CN219301007U

CN219301007U - Electric heating device for mixed use of alternating current and flexible direct current

Info

Publication number: CN219301007U
Application number: CN202223398847.9U
Authority: CN
Inventors: 白杨
Original assignee: Beijing Xinneng Leye Technology Co ltd; State Grid Ningxia Comprehensive Energy Service Co ltd
Current assignee: Beijing Xinneng Leye Technology Co ltd; State Grid Ningxia Comprehensive Energy Service Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-07-04
Anticipated expiration: 2032-12-16

Abstract

An electric heating device for mixing alternating current and flexible direct current is provided with a heating body, a first alternating current contactor, a second alternating current contactor, a direct current contactor and a control panel, wherein the first alternating current contactor and the second alternating current contactor are connected in an interlocking manner, at least one heating unit is arranged in the heating body, the heating unit comprises two heating wires which are connected in series, two ends of the heating unit are respectively connected to two main contacts of a load end of the first alternating current contactor and two main contacts of a load end of the second alternating current contactor, the other main contact of the load end of the first alternating current contactor is connected between the two heating wires of the heating unit through a wire, and the two main contacts of the load end of the direct current contactor corresponding to a direct current power supply are connected to the two main contacts of the inlet end of the second alternating current contactor corresponding to the heating unit.

Description

Electric heating device for mixed use of alternating current and flexible direct current

Technical Field

The utility model relates to the field of heating, in particular to an electric heating device for mixing alternating current and flexible direct current.

Background

The utilization of clean energy, especially the rapid increase of photovoltaic power generation, and the regional-building energy system source network charge storage becomes an advantageous approach for photovoltaic utilization, and a large amount of light storage flexible direct power supply and distribution technology and equipment are required. Under the condition that the system photovoltaic electricity is used for heating, the voltage of a main bus of the flexible direct current distribution equipment is generally DC750V, and in order to ensure heating, when the photovoltaic supply is insufficient, the electric heater also needs to be powered by using three-phase AC 380V. In order to adapt to two situations, the electric heater usually adopts two groups of heating components which are respectively connected to a DC power supply and an AC power supply to solve the problems, so that the volume is huge, the heat energy loss is increased, and the cost is also greatly increased; furthermore, a direct current 380V output can be arranged in the direct current flexible system, so that the requirement of a heater is met, the cost of the direct current flexible system is increased, and the reliability is reduced. Under the current state of the art, there is a need for a low cost heater device that can accommodate both power sources.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide an electric heating device for mixing alternating current and flexible direct current so as to solve the problems in the technical background.

The aim of the utility model is realized by the following technical scheme:

the utility model provides an electric heater unit that alternating current and flexible direct current mix was used, includes the electric heater unit body, be provided with the heating member in the electric heater unit body, still include first alternating current contactor, second alternating current contactor, direct current contactor and with first alternating current contactor, second alternating current contactor, direct current contactor electric connection's control panel, interlock is connected between first alternating current contactor and the second alternating current contactor, be equipped with at least one heating unit in the heating member, the heating unit includes two heating wires that establish ties, and the both ends of heating unit are connected respectively on two main contacts of first alternating current contactor and second alternating current contactor load end, and another main contact of first alternating current contactor load end passes through the wire and connects between two heating wires of heating unit, and first alternating current contactor inlet end's main contact is connected with alternating current power supply, and two main contacts that direct current contactor load end and direct current power supply correspond are electric connection on two main contacts that second alternating current contactor inlet end and heating unit correspond.

In the above summary, further, the outer wall of the electric heating device body includes a casing, an inner container, and an insulation layer disposed between the casing and the inner container.

In the above summary, further, the upper end of the electric heating device body is provided with a water outlet and a pressure relief opening, and the lower end of the electric heating device body is also provided with a water inlet and a sewage outlet.

In the above summary, further, the electric heating device body is provided with a mounting structure, and the heating body is fixedly mounted on the electric heating device body through the mounting structure.

In the above summary, further, the heating body includes a plurality of heating bodies, and three heating units are respectively disposed in the plurality of heating bodies.

In the above summary, further, the first ac contactor and the second ac contactor are interlocked by one or both of mechanical interlocking and electrical interlocking.

The beneficial effects of the utility model are as follows: the heating body of the utility model is applicable to both an alternating current power supply and a direct current flexible system, and does not need to be provided with special direct current voltage output for adapting to the heating body or provided with a plurality of groups of heating bodies for adapting to the voltage, thereby not only reducing the production cost, but also reducing the volume and the heat energy loss of the heater.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a block diagram showing the structure of a heating unit in a heating body according to the present utility model;

fig. 3 is a block diagram showing the structure of the heating unit in the heating body of the present utility model.

In the figure, 1-electric heating device body, 1.1-shell, 1.2-inner container, 1.3-heat preservation, 1.4-delivery port, 1.5-pressure relief port, 1.6-water inlet, 1.7-drain, 1.8-mounting structure, 2-heating body, 3-first AC contactor, 4-second AC contactor, 5-DC contactor, 6-control panel, 7-heating unit, 8-heating wire, 9-wire, 10-AC power supply, 11-DC power supply.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

Examples:

an electric heating device for mixing alternating current and flexible direct current is shown in the accompanying drawings 1-3, and comprises an electric heating device body 1, wherein the outer wall of the electric heating device body 1 comprises a shell 1.1, an inner container 1.2 and a heat insulation layer 1.3 arranged between the shell 1.1 and the inner container 1.2, the upper end of the electric heating device body 1 is respectively provided with a water outlet 1.4 and a pressure relief opening 1.5, the lower end of the electric heating device body 1 is also respectively provided with a water inlet 1.6 and a sewage outlet 1.7, a heating body 2 is arranged in the electric heating device body 1, a mounting structure 1.8 is arranged on the electric heating device body 1, the heating body 2 is fixedly mounted on the electric heating device body 1 through the mounting structure 1.8, more particularly, the electric heating device further comprises a first alternating current contactor 3, a second alternating current contactor 4, a direct current contactor 5 and a control panel 6 electrically connected with the first alternating current contactor 3, the second alternating current contactor 4 and the direct current contactor 5, in the embodiment, the first ac contactor 3 and the second ac contactor 4 are interlocked, specifically, in the embodiment, the first ac contactor and the second ac contactor 3 and 4 are mechanically interlocked, a heating unit 7 is arranged in the heating body 2, the heating unit comprises two heating wires 8 connected in series, two ends of the heating unit 7 are respectively connected to two main contacts at the load ends of the first ac contactor 3 and the second ac contactor 4, the other main contact at the load end of the first ac contactor 3 is connected between the two heating wires 8 of the heating unit 7 through a wire 9, the main contact at the inlet end of the first ac contactor 3 is connected with an ac power supply 10, the two main contacts at the inlet end of the dc contactor 5 are connected with a dc power supply 11, the two main contacts of the load end of the direct current contactor 5 corresponding to the direct current power supply 11 are electrically connected to the two main contacts of the inlet end of the second alternating current contactor 4 corresponding to the heating unit 7.

In the utility model, the first ac contactor 3 and the second ac contactor 4 are controlled to be opened and closed by the control panel 6, specifically, when the first ac contactor 3 is controlled to be closed, the second ac contactor 4 is in an opened state at the moment because the second ac contactor 4 is interlocked with the first ac contactor 3, the ac circuit is turned on at the moment, the dc circuit is in an opened state, the working power supply of the heating body 2 is an ac power supply 10, and during the heating process, two ends of two electric heating wires 8 of the heating unit 7 are respectively connected to two phases of the ac power supply 10, and the effective value of the working voltage of each electric heating wire 8 is 380V. When the direct current power supply 11 is needed to supply power to the electric heating device body 1, the control panel 6 is used for controlling the first alternating current contactor 3 to be disconnected, the alternating current loop is disconnected, the second alternating current contactor 4 is attracted after the time delay is 5 seconds, the direct current contactor 5 is attracted after the time delay is 5 seconds, the direct current loop is connected, the direct current power supply 11 starts to supply power to the electric heating device body 1, and because the two electric heating wires 8 of the heating unit 7 are connected in series, the working voltage of each electric heating wire 8 is 375V at the moment, and compared with the working voltage of the electric heating wire 380V when the alternating current power is supplied, the electric heating wires 8 operate in the normal working voltage fluctuation range. When the alternating current power supply 10 is needed to supply power to the electric heating device body 1 again, the control panel 6 controls the direct current contactor 5 to be disconnected, the second alternating current contactor 4 is disconnected after the time delay is 5 seconds, the direct current loop is disconnected, the first alternating current contactor 3 is attracted after the time delay is 5 seconds, the alternating current loop is connected, and the electric heating device body 1 enters an alternating current power supply state again.

It should be further explained in the above embodiments that a plurality of heating bodies 2 may be provided in the electric heating device body 1, and preferably, three heating units 7 are provided in each heating body 2, so that the heating bodies 2 ensure balance of three-phase operation voltages when ac power is supplied.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The utility model provides an electric heater unit that alternating current and flexible direct current mix was used, includes the electric heater unit body, be provided with the heating member in the electric heater unit body, its characterized in that still includes first alternating current contactor, second alternating current contactor, direct current contactor and with first alternating current contactor, second alternating current contactor, direct current contactor electric connection's control panel, interlock connection between first alternating current contactor and the second alternating current contactor, be equipped with at least one heating unit in the heating member, the heating unit includes two heating wires that establish ties, and the both ends of heating unit are connected respectively on two main contacts of first alternating current contactor and second alternating current contactor load end, and another main contact of first alternating current contactor load end passes through the wire and connects between two main contacts of heating unit, and the main contact of first alternating current contactor inlet end is connected with alternating current power, and two main contacts that direct current contactor load end and direct current power correspond are electric connection in two main contacts that the second alternating current contactor inlet end corresponds on the heating unit.

2. The electric heating device for mixed use of alternating current and flexible direct current according to claim 1, wherein the outer wall of the electric heating device body comprises a shell, an inner container and an insulating layer arranged between the shell and the inner container.

3. The electric heating device for mixed use of alternating current and flexible direct current according to claim 1, wherein the upper end of the electric heating device body is respectively provided with a water outlet and a pressure relief opening, and the lower end of the electric heating device body is also respectively provided with a water inlet and a sewage outlet.

4. The electric heating device for mixed use of alternating current and flexible direct current according to claim 1, wherein the electric heating device body is provided with a mounting structure, and the heating body is fixedly mounted on the electric heating device body through the mounting structure.

5. An electric heating device for mixed use of alternating current and flexible direct current according to claim 1, wherein the heating body comprises a plurality of heating bodies, and three heating units are respectively arranged in the plurality of heating bodies.

6. An ac and flexible dc hybrid electrical heating device as in claim 1 wherein the first ac contactor and the second ac contactor are interlocked by one or both of mechanical and electrical interlocking.