Unlock instant, AI-driven research and patent intelligence for your innovation.

Heat exchanger and heat exchange method

a heat exchanger and heat exchange technology, applied in indirect heat exchangers, heating types, lighting and heating apparatus, etc., can solve the problems of increasing the cost, increasing the size of the apparatus, and difficulty in equal distribution of refrigerant to the plurality of flat pipes, so as to suppress the reduction of heat exchange performance

Inactive Publication Date: 2015-03-26
MITSUBISHI ELECTRIC CORP
View PDF12 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes how the invention prevents the refrigerant from getting affected by gravity, which can lower its performance. This is achieved by using multiple heat exchange function surface units. The technical effect is reduced impact of gravity on refrigerant and improved heat exchange performance of each surface.

Problems solved by technology

In this parallel flow type heat exchanger, when the pair of header pipes is arranged in a vertical up-and-down direction, due to an influence of the gravity, liquid refrigerant in gas-liquid two phase refrigerant is liable to flow into flat pipes positioned on a relatively lower side, thereby being difficult to equally distribute the refrigerant to the plurality of flat pipes.
However, when the header pipe is curved into, for example, an L-shape or a U-shape, significant loads are applied, and hence there arise problems in that the apparatus is upsized and cost is increased.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat exchanger and heat exchange method
  • Heat exchanger and heat exchange method
  • Heat exchanger and heat exchange method

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0021]FIG. 1 is a view illustrating a structure of a heat exchanger according to a first embodiment of the present invention. The heat exchanger of this embodiment functions as an outdoor unit of an air conditioner that is installed in a space of intended use, and carries out heating and cooling. Therefore, the heat exchanger is a parallel flow type heat exchanger in which when the heat exchanger operates as a condenser in a phase of the cooling, refrigerant flows from the top to the bottom as indicated by dotted line arrows in FIG. 1, and when the heat exchanger operates as an evaporator in a phase of the heating, the refrigerant flows from the bottom to the top as indicated by solid line arrows in FIG. 1.

[0022]A heat exchanger 1 has a plurality of heat exchange function surface units 3. Note that, FIG. 1 illustrates an example in which three heat exchange function surface units 3 are provided. In addition, in the example of FIG. 1, the adjacent heat exchange function surface units...

second embodiment

[0041]A description is made of a second embodiment of the present invention with reference to FIG. 6. The first embodiment described above exemplifies such a mode that the refrigerant dryness is equally adjusted for the plurality of heat exchange function surface units, and the refrigerant flow rate is changed depending on the heat loads (mainly depend on the passing air velocity in the heat exchange section), which are different from one another in the heat exchange function surface units. However, the present invention is not limited to that mode. That is, the present invention also encompasses such a mode that the refrigerant drynesses and / or the refrigerant flow rates are adjusted so as to be different from one another in the plurality of heat exchange function surface units. As a specific application example, an application to a package air conditioner outdoor unit is given. FIG. 6 illustrates an external appearance and plan view of the application to the package air conditione...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A heat exchanger has a plurality of heat exchange function surface units, capable of suppressing an influence of the gravity exerted on refrigerant and suppressing reduction of heat exchange performance in each of the surfaces. The heat exchanger has the plurality of heat exchange function surface units, and includes an upper header pipe, a lower header pipe, and a plurality of heat exchange pipes provided between the pair of upper and lower header pipes in each of the heat exchange function surface units. The plurality of heat exchange function surface units have a parallel connection relationship, and a plurality of the lower header pipes are connected to a lower collection pipe through a branch current adjusting section.

Description

TECHNICAL FIELD[0001]The present invention relates to a heat exchanger and a heat exchange method.BACKGROUND ART[0002]As one type of the heat exchanger, a parallel flow type heat exchanger is given. This heat exchanger includes a pair of header pipes, and a plurality of flat pipes provided between those header pipes. This heat exchanger is configured so that after a fluid, which has flowed into one of the headers, flows through the plurality of flat pipes, the fluid flows out to the other of the header pipes.[0003]In this parallel flow type heat exchanger, when the pair of header pipes is arranged in a vertical up-and-down direction, due to an influence of the gravity, liquid refrigerant in gas-liquid two phase refrigerant is liable to flow into flat pipes positioned on a relatively lower side, thereby being difficult to equally distribute the refrigerant to the plurality of flat pipes.[0004]Therefore, the parallel flow type heat exchanger may have such a structure that the pair of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F28D7/16
CPCF28D7/16F28F9/26F28D1/0417F28D1/0426F28D1/05366F28D2021/0068F24F1/16F25B2400/121F25B39/028F28F9/0273
Inventor OKAZAKI, TAKASHIISHIBASHI, AKIRALEE, SANGMUMATSUDA, TAKUYA
Owner MITSUBISHI ELECTRIC CORP