CN101806519B - Wide-temperature high-efficiency air source heat pump unit with anti-frosting function and operating method thereof - Google Patents
Wide-temperature high-efficiency air source heat pump unit with anti-frosting function and operating method thereof Download PDFInfo
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- CN101806519B CN101806519B CN2010101501536A CN201010150153A CN101806519B CN 101806519 B CN101806519 B CN 101806519B CN 2010101501536 A CN2010101501536 A CN 2010101501536A CN 201010150153 A CN201010150153 A CN 201010150153A CN 101806519 B CN101806519 B CN 101806519B
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Abstract
The invention relates to an air source heat pump unit and an operating method thereof. A compressor is communicated with an indoor heat exchanger through a first on-and-off valve and a four-way reversing valve; the indoor heat exchanger is connected with a bidirectional liquid accumulator through a first one-way valve; one path is connected to the compressor through an anti-frosting coil, a third throttle valve, an outdoor heat exchanger, the four-way reversing valve, the bidirectional liquid accumulator and a second on-and-off valve; the other path is connected to the compressor through an electromagnetic valve, a second throttle valve and the second on-and-off valve; the first one-way valve is connected in parallel with the first throttle valve; the third throttle valve is connected in parallel with a second one-way valve; the compressor is communicated with the outdoor heat exchanger through the first on-and-off valve and the four-way reversing valve; and the outdoor heat exchanger is connected with the bidirectional liquid accumulator through the second one-way valve and the anti-frosting coil, and then is connected to the compressor through the first throttle valve, the indoor heat exchanger, the four-way reversing valve, the bidirectional liquid accumulator, and the second on-and-off valve. The air source heat pump unit has the advantages of wide temperature application range, frosting delay, and high-efficiency operation all year round.
Description
Technical field
The present invention relates to a kind of net for air-source heat pump units and operation method thereof.
Background technology
Present stage, the operational effect of air source heat pump was also undesirable, and its reason mainly is that the low temperature adaptability of air source heat pump is poor, and Another reason is the frosting and the defrosting of air source heat pump.
See from the principle of steam compression type refrigeration; When air source heat pump was applied to cold district, along with the reduction of outdoor environment temperature, the unit compression ratio raise; Volumetric efficiency reduces; Refrigerant mass fluxes descends, and heating load sharply reduces, and the compressor exhaust temperature is too high can't normally to move unit or the operational reliability reduction; Add that leaving air temp reduces, particularly indoor temperature reduces during defrosting, has had a strong impact on the comfortableness of indoor environment.
The frosting of outdoor heat exchanger, defrosting cause the stability and the reliability variation of net for air-source heat pump units operation.Frosting mainly shows two aspects to the negative effect of the operation generation of net for air-source heat pump units: the formation that is the frost layer has on the one hand increased thermal conduction resistance, has reduced the heat transfer coefficient of heat exchanger; Be that the existence of frost layer has strengthened the resistance that air flows through finned-tube evaporator on the other hand, reduced air mass flow.Along with thickening of frost layer, evaporating temperature decline, heating capacity decline, fan performance decay will appear, and phenomenons such as electric current increasing make the net for air-source heat pump units cisco unity malfunction.
We can say that the low temperature adaptability of air source heat pump is poor, knot, defrosting problem are the bottlenecks of its efficient operation of restriction.How to improve air source heat pump refrigerant flow at low temperatures, reduce delivery temperature; Under high humidity environment, delay the outdoor heat exchanger frosting and be to be related to air source heat pump more extensively, the key issue of more efficient operation.
Summary of the invention
The objective of the invention is to the problems referred to above, provide a kind of and have stronger temperature accommodation, can delay frosting, the wide-temperature high-efficiency air source heat pump unit and the operation method thereof with anti-frosting function of the operation of annual high efficient and reliable.
The objective of the invention is to realize like this: have compressor, indoor heat exchanger and outdoor heat exchanger, the exhaust outlet of compressor successively through first open and close valve, four-way change-over valve second valve of first valve, four-way change-over valve be communicated with indoor heat exchanger after; Indoor heat exchanger is connected with two-way reservoir through first check valve, tells two the tunnel from two-way reservoir; Road opening and closing valve through the 3rd valve of frost prevention coil pipe, the 3rd choke valve, outdoor heat exchanger, four-way change-over valve, the 4th valve of four-way change-over valve, two-way reservoir, second successively and be connected wherein with the air entry of compressor; Another road wherein opens and closes valve through magnetic valve, second choke valve, second successively and is connected with the air entry of compressor; First check valve is connected in parallel to the first throttle valve reverse with the first check valve direction; The 3rd choke valve is connected in parallel and the second reverse check valve of the 3rd choke valve direction is arranged; The exhaust outlet of compressor successively through first open and close valve, four-way change-over valve the 3rd valve communication chamber external heat exchanger of first valve, four-way change-over valve after; Outdoor heat exchanger is connected with two-way reservoir through the frost prevention coil pipe through second check valve; Then, opening and closing valve through first throttle valve, indoor heat exchanger, second valve of four-way change-over valve, the 4th valve of four-way change-over valve, two-way reservoir, second successively by two-way reservoir is connected with the air entry of compressor.
The present invention, its operation method: a, frost prevention operation method: the high pressure refrigerant vapor by compressor comes out gets into the indoor heat exchanger heat release through first valve of the first keying valve and four-way change-over valve, second valve of four-way change-over valve, to indoor heating; Get into two-way reservoir through first check valve then, the refrigerant liquid that comes out from two-way reservoir gets into the frost prevention coil pipe, improves outside air temperature; Reduce relative humidity, delay frosting, get into the 3rd choke valve then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, the inlet chamber external heat exchanger, and heat absorption vaporization back gets into the 3rd valve of four-way change-over valve; The 4th valve via four-way change-over valve gets into two-way reservoir then, and further the vaporization back opens and closes valve through second and gets into compressor compresses; Accomplish a frost prevention circulation, at this moment, closed electromagnetic valve; B, cold operation method: the high pressure refrigerant vapor by compressor comes out gets into the indoor heat exchanger heat release through first valve of the first keying valve and four-way change-over valve, second valve of four-way change-over valve, to indoor heating; Get into two-way reservoir through first check valve then, the refrigerant liquid that comes out from two-way reservoir divides two-way: road entering frost prevention coil pipe wherein gets into the 3rd choke valve then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure; The inlet chamber external heat exchanger, heat absorption vaporization back gets into the 3rd valve of four-way change-over valve, via the 4th valve of four-way change-over valve; Get into two-way reservoir then; After further back and another burst refrigerant mixed are come out from two-way reservoir in the vaporization back, open and close valve through second and get into compressor compresses, accomplish a cold operation circulation; Another road wherein gets into the second choke valve throttling through magnetic valve, and throttling becomes gas-liquid mixture, with the refrigerant mixed of coming out from two-way reservoir, opens and closes valve through second then and gets into compressor; C, Defrost operation method: the high pressure refrigerant vapor of coming out by compressor, open and close valve and first valve of four-way change-over valve, the 3rd valve inlet chamber external heat exchanger heat release of four-way change-over valve through first, outdoor heat exchanger is defrosted; Get into the frost prevention coil pipe through second check valve then, the refrigerant liquid that comes out from the frost prevention coil pipe gets into two-way reservoir and further cools off, and gets into the first throttle valve then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, gets into indoor heat exchanger, and cold-producing medium heat absorption vaporization back gets into second valve of four-way change-over valve; The 4th valve via four-way change-over valve gets into two-way reservoir then, after further come out from two-way reservoir in the vaporization back; Open and close valve through second and get into compressor compresses; Accomplish a cycle, at this moment, closed electromagnetic valve; D, refrigerating operaton method: the high pressure refrigerant vapor of coming out by compressor, open and close valve and first valve of four-way change-over valve, the 3rd valve inlet chamber external heat exchanger heat release of four-way change-over valve through first, cold-producing medium is cooled off; Get into the frost prevention coil pipe through second check valve then and carried out but coldly, it is but cold that the refrigerant liquid that comes out from the frost prevention coil pipe gets into the further mistake of two-way reservoir, gets into the first throttle valve then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, gets into indoor heat exchanger, freezes to indoor; Cold-producing medium heat absorption vaporization back gets into second valve of four-way change-over valve, and the 4th valve via four-way change-over valve gets into two-way reservoir then; After further come out from two-way reservoir in the vaporization back, open and close valve through second and get into compressor compresses, accomplish a kind of refrigeration cycle; At this moment, closed electromagnetic valve.
1), through the liquid spraying technique the present invention has following good effect:, improve this unit refrigerant flow at low temperatures, thereby strengthen the low temperature adaptability of air source heat pump; 2), the frost prevention coil pipe is set, between outside air temperature-6～5 ℃, relative humidity starts the frost prevention circulation under the meteorological condition more than 65%, improve outside air temperature, reduces relative humidity, delays frosting; 3), adopt two-way reservoir, thereby reservoir and gas-liquid separator are united two into one, not only simplified circulatory system flow process, and can realize cold, suction superheat before the throttling with excessivelying, further improve the efficient of unit, the safe operation of assurance unit; 4), this wide-temperature high-efficiency air source heat pump unit applicability with anti-frosting function is wide, adopts the air that is available anywhere as low level heat energy, characteristics such as adapt to that China is populous, site coverage, the scale of construction are big; 5), efficiently move the whole year; Zone adaptability is strong; This wide-temperature high-efficiency air source heat pump unit with anti-frosting function can be like-15 ℃ of normal operations under low outside air temperature; And obtain the higher coefficient of performance, thus the scope of application of air source heat pump is extended on the south the Shenyang from traditional the Changjiang river, the Huanghe valley, have very strong trans-regional adaptability.
The present invention is owing to pass through the low temperature adaptability that the liquid spraying technique strengthens air source heat pump; The frost prevention coil pipe is set, delays frosting; Adopt two-way reservoir, simplify circulatory system flow process, further improve the efficient of unit, guarantee the safe operation of unit; Through these technical measures, make that the net for air-source heat pump units of invention has stronger temperature accommodation, can delay frosting, the operation of annual high-efficiency reliable; Thereby, the present invention, the advantage of have stronger temperature accommodation, can delay frosting, annual high efficient and reliable being moved.
Following embodiment accompanying drawings is further described the present invention.
Description of drawings
Fig. 1 is the structural principle sketch map of one embodiment of the present of invention.
Among the figure, 1, compressor; 21, first valve of four-way change-over valve; 22, second valve of four-way change-over valve; 23, the 3rd valve of four-way change-over valve; 24, the 4th valve of four-way change-over valve; 3, indoor heat exchanger; 4, two-way reservoir; 5, frost prevention coil pipe; 6, outdoor heat exchanger; 7, first open and close valve; 8, first check valve; 9, first throttle valve; 10, second open and close valve; 11, second choke valve; 12, magnetic valve; 13, the 3rd choke valve; 14, second check valve.
The specific embodiment
With reference to Fig. 1, present embodiment has compressor 1, indoor heat exchanger 3 and outdoor heat exchanger 6, the exhaust outlet of compressor 1 successively through first open and close valve 7, four-way change-over valve second valve 22 of first valve 21, four-way change-over valve be communicated with indoor heat exchangers 3 after; Indoor heat exchanger is connected with two-way reservoir 4 through first check valve 8, tells two the tunnel from two-way reservoir; Wherein a road the 4th valve 24, the two-way reservoir, second of the 3rd valve 23 through frost prevention coil pipe 5, the 3rd choke valve 13, outdoor heat exchanger 6, four-way change-over valve, four-way change-over valve open and close valve 10 and are connected with the air entry of compressor 1 successively; Another road wherein opens and closes valve 10 and is connected with the air entry of compressor 1 through magnetic valve 12, second choke valve 11, second successively; First check valve 8 is connected in parallel to the first throttle valve 9 reverse with the first check valve direction; The 3rd choke valve 13 is connected in parallel and the second reverse check valve 14 of the 3rd choke valve direction is arranged; The exhaust outlet of compressor 1 successively through first open and close valve 7, four-way change-over valve the 3rd valve 23 communication chamber external heat exchangers 6 of first valve 21, four-way change-over valve after; Outdoor heat exchanger is connected with two-way reservoir 4 through frost prevention coil pipe 5 through second check valve 14; Then, the 4th valve 24, the two-way reservoir, second of second valve 22 through first throttle valve 9, indoor heat exchanger 3, four-way change-over valve, four-way change-over valve open and close valve 10 and are connected with the air entry of compressor 1 successively by two-way reservoir.
Operation method with wide-temperature high-efficiency air source heat pump unit of anti-frosting function: a, frost prevention operational mode: between outside air temperature-6～5 ℃, relative humidity starts the frost prevention circulation under the meteorological condition more than 65%; The high pressure refrigerant vapor that come out by compressor 1 this moment, through first open and close first valve 21 of valve 7 and four-way change-over valve, second valve 22 of four-way change-over valve gets into indoor heat exchangers 3 heat releases, to indoor heating; Get into two-way reservoir 4 through first check valve 8 then, the refrigerant liquid that comes out from two-way reservoir gets into frost prevention coil pipe 5, improves outside air temperature; Reduce relative humidity, delay frosting, get into the 3rd choke valve 13 then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, inlet chamber external heat exchanger 6, and heat absorption vaporization back gets into the 3rd valve 23 of four-way change-over valve; The 4th valve 24 via four-way change-over valve; Get into two-way reservoir then, further the vaporization back opens and closes valve 10 through second and gets into compressor compresses, accomplishes a frost prevention circulation; At this moment, magnetic valve 12 cuts out; B, cold operation pattern: when outside air temperature is low, start the low temperature circulation, the high pressure refrigerant vapor that come out by compressor 1 this moment; Through first open and close first valve 21 of valve 7 and four-way change-over valve, second valve 22 of four-way change-over valve gets into indoor heat exchangers 3 heat releases, to indoor heating, gets into two-way reservoir 4 through first check valve 8 then; The refrigerant liquid that comes out from two-way reservoir divides two-way: road entering frost prevention coil pipe 5 wherein; Get into the 3rd choke valve 13 then, throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, inlet chamber external heat exchanger 6; Heat absorption vaporization back gets into the 3rd valve 23 of four-way change-over valve; The 4th valve 24 via four-way change-over valve gets into two-way reservoir then, after further back and another burst refrigerant mixed are come out from two-way reservoir in the vaporization back; Open and close valve 10 through second and get into compressor 1 compression, accomplish a cold operation circulation; Another road wherein gets into 11 throttlings of second choke valve through magnetic valve 12; Throttling becomes gas-liquid mixture, with the refrigerant mixed of coming out from two-way reservoir 4, opens and closes valve 10 through second then and gets into compressor; Improve the refrigerant flow of low temperature lower compression machine, thereby reduce delivery temperature; C, Defrost operation pattern: when frosting appears in system's operation, start cycle, the high pressure refrigerant vapor that come out by compressor 1 this moment; Open and close first valve 21 of valve 7 and four-way change-over valve, the 3rd valve 23 inlet chamber external heat exchangers 6 heat releases of four-way change-over valve through first, outdoor heat exchanger 6 is defrosted, get into frost prevention coil pipes 5 through second check valve 14 then; The refrigerant liquid that comes out from the frost prevention coil pipe gets into two-way reservoir 4 and further cools off, and gets into first throttle valve 9 then, and throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure; Get into indoor heat exchanger 3, simultaneously for fear of the indoor cold wind that send, can close indoor blower this moment; Cold-producing medium heat absorption vaporization back gets into second valve 22 of four-way change-over valve, and the 4th valve 24 via four-way change-over valve gets into two-way reservoir then; After further come out from two-way reservoir in the vaporization back, open and close valve 10 through second and get into compressor compresses, accomplish a cycle; At this moment, magnetic valve 12 cuts out; D, refrigerating operaton pattern: when summer, outside air temperature was higher, at this moment the indoor refrigeration that needs started kind of refrigeration cycle; The high pressure refrigerant vapor of being come out by compressor 1 opens and closes first valve 21 of valve 7 and four-way change-over valve, the 3rd valve 23 inlet chamber external heat exchangers 6 heat releases of four-way change-over valve through first, and cold-producing medium is cooled off; Get into frost prevention coil pipes 5 through second check valve 14 then and carried out but coldly, it is but cold that the refrigerant liquid that comes out from the frost prevention coil pipe gets into two-way reservoir 4 further mistakes, and then improve the refrigerating efficiency of system; Get into first throttle valve 9 then, throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, gets into indoor heat exchanger 3; Freeze to indoor, cold-producing medium heat absorption vaporization back gets into second valve 22 of four-way change-over valve, via the 4th valve 24 of four-way change-over valve; Get into two-way reservoir then, after further come out from two-way reservoir in the vaporization back, open and close valve 10 through second and get into compressor compresses; Accomplish a kind of refrigeration cycle, at this moment, magnetic valve 12 cuts out.
Claims (1)
1. the operation method with wide-temperature high-efficiency air source heat pump unit of anti-frosting function has compressor (1), indoor heat exchanger (3) and outdoor heat exchanger (6), it is characterized in that:
The exhaust outlet of said compressor (1) successively through first open and close valve (7), four-way change-over valve second valve (22) of first valve (21), four-way change-over valve be communicated with indoor heat exchanger (3) after; Indoor heat exchanger is connected with two-way reservoir (4) through first check valve (8), tells two the tunnel from two-way reservoir; Road opening and closing valve (10) through the 3rd valve (23) of frost prevention coil pipe (5), the 3rd choke valve (13), outdoor heat exchanger (6), four-way change-over valve, the 4th valve (24) of four-way change-over valve, two-way reservoir, second successively and be connected wherein with the air entry of compressor (1); Another road wherein opens and closes valve (10) through magnetic valve (12), second choke valve (11), second successively and is connected with the air entry of compressor (1);
Said first check valve (8) is connected in parallel to the first throttle valve (9) reverse with the first check valve direction; Said the 3rd choke valve (13) is connected in parallel and reverse second check valve (14) of the 3rd choke valve direction is arranged; The exhaust outlet of said compressor (1) successively through first open and close valve (7), four-way change-over valve the 3rd valve (23) the communication chamber external heat exchanger (6) of first valve (21), four-way change-over valve after; Outdoor heat exchanger is connected with two-way reservoir (4) through frost prevention coil pipe (5) through second check valve (14); Then, opening and closing valve (10) through first throttle valve (9), indoor heat exchanger (3), second valve (22) of four-way change-over valve, the 4th valve (24) of four-way change-over valve, two-way reservoir, second successively by two-way reservoir is connected with the air entry of compressor (1);
A, frost prevention operation method: the high pressure refrigerant vapor by compressor (1) comes out gets into indoor heat exchanger (3) heat release through first valve (21) of the first keying valve (7) and four-way change-over valve, second valve (22) of four-way change-over valve, to indoor heating; Get into two-way reservoir (4) through first check valve (8) then, the refrigerant liquid that comes out from two-way reservoir gets into frost prevention coil pipe (5), improves outside air temperature; Reduce relative humidity, delay frosting, get into the 3rd choke valve (13) then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, inlet chamber external heat exchanger (6), and heat absorption vaporization back gets into the 3rd valve (23) of four-way change-over valve; The 4th valve (24) via four-way change-over valve; Get into two-way reservoir then, further the vaporization back opens and closes valve (10) through second and gets into compressor compresses, accomplishes a frost prevention circulation; At this moment, magnetic valve (12) cuts out;
B, cold operation method: the high pressure refrigerant vapor of coming out by compressor (1); Get into indoor heat exchanger (3) heat release through first valve (21) of the first keying valve (7) and four-way change-over valve, second valve (22) of four-way change-over valve,, get into two-way reservoir (4) through first check valve (8) then to indoor heating; The refrigerant liquid that comes out from two-way reservoir divides two-way: road entering frost prevention coil pipe (5) wherein; Get into the 3rd choke valve (13) then, throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, inlet chamber external heat exchanger (6); Heat absorption vaporization back gets into the 3rd valve (23) of four-way change-over valve; The 4th valve (24) via four-way change-over valve gets into two-way reservoir then, after further back and another burst refrigerant mixed are come out from two-way reservoir in the vaporization back; Open and close valve (10) through second and get into compressor compresses, accomplish a cold operation circulation; Another road wherein gets into second choke valve (11) throttling through magnetic valve (12), and throttling becomes gas-liquid mixture, with the refrigerant mixed of coming out from two-way reservoir, opens and closes valve (10) through second then and gets into compressor;
C, Defrost operation method: the high pressure refrigerant vapor of coming out by compressor (1), open and close valve (7) and first valve (21) of four-way change-over valve, the 3rd valve (23) inlet chamber external heat exchanger (6) heat release of four-way change-over valve through first, outdoor heat exchanger is defrosted; Get into frost prevention coil pipe (5) through second check valve (14) then, the refrigerant liquid that comes out from the frost prevention coil pipe gets into further cooling of two-way reservoir (4), gets into first throttle valve (9) then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure; Get into indoor heat exchanger (3), cold-producing medium heat absorption vaporization back gets into second valve (22) of four-way change-over valve, via the 4th valve (24) of four-way change-over valve; Get into two-way reservoir then; After further come out from two-way reservoir in the vaporization back, open and close valve (10) through second and get into compressor compresses, accomplish a cycle; At this moment, magnetic valve (12) cuts out;
D, refrigerating operaton method: the high pressure refrigerant vapor of coming out by compressor (1), open and close valve (7) and first valve (21) of four-way change-over valve, the 3rd valve (23) inlet chamber external heat exchanger (6) heat release of four-way change-over valve through first, cold-producing medium is cooled off; Get into frost prevention coil pipe (5) through second check valve (14) then and carried out but coldly, it is but cold that the refrigerant liquid that comes out from frost prevention coil pipe (5) gets into the further mistake of two-way reservoir (4), gets into first throttle valve (9) then; Throttling becomes the refrigerant air-liquid mixture of low-temp low-pressure, gets into indoor heat exchanger (3), freezes to indoor; Cold-producing medium heat absorption vaporization back gets into second valve (22) of four-way change-over valve; The 4th valve (24) via four-way change-over valve gets into two-way reservoir then, after further come out from two-way reservoir in the vaporization back; Open and close valve (10) through second and get into compressor compresses; Accomplish a kind of refrigeration cycle, at this moment, magnetic valve (12) cuts out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101501536A CN101806519B (en) | 2010-04-19 | 2010-04-19 | Wide-temperature high-efficiency air source heat pump unit with anti-frosting function and operating method thereof |
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| CN2010101501536A CN101806519B (en) | 2010-04-19 | 2010-04-19 | Wide-temperature high-efficiency air source heat pump unit with anti-frosting function and operating method thereof |
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| CN101806519B true CN101806519B (en) | 2012-07-11 |
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| CN103423919B (en) * | 2012-05-23 | 2016-06-29 | 约克广州空调冷冻设备有限公司 | Air source heat pump system and the defrost fluid-discharge method for this air source heat pump system |
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| CN109990501A (en) * | 2019-04-15 | 2019-07-09 | 特灵空调系统(中国)有限公司 | Heat-exchange system |
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