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Suction mufflerRelated Patent Categories: Pumps, With Muffler Acting On Pump FluidSuction muffler description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070212234, Suction muffler. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001] The present invention concerns a suction muffler for silencing simultaneously as it absorbs a gas, more specifically a suction muffler made of resin. BACKGROUND ART [0002] In recent years, there is a strong request for equipment with high energy efficiency, as hermetic compressor used for refrigerator, etc. from the viewpoint of prevention of global warming. It is already known that, generally, a suction muffler with low thermal conductivity made of synthetic resin, etc. is suitable as suction muffler to be used for hermetic compressor. [0003] Conventionally, as suction muffler, a product bonded by ultrasonic welding by having a projection and a concavity respectively at the bonding portion of the mating molded resin piece is known (refer to Japanese Laid-Open Patent Publication No. S59-43917, for example). [0004] FIG. 11 is a side exploded view of a conventional suction muffler. Suction muffler 1 is constructed by bonding first body 2 and second body 3 made of molded resin piece to each other, at edges 2a, 3a provided respectively. Flange 5 having convexity 4 is formed at edge 2a, and flange 7 having concavity 6 is formed at edge 3a, respectively. And, first body 2 and second body 3 are bonded to each other along bonding direction 11a. Moreover, refrigerant gas is sucked into a non-illustrated compression chamber through communicating tube 14. [0005] FIG. 12 is a sectional view of main part of the conventional suction muffler given in FIG. 11, and shows especially the state of bonding of flange 5 provided on the first body 2 side and flange 7 provided on the second body 3 side, made along bonding direction 12a. As it was shown also in FIG. 11, concavity 6 is provided on the second body 3 side. [0006] FIG. 13 is a drawing showing the manufacturing system of the conventional suction muffler. Suction muffler 1 shown in FIG. 11 used to be molded by positioning respective flanges 5, 7 of first body 2 and second body 3 at concavity 6 with convexity 4 and pressing them with horn 9 and frame 10 of press 8 indicated in FIG. 13 and, at the same time, by shaking them with application of ultrasonic vibrations while pressurizing flanges 5, 7 evenly, along bonding direction 13a, and bonding first body 2 and second body 3 to each other by means of ultrasonic welding. [0007] In the above-described conventional suction muffler made of resin, part of the resin is melted with ultrasonic wave and the bonded portion of the parts is pressed at the same time. For that reason, in case the bonding accuracy at the bonded portion is not so good, a problem is produced that part of the molten resin jumps out through the gap at the bonded portion, sticking to the inside of the suction muffler and solidifying there. Such part of molten resin which solidified inside the suction muffler is generally called "slag." [0008] Such slag produced inside the suction muffler is difficult to check for production and remove in advance, because the production of slag takes place after the bonding of resin members. Should the slag remaining inside the suction muffler be separated, it is sucked into the compressor together with the refrigerant, to present a problem of narrowing the sliding portion of the compressor, eventually leading to a stop of compressor. DISCLOSURE OF THE INVENTION [0009] The present invention provides a suction muffler capable of enhancing the reliability of compressor. [0010] The suction muffler according to the present invention has a plurality of bonding portions made of resin members either fit to each other or put in contact with each other, and bonded by means of a resin belt formed with secondary injection molding. The surface of the bonding portion of the resin members molded in advance are bonded to each other by utilizing the heat of the molten resin injected with secondary injection molding. To that purpose, the pressing of the bonding portions and the shaking given to the suction muffler are controlled to control the production of so-called slag. Such suction muffler according to the present invention can eliminate the step of pressing to the bonding portions, in the case where a suction muffler constructed with a plurality of resin members is bonded, thus enabling to provide a suction muffler capable of enhancing the reliability of compressor, by preventing production of slag. [0011] The concrete construction of the suction muffler according to the present invention consists in either fitting or putting in contact with each other the bonding portion of a plurality of resin members formed in advance by injection molding. At the same time, the bonding portion is bonded with a resin belt formed with secondary injection molding. Since the bonding of molten resin is made with heat only, this enables to prevent production of slag due to pressing of bonding portions, and to thus provide a suction muffler capable of enhancing the reliability of compressor. [0012] Moreover, the suction muffler according to the present invention has the shape of its bonding face at the fitting portion bent, in the cross section of the bonding portion. Such construction increases the inflow resistance, and this makes it possible to prevent the problem of molten resin flowing into the suction muffler, even in case of inflow of molten resin in the bonding face. This enables to enhance the reliability of compressor. [0013] Furthermore, the suction muffler according to the present invention forms fine projections at the outer circumference of the bonding portion to be bonded by secondary injection molding. A plurality of fine projections provided at the outer circumference of the bonding portion enable to increase the heat receiving surface area on the resin member side. This makes it possible to heat either the fine projections or fine ribs in a comparatively short time, thus enabling to form a suction muffler with bonded resin members. Such construction enables to provide a suction muffler of higher productivity. [0014] Still more, the suction muffler according to the present invention forms a flange which may be realized also by integration in the state in which the contacts of the bonding portion to be bonded by secondary injection molding are in contact with each other. After the bonding, by providing flanges across the bonding face, it becomes possible to engage the resin belt and the resin members formed by secondary injection molding with each other by means of the flanges, in addition to the reactive force applied to the melting portion of the resin belt and the resin members formed by secondary injection molding, even in the case where an outer force is applied in the direction in which the resin members forming the suction muffler are removed. Such construction enables to provide a suction muffler capable of further improving the reliability of compressor. [0015] Yet more, the suction muffler according to the present invention has a tail pipe formed separately inside the suction muffler, and a through hole communicating with the tail pipe at the bonding portion. In addition, the resin members and the tail pipe are combined by means of secondary injection molding. By bonding the tail pipe and the resin members forming the suction muffler at a time, it becomes possible to omit the facilities and working process for bonding the tail pipe, thus enabling to provide an inexpensive suction muffler. BRIEF DESCRIPTION OF THE DRAWINGS [0016] FIG. 1 is a perspective view of the suction muffler in preferred embodiment 1 of the present invention. [0017] FIG. 2A is a side exploded view of the suction muffler in preferred embodiment 1 of the present invention. [0018] FIG. 2B is a side exploded view of the suction muffler in preferred embodiment 1 of the present invention. [0019] FIG. 3A is an expanded view of the portion A indicated in FIG. 2, in preferred embodiment 1 of the present invention. [0020] FIG. 3B is an expanded view of the portion B indicated in FIG. 2, in preferred embodiment 1 of the present invention. Continue reading about Suction muffler... Full patent description for Suction muffler Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Suction muffler patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Suction muffler or other areas of interest. ### Previous Patent Application: Air compressor Next Patent Application: Pump and motor arrangement Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Suction muffler patent info. IP-related news and info Results in 0.13442 seconds Other interesting Feshpatents.com categories: Daimler Chrysler , DirecTV , Exxonmobil Chemical Company , Goodyear , Intel , Kyocera Wireless , 174 |
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