CN1232787C - Low temperature air heat source heat pump system - Google Patents
Low temperature air heat source heat pump system Download PDFInfo
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- CN1232787C CN1232787C CN 03136725 CN03136725A CN1232787C CN 1232787 C CN1232787 C CN 1232787C CN 03136725 CN03136725 CN 03136725 CN 03136725 A CN03136725 A CN 03136725A CN 1232787 C CN1232787 C CN 1232787C
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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
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient temperatures
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Abstract
The present invention discloses a low temperature air heat source and heat pump system which comprises a compressor (1), a four-way reversing valve (8), an indoor heat exchanger (2), an outdoor heat exchanger (4), a first expansion valve (3), a second expansion valve (9) and a gas-liquid separator (5). The present invention is characterized in that the four-way reversing valve (8) of the exhaust pipeline of the compressor (1) is connected with the outdoor heat exchanger (4) through a dividing valve (6), so that the heat-pump system is divided into a main circulation loop and a flow dividing circulation loop. When environment temperature is low, refrigeration agents in the flow dividing circulation loop can regulate the state of the refrigeration agents absorbed by the compressor, so that the compressor can absorb gaseous refrigeration agents with large density. Under the condition of low temperature environment, the low temperature air heat source and heat pump system can provide sufficient heat energy for indoor space.
Description
Technical field
The present invention relates to a kind of Cryogenic air heat source heat pump system.Relate in particular to a kind of can even running under cold environmental conditions and keep the refrigerant flow of comparison abundance, to the indoor Cryogenic air heat source heat pump system that sufficient amount of heat is provided.
Background technology
Heat pump be a kind of with the condenser liberated heat to a kind of refrigeration system that is conditioned the environment heat supply.With regard to the thermal physical process of heat pump, it is a kind of special use pattern of refrigeration machine, it be conceived to cold-producing medium in the system high pressure side by the exchange heat between the condenser and the external world.Heat pump to characteristics such as environment friendliness and energy savings, has obtained using widely with it as one of apparatus-form of heat is provided in a lot of fields.
The air heat source and thermal pump system as low-temperature heat source, provides heat (hereinafter to be referred as heating capacity) to being conditioned object with environment temperature.The air heat source and thermal pump system changes to being conditioned the change with the outdoor air ambient parameter of heat that object provides.Owing to operation, manage and keep in repair more convenient, have the dual-use function of cooling and warming, the heat radiation of system does not need cooling tower again, and the air heat source and thermal pump system has obtained application more and more widely.But, the air heat source and thermal pump system in actual applications, to run into the problem of two aspects inevitably: the one, reduce along with the reduction of outside air temperature, compressor suction and discharge pressure reduction increases, the density of the cold-producing medium that compressor sucks reduces, the circular flow of heat pump internal refrigeration storage agent reduces, the problem that causes heat pump to reduce to the indoor heat that provides; The 2nd, when outside air temperature was low, the outdoor heat exchanger fin surface of air heat source and thermal pump system was understood frosting, need take the problem of the measure of defrosting.
Recycled back is a Defrost method commonly used at present.Adopt this method, the defrosting loss accounts for 10.2% of heat pump total energy consumption loss.Wherein, because about 27% defrosting action is not have seriously to enter defrost cycle under the situation that needs defrosting in the fin surface frosting, causes unnecessary energy waste thus, has increased user's energy resource consumption expense and equipment maintenance cost.Adopt the mode of hot-gas bypass, the cold-producing medium that compressor is discharged or the part shunting of the cold-producing medium from indoor heat exchanger, and this part cold-producing medium that will be shunted is incorporated into outdoor heat exchanger and defrosts.Can not be when this Defrost mode has been avoided defrosting that the recycled back Defrost mode causes to the indoor heating problem.For example CN2506941Y, CN87202133, U.S. Pat 5275008 and the flat 9-170837 of Japan Patent TOHKEMY disclose this Defrost method.The deficiency of air heat source and thermal pump system heating capacity when moving under cold environmental conditions for remedying, the normal way of setting up auxiliary heater that adopts is promptly established heater at indoor heat exchanger air outlet place.This method not only thermal efficiency is low, and poor safety performance.
Also disclose a kind of system that adopts the cold-producing medium split-flow heater in the prior art, indoor temperature descends than big this problem in the air heat source and thermal pump system defrost process with solving.Referring to U.S. Pat 5275008 and the flat 9-170837 of Japan Patent TOHKEMY.This method is that indoor heat exchanger is divided in two parts, and increases a cold-producing medium shunting auxiliary heater in the centre, and during Defrost operation, existing portion gas was condensed into liquid when the high temperature refrigerant gas that compressor is discharged entered the indoor heat exchanger forward part.Make this partially liq once more flash to gas, and then enter the latter half of indoor heat exchanger through the heating of cold-producing medium split-flow heater this moment.Like this, rely on whole indoor heat exchanger, the heat that outdoor heat exchanger is absorbed, the heat that is produced together with the cold-producing medium split-flow heater is passed to indoor in the lump, to supply the deficiency of air heat source and thermal pump system heating load.But this method can not be regulated the pressure of the cold-producing medium that compressor sucks, thereby, adopt this method after, when environment temperature further reduced, the air heat source and thermal pump system is effectively heat supply still.
When the air heat source and thermal pump system is moved under the lower situation of outdoor environment temperature, can be to the indoor comparison sufficient amount of heat that provides, the invention provides a kind of air heat source and thermal pump system, this Cryogenic air heat source heat pump system can even running and keeps the refrigerant flow of comparison abundance under cold environmental conditions, can be to the indoor sufficient amount of heat that provides.And avoid compressor suction and compression to be embedded the generation of liquid refrigerant phenomenon.
Summary of the invention
One object of the present invention, characteristics and advantage are when solving existing air heat source and thermal pump system and moving under the lower condition of outdoor environment temperature, the problem of heating capacity deficiency.
One object of the present invention, characteristics and advantage are to solve existing air heat source and thermal pump system under the lower situation of outdoor environment temperature, because system can not be to the indoor sufficient amount of heat that provides, and use auxiliary electrical to heat, promptly on indoor heat exchanger or outdoor heat exchanger, arrange electric heater unit, the good problem of bringing thus of security portion.
Characteristics of the present invention and advantage are that the existing air heat source and thermal pump system of solution can not be to the indoor problem that heat is provided under the situation that outdoor heat exchanger need defrost.
Characteristics of the present invention and advantage are that the existing air heat source and thermal pump system of solution can not be to the indoor problem that sufficient amount of heat is provided under the situation that outdoor heat exchanger need defrost.
The invention provides a kind of Cryogenic air heat source heat pump system, this system is formed by connecting in turn by compressor, four-way change-over valve, indoor heat exchanger, first expansion valve, outdoor heat exchanger, is connected with gas-liquid separator at cross valve to the air-breathing loop of compressor; Between four-way change-over valve and indoor heat exchanger, connect a flow divider, this flow divider is connected with outdoor heat exchanger, high-temperature high-pressure refrigerant from four-way change-over valve can be divided into two stocks and not enter indoor heat exchanger and outdoor heat exchanger, outdoor heat exchanger is connected to gas-liquid separator by second expansion valve; Be connected in series with one first three-way diverter valve and one second three-way diverter valve between the indoor heat exchanger and first expansion valve, first three-way diverter valve and second three-way diverter valve are connected respectively to gas-liquid separator; Connect a check valve between four-way change-over valve and the gas-liquid separator, only allow cold-producing medium from heat exchanger to the gas-liquid separator one-way flow.
Wherein when to indoor when cold is provided, the control flow divider, make the cold-producing medium flow dividing circulation loop not work, the work of cold-producing medium main circulation loop, this cold-producing medium main circulation loop is connected in sequence following parts by pipeline: compressor, four-way change-over valve, outdoor heat exchanger, first expansion valve, second three-way diverter valve and first three-way diverter valve, indoor heat exchanger, flow divider, four-way change-over valve, check valve, gas-liquid separator, compressor.
Wherein under being not less than-5 ℃ condition, the outdoor air environment temperature makes heating operation, and the outdoor heat exchanger of air heat source and thermal pump system does not need to defrost when moving, the control flow divider, the cold-producing medium flow dividing circulation loop is not worked, the work of cold-producing medium main circulation loop, this main circulation loop is connected in sequence following parts by pipeline: compressor, four-way change-over valve, flow divider, indoor heat exchanger, first three-way diverter valve, second three-way diverter valve, first expansion valve, outdoor heat exchanger, four-way change-over valve, check valve, gas-liquid separator, compressor.
Wherein, when making heating operation under the outdoor air environment temperature is lower than-5 ℃ condition, the control flow divider makes cold-producing medium flow dividing circulation loop and cold-producing medium main circulation loop work simultaneously; Wherein main circulation loop is connected in sequence following parts by pipeline: compressor, four-way change-over valve, flow divider, indoor heat exchanger, first three-way diverter valve, gas-liquid separator, second three-way diverter valve, first expansion valve, outdoor heat exchanger, four-way change-over valve, check valve, gas-liquid separator, compressor; The cold-producing medium flow dividing circulation loop is connected in sequence following parts by pipeline: compressor, four-way change-over valve, flow divider, outdoor heat exchanger, second expansion valve, gas-liquid separator, compressor.
Wherein, be not less than in the outdoor air environment temperature under-5 ℃ the condition and make heating operation, and the outdoor heat exchanger of air heat source and thermal pump system need defrost when moving, the control flow divider, cold-producing medium flow dividing circulation loop and cold-producing medium main circulation loop are worked simultaneously, and wherein main circulation loop is connected in sequence following parts by pipeline: compressor, four-way change-over valve, flow divider, indoor heat exchanger, first three-way diverter valve, second three-way diverter valve, first expansion valve, outdoor heat exchanger, four-way change-over valve, check valve, gas-liquid separator, compressor; The cold-producing medium flow dividing circulation loop is connected in sequence following parts by pipeline: compressor, four-way change-over valve, flow divider, outdoor heat exchanger, second expansion valve, gas-liquid separator, compressor.
When making heating operation under the outdoor air environment temperature is lower than-5 ℃ condition, the ratio of the flow of the flow of cold-producing medium flow dividing circulation loop inner refrigerant and cold-producing medium main circulation loop inner refrigerant is between 0.02～0.20.Flow ratio with the time external environment condition, cold-producing medium character and heat pump outdoor heat exchanger relevant with the matching relationship between the indoor heat exchanger.Optimum flow ratio generally is about 0.13.
Be not less than in the outdoor air environment temperature under-5 ℃ the condition and make heating operation, and the outdoor heat exchanger of air heat source and thermal pump system need defrost when action, and the ratio of the flow of the flow of cold-producing medium flow dividing circulation loop inner refrigerant and cold-producing medium main circulation loop inner refrigerant is between 0.02～0.20.Optimum flow ratio generally is about 0.11.
Description of drawings
Fig. 1 is a Cryogenic air heat source heat pump system schematic of the present invention.
Fig. 2 is the schematic flow sheet of Cryogenic air heat source heat pump system of the present invention when refrigerating operaton.
To be Cryogenic air heat source heat pump of the present invention system be not less than-5 ℃ in the outdoor air environment temperature to Fig. 3 heats the circulation process schematic diagram when not having the defrosting action down.
To be Cryogenic air heat source heat pump of the present invention system in the outdoor air environment temperature be not less than Fig. 4 heats the circulation process schematic diagram when defrosting under-5 ℃.
To be Cryogenic air heat source heat pump of the present invention system in the outdoor air environment temperature be lower than Fig. 5 heats the circulation process schematic diagram under-5 ℃.
The specific embodiment
Fig. 1 is a Cryogenic air heat source heat pump system schematic of the present invention.As shown in Figure 1, this system comprises compressor 1, four-way change-over valve 8, flow divider 6, indoor heat exchanger 2, first three-way diverter valve 11, second three-way diverter valve 10, first expansion valve 3, outdoor heat exchanger 4, gas-liquid separator 5, check valve 7 and second expansion valve 9.On the gas exhaust piping of compressor 1, set up flow divider 6, cold-producing medium has been divided into two, linked to each other with indoor heat exchanger 2 with outdoor heat exchanger 4 respectively.By flow divider 6, the high-temperature high-pressure refrigerant gas that compressor is discharged can be shunted.This part high-temperature high-pressure refrigerant gas of shunting at first passes through outdoor heat exchanger 4, is undertaken entering gas-liquid separator 5 after the appropriateness expansion decompression by second expansion valve 9 then, with the main flow refrigerant mixed pressure regulation from outdoor heat exchanger 4.Cold-producing medium behind the combined voltage regulation, is sucked by compressor 1 in gas-liquid separator 5.After the tapped refrigerant pressure regulation, the refrigerant gas pressure that compressor 1 sucks improves, density increases, make air heat source and thermal pump system machine set system, even under lower environment temperature, move, also can guarantee the mass flow of the cold-producing medium of air heat source and thermal pump internal system, thereby make that the air heat source and thermal pump system can be to the indoor sufficient amount of heat that provides.
Cold-producing medium in the gas-liquid separator 5 by main circulation loop return passage external heat exchanger 4, is set up check valve 7 on the main circulation loop between outdoor heat exchanger 4 and the gas-liquid separator 5.The effect of check valve 7 is to allow the interior cold-producing medium of main circulation loop from the one-way flow of outdoor heat exchanger 4 between gas-liquid separator.
Arrive to a certain degree when environment temperature is low, flow divider 6 actions in the air heat source and thermal pump system, the part shunting of intrasystem cold-producing medium, second three-way diverter valve of setting up on the connecting line between the indoor heat exchanger 2 and first expansion valve 3 10 switches the glide path of the cold-producing medium in the main circulation loop, after making it to leave indoor heat exchanger 2, at first with gas-liquid separator 5 in cold-producing medium carry out exchange heat, and then through behind first expansion valve, 3 puffings, inlet chamber external heat exchanger 4.
Cold-producing medium in the main circulation loop and the cold-producing medium in the flow dividing circulation loop only carry out exchange heat in outdoor heat exchanger 4, do not mix.Cold-producing medium in the main circulation loop through first three-way diverter valve 11 through the cold-producing medium in 10 sections of gas-liquid separators 5 to second three-way diverter valves and the flow dividing circulation loop in gas-liquid separator 5, only carry out exchange heat, do not mix.
Being used for cold-producing medium flow processs in the outdoor heat exchanger 4 of Cryogenic air heat source heat pump of the present invention system requires to carry out again structural manufacturing process and arranges.Simultaneously, contain liquid in order effectively to prevent the cold-producing medium that compressor sucks, the cold-producing medium requirements of process in the gas-liquid separator 5 in the new type low temperature air heat source and thermal pump system flow provided by the invention is carried out structural manufacturing process again and is arranged.
Fig. 2 is a Cryogenic air heat source heat pump of the present invention system, the schematic flow sheet when refrigerating operaton.At this moment, the cold-producing medium flow dividing circulation loop is not worked, the work of cold-producing medium main circulation loop.Wherein, the flow process of cold-producing medium main circulation loop is: the high-temperature high-pressure refrigerant gas that compressor 1 is discharged at first passes through four-way change-over valve 8 inlet chamber external heat exchanger 4 then, in outdoor heat exchanger 4, cold-producing medium passes through outdoor heat exchanger 4 to the outdoor environment release heat, after condensing into highly pressurised liquid, leave outdoor heat exchanger 4, entering first expansion valve 3 then expands, enter indoor heat exchanger 2 by second three-way diverter valve 10 and first three-way diverter valve of opening 11 successively then, in indoor heat exchanger 2, cold-producing medium by indoor heat exchanger 2 to the indoor cold that provides, flash to the flow divider 6 of flowing through successively again behind the gas, four-way change-over valve 8, check valve 7 enters gas-liquid separator 5, is sucked by compressor 1 at last.
To be Cryogenic air heat source heat pump of the present invention system be not less than-5 ℃ in the outdoor air environment temperature to Fig. 3 heats the circulation process schematic diagram when not having the defrosting action down.At this moment, the cold-producing medium flow dividing circulation loop is not worked, the work of cold-producing medium main circulation loop.Wherein, the flow process of cold-producing medium main circulation loop is: the high-temperature high-pressure refrigerant gas that compressor 1 is discharged at first by four-way change-over valve 8 then, the flow divider 6 of flowing through enters indoor heat exchanger 2, in indoor heat exchanger 2, cold-producing medium by indoor heat exchanger 2 to indoor heat is provided after, after condensing into highly pressurised liquid, leave indoor heat exchanger 2, flow through successively then first three-way diverter valve 11 and second three-way diverter valve 10, entering first expansion valve 3 expands, the inlet chamber external heat exchanger 4 then, in outdoor heat exchanger 4, cold-producing medium absorbs heat by outdoor heat exchanger 4 from outdoor environment, flash to the four-way change-over valve 8 of flowing through successively again behind the gas, check valve 7 enters gas-liquid separator 5, is sucked by compressor 1 at last.
To be Cryogenic air heat source heat pump of the present invention system in the outdoor air environment temperature be not less than Fig. 4 heats the circulation process schematic diagram when defrosting under-5 ℃.At this moment, cold-producing medium main circulation loop and cold-producing medium flow dividing circulation loop are worked simultaneously.The flow process of cold-producing medium main circulation loop is: the high-temperature high-pressure refrigerant gas that compressor 1 is discharged at first by four-way change-over valve 8 then, the flow divider 6 of flowing through enters indoor heat exchanger 2, in indoor heat exchanger 2, cold-producing medium by indoor heat exchanger 2 to indoor heat is provided after, after condensing into highly pressurised liquid, leave indoor heat exchanger 2, flow through successively then first three-way diverter valve 11 and second three-way diverter valve 10, entering first expansion valve 3 expands, the inlet chamber external heat exchanger 4 then, in outdoor heat exchanger 4, cold-producing medium absorbs heat by outdoor heat exchanger 4 from outdoor environment, flash to the four-way change-over valve 8 of flowing through successively again behind the gas, check valve 7 enters gas-liquid separator 5, is sucked by compressor 1 at last; The flow process of cold-producing medium flow dividing circulation loop is: the high-temperature high-pressure refrigerant gas that compressor 1 is discharged at first by four-way change-over valve 8 then, the flow divider 6 of flowing through, inlet chamber external heat exchanger 4, in outdoor heat exchanger 4, cold-producing medium in the flow dividing circulation loop defrosts to outdoor switching heat-exchanger 4 and the cold-producing medium release heat in main circulation loop, leave back outdoor heat exchanger 4 then, enter then second expansion valve 9 expand the decompression after enter gas-liquid separator 5, in gas-liquid separator 5, cold-producing medium in two closed circuits carries out combined voltage regulation, leave gas-liquid separator 5 at last, sucked by compressor.
The relative humidity of the ratio of the flow of cold-producing medium flow dividing circulation loop inner refrigerant and the optimum flow of cold-producing medium main circulation loop inner refrigerant and outdoor environment temperature, outdoor environment and the kind of the employed cold-producing medium of heat pump are relevant.
To be Cryogenic air heat source heat pump of the present invention system in the outdoor air environment temperature be lower than Fig. 5 heats the circulation process schematic diagram under-5 ℃.At this moment, cold-producing medium main circulation loop and cold-producing medium flow dividing circulation loop are worked simultaneously.The flow process of cold-producing medium main circulation loop is: the high-temperature high-pressure refrigerant gas that compressor 1 is discharged at first by four-way change-over valve 8 then, the flow divider 6 of flowing through enters indoor heat exchanger 2, in indoor heat exchanger 2, cold-producing medium by indoor heat exchanger 2 to indoor heat is provided after, after condensing into highly pressurised liquid, leave indoor heat exchanger 2, by first three-way diverter valve 11, with the cold-producing medium gas-liquid separator 5 that leads, carry out appropriate heating by the cold-producing medium in 5 pairs of gas-liquid separators 5 of gas-liquid separator, second three-way diverter valve 10 of flowing through then enters first expansion valve 3, inlet chamber external heat exchanger 4 after expanding, in outdoor heat exchanger 4, cold-producing medium absorbs heat by outdoor heat exchanger 4 from outdoor environment, flash to the four-way change-over valve 8 of flowing through successively again behind the gas, check valve 7 enters gas-liquid separator 5, is sucked by compressor 1 at last; The flow process of cold-producing medium flow dividing circulation loop is: the high-temperature high-pressure refrigerant gas that compressor 1 is discharged at first by four-way change-over valve 8 then, flow through flow divider 6, inlet chamber external heat exchanger 4, in outdoor heat exchanger 4, the cold-producing medium release heat of cold-producing medium in the flow dividing circulation loop in main circulation loop, leave back outdoor heat exchanger 4 then, enter then second expansion valve 9 expand the decompression after enter gas-liquid separator 5, in gas-liquid separator 5, cold-producing medium in two closed circuits carries out combined voltage regulation, leave gas-liquid separator 5 at last, sucked by compressor.
The flow of cold-producing medium flow dividing circulation loop inner refrigerant is 0.02 with the ratio minimum of the flow of cold-producing medium main circulation loop inner refrigerant, is 0.20 to the maximum, is preferably 0.11.The relative humidity of the ratio of the flow of cold-producing medium flow dividing circulation loop inner refrigerant and the optimum flow of cold-producing medium main circulation loop inner refrigerant and outdoor environment temperature, outdoor environment and the kind of the employed cold-producing medium of heat pump are relevant.For example, use propane to make cold-producing medium, outdoor environment temperature is-12 ℃ to-18 ℃, and relative humidity is under about 65% the condition, the flow of cold-producing medium flow dividing circulation loop inner refrigerant is 0.08 to 0.16 with the ratio of the optimum flow of cold-producing medium main circulation loop inner refrigerant, is preferably 0.12; Use R407C to make cold-producing medium, outdoor environment temperature is-10 ℃ to-15 ℃, relative humidity is under about 60% the condition, and the ratio of the flow of cold-producing medium flow dividing circulation loop inner refrigerant and the optimum flow of cold-producing medium main circulation loop inner refrigerant is 0.10 to 0.20 to be preferably 0.13; Use R410A to make cold-producing medium, outdoor environment temperature is-7 ℃ to-18 ℃, relative humidity is that the flow of cold-producing medium flow dividing circulation loop inner refrigerant is 0.07 to 0.19 with the ratio of the optimum flow of cold-producing medium main circulation loop inner refrigerant, is preferably 0.15 under about 55% the condition.
Adopt the air heat source and thermal pump system of Cryogenic air heat source heat pump of the present invention system, use propane to make cold-producing medium, selecting displacement for use is 22.6cm
3Rotor-type compressor.The condensation temperature of control air heat source and thermal pump system is at 50 ± 1.2 ℃, the relative humidity of external heat exchanger place, control room environment is that heating capacity, input power and the coefficient of performance of this device under different outdoor environment temperatures that obtains by test sees Table one under 65% the condition.
Table one
| Environment temperature ℃ | Heating capacity W | Input power W | The coefficient of performance |
| -15 | 2606 | 1042 | 2.5 |
| -12 | 2734 | 1043 | 2.62 |
| -9 | 2832 | 1045 | 2.71 |
| -6 | 2900 | 1046 | 2.77 |
| -3 | 2982 | 1050 | 2.84 |
| 0 | 3160 | 1053 | 3 |
| 3 | 3418 | 1059 | 3.14 |
| 6 | 3496 | 1087 | 3.21 |
| 7.2 | 3607 | 1100 | 3.28 |
| 9 | 3692 | 1106 | 3.34 |
Adopt the air heat source and thermal pump system of Cryogenic air heat source heat pump of the present invention system, use R410a to make cold-producing medium, selecting displacement for use is the rotor-type compressor of 22.6cm3.The condensation temperature of control air heat source and thermal pump system is at 50 ± 1.2 ℃, the relative humidity of external heat exchanger place, control room environment is that heating capacity, input power and the coefficient of performance of this device under different outdoor environment temperatures that obtains by test sees Table two under 65% the condition.
Table two
| Environment temperature ℃ | Heating capacity W | Input power W | The coefficient of performance |
| -15 | 2782 | 1164 | 2.39 |
| -12 | 2894 | 1167 | 2.48 |
| -9 | 2993 | 1169 | 2.56 |
| -6 | 3090 | 1171 | 2.64 |
| -3 | 3182 | 1174 | 2.71 |
| 0 | 3402 | 1181 | 2.88 |
| 3 | 3650 | 1201 | 3.04 |
| 6 | 3803 | 1226 | 3.1 |
| 7.2 | 3861 | 1230 | 3.14 |
| 9 | 3964 | 1238 | 3.2 |
Adopt the air heat source and thermal pump device of Cryogenic air heat source heat pump of the present invention system, use R410a to make cold-producing medium, selecting displacement for use is the scroll compressor of 64cm3.The condensation temperature of control air heat source and thermal pump device is at 50 ± 1.2 ℃, the relative humidity of external heat exchanger place, control room environment is that heating capacity, input power and the coefficient of performance of this device under different outdoor environment temperatures that obtains by test sees Table three under 65% the condition.
Table three
| Environment temperature ℃ | Heating capacity W | Input power W | The coefficient of performance |
| -15 | 7140 | 3051 | 2.34 |
| -12 | 7514 | 3053 | 2.46 |
| -9 | 7860 | 3058 | 2.57 |
| -6 | 8150 | 3063 | 2.66 |
| -3 | 8435 | 3067 | 2.75 |
| 0 | 8942 | 3072 | 2.91 |
| 3 | 9535 | 3106 | 3.01 |
| 6 | 9880 | 3157 | 3.13 |
| 7.2 | 10002 | 3165 | 3.16 |
| 9 | 10268 | 3170 | 3.24 |
Claims (8)
1, a kind of Cryogenic air heat source heat pump system, this system is formed by connecting in turn by compressor (1), four-way change-over valve (8), indoor heat exchanger (2), first expansion valve (3), outdoor heat exchanger (4), is connected with gas-liquid separator (5) at cross valve to the air-breathing loop of compressor;
It is characterized in that, between four-way change-over valve (8) and indoor heat exchanger (2), connect a flow divider (6), this flow divider (6) is connected with outdoor heat exchanger (4), high-temperature high-pressure refrigerant from four-way change-over valve can be divided into two strands, enter indoor heat exchanger (2) and outdoor heat exchanger (4) respectively, outdoor heat exchanger is connected to gas-liquid separator (5) by second expansion valve (9); Be connected in series with one first three-way diverter valve (11) and one second three-way diverter valve (10) between indoor heat exchanger (2) and first expansion valve (3), first three-way diverter valve (11) and second three-way diverter valve (10) are connected respectively to gas-liquid separator (5); Connect a check valve (7) between four-way change-over valve and the gas-liquid separator, only allow cold-producing medium from heat exchanger to the gas-liquid separator one-way flow.
2, a kind of Cryogenic air heat source heat pump as claimed in claim 1 system, wherein to indoor when cold is provided, control flow divider (6), make the cold-producing medium flow dividing circulation loop not work, the work of cold-producing medium main circulation loop, this cold-producing medium main circulation loop is connected in sequence following parts by pipeline: compressor (1), four-way change-over valve (8), outdoor heat exchanger (4), first expansion valve (3), second three-way diverter valve (10) and first three-way diverter valve (11), indoor heat exchanger (2), flow divider (6), four-way change-over valve (8), check valve (7), gas-liquid separator (5), compressor (1).
3, a kind of Cryogenic air heat source heat pump as claimed in claim 1 system, wherein, be not less than at outdoor environment temperature when making heating operation and described outdoor heat exchanger under-5 ℃ the condition and not defrosting action, control flow divider (6), the cold-producing medium flow dividing circulation loop is not worked, the work of cold-producing medium main circulation loop, this main circulation loop is connected in sequence following parts by pipeline: compressor (1), four-way change-over valve (8), flow divider (6), indoor heat exchanger (2), first three-way diverter valve (11), second three-way diverter valve (10), first expansion valve (3), outdoor heat exchanger (4), four-way change-over valve (8), check valve (7), gas-liquid separator (5), compressor (1).
4, a kind of Cryogenic air heat source heat pump as claimed in claim 1 system, when wherein under the outdoor air environment temperature is lower than-5 ℃ condition, making heating operation, control flow divider (6) makes cold-producing medium flow dividing circulation loop and cold-producing medium main circulation loop work simultaneously; Described main circulation loop is connected in sequence following parts by pipeline: compressor (1), four-way change-over valve (8), flow divider (6), indoor heat exchanger (2), first three-way diverter valve (11), gas-liquid separator (5), second three-way diverter valve (10), first expansion valve (3), outdoor heat exchanger (4), four-way change-over valve (8), check valve (7), gas-liquid separator (5), compressor (1); Described cold-producing medium flow dividing circulation loop is connected in sequence following parts by pipeline: compressor (1), four-way change-over valve (8), flow divider (6), outdoor heat exchanger (4), second expansion valve (9), gas-liquid separator (5), compressor (1).
5, a kind of Cryogenic air heat source heat pump as claimed in claim 1 system, wherein under being not less than-5 ℃ condition, the outdoor air environment temperature makes heating operation, and described outdoor heat exchanger need defrost when moving, control flow divider (6) is worked cold-producing medium flow dividing circulation loop and cold-producing medium main circulation loop simultaneously; Described main circulation loop is connected in sequence following parts by pipeline: compressor (1), four-way change-over valve (8), flow divider (6), indoor heat exchanger (2), first three-way diverter valve (11), second three-way diverter valve (10), first expansion valve (3), outdoor heat exchanger (4), four-way change-over valve (8), check valve (7), gas-liquid separator (5), compressor (1); Described cold-producing medium flow dividing circulation loop is connected in sequence following parts by pipeline: compressor (1), four-way change-over valve (8), flow divider (6), outdoor heat exchanger (4), second expansion valve (9), gas-liquid separator (5), compressor (1).
6, according to claim 4 or 5 described Cryogenic air heat source heat pump systems, wherein, the ratio of the flow of the flow of cold-producing medium flow dividing circulation loop inner refrigerant and cold-producing medium main circulation loop inner refrigerant is between 0.02～0.20.
7, Cryogenic air heat source heat pump according to claim 6 system, wherein, the flow of cold-producing medium flow dividing circulation loop inner refrigerant is 0.13 with the ratio of the flow of cold-producing medium main circulation loop inner refrigerant.
8, Cryogenic air heat source heat pump according to claim 6 system, wherein, the flow of cold-producing medium flow dividing circulation loop inner refrigerant is 0.11 with the ratio of the flow of cold-producing medium main circulation loop inner refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03136725 CN1232787C (en) | 2003-05-21 | 2003-05-21 | Low temperature air heat source heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03136725 CN1232787C (en) | 2003-05-21 | 2003-05-21 | Low temperature air heat source heat pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1474124A CN1474124A (en) | 2004-02-11 |
| CN1232787C true CN1232787C (en) | 2005-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03136725 Expired - Fee Related CN1232787C (en) | 2003-05-21 | 2003-05-21 | Low temperature air heat source heat pump system |
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| Country | Link |
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| CN (1) | CN1232787C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8037710B2 (en) * | 2005-08-22 | 2011-10-18 | Emerson Climate Technologies, Inc. | Compressor with vapor injection system |
| CN109813006B (en) * | 2019-01-15 | 2020-10-27 | 广东志高暖通设备股份有限公司 | Air conditioning system for improving refrigerating and heating capacity and control method |
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2003
- 2003-05-21 CN CN 03136725 patent/CN1232787C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1474124A (en) | 2004-02-11 |
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