Compressor, freezer and method

Abstract

To provide a compressor, a freezer and a method with reduced manufacturing costs.SOLUTION: A compressor having an oil supply mechanism that supplies lubricant a sliding portion. The oil supply mechanism is formed by fitting an oil supply member and a housing member. The oil supply member is composed of a material having a Young's modulus of 25 GPa or less.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a compressor, a refrigerator, and a method that are easy to manufacture. [Background technology]

[0002] 2. Description of the Related Art Refrigeration machines are widely used in retail stores such as supermarkets and convenience stores to display products that need to be refrigerated or frozen.

[0003] It is preferable that such refrigerators are small in size in order to secure display space, and therefore horizontal scroll compressors are often used to reduce size.

[0004] In scroll compressors, lubricating oil is circulated inside to stabilize the sliding action of the scroll parts. The lubricating oil is stored in a sealed container of the compressor and is sucked up by negative pressure generated when the scroll parts are driven and supplied to the scroll parts.

[0005] Incidentally, the cap connected to the pipe that draws up the lubricating oil for the compressor is generally made of a metal member and is fitted to the inner peripheral surface of the end of the bearing in a fitted structure. For example, JP 2013-87694 A (Patent Document 1) discloses a structure in which the end of the auxiliary bearing opposite the motor part has a fitted structure and a bag-shaped cover is fitted to the inner peripheral surface. According to Patent Document 1, a sealed space is formed by the cover, the auxiliary bearing, and the rotating shaft part, and lubricating oil can be supplied.

[0006] However, in the conventional techniques including Patent Document 1, the cap and the pipe are made of metal members, so welding work is necessary, and the manufacturing costs are high. Also, in order to form a sealed space, a complicated process is required in which a sealing member such as a gasket is crushed and welded between the cap and the end of the auxiliary bearing to fix it, which is a factor that increases costs and labor.

[0007] Therefore, there has been a demand for further technology for reducing costs required for manufacturing the oil supply mechanism in compressors used in refrigerators and the like. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2013-87694 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made in consideration of the problems in the conventional technology described above, and has an object to provide a compressor, a refrigerator, and a method thereof that reduce manufacturing costs. [Means for solving the problem]

[0010] That is, according to the present invention, A compressor having an oil supply mechanism for supplying lubricating oil to a sliding portion, The oil supply mechanism is configured by fitting an oil supply member and a housing member together, The oil supply member is made of a material having a Young's modulus of 25 GPa or less. A compressor is provided. Effect of the Invention

[0011] According to the present invention, a compressor, a refrigerator and a method for producing the same can be provided with reduced manufacturing costs. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view showing the structure of a horizontal scroll compressor according to the prior art. [Diagram 2] FIG. 1 is a cross-sectional view showing a structure of an oil supply mechanism of a horizontal scroll compressor according to a conventional technology. [Diagram 3] FIG. 11 is a cross-sectional view showing the structure of an oil supply member in the prior art. [Figure 4]FIG. 2 is a cross-sectional view showing the structure of an oil supply mechanism of the horizontal scroll compressor according to the embodiment. [Diagram 5] 4A and 4B are diagrams showing the structure of an oil supply member according to the embodiment; [Figure 6] FIG. 3 is a cross-sectional view showing the structure of the oil supply member according to the embodiment. [Figure 7] FIG. 4 is a cross-sectional view showing the structure of a housing member according to the embodiment. [Figure 8] 5A to 5C are diagrams illustrating an example of attaching an oil supply member to a housing member in the embodiment. [Figure 9] FIG. 11 is a cross-sectional view showing the structure of a housing member and an oil supply member according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention will be described below with reference to an embodiment, but the present invention is not limited to the embodiment described below. In addition, in each drawing referred to below, the same reference numerals are used for common elements, and the description thereof will be omitted as appropriate.

[0014] In addition, in the following, as a basic premise for explaining the embodiments of the present invention, an oil supply mechanism 100' for a compressor in the prior art will be explained with reference to Figs. 1 to 3.

[0015] 1 is a cross-sectional view showing the structure of a conventional horizontal scroll compressor 1. The horizontal scroll compressor 1 is roughly divided into an oil storage chamber 10, a motor chamber 20, and a pump chamber 30.

[0016] Lubricating oil is stored in the oil storage chamber 10 and is supplied to the sliding parts of the pump chamber 30 by an oil supply member 150. A discharge pipe 11 is provided in the oil storage chamber 10 to discharge air to the outside of the compressor. A motor 21 is housed in the motor chamber 20.

[0017] The pump chamber 30 contains a rotating scroll 32 and a fixed scroll 33 housed inside a high-pressure chamber 31. When the rotating scroll 32 is driven, air is sucked in through a suction pipe 34. The air is then discharged from the discharge pipe 11 as compressed air.

[0018] 1 indicates a portion related to a mechanism for supplying lubricating oil. An oil supply mechanism 100' will now be described with reference to FIG.

[0019] Fig. 2 is a cross-sectional view showing the structure of an oil supply mechanism 100' of a horizontal scroll compressor according to the prior art. It should be noted that the cross-sectional view shown in Fig. 2 shows an enlarged view of a portion related to the oil supply mechanism 100' (the area shown by the dashed line in Fig. 1), and other parts and the like are omitted as appropriate.

[0020] 2, oil supply mechanism 100' in the prior art is configured by fitting oil supply member 150 into housing member 110. A seal member 160 such as a gasket is inserted between oil supply member 150 and housing member 110 to maintain a tight seal.

[0021] Therefore, when the scroll mechanism of the compressor is driven and negative pressure is generated, the lubricating oil stored in the compressor is sucked up by the oil supply member 150 and supplied to the sliding parts. The arrows in Fig. 2 indicate the flow of the lubricating oil.

[0022] Next, the structure of oil supply member 150 shown in Fig. 2 will be described. Fig. 3 is a cross-sectional view showing the structure of a conventional oil supply member 150. As shown in Fig. 3, conventional oil supply member 150 is configured by connecting cap member 151 and pipe member 152.

[0023] Conventionally, oil supply member 150 as shown in Fig. 3 has been made of metal. Therefore, in order to manufacture oil supply member 150, it was necessary to weld metal cap member 151 and metal pipe member 152 together. This was a factor that increased the cost of manufacturing a compressor having an oil supply mechanism.

[0024] Similarly, the seal member 160 is also made of a gasket or the like, which increases the labor and cost required for manufacturing.

[0025] Furthermore, when attaching the oil supply member 150 to the housing member 110, it is necessary to weld and join the oil supply member 150 to the housing member 110 while pressing the oil supply member 150 against the housing member 110 with a special tool, which is also time-consuming.

[0026] Therefore, in this embodiment, the oil supply member is made of a material having a relatively high elasticity, thereby reducing the effort and cost required for manufacturing the compressor. The oil supply mechanism 100 in this embodiment will be described in detail below.

[0027] Fig. 4 is a cross-sectional view showing the structure of the oil supply mechanism 100 of the horizontal scroll compressor in this embodiment. It should be noted that the cross-sectional view shown in Fig. 4 shows an enlarged view of the portion related to the oil supply mechanism 100 of the compressor, similar to Fig. 2, and other parts are omitted as appropriate.

[0028] In the embodiment described below, a horizontal scroll compressor is taken as an example of a compressor, but the embodiment is not limited thereto. Therefore, the embodiment can be generally applied to any horizontal compressor having an oil supply mechanism.

[0029] As shown in Fig. 4, the oil supply mechanism 100 of this embodiment includes a housing member 110 and an oil supply member 120. Here, the oil supply member 120 is made of a material having a relatively high elasticity. The oil supply mechanism 100 of this embodiment may also include an O-ring 130 for improving the adhesion between the housing member 110 and the oil supply member 120 to form an enclosed space. As an example, the O-ring 130 may be made of rubber, but this is not a limitation of the embodiment.

[0030] The oil supply member 120 of this embodiment can be fitted into the inner wall of the housing member 110 and can be coupled to the housing member 110. Furthermore, since the oil supply member 120 of this embodiment is made of an elastic material, it can be fixed to the housing member 110 as a so-called snap-fit ​​structure.

[0031] As shown in Fig. 4, in the oil supply mechanism 100, a housing member 110 and an oil supply member 120 are fitted together to form a tight seal, and an O-ring 130 maintains a seal. With this, when negative pressure is generated when the scroll mechanism of the compressor is driven, the lubricating oil stored in the compressor is sucked up by the oil supply member 120, and the lubricating oil is supplied to the sliding parts. The arrows in Fig. 4 indicate the flow of the lubricating oil.

[0032] Each member constituting the oil supply mechanism 100 of this embodiment will be described below. The oil supply member 120 will be described with reference to Fig. 5 and Fig. 6, and the housing member 110 will be described with reference to Fig. 7.

[0033] First, the oil supplying member will be described with reference to Fig. 5 and Fig. 6. Fig. 5 is a diagram showing the structure of the oil supplying member 120 of this embodiment, and Fig. 6 is a cross-sectional view showing the structure of the oil supplying member 120 of this embodiment. Fig. 5(a) shows a rear view of the oil supplying member 120, and Fig. 5(b) shows a side view of the oil supplying member 120.

[0034] 5(a) and (b), oil supply member 120 of this embodiment is composed of cap portion 121 corresponding to cap member 151 in the prior art, and pipe portion 122 corresponding to pipe member 152 in the prior art. That is, cap portion 121 of oil supply member 120 fits into housing member 110, and an end of pipe portion 122 reaches a reservoir for lubricating oil.

[0035] As shown in Fig. 5, cap portion 121 may include protruding claws 123a to 123c for fixing oil supply member 120 to housing member 110. In the embodiment described below, oil supply member 120 includes three claws 123 as shown in Fig. 5, but this is not intended to limit the embodiment. Therefore, the number of claws 123 may be any number.

[0036] Furthermore, the positions of the claws 123 are not limited to the arrangement shown in Fig. 5 and the like, and may be any positions. For example, as shown in Fig. 5, when three claws 123a to 123c are provided, they may be arranged at pitches of approximately 100° to 150°. However, this is not a particular limitation on the embodiment, and when multiple claws 123 are provided, they may be arranged at approximately equal intervals.

[0037] In addition, in the conventional oil supply member 150, as shown in Figs. 2 and 3, the length direction of the cap member 151 and the direction in which the lubricating oil is drawn out at the end of the pipe member 152 are perpendicular to each other. On the other hand, in the oil supply member 120 in this embodiment, as shown in Fig. 6, the length direction of the pipe portion 122 (line B shown by a thousand in Fig. 6) is configured to be inclined to the length direction of the cap portion 121 (line A shown by a dashed line in Fig. 6). As shown in Fig. 6, by making the pipe portion 122 inclined, the end portion that sucks in the lubricating oil can be moved away from the sliding portion of the compressor without increasing the dimensions of the oil supply member 120. This can reduce the suction of air bubbles generated from the lubricating oil stirred by the sliding portion, and the lubricating oil can be stably supplied. In addition, by making the pipe portion 122 inclined, the overall height of the oil supply member 120 (the dimension in the same direction as the line A in Fig. 6) can be reduced.

[0038] The oil supply member 120 of this embodiment can be made of a material having a relatively high elasticity, for example, a material having a Young's modulus of 25 GPa or less. Furthermore, the oil supply member 120 of this embodiment is preferably made of a material having resistance to oil and refrigerant. For example, a resin can be used as the material of the oil supply member 120. More specific examples of the oil supply member 120 include PBT (Poly Butylene Terephtalate) and LCP (Liquid Crystal Polymer), but this is not intended to limit the embodiment.

[0039] Next, the housing member 110 will be described. Fig. 7 is a cross-sectional view showing the structure of the housing member 110 of this embodiment. Fig. 7(a) shows a side cross-sectional view of the housing member 110, and Fig. 7(b) shows a top view of the housing member 110.

[0040] As shown in FIG. 7, the housing member 110 of this embodiment has a substantially cylindrical shape and a hollow portion. An oil supply member 120 is inserted into the hollow portion of the housing member 110, and lubricating oil passes through the oil supply member 120 to supply the lubricating oil to the sliding portion of the compressor. Also, as shown in FIG. 7(a), a recess 111 is provided in the hollow portion of the housing member 110 into which a claw 123 of the oil supply member 120 fits. By fitting the claw 123 into the recess 111, the oil supply member 120 is engaged with the housing member 110, and both members can be fixed. Also, by fitting an O-ring 130 into the recess 111, the adhesion between the oil supply member 120 and the housing member 110 can be improved, and lubricating oil can be stably supplied.

[0041] Next, assembly of the oil supply mechanism 100 of this embodiment will be described with reference to Fig. 8. Fig. 8 is a diagram showing an example of attaching the oil supply member 120 to the housing member 110 in this embodiment, showing cross-sectional views of each member.

[0042] As shown in Fig. 8, first, O-ring 130 is placed in recess 111 of housing member 110. Then, cap portion 121 of oil supply member 120 is inserted into the hollow portion of housing member 110 as shown by the arrow in Fig. 8. At this time, the elasticity of oil supply member 120 narrows the opening of cap portion 121, allowing it to be fitted into housing member 110. Furthermore, claw 123 fits into recess 111, preventing oil supply member 120 from coming off housing member 110, and allowing the two components to be connected.

[0043] Incidentally, when fitting the oil supply member 120 into the housing member 110, the oil supply member 120 may be inserted by shrink fitting or cold fitting. That is, in the case of shrink fitting, the housing member 110 may be heated to expand, and the oil supply member 120 may be inserted. In addition, in the case of cold fitting, the oil supply member 120 may be cooled to contract, and then inserted into the housing member 110. By performing shrink fitting or cold fitting in this way, rattling between the oil supply member 120 and the housing member 110 can be suppressed, and the connection between the two members can be stabilized.

[0044] Furthermore, the oil supplying mechanism 100 of this embodiment may include a mechanism for preventing rotation of the oil supplying member 120. For example, a protrusion may be provided on the oil supplying member 120, and a groove corresponding to the protrusion may be provided on the housing member 110. In this way, when the oil supplying member 120 is fitted into the housing member 110, the protrusion fits into the groove, preventing the oil supplying member 120 from rotating.

[0045] So far, the configuration of the oil supply mechanism 100 in this embodiment has been described. In the above embodiment, the configuration in which the claws 123 are provided on the oil supply member 120 made of a material having a relatively high elasticity, and the recesses 111 are provided on the housing member 110 has been described. However, the embodiment is not limited to the above configuration, and the claws and the recesses may be provided on the members reversed from those in FIGS. 4 to 8.

[0046] That is, in another preferred embodiment, the configuration may be as shown in Fig. 9. Fig. 9 is a cross-sectional view showing the structure of a housing member 110 and an oil supply member 120 in another embodiment.

[0047] As shown in Fig. 9, in another embodiment, oil supply mechanism 100 may be configured such that oil supply member 120 is provided with a recess, and housing member 110 is provided with a claw. Even with oil supply mechanism 100 configured as shown in Fig. 9, the labor required for assembly can be reduced, and manufacturing costs can be suppressed, as in the embodiment described with reference to Figs. 4 to 8.

[0048] According to the embodiments of the present invention described above, it is possible to provide a compressor, a refrigerator, and a method for reducing manufacturing costs.

[0049] Although the present invention has been described above with reference to an embodiment, the present invention is not limited to the above-described embodiment, and as long as the functions and effects of the present invention are achieved within the scope of embodiments that a person skilled in the art can imagine, they are included in the scope of the present invention. [Explanation of symbols]

[0050] 1...Horizontal scroll compressor, 10...Oil storage room, 11...Discharge pipe, 20…Motor room, 21...Motor, 30…Pump room, 31...High pressure chamber, 32...Rotating scroll, 33…Fixed scroll, 34…suction pipe, 100, 100'...Oil supply mechanism, 110...Housing member, 111...recess, 120...Oil supply member, 121…Cap part, 122…Pipe section, 123...Claws, 130…O-ring, 150...Oil supply member, 151...cap member, 152...Pipe members, 160...Sealing material

Claims

1. A compressor having an oil supply mechanism for supplying lubricating oil to a sliding portion, The oil supply mechanism is configured by fitting an oil supply member and a housing member together, The oil supply member is made of a material having a Young's modulus of 25 GPa or less. Compressor.

2. The oil supply member is made of resin. The compressor according to claim 1 .

3. The oil supply member and the housing member are fitted together by a snap-fit ​​structure. The compressor according to claim 2.

4. A claw is disposed on the cap portion of the oil supply member, The oil supply member is engaged with the housing member by the claw. The compressor according to claim 3.

5. The claws are provided in a plurality, Each claw is arranged at approximately equal intervals. The compressor according to claim 4.

6. The oil supply mechanism further includes an O-ring. The compressor according to claim 1.

7. The oil supply mechanism has a pipe portion disposed obliquely with respect to a longitudinal direction of a cap portion of the oil supply mechanism. The compressor according to claim 1.

8. A refrigerator comprising the compressor according to any one of claims 1 to 6.

9. A method for manufacturing a compressor having an oil supply mechanism including an oil supply member and a housing member, comprising the steps of: The method includes a step of fitting the oil supply member made of a material having a Young's modulus of 25 GPa or less and the housing member by shrink fitting. method.

10. A method for manufacturing a compressor having an oil supply mechanism including an oil supply member and a housing member, comprising the steps of: The method includes a step of fitting the oil supply member made of a material having a Young's modulus of 25 GPa or less and the housing member by cold fitting. method.

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