CN105588372A - Multi-layer heat exchanger and using method thereof - Google Patents
Multi-layer heat exchanger and using method thereof Download PDFInfo
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Abstract
The invention provides a multi-layer heat exchanger and a using method thereof. The structure of the multi-layer heat exchanger is effectively improved in consideration of the influence of the pressure drop of a refrigerant on the temperature, the design that the first layer, communicated with a refrigerant inlet directly, of the multi-layer heat exchanger is set as a leeward layer in the prior art is abandoned, the arrangement sequence of all layers of the multi-layer heat exchanger is enabled to meet the counterflow design principle, and compared with a conventional multi-layer heat exchanger, the multi-layer heat exchanger, provided by the invention, has a good cooling effect.
Description
Technical field
The present invention relates to a kind of Multi-layer exchanging heat device and using method thereof, belong to air-condition heat exchanger field.
Background technology
Existing Multi-layer exchanging heat device generally comprises multiple layers that are made up of header, flat tube and fin, in the time that Multi-layer exchanging heat device uses as evaporimeter, in theory, in the time that heat exchanger uses as evaporimeter, because cold-producing medium absorbs constantly heat in flow process from the external world, its temperature should continue to increase. That is to say, in multiple layers of the Multi-layer exchanging heat device as evaporimeter, the temperature of the cold-producing medium in one deck that cold-producing medium flows at first should be minimum, and in later every one deck, refrigerant temperature is all lower than the temperature of cold-producing medium in later layer, and in one deck that cold-producing medium finally flows through, the temperature of cold-producing medium is the highest. Therefore, according to counter-flow designs principle, in the time that heat exchanger is installed, the one deck normally finally flowing through with cold-producing medium faces the direction that needs cooling air-flow to blow, i.e. conduct layer windward; The direction that one deck that cold-producing medium flows at first needs cooling air-flow to blow dorsad, as leeward layer; Adopt the expection of this setup to be: on the flow direction of air-flow, in every one deck, the temperature of cold-producing medium, all lower than the temperature of cold-producing medium in front one deck, is done like this and met counter-flow designs principle, can obtain best cooling effect.
But, by heat exchanger as in the actual use procedure of evaporimeter, cold-producing medium is in the time of heat exchanger internal flow, its pressure can continue to reduce, step-down can cause the temperature of cold-producing medium to reduce to a certain extent. In some part of above-mentioned refrigerant flowpath, the cooling-down effect that this step-down process causes likely can offset, even exceed cold-producing medium and absorb the intensification effect that heat causes from the external world. Like this, for Multi-layer exchanging heat device, although the heat that the cold-producing medium in one deck that cold-producing medium flows at first absorbs from the external world is minimum, but because this layer is directly communicated with refrigerant inlet, cold-producing medium wherein has just flowed in Multi-layer exchanging heat device, also do not pass through sufficient step-down, also not obvious because of the cooling-down effect that step-down causes, therefore this one deck may be not the minimum one deck of whole heat exchanger inner refrigerant temperature. Therefore, in fact one deck that cold-producing medium is flowed at first may and not meet counter-flow designs principle as the leeward layer of Multi-layer exchanging heat device, is difficult to the cooling effect that reaches best.
Therefore, be necessary existing technology to improve, to solve above technical problem.
Summary of the invention
The object of the present invention is to provide one more to meet counter-flow designs principle, the better Multi-layer exchanging heat device of cooling effect.
For achieving the above object, the present invention adopts following technical scheme:
A kind of Multi-layer exchanging heat device, be used for refrigeration system as evaporimeter, described Multi-layer exchanging heat device comprises refrigerant inlet, refrigerant outlet and multiple layer for cold-producing medium circulation, described refrigerant inlet is connected with the throttle part of refrigeration system, and described refrigerant outlet is connected with reservoir or the compressor of refrigeration system; Each described layer comprises the flat tube that header and multiple and described header are communicated with, and in same layer, between adjacent flat tube, is provided with fin; Described multiple layer comprises at the first skin of a side, at the second skin of relative opposite side and be arranged on the intermediate layer between described first outer and the second skin, and described the first skin is towards the air intake direction of refrigeration system, and described the second skin is towards the air-out direction of refrigeration system; Described refrigerant inlet is communicated with the header in described intermediate layer, and described refrigerant outlet is communicated with described the first outer field header, and described intermediate layer is outer and the described first outer connection via described second.
Each described layer comprises two headers, and is connected with multiple described flat tubes between two headers of same layer; A header in described intermediate layer is communicated with described refrigerant inlet, another header in described intermediate layer is communicated with a described second outer field header, described second outer field another header is communicated with a described first outer field header, and described first outer field another header is communicated with described refrigerant outlet.
Described Multi-layer exchanging heat device also comprises connector and tube connector; It is tabular and offer multiple openings that described connector is shaped as strip, described intermediate layer and described the second skin respectively have a header to offer the multiple intercommunicating pores corresponding with described opening, these two headers that offer described intercommunicating pore mutually near and be parallel to each other, described connector is welded between these two headers that offer described intercommunicating pore, and described opening is aimed at mutually with the described intercommunicating pore of these two headers, these two headers are interconnected by intercommunicating pore and described opening separately; Described tube connector strides across described intermediate layer, and a described second outer field header and a described first outer field header are interconnected.
Described intermediate layer comprises the first intermediate layer and the second intermediate layer, and described the first intermediate layer comparatively approaches described the first skin, and described the second intermediate layer comparatively approaches described the second skin; Wherein said refrigerant inlet is communicated with the header in described the second intermediate layer; Described the second intermediate layer is communicated with described the first intermediate layer via described the second skin, described the first intermediate layer and the described first outer connection.
Each described layer comprises two headers, and is connected with multiple described flat tubes between two headers of same layer; A header in described the second intermediate layer is communicated with described refrigerant inlet, another header in described the second intermediate layer is communicated with a described second outer field header, described second outer field another header is communicated with a header in described the first intermediate layer, another header in described the first intermediate layer is communicated with a described first outer field header, and described first outer field another header is communicated with described refrigerant outlet.
Described Multi-layer exchanging heat device also comprises connector and tube connector; it is tabular and offer multiple openings that described connector is shaped as strip, described the first skin, the second skin, the first intermediate layer and the second intermediate layer all respectively have a header to offer the multiple intercommunicating pores corresponding with described opening, described first outer field offer the header of described intercommunicating pore and the header that offers described intercommunicating pore in described the first intermediate layer mutually near and be parallel to each other, described second outer field offer the header of described intercommunicating pore and the header that offers described intercommunicating pore in described the second intermediate layer mutually near and be parallel to each other, described connector is welded on described the first outer field offering between the header of described intercommunicating pore and the header that offers described intercommunicating pore in described the first intermediate layer, and described the second outer field offering between the header of described intercommunicating pore and the header that offers described intercommunicating pore in described the second intermediate layer, and the described opening of described connector and the with it described intercommunicating pore of the header of welding are aimed at mutually, described the first outer field header of described intercommunicating pore and header that offers described intercommunicating pore in described the first intermediate layer of offering is interconnected by intercommunicating pore and corresponding opening separately, described the second outer field header of described intercommunicating pore and header that offers described intercommunicating pore in described the second intermediate layer of offering is interconnected by intercommunicating pore and corresponding opening separately, described tube connector strides across described the second intermediate layer, and a header in a described second outer field header and described the first intermediate layer is interconnected.
Described intermediate layer comprises the first intermediate layer and the second intermediate layer, and described the first intermediate layer comparatively approaches described the first skin, and described the second intermediate layer comparatively approaches described the second skin; Wherein said refrigerant inlet is communicated with the header in described the first intermediate layer; Described the first intermediate layer is via described the second intermediate layer and the described second outer connection, and described the second skin and described the first skin are communicated with.
Each described layer comprises two headers, and is connected with multiple described flat tubes between two headers of same layer; A header in described the first intermediate layer is communicated with described refrigerant inlet, another header in described the first intermediate layer is communicated with a header in described the second intermediate layer, another header in described the second intermediate layer is communicated with a described second outer field header, described second outer field another header is communicated with a described first outer field header, and described first outer field another header is communicated with described refrigerant outlet.
Described Multi-layer exchanging heat device also comprises connector and tube connector; it is tabular and offer multiple openings that described connector is shaped as strip, a described second outer field header, a header in described the first intermediate layer and two headers in described the second intermediate layer all offer the multiple intercommunicating pores corresponding with described opening, the header in the header that offers described intercommunicating pore in described the first intermediate layer and described the second intermediate layer mutually near and be parallel to each other, described second outer field offer the header of described intercommunicating pore and another header in described the second intermediate layer mutually near and be parallel to each other, described connector is welded between the header that offers described intercommunicating pore in described the first intermediate layer and a header in described the second intermediate layer, and described the second outer field offering between the header of described intercommunicating pore and another header in described the second intermediate layer, and the described opening of described connector and the with it described intercommunicating pore of the header of welding are aimed at mutually, the header that offers described intercommunicating pore in described the first intermediate layer and a header in described the second intermediate layer are interconnected by intercommunicating pore and corresponding opening separately, the described second outer field header of described intercommunicating pore and another header in described the second intermediate layer of offering is interconnected by intercommunicating pore and corresponding opening separately, described tube connector strides across described the first intermediate layer and the second intermediate layer, and a described second outer field header and a described first outer field header are interconnected.
The present invention also provides a kind of using method of Multi-layer exchanging heat device, wherein said Multi-layer exchanging heat device comprises refrigerant inlet, refrigerant outlet and multiple layer for cold-producing medium circulation, each described layer comprises the flat tube that header and multiple and described header are communicated with, and in same layer, between adjacent flat tube, is provided with fin; Described multiple layer comprises that the first skin, the second skin and intermediate layer, the relative both sides of described Multi-layer exchanging heat device are respectively described first outer and described the second skins, and described intermediate layer is arranged between described the first skin and the second skin; Described refrigerant inlet is communicated with the header in described intermediate layer, and described refrigerant outlet is communicated with described the first outer field header, and described intermediate layer is outer and the described first outer connection via described second; Said method comprising the steps of:
Described Multi-layer exchanging heat device is used for to refrigeration system as evaporimeter, described refrigerant inlet is connected with the throttle part of refrigeration system, described refrigerant outlet is connected with reservoir or the compressor of refrigeration system, described the first skin is towards the air intake direction of refrigeration system, and described the second skin is towards the air-out direction of refrigeration system;
Cold-producing medium in fluid state is inputted from described refrigerant inlet, flowed out from described refrigerant outlet after making described cold-producing medium flow through described multiple layer;
Need to be blown into described Multi-layer exchanging heat device from described the first skin by the cooling air-flow of refrigeration system, after making described air flow stream cross described intermediate layer, blow out from described the second skin, and pass through described flat tube and fin and described cold-producing medium heat-shift in the time flowing through described flat tube and fin.
In the Multi-layer exchanging heat device that the present invention discloses, consider that the pressure drop of cold-producing medium is on the impact of refrigerant temperature, Multi-layer exchanging heat device structure has been carried out to effective improvement, abandon the ground floor that is directly communicated with refrigerant inlet in prior art and be set to the design of leeward layer, the order that arranges of guaranteeing each layer meets counter-flow designs principle more, can produce better cooling effect compared with existing Multi-layer exchanging heat device.
Brief description of the drawings
Fig. 1 is the structural representation of the Multi-layer exchanging heat device that provides of first preferred embodiments of the present invention.
Fig. 2 is the structural representation under another visual angle of the Multi-layer exchanging heat device shown in Fig. 1.
Fig. 3 is the first header of the Multi-layer exchanging heat device shown in Fig. 1 and Fig. 2 and the structural representation of the connector corresponding with this first header.
Fig. 4 is the structural representation that the first header shown in Fig. 3 and connector weld together.
Fig. 5 is the second header of the Multi-layer exchanging heat device shown in Fig. 1 and Fig. 2 and the structural representation of the connector corresponding with this second header.
Fig. 6 is the schematic diagram of the working method of the Multi-layer exchanging heat device shown in Fig. 1.
Fig. 7 is the schematic diagram of the working method of the Multi-layer exchanging heat device that provides of second preferred embodiments of the present invention.
Fig. 8 is the schematic diagram of the working method of the Multi-layer exchanging heat device that provides of the 3rd preferred embodiments of the present invention.
Detailed description of the invention
Shown in please refer to the drawing 1 and Fig. 2, first preferred embodiments of the present invention provides a kind of Multi-layer exchanging heat device 100, and it for example can be applied in, in refrigeration system (air-conditioning) as evaporimeter. This Multi-layer exchanging heat device 100 comprises that six are shaped as header 1,2,3,4,5,6 cylindrical and that be parallel to each other, and wherein header 4,1,5 is in turn near arranging, and header 3,2,6 is in turn near arranging. Between header 1 and 2, between header 3 and 4, be all connected with multiple flat tubes 11 between header 5 and 6, like this, header 1 and 2 and be connected to the ground floor in the middle of being positioned at of flat tube between the two 11 these Multi-layer exchanging heat devices 100 of composition, header 3 and 4 and be connected to the second layer that is positioned at a side of flat tube between the two 11 these Multi-layer exchanging heat devices 100 of composition, header 5 and 6 and be connected to be positioned at relative opposite side the 3rd layer of flat tube 11 these Multi-layer exchanging heat devices 100 of composition between the two. In flat tube 11, be provided with and be communicated with corresponding header, for the microchannel of cold-producing medium circulation, between adjacent flat tube 11 in every one deck of this Multi-layer exchanging heat device 100, be provided with the fin 10 of shutter shape (herein for the ease of observing, only show part fin 10), for increasing heat exchange efficiency.
This Multi-layer exchanging heat device 100 also comprises connector 12, backing plate 13, tube connector 14, refrigerant inlet 7 and refrigerant outlet 9. Wherein connector 12 is arranged between header 2 and 3, and header 2 and 3 is interconnected by connector 12, also interfixes by connector 12 simultaneously and is spaced from each other certain distance. Backing plate 13 is arranged between header 1 and 4, between header 1 and 5 and between header 3 and 6, two headers that are arranged on backing plate 13 both sides interfix by backing plate 13 and are spaced from each other certain distance. Refrigerant inlet 7 is communicated with header 1, and refrigerant outlet 9 is communicated with header 6, and tube connector 14 is interconnected header 4 and 5. Below the concrete shape to above-mentioned these parts and package assembly are described in detail.
See also Fig. 3, Fig. 4 and Fig. 5, offer to the header equal intervals of this Multi-layer exchanging heat device 100 multiple punchings 101. The shape of this punching 101 is mutually corresponding with the end shape of flat tube 12, and in above-mentioned every one deck, the punching 101 of two headers of this layer is inserted respectively at the two ends of flat tube 11, thereby realizes and being communicated with these two headers respectively. Obviously, mode multiple flat tubes 11 of pegging graft like this between every layer two headers. Because multiple punchings 101 spacing on same header equate, therefore the spacing of the multiple flat tubes 11 in every one deck also equates, the fin 10 of same specification so just can be all installed between any two adjacent flat tubes 11 of every one deck. In addition, in order to meet different connection demands, in this Multi-layer exchanging heat device 100, in fact exist the header of two kinds of different structures. A header for structure, example is header 2 as shown in Figure 5, on its body, except offering above-mentioned punching 101, also offers equally spacedly multiple openings 102 simultaneously; The architectural feature of header 3 is similar to this header 2. Like this, this header 2,3, except can being communicated with flat tube 11, can also utilize its opening 102 to coordinate with the intercommunicating pore 121 being opened on connector 12, and header 2,3 is interconnected via connector 12. The header of another kind of structure, example is header 1 as shown in Figure 5, offers above-mentioned punching 101 on its body, but does not offer above-mentioned intercommunicating pore 102; And the structure of header 4,5,6 is also similar to this header 1, therefore header 1,4,5,6 can only be communicated with flat tube 11.
Connector 12 can be formed from aluminium, and it is shaped as the tabular of strip, all cave in down the concave surface of formation arc of its both side surface, make that connector 12 forms that both sides are thick, the shape of intermediate thin (for example, according to the direction shown in Fig. 6, the both sides up and down of connector 12 are thicker, and centre is thinner). The concave surface that these connector 12 both sides form is mutually corresponding with the part side view that offers intercommunicating pore 102 of header 2,3, and the middle part of this connector 12 also offers multiple openings 121 mutual corresponding with the intercommunicating pore 102 of header 2,3 equally spacedly. Header 2,3 is fitted on the concave surface of connector 12 both sides formation with a part for its side respectively, and the intercommunicating pore 102 of header 2,3 is all aimed at opening 121, and header 2,3 can be interconnected by intercommunicating pore 102 and opening 121. After the intercommunicating pore 102 of determining header 2,3 is all aimed at the opening 121 of connector 12, can adopt the modes such as for example welding that header 2,3 and connector 12 are interfixed, so just utilize connector 12 that header 2,3 is fixing relative to each other, and when header 2,3 is spaced from each other to certain distance, header 2,3 is interconnected.
Backing plate 13 can be formed from aluminium, it is tabular that it is shaped as bar shaped, the size and shape in the cross section on its width is similar to the size and shape in the cross section on connector 12 widths, that is to say, the both side surface of backing plate 13 formation and the header part side view corresponding arc-shaped concave mutually that all caves in down, makes that its formation both sides are thick, the shape of intermediate thin is (for example,, according to the direction shown in Fig. 6, the both sides up and down of backing plate 13 are thicker, and centre is thinner). In the present embodiment, the length of backing plate 13 is less than the length of connector 12, between header 1 and 4, between header 1 and 5, be all provided with two backing plates 13 separated by a distance between header 2 and 6. The concave surface that each backing plate 13 both sides form is fitted with the part side of two headers that are positioned at these backing plate 13 both sides respectively, and utilize the mode such as welding that this backing plate 13 and two headers being positioned at its both sides are interfixed, make between header 1 and 4, between header 1 and 5, all interfix and be spaced from each other certain distance by backing plate 13 between header 2 and 6. Like this, six headers fit together by above-mentioned connector 12, backing plate 13 and flat tube 11.
In the present embodiment, Multi-layer exchanging heat device 100 also comprises the side plate 8 that is arranged on every one deck two ends. This side plate 8 is the flat boards that adopt the material identical with flat tube 11 to make, and its width is identical with flat tube 11, and length is less than the length of flat tube 11. In present embodiment, the quantity of side plate 8 is six, all be respectively equipped with a side plate 8 in the outside of two flat tubes 11 at every one deck two ends, side plate 8 is parallel with flat tube 11, and each side plate 8 and and its flat tube 11 approaching the most (the namely flat tube 11 of every one deck end) between be also provided with fin 10, to increase as much as possible heat exchange area, improve heat exchange efficiency.
Refrigerant inlet 7, refrigerant outlet 9 and tube connector 14 can be the bend pipes of aluminum, and in the present embodiment, refrigerant inlet 7 and refrigerant outlet 9 are all arranged on the same one end in Multi-layer exchanging heat device 100 overall structures, as shown in Figure 3; And tube connector 14 is arranged on the other end in Multi-layer exchanging heat device 100 overall structures, as shown in Figure 4. One end of refrigerant inlet 7 is communicated with one end of header 1, and the other end is towards a lateral buckling at header 2,3,6 places, for the existing throttle part (not shown) of refrigeration system, for example expansion valve or capillary connect; One end of refrigerant outlet 9 is communicated with one end of header 6, and the other end is towards a lateral buckling at header 1,4,5 places, for being connected with liquid reservoir or the compressor (not shown) of refrigeration system. Tube connector 14 strides across ground floor, is connected between the end of header 4 and the end of header 5. Be appreciated that according to concrete environment for use, the concrete shape of refrigerant inlet 7, refrigerant outlet 9 and tube connector 14 may have corresponding variation, but is all encompassed within the scope of claim of the present invention.
Refer to Fig. 6, in this Multi-layer exchanging heat device 100 is arranged on refrigeration system when evaporimeter uses, it is the air intake direction that is arranged on refrigeration system by above-mentioned the 3rd layer, even if also the 3rd layer faces the direction (i.e. direction shown in arrow A 1 in figure) that needs cooling air-flow to blow, as one deck that the air-flow cooling with needs contact at first in Multi-layer exchanging heat device 100, windward layer, the second layer is arranged on the air-out direction of refrigeration system, even if also the second layer needs the direction that cooling air-flow blows dorsad, as last one deck with needing cooling air-flow to contact in Multi-layer exchanging heat device 100, i.e. leeward layer, that is to say, needing cooling air-flow is the 3rd layer, ground floor, the second layer by the order of this Multi-layer exchanging heat device 100. (may be liquid in fluid state, gas or the mixing of the two) cold-producing medium after throttle part adjust flux, flow into from refrigerant inlet 7, along the direction shown in the arrow B 1 in figure, flow through successively header 1, flat tube 11 between header 1 and header 2, header 2, connector 12 between header 2 and header 3, header 3, flat tube 11 between header 3 and header 4, header 4, tube connector 14, header 5, flat tube 11 between header 5 and header 6, header 6, finally flow out from refrigerant outlet 9, enter the liquid reservoir of refrigeration system or compressor to circulate. that is to say, the order that cold-producing medium flows through each layer of this Multi-layer exchanging heat device 100 is ground floor, the second layer, the 3rd layer. in the time that cold-producing medium flows through flat tube 11 each time, can absorb extraneous heat by flat tube 11 and fin 10.
In the above-mentioned flow process of cold-producing medium, the pressure of cold-producing medium can continue to reduce, and step-down can cause the temperature of cold-producing medium to reduce to a certain extent. In some part (the routine second layer described above) of above-mentioned refrigerant flowpath, the cooling-down effect that this step-down process causes likely can be offset, and even exceedes cold-producing medium and absorbs the intensification effect that heat causes from the external world. Like this, although the heat that the cold-producing medium in ground floor absorbs from the external world is minimum, but because the cold-producing medium Range compress machine in ground floor is nearest, also do not pass through sufficient step-down, the cooling-down effect causing because of step-down is also not obvious, and therefore ground floor is not often the minimum one deck of whole heat exchanger inner refrigerant temperature. In actual use, the cold-producing medium in the second layer is owing to having passed through sufficient step-down, and the cooling-down effect that step-down causes is the most obvious, and therefore temperature is generally lower than the cold-producing medium in ground floor; Although and cold-producing medium pressure in the 3rd layer is minimum, owing to having absorbed maximum heats from the external world, therefore temperature is general or higher than the cold-producing medium in ground floor. That is to say, the refrigerant temperature sequence in this Multi-layer exchanging heat device 100 is generally that the refrigerant temperature in the 3rd layer is the highest, and the refrigerant temperature in ground floor is taken second place, and the refrigerant temperature in the second layer is minimum. Therefore, in present embodiment, be set to layer windward by the 3rd layer of this Multi-layer exchanging heat device 100, ground floor is placed in the middle, the second layer is as leeward layer, meet counter-flow designs principle, the temperature of having guaranteed cold-producing medium in each layer is along reducing gradually to the direction of leeward layer from layer windward, compared with Multi-layer exchanging heat device described in above-mentioned background technology, can obtain better cooling effect.
In the above-described embodiment, described ground floor, the second layer, the form of presentation of the 3rd layer are just for the ease of distinguishing each layer of Multi-layer exchanging heat device 100, its numerical order is the sequence of flow in Multi-layer exchanging heat device 100 corresponding to cold-producing medium, but not necessarily corresponding to manufacturing sequence and the assembling sequence of each layer. Certainly, also can be named above-mentioned each layer according to other standards, for example, can, according to each layer of residing position, above-mentioned ground floor be called to intermediate layer, the 3rd layer is called the first skin, and the second layer is called the second skin.
In other embodiments of the present invention, the Multi-layer exchanging heat device number of plies as preferred embodiments also can be more than three layers, as long as in the time that it uses as evaporimeter, the order that arranges of each layer still meets counter-flow designs principle, and the temperature of guaranteeing cold-producing medium in each layer is along reducing gradually to the direction of leeward layer from layer windward. Below two heat exchanger embodiments more than three layers of the present invention are illustrated as example.
Refer to Fig. 7, second preferred embodiments of the present invention provides a kind of Multi-layer exchanging heat device 200, and it can be applied in refrigeration system as evaporimeter. This Multi-layer exchanging heat device 200 comprises eight headers that are parallel to each other 21,22,23,24,25,26,27,28. Wherein in turn (according to the from left to right direction shown in Fig. 8) close setting of header 28,25,21,24, the structure of these four headers is similar to the header 1,4,5,6 of above-mentioned Multi-layer exchanging heat device 100, do not offer intercommunicating pore 102 or any similar structures, between header 28 and 25, between 25 and 21, between 21 and 24, be all welded with above-mentioned backing plate 13, interfix and separated by a distance by backing plate 13. Between header 24 and 25, striding across ground floor by the tube connector (not shown) similar to above-mentioned tube connector 14 is interconnected. Header 27,26,22,23 is (according to the from left to right direction shown in Fig. 8) close setting in turn, the structure of these four headers is similar to the header 2,3 of above-mentioned Multi-layer exchanging heat device 100, all offer the intercommunicating pore (not shown) similar to above-mentioned intercommunicating pore 102, wherein between header 27 and 26, be all welded with above-mentioned connector 12 between 22 and 23, make between header 27 and 26, interfix by connector 12 between 22 and 23 and separated by a distance; Meanwhile, these four headers all aim at its intercommunicating pore opening 121 (not shown) that corresponding connector 12 is offered, and make between header 27 and 26, be all interconnected by connector 12 between 22 and 23. Between header 26 and 22, be welded with above-mentioned backing plate 13, interfix by backing plate 13 also separated by a distance. Above-mentioned each header can be consistent with above-mentioned Multi-layer exchanging heat device 100 with concrete assembling and the method for attachment of corresponding connector, backing plate, tube connector, here without repeat specification.
Between header 21 and 22, between 23 and 24, between 25 and 26, between 27 and 28, be all connected with multiple flat tubes 11, make header 21,22 and be connected to flat tube between the two 11 to form the ground floor of these Multi-layer exchanging heat devices 200, header 23,24 and be connected to flat tube between the two 11 and form the second layer of these Multi-layer exchanging heat devices 200, header 25,26 and be connected to flat tube between the two 11 and form the 3rd layer of this Multi-layer exchanging heat devices 200, header 27,28 be connected to the 4th layer of flat tube 11 these Multi-layer exchanging heat devices 200 of formation between the two. The fin (not shown) of shutter shape can be set between the adjacent flat tube 11 of every layer, and flat tube 11 outsides at every layer of two ends can also arrange fin and side plate (not shown), to strengthen heat transfer effect. The fin of this Multi-layer exchanging heat device 200 is all similar with side plate 8 to the fin 10 of above-mentioned Multi-layer exchanging heat device 100 with the feature of side plate, here without repeat specification. One end of header 21 is connected with the refrigerant inlet 7 being communicated with the throttle part (not shown) of refrigeration system, and one end of header 28 is connected with the refrigerant outlet 9 being communicated with liquid reservoir or the compressor (not shown) of refrigeration system.
When this Multi-layer exchanging heat device 200 is used, cold-producing medium in fluid state is after throttle part adjust flux, flow into from refrigerant inlet 7, along the direction shown in the arrow B 2 in figure, flow through successively header 21, flat tube 11 between header 21 and header 22, header 22, connector 12 between header 22 and header 23, header 23, flat tube 11 between header 23 and header 24, header 24, tube connector, header 25, flat tube 11 between header 25 and header 26, header 26, connector 12 between header 26 and header 27, header 27, flat tube 11 between header 27 and header 28, header 28, finally flow out from refrigerant outlet 9, enter liquid reservoir or compressor to realize circulation. that is to say, the order that cold-producing medium flows through each layer of this Multi-layer exchanging heat device 200 is ground floor, the second layer, the 3rd layer, the 4th layer. in the time that cold-producing medium flows through flat tube 11 each time, can absorb extraneous heat by flat tube 11 and fin 10.
According to the principle similar to above-mentioned Multi-layer exchanging heat device 100, when cold-producing medium flows in this Multi-layer exchanging heat device 200, generally ground floor not of the minimum position of its temperature, but the second layer or the 3rd layer. For example, in the situation that refrigerant superheat degree is lower, the temperature sequence of the cold-producing medium of each layer is generally that the refrigerant temperature in the second layer is minimum, and the refrigerant temperature in ground floor is slightly high, refrigerant temperature in the 3rd layer is higher, and the refrigerant temperature in the 4th layer is the highest. Therefore, in present embodiment, in order to be applicable to this type of situation, it is the air intake direction that is arranged on Multi-layer exchanging heat device 200 by the 4th layer, even if also the 4th layer faces the direction (i.e. direction shown in arrow A 2 in figure) that needs cooling air-flow to blow, as one deck that the air-flow cooling with needs contact at first in Multi-layer exchanging heat device 200, windward layer; The second layer is arranged on the air-out direction of Multi-layer exchanging heat device 200, even if also the second layer needs the direction that cooling air-flow blows dorsad, as last one deck with needing cooling air-flow to contact in Multi-layer exchanging heat device 200, i.e. leeward layer; Ground floor and the 3rd layer are as two intermediate layers. Making like this to need cooling air-flow is the 4th layer, the 3rd layer, ground floor, the second layer by the order of this Multi-layer exchanging heat device 100. Can meet like this counter-flow designs principle, the temperature of guaranteeing cold-producing medium in each layer, along reducing gradually to the direction of leeward layer from layer windward, obtains good cooling effect.
Refer to Fig. 8, the 3rd preferred embodiments of the present invention provides a kind of Multi-layer exchanging heat device 300, and it can be applied in refrigeration system as evaporimeter. This Multi-layer exchanging heat device 300 comprises eight headers that are parallel to each other 31,32,33,34,35,36,37,38. Wherein in turn (according to the from left to right direction shown in Fig. 8) close setting of header 38,31,34,35, header 37,36,32,33 is (according to the from left to right direction shown in Fig. 8) close setting in turn. The structure of header 31,36,37,38 is similar to the header of above-mentioned Multi-layer exchanging heat device 100 1,4,5,6, does not offer intercommunicating pore 102 or any similar structures; And the structure of header 32,33,34,35 and the header of above-mentioned Multi-layer exchanging heat device 100 2,3 are similar, all offer the intercommunicating pore (not shown) similar to above-mentioned intercommunicating pore 102. Between header 31 and 34, between 31 and 38, between 32 and 37, between 33 and 36, be all welded with above-mentioned backing plate 13, interfix and separated by a distance by backing plate 13. Between header 36 and 37, stride across ground floor by the tube connector (not shown) similar to above-mentioned tube connector 14 and the second layer is interconnected. Between header 32 and 33, between 34 and 35, be all welded with above-mentioned connector 12, make between header 32 and 33, interfix by connector 12 between 34 and 35 and separated by a distance; Meanwhile, header 32,33,34,35 all aims at its intercommunicating pore opening 121 (not shown) that corresponding connector 12 is offered, and makes between header 32 and 33, is all interconnected by connector 12 between 34 and 35. Above-mentioned each header can be consistent with above-mentioned Multi-layer exchanging heat device 100 with concrete assembling and the method for attachment of corresponding connector, backing plate, tube connector, here without repeat specification.
Between header 31 and 32, between 33 and 34, between 35 and 36, between 37 and 38, be all connected with multiple flat tubes 11, make header 31,32 and be connected to flat tube between the two 11 to form the ground floor of these Multi-layer exchanging heat devices 300, header 33,34 and be connected to flat tube between the two 11 and form the second layer of these Multi-layer exchanging heat devices 300, header 35,36 and be connected to flat tube between the two 11 and form the 3rd layer of this Multi-layer exchanging heat devices 300, header 37,38 be connected to the 4th layer of flat tube 11 these Multi-layer exchanging heat devices 300 of formation between the two. The fin (not shown) of shutter shape can be set between the adjacent flat tube 11 of every layer, and flat tube 11 outsides at every layer of two ends can also arrange fin and side plate (not shown), to strengthen heat transfer effect. The fin of this Multi-layer exchanging heat device 200 is all similar with side plate 8 to the fin 10 of above-mentioned Multi-layer exchanging heat device 100 with the feature of side plate, here without repeat specification. One end of header 31 is connected with the refrigerant inlet 7 being communicated with the throttle part (not shown) of refrigeration system, and one end of header 38 is connected with the refrigerant outlet 9 being communicated with liquid reservoir or the compressor (not shown) of refrigeration system.
When this Multi-layer exchanging heat device 300 is used, cold-producing medium in fluid state is after throttle part adjust flux, flow into from refrigerant inlet 7, along the direction shown in the arrow B 3 in figure, flow through successively header 31, flat tube 11 between header 31 and header 32, header 32, connector 12 between header 32 and header 33, header 33, flat tube 11 between header 33 and header 34, header 34, connector 12 between header 34 and header 35, header 35, flat tube 11 between header 35 and header 36, header 36, tube connector, header 37, flat tube 11 between header 37 and header 38, header 38, finally flow out from refrigerant outlet 9, enter liquid reservoir or compressor and realize circulation. that is to say, the order that cold-producing medium flows through each layer of this Multi-layer exchanging heat device 200 is ground floor, the second layer, the 3rd layer, the 4th layer. in the time that cold-producing medium flows through flat tube 11 each time, can absorb extraneous heat by flat tube 11 and fin 10.
According to the principle similar to above-mentioned Multi-layer exchanging heat device 100, when cold-producing medium flows in this Multi-layer exchanging heat device 300, generally ground floor not of the minimum position of its temperature, but the second layer or the 3rd layer. For example, in the situation that refrigerant superheat degree is higher, the temperature sequence of the cold-producing medium of each layer is generally that the refrigerant temperature in the 3rd layer is minimum, and the refrigerant temperature in the second layer is slightly high, refrigerant temperature in ground floor is higher, and the refrigerant temperature in the 4th layer is the highest. Therefore, in present embodiment in order to be applicable to this kind of situation, it is the air intake direction that is arranged on Multi-layer exchanging heat device 300 by the 4th layer, even if also the 4th layer faces the direction (i.e. direction shown in arrow A 3 in figure) that needs cooling air-flow to blow, as one deck that the air-flow cooling with needs contact at first in Multi-layer exchanging heat device 300, windward layer; The 3rd layer is arranged on the air-out direction of Multi-layer exchanging heat device 300, though also the 3rd layer of direction that needs dorsad cooling air-flow to blow, as last one deck with needing cooling air-flow to contact in Multi-layer exchanging heat device 300, leeward layer; Ground floor and the second layer are as two intermediate layers. Making like this to need cooling air-flow is the 4th layer, ground floor, the second layer, the 3rd layer by the order of this Multi-layer exchanging heat device 300. Can meet like this counter-flow designs principle, the temperature of guaranteeing cold-producing medium in each layer, along reducing gradually to the direction of leeward layer from layer windward, obtains good cooling effect.
In the above-described embodiment, described ground floor, the second layer, the form of presentation of the 3rd layer, the 4th layer are just for the ease of distinguishing each layer of Multi-layer exchanging heat device 200,300, its numerical order is the sequence of flow in Multi-layer exchanging heat device 200,300 corresponding to cold-producing medium, but not necessarily corresponding to manufacturing sequence and the assembling sequence of each layer. Certainly, also can be named above-mentioned each layer according to other standards, for example, can be according to each layer of residing position, be called the first skin by above-mentioned the 4th layer of Multi-layer exchanging heat device 200, the second layer is called the second skin, and ground floor is called the second intermediate layer (because this layer is positioned at middle and comparatively close the second skin), and the 3rd layer is called the first intermediate layer (in the middle of being positioned at because of this layer and comparatively near the first skin); And be called the first skin by above-mentioned the 4th layer of Multi-layer exchanging heat device 300, the 3rd layer is called the second skin, ground floor is called the first intermediate layer (because this layer is positioned at middle and comparatively close the first skin), and the second layer is called the second intermediate layer (in the middle of being positioned at because of this layer and comparatively near the second skin).
Be appreciated that, in the other embodiment of the present invention, the number of plies of heat exchanger can also be more, as long as guarantee Multi-layer exchanging heat device order that arranges of each layer when the evaporimeter is met to counter-flow designs principle, in each layer the temperature of cold-producing medium along from layer reducing gradually to the direction of leeward layer windward. In concrete assembling mode, be interconnected at needs, and belong to respectively between the header of adjacent two layers and can all interfix and be communicated with by above-mentioned connector, be interconnected at needs, and belong to respectively between non-conterminous two-layer header and can all be interconnected by above-mentioned tube connector, belonging to respectively adjacent two layers, and can all interfixed by above-mentioned backing plate between the header that does not need to be interconnected.
The Multi-layer exchanging heat device providing based on above-mentioned each embodiment of the present invention, the present invention also provides corresponding Multi-layer exchanging heat device using method. A preferred embodiments of the method comprises the following steps:
A kind of Multi-layer exchanging heat device is provided, described Multi-layer exchanging heat device comprises refrigerant inlet, refrigerant outlet and multiple layer for cold-producing medium circulation, each described layer comprises the flat tube that header and multiple and described header are communicated with, and in same layer, between adjacent flat tube, is provided with fin; Described multiple layer comprises that the first skin, the second skin and intermediate layer, the relative both sides of described Multi-layer exchanging heat device are respectively described first outer and described the second skins, and described intermediate layer is arranged between described the first skin and the second skin; Described refrigerant inlet is communicated with the header in described intermediate layer, and described refrigerant outlet is communicated with described the first outer field header, and described intermediate layer is outer and the described first outer connection via described second;
Described Multi-layer exchanging heat device is used for to refrigeration system as evaporimeter, described refrigerant inlet is connected with the throttle part of refrigeration system, described refrigerant outlet is connected with reservoir or the compressor of refrigeration system, described the first skin is towards the air intake direction of refrigeration system, and described the second skin is towards the air-out direction of refrigeration system;
Cold-producing medium in fluid state is inputted from described refrigerant inlet, flowed out from described refrigerant outlet after making described cold-producing medium flow through described multiple layer;
Need to be blown into described Multi-layer exchanging heat device from described the first skin by the cooling air-flow of refrigeration system, after making described air flow stream cross described intermediate layer, blow out from described the second skin, and pass through described flat tube and fin and described cold-producing medium heat-shift in the time flowing through described flat tube and fin.
In another preferred embodiments of the method, described intermediate layer comprises the first intermediate layer and the second intermediate layer, and described the first intermediate layer comparatively approaches described the first skin, and described the second intermediate layer comparatively approaches described the second skin; Wherein said refrigerant inlet is communicated with the header in described the second intermediate layer; Described the second intermediate layer is communicated with described the first intermediate layer via described the second skin, described the first intermediate layer and the described first outer connection.
In another preferred embodiments of the method, described intermediate layer comprises the first intermediate layer and the second intermediate layer, and described the first intermediate layer comparatively approaches described the first skin, and described the second intermediate layer comparatively approaches described the second skin; Wherein said refrigerant inlet is communicated with the header in described the first intermediate layer; Described the first intermediate layer is via described the second intermediate layer and the described second outer connection, and described the second skin and described the first skin are communicated with.
In Multi-layer exchanging heat device and using method thereof that the present invention discloses, consider that the pressure drop of cold-producing medium is on the impact of temperature, Multi-layer exchanging heat device structure has been carried out to effective improvement, abandon the ground floor that is directly communicated with refrigerant inlet in prior art and be set to the design of leeward layer, the order that arranges of guaranteeing each layer meets counter-flow designs principle more, can produce better cooling effect compared with existing Multi-layer exchanging heat device.
It should be noted that: above embodiment is only for illustrating the present invention and unrestricted technical scheme described in the invention, above about " on ", the description in the orientation such as D score, " left side ", " right side " is just for the ease of understanding content of the present invention, not limitation of the invention. Although this description has been described in detail the present invention with reference to the above embodiments, but, those of ordinary skill in the art is to be understood that, person of ordinary skill in the field still can modify or be equal to replacement the present invention, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, all should be encompassed within the scope of claim of the present invention.
Claims (10)
1. a Multi-layer exchanging heat device,, is characterized in that as evaporimeter for refrigeration system: described manyLayer heat exchanger comprises refrigerant inlet, refrigerant outlet and multiple layer for cold-producing medium circulation, described refrigerationAgent entrance is connected with the throttle part of refrigeration system, the reservoir of described refrigerant outlet and refrigeration system orCompressor connects; Each described layer comprises the flat tube that header and multiple and described header are communicated with, sameIn layer, between adjacent flat tube, be provided with fin; Described multiple layer comprises the first skin, the position that are positioned at a sideIn the second skin of relative opposite side and be arranged between described first outer and the second skin inInterbed, and described the first skin is towards the air intake direction of refrigeration system, and described the second skin is towards refrigeration systemThe air-out direction of system; Described refrigerant inlet is communicated with the header in described intermediate layer, and described cold-producing medium goes outMouth is communicated with described the first outer field header, and described intermediate layer is outer with described first via described secondOuter connection.
2. Multi-layer exchanging heat device as claimed in claim 1, is characterized in that: each described layer comprises twoHeader, and be connected with multiple described flat tubes between two headers of same layer; One of described intermediate layerIndividual header is communicated with described refrigerant inlet, outside another header in described intermediate layer and described secondHeader of layer is communicated with, described second outer field another header and described first outer field oneHeader is communicated with, and described first outer field another header is communicated with described refrigerant outlet.
3. Multi-layer exchanging heat device as claimed in claim 2, is characterized in that: described Multi-layer exchanging heat device also wrapsDraw together connector and tube connector; It is tabular and offer multiple openings, institute that described connector is shaped as stripStating intermediate layer and described the second skin respectively has a header to offer the multiple companies corresponding with described openingThrough hole, these two headers that offer described intercommunicating pore mutually near and be parallel to each other, described connectorBe welded between these two headers that offer described intercommunicating pore, and described opening and this two affluxsThe described intercommunicating pore of pipe is aimed at mutually, makes these two headers by intercommunicating pore and described opening separatelyBe interconnected; Described tube connector strides across described intermediate layer, by described a second outer field header and instituteStating a first outer field header is interconnected.
4. Multi-layer exchanging heat device as claimed in claim 1, is characterized in that: described intermediate layer comprises firstIntermediate layer and the second intermediate layer, described the first intermediate layer comparatively approaches described the first skin, in described secondInterbed comparatively approaches described the second skin; The afflux in wherein said refrigerant inlet and described the second intermediate layerPipe is communicated with; Described the second intermediate layer outer is communicated with described the first intermediate layer via described second, and described theOne intermediate layer and the described first outer connection.
5. Multi-layer exchanging heat device as claimed in claim 4, is characterized in that: each described layer comprises twoHeader, and be connected with multiple described flat tubes between two headers of same layer; Described the second intermediate layerA header be communicated with described refrigerant inlet, another header in described the second intermediate layer and instituteState a second outer field header and be communicated with, in described second outer field another header and described firstHeader of interbed is communicated with, another header in described the first intermediate layer and described first outer fieldA header is communicated with, and described first outer field another header is communicated with described refrigerant outlet.
6. Multi-layer exchanging heat device as claimed in claim 5, is characterized in that: described Multi-layer exchanging heat device also wrapsDraw together connector and tube connector; It is tabular and offer multiple openings, institute that described connector is shaped as stripStating the first skin, the second skin, the first intermediate layer and the second intermediate layer all respectively has a header to offerThe multiple intercommunicating pores corresponding with described opening, described the first outer field afflux that offers described intercommunicating porePipe and the header that offers described intercommunicating pore in described the first intermediate layer are mutually close and be parallel to each other, instituteState the described company that offers in the second outer field header that offers described intercommunicating pore and described the second intermediate layerThe header of through hole mutually near and be parallel to each other, described connector is welded on described the first outer field offeringHave between the header of described intercommunicating pore and the header that offers described intercommunicating pore in described the first intermediate layer,And described second outer fieldly offer the header of described intercommunicating pore and offering of described the second intermediate layerBetween the header of described intercommunicating pore, and the described opening of described connector and with it welding headerDescribed intercommunicating pore mutually aim at, make described the first outer field header and institute that offers described intercommunicating poreState the header that offers described intercommunicating pore in the first intermediate layer by intercommunicating pore and corresponding circulation separatelyHole is interconnected, described the second outer field header and described the second intermediate layer that offers described intercommunicating poreIntercommunicating pore and the corresponding opening of the header that offers described intercommunicating pore by be separately interconnected;Described tube connector strides across described the second intermediate layer, by a described second outer field header and described firstA header in intermediate layer is interconnected.
7. Multi-layer exchanging heat device as claimed in claim 1, is characterized in that: described intermediate layer comprises firstIntermediate layer and the second intermediate layer, described the first intermediate layer comparatively approaches described the first skin, in described secondInterbed comparatively approaches described the second skin; The afflux in wherein said refrigerant inlet and described the first intermediate layerPipe is communicated with; Described the first intermediate layer is via described the second intermediate layer and described the second outer connection, and described theTwo outer and the described first outer connections.
8. Multi-layer exchanging heat device as claimed in claim 7, is characterized in that: each described layer comprises twoHeader, and be connected with multiple described flat tubes between two headers of same layer; Described the first intermediate layerA header be communicated with described refrigerant inlet, another header in described the first intermediate layer and instituteHeader stating the second intermediate layer is communicated with, another header in described the second intermediate layer and described theTwo outer field header are communicated with, described second outer field another header and described first outer fieldA header is communicated with, and described first outer field another header is communicated with described refrigerant outlet.
9. Multi-layer exchanging heat device as claimed in claim 8, is characterized in that: described Multi-layer exchanging heat device also wrapsDraw together connector and tube connector; It is tabular and offer multiple openings, institute that described connector is shaped as stripState a header and described second intermediate layer in a second outer field header, described the first intermediate layerTwo headers all offer the multiple intercommunicating pores corresponding with described opening, described the first intermediate layerOffer the header of described intercommunicating pore and a header in described the second intermediate layer mutually close and mutualParallel, another of described the second outer field header that offers described intercommunicating pore and described the second intermediate layerIndividual header mutually near and be parallel to each other, described connector is welded on offering of described the first intermediate layerBetween a header in the header of described intercommunicating pore and described the second intermediate layer and outside described secondBetween the header that offers described intercommunicating pore and another header in described the second intermediate layer of layer, andThe described opening of described connector and the with it described intercommunicating pore of the header of welding are aimed at mutually, make instituteState the header that offers described intercommunicating pore in the first intermediate layer and a header in described the second intermediate layerIntercommunicating pore by separately and corresponding opening are interconnected, and described second outer fieldly offers described companyThe intercommunicating pore of another header in the header of through hole and described the second intermediate layer by separately and correspondingOpening is interconnected; Described tube connector strides across described the first intermediate layer and the second intermediate layer, by describedTwo outer field headers and a described first outer field header are interconnected.
10. a using method for Multi-layer exchanging heat device, wherein said Multi-layer exchanging heat device comprise refrigerant inlet,Refrigerant outlet and multiple layer for cold-producing medium circulation, each described layer comprise header and multiple and described inThe flat tube that header is communicated with, is provided with fin between adjacent flat tube in same layer; Described multiple layer comprisesThe first skin, the second skin and intermediate layer, the relative both sides of described Multi-layer exchanging heat device are respectively describedOne outer and described the second skin, described intermediate layer is arranged between described the first skin and the second skin;Described refrigerant inlet is communicated with the header in described intermediate layer, outside described refrigerant outlet and described firstThe header of layer is communicated with, and described intermediate layer is outer and the described first outer connection via described second; Its spyLevy and be, said method comprising the steps of:
Described Multi-layer exchanging heat device is used for to refrigeration system as evaporimeter, by described refrigerant inlet and systemThe throttle part of cooling system connects, and described refrigerant outlet is connected with reservoir or the compressor of refrigeration system,Described the first skin is towards the air intake direction of refrigeration system, and described the second skin is towards the air-out of refrigeration systemDirection;
Cold-producing medium in fluid state is inputted from described refrigerant inlet, made described cold-producing medium flow through instituteAfter stating multiple layers, flow out from described refrigerant outlet;
Need to be blown into described Multi-layer exchanging heat device from described the first skin by the cooling air-flow of refrigeration system, makeDescribed air flow stream blows out from described the second skin after crossing described intermediate layer, and is flowing through described flat tube and finTime by described flat tube and fin and described cold-producing medium heat-shift.
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Application publication date: 20160518 |