Air-conditioning unit

Abstract

An air-conditioning unit, in which at least a lead wire ( 14 g ) of a temperature sensor ( 14 ) is inserted in a cylindrically formed grommet ( 16 ), is disclosed. A cylindrical seal portion ( 16 a ) fitted in a hole portion ( 15 ) of a case ( 11 ) is formed at an end of the grommet ( 16 ). The lead wire ( 14 g ) is fitted relatively displaceably on the inner periphery of the cylindrical seal portion ( 16 a ). A cylindrical fixed portion ( 16 d ) fixed with the lead wire ( 14 g ) is formed at the other end of the grommet ( 16 ). A bellows ( 16 b ) is formed between the cylindrical seal portion ( 16 a ) and the cylindrical fixed portion ( 16 d ).

1 . An air-conditioning unit comprising a heat exchanger supported afloat through a buffer member in a case forming an air path, and a sensor for detecting a physical value indicating the condition of the heat exchanger, 
 wherein the sensor includes a sensor element, at least a lead wire electrically connected to the sensor element and a sensor holder assembled on the heat exchanger for holding the sensor element,    wherein the case includes a hole portion for leading the lead wire out of the case,    wherein the lead wire is inserted into the cylindrical interior of a grommet cylindrically formed of an elastic material having a high flexibility,    wherein a cylindrical seal portion is fitted in the hole portion and pressed against the wall surface of the case at an end of the grommet,    wherein the lead wire is fitted relatively displaceably on the cylindrical seal portion on the inner periphery of the cylindrical seal portion,    wherein a fixed portion fixed with the lead wire is formed at the other end of the grommet, and    wherein the portion of the grommet between the cylindrical seal portion and the fixed portion is formed as a bellows.    
   
   
       2 . An air-conditioning unit according to  claim 1 , 
 wherein the case is configured by integrally fastening a plurality of division cases, and    wherein the hole portion is formed in the fitting coupling surface of the plurality of the division cases.    
   
   
       3 . An air-conditioning unit according to  claim 1 , 
 wherein the sensor holder includes a projection extending to the fixed portion, and    wherein the fixed portion and the lead wire are fixed on the projection.    
   
   
       4 . An air-conditioning unit according to  claim 3 , 
 wherein the fixed portion is cylindrical and the projection is inserted into the cylinder of the fixed portion.    
   
   
       5 . An air-conditioning unit according to  claim 4 , 
 wherein the outer diameter of the cylinder of the fixed portion is smaller than the outer diameter of the cylindrical seal portion.    
   
   
       6 . An air-conditioning unit according to  claim 4 , 
 wherein a bell-shaped enlarged portion having a progressively increasing diameter is formed at the end of the cylindrical fixed portion nearer to the sensor holder.    
   
   
       7 . An air-conditioning unit according to  claim 1 , 
 wherein the heat exchanger is a cooling heat exchanger for cooling and dehumidifying the air,    wherein the sensor is arranged downstream of the cooling heat exchanger in the air flow, so that the condensed water generated by the cooling heat exchanger is attached to the fixed portion, and    wherein the portion of the grommet nearer to the cylindrical seal portion than the fixed portion is formed with a weather-board for catching and removing the condensed water drops due to its own weight.    
   
   
       8 . An air-conditioning unit according to  claim 1 , 
 wherein the bellows is formed as a circle when viewed in axial direction of the cylindrical grommet.    
   
   
       9 . An air-conditioning unit according to  claim 1 , 
 wherein the bellows is formed as a polygon when viewed in axial direction of the cylindrical grommet.    
   
   
       10 . An air-conditioning unit according to  claim 1 , 
 wherein the cross section of the bellows along the axial direction of the grommet is smoothly expanded in a curved form radially outward of the grommet.    
   
   
       11 . An air-conditioning unit according to  claim 1 , 
 wherein the cross section of the bellows along the axial direction of the cylindrical grommet is linearly expanded as a flat surface radially outward of the grommet.    
   
   
       12 . An air-conditioning unit according to  claim 1 , 
 wherein the cross section of the bellows along the axial direction of the cylindrical grommet is reduced to a narrowed root at the expansion making up the bellows.    
   
   
       13 . An air-conditioning unit according to  claim 1 , 
 wherein the cross section of the bellows along the axial direction of the cylindrical grommet is so configured that one side of the expansion making up the bellows in the axial direction of the grommet is a flat surface, and the other side of the expansion is a Z-shaped bend.    
   
   
       14 . An air-conditioning unit according to  claim 1 , 
 wherein the cross section of the bellows along the axial direction of the cylindrical grommet includes an expansion making up the bellows having a Z-shaped bend on both axial sides thereof.    
   
   
       15 . An air-conditioning unit according to  claim 1 , 
 wherein a plurality of the bellows are formed successively in the axial direction of the cylindrical grommet.    
   
   
       16 . An air-conditioning unit according to  claim 15 , 
 wherein the plurality of the bellows each have an independent annular form.    
   
   
       17 . An air-conditioning unit according to  claim 15 , 
 wherein the plurality of the bellows have a continuous spiral form.