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Heat exchanger

A technology of heat exchangers and outer tubes, applied in the field of heat exchangers, can solve the problems of high material costs, large-scale heat exchangers, and thicker thicknesses, etc., and achieve heat exchange area expansion, miniaturization, and high-efficiency heat transfer. The effect of the exchange

Inactive Publication Date: 2012-08-29
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In the sleeve-and-tube heat exchanger of a cooling and heating device using carbon dioxide refrigerant as a high-pressure refrigerant, there is a pressure-resistant problem of the inner pipe as a high-pressure pipe. The refrigerant circulates inside and outside the casing to exchange heat, and the thickness of the inner and outer pipes needs to be thickened, resulting in problems of larger heat exchangers and higher material costs.

Method used

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Embodiment approach 1

[0074] image 3 It is a figure which shows the internal heat exchanger 14 which concerns on Embodiment 1 of this invention, (a) is a perspective view, (b) is the cross-sectional view of the tube structure.

[0075] Internal heat exchanger 14 as image 3 (b) shows a structure in which a multi-leaf tube 32 is arranged in the same direction as the outer tube 31 in a cylindrical outer tube 31, wherein the tube walls of the multi-leaf tube 32 are alternately formed in multiple layers in the circumferential direction. A convex portion (mountain portion) 32a and a concave portion (valley portion) 32b, the outer surface of the convex portion 32a top is in close contact with the inner surface of the outer tube 31, and the outer surface of the cylindrical inner tube 33 is in contact with the inner surface of the concave portion 32b top. snugly, constructing the tube thus constituted as image 3 (a) shows the formation as a helix.

[0076] Furthermore, by connecting the inner pipe 33 ...

Embodiment approach 2

[0084] Next refer to Figure 4 A heat exchanger according to Embodiment 2 of the present invention will be described. Figure 4 It is a figure which shows the internal heat exchanger 14, (a) is a perspective view, and (b) is a cross-sectional view of the tube structure. In addition, the same code|symbol is used for the same structure as Embodiment 1. As shown in FIG.

[0085] In Embodiment 1, there is a structure including a cylindrical outer tube 31, and inside the outer tube 31, a multi-leaf tube 32 is arranged in the same direction as the outer tube 31. A plurality of convex parts 32a and concave parts 32b are formed alternately, the outer surface of the top of the convex part 32a of the multileaf tube 32 is in close contact with the inner surface of the outer tube 31, and the outer surface of the cylindrical inner tube 33 is in contact with the top of the concave part 32b. The inner surface is in close contact, so that the high-temperature and high-pressure refrigerant (...

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Abstract

The invention provides a heat exchanger, which has low cost and can conduct heat exchange with good efficiency. An internal heat exchanger (14) has the configuration as follows: a multi-leaf pipe (32) having a plurality of protruding parts (32a) and recessed parts (32b) staggerly arranged in a circumferential direction of a pipe wall is arranged in a cylindrical outer pipe (31) along the same direction as the outer pipe. The outer surface of the top part of the protruding part (32a) appresses tightly against the inner surface of the outer pipe (31), and the outer surface of a cylindrical inner pipe (33) appresses tightly against the inner surface of the top part of the recessed part (32b). The inner pipe (33) is connected to connection pipes (14a, 14b), and a flowing path formed in the inner pipe (33) is used as a high pressure side tubing (141) of the internal heat exchanger (14). Connection pipes (14c, 14d) are connected to a flow path formed between the inner pipe (33) and the outer pipe (31), and the flow path formed between the inner pipe (33) and the outer pipe (31) is used as a low pressure tubing (142) of the internal heat exchanger (14).

Description

technical field [0001] The present invention relates to a heat exchanger for an automatic vending machine constituting a refrigeration cycle, a heat pump cycle, and the like. Background technique [0002] In the prior art, for example, in an automatic vending machine for selling products such as canned beverages and PET bottled beverages, a cooling and heating device for cooling or heating products stored in a product storage warehouse for sale is included, wherein, The main cabinet room, which is the main body of the vending machine, is surrounded by heat insulating material. [0003] The cooling and heating device is configured by installing a compressor, an external heat exchanger, an expansion mechanism, and an internal heat exchanger in the machine room, and installing an evaporator in the commodity storage, and connecting each device through refrigerant piping. According to the operation mode of cooling and heating, the cooling and heating device configured in this wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/00F28F1/10G07F13/10
Inventor 山上雄平石野裕二玉置泰三
Owner FUJI ELECTRIC CO LTD