CN216814610U

CN216814610U - Industrial air heater

Info

Publication number: CN216814610U
Application number: CN202220325886.7U
Authority: CN
Inventors: 张国全
Original assignee: Zongyang Ding Ding Technology Co ltd
Current assignee: Zongyang Ding Ding Technology Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-06-24
Anticipated expiration: 2032-02-17

Abstract

The utility model provides an industrial air heater with high thermal efficiency, no fusing of an electric heating belt and long-term use, which comprises a heating chamber with an air inlet and an air outlet, wherein a high-temperature high-pressure centrifugal fan is communicated with the air outlet of the heating chamber; the heater is inserted into the heating chamber from the top of the heating chamber; the heater is an electric heater and comprises a positive electrode rod, a negative electrode rod and an electric heating element, wherein the electric heating element comprises an insulating ring and an electric heating belt arranged on the periphery of the insulating ring; the positive electrode rod and the negative electrode rod are both vertical, the lower part of the negative electrode rod is provided with an insulating lower baffle for supporting the electric heating element, and the negative electrode rod is not contacted with the insulating ring.

Description

Industrial air heater

Technical Field

The utility model relates to an industrial air heater.

Background

An industrial air heater is a device widely used in the fields of electronics, food, pharmacy, printing, packaging, cleaning, heat treatment and the like, and comprises an air blower, a heater and a control circuit. The heater is usually an electrothermal tube heater, which uses a metal tube (including a stainless steel tube, a copper tube, etc.) as a shell, spiral electrothermal alloy wires (nickel-chromium, iron-chromium alloy wires) are uniformly distributed along the central axis in the metal tube, a gap between the spiral electrothermal alloy wires is filled with magnesia sand with good insulation and heat conductivity, and two ports of the metal tube are sealed by silica gel. The industrial air heater has the defects that the electric heating alloy wire is positioned in the center of the inner part of the electric heating tube type heater, heat needs to be conducted through magnesia sand to exchange heat with air, and therefore the temperature rise of the air is limited. More importantly, the electric heating alloy wire is arranged inside, is easy to fuse and has higher failure rate.

SUMMERY OF THE UTILITY MODEL

The utility model provides an industrial air heater which has high heat efficiency, can not fuse an electric heating belt, can be used for a long time and has higher air outlet temperature.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the industrial air heater comprises a heating chamber with an air inlet and an air outlet, wherein a high-temperature centrifugal fan is communicated with the air outlet of the heating chamber; the heater is inserted into the heating chamber from the top of the heating chamber; the heater is an electric heater and comprises a positive electrode rod, a negative electrode rod and an electric heating element, wherein the electric heating element comprises an insulating ring and an electric heating belt arranged on the periphery of the insulating ring; the positive electrode rod and the negative electrode rod are both vertical, the lower part of the negative electrode rod is provided with an insulating lower baffle for supporting the electric heating element, and the negative electrode rod is not contacted with the insulating ring.

In the industrial air heater, the upper end surface of the lower baffle is in contact with the lower end surface of the electric heating element to block the inner hole of the insulating ring.

The industrial air heater is provided with a plurality of pairs of positive electrode rods and negative electrode rods, and the distances between the electric heating elements on two adjacent negative electrode rods in the radial direction are the same.

In the industrial air heater, the air inlet is communicated with the air return chamber, and the air return chamber is communicated with the heating chamber through a partition plate with an opening.

In the industrial air heater, the top wall outside the heating chamber is provided with the protective cover, and the positive electrode rod and the negative electrode rod are positioned in the protective cover.

The utility model has the beneficial effects that: the electric heat tape is located electric heating element's periphery, can fully carry out the heat exchange with the air contact, and calorific loss is little, and the air intensifies more, and the electric heat tape is in the great periphery of diameter simultaneously, and curvature radius is great, and difficult rupture also can not produce local overheat phenomenon during the circular telegram and lead to fusing. The negative electrode rod is positioned in the insulating ring and is not contacted with the insulating ring, so that the over-high temperature of the negative electrode rod is avoided. The lower baffle blocks the inner hole of the insulating ring, so that excessive heat is prevented from entering the inside of the insulating ring to be dissipated or heating the negative electrode rod. The heat treatment chamber is communicated with the air outlet, so that high-temperature gas coming out of the heating chamber is uniformly stirred by the high-temperature centrifugal fan, and the uniformity of the outlet air temperature is ensured.

Drawings

Fig. 1 is a main view of an industrial hot air blower.

Fig. 2 is a top view of an industrial air heater.

Fig. 3 is a side view of an industrial air heater.

In the figure: the device comprises a shell 1, a heating chamber 2, a heating chamber air outlet 21, a partition plate 3, an air return chamber 4, an air inlet 41, a high-temperature centrifugal fan 5, a negative electrode rod 6, an electric heating element 7, an electric heating belt 71, an insulating ring 72, a positive electrode rod 8, a shield 9, a lower baffle 10 and an upper baffle 11.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1-3, the industrial air heater has a heating chamber 2 and an air return chamber separated by an open partition 3 in a housing 1, and an inlet of a blower 5 is communicated with an air outlet 21 of the heating chamber; the air inlet 41 is communicated with the air return chamber. The electric heater comprises a plurality of vertical pairs of negative and positive electrode rods 6, 8 fixed to the housing wall and an electric heating element 7. The outer wall of the shell is provided with a shield 9, and the positive electrode rod and the negative electrode rod are positioned in the shield.

The outer circumference of the electric heating element 7 is a heating wire 71 and the inside is an insulating ring 72. The negative electrode rod 6 penetrates through the shell wall and extends into the heating chamber, the insulating ring 72 penetrates and is sleeved on the negative electrode rod in the heating chamber, and the negative electrode rod is not in contact with the insulating ring. An insulating lower baffle plate 10 for supporting the electric heating element is arranged at the lower part of the negative electrode rod, and the upper end surface of the lower baffle plate 10 is contacted with the lower end surface of the electric heating element 7 to block the inner hole of the insulating ring. An insulating upper baffle 11 is arranged on the upper part of the negative electrode rod, and the electric heating element 7 is positioned between the upper baffle 11 and the lower baffle 10. The electric heating elements 7 on two adjacent negative electrode rods 6 have the same pitch in the radial direction.

The lower end of the negative electrode rod 6 is electrically connected with the electric heating tape in the electric heating element 7 positioned at the lowest end of the negative electrode rod through a lead, and the electric heating tape in the electric heating element 7 positioned at the highest end of the negative electrode rod is electrically connected with the positive electrode rod 8 through a lead.

Claims

1. The industrial air heater comprises a heating chamber with an air inlet and an air outlet, and a high-temperature centrifugal fan is communicated with the air outlet of the heating chamber; the method is characterized in that: the heater is inserted into the heating chamber from the top of the heating chamber;

the heater is an electric heater and comprises a positive electrode rod, a negative electrode rod and an electric heating element, wherein the electric heating element comprises an insulating ring and an electric heating belt arranged on the periphery of the insulating ring; the positive electrode rod and the negative electrode rod are both vertical, the lower part of the negative electrode rod is provided with an insulating lower baffle for supporting the electric heating element, and the negative electrode rod is not in contact with the insulating ring.

2. The industrial air heater of claim 1, wherein the upper end surface of the lower baffle is in contact with the lower end surface of the electric heating element to block the inner hole of the insulating ring.

3. The industrial heat blower of claim 1, wherein there are a plurality of pairs of positive electrode rods and negative electrode rods, and the electric heating elements on two adjacent negative electrode rods are equally spaced in the radial direction.

4. The industrial air heater of claim 1, wherein the air inlet communicates with an air return chamber, the air return chamber communicating with the heating chamber through an apertured partition.

5. The industrial air heater of claim 1, wherein a shield is disposed on the top wall of the heating chamber, and the positive electrode rod and the negative electrode rod are disposed in the shield.