# US 11,112,050 B2 · Multi-staged water manifold system for a water source heat pump

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- Number: US 11,112,050 B2
- Document ID: US11112050B2
- Status: Granted
- Kind: B2
- Application number: 16/504,635
- Filed: 2019-07-08
- Published: 2019-10-31
- Granted: 2021-09-07
- Earliest claimed: 2011-09-26
- Assignees: Lennox Industries Inc.
- Applicants: Lennox Industries Inc.
- Inventors: Steve Schneider; Eric Perez; Aylan Him; Miguel Montemayor
- Web page: https://patentgrep.com/patent/US11112050B2

## CPC

- F16L 55/055: Valves therefor
- F04B 49/065: {and making use of computers}
- F04B 49/20: by changing the driving speed
- F24D 3/18: using heat pumps
- F24D 17/02: using heat pumps
- F24D 19/1039: {the system uses a heat pump}
- F24F 1/36: Drip trays for outdoor units
- F25B 30/02: of the compression type
- F25B 39/04: Condensers
- F25B 49/02: for compression type machines, plants or systems
- F25B 49/027: {Condenser control arrangements}
- F24D 2200/123: Compression type heat pumps
- F24D 2200/24: Refrigeration
- F24F 11/54: using one central controller connected to several sub-controllers
- F24F 2140/30: Condensation of water from cooled air
- F25B 2339/047: Water-cooled condensers
- F25B 2400/06: Several compression cycles arranged in parallel
- Y02B 10/70: Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
- Y02B 30/12: Hot water central heating systems using heat pumps
- 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
- Y10T 29/49359: Cooling apparatus making, e.g., air conditioner, refrigerator
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F24D: DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR (using steam or condensate extracted or exhausted from steam engine plants for heating purposes F01K17/02)
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

One aspect, as provided herein, is directed to a multi-stage fluid control system for a fluid source heat pump system. This embodiment comprises compressors configured to operate as separate, heat exchange stages, condensers each being fluidly coupled to at least one of the compressors by refrigerant tubing and having intake ends coupled together by a fluid intake manifold. This embodiment further includes output conduits coupled to each of the condensers and that are couplable to a distal location. Further included is a modulating valve control system interposed the output conduits. The modulating valve control system is configured to stage a flow of fluid through the condensers based on a number of operating compressors.

## Claims

### Claim 1

A multi-stage fluid control system for a fluid source heat pump system, comprising:
a first heat exchange stage comprising:
a first heat exchange stage compressor and a first heat exchange stage refrigerant tubing configured to hold a first refrigerant;
a first heat exchange stage condenser fluidly coupled to the first heat exchange stage compressor to receive the first refrigerant via the first heat exchange stage refrigerant tubing, the first heat exchange stage condenser comprising a first heat exchange stage condensing coil for circulating fluid; and
a first heat exchange stage modulating valve control system coupled to a first heat exchange stage fluid output conduit;
a second heat exchange stage, comprising:
a second heat exchange stage compressor and a second heat exchange stage refrigerant tubing configured to hold a second refrigerant;
a second heat exchange stage condenser fluidly coupled to the second heat exchange stage compressor to receive the second refrigerant via the second heat exchange stage refrigerant tubing, the second heat exchange stage condenser comprising a second heat exchange stage condensing coil for circulating the fluid; and
a second heat exchange stage modulating valve control system coupled to a second heat exchange stage fluid output conduit;
wherein the first heat exchange stage modulating valve control system is configured to modulate a first valve of the first heat exchange stage modulating valve control system between a first and second position of the first valve;
wherein the second heat exchange stage modulating valve control system is configured to modulate a second valve of the second heat exchange stage modulating valve control system between a first and second position of the second valve; and
wherein the first and second heat exchange stage modulating valve control systems are configured to stage a flow of the fluid through the first and second heat exchange stage condensers based on a number of compressors that are operating;
wherein the first position of the first valve is a flow setpoint determined by the first heat exchange stage modulating valve control system and the second position of the first valve is a closed position; and
wherein the first position of the second valve is a flow setpoint determined by the second heat exchange stage modulating valve control system and the second position of the second valve is a closed position.

### Claim 2 (depends on 1)

The multi-stage fluid control system of claim 1, wherein each of the first and second heat exchange stage condensing coils is coupled to two or more compressors.

### Claim 3 (depends on 1)

The multi-stage fluid control system of claim 1, wherein:
the first heat exchange stage condensing coil comprises a first heat exchange stage fluid intake end coupled to a fluid intake manifold that receives the fluid from a first distal location;
a first heat exchange stage fluid exit end coupled to the first fluid output conduit that is couplable to a second distal location; and
the first heat exchange stage condensing coil is operable to transfer heat from the first refrigerant to the fluid.

### Claim 4 (depends on 3)

The multi-stage fluid control system of claim 3, wherein:
the second heat exchange stage condensing coil comprises a second heat exchange stage fluid intake end coupled to the fluid intake manifold;
a second heat exchange stage fluid exit end coupled to the second heat exchange stage fluid output conduit that is couplable to the second distal location; and
the second heat exchange stage condensing coil is operable to transfer heat from the second refrigerant to the fluid.

### Claim 5 (depends on 1)

The multi-stage fluid control system of claim 1, wherein the first heat exchange stage modulating valve control system includes one or more microcontrollers configured to operate the first valve of the first heat exchange stage modulating valve control system; and
the second heat exchange stage modulating valve control system includes one or more microcontrollers configured to operate the second valve of the second heat exchange stage modulating valve control system.

### Claim 6 (depends on 1)

The multi-stage fluid control system of claim 1, wherein the second heat exchange stage modulating valve control system includes one or more microcontrollers configured to operate the second valve of the second heat exchange stage modulating valve control system.

### Claim 7 (depends on 1)

The multi-stage fluid control system of claim 1, wherein the first heat exchange stage modulating valve control system is configured to set the first valve of the first heat exchange stage modulating valve control system in the first position to allow the fluid to flow to the first heat exchange stage condenser when the first heat exchange stage compressor is operating.

### Claim 8 (depends on 1)

The multi-stage fluid control system of claim 1, the second heat exchange stage modulating valve control system is configured to set the second valve of the second heat exchange stage modulating valve control system in the first position to allow the fluid to flow to the second heat exchange stage condenser when the second heat exchange stage compressor is operating.

### Claim 9 (depends on 1)

The multi-stage fluid control system of claim 1, further comprising an intake conduit coupled to the fluid intake manifold, the intake conduit configured to be couplable to a second distal location.

### Claim 10

A multi-stage water control system for a water source heat pump, comprising:
at least two compressors, each compressor of the at least two compressors being coupled to a refrigerant tubing for circulating refrigerant;
at least two condensers, each having a condensing coil with a water intake end, the at least two condensers being fluidly coupled together by a manifold;
a water intake conduit coupled to the manifold;
a first water output conduit coupled to a first condensing coil of the at least two condensing coils and a second water output conduit coupled to a second condensing coil of the at least two condensing coils;
a three-way valve coupled to each of the condensing coils of the at least two condensers and operable to divert fluid from inlets of each of the condensing coils to an outlet; and
a controller coupled to each a first water control valve and a second water control valve and configured to operate each of the first and second water control valves in a first position and a second position, wherein the first position is a flow setpoint determined by the controller and the second position is a closed position.

### Claim 11 (depends on 10)

The multi-stage water control system of claim 10, wherein each condensing coil of each of the at least two condensers is coupled to two or more compressors.

### Claim 12 (depends on 10)

The multi-stage water control system of claim 10, wherein each condenser of the at least two condensers being fluidly coupled to a different one of the at least two compressors and each condenser of the at least two condensers configured to receive the refrigerant from the refrigerant tubing to form multiple, separate refrigeration loops, the at least two condensers configured to transfer heat from the refrigerant to water.

### Claim 13 (depends on 10)

The multi-stage water control system of claim 10, wherein each of the first and second water output conduits comprise first and second water control valves, respectively, interposed therein.

### Claim 14 (depends on 10)

The multi-stage water control system of claim 10, wherein the controller is configured to control the first and second water control valves to stage a flow of water through one or both of the at least two condensers based on a number of compressors of the at least two compressors that are operating.

### Claim 15 (depends on 14)

The multi-stage water control system of claim 14, wherein the controller comprises one or more microcontrollers for controlling the first and second water control valves.

### Claim 16 (depends on 14)

The multi-stage water control system of claim 14, wherein the controller is configured to:
open the first water control valve for the fluid to flow to a first condenser of the at least two condensers only when a first compressor of the at least two compressors is operating.

### Claim 17 (depends on 14)

The multi-stage water control system of claim 14, wherein the controller is configured to:
open the second water control valve for the fluid to flow to a second condenser of the at least two condensers only when a second compressor of the at least two compressors is operating.

### Claim 18 (depends on 10)

The multi-stage water control system of claim 10, wherein the water intake conduit is configured to be couplable to a distal location.