JPH0353023Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cooling device for a hermetic electric compressor or the like used in an air conditioner or the like.

(Prior Art) An example of a conventional compressor cooling device is shown in FIGS. 7 to 9. A pipe 02 with a circular cross section is spirally wound around the outer peripheral wall of the barrel-shaped closed housing 01 of the compressor, and this pipe 02 is connected to the housing 0.
It is joined to the outer peripheral wall of No. 1 by brazing 05.
Cooling water flows into the pipe 02 from a cooling water inlet 03 and is discharged from a cooling water outlet 04. housing 0
Lubricating oil flows through the bearings and other sliding parts of the compression mechanism built into the compressor 1 and the electric motor that drives it, and lubricates the sliding parts of the electric motor and absorbs heat from these sliding parts. The heat of the sliding parts of the electric motor etc. and the lubricating oil is transmitted to the housing 01, and from the outer peripheral wall of the housing 01 to the pipe 02.
It is absorbed by the cooling water of 2.

(Problems to be Solved by the Invention) In the conventional compressor cooling device described above, the pipe 02 is spirally wound around the outer circumferential wall of the compressor housing 01, and the two are joined by brazing 05.
The processing requires labor and time. In addition, the pipe 02 is in line contact with the outer peripheral wall of the housing 01, and although they are brazed, the heat transfer area between them is small, so the heat generated by the compressor is transferred to the pipe 02.
The compressor was not sufficiently cooled because it was difficult for the cooling water to flow through the compressor. Furthermore, since the entire compressor is heated when the pipe 02 is brazed to the outer circumferential wall of the housing 01, there is a problem in that the electric motor and the like inside the housing 01 are affected by heat. Furthermore, the lubricating oil flowing inside the compressor is sealed inside the housing 01, and the heat of the lubricating oil is transferred to the cooling water via the housing 01 and the pipe 02.
Cooling efficiency was not good.

(Means for Solving the Problems) The present invention has been proposed in order to deal with the above problems, and its gist is to attach a helical sleeve with an outer sleeve joined to the outer periphery of the compressor housing. Fitted into the outer peripheral wall directly or via an inner sleeve, fluid passages are formed between the helical sleeve and the outer sleeve, and between the helical sleeve and the outer wall or inner sleeve of the housing, and the fluid is A cooling device for a compressor is characterized in that the cooling medium is configured to flow through one of the passages, and the lubricating oil for the compressor flows through the other passage.

(Function) Since the present invention has the above configuration,
By joining the outer sleeve to the outer periphery of the helical sleeve and fitting and joining it to the outer peripheral wall of the housing directly or through the inner sleeve, the space between the helical sleeve and the outer sleeve and between the helical sleeve and the outer peripheral wall of the housing or A spiral fluid passage can be easily and quickly formed between the inner sleeve and the inner sleeve.

Further, the entire surface of the outer circumferential wall of the housing is cooled by being in contact with the fluid flowing through the fluid passage either directly or via the inner sleeve. Furthermore, the lubricating oil of the compressor is cooled by coming into contact with the cooling medium over a wide range through the spiral sleeve, and then enters the housing to cool the sliding parts of the compression mechanism, electric motor, etc.

(Embodiment) A first embodiment of the present invention is shown in FIGS. 1 to 3. In Figures 1 to 3, 1
is the compressor housing, 2 is the helical sleeve, and 3 is the outer sleeve. The top surface of each wave on the outer circumferential side of the spiral sleeve 2, which has a corrugated cross section and a cylindrical shape as a whole, is welded 4 to the inner surface of the cylindrical outer sleeve 3. A fluid passage 9 is formed through which lubricating oil flows. After that, the spiral sleeve 2 is fitted onto the outer peripheral wall of the housing 1, and the top surface of each wave on the inner peripheral side of the spiral sleeve 2 is directly welded to the outer peripheral wall of the housing 1. A fluid passage 10 is formed between the spiral sleeve 2 and the spiral sleeve 2 through which a cooling medium such as cooling water flows. The lubricating oil taken out from inside the housing 1 flows through the inlet pipe 6 connected to the upper end of the fluid passage 9, flows through the fluid passage 9, and is discharged from the outlet pipe 7 connected to the lower end of the fluid passage 9. 1
Go back inside. Cooling medium such as cooling water is in fluid passage 1
0 flows through the inlet pipe 11 connected to the upper end of the fluid passage 10, flows through the fluid passage 10, and is discharged through the outlet pipe 12 connected to the lower end. Heat generated from the compressor is absorbed by a cooling medium such as cooling water flowing through the fluid passage 9 directly from the outer circumferential wall of the housing 1 or from the outer circumferential wall of the housing 1 through the helical sleeve 2 . The heat of the lubricating oil flowing through the fluid passage 9 is transferred to the fluid passage 10 via the spiral sleeve 2.
absorbed by the cooling medium flowing through it.

Thus, almost the entire surface of the outer circumferential wall of the housing 1 serves as a heat transfer surface to the cooling medium, so that it is effectively cooled by the cooling medium. Further, in the process of flowing through the fluid passage 9, the lubricating oil comes into contact with the cooling medium flowing through the fluid passage 10 via the helical sleeve 2 over its entire length, and is therefore effectively cooled by the cooling medium. Further, since the outer circumferential wall of the housing 1 is only locally heated when the corrugated top surface of the helical sleeve 2 is welded 5, there is almost no thermal effect on the electric motor or the like inside the compressor.

A second embodiment of the invention is shown in FIGS. 4-6. This is similar to the first embodiment, in which an outer sleeve 3 is welded 4 to the outer periphery of the spiral sleeve 2, and a cylindrical inner sleeve 1 is attached to the crest of the wave on the inner circumferential side of the helical sleeve 2.
A fluid passage 10 is formed between the inner sleeve 13 and the helical sleeve 2 by welding 5 to the outer surface of the helical sleeve 3 to allow a spiral cooling medium to flow therethrough. Thereafter, the inner sleeve 13 is fitted onto the outer circumferential wall of the housing 1, and both are bonded to each other by an adhesive 14 having good thermal conductivity. The rest of the structure is similar to that of the first embodiment shown in FIGS. 1 to 3, and corresponding members are given the same reference numerals. Heat generated from the compressor is transferred to a cooling medium such as cooling water that communicates with the inside of the fluid passage 10 from the outer peripheral wall of the housing 1 through the adhesive 14 and the inner sleeve 13, or from the inner sleeve 13 through the spiral sleeve 2. be absorbed into. In this embodiment, the inner sleeve 13 is welded to the inner circumference of the spiral sleeve 2, and then this inner sleeve is inserted into the outer circumferential wall of the housing 1, and the two are joined with the adhesive 14, so that the inside of the housing 1 is There is no thermal effect on electric motors, etc.

(Effect of the invention) In the present invention, a helical sleeve having an outer sleeve joined to its outer periphery is fitted and joined to the outer peripheral wall of a compressor housing directly or through an inner sleeve, and the spiral sleeve and the outer sleeve are connected to each other. A fluid passage is formed between the helical sleeve and the outer wall or the inner sleeve of the housing, and the cooling medium is configured to flow through one of the fluid passages, and the lubricating oil for the compressor flows through the other fluid passage. So,
By fitting and joining the helical sleeve with the outer sleeve joined to the outer periphery to the outer peripheral wall of the housing directly or through the inner sleeve, the spiral sleeve can be connected to the outer wall of the housing, and between the helical sleeve and the outer wall of the housing or the inner sleeve. A spiral fluid passage can be easily and quickly formed between the two. Further, the entire outer circumferential wall of the housing comes into contact with the fluid either directly or via the inner sleeve, and therefore the heat transfer area of the housing becomes wider, thereby improving the cooling effect of the compressor. Further, while the lubricating oil of the compressor flows through the fluid passage, it comes in contact with the cooling medium through the spiral sleeve over almost its entire length, and is cooled over a wide area. Since the lubricating oil thus cooled enters the housing and cools the sliding parts of the compression mechanism, electric motor, etc., the cooling effect of the compressor is further improved.

[Brief explanation of drawings]

Figures 1 to 3 show a first embodiment of the present invention, where Figure 1 is a front view, Figure 2 is a top view, and Figure 3 is an enlarged sectional view taken along the - line in Figure 2. . Figures 4 to 6 show a second embodiment of the present invention, with Figure 4 being a front view, Figure 5 being a top view, and Figure 6 being an enlarged sectional view taken along the - line in Figure 5. . 7th
9 to 9 show an example of a conventional compressor cooling device, FIG. 7 is a front view, FIG. 8 is a top view, and FIG. 9 is an enlarged sectional view taken along the line - in FIG. 8. Compressor housing…1, spiral sleeve…2,
Outer sleeve...3, inner sleeve...13.

Claims (1)

[Scope of utility model registration request] A helical sleeve having an outer sleeve joined to the outer periphery is fitted onto the outer peripheral wall of the compressor housing directly or via an inner sleeve, and the spiral sleeve is connected to the outer wall of the housing. Alternatively, a cooling device for a compressor, characterized in that a fluid passage is formed between the inner sleeve and the inner sleeve, and a cooling medium is passed through one of the fluid passages, and lubricating oil for the compressor is passed through the other of the fluid passages.