CN204593861U - Electrical heating type solid heat storage equipment - Google Patents

Abstract

The utility model is an electric heating type solid heat storage device. Several ventilation ducts are arranged on the length direction of the heat storage body body, and several electric heating wire channels are arranged on the width direction of the heat storage body body; along the length direction of the heat storage body body direction, the heating wire installed in the heating wire channel is divided into at least two units; the power on and off of each unit is individually controlled. It can ensure the temperature balance of the heat storage body and prevent the temperature of the heating wire from being too high.

Description

Electric heating solid heat storage equipment

technical field

The utility model relates to an electric heating type solid heat storage device.

Background technique

As a new type of energy storage system, the electric heating solid heat storage equipment, its main function is to use low-valley electricity, wind power generation and photovoltaic solar power generation to heat the solid energy storage material and store heat energy, and store the heat energy during the peak period of power supply Continuous release to the heating system or domestic hot water system.

The solid heat storage material used in the existing electric heating solid heat storage equipment is generally magnesia bricks, and several channels are reserved between the bricks along the length of the heat storage body. These passages are used both as ventilation ducts and as heating wire passages. In the process of electric heating and wind circulation, since this channel structure can only adopt the unified heating and power-off mode, it is impossible to realize segmental control heating along the length direction. These channels have relatively obvious temperature gradients in the front and rear directions, resulting in the temperature of the heat storage body Unbalanced, it is easy to cause the heating wire to be damaged due to excessive local temperature.

On the other hand, the Chinese utility model with the authorized notification number CN204119543U discloses "a heating wiring device for electric heating type solid heat storage equipment". It is detachably placed in the insulation material, and a clamping plate is set outside the ceramic tube to connect the heating wire and the power cord. When the heating wire needs to be replaced, the heating wire can be pulled out from one end by opening the clamping plate, and No other parts need to be disassembled. It has been found in practice that this method can indeed simplify the replacement operation of the heating wire, but the problem of heat dissipation from the center hole of the ceramic tube used is relatively prominent, which greatly affects the heat storage performance of the heat storage device.

Utility model content

The technical problem to be solved by the utility model is to provide an electric heating solid heat storage device. First, the heat storage bodies in different temperature regions are controlled separately through the segmented control mode to ensure the temperature balance of the heat storage bodies; second, By improving the structural shape of the ceramic tube at both ends of the heating wire, the heat loss rate of the center hole of the ceramic tube is minimized.

The technical scheme of the utility model is as follows:

An electric heating solid heat storage device, including a heat storage body composed of several heat storage bricks, characterized in that: the length of the heat storage body is provided with several ventilation ducts, and the width of the heat storage body is There are several heating wire channels along the direction; along the length of the heat storage body, the heating wires installed in the heating wire channels are divided into at least two units; the power on and off of each unit is controlled separately.

The heat storage brick has a vertical vertical surface on the left and right, a vertical end surface on the front and rear, a bottom surface with transparent grooves in the left and right directions, and a bottom surface that is located directly above the bottom surface and is shorter than the width of the bottom surface in the left and right direction. The top surface of the top surface, between the top surface and the vertical surface is an inclined surface or an inner concave surface on the left and right; the vertical facades of the left and right blocks of the heat storage brick are bonded, the vertical end faces of the front and rear blocks are bonded, and the bottom surfaces of the upper and lower layers are bonded and grooved The notches are facing each other, forming several air passages surrounded by the grooves that run through the length of the heat storage body in the upward direction, and forming several slopes of adjacent heat storage bricks that run through the width of the heat storage body in the upward direction. Or the heating wire channel surrounded by the inner concave surface.

It also includes a ceramic tube used to lead the end of the heating wire out of the body of the heat storage device; the central hole wall of the ceramic tube has a bell mouth section, which is close to the outer end of the ceramic tube; the bell mouth section to the outer end of the ceramic tube The diameter of the central hole wall is smaller than the diameter of the central hole wall from the bell mouth section to the inner end of the ceramic tube.

The positive effect of the utility model is:

First, every nine heating wires of the utility model are set as a group, and several groups are an independent control unit. These control units are arranged along the length of the heat storage body, and each unit is controlled separately. After reaching the set temperature, the corresponding unit Automatically stops heating, so it can ensure the temperature balance of the heat storage body and prevent the temperature of the heating wire from being too high.

Second, because the heating wire channel and the ventilation channel do not interfere with each other, on the one hand, the contact between the high temperature heating wire and the flowing air is reduced, the oxidation degree of the heating wire is reduced, and the life of the heating wire is prolonged. On the other hand, the ventilation resistance is reduced, and the air duct ventilation is smoother.

Third, the ceramic tube is made of high temperature resistant material, and has a through hole inside, which is used for the heating wire to pass out of the furnace. The through holes are circular holes with unequal radii, which can prevent heat loss to the greatest extent.

Description of drawings

Fig. 1 is a schematic diagram of the side shape of the utility model heat storage brick.

Fig. 2 is a schematic diagram of the end face shape of the heat storage brick of the present invention.

Fig. 3 is a schematic diagram of the side structure shape of the heat storage body body of the utility model perpendicular to the ventilation duct.

Fig. 4 is a schematic diagram of the shape of the end surface of the utility model heat storage body body perpendicular to the heating wire channel.

Fig. 5 is a schematic diagram of the layout of the electric heating wire grouping sub-units of the utility model.

Fig. 6 is a schematic diagram of the structural shape of the ceramic tube at both ends of the heating wire of the present invention.

Detailed ways

Further illustrate the utility model below in conjunction with accompanying drawing and embodiment.

The embodiment of the utility model includes a heat accumulator body formed by stacking several heat accumulator bricks.

As shown in Figures 1 and 2, the heat storage brick has a vertical facade 2 on the left and right, a vertical end surface 5 on the front and rear, a bottom surface 3 with a groove 4 that is transparent in the left and right directions, and a bottom surface located on the bottom surface. The top surface 1 directly above and shorter than the width of the bottom surface in the left and right directions, and between the top surface 1 and the vertical surface 2 is a slope or an inner concave surface 6 on the left and right.

As shown in Figure 3 and Figure 4, the vertical facades of the left and right blocks of the heat storage bricks are bonded, the vertical end faces of the front and rear blocks are bonded, the bottom surfaces of the upper and lower layers are bonded, and the grooves are facing each other, forming a heat storage body that runs through the length of the body. Several air passages 7 surrounded by the grooves form several heating wire passages 8 which are formed by the slopes or inner concave surfaces of adjacent heat storage bricks and pass through the width of the heat storage body. The heating wire channel 8 and the ventilation channel 7 are arranged horizontally and perpendicular to each other without interfering with each other.

As shown in Figure 5, along the length of the heat storage body body, the heating wire installed in the heating wire channel 8 is divided into three units, namely DY1 unit, DY2 unit and DY3 unit, and the heating wire 9 in each unit is divided into three units. Divided into several groups, every nine heating wires are set as a group. The power on and off of each unit is individually controlled. Based on this arrangement, the utility model realizes the subsection control mode according to different units. The temperature of each unit is monitored in real time during heating. When each unit reaches the set heat storage temperature, the power is cut off at any time to ensure that the temperature of each unit of the heat storage body is balanced.

As shown in Figure 6, the utility model also includes a ceramic tube 10 for leading the end of the heating wire out of the heat storage device body, and the central hole of the ceramic tube 10 is used for installing the end of the heating wire. During use, the heating wire passes through the outer end of the ceramic tube 10 for connecting the power cord.

The wall of the central hole of the ceramic tube 10 has a section of bell mouth section 11 , and the bell mouth section 11 is as close as possible to the outer end of the ceramic tube 10 . The diameter of the central hole wall from the bell mouth section 11 to the outer end of the ceramic tube 10 is smaller than the diameter of the central hole wall from the bell mouth section 11 to the inner end of the ceramic tube 10 . Multiple experiments have proved that the ceramic tube 10 with this structure has the effect of obviously reducing the heat loss rate of the center hole of the ceramic tube.

Claims (3)

1. an electrical heating type solid heat storage equipment, comprise the heat storage body piled up by some pieces of gitter bricks, it is characterized in that: heat storage body length walks upwards to be provided with some ventilation air ducts (7), heat storage body width walks upwards to be provided with some heating wire passages (8); Along heat storage body length trend, the heating wire be arranged in described heating wire passage (8) is divided at least two unit; The on/off of each unit is carried out and is controlled separately.

2. electrical heating type solid heat storage equipment as claimed in claim 1, it is characterized in that: described gitter brick has each vertical facade (2) around, each vertical end face (5) in front and back, a bottom surface (3) with groove (4) penetrating on left and right directions and one are positioned at directly over bottom surface and be shorter than the end face (1) of bottom width in the lateral direction, is each inclined-plane or inner concave (6) around between end face (1) and vertical facade (2); The vertical facade laminating of gitter brick left and right block, the vertical end face laminating of front and back block, fit in levels bottom surface and groove notch is just right, form heat storage body length and walk some the upwards through ventilation air ducts surrounded by described groove (7), and form heat storage body width and walk some the upwards through heating wire passages (8) surrounded by inclined-plane or the inner concave of adjacent gitter brick.

3. electrical heating type solid heat storage equipment as claimed in claim 1 or 2, is characterized in that: also comprise the earthenware (10) for heating wire end being drawn thermal storage equipment body; The center hole wall of earthenware (10) has one section of oared segrne pii (11), and this oared segrne pii (11) is near the outer end of earthenware (10); This oared segrne pii (11) is less than the center hole wall diameter of this oared segrne pii (11) to earthenware (10) the inner to the center hole wall diameter of earthenware (10) outer end.