JP2002115660A - Assembly structure of delivery pipe for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a compressor by simplifying the assembly structure of a delivery pipe. SOLUTION: The longitudinal one end side of a delivery pipe 120 is fixedly press-fitted to a second partition member 105b forming a delivery chamber 105, and the other end side is welded so as to fill a clearance between a hole part 113 and the delivery pipe 120 with a hole part 113 provided in a second casing 112 passed therethrough. Thus, since a positional displacement can be absorbed by increasing the size of the hole part 113, a projected part for positioning can be eliminated, and the man-hour for production of a compression mechanism Cp can be reduced. Since the delivery pipe 120 is fixedly press-fitted to a second partition member 105b, a clearance between the delivery pipe 120 and the delivery chamber 105 needs not to be sealed air-tightly by an O-ring, and the number of parts of the compressor 100 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling structure of a discharge pipe for a compressor, and more particularly, to a compression for a vapor compression refrigeration cycle (supercritical refrigeration cycle) in which a high pressure side refrigerant pressure is higher than a critical pressure of the refrigerant. It is effective to apply to machines.

[0002]

2. Description of the Related Art In a hermetic compressor in which a discharge chamber is provided in a suction atmosphere in a casing, a discharge pipe penetrates the casing and is connected to the discharge chamber. It is necessary to match the position of the hole to be inserted with the position of the connection site to which the discharge pipe provided in the discharge chamber is connected.

For this reason, in the invention described in Japanese Patent Application Laid-Open No. H11-159479, the orbiting scroll and the partition member constituting the discharge chamber are formed as separate parts, and a positioning projection is provided on the end plate of the fixed scroll. On the other hand, by providing a concave portion on the side of the partition member into which the protrusion is fitted, the partition member is fixed to the fixed scroll in a state where the partition member is positioned, and the position of the hole and the position of the connection portion are matched.

The gap between the connection portion and the discharge pipe is O
It is hermetically sealed by a sealing means (sealing means) such as a ring.

[0005]

However, according to the invention described in the above publication, it is necessary to provide projections and recesses for positioning, and it is difficult to reduce the number of manufacturing steps. In addition, since the gap between the connection portion and the discharge pipe is hermetically sealed with an O-ring, it is difficult to reduce the number of parts. Therefore, with the invention described in the above publication, it is difficult to reduce the manufacturing cost of the compressor.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to reduce the manufacturing cost of a compressor by simplifying the structure for assembling a discharge pipe.

[0007]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, the discharge chamber (105) into which the compressed fluid flows is provided with a casing (11).
2) Applied to a hermetic compressor provided in the suction atmosphere in the case (2), and transfers the fluid in the discharge chamber (105) to the casing (11).
2) An assembling structure of the discharge pipe (120) leading to the outside, wherein one end of the discharge pipe (120) in the longitudinal direction is a partition member (105a, 105b) constituting the discharge chamber (105).
On the other hand, the other end of the discharge pipe (120) in the longitudinal direction is provided with a hole (1) provided in the casing (112).
13) and is welded so as to fill a gap between the hole (113) and the discharge pipe (120) while penetrating through the hole (13).

Accordingly, the size of the hole (113) is
The position of the hole (113) and the partition members (105a, 105
In the case of b), the size can be increased to a size that can absorb the deviation from the position of the connection part to which the discharge pipe (120) is connected, so that there is no need to provide a positioning projection. Therefore, the man-hour for manufacturing the compressor can be reduced.

Further, since one end of the discharge pipe (120) in the longitudinal direction is press-fitted and fixed to the partition members (105a, 105b), the discharge pipe (1) is sealed by an O-ring or the like.
20) and the discharge chamber (105) do not need to be hermetically sealed, and the number of components of the compressor can be reduced.

As described above, according to the present invention, the number of manufacturing steps and the number of parts can be reduced, so that the manufacturing cost of the compressor can be reduced.

According to the second aspect of the present invention, there is provided the compression mechanism (Cp) having the orbiting scroll (103) and the fixed scroll (102), and the fluid discharged from the compression mechanism (Cp) flows in. The discharge chamber (105) is a hermetic compressor provided in the suction atmosphere in the casing (112), and the discharge pipe (120) for guiding the fluid in the discharge chamber (105) to the outside of the casing (112). ), One end in the longitudinal direction is a partition member (105) constituting the discharge chamber (105).
a, 105b) while being press-fitted and fixed.
The other end in the longitudinal direction of 0) penetrates the hole (113) provided in the casing (112), and
3) It is characterized in that it is welded so as to fill a gap between the discharge pipe (120) and that a part of the partition members (105a, 105b) is formed integrally with the fixed scroll (102).

Thus, the size of the hole (113) is
The position of the hole (113) and the partition members (105a, 105
b), the size of the fixed scroll (10) can be increased to a size that can absorb the deviation from the position of the connection portion to which the discharge pipe (120) is connected.
There is no need to provide a positioning projection in 2). Therefore, the man-hour for manufacturing the compressor can be reduced.

Since one end in the longitudinal direction of the discharge pipe (120) is press-fitted and fixed to the partition members (105a, 105b), the discharge pipe (1) is sealed by an O-ring or the like.
20) and the discharge chamber (105) do not need to be hermetically sealed, and the number of components of the compressor can be reduced.

As described above, according to the present invention, since the number of manufacturing steps and the number of parts can be reduced, the manufacturing cost of the compressor can be reduced.

Further, since there is no need to provide a positioning projection on the fixed scroll (102), as described above,
A part of the partition member (105a) is fixed to the fixed scroll (10
2) It can be integrally formed, and the number of manufacturing steps and parts of the compressor can be reduced.

According to the third aspect of the present invention, the compressor (100) according to the second aspect of the present invention, which sucks and compresses the refrigerant, cools the refrigerant discharged from the compressor (100), and reduces the internal pressure of the refrigerant. Radiator (200) that exceeds critical pressure
And a decompressor (300) for decompressing the refrigerant flowing out of the radiator (200), and an evaporator (400) for evaporating the refrigerant decompressed by the decompressor (300).

Accordingly, the manufacturing cost of the compressor (100) can be reduced, and the manufacturing cost of the vapor compression refrigeration cycle can be reduced.

According to the fourth aspect of the present invention, the discharge chamber (105) into which the compressed fluid flows is provided in the casing (11).
2) Applied to a hermetic compressor provided in the suction atmosphere in the case (2), and transfers the fluid in the discharge chamber (105) to the casing (11).
2) A method of assembling the discharge pipe (120) leading to the outside, wherein one end of the discharge pipe (120) in the longitudinal direction is a partition member (105a, 105b) constituting the discharge chamber (105).
After the press-fitting step of press-fitting and fixing to the casing, the other end in the longitudinal direction of the discharge pipe (120) is connected to the casing (11).
With the hole (113) provided in 2) penetrating,
A welding step of welding so as to fill a gap between the hole (113) and the discharge pipe (120).

Thus, the size of the hole (113) is
The position of the hole (113) and the partition members (105a, 105
In the case of b), the size can be increased to a size that can absorb the deviation from the position of the connection part to which the discharge pipe (120) is connected, so that there is no need to provide a positioning projection. Therefore, the man-hour for manufacturing the compressor can be reduced.

Since one end of the discharge pipe (120) in the longitudinal direction is press-fitted and fixed to the partition members (105a, 105b), the discharge pipe (1) is sealed by an O-ring or the like.
20) and the discharge chamber (105) do not need to be hermetically sealed, and the number of components of the compressor can be reduced.

As described above, according to the present invention, the number of manufacturing steps and the number of parts can be reduced, so that the manufacturing cost of the compressor can be reduced.

Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
The present invention is applied to a compressor for a vapor compression refrigeration cycle (supercritical refrigeration cycle) in which the refrigerant pressure on the high pressure side is equal to or higher than the critical pressure of the refrigerant, and FIG. 1 shows an air conditioner employing the supercritical refrigeration cycle. It is a schematic diagram of an apparatus.

In FIG. 1, reference numeral 100 denotes a refrigerant (in this embodiment,
The present embodiment employs an electric compressor in which a compression mechanism that suctions and compresses refrigerant and an electric motor that drives the compression mechanism are integrated.

Reference numeral 200 denotes a radiator that exchanges heat between the refrigerant discharged from the compressor 100 and the outdoor air to cool the refrigerant and that has an internal pressure equal to or higher than the critical pressure of the refrigerant.
Reduces the pressure of the refrigerant flowing out of the radiator 200,
The radiator 200 based on the refrigerant temperature at the outlet side of the radiator 200
On the outlet side, there is a pressure reducing valve (pressure reducing device) for controlling the refrigerant pressure (the discharge pressure of the compressor 100).

400 is the air blown into the room and the pressure reducing valve 30
An evaporator that exchanges heat with a refrigerant depressurized at 0 to evaporate a low-pressure liquid-phase refrigerant to exhibit a refrigeration capacity.

Next, the compressor 100 will be described.

FIG. 2 is an enlarged cross-sectional view of the compression mechanism Cp.
This is a well-known scroll-type compression mechanism that includes a fixed scroll 102 fixed at a fixed position, an orbiting scroll 103 that orbits the fixed scroll 102, and the like.

An electric motor (not shown) for driving the orbiting scroll 103 is housed in the frame 101, and 104 is disposed on the tip side of the spiral teeth 102a and 103a of the scrolls 102 and 103. Working chamber (compression chamber) formed by both scrolls 102 and 103
This is a tip seal that seals V.

Reference numeral 105 denotes a discharge chamber into which the refrigerant (fluid) compressed by the compression mechanism Cp flows.
Reference numeral 05 denotes an annular first partition member 10 formed integrally with the end plate portion 102b of the fixed scroll 102 by die casting.
5a, a lid-like second partition member 105b for closing the opening of the first partition member 105a, and the like. The second partition member 10b is air-tightly fixed to the first partition member 105a with bolts B2 via sealing means such as packing.

Incidentally, reference numeral 106 denotes the scroll 102, 10
3 is a discharge port for communicating the working chamber V with the highest pressure and the discharge chamber 105 formed at a substantially central portion of the discharge chamber 3, and 107 is a reed valve shape for preventing the refrigerant from flowing back from the discharge chamber 105 to the working chamber V. 108 is the discharge valve 107
This is a valve stop plate (stopper) for regulating the maximum opening of the valve. The discharge valve 107 and the stopper 108 are fixed to the end plate 102b of the fixed scroll 102 with bolts B3.

Reference numeral 110 denotes a casing that houses the compression mechanism Cp, the electric motor and the frame 101. The casing 110 includes a first casing 111 that houses the electric motor and the frame 101, and a first casing 111 that houses the compression mechanism Cp. And a second casing 112 welded to the casing 111.

At this time, the refrigerant drawn into the compression mechanism Cp flows through the frame 101 (the first casing 111), cools the electric motor, and fills around the compression mechanism Cp. The discharge chamber 105 exists in the atmosphere of the suction refrigerant.

Reference numeral 120 denotes a discharge pipe for guiding the refrigerant in the discharge chamber 105 to the outside of the casing 110. One end of the discharge pipe 120 in the longitudinal direction is press-fitted and fixed to a second partition member 105b constituting the discharge chamber 105. On the other hand, the other end is welded so as to fill a gap between the hole 113 and the discharge pipe 120 while penetrating the hole 113 provided in the casing 110 (the second casing 112).

Next, a method of assembling the discharge pipe 120 will be described in the order of steps.

One end of the discharge pipe 120 in the longitudinal direction is press-fitted and fixed to the second partition member 105b (press-fitting step). afterwards,
Second partition member 105b to which discharge pipe 120 is press-fitted and fixed
Is fixed to the first partition member 105a with bolts B2 (discharge chamber forming step).

Next, the hole 113 of the second casing 112
While passing the discharge pipe 120 through the second casing 112.
After covering the first casing 111 so as to cover the compression mechanism Cp (casing assembling step), the overlapping portions of the first and second casings 111 and 112 and the gap between the hole 113 and the discharge pipe 120 are welded. Airtight joining (welding process).

Next, the features of this embodiment will be described.

According to this embodiment, one end in the longitudinal direction of the discharge pipe 120 is press-fitted and fixed to the second partition member 105b constituting the discharge chamber 105, while the other end is connected to the casing 110 (the second casing 112). Hole 11 provided in
3 is welded so as to fill the gap between the hole 113 and the discharge pipe 120, so that the size of the hole 113 is determined by the position of the hole 113 and the second partition member 105b.
Among them, the size can be increased to a size that can absorb the deviation from the position of the connection part to which the discharge pipe 120 is connected.

Accordingly, since it is not necessary to provide a positioning projection on the end plate portion 102b of the fixed scroll 102, the number of manufacturing steps of the compression mechanism Cp can be reduced.

Since one end of the discharge pipe 120 in the longitudinal direction is press-fitted and fixed to the second partition member 105b,
The discharge pipe 120 and the discharge chamber 1 are sealed by a sealing means such as an O-ring.
05 is not required to be hermetically sealed, and the number of components of the compressor 100 can be reduced.

As described above, according to the present embodiment, the number of manufacturing steps and the number of parts can be reduced, so that the manufacturing cost of the compressor 100 can be reduced.

The end plate 10 of the fixed scroll 102
Since it is not necessary to provide a positioning projection on 2b, the first partition member 105a can be formed integrally with the fixed scroll 102, and the number of manufacturing steps and the number of components of the compressor 100 can be reduced.

(Second Embodiment) In the first embodiment, the discharge pipe 120 is connected to the second partition member 105 of the discharge chamber 105.
In this embodiment, the discharge pipe 120 is press-fitted and fixed to the first partition member 105a, as shown in FIG.

(Other Embodiments) In the above-described embodiment, the compressor in which the electric motor as the drive source of the compression mechanism Cp is integrated, but the present invention is not limited to this. A drive source such as a motor or an engine may be provided separately from the compression mechanism Cp, and power may be transmitted to the compression mechanism Cp via power transmission means such as a belt or a shaft.

Further, in the above-described embodiment, the present invention has been described by taking as an example a compressor having a scroll-type compression mechanism.
The present invention is not limited to this, and can be applied to, for example, those having other types of compression mechanisms, such as a piston type, a vane type, a rotary type, and a rotasco type.

In the above embodiment, the present invention is applied to a compressor for a vapor compression refrigeration cycle. However, the present invention is not limited to this, and may be applied to other devices such as an air pump. be able to.

In the above-described embodiment, the present invention is applied to a compressor for a vapor compression refrigeration cycle using carbon dioxide as a refrigerant. However, the present invention is not limited to this. The present invention can also be applied to a vapor compression refrigeration cycle using hydrogen, nitrogen or the like as a refrigerant.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a refrigeration cycle using a compressor according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a compression mechanism Cp portion of the compressor according to the first embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a compression mechanism Cp portion of a compressor according to a second embodiment of the present invention.

[Explanation of symbols]

101: frame, 102: fixed scroll, 103:
Orbiting scroll, 105: discharge chamber, 105a: first partition member, 105b: second partition member, 111: first casing, 112: second casing, 120: discharge pipe.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25B 31/02 F25B 31/02 Z (72) Inventor Yoshiaki Harakawa 1-1-1 Showa-cho, Kariya-shi, Aichi Stock F-term in company DENSO (reference) 3H003 AA05 AB03 AC03 CD06 CE02 3H029 AA01 AA02 AA05 AA14 AA17 AB02 AB03 AB05 BB31 BB32 BB33 CC03 CC04 CC09 CC25 3H039 AA03 AA04 AA05 AA12 BB07 BB08 CC03 CC29 CC33 CC34

Claims (4)

[Claims] A discharge chamber (10) into which a compressed fluid flows.
5) is applied to a hermetic compressor provided in the suction atmosphere in the casing (112), and the fluid in the discharge chamber (105) is transferred to the casing (11).
2) An assembling structure of the discharge pipe (120) leading to the outside, wherein one end of the discharge pipe (120) in the longitudinal direction is a partition member (105a, 105) constituting the discharge chamber (105).
b). On the other hand, the other end of the discharge pipe (120) in the longitudinal direction penetrates a hole (113) provided in the casing (112), and is connected to the hole (113). An assembling structure of a discharge pipe for a compressor, which is welded so as to fill a gap with the discharge pipe (120). 2. A compression mechanism (Cp) having an orbiting scroll (103) and a fixed scroll (102).
A discharge chamber (105) into which a fluid discharged from the compression mechanism (Cp) flows is a hermetic compressor provided in a suction atmosphere in a casing (112); 105) to the casing (11).
2) One end in the longitudinal direction of the discharge pipe (120) leading to the outside is
A partition member (105a,
105b). On the other hand, the other end in the longitudinal direction of the discharge pipe (120) penetrates a hole (113) provided in the casing (112), and is connected to the hole (113). The compressor is welded so as to fill a gap with the discharge pipe (120), and a part of the partition members (105a, 105b) is formed integrally with the fixed scroll (102). 3. The compressor (100) according to claim 2, wherein the refrigerant is suction-compressed, and the refrigerant that cools the refrigerant discharged from the compressor (100) and radiates heat whose internal pressure is equal to or higher than the critical pressure of the refrigerant. An evaporator (200); a decompressor (300) for decompressing the refrigerant flowing out of the radiator (200); and an evaporator (400) for evaporating the refrigerant decompressed by the decompressor (300). A vapor compression refrigeration cycle characterized by the following. 4. A discharge chamber (10) into which a compressed fluid flows.
5) is applied to a hermetic compressor provided in the suction atmosphere in the casing (112), and the fluid in the discharge chamber (105) is transferred to the casing (11).
2) A method of assembling a discharge pipe (120) leading to the outside, wherein one end of the discharge pipe (120) in the longitudinal direction is a partition member (105a, 105) constituting the discharge chamber (105).
b) a press-fitting step of press-fitting and fixing, and after the press-fitting step is completed, the other end in the longitudinal direction of the discharge pipe (120) is passed through a hole (113) provided in the casing (112). In the hole (11)
3) A method of assembling a discharge pipe for a compressor, comprising: a welding step of welding so as to fill a gap between the discharge pipe (120) and the discharge pipe (120).