Summary of the invention
Main purpose of the present invention is at the problems referred to above of the prior art, and a kind of delay that refrigerant produces because of gravity in the header, header that can improve the parallel-flow heat exchanger heat exchange property of solving is provided.
In order to realize goal of the invention, the invention provides a kind of header, comprise first cavity and second cavity that are arranged side by side, described first cavity is provided with the flat hole in order to the flat tube of pegging graft, be provided with the refrigerant dispensing orifice that both are communicated with between described second cavity and first cavity, a part of refrigerant in the refrigerant pipeline flows to first cavity from second cavity; Described header also comprises the 3rd cavity that is arranged on the first cavity lower end, and described the 3rd cavity communicates with first cavity, and another part refrigerant in the refrigerant pipeline flows to first cavity from the bottom to top from described the 3rd cavity.
Preferably, the refrigerant inlet tube inserts the 3rd cavity, and the 3rd cavity is communicated with the lower end of second cavity.
Preferably, the port of refrigerant inlet tube is positioned at the 3rd cavity, and is positioned at the position near spray-hole, and refrigerant has at the spray-hole place than the bigger static pressure of the second cavity lower end intercommunicating pore.
Preferably, the refrigerant inlet tube is second cavity of top closure, and its part that is arranged in first cavity is provided with the refrigerant dispensing orifice, and the refrigerant inlet tube also is positioned at the 3rd cavity, and the pipeline section that is positioned at the 3rd cavity is provided with tap hole.
Preferably, be provided with plate body in described first cavity, this plate body is connected with the internal face of cavity and realizes sealing, it is first cavity that flat tube patchhole side is wherein arranged, opposite side is second cavity, is provided with dividing plate between the lower surface of first cavity and the 3rd cavity, and dividing plate connects and seal the end face of first cavity, have spray-hole to be communicated with first cavity and the 3rd cavity on the dividing plate, above-mentioned plate body surrounds the intercommunicating pore that is communicated with the 3rd cavity and second cavity with opposite side cavity inner wall face.
Preferably, be provided with division board between described first cavity and the 3rd cavity, described division board is provided with spray-hole, and the edge of this division board and the first cavity port inner wall face shape are complementary.
Preferably, also be provided with the contracted flow plate in described first cavity, the edge of this contracted flow plate and the first cavity inner wall face shape are complementary, and are provided with the contracted flow plate intercommunicating pore that is communicated with this contracted flow plate upper and lower cavity refrigerant at the contracted flow plate.
Preferably, described contracted flow plate is more little apart from header refrigerant arrival end spacing more far away; Described contracted flow plate intercommunicating pore is more little apart from header refrigerant arrival end aperture more far away.
Preferably, described contracted flow plate is more little apart from header refrigerant arrival end spacing more far away.
Preferably, described contracted flow plate intercommunicating pore is more little apart from header refrigerant arrival end aperture more far away.
The present invention provides a kind of parallel-flow heat exchanger in addition, comprises that header and an end are plugged on the some flat tubes on the described header, and is arranged on the fin between described some flat tubes.Described header comprises first cavity and second cavity that is arranged side by side, described first cavity is provided with the flat hole in order to the flat tube of pegging graft, be provided with the refrigerant dispensing orifice that both are communicated with between described second cavity and first cavity, described header also comprises the 3rd cavity that is arranged on the first cavity lower end, be provided with spray-hole between the 3rd cavity and first cavity, refrigerant flows to the 3rd cavity by the refrigerant inlet tube from the refrigerant pipeline, and upwards sprays into first cavity from spray-hole; Second cavity and refrigerant pipeline connection flow to first cavity from second cavity by the refrigerant dispensing orifice from the refrigerant of refrigerant pipeline.
As from the foregoing, at least be provided with first cavity, second cavity and the 3rd cavity in the header of the present invention, refrigerant can enter into first cavity from second cavity, when the refrigerant in first cavity is subjected to gravity fall, flow to the refrigerant upper punch of first cavity from the 3rd cavity, the refrigerant that falls can be held up, thereby avoided the refrigerant delay, improved the heat exchange property of parallel-flow heat exchanger.
The specific embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The embodiment of the invention provides a kind of header, and referring to figs. 1 through shown in Figure 3, in a preferred embodiment, this header 1 comprises first cavity 12 and second cavity 11 that is arranged side by side.First cavity 12 is provided with the flat hole in order to the flat tube 2 of pegging graft, and is provided with the refrigerant dispensing orifice 13 that both are communicated with between second cavity 11 and first cavity 12, and a part of refrigerant in the refrigerant pipeline 30 flows to first cavity 12 from second cavity 11.Header 1 also comprises the 3rd cavity 14 that is arranged on first cavity, 12 lower ends.The 3rd cavity 14 communicates with first cavity 12, and another part refrigerant in the refrigerant pipeline 30 flows to first cavity 12 from the bottom to top from the 3rd cavity 14.
With reference to shown in Figure 1, in a preferred embodiment of the present invention, be provided with spray-hole 142 between the 3rd cavity 14 and first cavity 12.Refrigerant flows to the 3rd cavity 14 from refrigerant pipeline 30, and upwards sprays into first cavity 12 from spray-hole 142; Second cavity 11 and refrigerant pipeline connection flow to first cavity 12 from second cavity 11 by refrigerant dispensing orifice 13 from the refrigerant of refrigerant pipeline 30.When the refrigerant in first cavity 12 was subjected to gravity fall, refrigerant flowed to the refrigerant upper punch of first cavity 12 from spray-hole 142, the refrigerant that falls is held up, thereby avoided the refrigerant delay, had improved the heat exchange property of parallel-flow heat exchanger.
In the embodiment of the invention, refrigerant pipeline 30 is communicated with second cavity 11 and the 3rd cavity 14 respectively, for example in a preferred embodiment, the part of refrigerant pipeline 30 can be communicated with the middle part of second cavity 11, and a part of refrigerant can be by the middle part input of this part refrigerant pipeline from second cavity 11; Another part refrigerant inlet tube 3 of refrigerant pipeline 30 is communicated with the 3rd cavity 14, to the 3rd cavity 14 input refrigerants.In another preferred embodiment, refrigerant pipeline 30 can be parts of refrigerant pipeline 30 by refrigerant inlet tube 3(refrigerant inlet tube 3) insertion the 3rd cavity 14, this refrigerant inlet tube 3 is provided with flow dividing structure, refrigerant can flow to the 3rd cavity 14 and second cavity 11 respectively from this refrigerant inlet tube 3, and the present invention is preferred this scheme that adopts on the input structure of refrigerant.
Please refer to Fig. 1, in the embodiment of the invention, header 1 is vertically placed, and the lower end of first cavity 12 and second cavity 11 is the refrigerant entrance point of header 1.Refrigerant inlet tube 3 inserts the 3rd cavity 14 that is arranged in first cavity 12 and second cavity, 11 lower ends, and to the 3rd cavity 14 input refrigerants.Refrigerant inlet tube 3 also communicates with second cavity 11, and the refrigerant in the refrigerant inlet tube 3 can flow into second cavity 11, and flows to first cavity 12 by the refrigerant dispensing orifice 13 between second cavity 11 and first cavity 12.Owing to be provided with spray-hole 142 between the 3rd cavity 14 and first cavity 12, the refrigerant that therefore is input to the 3rd cavity 14 can upwards spray into first cavity 12 from this spray-hole 142.
Concrete workflow is as follows:
When using as evaporimeter, gas coolant enters from outlet 4, flow to header 1 direction through another header 6, by between the fin 7 of centre to outside heat release, condensation then, liquefy or gas-liquid phase stream mode enter the 3rd cavity 14 from spray-hole 142; Simultaneously, a plurality of refrigerant dispensing orifices 13 from second cavity 11 enter the 3rd cavity 14, and the refrigerant behind the interflow is derived by refrigerant inlet tube 3.
When using as condenser, a refrigerant part enters from refrigerant inlet tube 3, through above-mentioned the 3rd cavity 14, flow into first cavity 12 from spray-hole 142, another part enters first cavity 11 from the 3rd cavity 14, then from a plurality of refrigerant dispensing orifice 13 ejections, through first cavity 12, enter a plurality of flat tubes 2, flow to another header 6, and from extraneous air, absorb heat of vaporization by the fin 7 of centre, form gas and discharge from outlet 1 collective.
In the embodiment of the invention, when using as condenser, a plurality of refrigerant dispensing orifices 13 from second cavity 11 of header 1, refrigerant can be easy to the impartial flat tube 2 that enters, thereby realize the equalization shunting of flat tube 2.And, owing to be provided with spray-hole 142 in the 3rd cavity 14, there is the refrigerant that to fall in the header 1 to spray the function of getting back to first cavity 12 immediately from the gas coolant that wherein flows into, can solves the problem that the lower liquid refrigerant is detained in the header 1, improve the heat exchange property of parallel-flow heat exchanger.And when air conditioner refrigerating turned round, the liquid coolant of condensation or refrigerator oil can not accumulated, be detained in the bottom of header, can flow to refrigerant inlet tube 3 smoothly.
In the embodiment of the invention, the shape of header 1 and be configured with various ways, can select flexibly, referring to shown in Figure 2, in a preferred embodiment of the present invention, be provided with division board 141 between first cavity 12 and the 3rd cavity 14, described division board 141 is provided with spray-hole 142, and the edge of this division board 141 and first cavity, 12 port inner wall face shapes are complementary.
Please refer to Fig. 3, in another preferred embodiment of the present invention, second cavity 11 is arranged in first cavity 12, and is one-body molded with a sidewall of first cavity 12, and this sidewall is relative with the sidewall with flat hole.In the embodiment of the invention, the material of header 1 can be aluminium alloy, and the 12 split settings of first cavity comprise that the curved cover plate 121 that is provided with a plurality of flat holes and uncovered bar shaped body 122 constitute, curved cover plate 121 is plugged in the body 122, and both connect the back and form first cavity 12.Second cavity 11 is arranged in body 122, and is one-body molded by mould with body 122, and the refrigerant dispensing orifice 13 between second cavity 11 and first cavity 12 also can be by the mode moulding of machining.Because body 122 and second cavity 11 are one-body molded, have saved moulding process, have saved the manufacturing cost of header 1.
Referring to Fig. 4, in another preferred embodiment of the present invention, be provided with plate body 15 in first cavity 12, this plate body 15 is connected with the internal face of cavity and realizes sealing, it is first cavity 12 that flat tube patchhole side is wherein arranged, opposite side is second cavity 11, between the lower surface of first cavity 12 and the 3rd cavity 14, be provided with dividing plate 16, dividing plate 16 connects and seals the end face of first cavity 12, have spray-hole 142 to be communicated with first cavity 12 and the 3rd cavity 11 on the dividing plate 16, above-mentioned plate body 15 surrounds the intercommunicating pore 143 that is communicated with the 3rd cavity 14 and second cavity 11 with opposite side cavity inner wall face.In the embodiment of the invention, plate body 15 is provided with refrigerant dispensing orifice 13, and refrigerant can flow to first cavity 12 by refrigerant dispensing orifice 13.The refrigerant inlet tube inserts the 3rd cavity 14, and refrigerant can flow to second cavity 11 from intercommunicating pore 143, and flows up into first cavity 12 from the 3rd cavity 14 by spray-hole 142.The embodiment of the invention is inserted the header body interior by a plate body 15, thus moulding first cavity 12 and second cavity 11, and moulding process is simple, the low cost of manufacture of header 1.
Referring to Fig. 5, in the another preferred embodiment of the present invention, refrigerant inlet tube 3 is second cavity 11 of top closure, its part that is arranged in first cavity 12 is provided with refrigerant dispensing orifice 13, refrigerant inlet tube 3 the 3rd cavity 14 of also flowing through, and the pipeline sections in the 3rd cavity 14 are provided with tap hole 111.Please refer to Fig. 5, in the present embodiment, refrigerant inlet tube 3 is bent into two sections, L-shaped setting.One section is provided with refrigerant dispensing orifice 13, and this section is inserted first cavity 12, and another section is arranged in the 3rd cavity 14, and this section is provided with tap hole 111.During parallel-flow heat exchanger work, a part of refrigerant can export the 3rd cavity 14 to from this tap hole 111, is inputed to first cavity 12 and is continued upwards injection by spray-hole 142 again; Another part refrigerant upwards sprays through the tube wall of refrigerant inlet tube 3, and exports first cavity 12 to by refrigerant dispensing orifice 13.
Referring to shown in Figure 6, on the basis of previous embodiment, in further embodiment of this invention, in first cavity 12, be provided with some contracted flow plates 5, the edge of this contracted flow plate 5 and first cavity, 12 internal face shapes are complementary, and are provided with the contracted flow plate intercommunicating pore 51 that is communicated with these contracted flow plate 5 upper and lower cavity refrigerants at contracted flow plate 5.In the embodiment of the invention, contracted flow plate 5 is provided with contracted flow plate intercommunicating pore 51, but the cooling matchmaker upwards sprays.Owing to be provided with contracted flow plate 5, can better stop refrigerant to drip downwards, avoid refrigerant to be detained.And, because there are a lot of contracted flow plates 5 in the space in the header 1, with do not have contracted flow plate 5 situation compare, more impartial to the coolant distribution of flat tube 2.Further, contracted flow plate 5 is more little apart from header refrigerant arrival end spacing more far away.Because contracted flow plate 5 is more little apart from header 1 refrigerant arrival end spacing more far away, can make the distribution of the more easy equalization of liquid coolant of above-below direction, the more easy impartial shunting of flat tube 2.Contracted flow plate intercommunicating pore 51 on the contracted flow plate 5 is along with the increase of height, and the aperture is also more little.
Further, referring to Fig. 1 to Fig. 6, in the previous embodiment of the present invention, quantity is more many more at a distance apart from header 1 refrigerant arrival end for refrigerant dispensing orifice 13, and perhaps the aperture is more big more at a distance apart from header refrigerant arrival end.So also can make the distribution of the more easy equalization of liquid coolant of above-below direction, the more easy impartial shunting of flat tube 2.
In the previous embodiment, refrigerant inlet tube 3 can insert the 3rd cavity 14, and the 3rd cavity 14 is communicated with the lower end of second cavity 11, makes the refrigerant that flows to the 3rd cavity 14 can branch to second cavity 11.
The port of refrigerant inlet tube 3 can arrange and be positioned at the 3rd cavity 14, and be positioned at the position near spray-hole 142, refrigerant has at spray-hole 142 places than the bigger static pressure of second cavity, 11 lower end intercommunicating pores 143, can form bigger refrigerant pressure like this, thereby improve the intensity that refrigerant upwards impacts, to bear the refrigerant of whereabouts.
In the embodiment of the invention; shaft centre line direction that also can refrigerant inlet tube 3 is set to substantially parallel with the horizontal tangent direction of the 3rd cavity 14 inner face circular arcs; and insert in the 3rd cavity 14 and connect; at this moment the whirlpool that forms in the 3rd cavity 14 can promote the micronize of refrigerant like this from spray-hole 142 ejections.Therefore liquid coolant is easy to form heat transfer ratio annular flow preferably in the microchannel of flat tube 2, and then can improve the performance of heat exchanger.
The present invention also provides a kind of parallel-flow heat exchanger, and this parallel-flow heat exchanger comprises that at least the header 1 of setting forth in the previous embodiment and an end are plugged on the some flat tubes 2 on the header 1, and is arranged on the fin 7 between some flat tubes 2.Among the parallel-flow heat exchanger embodiment of the present invention, the structure of header 1 and operation principle please refer to earlier figures 1 to Fig. 6 and corresponding embodiment thereof, are not described further at this.Owing to be provided with aforementioned header 1, parallel-flow heat exchanger of the present invention can avoid refrigerant to be detained, and improves heat exchange property.In addition, owing to be provided with aforementioned structure, the distribution of the more easy equalization of the liquid coolant in the parallel-flow heat exchanger of the present invention, the more easy impartial shunting of flat tube 2.Should be noted that in the embodiment of the invention, parallel-flow heat exchanger also comprise at least with header 1 be oppositely arranged, with another header 6 that flat tube 2 other ends are pegged graft, the middle part of this another header 6 is provided with refrigerant exit pipe 4.Because refrigerant exit pipe 4 is positioned at the middle position of this another header 6, it is impartial that the flow resistance of a plurality of relatively flat tubes 2 also becomes, and the coolant distribution of a plurality of flat tubes 2 is easier equalization also.
The embodiment of the invention also provides a kind of aircondition, this aircondition is provided with aforementioned parallel-flow heat exchanger, owing to be provided with aforementioned parallel-flow heat exchanger, the aircondition in the embodiment of the invention can avoid refrigerant to be trapped in header, and coolant distribution is more impartial, so heat exchange property is better.
Below only be the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.