CN109489290A - A kind of twin-stage self-cascade heat pump system and its application method - Google Patents
A kind of twin-stage self-cascade heat pump system and its application method Download PDFInfo
- Publication number
- CN109489290A CN109489290A CN201811346045.9A CN201811346045A CN109489290A CN 109489290 A CN109489290 A CN 109489290A CN 201811346045 A CN201811346045 A CN 201811346045A CN 109489290 A CN109489290 A CN 109489290A
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- China
- Prior art keywords
- valve
- compressor
- temperature loop
- heat exchanger
- evaporator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of twin-stage self-cascade heat pump system and its application methods, are related to art of heat pumps.Including low-temperature loop, high temperature loop and heat exchanger；Two end interfaces of heat exchanger are connect with low-temperature loop and high temperature loop respectively；Low-temperature loop includes the first compressor, the first evaporator, the first expansion device, the first shut-off valve and four-way reversing valve；High temperature loop includes the second compressor, condenser, the second expansion device, the second shut-off valve, the second evaporator, the first solenoid valve and second solenoid valve.The present invention carries out overlapping heat exchange by setting low-temperature loop and high temperature loop and carries out concurrent heating by low-temperature loop when outdoor temperature is lower；There is single-stage circulation to turn to autocascade cycle, ensure that the heating load of heat pump, and heat pump is made to keep higher heat exchange efficiency, realizes energy saving to greatest extent.
Description
Technical field
The invention belongs to technical field of heat pumps, more particularly to a kind of twin-stage self-cascade heat pump system and its application method.
Background technique
With the raising of China's expanding economy and living standards of the people, energy supply is nervous, and national departments concerned is more next
More pay attention to energy conservation and utilizes.To consume the traditional heating modes of coal resources heating because it pollutes big, low efficiency and can not
The problems such as regeneration and the worry for causing people, the feasible pattern solved these problems first is that sufficiently using air source heat pump technology
It carries out substitution traditional technology and carries out heating, air source heat pump, which has, utilizes low taste energy, cold and hot shared same system benefit in atmosphere
With it is high-efficient and pollution-free the advantages that；But in winter because of mercury dropped, when unit is run at low ambient temperatures, system is steamed
Sending out temperature reduces, and the inspiratory volume of compressor increases, and the theoretical displacement of compressor be it is constant, enter compressor in this way
The volume flow of refrigerant is reduced, and corresponding unit refrigerant heating capacity is reduced, and condensation temperature reduces.
Summary of the invention
The purpose of the present invention is to provide a kind of twin-stage self-cascade heat pump system and its application methods, by the way that low temperature ring is arranged
Road and high temperature loop carry out overlapping heat exchange and carry out concurrent heating by low-temperature loop when outdoor temperature is lower；There is single-stage circulation steering
Autocascade cycle, ensure that the heating load of heat pump, and heat pump is made to keep higher heat exchange efficiency, realize energy saving to greatest extent.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is a kind of twin-stage self-cascade heat pump system, including low-temperature loop, high temperature loop and heat exchanger；The heat exchange
Two end interfaces of device are connect with low-temperature loop and high temperature loop respectively；
The low-temperature loop includes that the first compressor, the first evaporator, the first expansion device, the first shut-off valve and four-way change
To valve；Wherein, the arrival end of first expansion device is connect with heat exchanger port；The outlet end of first expansion device with
The arrival end of first evaporator connects；The outlet end of first evaporator and the port b of four-way reversing valve connect；The four-way
The port a of reversal valve is connect with the arrival end of the first compressor；The outlet end of first compressor and the end d of four-way reversing valve
Mouth connection；The port c of the four-way reversing valve is connect with heat exchanger Single port；Wherein, first shut-off valve is mounted on first
Between compressor and the port four-way reversing valve a；
The high temperature loop include the second compressor, condenser, the second expansion device, the second shut-off valve, the second evaporator,
First solenoid valve and second solenoid valve；Wherein, the Single port of the arrival end of second compressor and heat exchanger connects；Described
The outlet end of two compressors and the arrival end of condenser connect；The arrival end of the outlet end of the condenser and the second expansion device
Connection；The outlet of second expansion device is divided into two branches；Wherein, branch one is connect with the arrival end of the second evaporator；Branch
Road two is connect by second solenoid valve with heat exchanger Single port；The outlet end of second evaporator passes through the first solenoid valve and the
The arrival end of two compressors connects；Second shut-off valve is mounted between the second suction port of compressor end and heat exchanger.
Preferably, the condenser, which is mounted in water storage box, heats cold water.
Preferably, the heat exchanger is plate heat exchanger.
A kind of application method of twin-stage self-cascade heat pump system, it is described the following steps are included:
When ambient temperature is high, it is only necessary to which high temperature loop participates in circulation, and the first solenoid valve of control is opened, and closes the second electromagnetism
Valve and the second shut-off valve prevent refrigerant flow direction heat exchanger, the refrigerant superheat gas flow condensation being discharged from the second compressor
Refrigerant liquid after heat supply is flowed to the second evaporator after the throttling of the second expansion device, steamed second by device, the condenser
Refrigerant liquid becomes the second compressor of steam flow after absorbing heat to outdoor air in evaporation process in hair device, completes to supply
Thermal Cycling；
When ambient temperature is lower, starting low-temperature loop carries out concurrent heating, and the first solenoid valve of control is closed, and opens the second electricity
Magnet valve, the first shut-off valve and the second shut-off valve, the heat exchanger participate in heat exchange.
The invention has the following advantages:
The present invention carries out overlapping heat exchange by setting low-temperature loop and high temperature loop, when outdoor temperature is lower, by low
Warm loop carries out concurrent heating；There is single-stage circulation to turn to autocascade cycle, ensure that the heating load of heat pump, and so that heat pump is kept higher and change
The thermal efficiency realizes energy saving to greatest extent.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of system block diagram of twin-stage self-cascade heat pump system of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, the present invention is a kind of twin-stage self-cascade heat pump system, including low-temperature loop 10, high temperature loop
20 and heat exchanger 30；Two end interfaces of heat exchanger 30 are connect with low-temperature loop 10 and high temperature loop 20 respectively；
Low-temperature loop 10 includes the first compressor 11, the first evaporator 12, the first expansion device 13,14 and of the first shut-off valve
Four-way reversing valve 15；Wherein, the arrival end of the first expansion device 13 is connect with 30 port of heat exchanger；First expansion device 13 goes out
Mouth end is connect with the arrival end of the first evaporator 12；The outlet end of first evaporator is connect with the port b of four-way reversing valve 15；Four
The port a of logical reversal valve 15 is connect with the arrival end of the first compressor 11；The outlet end of first compressor 11 and four-way reversing valve
15 port d connection；The port c of four-way reversing valve 15 is connect with heat exchanger Single port；Wherein, the first shut-off valve 14 is mounted on
Between one compressor 11 and the port four-way reversing valve 15a；
High temperature loop 20 includes the second compressor 21, condenser 22, the second expansion device 23, the second shut-off valve 24, second
Evaporator 25, the first solenoid valve 26 and second solenoid valve 27；Wherein, one end of the arrival end of the second compressor 21 and heat exchanger 30
Mouth connection；The outlet end of second compressor 21 is connect with the arrival end of condenser 11；The outlet end of condenser 11 and the second expansion
The arrival end of device 23 connects；The outlet of second expansion device 23 is divided into two branches；Wherein, branch one and the second evaporator 25
Arrival end connection；Branch two is connect by second solenoid valve 27 with 30 Single port of heat exchanger；The outlet end of second evaporator 25 is logical
The first solenoid valve 26 is crossed to connect with the arrival end of the second compressor 21；Second shut-off valve 24 is mounted on 21 arrival end of the second compressor
Between heat exchanger 30.
Preferably, condenser 22, which is mounted in water storage box, heats cold water.
Preferably, heat exchanger 30 is plate heat exchanger.
A kind of application method of twin-stage self-cascade heat pump system, comprising the following steps:
When ambient temperature is high, it is only necessary to which high temperature loop 20 participates in circulation, and the first solenoid valve 26 of control is opened, and closes second
Solenoid valve 27 and the second shut-off valve 24 prevent refrigerant flow direction heat exchanger 30, the refrigerant superheat being discharged from the second compressor 21
Refrigerant liquid after heat supply is flowed to the second steaming after the throttling of the second expansion device 23 by gas flow condenser 22, condenser 22
Device 25 is sent out, refrigerant liquid becomes steam flow after absorbing heat to outdoor air in evaporation process in the second evaporator 25
Second compressor 21 completes heating cycle process；
When ambient temperature is lower, starting low-temperature loop 10 carries out concurrent heating, and the first solenoid valve 26 of control is closed, and opens the
Two solenoid valves 27, the first shut-off valve 14 and the second shut-off valve 24, heat exchanger 30 participate in heat exchange.
It is worth noting that, included each unit is only drawn according to function logic in the above system embodiment
Point, but be not limited to the above division, as long as corresponding functions can be realized；In addition, each functional unit is specific
Title is also only for convenience of distinguishing each other, the protection scope being not intended to restrict the invention.
In addition, those of ordinary skill in the art will appreciate that realizing all or part of the steps in the various embodiments described above method
It is that relevant hardware can be instructed to complete by program, corresponding program can store to be situated between in a computer-readable storage
In matter, the storage medium, such as ROM/RAM, disk or CD.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (4)
1. a kind of twin-stage self-cascade heat pump system characterized by comprising low-temperature loop (10), high temperature loop (20) and heat exchange
Device (30)；
Two end interfaces of the heat exchanger (30) are connect with low-temperature loop (10) and high temperature loop (20) respectively；
The low-temperature loop (10) includes the first compressor (11), the first evaporator (12), the first expansion device (13), first section
Only valve (14) and four-way reversing valve (15)；
Wherein, the arrival end of first expansion device (13) is connect with heat exchanger (30) port；First expansion device
(13) outlet end is connect with the arrival end of the first evaporator (12)；The outlet end of first evaporator and four-way reversing valve
(15) the port b connection；The port a of the four-way reversing valve (15) is connect with the arrival end of the first compressor (11)；Described
The outlet end of one compressor (11) is connect with the port d of four-way reversing valve (15)；The port c of the four-way reversing valve (15) with change
Hot device Single port connection；
Wherein, first shut-off valve (14) is mounted between the first compressor (11) and four-way reversing valve (15) port a；
The high temperature loop (20) includes the second compressor (21), condenser (22), the second expansion device (23), the second shut-off valve
(24), the second evaporator (25), the first solenoid valve (26) and second solenoid valve (27)；
Wherein, the arrival end of second compressor (21) is connect with the Single port of heat exchanger (30)；Second compressor
(21) outlet end is connect with the arrival end of condenser (11)；The outlet end and the second expansion device (23) of the condenser (11)
Arrival end connection；The outlet of second expansion device (23) is divided into two branches；Wherein, branch one and the second evaporator (25)
Arrival end connection；Branch two is connect by second solenoid valve (27) with heat exchanger (30) Single port；
The outlet end of second evaporator (25) is connect by the first solenoid valve (26) with the arrival end of the second compressor (21)；
Second shut-off valve (24) is mounted between the second compressor (21) arrival end and heat exchanger (30).
2. a kind of twin-stage self-cascade heat pump system according to claim 1, which is characterized in that condenser (22) installation
Cold water is heated in water storage box.
3. a kind of twin-stage self-cascade heat pump system according to claim 1, which is characterized in that the heat exchanger (30) is plate
Formula heat exchanger.
4. a kind of application method of twin-stage self-cascade heat pump system as described in claim 1-3 is any one, which is characterized in that institute
State the following steps are included:
When ambient temperature is high, it is only necessary to which high temperature loop (20) participates in circulation, and control the first solenoid valve (26) is opened, and closes second
Solenoid valve (27) and the second shut-off valve (24) prevent refrigerant flow direction heat exchanger (30), the system being discharged from the second compressor (21)
Cryogen overheated gas flows to condenser (22), and the condenser (22) is by the refrigerant liquid after heat supply through the second expansion device
(23) the second evaporator (25) are flowed to after throttling, refrigerant liquid is in evaporation process to outdoor empty in the second evaporator (25)
Become the second compressor of steam flow (21) after aspiration heat, completes heating cycle process；
When ambient temperature is lower, starting low-temperature loop (10) carries out concurrent heating, and control the first solenoid valve (26) is closed, and opens the
Two solenoid valves (27), the first shut-off valve (14) and the second shut-off valve (24), the heat exchanger (30) participate in heat exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346045.9A CN109489290A (en) | 2018-11-13 | 2018-11-13 | A kind of twin-stage self-cascade heat pump system and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346045.9A CN109489290A (en) | 2018-11-13 | 2018-11-13 | A kind of twin-stage self-cascade heat pump system and its application method |
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| Publication Number | Publication Date |
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| CN109489290A true CN109489290A (en) | 2019-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811346045.9A Pending CN109489290A (en) | 2018-11-13 | 2018-11-13 | A kind of twin-stage self-cascade heat pump system and its application method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595024A (en) * | 2020-06-03 | 2020-08-28 | 西京学院 | Intelligent split type heat pump |
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|---|---|---|---|---|
| CN1436980A (en) * | 2003-02-28 | 2003-08-20 | 浙江大学 | Method and mechanism for expanding heat producing capacity of heat pump under low temperature environment |
| CN101158507A (en) * | 2007-10-26 | 2008-04-09 | 华南理工大学 | Multiplex thermal storage type air source heat pump water heater |
| CN101975450A (en) * | 2010-11-03 | 2011-02-16 | 上海理工大学 | Air source heat pump water heater |
| CN104359247A (en) * | 2014-11-08 | 2015-02-18 | 合肥天鹅制冷科技有限公司 | Heat pump device |
| CN105135676A (en) * | 2015-10-10 | 2015-12-09 | 浙江万宝新能源科技有限公司 | Cascade heat accumulating type air source heat pump water heater |
| CN205641655U (en) * | 2016-05-10 | 2016-10-12 | 广东美的制冷设备有限公司 | Cascade refrigeration circulation system and have its air conditioner |
-
2018
- 2018-11-13 CN CN201811346045.9A patent/CN109489290A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436980A (en) * | 2003-02-28 | 2003-08-20 | 浙江大学 | Method and mechanism for expanding heat producing capacity of heat pump under low temperature environment |
| CN101158507A (en) * | 2007-10-26 | 2008-04-09 | 华南理工大学 | Multiplex thermal storage type air source heat pump water heater |
| CN101975450A (en) * | 2010-11-03 | 2011-02-16 | 上海理工大学 | Air source heat pump water heater |
| CN104359247A (en) * | 2014-11-08 | 2015-02-18 | 合肥天鹅制冷科技有限公司 | Heat pump device |
| CN105135676A (en) * | 2015-10-10 | 2015-12-09 | 浙江万宝新能源科技有限公司 | Cascade heat accumulating type air source heat pump water heater |
| CN205641655U (en) * | 2016-05-10 | 2016-10-12 | 广东美的制冷设备有限公司 | Cascade refrigeration circulation system and have its air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595024A (en) * | 2020-06-03 | 2020-08-28 | 西京学院 | Intelligent split type heat pump |
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Application publication date: 20190319 |