CN104713265A - Air source heat pump unit - Google Patents
Air source heat pump unit Download PDFInfo
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- CN104713265A CN104713265A CN201310675423.9A CN201310675423A CN104713265A CN 104713265 A CN104713265 A CN 104713265A CN 201310675423 A CN201310675423 A CN 201310675423A CN 104713265 A CN104713265 A CN 104713265A
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- Prior art keywords
- valve
- heat exchanger
- valve port
- air
- finned heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses an air source heat pump unit. The air source heat pump unit comprises a compressor, a four-way reversing valve, a plurality of fin heat exchangers, a plurality of four-way valves, a falling film type heat exchanger, a check valve and a refrigeration throttling element. The four-way valves and the fin heat exchangers correspond in a one-to-one manner, and each four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port; each first valve port is connected with an exhaust opening, and each second valve port is connected with one end of the corresponding fin heat exchanger; each third valve port is connected with a fin heat exchanger valve port, and each fourth valve port is connected with the fin heat exchanger valve port through a first throttling element; and the other end of each fin heat exchanger is connected with a one-way valve and a heating throttling element, and an outlet of each one-way valve is connected with the corresponding heating throttling element through a public pipeline. A first pipe opening of the falling film type heat exchanger is connected with a falling film type heat exchanger valve port. According to the invention, in the defrosting process, heating operation does not break off, and use comfort of a user is ensured.
Description
Technical field
The present invention relates to refrigerating field, especially relate to a kind of net for air-source heat pump units.
Background technology
When net for air-source heat pump units in correlation technique heats, when finned heat exchanger surface temperature is lower than 0 DEG C, finned heat exchanger just can frosting, need to defrost to finned heat exchanger, cross valve need carry out commutating to transfer refrigeration mode to by defrost process, and the refrigerant changed in finned heat exchanger flows to carry out reverse cycle defrosting.Because refrigerant pressure oscillation is impacted compressor comparatively large in reverse cycle defrosting process, the service life of compressor can be shortened, simultaneously in reverse cycle defrosting process, use side heat source temperature periodically sharply decline and cause comfortableness to reduce.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, one object of the present invention is to propose a kind of net for air-source heat pump units, and this net for air-source heat pump units is in defrost process, and heating operation does not interrupt, and falling-film heat exchanger continues to provide heat to use room, ensure that the comfort of user.
According to the net for air-source heat pump units of the embodiment of the present invention, comprising: compressor, described compressor has air entry and exhaust outlet, four-way change-over valve, described four-way change-over valve has exhaust valve port, air-breathing valve port, finned heat exchanger valve port and falling-film heat exchanger valve port, and described exhaust valve port is connected with described exhaust outlet, and described air-breathing valve port is connected with described air entry, multiple finned heat exchanger and multiple cross valve, described multiple cross valve and described multiple finned heat exchanger one_to_one corresponding respectively, each described cross valve comprises first to fourth valve port, described first valve port of each described cross valve is connected with described exhaust outlet, described second valve port of each described cross valve is connected with one end of described finned heat exchanger, described 3rd valve port of each described cross valve is connected with described finned heat exchanger valve port, described 4th valve port of each described cross valve is connected with described finned heat exchanger valve port by first throttle element, the other end of each described finned heat exchanger is all connected with a check valve and heats restricting element, the outlet of each described check valve and each described in heat restricting element and be connected to each other by common line, falling-film heat exchanger, described falling-film heat exchanger has first to the 3rd mouth of pipe, and described first mouth of pipe is connected with described falling-film heat exchanger valve port, and described second mouth of pipe is communicated with described common line respectively with described 3rd mouth of pipe, check-valves, the import of described check-valves is connected with described 3rd mouth of pipe and the outlet of described check-valves is connected with described common line, refrigeration restricting element, described refrigeration restricting element is connected with described common line with described second mouth of pipe respectively.
According to the net for air-source heat pump units of the embodiment of the present invention, by being provided with multiple finned heat exchanger and multiple cross valve, in defrost process, four-way change-over valve does not commutate all the time, the heating operation of net for air-source heat pump units does not interrupt, falling-film heat exchanger continues to provide heat to use room, ensure that the comfort of user.And in defrost process, after need reaching system pressure, corresponding check valve could conducting for the pressure carried out in the finned heat exchanger that defrosts, the refrigerant carried out in the finned heat exchanger that defrosts could be discharged, thus net for air-source heat pump units heating operation during defrosting is continual and steady, system pressure is not caused to change, therefore do not impact compressor, extend the service life of compressor, the temperature of the delivery port of falling-film heat exchanger also there will not be periodic decline simultaneously.
In addition, according to net for air-source heat pump units of the present invention, also there is following additional technical feature:
According to a particular embodiment of the invention, described 3rd valve port of described multiple cross valve is by the first pipeline communication, and described finned heat exchanger valve port is connected with described first pipeline.
Further, described 4th valve port of each described cross valve is connected to described first pipeline by described first throttle element.
In a particular embodiment of the present invention, described first valve port of described multiple cross valve is communicated with by second pipe, and described second pipe is connected to described exhaust outlet.
Particularly, described compressor is closed or semi-hermetic refrigerating compressor unit.
Alternatively, described compressor is helical-lobe compressor.
Alternatively, described refrigeration restricting element is electric expansion valve.
Alternatively, heating restricting element described in each is electric expansion valve or heating power expansion valve.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is schematic diagram when being in refrigerating operaton according to the net for air-source heat pump units of the embodiment of the present invention;
Fig. 2 is schematic diagram when being in heating operation according to the net for air-source heat pump units of the embodiment of the present invention;
Fig. 3 is in heating operation according to the net for air-source heat pump units of the embodiment of the present invention and the 4th finned heat exchanger is in the schematic diagram of defrost state;
Fig. 4 is in heating operation according to the net for air-source heat pump units of the embodiment of the present invention and the 3rd finned heat exchanger is in the schematic diagram of defrost state;
Fig. 5 is in heating operation according to the net for air-source heat pump units of the embodiment of the present invention and the second finned heat exchanger is in the schematic diagram of defrost state;
Fig. 6 is in heating operation according to the net for air-source heat pump units of the embodiment of the present invention and the first finned heat exchanger is in the schematic diagram of defrost state.
Reference numeral:
Net for air-source heat pump units 1000, compressor 10, air entry a, exhaust outlet b, four-way change-over valve 20, exhaust valve port c, air-breathing valve port d, finned heat exchanger valve port e, falling-film heat exchanger valve port f, first finned heat exchanger 30a, second finned heat exchanger 30b, 3rd finned heat exchanger 30c, 4th finned heat exchanger 30d, first cross valve 40a, second cross valve 40b, 3rd cross valve 40c, 4th cross valve 40d, first valve port g, second valve port h, 3rd valve port i, 4th valve port j, first check valve 50a, second check valve 50b, 3rd check valve 50c, 4th check valve 50d, first heats restricting element 60a, second heats restricting element 60b, 3rd heats restricting element 60c, 4th heats restricting element 60d, common line 70, falling-film heat exchanger 80, first mouth of pipe k, second mouth of pipe l, 3rd mouth of pipe m, delivery port n, check-valves 90, refrigeration restricting element 100, first pipeline 110, first throttle element 120, second pipe 130
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Describe the net for air-source heat pump units 1000 according to the embodiment of the present invention below with reference to Fig. 1-Fig. 6, this net for air-source heat pump units 1000 can carry out heating operation can carry out refrigerating operaton again.It should be noted that, in following net for air-source heat pump units 1000, only describe the situation that this net for air-source heat pump units 1000 comprises four finned heat exchangers and four cross valves, but it should be noted that, the present invention is not limited thereto, what the technical staff of common art obviously knew is, reading the present invention's instruction disclosed herein, this embodiment can be applied to net for air-source heat pump units 1000 and comprise two, the finned heat exchanger of more than three and four and two, the situation of the cross valve of more than three and four, wherein, the quantity of finned heat exchanger and respectively one_to_one corresponding equal with the quantity of multiple cross valve, this also drops within protection scope of the present invention, below net for air-source heat pump units 1000 is described in detail.
As shown in figs 1 to 6, according to the net for air-source heat pump units 1000 of the embodiment of the present invention, comprise: compressor 10, four-way change-over valve 20, four finned heat exchangers (30a, 30b, 30c, 30d), four cross valves (40a, 40b, 40c, 40d), falling-film heat exchanger 80, check-valves 90, refrigeration restricting element 100, wherein, compressor 10 has air entry a and exhaust outlet b, particularly, compressor 10 is closed or semi-hermetic refrigerating compressor unit.Alternatively, compressor 10 is screw compressor, it should be noted that, the structure and working principle etc. of compressor 10 is prior art, is just not described in detail here.
Four-way change-over valve 20 has exhaust valve port c, air-breathing valve port d, finned heat exchanger valve port e and falling-film heat exchanger valve port f, exhaust valve port c is connected with exhaust outlet b, air-breathing valve port d is connected with air entry a, wherein, when net for air-source heat pump units 1000 is in refrigerating operaton, exhaust valve port c and the e conducting of finned heat exchanger valve port and air-breathing valve port d and falling-film heat exchanger valve port f conducting, when net for air-source heat pump units 1000 is in heating operation, exhaust valve port c and the f conducting of falling-film heat exchanger valve port and air-breathing valve port d and finned heat exchanger valve port e conducting.
Four cross valves and four finned heat exchangers one_to_one corresponding respectively, each cross valve comprises the first valve port g, second valve port h, 3rd valve port i and the 4th valve port j, first valve port g of each cross valve is connected with exhaust outlet b, second valve port h of each cross valve is connected with one end of finned heat exchanger, 3rd valve port i of each cross valve is connected with finned heat exchanger valve port e, 4th valve port j of each cross valve is connected with finned heat exchanger valve port e by first throttle element 120, the other end of each finned heat exchanger is all connected with a check valve and heats restricting element, outlet and each restricting element that heats of each check valve are connected to each other by common line 70.Alternatively, each restricting element that heats is electric expansion valve or heating power expansion valve, and first throttle element 120 is capillary.
Particularly, four cross valves are respectively the first cross valve 40a, second cross valve 40b, 3rd cross valve 40c and the 4th cross valve 40d, four finned heat exchangers are respectively the first finned heat exchanger 30a, second finned heat exchanger 30b, 3rd finned heat exchanger 30c and the 4th finned heat exchanger 30d, wherein, the first valve port g of the first cross valve 40a is connected with exhaust outlet b, the second valve port h of the first cross valve 40a is connected with one end of the first finned heat exchanger 30a, the 3rd valve port i of the first cross valve 40a is connected with finned heat exchanger valve port e, the 4th valve port j of the first cross valve 40a is connected with finned heat exchanger valve port e by first throttle element 120.
The first valve port g of the second cross valve 40b is connected with exhaust outlet b, the second valve port h of the second cross valve 40b is connected with one end of the second finned heat exchanger 30b, the 3rd valve port i of the second cross valve 40b is connected with finned heat exchanger valve port e, and the 4th valve port j of the second cross valve 40b is connected with finned heat exchanger valve port e by first throttle element 120.
The first valve port g of the 3rd cross valve 40c is connected with exhaust outlet b, the second valve port h of the 3rd cross valve 40c is connected with one end of the 3rd finned heat exchanger 30c, the 3rd valve port i of the 3rd cross valve 40c is connected with finned heat exchanger valve port e, and the 4th valve port j of the 3rd cross valve 40c is connected with finned heat exchanger valve port e by first throttle element 120.
The first valve port g of the 4th cross valve 40d is connected with exhaust outlet b, the second valve port h of the 4th cross valve 40d is connected with one end of the 4th finned heat exchanger 30d, the 3rd valve port i of the 4th cross valve 40d is connected with finned heat exchanger valve port e, and the 4th valve port j of the 4th cross valve 40d is connected with finned heat exchanger valve port e by first throttle element 120.
The other end of the first finned heat exchanger 30a is connected with a first check valve 50a and first and heats restricting element 60a, the other end of the second finned heat exchanger 30b is connected with a second check valve 50b and second and heats restricting element 60b, the other end of the 3rd finned heat exchanger 30c is connected with a 3rd check valve 50c and the 3rd and heats restricting element 60c, the other end of the 4th finned heat exchanger 30d is connected with a 4th check valve 50d and the 4th and heats restricting element 60d, the outlet of the first check valve 50a, the outlet of the second check valve 50b, the outlet of the 3rd check valve 50c, the outlet of the 4th check valve 50d, first heats restricting element 60a, second heats restricting element 60b, 3rd heats restricting element 60c and the 4th heats restricting element 60d and is connected in common line 70 respectively, that is, first check valve 50a and first heats restricting element 60a and is connected in parallel, second check valve 50b and second heats restricting element 60b and is connected in parallel, 3rd check valve 50c and the 3rd heats restricting element 60c and is connected in parallel, 4th check valve 50d and the 4th heats restricting element 60d and is connected in parallel.
And the first check valve 50a is from the first finned heat exchanger 30a to one-way conduction on the direction of common line 70, second check valve 50b is from the second finned heat exchanger 30b to one-way conduction on the direction of common line 70,3rd check valve 50c is from the 3rd finned heat exchanger 30c to one-way conduction on the direction of common line 70, and the 4th check valve 50d is from the 4th finned heat exchanger 30d to one-way conduction on the direction of common line 70.
Falling-film heat exchanger 80 has the first mouth of pipe k, the second mouth of pipe l and the 3rd mouth of pipe m, and the first mouth of pipe k is connected with falling-film heat exchanger valve port f, and the second mouth of pipe l is communicated with common line 70 respectively with the 3rd mouth of pipe m.Wherein, it should be noted that, falling-film heat exchanger 80 also comprises delivery port n, and the operation principle etc. of falling-film heat exchanger 80 is prior art, is just not described in detail here.
The import of check-valves 90 is connected with the 3rd mouth of pipe m and the outlet of check-valves 90 is connected with common line 70, and that is, check-valves 90 is in conducting of leading from the 3rd mouth of pipe m to the direction of common line 70.Refrigeration restricting element 100 is connected with common line 70 with the second mouth of pipe l respectively, and alternatively, refrigeration restricting element 100 is electric expansion valve.
As shown in Figure 1, when net for air-source heat pump units 1000 is in refrigerating operaton, now exhaust valve port c and the e conducting of finned heat exchanger valve port and air-breathing valve port d and falling-film heat exchanger valve port f conducting, 3rd valve port i of each cross valve and the second valve port h conducting and the first valve port g and the 4th valve port j conducting, due between the 3rd valve port i and the second valve port h fluid resistance be less than fluid resistance between the first valve port g and the 4th valve port j, the refrigerant of now discharging from the exhaust outlet b of compressor 10 is flowed out by four-way change-over valve 20 and enters in each cross valve by the 3rd valve port i of each cross valve, refrigerant in each cross valve is drained in corresponding finned heat exchanger by the second valve port h, refrigerant becomes liquid after release heat respectively in four finned heat exchangers, the refrigerant that each finned heat exchanger flows out enters in common line 70 by corresponding check valve, the refrigerant of four finned heat exchanger outflows enters in falling-film heat exchanger 80 after common line 70 is converged after the throttling of refrigeration restricting element 100, refrigerant becomes gas after absorbing heat in falling-film heat exchanger 80 and evaporating, refrigerant in falling-film heat exchanger 80 escapes and enter in four-way change-over valve 20 by the first mouth of pipe k, the refrigerant of discharging from four-way change-over valve 20 is got back in compressor 10 by the air entry a of compressor 10, complete kind of refrigeration cycle.Now provide cold water at the delivery port n place of falling-film heat exchanger 80.
As shown in Figure 2, net for air-source heat pump units 1000 is when heating operation, now exhaust valve port c and the f conducting of falling-film heat exchanger valve port and air-breathing valve port d and finned heat exchanger valve port e conducting, 3rd valve port i of each cross valve and the second valve port h conducting and the first valve port g and the 4th valve port j conducting, fluid resistance due to the first mouth of pipe k is less than the fluid resistance between the first valve port g and the 4th valve port j, the cold-producing medium of now discharging from the exhaust outlet b of compressor 10 is drained in falling-film heat exchanger 80 by four-way change-over valve 20 and the first mouth of pipe k, refrigerant becomes liquid after release heat in falling-film heat exchanger 80, refrigerant in falling-film heat exchanger 80 is drained in common line 70 by check-valves 90, refrigerant in common line 70 is divided into four parts, enter in corresponding finned heat exchanger after this four parts refrigerant heats restricting element throttling respectively by four and carry out evaporation endothermic to form gas, the refrigerant of discharging from each finned heat exchanger enters in corresponding cross valve by the second valve port h, refrigerant in each cross valve is drained in four-way change-over valve 20 by the 3rd valve port i and finned heat exchanger valve port e successively, the refrigerant of discharging from four-way change-over valve 20 enters into compression in compressor 10 by the air entry a of compressor 10, thus complete and heat circulation.Now provide hot water at the delivery port n place of falling-film heat exchanger 80.
As shown in Figure 3, when net for air-source heat pump units 1000 is in heating operation and needs to defrost to the 4th finned heat exchanger 30d, now exhaust valve port c and the f conducting of falling-film heat exchanger valve port and air-breathing valve port d and finned heat exchanger valve port e conducting, 4th cross valve 40d carries out commutation action, the first valve port g of the 4th cross valve 40d and the second valve port h conducting and the 3rd valve port i and the 4th valve port j conducting, first cross valve 40a, second cross valve 40b and the 3rd cross valve 40c remains unchanged maintenance the 3rd valve port i and the second valve port h conducting and the state of the first valve port g and the 4th valve port j conducting.The refrigerant of discharging from the exhaust outlet b of compressor 10 is divided into two-way, one road refrigerant is drained in falling-film heat exchanger 80 by four-way change-over valve 20, this refrigerant becomes liquid after release heat in falling-film heat exchanger 80, another road refrigerant flows through the first valve port g of the 4th cross valve 40d and the second valve port h and enters in the 4th finned heat exchanger 30d, this refrigerant becomes liquid after release heat in the 4th finned heat exchanger 30d, and the frost layer on the 4th finned heat exchanger 30d surface is melted by the heat that refrigerant discharges.When liquid coolant pressure in the 4th finned heat exchanger 30d reaches system (i.e. net for air-source heat pump units 1000) operating pressure, 4th check valve 50d ability conducting, liquid refrigerants in 4th finned heat exchanger 30d could be discharged through the 4th check valve 50d, and another road refrigerant of discharging from the 4th check valve 50d and the road refrigerant from falling-film heat exchanger 80 discharge converge in common line 70.
Refrigerant after converging heats restricting element 60c respectively by the 3rd, second heats restricting element 60b and first heats restricting element 60a and enters into the 3rd finned heat exchanger 30c, in second finned heat exchanger 30b and the first finned heat exchanger 30a, the refrigerant of discharging from the 3rd finned heat exchanger 30c enters in four-way change-over valve 20 by the 3rd cross valve 40c, the refrigerant of discharging from the second finned heat exchanger 30b enters in four-way change-over valve 20 by the second cross valve 40b, the refrigerant of discharging from the first finned heat exchanger 30a enters in four-way change-over valve 20 by the first cross valve 40a, the refrigerant of discharging from four-way change-over valve 20 is drained in compressor 10 by air entry a, thus complete and heat circulation.
As shown in Figure 4, when net for air-source heat pump units 1000 is in heating operation and needs to defrost to the 3rd finned heat exchanger 30c, now exhaust valve port c and the f conducting of falling-film heat exchanger valve port and air-breathing valve port d and finned heat exchanger valve port e conducting, 3rd cross valve 40c carries out commutation action, the first valve port g of the 3rd cross valve 40c and the second valve port h conducting and the 3rd valve port i and the 4th valve port j conducting, first cross valve 40a, second cross valve 40b and the 4th cross valve 40d remains unchanged maintenance the 3rd valve port i and the second valve port h conducting and the state of the first valve port g and the 4th valve port j conducting.The refrigerant of discharging from the exhaust outlet b of compressor 10 is divided into two-way, one road refrigerant is drained in falling-film heat exchanger 80 by four-way change-over valve 20, this refrigerant becomes liquid after release heat in falling-film heat exchanger 80, another road refrigerant flows through the first valve port g of the 3rd cross valve 40c and the second valve port h and enters in the 3rd finned heat exchanger 30c, this refrigerant becomes liquid after release heat in the 3rd finned heat exchanger 30c, and the frost layer on the 3rd finned heat exchanger 30c surface is melted by the heat that refrigerant discharges.When liquid coolant pressure in the 3rd finned heat exchanger 30c reaches system running pressure, 3rd check valve 50c ability conducting, liquid refrigerants in 3rd finned heat exchanger 30c could be discharged through the 3rd check valve 50c, and another road refrigerant of discharging from the 3rd check valve 50c and the road refrigerant from falling-film heat exchanger 80 discharge converge in common line 70.
Refrigerant after converging heats restricting element 60d respectively by the 4th, second heats restricting element 60b and first heats restricting element 60a and enters into the 4th finned heat exchanger 30d, in second finned heat exchanger 30b and the first finned heat exchanger 30a, the refrigerant of discharging from the 4th finned heat exchanger 30d enters in four-way change-over valve 20 by the 4th cross valve 40d, the refrigerant of discharging from the second finned heat exchanger 30b enters in four-way change-over valve 20 by the second cross valve 40b, the refrigerant of discharging from the first finned heat exchanger 30a enters in four-way change-over valve 20 by the first cross valve 40a, the refrigerant of discharging from four-way change-over valve 20 is drained in compressor 10 by air entry a, thus complete and heat circulation.
As shown in Figure 5, when net for air-source heat pump units 1000 is in heating operation and needs to defrost to the second finned heat exchanger 30b, now exhaust valve port c and the f conducting of falling-film heat exchanger valve port and air-breathing valve port d and finned heat exchanger valve port e conducting, second cross valve 40b carries out commutation action, the first valve port g of the second cross valve 40b and the second valve port h conducting and the 3rd valve port i and the 4th valve port j conducting, first cross valve 40a, 3rd cross valve 40c and the 4th cross valve 40d remains unchanged maintenance the 3rd valve port i and the second valve port h conducting and the state of the first valve port g and the 4th valve port j conducting.The refrigerant of discharging from the exhaust outlet b of compressor 10 is divided into two-way, one road refrigerant is drained into falling-film heat exchanger 80 by four-way change-over valve 20 and becomes liquid after release heat in falling-film heat exchanger 80, another road refrigerant flows through the first valve port g of the second cross valve 40b and the second valve port h and enters in the second finned heat exchanger 30b, this refrigerant becomes liquid after release heat in the second finned heat exchanger 30b, and the frost layer on the second finned heat exchanger 30b surface is melted by the heat that refrigerant discharges.When liquid coolant pressure in the second finned heat exchanger 30b reaches system running pressure, second check valve 50b ability conducting, liquid refrigerants in second finned heat exchanger 30b could be discharged through the second check valve 50b, and another road refrigerant of discharging from the second check valve 50b and the road refrigerant from falling-film heat exchanger 80 discharge converge in common line 70.
Refrigerant after converging heats restricting element 60d respectively by the 4th, 3rd heats restricting element 60c and first heats restricting element 60a and enters into the 4th finned heat exchanger 30d, in 3rd finned heat exchanger 30c and the first finned heat exchanger 30a, the refrigerant of discharging from the 4th finned heat exchanger 30d enters in four-way change-over valve 20 by the 4th cross valve 40d, the refrigerant of discharging from the 3rd finned heat exchanger 30c enters in four-way change-over valve 20 by the 3rd cross valve 40c, the refrigerant of discharging from the first finned heat exchanger 30a enters in four-way change-over valve 20 by the first cross valve 40a, the refrigerant of discharging from four-way change-over valve 20 is drained in compressor 10 by air entry a, thus complete and heat circulation.
As shown in Figure 6, when net for air-source heat pump units 1000 is in heating operation and needs to defrost to the first finned heat exchanger 30a, now exhaust valve port c and the f conducting of falling-film heat exchanger valve port and air-breathing valve port d and finned heat exchanger valve port e conducting, first cross valve 40a carries out commutation action, the first valve port g of the first cross valve 40a and the second valve port h conducting and the 3rd valve port i and the 4th valve port j conducting, 3rd cross valve 40c, second cross valve 40b and the 4th cross valve 40d remains unchanged maintenance first valve port g and the 4th valve port j conducting and the state of the 3rd valve port i and the second valve port h conducting.The refrigerant of discharging from the exhaust outlet b of compressor 10 is divided into two-way, one road refrigerant is drained into falling-film heat exchanger 80 by four-way change-over valve 20 and becomes liquid after release heat in falling-film heat exchanger 80, another road refrigerant flows through the first valve port g of the first cross valve 40a and the second valve port h and enters in the first finned heat exchanger 30a, this refrigerant becomes liquid after release heat in the first finned heat exchanger 30a, and the frost layer on the first finned heat exchanger 30a surface is melted by the heat that refrigerant discharges.When liquid coolant pressure in the first finned heat exchanger 30a reaches system running pressure, first check valve 50a ability conducting, liquid refrigerants in first finned heat exchanger 30a could be discharged through the first check valve 50a, and another road refrigerant of discharging from the first check valve 50a and the road refrigerant from falling-film heat exchanger 80 discharge converge in common line 70.
Refrigerant after converging heats restricting element 60d respectively by the 4th, second heats restricting element 60b and the 3rd heats restricting element 60c and enters into the 4th finned heat exchanger 30d, in second finned heat exchanger 30b and the 3rd finned heat exchanger 30c, the refrigerant of discharging from the 4th finned heat exchanger 30d enters in four-way change-over valve 20 by the 4th cross valve 40d, the refrigerant of discharging from the second finned heat exchanger 30b enters in four-way change-over valve 20 by the second cross valve 40b, the refrigerant of discharging from the 3rd finned heat exchanger 30c enters in four-way change-over valve 20 by the 3rd cross valve 40c, the refrigerant of discharging from four-way change-over valve 20 is drained in compressor 10 by air entry a, thus complete and heat circulation.
Wherein, it should be noted that, four cross valves work independently, namely non-interference between four cross valves, above-mentioned description is illustrating of the refrigerant circulation of net for air-source heat pump units 1000 when need defrost to a finned heat exchanger, and what be worth understanding is, the present invention is not limited thereto, when net for air-source heat pump units 1000 is in heating operation, can defrost to two or three finned heat exchangers simultaneously, also can carry out circulating defrosting in turn to four finned heat exchangers.The finned heat exchanger wherein carrying out defrosting can be combined the defrost process of carrying out sequencing.
According to the net for air-source heat pump units 1000 of the embodiment of the present invention, by being provided with multiple finned heat exchanger and multiple cross valve, in defrost process, four-way change-over valve 20 does not commutate all the time, the heating operation of net for air-source heat pump units 1000 does not interrupt, falling-film heat exchanger 80 continues to provide heat to use room, ensure that the comfort of user.And in defrost process, after need reaching system pressure, corresponding check valve could conducting for the pressure carried out in the finned heat exchanger that defrosts, the refrigerant carried out in the finned heat exchanger that defrosts could be discharged, thus net for air-source heat pump units 1000 heating operation during defrosting is continual and steady, system pressure is not caused to change, therefore do not impact compressor 10, extend the service life of compressor 10, the temperature of the delivery port n of falling-film heat exchanger 80 also there will not be periodic decline simultaneously.
According to a particular embodiment of the invention, as shown in figs 1 to 6,3rd valve port i of four cross valves is communicated with by the first pipeline 110, and finned heat exchanger valve port e is connected with the first pipeline 110, and the 4th valve port j of each cross valve is connected to the first pipeline 110 by first throttle element 120.That is, the 3rd valve port i of the first cross valve 40a, the 3rd valve port i of the second cross valve 40b, the 3rd valve port i of the 3rd cross valve 40c is communicated with by the first pipeline 110 with the 3rd valve port i of the 4th cross valve 40d, and the 4th valve port j of the first cross valve 40a is connected to the first pipeline 110 by first throttle element 120, the 4th valve port j of the second cross valve 40b is connected to the first pipeline 110 by first throttle element 120, the 4th valve port j of the 3rd cross valve 40c is connected to the first pipeline 110 by first throttle element 120, the 4th valve port j of the 4th cross valve 40d is connected to the first pipeline 110 by first throttle element 120.Thus make the structure of net for air-source heat pump units 1000 simple.
As shown in figs 1 to 6, in a particular embodiment of the present invention, first valve port g of multiple cross valve is communicated with by second pipe 130, second pipe 130 is connected to exhaust outlet b, that is, the first valve port g, the first valve port g of the second cross valve 40b of the first cross valve 40a, the first valve port g of the 3rd cross valve 40c are communicated with by second pipe 130 with the first valve port g of the 4th cross valve 40d.Thus make the structure of net for air-source heat pump units 1000 simple.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (8)
1. a net for air-source heat pump units, is characterized in that, comprising:
Compressor, described compressor has air entry and exhaust outlet;
Four-way change-over valve, described four-way change-over valve has exhaust valve port, air-breathing valve port, finned heat exchanger valve port and falling-film heat exchanger valve port, and described exhaust valve port is connected with described exhaust outlet, and described air-breathing valve port is connected with described air entry;
Multiple finned heat exchanger and multiple cross valve, described multiple cross valve and described multiple finned heat exchanger one_to_one corresponding respectively, each described cross valve comprises first to fourth valve port, described first valve port of each described cross valve is connected with described exhaust outlet, described second valve port of each described cross valve is connected with one end of described finned heat exchanger, described 3rd valve port of each described cross valve is connected with described finned heat exchanger valve port, described 4th valve port of each described cross valve is connected with described finned heat exchanger valve port by first throttle element, the other end of each described finned heat exchanger is all connected with a check valve and heats restricting element, the outlet of each described check valve and each described in heat restricting element and be connected to each other by common line,
Falling-film heat exchanger, described falling-film heat exchanger has first to the 3rd mouth of pipe, and described first mouth of pipe is connected with described falling-film heat exchanger valve port, and described second mouth of pipe is communicated with described common line respectively with described 3rd mouth of pipe;
Check-valves, the import of described check-valves is connected with described 3rd mouth of pipe and the outlet of described check-valves is connected with described common line;
Refrigeration restricting element, described refrigeration restricting element is connected with described common line with described second mouth of pipe respectively.
2. net for air-source heat pump units according to claim 1, is characterized in that, described 3rd valve port of described multiple cross valve is by the first pipeline communication, and described finned heat exchanger valve port is connected with described first pipeline.
3. net for air-source heat pump units according to claim 2, is characterized in that, described 4th valve port of each described cross valve is connected to described first pipeline by described first throttle element.
4. net for air-source heat pump units according to claim 1, is characterized in that, described first valve port of described multiple cross valve is communicated with by second pipe, and described second pipe is connected to described exhaust outlet.
5. net for air-source heat pump units according to claim 1, is characterized in that, described compressor is closed or semi-hermetic refrigerating compressor unit.
6. net for air-source heat pump units according to claim 5, is characterized in that, described compressor is helical-lobe compressor.
7. net for air-source heat pump units according to claim 1, is characterized in that, described refrigeration restricting element is electric expansion valve.
8. net for air-source heat pump units according to claim 1, is characterized in that, heating restricting element described in each is electric expansion valve or heating power expansion valve.
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| CN201310675423.9A CN104713265A (en) | 2013-12-11 | 2013-12-11 | Air source heat pump unit |
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| CN201310675423.9A CN104713265A (en) | 2013-12-11 | 2013-12-11 | Air source heat pump unit |
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| CN104713265A true CN104713265A (en) | 2015-06-17 |
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| CN105987542A (en) * | 2016-01-29 | 2016-10-05 | 四川同达博尔置业有限公司 | Heat exchanger unit |
| CN110168195A (en) * | 2017-01-04 | 2019-08-23 | 西特科技责任有限公司 | It is provided with the inverse circulator of turbine |
| CN115265002A (en) * | 2021-04-29 | 2022-11-01 | 约克广州空调冷冻设备有限公司 | Heat pump system |
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Application publication date: 20150617 |