CN103900288B - A kind of port district source pump and control method thereof - Google Patents
A kind of port district source pump and control method thereof Download PDFInfo
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- CN103900288B CN103900288B CN201410136123.8A CN201410136123A CN103900288B CN 103900288 B CN103900288 B CN 103900288B CN 201410136123 A CN201410136123 A CN 201410136123A CN 103900288 B CN103900288 B CN 103900288B
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- 238000009833 condensation Methods 0.000 claims description 21
- 230000005494 condensation Effects 0.000 claims description 21
- 239000003507 refrigerant Substances 0.000 claims description 13
- 238000009834 vaporization Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 6
- 230000001105 regulatory Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000000034 method Methods 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 5
- 230000002441 reversible Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- YLOCGHYTXIINAI-XKUOMLDTSA-N (2S)-2-amino-3-(4-hydroxyphenyl)propanoic acid;(2S)-2-aminopentanedioic acid;(2S)-2-aminopropanoic acid;(2S)-2,6-diaminohexanoic acid Chemical compound C[C@H](N)C(O)=O.NCCCC[C@H](N)C(O)=O.OC(=O)[C@@H](N)CCC(O)=O.OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 YLOCGHYTXIINAI-XKUOMLDTSA-N 0.000 description 1
- IMBXRZKCLVBLBH-OGYJWPHRSA-N CVP protocol Chemical compound ClCCN(CCCl)P1(=O)NCCCO1.O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1.C([C@H](C[C@]1(C(=O)OC)C=2C(=C3C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C=O)=CC=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 IMBXRZKCLVBLBH-OGYJWPHRSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Abstract
The present invention relates to a kind of port district source pump and control method thereof, source pump includes compressor, first four-way change-over valve, second four-way change-over valve, and First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, the 4th heat exchanger, the 5th heat exchanger, the 6th heat exchanger, the input of described compressor connects the first four-way change-over valve and the second four-way change-over valve, and the outfan of compressor connects the first four-way change-over valve and the second four-way change-over valve；First four-way change-over valve connects First Heat Exchanger and the second heat exchanger, second four-way change-over valve connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, First Heat Exchanger connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, second heat exchanger connects the 3rd heat exchanger, the 4th heat exchanger, 3rd heat exchanger and the 5th heat exchanger are in parallel, and the 4th heat exchanger and the 6th heat exchanger are in parallel.The present invention can reduce investment, saves the energy, reduces environmental thermal pollution.
Description
Technical field
The present invention relates to a kind of harbour port district building conditioner, more particularly, it relates to a kind of port district
By source pump and control method thereof.
Background technology
Port district is generally divided into production district and produces auxiliary region, and port district produces the heat supply of accessory building, particularly
Bulk goods port district, predominantly production operation personnel provide bathroom hot water, its heat supply feature be a heating load relatively
Greatly, heating time is shorter.Owing to port zone position is away from urban district, the heating of port district is difficult to use municipal heating systems to provide.
Chinese patent (Publication No.: CN102635904A) discloses a kind of new wind of Two-way Cycle and dries and add coil pipe
Cool down is air conditioning unit, and this unit is by producing high/low temperature cold water respectively, it is achieved that the epidemic disaster in building
Independent control.Port in summer district building air conditioning refrigeration duty is relatively big, there is substantial amounts of condensation heat, make during unit operation
Substantial amounts of heat is dispersed in the middle of outdoor environment, and environment is produced thermal pollution；Owing to this device can not carry summer
Domestic hot-water supply, need to redesign a set of thermal source, such as electric heater, Teat pump boiler hot water preparing, increases
Add the initial cost of system while equipment, use electrical heating hot water preparing, not only can increase initial cost,
And reduce the energy utilization rate that system is overall.
In order to solve problem above, the invention provides a kind of port district source pump and control method thereof, can
Realize following functions: Summer and winter air-conditioning and domestic hot-water is provided；Solve port district building and design a set of refrigeration
While unit, the problem also providing a set of hot water apparatus.Decrease initial cost, save the energy.
Summary of the invention
The technical problem to be solved in the present invention is environment is produced thermal pollution, and is not provided that domestic water,
For the defect that the big fund raising of above-mentioned thermal pollution of prior art is many, it is provided that a kind of port district source pump and control thereof
Method processed.
The technical solution adopted for the present invention to solve the technical problems is: a kind of port district source pump, including
Compressor, the first four-way change-over valve, the second four-way change-over valve, and First Heat Exchanger, the second heat exchanger,
Three heat exchangers, the 4th heat exchanger, the 5th heat exchanger, the 6th heat exchanger, the input of described compressor connects
First four-way change-over valve and the second four-way change-over valve, the outfan of compressor connects the first four-way change-over valve and
Two four-way change-over valves；First four-way change-over valve connects First Heat Exchanger and the second heat exchanger, the second four-way commutation
Valve connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, First Heat Exchanger connect the second heat exchanger,
3rd heat exchanger and the 4th heat exchanger, the second heat exchanger connects the 3rd heat exchanger, the 4th heat exchanger, and the 3rd changes
Hot device and the 5th heat exchanger are in parallel, and the 4th heat exchanger and the 6th heat exchanger are in parallel；
The second check valve, first unidirectional it is disposed with between first four-way change-over valve and the second four-way change-over valve
Valve, is provided with the second check valve between the first four-way change-over valve and the second heat exchanger, the second four-way change-over valve with
The first check valve it is provided with between second heat exchanger；
First throttle valve, electromagnetic valve, the second throttling it is disposed with between First Heat Exchanger and the 3rd heat exchanger
Valve, is provided with first throttle valve between First Heat Exchanger and the 4th heat exchanger, the second heat exchanger and the 4th heat exchange
It is provided with electromagnetic valve between device, between the second heat exchanger and the 3rd heat exchanger, is provided with second throttle, second
The 3rd check valve and in parallel with second throttle it is additionally provided with between heat exchanger and the 3rd heat exchanger.
Present invention also offers the control method of a kind of above-mentioned port district source pump, comprise the following steps:
S1, closedown electromagnetic valve, the cold-producing medium of low-temp low-pressure enters compressor through the second four-way change-over valve, passes through
High-temperature high-pressure refrigerant after compressor compresses is divided into two-way to circulate: first via cold-producing medium is through the first four-way
Reversal valve enters First Heat Exchanger condensation heat release, the second road cold-producing medium by the second four-way change-over valve through the
One check valve enters the second heat exchanger condensation heat release；
S2, by First Heat Exchanger condensation heat release cold-producing medium through first throttle valve adiabatic expansion, after reducing pressure by regulating flow
Cold-producing medium enters the 4th heat exchanger and absorbs the latent heat of vaporization, the cold-producing medium after the second heat exchanger condensation heat release cross the
Two choke valve adiabatic expansions, the cold-producing medium after reducing pressure by regulating flow enters the 3rd heat exchanger and absorbs the latent heat of vaporization；
The cold-producing medium mixing that S3, the 3rd the heat exchanger cold-producing medium flowed out and the 4th heat exchanger flow out, through the two or four
Logical reversal valve enters compressor, is again circulated.
Present invention also offers the control method of another kind of above-mentioned port district source pump, comprise the following steps:
S1, opens solenoid valve, the cold-producing medium of low-temp low-pressure enters compressor through the first four-way change-over valve, through overvoltage
High-temperature high-pressure refrigerant after the compression of contracting machine is divided into two-way to circulate: first via cold-producing medium commutates through the first four-way
Valve enters the second heat exchanger condensation heat release through the second check valve, and the second road cold-producing medium is through the second four-way change-over valve
Respectively enter the 3rd heat exchanger and the condensation heat release of the 4th heat exchanger；
S2, by the 3rd heat exchanger condensation heat release after cold-producing medium through the 3rd check valve with by second heat exchanger condensation heat release
After cold-producing medium mixing, again mixed, again by the cold-producing medium of electromagnetic valve and the 4th heat exchanger condensation heat release
Mixed cold-producing medium becomes the cold-producing medium of low-temp low-pressure through first throttle valve adiabatic expansion；
S3, by the cold-producing medium of first throttle valve adiabatic expansion through First Heat Exchanger vaporize, the low-temp low-pressure after vaporization
Cold-producing medium enters the input of compressor through the first four-way change-over valve, is again circulated.
Implement a kind of port district's source pump and the control method thereof of the present invention, have the advantages that
1, due to the effect of the second heat exchanger, while this device meets building refrigeration in summer, permissible
Produce domestic hot-water and reclaim a large amount of condensation heat；
2, turning to regulation effect due to four-way change-over valve, this device carries while ensureing heating in the winter time
Domestic hot-water supply, solves port district for heat problem；
3, due to arrange for loop structure system, summer recycle heat recycle, will not distribute
To outdoor, it is possible to reduce outdoor environment thermal pollution；
4, reduce investment, save the energy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of a kind of port of present invention district source pump.
Fig. 2 is the flow chart that a kind of port of present invention district source pump summer operation controls.
Fig. 3 is the flow chart that a kind of port of present invention district source pump winter operation controls.
Fig. 4 is the refrigerant cycle schematic diagram of a kind of port of present invention district source pump.
In figure: 1, compressor, the 2, first four-way change-over valve, the 3, second check valve, the 4, second four-way changes
To valve, the 5, first check valve, 6, First Heat Exchanger, the 7, second heat exchanger, 8, first throttle valve, 9,
Electromagnetic valve, 10, second throttle, the 11, the 3rd check valve, the 12, the 3rd heat exchanger, the 13, the 4th heat exchange
Device, the 14, the 5th heat exchanger, the 15, the 6th heat exchanger.
Detailed description of the invention
In order to be more clearly understood from the technical characteristic of the present invention, purpose and effect, now comparison accompanying drawing is detailed
Describe the detailed description of the invention of the bright present invention in detail.
As it is shown in figure 1, in a kind of port district source pump of the present invention, including compressor 1, the first four-way
Reversal valve 2, the second four-way change-over valve 4, and First Heat Exchanger the 6, second heat exchanger the 7, the 3rd heat exchanger
12, the 4th heat exchanger the 13, the 5th heat exchanger the 14, the 6th heat exchanger 15, the input of compressor 1 connects
First four-way change-over valve 2 and the second four-way change-over valve 4, the outfan of compressor 1 connects the first four-way commutation
Valve 2 and the second four-way change-over valve 4；First four-way change-over valve 2 connects First Heat Exchanger 6 and the second heat exchanger
7, the second four-way change-over valve 4 connects the second heat exchanger the 7, the 3rd heat exchanger 12 and the 4th heat exchanger 13, the
One heat exchanger 6 connects the second heat exchanger the 7, the 3rd heat exchanger 12 and the 4th heat exchanger 13, the second heat exchanger
7 connect the 3rd heat exchanger the 12, the 4th heat exchanger 13, and the 3rd heat exchanger 12 is in parallel with the 5th heat exchanger 14,
4th heat exchanger 13 is in parallel with the 6th heat exchanger 15；
The second check valve 3, first it is disposed with single between first four-way change-over valve 2 and the second four-way change-over valve 4
It is provided with the second check valve the 3, the 2nd 4 between valve 5, the first four-way change-over valve 2 and the second heat exchanger 7
Lead to and be provided with the first check valve 5 between reversal valve 4 and the second heat exchanger 7；
First throttle valve 8, electromagnetic valve 9, second it is disposed with between First Heat Exchanger 6 and the 3rd heat exchanger 12
Choke valve 10, is provided with first throttle valve 8 between First Heat Exchanger 6 and the 4th heat exchanger 13, and second changes
It is provided with electromagnetic valve 9, the second heat exchanger 7 and the 3rd heat exchanger 12 between hot device 7 and the 4th heat exchanger 13
Between be provided with second throttle 10, be additionally provided with the 3rd between the second heat exchanger 7 and the 3rd heat exchanger 12
Check valve 11 and in parallel with second throttle 10.
As in figure 2 it is shown, during summer operation, the control method of above-mentioned port district source pump comprises the following steps
S1, closedown electromagnetic valve 9, the cold-producing medium of low-temp low-pressure enters compressor 1 through the second four-way change-over valve 4,
High-temperature high-pressure refrigerant after compressor 1 compresses is divided into two-way to circulate: first via cold-producing medium is through the
One four-way change-over valve 2 enters First Heat Exchanger 6 and condenses heat release, and the second road cold-producing medium is changed by the second four-way
Enter the second heat exchanger 7 to valve 4 through the first check valve 5 and condense heat release；
S2, condensed the cold-producing medium of heat release by First Heat Exchanger 6 through first throttle valve 8 adiabatic expansion, reducing pressure by regulating flow
After cold-producing medium enter the 4th heat exchanger 13 absorb the latent heat of vaporization, the second heat exchanger 7 after condensing heat release
Second throttle 10 adiabatic expansion crossed by cold-producing medium, and the cold-producing medium after reducing pressure by regulating flow enters the 3rd heat exchanger 12
Absorb the latent heat of vaporization；
The cold-producing medium mixing that S3, the 3rd heat exchanger 12 cold-producing medium flowed out and the 4th heat exchanger 13 flow out, passes through
Second four-way change-over valve 4 enters compressor 1, is again circulated.
Water circulation process:
The cold water produced through the 4th heat exchanger 13 enters the 6th heat exchanger 15, produces through the 3rd heat exchanger 12
Cold water enter the 5th heat exchanger 14, complete room air by the 5th heat exchanger the 14, the 6th heat exchanger 15
Regulation process；Domestic hot-water is produced by the second heat exchanger 7 recovering condensing heat.
As it is shown on figure 3, during winter operation, the control method of above-mentioned port district source pump includes following step
Rapid:
S1, opens solenoid valve 9, the cold-producing medium of low-temp low-pressure enters compressor 1 through the first four-way change-over valve 2,
High-temperature high-pressure refrigerant after compressor 1 compresses is divided into two-way to circulate: first via cold-producing medium is through first
Four-way change-over valve 2 enters the second heat exchanger 7 through the second check valve 3 and condenses heat release, and the second road cold-producing medium passes through
Second four-way change-over valve 4 respectively enters the 3rd heat exchanger 12 and the 4th heat exchanger 13 condenses heat release；
S2, condensed by the 3rd heat exchanger 12 cold-producing medium after heat release through the 3rd check valve 11 with by the second heat exchanger 7
Cold-producing medium mixing after condensation heat release, condenses the cold-producing medium of heat release by electromagnetic valve 9 and the 4th heat exchanger 13
Again mixing, the most mixed cold-producing medium becomes the refrigeration of low-temp low-pressure through first throttle valve 8 adiabatic expansion
Agent；
S3, cold-producing medium by first throttle valve 8 adiabatic expansion vaporize through First Heat Exchanger 6, the low temperature after vaporization
Low pressure refrigerant enters the input of compressor 1 through the first four-way change-over valve 2, is again circulated.
Water cycle process:
The hot water produced through the 4th heat exchanger 13 enters the 6th heat exchanger 15, produces through the 3rd heat exchanger 12
Hot water enter the 5th heat exchanger 14, complete room air through the 5th heat exchanger the 14, the 6th heat exchanger 15
Regulation process；Domestic hot-water is produced by the second heat exchanger 7.
Embodiment:
Certain bulk goods port district total passenger places 232 people, the top class in a kindergarten 100 people, bathroom is arranged in Hou Gong building, totally three layers,
One layer is bathroom, needs hot water amount 7.5m3/ time, two layers of air conditioning area 800, required air-conditioning cold load is
120KW；Three layers of air conditioning area 300, required air-conditioning cold load is 45KW；Used by port of the present invention district
Source pump carries out air regulation to air-conditioned room, and the refrigeration duty that the 4th heat exchanger 13 undertakes is W1=45kW,
Cold-producing medium working medium is R134a, by the second heat exchanger 7 recovering condensing heat domestic hot-water supply, the steaming of the present invention
Sending out temperature is 4 DEG C, and condensation temperature is 50 DEG C.
Fig. 4 is refrigerant cycle schematic diagram, and graph 1-2 represents compressed in compressor 1 of cold-producing medium
Journey, graph 2-3 represents the condensation heat release in First Heat Exchanger 6 of the cold-producing medium working medium and the second heat exchanger thereof
7 processes producing domestic hot-water, graph 3-4 represents that cold-producing medium is through first throttle valve 8 and the second throttling
The throttling process of valve 10, graph 4-1 represents that cold-producing medium is at the 3rd heat exchanger 12 and the 4th heat exchanger 13
Interior evaporation process, by the reciprocation cycle of cold-producing medium, completes process of refrigerastion.
Energy Efficiency Analysis:
The parameter value of table one refrigerant condition point
One, the efficiency of the present invention calculates
Unit unit refrigerating capacity q=h1-h4=400-270=130kJ/kg
4th heat exchanger 13 refrigerant mass fluxes
3rd heat exchanger 12 refrigerant mass fluxes
Compressor 1 power consumption
P=(M1+M2)·(h2-h1)=(0.346+0.923) × (438-400)=48.22kW
Condensing units amount
W3=M2·(h2-h3)=0.923 × (438-270)=155kW
This unit leaving water temperature is 50 DEG C, and inflow temperature is 10 DEG C, and the specified hot water amount of generation is
Unit, after running 2-2.5h, produces 6.6-8.25m3Hot water, meets the top class in a kindergarten 100 people's bathing and wants
Ask.
Coefficient of refrigerating performance of the present invention is
Heating efficiency of the present invention is
The comprehensive energy efficiency ratio of the present invention is
COP=COP1+COP2=3.42+3.21=6.63
Two, the efficiency of traditional air conditioner unit calculates
Apparatus of the present invention are by contrasting with traditional air conditioner unit, and comprehensive COP is high compared with conventional value by 93.86%, with
The hot water 3.3m of Shi Huishou 50 DEG C3/h。
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned
Detailed description of the invention, above-mentioned detailed description of the invention is only schematic rather than restrictive, this
The those of ordinary skill in field, under the enlightenment of the present invention, is being protected without departing from present inventive concept and claim
Under the ambit protected, it may also be made that a lot of form, within these belong to the protection of the present invention.
Claims (2)
1. the port district source pump control method of a Zhong Gang district source pump, it is characterized in that, source pump includes compressor, the first four-way change-over valve, the second four-way change-over valve, and First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, the 4th heat exchanger, the 5th heat exchanger, the 6th heat exchanger, the input of described compressor connects the first four-way change-over valve and the second four-way change-over valve, and the outfan of compressor connects the first four-way change-over valve and the second four-way change-over valve；First four-way change-over valve connects First Heat Exchanger and the second heat exchanger, second four-way change-over valve connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, First Heat Exchanger connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, second heat exchanger connects the 3rd heat exchanger, the 4th heat exchanger, 3rd heat exchanger and the 5th heat exchanger are in parallel, and the 4th heat exchanger and the 6th heat exchanger are in parallel；The second check valve, the first check valve it is disposed with between first four-way change-over valve and the second four-way change-over valve, it is provided with the second check valve between first four-way change-over valve and the second heat exchanger, between the second four-way change-over valve and the second heat exchanger, is provided with the first check valve；It is disposed with first throttle valve, electromagnetic valve, second throttle between First Heat Exchanger and the 3rd heat exchanger, it is provided with first throttle valve between First Heat Exchanger and the 4th heat exchanger, it is provided with electromagnetic valve between second heat exchanger and the 4th heat exchanger, it is provided with second throttle between second heat exchanger and the 3rd heat exchanger, between the second heat exchanger and the 3rd heat exchanger, is additionally provided with the 3rd check valve and in parallel with second throttle；
Its control method comprises the following steps:
S1, closedown electromagnetic valve, the cold-producing medium of low-temp low-pressure enters compressor through the second four-way change-over valve, high-temperature high-pressure refrigerant after compressor compresses is divided into two-way to circulate: first via cold-producing medium enters First Heat Exchanger condensation heat release through the first four-way change-over valve, and the second road cold-producing medium enters the second heat exchanger condensation heat release by the second four-way change-over valve through the first check valve；
S2, by First Heat Exchanger condensation heat release cold-producing medium through first throttle valve adiabatic expansion, cold-producing medium after reducing pressure by regulating flow enters the 4th heat exchanger and absorbs the latent heat of vaporization, being crossed second throttle adiabatic expansion by the cold-producing medium after the second heat exchanger condensation heat release, the cold-producing medium after reducing pressure by regulating flow enters the 3rd heat exchanger and absorbs the latent heat of vaporization；
The cold-producing medium mixing that S3, the 3rd the heat exchanger cold-producing medium flowed out and the 4th heat exchanger flow out, enters compressor through the second four-way change-over valve, is again circulated.
2. the port district source pump control method of a Zhong Gang district source pump, it is characterized in that, source pump includes compressor, the first four-way change-over valve, the second four-way change-over valve, and First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, the 4th heat exchanger, the 5th heat exchanger, the 6th heat exchanger, the input of described compressor connects the first four-way change-over valve and the second four-way change-over valve, and the outfan of compressor connects the first four-way change-over valve and the second four-way change-over valve；First four-way change-over valve connects First Heat Exchanger and the second heat exchanger, second four-way change-over valve connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, First Heat Exchanger connects the second heat exchanger, the 3rd heat exchanger and the 4th heat exchanger, second heat exchanger connects the 3rd heat exchanger, the 4th heat exchanger, 3rd heat exchanger and the 5th heat exchanger are in parallel, and the 4th heat exchanger and the 6th heat exchanger are in parallel；The second check valve, the first check valve it is disposed with between first four-way change-over valve and the second four-way change-over valve, it is provided with the second check valve between first four-way change-over valve and the second heat exchanger, between the second four-way change-over valve and the second heat exchanger, is provided with the first check valve；It is disposed with first throttle valve, electromagnetic valve, second throttle between First Heat Exchanger and the 3rd heat exchanger, it is provided with first throttle valve between First Heat Exchanger and the 4th heat exchanger, it is provided with electromagnetic valve between second heat exchanger and the 4th heat exchanger, it is provided with second throttle between second heat exchanger and the 3rd heat exchanger, between the second heat exchanger and the 3rd heat exchanger, is additionally provided with the 3rd check valve and in parallel with second throttle；
Its control method comprises the following steps:
S1, opens solenoid valve, the cold-producing medium of low-temp low-pressure enters compressor through the first four-way change-over valve, high-temperature high-pressure refrigerant after compressor compresses is divided into two-way to circulate: first via cold-producing medium enters the second heat exchanger condensation heat release through the first four-way change-over valve through the second check valve, and the second road cold-producing medium respectively enters the 3rd heat exchanger and the condensation heat release of the 4th heat exchanger through the second four-way change-over valve；
S2, by the cold-producing medium after the 3rd heat exchanger condensation heat release through the 3rd check valve with condensed the cold-producing medium after heat release by the second heat exchanger and mix, the cold-producing medium being condensed heat release by electromagnetic valve and the 4th heat exchanger is mixed again, and the most mixed cold-producing medium becomes the cold-producing medium of low-temp low-pressure through first throttle valve adiabatic expansion；
S3, by the cold-producing medium of first throttle valve adiabatic expansion through First Heat Exchanger vaporize, the low-temperature low-pressure refrigerant after vaporization through first four-way change-over valve enter compressor input, be again circulated.
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| CN201410136123.8A CN103900288B (en) | 2014-04-04 | 2014-04-04 | A kind of port district source pump and control method thereof |
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| CN201410136123.8A CN103900288B (en) | 2014-04-04 | 2014-04-04 | A kind of port district source pump and control method thereof |
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| CN105698439B (en) * | 2016-04-08 | 2018-01-23 | 中交第二航务工程勘察设计院有限公司 | A kind of water resource heat pump and its control method of regulation and control port area thermal and humidity environment |
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| CN201672748U (en) * | 2010-03-26 | 2010-12-15 | 江乐新 | Multifunctional air conditioning and water heating all-in-one machine |
| CN102506520A (en) * | 2011-10-31 | 2012-06-20 | 刘雄 | Refrigeration equipment of air conditioner |
| CN203464560U (en) * | 2012-09-24 | 2014-03-05 | 刘雄 | Air conditioning refrigeration equipment |
| CN203489525U (en) * | 2013-09-11 | 2014-03-19 | 珠海格力电器股份有限公司 | Air conditioner hot-water system |
| CN203798017U (en) * | 2014-04-04 | 2014-08-27 | 中交第二航务工程勘察设计院有限公司 | Heat pump unit for harbor |
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