Heater

Abstract

Disclosed is a heater including a housing assembly and a heating assembly. The housing assembly includes installation housings nested with each other in sequence, to make the housing assembly retractable, when the housing assembly is extended, interiors of the plurality of housing assemblies communicate with each other to form a heat dissipation channel, the installation housing located at a bottom of the housing assembly is provided with an air inlet, and the installation housing located at a top of the housing assembly is provided with a heat dissipation port; and the heating assembly provided inside the heat dissipation channel.

What is claimed is: 
     
         1 . A heater, comprising:
 a housing assembly comprising at least two installation housings nested with each other to make the housing assembly retractable, wherein when the housing assembly is extended, interiors of the housing assemblies communicate with each other to form a heat dissipation channel, the installation housing located at a bottom of the housing assembly is provided with an air inlet, and the installation housing located at a top of the housing assembly is provided with a heat dissipation port; and   a heating assembly provided inside the heat dissipation channel.   
     
     
         2 . The heater of  claim 1 , wherein the heating assembly is provided around a circumference of the heat dissipation channel. 
     
     
         3 . The heater of  claim 2 , wherein the heating assembly is a heating wire provided around the circumference of the heat dissipation channel. 
     
     
         4 . The heater of  claim 2 , wherein the heating assembly comprises a heating tube provided around the circumference of the heat dissipation channel. 
     
     
         5 . The heater of  claim 4 , wherein the heating assembly further comprises a plurality of heat dissipation plates sequentially sleeved on the heating tube along the circumference of the heat dissipation channel. 
     
     
         6 . The heater of  claim 5 , wherein a surface of the heat dissipation plate is parallel to a length direction of the heat dissipation channel. 
     
     
         7 . The heater of  claim 1 , wherein:
 the heater further comprises a bracket, the bracket is horizontally provided inside the installation housing located at the bottom of the housing assembly to divide an inner space of the housing assembly into a heat dissipation channel and an air intake space distributed up and down, and the bracket is provided with a ventilation hole communicating with the air intake space and the heat dissipation channel; and   the air inlet communicates with the air intake space, and the heating assembly is provided inside the heat dissipation channel.   
     
     
         8 . The heater of  claim 7 , wherein the bracket is provided with a support assembly extending upwards along a height direction of the housing assembly, and the heating assembly is supported by the support assembly. 
     
     
         9 . The heater of  claim 1 , wherein:
 the air inlet is provided on a side wall of the installation housing to form a side air inlet; and   the heater comprises a plurality of side air inlets distributed at intervals along a circumference of the installation housing.   
     
     
         10 . The heater of  claim 9 , wherein the installation housing is provided with at least two rows of side air inlets along a height direction of the installation housing, each row of side air inlets comprises the plurality of side air inlets distributed at intervals along the circumference of the installation housing, and two adjacent rows of side air inlets are staggered. 
     
     
         11 . The heater of  claim 1 , wherein the installation housing is a cylindrical body with two ends communicated with each other, the heat dissipation port is formed at a top opening of the installation housing located at the top of the housing assembly, and the air inlet is formed at a bottom opening of the installation housing located at the bottom of the housing assembly, wherein:
 the housing assembly further comprises a top grid cover for covering the heat dissipation port; and/or   the housing assembly further comprises a bottom grid cover for covering the air inlet.   
     
     
         12 . The heater of  claim 1 , wherein:
 the two installation housings nested with each other are respectively a first installation housing and a second installation housing, and the second installation housing is provided inside the first installation housing; and   a guiding rail is provided between the first installation housing and the second installation housing, the guiding rail extends along a height direction of the first installation housing, and the second installation housing slides along the guiding rail to pass in and out from the top opening of the first installation housing to the first installation housing.   
     
     
         13 . The heater of  claim 12 , wherein a limiting portion protrudes from a top inner wall of the first installation housing, a stopper portion protrudes from a bottom outer wall of the second installation housing, and the stopper portion is opposite to the limiting portion,
 wherein a guiding groove is formed at the stopper portion, and the guiding rail is provided inside the guiding groove,   wherein the housing assembly further comprises a locking and releasing structure provided between the first installation housing and the second installation housing to lock the second installation housing and prevent the second installation housing from falling back when the second installation housing is extended, wherein:   the locking and releasing structure is a support pad provided at a top of the guiding rail, and the second installation housing is configured to rotate relative to the first installation housing; and   when the second installation housing is extended in place, the second installation housing rotates relative to the first installation housing to allow the support pad to support the stopper portion outside the guiding groove, wherein:   a surface of the support pad away from the guiding rail is provided with a limiting groove, and a positioning portion protrudes from a lower surface of the stopper portion;   when the stopper portion is supported by the support pad, the positioning portion is provided in the limiting groove; and/or   a blocking portion protrudes from the surface of the support pad away from the guiding rail to limit a rotation angle of the second installation housing.   
     
     
         14 . The heater of  claim 13 , wherein:
 the locking and releasing structure comprises a first elastic protrusion and a clamping hole;   the first elastic protrusion and the clamping hole are respectively provided at the guiding rail and a surface opposite to the guiding rail; and   when the second installation housing is extended in place, the first elastic protrusion is inserted into the clamping hole to lock the second installation housing, wherein:   the locking and releasing structure further comprises a second elastic protrusion, the second elastic protrusion and the first elastic protrusion are distributed at intervals along a height direction of the guiding rail; and   when the second installation housing is stored in the first installation housing, the second elastic protrusion is inserted into the clamping hole to lock the second installation housing.   
     
     
         15 . The heater of  claim 13 , wherein:
 the locking and releasing structure comprises an elastic arm provided at a surface of the guiding rail, and the elastic arm extends upward along a vertical direction; and   when the second installation housing is extended in place, a free end of the elastic arm supports the second installation housing to prevent the second installation housing from falling back.   
     
     
         16 . The heater of  claim 14 , wherein:
 a limiting protrusion protrudes from a free end of an elastic arm towards the second installation housing, a guiding slope is formed at a lower surface of the limiting protrusion; and   when the second installation housing is extended, the second installation housing moves along the guiding slope to make the elastic arm retract until the second installation housing passes the elastic arm and is supported by the free end of the elastic arm.   
     
     
         17 . The heater of  claim 13 , wherein the housing assembly further comprises a protective pad for covering an edge of the guiding groove. 
     
     
         18 . The heater of  claim 13 , wherein the housing assembly further comprises a guiding rail cushion pad provided at an end of the guiding rail. 
     
     
         19 . The heater of  claim 18 , wherein an insertion hole protrudes from the end of the guiding rail, an insertion portion protrudes from a side of the guiding rail cushion pad towards the guiding rail, and the insertion portion is inserted into the insertion hole, wherein the insertion portion is provided with a hook, a clamping port is formed at a hole wall of the insertion hole, and the hook is hooked in the clamping port. 
     
     
         20 . The heater of  claim 1 , wherein:
 the heater is further provided with a control switch provided on an outer wall of the installation housing located at the bottom of the housing assembly and is electrically connected to the heater assembly; and/or   the heater further comprises an air supply assembly provided inside the installation housing located at the bottom of the housing assembly, to make hot air in the heat dissipation channel blown out from the heat dissipation port, and allow outside air to enter the heat dissipation channel from the air inlet for gas circulation.