Patent US3994142A successfully refreshed from Google Patents.
US3994142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat reclaim for refrigeration systems
Assignee: Ardco Inc
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Filing: 1976-01-12
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Granted: 1976-11-30
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Expires: 1996-01-12
Abstract
Abstract A refrigeration system which has two condensers located in different environments and intended for use alternately, a valve arrangement for determining which of the two condensers is to be operative for rejecting heat and which is to be inoperative, which includes control valves in the outlet conduit of each of the condensers arranged so that when one is open, the other is closed, and vice versa.
Inventors
- 👤 Daniel E. Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
F; F25; F25B; F25B29/00; F25B1/00; F25B49/00; F25B49/02; F25B49/027; F25B2400/00; F25B2400/22; F25B6/00; F25B6/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
210 words
An improved compression type refrigeration system including a conduit connected expansion device, evaporator, a compressor having a discharge port and at least a first and a second condenser said first condenser having an inlet and an outlet, said second condenser having an inlet and an outlet, discharge conduit means connecting the compressor discharge port with the first and second condenser inlets; a first liquid conduit connected at one end to the first condenser outlet, a second liquid conduit connected to the second condenser outlet, wherein the improvement comprises first valve means located in said first liquid conduit, said valve means having an open position for allowing flow from said first condenser and a closed position for preventing flow from said first condenser and for causing said first condenser to fill with liquid refrigerant; second valve means located in second liquid conduit, said second valve means having an open position for allowing flow from said second condenser and a closed position for preventing flow from said second condenser and for causing said second condenser to fill with liquid refrigerant and control means acting to open the second valve means when the first valve means is closed and acting to close the second valve means when the first valve means is open.
Claim 2
Dependent Claim
210 words
An improved compression type refrigeration system including a conduit connected expansion device, evaporator, a compressor having a discharge port and at least a first and a second condenser said first condenser having an inlet and an outlet, said second condenser having an inlet and an outlet, discharge conduit means connecting the compressor discharge port with the first and second condenser inlets; a first liquid conduit connected at one end to the first condenser outlet, a second liquid conduit connected to the second condenser outlet, wherein the improvement comprises first valve means located in said first liquid conduit, said valve means having an open position for allowing flow from said first condenser and a closed position for preventing flow from said first condenser and for causing said first condenser to fill with liquid refrigerant; second valve means located in second liquid conduit, said second valve means having an open position for allowing flow from said second condenser and a closed position for preventing flow from said second condenser and for causing said second condenser to fill with liquid refrigerant and control means acting to open the second valve means when the first valve means is closed and acting to close the second valve means when the first valve means is open.
Claim 3
Dependent Claim
17 words
A refrigeration system as in claim 1 where the first and second valve means are solenoid valves.
Claim 4
Dependent Claim
27 words
A system as in claim 2 where one solenoid valve closes when its coil is energized and the other solenoid valve opens when its coil is energized.
Claim 5
Dependent Claim
24 words
A refrigeration system as in claim 1 which includes a capacity control for partially reducing the capacity of at least one of the condensers.
Claim 6
Dependent Claim
34 words
A system as in claim 1 which includes pressure actuated means which acts to reverse the open-closed conditions of the first and second valve means when the high side pressure exceeds a preset value.
Claim 7
Dependent Claim
122 words
An improved compression type refrigeration system including a compressor having a discharge port, a first condenser having an inlet and an outlet, a second condenser having an inlet and an outlet, discharge conduit means connecting the compressor discharge port with the first and second condenser inlets; a first liquid conduit connected at one end to the first condenser outlet, a second liquid conduit connected to the second condenser outlet, wherein the improvement comprises first valve means located in said first liquid conduit, said valve means having open and closed positions for allowing and preventing flow in said first liquid outlet conduit, spring-loaded check valve means located in second liquid conduit and control means acting to open and close said first valve means.
Claim 8
Dependent Claim
122 words
An improved compression type refrigeration system including a compressor having a discharge port, a first condenser having an inlet and an outlet, a second condenser having an inlet and an outlet, discharge conduit means connecting the compressor discharge port with the first and second condenser inlets; a first liquid conduit connected at one end to the first condenser outlet, a second liquid conduit connected to the second condenser outlet, wherein the improvement comprises first valve means located in said first liquid conduit, said valve means having open and closed positions for allowing and preventing flow in said first liquid outlet conduit, spring-loaded check valve means located in second liquid conduit and control means acting to open and close said first valve means.
Claim 9
Dependent Claim
108 words
An improved compression type refrigeration system including a compressor having a discharge port, a first condenser having an inlet and an outlet, a second condenser having an inlet and an outlet, discharge conduit means connecting the compressor discharge port with the first and second condenser inlets; a first liquid conduit connected at one end to the first condenser outlet, a second liquid conduit connected to the second condenser outlet, wherein the improvement comprises valve means having a first inlet, a second inlet and an outlet, said first inlet connected to the first condenser outlet, said second inlet connected to said second condenser outlet, and control means for alternately
Claim 10
Dependent Claim
108 words
An improved compression type refrigeration system including a compressor having a discharge port, a first condenser having an inlet and an outlet, a second condenser having an inlet and an outlet, discharge conduit means connecting the compressor discharge port with the first and second condenser inlets; a first liquid conduit connected at one end to the first condenser outlet, a second liquid conduit connected to the second condenser outlet, wherein the improvement comprises valve means having a first inlet, a second inlet and an outlet, said first inlet connected to the first condenser outlet, said second inlet connected to said second condenser outlet, and control means for alternately
Claim 11
Dependent Claim
21 words
A. allowing flow from the first inlet to the outlet and preventing flow from the second inlet to the outlet, and
Claim 12
Dependent Claim
21 words
A. allowing flow from the first inlet to the outlet and preventing flow from the second inlet to the outlet, and
Claim 13
Dependent Claim
20 words
B. allowing flow from the second inlet to the outlet and preventing flow from the first inlet to the outlet.
Claim 14
Dependent Claim
20 words
B. allowing flow from the second inlet to the outlet and preventing flow from the first inlet to the outlet.
Claim 15
Dependent Claim
99 words
An improved method of controlling refrigerant vapor flow to multiple condensers in a refrigeration system comprising the steps of; 1. a. allowing refrigerant outflow from a first condenser; b. simultaneously preventing refrigerant outflow from a second condenser; whereby liquid refrigerant is caused to accumulate in the second condenser, thereby preventing further access to and condensation of refrigerant vapor therein; and alternately, 2. a. preventing refrigerant outflow from said first condenser b. allowing refrigerant outflow from said second condenser; whereby liquid refrigerant is caused to accumulate in the first condenser, preventing further access to and condensation of refrigerant vapor therein.
Claim 16
Dependent Claim
99 words
An improved method of controlling refrigerant vapor flow to multiple condensers in a refrigeration system comprising the steps of; 1. a. allowing refrigerant outflow from a first condenser; b. simultaneously preventing refrigerant outflow from a second condenser; whereby liquid refrigerant is caused to accumulate in the second condenser, thereby preventing further access to and condensation of refrigerant vapor therein; and alternately, 2. a. preventing refrigerant outflow from said first condenser b. allowing refrigerant outflow from said second condenser; whereby liquid refrigerant is caused to accumulate in the first condenser, preventing further access to and condensation of refrigerant vapor therein.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |