JPH04168A - Accumulator for 2 cylinder compressor - Google Patents

Abstract

PURPOSE:To protect each outlet pipe from vibration induced by resonance for the service of tuning fork by bringing each inner insertion section of a first outlet pipe and a second outlet pipe to be inserted into an accumulator main body from its bottom wall into close contact with each other and maintaining their cross contact with an adhesion maintenance means. CONSTITUTION:The internal insertion sections of a first outlet pipe 4 and a second outlet pipe in each straight run section 41 and 51, which are inserted into an accumulator main body 2, are brought into close contact with each other. Under the tightly contact state, they are inserted into an insertion hole 61 of a middle support plate 6 and fixedly installed in the accumulator main body 2. When driving a compressor, even if the vibration of the compressor is transmitted to the outlet pipes 4 and 5, this construction will prevent each outlet pipe 4 and 5 from acting as a tuning fork and resounding. Furthermore, the tip of each outlet pipe 4 and 5 are arranged to keep the same level in the accumulator main body 2, which makes it possible to maintain an effective capacity for the accumulator to a satisfactory extent and suck up the same amount of refrigerant gas from each outlet pipe 4 and 5 into a first cylinder 12 and a second cylinder 14 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is mainly concerned with accumulators for two-cylinder compressors in air conditioning systems, etc. Regarding machine accumulators.

(Prior art) Conventionally, as an accumulator for this type of two-cylinder compressor,
For example, as shown in Fig. 8, two outlet pipes (B2) (C
2) separately from the bottom wall (E) of the accumulator body (D), and insert the winter Yamaguchi pipes (B2) (C2) into each of the compressor elements (B) and (C) of the compressor (A). Each cylinder (B
l) (C1), but inside the accumulator body (D), the two outlet pipes (B
2) Since the lengths of (C2) are equal, the outlet pipe (B2) (
C2) resonates like a tuning fork and generates sound at a certain frequency, causing a problem in which the noise of the compressor increases.

Therefore, the accumulator body (D
) Inside, the lengths of the outlet pipes (B2) and (C2) are made different to prevent vibrations caused by the resonance.

(Problem to be Solved by the Invention) However, the accumulator shown in FIG.
Since the effective volume is determined by the short length of the outlet pipe (C2), there has been a problem that the effective volume as a whole becomes small.

On the other hand, as shown in Japanese Unexamined Patent Publication No. 1-247776 and as shown in FIG. The outlet pipe (
It has also been proposed that F) is branched into two (Fl) (F2) and the refrigerant gas is sucked into the cylinders (Bl) (C1). According to this structure, the vibration problem and the effective volume problem can be solved, but the outlet pipe CF
), the refrigerant gas becomes turbulent at the branching point, and the same amount of gas no longer flows to each branching path, resulting in another problem: a reduction in compressor performance. .

In addition, when two outlet pipes (B2) (C2) are provided, each outlet pipe (B2) is
It is preferable to install an intermediate support plate in the accumulator main body (D) in order to prevent the accumulator (C2) from vibrating or falling down due to vibrations from the compressor. Since it was very difficult to insert the pipes (B2) and (C2) separately into the intermediate support plate, most conventional systems did not use the intermediate support plate, and as a result, the compressor vibration cannot be prevented from occurring, and furthermore, each outlet pipe (B2) (
It was also not possible to prevent C2) from falling inside the achinimulator main body (D).

The present invention was invented in view of the above problems.
The main purpose is to prevent resonance vibration caused by the two outlet pipes while inserting the two outlet pipes into the main body of the compressor, and to ensure a sufficient effective volume to prevent the capacity of the compressor from decreasing. Another object of the present invention is to provide an accumulator for a two-cylinder compressor that can prevent the above-mentioned problems from occurring.Another object of the present invention is to provide an accumulator for a two-cylinder compressor that can be easily assembled to the intermediate support plate even when the intermediate support plate is installed inside the accumulator body while achieving the above-mentioned purpose. It is another object of the present invention to provide an accumulator which can achieve the above-mentioned purpose while also ensuring airtight leakage between the two outlet pipes and the seven-accumulator main body with a simple structure. An object of the present invention is to provide an accumulator for a two-cylinder compressor that can prevent the above problems and improve productivity.

(Means for Solving the Problem) Therefore, in order to achieve the above object, the present invention provides a two-cylinder cylinder having one inlet pipe (3) and two outlet pipes (4) and (5). An accumulator for a compressor, in which the inner parts of the outlet pipes (4) and (5) inserted into the accumulator body (2) from the bottom wall (22) are brought into close contact with each other, and a contact maintenance means for maintaining this close contact. .

Further, it is preferable that the accumulator body (2) is provided with an intermediate support plate (5) having one insertion hole (61) through which the two outlet pipes (4) and (5) that are in close contact with each other are inserted.

Furthermore, the through holes (24) of the outlet pipes (4) and (5) provided in the bottom wall (22) of the accumulator body (2) can be inserted with the two outlet pipes (4) and (5) in close contact with each other. The outlet pipe (4) is formed into a long hole of a suitable size and is in close contact with the outlet pipe (4).
A plate-shaped mounting member (8) is formed which has an insertion hole (81) shaped along the outer peripheral surface of the bottom wall (5) and covers the through-hole (24), and the mounting member (8) is attached to the bottom wall ( 22) is preferable.

(Function) The outlet pipe (
4) All or part of the inner part of (5) may be brazed, or each outlet pipe (4) (
By bringing them into close contact with each other using a close contact maintenance means such as partial contact of the inner part of 5), it is possible to prevent the respective outlet pipes (4) and (5) from resonating with each other like a tuning fork and causing vibration, and This makes it possible to prevent the effective volume within the accumulator from becoming small, and to make the flow rate of refrigerant gas to each of the outlet pipes (4) and (5) the same.

Further, the two outlet pipes (4) and (5) can be inserted into the accumulator main body (2) in a close contact state.
By providing an intermediate support plate (5) having two insertion holes (61), the outlet pipes (4) and (5) are brought into close contact with each other. ) can be easily assembled to the intermediate support plate (5), and the outlet pipes (4) and (5) can be placed in proper positions without falling inside the outlet pipes (4) and (5). can be maintained.

Further, the through hole (24) provided in the bottom wall (22) of the accumulator body (2) is connected to the two outlet pipes (4) (5).
) is formed into a long hole having a size that allows the outlet pipe (4) to be inserted into the bottom wall (22) in close contact with the outlet pipe (4).
) (5) There is no need to provide a through hole with a complicated shape to match the external shape of the bottom wall (24).
22) can be formed simultaneously with the molding of the bottom wall (22).
22) can be easily formed, and in addition, a plate-shaped mounting member (8) is formed separately, and the shape follows the outer circumferential surface of the outlet pipes (4) and (5) that are in close contact with the mounting member (8). an insertion hole (81) is formed, and the mounting member (8) is attached to the bottom wall (2).
2), so the accumulator body (
2) productivity can be improved, and since the insertion hole (81) is formed in the mounting member (8), it can be accurately shaped to match the outer peripheral surface shape of the outlet pipes (4) and (5). Therefore, the outlet pipes (4) and (5) and the mounting member (8) can be reliably connected by silver brazing, and each of the outlet pipes (4) and (5) can be reliably brazed. This makes it possible to improve airtightness and prevent airtight leaks.

(Example) Hereinafter, an accumulator for a two-cylinder compressor according to the present invention will be described based on an example shown in the drawings.

The accumulator shown in Figure 1 is the main body of the two-cylinder compressor (
It is attached to the outside of the airtight container (11) of the two-cylinder compressor main body (1) and used.
1), a rotary type first compression element (13) equipped with a first cylinder (12), and a second cylinder (14).
) rotary type second compression elements (15) are disposed above and below.

Further, the accumulator body (2) of the accumulator
consists of an upper body (23A) with a top wall (21) and a bottom wall (2
These bodies (23A) and (23B) are joined by silver brazing to form a vertically long cylindrical shape, and the top wall (21) is equipped with an evaporator. An inlet pipe (not shown) that sucks low-pressure gas from
3), and two first and second outlet pipes (4) and (5), which will be described later, are inserted into the bottom wall (22), and the respective outlet pipes (4) and (5) are inserted into the bottom wall (22). ) are connected to the first cylinder (12) and the second cylinder (14), respectively.

and a bottom wall (22) of the accumulator body (2).
As shown in FIG. 2, the first and second outlet pipes (4) and (5) can be inserted into the center thereof in close contact with each other.
One through hole (24) is provided by connecting two circular holes having the same diameter as the outer diameter of the outlet pipe.

The tenth second outlet pipes (4) and (5) are inserted into the accumulator main body (2), and have their upper ends opened at the same height position in the upper part of the accumulator.
Second straight pipe section (41) (51) and each straight pipe section (41)
The straight pipe parts (41) and (51), which are inserted into the accumulator main body (2), are composed of first and second curved rod parts (42) (52) bent at right angles from the lower end of the (51). While bringing the inner insertion part into close contact with each other, each of the straight pipe parts (41) (51)
The entire length or a part of the accumulator body (2) is fixed by brazing or the like to maintain a close contact with the accumulator body (2). The area around it is fixed mainly by silver brazing.

Moreover, in the embodiment shown in FIG.
An intermediate support plate (5) is fixed in a transverse manner to support the intermediate portion of the. Specifically, as shown in FIG. 3, the intermediate support plate (5) has the first and second outlet pipes (4) in its center.
One insertion hole (el) that has an inner diameter that matches the pipe diameter of (5) and that allows the outlet pipes (4) and (5) to be inserted by press-fitting.
An annular protrusion (62) rising upward is provided on the outer peripheral edge of the insertion hole (61), while the accumulator main body (62) is provided on the outer peripheral edge of the intermediate support plate (5).
A tapered cylindrical portion (63) having an outer circumferential surface that comes into contact with the inner circumferential surface (23a) of the lower body (23B) of 2) is integrally formed downward, and the tapered cylindrical portion (63) is A retaining protrusion (64) protrudes radially outward at the lower tip.
) are continuously formed, and the accumulator body (2
) in the engagement recess (25) provided in the lower body (23B),
The engaging protrusion (64) is engaged and fixed to the accumulator body (2) in a transverse manner.

Furthermore, a baffle plate (7) for separating gas-liquid fluid from the gas-liquid mixture flowing in from the inlet pipe (3) is fixed in a transverse manner above the inside of the accumulator main body (2),
A plurality of passage holes (7) are provided on the radially outer side of the baffle plate (7).
1)... is opened, and the straight pipe portions (41) (51) of the first and second outlet pipes (4) (5) are opened through the passage hole (71).
) to prevent liquid refrigerant from flowing in from the tip.

As shown in FIG. 1, the accumulator configured as described above has the straight pipe portions ( 41) The interpolation part in (51) is in close contact,
In this state of close contact, the insertion hole (
61) and fixed in the accumulator main body (2), even if the vibrations of the compressor are transmitted to the outlet pipes (4) and (5) when the compressor is driven, The respective outlet pipes (4) and (5) act as tuning forks and do not resonate, and the tips of the respective outlet pipes (4 and 5) within the accumulator body (2) are at the same height. Therefore, it is possible to secure a sufficient effective volume of the accumulator, and the same amount of refrigerant gas is supplied from each of the outlet pipes (4) and (5) to the first and second cylinders (12) (
14) can be inhaled.

Moreover, each of the outlet pipes (4) (
5), the outlet pipes (4) and (5) are brought into close contact with each other, and the insertion hole (61) provided in the intermediate support plate (5) is assembled.
Because it is inserted into the
It can be easily assembled in the same way as a one-cylinder compressor using only two outlet pipes, and the intermediate support plate (5) allows the accumulators of each of the outlet pipes (4) and (5) to be easily assembled. It is also possible to prevent the outlet pipes (4) and (5) from collapsing within the main body (2) and from vibrating the outlet pipes (4) and (5) due to vibrations from the compressor main body (1).

In addition, since the first and second outlet pipes (4) and (5) are arranged in close contact with each other at the center of the accumulator body (2), the baffle plate (7) is radially outward. It is possible to prevent the plurality of passage holes (71) provided in the pipes from overlapping in the vertical direction with the tip openings of the straight pipe portions (41) (51) of the respective outlet pipes (4) (5). Therefore, the liquid refrigerant flowing from the inlet pipe (3) flows into each of the outlet pipes (4).
) (5).

Furthermore, in the embodiment described above, the outlet pipes (4) (5)
), but when using the intermediate support plate (8), insertion into the insertion hole (61) in the intermediate support plate (5) and insertion of the accumulator By brazing around the through hole (24) provided in the bottom wall (22) of the main body (2), the outlet pipe (
4) The close contact in (5) can be maintained.

Further, in the embodiment shown in FIG. 1, the intermediate support plate (5) is provided, but this intermediate support plate (5) is not necessarily required.

Furthermore, in the embodiment described above, the bottom wall (22) of the accumulator body (2) has the first and second outlet pipes (4) and (5) in the center thereof, as shown in FIG. one through hole with a constriction connecting two circular parts having the same diameter as the outer diameter of the outlet pipe, so that the pipes can be inserted in close contact with each other (
24), but as shown in FIG.
2) through the through hole (24) of the two said first and second outlet pipes (
4) The elongated hole is large enough to allow insertion of the outlet pipe (5) in close contact with the outlet pipe (4), as shown in FIG.
) (5) has an insertion hole (81) shaped along the outer peripheral surface of the
A plate-shaped mounting member (8) covering the through hole (24) is formed separately from the bottom wall (22), and the mounting member (8) is attached to the bottom wall (22) as shown in FIG. ) is preferable.

That is, the through hole (24) is connected to each of the outlet pipes (4) and (5).
The mounting member (8) is formed simultaneously with the press molding of the lower body (23B) as a long hole large enough to be inserted into the through hole (24B) in close contact with the through hole (24B).
), and the first and second outlet pipes (4) are attached to the mounting member (8).
) and (5) are brought into close contact with each other, one through hole (81) having a constriction is formed by connecting two circles having approximately the same diameter as the outer diameter of the outlet pipe. However,
The attachment member (8) is fixed to the bottom wall (22) at the same time as the furnace brazing when the upper body (23A) and the lower body (23B) are joined by furnace brazing. Then, use the positioning jig to attach the mounting member (8).
) is positioned so as to cover the through hole (24), and is fixed to the bottom wall (22) with silver solder at the same time as the silver solder of each body (23A) (23B).

Further, after completing the brazing of the mounting member (8) as described above, each of the outlet pipes (4) and (5) is attached to the mounting member (8).
) through the insertion hole (81) of the accumulator body (2).
and insert each of the outlet pipes (4) and (5) into the mounting member (
8) is fixed by silver brazing, which has a lower melting point than copper.

Therefore, in the above configuration, the outlet pipes (4) (5)
The insertion hole (81) has a shape that matches the outer shape of the bottom wall (
Since it is formed on the mounting member (8) which is provided separately from the mounting member (22), compared to the case where it is formed on the bottom wall (22),
It can be easily formed, and the shape of the constriction part can be formed sharply with high precision, and when silver brazing the mounting member (8) and the outlet pipes (4) and (5),
The silver brazing material can be reliably attached, improving airtightness and preventing airtight leaks.

Furthermore, since the through hole (24) provided in the bottom wall (22) is a long hole, the through hole (24) provided in the bottom wall (22) is formed at the same time as the bottom wall (22) is formed. , at the same time, which can improve productivity and reduce costs.
1), it can be formed easily and accurately as described above, and as a result, the production of the accumulator can be simplified and productivity can be improved. Since the outlet pipes (4) and (5) are brazed, reliable brazing can be performed without leakage as described above.

In the embodiment described above, the accumulator main body (2) is formed from two members, the upper body (23A) and the lower body (23B), but it may also be formed from three members: the canopy, the body, and the bottom wall. The structure of the accumulator body (2) is not limited.

(Effects of the Invention) As described above, according to the present invention, the 7 cumulator bodies (2
) The inner parts of the first and second outlet pipes (4) and (5) inserted into the interior from the bottom wall (22) of tube(
4) (5) can be prevented from resonating and vibrating like a tuning fork, reducing noise accordingly.
4) Since the heights of the openings in (5) can be made the same, a sufficient effective volume within the accumulator can be secured.
) (14) can also be made the same amount.

In addition, the first
One insertion hole (61) through which the second outlet pipe (4) (5) is inserted.
), by providing an intermediate support plate (5) with 2 outlet pipes (4) and (5), it is possible to connect the intermediate support plate (5) to the intermediate support plate (5) in the same way as in a one-cylinder compressor with one outlet pipe, while using two outlet pipes (4) and (5). The intermediate support plate (5) can be assembled.
) prevents each of the outlet pipes (4, 5) from collapsing within the accumulator body (2), and vibrations of the outlet pipes (4, 5) due to vibrations from the compressor body (1). It can also be prevented.

Further, the through hole (24) provided in the bottom wall (22) of the accumulator body (2) is connected to the two outlet pipes (4) (5).
) is formed into an elongated hole having a size that allows the holes to be inserted in close contact with each other, thereby making it possible to easily form the through hole (24) in the bottom wall (22), and also to facilitate plate-shaped attachment. A member (8) is formed separately, and the mounting member (8)
An insertion hole (81) is formed along the outer peripheral surface of the outlet pipes (4) and (5), and the mounting member (8) is attached to the bottom wall (22) so as to cover the through hole (24). Since the holes are attached, even complicated hole shapes along the outer peripheral surfaces of the outlet pipes (4) and (5) that are in close contact can be formed accurately and easily.

As a result, the production of accumulators can be simplified.
The productivity can be improved, and since the outlet pipes (4) and (5) are brazed to the mounting member (8), the airtightness of the brazing can be improved and the occurrence of airtight leakage can be prevented. It can be done.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the accumulator for a two-cylinder compressor according to the present invention, Fig. 2 is a bottom view of the accumulator main body, Fig. 3 is a plan view of an intermediate support plate installed in the accumulator main body, and Fig. 4 is a plan view of a baffle plate installed in the accumulator body, FIG. 5 is a bottom view of the accumulator body showing another embodiment of the present invention, and FIG. 6 is a plan view showing a mounting member attached to the accumulator body of FIG. FIG. 7 is a bottom view showing the accumulator body shown in FIG. 5 with the attachment member shown in FIG. 6 attached thereto, and FIGS. 8 to 10 are sectional views illustrating a conventional example. (2)...Accumulator body (22)...Bottom wall (24)...Through hole (3)...Inlet pipe (4) (5)...Outlet pipe (5 )...Intermediate support plate (61)...Insertion hole (8)...Mounting member (81)...Insertion hole

Claims (1)

[Claims] 1) An accumulator for a two-cylinder compressor comprising one inlet pipe (3) and two outlet pipes (4) and (5), the bottom wall of the accumulator body (2) (22) An accumulator for a two-cylinder compressor, characterized in that the inserted portions of the outlet pipes (4) and (5) are brought into close contact with each other and are provided with a close contact maintaining means for maintaining this close contact. 2) The accumulator body (2) is provided with an intermediate support plate (8) having one insertion hole (61) through which the two outlet pipes (4) and (5) in close contact are inserted. Accumulator for 2-cylinder compressor. 3) The through holes (24) of the outlet pipes (4) and (5) provided in the bottom wall (22) of the accumulator body (2) can be inserted with the two outlet pipes (4) and (5) in close contact with each other. The outlet pipes (4) and (5) are formed into elongated holes of a suitable size and are in close contact with each other.
), forming a plate-shaped mounting member (8) having an insertion hole (81) shaped along the outer peripheral surface of the through hole (81) and covering the through hole (24);
The accumulator for a two-cylinder compressor according to claim 1, wherein the attachment member (8) is attached to the bottom wall (22).