CN112325509B - Intermediate cooling heat recovery triple heat supply pump system - Google Patents
Intermediate cooling heat recovery triple heat supply pump system Download PDFInfo
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- CN112325509B CN112325509B CN202011171315.4A CN202011171315A CN112325509B CN 112325509 B CN112325509 B CN 112325509B CN 202011171315 A CN202011171315 A CN 202011171315A CN 112325509 B CN112325509 B CN 112325509B
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- heat exchanger
- stage compressor
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
Abstract
The invention is applicable to the technical field of refrigeration equipment, and provides an intermediate cooling heat recovery triple-generation heat pump system, which comprises: the low-pressure stage compressor, the high-pressure stage compressor, the intercooler, the first heat exchanger, the heat recoverer, the heat regenerator, the second heat exchanger and the four-way valve are connected through pipelines; and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on connecting pipes of the inlet of the intercooler and the inlet of the heat regenerator. Therefore, the superheated steam discharged by the low-pressure stage compressor can be cooled by controlling the cooling temperatures of the intercooler and the heat regenerator, the two-stage compression and intermediate cooling process is realized, and the efficiency of the compressor is further improved; the refrigeration and heating coefficients of the cycle are improved by heat recovery.
Description
Technical Field
The invention relates to the technical field of heat recovery equipment, in particular to an intermediate cooling heat recovery triple heat pump system.
Background
In the process of evaporation refrigeration, a large amount of condensation heat needs to be discharged, if not used, the condensation heat is directly discharged into the atmosphere, so that not only is the part of heat wasted and is larger energy waste caused, but also the surrounding environment temperature is increased due to the heat dissipation, and serious environmental heat pollution and atmospheric air temperature chamber effect are caused. Therefore, in the occasion with cold and hot requirements, the condensation heat is properly recovered and utilized, and the method is an effective measure for energy conservation and emission reduction.
In recent years, as the world-wide energy and environmental problems become more serious, research and application of condensation heat recovery of a heat pump system are more and more recently applied for some patents with heat recoverers, such as a novel double-condenser unit with publication number of CN101097101a (application number of 200610085333.4), and waste heat recovery is performed by adopting a single-compressor double-condenser. The air and water source double-condenser heat pump unit with the authorized publication number of CN101532743B (200910022000.0) can realize heating working conditions all the time when the unit realizes two working condition cycles of refrigeration or heating in one functional interval by controlling the electromagnetic valve, and can regulate the flow flowing through the first heat exchanger for heating hot water according to different hot water loads by regulating the opening of the valve, so that the refrigerating working medium can fully release heat, the system valve is relatively more, and certain hysteresis exists in the process of switching flow direction and regulating flow.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide an intermediate cooling heat recovery triple heat pump system, which can simultaneously cool down superheated steam discharged from a low-pressure stage compressor by controlling cooling temperatures of an intercooler and a regenerator, thereby implementing a two-stage compression intermediate cooling process and further improving compressor efficiency; the refrigeration and heating coefficients of the cycle are improved by heat recovery.
In order to achieve the above object, the present invention provides an intermediate cooling heat recovery triple heat pump system, the system comprising: the low-pressure stage compressor, the high-pressure stage compressor, the intercooler, the first heat exchanger, the heat recoverer, the heat regenerator, the second heat exchanger and the four-way valve are connected through pipelines;
and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on connecting pipes of the inlet of the intercooler and the inlet of the heat regenerator.
According to the intermediate cooling heat recovery triple heat pump system, the first heat exchanger, the second heat exchanger, the low-pressure stage compressor and the heat recoverer are all connected with the four-way valve.
According to the intermediate cooling heat recovery triple heat supply pump system, one end of the first heat exchanger is connected with the four-way valve, and the other end of the first heat exchanger is connected with the heat regenerator.
The invention is applicable to the technical field of refrigeration equipment, and provides an intermediate cooling heat recovery triple-generation heat pump system, which comprises: the low-pressure stage compressor, the high-pressure stage compressor, the intercooler, the first heat exchanger, the heat recoverer, the heat regenerator, the second heat exchanger, the expansion valve and the four-way valve are connected through pipelines; and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on connecting pipes of the inlet of the intercooler and the inlet of the heat regenerator. Therefore, the superheated steam discharged by the low-pressure stage compressor can be cooled by controlling the cooling temperatures of the intercooler and the heat regenerator, the two-stage compression and intermediate cooling process is realized, and the efficiency of the compressor is further improved; the refrigeration and heating coefficients of the cycle are improved by heat recovery.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
FIG. 2A is a schematic diagram illustrating a cooling mode according to an embodiment of the present invention;
FIG. 2B is a schematic diagram illustrating a heating operation according to an embodiment of the present invention;
wherein: 1-a throttle valve; 2-a second solenoid valve; 3-a first solenoid valve; 4-a low pressure stage compressor; 5-a high pressure stage compressor; 6-a four-way valve; 7-a second heat exchanger; 8-an intercooler; 9-a first heat exchanger; 10-a heat recovery unit; 11-a regenerator.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the invention provides an intermediate cooling heat recovery triple heat pump system, which comprises a low-pressure stage compressor 4, a high-pressure stage compressor 5, an intercooler 8, a first heat exchanger 9, a heat recoverer 10, a regenerator 11, a second heat exchanger 7, an expansion valve and a four-way valve 6 which are connected through pipelines. The first electromagnetic valve 3 and the second electromagnetic valve 2 are respectively arranged on connecting pipes of the inlet of the intercooler 8 and the inlet of the regenerator 11, and the refrigerants of the first electromagnetic valve and the second electromagnetic valve come from the low-pressure stage compressor 4. The recycling of the refrigeration waste heat and the improvement of the heating performance are realized through the control of the first electromagnetic valve 3, the second electromagnetic valve 2 and the four-way valve 6. The invention adopts the application technology of the intermediate cooling coupling double-stage compressor to realize the multiple effects of reducing the exhaust temperature, avoiding the lubrication deterioration of the compressor, reducing the overheat loss and improving the efficiency of the unit.
Specifically, the first heat exchanger 9, the second heat exchanger 7, the low-pressure stage compressor 4 and the heat recoverer 10 are all connected with the four-way valve 6. One end of the first heat exchanger 9 is connected with the four-way valve 6, and the other end is connected with the heat regenerator 11.
The specific working principle of the project is as follows:
in combination with fig. 2A and 2B, when the refrigeration cycle is in operation, the second heat exchanger 7 is connected to the inlet C of the four-way valve 6, the outlet B of the four-way valve is connected to the suction port of the low-pressure stage compressor 4, and the refrigerant absorbs heat and evaporates into low-pressure steam (point (1) on lgp-h diagram) in the second heat exchanger, and the low-pressure steam is sucked by the low-pressure stage compressor 4 and compressed into medium-temperature and medium-pressure gas (processes (1) - (2)). At this time, the electromagnetic valve 3 is opened, the electromagnetic valve 2 is closed, the exhaust gas of the low-pressure stage compressor 4 enters the intercooler 8 to be cooled by constant pressure (processes (2) - (3)), and meanwhile, heat is released to heat the domestic water. The cooled refrigerant vapor is compressed by the high-pressure stage compressor 5 for further compression (processes (3) - (4)), the exhaust gas of the high-pressure stage compressor enters the heat recoverer 10 for heat release (processes (4) - (5)), and the released heat heats the domestic water again (namely, tap water firstly enters the intercooler 8 for heating and raising the temperature, and then enters the heat recoverer 10 for further temperature rise, so that a series cascade heating relationship is formed). The heat recoverer is connected with an inlet D of the four-way valve 6, an outlet A of the four-way valve is connected with the first heat exchanger 9, exhaust gas enters the first heat exchanger 9 to condense and release heat to form supercooled high-pressure liquid (processes (5) - (6)), and at the moment, the heat regenerator 11 does not perform heat exchange ((6) point coincides with (7) point, and the electromagnetic valve 2 is closed). The high-pressure liquid is throttled into low-pressure low-temperature liquid (processes (6) - (8)) by the throttle valve 1, and the low-pressure liquid enters the second heat exchanger 7 to absorb heat for refrigeration and is evaporated into low-pressure steam (processes (8) - (1)), so that the low-pressure liquid is circulated repeatedly.
When the heating cycle works, the first heat exchanger 9 takes on the function of an evaporator, while the original second heat exchanger 7 takes on the function of a condenser. The first heat exchanger 9 is connected to the inlet a of the four-way valve 6, the outlet B of the four-way valve is connected to the low-pressure stage compressor 4, and the refrigerant absorbs heat and evaporates into low-pressure steam (point (1) on the lgp-h diagram) in the first heat exchanger 9, and the low-pressure steam is sucked by the low-pressure stage compressor and compressed into medium-temperature and medium-pressure gas (processes (1) - (2)). At this time, the electromagnetic valve 2 is opened, the electromagnetic valve 3 is closed, the exhaust gas of the low-pressure stage compressor enters the heat regenerator 11, the exhaust gas is cooled to be close to a saturated state (about 3K of superheat degree) by constant pressure cooling by controlling the cooling temperature (processes (2) - (3)), sensible heat is released to supplement the heat absorption capacity of the first heat exchanger 9, and further reduction of the evaporation temperature is avoided. The cooled medium pressure vapor is compressed by the high pressure stage compressor 5 for further compression (processes (3) - (4)), and the exhaust gas of the high pressure stage compressor enters the heat recoverer 10 for heat release and cooling (processes (4) - (5)), and the heat is used for heating domestic water. The heat recoverer is connected with the four-way valve inlet D, the four-way valve outlet C is connected with the second heat exchanger 7, the exhaust gas enters the second heat exchanger 7 to condense and release heat (processes (5) - (8)), and the released heat is used for supplying heat in winter. The condensed supercooled high-pressure liquid is throttled into low-temperature low-pressure liquid through a throttle valve 1 (processes (8) - (7)), the low-temperature low-pressure liquid enters a heat regenerator 11 for reducing the exhaust temperature of a low-pressure stage compressor (processes (7) - (6)), a main low-temperature low-pressure two-phase flow after absorbing heat in the heat regenerator 11 enters a first heat exchanger 9 for absorbing heat and evaporating into superheated low-pressure steam (processes (6) - (1)), and the cycle is repeated.
Another implementation form is: the regenerator 11 moves to the position between the first heat exchanger 9 and the four-way reversing valve 6, and other connection relations are the same.
The invention has the advantages that: according to the intermediate cooling heat recovery triple heat supply pump system provided by the invention, the waste heat recovery is realized through the heat recoverer and the intermediate cooler, and the domestic hot water supply is always kept during the cooling and heating circulation in winter and summer. Meanwhile, the exhaust gas of the low-pressure-stage compressor is cooled to be close to a saturated state (about 3K in superheat degree) by controlling the heat exchange quantity of the intercooler and the heat regenerator, so that the incomplete cooling process in the middle of two-stage compression is realized, the exhaust gas temperature of the compressor is reduced, the evaporation temperature of an ultralow-temperature working condition is improved, the total power consumption of the compressor is reduced, and the efficiency of the compressor is improved; by additionally arranging the heat recoverer, the heat regenerator and the intercooler, the cascade high-efficiency utilization of energy is realized, and the unit efficiency and the COP value of the system are improved
In summary, the present invention is suitable for the technical field of refrigeration equipment, and provides an intermediate cooling heat recovery triple heat pump system, which comprises: the low-pressure stage compressor, the high-pressure stage compressor, the intercooler, the first heat exchanger, the heat recoverer, the heat regenerator, the second heat exchanger and the four-way valve are connected through pipelines; and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on connecting pipes of the inlet of the intercooler and the inlet of the heat regenerator. Therefore, the superheated steam discharged by the low-pressure stage compressor can be cooled by controlling the cooling temperatures of the intercooler and the heat regenerator, the two-stage compression and intermediate cooling process is realized, and the efficiency of the compressor is further improved; the refrigeration and heating coefficients of the cycle are improved by heat recovery.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. An intermediate cooling heat recovery triple co-generation heat pump system, the system comprising: the low-pressure stage compressor, the high-pressure stage compressor, the intercooler, the first heat exchanger, the heat recoverer, the heat regenerator, the second heat exchanger and the four-way valve are connected through pipelines;
a first electromagnetic valve and a second electromagnetic valve are respectively arranged on a connecting pipe of an inlet of the intercooler and an inlet of the heat regenerator;
the first heat exchanger, the second heat exchanger, the low-pressure stage compressor and the heat recoverer are all connected with the four-way valve;
one end of the first heat exchanger is connected with the four-way valve, and the other end of the first heat exchanger is connected with the heat regenerator;
the working principle of the heat pump system is as follows: when the refrigeration cycle works, the second heat exchanger is connected with the inlet C of the four-way valve, the outlet B of the four-way valve is connected with the suction inlet of the low-pressure stage compressor, the refrigerant absorbs heat and evaporates into low-pressure steam in the second heat exchanger, and the low-pressure steam is sucked by the low-pressure stage compressor and compressed into medium-temperature medium-pressure gas; at the moment, the first electromagnetic valve is opened, the second electromagnetic valve is closed, the exhaust gas of the low-pressure stage compressor enters the intercooler to be cooled by constant pressure, and meanwhile, heat is released to heat domestic water; the cooled refrigerant steam is further compressed by a high-pressure stage compressor, the exhaust gas of the high-pressure stage compressor enters a heat recoverer to release heat, and the released heat is used for heating domestic water again; the heat recoverer is connected with an inlet D of the four-way valve, an outlet A of the four-way valve is connected with the first heat exchanger, exhaust gas enters the first heat exchanger to condense and release heat to form supercooled high-pressure liquid, and the heat regenerator does not exchange heat at the moment; the high-pressure liquid is throttled into low-pressure low-temperature liquid by a throttle valve, and the low-pressure liquid enters a second heat exchanger to absorb heat, refrigerate and evaporate into low-pressure steam, so that the low-pressure liquid is circulated repeatedly;
when the heating cycle works, the first heat exchanger is used as an evaporator, and the second heat exchanger is used as a condenser; the first heat exchanger is connected with an inlet A of the four-way valve, an outlet B of the four-way valve is connected with the low-pressure stage compressor, the refrigerant absorbs heat and evaporates into low-pressure steam in the first heat exchanger, and the low-pressure steam is sucked by the low-pressure stage compressor and compressed into medium-temperature and medium-pressure gas; at the moment, the second electromagnetic valve is opened, the first electromagnetic valve is closed, the exhaust gas of the low-pressure stage compressor enters the heat regenerator, the exhaust gas is cooled to be close to a saturated state by constant pressure by controlling the cooling temperature, sensible heat is released to supplement the heat absorption capacity of the first heat exchanger, and further reduction of the evaporating temperature is avoided; the cooled medium-pressure steam is further compressed by a high-pressure stage compressor, and the exhaust gas of the high-pressure stage compressor enters a heat recoverer for heat release and cooling, and the heat is used for heating domestic water; the heat recoverer is connected with the four-way valve inlet D, the four-way valve outlet C is connected with the second heat exchanger, the exhaust gas enters the second heat exchanger to condense and release heat, and the released heat is used for supplying heat in winter; the condensed supercooled high-pressure liquid is throttled into low-temperature low-pressure liquid by a throttle valve, the low-temperature low-pressure liquid enters a regenerator for reducing the exhaust temperature of a low-pressure stage compressor, and the low-temperature low-pressure two-phase flow refrigerant after absorbing heat in the regenerator enters a first heat exchanger for absorbing heat and evaporating into superheated low-pressure steam, so that the refrigerant is circulated repeatedly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011171315.4A CN112325509B (en) | 2020-10-28 | 2020-10-28 | Intermediate cooling heat recovery triple heat supply pump system |
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| CN202011171315.4A CN112325509B (en) | 2020-10-28 | 2020-10-28 | Intermediate cooling heat recovery triple heat supply pump system |
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| CN112325509A CN112325509A (en) | 2021-02-05 |
| CN112325509B true CN112325509B (en) | 2023-06-27 |
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| CN114857696A (en) * | 2022-06-02 | 2022-08-05 | 新科环保科技有限公司 | Magnetic suspension centrifugal air conditioning system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102348942A (en) * | 2009-03-13 | 2012-02-08 | 大金工业株式会社 | Heat pump system |
| CN202229465U (en) * | 2011-07-05 | 2012-05-23 | 林昌元 | Solar-powered heat pump unit capable of freely recovering excess heat |
| CN108759156A (en) * | 2018-07-20 | 2018-11-06 | 天津商业大学 | Not exclusively cooling two-stage compression heat pump system among second throttle |
| CN110044093A (en) * | 2019-03-12 | 2019-07-23 | 天津大学 | Two-stage Compression second vapor injection CO2Three-level backheat chiller-heat pump/refrigeration system |
| CN211119989U (en) * | 2019-09-05 | 2020-07-28 | 天津商业大学 | Multi-stage compression multi-condenser intermediate throttling incomplete cooling medium-high temperature heat pump system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0926226A (en) * | 1995-07-11 | 1997-01-28 | Nkk Corp | Refrigeration apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102348942A (en) * | 2009-03-13 | 2012-02-08 | 大金工业株式会社 | Heat pump system |
| CN202229465U (en) * | 2011-07-05 | 2012-05-23 | 林昌元 | Solar-powered heat pump unit capable of freely recovering excess heat |
| CN108759156A (en) * | 2018-07-20 | 2018-11-06 | 天津商业大学 | Not exclusively cooling two-stage compression heat pump system among second throttle |
| CN110044093A (en) * | 2019-03-12 | 2019-07-23 | 天津大学 | Two-stage Compression second vapor injection CO2Three-level backheat chiller-heat pump/refrigeration system |
| CN211119989U (en) * | 2019-09-05 | 2020-07-28 | 天津商业大学 | Multi-stage compression multi-condenser intermediate throttling incomplete cooling medium-high temperature heat pump system |
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