CN104776483A - Building-type concentrated heating heat pump system substituting for small-size boiler - Google Patents
Building-type concentrated heating heat pump system substituting for small-size boiler Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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Abstract
The invention relates to a building-type concentrated heating heat pump system substituting for a small-size boiler. The building-type concentrated heating heat pump system comprises a plurality of compressors, an exhaust pipeline, an air suction pipeline, an air supplementing pipeline, an oil supply pipeline, an oil separator, a water-cooling condenser, a liquid-storage supercooler, second-stage throttling elements, a plurality of air-cooling evaporators, a gas-liquid separator, a liquid discharge barrel, a working medium pump, first-stage throttling elements, an oil storage device and the like; each compressor is provided with an air supplementing hole and an oil supply hole; the compressors are connected in parallel, and the air-cooling evaporators are connected in parallel; each air-cooling evaporator is provided with a corresponding electromagnetic valve and the corresponding throttling element; an outlet of each air-cooling evaporator is connected with an inlet of the corresponding air-cooling evaporator through an electromagnetic valve, the liquid discharge barrel, the working medium pump and the corresponding throttling element; an air outlet in the top of the liquid storage supercooler is connected with the air supplementing pipeline through the corresponding throttling element; an oil outlet in the bottom of the oil separator is connected with the oil supply pipeline through the oil storage device. According to the building-type concentrated heating heat pump system disclosed by the invention, the number of the compressors and the evaporators put into operation can be adjusted in real time according to the change of the atmospheric temperature, and meanwhile, the defrosting operation alternately carried out by the evaporators in turn is realized by the liquid working medium.
Description
Technical field
The present invention relates to the building formula central heating heat pump of building central heating technical field, particularly replacement for small boiler.
Background technology
By the heating means of electrically driven (operated) heat pump as building, replace traditional miniature coal/oil burning boiler heating, the energy utilization efficiency of winter heating can be increased substantially, and can effectively reduce or stop to airborne release pollutant, particularly in the key city in the colder area of weather, this effect using electric heat pump to bring is especially obvious.Making electrically driven (operated) heat pump can at stable and high effective operation under cold climate conditions, just requiring that heat pump is when producing larger temperature rise, its caloric value decay delivery temperature that is less, compressor be stable and lower, energy utilization efficiency is higher.But traditional single stage compress heat pump cannot meet above-mentioned requirements.
In order to overcome the deficiency that conventional heat pump system exists, Chinese invention patent 200510063463.3 proposes a kind of heat pump with injector and liquid storage subcooler or refrigeration system, this heat pump adopts compressor and the liquid storage subcooler of band gas compensation function, couple together between them with injector, form the work bypass of heat pump, i.e. tonifying Qi loop.Compressor, condenser, expansion valve and evaporimeter then form its work main road, are conventional heat pump system.With the working fluid of high pressure refrigerant vapor as injector crossing cold liquid reservoir top, the low pressure refrigerant vapor of injection evaporator outlet, compression refrigerant steam in interruption-forming is gone out at injector, and directly spray in compression chamber or intermediate cavity by compressor gas supplementing opening, also namely this heat pump, according to accurate two-stage compression-injection combined-circulation work, effectively can increase worst cold case heating capacity and the Energy Efficiency Ratio of heat pump.Therefore, this system can at cold district efficiently, stably whole year operation, can clean as traditional heating district, efficiently, heating technology means easily.
Technique scheme solves from know-why the problem that heat pump runs at cold climate district efficient stable, but it directly applies in engineering reality, also there is obvious weak point.First, it does not consider the energy adjustment problem in heat pump actual motion.The calorific requirement of building heating reduces with environment temperature and increases, and the heating capacity of heat pump reduces with environment temperature and reduces, and when only having the two coupling good, the economy of operation of heat pump and energy-saving effect just can be guaranteed.Secondly, it does not consider the defrosting problem that heat pump runs in low temperature environment.Run in heat pump winter low temperature environment, evaporimeter frosting is relatively more serious, directly has influence on the reliability of operation of heat pump; Its three, it does not consider to heat in heat pump actual motion the transfer problem with refrigeration work pattern.Buildings in general, except heat supply in winter demand, also has the demand of summer cooling, heats/the mechanism of refrigeration work patten transformation if increased, and when cost increases a little, can expand the function of heat pump, improve the utilization rate of equipment.If the problems referred to above can not get reasonable solution, applying and profit point of patent 2,005 1 0063463.3 will be had influence on.
Summary of the invention
Object of the present invention, for above-mentioned problems of the prior art, there is provided a kind of structure simple, be convenient to energy adjustment and working mode change, defrosting effect is good, and process easy for installation, energy utilization efficiency is high, feasibility is high, the building formula central heating heat pump of the replacement for small boiler of operating condition broadness.
In order to realize above-mentioned goal of the invention, technical scheme of the present invention realizes as follows: a kind of building formula central heating heat pump of replacement for small boiler, mainly comprises compressor 1, gas exhaust piping 2, suction line 3, tonifying Qi pipeline 4, oil feed line 5, oil eliminator 6, water-cooled condenser 7, liquid storage subcooler 8, magnetic valve A9, magnetic valve B10, two-step throttle element 11, wind-cooled evaporator 12, magnetic valve C13, magnetic valve D14, gas-liquid separator 15, discharge opeing bucket 16, working medium pump 17, one-level restricting element 18 and oil container 19 etc.It is characterized in that: every compressor 1 is all with gas supplementing opening and oil-feed port, and multiple compressors 1 exhaust outlet is connected with gas exhaust piping 2, air entry is connected with suction line 3, gas supplementing opening is connected with tonifying Qi pipeline 4, oil-feed port is connected with oil feed line 5; Wind-cooled evaporator 12 is connected in parallel for multiple stage, and every platform wind-cooled evaporator 12 all configures corresponding magnetic valve A9, magnetic valve B10, two-step throttle element 11, magnetic valve C13 and magnetic valve D14; Gas exhaust piping 2 connects with oil eliminator 6 import, oil eliminator 6 outlet connects with the import of water-cooled condenser 7 working medium, condenser 7 sender property outlet connects with liquid storage subcooler 8 import, liquid storage subcooler 8 liquid outlet connects with the import of magnetic valve A9 and magnetic valve B10, two-step throttle element 11 is connect after magnetic valve B10, the outlet of two-step throttle element 11 and magnetic valve A9 connects with wind-cooled evaporator 12 import, and wind-cooled evaporator 12 outlet connects with the import of magnetic valve C13 and magnetic valve D14; The outlet of magnetic valve C13 is connected with suction line 3 by gas-liquid separator 15; The outlet of magnetic valve D14 is connected with working medium pump 17 import by discharge opeing bucket 16, and working medium pump 17 outlet is received on the pipeline between magnetic valve B10 and two-step throttle element 11; The gas outlet at liquid storage subcooler 8 top is connected with tonifying Qi pipeline 4 by one-level restricting element 18; Oil-out bottom oil eliminator 6 connects with oil container 19 import, and oil container 19 outlet connects with oil feed line 5, and oil container 19 top communicates with suction line 3.
Described building formula central heating heat pump, by increasing four-way change-over valve 20 and several valve members such as corresponding triple valve E21, three grades of restricting elements 22, triple valve F23 and triple valve G24, can realize working medium and flowing to change.Four-way change-over valve connected mode is as follows: import 201 exports with oil eliminator 6 and connects, and outlet 203 connects with gas-liquid separator 15 entrance, and interface 202 exports with wind-cooled evaporator 12 and connects, and interface 204 connects with water-cooled condenser 7 entrance.
Described building formula central heating heat pump, is characterized in that, with several triple valves or two-port valve, can carry out alternative four-way change-over valve, realizes working medium and flows to and change.
Described building formula central heating heat pump, the installation site of one-level restricting element 18 can move to its feed tube from the escape pipe of liquid storage subcooler 8.
Described building formula central heating heat pump, can increase heat exchanger 28, carrys out gas-liquid phase-splitting heat exchange in alternative liquid storage subcooler 8 with the septate heat transfer of working medium in heat exchanger.It is as follows that heat exchanger 28 obtains connected mode: condensed worker quality liquid is divided into main and auxiliary two tunnels to enter heat exchanger 28 respectively, one-level restricting element 18 is received on the bypass before entering heat exchanger 28, and the main and auxiliary way outlet of heat exchanger connects with liquid storage subcooler 8 tonifying Qi pipeline 4 respectively.
Described building formula central heating heat pump, is characterized in that, working medium pump 17 exports and also can connect with the import of magnetic valve A9 and magnetic valve B10.
Described building formula central heating heat pump, is characterized in that, can substitute two adjacent and the magnetic valve that switching sequence is contrary or two-port valves with a triple valve.
Described compressor, is characterized in that, screw, centrifugal, piston type or vortex.
Described building formula central heating heat pump, is characterized in that, one-level restricting element, two-step throttle element and three grades of restricting elements, but throttle pipe, throttle orifice or choke valve.
The present invention adopts multiple compressors and the multiple stage wind-cooled evaporator of parallel way, and working medium pump liquid defrost system, each parts form the working cycles loop closed according to above-mentioned connection order, the performance loop flowing that working medium is being closed, the low grade heat energy in air is absorbed in wind-cooled evaporator, after promoting temperature, in water-cooled condenser, release, to heating hot water, also can provide air conditioner cold water for building.The more important thing is, the compressor that this heat pump can adjust in real time according to the change of atmospheric temperature and the number of units that evaporimeter is devoted oneself to work, make heat pump heating capacity and heating calorific requirement reach Dynamic Matching, obtain good performance driving economy and energy-saving effect.The loop that magnetic valve D, discharge opeing bucket and working medium pump are formed, can realize the defrosting operation of evaporimeter one after the other, not only simplify defrost system with worker quality liquid, and make defrost process to the impact of heat pump and the heating water temperature fluctuation that causes all very little.
Accompanying drawing explanation
Fig. 1 is the anatomical connectivity figure of the embodiment of the present invention one.
Fig. 2 is the anatomical connectivity figure of the embodiment of the present invention two.
Fig. 3 is the anatomical connectivity figure of the embodiment of the present invention three.
Number in the figure illustrates:
1-compressor, 2-gas exhaust piping, 3-suction line, 4-tonifying Qi pipeline, 5-oil feed line, 6-oil eliminator, 7-water-cooled condenser, 8-liquid storage subcooler, 9-magnetic valve A, 10-magnetic valve B, 11-two-step throttle element, 12-wind-cooled evaporator, 13-magnetic valve C, 14-magnetic valve D, 15-gas-liquid separator, 16-discharge opeing bucket, 17-working medium pump, 18 one-level restricting elements, 19-oil container, 20-four-way change-over valve, 21-triple valve E, 22-three grades of restricting elements, 23-triple valve F, 24-triple valve G, 25-triple valve H, 26-triple valve I, 27-stop valve, 28-heat exchanger, 29-triple valve J, 30-triple valve K, 29-triple valve L, 30-triple valve M
Detailed description of the invention
Embodiment one
1. the central heating heat pump of this embodiment is mainly used in construction area at 500M
2~ 50,000M
2between the heating of building or some next-door neighbour's building or hot water, primarily of three compositions such as helical-lobe compressor 1, gas exhaust piping 2, suction line 3, tonifying Qi pipeline 4, oil feed line 5, oil eliminator 6, water-cooled condenser 7, liquid storage subcooler 8, magnetic valve A9, magnetic valve B10, two-step throttle element 11, four wind-cooled evaporators 12, magnetic valve C13, magnetic valve D14, gas-liquid separator 15, discharge opeing bucket 16, working medium pump 17, one-level restricting element 18 and oil containers 19 with gas supplementing opening and oil-feed port.Three compressors 1 are connected in parallel, and namely its exhaust outlet, air entry, gas supplementing opening, oil-feed port are respectively with gas exhaust piping 2, suction line 3, tonifying Qi pipeline 4, be connected with oil feed line 5.Wind-cooled evaporator 12 is four and is connected in parallel, and every platform wind-cooled evaporator 12 all configures corresponding magnetic valve A9, magnetic valve B10, two-step throttle element 11, magnetic valve C13 and magnetic valve D14.The connected mode of this system is as follows: gas exhaust piping 2 connects with oil eliminator 6 import, oil eliminator 6 outlet connects with the import of water-cooled condenser 7 working medium, condenser 7 sender property outlet connects with liquid storage subcooler 8 inlet, liquid storage subcooler 8 liquid outlet connects with the import of magnetic valve A9 and magnetic valve B10, two-step throttle element 11 is connect after magnetic valve B10, the outlet of two-step throttle element 11 and magnetic valve A9 connects with wind-cooled evaporator 12 import, and wind-cooled evaporator 12 outlet connects with the import of magnetic valve C13 and magnetic valve D14; The outlet of magnetic valve C13 is connected with suction line 3 by gas-liquid separator 15; The outlet of magnetic valve D14 is connected with working medium pump 17 import by discharge opeing bucket 16, and working medium pump 17 outlet is received on the pipeline between magnetic valve B10 and two-step throttle element 11; The gas outlet at liquid storage subcooler 8 top is connected with tonifying Qi pipeline 4 by one-level restricting element 18; Oil-out bottom oil eliminator 6 connects with oil container 19 import, and oil container 19 outlet connects with oil feed line 5.Each parts form the working cycles loop closed according to above-mentioned connection order, the built-in working medium in this loop and lubricating oil, during compressor operating, the HTHP Working medium gas of discharging makes working medium and lubricating oil separation through oil eliminator 6, isolated lubricant oil collection is for subsequent use to oil container 19, Working medium gas enters water-cooled condenser 7 heat release to heating hot water, working fluid condenses enters liquid storage subcooler 8 after becoming liquid, working medium produces gas, liquid phase-splitting in liquid storage subcooler 8, and namely gas phase exists the upper space of liquid storage subcooler 8 and lower space accumulates liquid phase working fluid.The Working medium gas at liquid storage subcooler 8 top flows into tonifying Qi pipeline 4 after one-level restricting element 18 reducing pressure by regulating flow, is sucked afterwards by the gas supplementing opening of compressor.Four wind-cooled evaporator 12 parallel connection configurations of native system, the frosting situation of Sensor monitoring evaporimeter, and judge that evaporimeter is the need of entering defrosting mode.When evaporimeter defrosts, the magnetic valve A9 of this evaporimeter and magnetic valve D14 opens and magnetic valve B10 and magnetic valve C13 disconnects; Evaporimeter defrosting is entered through magnetic valve A9 from the higher temperature worker quality liquid of liquid storage subcooler 8, discharge opeing bucket 16 is pooled to from evaporimeter worker quality liquid out, be transported to the import of two-step throttle element 11 by working medium pump 17, after throttling, enter the evaporimeter being in normal operating conditions; Being in the evaporimeter of defrosting mode, is high-pressure working medium liquid after its two-step throttle element 11, and therefore working medium pump 17 carries the liquid of coming cannot continue flowing backward by two-step throttle element 11.Like this, when the worker quality liquid before or some evaporimeter two-step throttles defrosts, and all the other evaporimeters can also work as usual, the Defrost mode of this evaporimeter one after the other to the impact of system and the heating water temperature fluctuation that causes all very little.Every compressor all configures oil level controllers, and when oil level is higher than higher limit, oil feed line is cut off, fuel cut-off; When oil level is lower than lower limit, oil feed line is opened, to compressor oil-supplying.Like this, according to the oil mass demand of every compressor, oil container 19 can by oil feed line 5 in time to every compressor repairing.The regulative mode of this heat pump is as follows: with gas working medium temperature te in temperature sensor difference Real-Time Monitoring current atmospheric temperature t and suction line, and be sent to the controller of unit, suppose t1, t2, t3 represents different temperature values respectively, and such as t1 is 10 DEG C, and t2 is 0 DEG C, t3 is-10 DEG C, but is not limited to this setting.And t1>t2>t3.As t>t1, only open a compressor by controller; As t1>t>t2, only open two compressors by controller; As t<t3, only open three compressors by controller.Suppose a1, a2, a3, a4 represent different numerical value respectively, and a1<a2<a3<a4, such as t1 is 10 DEG C, and t2 is 0 DEG C, and t3 is-10 DEG C, but is not limited to this setting.Such as a1 is 2 DEG C, and a2 is 3 DEG C, and a3 is 4 DEG C, and a4 is 5 DEG C but is not limited to this to arrange.Dt＝t-te。As a2>Dt>a1, open an evaporimeter by controller; As a3>Dt>a2, open two evaporimeters by controller; As a4>Dt>a3, open three evaporimeters by controller; As Dt>a4, open four compressors by controller; During defrosting, all evaporimeters all should be in running order.By above-mentioned control program, native system can according to the actual demand of heating, the adjustment compressor of actual motion and the number of units of evaporimeter in real time, makes heating capacity and the heating calorific requirement coupling of system, ensures its performance driving economy and energy-saving effect optimization.
Embodiment two
With reference to figure 2, the heat pump of embodiment two, similar with the heat pump of embodiment one, difference adds four-way change-over valve 20 and corresponding triple valve E21, three grades of restricting elements 22, triple valve F23 and triple valve G24; One-level restricting element 18, moves to its feed tube from liquid storage subcooler 8 escape pipe; Working medium pump 17 exports and directly connects with the import of magnetic valve A9 and magnetic valve B10.Four-way change-over valve connected mode: import 201 exports with oil eliminator 6 and connects, outlet 203 connects with gas-liquid separator 15 entrance, and interface 202 exports with wind-cooled evaporator 12 and connects, and interface 204 connects with water-cooled condenser 7 entrance.Like this, this heat pump can realize the change that working medium flows to, and can not only provide heating hot water, also can provide air conditioner cold water to building.During heating operation, 201 mouthfuls of four-way change-over valve communicate with 204 mouthfuls, and 203 mouthfuls communicate with 202 mouthfuls, meanwhile, 212 mouthfuls of triple valve E logical, 213 mouthfuls break, 232 mouthfuls of triple valve F logical, 233 mouthfuls break, 242 mouthfuls of triple valve G logical, 243 mouthfuls break, at this moment water-cooled condenser provides hot water; During refrigerating operaton, 201 mouthfuls of four-way change-over valve communicate with 202 mouthfuls, and 203 mouthfuls communicate with 204 mouthfuls, meanwhile, 212 mouthfuls of triple valve E disconnected, 213 mouthfuls lead to, 232 mouthfuls of triple valve F disconnected, 233 mouthfuls lead to, 242 mouthfuls of triple valve G disconnected, 243 mouthfuls lead to, at this moment water-cooled condenser provides cold water.Like this, this heat pump just can realize the object of heat supply in winter, summer cooling, extends its function.
With reference to figure 3, the heat pump of embodiment three, similar with the heat pump of embodiment two, difference is with triple valve H25 replacement of solenoid valve A9 and magnetic valve B10, with triple valve I26 replacement of solenoid valve C13 and magnetic valve D14, increases stop valve 27; Four-way change-over valve 20 is substituted with triple valve J29, triple valve K30, triple valve L31 and triple valve M31; Increase heat exchanger 28, condensed worker quality liquid is divided into main and auxiliary two tunnels before entering heat exchanger 28, one-level restricting element 18 moves to the bypass import of heat exchanger 28, the septate heat transfer of main and auxiliary road working medium in heat exchanger, substitute gas-liquid phase-splitting heat exchange in liquid storage subcooler 8, its course of work is: bypass liquid is after one-level restricting element 18 reducing pressure by regulating flow, enter heat exchanger 28, gas is become after absorbing the heat of main road liquid, and flow into tonifying Qi pipeline 4, and main flow liquid through heat exchanger cross cold after enter liquid storage subcooler 8.Other parts are identical with embodiment two.Like this, the working medium in tonifying Qi loop with enter the working medium of evaporimeter in the heat exchange of heat exchanger midfeather, be conducive to the stability improving this system cloud gray model.
Claims (9)
1. the building formula central heating heat pump of a replacement for small boiler, comprise compressor (1), gas exhaust piping (2), suction line (3), tonifying Qi pipeline (4), oil feed line (5), oil eliminator (6), water-cooled condenser (7), liquid storage subcooler (8), magnetic valve A (9), magnetic valve B (10), two-step throttle element (11), wind-cooled evaporator (12), magnetic valve C (13), magnetic valve D (14), gas-liquid separator (15), discharge opeing bucket (16), working medium pump (17), one-level restricting element (18) and oil container (19),
It is characterized in that: every compressor (1) is all with gas supplementing opening and oil-feed port, and multiple compressors (1) exhaust outlet is connected with gas exhaust piping (2), air entry is connected with suction line (3), gas supplementing opening is connected with tonifying Qi pipeline (4), oil-feed port is connected with oil feed line (5), wind-cooled evaporator (12) is connected in parallel for multiple stage, and every platform wind-cooled evaporator (12) all configures magnetic valve A (9), magnetic valve B (10), two-step throttle element (11), magnetic valve C (13) and magnetic valve D (14), gas exhaust piping (2) connects with oil eliminator (6) import, oil eliminator (6) outlet connects with water-cooled condenser (7) working medium import, condenser (7) sender property outlet connects with liquid storage subcooler (8) import, liquid storage subcooler (8) liquid outlet connects with the import of magnetic valve A (9) and magnetic valve B (10), two-step throttle element (11) is connect after magnetic valve B (10), the outlet of two-step throttle element (11) and magnetic valve A (9) connects with wind-cooled evaporator (12) import, wind-cooled evaporator (12) outlet connects with the import of magnetic valve C (13) and magnetic valve D (14), the outlet of magnetic valve C (13) is connected with suction line (3) by gas-liquid separator (15), the outlet of magnetic valve D (14) is connected with working medium pump (17) import by discharge opeing bucket (16), and working medium pump (17) outlet is received on the pipeline between magnetic valve B (10) and two-step throttle element (11), the gas outlet at liquid storage subcooler (8) top is connected with tonifying Qi pipeline (4) by one-level restricting element (18), the oil-out of oil eliminator (6) bottom connects with oil container (19) import, and oil container (19) outlet connects with oil feed line (5), each parts form the working cycles loop closed according to above-mentioned connection order, the performance loop flowing that working medium is being closed, in wind-cooled evaporator (12), absorb the low grade heat energy in air, discharge to heating hot water after promoting temperature in water-cooled condenser (7), the number of units that the compressor of this heat pump and evaporimeter are devoted oneself to work adjusts in real time according to the change of atmospheric temperature, makes heat pump heating capacity and heating calorific requirement reach Dynamic Matching, the loop that magnetic valve D, discharge opeing bucket and working medium pump are formed, can realize the defrosting operation of evaporimeter one after the other with worker quality liquid.
2. system according to claim 1, it is characterized in that, by increasing four-way change-over valve (20) and triple valve E (21), three grades of restricting elements (22), triple valve F (23) and triple valve G (24), realizing working medium and flowing to and change; Four-way change-over valve connected mode is as follows: import (201) exports with oil eliminator (6) and connects, outlet (203) connects with gas-liquid separator (15) entrance, first interface (202) exports with wind-cooled evaporator (12) and connects, and the second interface (204) connects with water-cooled condenser (7) entrance.
3. system according to claim 2, is characterized in that, with several triple valves or two-port valve, carrys out alternative four-way change-over valve, realizes working medium and flows to change.
4. system according to claim 1, is characterized in that, the installation site of one-level restricting element (18) moves to its feed tube from the escape pipe of liquid storage subcooler (8).
5. system according to claim 1, is characterized in that, increases heat exchanger (28), carrys out gas-liquid phase-splitting heat exchange in alternative liquid storage subcooler (8) with the septate heat transfer of working medium in heat exchanger; The connected mode of heat exchanger (28) is as follows: condensed worker quality liquid is divided into main and auxiliary two tunnels to enter heat exchanger (28) respectively, one-level restricting element (18) is received and is entered on the front bypass of heat exchanger (28), and the main and auxiliary way outlet of heat exchanger connects with liquid storage subcooler (8) tonifying Qi pipeline (4) respectively.
6. system according to claim 1, is characterized in that, working medium pump (17) exports to become and connects with the import of magnetic valve A (9) and magnetic valve B (10).
7. system according to claim 1, is characterized in that, substitutes two adjacent and the magnetic valve that switching sequence is contrary or two-port valves with a triple valve.
8. system according to claim 1, compressor is screw, centrifugal, piston type or vortex.
9. system according to claim 1, is characterized in that, one-level restricting element, and two-step throttle element and three grades of restricting elements are throttle pipe, throttle orifice or choke valve.
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Cited By (5)
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| CN106096248A (en) * | 2016-06-03 | 2016-11-09 | 国家电网公司 | The selection method of the optimal heating system under varying environment |
| CN106524558A (en) * | 2016-11-10 | 2017-03-22 | 青岛海尔中央空调有限公司 | Multi-split heat pump system based on three-stage centrifugal compressor |
| CN108197775A (en) * | 2017-12-11 | 2018-06-22 | 北京首都机场动力能源有限公司 | A kind of comprehensive energy information management system and method |
| CN113685891A (en) * | 2021-07-16 | 2021-11-23 | 河北壬昌科技有限公司 | Intelligent parallel group control heating system |
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| CN105202609A (en) * | 2015-10-21 | 2015-12-30 | 北京工业大学 | Heat pump system capable of using atmospheric natural cold source to increase working medium liquid supercooling degree and used for heat supply |
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| CN106524558A (en) * | 2016-11-10 | 2017-03-22 | 青岛海尔中央空调有限公司 | Multi-split heat pump system based on three-stage centrifugal compressor |
| CN106524558B (en) * | 2016-11-10 | 2023-09-29 | 青岛海尔中央空调有限公司 | Multi-split heat pump system based on three-stage centrifugal compressor |
| CN108197775A (en) * | 2017-12-11 | 2018-06-22 | 北京首都机场动力能源有限公司 | A kind of comprehensive energy information management system and method |
| CN108197775B (en) * | 2017-12-11 | 2021-11-23 | 北京首都机场动力能源有限公司 | Comprehensive energy information management system and method |
| CN113685891A (en) * | 2021-07-16 | 2021-11-23 | 河北壬昌科技有限公司 | Intelligent parallel group control heating system |
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