Heat exchanger and refrigeration cycle device

a technology of heat exchanger and refrigeration cycle, which is applied in the direction of indirect heat exchanger, light and heating apparatus, refrigeration components, etc., can solve the problems of large pressure loss, reduced operation efficiency of refrigeration cycle, and increased pressure loss inside the heat transfer pipe, so as to reduce the occurrence of fin buckling

Inactive Publication Date: 2019-03-07
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This design effectively reduces fin buckling occurrences, enhancing the heat exchanger's efficiency and manufacturability by minimizing contact and heat loss between rows during bending.

Problems solved by technology

Therefore, when the heat exchanger is formed with the number of passes equal to that in a mode in which the heat transfer pipe being a normal circular pipe is used, a pressure loss inside the heat transfer pipe is increased to lower operation efficiency of a refrigeration cycle.
Thus, the pressure loss is large, and the amount of heat exchange with air is small.

Method used

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  • Heat exchanger and refrigeration cycle device
  • Heat exchanger and refrigeration cycle device
  • Heat exchanger and refrigeration cycle device

Examples

Experimental program
Comparison scheme
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first embodiment

[0019]FIG. 1 is a view for illustrating a configuration of a refrigeration cycle apparatus according to a first embodiment of the present invention. A refrigeration cycle apparatus 1 includes a circuit 3 through which a refrigerant circulates. The circuit 3 includes at least a compressor 5, an outdoor heat exchanger 100, an expansion unit 7, and an indoor heat exchanger 9.

[0020]The refrigeration cycle apparatus 1 can perform both a heating operation and a cooling operation, that is, a defrosting operation. The circuit 3 includes a four-way valve 11 configured to perform switching between the operations. Further, in FIG. 1, flow of the refrigerant during the cooling operation, that is, the defrosting operation is indicated by the dotted line arrows, and flow of the refrigerant during the heating operation is indicated by the solid line arrows.

[0021]The components of the circuit 3 are described based on a direction of the flow of the refrigerant during the cooling operation as a refer...

second embodiment

[0043]Next, with reference to FIG. 5 and FIG. 6, a second embodiment of the present invention is described. FIG. 5 is a plan view for illustrating a first bending mode of the second embodiment. FIG. 6 is a plan view for illustrating a second bending mode of the second embodiment. The second embodiment is similar to the above-mentioned first embodiment except for description given below.

[0044]In a first mode of the second embodiment, as illustrated in FIG. 5, only a leeward row (second row) 202 being the second heat exchange unit is bent, and a windward row (first row) 201 being the first heat exchange unit is not bent. Specifically, the leeward row 202 includes a leeward curved portion 202a, whereas the windward row 201 does not include a curved portion, specifically, extends straight in plan view.

[0045]Further, in a second mode of the second embodiment, as illustrated in FIG. 6, only the leeward row (second row) 202 is bent, whereas the windward row (first row) 201 is not bent. Spe...

third embodiment

[0051]Next, with reference to FIG. 7, a third embodiment of the present invention is described. FIG. 7 is a plan view for illustrating characteristics of a heat exchanger according to the third embodiment of the present invention. The third embodiment is similar to the above-mentioned first embodiment except for description given below.

[0052]The third embodiment has a characteristic in that, as illustrated in FIG. 7, a length over which a windward row 301 being the first heat exchange unit extends is shorter than a length over which a leeward row 302 being the second heat exchange unit extends. In other words, the first heat exchange unit has a first planar portion opposed to the first side surface 18, which is one of the two side surfaces 18 and 19 of the casing 17, and the second heat exchange unit has a second planar portion opposed to the first side surface 18. A length (horizontal length) over which the first planar portion extends is shorter than a length (horizontal length) o...

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Abstract

In a heat exchanger, a first heat exchange unit is formed by curving a third heat exchange unit having a planar shape through L-shape bending, and a second heat exchange unit is formed by curving a fourth heat exchange unit having a planar shape through the L-shape bending, independently of the third heat exchange unit. The first heat exchange unit and the second heat exchange unit are arranged so as to be opposed to each other along a corner portion between adjacent two side surfaces of a casing.

Description

TECHNICAL FIELD[0001]The present invention relates to a heat exchanger and a refrigeration cycle apparatus.BACKGROUND ART[0002]As a heat exchanger constructing a refrigeration cycle apparatus, there exists a heat exchanger including a heat transfer pipe having a circular shape. A diameter of the heat transfer pipe is progressively reduced for the purpose of achieving higher performance of the heat exchanger. In recent years, there even exists a heat exchanger including a flat perforated pipe used as the heat transfer pipe.[0003]When a small-diameter circular pipe, for example, having a diameter of 4 mm or the like, or a flat perforated pipe is used as the heat transfer pipe, a flow passage sectional area of the small-diameter circular pipe or the flat perforated pipe is smaller than a flow passage sectional area of a normal circular pipe. Therefore, when the heat exchanger is formed with the number of passes equal to that in a mode in which the heat transfer pipe being a normal circ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F28D1/047F28F13/06F28F9/26F28F1/32F25B47/02F28F1/02F28D1/04F28D21/00
CPCF28D2021/0068F28D1/0471F28D1/0417F28F9/262F28D1/047F28F1/32F28F13/06F28F1/02F25B47/025
InventorNAKAMURA, SHINMAEYAMA, HIDEAKIISHIBASHI, AKIRAHIGASHIIUE, SHINYAITO, DAISUKEMATSUI, SHIGEYOSHIUGAJIN, YUKI
OwnerMITSUBISHI ELECTRIC CORP