CN108826761A - A kind of heat exchanger tube - Google Patents

Abstract

The invention discloses a kind of heat exchanger tubes, including body portion, constitute the shell for making the flow channel of media flow, and corrugated inner fins, for separating flow channel, it is the flat tube for being soldered to inner surface of tube body at the top of the inner fins, heat exchange is carried out with the heat for being transmitted to pipe in top medium, wherein, brazing material needed for being brazed the top of inner fins and the inner surface of the body portion is not coated on the first material for constituting the first material, the body portion but cladding constitute the second material of inner fin, the equivalent diameter of the flow channel separated by inner fin is 0.559mm or smaller.In furnace brazing, the brazing material being arranged in flow channel melts the present invention earlier than the brazing material being penetrated into flow channel from outside, so that flow channel be prevented to be blocked.

Description

A kind of heat exchanger tube

Technical field

The present invention relates to a kind of heat exchanger tubes, wherein the medium for flowing through its channel carries out hot friendship with the heat for being transmitted to pipe It changes.

Background technique

For the heat exchanger of refrigeration cycle, such as radiator, evaporator, it is known that it is handed over by being alternately stacked flat heat Parallel operation pipe and corrugated fins fin configure to form core and manage the connecting pin with tank.Refrigerant is brought to from a container In heat exchanger, heat exchanger tube is flowed through, while carrying out heat exchange with the heat for being transmitted to core, and from another discharge of tank. This heat exchanger is by the way that the components such as heat exchanger tube, fin, tank are assembled integrally and in furnace brazing assembly And generate.In recent years, in order to improve the performance of heat exchanger, Tube Sheet of Heat Exchanger tends to be compact and accurate, in order to improve performance and life Yield, the size setting of all parts, the arrangement etc. of brazing material become more and more important condition.

Technical solution

The invention mainly solves the technical problem of providing a kind of heat exchanger tubes, which is characterized in that including：Tube body Point, constitute the shell and corrugated inner fins for making the flow channel of media flow, for separating flow channel, institute Stating is the flat tube for being soldered to inner surface of tube body at the top of inner fins, carries out heat with the heat for being transmitted to pipe in top medium Exchange, wherein brazing material needed for being brazed the top of inner fins and the inner surface of body portion is not coated to composition the On first material of one material, the second material of the body portion but cladding composition inner fin.

Optionally, the thickness of the clad of the brazing material in the second material is relative to the second material with a thickness of 5- 10%.

Optionally, wherein the second material with a thickness of 0.1 millimeter or smaller.

Optionally, wherein the second material has 0.05 to 0.07 millimeter of thickness.

Optionally, wherein the first material has 0.25 millimeter or smaller thickness.

The beneficial effects of the invention are as follows：

For the present invention in furnace brazing, the brazing material ratio being arranged in flow channel is penetrated into flow channel from outside In brazing material melt earlier, thus prevent flow channel be blocked.

Detailed description of the invention

Fig. 1 is the explanatory diagram for showing heat exchanger according to an embodiment of the present invention.

Fig. 2 is the explanatory diagram and enlarged view for the part that the part of heat exchanger tube is shown before its soldering.

Embodiment

The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.

Heat exchanger 1 shown in FIG. 1 is the radiator of the refrigeration cycle of the interior air-conditioning for being mounted on automobile, the heat Exchanger 1 includes the core 10 formed and being alternately stacked heat exchanger tube 100 and cooling fin 20, and a pair of of container 30, In each heat exchanger tube 100 both ends along its vertical communication.Reinforcer 40 is separately positioned on two sides up and down of core 10 On, the both ends of each reinforcer 40 are supported by slot 30 in a longitudinal direction thereof.Medium (that is, the refrigerant recycled by refrigeration cycle) Entrance 31 and outlet 32 are arranged on the required part of tank 30, so that being flowed in heat exchanger tube 100 by the medium that entrance 31 enters Overheat outlet is thermally conducted to core 10 and passes through 32 outflow of outlet.Constitute the component of heat exchanger 1, such as fin 20, tank 30, entrance 31, outlet 32, side plate 40 and heat exchanger tube 100 are formed by aluminum or aluminum alloy component, they assemble integral, group by fixture Dress body is heat-treated in furnace, and soldering is integral.It is brazed in furnace, brazing material and solder flux are arranged on each component Required part on.

The heat exchanger tube 100 of the present embodiment shown in Fig. 2 has body portion 200, which forms flowing and be situated between The shell of matter 101 is used for flow media and ripple inner fin 300, is used for flow manifold 101, and the top of inner fin 300 is flat simultaneously It is soldered to inner surface.Heat exchanger tube 100 with a thickness of 1.2 millimeters or smaller, it is generally desirable to, the thickness of heat exchanger tube 100 It is 0.8-1.2 millimeters, also, heat exchanger tube 100 has 16 millimeters or smaller width, the width of heat exchanger tube 100 is 12-16 millimeters are ideal.In addition, each runner 101 is separated by inner fin 200, each inner fin is with equivalent diameter 0.559 millimeter or smaller diameter, flow channel 101 are ideal with 0.254 millimeter to 0.559 millimeter of equivalent diameter. The equation for obtaining equivalent diameter is DE=4 × (cross section of fluid channel product)/(total length on the wet side of cross section of fluid channel), medium be transmitted to The heat of heat exchanger tube 100 carries out heat exchange, and body portion 200 is formed by the first material of aluminum or aluminum alloy strip , the both ends 201 of the first material in the width direction are mutual in the width direction in one end of heat exchanger tube 100 102 Engagement and soldering, so that they are not separated each other, also, the other end 103 of heat exchanger tube 100 is base in the width direction The center of this upper first material is by curved part.Inner fin 300 is second of material roll bending formation by aluminum or aluminum alloy band Made of, the spacing P between inner fin top is 1 millimeter or smaller, and inner fin 300 is molding suitable in the roller of body portion 200 When the stage is inserted between the first material and is arranged in body portion 200.Specifically, in 310 He of the top of inner fin 300 In the case where the inner surface soldering of body portion 200, at least one of the first material and the second material are coated with brazing material, And the structure that the second material is only coated with brazing material, reason for this is that the uses of inhibition brazing material to the smallest need It measures.Firstly, siliceous solder is the indispensable material of soldering, but can become the reason of core material corrodes after being brazed, therefore, it is intended that Brazing material is suppressed to quantity as small as possible, also, by the way that core material and brazing material are stacked and wound with defined ratio Come produce with brazing material cladding material so that the thickness of the clad of brazing material relative to material thickness have it is lower The limit.According to the prior art, the lower limit of coating thickness is about the 5% of material thickness, in addition, in the thickness for comparing the first material In the case where the thickness T2 for spending T1 and the second material, in view of the structure of heat exchanger tube 100, the thickness T2 of the second material can be It is thinning to a certain extent.As a result, only the second material is ideally coated with brazing material, brazing material is determined as on a small quantity, Meanwhile first material end and brazing material be brazed, brazing material by it is above-mentioned act in soldering oven by capillary work It is penetrated into from tank 30.According to this structure, it is possible to reduce the quantity of used brazing material, and can reduce the first material Silicon diffusion layer depth, so as to so that the thickness of the first material is thinning.In order to improve inner fin 300 to body portion 200 Support strength and inner fin 300 durability, the end 301 of the second material in the width direction is soldered to the first material On, brazing material is coated on the second material.The end 301 of second material and the soldering of the first material prevent the second material End 301 fluctuated by flow media, and the stability of the durability of heat exchanger tube 100 and medium flow field can be by for certain It improves.The thickness T1 of first material is 0.25 millimeter or smaller, the thickness T1 of the first material be 0.18-0.24mm be it is ideal, Also, sacrificial layer is set by AZ-Zn alloy-layer, to improve corrosion resistance of the heat exchanger tube 100 on the first material surface, First material becomes the shell of heat exchanger tube 100.

The sequencing of above embodiments is not only for ease of description, represent the advantages or disadvantages of the embodiments.

Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features； And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and Range.

Claims (5)

1. a kind of heat exchanger tube, which is characterized in that including：Body portion constitutes the flow channel for making media flow Shell and corrugated inner fins are to be soldered to inner surface of tube body at the top of the inner fins for separating flow channel Flat tube, carry out heat exchange with the heat for being transmitted to pipe in top medium, wherein be brazed the top of inner fins and described Brazing material needed for the inner surface of body portion is not coated on the first material for constituting the first material, the body portion But cladding constitutes the second material of inner fin.

2. a kind of heat exchanger tube according to claim 1, it is characterised in that：The cladding of brazing material in second material The thickness of layer is relative to the second material with a thickness of 5-10%.

3. a kind of heat exchanger tube according to claim 1, it is characterised in that：Wherein the second material with a thickness of 0.1 milli Rice is smaller.

4. a kind of heat exchanger tube according to claim 3, it is characterised in that：Wherein the second material has 0.05 to 0.07 The thickness of millimeter.

5. a kind of heat exchanger tube according to claim 1, it is characterised in that：Wherein the first material have 0.25 millimeter or Smaller thickness.