US3807192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system with combination capacity and compressor overload control
Assignee: Paul Mueller Co
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Filing: 1971-12-01
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Granted: 1974-04-30
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Expires: 1991-12-01
Abstract
Abstract A refrigeration system, and more particularly one having means for controlling against compressor overload and excess system capacity, comprising a compressor means, a condenser means connected at the output of the compressor means for condensing refrigerant discharged from the compressor means. An expansion device is connected between the output of the condenser means and the input of an evaporator means. A vortex amplifier is connected between the output of the evaporator means and the input of the compressor means, the amplifier having a main inlet and an outlet through which the refrigerant passes from the evaporator means to the compressor means, and a control inlet connected to a source of control fluid. Means are provided for varying discharge of the control fluid to the control input of the vortex amplifier in response to variations in compressor load from a prescribed load value, and to variations in system capacity from a prescribed capacity value.
Inventors
- 👤 M Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:38
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/20; F25B2400/00; F25B2400/02; F25B2600/00; F25B2600/02; F25B2600/026; F25B2600/0261; F25B2600/25; F25B2600/2501; F25B40/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
236 words
A refrigeration system comprising a compressor means, a condenser means for condensing refrigerant from the output of the compressor means, an evaporator means for evaporating the refrigerant, an expansion device connected between the output of the condenser means and the input of the evaporator means, a vortex amplifier having a control input and a main input and output, means connecting the output of the evaporator means to the main input of the vortex amplifier, means connecting the output of the vortex amplifier to the input of the compressor means, means for supplying a controlled amount of fluid to the control input of the vortex amplifier when the capacity of the system exceeds a prescribed value to restrict the flow of refrigerant from the evaporator means to the compressor means and increase the pressure at the output of the evaporator means to above a selected minimum pressure thereby reducing the capacity of the system, and means for supplying a controlled amount of fluid to the control input of the vortex amplifier when the compressor load exceeds a prescribed value to reduce the pressure at the input of the compressor means to below a selected maximum pressure thereby reducing its load, whereby the system operates between a minimum pressure at the output of the evaporator and a maximum pressure at the input of the compressor to control the capacity of the system and prevent overload of the compressor.
Claim 2
Dependent Claim
236 words
A refrigeration system comprising a compressor means, a condenser means for condensing refrigerant from the output of the compressor means, an evaporator means for evaporating the refrigerant, an expansion device connected between the output of the condenser means and the input of the evaporator means, a vortex amplifier having a control input and a main input and output, means connecting the output of the evaporator means to the main input of the vortex amplifier, means connecting the output of the vortex amplifier to the input of the compressor means, means for supplying a controlled amount of fluid to the control input of the vortex amplifier when the capacity of the system exceeds a prescribed value to restrict the flow of refrigerant from the evaporator means to the compressor means and increase the pressure at the output of the evaporator means to above a selected minimum pressure thereby reducing the capacity of the system, and means for supplying a controlled amount of fluid to the control input of the vortex amplifier when the compressor load exceeds a prescribed value to reduce the pressure at the input of the compressor means to below a selected maximum pressure thereby reducing its load, whereby the system operates between a minimum pressure at the output of the evaporator and a maximum pressure at the input of the compressor to control the capacity of the system and prevent overload of the compressor.
Claim 3
Dependent Claim
47 words
The system of claim 1 further comprising a valve means in the flow of control fluid, the valve means being actuatable to allow the control fluid to pass to the control input of the vortex amplifier when the system capacity or compressor load exceeds the prescribed value.
Claim 4
Dependent Claim
49 words
The system of claim 2 including means for sensing the capacity of the system between the output of the evaporator means and the vortex amplifier, means for sensing compressor load between the vortex amplifier and the compressor means, the valve means being actuatable in response to the sensing means.
Claim 5
Dependent Claim
16 words
The system of claim 3 wherein at least one of the sensing means is temperature responsive.
Claim 6
Dependent Claim
16 words
The system of claim 3 wherein at least one of the sensing means is pressure responsive.
Claim 7
Dependent Claim
29 words
The system of claim 1 wherein the fluid supplied to the control input of the vortex amplifier is supplied from the refrigerant at the output of the compressor means.
Claim 8
Dependent Claim
78 words
The system of claim 1 wherein the expansion device is a subcooling valve, the system further comprising a liquid cooling coil between the subcooling valve and the evaporator means through which the refrigerant from the subcooling valve to the evaporator means must flow, and an accumulator between the output of the evaporator means and the vortex amplifier for accumulating liquid refrigerant from the evaporator means, the liquid cooling coil being immersed in the liquid refrigerant within the accumulator.
References Cited (Backward Citations)
US3631684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |