CN214281348U - Three-phase alternating current heater - Google Patents

Three-phase alternating current heater Download PDF

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Publication number
CN214281348U
CN214281348U CN202120563431.4U CN202120563431U CN214281348U CN 214281348 U CN214281348 U CN 214281348U CN 202120563431 U CN202120563431 U CN 202120563431U CN 214281348 U CN214281348 U CN 214281348U
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China
Prior art keywords
alternating current
temperature
fan
temperature control
control switch
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Active
Application number
CN202120563431.4U
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Chinese (zh)
Inventor
孔肖宾
赵佳
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Yongji Kairui Electric Co ltd
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Yongji Kairui Electric Co ltd
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Priority to CN202120563431.4U priority Critical patent/CN214281348U/en
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Abstract

The utility model discloses a three-phase alternating current heater, which comprises a terminal, an alternating current contactor KM1, a heating pipe, a temperature control switch I, a temperature control switch II, a temperature controller, an intermediate relay KM2 and a fan; the terminal, the alternating current contactor KM1 and the heating pipe are connected in series; an intermediate relay KM2 and a fan are connected between the terminal and the alternating current contactor KM1 in parallel; a temperature control switch, a temperature control switch and a temperature controller are also connected in parallel between the alternating current contactor KM1 and the intermediate relay KM 2. The utility model discloses a just need not change the voltage among the circuit loop, also need not unnecessary control circuit and unnecessary wiring, heater cost is lower relatively, and has stable performance, precision height, small, light in weight, reliability height, longe-lived, characteristics such as little to radio interference.

Description

Three-phase alternating current heater
Technical Field
The utility model discloses a three-phase alternating current heater relates to electrical equipment auxiliary control technical field.
Background
In the conventional three-phase alternating current heater, a 380V to 75V transformer is mostly used, and the single-phase current value is low after voltage regulation, so that the air volume of a corresponding fan is small. In the prior art, a single-phase alternating current fan is generally used for heat dissipation, so that the problems of insufficient fan air quantity, small heater air quantity and slow heat dissipation of a heating pipe generally exist. Because the output voltage of the heater is three-phase alternating current, the conventional modification strategy needs to change the voltage, and a control loop or wiring is added, so that the manufacturing cost of the heater is increased.
In addition, the existing three-phase AC heater controls the fan more by using the fan control temperature sensing switch, which has the disadvantages of lower performance stability, insufficient precision, larger volume and weight, low reliability, short service life, easy radio infection and the like
No effective solution has been found in the prior art to the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the three-phase alternating current heater is provided aiming at the defects of the prior art, and the intermediate relay, the three-phase alternating current fan and the temperature control switch are used for replacing and transforming the prior art.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a three-phase alternating current heater comprises a terminal, an alternating current contactor KM1, a heating pipe, a temperature control switch I, a temperature control switch II, a temperature controller, an intermediate relay KM2 and a fan, wherein: the terminal, the alternating current contactor KM1 and the heating pipe are connected in series; an intermediate relay KM2 and a fan are connected between the terminal and the alternating current contactor KM1 in parallel; a temperature control switch I, a temperature control switch II and a temperature controller are also connected in parallel between the alternating current contactor KM1 and the intermediate relay KM 2.
As a further preferred scheme of the utility model, the fan is high-power three-phase AC variable frequency fan.
As a further preferred scheme of the utility model, temperature detect switch I and temperature detect switch II are KSD301 temperature detect switch. The KSD301 temperature control switch is a temperature control switch with a bimetallic strip as a temperature sensing component; when the heating pipe normally works, the bimetallic strip is in a free state, and the contact is in a closed/open state; when the temperature reaches the action temperature, the bimetallic strip is heated to generate internal stress to act rapidly, so that the contact is opened/closed, and the circuit is cut off/closed.
As a further preferable scheme of the present invention, the intermediate relay KM2 is a 380V intermediate relay.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect: the utility model discloses a just need not change the voltage among the circuit loop, also need not unnecessary control circuit and unnecessary wiring, the heater cost is lower relatively. The device has the characteristics of stable performance, high precision, small volume, light weight, high reliability, long service life, small radio interference and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of the electric appliance of the present invention;
wherein: 1. terminal, 2, ac contactor KM1, 3, heating pipe, 4, temperature detect switch I, 5, temperature detect switch II, 6, temperature controller, 7, auxiliary relay KM2, 8, fan.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
The technical scheme of the utility model is further explained in detail with the attached drawings as follows:
the utility model discloses a schematic structure is shown in fig. 1, three-phase alternating current heater, including terminal, ac contactor KM1, heating pipe, temperature detect switch I, temperature detect switch II, temperature controller, auxiliary relay KM2 and fan, wherein: the terminal, the alternating current contactor KM1 and the heating pipe are connected in series; an intermediate relay KM2 and a fan are connected between the terminal and the alternating current contactor KM1 in parallel; a temperature control switch I, a temperature control switch II and a temperature controller are also connected in parallel between the alternating current contactor KM1 and the intermediate relay KM 2.
The utility model discloses an electrical apparatus schematic diagram is shown in fig. 2, the technical scheme of the utility model, change traditional 380V and use 380V auxiliary relay with 75V transformer, change three-phase alternating current fan with single-phase alternating current fan. The input of the heater is 380V three-phase alternating current, the current value is larger than the single-phase 75V current value after voltage regulation by the transformer, and the corresponding fan air volume is greatly different; the air quantity of the fan determines the air quantity of the heater and the heat dissipation speed of the heating pipe. The heater can be made perfect by selecting the advantages of high rated power of the three-phase alternating current fan, high rotating speed of the fan blades, large air exhaust amount and the like. In addition, because the output voltage of the heater is three-phase 380V alternating current, the fan also selects a high-power three-phase alternating current fan, and the corresponding middle bridging electric element also selects an alternating current relay with coil voltage of 380V, no voltage change, no redundant control circuit and redundant wiring are needed in the circuit loop, and the cost of the heater is relatively low.
Additionally, the utility model discloses in change common fan control temperature-sensitive switch for temperature detect switch. In one embodiment, a KSD301 temperature control switch is used, which is a temperature control switch using a bimetallic strip as a temperature sensing component, when the heating tube normally works, the bimetallic strip is in a free state, the contact is in a closed/open state, when the temperature reaches an action temperature, the bimetallic strip is heated to generate internal stress to rapidly act, the contact is opened/closed, and a circuit is cut off/connected, so that the temperature control effect is achieved. When the heating pipe is cooled to the reset temperature, the contact is automatically closed/opened, and the normal working state is recovered. Its advantages are stable performance, high precision, small size, light weight, high reliability, long service life and low interference to radio.
The heater is powered on, the heating pipe starts to work, and the fan is in a static state; when the surface temperature of the heating pipe is critical to the temperature controlled by the temperature controlled switch, the temperature controlled switch is closed, the fan rotates, and the effects of blowing air by the heater and cooling the heating pipe are met. Compared with the cooling temperature efficiency of the fan, the heating temperature efficiency of the heating pipe is far greater than the cooling temperature of the fan, so that the temperature control switch can be reset and disconnected only after being in a power-off state; the fan in the power-on state continues to rotate until the power is cut off.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment without departing from the technical scope of the present invention, but all the modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principle of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (5)

1. A three-phase ac heater, comprising: including terminal, ac contactor KM1, heating pipe, temperature detect switch I, temperature detect switch II, temperature controller, auxiliary relay KM2 and fan, wherein:
the terminal, the alternating current contactor KM1 and the heating pipe are connected in series;
an intermediate relay KM2 and a fan are connected between the terminal and the alternating current contactor KM1 in parallel;
a temperature control switch I, a temperature control switch II and a temperature controller are also connected in parallel between the alternating current contactor KM1 and the intermediate relay KM 2.
2. A three-phase ac heater according to claim 1, wherein: the fan is a high-power three-phase alternating current variable frequency fan.
3. A three-phase ac heater according to claim 1, wherein: the temperature control switch I and the temperature control switch II are both KSD301 temperature control switches.
4. A three-phase ac heater according to claim 1, wherein: the intermediate relay KM2 is a 380V intermediate relay.
5. A three-phase ac heater according to claim 3, wherein: the KSD301 temperature control switch is a temperature control switch with a bimetallic strip as a temperature sensing component;
when the heating pipe normally works, the bimetallic strip is in a free state, and the contact is in a closed/open state;
when the temperature reaches the action temperature, the bimetallic strip is heated to generate internal stress to act rapidly, so that the contact is opened/closed, and the circuit is cut off/closed.
CN202120563431.4U 2021-03-19 2021-03-19 Three-phase alternating current heater Active CN214281348U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120563431.4U CN214281348U (en) 2021-03-19 2021-03-19 Three-phase alternating current heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120563431.4U CN214281348U (en) 2021-03-19 2021-03-19 Three-phase alternating current heater

Publications (1)

Publication Number Publication Date
CN214281348U true CN214281348U (en) 2021-09-24

Family

ID=77798422

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120563431.4U Active CN214281348U (en) 2021-03-19 2021-03-19 Three-phase alternating current heater

Country Status (1)

Country Link
CN (1) CN214281348U (en)

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