Compressor and air conditioner

Abstract

To provide a compressor which enables reduction of discharge pressure loss, and to provide an air conditioner.SOLUTION: A compressor 30 includes: a motor 31; a shaft 33 which is rotated by the motor 31 and includes a pin part 32; and a compression mechanism including a main bearing 35 and a sub bearing 36 which rotatably support the shaft 33, and a cylinder 38 forming a compression chamber 37 with the main bearing 35 and the sub bearing 36 and configured to compress a fluid with the pin part 32 rotating in the compression chamber 37. The main bearing 35 has a discharge port 48 which discharges the compressed fluid. The cylinder 38 has a cutout 42 forming a passage of the compressed fluid which leads from the inside of the compression chamber 37 to the discharge port 48. At least an outer periphery part 50 on the compression chamber 37 side of the cutout 42 is a curved surface or chamfered.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a compressor and an air conditioner. [Background technology]

[0002] A rotary compressor compresses a refrigerant in a hollow cylindrical body (cylinder) by rotating a rotating shaft and a hollow cylindrical body (roller) into which an eccentric part (pin part) provided on the shaft is inserted. The compressed refrigerant is discharged from a discharge port provided in a main bearing covering the upper part of the cylinder or a sub-bearing covering the lower part. The discharge port is provided near a vane that divides the inside of the cylinder, straddling the inside of the cylinder and the upper end surface or the lower end surface of the cylinder.

[0003] However, this would cause the flow path of the refrigerant flowing from inside the cylinder to the discharge port to suddenly narrow, increasing pressure loss, so the cylinder is provided with a notch that forms a flow path for the refrigerant connecting the inside of the cylinder to the discharge port.

[0004] A conventional technology is known in which a discharge groove is made circular as a notch and has the same diameter as the discharge port, thereby reducing over-compression of the refrigerant and over-compression loss, and improving compressor efficiency (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2021-161878 A Summary of the Invention [Problem to be solved by the invention]

[0006] Although the above-mentioned conventional technology is effective in smoothing the flow of refrigerant, there is a problem in that the outer periphery of the notch has edges, resulting in a large discharge pressure loss due to fluid resistance. [Means for solving the problem]

[0007] In view of the above problems, the present invention provides a motor and A rotating shaft rotated by an electric motor and having an eccentric portion; a compression mechanism including first and second bearings that rotatably support a rotating shaft, and a hollow cylindrical body that defines a compression chamber together with the first and second bearings and compresses a fluid by an eccentric part that rotates within the compression chamber; Including, The first bearing has a discharge port that discharges the compressed fluid, The compressor is characterized in that the cylindrical body has a notch that forms a flow path for compressed fluid that connects from the compression chamber to the discharge port, and at least the outer periphery of the notch on the compression chamber side is curved or chamfered. Effect of the Invention

[0008] According to the present invention, the discharge pressure loss can be reduced. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of an air conditioning apparatus according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing a first configuration example of a compressor according to the present embodiment. [Diagram 3] FIG. 2 is a diagram showing a configuration example of a compression mechanism. [Figure 4] FIG. 4 is a diagram showing the compression mechanism from the motor side. [Diagram 5] FIG. 1 is a diagram showing an example of a conventional cylinder. [Figure 6] FIG. 13 is a cross-sectional view of a conventional discharge port and a cutout portion taken in the axial direction of a shaft. [Figure 7] FIG. 2 is a diagram showing a first example of a cylinder included in the compressor according to the embodiment. [Figure 8] FIG. 4 is a diagram showing a second example of a cylinder included in the compressor according to the embodiment. [Figure 9] FIG. 4 is a diagram showing a third example of a cylinder included in the compressor according to the embodiment. [Figure 10]FIG. 4 is a diagram showing a second configuration example of the compressor according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 1 is a diagram showing an example of the configuration of an air conditioner according to this embodiment. The air conditioner 10 includes an indoor unit 11 installed in a space (indoors) where air conditioning is performed, and an outdoor unit 20 installed outdoors, and performs air conditioning by circulating a refrigerant as a fluid between the indoor unit 11 and the outdoor unit 20 and exchanging heat with the indoor air.

[0011] The indoor unit 11 and the outdoor unit 20 may each be configured with two or more units, and two or more indoor units 11 may be connected to one outdoor unit 20. The refrigerant may be a hydrofluorocarbon (HFC) or a hydrofluoroolefin (HFO). As the HFC, R32 (CH2F2), R410A (CH2F2+C2HF3), etc. may be used, and as the HFO, R1234yf (CF3CF=CH2), etc. may be used.

[0012] The indoor unit 11 includes an indoor heat exchanger 12, an indoor fan 13, and an indoor fan drive motor 14. The indoor fan 13 is driven by the indoor fan drive motor 14, takes in indoor air, and sends it to the indoor heat exchanger 12. The indoor heat exchanger 12 has a plurality of heat transfer tubes through which a refrigerant flows, and is configured so that the sent air comes into contact with the surfaces of the plurality of heat transfer tubes and exchanges heat with the refrigerant. The air that has undergone heat exchange by the indoor heat exchanger 12 is sent out into the room.

[0013] The indoor unit 11 may also be equipped with various sensors for measuring indoor temperature, humidity, etc., and an indoor expansion valve that reduces the pressure of the refrigerant and expands it, thereby controlling the flow rate of the refrigerant.

[0014] The outdoor unit 20 includes a compressor 21, a four-way valve 22, an outdoor expansion valve 23, an outdoor heat exchanger 24, an outdoor fan 25, and an outdoor fan drive motor 26. The compressor 21 includes an accumulator 27 and is driven by a compressor drive motor to draw in low-pressure gas refrigerant from the accumulator 27, increase the pressure, and discharge it as high-pressure gas refrigerant. The accumulator 27 is a container for preventing liquid return to the compressor 21 during a transition and for separating the liquid, and adjusts the refrigerant to an appropriate dryness. The dryness is the proportion of steam in wet steam, which indicates the mixed state of steam and minute liquid droplets.

[0015] The four-way valve 22 is a valve that switches the direction of refrigerant flow depending on the operating state (operating mode) of the air conditioner 10. The operating modes are cooling mode, heating mode, ventilation mode, etc. The outdoor expansion valve 23 is a valve that reduces the pressure of high-pressure refrigerant and expands it, and is a valve that can control the flow rate of the refrigerant. The outdoor fan 25 is driven by an outdoor fan drive motor 26, takes in outdoor air, and sends it to the outdoor heat exchanger 24. Like the indoor heat exchanger 12, the outdoor heat exchanger 24 also has multiple heat transfer tubes through which the refrigerant flows, and is configured so that the sent-in air comes into contact with the surfaces of the multiple heat transfer tubes and exchanges heat with the refrigerant. The air that has been heat exchanged by the outdoor heat exchanger 24 is sent outside.

[0016] The outdoor unit 20 further includes a control device 28. The control device 28 is connected to the compressor 21, the four-way valve 22, the outdoor expansion valve 23, the indoor fan drive motor 14, and the outdoor fan drive motor 26, and controls these. The control device 28 controls the rotation speed of the compressor 21, the opening degree of the outdoor expansion valve 23, the rotation speed of the indoor fan drive motor 14, the rotation speed of the outdoor fan drive motor 26, etc. The control device 28 can perform these controls based on information detected by various sensors. Note that the control device 28 is not limited to being installed in the outdoor unit 20, and may be installed in the indoor unit 11 or in a location other than these.

[0017] In the cooling mode, the indoor heat exchanger 12 is used as an evaporator, and the outdoor heat exchanger 24 is used as a condenser, and as shown by the arrows, the refrigerant sealed in the system is circulated in the order of the compressor 21, four-way valve 22, outdoor heat exchanger 24, outdoor expansion valve 23, indoor heat exchanger 12, four-way valve 22, accumulator 27, and compressor 21. In the heating mode, on the other hand, the indoor heat exchanger 12 is used as a condenser, and the outdoor heat exchanger 24 is used as an evaporator, and the arrows are directed in the opposite direction, and the refrigerant sealed in the system is circulated in the order of the compressor 21, four-way valve 22, indoor heat exchanger 12, outdoor expansion valve 23, outdoor heat exchanger 24, four-way valve 22, accumulator 27, and compressor 21.

[0018] Here, the air conditioner 10 has been taken as an example of a device equipped with a compressor 21, but the device is not limited to this and may be a refrigerator, a chiller unit, or the like.

[0019] Fig. 2 is a diagram showing a first configuration example of a compressor according to this embodiment. Compressor 30 is a compressor used in the air conditioner shown in Fig. 1, for example, and is a rotary compressor. Compressor 30 includes motor 31 as an electric motor, shaft 33 rotated by motor 31 and equipped with pin portion 32, and a compression mechanism. Compressor 30 has motor 31, shaft 33, and compression mechanism housed in sealed container 34.

[0020] The compression mechanism includes a main bearing 35 as a first bearing that rotatably supports the shaft 33, and a sub-bearing 36 as a second bearing, and a cylinder 38 that forms a compression chamber 37 together with the main bearing 35 and the sub-bearing 36 and compresses the fluid by the pin portion 32 that rotates within the compression chamber 37.

[0021] The motor 31 includes a hollow cylindrical stator 31a and a rotor 31b that is rotatably disposed within the stator 31a and has a permanent magnet as a magnet. The shaft 33 is disposed at the center of the rotor 31b when viewed from one side in the longitudinal direction (axial direction) of the shaft 33, and rotates with the rotation of the rotor 31b.

[0022] The container 34 is a hollow container that is circular in cross section and elongated in one direction, and a shaft 33 is disposed at the center of the cross section. The motor 31 is disposed on one side of the shaft 33 along the longitudinal direction of the container 34, and a compression mechanism is disposed on the other side.

[0023] As shown in Fig. 3, the compression mechanism divides the compression chamber 37 into two spaces by a hollow cylinder (roller) 39 into which the pin portion 32 is inserted and a partition plate (vane) 40, takes in a refrigerant as a fluid into one space of the compression chamber 37, and the roller 39 rotates eccentrically around the shaft 33 while in contact with the inner wall of the cylinder 38, thereby reducing the volume of the one space and compressing the refrigerant taken in the one space. When viewed from the motor 31 side, the shaft 33 rotates counterclockwise. The vane 40 has an elastic member 41 such as a spring provided at the end so that the tip is always kept in contact with the roller 39, and is always kept in a state of being pressed against the roller 39.

[0024] The cylinder 38 is provided with a notch 42 that constitutes a refrigerant flow path that connects the inside of the compression chamber 37 with a discharge port provided in the main bearing 35. Therefore, the refrigerant compressed in the compression chamber 37 is sent to the discharge port through the notch 42 and is discharged from the discharge port.

[0025] 2 again, the compression mechanism takes in refrigerant through suction nozzle 43 and discharges the refrigerant compressed in compression chamber 37 from a discharge port, which is provided with a discharge valve that is pushed up by the pressure of the refrigerant and discharged into space 44 above main bearing 35 through the gap created by the lift. The refrigerant then passes through the gap between stator 31a and rotor 31b, etc., and is sent to space 45 above motor 31 in container 34, and is discharged from discharge nozzle 46 provided at the top of container 34.

[0026] 4 is a view of the compression mechanism seen from the motor 31 side. A discharge port is provided in the main bearing 35 for discharging the refrigerant compressed in the compression chamber 37, and a discharge valve 47 is disposed to close the discharge port. The discharge valve 47 is a long plate-like member that closes the discharge port on one side and is fixed to the main bearing 35 on the other side. When the pressure of the refrigerant in the compression chamber 37 reaches or exceeds a predetermined pressure, the discharge valve 47 is pushed up, and the refrigerant in the compression chamber 37 is discharged onto the main bearing 35 through a gap that is formed when the discharge valve 47 is pushed up.

[0027] FIG. 5 shows an example of a conventional cylinder. FIG. 5(a) shows the main bearing 35 superimposed on the cylinder 38, and FIG. 5(b) shows an enlarged view of the discharge port. The discharge port 48 is provided in the main bearing 35. The notch 42 is formed in a groove shape from the inside of the cylinder 38, which is the compression chamber 37 side, to the upper end of the cylinder 38. When viewed from the motor 31 side, the notch 42 is formed in a substantially semicircular shape adjacent to the storage groove 49 that stores the vane 40. This is to prevent the compressed refrigerant from remaining in the compression chamber 37 and being overcompressed.

[0028] As shown in Fig. 5(b), the diameter of the approximately semicircular cutout 42 is approximately the same as the diameter of the discharge port 48 of the main bearing 35 arranged above the cutout 42. This prevents the flow path from expanding or contracting, thereby reducing discharge pressure loss. In addition, the corners of the storage groove 49 formed in the cylinder 38 on the compression chamber 37 side are chamfered so as not to increase pressure loss during reciprocation of the vane 40.

[0029] Incidentally, the cutout 42 provided in the cylinder 38 has a shape in which the upper inner corner of the cylinder 38 is cut obliquely in a cross section taken along the cutting line AA shown in Fig. 5(a) as shown in Fig. 6. Fig. 6 also shows the discharge port 48 of the main bearing 35, which has an edge on its outer periphery 50 on the compression chamber 37 side, and the edge increases the fluid resistance. This increases the pressure loss, leading to a decrease in the performance of the compressor.

[0030] Therefore, in order to reduce the fluid resistance, reduce the pressure loss, and improve the performance of the compressor, the shape of the notch 42 is designed to be as described below.

[0031] Fig. 7 is a diagram showing a first example of a cylinder 38 included in the compressor 30 according to this embodiment. Fig. 7(a) is a diagram showing the cylinder 38 as viewed obliquely from the motor 31 side, and Fig. 7(b) is a diagram showing a cross section taken along the cutting line BB. As described with reference to Fig. 5, the cylinder 38 has a notch 42 formed on the inside, which is the compression chamber 37 side, of the cylinder 38. When viewed from the motor 31 side, the notch 42 is formed in a substantially semicircular shape adjacent to a storage groove 49 that stores the vane 40.

[0032] A notch 42 is provided on one side of the storage groove 49, and a suction port 51 is provided on the other side for sucking the refrigerant into the compression chamber 37. The roller 39 rotates in the compression direction indicated by the arrow while contacting the inside of the cylinder 38, compressing the refrigerant.

[0033] As shown in Fig. 7(b), the outer periphery 50 of the notch 42 on the inside of the cylinder 38 is chamfered to form a curved surface (approximately R-shaped). The curved surface has a radius of curvature of 0.5 mm or more in a cross section taken along the cutting line BB in Fig. 7(a). If the radius of curvature is less than 0.5 mm, the effect of reducing fluid resistance is small, and machining to achieve such a radius of curvature becomes difficult.

[0034] In addition, the outer periphery 50 of the notch 42 is not limited to a curved surface, and may be chamfered by cutting the edge obliquely (hereinafter, simply referred to as chamfering). The chamfering is performed by cutting at an angle of approximately 45° with respect to the upper end surface or the lower end surface of the cylinder 38 at positions at equal distances of 0.5 mm or more from the edge in the radial direction of the cylinder 38 and in the direction of the auxiliary bearing 36 on the inner surface of the cylinder 38 along the axial direction of the shaft 33. That is, the edge is cut at an angle of 45° so as to connect a position, for example, 0.7 mm away from the edge in the radial direction of the cylinder 38 and a position at the same distance of 0.7 mm in the direction of the auxiliary bearing 36 on the inner surface of the cylinder 38, and the corners are cut off to perform the chamfering. In this case, too, if the chamfering is performed less than 0.5 mm, the effect of reducing the fluid resistance is small and the processing becomes difficult, so the chamfering is performed by cutting at 0.5 mm or more.

[0035] In this way, by making the outer circumferential portion 50 of the notch 42 on the compression chamber 37 side curved or chamfered, the refrigerant can flow smoothly from within the compression chamber 37 to the notch 42, reducing fluid resistance and reducing pressure loss.

[0036] Fig. 8 is a diagram showing a second example of the cylinder 38 included in the compressor according to this embodiment. Fig. 8 shows an enlarged view of only the portion of the notch 42. Like the cylinder 38 shown in Fig. 7, the cylinder 38 has an outer circumferential portion 50 on the inside of the cylinder 38, the notch 42, curved (generally R-shaped) or chamfered, but the width of the curved or chamfered portion is different between the high crank angle side and the low crank angle side.

[0037] When compressing the refrigerant, the crank angle is 0° when the most protruding part of the pin part 32 in the direction perpendicular to the axial direction of the shaft 33 coincides with the direction in which the vane 40 extends, and the shaft 33 rotates counterclockwise as viewed from the motor 31 side, which is the compression direction shown in FIG. 7(a). Therefore, when the shaft 33 rotates once counterclockwise, the most protruding part of the pin part 32 once leaves the vane 40, passes in front of the notch 42 provided adjacent to the vane 40, and returns to the position where the vane 40 is located. The crank angle is the angle between the direction in which the most protruding part of the pin part 32 faces and the direction in which the vane 40 extends. When the direction in which the most protruding part of the pin part 32 faces is closer to the vane 40 than the center of the notch 42, the crank angle is larger than the crank angle when it coincides with the center of the notch 42, so it is on the high crank angle side, and the opposite side has a smaller crank angle, so it is on the low crank angle side.

[0038] The wider the width of the curved or chamfered outer periphery 50 of the notch 42, the larger the radius of curvature becomes, the larger the area of ​​the chamfer becomes, and the more the discharge pressure loss can be reduced. On the other hand, since the area of ​​the notch 42 opening to the inside of the cylinder 38 increases, the high-pressure side and the low-pressure side are connected via the notch 42 with the roller 39 in between, and the refrigerant on the high-pressure side flows back to the low-pressure side, decreasing the crank angle at which the refrigerant can be compressed. The decrease in the crank angle at which the refrigerant can be compressed leads to compression loss.

[0039] Since such backflow occurs on the low crank angle side, it can be suppressed by making the width of the outer circumferential portion 50 smaller on the low crank angle side than on the high crank angle side. When the low crank angle side is curved, the radius of curvature can be set to a minimum of 0.5 mm, and the radius of curvature on the high crank angle side can be set to be greater than 0.5 mm. This makes it possible to suppress a decrease in the crank angle at which compression is possible, and to suppress compression loss. Note that by reducing the width on the low crank angle side and increasing the width on the high crank angle side, it is possible to reduce discharge pressure loss while suppressing compression loss.

[0040] FIG. 9 is a diagram showing a third example of the cylinder 38 included in the compressor 30 according to this embodiment. FIG. 9(a) is a diagram showing the cylinder 38 obliquely viewed from the motor 31 side, and FIG. 9(b) is a diagram showing a cross section cut along the cutting line CC. In the example shown in FIG. 7, only the outer circumferential portion 50 of the notch 42 on the inside of the cylinder 38 is curved or chamfered. In this case, edges remain on the outer circumferential portion 50 of the notch 42 on the discharge side end face (upper end face) side of the cylinder 38, and discharge pressure loss occurs due to fluid resistance. For this reason, the outer circumferential portion 50 of the notch 42 on the upper end face side of the cylinder 38 can also be curved or chamfered.

[0041] When the surface is curved, the outer periphery 50 of the notch 42 on the upper end face side of the cylinder 38 can also have a radius of curvature of 0.5 mm or more, similar to the inner outer periphery 50 of the cylinder 38. This can further reduce the discharge pressure loss.

[0042] When the outer periphery 50 of the notch 42 of the cylinder 38 is to be curved or chamfered, molten metal is poured into a mold, cooled and solidified to produce a cylinder 38 having a notch 42, and then the outer periphery 50 of the notch 42 of the manufactured cylinder 38 is machined or otherwise cast to make the outer periphery 50 curved or chamfered.

[0043] However, this requires casting, which takes time and energy, and raw materials such as iron must be heated above their melting point to turn them into liquid form and then poured into a mold.

[0044] Therefore, by using a sintered material as the raw material, using a mold that can curve or chamfer the outer periphery 50, and heating at a temperature lower than the melting point while applying pressure, it is possible to reduce the energy used and manufacture a cylinder 38 with a curved outer periphery 50 or a chamfered notch 42 without performing casting processing.

[0045] Fig. 10 is a diagram showing a second configuration example of the compressor according to this embodiment. The compressor 30 shown in Fig. 10 has a configuration similar to that of the compressor 30 shown in Fig. 2, and has a two-stage compression mechanism. In the case of the compressor 30 shown in Fig. 2 having a one-stage compression mechanism, there is one cylinder 38, and the upper part of the cylinder 38 is covered by a main bearing 35 and the lower part of the cylinder 38 is covered by a sub-bearing 36.

[0046] When the compression mechanism is configured in two stages, there are two cylinders 38, and a partition plate 52 is provided between the cylinders 38. Therefore, of the two cylinders 38, the lower part of the upper cylinder 38a and the lower cylinder 38b are covered with the partition plate 52, the upper part of the upper cylinder 38a is covered with the main bearing 35, and the lower part of the lower cylinder 38b is covered with the auxiliary bearing 36.

[0047] The shaft 33 is provided with two pin portions 32, which are disposed inside the upper cylinder 38a and the lower cylinder 38b, respectively, and are inserted into the two rollers 39, respectively. The upper cylinder 38a and the lower cylinder 38b are each provided with a storage groove 49, and each of them stores a vane 40.

[0048] In this case, a notch 42 is provided in each of the upper cylinder 38a and the lower cylinder 38b, and a discharge port 48 and a discharge valve 47 are provided in the auxiliary bearing 36 in addition to the main bearing 35. Then, outer peripheries 50 of the notches 42 of each of the upper cylinder 38a and the lower cylinder 38b are curved or chamfered.

[0049] As described above, by providing the compressor and air conditioner of the present invention, the flow resistance at the refrigerant discharge portion including the notch 42 is reduced, and the discharge pressure loss can be reduced.

[0050] While the compressor and air conditioning apparatus of the present invention have been described in detail using the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments and can be modified within the scope of what a person skilled in the art can conceive, including other embodiments, additions, modifications, omissions, and the like, and any aspect is within the scope of the present invention as long as it achieves the functions and effects of the present invention.

[0051] Therefore, according to the present invention, it is possible to provide (1) a compressor including a compression mechanism including an electric motor, a rotating shaft rotated by the electric motor and having an eccentric portion, first and second bearings rotatably supporting the rotating shaft, and a hollow cylindrical body which defines a compression chamber together with the first and second bearings and compresses fluid by the eccentric portion rotating within the compression chamber, wherein the first bearing has a discharge port for discharging the compressed fluid, the cylindrical body has a notch which defines a flow path for the compressed fluid connecting from the compression chamber to the discharge port, and at least the outer periphery of the notch on the compression chamber side is curved or chamfered.

[0052] According to the present invention, (2) it is possible to provide the compressor described in (1) above, characterized in that the compression mechanism includes a hollow cylinder into which the eccentric portion is inserted, and a partition plate that abuts against the outer surface of the cylinder to divide the compression chamber into two spaces, and when the rotation angle at which the most protruding portion of the eccentric portion from the outer circumferential surface of the rotating shaft abuts against the partition plate via the cylinder, and the rotating shaft rotates and the most protruding portion of the eccentric portion abuts against the partition plate again via the cylinder is defined as a crank angle, the outer circumferential portion is curved or chamfered on the compression chamber side of the notch, and is smaller on the low crank angle side than on the high crank angle side.

[0053] According to the present invention, (3) it is possible to provide the compressor described in (1) or (2) above, characterized in that the outer periphery of the notch on the discharge port side is also curved or chamfered.

[0054] According to the present invention, (4) it is possible to provide the compressor according to any one of (1) to (3) above, in which at least the outer circumferential portion of the notch on the compression chamber side is curved, and the curved surface has a radius of curvature of 0.5 mm or more.

[0055] According to the present invention, (5) it is possible to provide the compressor described in any one of (1) to (4) above, characterized in that the cylindrical body having the notch and at least the outer periphery of the notch on the compression chamber side being curved or chamfered is formed using a mold using a sintered material as raw material.

[0056] According to the present invention, (6) it is possible to provide the compressor according to any one of (1) to (5) above, in which the rotating shaft has two of the eccentric portions, each of the two compression mechanisms including the cylindrical body, each of the cylindrical bodies has the notch, and at least the outer periphery of the notch on the compression chamber side is curved or chamfered.

[0057] According to the present invention, it is possible to provide an air conditioner including a compressor according to any one of (1) to (6) above. [Explanation of symbols]

[0058] 10...Air conditioning equipment 11...Indoor unit 12…Indoor heat exchanger 13…Indoor fan 14...Indoor fan drive motor 20…Outdoor unit 21...Compressor 22...Four-way valve 23…Outdoor expansion valve 24…Outdoor heat exchanger 25…Outdoor fan 26...Outdoor fan drive motor 27…Accumulator 28...Control device 30…Compressor 31…Motor 31a…Stator 31b...Rotor 32…Pin section 33…Shaft 34…Container 35…Main bearing 36…Sub bearing 37…Compression chamber 38…Cylinder 38a…Upper cylinder 38b…Lower cylinder 39…Laura 40…Vane 41...Elastic member 42…Notch 43…Suction nozzle 44, 45…space 46…Discharge nozzle 47…Discharge valve 48…Discharge port 49…Storage groove 50…Outer periphery 51…Suction port 52…Partition plate

Claims

1. An electric motor; a rotating shaft rotated by the electric motor and having an eccentric part; a compression mechanism including first and second bearings that rotatably support the rotary shaft, and a hollow cylindrical body that defines a compression chamber together with the first and second bearings and compresses a fluid by the eccentric portion that rotates within the compression chamber; Including, the first bearing has a discharge port for discharging the compressed fluid, a compressor characterized in that the cylindrical body has a notch that forms a flow path for the compressed fluid connecting from the compression chamber to the discharge port, and at least an outer periphery of the notch on the compression chamber side is curved or chamfered.

2. the compression mechanism includes a hollow cylinder into which the eccentric portion is inserted, and a partition plate that abuts against an outer surface of the cylinder to divide the compression chamber into two spaces, 2. The compressor according to claim 1, characterized in that, when a rotation angle at which a most protruding portion of the eccentric portion from an outer circumferential surface of the rotating shaft abuts against the partition plate via the cylindrical body and the rotating shaft rotates and the most protruding portion of the eccentric portion abuts against the partition plate again via the cylindrical body is defined as a crank angle, the outer circumferential portion, which is curved or chamfered on the compression chamber side of the notch, is smaller on a low crank angle side than on a high crank angle side.

3. 2. The compressor according to claim 1, wherein the outer periphery of the cutout on the discharge port side is also curved or chamfered.

4. 4. The compressor according to claim 1, wherein at least an outer periphery of the cutout on the compression chamber side is curved, and a radius of curvature of the curved surface is 0.5 mm or more.

5. The compressor according to any one of claims 1 to 3, characterized in that the cylindrical body having the notch and having an outer periphery on at least the compression chamber side of the notch curved or chamfered is formed using a mold using a sintered material as a raw material.

6. the compressor includes two of the eccentric portions on the rotating shaft, and includes two of the compression mechanisms, each of which includes the cylindrical body; The compressor according to any one of claims 1 to 3, wherein each of the cylindrical bodies has the notch, and at least an outer periphery of the notch on the compression chamber side is curved or chamfered.

7. An air conditioning device including a compressor, The compressor, An electric motor; a rotating shaft rotated by the electric motor and having an eccentric part; a compression mechanism including first and second bearings that rotatably support the rotary shaft, and a hollow cylindrical body that defines a compression chamber together with the first and second bearings and compresses a fluid by the eccentric portion that rotates within the compression chamber; Including, the first bearing has a discharge port for discharging the compressed fluid, An air conditioning device characterized in that the cylindrical body has a notch that forms a flow path for the compressed fluid connecting from the compression chamber to the discharge outlet, and at least the outer periphery of the notch on the compression chamber side is curved or chamfered.

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