CN210769548U - Oil heater with temperature control function - Google Patents

Abstract

The utility model belongs to the technical field of heater temperature control, concretely relates to oil heater with temperature control function, including three phase current, heater, transformer, first miniature circuit breaker, the miniature circuit breaker of second, the miniature circuit breaker of third, contactor, auxiliary relay, digital temperature controller, power indicator, operation pilot lamp and stop indicator. The oil heater is additionally provided with the digital temperature controller, so that the working state of the heater can be automatically switched according to the set temperature, and the automatic temperature adjustment can be realized; the conversion between the 380V working power supply of the heater and the 220V power supply of the temperature controller can be realized. The utility model discloses can guarantee the heater normal operating when the temperature is very low.

Description

Oil heater with temperature control function

Technical Field

The utility model belongs to the technical field of heater temperature control, concretely relates to oil heater with temperature control function.

Background

The continuous reforming device is used for heating oil in the fan equipment. Because equipment components and parts are ageing, after the device operation several years, receive the influence of air humidity to make the inside mechanism of adjusting the temperature of fan damage, can not continue to use this oil heater to heat. The actuating mechanism for adjusting the temperature is damaged and cannot be used, and when the oil temperature is too low to start the equipment, the gear of the equipment is damaged, so that the continuous operation of the device is influenced.

The temperature control system of the old oil heater is realized by a temperature control switch, the temperature control switch is arranged in an explosion-proof box, the setting is very inconvenient, the set temperature and the actual temperature cannot be seen visually, and the temperature adjusting precision of the temperature control switch is not high enough. After the oil heater is damaged, in order to compensate for the abnormal heating of the oil heater, when the equipment is started at low temperature, an operator must heat the equipment by using steam to ensure that the equipment reaches the minimum oil temperature required by the operation of the equipment.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides an oil heater with temperature control function to solve and how to carry out temperature control's technical problem to oil heater.

(II) technical scheme

In order to solve the technical problem, the utility model provides an oil heater with temperature control function, this oil heater includes three-phase power, heater, transformer, first miniature circuit breaker, second miniature circuit breaker, third miniature circuit breaker, contactor, auxiliary relay, digital temperature controller, power indicator, operation pilot lamp and stop indicator;

the first miniature circuit breaker serving as a main power supply is connected with a three-phase power supply; the heater is connected with the first miniature circuit breaker through a contactor; the third miniature circuit breaker as the control power supply of the whole control loop is connected with two phases of the three-phase power supply; the second miniature circuit breaker serving as a transformer control power supply is connected with the third miniature circuit breaker; the inlet end of the transformer is connected with the second miniature circuit breaker, and the transformer is used for realizing the conversion between a 380V power supply of the heater and a 220V power supply of the digital temperature controller; the transformer outlet end is connected with the digital temperature controller and the intermediate relay which are connected in parallel, and a normally open contact of the digital temperature controller is connected between the transformer and the intermediate relay; a temperature sensor of the digital temperature controller is connected to the oil pool; a power indicator, an operation indicator and an outage indicator are connected in parallel between the third miniature circuit breaker and the second miniature circuit breaker; a normally open contact of an intermediate relay is connected between the third miniature circuit breaker and the contactor, and a wire outlet end of the contactor is connected with a wire outlet end of the power indicator lamp; the normally open contact of contactor has been connect between third miniature circuit breaker and the operation pilot lamp, has connect the normally closed contact of contactor between third miniature circuit breaker and the stop operation pilot lamp.

(III) advantageous effects

The oil heater with the temperature control function provided by the utility model is additionally provided with the digital temperature controller, and can realize automatic temperature adjustment by automatically switching the working state of the heater according to the set temperature; the conversion between the 380V working power supply of the heater and the 220V power supply of the temperature controller can be realized. The utility model discloses can guarantee the heater normal operating when the temperature is very low.

Drawings

Fig. 1 is a schematic diagram of an oil heater according to an embodiment of the present invention.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following description will make a detailed description of embodiments of the present invention with reference to the accompanying drawings and examples.

The present embodiment proposes an oil heater having a temperature control function, and as shown in fig. 1, the oil heater includes three-phase power supplies L1, L2, L3, a heater, a transformer, a first miniature circuit breaker QF1, a second miniature circuit breaker QF2, a third miniature circuit breaker QF3, a contactor KM, an intermediate relay KA, a digital temperature controller BT, a power indicator HR1, an operation indicator HR2, and a shutdown indicator HG.

Wherein, the 3P first miniature circuit breaker QF1 as the main power supply is connected with three-phase power supplies L1, L2 and L3; the heater is connected with a first miniature circuit breaker QF1 through a contactor KM; the 2P third miniature circuit breaker QF3 as the control power supply of the whole control loop is connected with two phases L1 and L2 of three-phase power supplies L1, L2 and L3; the 2P second miniature circuit breaker QF2 as a transformer control power supply is connected with the third miniature circuit breaker QF 3; the inlet end of the transformer is connected with a second miniature circuit breaker QF2, and the transformer is used for realizing the conversion between a 380V power supply of the heater and a power supply of a digital temperature controller BT 220V; the outlet end of the transformer is connected with a digital temperature controller BT and an intermediate relay KA which are connected in parallel, and a normally open contact of the digital temperature controller BT is connected between the transformer and the intermediate relay KA; a temperature sensor of the digital temperature controller BT is connected to the oil pool; a power indicator lamp HR1, an operation indicator lamp HR2 and a shutdown indicator lamp HG are connected between the third miniature circuit breaker QF3 and the second miniature circuit breaker QF2 in parallel; a normally open contact of an intermediate relay KA is connected between the third miniature circuit breaker QF3 and the contactor KM, and the outlet end of the contactor KM is connected with the outlet end of a power indicator HR 1; a normally open contact of the contactor KM is connected between the third miniature circuit breaker QF3 and the operation indicator lamp HR2, and a normally closed contact of the contactor KM is connected between the third miniature circuit breaker QF3 and the shutdown indicator lamp HG.

The first miniature circuit breaker QF1, the second miniature circuit breaker QF2 and the third miniature circuit breaker QF3 are switched on, at the moment, the power supply indicator lamp HR1 is bright, the outage indicator lamp HG is bright, the digital temperature controller BT is electrified, and the display screen is bright. The temperature of the temperature controller BT is set to be 27 ℃, when the temperature of the temperature sensor BT is lower than 27 ℃, the normally open contact of the temperature controller BT is closed, the coil of the intermediate relay KA is electrified, the normally open contact of the intermediate relay KA is closed, the coil of the contactor KM is electrified, the normally open contact of the contactor KM is closed, the operation indicator lamp HR2 is on, the normally closed contact of the contactor KM is disconnected, the shutdown indicator lamp HG is turned off, and the heater starts to operate. When the temperature of the temperature sensor BT reaches over 27 ℃, the temperature controller BT can automatically disconnect a normally open contact, the coil of the intermediate relay KA loses power, the auxiliary contact of the intermediate relay KA is disconnected, the coil of the contactor KM loses power, the original closed auxiliary contact of the contactor KM is disconnected, the original disconnected auxiliary contact is closed, the heater loses power and stops running, and the outage indicator lamp HG is on.

Compared with the original design, the temperature controller solves the problems that the oil heater cannot realize automatic control in the face of large temperature difference in four seasons, morning and evening and the like, ensures constant and stable temperature of the oil tank, and has certain economic effect in the aspect of energy conservation.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims (1)

1. An oil heater with a temperature control function is characterized by comprising a three-phase power supply, a heater, a transformer, a first miniature circuit breaker, a second miniature circuit breaker, a third miniature circuit breaker, a contactor, an intermediate relay, a digital temperature controller, a power supply indicator lamp, an operation indicator lamp and an outage indicator lamp;

the first miniature circuit breaker serving as a main power supply is connected with a three-phase power supply; the heater is connected with the first miniature circuit breaker through a contactor; the third miniature circuit breaker as the control power supply of the whole control loop is connected with two phases of the three-phase power supply; the second miniature circuit breaker serving as a transformer control power supply is connected with the third miniature circuit breaker; the inlet end of the transformer is connected with the second miniature circuit breaker, and the transformer is used for realizing the conversion between a 380V power supply of the heater and a 220V power supply of the digital temperature controller; the transformer outlet end is connected with the digital temperature controller and the intermediate relay which are connected in parallel, and a normally open contact of the digital temperature controller is connected between the transformer and the intermediate relay; a temperature sensor of the digital temperature controller is connected to the oil pool; a power indicator, an operation indicator and an outage indicator are connected in parallel between the third miniature circuit breaker and the second miniature circuit breaker; a normally open contact of an intermediate relay is connected between the third miniature circuit breaker and the contactor, and a wire outlet end of the contactor is connected with a wire outlet end of the power indicator lamp; the normally open contact of contactor has been connect between third miniature circuit breaker and the operation pilot lamp, has connect the normally closed contact of contactor between third miniature circuit breaker and the stop operation pilot lamp.

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