US2022196284A1PendingUtilityA1

Combustion device and water heating device

57
Assignee: NORITZ CORPPriority: Dec 22, 2020Filed: Dec 2, 2021Published: Jun 23, 2022
Est. expiryDec 22, 2040(~14.4 yrs left)· nominal 20-yr term from priority
Inventors:Tatsuya Karaki
F24H 9/1836F23L 5/02F23D 14/62F23D 14/02F24H 1/145F23D 14/36F24H 9/02F24H 9/0063
57
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Claims

Abstract

A combustion device including a chamber, a burner, a fan case, and a fan is provided. The chamber has a top wall. On the top wall, an inflow port penetrating through the top wall along a first direction and in communication with an internal space of the chamber is formed. The burner is attached to the chamber, so as to be spaced apart from and face the top wall in the first direction. In the fan case, a discharge port and an intake port penetrating through the fan case along the first direction and in communication with an internal space of the fan case are formed. The discharge port is connected with the inflow port. The fan is provided in the internal space of the fan case. A rotation axis of the fan is along the first direction.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A combustion device, comprising:
 a chamber;   a burner;   a fan case; and   a fan,   wherein the chamber has a top wall,   on the top wall, an inflow port penetrating through the top wall along a first direction and in communication with an internal space of the chamber is formed,   the burner is attached to the chamber, so as to be spaced apart from and face the top wall in the first direction,   in the fan case, a discharge port penetrating through the fan case along the first direction and in communication with an internal space of the fan case is formed,   the discharge port is connected with the inflow port,   the fan is provided in the internal space of the fan case, and   a rotation axis of the fan is along the first direction.   
     
     
         2 . The combustion device as claimed in  claim 1 , wherein the fan case has a bottom wall partially overlapped with the chamber when viewed in a plan view, and
 the discharge port is formed in a portion of the bottom wall overlapped with the chamber.   
     
     
         3 . The combustion device as claimed in  claim 2 , wherein in a portion of the bottom wall not overlapped with the chamber, a suction port penetrating through the bottom wall along the first direction and in communication with the internal space of the fan case is formed. 
     
     
         4 . The combustion device as claimed in  claim 1 , wherein the chamber is further provided with a first periphery wall surrounding the inflow port and having a cylindrical shape protruding along the first direction,
 the fan case is further provided with a second periphery wall surrounding the discharge port and having a cylindrical shape protruding along the first direction,   the discharge port is connected to the inflow port by inserting the second periphery wall into inside of the first periphery wall, and   a seal member is provided between an inner periphery surface of the first periphery wall and an outer periphery surface of the second periphery wall.   
     
     
         5 . The combustion device as claimed in  claim 1 , wherein the inflow port is located at a center of the chamber when viewed in a plan view. 
     
     
         6 . The combustion device as claimed  claim 1 , wherein a height of the chamber in the first direction is smaller than an inner diameter of the inflow port. 
     
     
         7 . The combustion device as claimed in  claim 1 , wherein the chamber and the fan case are integrally formed. 
     
     
         8 . A water heating device, comprising:
 a housing;   a fix member; and   the combustion device as claimed in  claim 1 ,   wherein the housing is open on a side of a second direction orthogonal to the first direction, and   the fan case is attached to the chamber by the fix member from a side of the chamber in the second direction.   
     
     
         9 . The combustion device as claimed in  claim 2 , wherein the chamber is further provided with a first periphery wall surrounding the inflow port and having a cylindrical shape protruding along the first direction,
 the fan case is further provided with a second periphery wall surrounding the discharge port and having a cylindrical shape protruding along the first direction,   the discharge port is connected to the inflow port by inserting the second periphery wall into inside of the first periphery wall, and   a seal member is provided between an inner periphery surface of the first periphery wall and an outer periphery surface of the second periphery wall.   
     
     
         10 . The combustion device as claimed in  claim 2 , wherein the inflow port is located at a center of the chamber when viewed in a plan view. 
     
     
         11 . The combustion device as claimed in  claim 3 , wherein the inflow port is located at a center of the chamber when viewed in a plan view. 
     
     
         12 . The combustion device as claimed in  claim 4 , wherein the inflow port is located at a center of the chamber when viewed in a plan view. 
     
     
         13 . The combustion device as claimed  claim 2 , wherein a height of the chamber in the first direction is smaller than an inner diameter of the inflow port. 
     
     
         14 . The combustion device as claimed  claim 3 , wherein a height of the chamber in the first direction is smaller than an inner diameter of the inflow port. 
     
     
         15 . The combustion device as claimed  claim 4 , wherein a height of the chamber in the first direction is smaller than an inner diameter of the inflow port. 
     
     
         16 . The combustion device as claimed  claim 5 , wherein a height of the chamber in the first direction is smaller than an inner diameter of the inflow port. 
     
     
         17 . A water heating device, comprising:
 a housing;   a fix member; and   the combustion device as claimed in  claim 2 ,   wherein the housing is open on a side of a second direction orthogonal to the first direction, and   the fan case is attached to the chamber by the fix member from a side of the chamber in the second direction.   
     
     
         18 . A water heating device, comprising:
 a housing;   a fix member; and   the combustion device as claimed in  claim 3 ,   wherein the housing is open on a side of a second direction orthogonal to the first direction, and   the fan case is attached to the chamber by the fix member from a side of the chamber in the second direction.   
     
     
         19 . A water heating device, comprising:
 a housing;   a fix member; and   the combustion device as claimed in  claim 4 ,   wherein the housing is open on a side of a second direction orthogonal to the first direction, and   the fan case is attached to the chamber by the fix member from a side of the chamber in the second direction.   
     
     
         20 . A water heating device, comprising:
 a housing;   a fix member; and   the combustion device as claimed in  claim 5 ,   wherein the housing is open on a side of a second direction orthogonal to the first direction, and   the fan case is attached to the chamber by the fix member from a side of the chamber in the second direction.

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