阅读说明：本技术 一种电储热装置 (Electric heat storage device ) 是由 刘勇 于 2020-05-07 设计创作，主要内容包括：一种电储热装置(10)包括电加热单元(1)、储热单元(2)、换热单元(3)、风机(4)和风道(5)。电加热单元、储热单元、换热单元和风机依次串接在风道上组成一个封闭的循环系统。电加热单元设在储热单元内部,风机靠近储热单元设置,储热单元通过风道与换热单元连接。电加热单元包括均匀布设的一个或多个电热阻棒(6)；换热单元包括换热器(7),优选为管壳式换热器；风机可为轴流风机。由于电热阻棒均匀布设在电加热单元中,使得储热单元受热均匀,储热效果好,热损失少。通过加大风机的排风量,可以提高换热效率,从而实现高换热效率。该电储热装置,不仅储热效果好,热损失少,而且换热效率高。(An electric heat storage device (10) comprises an electric heating unit (1), a heat storage unit (2), a heat exchange unit (3), a fan (4) and an air duct (5). The electric heating unit, the heat storage unit, the heat exchange unit and the fan are sequentially connected in series on the air duct to form a closed circulating system. The electric heating unit is arranged inside the heat storage unit, the fan is arranged close to the heat storage unit, and the heat storage unit is connected with the heat exchange unit through an air duct. The electric heating unit comprises one or more electric resistance rods (6) which are uniformly distributed; the heat exchange unit comprises a heat exchanger (7), preferably a shell-and-tube heat exchanger; the fan may be an axial fan. Because the electric heating resistance rods are uniformly distributed in the electric heating unit, the heat storage unit is uniformly heated, the heat storage effect is good, and the heat loss is less. Through increasing the volume of airing exhaust of fan, can improve heat exchange efficiency to realize high heat exchange efficiency. The electric heat storage device has the advantages of good heat storage effect, less heat loss and high heat exchange efficiency.)

1. An electrical heat storage device, characterized in that: the electric heat storage device (10) comprises an electric heating unit (1), a heat storage unit (2), a heat exchange unit (3), a fan (4) and a corresponding air duct (5); the electric heating unit (1), the heat storage unit (2), the fan (4) and the heat exchange unit (3) are sequentially connected in series on the air duct (5) to form a closed circulating system; and, establish electrical heating unit (1) inside heat-retaining unit (2), fan (4) are close to heat-retaining unit (2) set up, heat-retaining unit (2) pass through wind channel (5) with heat transfer unit (3) are connected.

2. An electrical heat storage device according to claim 1, characterized in that: the heat storage unit (2) is made of solid heat storage materials, and the maximum heat storage temperature reaches 600 ℃ and 800 ℃.

3. An electrical heat storage apparatus according to claim 1 or 2, characterized in that: the electric heating unit (1) comprises one or more electric heating resistance rods (6), and the electric heating resistance rods (6) are uniformly distributed in the electric heating unit (1).

4. An electrical heat storage apparatus according to claim 1, 2 or 3, characterized in that: the heat exchange unit (3) comprises a heat exchanger (7).

5. An electrical heat storage device according to claim 4, characterized in that: the heat exchanger (7) is a shell-and-tube heat exchanger.

6. An electrical heat storage apparatus according to any one of claims 1 to 5, characterized in that: the fan (4) is an axial flow fan.

7. An electrical heat storage apparatus according to any one of claims 1 to 6, characterized in that: one or more of the electric heating unit (1), the heat storage unit (2), the heat exchange unit (3) and the fan (4) are provided with a plurality of heat exchangers.

Technical Field

The invention relates to the technical field of electric heat storage, in particular to an electric heat storage device.

Background

The problems of increasingly worsening global environment, gradually warming climate, resource exhaustion and the like are very serious, and the method directly poses serious threats to the survival and development of human beings. Therefore, the development of low-carbon economy has become a new development trend and urgent need in the world today. The core of low-carbon economic development is to improve the energy structure and develop and utilize new energy. The improvement of the energy structure and the realization of the marketization of new energy are the key points. Only when the new energy in the future is marketed and is in price balance with the conventional energy, the consumption of non-renewable resources can be reduced and avoided.

Therefore, the electric heat storage device is a special device different from the traditional heat storage electric boiler and can replace the coal-fired, gas-fired and oil-fired boilers widely used at present. The electric heat storage device combines an electric heating system, a heat storage system and a heat exchange system together. The heat storage material is solid material, and the heat storage capacity is several times of that of common water. In the using process, no waste gas, waste water and waste residue are generated, and the heat-supply device is an environment-friendly upgrading product in the heat-supply field.

However, the existing electric heat storage device has the disadvantages of unobvious heat storage effect, large heat loss and low operation efficiency, is difficult to adapt to the modern energy-saving and consumption-reducing times in the world, and is difficult to meet the requirements of users.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the electric heat storage device with obvious heat storage effect, small heat loss and high operation efficiency.

The invention provides an electric heat storage device which comprises an electric heating unit, a heat storage unit, a heat exchange unit, a fan and a corresponding air duct. The electric heating unit, the heat storage unit, the fan and the heat exchange unit are sequentially connected in series on the air duct to form a closed circulating system; and the electric heating unit is arranged in the heat storage unit, the fan is close to the heat storage unit, and the heat storage unit is connected with the heat exchange unit through the air channel.

Further, the electric heating unit comprises one or more electric resistance rods; preferably, the electric heating resistance rods are uniformly distributed in the electric heating unit.

Furthermore, the heat storage unit is made of solid heat storage materials, and the maximum heat storage temperature reaches 600 ℃ and 800 ℃.

Further, the heat exchange unit comprises a heat exchanger; preferably, the heat exchanger is a shell-and-tube heat exchanger.

Preferably, the fan is an axial fan.

Further, one or more of the electric heating unit, the heat storage unit, the heat exchange unit and the fan can be provided with a plurality of.

According to the electric heat storage device, the electric heating resistance rods are uniformly distributed in the electric heating unit, so that the heat storage unit is uniformly heated, the heat storage effect is good, and the heat loss is less. And, the more the fan volume of airing exhaust is, the higher the heat exchange efficiency is. Through increasing the volume of airing exhaust of fan, can improve heat exchange efficiency to realize high heat exchange efficiency. Therefore, the electric heat storage device has the advantages of good heat storage effect, less heat loss and high heat exchange efficiency.

Drawings

FIG. 1 is a schematic view of an electric heat storage device according to the present invention;

fig. 2 is a schematic view of the operation of the electric heat storage apparatus shown in fig. 1.

In the figure: the heat storage device comprises 10-an electric heat storage device, 1-an electric heating unit, 2-a heat storage unit, 3-a heat exchange unit, 4-a fan, 5-an air duct, 6-an electric heating resistance rod and 7-a heat exchanger.

Detailed Description

The embodiments of the invention will be described and explained more fully hereinafter with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of an electric heat storage device of the present invention, and fig. 2 is a schematic view of an operation process of the electric heat storage device.

As shown in fig. 1, the electric heat storage device 10 includes an electric heating unit 1, a heat storage unit 2, a heat exchange unit 3, a fan 4 and an air duct 5; electric heating unit 1, heat-retaining unit 2, fan 4 and heat transfer unit 3 concatenate and constitute a confined circulation system on wind channel 5, and wherein, electric heating unit 1 establishes inside heat-retaining unit 2, and fan 4 is close to heat-retaining unit 2 and sets up, and heat-retaining unit 2 passes through wind channel 5 and is connected with heat transfer unit 3.

The electric heating unit 1 comprises one or more electric resistance rods 6, and the electric resistance rods 6 are uniformly distributed in the electric heating unit 1.

The heat storage unit 2 is made of solid heat storage materials. The solid heat storage material has excellent heat preservation performance and high heat storage density, the highest heat storage temperature can reach 600 ℃ and 800 ℃, so that the heat can be stored by utilizing the off-peak electric energy at night to the maximum extent, and the heat loss is less.

The heat exchange unit 3 comprises a heat exchanger 7.

Further, the heat exchanger 7 is preferably a shell-and-tube heat exchanger.

The fan 4 is preferably an axial fan. An axial flow fan is a fan in which an air flow flows axially into an impeller and flows in an axial direction approximately on a cylindrical surface.

One or more of the air ducts of the electric heating unit 1, the heat storage unit 2, the heat exchange unit 3 and the fan 4 can be correspondingly provided with a plurality of air ducts.

The electric heat storage device of the invention can be operated 24 hours a day. Considering that the electricity consumption condition is divided into three stages of peak, valley and flat, and the electricity consumption is charged in time, the electric heat storage device is generally selected to be electrified to heat and store the heat in the valley period of lowest electricity price and to be powered off in the peak period of electricity consumption.

Fig. 2 is a schematic view of the operation of the electric heat storage device of the present invention. The operation of the electric heat storage device of the present invention will be described below by taking the heat storage at the time of the power consumption valley as an example.

At the time of the valley of electricity consumption (the price of valley electricity is 23: 00 to the next day 7: 00), the electric heat storage device is started to start heating the resistive bar 6. The electric resistance rod 6 releases heat after being electrified to provide heat energy. At this time, the heat storage unit 2 starts storing heat, and as the energization time is longer, the temperature thereof is higher, and the amount of stored heat is larger. The low-temperature gas blown out by the fan 4 enters the heat storage unit 2 in a high-temperature state, and the low-temperature gas contacts with the heat storage material of the heat storage unit 2 and takes away the heat inside the heat storage unit 2, so that the low-temperature gas becomes high-temperature gas. High-temperature gas enters the air duct 5 and enters the heat exchanger 7 along the air duct 5, and the high-temperature gas exchanges heat with cold water outside the heat exchanger 7 in the heat exchanger 7. The heat exchange efficiency depends on the exhaust air volume of the fan 4. The energy transfer is realized through the mechanical energy of the fan. In the process, the cold water is changed into hot water through heat exchange, so that heating for users and domestic hot water supply are realized.

In summary, the electric heating resistance rods of the electric heat storage device are uniformly distributed in the electric heating unit, so that the heat storage unit is uniformly heated, the heat storage effect is good, and the heat loss is less; and the fan volume of airing exhaust is big more, and heat exchange efficiency is high more, through the volume of airing exhaust that increases the fan, can improve heat exchange efficiency to realize high heat exchange efficiency. Therefore, the electric heat storage device has the advantages of good heat storage effect, less heat loss and high heat exchange efficiency.

The technical solutions and preferred embodiments of the present invention have been described above in clear and in detail. It is to be understood that the described embodiments are merely preferred embodiments of the invention, rather than all embodiments, and that the invention is not limited thereto. All other embodiments, which can be obtained by modifications, equivalents and/or simple variations without inventive step, are included in the scope of the present invention by those skilled in the art.