CN107024019A - A kind of carbon dioxide cascade type heat pump heating system - Google Patents
A kind of carbon dioxide cascade type heat pump heating system Download PDFInfo
- Publication number
- CN107024019A CN107024019A CN201710372400.9A CN201710372400A CN107024019A CN 107024019 A CN107024019 A CN 107024019A CN 201710372400 A CN201710372400 A CN 201710372400A CN 107024019 A CN107024019 A CN 107024019A
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- temperature level
- low
- circulation loop
- exchanging pipe
- heat
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000010438 heat treatment Methods 0.000 title claims abstract description 69
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 34
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 34
- 239000003507 refrigerant Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000008676 import Effects 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 229960004424 carbon dioxide Drugs 0.000 description 22
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention relates to a kind of carbon dioxide cascade type heat pump heating system.Heating system includes low-temperature level circulation loop, high-temperature level circulation loop and heating cycle loop.Refrigerant in low-temperature level circulation loop is carbon dioxide.Refrigerant in high-temperature level circulation loop is freon.Medium in heating cycle loop is recirculated water.Evaporative condenser has the first heat exchanging pipe and the second heat exchanging pipe, and the first heat exchanging pipe is connected in low-temperature level circulation loop, and the second heat exchanging pipe is connected in high-temperature level circulation loop.Condenser has the 3rd heat exchanging pipe and the 4th heat exchanging pipe, and the 3rd heat exchanging pipe is connected in high-temperature level circulation loop, and the 4th heat exchanging pipe is connected in heating cycle loop.Using the structure of low-temperature level circulation loop and high-temperature level circulation loop overlapping, that is, stable operation of the heating system in ultra-low temperature surroundings is realized, and disclosure satisfy that the heating under high leaving water temperature and high return water temperature operating mode.
Description
Technical field
The invention belongs to heating equipment field, and in particular to a kind of heating system being used in ultra-low temperature surroundings.
Background technology
At present, in the environment of ultralow temperature, such as under the weather environment of -35 DEG C of extreme cold, in order to interior etc.
Local heat supply is required to adapt to the heating system of environmental demand.In conventional heating system, such as refrigeration is used as using freon
The heating system of agent, can not run under -35 DEG C of weather of extremely trembling with fear at all.And along with the reduction of environment temperature, this confession
The heating capacity of hot systems is decayed very severe.
Although and existing carbon dioxide can be used as the heat pump of refrigerant in this ultra-low temperature surroundings.But
Most of application of existing carbon dioxide heat pump system is confined to hot-water supply, heats and is rarely employed in heating and circulation.
It is under operating mode of the carbon dioxide heat-pump inflow temperature no more than 40 DEG C or so even with carbon dioxide heat pump system also majority
Operation.Because carbon dioxide heat-pump is relatively adapted to the big heating mode of turnover water temperature difference and to be not suitable for the Inlet and outlet water temperature difference small
Heating mode.When the too high Compressor Discharge Pressure that can cause in carbon dioxide heat pump system of inflow temperature, temperature and air cooler
Outlet temperature is too high, and the reliability and life-span to carbon dioxide heat pump system have a significant impact.In actual heating or drying should
With occasion, the turnover water temperature difference of the circulating hot water exchanged heat with heating cycle system is smaller, such as at 5-10 DEG C, and such high temperature is returned
Water, which is not suitable for entering back into carbon dioxide heat-pump, to be reheated.
The content of the invention
It can stablize the two of heat supply to external world in ultra-low temperature surroundings the technical problem to be solved in the present invention is to provide a kind of
Carbonoxide cascade type heat pump heating system.
In order to solve the above-mentioned technical problem, a kind of technical scheme for using of the present invention is：A kind of carbon dioxide superposition type heat
Heat pump heating system.The heating system includes
Low-temperature level circulation loop, high-temperature level circulation loop and heating cycle loop, the low-temperature level circulation loop interior circulation circulation
Refrigerant be carbon dioxide, the low-temperature level circulation loop is used for high-temperature level circulation loop heat supply；
The refrigerant of the high-temperature level circulation loop interior circulation circulation is freon, and the high-temperature level circulation loop is used for heat supply
Circulation loop heat supply；
The medium of heating cycle loop interior circulation circulation is recirculated water, and the heating cycle loop is used for outwardly heat supply；
Evaporative condenser is provided between the low-temperature level circulation loop and high-temperature level circulation loop, the evaporative condenser is used for
Heat exchange between low-temperature level circulation loop and high-temperature level circulation loop, the evaporative condenser has the first heat exchange being disposed adjacent
Pipeline and the second heat exchanging pipe, first heat exchanging pipe are connected in the low-temperature level circulation loop, second heat exchanger tube
Road is connected in described high-temperature level circulation loop；
Condenser is provided between the high-temperature level circulation loop and heating cycle loop, the condenser is used to connect high-temperature level
Circulation loop and heating cycle loop and the heat exchange being used between high-temperature level circulation loop and heating cycle loop, the condenser
With the 3rd heat exchanging pipe being disposed adjacent and the 4th heat exchanging pipe, the 3rd heat exchanging pipe is connected to the high-temperature level circulation
In loop, the 4th heat exchanging pipe is connected in the heating cycle loop.
Specifically, being provided with low-temperature level compressor and low-temperature level evaporator, the low temperature in the low-temperature level circulation loop
The exhaust outlet of level compressor is connected with the import of first heat exchanging pipe, outlet and the low temperature of first heat exchanging pipe
The import connection of level evaporator, the outlet of the low-temperature level evaporator is connected with the air entry of the low-temperature level compressor, described
The refrigerant of circulation can absorb the heat in the external world in low-temperature level evaporator.
Specifically, high-temperature level compressor is provided with the high-temperature level circulation loop, the exhaust of the high-temperature level compressor
Mouth is connected with the import of the 3rd heat exchanging pipe, the outlet and the import of second heat exchanging pipe of the 3rd heat exchanging pipe
Connection, the outlet of second heat exchanging pipe is connected with the air entry of the high-temperature level compressor.
Further, the heating cycle loop is provided with the heat-sink unit for outwardly radiating, the heat-sink unit
It is connected with the 4th heat exchanging pipe, flowing through the refrigerant of the 4th heat exchanging pipe can exchange heat with the 3rd heat exchanging pipe
And absorb the heat for the refrigerant for flowing through the 3rd heat exchanging pipe.
Further, the low-temperature level circulation loop is additionally provided between the first heat exchanging pipe and low-temperature level evaporator
First throttle mechanism, the first throttle mechanism is used to adjust the flow of refrigerant in low-temperature level circulation loop.
Further, the high-temperature level circulation loop is additionally provided between the 3rd heat exchanging pipe and the second heat exchanging pipe
Second throttle body, the second throttle body is used to adjust the flow of refrigerant in high-temperature level circulation loop.
Specifically, the heat-sink unit is radiator or fan coil.
Specifically, the freon in described high-temperature level circulation loop is R134a or R404a environmental protection refrigerants.
It is preferred that, the evaporative condenser is one kind in plate type heat exchanger, double pipe heat exchanger and shell and tube exchanger.
The scope of the present invention, however it is not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, while should also contain
Lid other technical schemes as formed by being combined above-mentioned technical characteristic or its equivalent feature.Such as features described above and sheet
Disclosed in application（But it is not limited to）Technical characteristic with similar functions carries out technical scheme etc. formed by replacement mutually.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：Circulated using low-temperature level
Loop and the structure of high-temperature level circulation loop overlapping, that is, realize stable operation of the heating system in ultra-low temperature surroundings, and
It disclosure satisfy that the heating under high leaving water temperature and high return water temperature operating mode.Heating capacity decay is low, and efficiency is high.
Brief description of the drawings
Fig. 1 is the principle schematic of carbon dioxide cascade type heat pump heating system of the present invention；
Wherein：1st, low-temperature level compressor；2nd, the first heat exchanging pipe；3rd, first throttle mechanism；4th, low-temperature level evaporator；5th, high-temperature level
Compressor；6th, the 3rd heat exchanging pipe；7th, second throttle body；8th, the second heat exchanging pipe；9th, the 4th heat exchanging pipe；10th, the 4th change
Pipe line；101st, low-temperature level circulation loop；102nd, high-temperature level circulation loop；103rd, heating cycle loop；104th, evaporative condenser；
105th, condenser.
Embodiment
As shown in figure 1, a kind of carbon dioxide cascade type heat pump heating system of the present invention is recycled back to including low-temperature level
Road 101, high-temperature level circulation loop 102 and heating cycle loop 103.The low-temperature level circulation loop 101 and high-temperature level are recycled back to
Evaporative condenser is provided between road 102（104）.The evaporative condenser 104 includes the He of the first heat exchanging pipe 2 being disposed adjacent
Second heat exchanging pipe 8.It is provided between the high-temperature level circulation loop 102 and heating cycle loop 103 cold described in condenser 105
Condenser 105 includes the 3rd heat exchanging pipe 6 and the 4th heat exchanging pipe 9 being disposed adjacent.
The refrigerant of the interior circulation of low-temperature level circulation loop 101 circulation is carbon dioxide, the low-temperature level circulation loop
101 are used for the heat supply of high-temperature level circulation loop 102.Be additionally provided with the low-temperature level circulation loop 101 low-temperature level compressor 1,
Low-temperature level evaporator 4 and first throttle mechanism.The exhaust outlet of the low-temperature level compressor 1 enters with first heat exchanging pipe 2
Mouth connection.The outlet of first heat exchanging pipe 2 is connected by the import of the first throttle mechanism and the low-temperature level evaporator 4
Connect.The outlet of the low-temperature level evaporator 4 is connected with the air entry of the low-temperature level compressor 1.In the low-temperature level evaporator 4
The refrigerant of circulation can absorb the heat in the external world.The first throttle mechanism 3 be used for adjust in low-temperature level circulation loop 101 from
First heat exchanging pipe 2 flows to the flow of the refrigerant of low-temperature level evaporator 4.
The refrigerant of the interior circulation of high-temperature level circulation loop 102 circulation is freon.Freon in the present embodiment is
R134a or R404a environmental protection refrigerants.The high-temperature level circulation loop 102 is used for the heat supply of heating cycle loop 103.The height
High-temperature level compressor 5 and second throttle body 7 are additionally provided with warm level circulation loop 102.The exhaust of the high-temperature level compressor 5
Mouth is connected with the import of the 3rd heat exchanging pipe 6, outlet and second heat exchanging pipe 8 of the 3rd heat exchanging pipe 6
Import is connected.The outlet of second heat exchanging pipe 8 passes through second throttle body 7 and the air entry of the high-temperature level compressor 5
Connection.The second throttle body 7, which is used to adjust in high-temperature level circulation loop 102 from the 3rd heat exchanging pipe 8, flows to the second heat exchange
The flow of the refrigerant of pipeline 6.
The medium of the interior circulation of heating cycle loop 103 circulation is recirculated water, the heating cycle loop 103 be used for
Extraneous heat supply.The heating cycle loop 103 includes the heat-sink unit 10 and the 4th heat exchanging pipe for being used to outwardly radiate
9.The heat-sink unit 10 is connected with the 4th heat exchanging pipe 9.The refrigerant for flowing through the 4th heat exchanging pipe 9 can be with institute
State the heat that the 3rd heat exchanging pipe 6 exchanges heat and absorbs the refrigerant for flowing through the 3rd heat exchanging pipe 6.It is described in the present embodiment
Heat-sink unit 10 is radiator or fan coil.
The evaporative condenser 104 is used to connect low-temperature level circulation loop 101 and high-temperature level circulation loop 102 and for low
Heat exchange between warm level circulation loop 101 and high-temperature level circulation loop 102.The evaporative condenser 104 is plate type heat exchanger, set
One kind in pipe heat exchanger and shell and tube exchanger.
The condenser 105 is used to connect high-temperature level circulation loop 102 and heating cycle loop 103 and follow for high-temperature level
Heat exchange between loop back path 102 and heating cycle loop 103.
Carbon dioxide cascade type heat pump heating system of the present invention, passes through low-temperature level circulation loop 101 and high-temperature level
Heat supply to external world after the overlapping of circulation loop 102.Low-temperature level circulation loop 101 is used as refrigerant with carbon dioxide.Carbon dioxide
It is 0, the very low advantage of greenhouse effects, and the exothermic process companion of its trans critical cycle with nontoxic, non-ignitable, with low cost, ODP values
With there is larger temperature glide, temperature rise when being heated with water matches, and can disposably produce up to 90 DEG C of hot water, at the same its
Also higher Energy Efficiency Ratio and hot water temperature can be reached under under worst cold case.Carbon dioxide can be in ultralow temperature as low-temperature level working medium
Stable operation under environment, heating capacity decay is low, and efficiency is high.Carbon dioxide is as low-temperature level working medium, and refrigerating effect per unit swept volume is far high
In conventional freon working medium.
The high-temperature level circulation loop 102 uses freon high temperature refrigerant circulation heating, by being circulated with the low-temperature level
The mode of the overlapping of loop 101 ensure that the evaporation temperature of the second heat exchanging pipe 8 in high-temperature level circulation loop 102 under ultralow circumstance temperature
Degree keeps higher temperature, so as to realize to the high leaving water temperature in the heating cycle loop 103 and the heating of high return water temperature.
Using overlapping form, breaching can not mistake to condensator outlet temperature when carbon dioxide single-stage trans critical cycle is heated
High limitation, can be achieved high leaving water temperature and the heating of high return water temperature.
Main refrigeration part is only embodied in above-mentioned carbon dioxide cascade type heat pump heating system, other accessories,
Such as valve part and pressure vessel etc. are not shown.
As described above, we are illustrated fully according to spirit of the invention, but the present invention is not limited to above-mentioned reality
Apply example and implementation.The practitioner of correlative technology field can carry out different in the range of the technological thought license of the present invention
Change and implementation.
Claims (9)
1. a kind of carbon dioxide cascade type heat pump heating system, it is characterised in that the heating system includes：
Low-temperature level circulation loop（101）, high-temperature level circulation loop（102）With heating cycle loop（103）, the low-temperature level circulation
Loop（101）The refrigerant of interior circulation circulation is carbon dioxide, the low-temperature level circulation loop（101）For being circulated to high-temperature level
Loop（102）Heat supply；
The high-temperature level circulation loop（102）The refrigerant of interior circulation circulation is freon, the high-temperature level circulation loop（102）
For to heating cycle loop（103）Heat supply；
The heating cycle loop（103）The medium of interior circulation circulation is recirculated water, the heating cycle loop（103）For to
Extraneous heat supply；
The low-temperature level circulation loop（101）With high-temperature level circulation loop（102）Between be provided with evaporative condenser（104）, institute
State evaporative condenser（104）For low-temperature level circulation loop（101）With high-temperature level circulation loop（102）Between heat exchange, it is described
Evaporative condenser（104）With the first heat exchanging pipe being disposed adjacent（2）With the second heat exchanging pipe（8）, first heat exchanger tube
Road（2）It is connected to the low-temperature level circulation loop（101）In, second heat exchanging pipe（8）Described high-temperature level is connected to follow
Loop back path（102）In；
The high-temperature level circulation loop（102）With heating cycle loop（103）Between be provided with condenser（105）, the condensation
Device（105）For high-temperature level circulation loop（102）With heating cycle loop（103）Between heat exchange, the condenser（105）Tool
There is the 3rd heat exchanging pipe being disposed adjacent（6）With the 4th heat exchanging pipe（9）, the 3rd heat exchanging pipe（6）It is connected to the height
Warm level circulation loop（102）In, the 4th heat exchanging pipe（9）It is connected to the heating cycle loop（103）In.
2. a kind of carbon dioxide cascade type heat pump heating system according to claim 1, it is characterised in that the low-temperature level
Circulation loop（101）In be provided with low-temperature level compressor（1）With low-temperature level evaporator（4）, the low-temperature level compressor（1）Row
Gas port and first heat exchanging pipe（2）Import connection, first heat exchanging pipe（2）Outlet and the low-temperature level evaporate
Device（4）Import connection, the low-temperature level evaporator（4）Outlet and the low-temperature level compressor（1）Air entry connection, institute
State low-temperature level evaporator（4）The refrigerant of interior circulation can absorb the heat in the external world.
3. a kind of carbon dioxide cascade type heat pump heating system according to claim 2, it is characterised in that the high-temperature level
Circulation loop（102）In be provided with high-temperature level compressor（5）, the high-temperature level compressor（5）Exhaust outlet changed with the described 3rd
Pipe line（6）Import connection, the 3rd heat exchanging pipe（6）Outlet and second heat exchanging pipe（8）Import connection,
Second heat exchanging pipe（8）Outlet and the high-temperature level compressor（5）Air entry connection.
4. a kind of carbon dioxide cascade type heat pump heating system according to claim 3, it is characterised in that the heat supply is followed
Loop back path（103）It is provided with the heat-sink unit for outwardly radiating（10）, the heat-sink unit（10）With the described 4th heat exchange
Pipeline（9）Connection, flows through the 4th heat exchanging pipe（9）Refrigerant can be with the 3rd heat exchanging pipe（6）Exchange heat and inhale
Receipts flow through the 3rd heat exchanging pipe（6）Refrigerant heat.
5. a kind of carbon dioxide cascade type heat pump heating system according to claim 2, it is characterised in that the low-temperature level
Circulation loop（101）It is additionally provided with positioned at the first heat exchanging pipe（2）With low-temperature level evaporator（4）Between first throttle mechanism
（3）, the first throttle mechanism（3）For adjusting low-temperature level circulation loop（101）The flow of middle refrigerant.
6. a kind of carbon dioxide cascade type heat pump heating system according to claim 3, it is characterised in that the high-temperature level
Circulation loop（102）It is additionally provided with positioned at the 3rd heat exchanging pipe（6）With the second heat exchanging pipe（8）Between second throttle body
（7）, the second throttle body（7）For adjusting high-temperature level circulation loop（102）The flow of middle refrigerant.
7. a kind of carbon dioxide cascade type heat pump heating system according to claim 4, it is characterised in that the radiating list
Member（10）For radiator or fan coil.
8. a kind of carbon dioxide cascade type heat pump heating system according to claim 1, it is characterised in that described high temperature
Level circulation loop（102）In freon be R134a or R404a environmental protection refrigerants.
9. a kind of carbon dioxide cascade type heat pump heating system according to claim 1, it is characterised in that the evaporation is cold
Condenser（104）For one kind in plate type heat exchanger, double pipe heat exchanger and shell and tube exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372400.9A CN107024019A (en) | 2017-05-24 | 2017-05-24 | A kind of carbon dioxide cascade type heat pump heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372400.9A CN107024019A (en) | 2017-05-24 | 2017-05-24 | A kind of carbon dioxide cascade type heat pump heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107024019A true CN107024019A (en) | 2017-08-08 |
Family
ID=59529866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710372400.9A Pending CN107024019A (en) | 2017-05-24 | 2017-05-24 | A kind of carbon dioxide cascade type heat pump heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107024019A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328102A (en) * | 2017-08-18 | 2017-11-07 | 中国扬子集团滁州扬子空调器有限公司 | A kind of carbon dioxide combined heat pump hot water and air-conditioning system and its control method |
| CN110260550A (en) * | 2019-07-15 | 2019-09-20 | 中国建筑科学研究院有限公司 | Cascade high-temperature heat pump unit |
| CN111336707A (en) * | 2020-02-29 | 2020-06-26 | 同济大学 | Carbon dioxide heat pump heating system with topologic homoembryo circulation |
| CN111795423A (en) * | 2020-03-26 | 2020-10-20 | 同济大学 | Carbon dioxide heat pump heating system based on three-fluid heat exchanger |
| WO2021103053A1 (en) * | 2019-11-28 | 2021-06-03 | 江苏苏净集团有限公司 | Carbon dioxide overlapping type heating system, and control method therefor |
| CN113432172A (en) * | 2021-06-25 | 2021-09-24 | 青岛海信日立空调系统有限公司 | Heat pump unit indoor unit and heat pump unit |
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| CN101825367A (en) * | 2010-05-13 | 2010-09-08 | 济源市贝迪地能中央空调设备有限公司 | Gas-gas medium and low temperature dual-heat source type cascade high temperature heat pump |
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| CN204574593U (en) * | 2015-01-30 | 2015-08-19 | 中国矿业大学 | A kind of superposition type coupling cycle boiler |
| CN206989493U (en) * | 2017-05-24 | 2018-02-09 | 江苏苏净集团有限公司 | A kind of carbon dioxide cascade type heat pump heating system |
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| CN101825367A (en) * | 2010-05-13 | 2010-09-08 | 济源市贝迪地能中央空调设备有限公司 | Gas-gas medium and low temperature dual-heat source type cascade high temperature heat pump |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328102A (en) * | 2017-08-18 | 2017-11-07 | 中国扬子集团滁州扬子空调器有限公司 | A kind of carbon dioxide combined heat pump hot water and air-conditioning system and its control method |
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| CN110260550A (en) * | 2019-07-15 | 2019-09-20 | 中国建筑科学研究院有限公司 | Cascade high-temperature heat pump unit |
| WO2021103053A1 (en) * | 2019-11-28 | 2021-06-03 | 江苏苏净集团有限公司 | Carbon dioxide overlapping type heating system, and control method therefor |
| CN111336707A (en) * | 2020-02-29 | 2020-06-26 | 同济大学 | Carbon dioxide heat pump heating system with topologic homoembryo circulation |
| CN111795423A (en) * | 2020-03-26 | 2020-10-20 | 同济大学 | Carbon dioxide heat pump heating system based on three-fluid heat exchanger |
| CN113432172A (en) * | 2021-06-25 | 2021-09-24 | 青岛海信日立空调系统有限公司 | Heat pump unit indoor unit and heat pump unit |
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Application publication date: 20170808 |