compressor

Abstract

The present application provides a compressor, which includes: a female rotor, a male rotor and a housing, wherein the female rotor and the male rotor each have a plurality of teeth, and the female rotor and the male rotor both have an exhaust end face, wherein the plurality of teeth form a corresponding tooth end face on the exhaust end face, and the tooth end face is defined by a tooth end face contour line; the housing has an exhaust end mating surface, and the exhaust end mating surface is provided with at least one refrigerant channel outlet, and each of the at least one refrigerant channel outlet has a pair of outlet side edges arranged along the rotation direction of a corresponding one of the female rotor and the male rotor; during the rotation of the female rotor or the male rotor, the refrigerant channel outlet can be completely blocked by the tooth end face of the corresponding one of the female rotor or the male rotor, and the pair of outlet side edges can at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor at the same time. The compressor provided by the present application can improve the efficiency of the economizer.

Description

Technical Field

[0001] The present application provides a compressor, in particular a twin-screw compressor used in a refrigeration system. Background Art

[0002] The twin-screw compressor has a pair of male and female rotors that can mesh with each other, and the refrigerant is compressed by the relative rotation of the male and female rotors. The twin-screw compressor is connected to the economizer system, which provides a portion of the refrigerant (or other medium) to the compressor to improve the capacity of the twin-screw compressor. Summary of the invention

[0003] The present application provides a twin-screw compressor that can obtain refrigerant from an economizer system nearly continuously, thereby making the compressor run more smoothly.

[0004] The compressor comprises:

[0005] A female rotor and a male rotor, each of which has a plurality of teeth, each of which can rotate around its own axis and mesh with the plurality of teeth to compress the refrigerant, each of which has an exhaust end, the exhaust end having an exhaust end face, the plurality of teeth forming corresponding tooth end faces on the exhaust end face, the tooth end face being defined by a tooth end face contour line; a shell, the female rotor and the male rotor are arranged in the shell, the shell having an exhaust end mating face, the exhaust end face of the exhaust end cooperates with the exhaust end mating face to form a compression space together with the female rotor and the male rotor and other parts of the shell; at least one refrigerant channel, the at least one refrigerant channel is connected to a compressor economizer system, the at least one refrigerant channel is configured to transfer the refrigerant in the economizer system to the compressor. The refrigerant is delivered to the compression space, each of the at least one refrigerant channel has a refrigerant channel outlet, each of the refrigerant channel outlets is arranged on the exhaust end mating surface corresponding to one of the female rotor and the male rotor, and each of the refrigerant channel outlets has a pair of outlet side edges arranged along the rotation direction of the corresponding one of the female rotor and the male rotor; wherein each of the refrigerant channel outlets and the tooth end face contour line of the tooth end face are configured as follows: during the rotation of the female rotor or the male rotor, the refrigerant channel outlet can be completely blocked by the tooth end face of the corresponding one of the female rotor or the male rotor, and the pair of outlet side edges can at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor at the same time.

[0006] For the compressor as described above, during the rotation of the female rotor or the male rotor, at the moment when the pair of outlet side edges at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor, the refrigerant channel outlet is completely blocked by the tooth end face of the corresponding one of the female rotor or the male rotor.

[0007] In the compressor as described above, the tooth end surface contour line is consistent with the profile line of the teeth of the corresponding one of the female rotor and the male rotor.

[0008] In the compressor as described above, the contour lines of the pair of outlet side edges are consistent with the profile lines of the teeth of the corresponding one of the female rotor and the male rotor.

[0009] As described above, in the compressor, the tooth end face contour line has a pair of tooth end face side edges arranged along the rotation direction of the corresponding one of the female rotor and the male rotor, and at least one of the pair of tooth end face side edges has a deviation segment, and the deviation segment deviates inward from the profile of the corresponding tooth; wherein, when the pair of outlet side edges at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor at the same time, at least one of the pair of outlet side edges coincides with at least one of the corresponding pair of tooth end face side edges at the deviation segment.

[0010] As described above, the exhaust end of the female rotor and the male rotor further comprises at least one drainage groove, each of the at least one drainage groove is formed by being recessed inward from the plane where the exhaust end face is located, each of the at least one drainage groove has an open end connected to the inter-tooth space and a closed end opposite to the open end, the top of the drainage groove forms a groove contour line on the exhaust end face, the groove contour line comprises a groove closed end contour line corresponding to the closed end, and the deviation sections of the side edges of the pair of tooth end faces are formed by the groove closed end contour line.

[0011] In the compressor as described above, the at least one drainage groove includes a pair of drainage grooves, and the pair of drainage grooves are respectively located on both sides of the tooth top of a tooth, and a pair of outlet side edges of the refrigerant channel outlet can at least partially coincide with the groove closed end contour lines of the pair of drainage grooves at the same time.

[0012] In the compressor as described above, the at least one drainage groove includes a drainage groove located on one side of the tooth top of the corresponding tooth, and one of the pair of outlet side edges of the refrigerant channel outlet can at least partially coincide with the groove closed end contour line of the drainage groove.

[0013] In the compressor as described above, each of the at least one refrigerant passage comprises an outlet section extending from the outlet of the refrigerant passage toward the interior of the shell.

[0014] In the compressor as described above, the at least one refrigerant channel includes a plurality of refrigerant channels, the refrigerant channel outlets of a portion of the plurality of refrigerant channels correspond to the tooth end surface of the female rotor, and the refrigerant channel outlets of another portion of the refrigerant channels correspond to the tooth end surface of the male rotor.

[0015] The compressor in the present application enables the economizer to provide refrigerant nearly continuously, thereby effectively improving the efficiency of the economizer; at the same time, it also helps to reduce the additional pressure fluctuations caused by periodic blockage of the outlet when the tooth end surface of the female rotor or the male rotor sweeps across the refrigerant outlet, so that the pressure pulsation level in the economizer supply pipeline is within a very small range, which is beneficial to reducing the overall vibration and noise of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A is a three-dimensional diagram of the compressor in the present application;

[0017] Figure 1B yes Figure 1A A cross-sectional view of the compressor;

[0018] Figure 2A yes Figure 1B A three-dimensional view of the Zhongyang rotor;

[0019] Figure 2B yes Figure 2A Side view of the Zhongyang rotor;

[0020] Figure 2C yes Figure 1B A three-dimensional view of the middle Yin rotor;

[0021] Figure 2D yes Figure 2C Side view of the middle yin rotor;

[0022] Figure 3A yes Figure 1A another cross-sectional view of the compressor;

[0023] Figure 3B yes Figure 3A A partial enlarged view of the refrigerant channel;

[0024] Figure 4A is a three-dimensional diagram of the rear housing and the female rotor of the compressor of the first embodiment of the present application;

[0025] Figure 4B yes Figure 4A A perspective view of the middle and rear housing;

[0026] Figure 5A yes Figure 4B A schematic diagram of the relative positions of the refrigerant channel outlet and the tooth end surface at the first moment;

[0027] Figure 5B yes Figure 4B A schematic diagram of the relative positions of the refrigerant channel outlet and the tooth end surface at the second moment;

[0028] Figure 5C yes Figure 4B the relative position between the outlet of the middle refrigerant channel and the tooth end surface at the third moment;

[0029] Fig. 6A is a perspective view of the rear housing and the female rotor of the compressor of the second embodiment of the present application;

[0030] Figure 6B yes Fig. 6A A perspective view of the middle and rear housing;

[0031] Fig. 7A is a perspective view of the rear housing of a compressor according to a third embodiment of the present application;

[0032] Figure 7B is a stereoscopic diagram of a male rotor in a third embodiment of the present application;

[0033] Figure 7C yes Figure 7B A side view of the Zhongyang rotor;

[0034] Fig. 8A is a perspective view of the rear housing of a compressor according to a fourth embodiment of the present application;

[0035] Figure 8B It is a stereoscopic diagram of the female rotor of the fourth embodiment of the present application. DETAILED DESCRIPTION

[0036] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "positive", "negative", "proximal", "distal", "lateral", "longitudinal", etc., are used in the present application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description, and these terms are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0037] Ordinal numbers such as "first" and "second" used in this application are only used for distinction and identification, and do not have any other meanings. If not specifically specified, they do not indicate a specific order or have a specific association. For example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0038] Figure 1A is a three-dimensional diagram of the compressor in this application, Figure 1B yes Figure 1A A cross-sectional view of the compressor in FIG. Figure 1A and Figure 1B As shown, the compressor 100 includes a housing 101 and a male rotor 102 and a female rotor 103 located in the housing 101. The male rotor 102 and the female rotor 103 can be driven to rotate. The male rotor 102 has a male rotor body 120 and male rotor connecting parts 128 and 129, the male rotor connecting parts 128 and 129 are located at both ends of the male rotor body 120 in the axial direction, the male rotor connecting part 129 is pivotally connected to the housing 101, and the male rotor connecting part 128 is transmission-connected to the motor 140, so that the motor 140 can drive the male rotor 102 to rotate relative to the housing 101 around the axis of the male rotor 102. Similarly, the female rotor 103 has a female rotor body 130 and female rotor connecting parts 138 and 139, which are located at both ends of the female rotor body 130 in the axial direction, and the female rotor connecting parts 138 and 139 are respectively pivotally connected to the housing 101, and the female rotor 103 can be driven by the male rotor 102 to rotate relative to the housing 101 around the axis of the female rotor 103. The outer side of the male rotor body 120 has a plurality of spiral teeth 168 and spiral grooves formed between adjacent teeth 168, and the outer side of the female rotor body 130 also has a plurality of spiral teeth 169 and spiral grooves formed between adjacent teeth 169. The teeth 168 and grooves of the male rotor body 120 and the grooves and teeth 169 of the female rotor body 130 form a mutually meshing structure, so that the male rotor body 120, the female rotor body 130 and the housing 101 together form a compression space 105. The housing 101 has an air intake port 121 and an air discharge port 122. The refrigerant enters the compressor from the air intake port 121 and is discharged from the air discharge port 122 after being compressed. The housing 101 is provided with a refrigerant passage 302 (see Figure 3A ), for providing refrigerant to the compression space 105 of the compressor 100. The refrigerant channel inlet 141 is located on the outside of the shell 101, and is used to connect with the economizer system, which guides part of the refrigerant in the refrigeration cycle system back to the compressor to improve the capacity of the compressor. For example, the economizer system connects the refrigerant channel 302 with the bottom of the condenser or the subcooler, and guides a small part of the refrigerant liquid from the bottom of the condenser or the subcooler back to the compressor, and this part of the refrigerant liquid can enter the compressor using the natural pressure difference.

[0039] The housing 101 includes a front housing 171, a middle housing 172 and a rear housing 173. The front housing 171, the middle housing 172 and the rear housing 173 are connected in sequence. The male rotor body 120 and the female rotor body 130 are located in the middle housing 172, the air intake port 121 is provided on the front housing 171, and the air discharge port 122 is provided on the rear housing 173. The refrigerant passage inlet 141 is located on the rear housing 173.

[0040] Along the axial direction of the male rotor 102 and the female rotor 103, the male rotor body 120 has an intake end 111 and an exhaust end 113, and the female rotor body 130 also has an intake end 112 and an exhaust end 114. As the male rotor 102 and the female rotor 103 rotate, the refrigerant gas gradually flows from the intake ends 111 and 112 toward the exhaust ends 113 and 114. The volume of the compression space 105 gradually decreases as the male rotor 102 and the female rotor 103 rotate, and the gas in the compression space 105 is gradually compressed. The compressed gas flows from the exhaust ends 113 and 114 to the exhaust port 122 of the compressor.

[0041] Figure 2A yes Figure 1B A three-dimensional diagram of the Zhongyang rotor. Figure 2B yes Figure 2A The side view of the Zhongyang rotor, such as Figure 2A and Figure 2B As shown, the exhaust end 113 of the male rotor 102 has an exhaust end face 203. The exhaust end face 203 includes a center end face 215 and a tooth end face 218, and the center end face 215 and the tooth end face 218 are on the same plane. The tooth end face 218 is formed by a plurality of teeth 168 of the male rotor 102, and the tooth end face 218 has a tooth end face contour line 221, and the tooth end face contour line 221 coincides with the profile line of the male rotor. Each tooth of the male rotor has a tooth top 231 and a tooth bottom 232, wherein the tooth top 231 is farthest relative to the central axis of the screw rotor, and the tooth bottom 232 is closest to the central axis of the screw rotor. The center end face 215 is roughly annular, and the outer side of the center end face 215 coincides with the point of the tooth bottom 232 on the tooth end face contour line 221. Figure 2BIn the figure, the dotted line 285 illustrates the boundary between the center end face 215 and the tooth end face 218. On the tooth end face 218, the tooth bottom 232 is the connection point of two adjacent teeth. The inner side of the center end face 215 is connected to the male rotor connection part 129, and the male rotor connection part 129 is protruding from the exhaust end face 203 and is used to connect with the compressor housing 101. The tooth end face 218 includes a plurality of tooth end face portions 281, each tooth end face portion 281 is formed by the end face of each corresponding tooth, and each tooth end face portion 281 has the same shape. The tooth end face contour line 221 has a plurality of pairs of tooth end face side edges, and each pair of tooth end face side edges 234 and 236 are respectively located on both sides of each tooth end face portion 281, and are arranged along the rotation direction of the male rotor 102. An inter-tooth space 291 is formed between adjacent teeth of the male rotor 102 , and the inter-tooth space 291 can form a part of the compression space 105 together with the housing 101 and the teeth 169 of the female rotor 103 .

[0042] Figure 2C yes Figure 1B A three-dimensional view of the Yin rotor. Figure 2D yes Figure 2C In the side view of the female rotor, similar to the male rotor 102, the exhaust end 114 of the female rotor 103 has an exhaust end face 204, and the exhaust end face 204 includes a center end face 217 and a tooth end face 219. Each tooth of the female rotor 103 also has a tooth top 238 and a tooth bottom 239. Figure 2D In the figure, the dotted line 286 illustrates the boundary between the center end face 217 and the tooth end face 219. The tooth end face 219 has a tooth end face contour line 222. The tooth end face 219 includes a plurality of tooth end face portions 282, each of which is formed by the end face of each tooth, and each of the tooth end face portions 282 has the same shape. The tooth end face contour line 222 at each tooth end face portion 282 has a pair of tooth end face side edges 235 and 237. An inter-tooth space 292 is formed between adjacent teeth of the female rotor 103, and the inter-tooth space 292 can form a part of the compression space 105 with the housing 101 and the teeth 168 of the male rotor 102.

[0043] Combination Figure 1A-Figure 2D, the housing 101 has an exhaust end mating surface 151 and a rotor body mating surface 152. The exhaust end mating surface 151 is formed by one side of the rear housing 173, and the rotor body mating surface 152 is formed by the inner side of the middle housing 172. The outer sides of the male rotor body 120 and the female rotor body 130 in the axial direction are mated with the rotor body mating surface 152, and the exhaust end surfaces 203 and 204 of the male rotor body 120 and the female rotor body 130 are mated with the exhaust end mating surface 151, so that the male rotor body 120 and the female rotor body 130, the exhaust end mating surface 151, and the rotor body mating surface 152 surround the compression space 105. The mating of the exhaust end mating surface 151 and the rotor body mating surface 152 with the male rotor body 120 and the female rotor body 130 means that they are in contact or there is a small gap between the two, so that the compressed gas in the compression space 105 can hardly leak, so that the gas can be compressed.

[0044] Figure 3A yes Figure 1A Another cross-sectional view of the compressor, showing the refrigerant passages, Figure 3B yes Figure 3A A partial enlarged view of the refrigerant channel. Figure 3A As shown, a refrigerant channel 302 is provided in the rear shell 173, and the refrigerant channel has a refrigerant channel inlet 141 and a refrigerant channel outlet 342. The refrigerant channel outlet 342 is arranged on the exhaust end mating surface 151, and the refrigerant channel inlet 141 is arranged on the outer surface of the shell 101. The position of the refrigerant channel outlet 342 is arranged to correspond to the position of the tooth end surface 218 or 219, so that during the rotation of the female rotor 103 and the male rotor 102, the tooth end surface 218 or 219 periodically passes over the refrigerant channel outlet 342. The refrigerant channel 302 includes an outlet section 322 and a main body section 325. The outlet section 322 is formed by extending from the refrigerant channel outlet 342 to the inside of the shell 101. The main body section 325 is connected to the outlet section 322, and the flow area of ​​the main body section 325 is smaller than the flow area of ​​the outlet section 322. When the fluid in the refrigerant channel 302 enters the outlet section 322 from the main body section 325, the flow velocity decreases. In this embodiment, the inner diameter of the outlet section 322 is uniform, so that a step is formed at the connection between the main section 325 and the outlet section 322. In another embodiment, the inner diameter of the outlet section 322 may gradually increase from the inside to the outside. In yet another embodiment, the main section 325 may also have the same flow area as the outlet section 322.

[0045] Figure 4A It is a stereoscopic view of the rear housing and the female rotor of the compressor of the first embodiment of the present application. Figure 4B yes Figure 4A A three-dimensional view of the middle rear shell. It is used to show the relationship between the refrigerant channel outlet 342 and the exhaust end surface 204 of the female rotor 103. Figure 4AIn order to clearly illustrate the relationship between the female rotor 103 and the refrigerant passage outlet 342, the female rotor 103 is arranged to have a certain distance from the rear shell 173 to show the refrigerant passage outlet 342. Inside the compressor 100, the exhaust end surface 204 of the female rotor 103 is arranged adjacent to the exhaust end mating surface 151.

[0046] like Figure 4B As shown, the refrigerant channel outlet 342 is roughly circular, and the inside of the refrigerant channel outlet 342 shows the outline of the main section 325. The area of ​​the refrigerant channel outlet 342 is larger than the cross-sectional area of ​​the main section 325 of the refrigerant channel 302. The refrigerant channel outlet 342 has a pair of outlet side edges 431 and 432, and the outlet side edges 431 and 432 are arranged oppositely along the rotation direction of the female rotor 103. The refrigerant channel outlet 342 is configured to be completely blocked by the tooth end face 219 during the rotation of the female rotor 103. There is a first point 451 on the outlet side edge 431, and a second point 452 on the outlet side edge 432. At the position where the refrigerant channel outlet 342 is completely blocked by the tooth end face 219, the first point 451 and the second point 452 can simultaneously coincide with the tooth end face contour line 222 of the female rotor 103, that is, coincide with the profile line of the female rotor 103. That is to say, at the position where the refrigerant channel outlet 342 is completely blocked by the tooth end face 218, there are at least two points located on the outlet side edges 431 and 432 respectively and these two points coincide with the tooth end face contour line 222. Of course, there may also be multiple points on the outlet side edges 431 and 432 respectively that coincide with the tooth end face contour line 222.

[0047] Figure 5A yes Figure 4B Schematic diagram of the relative position of the refrigerant channel outlet and the tooth end surface at the first moment, Figure 5B yes Figure 4B Schematic diagram of the relative position of the refrigerant channel inlet and the tooth end surface at the second moment, Figure 5C yes Figure 4B The schematic diagram of the relative position of the refrigerant channel inlet and the tooth end surface at the third moment shows the relative position of the female rotor and the refrigerant channel inlet during the rotation process. Figure 5A-5C In FIG. 1 , a portion of the tooth end face contour line 222 of the female rotor is shown by a dotted line.

[0048] like Figures 5A-5C As shown, at the first moment, Figure 5AAs shown, in the counterclockwise direction, the outlet side edge 431 of the refrigerant channel outlet 342 is located downstream of the tooth end face side edge 235 of the female rotor 103, and the outlet side edge 432 of the refrigerant channel outlet 342 is located downstream of the tooth end face side edge 237 of the female rotor 103. Thus, the portion of the refrigerant channel outlet 342 close to the outlet side edge 431 is blocked by the tooth end face 219, and the portion of the refrigerant channel outlet 342 close to the outlet side edge 432 is staggered from the tooth end face 219 and outwardly exceeds the tooth end face 219, so that the refrigerant channel outlet 342 is connected to the compression space 105 between the two teeth near the outlet side edge 432, and the refrigerant in the refrigerant channel 302 can enter the compression space 105.

[0049] At the second moment, Figure 5B As shown, the outlet side edge 431 of the refrigerant channel outlet 342 partially overlaps with the tooth end surface side edge 235 of the female rotor 103, and at the same time, the outlet side edge 432 of the refrigerant channel outlet 342 partially overlaps with the tooth end surface side edge of the female rotor 103. The refrigerant channel outlet 342 is completely blocked by the tooth end surface 219, and the refrigerant in the refrigerant channel 302 cannot enter the compression space 105.

[0050] At the third moment, Figure 5C As shown, in the counterclockwise direction, the outlet side edge 431 of the refrigerant channel outlet 342 is located upstream of the tooth end face side edge 235 of the female rotor 103, and the outlet side edge 432 of the refrigerant channel outlet 342 is located upstream of the tooth end face side edge 237 of the female rotor 103. Therefore, the portion of the refrigerant channel outlet 342 close to the outlet side edge 431 is staggered with the tooth end face 219 and outwardly exceeds the tooth end face 219, and the portion of the refrigerant channel outlet 342 close to the outlet side edge 432 is blocked by the tooth end face 219, so that the refrigerant channel outlet 342 is connected to the compression space 105 between the two teeth near the outlet side edge 431, and the refrigerant in the refrigerant channel 302 can enter the compression space 105.

[0051] In the present application, the shape of the refrigerant channel outlet 342 is set so that the female rotor 103 is rotated only when Figure 5BThe second moment shown is completely blocked by the tooth end surface 218, and the total time used in the second moment accounts for a very small proportion in the process of one rotation of the female rotor 103, for example, less than 0.1% or lower. In other words, during the rotation of the female rotor 103, the refrigerant channel outlet 342 is connected to the compression space 105 most of the time, which makes the process of the refrigerant channel 302 providing refrigerant to the female rotor 103 and the male rotor 102 close to a continuous process. This allows the refrigerant in the economizer system to be provided to the compression space 105 as much as possible, increasing the amount of refrigerant involved in compression in the compressor per unit time, thereby improving the working efficiency of the compressor. And after many experiments and observations by the inventor, it is found that during one rotation of the male rotor 102 and the female rotor 103, if the refrigerant channel outlet 342 is intermittently connected and disconnected with the compression space 105, that is, the time when the refrigerant channel outlet 342 is completely blocked by the tooth end faces 218 and 219 accounts for a large proportion of one rotation of the male rotor 102 and the female rotor 103, it is easy to cause additional pressure fluctuations in the refrigerant channel 302 due to periodic blockage of the refrigerant channel outlet 342, thereby causing the compressor 100 to generate certain noise. The solution provided in this application can reduce this part of the noise. In addition, the refrigerant channel 302 in this application can make the process of providing refrigerant close to a continuous process, and also make the operation process of the male rotor 102 and the female rotor 103 more stable. During the operation of the compressor 100, the pressures in the two adjacent compression spaces 105 are different. In the present application, during the entire rotation process of the female rotor 103, the refrigerant channel outlet 342 can only be connected to one compression space 105, but cannot be connected to two adjacent compression spaces 105 at the same time. Therefore, the two adjacent compression spaces 105 will not be connected to the fluid through the refrigerant channel outlet 342, so no leakage will occur, thereby avoiding affecting the working efficiency of the compressor 100.

[0052] Fig. 6A It is a stereoscopic view of the rear housing and the female rotor of the compressor of the second embodiment of the present application. Figure 6B yes Fig. 6A A perspective view of the center rear housing. Fig. 6A and 6B The embodiment shown is Figure 4A and 4B The embodiment shown is similar, except that the shape of the refrigerant channel outlet 642 is different. Fig. 6A In order to clearly illustrate the relationship between the female rotor 103 and the refrigerant passage outlet 642, the female rotor 103 is arranged to have a certain distance from the rear shell 173 to show the refrigerant passage outlet 642. Inside the compressor 100, the exhaust end surface 204 of the female rotor 103 is arranged adjacent to the exhaust end mating surface 151.

[0053] like Figure 6B As shown, the refrigerant channel outlet 642 is an irregular shape, a part of the contour line of the refrigerant channel outlet 642 is roughly consistent with the shape of the profile line of the tooth of the female rotor, the inner ring 680 of the refrigerant channel outlet 642 shows the contour of the main section 325, and the area of ​​the refrigerant channel outlet 642 is greater than the cross-sectional area of ​​the main section 325 of the refrigerant channel 302. The refrigerant channel outlet 642 has a pair of outlet side edges 631 and 632, and the outlet side edges 631 and 632 are arranged relatively along the rotation direction of the female rotor 103. The arrangement of the refrigerant channel outlet 642 enables the refrigerant channel outlet 642 to be completely blocked by the tooth end face 219 during the rotation of the female rotor 103. At the position where the refrigerant channel outlet 642 is completely blocked by the tooth end face 219, the outer contour of the refrigerant channel outlet 342 coincides with the tooth end face contour line 222 of the male rotor 102, that is, coincides with the profile line of the male rotor 102. That is to say, at the position where the refrigerant channel outlet 642 is completely blocked by the tooth end face 219 , a pair of outlet side edges 631 and 632 coincide with the tooth end face contour line 222 , and the outlet side edges 631 and 632 also coincide with a pair of tooth end face side edges 235 , 237 . Fig. 6A and Figure 6B The embodiment shown can achieve Figure 4A and Figure 4B The same technical effect as the embodiment shown.

[0054] Apart from Figure 4A-4B and Figure 6A-6B In addition to the embodiments shown, the refrigerant channel outlet may also be in other shapes, as long as it can satisfy the requirement that when the refrigerant channel outlet is completely blocked, at least two points on a pair of outlet side edges respectively coincide with a pair of tooth end surface side edges. The refrigerant channel outlet may be arranged to correspond to the male rotor or the female rotor. Furthermore, there may be multiple refrigerant channels, corresponding to different teeth in the male rotor or the female rotor respectively.

[0055] Fig. 7A It is a stereoscopic view of the rear shell of the compressor of the third embodiment of the present application. Figure 7B is a stereoscopic diagram of the male rotor in the third embodiment of the present application, Figure 7C yes Figure 7B A side view of the Zhongyang rotor. Figures 7A-7C The embodiment shown is Figure 4A-4B The illustrated embodiment is similar, except that the shape of the tooth end faces is different from the shape of the refrigerant channel outlet.

[0056] like Fig. 7AAs shown, the dashed line indicates the shape of the profile line 708 of the male rotor. The refrigerant passage outlet 742 is generally circular, and the area of the refrigerant passage outlet 742 is smaller than the area of the region defined by the profile line of the male rotor. A certain distance can be formed between the outer sides of the refrigerant passage outlet 742 and the profile line 708 of the male rotor. The refrigerant passage outlet 742 has a pair of outlet side edges 731 and 732, and the outlet side edges 731 and 732 are oppositely arranged and disposed along the rotation direction of the male rotor 102. In this embodiment, the inner diameter of the outlet section of the refrigerant passage is the same as that of the main body section.

[0057] As Figure 7B and 7C shown, the tooth end face 718 of the male rotor 102 has a tooth end face profile line 721, and the tooth end face profile line 721 has a pair of tooth end face side edges 743 and 744 arranged along the rotation direction of the male rotor 102. Each tooth of the exhaust end 113 of the male rotor 102 includes a pair of drainage grooves 705 and 706. Each of the drainage grooves 705 and 706 is recessed inward from the plane where the exhaust end face 203 is located. That is to say, the plane where the bottom of the drainage grooves 705 and 706 is located is lower than the plane where the exhaust end face 203 is located. The drainage grooves 705 and 706 are respectively located on both sides of the tooth tip 231 of a tooth of the male rotor. The drainage groove 705 has an open end 745 communicating with the tooth space and a closed end 746 opposite to the open end 745. The drainage groove 706 has an open end 748 communicating with the tooth space and a closed end 747 opposite to the open end 748. There is a certain distance between the closed end 746 and the closed end 747, so that the drainage grooves 705 and 706 cannot communicate with each other.

[0058] The tops of the drainage grooves 705 and 706 form groove profile lines 761 and 762 on the exhaust end face 203, and the groove profile lines 761 and 762 constitute a part of the tooth end face profile line 721. That is to say, a part of the tooth end face profile line 721 coincides with the profile line of the male rotor 102, and the other part coincides with the groove profile lines 761 and 762. The groove profile lines 761 and 762 include groove closed end profile lines 768 and 769 corresponding to the closed ends 746 and 747, and the groove closed end profile lines 768 and 769 form deviation segments 753, 754 of the tooth end face profile line 721. The deviation segments 753 and 754 deviate inward from the profile line of the tooth of the male rotor.

[0059] In Figure 7C, the shape of the refrigerant channel outlet 742 is indicated by a dotted line. The shapes of the deviated sections 753 and 754 match the shape of the refrigerant channel outlet 742, and during the rotation of the male rotor 102, the refrigerant channel outlet 742 can be completely blocked by the tooth end face 718. At the position where the refrigerant channel outlet 742 is completely blocked by the tooth end face 718, a pair of outlet side edges 731 and 732 of the refrigerant channel outlet 742 coincide with the groove closed end contour lines 768 and 769 of the male rotor 102. In other words, at the position where the refrigerant channel outlet 742 is completely blocked by the tooth end face 718, a pair of outlet side edges 731 and 732 both coincide with the deviated sections 753, 754 of the tooth end face contour line 721. When the outlet side edge 731 of the refrigerant channel outlet 742 deviates from the deviated segment 753 of the tooth end face contour line 721 in the clockwise direction, the refrigerant channel outlet 742 is connected with the compression space 105 through the drainage groove 705, and the refrigerant in the refrigerant channel can enter the compression space 105. When the deviated segment 754 of the tooth end face contour line 721 deviates from the outlet side edge 732 of the refrigerant channel outlet 742 in the clockwise direction, the refrigerant channel outlet 742 is connected with the compression space 105 through the drainage groove 706. On each tooth at the exhaust end 113, the drainage grooves 705 and 706 have the same shape and relative position, so that when the tooth end face portion corresponding to each tooth passes through the refrigerant channel outlet, the refrigerant channel can overlap with the corresponding deviated segments 753 and 754. Figures 7A-7C In the embodiment shown, during one rotation of the male rotor 102, the refrigerant channel outlet 742 is disconnected from the compression space 105 only at a specific moment, which can also achieve a process of nearly continuous supply of refrigerant, and can achieve Figure 4A and Figure 4B The same technical effect as the embodiment shown.

[0060] In other embodiments of the present application, only one point on the outlet side edges 731 and 732 at the position where the refrigerant channel outlet 742 is completely blocked by the tooth end face 718 needs to overlap with the deviation sections 753 and 754 respectively. The drainage groove in the present application can also be arranged on the female rotor 103 to cooperate with the refrigerant channel outlet at the female rotor 103. There can also be multiple refrigerant channels, corresponding to different teeth respectively. In another embodiment, the drainage groove can extend obliquely from the closed end to the open end toward the inside of the male rotor, so that the closed end is flush with the exhaust end face and the open end is lower than the exhaust end face.

[0061] Fig. 8A It is a stereoscopic view of the rear shell of the compressor of the fourth embodiment of the present application. Figure 8B It is a stereoscopic diagram of the female rotor of the fourth embodiment of the present application. Figures 8A-8B The embodiment shown is Figure 7A-7BThe embodiment shown is similar, except that the drainage grooves are arranged on the female rotor and each tooth corresponds to a drainage groove.

[0062] like Fig. 8A As shown, the dotted line represents the shape of the profile 808 of the female rotor, the refrigerant channel outlet 842 is roughly circular, the area of ​​the refrigerant channel outlet 842 is smaller than the area of ​​the area defined by the profile of the female rotor, and the outer side of the refrigerant channel outlet 842 can form a certain distance from the profile 808 of the female rotor. The refrigerant channel outlet 842 has a pair of outlet side edges 831 and 832, and the outlet side edges 831 and 832 are arranged oppositely and arranged along the rotation direction of the female rotor 103. In this embodiment, the outlet section of the refrigerant channel has the same inner diameter as the main body section.

[0063] like Figure 8B As shown, the tooth end face 819 of the female rotor 103 has a tooth end face contour line 822, and the tooth end face contour line 822 has a pair of tooth end face side edges 843 and 844 arranged in the rotation direction of the female rotor 103. Each tooth of the exhaust end 114 of the female rotor 103 includes a drainage groove 805, which is formed by being recessed inward from the plane where the exhaust end face 204 is located, that is, the plane where the bottom of the drainage groove 805 is located is lower than the plane where the exhaust end face 204 is located. The drainage groove 805 is located on one side of the tooth top 238 of the tooth of the female rotor 103. The drainage groove 805 has an open end 845 connected to the inter-tooth space and a closed end 846 opposite to the open end 845, and there is a certain distance between the closed end 846 and the tooth end face contour line 822.

[0064] The top of the drainage groove 805 forms a groove contour line 861 on the exhaust end surface 204, and the groove contour line 861 constitutes a part of the tooth end surface contour line 822. That is, a part of the tooth end surface contour line 822 coincides with the profile line of the female rotor 103, and the other part of the groove contour line 861. The groove contour line 861 includes a groove closed end contour line 868 corresponding to the closed end 846, and the groove closed end contour line 868 forms a deviation section 853 of the tooth end surface contour line 822. The deviation section 853 deviates inwardly from the profile line of the tooth of the female rotor 103.

[0065] The shape of the deviated section 853 matches the shape of the refrigerant channel outlet 842, and during the rotation of the female rotor 103, the refrigerant channel outlet 842 can be completely blocked by the tooth end face 819. At the position where the refrigerant channel outlet 842 is completely blocked by the tooth end face 819, a pair of outlet side edges 831 and 832 of the refrigerant channel outlet 842 respectively coincide with the groove closed end contour line 868 of the female rotor 103 and the tooth end face side edge 844. In other words, at the position where the refrigerant channel outlet 842 is completely blocked by the tooth end face 819, a pair of outlet side edges 831 and 832 coincide with the deviated section 853 of the tooth end face contour line 822 and the tooth end face side edge 844. When the outlet side edge 831 of the refrigerant channel outlet 842 deviates from the deviation section 853 of the tooth end face contour line 822 in the clockwise direction, the refrigerant channel outlet 842 is connected with the compression space 105 through the drainage groove 805, and the refrigerant in the refrigerant channel can enter the compression space 105. When the tooth end face side edge 844 of the tooth end face contour line 822 deviates from the outlet side edge 832 of the refrigerant channel outlet 842 in the clockwise direction, the refrigerant channel outlet 842 is directly connected with the compression space 105. On each tooth of the female rotor 103, the drainage groove 805 has the same shape and position, so that when the tooth end face portion corresponding to each tooth passes through the refrigerant channel outlet, the refrigerant channel outlet 842 can coincide with the corresponding deviation section 853 and the tooth end face side edge 844. Figures 8A-8B In the embodiment shown, during one rotation of the female rotor 802, the refrigerant channel outlet 842 is disconnected from the compression space 105 only at a specific moment, which can also achieve nearly continuous supply of refrigerant, and can achieve Figure 4A and Figure 4B The same technical effect as the embodiment shown.

[0066] In other embodiments of the present application, only one point on the outlet side edges 831 and 832 at the position where the refrigerant channel outlet 842 is completely blocked by the tooth end face 819 needs to overlap with the deviation section 853 and the tooth end face side edge 844. The drainage groove in the present application can also be arranged on the male rotor 102 to cooperate with the refrigerant channel outlet at the male rotor 102.

[0067] In the present application, there may be multiple refrigerant channels, and the refrigerant channel outlets of the multiple refrigerant channels correspond to different teeth respectively. More refrigerant channels enable the economizer system to provide more refrigerant to the compression space per unit time, which is beneficial to improving the working efficiency of the compressor.

[0068] The arrangement of the refrigerant channel outlet and the arrangement of the female rotor and the male rotor in the present application can enable the economizer system to nearly continuously supply refrigerant to the compression space, thereby improving the working efficiency of the compressor. At the same time, it can reduce unnecessary pressure fluctuations, reduce the noise of the compressor, and ensure the smooth operation of the compressor. In addition, the design scheme in the present application is simple in structure and easy to process.

[0069] Although only some features of the present application have been illustrated and described herein, various modifications and changes may be made to those skilled in the art. Therefore, it should be understood that the appended claims are intended to cover all the above modifications and changes that fall within the spirit and scope of the present application.

Claims

1. A compressor, Features include: A female rotor and a male rotor, each of which has a plurality of teeth, each of which can rotate around its own axis and mesh with the plurality of teeth to compress the refrigerant, each of which has an exhaust end, the exhaust end having an exhaust end surface, the plurality of teeth forming corresponding tooth end surfaces on the exhaust end surface, and the tooth end surfaces are defined by tooth end surface contour lines; A housing, wherein the female rotor and the male rotor are arranged in the housing, and the housing has an exhaust end mating surface, and the exhaust end surface of the exhaust end is matched with the exhaust end mating surface to form a compression space together with the female rotor and the male rotor and other parts of the housing; At least one refrigerant channel, the at least one refrigerant channel is in communication with a compressor economizer system, the at least one refrigerant channel is configured to deliver the refrigerant in the economizer system to the compression space, each of the at least one refrigerant channel has a refrigerant channel outlet, the refrigerant channel outlet is arranged on the exhaust end mating surface corresponding to one of the female rotor and the male rotor, and the refrigerant channel outlet has a pair of outlet side edges arranged along the rotation direction of the corresponding one of the female rotor and the male rotor; In which, the refrigerant channel outlet and the tooth end face contour line of the tooth end face are configured as follows: during the rotation of the female rotor or the male rotor, the refrigerant channel outlet can be completely blocked by the tooth end face of the corresponding one of the female rotor or the male rotor, and the pair of outlet side edges can at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor at the same time.

2. The compressor according to claim 1, Features: During the rotation of the female rotor or the male rotor, at the moment when the pair of outlet side edges at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor, the refrigerant channel outlet is completely blocked by the tooth end face of the corresponding one of the female rotor or the male rotor.

3. The compressor according to claim 1, Features: The tooth end face contour line is consistent with the profile line of the teeth of the corresponding one of the female rotor and the male rotor.

4. The compressor according to claim 3, Features: The contour lines of the pair of outlet side edges are consistent with the profile lines of the teeth of the corresponding one of the female rotor and the male rotor.

5. The compressor according to claim 1, Features: The tooth end face contour line has a pair of tooth end face side edges arranged along the rotation direction of the corresponding one of the female rotor and the male rotor, at least one of the pair of tooth end face side edges has a deviation section, and the deviation section deviates inwardly from the profile line of the corresponding tooth; Wherein, when the pair of outlet side edges at least partially coincide with the tooth end face contour line of the corresponding one of the female rotor or the male rotor at the same time, at least one of the pair of outlet side edges coincides with at least one of the corresponding pair of tooth end face side edges at the deviation section.

6. The compressor according to claim 5, Features: The exhaust ends of the female rotor and the male rotor also include at least one drainage groove, each of which is formed by being recessed inward from the plane where the exhaust end surface is located, and each of which has an open end connected to the inter-tooth space and a closed end opposite to the open end. The top of the drainage groove forms a groove contour line on the exhaust end surface, and the groove contour line includes a groove closed end contour line corresponding to the closed end, and the deviation section of the side edges of the pair of tooth end surfaces is formed by the groove closed end contour line.

7. The compressor according to claim 6, Features: The at least one drainage groove comprises a pair of drainage grooves, the pair of drainage grooves are respectively located on both sides of the tooth top of a tooth, and a pair of outlet side edges of the refrigerant channel outlet can at least partially coincide with the groove closed end contour lines of the pair of drainage grooves at the same time.

8. The compressor according to claim 6, Features: The at least one drainage groove includes a drainage groove located on one side of the tooth top of the corresponding tooth, and one of a pair of outlet side edges of the refrigerant channel outlet can at least partially coincide with a groove closed end contour line of the one drainage groove.

9. The compressor according to claim 1, Features: Each of the at least one refrigerant passage includes an outlet section extending from the refrigerant passage outlet toward the interior of the shell.

10. The compressor according to claim 9, Features: The at least one refrigerant channel includes a plurality of refrigerant channels, refrigerant channel outlets of a portion of the plurality of refrigerant channels correspond to the tooth end surface of the female rotor, and refrigerant channel outlets of another portion of the refrigerant channels correspond to the tooth end surface of the male rotor.

Images