Air conditioning system

Patent metadata

Field	Value
Publication number	US-12320540-B2
Application number	US-201917603763-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Apr 15, 2019
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

The present disclosure controls the supply of conditioned air to moderate the energy consumption by the heat source side in the supply of conditioned air using ducts in an air conditioning system. A heat exchanger unit includes a use side heat exchanger. A plurality of ducts distribute conditioned air that has passed through the use side heat exchanger of the heat exchanger unit. A plurality of fan units suction the conditioned air from the heat exchanger unit through the plurality of ducts, and supply the conditioned air to an air conditioned space. Each fan unit includes a fan motor that acts as an actuator configured to change an individual air supply amount of the conditioned air. A controller controls the plurality of fan motors to control the respective air supply amounts of the plurality of fan units.

First claim

The invention claimed is:

1. An air conditioning system provided with a heat exchanger unit, including a use side heat exchanger, that generates conditioned air through heat exchange in the use side heat exchanger and supplies the conditioned air to an air conditioned space through a plurality of distribution flow paths that communicate with the heat exchanger unit, comprising:
a controller;
a plurality of ducts used to distribute the conditioned air passing through the use side heat exchanger of the heat exchanger unit;
a plurality of fan units provided in correspondence with the plurality of ducts and configured to supply the conditioned air from the heat exchanger unit to the air conditioned space through the plurality of ducts; and
a plurality of actuators configured to change an air supply amount of the conditioned air to be supplied to the air conditioned space, wherein
each of the plurality of ducts is disposed in one of the plurality of distribution flow paths,
each of the plurality of fan units includes a first fan and is disposed in one of the plurality of distribution flow paths,
each of the plurality of actuators is disposed in one of the plurality of distribution flow paths,
the controller controls the plurality of actuators to control the air supply amounts of the plurality of fan units, and
the controller calculates the air supply amounts of each of the fan units from a temperature difference between an indoor air temperature adjusted by each of the plurality of fan units and a set temperature, and a fan temperature, and determines the plurality of instructions on a basis of the calculated air supply amounts.

2. The air conditioning system according to claim 1 , wherein
the controller controls the plurality of actuators in accordance with a plurality of instructions related to the air supply amounts of the plurality of fan units.

3. The air conditioning system according to claim 2 , wherein
the controller includes a main controller that transmits the plurality of instructions and at least one sub-controller that receives the plurality of instructions from the main controller, and
the at least one sub-controller controls the plurality of actuators on a basis of the plurality of instructions.

4. The air conditioning system according to claim 3 , wherein
each of the plurality of actuators is a fan motor that drives the first fan.

5. The air conditioning system according to claim 4 , wherein
the at least one sub-controller is a plurality of sub-controllers,
each of the plurality of fan units includes an air flow volume detector that detects the air flow volume passing through each unit, and
each of the plurality of sub-controllers controls a rotation speed of the fan motor such that the air flow volume detected by the air flow volume detector approaches the air supply amounts indicated by the instructions from the main controller.

6. The air conditioning system according to claim 1 , wherein
the heat exchanger unit includes a second fan, and
the controller controls the second fan on a basis of the air supply amounts of the plurality of fan units.

7. The air conditioning system according to claim 1 , wherein
the heat exchanger unit includes a second fan,
the controller includes a main controller that controls the plurality of actuators in accordance with a plurality of instructions related to the air supply amounts of the plurality of fan units, and a plurality of sub-controllers that receive the plurality of instructions transmitted by the main controller and control the plurality of actuators, and
the main controller controls the second fan to be a predetermined output with respect to a total combined air supply amount indicated by the plurality of instructions.

8. The air conditioning system according to claim 1 , wherein
the controller includes at least one sub-controller that controls the plurality of actuators and a main controller that communicates with the at least one sub-controller, and
the main controller is disposed in the heat exchanger unit.

9. The air conditioning system according to claim 1 , wherein
the controller includes at least one sub-controller that controls the plurality of actuators and a main controller that communicates with the at least one sub-controller, and
the main controller is disposed in one of the plurality of fan units.

10. The air conditioning system according to claim 1 , wherein
the controller includes at least one sub-controller that controls the plurality of actuators and a main controller that communicates with the at least one sub-controller, and
the main controller is disposed in a location other than the heat exchanger unit or the plurality of fan units.

11. The air conditioning system according to claim 1 , wherein
an air flow passing through the use side heat exchanger is produced by only air suction force of the plurality of fan units.

12. The air conditioning system according to claim 1 , wherein
the heat exchanger unit includes at least one of a heat medium temperature sensor that detect the temperature of a heat medium flowing through the use side heat exchanger or a pipe connected to the use side heat exchanger, and an intake temperature sensor that detects the temperature of air suctioned into the heat exchanger unit, and
the heat medium temperature sensor and/or the intake temperature sensor is connected to the main controller.

13. The air conditioning system according to claim 12 , wherein
the main controller uses a detected value from at least one of the heat medium temperature sensor and the intake temperature sensor to determine an instruction related to increasing or decreasing the air supply amounts.

14. The air conditioning system according to claim 1 , further comprising
a remote controller including a set temperature function that sets a temperature of the air conditioned space and a function that detects an indoor temperature of the air conditioned space, wherein
the main controller uses the set temperature of the remote controller and the indoor temperature detected by the remote controller to determine an instruction related to increasing or decreasing the air supply amounts.

15. The air conditioning system according to claim 1 ,
further comprising:
a compressor that compresses a refrigerant;
a heat source side heat exchanger that exchanges heat with the refrigerant circulating through the use side heat exchanger; and
an expansion valve that causes the refrigerant flowing between the use side heat exchanger and the heat source side heat exchanger to expand, wherein
the main controller is connected to the compressor and/or the expansion valve to control system operation.

16. The air conditioning system according to claim 1 ,
further comprising:
a compressor that compresses a refrigerant;
a heat source side heat exchanger that exchanges heat with the refrigerant circulating through the use side heat exchanger; and
an expansion valve that causes the refrigerant flowing between the use side heat exchanger and the heat source side heat exchanger to expand, wherein
the main controller calculates an operating frequency of the compressor and/or an opening degree of the expansion valve from a total air flow volume of air passing through the use side heat exchanger obtained by adding up the air supply amounts transmitted from all fan units, and the temperature of air suctioned into the heat exchanger unit.

17. The air conditioning system according to claim 1 ,
further comprising:
a compressor that compresses a refrigerant;
a heat sour

Assignees

• Daikin Ind Ltd

Inventors

• Tanaka Shuuichi
• Nouchi Yoshiteru
• Tatsumi Kouji
• Suzuki Ryouta
• Nakashima Taishi

Classifications

• F24F7/08

  with separate ducts for supplied and exhausted air {with provisions for reversal of the input and output systems} · CPC title

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title

• F24F3/0442

  with volume control at a constant temperature · CPC title

• F24F2140/20

  Heat-exchange fluid temperature · CPC title

• F24F2110/10

  Temperature · CPC title