# US 10,309,685 B2 · Integrated heating, ventilation, air conditioning, and refrigeration system

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- Number: US 10,309,685 B2
- Document ID: US10309685B2
- Status: Granted
- Kind: B2
- Application number: 15/606,223
- Filed: 2017-05-26
- Published: 2017-09-14
- Granted: 2019-06-04
- Earliest claimed: 2010-07-07
- Assignees: Hussmann Corporation
- Applicants: Hussmann Corporation
- Inventors: Norm E. Street; Roger J. Voorhis; Doron Shapiro
- Web page: https://patentgrep.com/patent/US10309685B2

## CPC

- F24F 11/81: by controlling the air supply to heat-exchangers or bypass channels
- F24F 11/30: for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F 12/001: {with heat-exchange between supplied and exhausted air}
- F24F 13/10: movable, e.g. dampers
- F25B 7/00: Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit (F25B9/00 takes precedence)
- F24F 2012/007: {using a by-pass for bypassing the heat-exchanger}
- F25B 2400/22: Refrigeration systems for supermarkets
- Y02B 30/56: Heat recovery units
- 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

## Abstract

A combined heating, ventilation, air conditioning, and refrigeration (“HVACR”) system including an HVAC sub-system and a refrigeration sub-system. The HVAC sub-system is in communication with an open space of an indoor environment and includes a first condenser, a first evaporator, and a first compressor at least partially defining a first refrigerant circuit circulating a first refrigerant for selectively conditioning an airflow within the HVAC sub-system that conditions the open space. The refrigeration sub-system is in communication with an enclosed space within the indoor environment and includes a second condenser, a second evaporator, and a second compressor and at least partially defining a second refrigerant circuit circulating a second refrigerant for selectively conditioning the enclosed space. Heat from the second refrigerant is selectively transferred to the airflow within the second condenser to reheat the airflow prior to the airflow being discharged into the open space.

## Claims

### Claim 1

A combined heating, ventilation, air conditioning, and refrigeration (“HVACR”) system comprising:
a heating, ventilation, and air conditioning (“HVAC”) sub-system in communication with an open space of an indoor environment, the HVAC sub-system including a first condenser, a first evaporator, and a first compressor arranged in series with each other and at least partially defining a first refrigerant circuit circulating a first refrigerant for selectively conditioning an airflow within the HVAC sub-system, the airflow directed to the indoor environment to condition the open space; and
a refrigeration sub-system in communication with an enclosed space within the indoor environment, the refrigeration sub-system including a second condenser, a second evaporator, and a second compressor arranged in series with each other and at least partially defining a second refrigerant circuit circulating a second refrigerant for selectively conditioning the enclosed space,
wherein heat from the second refrigerant is selectively transferred to the airflow within the second condenser to reheat the airflow prior to the airflow being discharged into the open space.

### Claim 2 (depends on 1)

The HVACR system of claim 1, further comprising an airflow management system including an airflow circuit circulating the airflow and an air damper system in communication with the airflow circuit to selectively direct at least a portion of the airflow through the second condenser.

### Claim 3 (depends on 2)

The HVACR system of claim 2, wherein the air damper system includes an air damper to control the airflow through the second condenser such that heat from the second refrigerant within the second condenser can be fully rejected to an ambient environment, partially rejected to the ambient environment and partially rejected to the airflow, or fully rejected to the airflow.

### Claim 4 (depends on 3)

The HVACR system of claim 3, wherein the airflow circuit includes a bypass portion to bypass at least some of the airflow around the second condenser without passing through the second condenser.

### Claim 5 (depends on 4)

The HVACR system of claim 4, wherein the air damper is step-wise movable between the first position and the second position.

### Claim 6 (depends on 3)

The HVACR system of claim 3, wherein the air damper is movable between a first position and a second position to selectively control a source of the airflow through the second condenser, and wherein the source includes at least one of supply air and ambient air.

### Claim 7 (depends on 6)

The HVACR system of claim 6, wherein the air damper is further movable to a third position between the first position and the second position.

### Claim 8 (depends on 3)

The HVACR system of claim 3, wherein the refrigeration sub-system includes two second condensers, and wherein at least a portion of the airflow is selectively directed through at least one of the second condensers.

### Claim 9 (depends on 8)

The HVACR system of claim 8, wherein a portion of the airflow is directed to the indoor environment without being directed through the second condensers.

### Claim 10 (depends on 8)

The HVACR system of claim 8, wherein the air damper system includes a first air damper associated with one of the second condensers and a second air damper associated with the other of the second condensers, and wherein each of the first air damper and the second air damper has a first position and a second position.

### Claim 11 (depends on 3)

The HVACR system of claim 3, wherein the air damper is a first air damper associated with the second condenser, and wherein the air damper system further includes a second air damper associated with the first evaporator to selectively control the airflow through the first evaporator such that a source of the airflow entering the first evaporator includes one or more of return air, makeup air, and ambient air.

### Claim 12 (depends on 11)

The HVACR system of claim 11, wherein the first air damper is located adjacent one of an inlet and an air outlet of the second condenser and the second air damper is located adjacent an air inlet of the first evaporator.

### Claim 13 (depends on 12)

The HVACR system of claim 12, wherein the first air damper is located adjacent the air inlet, the HVACR system further comprising a third air damper located adjacent an air outlet of the second condenser.

### Claim 14

A combined heating, ventilation, air conditioning, and refrigeration (“HVACR”) system comprising:
a modular evaporator section in communication with an open space of an indoor environment, the evaporator section including an evaporator and a first air moving device positioned to direct air through the evaporator and toward the open space;
a modular condenser section selectively in communication with the indoor environment and an ambient environment, the condenser section including a condenser and a second air moving device positioned to direct air through the condenser;
an air damper system including a plurality of air dampers positioned to control airflow between the indoor environment, the ambient environment, and the evaporator section and the condenser section; and
a heating, ventilation, and air conditioning (“HVAC”) sub-system in communication with the open space of the indoor environment and defining a first refrigerant circuit, and a refrigeration sub-system in communication with an enclosed space within the indoor environment and defining a second refrigerant circuit, wherein the condenser is associated with the refrigeration sub-system and partially defines the second refrigerant circuit, and wherein the airflow through the condenser is associated with one or both of the ambient environment and the HVAC sub-system.

### Claim 15 (depends on 14)

The HVACR system of claim 14, wherein the condenser section is proximate to the evaporator section.

### Claim 16 (depends on 15)

The HVACR system of claim 15, wherein a partition separates the condenser section from the evaporator section.

### Claim 17 (depends on 14)

The HVACR system of claim 14, wherein the evaporator section and the condenser section are located on a rooftop.

### Claim 18 (depends on 14)

The HVACR system of claim 14, wherein the air damper system includes a first air damper located adjacent an inlet to the evaporator section to control airflow through the evaporator, and a second air damper located adjacent one of an inlet and an outlet of the condenser section to control airflow through the condenser section.

### Claim 19 (depends on 18)

The HVACR system of claim 18, wherein the second air damper is located adjacent the inlet to the condenser section, and wherein the air damper system further includes a third air damper located adjacent the outlet of the condenser section to control the airflow through the condenser section.

### Claim 20 (depends on 19)

The HVACR system of claim 19, wherein the second air damper is movable between a first position and a second position to selectively control a source of the airflow through the condenser section, and wherein the third air damper is movable between a first position and a second position to selectively control a destination of the airflow.

### Claim 21 (depends on 20)

The HVACR system of claim 20, wherein the source of the airflow through the condenser section includes at least one of ambient air and supply air from the evaporator section, and wherein the destination of the airflow includes at least one of the indoor environment and the ambient environment.

### Claim 22 (depends on 19)

The HVACR system of claim 19, wherein the first air damper is movable between a first position and a second position to selectively control a source of the airflow through the evaporator section, and wherein the source of the airflow includes at least one of return air, makeup air, and ambient air.

### Claim 23 (depends on 14)

The HVACR system of claim 14, wherein each of the plurality of air dampers is step-wise movable between a first position and a second position to control airflow through one or both of the evaporator section and the condenser section.

### Claim 24 (depends on 14)

The HVACR system of claim 14, wherein one of the plurality of dampers is located adjacent the condenser section to control the airflow through the condenser such that heat from refrigerant within the condenser can be fully rejected to the ambient environment, partially rejected to the ambient environment and partially rejected to the airflow through the condenser section, or fully rejected to the airflow through the condenser section.

### Claim 25 (depends on 14)

The HVACR system of claim 14, wherein the condenser is a first condenser, the condenser section further including a second condenser associated with the HVAC sub-system and partially defining the first refrigerant circuit, wherein one air damper of the plurality of air dampers is positioned adjacent an inlet to the condenser section and another air damper of the plurality of air dampers is positioned adjacent an outlet to the condenser section to control the airflow through the first condenser and the second condenser.