JPS62158991A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat transfer characteristics by a method wherein a header is formed by laminating and integrating outer wall members, provided with protuberances slanted so that the inlet port of refrigerant becomes lower, on both surfaces of a flat plate type flow path member provided with a plurality of slits while the slits are communicated with each other and are communicated with the outlet and inlet pipes of the refrigerant. CONSTITUTION:A flow path member 12 is provided with a plurality of slits 13 in parallel while an outer wall member 14 is provided with a protuberance 17, communicating the slits 13 with each other and forming a header 16 communicated with the inlet and outlet pipe 15 of refrigerant. The protuberance 17 is slanted so as to be recessed at the side of the outlet and inlet pipe 15 with respect to a flat plate type flow path unit 11 while the same is slanted so as to be protruded at the opposite side. Accordingly, the refrigerant is affected by not only a gravity orthogonal to the direction of the flow thereof but also the gravity in the flow direction of the same by the slant of the header 16. Especially, the inlet art of the refrigerant is made lower, therefore, the inertia force of liquid is cancelled by the compo nent of the gravity in the flow direction of the liquid. As a result, the height of the level of the liquid may be kept in horizontal whereby the distributing characteristics of the refriger ant into the slits 13 may be improved and heat transfer characteristics may also be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat exchanger used, for example, in a refrigerator.

BACKGROUND ART A conventional heat exchanger of this type has a structure as shown in FIG.

That is, reference numeral 1 denotes a flat flow path section, which is arranged parallel to the air flow direction 2. A large number of fin members 3 are attached to the outer wall of the flat flow path section 1 substantially parallel to the airflow direction 2. 4 is a refrigerant inlet/outlet pipe connected to the flat flow path section 1. The refrigerant flowing in from one of the inlet/outlet pipes 4 flows within the flat flow path portion 1 . At this time, the air receives heat from the airflow side through the fin member 3, evaporates, and flows out from the other inlet/outlet pipe 4.

FIG. 4 is an exploded perspective view of a flat member constituting the flat flow path portion 1. FIG. The flow path member 6 is provided with a plurality of parallel slits 6 that serve as refrigerant flow paths. On both sides of the flow path member 5, outer wall members 7, which become outer walls of the coolant flow path when stacked, are located. The outer wall member 7 has a plurality of slits 6 provided in the flow path member 6 communicating with each other, and a refrigerant inlet/outlet pipe 4.
A ridge 9 is provided which constitutes a header 8 leading to.

The flat flow path section 1 is constructed by laminating and integrating the above three members.

Problems to be Solved by the Invention However, with such a structure, there is a problem in that there is large variation in the branching of the refrigerant to the slits 6 that serve as refrigerant flow paths.

The reason for this will be explained below using FIG. 6th
The figure is a cross-sectional view showing the flow state of the refrigerant inside the header 8. The refrigerant flowing from the inlet/outlet pipe 4 separates into gas and liquid in the header 8 due to the influence of gravity and flows therethrough. Inside the header 8, the liquid flows while branching into the sleeves 6, but due to the inertial force of the liquid, the liquid level shows a high distribution on the opposite side of the inlet and outlet 11. Therefore, the refrigerant with a high degree of dryness flows into the slit 6 near the entrance/exit pipe, and the refrigerant with a low degree of dryness flows into the slit 6 on the opposite side of the entrance/exit pipe.

Therefore, the present invention provides a heat exchanger with excellent heat transfer characteristics by improving the branching characteristics of the refrigerant.

Means for Solving the Problems The technical means of the present invention for solving the problems described above is to provide a flat flow path member on both sides of which a plurality of sts, which serve as refrigerant flow paths, are provided. , a header is formed by laminating and integrating an outer wall member that connects the plurality of sts with each other, communicates with a refrigerant inlet/outlet pipe, and has an inclined protuberance that lowers the refrigerant inlet with respect to the vertical direction. It is something that forms.

action The effect of this technical means is as follows.

Due to the inclination of the header, the refrigerant is not only affected by gravity perpendicular to the flow direction, but also affected by gravity in the flow direction.

In particular, since the refrigerant inlet is made low, the inertial force of the liquid and the flow direction component of the power cancel each other out.

As a result, it becomes possible to keep the liquid level level horizontally, and the branching characteristics of the refrigerant to the slits can be improved.

Embodiment FIG. 1 is an exploded perspective view of a flat member constituting a flat flow passage section 11 in which a heat exchanger according to an embodiment of the present invention is used in an evaporator for a refrigerator.

The flow path member 12 is provided with a plurality of parallel slits 13 that serve as refrigerant flow paths. 2 on both sides of the channel member 12
, an outer wall member 14 that becomes an outer wall of the refrigerant flow path when stacked is located. The outer wall member 14 has the same outer dimensions as the channel member 125. The outer wall member 14 is provided with a protuberance 17 that allows the plurality of slits 13 provided in the flow path member 12 to communicate with each other and constitutes a header 16 that communicates with the refrigerant inlet/outlet pipe 15 . The protuberance 17 is inclined so that it is convex downward on the side of the inlet/outlet pipe 15 with respect to the flat flow path portion 11 and convex to the opposite side. The flat flow path section 11 is constructed by laminating and integrating the above three members.

FIG. 2 is a sectional view showing the flow state of the refrigerant in the header 16. The refrigerant flowing in through the inlet/outlet pipe 16 is separated into gas and liquid and enters the tank. Within the header 16, the liquid is subject to inertial forces and gravity. Gravity can be considered separately into a component B in the direction of movement of the refrigerant and a component B perpendicular thereto. Since the component B is in the opposite direction to the inertial force, it is canceled out, and the liquid level exhibits a nearly horizontal distribution due to the influence of only the component B. Therefore, the refrigerant having the same degree of dryness and the same flow rate flows into the slit 13 serving as the refrigerant flow path.

6., -5 Although not shown in Fig. 1, when actually configured as an evaporator, fins are installed on both sides of the outer wall member 14 of the flat flow path section 11 to facilitate heat exchange with the air. Let's do it.

In the embodiment shown in FIG. 1, the shape of the protuberance 17 is rectangular, but the same effect can be obtained even if the protuberance 17 is oval or other shape.

Effects of the Invention The undeveloped F3A has a flat flow path member provided with a plurality of slits serving as a refrigerant flow path, on both sides of which the plurality of slits are communicated with each other, and communicated with a refrigerant inlet/outlet pipe, and in a vertical direction. On the other hand, by laminating and integrating outer wall members with slanted protuberances that lower the refrigerant inlet to form a header, it is possible to improve the refrigerant branching characteristics and create a heat exchanger with excellent heat transfer characteristics. Become.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a flat plate-like member constituting a flat-plate flow passage section used in a heat exchanger according to an embodiment of the present invention, and FIG.
Figure 3 is a cross-sectional view showing the flow of refrigerant in the header, Figure 3 is an overall perspective view of a conventional evaporator, and Figure 4 shows the flat member constituting the flat flow path in Figure 3. FIG. 5 is an exploded perspective view and a cross-sectional view showing the flow of refrigerant in the heel of the evaporator of FIG. 3. 1.11...Flat channel portion, 3...Fin member, 5.12...Flow channel member, 8,14.
... External wall members, 10.17 ... Uplift. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 17 Uplift Figure 2 Figure 4 Figure 4

Claims (1)

[Claims] The plurality of slits are made to communicate with each other on both sides of a flat flow path member provided with a plurality of slits serving as refrigerant flow paths,
A heat exchanger in which outer wall members are laminated and integrated, each having an inclined ridge that communicates with a refrigerant inlet/outlet pipe and has a refrigerant inlet lower than the vertical direction, and fins are installed on both sides of the outer wall member.