# US 11,994,320 B2 · Bernoulli heat pump having laminar flow of refrigerant

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- Number: US 11,994,320 B2
- Document ID: US11994320B2
- Status: Granted
- Kind: B2
- Application number: 17/624,854
- Filed: 2020-07-09
- Published: 2022-08-18
- Granted: 2024-05-28
- Earliest claimed: 2019-07-10
- Assignees: Ventvia Ltd.
- Applicants: Ventvia Ltd.
- Inventors: Itzhak Merksamer
- Web page: https://patentgrep.com/patent/US11994320B2

## CPC

- F25B 23/00: Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
- F25B 9/004: {the refrigerant being air}
- Y02B 30/52: Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

An improved Bernoulli heat pump, wherein the intake section of a Venturi tube is structured so that when the refrigerant flows from the intake section into and through most of the middle (narrow) section, its flow is essentially laminar. Additionally, a second, bi-phase, component is added to the flowing gaseous refrigerant. Part of the bi-phase component evaporates, reaching super saturation, which state is maintained in the middle section, owing to the laminar flow, increasing heat absorption.

## Claims

### Claim 1

A Bernoulli heat pump, for transferring heat from a heat source to a heat sink, comprising —
a Venturi tube, including a converging intake section, a narrow middle section, and a diverging exhaust section, all interconnected co-axially about a longitudinal axis of the Venturi tube and in tandem, the middle section being in thermal communication with the heat source, and
a blower, disposed at an exhaust end of the exhaust section and operative to cause a refrigerant to flow through the Venturi tube,
an upstream end of the intake section and a downstream side of the blower being in fluid communication with the surrounding atmosphere and said refrigerant including air;
wherein said Venturi tube further includes one or more nozzles, disposed at the intake section and operative to spray a bi-phase fluid into air flowing therethrough and
wherein the heat pump further comprises —
a precipitation tank, disposed in the refrigerant flow path downstream the exhaust section and configured with a bottom to accumulate precipitated liquid, and
a liquid feed tube, one end of which is fluidly connected to the bottom of the precipitation tank and a second end of which is directly or indirectly in fluid communication with any of said nozzles.

### Claim 2 (depends on 1)

The heat pump of claim 1, wherein said bi-phase fluid includes a non-aqueous fluid, the heat pump further comprising —
a fluid extraction box, disposed in the refrigerant flow path downstream the exhaust section or the blower and including porous material operative to absorb or adsorb non-aqueous fluid from the refrigerant and
means for flushing extracted non aqueous fluid from the fluid extraction box to the bottom of the precipitation tank.