JP2013087694A - Transverse type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of pressure loss in a compressed refrigerant by reducing the oil content in refrigerant gas discharged from a gas cover and by preventing the generation of noise in outside discharge space, in a transverse type compressor.SOLUTION: A transverse type compressor 50 comprises a sealed container 1, a compression mechanism part, an electric motor part, a suction pipe 7 and a discharge pipe 13. Between the electric motor part and the discharge pipe, there is provided a partition plate 12 for partitioning the sealed container, and on the partition plate at a side opposed to the electric motor part, a gas cover 16, in which the upper and lower portions are opened, is mounted. In the upper part of the partition plate, there is formed a refrigerant gas passage hole 12a, through which compressed refrigerant gas is circulated, and in the lower part thereof, there is formed a lubricant passage hole 12b, through which a lubricant is circulated. The gas cover is formed so that the upper side thereof is smaller than an inner diameter 15s of the sealed container and in a height to cover the refrigerant gas passage hole. The gas cover is molded while being folded and formed so that its cross section is rectangle-shaped, and a gas-liquid separation mechanism comprises the partition plate and the gas cover.

Description

  The present invention relates to a horizontal compressor, and more particularly to a horizontal compressor suitable for refrigeration and air conditioning equipment.

  An example of a conventional horizontal compressor is described in Patent Document 1. In the horizontal compressor described in this publication, the refrigerant compressed by the horizontal scroll compressor flows into the motor storage space from the refrigerant discharge space, and passes through the refrigerant communication hole and the lubricating oil communication hole formed in the bearing plate. It is led to the outer discharge space. Then, the refrigerant discharged into the refrigerant discharge space blows against the suction pipe, the inner wall of the sealed case, etc., and most of the lubricating oil contained in the refrigerant is separated. Furthermore, when flowing into the discharge space outside the apparatus through the refrigerant communication hole, the lubricant oil is blown against the pipe for attaching the pipe and the lubricating oil is separated from the refrigerant.

  Another example of a conventional horizontal compressor is described in Patent Document 2. In the horizontal compressor described in this publication, an electric motor, a compression mechanism section, and a refrigeration oil storage section are formed in a sealed container in order to reduce the outflow of lubricating oil to the outside of the compressor. It is partitioned from other parts by a partition plate. The partition plate is formed with at least a lower opening for communicating with refrigeration oil, and a gas-liquid separation channel is provided on the partition plate on the side of the refrigeration oil storage portion. And this horizontal type compressor is arrange | positioned so that the compression mechanism part side may become high only 6 degrees-12 degrees from horizontal.

  Still another example of a conventional horizontal compressor is described in Patent Document 3. In the horizontal compressor described in this publication, an upper flow path opening is provided at the upper part of the bearing support plate that partitions the refrigerator oil storage section, and a gas cover is provided with an oil droplet removal section on the side surface of the refrigerator oil storage section of the bearing support plate. Is provided. Here, the gas cover is formed by attaching an oil droplet removing portion formed in a mesh shape or the like inside the annular cover, and joining the annular cover and a substantially disk-shaped base plate by brazing or the like. As a result, when the flow rate of the refrigerant increases, bubbling of the lubricating oil occurs in the lubricating oil reservoir, and the occurrence of a situation in which the amount of oil that cannot be captured by the oil droplet removing unit is contained in the refrigerant is This can be prevented by removing a part.

JP 2000-110756 A JP-A-7-208357 JP 2008-121893 A

  In the horizontal compressor described in Patent Document 1, the compressed refrigerant flowing into the motor chamber flows into the space formed by the bearing plate and the lubricating oil introduction pipe mounting plate from the refrigerant communication hole formed in the bearing plate, Thereafter, the lubricant is introduced into the discharge space outside the machine from the gap between the outer periphery of the pipe for attaching the pipe for introducing the lubricant and the sealed case. However, in the horizontal compressor described in this publication, even if it is a compressed refrigerant that has flowed from the refrigerant communication hole, it contains a large amount of lubricating oil stored inside the sealed case. If it flows into the discharge space outside the machine from the gap on the side surface without colliding with the plate, this lubricating oil will pass through without being removed.

  Furthermore, when a horizontal compressor is used for an air conditioner or the like, depending on the operating area of the compressor, the liquid level of the lubricating oil on the electric motor chamber side changes, and the electric motor chamber is more than the lubricating oil communication hole formed in the lower part of the bearing plate. There is a case where the liquid level on the side decreases and becomes a passage for the compressed refrigerant. In this case, the compressed refrigerant containing a large amount of lubricating oil flows into the discharge space outside the machine without being disturbed by the lubricating oil introduction pipe mounting plate, so that a large amount of lubricating oil contained in the compressed refrigerant is not removed. Will flow out of the horizontal compressor. As a result, the performance of the air conditioner deteriorates, the amount of lubricating oil is insufficient, or a large amount of lubricating oil needs to be supplied.

  In order to eliminate the occurrence of such problems, in the horizontal scroll compressor described in Patent Document 2, the downstream side of the compressed refrigerant flowing out from the lower opening formed in the lower part of the partition plate corresponding to the bearing plate is provided. A gas-liquid separation channel is provided to remove lubricating oil contained in the compressed refrigerant. The compressor described in this publication can surely separate the lubricating oil, so that even if it is used in an air conditioner or the like, the performance of the lubricating oil is not reduced. However, the provision of the gas-liquid separation channel may complicate the structure and increase the channel resistance, which may also reduce the performance of the air conditioning prayer.

  Furthermore, in the horizontal axis type compressor described in Patent Document 3, the compressed refrigerant flowing from the lower part of the partition plate is guided to the flow path formed by the partition plate and the gas cover, and is formed on the upper side and the side part. Since the oil is discharged from the hole to the discharge space outside the machine, the compressed oil containing the lubricating oil collides with the partition plate, so that the lubricating oil can be reliably removed. However, in the compressor described in this publication, the flow path through which the compressed refrigerant flows becomes long, and the pressure loss of the refrigerant may increase. According to the analysis of the present inventors, when compressed refrigerant flows out from the side of the upper portion of the gas cover to the outside discharge space, the compressed gas is temporarily put in a wide space on the lower side of the outside discharge space. After flowing down, it flows into a discharge pipe arranged in the upper part of the discharge space outside the machine. Therefore, a downflow and an upflow for flowing into the discharge pipe exist in the discharge space outside the apparatus, and there is a possibility that mixing and stirring loss may occur due to this. In addition, since the compressed refrigerant is at a high pressure, when the flow path of the compressed refrigerant is formed in a sealed state with the partition plate and the gas cover, if the partition plate has low rigidity, vibrations may occur, which may cause noise generation. Become.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to reduce the oil content in the refrigerant gas discharged from the gas cover and generate noise in the discharge space outside the machine in the horizontal compressor. And to prevent the occurrence of pressure loss in the compressed refrigerant. Another object of the present invention is to prevent air bubbles from entering the oil supply pipe in a horizontal compressor that achieves the above object. It is another object of the present invention to reduce manufacturing steps and costs by simplifying the structure.

  A feature of the present invention that achieves the above-described object is a sealed container, a horizontal compression mechanism disposed in the sealed container, an electric motor section that drives the compression mechanism and is disposed in the sealed container, A suction pipe that guides the refrigerant gas compressed by the compression mechanism to the sealed container; and a discharge pipe that discharges the refrigerant gas compressed by the compression mechanism to the outside of the sealed container. In the horizontal compressor, a partition plate for partitioning the sealed container is provided between the electric motor unit and the discharge pipe, and a gas cover having upper and lower parts opened to the counter motor side of the partition plate is attached. The partition plate is formed with a refrigerant gas passage hole through which the refrigerant gas compressed by the compression mechanism part flows in the upper part, and a lubricating oil passage hole through which lubricating oil circulates in the lower part. Hermetically sealed The gas cover is formed to have a height that covers the refrigerant gas passage hole, and is bent and formed into a rectangular cross section. A gas-liquid separation mechanism that separates the lubricating oil is configured, and the refrigerant gas from which the lubricating oil has been separated by the gas-liquid separation mechanism is guided from the upper side of the gas cover and the upper part of both side surfaces to the discharge pipe side. .

  In this feature, both side surfaces of the gas cover have a shape that is linearly cut obliquely downward, and a throttle portion is preferably formed at the front center of the gas cover. You may form the protrusion part which protruded in the said discharge pipe side in the front of a cover, and on the upper side and the lower side on both sides of the said throttle part. Further, the gas cover is preferably formed by forming the drawn portion by drawing at a central portion of a gas cover material formed by punching a thin plate, and then bending both sides by pressing. An oil supply pipe for supplying a lubricating liquid for lubricating the horizontal compressor is attached to the shaft end of the part, and the oil supply pipe is attached to the center of the lower side of the gas cover even if the oil supply pipe is inclined by 2 degrees from the vertical direction. It is desirable to form an oil supply pipe cover portion having a width to cover.

  According to the present invention, a gas cover is manufactured by simply bending and drawing a single thin plate, and compressed refrigerant is discharged to the upper and upper side surfaces by the gas cover and the partition plate attached to the auxiliary bearing. Since the opening that flows into the space is formed, the oil content in the refrigerant gas discharged into the refrigeration cycle can be reduced, the generation of noise in the discharge space outside the machine can be prevented, and the occurrence of pressure loss in the compressed refrigerant can be suppressed. it can. Further, it is possible to avoid the deterioration of the reliability of the sliding portion of the horizontal compressor, which can prevent the refrigerant gas bubbles from entering the oil supply pipe. Furthermore, since the gas cover can be manufactured by simply bending and drawing a single thin plate, the structure is simplified and the number of manufacturing steps and costs can be reduced.

The longitudinal cross-sectional view of one Example of the horizontal scroll compressor which concerns on this invention. The detailed longitudinal cross-sectional view of the gas cover part with which the horizontal scroll compressor shown in FIG. 1 is provided. The front view which looked at the partition plate provided in the gas cover part shown in FIG. 2 from the discharge side. The front view which looked at the gas cover with which the horizontal scroll compressor shown in FIG. 1 is provided from the discharge side, side sectional drawing, and bottom view. FIG. 4B is a perspective view of the gas cover shown in FIG. 4A. The fragmentary longitudinal cross-sectional view of the horizontal scroll compressor provided with the other Example of the gas cover which concerns on this invention. The front view which looked at the gas cover shown in FIG. 5 from the discharge side, side sectional drawing, and bottom view. FIG. 6B is a perspective view of the gas cover shown in FIG. 6A. The figure which shows the outline of the manufacturing process of a gas cover.

  Hereinafter, some embodiments of a horizontal compressor according to the present invention will be described with reference to the drawings. In the following description, the case where the horizontal compressor is a horizontal scroll compressor will be described as an example. However, the compressor is not limited to the scroll compressor, and the present invention is also applicable to other compressors such as a rotary compressor. Can be applied.

  FIG. 1 shows a horizontal compressor 50 in a longitudinal sectional view. In a scroll compressor 50 that is a horizontal compressor, a compression mechanism section and an electric motor section are housed in a cylindrical sealed container 1 whose axis extends in the horizontal direction. The compression mechanism unit is arranged on the left end side in FIG. 1 and is fixed to the fixed scroll 2 held in the hermetic container 1, and the orbiting scroll 3 formed with the wrap that meshes with the fixed scroll wrap standing on the fixed scroll 2, For turning the orbiting scroll 3 to rotate the crankshaft 5 disposed on the horizontal axis, the main bearing member 4 for rotatably supporting the crankshaft 5, and converting the eccentric rotational motion of the crankshaft 5 into the orbiting motion of the orbiting scroll 3. The Oldham ring 6 is a main component.

  The fixed scroll 2 is formed with a suction port for sucking refrigerant gas, and a suction pipe 7 for being connected to other parts of the air conditioner is press-fitted into the suction port. The suction pipe 7 penetrates the sealed container 1 and is attached to the sealed container 1 in an airtight manner.

  An electric motor part is disposed adjacent to the compression mechanism part. The electric motor section includes a rotor 9 in which a crankshaft 5 included in the compression mechanism section is press-fitted into a rotating shaft section 5a extending to the right in FIG. 1, and a rotor with a slight gap from the rotor 9. 9 and a stator arranged coaxially. The stator 8 is fixed to the sealed container 1 by shrink fitting.

An outer peripheral portion of the main bearing member 4 is fixed to the sealed container 1, and a bearing for supporting the crankshaft 5 is held on the inner peripheral side of the main bearing member 4. The orbiting scroll 3 is rotatably attached to the eccentric part of the crankshaft 5. The Oldham ring 6 is for rotating the orbiting scroll 3 without rotating with respect to the fixed scroll 2, and acts as a rotation restricting member between the orbiting scroll 3 and the main bearing member 4. The fixed scroll 2 that meshes with the orbiting scroll 3 to form a compression chamber is fastened to the main bearing member 4 with bolts 10.
A sub bearing 11 is disposed at the end of the crankshaft 5 on the side opposite to the compression mechanism, and rotatably supports the rotating shaft 5a. A partition plate 12, which will be described in detail later, is attached to the end surface of the auxiliary bearing 11 on the electric motor part side. The partition plate 12 has a bent portion 12f formed on the outer peripheral portion, and is fixed to the sealed container 1 by the bent portion 112f.

  The end of the sub-bearing 11 on the side opposite to the electric motor has a fitting structure, and a bag-like cover 19 is fitted on the inner peripheral surface. Therefore, a sealed space is formed by the cover 19, the auxiliary bearing 11, and the rotary shaft portion 5a. An L-shaped oil supply pipe 17 that allows suction of the lubricating oil 18 stored in the bottom of the sealed container 1 is attached to the end face side of the cover 19. An external discharge space 31 is formed on the right side of the cover 19 in FIG. 1 in order to store lubricating oil and to store compressed refrigerant generated in the compressor. The external discharge space 31 is formed by fitting a low-cylindrical bottom casing 15 on the right end side of the sealed container 1. A discharge pipe 13 for connecting to a four-way valve of an air conditioner is airtightly attached to the upper end surface of the bottom casing 15. Note that a gas cover 16, which will be described in detail later, is disposed adjacent to the partition plate 12 in the sub-bearing 11 portion.

  In the horizontal compressor 50 configured as described above, the power generated in the electric motor unit is transmitted to the orbiting scroll via the crankshaft 5. The orbiting scroll 3 orbits while being regulated by the Oldham ring 6 by the rotational power of the crankshaft 5. When the orbiting scroll 3 orbits, a compression chamber is formed by the orbiting scroll wrap standing on the orbiting scroll 3 and the fixed scroll wrap standing on the fixed scroll 2. The refrigerant gas is sucked from. After the refrigerant gas sucked into the fixed scroll 2 is compressed in the compression chamber, the compression mechanism part space once formed on the left end side of the sealed container 1 from the discharge hole 14 formed near the center of the fixed scroll 2. 34 flows out. Then, it passes through the gap formed between the outer peripheral side of the fixed scroll 2 and the sealed container 1, proceeds to the right side in the axial direction in the horizontal compressor 50, reaches the partition plate 12 through the motor part space 33. . As will be described later, the partition plate 12 has a refrigerant gas passage hole 12a formed in the upper portion thereof, so that the compressed refrigerant gas flows into the external discharge space 31 through the refrigerant gas passage hole 12a, The material is discharged from a discharge pipe 13 extending into the discharge space 31 to a pipe for connecting to a four-way valve or the like.

  Here, the present invention is provided with a mechanism for removing the lubricating oil from the refrigerant gas when the refrigerant gas flows through the horizontal compressor 50. Details thereof will be described with reference to FIGS. 2 to 4B. FIG. 2 is a detailed view of the vicinity of the gas cover 16 of the horizontal compressor 50, and is a longitudinal sectional view. 3 is a front view showing details of an embodiment of the partition plate 12 provided close to the gas cover 16, and FIG. 4A is a front view, a left side sectional view, and a bottom view of the embodiment of the gas cover 16. FIG. FIG. 4B is a perspective view thereof.

  As shown in FIG. 3, the partition plate 12 has a disk shape, and a bent portion 12f extending in the axial direction is formed on the outer peripheral surface portion thereof. The bent portion 12f is fitted to the inner peripheral surface 1s of the sealed container. A through hole 12 g is formed at the center of the partition plate 12, and is fitted to the side surface of the auxiliary bearing 11. Projections 12d projecting from the flat portion 12c are formed on the inner diameter side around the through-hole 12g, and the projections extend in a rectangular shape at almost three intervals on the outer peripheral side of the projection 12d. . A leg portion 12c is formed on the outer side of the rectangular protrusion. The protrusion 12d protrudes toward the electric motor side.

  A plurality of refrigerant gas passage holes 12 a are formed in the vicinity of the outer periphery of the partition plate 12 and on the upper side so that the refrigerant gas that has flowed into the motor space 33 flows into the discharge space 31 outside the machine. The refrigerant gas passage holes 12a are two in the present embodiment, and are elongated holes extending in the circumferential direction. The size and number of the refrigerant gas passage holes 12a are determined by the conditions under which the horizontal compressor 50 is used, and need not necessarily be long holes or two. In the lower part of the partition plate 12, the lubricant stored in the lower part of the external discharge space 31 formed on the right side of the partition plate 12 and the lubricant stored in the lower part of the motor part space 33 and the compressor rear space 34 are stored. A lubricating oil passage hole 12b for adjusting the pressure in each space is formed. The upper end portion of the lubricating oil passage hole 12b is substantially horizontal.

  Next, an embodiment of the gas cover 16 will be described. The gas cover 16 is formed from one thin steel plate. As shown in FIG. 4A, a mounting hole 16j for fitting to the outer peripheral surface 11s of the auxiliary bearing 11 is formed at the center. The throttle portion 16d is connected to the mounting hole 16j, and the rigidity of the mounting hole 16j is ensured.

  The upper side 16k, which is the upper end portion of the gas cover 16, has an arc shape concentric with the mounting hole 16j. Both the left and right sides of the upper side 16k are linearly cut downward from the arc shape, and form a refrigerant gas discharge hole edge 16g described later. The lower end portion of the gas cover 16 has a linear shape having a portion protruding from the central portion, and forms a gas cover lower side 16m. The protrusion at the center of the lower side 16m is an oil supply pipe cover portion 16f for preventing the refrigerant gas from being sucked into the oil supply pipe 17 located on the right side of the gas cover 16. Therefore, the lower end of the oil supply pipe cover portion 16f extends to the extent that the lower end of the oil supply pipe 17 is hidden when viewed from the shaft end side of the rotating shaft portion 5a when assembled. Further, the width of the oil supply pipe cover portion 16f is such that the oil supply pipe 17 is hidden when viewed from the shaft end side of the rotary shaft portion 5a even if the oil supply vip 17 is inclined about 2 degrees from the vertical direction. A portion having the gas cover upper side 16b and the gas cover lower side 16m as end portions and having a mounting hole 16j in the center forms a flat surface 16b.

  The left and right sides of the lower side 16m of the gas cover have a shape that is linearly cut obliquely upward to form a lubricating oil circulation hole edge 16h. The portion where the upper end is the refrigerant gas discharge hole edge 16g and the lower end is the lubricating oil circulation hole edge 16h is a plane bent slightly 90 degrees from the flat surface 16b, and forms an inclined surface 16e. The inclined surface 16e is a support for ensuring the rigidity of the flat surface 16b. On both end sides of the inclined surface 16e, a fixed portion 16c that is rectangular and is bent so as to be parallel to the flat surface 16b is formed. The fixing portion 16c is used to weld and fix the gas cover 16 to the partition plate 12.

  Since the gas cover 16 is formed in this way, the gas cover 16 and the partition plate 12 form a cylinder having a quadrangular cross section to form a gas-liquid separation space 32. The upper and lower portions of the cylinder are open, and the side portions are also formed with openings near the upper end and the lower end. Here, the outer diameter of the upper side 16k of the gas cover 16 is slightly smaller than the inner diameter of the inner peripheral surface 15s of the bottom casing 15. Therefore, a gap is formed between the inner peripheral surface 15s of the bottom casing and the gas cover upper side 16k. The outer diameter of the gas cover upper side 16k is larger than the maximum radius position of the refrigerant gas passage hole 12a formed in the partition plate 12. In other words, the refrigerant gas containing the lubricating oil that has passed through the refrigerant gas passage hole 12a of the partition plate 12 is a radial position that prevents the refrigerant gas from flowing into the external discharge space without hitting the gas cover 16.

  When the horizontal compressor includes the gas cover 16 and the partition plate 12 of the present embodiment configured as described above, the lubricating oil level 18s in the motor section space 33 is higher than the upper end position of the lubricating oil passage hole 12b. The compressed refrigerant generated by being compressed by the compression mechanism part flows into the gas cover 16 side from the refrigerant gas passage hole 12a formed in the partition plate 12, and a part of the inner peripheral surface 15s of the bottom casing 15 and the upper side of the gas cover It flows into the external discharge space 31 horizontally through the gap of 16k substantially in the axial direction (right direction in FIG. 5). The remaining compressed refrigerant once flows out from the gap between the inner peripheral surface of the bottom casing 15 and the refrigerant gas discharge hole edge 16g of the gas cover 16 in the direction perpendicular to the axis (perpendicular to the plane of FIG. 5), and then discharged outside the machine. It flows into the lower side of the space 31.

  Here, the refrigerant gas that flows into the gas-liquid separation space 32 and flows out in the axial direction from the gap on the outer diameter side from the gas cover upper side 16k is a light gas having a relatively small amount of lubricating oil, and collides with the gas cover 16. Even if not, it is a gas from which the lubricating oil has been removed. On the other hand, almost all of the refrigerant gas flowing into the gas-liquid separation space 32 and flowing out from the gap above the refrigerant gas discharge hole edge 16g collides with the gas cover 16 at least when the flow direction is changed. The lubricating oil is removed. Of course, it often collides with the flat portion 16b of the gas cover 16 before changing the flow direction.

  When the lubricating liquid level 18s stored in the motor unit space is lower than the upper end portion of the lubricating oil passage hole 12b, the compressed refrigerant gas also flows into the gas-liquid separation space 32 from the lubricating oil passage hole 12b. In a state where the lubricating oil passage hole 12b is open to the refrigerant gas, the lubricating oil liquid surface 18s is often foamed and the refrigerant gas is likely to contain a large amount of lubricating oil. However, in such a case, the refrigerant gas collides with the gas cover 16 when rising in the gas-liquid separation space 32. Alternatively, the flow direction can be changed when the refrigerant flows out from the gap above the refrigerant gas discharge hole edge 16g into the discharge space 31 outside the apparatus, so that the oil collides with the gas cover 16 and the lubricating oil is removed from the refrigerant gas. .

  In addition, when lubricating oil moves from the motor part space 33 to the gas-liquid separation space 32 through the lubricating oil passage hole 12b, refrigerant gas may be contained in this lubricating oil. However, since the lubricating oil containing the refrigerant gas collides with the flat surface 16b of the gas cover 16 when flowing into the gas-liquid separation space 32, the refrigerant gas is separated into bubbles and rises in the gas-liquid separation space 32. It can be prevented that the refrigerant gas is sucked into the oil supply pipe 17 and the lubrication performance is deteriorated.

  In the present embodiment, since the gas cover is composed of a single thin plate, there is a concern that the refrigerant gas may collide with the flat surface 16b and vibrate to generate noise. However, the gas cover 16 has a bent structure and is inclined. Since the rigidity of the gas cover 16 is enhanced by the surface 16e and the throttle part d at the center, the generation of noise can be reduced as much as possible.

  An embodiment in which the rigidity of the gas cover is further increased to reduce noise generation will be described with reference to FIGS. FIG. 5 is a view corresponding to FIG. 2, and is a vertical partial cross-sectional view of the horizontal compressor 50 including the gas cover 26. FIG. 6A is a front view, a left side sectional view, and a bottom view of the gas cover 26. FIG. 6B is a perspective view of a gas-liquid separation mechanism constituted by the gas cover 26 and the partition plate 12. The present embodiment is different from the above embodiment in that irregularities are formed on the flat portion 26b of the gas cover 26. Other portions of the gas cover 26 and the partition plate 12 are the same as in the above embodiment.

  As shown in FIG. 6A, in the gas cover 26, a mounting hole 26j to the auxiliary bearing 11 is formed at the center, and a throttle portion 26d is formed around the mounting hole 26j in order to increase rigidity. An upper protrusion 26p and a lower protrusion 26q are formed on the upper and lower portions of the flat surface 26b with the mounting hole 26j interposed therebetween, respectively, protruding toward the external discharge space 31 side. In this embodiment, the upper protrusion 26p is an arc-shaped protrusion corresponding to the upper side of the flat surface 26b, and the lower protrusion 26q is a linear protrusion corresponding to the lower side of the flat surface 26b.

  An oil supply pipe prevention cover portion 26f that prevents the refrigerant gas from flowing into the oil supply pipe 17 is formed at the center of the lower side of the flat surface 26b. Inclined portions 26e are formed on the left and right sides of the flat surface 26b to improve the rigidity of the gas cover 26. Legs 26c for welding and fixing to the partition plate 12 are bent at both ends of the inclined portion 26e. The inner peripheral surface 26s of the mounting hole 26j is used for positioning for mounting to the auxiliary bearing 11.

  When the gas-liquid separation mechanism is configured by using the gas cover 26 shown in the present embodiment, as shown in FIG. 6B, a part of the refrigerant gas flowing into the gas-liquid separation space 32 from the motor section space 33 is gas. From the space between the upper side of the flat surface 26 b of the cover 26 and the inner peripheral surface 15 s of the bottom casing 15, it flows into the external discharge space 31 as indicated by the white arrow. The other refrigerant gas flows downward into the external discharge space 31 as indicated by a white arrow from a gap formed at the upper part of the inclined portion 26e formed on the left and right of the flat surface 26b. In addition, the refrigerant gas that has been gas-liquid separated through the lubricating oil passage hole 12b formed in the lower part of the partition plate 12 is indicated by a hollow arrow mainly from the gap formed above the inclined portion 26e to the outside discharge space 31. So that it flows downward.

  Although the gas-liquid separation is realized by the flow of the refrigerant gas, at this time, the refrigerant gas containing the lubricating oil collides with the flat portion 26b and the inclined portion 27e, which causes vibration and noise. However, according to the present embodiment, the rigidity of the gas cover 26 is improved by the formation of the inclined portion 26e and the throttle portion 26d, and the upper protrusion 26p and the lower protrusion 26q are further formed to suppress the in-plane vibration of the flat surface. Therefore, noise can be reduced.

  FIG. 7 shows an example of a method for producing a gas cover used in the above embodiment. A gas cover material 160 is punched out from a steel material plate 161 having a thickness of about 1 mm with an inner diameter 160c slightly smaller than the inner diameter of the bottom casing 15 by a press. In this punching, the shape of the inclined part, the leg part, the oil supply pipe cover part, and the central through-hole part 160a are simultaneously punched.

  Next, using the punch 171 and the die 172, the narrowed portion 170a is formed in the center portion (shown in the cross section XX in the left figure). The punch 171 is formed with a protruding narrow portion 171b corresponding to the shape of the punch main body and the narrowed portion 170a. In the die 172, a constricted portion 172b is formed at the center of the die body 172a, and the constricted portion 170a is formed by pressing the punch 171 against a flat gas cover (intermediate product) 170 with a load FA.

  Finally, the gas cover (finished product) 180 is formed by bending the left and right sides of the gas cover (intermediate product) 180a in which only the throttle portion 170a is formed in two stages using the punch 181 and the die 182. In this bending process, the punch body 181a is formed with an inclined surface 181b and a flat surface 181c corresponding to the bent shape, and the die 182 is provided with a gas cover at the center in addition to the inclined surface 182c and flat surface 182b according to the bent shape. A diaphragm 182a that receives 180 diaphragms is formed.

  As shown in FIG. 7, a gas cover with increased rigidity can be obtained simply by bending a single thin plate by drawing and pressing. In addition, since the thin plate is used as a material, handling properties are improved and an increase in the size of the gas-liquid separation mechanism can be prevented. Furthermore, welding work with the partition plate is facilitated. Therefore, the production of the gas cover is facilitated, the number of production steps is reduced, and the economic effect is enhanced.

  DESCRIPTION OF SYMBOLS 1 ... Sealed container, 1s ... Sealing container inner peripheral surface, 2 ... Fixed scroll, 3 ... Orbiting scroll, 4 ... Main bearing member, 5 ... Crankshaft, 5a ... Rotary shaft part, 6 ... Oldham ring, 7 ... Suction pipe, DESCRIPTION OF SYMBOLS 8 ... Stator, 9 ... Rotor, 10 ... Bolt, 11 ... Sub bearing, 11s ... Sub-bearing outer peripheral surface, 12 ... Partition plate, 12a ... Refrigerant gas passage hole, 12b ... Lubricating oil passage hole, 12c ... Flat part, 12d ... Projection, 12e ... Leg part, 12f ... Bending part, 12g ... Through hole, 13 ... Discharge pipe, 14 ... Discharge hole, 15 ... Bottom casing, 15s ... Inner peripheral surface of bottom casing, 16 ... Gas cover, 16b ... Flat surface, 16c ... fixed part, 16d ... throttle part, 16e ... inclined surface, 16f ... oil supply pipe cover part, 16g ... refrigerant gas discharge hole edge, 16h ... lubricant oil circulation hole edge, 16j ... mounting hole, 16k ... gas cover Upper side, 16m ... Lower side of cover, 16s ... inner peripheral surface of mounting hole, 17 ... oil supply pipe, 18 ... lubricating oil, 18s ... (lubricating oil) liquid level, 19 ... cover, 26 ... gas cover, 26b ... flat part, 26c ... leg part, 26d ... Throttle part, 26e ... inclined part, 26f ... oil supply pipe cover part, 26j ... mounting hole, 26p ... upper projection part, 26q ... lower projection part, 26s ... inner peripheral surface of mounting hole, 31 ... discharge space outside machine, 32 ... gas-liquid Separation space 33 ... Electric motor space 34 ... Compression mechanism space 50 ... Horizontal compressor 160 ... Gas cover material 160a ... Through hole 160b ... Refueling pipe cover 160c ... Gas cover outer circumference circle 161 ... Material plate, 170 ... Gas cover (intermediate product), 170a ... Drawing part, 171 ... Punch, 171a ... Punch body, 171b ... Drawing part, 172 ... Die, 172a ... Die body, 172b ... Drawing part, 18 DESCRIPTION OF SYMBOLS 0 ... Gas cover, 180a ... Gas cover (intermediate product), 181 ... Punch, 181a ... Punch main body, 181b ... Inclined surface, 181c ... Flat surface, 182 ... Die, 182a ... Drawing part, 182b ... Flat surface, 182c ... Inclined surface.

Claims (5)

An airtight container, an abscissa compression mechanism portion disposed in the airtight container, an electric motor portion that drives the compression mechanism portion and is disposed in the airtight container, and the refrigerant gas compressed by the compression mechanism portion is In a horizontal compressor that includes a suction pipe that leads to a sealed container, and a discharge pipe that discharges the refrigerant gas compressed by the compression mechanism unit to the outside of the sealed container, and stores lubricating oil in a lower portion of the sealed container,
A partition plate for partitioning the sealed container is provided between the motor unit and the discharge pipe, and a gas cover having an upper portion and a lower portion opened is attached to the counter motor portion side of the partition plate, and the partition plate is compressed above the partition plate. The refrigerant gas passage hole through which the refrigerant gas compressed by the mechanism part flows is formed with a lubricating oil passage hole through which the lubricating oil flows, and the upper side of the gas cover is smaller than the inner diameter of the hermetic container and The gas cover is formed at a height that covers the refrigerant gas passage hole, and the gas cover is bent and formed into a rectangular cross-section. The gas and the gas cover separate the lubricating oil from the refrigerant by the partition plate and the gas cover. A horizontal type comprising a liquid separation mechanism, wherein the refrigerant gas from which the lubricating oil has been separated by the gas-liquid separation mechanism is guided from the upper side of the gas cover and the upper part of both side surfaces to the discharge pipe side Compressor.   2. The gas cover according to claim 1, wherein both side surfaces of the gas cover have a shape that is linearly cut obliquely downward, and a throttle portion is formed at a front center portion of the gas cover. Horizontal compressor.   3. The horizontal compressor according to claim 2, wherein protrusions protruding toward the discharge pipe are formed on the front side of the gas cover and on the upper side and the lower side with the throttle portion interposed therebetween.   The gas cover is formed by forming the drawn portion by drawing at a central portion of a gas cover material formed by punching a thin plate, and then bending both sides by pressing. Or the horizontal compressor according to 3.   An oil supply pipe for supplying a lubricating liquid for lubricating the horizontal compressor is attached to the shaft end of the electric motor part, and this oil supply pipe is attached to the center of the lower side of the gas cover at an angle of 2 degrees from the vertical direction. The horizontal compressor according to any one of claims 1 to 4, wherein an oil supply pipe cover portion having a width covering the pipe is formed.

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