Hot wind supplying apparatus for packaging product

Abstract

A hot wind supplying apparatus having high energy consumption efficiency for packaging a product by use of a heat shrink film, capable of promoting the economics of a packaging work, the hot air supplying apparatus including at least one hot wind unit configured to discharge hot wind to a packaging surface of the product, wherein the hot wind unit includes a body having a discharging hole, at least one blower fan configured to blow air to the discharging hole, at least one fan motor configured to drive the blower fan, a heater configured to heat air that is to be discharged from the discharging hole, and at least one recycling flow path configured to collect the air discharged from the discharging hole and to supply the air collected to an intake side of the blower fan.

What is claimed is: 
     
         1 . A hot wind supplying apparatus for packaging a product, the hot wind supplying apparatus comprising:
 at least one hot wind unit configured to discharge hot wind to a packaging surface of the product,   wherein the hot wind unit comprises:   a body having a discharging hole,   at least one blower fan configured to blow air to the discharging hole,   at least one fan motor configured to drive the blower fan,   a heater configured to heat air that is to be discharged from the discharging hole, and   at least one recycling flow path configured to collect the air discharged from the discharging hole and to supply the air collected to an intake side of the blower fan.   
     
     
         2 . The hot wind supplying apparatus of  claim 1 , wherein:
 the hot wind unit further comprises a guide member provided in a way to be disposed in between the packaging surface and the body in a case when the hot wind is discharged through the hot wind unit, so that the air discharged from the discharging hole is introduced to the recycling flow path.   
     
     
         3 . The hot wind supplying apparatus of  claim 1 , further comprising:
 a main frame configured to support the hot wind unit and provided therein with a space to accommodate the product, wherein the hot wind unit is disposed at each of four side surfaces of the main frame so as to surround four side surfaces of the product that is entered into the space.   
     
     
         4 . The hot wind supplying apparatus of  claim 3 , wherein:
 the hot wind unit is disposed in a way that the discharging hole faces toward the product that is entered into the space.   
     
     
         5 . The hot wind supplying apparatus of  claim 3 , further comprising:
 a horizontal transfer unit configured to move the hot wind unit forward/backward with respect to the product that is entered into the space.   
     
     
         6 . The hot wind supplying apparatus of  claim 5 , wherein:
 the horizontal transfer unit comprises a driving motor, and a ball screw configured to convert a rotary movement by the driving motor into a linear movement.   
     
     
         7 . The hot wind supplying apparatus of  claim 3 , further comprising:
 at least one elevation unit configured to vertically move the hot wind unit.   
     
     
         8 . The hot wind supplying apparatus of  claim 3 , further comprising:
 a reflection member configured to provide a reflection surface for an idling of the hot wind unit, so that the hot wind discharged from the discharging hole faces is directed to the recycling flow path.   
     
     
         9 . The hot wind supplying apparatus of  claim 8 , wherein:
 the reflection member comprises heat insulation material.   
     
     
         10 . The hot wind supplying apparatus of  claim 8 , wherein:
 the reflection member is provided with a plurality of reflection surfaces to correspond to each hot wind unit.   
     
     
         11 . The hot wind supplying apparatus of  claim 1 , wherein:
 the hot wind unit further comprises a temperature sensor configured to measure the temperature of air being introduced to the blower fan.   
     
     
         12 . The hot wind supplying apparatus of  claim 1 , wherein:
 the hot wind unit further comprises a temperature sensor configured to measure the temperature of air passed through the heater.   
     
     
         13 . The hot wind supplying apparatus of  claim 3 , further comprising:
 a product transfer unit disposed at a lower portion of the main frame to transfer the product.   
     
     
         14 . A hot wind supplying apparatus for heat shrinking packaging a product comprising:
 a frame;   a conveyor unit to move the product into and out of the frame;   at least four hot wind units, wherein at least one unit is mounted on each side of the frame;   wherein the hot wind units are able to move in both a horizontal and vertical manner allowing the hot wind units to contact the product as the hot wind is being applied; and   wherein the hot wind units each comprise a guide unit that contacts the products and creates a closed void space between the hot wind ext and the product that allows to hot air to be circulated back into the hot wind unit.   
     
     
         15 . The hot wind supplying apparatus of  claim 14 , wherein the heat wing unit further comprises:
 a body having a discharging hole,   at least one blower fan configured to blow air to the discharging hole,   at least one fan motor configured to drive the blower fan,   a heater configured to heat air that is to be discharged from the discharging hole, and   at least one recycling flow path configured to collect the air discharged from the discharging hole and to supply the air collected to an intake side of the blower fan.   
     
     
         16 . The hot wind supplying apparatus of  claim 14 , wherein the heat wing units can be moved simultaneously or individually. 
     
     
         17 . The hot wind supplying apparatus of  claim 14 , further comprising:
 a reflection member configured to provide a reflection surface for an idling of the hot wind unit, so that the hot wind discharged from the discharging hole faces is directed to the recycling flow path.   
     
     
         18 . The hot wind supplying apparatus of  claim 17 , wherein:
 the reflection member comprises heat insulation material.   
     
     
         19 . The hot wind supplying apparatus of  claim 17 , wherein:
 the reflection member is provided with a plurality of reflection surfaces to correspond to each hot wind unit.   
     
     
         20 . The hot wind supplying apparatus of  claim 14 , wherein:
 the hot wind unit further comprises a temperature sensor configured to measure the temperature of air being introduced to the blower fan.