Water heater

Patent metadata

Field	Value
Publication number	US-12429249-B2
Application number	US-202217959302-A
Country	US
Kind code	B2
Filing date	Oct 4, 2022
Priority date	Oct 25, 2021
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The disclosure provides a water heater. The water heater includes a water heater main body portion including a heat exchanger and a combustion device; a fan and a motor for driving the fan; an exterior case; and an air supply adapter mounted to an upper wall portion of the exterior case. The combustion device and the motor are positioned in a region near an upper portion within the exterior case. The combustion device is at least partly positioned between the air supply adapter and the fan in a plan view. An air outlet of the air supply adapter opens substantially horizontally, avoiding a direction directly facing the motor. The air flowing out from the air outlet is changed in direction by a side wall portion of the exterior case and flows to reach a portion of the motor.

First claim

What is claimed is:

1. A water heater, comprising:
a water heater main body portion comprising a heat exchanger for heating water and a combustion device for supplying combustion gas to the heat exchanger;
a fan for supplying a mixed gas or an air for combustion to the combustion device and a motor for driving the fan;
an exterior case having an upper wall portion and a side wall portion forming a housing space for housing the water heater main body portion, the fan, and the motor; and
an air supply adapter mounted to the upper wall portion and having an air outlet for having outside air flow into the exterior case;
wherein the combustion device and the motor are positioned in a region near an upper portion of the water heater within the exterior case, and the combustion device is at least partly positioned between the air supply adapter and the fan in a plan view, and
the air outlet of the air supply adapter opens substantially horizontally, avoiding a direction directly facing the motor, and the air flowing out from the air outlet is changed in direction by the side wall portion of the exterior case and flows to reach a position of the motor,
wherein the air outlet is configured to face the side wall portion at an oblique angle that deflects air flowing out from the air outlet around an exhaust duct of an exhaust gas flow passage forming member and into the side wall portion, wherein the side wall portion in turn deflects air to the position of the motor.

2. The water heater according to claim 1 , further comprising:
a guide member for guiding the air flowing out from the air outlet and hitting the side wall portion to flow toward the motor.

3. The water heater according to claim 2 ,
wherein the water heater main body portion comprises the exhaust gas flow passage forming member for guiding an exhaust gas that has completed heat recovery through the heat exchanger to an outside of the exterior case, and
the guide member is provided on the exhaust gas flow passage forming member.

4. The water heater according to claim 1 ,
wherein the water heater main body portion comprises:
an exhaust duct cover acting as the exhaust gas flow passage forming member for guiding an exhaust gas that has completed heat recovery through the heat exchanger to an outside of the exterior case, the exhaust duct cover is connected to an exhaust adapter that is mounted to the upper wall portion of the exterior case, and the exhaust duct cover is provided in the region near the upper portion in the exterior case, and

wherein the air outlet of the air supply adapter is positioned between an upper surface of the exhaust duct cover and the upper wall portion of the exterior case in a vertical height direction.

5. The water heater according to claim 2 ,
wherein the water heater main body portion comprises:
an exhaust duct cover acting as the exhaust gas flow passage forming member for guiding an exhaust gas that has completed heat recovery through the heat exchanger to an outside of the exterior case, the exhaust duct cover is connected to an exhaust adapter mounted to the upper wall portion of the exterior case, and the exhaust duct cover is provided in the region near the upper portion in the exterior case, and

wherein the air outlet of the air supply adapter is positioned between an upper surface of the exhaust duct cover and the upper wall portion of the exterior case in a vertical height direction.

6. The water heater according to claim 3 ,
wherein, the water heater main body portion comprises:
an exhaust duct cover acting as the exhaust gas flow passage forming member for guiding an exhaust gas that has completed heat recovery through the heat exchanger to an outside of the exterior case, the exhaust duct cover is connected to an exhaust adapter mounted to the upper wall portion of the exterior case, and the exhaust duct cover is provided in the region near the upper portion in the exterior case, and

wherein the air outlet of the air supply adapter is positioned between an upper surface of the exhaust duct cover and the upper wall portion of the exterior case in a vertical height direction.

7. The water heater according to claim 1 ,
wherein a cooling object member other than the motor is disposed in an air-flow path from the air supply adapter to the motor.

8. The water heater according to claim 2 ,
wherein a cooling object member other than the motor is disposed in an air-flow path from the air supply adapter to the motor.

9. The water heater according to claim 3 ,
wherein a cooling object member other than the motor is disposed in an air-flow path from the air supply adapter to the motor.

10. The water heater according to claim 4 ,
wherein a cooling object member other than the motor is disposed in an air-flow path from the air supply adapter to the motor.

Assignees

• Noritz Corp

Inventors

• Ogawa Kyohei
• Mizuno Shota

Classifications

• F24H9/02

  Casings; Cover lids; Ornamental panels · CPC title

• Y02B30/00

  Energy efficient heating, ventilation or air conditioning [HVAC] · CPC title

• F24H9/0031

  with means for changing or adapting the path of the flue gas · CPC title

• F24H9/0026

  in combustion gas channels · CPC title

• F24H9/001 Primary

  Guiding means · CPC title