CN2740204Y

CN2740204Y - Self-air discharge filter

Info

Publication number: CN2740204Y
Application number: CN 200420057212
Authority: CN
Inventors: 盛同飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-13
Filing date: 2004-11-13
Publication date: 2005-11-16
Anticipated expiration: 2014-11-13

Abstract

The utility model provides a disposable self-air discharge filter for supersonic welding. A special compression ring is arranged between a base and an upper cover, and the height of the compression ring is matched with the space in housings. When the housings are assembled, one end face of the compression ring is in close contact with the inner surface of a corresponding housing, and the other end face of the compression ring compresses a filter membrane on a corresponding position of the inner surface of another housing. And therefore, the assembling and welding process in which three procedures are originally needed for accomplishment is simplified as a single procedure, which not only greatly enhances the production efficiency, but also can improve the qualification rate of products; additionally, the assembling and welding process is free from the limitation of the mutual fusibility of the material of the filter membrane and the housings, therefore, the select range of the membrane material is enlarged, and the product performance is optimized.

Description

From discharge filter

Affiliated technical field

This utility model relates to a kind of disposable use medical apparatus, specifically from discharge filter.

Background technology

As everyone knows, at present must be when infusing with the air emptying in the infusion set to the patient, and the impurity in the filtering liquid medicine effectively.Existingly comprise base, loam cake, pressure ring, gas phase membrane and liquid phase film from discharge filter, generally be with ultrasound wave with liquid phase film and gas phase membrane be welded on respectively base and on cover, at last again with loam cake and base seam (seeing patent 00238454.X).When filter membrane (filter membrane is the general designation of gas phase membrane and liquid phase film, down with) and shell (shell is the general designation of loam cake and base, down with) were molten mutually, the pressure ring of also useful and shell same material was earlier with after the filter membrane pressing, again the assembly welding shell.The liquid phase mould ring of portioned product and loam cake integrator, can reduce one procedure in the production, but owing to must stay liquid pass hole on the pressure ring, and cause injection mold complicated and fragile, the filter of above structure pollutes or the damage filter membrane in process of production easily in addition.

Summary of the invention

In order to overcome the deficiencies in the prior art, it is a kind of from discharge filter that this utility model provides, and need not to weld separately filter membrane, only needs one procedure just can realize the sealing of liquid phase film, gas phase membrane and shell simultaneously.

The technical scheme that its technical problem that solves this utility model adopts is: be provided with a special pressure ring between base and loam cake, space between its height dimension and loam cake and base is complementary, during the combination shell, end face of this pressure ring closely contacts with corresponding inner surface of outer cover, and the another one end face then is pressed on filter membrane on the inner surface relevant position of another shell.Liquid pass hole is realized by the passage that forms between the local breach of a certain end face of pressure ring and shell.In order to improve the thrust of filter membrane, can utilize hyperacoustic energy conduction mechanism in case of necessity, in the assembly welding shell that pressure ring and shell is welded together.

The new beneficial effect of this practicality is: at first the assembly welding process that originally needs three process to finish is reduced to one procedure, can also reduces the product fraction defective effectively when greatly having improved production efficiency; Next not direct contacted filter membrane of assembly welding process, thereby can not pollute or damage filter membrane; Assembly welding technique is not limited by filter membrane material and shell melting once more, thereby has enlarged the range of choice of film material; The injection mold of last new structure is simple and reliable.

Description of drawings

Below in conjunction with drawings and Examples this utility model is further specified

Fig. 1 is the vertical part surface structural map of this utility model embodiment 1

Fig. 2 is the concrete structure figure of middle pressure ring embodiment illustrated in fig. 1.

Fig. 3 is the vertical part surface structural map of this utility model embodiment 2.

Fig. 4 is the vertical part surface structural map of this utility model embodiment 3.

Fig. 5 is the vertical part surface structural map of this utility model embodiment 4.

Fig. 6 is the vertical part surface structural map of this utility model embodiment 5.

1 base, 2 loam cakes, 3 pressure rings, 4 gas phase membranes, 5 liquid phase films, 6 inlets, 7 liquid pass holes, 8 air vents, 9 liquid outlets among the figure

The specific embodiment

In embodiment illustrated in fig. 11, earlier liquid phase film (5) is inserted base (1), put into pressure ring (3) again, gas phase membrane (4) is inserted loam cake (2), then loam cake and base are fastened.

The physical dimension of pressure ring (3) is a core of the present utility model, and its concrete structure is seen Fig. 2, and the height of this pressure ring (is made as h ₁) with shell in space (being the internal height H behind loam cake and the base assembly welding) to be complementary, if the filter membrane thickness after will being compressed is made as h ₂, then must meet following relational expression:

h ₁+h ₂＝H

Have breach (7) on the ad-hoc location of pressure ring, the passage that forms between this breach and shell is liquid pass hole.

For reducing number of spare parts and simplifying assembling process, here gas phase membrane pressure ring (the little ring in left side among Fig. 2) is integrated with liquid phase mould ring (macro ring on right side among Fig. 2).

Strengthening bonding strength in addition if desired, can establish bonding wire on pressure ring, utilize the conduction mechanism of ultrasonic energy, is one with pressure ring and shell seam in the time of the assembly welding shell.

In embodiment illustrated in fig. 32, earlier gas phase membrane (4) and liquid phase film (5) are inserted base (1), again pressure ring (3) is put into, fasten loam cake (2) then, put in place with ultrasonic bonding and promptly finish.

In embodiment illustrated in fig. 43, tow sides repeat process embodiment illustrated in fig. 1 at twice.

In embodiment illustrated in fig. 54, there is not gas phase membrane, all the other implementing methods are with embodiment illustrated in fig. 3.

In embodiment illustrated in fig. 65, liquid phase mould ring and loam cake integrator, concrete implementing method is with embodiment illustrated in fig. 3.

Claims

1, a kind of optimization from discharge filter, combine by base, loam cake, pressure ring, gas phase membrane and liquid phase film, it is characterized in that: a pressure ring is arranged between base and loam cake, space in its height dimension and the shell is complementary, end face of this pressure ring closely contacts with corresponding inner surface of outer cover, and another end face then is pressed on filter membrane on the inner surface relevant position of another shell.

2, described from discharge filter according to claim 1, it is characterized in that: gas phase membrane pressure ring and liquid phase mould ring are designed to one.

3, described according to claim 1 from discharge filter, it is characterized in that: also be provided with bonding wire on the pressure ring.