CN219492577U - Fluid delivery device and compressor comprising same - Google Patents

Abstract

The present utility model relates to a fluid delivery device and a compressor including the same. In one aspect, a fluid delivery device for a compressor is provided. The compressor comprises an outer housing and an inner member, and the fluid delivery device is adapted to deliver fluid from outside the compressor to the inner member. The fluid delivery device includes: a first connector for connection with the outer housing; a second connector for connection with the inner member; and an intermediate connecting member for connecting the first connecting member and the second connecting member. The second connector has a through-hole through which the intermediate connector can pass such that a first end of the intermediate connector can be connected with the first connector and a second end of the intermediate connector can be connected with the second connector, thereby defining a fluid transfer passage from the first connector to the intermediate connector to the second connector. According to the utility model, the convenient and reliable installation of the fluid conveying device can be realized, and the assembly process parameters can be met.

Description

Fluid delivery device and compressor comprising same

Technical Field

The present utility model relates to the field of compressors, and in particular, to a fluid delivery device improved in terms of an assembled structure and a compressor including the same.

Background

This section provides background information related to the present utility model, which does not necessarily constitute prior art.

The enhanced vapor injection technology is widely applied to compressors (e.g., scroll compressors) in which a part of fluid (refrigerant) having an intermediate pressure is sucked through an intermediate pressure suction hole and is mixed with a main refrigerant having undergone partial compression to be recompressed, thereby realizing two-stage compression with a single compressor, increasing the flow rate of the refrigerant in the condenser, and increasing the enthalpy difference of a main circulation loop, thereby improving the heating capacity in a low-temperature environment, and thus greatly improving the efficiency of the compressor.

An enthalpy-increasing injection device in a scroll compressor is a device for injecting fluid from an enthalpy-increasing injection fluid source (e.g., an economizer or flash tank) in a refrigerant circuit back into a scroll compression chamber of a scroll compression mechanism.

The related art enthalpy injection device generally includes a first elbow, which is generally fixedly connected to a compressor housing to form a single piece, a second elbow, which is required to be installed, for example, when assembling a compressor, to be fixedly connected to a fixed scroll of a scroll compression mechanism, and an intermediate connection connecting the two elbows. In assembly, the intermediate connection is first inserted into the first elbow, then the second elbow is sleeved on the intermediate connection, and finally the second elbow is connected to the already assembled compressor element (in particular, the non-orbiting scroll) by means of a threaded connection. The enthalpy injection device of the related art has a problem in that in the case where a screw connection fixing point of the enthalpy injection device and the fixed scroll is lower than the top end of the compressor housing (particularly, the housing body), an installation tool needs to be inserted into a receiving space inside the compressor housing for installation, and at this time, the installation tool is inconvenient to enter a space between the fixed scroll and the compressor housing, thereby causing inconvenience in installation.

Disclosure of Invention

The present utility model provides a fluid delivery device, and in particular, an enthalpy-increasing jet device, which can solve or alleviate the above-mentioned problems in the related art.

In particular, it is an object of the present utility model to provide a fluid transfer device that enables a convenient, reliable connection between the second connection piece and the fixed scroll that meets the assembly process parameters.

Another object of the present utility model is to provide a fluid delivery device that can save installation space.

Another object of the present utility model is to provide a fluid delivery device capable of avoiding interference of parts so as to make the overall size of the compressor more compact without losing the size of the compression mechanism.

It is a further object of the present utility model to provide a fluid delivery device that avoids fluid flow from the compression mechanism.

According to a first aspect of the present utility model, a fluid delivery device for a compressor is provided. The compressor includes an outer housing and an inner member accommodated in an accommodation space of the outer housing, and the fluid delivery device is adapted to deliver fluid from an outside of the compressor to the inner member. The fluid delivery device includes: a first connector for connection with the outer housing; a second connector for connection with the inner member; and an intermediate connecting piece for connecting the first connecting piece and the second connecting piece. The second connector has a through hole through which the intermediate connector can pass such that a first end of the intermediate connector can be connected with the first connector and a second end of the intermediate connector can be connected with the second connector, thereby forming a fluid transfer passage from the first connector to the intermediate connector to the second connector.

In the above fluid delivery device, the second end portion of the intermediate connector is accommodated in the through hole, and the second connector includes a second connector body and a blocking member, the through hole is provided in the second connector body, and at least a part of the blocking member is mounted in the through hole to close the through hole.

In the above fluid delivery device, the second connector body has a first section for receiving the blocking member and a second section for receiving the second end of the intermediate connector.

In the fluid transport device, a check valve is provided inside the second connector.

In the above fluid delivery device, the check valve is partially or entirely disposed inside the blocking member.

In the above-described fluid delivery device, the blocking member includes a head portion mounted to the through-hole and a plurality of separate legs extending from the head portion and forming flow passages for fluid therebetween.

In the above-described fluid delivery device, a tip of each of the plurality of legs and a tip of the second end of the intermediate connector are spaced apart from each other.

In the above-described fluid delivery device, a check valve is provided between the plurality of legs.

In the above fluid delivery device, the check valve may be in a sheet shape or a plunger shape having a tapered shape near an end of the intermediate connection member.

In the above fluid delivery device, the check valve is movable between the head of the occluding member and the tip of the second end of the intermediate connector to allow fluid to flow into the inner member via the fluid delivery device but to prevent fluid from flowing out of the inner member via the fluid delivery device.

In the above-described fluid transport device, the fluid transport device may have a substantially L-shape.

In the above fluid delivery device, the first connector has a first section and a second section intersecting the first section of the first connector, the first section of the first connector has a first bore and the second section of the first connector has a second bore intersecting the first bore, the second bore is for receiving the first end of the intermediate connector, and an angle between an axis of the first bore and an axis of the second bore is greater than 90 degrees.

In the above-described fluid transport device, the second connector may have a second connector mounting surface for engagement with the inner member, and an angle between an axis of the through hole and the second connector mounting surface may be an acute angle.

In the above fluid transfer device, a seal is provided between the first end of the intermediate connector and the first connector and/or between the second end of the intermediate connector and the second connector.

In the above-described fluid delivery device, the fluid delivery device is an enthalpy-increasing injection device for delivering an enthalpy-increasing injection fluid from an enthalpy-increasing injection fluid source.

According to a second aspect of the present utility model, a compressor is provided. The compressor comprises a fluid delivery device as described above.

In the above compressor, the compressor is a scroll compressor including the outer housing and a non-orbiting scroll serving as the inner member.

In the above compressor, the fixed scroll has a fixed scroll mounting surface, the second connecting member is fixed to the fixed scroll in a state where the second connecting member mounting surface of the second connecting member is fitted to the fixed scroll mounting surface, the outer housing includes a housing body and a top cover connected to a top end of the housing body, and a fixing point of the second connecting member to the fixed scroll is lower than the top end of the housing body.

According to the fluid transfer device of the present utility model, since the second connection member has the through hole through which the intermediate connection member passes, it is not necessary to extend an installation tool into the receiving space between the housing body of the outer housing and the fixed scroll, but it is possible to connect the second connection member to the fixed scroll before assembling the fixed scroll in the inner space of the compressor, so that the installation of the fluid transfer device of the present utility model is not limited to the positional relationship of the installation position (fixing point) of the connection member (e.g., screw connection member) connecting the second connection member body to the fixed scroll with respect to the open end of the housing body. That is, whether the installation position is located inside the accommodation space of the housing body or outside the accommodation space of the housing body (i.e., whether the installation position (fixing point) is lower or higher than the top end of the housing body), a convenient, reliable connection between the second connector body and the fixed scroll, which satisfies the assembly process parameters, can be achieved.

Drawings

The drawings show by way of example only some embodiments of the related art and the inventive technique, but the utility model is not limited to the embodiments shown in the drawings.

Fig. 1 is a sectional view showing a fluid delivery device according to the related art.

Fig. 2 is a cross-sectional view of a first elbow of a fluid delivery device according to the related art.

Fig. 3 is a cross-sectional view showing a fluid delivery device according to the present utility model.

Fig. 4 is a cross-sectional view of a first connector of a fluid delivery device according to the present utility model.

Fig. 5 is a cross-sectional view of a second connector of a fluid delivery device according to the present utility model.

Fig. 6 is a perspective view of a second connector of the fluid delivery device according to the present utility model.

Fig. 7 is a view of an occluding member according to the present utility model wherein (a) is a perspective view, (b) is a side view and (c) is a top view.

Detailed Description

The present utility model provides a fluid delivery device adapted to deliver fluid (such as refrigerant) from the exterior of a compressor to an internal component of the interior of the compressor (such as a scroll compression mechanism or a non-orbiting scroll of a scroll compression mechanism). The fluid delivery device of the present utility model has advantages such as easier installation than the fluid delivery device of the related art. Hereinafter, various improvements of the present utility model will be described in connection with the specific structure of the fluid delivery device in the related art as well as in the present utility model.

Hereinafter, a fluid delivery device 1 in the related art (comparative technique) will be described with reference to fig. 1 to 2, and a fluid delivery device 3 in the present utility model will be described with reference to fig. 3 to 7.

Fig. 1 to 2 show a fluid delivery device 1 in the related art. The fluid delivery device 1 may be used in a compressor (particularly a scroll compressor) to deliver fluid (such as refrigerant) from the exterior of the compressor to an internal component of the compressor (particularly a scroll compression mechanism or a non-orbiting scroll of the scroll compression mechanism). In particular, the fluid delivery device 1 may be used as an enthalpy-increasing injection device, i.e. for injecting an enthalpy-increasing injection fluid from a source of enthalpy-increasing injection fluid in a refrigerant circuit (such as an economizer or flash tank) into a medium pressure compression chamber of a scroll compression mechanism.

The fluid delivery device 1 is substantially Z-shaped and comprises a first elbow 11, an intermediate connection 12 and a second elbow 13. The first bend 11 is a bend that is farther from the open end 21 of the housing body 14a of the outer housing 14 than the second bend 13 in terms of the axial direction of the intermediate connection member 12, i.e., the second bend 13 is a bend that is closer to the open end 21 than the first bend 11 in terms of the axial direction of the intermediate connection member 12. The first elbow 11 is typically fixedly attached (e.g., welded) to the outer housing 14. The first bend 11 has a first section 17 and a second section 18 perpendicular to the first section 17, wherein the first section 17 and the second section 18 each have an inner bore, and the inner bores of the first section 17 and the second section 18 are perpendicular as shown in fig. 2. The second bend 13 has a first section 19 and a second section 20, the first section 19 and the second section 20 each having an internal bore.

The second elbow 13 is provided with lugs and a threaded connection is threaded through holes in the lugs into mounting holes in the inner member 15 to connect the second elbow 13 to the inner member 15. Generally, in assembling the compressor, it is necessary to first mount the first elbow 11 on the outer casing 14, then insert the intermediate connection 12 into the inner hole of the second section 18 of the first elbow 11, then align the second section 20 of the second elbow 13 with the intermediate connection 12, then fit the second section 20 of the second elbow 13 over the intermediate connection 12, and finally connect the second elbow 13 to the inner member 15 already assembled in the receiving space of the outer casing 14 using a screw connection.

When the position of the mounting hole in the inner member 15 (i.e., the fixing point of the second elbow 13 to the inner member 15) is lower than the top end of the housing body 14a, particularly when the axis of the threaded connector mounted in the mounting hole is lower than the top end of the housing body 14a, as shown in fig. 1, the mounting tool (such as a screwing tool) cannot enter the inside of the housing body 14a due to the narrow space between the housing body 14a and the inner member 15, so that the threaded connector can only be manually screwed, so that the pre-tightening torque cannot meet the process requirement and cannot meet the assembly process parameters.

Of course, it is conceivable to assemble the inner member 15 to which the second elbow 13 is fixed in the accommodating space of the outer housing 14 after connecting the second elbow 13 to the inner member 15. In this case, the threaded connection can be screwed with an installation tool. However, when the inner member 15 to which the second elbow 13 is fixed is assembled into the receiving space of the outer housing 14, it is ensured that both the inner hole of the second elbow 13 is aligned with the intermediate connection member 12 and the mounting hole of the inner member 15 (non-orbiting scroll) is aligned with the mounting hole of the main bearing housing of the compressor, which increases the difficulty of installation and cannot ensure the quality of installation.

In view of the above-described problems in the related art, the present utility model provides an improved fluid delivery device capable of achieving a convenient, reliable connection satisfying assembly process parameters even when the installation position of a connection member (e.g., a screw connection member) is located inside the housing body 14a (i.e., below the top end of the housing body 14 a).

Hereinafter, the fluid delivery device 3 in the present utility model will be described with reference to fig. 3 to 7.

In an exemplary embodiment, the fluid transfer device 3 may be used in a scroll compressor. The scroll compressor includes an outer housing 14 and a scroll compression mechanism. The outer housing 14 includes a housing body 14a and a top cover 14b connected at a top end of the housing body, thereby defining an inner space. The scroll compression mechanism is disposed in the interior space. The scroll compression mechanism includes a fixed scroll 15 (corresponding to an internal member according to the present utility model) and an orbiting scroll, the fixed scroll 15 and the orbiting scroll together defining a series of compression chambers to compress a working fluid (refrigerant/refrigerant).

Referring to fig. 3, the fluid delivery device 3 of the present utility model includes a first connector 31, an intermediate connector 32, and a second connector 33. The intermediate connection member 32 has a first end 321 and a second end 322, the first end 321 being for connection with the first connection member 31 and the second end 322 being for connection with the second connection member 33 such that the first connection member 31 and the second connection member 33 are connected to each other by means of the intermediate connection member 32. Thus, the fluid transfer device 3 defines a fluid transfer passage from the first connection to the intermediate connection to the second connection to transfer fluid from the exterior of the scroll compressor to the non-orbiting scroll 15 (in particular, to the interior of the scroll compression mechanism via passages/windows in the non-orbiting scroll 15). In a particular example, the fluid delivery device 3 is implemented as an enthalpy-increasing injection device for delivering an enthalpy-increasing injection fluid from a source of the enthalpy-increasing injection fluid, such as an economizer or flash tank located in a refrigerant cycle, to deliver the enthalpy-increasing injection fluid to the non-orbiting scroll 15 and thereby to the medium pressure compression chambers of a series of compression chambers in a scroll compression mechanism via passages in the non-orbiting scroll 15. However, it should be noted that in other examples, the fluid delivery device 3 may also be used to deliver other fluids than the enhanced vapor injection fluid or may deliver other internal components than the non-orbiting scroll 15, for example, in the case of a high pressure side scroll compressor, the fluid delivery device 3 may be used to deliver the main working fluid to the suction window of the scroll compression mechanism.

The first connection member 31 is a connection member that is farther from the open end of the housing body 14a of the outer housing 14 than the second connection member 33 in the axial direction of the intermediate connection member 32, that is, the second connection member 33 is a connection member that is closer to the open end of the housing body 14a of the outer housing 14 than the first connection member 31 in the axial direction of the intermediate connection member 32. Thus, when the outer housing 14 shown in fig. 3 is placed perpendicular to the ground, the first connection member 31 is a connection member located at the lower portion, and the second connection member 33 is a connection member located at the upper portion. The outer housing 14 is not limited to being placed perpendicular to the ground, as the case may be, but may be placed at any desired angle.

Referring to fig. 4, the first connector 31 has a first section 311 and a second section 312, the second section 312 having a second bore 314 therein for receiving a first end 321 of the intermediate connector 32, thereby effecting connection of the first connector 31 to the intermediate connector 32. Here, it should be noted that in other examples, the first end 321 of the intermediate connection 32 may be configured such that it encases the second section 312 of the first connection 31, in such a way that the connection of the first connection 31 to the intermediate connection 32 and the fluid communication between the two may also be achieved.

Referring to fig. 5, the second connector 33 has a second connector body 34 and a blocking member 35. The second connector body 34 has a through hole 36 inside and the second connector body 34 has a first section 331 and a second section 332, the first section 331 for receiving at least a portion of the blocking member 35 and the second section 332 for receiving the second end 322 of the intermediate connector 32.

Preferably, the occluding member 35 includes a head 352 and a plurality of separate legs 351. At least a portion of the head 352 of the closure member 35 may be provided with external threads and at least a portion of the through bore 36 of the second connector body 34 at the first section 331 may be provided with internal threads, such that the closure member 35 and the second connector body 34 are connected to each other by a threaded connection. By means of the threaded connection, the blocking member 35 can be fixed to the second connector body 34 conveniently and reliably. Alternatively, the blocking member 35 and the second connector body 34 may also be connected to each other by means of a welded or interference connection, by means of which a seal between the blocking member 35 and the second connector body 34 may be dispensed with while still being able to ensure a sealed blocking of the upper port of the through hole 36 by the blocking member 35.

Preferably, the end of the second section 312 of the first connector 31 for receiving the first end 321 of the intermediate connector 32 and the end of the second section 332 of the second connector 32 for receiving the second end 322 of the intermediate connector 32 may each be provided with a chamfer to facilitate insertion of the intermediate connector 32 therein. Accordingly, the ends of the first and second ends 321, 322 of the intermediate connector 32 are provided in a tapered form to facilitate insertion into the second sections 312, 332 of the first and second connectors 31, 33, respectively.

Preferably, the intermediate connection 32 is generally cylindrical and has a through bore 37 therein to define a fluid transfer passage in the fluid transfer device 3 to provide fluid communication between the fluid transfer device 3 and the fixed scroll 15. Accordingly, the first section 311 of the first connector 31 also has a first internal bore 313 intersecting the second internal bore 314 and the second connector 33 has an internal bore 333 intersecting the through bore 36, such that fluid can flow into the second connector 32 via the intermediate connector 32 and finally into the non-orbiting scroll 15 after entering the first connector 31.

Several seals may be provided in the fluid delivery device 3 to provide a gas/liquid tight seal as the fluid flows through the fluid delivery device 3. For example, the seal 38 may be provided at: the first end 321 of the intermediate connector 32 is located between the second bore 314 of the second section 312 of the first connector 31; and/or between the second end 322 of the intermediate connection 32 and the through hole 36 of the second connection 33 at the second section 332; and/or between the second connector body 34 and the blocking member 35.

As can be seen from fig. 3, the fluid transfer device 3 of the present utility model is substantially L-shaped, thus greatly saving the installation space for the fluid transfer device 3 between the outer housing 14 and the fixed scroll 15, compared to the fluid transfer device 1 of the comparative technology in the shape of a Z, thereby making the structure of the scroll compressor more compact.

The angle between the axis 315 of the first bore 313 of the first section 311 of the first connector 31 and the axis of the second bore 314 of the second section 312 is of a degree of 90 degrees or more, preferably of 90 degrees or more, i.e. is an obtuse angle. When the included angle is an obtuse angle, after the intermediate connector 32 is inserted into the second inner hole 314, the axis 371 of the through hole 37 of the intermediate connector 32 is inclined with respect to the mounting surface 40 of the fixed scroll 15 so as not to extend parallel to the mounting surface 40. The second link body 34 has an outer surface 39, the outer surface 39 serving as a second link mounting surface, and the second link mounting surface 39 engages (fits) with the mounting surface 40 of the fixed scroll 15, whereby the axis 371 of the through hole 37 of the intermediate link 32 is also inclined with respect to the second link mounting surface 39.

Further, in a state where the first connecting member 31 is connected to the housing body 14a of the outer housing 14, the axis 315 of the first inner hole 313 is perpendicular to the housing body 14a.

In the assembled state, the first end 321 of the intermediate connector 32 is inserted into the second bore 314 in the second section 312 of the first connector 31, so the second bore 314 coaxially accommodates the first end 321, i.e. the second bore 314 extends coaxially with the through bore 37 of the intermediate connector 32. Similarly, the second end 322 of the intermediate connector 32 is inserted into the second section 332 of the second connector 33, so the second section 332 coaxially accommodates the second end 322, i.e. the through bore 36 of the second connector body 34 extends coaxially with the through bore 37 of the intermediate connector 32.

As shown in fig. 3 and 5, in a state in which the second connector body 34 is mounted to the fixed scroll 15, with the seal 41 interposed between the outer surface (mounting surface) 39 of the second connector body 34 and the outer surface (mounting surface) 40 of the fixed scroll 15, the outer surface 39 of the second connector body 34 abuts against the outer surface 40 of the fixed scroll 15 (i.e., the second connector body 34 is mounted to the mounting surface 40 of the fixed scroll 15).

Preferably, the axis 361 of the through-hole 36 of the second connector body 34 is at an acute angle to the mounting surface 40 and correspondingly also to the second connector mounting surface 39.

Preferably, the axis 371 of the through hole 37 of the intermediate link 32 is arranged coaxially with the axis 361 of the through hole 36 of the second link body 34, such that such an arrangement of the intermediate link 32 and the second link 33 at an acute angle with respect to the mounting surface 40 and the mounting surface 39 (i.e., an arrangement of the second link 33 being inclined inward with respect to the housing body 14a of the outer housing 14) prevents the fluid transfer device 3 from interfering with the outer housing and further saves the mounting space for the fluid transfer device 3 between the outer housing 14 and the fixed scroll 15, thereby making the structure of the scroll compressor more compact. In particular, as shown in fig. 3, the scroll compressor further includes a partition 50 for dividing an inner space of the compressor into a high pressure area and a low pressure area, the partition 50 may be fixed by welding a flange thereof to the housing body 14a and the top cover 14b of the outer housing 14, in which case, since the fluid transfer device 3 is generally L-shaped and the second connection 33 is inclined inward with respect to the housing body 14a of the outer housing 14, it is possible to make room for installation of the partition 50, thereby facilitating installation of the partition 50 while making an overall size of the scroll compressor more compact without changing a size of the scroll compression mechanism. Furthermore, in comparison with the fluid transport device 1 of the related art, due to the above-described inclined arrangement of the fluid transport device 3 in the present utility model, the cylindrical second connector body 34 thereof can also be directly mounted on the fixed scroll 15 without designing the first elbow 11 to have a bent structure of the first section 17 and the second section 18 intersecting the first section 17 as in the fluid transport device 1, thereby reducing the space occupied by the fluid transport device as a whole. In addition, due to the above-described inclined arrangement of the fluid conveying device 3 in the present utility model, the lower portion of the fluid conveying device 3 can be brought closer to the housing body 14a, so that more space can be made for the scroll compression mechanism, and the end plate of the orbiting scroll of the scroll compression mechanism, for example, can be designed larger.

Referring to fig. 6, it is schematically shown that the second connector body 34 is integrally formed with a pair of opposed lugs 341, and threaded connectors are respectively passed through holes in the pair of lugs 341 for securing the second connector body 34 to the fixed scroll 15.

Referring to fig. 7, wherein (a) - (c) of fig. 7 show the occluding member 35 in perspective, side and top views, respectively. The occluding member 35 may have legs 351 extending from the head 352 that are separate from each other, the number of which may be two, three, four, etc. The separate legs allow fluid to pass through the gap between the legs, i.e. a flow channel for fluid is formed between the separate legs, thereby ensuring that a fluid transfer channel is formed from the first connector to the intermediate connector to the second connector. Further, in some embodiments, the leg 351 may serve as a stop member for the intermediate connector 32, in particular, the end of the leg 351, i.e., the end of the leg 351 proximate to the intermediate connector 32, is spaced apart from the end of the second end 322 of the intermediate connector 32. The purpose of such a spacing is to leave a certain degree of freedom for the intermediate connection 32 in its axial direction, thereby ensuring that the intermediate connection 32 has a certain play in its axial direction, and thereby avoiding that the intermediate connection 32 gets stuck or that the intermediate connection 32 interferes with the blocking member 35 due to manufacturing tolerances/assembly tolerances or the like.

Although not shown, a check valve is preferably provided in the through hole 36 of the second connector body 34 to prevent fluid from flowing out of the scroll compression mechanism from the non-orbiting scroll 15 via the fluid delivery device 3, whereby pulsation of a fluid line (such as an enthalpy-increasing jet line connecting an enthalpy-increasing jet fluid source to the fluid delivery device) can be effectively prevented.

The check valve may be partially or fully disposed inside the occluding member 35. In particular, the check valve may be disposed between the plurality of legs so that the up-and-down movement of the check valve may be guided by means of the legs 351. In this way, the up-and-down movement of the check valve can be reliably guided in a simple manner. The check valve may be any suitable type of check valve that prevents fluid flow from the non-orbiting scroll 15 to the fluid transfer device 3, for example, the check valve may be in the form of a flap (a flap check valve is relatively lightweight to facilitate rapid actuation of the check valve in response to a change in pressure differential) or a plunger-like shape with a tapered end near the intermediate connection (a plunger-like check valve with a tapered end may enhance the sealing effect to ensure directional flow performance). In addition, the head of the blocking member may serve as an upper limit structure of the check valve to limit the range of upward movement of the check valve. For the check valve in the form of a sheet, a lower limit structure protruding inward may be provided at the lower end of the leg 351 to limit the range of downward movement of the check valve, and for the check valve in the form of a plunger, the end (upper end) of the second end portion of the intermediate link may be utilized as the lower limit structure to limit the range of downward movement of the check valve. Thereby, the up-and-down limiting structure of the check valve is provided in a simple manner to ensure that the check valve can move within a predetermined range. In particular, the upper limit structure enables the check valve to move upward to allow the through hole 36 to be in fluid communication with the inner bore 333 of the second connection 33, so that fluid smoothly flows into the fixed scroll 15 via the through hole 36 and the inner bore 333.

The fluid transport device 3 of the present utility model is mounted as follows: fixedly connecting the first connecting member 31 to the outer casing 14 (particularly low, casing body 14a of the outer casing 14); the second connector body 34 is mounted to the fixed scroll 15 before the fixed scroll is assembled in the inner space of the compressor; assembling the fixed scroll 15 to which the second link body 34 is fixed in the inner space of the compressor with the inner hole 314 of the second section 312 of the first link 31 aligned with the through hole 36 of the second link body 34, such as fixing the fixed scroll 15 to the main bearing housing; inserting the intermediate connector 32 from the first section 331 side of the second connector 33 through the through hole 36 of the second connector body 34 into the second inner hole 314 in the second section 312 of the first connector 31; and inserting the blocking member 35 into the first section 331 of the second connector 33 to thereby close the through hole 36 of the second connector body 34.

As can be seen from the above-described installation method, by virtue of the structure of the second connecting member of the present utility model having the through-hole through which the intermediate connecting member passes, it is unnecessary to extend an installation tool into the accommodation space between the housing body 14a of the outer housing 14 and the fixed scroll 15 when the fluid transfer device 3 of the present utility model is assembled, so that the installation of the fluid transfer device 3 of the present utility model is not limited by the positional relationship of the installation position (fixing point) of the connecting member (for example, a screw-threaded connecting member) connecting the second connecting member body 34 to the fixed scroll 15 with respect to the open end of the housing body 14a, regardless of whether the installation position is located inside the accommodation space of the housing body 14a or outside the accommodation space of the housing body 14a (i.e., regardless of whether the installation position (fixing point) is lower than or higher than the top end of the housing body 14 a), convenient, reliable connection satisfying the assembly process parameters between the second connecting member body 34 and the fixed scroll 15 can be achieved.

The utility model is susceptible of various modifications. For example, although in the above, it is specifically described that the second connector 33 has the second connector body 34 and the blocking member 35. However, it is conceivable that the second connection 33 has only a single component and no blocking member, in which case the intermediate connection may be provided with a hollow lower section and a solid upper section, which may be sealingly connected with the through-opening 36 of the second connection 33 to act as a blocking, in such a way that it is also possible for the fluid delivery device to perform substantially the same function.

Claims (18)

1. A fluid delivery device of a compressor, the compressor including an outer housing and an inner member received in a receiving space of the outer housing, the fluid delivery device being adapted to deliver fluid from an exterior of the compressor to the inner member, the fluid delivery device comprising:

a first connector for connection with the outer housing;

a second connector for connection with the inner member; and

an intermediate connecting member for connecting the first connecting member and the second connecting member,

wherein the second connector has a through hole through which the intermediate connector is capable of passing such that a first end of the intermediate connector is connectable with the first connector and a second end of the intermediate connector is connectable with the second connector, thereby defining a fluid transfer passage from the first connector to the intermediate connector to the second connector.

2. The fluid delivery device of claim 1, wherein:

the second end of the intermediate connecting piece is accommodated in the through hole, and

the second connector comprises a second connector body and a blocking member, the through hole is formed in the second connector body, and at least a part of the blocking member is mounted in the through hole to close the through hole.

3. The fluid delivery device of claim 2, wherein the second connector body has a first section for receiving the occluding member and a second section for receiving the second end of the intermediate connector.

4. The fluid delivery device of claim 2, wherein a check valve is disposed within the second connector.

5. The fluid delivery device of claim 4, wherein the check valve is partially or fully disposed within the interior of the occluding member.

6. The fluid delivery device of claim 2, wherein the occluding member comprises a head mounted to the through bore and a plurality of separate legs extending from the head and forming flow channels therebetween for the fluid.

7. The fluid delivery device of claim 6, wherein a tip of each of the plurality of legs is spaced apart from a tip of the second end of the intermediate connector.

8. The fluid delivery device of claim 6, wherein a check valve is disposed between the plurality of legs.

9. The fluid delivery device of claim 8, wherein the check valve is in the form of a flap or a plunger tapered near an end of the intermediate connector.

10. The fluid delivery device of claim 8, wherein the check valve is movable between a head of the occluding member and a tip of the second end of the intermediate connector to allow fluid to flow into the inner member via the fluid delivery device but prevent fluid from flowing out of the inner member via the fluid delivery device.

11. The fluid delivery device of any one of claims 1 to 10, wherein the fluid delivery device is substantially L-shaped.

12. The fluid delivery device of any one of claims 1 to 10, wherein:

the first connector has a first section with a first bore and a second section intersecting the first section of the first connector with a second bore intersecting the first bore for receiving the first end of the intermediate connector, and

an included angle between the axis of the first inner bore and the axis of the second inner bore is greater than 90 degrees.

13. The fluid delivery device of any one of claims 1 to 10, wherein the second connector has a second connector mounting face for engagement with the inner member, the axis of the through-hole being at an acute angle to the second connector mounting face.

14. Fluid delivery device according to any of claims 1-10, characterized in that a seal is provided between the first end of the intermediate connection and the first connection and/or between the second end of the intermediate connection and the second connection.

15. Fluid delivery device according to any one of claims 1 to 10, characterized in that the fluid delivery device is an enthalpy-increasing jet device for delivering an enthalpy-increasing jet fluid from an enthalpy-increasing jet fluid source.

16. A compressor comprising a fluid delivery device according to any one of claims 1 to 15.

17. The compressor of claim 16, wherein the compressor is a scroll compressor comprising the outer housing and a non-orbiting scroll serving as the inner member.

18. The compressor as set forth in claim 17, wherein:

the fixed scroll has a fixed scroll mounting surface, the second connecting member is fixed to the fixed scroll in a state where the second connecting member mounting surface of the second connecting member is fitted with the fixed scroll mounting surface,

the outer housing includes a housing body and a top cover connected to a top end of the housing body, and

the fixed point of the second connecting piece and the fixed scroll is lower than the top end of the shell body.