US3926009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetic compressor with insulated discharge tube
Assignee: Lennox Industries Inc
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Filing: 1975-01-27
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Granted: 1975-12-16
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Expires: 1995-01-27
Abstract
Abstract A refrigerant compressor incorporating insulated discharge tube means for preventing undesirable heat transfer between the relatively hot refrigerant in the discharge tube and the relatively cool refrigerant in the compressor between the compression mechanism and the outer housing thereof. The insulated discharge tube means will also prevent undesirable heat transfer between the relatively hot refrigerant in the discharge tube and the lubricant in the lubricant sump within the outer housing. In a modification, the insulated discharge tube means may be comprised of tubes disposed one within the other, with one or both of the tubes being corrugated so as to enhance flexibility of the insulated discharge tube means and thereby reduce or obviate transmission of vibration from the compression mechanism to the outer housing of the compressor.
Inventors
- 👤 Sidney A Parker
- 👤 Seymour Rothstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:36
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/0044; F04B39/06; F04B39/12; F25; F25B; F25B31/00; F25B31/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
93 words
In a refrigerant compressor having compression mechanism for compressing a refrigerant and a discharge tube communicating with the compression mechanism for forwarding the relatively hot refrigerant to a refrigeration system, said compression mechanism being within an outer housing, a lubricant sump within the outer housing, said discharge tube being in heat exchange relationship with the lubricant in the lubricant sump, the improvement wherein an imperforate tubular member is disposed about the discharge tube in heat transfer relation with the lubricant sump in such manner as to insulate the discharge tube from the lubricant.
Claim 2
Dependent Claim
93 words
In a refrigerant compressor having compression mechanism for compressing a refrigerant and a discharge tube communicating with the compression mechanism for forwarding the relatively hot refrigerant to a refrigeration system, said compression mechanism being within an outer housing, a lubricant sump within the outer housing, said discharge tube being in heat exchange relationship with the lubricant in the lubricant sump, the improvement wherein an imperforate tubular member is disposed about the discharge tube in heat transfer relation with the lubricant sump in such manner as to insulate the discharge tube from the lubricant.
Claim 3
Dependent Claim
25 words
A refrigerant compressor as in claim 1 wherein the tubular member defines a vacuum chamber about the discharge tube between said member and said tube.
Claim 4
Dependent Claim
43 words
A refrigerant compressor as in claim 2 wherein relatively cool vaporous refrigerant is in the outer housing and the tubular member and vacuum chamber insulate the relatively hot refrigerant in the discharge tube from the relatively cool vaporous refrigerant in the outer housing.
Claim 5
Dependent Claim
114 words
In a refrigerant compressor having compression mechanism for compressing a refrigerant, a discharge tube communicating with the compression mechanism for forwarding hot vaporous refrigerant to a refrigeration system, said compression mechanism being within an outer housing, a suction line for returning relatively cool refrigerant to the refrigerant compressor from the refrigeration system, said discharge tube being in heat exchange relationship with the relatively cool refrigerant returned to the outer housing from the suction line, the improvement wherein an imperforate tubular member is disposed about the discharge tube in heat exchange relation with the relatively cool refrigerant in the outer housing in such manner as to insulate the hot and cool refrigerant from one another.
Claim 6
Dependent Claim
114 words
In a refrigerant compressor having compression mechanism for compressing a refrigerant, a discharge tube communicating with the compression mechanism for forwarding hot vaporous refrigerant to a refrigeration system, said compression mechanism being within an outer housing, a suction line for returning relatively cool refrigerant to the refrigerant compressor from the refrigeration system, said discharge tube being in heat exchange relationship with the relatively cool refrigerant returned to the outer housing from the suction line, the improvement wherein an imperforate tubular member is disposed about the discharge tube in heat exchange relation with the relatively cool refrigerant in the outer housing in such manner as to insulate the hot and cool refrigerant from one another.
Claim 7
Dependent Claim
19 words
A refrigerant compressor as in claim 4 wherein the tubular member defines a vacuum chamber about the discharge tube.
Claim 8
Dependent Claim
38 words
A refrigerant compressor as in claim 4 including a lubricant sump in the outer housing, said tubular member and vacuum chamber insulating the lubricant in the lubricant sump from the relatively hot vaporous refrigerant in the discharge tube.
Claim 9
Dependent Claim
21 words
A refrigerant compressor as in claim 6 wherein the vacuum in the vacuum chamber is on the order of 500 microns.
Claim 10
Dependent Claim
54 words
A refriGerant compressor as in claim 4 wherein the compression mechanism is driven by an electric-drive motor that is cooled by the relatively cool refrigerant within the outer housing of the refrigerant compressor, said relatively cool refrigerant being returned from the suction line to the space between the outer housing and the compression mechanism.
Claim 11
Dependent Claim
34 words
A refrigerant compressor as in claim 1 wherein the discharge tube is corrugated at least in part so as to provide flexibility of same and thereby reduce transmission of vibration from the compression mechanism.
Claim 12
Dependent Claim
35 words
A refrigerant compressor as in claim 1 wherein the tubular member is corrugated at least in part so as to provide for flexibility of same and thereby reduce transmission of vibration from the compression mechanism.
Claim 13
Dependent Claim
38 words
A refrigerant compressor as in claim 1 wherein the discharge tube and the tubular member have corrugated portions so as to provide for flexibility and thereby reduce transmission of vibration from the compression mechanism to the outer housing.
Claim 14
Dependent Claim
115 words
In a refrigerant compressor having compression mechanism within an outer housing, discharge tube means communicating with the compression mechanism and extending from the outer housing for communicating relatively hot refrigerant to a refrigerant system, a suction line for returning relatively cool refrigerant to the compressor from the refrigerant system, said discharge tube means being in heat exchange relationship with the cool refrigerant returned to the compressor from the suction line, the improvement wherein said discharge tube means comprises an inner discharge tube and an outer imperforate tubular member defining a chamber about the discharge tube, said discharge tube means having bellows portions to minimize transmission of vibration from the compression mechanism to the outer housing.
Claim 15
Dependent Claim
115 words
In a refrigerant compressor having compression mechanism within an outer housing, discharge tube means communicating with the compression mechanism and extending from the outer housing for communicating relatively hot refrigerant to a refrigerant system, a suction line for returning relatively cool refrigerant to the compressor from the refrigerant system, said discharge tube means being in heat exchange relationship with the cool refrigerant returned to the compressor from the suction line, the improvement wherein said discharge tube means comprises an inner discharge tube and an outer imperforate tubular member defining a chamber about the discharge tube, said discharge tube means having bellows portions to minimize transmission of vibration from the compression mechanism to the outer housing.
Claim 16
Dependent Claim
19 words
A refrigerant compressor as in claim 12 wherein the discharge tube is provided with at least one bellows portion.
Claim 17
Dependent Claim
19 words
A refrigerant compressor as in claim 12 wherein the tubular member is provided with at least one bellows portion.
Claim 18
Dependent Claim
23 words
A refrigerant compressor as in claim 12 wherein both the discharge tube and the tubular member are provided with corrugations forming bellows portions.
Claim 19
Dependent Claim
23 words
A refrigerant compressor as in claim 15 wherein reinforcement means is provided to strengthen the bellows portions in use and prevent rupture thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |