Refrigerating unit with suction and throttle pipes interconnected by ultrasonic welding

FIELD: heating.

SUBSTANCE: proposed invention relates to a refrigerating unit with a throttle pipe (1) and a suction pipe (2) for cooling agent; the throttle pipe (1) in the first point (A) of the suction pipe (2) is inserted into the suction pipe (2) and connected to it. The throttle pipe (1) and the suction pipe (2) are interconnected in another, second point (B) of the suction pipe (2) where the outer surfaces of the throttle pipe (1) and the suction pipe (2) are contacting. As per the invention the outer surfaces of the throttle pipe (1) and the suction coil (2) in the second point (B) are interconnected by ultrasonic welding. The proposed invention relates also to the method of connection of the throttle pipe (1) and the suction pipe (2).

EFFECT: application of the invention allows for the cheap and simple protection of the throttle pipe against crumpling at the point of insertion into the suction pipe.

6 cl, 1 dwg

 

The technical field

The present invention relates to a refrigerating apparatus with throttle (capillary) and suction pipes for the refrigerant. Throttle tube at least partially passes inside the suction tube and forming the exit point out of the suction tube. Then at another point of the suction tube, where the outer surface of the choke tube and the suction tube in contact, throttle tube and suction tube are connected. The invention relates further to a method of connection of the throttle and suction tubes.

The level of technology

In home refrigerators throttle (capillary) tube before entering the evaporator, as a rule, is introduced into the suction tube and is held inside the suction tube to the evaporator. This is achieved by pre-cooling the current in the choke tube of liquefied refrigerant through heat exchange with sucked evaporated refrigerant in the suction tube. Usually the suction and the throttle tube in the place of the suction tube, in which the throttle tube is introduced into the suction tube, hermetically connected to each other by means of soldering. In the brazing material structure, which consists of a capillary tube (typically copper or copper alloy), is modified so that Kapil is popular tube without additional fastening easily be jammed. For this reason, part throttle tube on the outside of the suction tube, prior to entering into the suction tube on a course laid parallel to the suction tube and is attached to the suction tube with adhesive tape. Adhesive tape is usually applied by hand.

Another option for attaching the throttle tube to the suction tube could be wrapping the throttle tube around the suction tube. However, this would lead to the occurrence of unwanted noise.

Disclosure of inventions

The task of the invention is to create a refrigerating apparatus of the above type, which is introduced into the suction tube choke tube would be a simple and inexpensive way protected from collapse at the site of entrance into the suction tube.

This problem is solved by the refrigerating apparatus according to claim 1 and the method of connection of the intake and throttle tube refrigerating apparatus according to claim 7 claims. Dependent claims relate to preferred variants of performance of the refrigerator.

In accordance with these features of the refrigeration apparatus with the throttle and intake pipes for the refrigerant, and the throttle tube in the first point (which may be in the form of the site or area, but for brevity will be referred to as point) suction t the skirts is introduced into the suction tube and is connected with it, and the second point (which can also be made in the form of the site or area, but for brevity will be referred to as a dot) of the suction tube, in which the outer surfaces of the throttle and the intake tubes are in contact, throttle tube and suction tube are connected. According to the invention the outer surface of the choke tube and the suction tube in the second connection point of the intake and throttle tubes are interconnected by means of ultrasonic welding.

Ultrasonic welding is usually that connected the outer surfaces of the intake and throttle tubes are in contact and are excited by high frequency ultrasound. The frequency may lie in the range from about 20000 to 60000 Hz. The outer surfaces of the intake and throttle tubes RUB against each other and heat up so much that their contact surfaces fuse together. Typically, the ultrasound energy is applied to the joined tubes through the so-called Sanad (acoustic hub). Sont enhances the ultrasound generated by, for example, magnetostrictive oscillator. Magnetostrictive oscillator consists usually of several piezoceramic disks with holes, compressed between a metal tips.

Preferably, the second position where the outer surface of the throttle and the intake tubes are interconnected by means of ultrasound, is separated from the first location, where the orifice tube is inside the suction tube, 5-20 mm, better 5-15 mm, and even better for about 10 mm.

Throttle tube can be entered inside the suction tube in a variety of ways. For example, in the wall of the suction tube mo is et to be done puncture, or the inlet to the throttle tube. Then there is the possibility of connecting tube, one side of which there is a place for the end of the first section of the suction tube and the throttle tube, and which is therefore expanded. The beading is inserted into the second section of the suction tube and the throttle tube. Another possibility is that one of the sections of the suction tube to provide at one of its ends by a cover having a hole for inserting the second section of the suction tube and the inlet to the throttle tube. For example, in the case of extension suction tube in the first place has a larger diameter than second place.

With the introduction of the throttle tube in the suction tube directly in front of the evaporator, the current in the choke tube to evaporator liquid refrigerant is pre-cooled by heat exchange with sucked from the evaporator evaporates the refrigerant in the suction tube. Therefore, the second place in which the outside of the suction tube part throttle tube attached to the suction tube by means of ultrasonic welding, is relative to the refrigerant flowing in the suction tube downstream than the first place, in which the throttle tube enters into the suction tube.

As before aguinaga of the invention is the refrigeration apparatus may be for example, a domestic refrigerator or freezer.

The present invention also covers a method of connection of the suction tube refrigerating apparatus with throttle tube. The method comprises the following steps: the output of the throttle tube inside a suction tube at the first point, which serves as the point of outlet of the suction tube; the connection of the suction tube and the throttle tube to the first point, in particular by soldering; the establishment of contact between the outer surface of the throttle body tube, outside the suction tube, and the outer surface of the suction tube at the second point of the suction tube; the connection of the suction tube and the throttle tube to the second point. Thus the outer surface of the suction tube and the throttle tube are interconnected by means of ultrasonic welding. These technological steps preferably are performed in the above sequence. However, it is also possible to modify the specified sequence. For example, you can first enter the throttle tube inside a suction tube, then attach the throttle tube to the suction tube by means of ultrasonic welding for further protection from collapse and, finally, to connect the throttle tube with a suction tube in place of the entrance throttle tube vocatively preferably by means of soldering.

A brief list of figures

Other characteristics and advantages of the invention ensue from the following description of example with reference to the accompanying drawing.

It presents part of the evaporator 3 with throttle tube 1, the inlet refrigerant suction pipe 2, and a discharge refrigerant, and the connection of the two tubes in front of the evaporator 1 in the section.

The implementation of the invention

The drawing shows a throttle tube 1 and the suction tube 2 proposed in the invention of the refrigeration apparatus. Himself refrigeration unit is not shown, because its design specialists known. As the refrigeration apparatus may be, for example, a domestic refrigerator. On the throttle (capillary) tube 1 liquefied refrigerant flows into the evaporator 3 of the refrigeration apparatus. Throttle tube enters the curving in the shape of a meander (which is not visible in the figure is a partial sectional view) on the entire surface of the evaporator 3 channel 4 refrigerant. Channel 4 refrigerant ends of the connecting section 5 of the evaporator 3, which introduced and fixed suction tube 2. Suction tube 2 displays the evaporated refrigerant from the evaporator 3. Suction tube 2 and the throttle tube 1 is a thin-walled tube with an internal diameter of a few millimeters in the case of the suction tube 2 and a few dollars is th of a millimeter in the case of the throttle tube 1.

Before the evaporator 3 throttle tube 1 at the first point And the suction tube 2 is provided in the suction pipe 2 and passes to the evaporator 3 inside the suction tube 2 to its end in the connecting section 5 of the evaporator 3. By placing the throttle in the suction tube 1 tube 2 is provided preliminary cooling passing through the throttle tube 1 liquefied refrigerant through heat exchange with sucked evaporated refrigerant in the suction tube 2. In the present constructive variant suction tube 2 consists of at least two sections 9 and 10, hermetically connected by a connection tube 11. Directly connected to the evaporator 3 section 10 of the suction tube with one end connected with the connecting tube 11, which is the first point A. connecting tube 11 is expanded, and it provides the output to the throttle tube 1. In the extension entered section 9 of the suction tube 2 and the throttle tube 1. Section 9 of the suction tube 2 ends in the extension. Throttle tube 1 passes to the evaporator 3 in section 10 of the suction tube 2. Section 9 of the suction tube 2 and the throttle tube 1 are sealed and connected to the extension connector tube 11 with section 10 of the suction tube 2 by means of soldering.

Unlike variations is that, shown in the drawing, an alternative design in which the throttle tube 1 at the point And the suction tube 2 is introduced into the suction tube 2 through the puncture, or inlet, in the extension of the suction tube 2 or the connecting tube 11. In this case, the suction tube 2 could consist of only one section. Could also be equipped with a connecting tube 11 at the first point And cover with two apertures, one for the insertion of section 9 of the suction tube and the other for the introduction of the throttle tube 1. Throttle tube 1 and the suction tube 2 and in this case you want to connect in place of the entrance throttle tube 1 in the suction tube 2 by means of soldering.

Suction tube 2 and the throttle tube 1 are typically made of copper or a copper alloy. When soldering the copper structure of the material changes, which leads to deterioration of the strength characteristics of the copper material. Therefore, the throttle tube 1 under mechanical load in place solder the entrance to the suction tube 2 can easily crack. To avoid this, the throttle tube 1 is attached to the suction tube 2 by means of ultrasonic welding in another second the point C. At this point In the throttle tube 1 is located outside the suction tube 2. In the depicted embodiment, enforcement is the second point In the suction tube 2 is located downstream passing through the suction tube 2 refrigerant than the first point And the suction tube 2. A suitable distance between the first point and the second point is approximately 5 to 20 mm, preferably approximately from 5 to 15 mm, and most preferably about 10 mm

The connection throttle tubes 1 and the suction tube 2 in both points a and b may be, for example, in the following order: throttle tube 1 at the point And is displayed inside the suction tube 2 and is connected by means of soldering. Then the outer surface is located outside the suction tube 2 of the throttle body tube 1 is brought into contact with the outer surface of the suction tube 2 at point b, i.e. the throttle tube 1 is applied to the suction tube 2. Contacting the outer surface of the throttle tube 1 and the suction tube 2 are interconnected by means of ultrasonic welding. This occurs under the influence of high frequency ultrasound. The frequency may lie in the range from 20000 to 60000 Hz. Under the action of ultrasound outer surface of the throttle tube 1 and the suction tube 2 RUB against each other and heat up so much that their contact surfaces fuse together. Typically, the ultrasound energy is applied to the joined tubes through the so-called Sanad (acoustic hub). Sont enhances ul is razwy, generated, for example, magnetostrictive oscillator. Magnetostrictive oscillator may consist of several piezoceramic disks with holes, compressed between a metal tips.

The above processing operations on the connection throttle tubes 1 and the suction tube 2 at the points a and b can also be performed in other sequences than described. For example, you can first enter the throttle tube 1 at a point a inside the suction tube 2, then attach the throttle tube 1 at a point In the suction tube 2 by means of ultrasonic welding, and then solder the throttle tube 1 with the suction pipe 2 at the point A.

1. Refrigerating apparatus with suction tube (2) and throttle tube (1)which at least partially extends into the suction tube (2) and forming a point (A) output outputted from the suction tube (2)and throttle tube (1) and suction tube (2) connected between a second point (In) suction tube (2), in which the outer surfaces of the throttle tube (1) and suction tube (2) contact, characterized in that the outer surface of the throttle tube (1) and suction tube (2) at the second point (B) are connected by ultrasonic welding.

2. The refrigeration apparatus according to claim 1, characterized who eat what is the distance between the first point (A) output and the second point (b) is from about 5 to 20 mm, and preferably about 10 mm

3. The refrigeration apparatus according to claim 1 or 2, characterized in that the second point (B) is located downstream passing through the suction tube (2) refrigerant than the first point (A) of the output.

4. The refrigeration apparatus according to claim 3, characterized in that the point (A) output is provided on the connecting tube (11)on which downstream sealed suction tube (2), and the throttle tube (1).

5. The refrigeration apparatus according to claim 4, characterized in that the suction tube (2) in the area of the output point (A) has an extension or puncture to the throttle tube (1).

6. The method of connection of the suction tube (2) of the refrigeration apparatus with throttle tube (1)comprising the following operations:
remove the throttle tube (1) inside the suction tube (2) at the point (A) of the outlet of the suction tube (2),
connect the suction tube (2) and throttle tube (1) at the point (A) output, in particular by soldering,
create contact between the outer surface of the throttle body tube (1), outside the suction tube (2), and the outer surface of the suction tube (2) at the second point (In) suction tube (2),
connect the suction tube (2) and throttle tube (1) at the second point (B)distinguishing the I, that the outer surface of the suction tube (2) and throttle tube (1) connected between a second point (B) by means of ultrasonic welding.



 

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