CN206001687U - A kind of heat storage electric boiler system - Google Patents

Abstract

The utility model relates to a regenerative electric boiler system, comprising an electric boiler, a circulation pump, a water tank, a controller, the controller and the circulation pump, an electric two-way valve on the boiler side, an electric three-way valve for water supply, and an electric three-way valve for return water , the electric three-way valve on the water tank side, and the electric three-way valve on the boiler side are all connected; The electric three-way valves are all connected, the return water electric three-way valve is connected with the return water main pipe and the water inlet pipe, the electric three-way valve on the boiler side is connected with the electric boiler and the circulation pump, and the electric boiler and the circulation pump are connected through the electric two-way valve on the boiler side. The water supply electric three-way valve is connected with the circulation pump, the water inlet pipe and the water supply main pipe. A liquid level gauge is arranged in the water tank, a water replenishment control valve is arranged on the water replenishment pipe, and the water replenishment control valve is connected with the liquid level gauge. The utility model has reasonable design, simple structure, reduces electricity cost, saves investment cost and floor space.

Description

A regenerative electric boiler system

technical field

The utility model relates to a thermal storage type electric boiler system, which is mainly used for constant temperature water supply for process hot water or air-conditioning hot water heating of various workshops and civil buildings.

Background technique

Electric boiler heat storage water supply stores heat in the heat storage medium during the low power consumption period of the grid; releases the heat stored in the heat storage medium for hot water users during the peak power consumption period of the power grid, and combines microscopically The characteristics of different prices for power supply at different times save operating costs for users. Macroscopically, it plays a role in shifting peaks and filling valleys for the power grid, which is beneficial to the safe and economical operation of the power grid. Therefore, the regenerative electric boiler system is widely used in various production enterprises, hotels, residential heating centers and other occasions that require process hot water or air-conditioning hot water heating.

In the current design, two sets of hot water pumps are often installed in the heat storage system of the electric boiler. One set is used as a heat storage pump, that is, circulating pressure between the electric boiler and the heat storage tank, and the other is used as a water supply pump, that is, between the electric boiler or the heat storage tank. The cycle pressurization between the hot water tank and the user leads to high equipment investment costs, complicated hot water pipes, and increases the chance of heat dissipation and water leakage; at the same time, due to the large area occupied by the equipment, it also increases the civil construction cost of the boiler room. In addition, the heat flow short circuit between the hot water entering and exiting the heat storage water tank is also prone to occur, resulting in uneven water temperature in the water tank and low outlet water temperature, which cannot meet the hot water demand of the process or air conditioner.

Contents of the invention

The technical problem solved by the utility model is to overcome the above-mentioned defects in the prior art, and provide a circulating pump shared pipeline system capable of both heat storage and water supply, which saves a set of circulating pumps and reduces the cost of equipment and pipelines. The cost is reduced, the floor space between the water pumps is reduced, and the water inlet and outlet pipes of the heat storage water tank are improved at the same time.

The technical solution adopted by the utility model to solve the problems of the technologies described above is:

A regenerative electric boiler system, including an electric boiler, a circulation pump, a water tank, a controller, the controller and the circulation pump, an electric two-way valve on the boiler side, an electric three-way valve for water supply, an electric three-way valve for return water, and an electric three-way valve on the side of the water tank. The three-way valve and the electric three-way valve on the boiler side are connected; the water tank has a water inlet pipe, an outlet pipe, a water supply pipe and a drainage device, and the electric three-way valve on the water tank side is connected to the electric three-way valve on the boiler side, the water outlet pipe, and the return water electric three-way valve Both are connected, the return water electric three-way valve is connected with the return water main pipe and the water inlet pipe, the boiler side electric three-way valve is connected with the electric boiler and the circulation pump, the electric boiler and the circulation pump are connected through the boiler side electric two-way valve, and the water supply electric three-way The valve is connected with the circulating pump, the water inlet pipe and the main water supply pipe.

Preferably, the electric two-way valve on the boiler side is respectively connected to the inlet of the circulation pump and the hot water outlet of the electric boiler. The two-way valve on the boiler side is only for opening and closing switching, not for flow control.

Preferably, the electric three-way valve for water supply is respectively connected to the outlet of the circulating pump, the water inlet pipe of the water tank and the main water supply pipe. The water supply electric three-way valve is used for both flow direction switching and flow control.

Preferably, the return water electric three-way valve is respectively connected to the return water main pipe, the water inlet pipe of the water tank, and the straight-through port of the electric three-way valve on the side of the water tank. The backwater electric three-way valve only does flow direction switching, not flow control.

Preferably, the electric three-way valve on the side of the water tank is respectively connected to the water outlet pipe of the water tank, the straight-through port of the electric three-way valve on the return water and the straight-through port of the electric three-way valve on the boiler side. The electric three-way valve on the water tank side is only for flow direction switching, not flow control.

Preferably, the electric three-way valve on the boiler side is respectively connected to the inlet of the circulation pump, the hot water inlet of the electric boiler, and the through port of the electric three-way valve on the water tank side. The electric three-way valve on the boiler side only performs flow direction switching, not flow control.

Preferably, the frequency conversion signal of the circulating pump, the switching signal of the electric two-way valve on the boiler side, the electric three-way valve on the return water, the electric three-way valve on the water tank side, the electric three-way valve on the boiler side, the flow rate of the electric three-way valve on the water supply All control signals are transmitted to the controller, which integrates, processes and issues action commands.

Preferably, a liquid level gauge is provided in the water tank, and a water replenishment control valve is provided on the water replenishment pipe. The water replenishment control valve is connected to the liquid level gauge, and the opening and closing is controlled by the liquid level gauge of the water tank. When the liquid level is low, the water replenishment control valve is opened. , When the liquid level is high, the water replenishment control valve is closed.

Preferably, the drainage device is composed of an overflow pipe and a drain pipe.

Preferably, the outlet pipe of the water tank is connected to the lower part of the water tank, and the water inlet pipe is connected to the upper part of the water tank. Small holes of Ф20 are evenly arranged on the water inlet pipe and outlet pipe inside the water tank, and the distance between the centers of adjacent small holes is 50mm.

Preferably, the electric boiler only operates during the off-peak electricity time period, and the water tank is heated by cheap off-peak electricity, and then heat is stored for use. The final temperature of the heat storage is 90-95°C.

Preferably, the water tank is covered with a layer of insulation layer, and the overflow pipe of the water tank also serves as a ventilation pipe and is connected with the drain pipe.

Preferably, the controller is set with five control states, namely electric boiler heat storage state, heat storage tank single heat supply state, electric boiler single heat supply state, electric boiler and heat storage tank combined heat supply state and electric boiler heat storage state. Boiler heat storage and heat supply status. The controller controls different heat storage and heat supply states according to user needs and power supply periods.

The utility model provides an improved regenerative electric boiler system, which uses valley electricity to heat the water tank and store heat, optimizes the pipeline system, makes the heat storage pump double as a water supply pump, and can provide different boilers through the switching action of the electric three-way valve. Thermal storage and heating operating modes.

The utility model is reasonable in design and simple in structure. After heating the water tank to the required temperature at night with relatively cheap valley electricity, heat storage and heat preservation can be used by users during the day, greatly reducing the cost of electricity consumption; the heat storage pump can also be used as a water supply pump, which is optimized The pipeline system saves the investment cost and floor space of the equipment; through the switching action of the electric three-way valve, it can meet the needs of different heat storage and heating conditions.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the heat storage state of the electric boiler according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of a single heating state of a water tank according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a single heating state of an electric boiler according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the joint heating state of the electric boiler and the heat storage tank according to the embodiment of the present invention.

Fig. 6 is a schematic diagram of the heat storage and heat supply state of the electric boiler according to the embodiment of the present utility model.

Fig. 7 is a schematic diagram of opening a water inlet pipe according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of opening a water outlet pipe according to an embodiment of the present invention.

Explanation of reference signs:

1 is electric boiler, 2 is boiler side electric two-way valve, 3 is circulation pump, 4 is boiler side electric three-way valve, 5 is water supply electric three-way valve, 6 is water tank side electric three-way valve, 7 is water tank, 8 Water inlet pipe, 9 water outlet pipe, 10 liquid level gauge, 11 water supply control valve, 12 return water electric three-way valve, 13 water supply main pipe, 14 water replenishment pipe, 15 return water main pipe, 17 overflow Pipe, 18 are drainage pipes.

detailed description

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

As shown in Figure 1, it is an improved thermal storage electric boiler system, including an electric boiler 1, a circulating pump 3, a water tank 7, and a controller (not shown in the figure, which is the prior art). Among them, the controller controls and adjusts the actions of the circulating pump 3, the boiler side electric two-way valve 2, the water supply electric three-way valve 5, the return water electric three-way valve 12, the water tank side electric three-way valve 6, and the boiler side electric three-way valve 4 ; The water tank 7 has an inlet pipe 8 , an outlet pipe 9 , an overflow pipe 17 , a drain pipe 18 , and a liquid level gauge 10 .

Figure 2 shows the flow direction of hot water in the heat storage state of the electric boiler in this embodiment. The low-temperature hot water in the water tank 7 is supplied through the outlet pipe 9 at the bottom, through the bypass port of the electric three-way valve 6 on the water tank side and the electric three-way valve on the boiler side. The straight port of valve 4 enters the electric boiler 1, and after heating, it enters the circulation pump 3 through the electric two-way valve 2 on the boiler side. After the circulation pump 3 is pressurized, it passes through the bypass port of the water supply electric three-way valve 5 and passes through the water inlet pipe of the water tank 7 8 enters water tank 7, completes a hot water circulation. When the controller is in this state, it controls the boiler side electric two-way valve 2 to open, the boiler side electric three-way valve 4 straight port to open, the bypass port to close, the water supply electric three-way valve 5 bypass port to open, and the water supply main pipe 13 side straight port Close, water tank side electric three-way valve 6 bypass ports are opened, backwater main pipe 15 side straight-through ports are closed, backwater electric three-way valves 12 are closed.

Figure 3 shows the hot water flow direction of the water tank 7 in the single heating state of this embodiment. The high-temperature hot water in the water tank 7 passes through the outlet pipe 9 at the bottom, passes through the bypass port of the electric three-way valve 6 on the side of the water tank and the electric three-way valve on the boiler side. The bypass port of the through valve 4 enters the circulating water pump 3. After the circulating pump 3 is pressurized, it enters the water supply main pipe 13 through the straight port of the water supply electric three-way valve 5, and supplies water to the outside. The return water of the return water main pipe 15 passes through the return water electric three-way The bypass port of the valve 12 returns to the water tank 7 through the water inlet pipe 8 of the water tank 7 to complete a hot water cycle. When the controller is in this state, it controls boiler side electric two-way valve 2 to close, boiler side electric three-way valve 4 bypass port to open, electric boiler 1 side straight port to close, water supply electric three-way valve 5 straight port to open, bypass port Close, the water tank side electric three-way valve 6 bypass port is opened, the backwater main pipe 15 side straight-through port is closed, the return water electric three-way valve 12 bypass port is opened, and the water tank side electric three-way valve 6 side straight-through port is closed.

Figure 4 shows the hot water flow direction of the electric boiler 1 in the single heating state of this embodiment. The high-temperature hot water of the electric boiler 1 enters the circulation pump 3 through the electric two-way valve 2 on the boiler side, and the circulation pump 3 is pressurized by the water supply electric three-way valve. The straight port of the through valve 5 enters the water supply main pipe 13 for external water supply, the return water of the return water main pipe 15 passes through the straight port of the backwater electric three-way valve 12, the straight port of the electric three-way valve 6 on the water tank side and the electric three-way valve on the boiler side The straight-through mouth of 4 returns to electric boiler 1, completes a hot water cycle. When the controller is in this state, it controls the electric two-way valve 2 on the boiler side to open, the electric three-way valve 4 on the boiler side to open the direct port, the bypass port to close, the water supply electric three-way valve 5 to open the direct port, the bypass port to close, and the water tank side The 6 straight ports of the electric three-way valve are opened, and the bypass port is closed, and the 12 direct ports of the backwater electric three-way valve are opened, and the bypass port is closed.

Figure 5 shows the flow direction of hot water when the electric boiler 1 and the water tank 7 are combined for heating in this embodiment. The high-temperature hot water in the water tank 7 is supplied through the outlet pipe 9 at the bottom, the bypass port of the electric three-way valve 6 on the side of the water tank and The straight-through port of the electric three-way valve 4 on the boiler side enters the electric boiler 1, and enters the circulation pump 3 through the electric two-way valve 2 on the boiler side after reheating, and the circulation pump 3 passes through the straight-through port of the water supply electric three-way valve 5 after pressurization Enter water supply main pipe 13, external water supply, the return water of return water main pipe 15 returns to water tank 7 through the water inlet pipe 8 of water tank 7 through the bypass port of backwater electric three-way valve 12, completes a hot water cycle. When the controller is in this state, it controls the electric two-way valve 2 on the boiler side to open, the electric three-way valve 4 on the boiler side to open the direct port, the bypass port to close, the water supply electric three-way valve 5 to open the direct port, the bypass port to close, and the water tank side The 6 bypass ports of the electric three-way valve are opened, the 15 side straight-through ports of the return water main pipe are closed, the 12 bypass ports of the return water electric three-way valve are opened, and the 6 side straight-through ports of the water tank side electric three-way valve are closed.

Figure 6 shows the hot water flow direction of the electric boiler 1 in the heat storage and heat supply state of this embodiment. The high-temperature hot water of the electric boiler 1 enters the circulation pump 3 through the electric two-way valve 2 on the boiler side, and the circulation pump 3 is pressurized and then supplied by water. The electric three-way valve 5 is divided into two paths, one path enters the water supply main pipe 13 through the straight-through port of the water supply electric three-way valve 5, and supplies water to the outside, and the other path enters the water tank 7 through the water inlet pipe 8 through the bypass port of the water supply electric three-way valve 5; The return water of the return water main pipe 15 passes through the straight port of the return water electric three-way valve 12, the low-temperature hot water of the water tank 7 passes through the outlet pipe 9, and the two-way water is mixed at the electric three-way valve 6 on the water tank side, and passes through the electric three-way valve on the water tank side. The straight-through port of valve 6 and the straight-through port of electric three-way valve 4 on the boiler side return to electric boiler 1 to complete a hot water cycle. When the controller is in this state, it controls the boiler side electric two-way valve 2 to open, the boiler side electric three-way valve 4 straight port to open, the bypass port to close, the water supply electric three-way valve 5 straight port and the bypass port to open, and adjust Water supply main pipe 13 and water inlet pipe 8 two-way flows of water tank 7, water tank side electric three-way valve 6 straight-through ports and bypass ports are all opened, backwater electric three-way valve 12 straight-through ports are opened, and bypass ports are closed.

Fig. 7 is a drawing of the opening of the water inlet pipe 8 in this embodiment. The water inlet pipe 8 is opened at both ends outside the water tank 7, and the water enters in two ways. Small holes of Ф20 are evenly arranged on the water inlet pipe 8 in the water tank 7, and the center distance between two adjacent small holes is 50mm.

Fig. 8 is a hole diagram of the water outlet pipe 9 of this embodiment. The water outlet pipe 9 is opened at one end outside the water tank 7, and water is fed all the way. Small holes of Ф20 are evenly arranged on the pipes of the water outlet pipe 9 in the water tank 7. The distance between the centers of two adjacent small holes is 50mm.

Any simple deformation or equivalent replacement of the design concept of the present utility model shall be deemed to fall within the protection scope of the present utility model.

Claims (8)

1. a kind of heat storage electric boiler system, including electric boiler, circulating pump, water tank, controller, is characterized in that controller and circulation Pump, boiler side electric two-way valve, water supply electric T-shaped valve, backwater electric T-shaped valve, water tank side electric T-shaped valve, boiler side are electronic Triple valve is all connected with；Water tank has water inlet pipe, outlet pipe, filling pipe and drainage arrangement, water tank side electric T-shaped valve and boiler side Electric T-shaped valve, outlet pipe, backwater electric T-shaped valve are all connected with, and backwater electric T-shaped valve is connected with return main, water inlet pipe, pot Furnace side electric T-shaped valve is connected with electric boiler, circulating pump, and electric boiler is connected by boiler side electric two-way valve with circulating pump, is supplied water Electric T-shaped valve is all connected with circulating pump, water inlet pipe, water main.

2. heat storage electric boiler system according to claim 1, is characterized in that：Liquid level gauge, filling pipe is provided with water tank Moisturizing control valve is provided with, the moisturizing control valve is connected with liquid level gauge.

3. heat storage electric boiler system according to claim 1 and 2, is characterized in that：The drainage arrangement by overflow pipe and Drainpipe constitutes.

4. heat storage electric boiler system according to claim 1 and 2, is characterized in that：The outlet pipe is installed in water tank Bottom, water inlet pipe is installed in the top of water tank.

5. heat storage electric boiler system according to claim 4, is characterized in that：On the water inlet pipe, water outlet pipeline all Even placement diameter is 20 millimeters of aperture, and the spacing between adjacent apertures center is 50 millimeters.

6. heat storage electric boiler system according to claim 1 and 2, is characterized in that：One layer of heat preservation is surrounded by outside the water tank Layer.

7. heat storage electric boiler system according to claim 3, is characterized in that：The overflow pipe doubles as breather pipe.

8. heat storage electric boiler system according to claim 3, is characterized in that：The overflow pipe is connected with drainpipe.