Patent US3681936A successfully refreshed from Google Patents.
US3681936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: OKLAHOMA Mfg CO
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Filing: 1970-10-26
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Granted: 1972-08-08
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Expires: 1990-10-26
Abstract
Abstract A heat exchanger adapted for use in a combination heating and refrigeration system for transferring heat to or from a secondary refrigerant, which includes a plurality of heat exchange tubes closed at one end and opened at the other end with helical corrugations formed in the walls thereof, and a restrictor tube extending into each heat exchange tube and communicating with the closed end of the respective heat exchange tube to receive the primary refrigerant first directed into the respective heat exchange tube, wherein the closed ends of the heat exchange tubes are lower than the open ends thereof and liquid primary refrigerant accumulates in the closed ends of the heat exchange tubes when the exchanger is used in a heating system, such that the rate of flow of primary refrigerant through the heat exchanger is automatically controlled for both refrigeration and heating system operations, and the same amount of primary refrigerant may be used when the system is used for either heating or refrigeration.
Inventors
- 👤 Robert G Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:44
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/40; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F25; F25B; F25B39/00; F25B39/02; F25B41/00; F25B41/30; F25B41/37; F28D; F28D7/00; F28D7/10; F28D7/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
385 words
A heat exchanger comprising: an elongated, hollow body having first and second closed ends and having inlet and outlet openings therein; a perforated first plate member disposed in said body adjacent the first closed end thereof having a periphery connected in fluid-tight relationship with said body to form a first chamber in said body; a perforated second plate member disposed in said body between said first plate member and said second closed end and having a periphery connected in fluid-tight relationship with said body to form a second chamber with said first plate member and a third chamber with the second closed end of said body, said third chamber being in communication with said inlet and outlet openings; a first conduit having an open end connected in one of the perforations in said first plate member with said open end in communication with said first chamber and extending through the second closed end of said body to transfer fluid to and from said first chamber; a second conduit encircling a portion of said first conduit and having an open end in communication with said second chamber and connected in one of the perforations in said second plate member, said second conduit also extending through the second closed end of said body to transfer fluid to and from said second chamber; a plurality of tubes disposed in said body, each of said tubes having an open end connected in a respective perforation in said second plate member, having a closed end thereon disposed in said third chamber adjacent the second closed end of said body, and having a continuous helical corrugation formed in the tube wall that extends for substantially the full length thereof and projects radially inwardly therefrom; a plurality of open-ended restrictor tubes disposed in said body, each of said restrictor tubes having one open end connected in a respective perforation in said first plate member in communication with said first chamber and having the other open end located in and adjacent the closed end of a respective one of said tubes and in intimate relation to the helical corrugation formed therein; and a plurality of baffle members located in the third chamber of said body between the inlet and outlet openings whereby fluid flowing therebetween follows a circuitous path through said third chamber.
Claim 2
Dependent Claim
385 words
A heat exchanger comprising: an elongated, hollow body having first and second closed ends and having inlet and outlet openings therein; a perforated first plate member disposed in said body adjacent the first closed end thereof having a periphery connected in fluid-tight relationship with said body to form a first chamber in said body; a perforated second plate member disposed in said body between said first plate member and said second closed end and having a periphery connected in fluid-tight relationship with said body to form a second chamber with said first plate member and a third chamber with the second closed end of said body, said third chamber being in communication with said inlet and outlet openings; a first conduit having an open end connected in one of the perforations in said first plate member with said open end in communication with said first chamber and extending through the second closed end of said body to transfer fluid to and from said first chamber; a second conduit encircling a portion of said first conduit and having an open end in communication with said second chamber and connected in one of the perforations in said second plate member, said second conduit also extending through the second closed end of said body to transfer fluid to and from said second chamber; a plurality of tubes disposed in said body, each of said tubes having an open end connected in a respective perforation in said second plate member, having a closed end thereon disposed in said third chamber adjacent the second closed end of said body, and having a continuous helical corrugation formed in the tube wall that extends for substantially the full length thereof and projects radially inwardly therefrom; a plurality of open-ended restrictor tubes disposed in said body, each of said restrictor tubes having one open end connected in a respective perforation in said first plate member in communication with said first chamber and having the other open end located in and adjacent the closed end of a respective one of said tubes and in intimate relation to the helical corrugation formed therein; and a plurality of baffle members located in the third chamber of said body between the inlet and outlet openings whereby fluid flowing therebetween follows a circuitous path through said third chamber.
Claim 3
Dependent Claim
315 words
A heat exchanger for use in a combination heating and cooling system which includes a compressor circulating a primary refrigerant, and an air conditioning coil through which is circulated a secondary refrigerant comprising: a hollow, elongated body supported with one end slightly lower than the other end thereof having a first chamber in the higher end thereof, a third chamber in the lower end thereof, and a second chamber between the first and third chambers, said body further having inlet and outlet connections communicating with the third chamber and adapted for connection with the air conditioning coil; a first conduit having one end in communication with said second chamber and having the other end adapted to be connected to the refrigerant compressor; a second conduit having one end in communication with said first chamber and having the other end adapted to be connected with the refrigerant compressor; a plurality of first tubes supported in said body, each of said tubes having an open end in communication with said second chamber, having a lower closed end located in said third chamber, and having a continuous helical corrugation formed in the tube wall that extends for substantially the full length thereof and projects radially inwardly therefrom; a plurality of open-ended restrictor tubes supported in said body, each of said restrictor tubes having one open end in communication with said first chamber and having the other open end disposed in a respective one of said first tubes adjacent the closed end thereof and each of said restrictor tubes being in intimate relation to the helical corrugation formed in a respective one of said first tubes, whereby primary refrigerant from the compressor either cools or heats the secondary refrigerant flowing through said third chamber to the air conditioning coil depending on whether the primary refrigerant is flowing from said compressor into said first conduit or into said second conduit.
Claim 4
Dependent Claim
315 words
A heat exchanger for use in a combination heating and cooling system which includes a compressor circulating a primary refrigerant, and an air conditioning coil through which is circulated a secondary refrigerant comprising: a hollow, elongated body supported with one end slightly lower than the other end thereof having a first chamber in the higher end thereof, a third chamber in the lower end thereof, and a second chamber between the first and third chambers, said body further having inlet and outlet connections communicating with the third chamber and adapted for connection with the air conditioning coil; a first conduit having one end in communication with said second chamber and having the other end adapted to be connected to the refrigerant compressor; a second conduit having one end in communication with said first chamber and having the other end adapted to be connected with the refrigerant compressor; a plurality of first tubes supported in said body, each of said tubes having an open end in communication with said second chamber, having a lower closed end located in said third chamber, and having a continuous helical corrugation formed in the tube wall that extends for substantially the full length thereof and projects radially inwardly therefrom; a plurality of open-ended restrictor tubes supported in said body, each of said restrictor tubes having one open end in communication with said first chamber and having the other open end disposed in a respective one of said first tubes adjacent the closed end thereof and each of said restrictor tubes being in intimate relation to the helical corrugation formed in a respective one of said first tubes, whereby primary refrigerant from the compressor either cools or heats the secondary refrigerant flowing through said third chamber to the air conditioning coil depending on whether the primary refrigerant is flowing from said compressor into said first conduit or into said second conduit.
Claim 5
Dependent Claim
50 words
A heat exchanger as defined in claim 2 wherein: said first conduit extends through the lower end of the body and the third chamber into communication with the second chamber, and said second conduit extends concentrically through the first conduit in the second chamber into communication with the first chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |