JPH02294591A - Horizontal type rotary compressor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial use distribution]

The present invention relates to a horizontal rotary pressure wJ machine for refrigeration and air conditioning, and more particularly to a compressor with an improved flow path for high-pressure refrigerant gas discharged into a closed container.

[Conventional technology]

Conventionally, it was a horizontal rotary pressure l'Iil machine, and it was developed in 1988.
There were those shown in Japanese Utility Model Publication No. 47589 and Japanese Utility Model Application Laid-open No. 63-7888. FIG. 16 is a longitudinal sectional view of the former compressor shown in Japanese Utility Model Application Publication No. Sho 63-147589. In FIG. 16, reference numeral 1 denotes a closed container, in which an electric element 2 and a compression element 3 are housed, and these are connected by a horizontal rotating shaft 4. The electric element 2 is composed of a stator 5 and a rotor 6. The stator 5 is provided with a stator core 5a and stator coils 5b protruding to the left and right of the stator core 5a.
One end of the rotating shaft 4 is fitted and fixed to the. In the compression element 3, left and right bearings 8 and 9 are fixed to both end surfaces of the cylinder 7, a compression chamber 10 is formed inside the cylinder 7 and the bearings 8 and 9, and the rotation shaft is attached to the bearings 8 and 9. 4 is pivotally supported, and a rolling piston 11 is fitted into an eccentric portion provided inside the compression chamber 10 of the rotating shaft 4.
A vane 12 is supported by the cylinder 7 and is always in pressure contact with the outer peripheral surface of the vane 1 . Also, the electric element 3 side, that is, the right bearing 9
A discharge muffler 13 is fixed to the chamber, and the discharge muffler 13 communicates with the compression chamber 10 through a discharge hole through a discharge valve (not shown), and the discharge port 14 of the discharge gas faces the rotor 6 of the electric element 2, and the discharge muffler 13 communicates with the compression chamber 10 through a discharge valve (not shown) and a discharge hole. It opens into a central space 15 formed between the electric element 2 and the compression element 3 in the compressor 1 . A discharge pipe 17 is connected to the left space 16 formed at the end of the compression element 3 in the sealed volume Wjl, and a right space 18 is also formed at the end of the electric element 2 in the sealed volume @1. The space 18 and the central space 15 are connected to the stator core 5 of the electric element 2.
It is communicated by a discharge gas flow path 19 formed in the external part a, and lubricant ii+20 is stored at the bottom of the closed container 1. Next, the operation of this horizontal rotary compressor will be explained. By driving the electric element 2 and rotating its rotor 6, the rotating shaft 4 rotates, the rolling piston 11 rotates eccentrically within the compression chamber 10, and refrigerant flows into the compression chamber 10 from a suction port (not shown). Gas is sucked in and compressed to high pressure. This gas is guided into the discharge muffler 13 through the discharge hole when the discharge valve is opened, and then discharged from the discharge port 14 to the inner peripheral side portion of the stator coil 5b in the central space 15. The high-pressure discharge gas discharged into this part passes through the gap 21 between the stator 5 and rotor 6 of the electric element 3 and enters the space 18 on the right side, and from this space 18 the discharge gas provided in the stator 5 The gas passes through the gas flow path 19 and is guided to the space 16 on the left side via the outer peripheral side of the stator coil 5b in the central space 15. Further, the discharged gas is guided from the space 16 through the discharge port 17 to a refrigerant circuit device provided outside the sealed volume Nl. The pressure at each part of the fl path of the discharged gas is the pressure inside the discharge muffler 13, P,
Assuming that the pressure at the inner peripheral side of the central space 15 is P2, the pressure at the right side space 18 is P3, the pressure at the outer peripheral side of the central space 15 is P4, and the pressure at the left side space 16 is P5, P
+ > P 2 > P 3 > P 4 > P. FIG. 17 is a longitudinal sectional view of the latter compressor shown in Japanese Utility Model Application Publication No. 63-17888, and FIGS. 18 and 19 are a front view and a longitudinal sectional view of the right bearing shown in FIG. 17. In FIG. 17, the same symbols as in FIG. 16 indicate the same or corresponding parts, and the discharge muffler 13 is fixed to the left bearing 8, and the discharge muffler 13 is fixed to the left bearing 8.
3 communicates with the compression chamber 10 through a discharge hole 23 via a discharge valve 22, and also extends in a straight line through the flange of the left bearing 8, the cylinder 7, and the flange of the right bearing 9.
4 is connected to the discharge muffler 13, and the discharge port 14 provided at the other end of the discharge gas passage 24 is connected to the central space 15.
The stator coil 5b is connected to the inner circumferential portion of the stator coil 5b. The configuration of this horizontal rotary compressor other than that described above is the same as that shown in FIG. 16. In addition, the operation of this conventional horizontal rotary compressor is as follows:
Although it is similar to that shown in the figure, the refrigerant gas compressed in the compression chamber 10 by the rotation of the rotary shaft 4 pushes open the discharge valve 22 and is guided from the discharge hole 23 to the discharge muffler 13, and then flows through the discharge gas passage 24. Then, it is guided from the discharge port 14 to the inner peripheral side of the stator coil 5b in the central space 15 of the closed container 1.

[Problem to be solved by the invention]

A conventional horizontal rotary compressor is configured as described above.
The discharge port provided in the bearing on the discharge muffler or compression element side opened on the inner circumferential side of the stator coil, and the bearing on the discharge muffler or compression element side was separated from the end of the stator coil on the electric element side. The high-pressure refrigerant gas discharged from the outlet is only partially guided through the gap between the stator and rotor of the electric element into the space at the end of the electric element side in the sealed container, and the refrigerant gas is discharged from the outlet. The other part of the gas flows into the space at the end of the compression element inside the sealed container, and as a result, the electric element cannot be sufficiently cooled by the discharged gas discharged from the discharge port, and the temperature of the electric element increases. There was a problem in that it rose while driving. This invention was made to solve the above-mentioned problems.The electric element can be sufficiently cooled by the gas discharged from the discharge port of the compression element, and the temperature rise of the electric element can be reliably prevented. The aim is to obtain a stationary rotary compressor.

[Means to solve the problem]

The horizontal rotary compressor according to the present invention has a discharge port for compressed refrigerant gas opened in the discharge muffler of the compression element or the outer periphery of the electric element side end bearing, and this discharge port is connected to the stator coil of the electric element. It is arranged so as to face the outer circumferential side of the electric element and to be close to the stator of the electric element.

[Effect]

In the horizontal rotary pressure wl machine according to the present invention, when the refrigerant gas compressed in the compression chamber is discharged from the discharge port, most of the discharged gas is transferred to the stator because the discharge port is close to the stator. Since the discharge gas is opposed to the outer circumferential side of the coil, it is guided to the discharge gas passage provided on the outer circumference of the stator core, and only slightly flows to the inner circumferential side of the stator coil. For this reason, most of the discharged gas is guided into the discharge gas flow path and the space at the end of the electric element side in the sealed fold, and is directed to the inner peripheral side of the stator, such as the gap between the stator and rotor of the electric element. From there, it is guided to the inner peripheral side of the stator coil in the central space inside the closed container, and further led to the outside of the closed container through the space at the end of the compression element inside the closed container. Therefore, the electric element can be sufficiently cooled by the refrigerant gas discharged from the discharge port.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment. In these figures, the same reference numerals as in FIGS. 16 and 17 indicate the same or corresponding parts, and 25 indicates the inside of the discharge muffler 13 on the outer peripheral side 1.
This is a separator that partitions into two chambers, 3a and inner peripheral side portion 13b. The discharge muffler 13 is fitted and fixed to the right bearing 9, and is configured such that the refrigerant gas compressed from the compression chamber 10 is discharged from the compression chamber 10 to the outer circumference side portion 13a through a discharge valve, and the outer circumference side portion 13a of the discharge muffler 14 A discharge port 14 is opened at the top of the tube. The discharge port 14 is connected to the stator coil 5 of the electric element 2.
Discharged gas flow consisting of a cut hole or a hole provided on the outer circumference of the stator core 5a, which is closer to the outer circumference than b! IIj
It is arranged opposite to 19. Note that the peripheral wall of the discharge port 14 is slightly protruded toward the side opposite to the stator core 5a. The inner circumferential side portion 13b of the discharge muffler 13 is made to protrude toward the stator 5 side from the outer circumferential side portion 13a, and a communication gas hole 26 is opened facing the stator 5. Further, 27 is a connecting gas flow path, and one end of the connecting gas flow path 27 is connected to the discharge muffler 1.
3, and the right bearing 9 and the cylinder 7
It passes through the left bearing 8 in a straight line through a hole or a notch, and the other end communicates with the compression element 3 side end in the hermetic enclosure 1, that is, the left space 16. Note that when the left bearing 8 is small, the communication gas flow path 27 can be communicated with the left space 16 without providing the left bearing 8lζ. Also,
The structure of this first embodiment other than that described above is the same as the conventional one shown in FIG. Next, the operation of the first embodiment will be explained. electric element 2
As the rotary shaft 4 rotates together with the rotor 6, refrigerant gas is drawn into the compression chamber 10 from outside the closed container 1 and compressed to a high pressure. This compressed gas is discharged to the outer peripheral portion 13g of the discharge muffler 13 by opening a discharge valve (not shown). Further, as shown by the arrows in FIGS. 1 and 3, this discharged gas is transferred from the discharge port 14 to the fixed central space l5 formed between the electric element 2 and the compression element 3 in the closed chamber bud 1. The child coil 5b is provided on the outer periphery of the stator core 5a and guided to the discharge gas passage 19 through the outer periphery of the child coil 5b. In this case, the discharge port 14 faces the discharge gas flow #i19, and the inner circumferential side 13b of the discharge muffler 13 and the stator coil 5b are narrow in the radial direction of the closed container 1. Since they are arranged so as to overlap with each other at intervals, the discharged gas from the discharge port 14 hardly leaks to the inner circumferential side of the stator coil 5b in the central space 15, and most of it is smoothly guided to the discharged gas flow path 19. . The discharged gas guided by this flow 19 is
It enters the space 18 on the right side, and from this space 18 the stator 5
and the rotor 6, the inner peripheral side portion of the stator coil 5b in the central space 15, the communication gas hole 26 of the discharge muffler 3,
Inner peripheral side portion 13a1 of discharge muffler 13 connecting gas flow path 27
The refrigerant is guided to the left space 16 through the discharge pipe 17, and then to the refrigerant circuit 43M provided outside the closed container 1. Therefore, the discharged gas from the discharge 77ra 13 flows around the stator 5 of the ri dynamic element 2 in a substantially WIU-shaped cross section, and the pressure P2 at the inner circumferential side of the central space 15 changes from the pressure at the outer circumferential side. P4 and P9 also become clearly smaller, and the discharged gas is not short-circuited from between the electric element 2 and the compression element 3 to the space l6 on the left side, and the electric element 2 can be sufficiently cooled by the discharged gas. Further, since the discharged gas smoothly flows to the left space 16 without being accumulated between the rotor 6 and the compression element 3, the rotor 6 is pushed to the side opposite to the compression element 3.
The problems shown in the figure can be resolved. 6 to 8 show a second embodiment. In these figures, the same reference numerals as in FIGS. 16 and 17 indicate the same or equivalent parts, 24a and 24b are the left bearing 8, the cylinder 7{ζ is a gas hole formed in a straight line, and 24c is the right bearing 9.
The gas hole 24a is formed in a substantially anti-two shape.
, 24b, 24C, the discharge muffler 13 and the discharge p14
A discharge gas passage 24 is configured to communicate with the. The discharge port 14 provided in the right bearing 9 of the discharge gas passage 24 is opened at the upper part 1ζ on the outer circumference side of the central space l5, is close to the upper part on the outer circumference side of the stator coil 5b of the electric element 2, and is close to the upper part on the outer circumference side of the stator coil 5b of the electric element 2. It is arranged to face the discharge gas flow path 19 provided on the outer circumferential portion of 5a. Note that the above-mentioned t of this second embodiment
The configuration other than that is the same as the conventional one shown in FIGS. 16 to 18.4 Next, the operation of the second embodiment will be explained. The rotor 6 and the rotating shaft 4 are rotated by the drive of the electric element 2, and the refrigerant gas is compressed in the compression chamber 10. The compressed gas pushes open the discharge valve 22 and is discharged to the discharge muffler 13.
From the discharge port 14 through the discharge gas passage 24 to the central space 15
is discharged from the stator coil 5b to the upper part of the outer circumferential side. Since the discharge port 14 opens outward from the stator coil 5b, a small portion of the discharged gas flows toward the inner circumference from the stator coil 5b in the central space 15, as shown by the arrow in FIG. Most of the gas just flows through the discharge gas passage 19 provided at the upper part of the outer circumference of the stator core 5a and is led to the space 18 on the right side. The discharged gas guided to this space 18 passes through the gap 21 between the stator 5 and the rotor 6, and most of it enters the inner circumference side of the stator coil 5b in the central space Is, and a part of it is fixed. It enters the central space 15 through another notch provided on the outer periphery of the child core 5a. As described above, the discharged gas from the discharge port 14 passes through the discharged gas passages 19, gaps 21, etc. provided at various locations on the electric element 2, so that each part of the electric element 2 is sufficiently supplied with the discharged gas. cooled down. The discharged gas other than the upper part, such as the discharged gas that entered the inner part of the fixed coil 5b of the central space 15, is led to the left side space 16, and further passes through the discharge pipe 17 to the refrigerant circuit outside the closed container 1. be guided. 9 to 11 show a third embodiment. In these figures, the same reference numerals as in FIGS. 6 to 8, 16, and 17 indicate the same or corresponding parts. In the third embodiment, a rightward protrusion 9 is provided on the upper part of the right bearing 9.
This protrusion 9a is inserted between the closed container 1 and the stator coil 5b, and a discharge port 1 is formed on the tip surface of the protrusion 9a.
4, the discharge port 14 is brought closer to the discharge gas flow path 19 provided on the outer periphery of the stator core 5a. In the third embodiment, the gas discharged from the discharge port 14 enters the discharge gas passage 19 more smoothly than in the second embodiment, and is less likely to be diverted to the inner peripheral side of the stator filter 5b in the central space 15. Therefore, the cooling effect of the electric element 2 is enhanced, and the electric element 2 is easily increased in bending power. 12 and 13 show a modified example of the bearing 9 on the electric element side (right side) of the compression element. This bearing 9 has a discharge hole 23 and a discharge valve 22, and a partition plate 28 is fitted into An annular discharge gas passage 24 is formed surrounded by the bearing 9 and the cutting plate 28, and the discharge port 14 is formed in an arc shape along the outer periphery of the partition plate 28. By using this bearing 9, it is not necessary to provide a discharge hole, a discharge valve, and a discharge muffler in the bearing on the side opposite to the electric element. In this case, the flow of refrigerant discharged from the compression chamber is as shown by the arrows in FIG. 13. FIGS. 14 and 15 show another modification of the bearing on the electric element side (right side) of the compression element, and this bearing 9 has a protruding portion 9a protruding in a front arc shape other than the lower part of the outer circumference, and has a plurality of The gas hole 24c is provided with a gas hole 24c and a discharge port 14. The gas hole 24c is branched from the discharge side of the discharge muffler and connected to form a discharge gas passage. The bearings shown in FIGS. 12 and 13 are the second embodiment,
The bearings shown in FIGS. 14 and 15 are used in place of the bearing on the right side of the third embodiment, respectively.

【Effect of the invention】

As explained above, according to the present invention, the electric current of the compression element
The discharge port opening on the outer periphery of the bearing on the III element side or the discharge muffler provided in this bearing is arranged so as to face the outer periphery side of the stator coil of the electric RIH element and to be close to the stator of the RIH element. As a result, most of the refrigerant gas compressed in the compression chamber is passed through the discharge gas flow path provided on the outer periphery of the stator core of the moving element to the inside of the closed container. ft into the space at the end of the moving element side, and from this space, from the inner circumference of the stator, such as the gap between the stator and rotor of the electric element, the inner periphery of the stator coil in the central space in the sealed mortar. Therefore, the electric element can be sufficiently cooled by the refrigerant gas discharged from the discharge port, and the temperature of the electric element can be reliably prevented from rising.

[Brief explanation of the drawing]

FIG. 1 shows a horizontal rotary pressure w according to a first embodiment of the present invention.
Fig. 2 is a cross-sectional view of the external appearance of the first embodiment; Fig. 3 is a longitudinal sectional view taken along line A-A in Fig. 2 at a different position from Fig. 1; Fig. 4; 5 is a front view showing the discharge muffler of the first embodiment, FIG. 5 is a sectional view taken along the line B-B in FIG. 4, and FIG. 6 is a longitudinal section showing a horizontal rotary compressor according to the second embodiment of the present invention. Figures 7 and 7 show the electric power of the second embodiment. 8 is a c-cm sectional view of FIG. 7; FIG. 9 is a vertical sectional view of the fJjl stationary rotary pressure PMm according to the third embodiment of the present invention; FIG. 10 is a front view showing the lI element side bearing; 11 is a sectional view taken along the line DD in FIG. 10, and FIG. 12 is a front view showing a modified example of the electric element side bearing of the present invention. , FIG. 13 is a sectional view taken along line E-E in FIG. 12,
Fig. 14 is a front view showing another modification of the electric element side bearing of the present invention, Fig. 15 is a sectional view taken along F-Fi@ of Fig. 14, and Fig. 16 is an example of a conventional mechanical rotary compressor. 17 is a vertical sectional view showing another example of a conventional horizontal rotary compressor, FIG. 18 is a front view showing the electric element side bearing of FIG. 17, and FIG. It is a sectional view taken along the line GG in the figure. 3 Compression element, stator core, 5 7 cylinder, 1... Rolling muffler, 1 16, 18... Empty sealing bud, 2... Electric element, - Rotating shaft, 5 Stator, 5a, Stator Coil, 6 rotor) 9. Bearing, 10. Compression chamber, 1 ton, 12 Pane, 13 Discharge port, 15 Central space, Intersection, 19 Discharged gas flow path, 21. Gap, 24 Discharged gas passage. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An electric element and a compression element are connected by a horizontal rotating shaft and housed in a closed container, bearings are fixed to both ends of the cylinder of the compression element to form a compression chamber in the cylinder, and the rotation of the rotating shaft is The refrigerant gas compressed in the compression chamber is discharged from the compression element into a central space provided between the electric element and the compression element in the sealed container, and the discharged gas is transferred to an end on the side of the compression element in the sealed container. In a horizontal rotary compressor, the discharge port is connected to the bearing on the electric element side of the compression element or to the outer periphery of the discharge muffler provided on this bearing. A discharge gas flow path is provided on the outer periphery of the stator core of the electric element, the discharge gas flow path being opened closer to the stator of the electric element and facing toward the outer circumference, and the gas discharged from the discharge port is provided on the outer circumference of the stator core of the electric element, on the side of the electric element in the closed container. It is characterized by being led to the space at the end of the compression element in the airtight container through the space at the end, the inner circumference from the stator of the electric element, and the inner circumference from the stator coil in the central space. Horizontal rotary compressor.