# US 2025/0093069 A1 · Thermostat for controlling operation of a heating,ventilation, and air conditioning (hvac) system

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- Number: US 2025/0093069 A1
- Document ID: US20250093069A1
- Status: Published application
- Kind: A1
- Application number: 18/827,697
- Filed: 2024-09-07
- Published: 2025-03-20
- Earliest claimed: 2023-09-18
- Assignees: Carrier Corporation
- Applicants: Carrier Corporation
- Inventors: Ron Kielkowski
- Web page: https://patentgrep.com/patent/US20250093069A1

## CPC

- F24F 11/88: Electrical aspects, e.g. circuits
- F24F 11/30: for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F 11/46: Improving electric energy efficiency or saving
- F24F 11/52: Indication arrangements, e.g. displays
- F24F 11/56: Remote control
- F24F 11/58: using Internet communication
- F24F 11/63: Electronic processing
- F24F 2110/10: Temperature
- 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)

## Abstract

Embodiments of the disclosure describe systems and methods for controlling operation of a heating, ventilation, and air conditioning (HVAC) system by a thermostat. The thermostat comprises a set of wires. The method comprises determining an operation to be performed by the HVAC system based on at least one of a user input or one or more parameters associated with an indoor area. The method further comprises transmitting, to the HVAC system via the set of wires, an HVAC signal indicative of the operation to be performed. At least one wire of the set of wires is configured to communicate power signals and data signals associated with the HVAC signal. The method further comprises causing the HVAC system to perform the operation based on the transmitted HVAC signal. The set of wires comprises a common (C) line, a power line (R), and an outdoor activation (Y) line.

## Claims

### Claim 1

A thermostat to control operation of a heating, ventilation, and air conditioning (HVAC) system, the thermostat comprising:
a set of wires;
a memory; and
one or more processors communicatively coupled to the memory and the set of wires, the one or more processors being configured to:
determine an operation to be performed by the HVAC system based on at least one of a user input or one or more parameters associated with an indoor area, the indoor area being associated with the thermostat and the HVAC system;
transmit, to the HVAC system via the set of wires, an HVAC signal indicative of the operation to be performed, wherein at least one wire of the set of wires is configured to communicate power signals and data signals associated with the HVAC signal; and
cause the HVAC system to perform the operation based on the transmitted HVAC signal,
wherein the set of wires comprises a common (C) line, a power line (R), and an outdoor activation (Y) line.

### Claim 2 (depends on 1)

The thermostat of claim 1, wherein the one or more processors are configured to:
monitor the one or more parameters associated with the indoor area;
receive the user input indicative of a command corresponding to the operation to be performed; and
generate the HVAC signal based on at least one of the monitored environmental parameters and the received user input.

### Claim 3 (depends on 1)

The thermostat of claim 1, wherein:
the at least one wire of the set of wires is associated with a powered state and an unpowered state, and
the at least one wire is configured to communicate the data signals in the powered state and in the unpowered state.

### Claim 4 (depends on 1)

The thermostat of claim 1, wherein:
the HVAC system comprises a first HVAC unit and a second HVAC unit, and
the one or more processors are configured to transmit the data signals to the first HVAC unit and the second HVAC unit via the Y line.

### Claim 5 (depends on 4)

The thermostat of claim 4, wherein the one or more processors are configured to simultaneously transmit the HVAC signal to the first HVAC unit and the second HVAC unit.

### Claim 6

A method for controlling operation of a heating, ventilation, and air conditioning (HVAC) system by a thermostat, the thermostat comprising a set of wires, the method comprising:
determining an operation to be performed by the HVAC system based on at least one of a user input or one or more parameters associated with an indoor area, the indoor area being associated with the thermostat and the HVAC system;
transmitting, to the HVAC system via the set of wires, an HVAC signal indicative of the operation to be performed, wherein at least one wire of the set of wires is configured to communicate power signals and data signals associated with the HVAC signal; and
causing the HVAC system to perform the operation based on the transmitted HVAC signal,
wherein the set of wires comprises a common (C) line, a power line (R), and an outdoor activation (Y) line.

### Claim 7 (depends on 6)

The method of claim 6, further comprising:
monitoring the one or more parameters associated with the indoor area;
receiving the user input indicative of a command corresponding to the operation to be performed; and
generating the HVAC signal based on at least one of the monitored environmental parameters and the received user input.

### Claim 8 (depends on 6)

The method of claim 6, wherein:
the at least one wire of the set of wires is associated with a powered state and an unpowered state, and
the at least one wire is configured to communicate the data signals in the powered state and in the unpowered state.

### Claim 9 (depends on 6)

The method of claim 6, wherein:
the HVAC system comprises a first HVAC unit and a second HVAC unit, and
the one or more processors are configured to transmit the data signals to the first HVAC unit and the second HVAC unit via the Y line.

### Claim 10 (depends on 9)

The method of claim 9, further comprising simultaneously transmitting the HVAC signal to the first HVAC unit and the second HVAC unit.