WO2007132620A1

WO2007132620A1 - Air conditioner

Info

Publication number: WO2007132620A1
Application number: PCT/JP2007/058347
Authority: WO
Inventors: Taii Tsuji
Original assignee: Panasonic Corporation
Priority date: 2006-05-15
Filing date: 2007-04-17
Publication date: 2007-11-22
Also published as: JPWO2007132620A1; CN101443599A

Abstract

Underframe (1) of air conditioner is provided with aperture diaphragm (8) capable of regulating the resin injected from resin injection port (7a) in the course of the flow thereof. Accordingly, the flow of the resin can be stabilized, and not only insufficient rounding of the resin but also contrarily, flow of much resin into a certain part leading to application of a resin pressure above specified level to the part to thereby cause warpage of shaped item can be prevented. As a result, most appropriate resin injection configuration can be obtained easily.

Description

Specification

Air conditioner

Technical field

TECHNICAL FIELD [0001] The present invention relates to an air conditioner having a frame that is molded with a resin.

Background art

[0002] Conventional air conditioners generally have outer parts mainly composed of a resin molded product. The rear surface of the air conditioner is a resin frame and the front surface of the air conditioner. Is made of a front frame made of greaves (see, for example, Patent Document 1).

FIG. 4 is an exploded perspective view of the conventional air conditioner described in Patent Document 1, and FIG. 5 is a rear view of the frame of the conventional air conditioner.

As shown in FIG. 4, the air conditioner includes a base frame 1, a heat exchanger 2, a motor 3, a fan 4, a blowout grill 5, and a front frame 6. In other words, there is a frame 1 as a base part of the air conditioner configuration. A heat exchange ^^, a motor 3, a fan 4, etc. are attached to the frame 1, and a design such as a blowout grill 5 and a front frame 6 is provided. Parts are installed.

[0005] As described above, the frame 1 is a resin molded product and is molded by a molding method such as injection molding. Injection molding is a molding method in which a resin injection loca is injected into a mold by applying pressure to the resin melted by heat, and the cooled and solidified part is taken out of the mold. Therefore, as shown in FIG. 5, the resin injection port is provided in the mold at a position corresponding to the resin injection port 7 on the back surface of the frame 1.

[0006] At the time of injecting the resin, the channel, the channel length, and the like are devised, and the flow of the resin flows from the injection part to the end of the channel is interrupted in the direction of the resin flow. Some have a channel whose area changes (see, for example, Patent Document 2).

[0007] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2003-202122

Patent Document 2: Japanese Patent Laid-Open No. 2003-191289

Disclosure of the invention

Problems to be solved by the invention

[0008] However, in the above-described conventional configuration, the position and number of the oil filler inlets 7 are different during molding. The flow of the resin is not stable and the resin rotates sufficiently. On the other hand, a large amount of the resin flows in one part and the resin pressure exceeds the specified value. May occur.

[0009] In particular, relatively large and thin parts, such as the frame of an air conditioner, require parts accuracy because of the long flow path of the resin molding and the large temperature change of the air conditioner itself. For this reason, the design of the resin flow passage, particularly the number of the oil injection ports, is important. The number of the oil filler inlets is checked with the conventional products or in advance through partial analysis, but finally the actual product is checked at the time of the molding trial after the mold is completed. It takes a lot of time and money to make changes to optimize the design, such as increasing or decreasing the number of inlets.

[0010] The present invention has been made in view of the above-described problems of the prior art, and by easily obtaining an optimal resin injection shape, the resin can be molded easily and accurately in a short period of time. The purpose is to provide an air conditioner with a frame!

Means for solving the problem

In order to achieve the above object, the present invention is an air conditioner having a base frame that is molded with a resin, and the frame has at least one throttle part that regulates the flow of the resin during molding. It is characterized by this.

[0012] Further, it is preferable that the throttle portion is constituted by a concave portion provided in the vicinity of the grease injection port.

[0013] Further, it is preferable that the narrowed portion is formed by integral molding with the base frame, and that the thickness of the reduced portion can be increased or decreased.

The invention's effect

[0014] According to the present invention, since the throttle portion for restricting the flow of the resin during molding is provided in the frame, the flow of the resin is stabilized and the moldability is improved. Also, it should be possible to prevent the molded product from being warped due to sufficient rotation of the resin, or on the contrary, a large amount of the resin flowing in part, and the resin pressure exceeding the specified level being applied to that part. Therefore, it is possible to obtain an optimum sachet-injected shape or a desired shape of the frame in a short time.

[0015] Further, since the throttle portion is formed by a concave portion provided in the vicinity of the resin injection port, the resin flow immediately after injection is regulated and stabilized.

[0016] Further, by forming the diaphragm part integrally with the underframe, the processing can be done only once. Necessary cost and time can be reduced.

[0017] In addition, if the resin can be molded so that the thickness of the resin in the drawn part can be increased or decreased, the flow of the resin can be easily controlled by changing the drawn shape, and the molding stability of the parts can be secured. At the same time, it is possible to easily obtain an optimum sachet-injected shape by suppressing shape defects such as warping. Brief Description of Drawings

FIG. 1 is a rear view of a frame of an air conditioner according to the present invention.

[Figure 2] Enlarged view of the main part of the underframe in Figure 1

[Fig. 3] Cross-sectional view of the main part of the underframe of Fig. 1

圆 4] Exploded perspective view of a conventional air conditioner

[Figure 5] Rear view of conventional air conditioner frame

Explanation of symbols

[0019] One frame

2 Heat exchanger

3 Motor

4 fans

5 Blowout Darinole

6 words

7, 7a

8 Aperture

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

FIG. 1 is a rear view of a frame of an air conditioner according to the present invention, FIG. 2 is an enlarged view of a main part of the frame, and FIG. 3 is a cross-sectional view of a main part of the frame. The overall configuration is almost the same as the conventional configuration shown in FIG.

As shown in FIG. 1, the frame 1 is provided with a plurality of grease injection ports 7, and among these resin injection ports 7, particularly located near the center of the back surface of the frame 1. In the vicinity of a plurality (for example, two) of the resin inlets 7a, a semicircular throttle portion 8 for restricting the flow of the resin is provided. . As shown in FIG. 2, each of the resin injection ports 7a is circular, and the throttle portion 8 is formed as a semicircular recess substantially concentric with the resin injection port 7a around the resin injection port 7a.

[0023] When the underframe 1 is formed by injection molding, pressure is applied to the resin material melted by heat, and injection is performed simultaneously from a plurality of resin injection ports 7, 7a into a mold (not shown). However, in the present embodiment, the resin flowing from the resin injection port 7 other than the resin injection port 7a in the vicinity of the central portion flows into the resin from the resin injection port 7a. Since the path narrows, the inflow speed of the resin changes, and the flow rate is controlled to be constant, so that the flow of the resin is stabilized. Therefore, sinking may occur without the resin being sufficiently swirled, or conversely, if a large amount of resin flows in a part of the part, and the resin pressure exceeding the specified level is applied to that part, warping will occur in the molded product. This makes it possible to mold the frame 1 with high accuracy.

[0024] In addition, the diaphragm portion 8 can be molded together with the frame 1 at the same time simply by providing a convex portion complementary to the shape of the die portion 8 at the same time. It can be suppressed.

[0025] Further, by adjusting the height of the convex part of the mold, it is possible to form the resin so that the thickness of the resin of the drawn part 8 can be increased or decreased. By changing the width, the flow of the resin can be easily controlled. As a result of this setting, if the resin injected from the resin injection port 7 and the resin injected from the resin injection port 7a are set to join in a timely manner, a part of the resin flows too quickly or slow. Therefore, it is possible to optimize the molding time, and to mold molded parts that are not warped by excessive molding pressure.

As an example, as shown in FIG. 1 to FIG. 3, when the width w of the frame 1 is 1200 mm and the height h force is 50 mm, the hole diameter d of the resin injection port 7a is 2 mm. The radius of the throttle 8 (outer wall radius) r, which is approximately concentric with the inlet 7a, is set to 30 mm, and the width wr of the throttle 8 is set to 5 mm. In addition, the thickness 1 of the frame 1 is set to 3.5 mm, while the throttling 8 is set so that the thickness tht of the resin is 30% to 40% thinner than the other parts. Depending on the state of the time, the thickness tht of the squeezed part is changed to control the flow of the resin, stabilizing the moldability and realizing optimal molding.

[0027] As described above, in the present embodiment, the throttle portion 8 that is integrally molded with the base frame 1 is provided in the vicinity of the oil inlet 7a of the base frame 1 constituting the air conditioner. Infused rosin By controlling the flow of the oil, the flow of the resin is stabilized. Therefore, it is possible to prevent the molded product from warping due to the sufficient rotation of the resin, or conversely, a large amount of resin flowing in a part and the resin pressure exceeding the specified value being applied to that part. Therefore, it is possible to easily obtain an optimum sachet injection shape. Furthermore, the flow of the grease can be easily controlled by changing the shape of the drawing as a structure that can be molded to increase or decrease the thickness of the drawn portion. It is possible to easily obtain the optimum grease injection shape while suppressing defects.

In the present embodiment, the narrowed portion 8 is formed in a semicircular shape, but the length of the arc may be longer than a semicircle or a full circle. In addition, the number of apertures 8 is appropriately set according to the shape of the frame 1.

Industrial applicability

[0029] As described above, the air conditioner according to the present invention can improve moldability by providing a constricted portion around some of the resin injection ports for molding. Therefore, it can be applied not only to air conditioners but also to general uses of resin molded products.

Claims

The scope of the claims

[1] An air conditioner having a base frame molded with a resin,

The air conditioner characterized in that the underframe has at least one throttle part that restricts the flow of the resin during molding.

[2] The air conditioner according to [1], wherein the throttle portion is a concave portion provided in the vicinity of the oil filler inlet.

[3] The air conditioner according to [1] or [2], wherein the throttle portion is formed by resin molding integrally with the underframe.

[4] The air conditioner according to any one of [1] to [3], wherein the throttle portion can be molded with a resin so that the thickness of the resin can be increased or decreased.