Combustion heater and air conditioning system

Patent metadata

Field	Value
Publication number	US-12038197-B2
Application number	US-201917418736-A
Country	US
Kind code	B2
Filing date	Dec 20, 2019
Priority date	Dec 28, 2018
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A combustion heater generates heat by means of flame. The combustion heater is disposed adjacent to a refrigerant circuit filled with a combustible refrigerant. The combustion heater includes a combustion unit and a porous body. The combustion unit causes generation of flame. The porous body covers the combustion unit or a periphery of the combustion unit. The porous body at least partially covers both or one of a combustion space receiving combustible refrigerant leaking from the refrigerant circuit and a member in contact with the combustible refrigerant leaking from the refrigerant circuit. The porous body has a plurality of holes. The holes have a diameter d 1 equal to or less than an extinction diameter d of the combustible refrigerant.

First claim

The invention claimed is:

1. A combustion heater disposed adjacent to a refrigerant circuit filled with a combustible refrigerant and configured to generate heat by means of flame, the combustion heater comprising:
a combustion unit comprising a burner for causing generation of flame; and
a flow path forming pipe forming a flow path for gas having passed through the combustion unit, wherein
gas flow speed in at least one of the combustion unit, a periphery of the combustion unit, and an inlet of the flow path forming pipe is at least higher than combustion speed of the combustible refrigerant, and
the gas flow speed corresponds to flow speed of the gas in a direction opposite by 180 degrees from a propagation direction of the generated flame.

2. An air conditioning system comprising:
a refrigeration apparatus including the refrigerant circuit filled with the combustible refrigerant; and
the combustion heater according to claim 1 , the combustion heater being disposed adjacent to the refrigeration apparatus.

Assignees

• Daikin Ind Ltd

Inventors

• Yajima Ryuuzaburou

Classifications

• F25B49/005

  of safety devices (F25B49/02 and F25B49/04 take precedence) · CPC title

• F23D14/145

  combustion being stabilised at a screen or a perforated plate · CPC title

• F25B30/02

  of the compression type · CPC title

• F24F11/67

  Switching between heating and cooling modes · CPC title

• F24F2110/12

  of the outside air · CPC title