JPWO2019044349A1 - Compressor - Google Patents

Abstract

A compressor, which comprises a compression mechanism (2), a fixed scroll (6) and a swivel scroll (7), a compression chamber (9), a suction chamber (11), a discharge port (12), and the like. It is provided with a muffler (16) and a heat insulating member (24) provided between the fixed scroll (6) and the muffler (16). The refrigerant gas sucked into the suction chamber (11) is compressed by the swirling scroll (7) swirling and the compression chamber (9) moving while changing the volume, and then discharged from the discharge port (12). To. The refrigerant gas discharged from the discharge port (12) is discharged into the muffler space (14) formed by the muffler (16). The heat insulating member (24) has a heat insulating member discharge port (25), a lead valve (13), and a recess (27).

Description

The present disclosure relates to a cooling device such as an air conditioner for air conditioning and a refrigerator, and a compressor used for a heat pump type hot water supply device and the like.

Conventionally, a closed compressor used in a cooling device, a hot water supply device, or the like plays a role of compressing the refrigerant gas returned from the refrigerating cycle by a compression mechanism unit and sending it to the refrigerating cycle. The refrigerant gas returned from the refrigeration cycle is supplied to the compression chamber formed in the compression mechanism portion via the suction path. After that, the compressed refrigerant gas in a high-temperature and high-pressure state is discharged from the compression mechanism into the closed container, and is sent to the refrigeration cycle from the discharge pipe provided in the closed container (see, for example, Patent Document 1). ..

FIG. 5 is a cross-sectional view showing a compression mechanism portion of a conventional scroll compressor described in Patent Document 1.

The low-temperature and low-pressure refrigerant gas is guided to the suction chamber of the fixed scroll 102 through the suction pipe 101 and compressed by the volume change of the compression chamber 103 to become high-temperature and high-pressure. After that, the high-temperature and high-pressure refrigerant gas is discharged from the muffler space 106 to the muffler space 106 composed of the fixed scroll 102 and the muffler 105 covering the upper part of the fixed scroll 102 through the discharge port 104 on the upper part of the fixed scroll 102. It is sent from the discharge pipe 108 to the refrigeration cycle via the inside of the 107.

JP-A-2007-247601

However, in the compressor having the configuration of FIG. 5, the low-temperature refrigerant guided to the suction chamber of the fixed scroll 102 is the hottest and high-pressure refrigerant gas discharged from the discharge port 104 above the fixed scroll 102 into the muffler space 106. Affected by the heat of (eg, being heated).

As a result, the refrigerant gas expands when it is trapped in the compression chamber 103. Therefore, the circulation amount of the refrigerant gas is reduced.

Further, since the refrigerant gas in the process of being compressed in the compression chamber 103 also passes through the fixed scroll 102 from the muffler space 106, it is affected by the heat of the high temperature and high pressure refrigerant gas. Therefore, the refrigerant gas expands and the compression loss of the refrigerant increases.

The present disclosure solves the above-mentioned conventional problems, and an object of the present invention is to provide a highly efficient compressor by suppressing a decrease in the amount of refrigerant circulation and reducing the compression loss of the refrigerant.

The compressor of the present disclosure is fixed to a fixed scroll and a swivel scroll, a compression chamber formed between the fixed scroll and the swivel scroll, and a suction chamber provided on the outer peripheral side of the fixed scroll, which constitute a compression mechanism unit. It includes a discharge port provided at the center of the scroll, a muffler provided so as to cover the discharge port above the fixed scroll, and a heat insulating member provided between the fixed scroll and the muffler. The refrigerant gas sucked into the suction chamber is compressed by the swirling scroll swirling and the compression chamber moving while changing the volume, and then discharged from the discharge port. The refrigerant gas discharged from the discharge port is discharged into the muffler space formed by the muffler. The heat insulating member includes a heat insulating member discharge port provided at a portion facing the discharge port, a lead valve provided on the surface of the heat insulating member opposite to the side facing the fixed scroll, and fixing of the heat insulating member. It has a recess provided on the surface facing the scroll and provided in a region of 360 ° in the circumferential direction facing the suction chamber.

As a result, the high-temperature and high-pressure refrigerant gas compressed in the compression chamber is discharged from the heat insulating member discharge port into the muffler space. Therefore, the high-temperature and high-pressure refrigerant gas discharged into the muffler space has a heat effect on the suction chamber from the muffler space. However, the heat insulating member provided between the fixed scroll and the muffler acts as a heat insulating layer against the influence of the heat. Further, the refrigerant gas and the oil in the refrigerant gas permeate and stay in the recesses provided in the heat insulating member, so that the recesses serve as a second heat insulating layer. Then, this double heat insulating layer suppresses the influence of heat from the muffler space through which the hottest and high pressure refrigerant passes to the suction chamber and the compression chamber before the start of compression, which is the lowest temperature of the fixed scroll. In particular, the recess is provided in a region of the heat insulating member on the surface facing the fixed scroll at 360 ° in the circumferential direction. Therefore, the influence of heat from the muffler space is widely and effectively suppressed over substantially the entire area of the suction chamber and the compression chamber connected thereto. Further, the heat insulating member suppresses the influence of heat on the compression chamber from the high-temperature refrigerant in the space inside the container above the muffler space as well as the muffler space. Therefore, the temperature rise of the refrigerant is strongly suppressed (for example, shutting off), so that the decrease in the circulation amount of the refrigerant is prevented and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

According to the present disclosure, it is possible to provide a highly efficient compressor by suppressing an increase in the temperature of the refrigerant, preventing a decrease in the circulation amount of the refrigerant, and suppressing an increase in the compression loss of the refrigerant.

FIG. 1 is a diagram showing an example of a cross section of the compressor according to the first embodiment of the present disclosure as viewed from the side. FIG. 2 is a diagram showing an example of a main part of the compressor. FIG. 3 is a plan view showing an example of the configuration of the compressor. FIG. 4 is a diagram showing an example of a heat insulating member of the compressor. FIG. 5 is a diagram showing an example of a cross section of the scroll compressor of the comparative example viewed from the side.

The compressor of the first aspect of the present disclosure is provided on the outer peripheral side of the fixed scroll and the swivel scroll, the compression chamber formed between the fixed scroll and the swivel scroll, and the fixed scroll, which constitute the compression mechanism unit. A suction chamber, a discharge port provided in the center of the fixed scroll, a muffler provided so as to cover the discharge port above the fixed scroll, and a heat insulating member provided between the fixed scroll and the muffler. Be prepared. The refrigerant gas sucked into the suction chamber is compressed by the swirling scroll swirling and the compression chamber moving while changing the volume, and then discharged from the discharge port. The refrigerant gas discharged from the discharge port is discharged into the muffler space formed by the muffler. The heat insulating member includes a heat insulating member discharge port provided at a portion facing the discharge port, a lead valve provided on the surface of the heat insulating member opposite to the side facing the fixed scroll, and a heat insulating member. It has a recess provided on the surface facing the fixed scroll and provided in a region of 360 ° in the circumferential direction facing the suction chamber.

As a result, the high-temperature and high-pressure refrigerant gas compressed in the compression chamber is discharged from the heat insulating member discharge port into the muffler space. Therefore, the high-temperature and high-pressure refrigerant gas discharged into the muffler space has a heat effect on the suction chamber from the muffler space. However, the heat insulating member provided between the fixed scroll and the muffler acts as a heat insulating layer against the influence of the heat. Further, the refrigerant gas and the oil in the refrigerant gas permeate and stay in the recesses provided in the heat insulating member, so that the recesses serve as a second heat insulating layer. Then, this double heat insulating layer suppresses the influence of heat from the muffler space through which the hottest and high pressure refrigerant passes to the suction chamber and the compression chamber before the start of compression, which is the lowest temperature of the fixed scroll. In particular, the recess is provided in a region of the heat insulating member on the surface facing the fixed scroll at 360 ° in the circumferential direction. Therefore, the influence of heat from the muffler space is widely and effectively suppressed over substantially the entire area of the suction chamber and the compression chamber connected thereto. Further, the heat insulating member suppresses the influence of heat on the compression chamber from the high-temperature refrigerant in the space inside the container above the muffler space as well as the muffler space. Therefore, the temperature rise of the refrigerant is strongly suppressed, so that the decrease in the circulation amount of the refrigerant is prevented and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

In the second aspect of the present disclosure, the heat insulating member has a fixed scroll at least one of the mouth edge portion of the heat insulating member discharge port provided corresponding to the discharge port and the opening edge portion of the recess. It may have a convex shape that protrudes most toward the side.

As a result, the convex portion of the heat insulating member is pressed against the upper surface of the fixed scroll. Therefore, the discharge port and the recess are strongly blocked. This prevents a circulation action from occurring between the high-temperature and high-pressure refrigerant in the discharge port and the refrigerant in the recess, and reducing the heat insulating effect of the recess. As a result, a high heat insulating effect due to the recess is maintained. Therefore, the effect of preventing the decrease in the amount of refrigerant circulation due to the temperature rise of the refrigerant and the effect of suppressing the increase in the compression loss of the refrigerant are further enhanced. Therefore, a highly efficient compressor can be realized.

A third aspect of the present disclosure may be a configuration in which a portion of the heat insulating member in the vicinity of the heat insulating member discharge port is bolted to a fixed scroll.

As a result, the rim portion of the heat insulating member discharge port comes into close contact with the fixed scroll. Therefore, the airtightness between the discharge port and the recess, where the hottest and high pressure refrigerant is discharged, is improved. As a result, the circulation of the high-temperature and high-pressure refrigerant in the discharge port and the refrigerant in the recess prevents the heat insulating effect of the recess from being reduced. Therefore, the high heat insulating effect due to the recess is maintained. Therefore, the effect of preventing the decrease in the amount of refrigerant circulation due to the temperature rise of the refrigerant and the effect of suppressing the increase in the compression loss of the refrigerant are higher. Therefore, a highly efficient compressor can be realized.

In the fourth aspect of the present disclosure, the heat insulating member may be formed of a porous material such as a sintered metal.

As a result, the heat insulating member has a low thermal conductivity. Therefore, the heat insulating effect of the heat insulating member itself is enhanced. As a result, the influence of heat from the high-temperature and high-pressure refrigerant in the muffler space and the influence of heat from the refrigerant in the space inside the container above the muffler space are more strongly suppressed. Therefore, the decrease in the circulation amount due to the temperature rise of the refrigerant is suppressed more effectively, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

In the fifth aspect of the present disclosure, the heat insulating member may be formed by laminating a plurality of plates.

As a result, the heat insulating member has a reduced heat conduction between the plates. Therefore, the heat insulating effect of the heat insulating member itself is high. As a result, the influence of heat from the high-temperature and high-pressure refrigerant in the muffler space and the influence of heat from the refrigerant in the space inside the container above the muffler space are more strongly suppressed. Further, when the thickness of the plate facing the fixed scroll is thin among the plurality of plates, the plate facing the fixed scroll has high adhesion to the upper surface of the fixed scroll. Therefore, the circulation of the refrigerant in the recess and the high-temperature and high-pressure refrigerant in the discharge port is more reliably prevented. Therefore, the decrease in the circulation amount due to the temperature rise of the refrigerant is suppressed more effectively, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

A sixth aspect of the present disclosure may be such that a plurality of plates include a plate having a recess.

As a result, a heat insulating member having a recess is formed without cutting or the like. Further, when the thickness of the plate facing the fixed scroll is thin among the plurality of plates, the adhesion of the plate having the recess to the fixed scroll becomes high. Therefore, the circulation of the refrigerant in the recess and the high-temperature and high-pressure refrigerant in the discharge port is strongly prevented. Therefore, more efficiently, the decrease in the circulation amount of the refrigerant due to the temperature rise is prevented, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to this embodiment.

(First Embodiment)
FIG. 1 is a diagram showing an example of a cross section of the compressor 50 according to the first embodiment of the present disclosure as viewed from the side. FIG. 2 is a diagram showing an example of a main part of the compressor 50. The part (a) of FIG. 2 is a cross-sectional view, and the part (b) of FIG. 2 is a detailed view showing an example of the configuration of the heat insulating member and the fixed scroll. FIG. 3 is a plan view showing an example of the configuration of the compressor 50. The part (a) of FIG. 3 is a plan view showing an example of the heat insulating member 24 of the compressor 50. The part (b) of FIG. 3 is a plan view showing an example of the compression chamber 9 of the compressor 50. FIG. 4 is a diagram showing an example of the heat insulating member 24 of the compressor 50. The part (a) of FIG. 4 is a plan view. Part (b) of FIG. 4 is a diagram showing an example of a cross section. The part (c) of FIG. 4 is a bottom view.

As shown in FIG. 1, the compressor 50 of the present embodiment includes a closed container 1, a compression mechanism unit 2 arranged inside the closed container 1, and an electric motor unit 3 arranged inside the closed container 1. To be equipped.

The main bearing member 4 is fixed in the closed container 1 by welding, shrink fitting, or the like. The shaft 5 is pivotally supported by the main bearing member 4.

The fixed scroll 6 is bolted onto the main bearing member 4. A swivel scroll 7 that meshes with the fixed scroll 6 is sandwiched between the fixed scroll 6 and the main bearing member 4, and a scroll-type compression mechanism unit 2 is configured.

Between the swivel scroll 7 and the main bearing member 4, a rotation restraint mechanism 8 including an old dam ring or the like is provided to prevent the swivel scroll 7 from rotating and guide it to move in a circular orbit.

The rotation restraint mechanism 8 causes the swivel scroll 7 to move in a circular orbit by driving the swivel scroll 7 eccentrically by the eccentric shaft portion 5a at the upper end of the shaft 5. As a result, the compression chamber 9 formed between the fixed scroll 6 and the swivel scroll 7 moves from the outer peripheral side toward the central portion while reducing the volume of the compression chamber 9. Utilizing this movement, the suction pipe 10 that has passed through the refrigeration cycle outside the closed container 1 is provided on the fixed scroll between the suction pipe 10 and the compression chamber 9, and passes through the suction chamber 11 that is always the suction pressure. , Refrigerant gas is inhaled. The sucked refrigerant gas is confined in the compression chamber 9 and then compressed. The refrigerant gas that has reached a predetermined pressure is discharged by pushing open the lead valve 13 from the discharge port 12 at the center of the fixed scroll 6.

The refrigerant gas discharged by pushing the lead valve 13 open is discharged into the muffler space 14, and is sent from the discharge pipe 17 to the refrigeration cycle via the container inner space 15 of the closed container 1. The muffler space 14 is formed by a muffler 16 whose circumference is fixed to the fixed scroll 6 and covers the discharge port 12 and the lead valve 13.

On the other hand, a pump 18 is provided at the lower end of the shaft 5 that swivels and drives the swivel scroll 7. The suction port of the pump 18 is arranged so as to exist in the oil storage unit 19. The pump 18 operates at the same time as the scroll compressor. Therefore, the pump 18 reliably sucks up the oil in the oil storage portion 19 provided at the bottom of the closed container 1 regardless of the pressure condition and the operating speed.

The oil sucked up by the pump 18 is supplied to the compression mechanism unit 2 through the oil supply hole 20 penetrating the inside of the shaft 5. By removing foreign matter from the oil with an oil filter or the like before or after sucking up the oil with the pump 18, it is possible to prevent foreign matter from entering the compression mechanism portion 2. Therefore, the reliability of the compression mechanism unit 2 can be improved.

The pressure of the oil guided to the compression mechanism unit 2 is substantially the same as the discharge pressure of the scroll compressor. Further, the pressure of the oil guided to the compression mechanism unit 2 also serves as a back pressure source for the swivel scroll 7. As a result, the swivel scroll 7 stably exerts a predetermined compression function without moving away from the fixed scroll 6 or hitting one side. Further, a part of the oil is used to obtain an escape place by the supply pressure and its own weight, so that the fitting portion between the eccentric shaft portion 5a and the swivel scroll 7 and the bearing portion between the shaft 5 and the main bearing member 4 are obtained. After infiltrating into 21 and lubricating each portion, it falls and returns to the oil storage unit 19.

Another part of the oil supplied from the oil supply hole 20 to the high pressure region 22 is formed in the swivel scroll 7, and the rotation restraint mechanism 8 is located through the path 7a having one opening end in the high pressure region 22. It invades the back pressure chamber 23. The infiltrated oil lubricates the thrust sliding portion and the sliding portion of the rotation restraint mechanism 8, and also plays a role of applying back pressure to the swivel scroll 7 in the back pressure chamber 23.

As described above, the refrigerant gas compressed by the compression mechanism unit 2 is sucked into the compression chamber 9 between the fixed scroll 6 and the swivel scroll 7 via the suction chamber 11 provided in the fixed scroll 6 and compressed. Will be done. However, the refrigerant gas compressed by the compression mechanism unit 2 is affected by the heat of the hottest and highest pressure refrigerant gas discharged from the discharge port 12 of the fixed scroll 6 into the muffler space 14.

Therefore, in the present disclosure, a plate-shaped heat insulating member 24 is provided between the fixed scroll 6 and the muffler 16, and the heat insulating member 24 is located between the muffler space 14 and the suction chamber 11. Will be done. Further, the heat insulating member 24 is provided with a recess 27 (see FIGS. 3 and 4) on the surface on the fixed scroll 6 side in a region (range) of 360 ° in the circumferential direction facing the suction chamber 11. ing.

Here, the region of 360 ° in the circumferential direction means 360 ° in the circumferential direction centered on the substantially central portion when the surface of the heat insulating member 24 on the fixed scroll 6 side is viewed from the front. That is, it means that the recess 27 is formed over the entire circumference. In the example of FIG. 3, the recess 27 has a substantially annular portion and a portion protruding from the portion, but the present disclosure is not limited to this example.

The recess 27 communicates with the container inner space 15 (see FIG. 2) via the recess 27a.

A heat insulating member discharge port 25 is formed at a position of the heat insulating member 24 facing the discharge port 12 of the fixed scroll 6. A lead valve 13 for opening and closing the heat insulating member discharge port 25 is provided on the surface of the heat insulating member 24 opposite to the surface facing the fixed scroll 6.

Then, the heat insulating member 24 is fastened and fixed to the fixed scroll 6 together with the muffler 16 through a bolt (not shown) through a hole 26 provided in the outer peripheral portion.

In the compressor 50 of the present embodiment configured as described above, the high-temperature and high-pressure refrigerant gas compressed in the compression chamber 9 is discharged from the heat insulating member discharge port 25 of the heat insulating member 24 to the muffler space 14. .. As a result, the high-temperature and high-pressure refrigerant gas discharged into the muffler space 14 exerts heat on the suction chamber 11 from the muffler space 14.

At this time, the heat insulating member 24 is located between the suction chamber 11 of the fixed scroll 6 and the muffler space 14, and serves as a heat insulating layer. As a result, the influence of heat on the suction chamber 11 of the high-temperature and high-pressure refrigerant in the muffler space 14 is suppressed.

Further, the heat insulating member 24 is formed with a recess 27. In the recess 27, the high-temperature and high-pressure refrigerant discharged into the space 15 inside the container and the oil in the refrigerant enter and stay in the recess 27 through the recess 27a. As a result, the recess 27 is in a state of a temperature lower than that of the hottest and high pressure refrigerant in the muffler space 14. Therefore, the pool of the refrigerant and the oil in the recess 27 serves as a second heat insulating layer. As a result, a strong heat insulating effect is exhibited by combining the first heat insulating action of the heat insulating member 24 and the second heat insulating action of the recess 27.

In particular, the recess 27 is provided over a region of 360 ° in the circumferential direction on the surface of the heat insulating member 24 facing the fixed scroll 6. Therefore, the influence of heat from the muffler space 14 is widely and effectively suppressed over the suction chamber 11 and substantially the entire area of the compression chamber 9 connected to the suction chamber 11.

Therefore, the rise in the refrigerant temperature of the suction chamber 11 and the compression chamber 9 due to the influence of heat from the refrigerant in the muffler space 14 is strongly suppressed. Therefore, the decrease in the circulation amount of the refrigerant is prevented, the volumetric efficiency is improved, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

Further, in the present embodiment, the heat insulating member 24 suppresses the influence of heat from the high temperature refrigerant on the fixed scroll 6 in the container interior space 15 above the muffler space as well as the muffler space 14. Therefore, the temperature of the fixed scroll 6 itself is also kept low. From this point as well, the decrease in the amount of refrigerant circulation due to the increase in the refrigerant temperature is prevented, the volumetric efficiency is improved, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

Here, in the present embodiment, as an example, the heat insulating member 24 is made of sintered metal. Therefore, the rise in the refrigerant temperature is efficiently suppressed. Sintered metal has low thermal conductivity and has a large number of minute spaces. Since the sintered metal has high heat insulating properties, the heat insulating member 24 made of the sintered metal can efficiently suppress the influence of heat from the high-temperature refrigerant in the muffler space 14 and the space inside the container 15.

By forming the heat insulating member 24 from the sintered metal, the heat insulating effect of the heat insulating member 24 is enhanced. Therefore, the rise in the refrigerant temperature is suppressed more efficiently, the decrease in the circulation amount of the refrigerant is prevented, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

The material of the heat insulating member 24 is not limited to the porous material such as sintered metal. For example, any material such as a resin material may be used as long as it is a material having a low thermal conductivity.

Further, the heat insulating member 24 may be a single piece or may be formed by laminating a plurality of plates. In the laminated type heat insulating member 24 formed by laminating a plurality of plates, heat conduction is strongly suppressed between the plates. Therefore, the heat insulating effect is improved and effective. Further, among the plurality of plates constituting the heat insulating member 24, when the plate thickness facing the fixed scroll 6 is thin, for example, to about 1 mm, the plate facing the fixed scroll 6 is moved to the upper surface of the fixed scroll 6. Adhesion is improved. As a result, circulation between the refrigerant in the recess 27 and the high-temperature and high-pressure refrigerant in the discharge port 12 is more reliably prevented. Therefore, the heat insulating action of the recess 27 is more effectively exhibited.

In the present embodiment, the heat insulating member 24 is said to be a member having a predetermined shape in advance. However, the heat insulating member 24 may be formed, for example, between the fixed scroll 6 and the muffler space 14 by injection molding.

Further, the heat insulating member 24 is fixed to the fixed scroll 6 together with the muffler 16 through a hole 26 provided in the outer peripheral portion thereof through a bolt. However, it is further preferable that the portion near the heat insulating member discharge port 25 is fixed to the fixed scroll 6 with a bolt.

As a result, the rim portion of the heat insulating member discharge port 25 and the fixed scroll 6 are brought into close contact with each other, and the space between the discharge port 12 and the recess 27 is strongly blocked. Therefore, the airtightness between the discharge port 12 from which the hottest and high-pressure refrigerant is discharged and the recess 27 is improved. Therefore, the reduction of the heat insulating effect of the recess 27 due to the circulation of the high-temperature and high-pressure refrigerant discharged from the discharge port 12 of the fixed scroll 6 and the refrigerant in the recess 27 is prevented. As a result, the high heat insulating effect of the recess 27 is maintained, the decrease in the circulation amount due to the temperature rise of the refrigerant is efficiently prevented, and the increase in the compression loss of the refrigerant is suppressed. Therefore, a highly efficient compressor can be realized.

Further, the heat insulating member 24 has a convex shape 28 in which the rim portion of the heat insulating member discharge port 25 provided corresponding to the discharge port 12 of the fixed scroll 6 protrudes most toward the fixed scroll side. (See FIG. 2). Therefore, the convex 28 portion is strongly pressed against the upper surface portion of the fixed scroll 6. Therefore, the discharge port 12 and the recess 27 are strongly blocked. Therefore, the reduction of the heat insulating action by the refrigerant and the oil in the recess 27 due to the circulation between the high temperature and high pressure refrigerant in the discharge port 12 and the refrigerant in the recess 27 is more reliably prevented. As a result, the heat insulating effect of the recess 27 becomes good. As a result, the influence of heat by the high-temperature refrigerant in the muffler space 14 is further strongly suppressed. Therefore, the decrease in the circulation amount due to the temperature rise of the refrigerant is more effectively prevented, and the increase in the compression loss of the refrigerant is suppressed. As a result, a highly efficient compressor can be realized.

The convex shape 28 may be, for example, an opening edge portion on the upper surface side of the fixed scroll of the concave portion 27 instead of the mouth edge portion of the heat insulating member discharge port 25. That is, at least one of the mouth edge portion of the heat insulating member discharge port 25 and the opening edge portion on the upper surface side of the fixed scroll of the recess 27 may have a convex shape 28. Then, by providing the convex shape 28 and setting the bolt fixing position to the rim portion of the heat insulating member discharge port 25, the high-temperature and high-pressure refrigerant can more reliably enter the recess 27. It is prevented and effective.

Further, the heat insulating member 24 is formed by laminating a plate provided with the recess 27 and a plate without the recess 27, so that the recess 27 is formed without cutting. Therefore, the heat insulating member 24 is provided at low cost. In addition, a plurality of the recesses 27 are formed in the stacking direction by alternately stacking a plurality of plates provided with the recesses 27 and plates having no recesses. As a result, the heat insulating effect of the recess 27 is further enhanced.

The influence of heat from the muffler space 14 and the container interior space 15 on the suction chamber 11 and the compression chamber 9 is further suppressed by forming a heat insulating layer on the heat insulating member 24 and the muffler 16 itself. Examples of the heat insulating layer include, but are not limited to, a resin coating or a coating treatment containing hollow beads of vacuum or air inside.

As described above, as described with reference to the above embodiment, the present disclosure suppresses an increase in the refrigerant temperature, prevents a decrease in the amount of refrigerant circulation, and suppresses an increase in the compression loss of the refrigerant. As a result, a highly efficient compressor can be realized. However, the present disclosure is not limited to the shape of this embodiment. In other words, the embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present disclosure is shown by the scope of claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims.

According to the present disclosure, as described above, a highly efficient compressor is realized by suppressing an increase in the temperature of the refrigerant, preventing a decrease in the circulation amount of the refrigerant, and suppressing an increase in the compression loss of the refrigerant. Can be done. Therefore, it can be widely used in various devices using a refrigeration cycle.

1,107 Sealed container 2 Compression mechanism 3 Electric motor 4 Main bearing member 5 Shaft 5a Eccentric shaft 6,102 Fixed scroll 7 Swing scroll 7a Path 8 Rotational restraint mechanism 9,103 Compression chamber 10,101 Suction pipe 11 Suction chamber 12 , 104 Discharge port 13 Reed valve 14,106 Muffler space 15 Container space 16,105 Muffler 17,108 Discharge pipe 18 Pump 19 Oil storage part 20 Oil supply hole 21 Bearing part 22 High pressure area 23 Back pressure chamber 24 Insulation member 25 Insulation member Discharge port 26 Hole 27 Concave 27a Concave groove 28 Convex shape 50 Compressor

Claims (6)

Fixed scroll and swivel scroll that make up the compression mechanism,
A compression chamber formed between the fixed scroll and the swivel scroll,
The suction chamber provided on the outer peripheral side of the fixed scroll and
A discharge port provided in the center of the fixed scroll and
A muffler provided so as to cover the discharge port on the upper part of the fixed scroll, and
A heat insulating member provided between the fixed scroll and the muffler is provided.
The refrigerant gas sucked into the suction chamber is compressed by the swirling scroll swirling and the compression chamber moving while changing the volume, and then discharged from the discharge port.
The refrigerant gas discharged from the discharge port is discharged into the muffler space formed by the muffler, and is discharged.
The heat insulating member is
A heat insulating member discharge port provided at a portion facing the discharge port,
A lead valve provided on the surface of the heat insulating member opposite to the side facing the fixed scroll, and
A compressor having a recess provided on a surface of the heat insulating member on the side facing the fixed scroll and provided in a region of 360 ° in the circumferential direction facing the suction chamber. In the heat insulating member, at least one of the mouth edge portion of the heat insulating member discharge port provided corresponding to the discharge port and the opening edge portion of the recess toward the fixed scroll side. The compressor according to claim 1, which has the most protruding convex shape. The compressor according to claim 1 or 2, wherein a portion of the heat insulating member near the discharge port of the heat insulating member is bolted to the fixed scroll. The compressor according to any one of claims 1 to 3, wherein the heat insulating member is made of a porous material such as a sintered metal. The compressor according to any one of claims 1 to 4, wherein the heat insulating member is formed by laminating a plurality of plates. The compressor according to claim 5, wherein the plurality of plates include a plate having the recess.