CN105758049B - Variable-flow either simplex matter heat exchangers in parallel overlapping heat pump system - Google Patents
Variable-flow either simplex matter heat exchangers in parallel overlapping heat pump system Download PDFInfo
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- CN105758049B CN105758049B CN201610286625.8A CN201610286625A CN105758049B CN 105758049 B CN105758049 B CN 105758049B CN 201610286625 A CN201610286625 A CN 201610286625A CN 105758049 B CN105758049 B CN 105758049B
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- interface
- solenoid valve
- valve
- compressor
- way reversing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
Abstract
The invention discloses a kind of variable-flow either simplex matter heat exchangers in parallel overlapping heat pump systems.Every group of compressor set of the present invention includes compressor,Four-way reversing valve,Four solenoid valves,First Heat Exchanger,Second heat exchanger,Compressor air-discharging end connects four-way reversing valve first interface,Compressor air suction end connects four-way reversing valve third interface,First solenoid valve one end is connect after being connected in parallel with second solenoid valve one end with four-way reversing valve second interface,The parallel connection after First Heat Exchanger of the first solenoid valve other end is connect by first throttle valve with condenser/evaporator second interface,It is connect with condenser/evaporator third interface after second solenoid valve other end parallel connection,Third solenoid valve is connect after being connected in parallel with the 4th solenoid valve one end with the 4th interface of four-way reversing valve,It is connect with condenser/evaporator first interface after third solenoid valve other end parallel connection,Pass through the second heat exchanger after 4th solenoid valve other end parallel connection,Second throttle is connected with the 4th interface of condenser/evaporator.The overlapping heat pump system of the present invention is made of either simplex matter, and it is simple not have to devices, the system structures such as expansion vessel.
Description
Technical field
The present invention relates to a kind of heat pump units, more specifically, being related to a kind of overlapping heat pump circulating system of multi-machine heads, use
To improve overlapping heat pump system efficiency, can be adjusted simultaneously for the working medium flow of heat pump system.
Background technology
Single stage compress heat pump system is not suitable for compression ratio (exhaust due to being limited by compressor suction and discharge compression ratio
The ratio between pressure and pressure of inspiration(Pi)) it is more than 12 heat pump system.In the prior art, the generally use twin-stage when compression ratio is more than 12
Compression heat pump system.Two-stage compression heat pump unit can be driven by a motor, can also be realized by multi-machine heads combo.But this
Two ways high-low pressure intercommunication, the problem of oil return of compressor are not easily solved.
When needing to obtain heat from lower temperature or need to convey heat to higher temperature, overlapping heat pump system is also very
Good settling mode.Heat is absorbed heat by low-temperature level heat pump system working medium from low-temperature heat source, and connection low-temperature level heat pump system is passed to
The condenser/evaporator of system and high-temperature level heat pump system, then transferred heat in hot environment by high-temperature level heat pump system working medium.
This traditional overlapping heat pump system is made of two kinds of working medium, and high-temperature level heat pump system uses high temperature refrigerant, low-temperature level heat pump system
System uses cryogenic fluid.But since cryogenic fluid is in a supercritical state at normal temperatures, expansion vessel usually is set in low-temperature level, is
System is complicated and is difficult to realize change working medium flow control.
Invention content
The present invention is in order to overcome the defects of the prior art, to provide a kind of overlapping heat pump cycle system of multi-machine heads either simplex matter
System, to improve overlapping heat pump system efficiency, can be adjusted simultaneously for the working medium flow of heat pump system.
The present invention is achieved through the following technical solutions：
A kind of variable-flow either simplex matter heat exchangers in parallel overlapping heat pump system, including it is multigroup compressor set being connected in parallel, cold
Solidifying evaporator, first throttle valve and second throttle, every group of compressor set include compressor, four-way reversing valve, the first solenoid valve,
Second solenoid valve, third solenoid valve, the 4th solenoid valve, First Heat Exchanger, the second heat exchanger, compressor air-discharging end connection four-way change
To valve first interface, compressor air suction end connects four-way reversing valve third interface, first solenoid valve one end and second solenoid valve one
End is connect after being connected in parallel with four-way reversing valve second interface, and first solenoid valve other end parallel connection after First Heat Exchanger passes through
First throttle valve is connect with condenser/evaporator second interface, after second solenoid valve other end parallel connection with condenser/evaporator third interface
Connection, third solenoid valve are connect after being connected in parallel with the 4th solenoid valve one end with the 4th interface of four-way reversing valve, third solenoid valve
It is connect with condenser/evaporator first interface after other end parallel connection, passes through the second heat exchanger, after the 4th solenoid valve other end parallel connection
Two throttle valves are connected with the 4th interface of condenser/evaporator.
Compressor can be used as the high-temperature level and low-temperature level compressor of refrigeration cycle, also can be used as heat pump cycle high-temperature level and
Low-temperature level compressor.When high-temperature level compressor of the compressor as refrigeration system, four-way reversing valve first interface connects with second
Mouth communicates, and third interface is communicated with the 4th interface, and the first solenoid valve and third solenoid valve are opened, second solenoid valve and the 4th electromagnetism
Valve is closed, through four-way reversing valve first interface, four-way reversing valve second interface, the first electromagnetism after working medium is compressed by the compressor at this time
It condenses in valve to First Heat Exchanger, is evaporated in condenser/evaporator after first throttle valve throttles, absorb the condensation heat of low-temperature level,
It is returned in compressor using third solenoid valve, the 4th interface of four-way reversing valve, four-way reversing valve third interface；When compressor is made
For refrigeration system low-temperature level compressor when, four-way reversing valve first interface is communicated with second interface, and third interface connects with the 4th
Mouth communicates, and second solenoid valve and the 4th solenoid valve are opened, and the first solenoid valve and third solenoid valve are closed, and working medium is by compressor at this time
Through being condensed in four-way reversing valve first interface, four-way reversing valve second interface, second solenoid valve to condenser/evaporator after compression, to
High-temperature level radiates, and condensed working medium is evaporated in the second heat exchanger after second throttle throttles, and generates refrigeration phenomenon, then pass through
The 4th solenoid valve, the 4th interface of four-way reversing valve, four-way reversing valve third interface is crossed to return in compressor；When compressor is as warm
When the high-temperature level compressor of pumping system, four-way reversing valve first interface is communicated with the 4th interface, second interface and third interface phase
Logical, second solenoid valve and the 4th solenoid valve are opened, and the first solenoid valve and third solenoid valve are closed, and working medium is compressed by the compressor at this time
By being condensed in four-way reversing valve first interface, the 4th interface of four-way reversing valve, the 4th solenoid valve to the second heat exchanger, system is generated
Thermal phenomenon evaporates after second throttle throttles in condenser/evaporator, absorbs the condensation heat of low-temperature level, using the second electromagnetism
Valve, four-way reversing valve second interface, four-way reversing valve third interface return in compressor；When compressor is as the low of heat pump system
When warm grade compressor, four-way reversing valve first interface is communicated with the 4th interface, and second interface is communicated with third interface, the first electromagnetism
Valve and third solenoid valve are opened, and second solenoid valve and the 4th solenoid valve are closed, and are changed through four-way after working medium is compressed by the compressor at this time
It condenses into valve first interface, the 4th interface of four-way reversing valve, third solenoid valve to condenser/evaporator, radiates to high-temperature level, it is cold
Working medium after solidifying is evaporated after first throttle valve throttles in First Heat Exchanger, and heat of low-temperature heat source is absorbed, using the first electricity
Magnet valve, four-way reversing valve second interface, four-way reversing valve third interface return in compressor.
The compressor is in screw compressor, rotor compressor, helical-lobe compressor, piston compressor or other pattern pressures
Contracting machine it is any, variable-flow mode is adjusted by AC frequency conversion or DC frequency-changing, can also be used working medium unloading and load
Mode realizes the flow-rate adjustment of working medium.
The First Heat Exchanger and the second heat exchanger are air-cooled, water-cooled or other pattern heat exchangers.
The condenser/evaporator is plate heat exchanger, double pipe heat exchanger or other pattern heat exchangers.
The first throttle valve and second throttle are electric expansion valve, heating power expansion valve, capillary or orifice throttle dress
It sets.
The solenoid valve can be by replacements such as hand stop valve, ball valves.
The four-way reversing valve can also be replaced by multiple solenoid valves.
Compared with prior art, the beneficial effects of the invention are as follows：
1, system is flexible：Compressor in the overlapping heat pump system of the present invention can all pass through suction end and exhaust end solenoid valve
The be turned on and off high-temperature level as refrigeration system, the high-temperature level of low-temperature level and heat pump system, low-temperature level use, realize high temperature
The mutual conversion of grade compressor and low-temperature level compressor, is convenient for energy adjustment between grade.
2, simple system：The overlapping heat pump system of the present invention is made of either simplex matter, does not have to the devices such as expansion vessel, system knot
Structure is simple.
3, efficient：Due to realizing control, high-temperature level heat pump system and low-temperature level heat pump system using change working medium flow mode
Uniting, working medium flow proportioning is reasonable, and system effectiveness is high.
4, compressor problem of oil return is solved：High-temperature level heat pump system of the present invention is isolated with low-temperature level heat pump system, is solved
The oil return unevenness problem occurred when using two-stage compression cycle system.
Description of the drawings
Fig. 1 show variable-flow either simplex matter parallel connection First Heat Exchanger of the present invention, the signal of the second heat exchanger overlapping heat pump system
Figure；
Fig. 2 show four interface diagrams of four-way reversing valve in the present invention,
Fig. 3 show four interface diagrams of condenser/evaporator in the present invention.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments to the detailed description of the invention.
Embodiment 2
Fig. 1 be the present invention variable-flow either simplex matter parallel connection First Heat Exchanger, the second heat exchanger overlapping heat pump system schematic diagram,
Including multigroup compressor set being connected in parallel, condenser/evaporator 6, first throttle valve 5-1 and second throttle 5-2, every group of compression
Unit includes compressor 1, four-way reversing valve 2, the first solenoid valve 3-1, second solenoid valve 3-2, third solenoid valve 3-3, the 4th electricity
Magnet valve 3-4, First Heat Exchanger 4, the second heat exchanger 7,1 exhaust end of the compressor connect the four-way reversing valve first interface 2-
1, the compressor air suction end connects the four-way reversing valve third interface 2-3, the first solenoid valve 3-1 and second electricity
The one end magnet valve 3-2 is connect after being connected in parallel with the four-way reversing valve second interface 2-2, the first solenoid valve 3-1 other ends
Connect with 4 one end of the First Heat Exchanger, 4 other end of the First Heat Exchanger successively with the first throttle valve 5-1 and described
The 6-2 connections of condenser/evaporator second interface, the second solenoid valve 3-2 other ends and the condenser/evaporator third interface 6-3
Connection, the one end the third solenoid valve 3-3 and the 4th solenoid valve 3-4 connect after being connected in parallel with the four-way reversing valve the 4th
Mouth 6-4 connections, the third solenoid valve 3-3 other ends are connect with the condenser/evaporator first interface 6-1, the 4th electromagnetism
The valve 3-4 other ends are connect with described second heat exchanger, 7 one end, 7 other end of the second heat exchanger successively with second throttle 5-2
It is connected with the 4th interface 6-4 of the condenser/evaporator.
Fig. 2 show four interfaces of the four-way reversing valve 2, wherein：Four-way reversing valve first interface 2-1, four-way change
To valve second interface 2-2, four-way reversing valve third interface 2-3, the 4th interface 2-4 of four-way reversing valve.When the four-way reversing valve
When first interface 2-1 is communicated with the four-way reversing valve second interface 2-2, the four-way reversing valve third interface 2-3 with it is described
The 4th interface 2-4 of four-way reversing valve is communicated；As the four-way reversing valve first interface 2-1 and the 4th interface of the four-way reversing valve
When 2-4 is communicated, the four-way reversing valve second interface 2-2 is communicated with the four-way reversing valve third interface 2-3.
Fig. 3 show four interfaces of the condenser/evaporator 6, wherein：Condenser/evaporator first interface 6-1, condensation are steamed
Send out device second interface 6-2, condenser/evaporator third interface 6-3, the 4th interface 6-4 of condenser/evaporator.The condenser/evaporator
One interface 6-1 is communicated with the condenser/evaporator second interface 6-2, the condenser/evaporator third interface 6-3 and the condensation
The 4th interface 6-4 of evaporator is communicated.
Unsteady flow may be implemented in the matter parallel connection of variable-flow either simplex shown in Fig. 1 First Heat Exchanger, the second heat exchanger overlapping heat pump system
Either simplex matter cascade refrigeration system cycle is measured, can also realize that variable-flow either simplex matter overlapping heat pump system recycles.Any of which platform institute
It states compressor 1 and can not only be used for refrigeration system cycle (or heat pump system cycle) high-temperature level compressor use, also can be used as refrigeration system
System cycle (or heat pump system cycle) low-temperature level compressor uses.Concrete condition is as follows：
1, the compressor 1 is used as refrigeration system cyclic high-temperature grade compressor：The First Heat Exchanger 4 is condensation
Device, the four-way reversing valve first interface 2-1 of each group compressor set are communicated with the four-way reversing valve second interface 2-2, institute
It states four-way reversing valve third interface 2-3 to communicate with the 4th interface 2-4 of the four-way reversing valve, the first solenoid valve 3-1 and institute
It states third solenoid valve 3-3 to open, the second solenoid valve 3-2 and the 4th solenoid valve 3-4 are closed.Working medium is by the compressor
Through the four-way reversing valve first interface 2-1, the four-way reversing valve second interface 2-2 and first solenoid valve after 1 compression
3-1, which enters in the First Heat Exchanger 4, to be condensed, to function of environment heat emission, through it is described after first throttle valve 5-1 throttlings from the condensation
Evaporator second interface 6-2, which enters in the condenser/evaporator 6, to be evaporated, from the condensation after absorption low-temperature level refrigeration system heat
Evaporator first interface 6-1 outflows, through the third solenoid valve 3-3, the 4th interface 2-4 of the four-way reversing valve and the four-way
Reversal valve third interface 2-3 is returned in the compressor 1.
2, the compressor 1 is used as refrigeration system cycle low-temperature level compressor：Second heat exchanger 7 is evaporation
Device, the four-way reversing valve first interface 2-1 of each group compressor set are communicated with the four-way reversing valve second interface 2-2, institute
It states four-way reversing valve third interface 2-3 to communicate with the 4th interface 2-4 of the four-way reversing valve, the second solenoid valve 3-2 and institute
It states the 4th solenoid valve 3-4 to open, the first solenoid valve 3-1 and the third solenoid valve 3-3 are closed.Working medium is by the compressor
Through the four-way reversing valve first interface 2-1, the four-way reversing valve second interface 2-2 and the second solenoid valve after 1 compression
3-2, which enters from the condenser/evaporator third interface 6-3 in the condenser/evaporator 6, to be condensed, to high-temperature level refrigeration system heat release
Afterwards from the 4th interface 6-4 outflows of the condenser/evaporator, enter second heat exchanger after second throttle 5-2 throttlings
It is evaporated in 7, refrigeration phenomenon is generated, through the 4th solenoid valve 3-4, the 4th interface 2-4 of the four-way reversing valve and the four-way
Reversal valve third interface 2-3 is returned in the compressor 1.
3, the compressor 1 is used as heat pump system cyclic high-temperature grade compressor：Second heat exchanger 7 is condensation
The four-way reversing valve first interface 2-1 of device, each group compressor set is communicated with the 4th interface 2-4 of the four-way reversing valve, institute
It states four-way reversing valve second interface 2-2 to communicate with the four-way reversing valve third interface 2-3, the second solenoid valve 3-2 and institute
It states the 4th solenoid valve 3-4 to open, the first solenoid valve 3-1 and the third solenoid valve 3-3 are closed.Working medium is by the compressor
Through the four-way reversing valve first interface 2-1, the 4th interface 2-4 of the four-way reversing valve and the 4th solenoid valve after 1 compression
3-4, which enters in second heat exchanger 7, condenses heat release, generates heating phenomenon, from described after second throttle 5-2 throttlings
The 4th interface 6-4 of condenser/evaporator, which enters in the condenser/evaporator 6, to be evaporated, from described after absorption low-temperature level heat pump system heat
Condenser/evaporator third interface 6-3 outflow, through the second solenoid valve 3-2, the four-way reversing valve second interface 2-2 and described
Four-way reversing valve third interface 2-3 is returned in the compressor 1.
4, the compressor 1 is used as heat pump system cycle low-temperature level compressor：The First Heat Exchanger 4 is evaporation
The four-way reversing valve first interface 2-1 of device, each group compressor set is communicated with the 4th interface 2-4 of the four-way reversing valve, institute
It states four-way reversing valve second interface 2-2 to communicate with the four-way reversing valve third interface 2-3, the first solenoid valve 3-1 and institute
It states third solenoid valve 3-3 to open, the second solenoid valve 3-2 and the 4th solenoid valve 3-4 are closed.Working medium is by the compressor
Through the four-way reversing valve first interface 2-1, the 4th interface 2-4 of the four-way reversing valve and the third solenoid valve after 1 compression
3-3, which enters from the condenser/evaporator first interface 6-1 in the condenser/evaporator 6, to be condensed, and is radiated to high-temperature level heat pump system
It is flowed out afterwards from the condenser/evaporator second interface 6-2, enters the First Heat Exchanger after first throttle valve 5-1 throttlings
It is evaporated in 4, absorbs heat of low-temperature heat source, through the first solenoid valve 3-1, the four-way reversing valve second interface 2-2 and described
Four-way reversing valve third interface 2-3 is returned in the compressor 1.
First Heat Exchanger in parallel, the second heat exchanger overlapping heat pump system are only listed in the embodiment of the present invention, are actually being answered
Shared First Heat Exchanger, second heat exchanger overlapping heat pump system in parallel and First Heat Exchanger in parallel may be used in, share the
Two heat exchanger overlapping heat pump systems.
Compressor in the variable-flow either simplex matter overlapping heat pump system of the present invention can be realized high by start-stop or motor frequency conversion
The changes in flow rate of warm grade refrigeration (or heat pump) system and low-temperature level refrigeration (or heat pump) system.
In specific use, it is fixed that compressor can be used partly or entirely the variable-flow either simplex matter overlapping heat pump system of the present invention
Frequency compressor, to reduce investment.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of variable-flow either simplex matter heat exchangers in parallel overlapping heat pump system, which is characterized in that including multigroup pressure being connected in parallel
Contracting unit, condenser/evaporator, first throttle valve and second throttle, every group of compressor set include compressor, four-way reversing valve,
One solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, First Heat Exchanger, the second heat exchanger, compressor air-discharging end
Four-way reversing valve first interface is connected, compressor air suction end connects four-way reversing valve third interface, first solenoid valve one end and the
Two solenoid valve one end are connect after being connected in parallel with four-way reversing valve second interface, and the first solenoid valve other end passes through First Heat Exchanger
It is in parallel afterwards to be connect with condenser/evaporator second interface by first throttle valve, after second solenoid valve other end parallel connection with condensation evaporation
Device third interface connects, and third solenoid valve is connect after being connected in parallel with the 4th solenoid valve one end with the 4th interface of four-way reversing valve,
It is connect with condenser/evaporator first interface after third solenoid valve other end parallel connection, passes through second after the 4th solenoid valve other end parallel connection
Heat exchanger, second throttle are connected with the 4th interface of condenser/evaporator；
The compressor is screw compressor, rotor compressor, helical-lobe compressor or piston compressor；
The First Heat Exchanger and the second heat exchanger are air-cooled or water-cooled.
2. variable-flow either simplex matter heat exchangers in parallel overlapping heat pump system according to claim 1, which is characterized in that described cold
Solidifying evaporator is plate heat exchanger or double pipe heat exchanger.
3. variable-flow either simplex matter heat exchangers in parallel overlapping heat pump system according to claim 1, which is characterized in that described
One throttle valve and second throttle are electric expansion valve, heating power expansion valve, capillary or throttle orifice plate apparatus.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278793B (en) * | 2018-03-21 | 2023-11-07 | 天津商业大学 | Heat pump system capable of realizing variable flow single-stage compression cycle and cascade cycle |
| CN108266917B (en) * | 2018-03-21 | 2023-11-07 | 天津商业大学 | Variable flow multicycle heat pump system |
| CN109210814A (en) * | 2018-10-10 | 2019-01-15 | 天津商业大学 | A kind of multifunction refrigeration system |
| WO2021068429A1 (en) * | 2019-10-06 | 2021-04-15 | 李华玉 | Single-working-medium combined cycle heat pump device |
| CN116123744A (en) * | 2023-03-24 | 2023-05-16 | 哈尔滨工业大学 | Ultralow-temperature single-stage and double-stage hybrid air source heat pump unit |
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| CN105758049A (en) | 2016-07-13 |
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Effective date of registration: 20210107 Address after: 067500 No.6, TONGHANG street, Pingquan Economic Development Zone, Chengde City, Hebei Province Patentee after: HEBEI HANYAM REFRIGERATION EQUIPMENT Co.,Ltd. Address before: Tianjin highway 300134 East Tianjin District of Beichen City Patentee before: TIANJIN University OF COMMERCE |