Gas-liquid heat-exchange
Technical field
The utility model relates to a kind of heat exchanger, relates in particular to a kind of gas-liquid heat-exchange.
Background technology
At present, in the wind-power electricity generation product, often adopt gas liquid exchanger to carry out the heat exchange of rack inner air, heat exchanger is usually located at rack outside (being called wall-hanging) or rack inside (being called the top set formula).Compare with simple forced air cooling heat exchange scheme, use the heat exchange of gas liquid exchanger to air in the rack, heat exchange efficiency is higher, and rack can accomplish to seal fully, reaches the IP55 grade.Gas-liquid type heat exchanger in the at present domestic and international wind energy converter all adopts expand tube formula technological forming, and liquid line is the copper pipe of coiling, because pipeline is full the series connection, flow resistance is bigger; Have the outside expansion tube process that adopts of some products to put on fin, but owing to exist thermal contact resistance between fin and the liquid line, heat transfer efficiency is lower, thereby causes heat exchanger volume bigger with enhance heat.
In addition, portioned product is set in 10 ℃ to 15 ℃ in order to remedy the lower shortcoming of heat exchanger efficiency with the water inlet temperature, is lower than environment temperature, therefore the cooling fluid feed system that this has chilled water or add an air conditioner refrigerating in addition with regard to the application scenario that needs heat exchanger has limited its application scenario.
The utility model content
The technical problems to be solved in the utility model is that the cascaded structure at coil heat exchanger in the prior art has caused the problem that flow resistance is big, heat transfer efficiency is low, and a kind of heat exchange efficiency height, simple in structure, gas-liquid heat-exchange that flow resistance is little are provided.
The utility model solves above-mentioned technical problem by the following technical programs: a kind of gas-liquid heat-exchange, comprise shell, water inlet pipe, outlet pipe, external fan, be provided with the flat box heat exchanger fin that one deck at least has hollow duct in the shell, box heat exchanger fin two ends connect water inlet pipe, outlet pipe respectively, the hollow duct of box heat exchanger fin and water inlet pipe and outlet pipe UNICOM.
At least two-layer box heat exchanger fin is set in the shell at interval, and the hollow duct of box heat exchanger fin is a flat flow channel, the water inlet end of box heat exchanger fin and water inlet pipe UNICOM, the water side of box heat exchanger fin and outlet pipe UNICOM.
Be provided with equal water mechanism between water inlet pipe outlet and all box heat exchanger fin water inlet end, be provided with simultaneously the water cavity with all box heat exchanger fin UNICOMs in the described equal water mechanism, water cavity also exports UNICOM with water inlet pipe.
Described equal water mechanism is provided with cloth stream plate in water cavity one side, the water inlet end of all box heat exchanger fins and cloth stream plate are fixed together, evenly be placed with the inlet opening at interval on the cloth stream plate, described inlet opening respectively with different box heat exchanger fin hollow duct UNICOM, evenly supply water to all box heat exchanger fins.
Be arranged in parallel between the adjacent box heat exchanger fin.
Box heat exchanger fin lateral wall is provided with the fin that is connected with box heat exchanger fin.
At least the fin that one deck is connected with box heat exchanger fin is set between two-layer box heat exchanger fin.
Described fin undulate, its size cooperates consistent with box heat exchanger fin.
The two-layer fin that is connected with box heat exchanger fin separately respectively is set between the two-layer box heat exchanger fin, the thin plate that one deck is used for Homogeneouslly-radiating is set between two-layer fin, described thin plate is fitted with two-layer fin and is fixedlyed connected.
Be provided with between outlet pipe import and all box heat exchanger fin water side and be used for box heat exchanger fin is flowed out the header box that water confluxes, header box is connected with the outlet pipe import.
The utility model adopts the flat box heat exchanger fin of one deck at least, be provided with the runner of hollow in the box heat exchanger fin, the external surface area of flat box heat exchanger fin is big, compare with copper pipe, increase a lot of effective heat exchange areas, under the equal air quantity, its heat exchange efficiency is far longer than coil heat exchanger, and the heat exchange property of rack water cooling heat exchanger is greatly improved.Since the raising of heat exchanger efficiency, under the situation of equal exchange heat, the more traditional expand tube formula of the utility model gas-liquid heat-exchange, its volume can dwindle 30-40%.
Heat exchanger of the present utility model is provided with two-layer box heat exchanger fin at least, has increased the area that heat exchanger fin contacts with air, makes heat exchange very abundant, the heat exchange efficiency height.
In order to guarantee to enter the discharge equilibrium of different box heat exchanger fins, be provided with equal water mechanism in the end of all box heat exchanger fins, all water cavity one side of water mechanism is provided with cloth stream plate, evenly be placed with the inlet opening at interval on the cloth stream plate, described inlet opening respectively with different box heat exchanger fin hollow duct UNICOM, evenly supply water to all box heat exchanger fins, avoided water to be introduced into some box heat exchanger fin, and other box heat exchanger fins do not have water or the water yield less, the inadequate problem of the heat exchange that causes.
In the middle of per two runners, can also increase one or more layers wavy fin, increase the heat exchange area of air and heat exchanger as far as possible.The two-layer fin that is connected with box heat exchanger fin separately respectively is set between the two-layer box heat exchanger fin, the thin plate that one deck is used for Homogeneouslly-radiating is set between two-layer fin, thin plate is fitted with two-layer fin simultaneously and is fixedlyed connected, and uneven heat on two fins is evenly distributed.
The exchange capability of heat of gas-liquid type heat exchanger strengthens greatly, and the temperature of influent side cooling fluid is not strict with, and can be applicable in the higher ambient temperature, has cancelled the restriction to use occasion.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the gas-liquid heat-exchange sectional side elevation of the utility model embodiment;
Fig. 3 is the cross-sectional figure of the gas-liquid heat-exchange of the utility model embodiment;
Fig. 4 is the sectional side elevation at equal water mechanism place of the utility model embodiment.
The specific embodiment
As shown in Figure 1, 2, 3, a kind of gas-liquid heat-exchange, comprise shell 1, water inlet pipe 5, outlet pipe 7, external fan (not shown), be provided with the flat box heat exchanger fin 2 that one deck at least has hollow duct 21 in the shell 1, box heat exchanger fin 2 two ends connect water inlet pipe 5, outlet pipe 7 respectively, and every five layers of box heat exchanger fin 2 are set, the hollow duct 21 of box heat exchanger fin 2 is a flat flow channel to present embodiment between the upper and lower, one end and water inlet pipe 5 UNICOMs, the other end and outlet pipe 7 UNICOMs.The quantity of the box heat exchanger fin of the utility model is provided with according to actual heat exchange needs, in order to reach the heat exchange purpose, two-layer above box heat exchanger fin 2 will be set generally.Leave spacing between the adjacent two-layer box heat exchanger fin 2 and be arranged in parallel.Be provided with between 7 mouthfuls of outlet pipes and all box heat exchanger fin 5 water sides and be used for box heat exchanger fin is flowed out the header box 6 that water confluxes, header box 6 is connected with outlet pipe 7 imports.
Shown in Fig. 2,3, between water inlet pipe 5 outlet and all box heat exchanger fin 2 water inlet ends, be provided with equal water mechanism 3, be provided with simultaneously the water cavity 33 with all box heat exchanger fin UNICOMs in the described equal water mechanism, water cavity 33 also exports UNICOMs with water inlet pipe 5.Described equal water mechanism is provided with cloth stream plate 31 in water cavity 33 1 sides, and the water inlet end of all box heat exchanger fins 2 flows plate 31 with cloth and is fixed together.
As shown in Figure 4, evenly be placed with inlet opening 32 on the cloth stream plate 31 at interval, described inlet opening 32 respectively with different box heat exchanger fin 2 hollow duct UNICOMs, evenly supply water to all box heat exchanger fins 2.The equal water mechanism 3 of present embodiment is a body structure, be rectangular-shaped, cloth stream plate 31 be a side plate of casing, and box heat exchanger fin 2 is arranged from top to bottom and fixedlyed connected with cloth stream plate 31, and the hollow duct 21 of box heat exchanger fin 2 and cloth flow the inlet opening 32 corresponding UNICOMs on the plate 31.
As shown in Figure 1, box heat exchanger fin 2 lateral walls are provided with the fin 22 that is connected with box heat exchanger fin 2.At least the fin that one deck is connected with box heat exchanger fin is set between two-layer box heat exchanger fin 2.Every layer of box heat exchanger fin of present embodiment all is connected with fin 22, described fin 22 undulates, and its size cooperates consistent with box heat exchanger fin 2.Between adjacent two-layer fin 22, one deck thin plate 23 is set, be used for Homogeneouslly-radiating, thin plate 23 is fitted with two-layer fin 22 and is fixedlyed connected, and the fixing mode of fitting can be welding, also can adopt a lot of modes such as heat-conducting glue is bonding, and present embodiment adopts welding manner.Fin 22 and thin plate 23 can be provided with also and can not be provided with.
The utility model gas-liquid heat-exchange adopts aluminum material by the vacuum brazing moulding, and the aluminum material heat-transfer effect is good, the heat exchange efficiency height, and water inlet pipe 5, outlet pipe 7 positions of heat exchanger also can be provided with flexibly simultaneously, are convenient to the draining of gas liquid type heat exchanger; Water inlet pipe 5 is arranged on the bottom of water compensation mechanism in the present embodiment, and outlet pipe is arranged on the top of header box 6, is provided with like this to be beneficial to water and evenly to enter all box heat exchanger fins 2, reaches the purpose of abundant heat exchange.Also can increase the exhaust outlet of gas liquid type heat exchanger simultaneously easily on the top of rising pipe side header box 6, be convenient to the exhaust of system.
The utility model be installed in the rack or rack outside, under the effect of external fan, thermal air current carries out heat exchange through box heat exchanger fin with the box heat exchanger fin surface that temperature is lower, hot-air with heat absorbed by box heat exchanger fin, become the lower air of temperature and blow out.