Combustion apparatus

Abstract

A combustion apparatus 2 has a fuel spraying nozzle 12 , a feed canal 16 and a return canal 17 , both the canals connected to the nozzle, with the former canal 16 feeding a fuel to the nozzle and with the latter canal 17 allowing an un-sprayed portion of the fuel to flow back. An electro-magnetic pump 18 disposed in the feed canal 16 serves to compress the fuel towards the nozzle 12 , and an injector valve 25 is disposed in the return canal 17 . The injector valve 25 is accommodated in a casing 50 consisting essentially of an inlet joint 46 and an outlet joint 17.

1 . A combustion apparatus comprising: 
 a spraying means for spraying a fuel,    a channel for flowing the fuel therethrough, and    an intermittently operating valve disposed in the channel so as to be closed and opened intermittently or periodically,    wherein at least part of the intermittently operating valve is enclosed with a casing.    
     
     
         2 . The combustion apparatus as defined in  claim 1 , 
 wherein the casing comprises an inlet joint connected to an inlet side of the intermittently operating valve and an outlet joint connected to an outlet side of the intermittently operating valve.    
     
     
         3 . The combustion apparatus as defined in  claim 1 , 
 wherein the casing consists essentially of an inlet joint connected to an inlet side of the intermittently operating valve and an outlet joint connected to an outlet side of the intermittently operating valve,    both which joints are engaged mutually, and    the valve being disposed in the space enclosed with the inlet joint and the outlet joint.    
     
     
         4 . The combustion apparatus as defined in  claim 1 , 
 wherein the casing consists essentially of an inlet joint connected to an inlet side of the intermittently operating valve and an outlet joint connected to an outlet side of the intermittently valve, and    the connecting portion with the inlet joint and the outlet joint being in close contact with each other.    
     
     
         5 . The combustion apparatus as defined in  claim 1 , 
 wherein the casing consists essentially of an inlet joint connected to an inlet side of the intermittently operating valve and an outlet joint connected to an outlet side of the intermittently operating valve,    the inlet joint and the outlet joint having an indentation respectively, so that the indentations jointly form a through-hole for letting therethrough a wiring connected to the valve, and    a seal which engages with each indentation so that it fits in the annular gap between the through-hole and a periphery of the wiring being mounted on the wiring.    
     
     
         6 . The combustion apparatus as defined in  claim 1 , 
 further comprising a fuel pump for sending the fuel to the spraying means and disposed in the channel, and    wherein the casing is directly connected to at least one of the fuel pump and the spraying means.    
     
     
         7 . The combustion apparatus as defined in  claim 1 , 
 further comprising a filling filled between the casing and the intermittently operating valve.    
     
     
         8 . A combustion apparatus comprising: 
 a spraying means for spraying a fuel,    a channel for flowing the fuel therethrough,    an intermittently operating valve disposed in the channel so as to be closed and opened intermittently or periodically,    a casing enclosing at least part of the valve, and    at least one fluidic component disposed in the channel and secured to the casing.    
     
     
         9 . The combustion apparatus as defined in  claim 8 , 
 further comprising a pressure buffer for buffering a pressure in the channel disposed in the channel and secured to the casing.    
     
     
         10 . The combustion apparatus as defined in  claim 8 , 
 further comprising a checking means disposed in the channel and secured to the casing for preventing the fuel flowing through the channel from flowing backward.    
     
     
         11 . The combustion apparatus as defined in  claim 8 , further comprising: 
 a pressure buffer for buffering the pressure in the channel and    a checking means in the channel, and    wherein the pressure buffer and the checking means are secured to the casing.    
     
     
         12 . The combustion apparatus as defined in  claim 8 , 
 wherein to the casing is secured at least part of the channel for flowing the fuel therethrough.    
     
     
         13 . A combustion apparatus comprising: 
 a spraying means for spraying a fuel,    a channel for flowing the fuel therethrough,    an intermittently operating valve disposed in the channel so as to be closed and opened intermittently or periodically,    a casing enclosing at least part of the intermittently operating valve, and    at least one elastic member interposed between the valve and the casing.    
     
     
         14 . The combustion apparatus as defined in  claim 13 , 
 wherein the intermittently operating valve comprises a valve body capable of being driven so as to close and open the valve periodically and a valve body housing for accommodating the valve body, and    the elastic member being mounted on the valve body housing.    
     
     
         15 . The combustion apparatus as defined in  claim 13 , 
 wherein the intermittently operating valve is connected to the casing via at least two connecting portions at both ends on inlet and outlet sides of the valve, and    wherein at least the connecting portion at the end of the outlet side is sealed up with and supported firmly by the elastic member.    
     
     
         16 . The combustion apparatus as defined in  claim 13 , 
 wherein the at least one elastic member comprises two elastic members, one of which is interposed between the casing and an inlet side of the valve and the other of which is interposed between the casing and an outlet side of the valve, and    wherein the elastic member interposed between the casing and the outlet side has a stronger elastic force than the elastic member interposed between the casing and the inlet side.    
     
     
         17 . The combustion apparatus as defined in  claim 13 , 
 wherein the intermittently operating valve comprises a built-in actuator reciprocating periodically so as to open and close the valve,    wherein the elastic member is interposed in the space between the casing and the valve where a force in the direction of the reciprocation of the actuator acts.    
     
     
         18 . The combustion apparatus as defined in  claim 13 , 
 wherein the intermittently operating valve has a built-in actuator reciprocating periodically so as to open and close the valve, and    further comprising:    a vibration-isolating member interposed between the valve and the casing and for buffering a force acting from the valve to the casing in the direction of the reciprocation of the actuator, and    a seal interposed between the valve and the casing so as to prevent the fuel flowing in and out of the valve from leaking.    
     
     
         19 . The combustion apparatus as defined in  claim 13 , 
 wherein the intermittently operating valve has a built-in actuator reciprocating periodically so as to open and close the valve, and    further comprising:    a vibration-isolating member interposed between the valve and the casing and for buffering a force acting from the valve to the casing in the direction of the reciprocation of the actuator, and    a seal interposed between the valve and the casing so as to prevent the fuel flowing in and out of the valve from leaking,    the vibration-isolating member having a stronger elastic force than the seal member.    
     
     
         20 . The combustion apparatus as defined in  claim 13 , 
 wherein the intermittently operating valve has a built-in actuator reciprocating periodically so as to open and close the valve, and    wherein the elastic member is interposed between the valve and the casing and comprises a vibration-isolating portion for buffering a force acting from the valve to the casing in the direction of the reciprocation of the actuator and a sealing portion for preventing the fuel flowing in and out of the valve from leaking and interposed between the valve and the casing.