improved with energy crisis, to the reasonable of the energy
Effective use is the theme of the world today.In house there are also industry and commerce field, Teat pump boiler due to its good energy saving property, technology at
Ripe advantage is the hot spot applied and studied at this stage.Heat pump system can on the basis of consuming less high-grade energy,
Low-grade energy in air perhaps soil is transformed into water to the effective use for realizing natural resources or waste heat, is to subtract
Few energy waste improves the effective ways of efficiency of energy utilization.
The heat pump system being widely used at present is mostly air source heat pump and soil source heat pump.Air source heat pump is due to its structure
Simply, the advantages that easy for installation is the hot spot applied at present.
Inventor has found in actual operation, and when environment temperature is lower in winter, air source heat pump is difficult to meet for example
The big heating load demand of commercial water heater.Earth source heat pump can provide biggish heat supply, and heat capacity is relatively stable.But
It is that earth source heat pump installation and maintenance difficult, economic input is larger, has higher standard and limitation to the construction of heat pump system,
Obstacle is increased for its large-scale use.
In conclusion traditional heat pump system efficiency is not high and disadvantage is more obvious, although with traditional electric heating equipment phase
Than with certain energy-saving effect, but there are also biggish rooms for promotion.Heat pump system works in lower environment temperature, by
In operating pressure height, restriction loss is big, and efficiency is lower, needs to propose corrective measure.So optimizing and rising to heat pump system
Grade is the emphasis studied at present.
Summary of the invention
The first purpose of this specification embodiment is to provide double heat source two stages of compression heat-pump hot-waters with auxiliary compressor
System, the heat pump system can absorb heat from air and soil simultaneously, increase the environmental suitability of system, and with auxiliary
Help the intercooled system constituting method of the two stages of compression of compressor that can improve energy benefit with the Energy Efficiency Ratio of biggish lifting system
With rate.
This specification embodiment provides double heat source two stages of compression heat pump hot-water systems with auxiliary compressor, wherein double
Heat source evaporator includes air-source evaporator and soil source evaporator；
The refrigerant of the air-source evaporator outlet reaches soil source evaporating pressure after the boosting of low-pressure stage compressor,
And mixed with the refrigerant of soil source evaporator outlet, enter high pressure stage compressor together later；
Hot water heating process, refrigerant are completed in the heat release in gas cooler of the compressed refrigerant of high pressure stage compressor
Enter gas-liquid separator after throttling from gas cooler outflow；
The vapor phase refrigerant of the gas-liquid separator outlet is directly over auxiliary compressor and is compressed to gas cooler pressure,
Liquid phase refrigerant enters evaporator link, absorbs heat from air and soil respectively, recycles so as to form one.
This specification embodiment also provides the work of double heat source two stages of compression heat pump hot-water systems with auxiliary compressor
Method, comprising:
The refrigerant of air-source evaporator outlet reaches soil source evaporating pressure after the boosting of low-pressure stage compressor, and with
The refrigerant of soil source evaporator outlet mixes, and enters high pressure stage compressor together later；
Hot water heating process, refrigerant are completed in the heat release in gas cooler of the compressed refrigerant of high pressure stage compressor
Enter gas-liquid separator after throttling from gas cooler outflow；
The vapor phase refrigerant of gas-liquid separator outlet is directly over auxiliary compressor and is compressed to gas cooler pressure, liquid phase
Refrigerant enters evaporator link, absorbs heat from air and soil respectively, recycles so as to form one.
Compared with prior art, the beneficial effect of the disclosure is:
Disclosed technique scheme enters gas-liquid separator gas after throttling for the first time is independent through auxiliary compressor after separating
It is compressed to air cooler pressure, which can targetedly realize efficient compression process, improve system effectiveness.
Disclosed technique scheme Two-stage Compression can reduce the pressure ratio of every level-one, so that every level-one can realize efficient pressure
Contracting.
The stable operation of system may be implemented in the double heat sources of disclosed technique scheme, such as when winter temperature is low, can be with
The more heat using soil, and when summer temperature is high, it can the more heat using air-source.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is the system structure connection figure of embodiment of the present disclosure；
Fig. 2 is the system pressure-enthalpy chart of embodiment of the present disclosure；
In figure, 1, air-source evaporator；2, low-pressure stage compressor；3, high pressure stage compressor；4, gas cooler；5, first
Throttle valve；7, second throttle；10, third throttle valve；6, gas-liquid separator；8, soil source evaporator；9, internal exchanger；
11, auxiliary compressor.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Examples of implementation one
The examples of implementation disclose double heat source two stages of compression heat pump hot-water systems with auxiliary compressor, comprising: soil source
Evaporator, air-source evaporator, low pressure compressor, high pressure compressor, auxiliary compressor, internal exchanger, gas-liquid separator with
And gas cooler etc..Air-source and soil source evaporator can absorb heat from air-source and soil source respectively.Air-source
The refrigerant of evaporator outlet reaches soil source evaporating pressure after the boosting of low-pressure stage compressor, and goes out with soil source evaporator
The refrigerant of mouth mixes, and enters high pressure stage compressor together later.Refrigerant CO2Heat is completed in the heat release in gas cooler
Water heating process.Refrigerant is flowed out from gas cooler enters gas-liquid separator after throttling.The gas of gas-liquid separator outlet
Phase refrigerant is directly over auxiliary compressor and is compressed to gas cooler pressure, and liquid phase refrigerant enters evaporator link, respectively
Heat is absorbed from air and soil, is recycled so as to form one.
The less use in household low profile thermal pump water heater of dual-source evaporation device, mostly single air source heat pump.Because of double evaporations
Device system is more complicated, and input cost is higher.But with the attenuating of the raising of system heating load and environment temperature, double source heat
Pump can play the good feature of its low temperature adaptability.Currently used dual-source evaporation device system is mostly the overlapping system of double heat pump systems
System, the mode that the dual source system of embodiment of the present disclosure is combined with two-stage compression system not only can be improved environmental suitability but also can
With effective lifting system Energy Efficiency Ratio.
In the examples of implementation, referring specifically to shown in attached drawing 1, soil source evaporator 8 is medium temperature evaporator, air-source evaporation
Device 1 is cryogenic vaporizer.The saturated liquid refrigerant of cryogenic vaporizer outlet becomes to overheat after the heat absorption of internal exchanger 9
State subsequently enters low-pressure stage compressor 2 and is compressed to evaporating pressure corresponding to soil source evaporating temperature, evaporates later with medium temperature
The saturation refrigerant of device outlet mixes, and subsequently enters high pressure stage compressor 3 and is compressed to air cooler pressure, high pressure compressor goes out
The refrigerant that refrigerant at mouthful is exported with auxiliary compressor 11 mixes, into heat release in gas cooler 4, to generate demand
Heat.The refrigerant of air cooler outlet passes through 5 isenthalpic throttling of throttle valve to intermediate pressure, subsequently into gas-liquid separator 6.Gas
The gas of liquid/gas separator outlet enters directly into auxiliary compressor and is boosted to air cooler pressure.
In the examples of implementation, soil source evaporator 8 is medium temperature evaporator, and air-source evaporator 1 is cryogenic vaporizer, is
Because in winter in environment, soil source temperature can be significantly greater than air source temperature.It, can be by double heat under different evaporating pressures
Source heat pump system is combined with two-stage compression system.
The saturated liquid refrigerant of cryogenic vaporizer outlet became hot after the heat absorption of internal exchanger 9, with laggard
Enter low-pressure stage compressor 2 and be compressed to evaporating pressure corresponding to soil source evaporating temperature, makes the pressure of low pressure stage compressor outlet
Power evaporating pressure corresponding with soil source temperature is identical, can satisfy the isobaric mixing of two fluids.And it can be real after mixing
The intercooled thermodynamic process of existing two stages of compression.
Since system is transcritical operation, which is a pressure model on carbon dioxide critical pressure
It encloses, with the rising of the pressure, the temperature of compressor outlet refrigerant can also rise.When actual motion should according to operating condition into
Row optimality analysis.
Because air cooler export refrigerant state be it is overcritical, by throttle valve throttling after become two phases, into
And entering auxiliary compressor by gas-liquid separator rear portion, a part flows into evaporator.
After throttling, refrigerant pressure is reduced, and temperature reduces, and then can achieve soil source or air-source evaporator
Corresponding evaporating pressure, and there is enough cooling capacity to absorb heat from the external world, to complete entire cyclic process.
In the examples of implementation, referring to shown in attached drawing 2, the liquid of gas-liquid separator outlet is divided into two parts, a part
After throttle valve 7 isenthalpic throttling to medium temperature evaporating pressure, enters the heat absorption of soil source evaporator and be warming up to saturation gaseous state；It is another
Part, temperature is reduced to supercooled state after 9 heat release of internal exchanger, then by 10 isenthalpic throttling of throttle valve to low-temperature evaporation
Pressure, then goes through cryogenic vaporizer, absorbs heat to being saturated gaseous state.By above procedure, a complete circulation is formed.
When ambient temperature is higher, there can be more refrigerant to enter the heat absorption of air-source evaporator 1, and when winter temperature is lower,
There can be more refrigerant to enter the heat absorption of soil source evaporator 8, to realize the operation of system stability and high efficiency.
The system is combined by dual-evaporator system with two-stage compression system, has additionally incorporated auxiliary compressor.It should
Two evaporators in system can absorb heat from air-source and soil source respectively, because air-source is different with the temperature of soil source,
So two evaporators in system can work under different evaporating pressures respectively, which provides systems can be with two-stage
The condition that compressibility combines.Double heat source systems can be very good the environmental suitability and stability of lifting system, and two-stage
Compressibility can effective lifting system Energy Efficiency Ratio.In addition, the auxiliary compressor being added in system can effectively share loads most
The wasted work of high high pressure compressor increases the compressor service life, and further lifting system performance.
In above-described embodiment, refrigerant can be CO2Medium, but it is not limited to the medium, as long as other media
It can run within the system also within the protection scope of the disclosure.
Examples of implementation two
The examples of implementation disclose the working method of double heat source two stages of compression heat pump hot-water systems with auxiliary compressor, packet
It includes:
Cryogenic vaporizer is started to work, and the saturated liquid refrigerant of cryogenic vaporizer outlet absorbs heat by internal exchanger 9
After became hot；
Then excessively hot refrigerant enters low-pressure stage compressor 2, low-pressure stage compressor operating is controlled, by excessively hot system
Cryogen is compressed to evaporating pressure corresponding to soil source evaporating temperature, will be compressed to the refrigerant and soil source of required pressure later
The saturation refrigerant that evaporator 8 exports mixes；
Refrigerant after mixing subsequently enters high pressure stage compressor, and control high pressure stage compressor 3 works, to mixed system
Cryogen is compressed, and the operating pressure of gas cooler is compressed to；
The refrigerant that refrigerant at high-pressure compressor outlet is exported with auxiliary compressor 11 is mixed, it is cold into gas
But device 4, the heat release in gas cooler 4, to generate the heat of demand.The refrigerant that gas cooler 4 exports passes through throttle valve 5
Isenthalpic throttling is to intermediate pressure, subsequently into gas-liquid separator 6.
The gas of gas-liquid separator outlet enters directly into auxiliary compressor and is boosted to air cooler pressure.Gas-liquid separator
The liquid of outlet is divided into two parts, and a part enters soil source after throttle valve 7 isenthalpic throttling to medium temperature evaporating pressure
Evaporator heat absorption is warming up to saturation gaseous state；Another part, temperature is reduced to supercooled state after 9 heat release of internal exchanger, then
By 10 isenthalpic throttling of throttle valve to low-temperature evaporation pressure, cryogenic vaporizer is then gone through, absorbs heat to being saturated gaseous state.Through
Above procedure is crossed, a complete circulation is formed.
Examples of implementation three
The examples of implementation disclose the control system of double heat source two stages of compression heat pump hot-water systems with auxiliary compressor, should
Control system includes controller, the controller respectively with air-source evaporator, low-pressure stage compressor, high pressure stage compressor, gas
Body cooler, first throttle valve 5, second throttle 7, third throttle valve 10, gas-liquid separator, soil source evaporator, inside are changed
Hot device 9, auxiliary compressor are connected, for controlling the working condition of connected device.
With the difference of system conditions, air cooler pressure and intermediate choke pressure in system etc. also can constantly become
Change.When air cooler pressure rises, the ability for preparing high-temperature-hot-water can also be risen with it, but system COP can be declined, institute
To find optimum pressure value according to operating condition.
It, should be with than also into the refrigerant flow of soil source and air-source evaporator in addition, when air temperature variations
Variation.For example, when too low air temperature soil source evaporator should be used, to a greater extent to meet corresponding thermic load need
It asks.And when air themperature raising, so that it is greater than soil source temperature, since the actual installation capacity of soil source evaporator is limited,
And maintenance cost is higher, all refrigerants should be made all to enter in air-source evaporator at this time, and lifting system performance.
In use, double heat source two stages of compression heat pump hot-water systems with auxiliary compressor are applied in commercial water heater
Field.
It is understood that in the description of this specification, reference term " embodiment ", " another embodiment ", " other
The description of embodiment " or " first embodiment~N embodiment " etc. means specific spy described in conjunction with this embodiment or example
Sign, structure, material or feature are contained at least one embodiment or example of the disclosure.In the present specification, to above-mentioned
The schematic representation of term may not refer to the same embodiment or example.Moreover, the specific features of description, structure, material
Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.
The foregoing is merely preferred embodiment of the present disclosure, are not limited to the disclosure, for the skill of this field
For art personnel, the disclosure can have various modifications and variations.It is all within the spirit and principle of the disclosure, it is made any to repair
Change, equivalent replacement, improvement etc., should be included within the protection scope of the disclosure.
Claims (10)
1. double heat source two stages of compression heat pump hot-water systems with auxiliary compressor, characterized in that double heat source evaporators include
Air-source evaporator and soil source evaporator；
The refrigerant of the air-source evaporator outlet reaches soil source evaporating pressure after the boosting of low-pressure stage compressor, and with
The refrigerant of soil source evaporator outlet mixes, and enters high pressure stage compressor together later；
The heat release in gas cooler of the compressed refrigerant of high pressure stage compressor, completes hot water heating process, and refrigerant is from gas
The outflow of body cooler enters gas-liquid separator after throttling；
The vapor phase refrigerant of the gas-liquid separator outlet is directly over auxiliary compressor and is compressed to gas cooler pressure, liquid phase
Refrigerant enters evaporator link, absorbs heat from air and soil respectively, recycles so as to form one.
2. double heat source two stages of compression heat pump hot-water systems with auxiliary compressor as described in claim 1, characterized in that air
The saturated liquid refrigerant of source evaporator outlet became hot after internal exchanger absorbs heat, and subsequently entered low-pressure stage compression
Machine.
3. double heat source two stages of compression heat pump hot-water systems with auxiliary compressor as described in claim 1, characterized in that described
Auxiliary compressor is provided between gas-liquid separator and gas cooler on pipeline, the refrigerant at high-pressure compressor outlet with it is auxiliary
The refrigerant of compressor outlet is helped to mix, into heat release in gas cooler.
4. double heat source two stages of compression heat pump hot-water systems with auxiliary compressor as described in claim 1, characterized in that liquid phase
Refrigerant enters evaporator link, and a part enters soil source steaming after throttle valve isenthalpic throttling to medium temperature evaporating pressure
Hair device heat absorption is warming up to saturation gaseous state；Another part, temperature is reduced to supercooled state after internal exchanger heat release, then passes through
Another throttle valve isenthalpic throttling then goes through cryogenic vaporizer to low-temperature evaporation pressure, absorbs heat to being saturated gaseous state.
5. the working method of double heat source two stages of compression heat pump hot-water systems with auxiliary compressor, characterized in that include:
The refrigerant of air-source evaporator outlet reaches soil source evaporating pressure, and and soil after the boosting of low-pressure stage compressor
The refrigerant of source evaporator outlet mixes, and enters high pressure stage compressor together later；
The heat release in gas cooler of the compressed refrigerant of high pressure stage compressor, completes hot water heating process, and refrigerant is from gas
The outflow of body cooler enters gas-liquid separator after throttling；
The vapor phase refrigerant of gas-liquid separator outlet is directly over auxiliary compressor and is compressed to gas cooler pressure, liquid phase refrigeration
Agent enters evaporator link, absorbs heat from air and soil respectively, recycles so as to form one.
6. the working method of double heat source two stages of compression heat pump hot-water systems described in claim 5 with auxiliary compressor, special
Sign is that the saturation gaseous refrigerant of control air-source evaporator outlet enters internal exchanger and absorbs heat and become to overheat after heat absorption
State subsequently enters excessively hot refrigerant being delivered to low-pressure stage compressor.
7. double heat source two stages of compression heat pump hot-water systems with auxiliary compressor as claimed in claim 5, characterized in that will be high
The refrigerant that refrigerant at pressure compressor outlet is exported with auxiliary compressor mixes, into heat release in gas cooler.
8. the working method of double heat source two stages of compression heat pump hot-water systems with auxiliary compressor as claimed in claim 5,
It is characterized in, liquid phase refrigerant enters before evaporator link, and it is a part of after throttle valve isenthalpic throttling to medium temperature evaporating pressure,
It enters the heat absorption of soil source evaporator and is warming up to saturation gaseous state；Another part, temperature is reduced to after internal exchanger heat release
Supercooled state then goes through cryogenic vaporizer then by another throttle valve isenthalpic throttling to low-temperature evaporation pressure, absorbs heat
To saturation gaseous state.
9. the working method of double heat source two stages of compression heat pump hot-water systems with auxiliary compressor as claimed in claim 5,
Be characterized in, when ambient temperature is higher, have relatively large number of refrigerant enter air-source evaporator heat absorption, and winter temperature compared with
When low, there is relatively large number of refrigerant to enter the heat absorption of soil source evaporator.
10. the control based on any double heat source two stages of compression heat pump hot-water systems with auxiliary compressor of claim 1-4
System processed, the control system include controller, the controller respectively with air-source evaporator, low-pressure stage compressor, hiigh pressure stage
Compressor, gas cooler, throttle valve, gas-liquid separator, soil source evaporator, internal exchanger, auxiliary compressor are connected, and use
In the working condition of control connected device.
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Cited By (2)
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| CN111578684A (en) * | 2020-05-22 | 2020-08-25 | 陕西理工大学 | Vehicle-mounted heat pump drying system driven by engine |
| CN114857696A (en) * | 2022-06-02 | 2022-08-05 | 新科环保科技有限公司 | Magnetic suspension centrifugal air conditioning system |
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| CN114857696A (en) * | 2022-06-02 | 2022-08-05 | 新科环保科技有限公司 | Magnetic suspension centrifugal air conditioning system |
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