JP4468157B2 - Scroll compressor and air conditioner - Google Patents

Description

  The present invention relates to a scroll compressor and an air conditioner, and more particularly to an oil supply structure in a scroll portion of the scroll compressor.

  In the compression chamber formed between the fixed scroll and the orbiting scroll in the scroll compressor, compression leakage may occur from the gap between the scrolls during compression. When such a compression leak occurs, the compression efficiency of the compressor is rapidly reduced. 2. Description of the Related Art In recent years, as a new type scroll compressor, one having a stepped portion at the upper edge of a spiral scroll wrap and a scroll end plate bottom is known (for example, Patent Document 1). In this scroll compressor, since the spiral spiral wrap height on the outer periphery of the scroll becomes relatively large by providing step portions on the upper edge and the end plate of the spiral spiral wrap, a crescent-shaped hermetic seal formed on the outermost periphery is provided. The volume of increases. Thereby, compressor efficiency can be improved. In addition, since the wrap height is relatively low at the center of the spiral wrap where the compression reaction force of the fluid acts most, there is no problem of rigidity.

JP 2002-303281 A

  However, in this scroll type compressor, since there are step portions on the spiral wrap tooth tips and the bottom of the fixed scroll and the orbiting scroll, compression leakage may occur from the step portions, and the technology for preventing this compression leakage is extremely high. is important.

  Then, this invention is made | formed in view of the above, Comprising: It aims at providing the scroll compressor and air conditioning apparatus which can reduce a compression leak.

  In order to solve the above-described problems and achieve the object, the scroll compressor according to the present invention is such that a fixed scroll and a turning scroll in which a spiral wrap is erected on one side surface of each end plate mesh with each other. In the scroll compressor that forms the compression chamber, the wrap of the fixed scroll and the orbiting scroll has an upper edge forming a tooth tip, and a step portion on the tooth tip side is formed on the tooth tip. The heights of the fixed scroll and the orbiting scroll end plates form a tooth bottom, and the tooth bottom has a step portion on the tooth bottom side. And at least one of the fixed scroll and the orbiting scroll is provided with oil supply means for supplying oil to the stepped portion.

  According to the present invention, since oil can be directly supplied to the step portion of the scroll where compression leakage may occur, an oil film can be formed on the contact surface in the step portion, and the gap in the step portion is reduced. be able to. As a result, it is possible to increase the sealing degree of the compression chamber and improve the compression efficiency without requiring advanced processing technology and processing accuracy in the step portion of the scroll, and without performing special coating or the like. .

  In the scroll compressor according to the next invention, the oil supply means supplies oil from an oil supply hole provided in the step portion.

  According to this invention, by providing the oil supply hole in the step portion of the scroll, oil can be supplied to the step portion, so that the step portion in which the fixed scroll and the orbiting scroll mesh can be effectively sealed. Thereby, the sealing degree of a compression chamber can be raised and compression efficiency can be improved.

In the scroll compressor according to the next invention, the oil supply hole is provided in the step portion of the wrap of the fixed scroll and the orbiting scroll.

According to the present invention, since the oil supply holes are provided in the step portions of the wraps of the fixed scroll and the orbiting scroll, it is possible to effectively suppress the compression leakage at the step portions meshing with each other.

The scroll compressor according to the next invention is characterized in that the oil supply hole is provided in a tooth bottom of an end plate of the fixed scroll and the orbiting scroll.

According to this invention, since the oil supply hole is provided in the tooth bottom of the end plate of the fixed scroll and the orbiting scroll, it is possible to effectively suppress the compression leakage at the stepped portion that meshes with each other.

In the scroll compressor according to the next invention, the oil supply hole is provided in the step portion of the wrap of the fixed scroll or the orbiting scroll, and is provided in the tooth bottom of the end plate of the fixed scroll or the orbiting scroll. It is characterized by being.

  According to the present invention, by providing the oil supply holes in the tooth tip and the tooth bottom of the step portion of the scroll, oil can be supplied to each step portion, so that the step portion in which the fixed scroll and the orbiting scroll mesh with each other is effective. Can be sealed. Thereby, the sealing degree of a compression chamber can be raised and compression efficiency can be improved.

  In the scroll compressor according to the next invention, the oil supply hole is provided on a side surface of the step portion.

  According to this invention, by providing the oil supply hole on the side surface of the step portion, it is possible to effectively seal the step portion at which the fixed scroll and the orbiting scroll mesh with each other.

  In the scroll compressor according to the next invention, the oil supply hole is provided on a side surface of the stepped portion and on an upper side in a vertical direction.

  According to the present invention, the oil supplied from the oil supply hole flows down along the side surface of the step portion by its own weight, so that the entire step side surface can be effectively sealed.

  The scroll compressor according to the next invention is characterized in that the oil supply hole is provided on a side surface of the step portion and upstream of the orbiting scroll in the orbiting direction.

  According to the present invention, since the oil supply hole on the side surface of the step portion of the end plate of the fixed scroll is provided on the upstream side in the turning direction of the orbiting scroll wrap, the supplied oil is stretched by the orbiting scroll wrap. As a result, oil can be supplied to the entire side surface of the step portion. Thereby, the whole step part side surface can be sealed.

The scroll compressor according to the next invention is characterized in that a groove is provided in a step portion of the fixed scroll or the orbiting scroll, and the oil supply hole is opened in the groove.

  According to this invention, the oil supplied from the oil supply hole can be spread over the entire contact surface between the step portion of the fixed scroll and the step portion of the orbiting scroll, and compression leakage can be reduced.

The scroll compressor according to another aspect of the present invention, characterized in that with the groove is provided on the tooth bottom of the front Symbol fixed scroll or the end plate at the stepped portion of the orbiting scroll, the oil supply hole in the groove is open And

  According to this invention, the oil supplied from the oil supply hole can be spread over the entire contact surface between the step portion of the fixed scroll and the step portion of the orbiting scroll, and compression leakage can be reduced.

  In the scroll compressor according to the next invention, the step portion includes a holding means for holding the oil supplied from the oil supply hole.

  According to this invention, the oil supplied from the oil supply hole can be held on the contact surface between the step portion of the fixed scroll and the step portion of the orbiting scroll, and a stable oil film can be formed. Thereby, a leak clearance can be effectively sealed.

  A scroll compressor according to the next invention is characterized in that a seal member is provided at a tooth tip of a lap of the fixed scroll or the orbiting scroll, and an oil supply passage for supplying oil to the back side of the seal member is provided.

  According to the present invention, by supplying oil to the step portion of the scroll, the step portion where the fixed scroll and the orbiting scroll are engaged can be effectively sealed, and the tip seal is provided by supplying it to the back side of the tip seal. Can be brought into close contact with the end plate of the fixed scroll or the orbiting scroll. Thereby, the sealing degree of a compression chamber can be raised more and compression efficiency can be improved.

  The scroll compressor according to the next invention is characterized in that the oil supply passage communicates with an oil supply passage for supplying oil to the oil supply hole of the stepped portion.

  According to this invention, since the oil supply passage to the step portion and the oil supply passage to the back side of the chip seal can be used together, processing becomes easy.

  The scroll compressor according to the next invention has an oil reservoir for supplying oil to the oil supply hole, and is a pressure adjusting means between the oil reservoir and the oil supply hole and inside the fixed scroll or the orbiting scroll. It is characterized by providing.

  According to this invention, since oil can be supplied through the pressure adjusting means, gas overheating in the compression chamber due to excessive supply of oil that has become hot can be prevented, and as a result, reduction in compression efficiency can be prevented. Can do. Further, since the pressure adjusting mechanism is provided inside the fixed scroll or the orbiting scroll, the compressor itself can be reduced in size.

  The scroll compressor according to the next invention is characterized in that the pressure adjusting means supplies oil at different oil supply pressures depending on the position of oil supply.

  According to the present invention, when oil is supplied to the tooth tip-bottom meshing surface on the upper side in the gravity direction, the oil is difficult to be held. A capillary with a small squeezing degree is arranged as an adjustment mechanism to prevent insufficient supply. On the other hand, when oil is supplied to the tooth tip-bottom meshing surface on the lower side in the direction of gravity, the oil is easily retained, so that the direction of gravity is reduced. By disposing a capillary with a high degree of drawing as a pressure adjusting mechanism in the supply passage to the lower tooth tip-bottom meshing surface, the supply amount can be adjusted by the oil supply portion.

  The scroll compressor according to the next invention is characterized in that the pressure adjusting mechanism is provided in a portion of the fixed scroll or the end plate of the orbiting scroll where the tooth bottom is high.

  According to this invention, since the pressure adjusting mechanism is provided inside the portion of the fixed scroll or the end plate of the orbiting scroll where the tooth bottom is high, the compressor itself can be downsized.

  An air conditioner according to the next invention includes a scroll compressor, a condenser for condensing and liquefying the refrigerant discharged from the scroll compressor, and decompressing and expanding the refrigerant liquefied by the condenser to produce a low-temperature and low-pressure liquid. It includes an expansion valve as a refrigerant, and an evaporator that exchanges heat between the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve and the air.

  According to this invention, since the compression leakage in the scroll compressor can be suppressed, the compression efficiency can be improved, and the air conditioning capability of the air conditioner can be improved.

  According to the scroll compressor and the air conditioner according to the present invention, by supplying oil to the stepped portion and sealing it, the gap generated in the stepped portion can be reduced, and the compression leakage at the time of compression is reduced. be able to. Thereby, compression efficiency can be improved.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

  FIG. 1 is a diagram showing an overall configuration of a scroll compressor according to the present invention. The scroll compressor 1 has a fixed scroll 3 fixed in a housing 2 and a turning scroll 4 supported in the housing 2 so as to revolve freely. The fixed scroll 3 shown in FIG. 3 includes an end plate 5 and a spiral wrap 6 erected on the end plate 5. Further, the orbiting scroll 4 shown in FIG. 4 includes an end plate 7 and a spiral wrap 8 erected on the end plate 7. The spiral wraps 6 and 8 of the fixed scroll 3 and the orbiting scroll 4 have inner and outer walls formed by involute curves generated from the base circle, respectively.

  The fixed scroll 3 and the orbiting scroll 4 are arranged in combination in a state in which the phases of the spiral wraps 6 and 8 are shifted by 180 degrees and are shifted by a predetermined distance with respect to the radial direction of the scroll. The orbiting scroll 4 is connected to a shaft 9 connected to a power source, revolves with respect to the fixed scroll 3, and gradually reduces the volume of a plurality of compression chambers formed between the spiral wraps 6 and 8. The fluid in the compression chamber is compressed.

  Next, a refrigeration cycle in an air conditioner using this scroll compressor will be described. FIG. 2 is a refrigerant circuit diagram of an air-conditioning apparatus to which the scroll compressor according to the present invention is applied. The scroll compressor 1 compresses the refrigerant and sends it to the capacitor 100 as a high-temperature and high-pressure gas refrigerant. The condenser 100 cools the high-temperature and high-pressure gas refrigerant supplied from the scroll compressor 1 by releasing heat to the outside air, and condenses and liquefies the gas refrigerant. The refrigerant liquefied by the condenser 100 is sent to the expansion valve 200, and is decompressed and expanded by the expansion valve 200 to be converted into a low-temperature and low-pressure liquid refrigerant and supplied to the evaporator 300. The evaporator 300 heat-exchanges this low-temperature and low-pressure liquid refrigerant and air to cool the air.

  Next, the shapes of the fixed scroll 3 and the orbiting scroll 4 of the scroll compressor 1 according to the present invention will be described. FIG. 3 is a diagram showing a fixed scroll according to the present invention, and FIG. 4 is a diagram showing a turning scroll according to the present invention.

  As shown in FIG. 3, the fixed scroll 3 has a spiral wrap 6 erected on one side surface of the end plate 5. The upper edge of the spiral wrap 6 (hereinafter referred to as the tooth tip) has a step portion 10 on the tooth tip side in the middle from the center in the spiral direction to the outer peripheral end side. That is, the tooth tip has a stepped shape in which the center side in the vortex direction is formed as a low portion 11 having a low height and the outer peripheral end side is formed as a high portion 12 having a high height.

  Similarly, one side surface of the end plate 5 (hereinafter referred to as a tooth bottom) has a step portion 20 on the tooth bottom side in the middle from the center in the vortex direction to the outer peripheral end. That is, the center side in the spiral direction is formed as a high portion 13 having a high height, and the outer peripheral end side has a stepped shape formed as a low portion 14 having a low height. Moreover, in the step part 10 on the tooth tip side, the low part 11 and the high part 12 are connected by a step part side face 15 as a connection edge. Similarly, in the step portion 20 on the tooth bottom side, the low portion 14 and the high portion 13 are connected by a step portion side surface 16 as a connecting edge.

  Furthermore, a concave groove is formed in the tooth tip of the spiral wrap 6, and a chip seal 17 is fitted into the groove as a seal member for ensuring the airtightness of the compression chamber. The tip seal 17 is divided into two parts, one from the center in the vortex direction to the front of the step part 10 on the tooth tip side, and the one from the rear of the step part 10 on the tooth tip side toward the outer peripheral end 40. That is, there is a break in the tip seal 17 at the stepped portion 10. Therefore, the step part 10 on the tooth tip side means at least a region between the cuts of the tip seal 17. Similarly, the step portion 20 on the tooth bottom side refers to a region corresponding to the chip seal break at the step portion on the tooth tip side that meshes with the step portion 20 on the tooth bottom side.

  Next, the shape of the orbiting scroll 4 will be described. The orbiting scroll 4 has a spiral wrap 8 erected on one side surface of the end plate 7 like the above-described fixed scroll. The tooth tip of the spiral wound wrap 8 has a step portion 60 on the tooth tip side in the middle from the center in the spiral direction to the outer peripheral end side. That is, the tooth tip has a stepped shape in which the center side in the vortex direction is formed as a low portion 61 having a low height and the outer peripheral end side is formed as a high portion 62 having a high height.

  Similarly, the tooth bottom of the end plate 7 has a step portion 70 on the tooth bottom side in the middle from the center in the vortex direction to the outer peripheral end. That is, the center side in the spiral direction is formed as a high portion 71 having a high height, and the outer peripheral end side has a stepped shape formed as a low portion 72 having a low height. Moreover, in the step part 60 on the tooth tip side, the low part 61 and the high part 62 are connected by a step part side face 65 as a connection edge. Similarly, in the step portion 70 on the tooth bottom side, the low portion 72 and the high portion 71 are connected by a step side surface 75 as a connection edge.

  Further, a concave groove is formed in the tooth tip of the spiral wound wrap 8, and a chip seal 77 is fitted into the groove as a seal member for ensuring the airtightness of the compression chamber. The tip seal 77 is divided into two parts, one from the center in the vortex direction to the front of the step 60 on the tooth tip side, and one from the rear of the step 60 on the tooth tip side toward the outer peripheral end 80. That is, there is a break in the tip seal 77 at the stepped portion 60. Accordingly, the stepped portion 60 on the tooth tip side means at least a region between the cuts of the tip seal 77. Similarly, the step portion 70 on the tooth bottom side refers to a region corresponding to the tip seal break at the step portion on the tooth tip side that meshes with the step portion 70 on the tooth bottom side.

  By engaging the fixed scroll 3 and the orbiting scroll 4 with each other, the stepped portion 20 of the end plate 5 of the fixed scroll 3 is engaged with the high portion 62 of the step 60 of the wrap 8 tooth tip of the orbiting scroll 4. The step portion 70 of the end plate 7 of the scroll 4 is engaged with the high portion 12 of the step portion 10 on the wrap 6 tooth tip side of the fixed scroll, thereby forming a hermetic compression chamber.

  An oil reservoir 18 is provided at the bottom of the scroll compressor 1, and the oil stored in the oil reservoir 18 is supplied to the bearing and the like through the shaft 9 to lubricate the bearing and the like. An oil separator 19 that separates the compressed refrigerant and the lubricating oil contained in the refrigerant is disposed on the fixed scroll 3, and the oil separated by the oil separator 19 is an oil reservoir. 21 is recovered. The recovered oil is returned to the oil reservoir 18 again.

  FIG. 5 is an enlarged view showing the step portion 10 on the tooth tip side of the wrap 6 of the fixed scroll 3, and FIG. 6 is an enlarged view showing the step portion 20 on the tooth bottom side of the end plate 5 of the fixed scroll 3. . The lap tooth tip of the step portion 10 on the tooth tip side is provided with an oil supply hole 22 as an oil supply means. Specifically, it is preferably provided at the position of the tip of the tip seal 17 in the step portion 10 on the tooth tip side where the wrap height is lower. The oil supply hole 22 communicates with the oil reservoir 21, and the oil separated by the oil separator 19 reaches the oil supply hole 22 through the oil supply passage 23, and the teeth in the stepped portion 10 on the tooth tip side of the fixed scroll 3. Supplied first.

  6 is also provided in the stepped portion 20 on the tooth bottom side of the end plate 5 of the fixed scroll 3. As shown in FIG. Specifically, it is preferable to provide at the position of the tooth tip with the higher wrap height. The oil supply hole 24 communicates with the oil sump portion 21 in the same manner as the oil supply hole 22 in the stepped portion 10 of the fixed scroll 3, and the oil separated by the oil separator 19 passes through the oil supply passage 23 and is supplied with oil. It reaches the hole 24 and is supplied to the step 20 on the tooth bottom side of the end plate 5 of the fixed scroll 3.

  The oil separated by the oil separator 19 and recovered in the oil reservoir 21 is at a high pressure because it is after being compressed in the compression chamber. On the other hand, since the step part 10 on the tooth tip side and the step part 20 on the tooth bottom side of the fixed scroll 3 are in the compression process position, the intermediate pressure is intermediate between the low pressure and the high pressure. Therefore, due to the pressure difference between the high pressure and the intermediate pressure, the oil reservoir 21 passes from the oil reservoir 21 through the supply passage that communicates with the stepped portion 10 on the tooth tip side and the stepped portion 20 on the bottom side of the fixed scroll. Oil flows into the oil supply hole 22 of the step 10 on the tooth tip side of the fixed scroll and the oil supply hole 24 of the step 20 on the tooth bottom side.

  In this way, by engaging the fixed scroll 3 and the orbiting scroll 4 provided with the oil supply holes 22 and 24 in the step portion 10 on the tooth tip side and the step portion 20 on the tooth bottom side, respectively, the respective step portions 10 and 20 are engaged. Oil is supplied to the portion where the two mesh with each other, and the gap in the stepped portions 10 and 20 can be sealed. That is, since oil is supplied to the position of the cut of the chip seal 17, the leakage gap can be sealed with oil, and compression leakage can be reduced.

  Furthermore, if the same oil supply hole 25 is provided also in the step part side surface 15 in FIG. 5, and the same oil supply hole 26 is provided also in the step part side surface 16 in FIG. 6, a sealing effect can be improved further. That is, the fixed scroll 3 and the orbiting scroll 4 are refueled by supplying oil to the stepped side surfaces 15 and 16 in addition to refueling the stepped portion 10 on the tooth tip side and the stepped portion 20 on the tooth bottom side of the fixed scroll 3. The gap generated between the stepped side surface 15 on the tooth tip side of the fixed scroll and the stepped side surface 75 on the tooth bottom side of the orbiting scroll can be reduced. Similarly, a gap generated between the stepped side surface 16 on the tooth bottom side of the fixed scroll 3 and the stepped side surface 65 on the tooth tip side of the orbiting scroll 4 can be reduced. Thereby, a compression leak can be reduced and the fall of compression efficiency can be suppressed.

  As shown in FIGS. 5 and 6, the step portion 10 on the tooth tip side and the step portion 20 on the tooth bottom side are provided with minute grooves. The oil supply hole 22 in the step part 10 on the tooth tip side opens into the minute groove 28. The oil supply hole 25 provided in the stepped portion side surface 15 of the stepped portion 10 on the tooth tip side opens into the minute groove 30. Similarly, the oil supply hole 24 in the step portion 20 on the tooth bottom side opens into the minute groove 29, and the oil supply hole 26 provided on the step portion side surface 16 in the step portion 20 on the tooth bottom side opens into the minute groove 31.

  The minute grooves 28, 29, 30, 31 are used to spread the oil supplied from the oil supply holes 22, 24, 25, 26 over the entire contact surface between the step portion of the fixed scroll 3 and the step portion of the orbiting scroll. It is. That is, the oil supplied from the oil supply hole 22 spreads in the spiral direction of the stepped tooth tip by the minute groove 28 and can be sealed more reliably. Similarly, the oil supplied from the oil supply hole 25 is provided by the minute groove 30, the oil supplied from the oil supply hole 24 is provided by the minute groove 29, and the oil supplied from the oil supply hole 26 is provided by the minute groove 31, respectively. , Spread over the entire bottom of the stepped portion and the side of the stepped portion. As a result, the oil discharged from one oil supply hole spreads over the entire contact surface between the stepped portion of the fixed scroll 3 and the stepped portion of the orbiting scroll 4, and can be sealed more reliably and the degree of sealing of the compression chamber can be increased. Can do.

  Furthermore, a holding means for holding the supplied oil may be provided around the micro grooves 28, 29, 30, 31 described above. 7 and 8 are diagrams showing modifications of the first embodiment of the present invention. As shown in FIGS. 7 and 8, by providing an oil retaining groove 32 as a retaining means so as to be parallel to the micro grooves 28, 29, 30, 31 connected to the oil supply holes 22, 24, 25, 26 described above, The oil supplied from the oil supply holes 22, 24, 25, 26 can always be held on the contact surfaces of the stepped portions 10, 20. Thereby, an oil film can always be formed on the step tooth tip, the step tooth bottom and the step side surface where the step portion of the fixed scroll 3 and the step portion of the orbiting scroll come into contact with each other, and the leak gap can be stably sealed. Can do.

  The holding means described above is not limited to the form of the oil holding groove 32. That is, the same effect can be obtained even if a plurality of dimple-shaped holding holes are provided around the oil supply hole.

In the embodiment described above, the wrap 6 of the fixed scroll 3 and the step portions 10 and 20 of the end plate 5 are provided with the oil supply means. However, the wrap 8 of the orbiting scroll 4 and the step portions of the end plate 7 are refueled. Even if means are provided, the same effect can be obtained.
That is, an oil supply hole may be formed in at least one step portion of the fixed scroll 3 or the orbiting scroll 4.

  Next, a modified example of the oil supply passage will be described. FIG. 9 is a diagram showing a modification of the first embodiment of the present invention. The oil separated by the oil separator 19 is supplied from the oil reservoir to the back side of the tip seal 17 provided at the wrap tooth tip through the supply passage 23a. By supplying high-pressure oil from the back side of the tip seal, the tip seal can be pushed up and pressed against the orbiting scroll 4. Thereby, the sealing degree of a compression chamber can be raised more. Further, the supply passage to the back side of the chip seal may be independent from the supply passage leading to the oil supply hole of the stepped portion, or both supply passages may be used.

  Next, a second embodiment of the present invention will be described. The scroll compressor according to the second embodiment has substantially the same configuration as the scroll compressor according to the first embodiment, but the position of the oil supply hole is different. Since other configurations are the same as those of the first embodiment, the description thereof is omitted and the same components are denoted by the same reference numerals.

  FIG. 10 is an enlarged view showing the stepped portion 33 on the tooth tip side of the orbiting scroll 4 in the second embodiment of the present invention. In this embodiment, it is possible to seal more effectively by changing the position of the oil supply hole in the first embodiment described above. In the description of this embodiment, the case where the oil supply hole is provided in the step portion of the orbiting scroll 4 will be described. However, this embodiment can also be applied to the case where the oil supply hole is provided in the step portion of the fixed scroll 3.

  As shown in FIG. 10, the oil supply hole 36 in the stepped portion side surface 35 on the tooth tip side of the wrap of the orbiting scroll 4 is close to the high portion side tooth tip 38 where the height of the step portion 33 on the tooth tip side is high. Provide on the side. Thereby, since the oil supplied from the oil supply hole 36 flows down vertically by its own weight, an oil film on the entire step portion side surface 35 can be secured. Thereby, the whole step part side surface 35 can be sealed effectively.

In addition, when the oil supply hole is provided in the fixed scroll 3, it is preferable to provide the oil supply hole in the side close | similar to the end plate of the step part side surface of a tooth tip side. Thereby, since the oil supplied from the oil supply hole flows down vertically by its own weight, an oil film on the entire side surface of the step portion can be secured.
In the above description, the compressor in which the fixed scroll is disposed on the upper side and the orbiting scroll is disposed on the lower side has been described. However, as the specifications of the compressor, the orbiting scroll is disposed on the upper side and the fixed scroll is disposed on the lower side. In the compressor, the position of the oil supply hole can be changed. That is, in the compressor in which the orbiting scroll is disposed on the upper side and the fixed scroll is disposed on the lower side, the oil supply hole on the stepped portion side surface of the orbiting scroll wrap is used as an end plate on the stepped portion side surface on the tooth tip side. It is preferable to provide on the near side.

  Next, a third embodiment of the present invention will be described. The scroll compressor according to the third embodiment has substantially the same configuration as the scroll compressor according to the first embodiment, but the positions of the oil supply holes are different. Since other configurations are the same as those of the first embodiment, the description thereof is omitted and the same components are denoted by the same reference numerals.

  FIG. 11 is an enlarged view showing a stepped portion 43 on the tooth bottom side of the end plate 5 of the fixed scroll 3 according to the third embodiment of the present invention. FIG. 12 is a view showing a state in which the fixed scroll 3 and the orbiting scroll 4 are engaged with each other. In the description of the present embodiment, the case where the oil supply hole is provided in the step portion of the fixed scroll 3 will be described.

  When providing the oil supply hole in the fixed scroll 3, the position of the oil supply hole 38 of the step part side surface 37 in an end plate is changed. Thereby, it becomes possible to seal more effectively. As shown in FIGS. 10 and 11, an oil supply hole 38 in the stepped portion side surface 37 of the stepped portion 43 on the tooth bottom side of the end plate 5 of the fixed scroll 3 is provided on the upstream side in the turning direction of the wrap of the orbiting scroll 4. That is, when the orbiting scroll 4 orbits while the fixed scroll 3 and the orbiting scroll 4 are engaged with each other, the step 33 on the tooth tip side of the wrap of the orbiting scroll 4 is the step on the tooth bottom side of the end plate 5 of the fixed scroll 3. The portion 43 is turned along the step side surface 37 of the step portion 43 on the tooth bottom side of the end plate 5 of the fixed scroll 3 from the point A to the point B shown in FIG. At this time, the oil supply hole 38 on the step side surface 37 of the end plate 5 of the fixed scroll 3 and the oil supply hole 26 on the step side surface 15 on the tooth tip side of the fixed scroll 3 are provided on the upstream side in the turning direction of the wrap of the orbiting scroll 4. Therefore, the supplied oil is pulled by the wrap of the orbiting scroll 4, and the oil can be supplied to the entire side surface of the step portion.

  Next, a fourth embodiment of the present invention will be described. The scroll compressor according to the fourth embodiment has substantially the same configuration as the scroll compressor according to the first embodiment, but the configuration of the oil supply passage is different. Since other configurations are the same as those of the first embodiment, the description thereof is omitted and the same components are denoted by the same reference numerals.

  FIG. 13 is a diagram showing a scroll compressor according to the fourth embodiment of the present invention. As shown in FIG. 13, a capillary 50 is provided inside the end plate 5 of the fixed scroll 3 as a pressure adjustment mechanism. When the oil is supplied from the oil reservoir 21 that collects the oil separated by the oil separator 19 to the oil supply hole provided at the tip of the wrap, if supplied as it is, the amount of oil supply may be excessive. When the amount of oil supply becomes excessive, the gas in the compression chamber is overheated by the oil, and the compression efficiency may be reduced. Therefore, by providing the capillary 50 in the supply passage and reducing the pressure, the pressure can be lowered to an appropriate value and then supplied from the oil supply hole to the stepped portion. Similarly, when supplying to the stepped tooth bottom, the pressure can be reduced through the capillary 51 and then supplied.

  In addition, since the end plate 5 of the fixed scroll 3 has the step part 20 on the tooth bottom side, a thick portion X and a thin portion Y exist. Therefore, by disposing the capillary 50 in the portion where the end plate is thick, it is possible to secure a large volume for storing the capillary 50 and to reduce the size of the compressor itself.

  In addition, when supplying to the fixed scroll tooth tip and when supplying to the fixed scroll tooth bottom, the degree of oil retention after supply differs depending on the direction of gravity and the like, and therefore the pressure adjustment degree of the capillaries 50 and 51 is different. You may do it. That is, as shown in FIG. 13, when oil is supplied to the fixed scroll tooth bottom, the oil flows down due to its own weight, and therefore it is difficult to be held by the stepped portion. A small capillary 51 is arranged to prevent supply shortage. On the other hand, when oil is supplied to the fixed scroll tooth tip, since the oil is easily held, the capillary 50 having a large throttling degree is arranged in the supply passage. Thereby, supplying oil more than necessary can be prevented.

  In the above description, the case where the fixed scroll 3 is arranged on the upper side and the oil is supplied from the upper side has been described. However, the fixed scroll 3 is arranged on the lower side and the oil is supplied from the lower side. If so, change the degree of pressure adjustment. In other words, when oil is supplied from the lower side to the tooth tip and bottom of the fixed scroll, a capillary with a small throttling degree is arranged in the supply passage to the fixed scroll tooth tip, and the supply passage to the tooth bottom is provided. The same effect as in the above-described embodiment can be obtained by arranging a capillary with a large aperture. Even when oil is supplied from the orbiting scroll side, a capillary with a small degree of throttling should be arranged in the supply passage to the upper side in the direction of gravity, and a capillary with a large throttling degree should be arranged in the supply passage to the lower side in the direction of gravity. Thus, the same effect as in the above-described embodiment can be obtained.

  In this embodiment, the capillaries 50 and 51 are used as the diaphragm mechanism, but the present invention is not limited to this. That is, the same effect can be obtained even if a spiral pin or the like is used as the aperture mechanism.

  Further, in the above-described embodiments, the description has been given of the case where the throttle mechanism is provided inside the end plate of the fixed scroll, but the same effect can be obtained even if the throttle mechanism is provided inside the end plate of the orbiting scroll. .

It is a figure showing the whole scroll type compressor composition concerning the present invention. It is a refrigerant circuit figure of the air harmony device to which the scroll type compressor concerning the present invention is applied. It is a figure which shows the fixed scroll which concerns on this invention. It is a figure which shows the turning scroll which concerns on this invention. It is an enlarged view which shows the step part in the tooth tip of the fixed scroll which concerns on this invention. It is an enlarged view which shows the step part in the end plate of the fixed scroll which concerns on this invention. It is a figure which shows the modification of the 1st Example of this invention. It is a figure which shows the modification of the 1st Example of this invention. It is a figure which shows the modification of the 1st Example of this invention. It is a figure which shows the step part in the wrap tooth tip of the fixed scroll in 2nd Example of this invention. It is a figure which shows the step part in the end plate of the fixed scroll in 2nd Example of this invention. It is a figure which shows the state which the fixed scroll and the turning scroll of the scroll compressor which concern on this invention meshed | engaged. It is a figure which shows the fixed scroll in the 3rd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scroll type compressor 3 Fixed scroll 4 Orbiting scroll 10, 60 Step part 17 of tooth tip side Tip seal 20, 70 Step part 22, 24, 25, 26, 36, 38 of tooth bottom side Oil supply hole 28, 29, 30 , 31 Micro groove 32 Oil retaining groove 50, 51 Capillary

Claims (15)

In the scroll type compressor in which the fixed scroll and the orbiting scroll in which the spiral wrap is erected on one side surface of each end plate form a compression chamber by meshing with each other,
The fixed scroll and the orbiting scroll wrap have an upper edge forming a tooth tip, and the tooth tip has a step portion on the tooth tip side, so that the height differs in the vortex direction,
One side surface of the end plate of the fixed scroll and the orbiting scroll forms a tooth bottom, and a step on the tooth bottom side is formed on the tooth bottom.
At least one of the fixed scroll or the orbiting scroll is provided with oil supply means for supplying oil to the stepped portion,
A seal member is provided at the tip of the fixed scroll or the orbiting scroll wrap, and an oil supply passage for supplying oil to the back side of the seal member is provided,
The scroll type compressor, wherein the oil supply passage communicates with an oil supply passage for supplying oil to the oil supply hole of the stepped portion.   The scroll compressor according to claim 1, wherein the oil supply means supplies oil from an oil supply hole provided in the stepped portion. 3. The scroll compressor according to claim 2, wherein the oil supply hole is provided in the stepped portion of the wrap of the fixed scroll and the orbiting scroll.   The scroll compressor according to claim 2, wherein the oil supply hole is provided in a tooth bottom of an end plate of the fixed scroll and the orbiting scroll. 3. The scroll compressor according to claim 2, wherein the oil supply hole is provided in the step portion of the fixed scroll or the wrap of the orbiting scroll and the tooth bottom of the end plate .   The scroll type compressor according to any one of claims 1 to 5, wherein the oil supply hole is provided on a side surface of the step portion.   The scroll compressor according to claim 6, wherein the oil supply hole is provided on a side surface of the step portion and on an upper side in a vertical direction.   8. The scroll compressor according to claim 6, wherein the oil supply hole is provided on a side surface of the stepped portion and on an upstream side in a turning direction of the orbiting scroll. The scroll type compression according to any one of claims 1 to 8, wherein a groove is provided in a step portion of the fixed scroll or the orbiting scroll, and the oil supply hole is opened in the groove. Machine.   The groove of the end plate in the step of the fixed scroll or the orbiting scroll is provided with a groove, and the oil supply hole is opened in the groove. The scroll compressor described in 1.   The scroll compressor according to any one of claims 1 to 10, wherein the step portion includes a holding unit that holds oil supplied from an oil supply hole.   2. An oil reservoir for supplying oil to the oil supply hole, and a pressure adjusting means is provided between the oil reservoir and the oil supply hole and inside the fixed scroll or the orbiting scroll. Scroll compressor of any one of -11.   The scroll compressor according to claim 12, wherein the pressure adjusting means supplies oil at a different oil supply pressure depending on a position where the oil is supplied.   The scroll compressor according to claim 12 or 13, wherein the pressure adjusting means is provided inside a portion of the fixed scroll or the end plate of the orbiting scroll where the tooth bottom is high. . A scroll compressor according to any one of claims 1 to 14,
A condenser for condensing and liquefying the refrigerant discharged from the scroll compressor;
An expansion valve that decompresses and expands the refrigerant liquefied by the condenser to form a low-temperature and low-pressure liquid refrigerant;
An evaporator for exchanging heat between the low-temperature and low-pressure liquid refrigerant that has passed through the expansion valve and the air;
An air conditioner comprising:

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