JPH0684176U - Plate fin type heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a plate fin type heat exchanger that is compact and lightweight by optimizing the plates that form the passages. [Structure] Heat exchange between two fluids having different fluid pressures is performed. In the high-pressure fluid passage 1, thick plates 2 and 2 having a thickness selected according to the fluid pressure and a narrow pitch fin 3 are used. A thin plate 5 and a wide pitch fin 6 are used for the low-pressure fluid passage 4, a side bar 7 is arranged at a required portion, these are laminated, and integrally brazed and assembled. [Effect] Stacking size and weight can be reduced,
In particular, when the plate material is aluminum or stainless steel, or when both materials are combined depending on the fluid, a remarkable size and weight reduction effect can be obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a plate fin type heat exchanger, and relates to a plate fin type heat exchanger in which the plate thickness is selected according to the fluid pressure in a passage to reduce the size and weight.

[0002]

[Prior art]

 In the plate fin type heat exchanger, for example, a required number of corrugated fins and plates are alternately laminated, a side bar is interposed at a required end between the plates, and they are integrated by brazing, and the fins are sandwiched between the plates. It consists of a number of stacked passages that are closed by side bars. Due to its small size and excellent heat exchange efficiency, it is used in heat exchangers for various purposes.

[0003]

[Problems to be solved by the device]

 Conventionally, in plate fin type heat exchangers, the plate thickness of the plates is selected to withstand the highest fluid pressure of the multiple fluids to be heat-exchanged, and the thick plates for this high-pressure fluid are used for all the laminated plates. I was assembling it. Therefore, even if the number of high-pressure fluid passages is small relative to the total number of passages, since thick plates are all used, the stacking dimension is large and heavy.

The present invention is a plate fin type heat exchanger in which a plurality of fluids to be heat-exchanged have different fluid pressures, and the plates forming the passages are optimized to reduce the size and weight of the plate fin type heat exchanger. The purpose is to provide.

[0005]

[Means for Solving the Problems]

 This invention is a plate fin type heat exchanger in which multiple fins are sandwiched between plates and closed by side bars, and the plate thickness is selected according to the fluid pressure of the passage and the fluid pressure of the adjacent passage. However, the plate fin type heat exchanger is characterized in that plates having different plate thicknesses are used in the same heat exchanger.

[0006]

[Action]

 This invention uses a thick plate only for the high-pressure fluid passage and a plate with a thickness selected according to the fluid pressure of other passages when the fluid pressures of the multiple fluids to be heat-exchanged differ. For example, when the fluid pressures of the three fluids are different, two or three types of plates having different plate thicknesses are arranged at the fluid passage positions and laminated according to the pressures. As compared with the case where a thick plate for high-pressure fluid is used for forming all the passages, the thickness of the plates forming the passages can be optimized, and the stacking dimension and weight can be reduced.

[0007]

【Example】

Example 1 The plate fin type heat exchanger shown in FIG. 1 performs heat exchange between two fluids having different fluid pressures. The high pressure fluid passage 1 has a thick wall plate whose plate thickness is selected according to the fluid pressure. 2 and the narrow pitch fin 3 are used, the thin plate 5 and the wide pitch fin 6 are used for the other low-pressure fluid passages 4, and the side bar 7 is arranged at a required portion and these are laminated to be integrated. It is assembled and attached. As shown, low pressure, high pressure, low pressure, low pressure, high pressure, low pressure, low pressure, high pressure, and low pressure are laminated in this order. Conventionally, all 10 plates are thick plates, but only 6 plates in this invention. A thick plate may be used. For example, the plate pressure is 1.6 mm when the design pressure of the high pressure fluid passage 1 is 50 kg / cm ² g and the plate pressure is 1 mm when the design pressure of the low pressure fluid passage 4 is 5 kg / cm ² g. In this case, the stacking height is 2.4 mm and the weight is 2.4 mm, which is reduced by one plate.

Example 2 Further, when assembling a plate fin type heat exchanger for exchanging heat of three fluids having different fluid pressures in four passages from an aluminum material, if the passages A to D are arranged in the stacking order, A passage design pressure 20 kg / cm ² g Plate thickness 1.2 mm (a) B passage Design pressure 5 kg / cm ² g Plate thickness 1 mm (b) C passage Design pressure 5 kg / cm ² g Plate thickness 1 mm (b) D passage Design pressure 50 kg / cm ² g Plate plate thickness 1.6 mm (c) In the design, the plate thickness is a, a, b, c, c in the stacking order, and the stacking height is 1.4 mm compared to the conventional case where c is used. , The weight is reduced by one plate having a thickness of 1.4 mm, and in the case of a heat exchanger in which a plurality of units are stacked with A to D passages as one unit, the stacking height and weight should be further reduced. become.

[0009]

[Effect of device]

 This invention, as shown in the embodiment, can optimize the thickness of the plates forming the passages in a plate fin type heat exchanger that performs heat exchange of a plurality of fluids having different fluid pressures, and can reduce the stacking dimension and weight. It can be reduced, and in particular, when the plate material is aluminum or stainless steel, or when both materials are combined depending on the fluid, a remarkable size and weight reduction effect can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view showing a configuration of a plate fin type heat exchanger according to the present invention.

[Explanation of symbols]

 1 High Pressure Fluid Passage 2 Thick Wall Plate 3 Narrow Pitch Fin 4 Low Pressure Fluid Passage 5 Thin Plate 6 Wide Pitch Fin 7 Sidebar

Claims (1)

[Scope of utility model registration request] 1. A plate fin type heat exchanger in which a plurality of passages having fins sandwiched between plates and the periphery of which is closed by a side bar are laminated, and the plate thickness is changed according to the fluid pressure of the passages and the fluid pressure of the adjacent passages. A plate fin type heat exchanger characterized in that selected plates having different plate thicknesses are used in the same heat exchanger.