CN114294825A - Energy storage water heater and using method thereof - Google Patents

Abstract

The invention discloses an energy storage water heater and a use method thereof, wherein the energy storage water heater comprises an energy storage tank, a first heat exchange pipe, a first valve and a second heat exchange pipe, the second heat exchange pipe is arranged on the first heat exchange pipe, as the two ends of the second heat exchange pipe are respectively positioned at the upstream and the downstream of the first valve, the second heat exchange pipe forms a bypass pipeline, when the temperature in the energy storage tank is higher, most of cold water exchanges heat with the energy storage tank only through the first heat exchange pipe by opening the first valve, and the heat in the energy storage tank is slowly reduced; when the temperature in the energy storage box is lower, the first valve is closed, so that all cold water is subjected to heat exchange with the energy storage box through the first heat exchange tube firstly, and then is subjected to heat exchange with the energy storage box through the second heat exchange tube, the cold water can be heated more fully, the heat in the energy storage box is utilized more effectively, and the outlet water temperature can better meet the use requirement.

Description

A kind of energy storage water heater and its use method

technical field

The invention relates to the technical field of water heaters, in particular to an energy storage water heater and a method of using the same.

Background technique

The phase change energy storage water heater is filled with phase change material in the energy storage shell. Due to the high enthalpy value and high energy storage density of the phase change material, a large amount of heat can be stored. The heat exchange of the change material can displace the heat stored in the phase change material. In the prior art, when a phase change energy storage water heater is used, cold water enters the heat exchange tube. Since the contact area between the heat exchange tube and the phase change material is fixed, the temperature of the water flowing out of the heat exchange tube is insufficient. Adjustment means, when the temperature of the phase change material is low, it may happen that the temperature of the outlet water does not meet the requirements for use.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to provide an energy storage water heater and a method of using the same, which can more effectively utilize the heat in the energy storage tank and make the outlet water temperature better meet the requirements of use.

The above technical problems are solved through the following technical solutions:

An energy storage water heater, comprising:

storage tank;

A first heat exchange tube, the first heat exchange tube includes a water inlet section, a heat exchange section and a water outlet section, the heat exchange section is arranged inside the energy storage tank, and the water inlet section and the water outlet section are both It is arranged outside the energy storage tank, and the water inlet section and the water outlet section are respectively connected with both ends of the heat exchange section;

a first valve, which is arranged on the water outlet section;

The second heat exchange tube, part of the second heat exchange tube is arranged in the energy storage tank, both ends of the second heat exchange tube are connected to the water outlet section, and the two ends of the second heat exchange tube are connected to the water outlet section. The ends are respectively upstream and downstream of the first valve.

The use method of the above-mentioned energy storage water heater is: set the switching temperature, when the temperature inside the energy storage tank is greater than or equal to the switching temperature, open the first valve, so that the cold water mainly exchanges heat with the energy storage tank through the first heat exchange tube; When the temperature inside the energy storage tank is lower than the switching temperature, the first valve is closed, so that the cold water first exchanges heat with the energy storage tank through the first heat exchange pipe, and then exchanges heat with the energy storage tank through the second heat exchange pipe.

Compared with the background technology, the energy storage water heater of the present invention has the following beneficial effects:

The energy storage water heater of the present invention is provided with a second heat exchange pipe on the first heat exchange pipe. Since the two ends of the second heat exchange pipe are respectively located upstream and downstream of the first valve, the second heat exchange pipe forms a bypass pipe. When the internal temperature of the energy storage tank is high, by opening the first valve, most of the cold water only exchanges heat with the energy storage tank through the first heat exchange tube, and the heat inside the energy storage tank decreases slowly; When the temperature is low, by closing the first valve, all the cold water will first exchange heat with the energy storage tank through the first heat exchange pipe, and then exchange heat with the energy storage tank through the second heat exchange pipe, so that the cold water can be more fully recovered. Heating, so as to more effectively use the heat in the energy storage tank, so that the water temperature can better meet the requirements of use.

In one of the embodiments, the energy storage water heater further includes a flow sensor and a second valve, and both the flow sensor and the second valve are arranged on the water inlet section.

In one of the embodiments, the energy storage water heater further includes a buffer tank, a water supplement pipe and a third valve, one end of the water supplement pipe is connected to the water inlet section and is located between the flow sensor and the second valve, The flow sensor is located upstream of the second valve, the other end of the water supply pipe is connected to the buffer tank, the third valve is arranged on the water supply pipe, and the water outlet section is far away from the heat exchange section One end is connected to the buffer tank.

In one embodiment, the buffer tank includes a tank body, a water outlet pipe and a first electric heating pipe, the first electric heating pipe is arranged inside the tank body, and the water outlet pipe is partially inserted into the tank body, so The tank body is provided with a first water inlet and a second water inlet, the water outlet section communicates with the inside of the tank body through the first water inlet, and the water replenishing pipe communicates with the tank through the second water inlet internal communication.

In one embodiment, one end of the water outlet pipe in the tank is located above the first water inlet and the second water inlet.

In one of the embodiments, the energy storage water heater further includes a water outlet anti-electric wall, and the water outlet anti-electric wall is arranged on the water outlet pipe and is located outside the tank body.

In one of the embodiments, the energy storage water heater further includes a water inlet and electricity-proof wall, and the water inlet and electricity-proof wall is arranged on the water inlet section.

In one embodiment, the energy storage tank includes an outer shell, a thermal insulation layer, an inner tank, a second electric heating tube and a phase change material, the thermal insulation layer is arranged between the outer shell and the inner tank, and the phase The variable material and the second electric heating pipe are arranged in the inner tank.

In one embodiment, the energy storage tank further includes a temperature sensor, the temperature sensor is arranged in the inner tank, the first valve is a solenoid valve, and the first valve is connected to the temperature sensor.

Description of drawings

FIG. 1 is a schematic structural diagram of an energy storage water heater according to an embodiment of the present invention.

In the picture:

1. Energy storage tank; 11. Shell; 12. Insulation layer; 13. Inner tank; 14. Second electric heating tube; 2. First heat exchange tube; 21. Water inlet section; 22. Heat exchange section; 23. Water outlet Section; 3, the first valve; 4, the second heat exchange pipe; 5, the flow sensor; 6, the second valve; 7, the buffer tank; 71, the tank body; 72, the water outlet pipe; 73, the first electric heating pipe; 81 , water supply pipe; 82, the third valve; 91, water outlet wall; 92, water inlet wall; 100, the first water inlet; 200, the second water inlet.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

As shown in FIG. 1 , an energy storage water heater in an embodiment includes an energy storage tank 1, a first heat exchange tube 2, a first valve 3 and a second heat exchange tube 4. The first heat exchange tube 2 includes a water inlet section 21, The heat exchange section 22 and the water outlet section 23, the heat exchange section 22 is arranged inside the energy storage tank 1, the water inlet section 21 and the water outlet section 23 are both arranged outside the energy storage tank 1, the water inlet section 21 and the water outlet section 23 are respectively connected with the heat exchange section The two ends of the section 22 are connected, the first valve 3 is arranged on the water outlet section 23, the second heat exchange tube 4 is partly arranged in the energy storage tank 1, and both ends of the second heat exchange tube 4 are connected to the water outlet section 23. Both ends of the second heat exchange tube 4 are located upstream and downstream of the first valve 3 respectively.

The use method of the energy storage water heater in this embodiment is as follows: first, the switching temperature is set, and the switching temperature is selected according to actual needs. When the temperature inside the energy storage tank 1 is greater than or equal to the switching temperature, the first valve 3 is opened to make the cold water Heat exchange is performed with the energy storage tank 1 through the first heat exchange tube 2; when the temperature inside the energy storage tank 1 is lower than the switching temperature, the first valve 3 is closed, so that the cold water first passes through the first heat exchange tube 2 and the energy storage tank 1 Heat exchange is performed, and then heat exchange is performed with the energy storage tank 1 through the second heat exchange tube 4 .

In the energy storage water heater of this embodiment, a second heat exchange tube 4 is arranged on the first heat exchange tube 2. Since the two ends of the second heat exchange tube 4 are respectively located upstream and downstream of the first valve 3, the second heat exchange tube 4. A bypass pipeline is formed. When the internal temperature of the energy storage tank 1 is relatively high, by opening the first valve 3, most of the cold water only exchanges heat with the energy storage tank 1 through the first heat exchange pipe 2, and the interior of the energy storage tank 1 When the internal temperature of the energy storage tank 1 is low, by closing the first valve 3, all the cold water will first pass through the first heat exchange tube 2 to exchange heat with the energy storage tank 1, and then pass through the second heat exchange. The pipe 4 exchanges heat with the energy storage tank 1, and the cold water can be more fully heated, so that the heat in the energy storage tank 1 can be more effectively utilized, and the outlet water temperature can better meet the usage requirements.

Further, the energy storage water heater further includes a flow sensor 5 and a second valve 6 , and both the flow sensor 5 and the second valve 6 are arranged on the water inlet section 21 . By arranging the flow sensor 5 and the second valve 6 on the water inlet section 21 , it is possible to monitor whether hot water is currently being used and decide whether to introduce cold water into the heat exchange section 22 of the first heat exchange tube 2 .

Further, the energy storage water heater also includes a buffer tank 7, a water supply pipe 81 and a third valve 82. One end of the water supply pipe 81 is connected to the water inlet section 21 and is located between the flow sensor 5 and the second valve 6, and the flow sensor 5 is located at the water inlet section 21. Upstream of the second valve 6 , the other end of the water supply pipe 81 is connected to the buffer tank 7 , the third valve 82 is arranged on the water supply pipe 81 , and the end of the water outlet section 23 away from the heat exchange section 22 is connected to the buffer tank 7 . A certain amount of hot water can be stored in the buffer tank 7, so that the flow rate of the effluent is more stable. By setting the water supply pipe 81 and the third valve 82, on the one hand, the water temperature in the buffer tank 7 can be adjusted, and on the other hand, the water temperature can be adjusted. The buffer tank 7 can also be replenished with water.

Specifically, the buffer tank 7 includes a tank body 71 , a water outlet pipe 72 and a first electric heating pipe 73 , the first electric heating pipe 73 is arranged inside the tank body 71 , the water outlet pipe 72 is partially inserted into the tank body 71 , the water outlet section 23 and the water supply pipe 81 Both are connected to the tank body 71 and form a first water inlet 100 and a second water inlet 200 on the tank body 71 . When the internal temperature of the energy storage tank 1 is low, the temperature of the water flowing into the buffer tank 7 from the water outlet section 23 may be lower than the usage requirements. The water temperature meets the requirements for use. The tank body 71 can be made of thermal insulation materials to reduce heat loss.

Further, the water outlet pipe 72 is arranged vertically, and one end of the water outlet pipe 72 in the tank body 71 is located above the first water inlet 100 and the second water inlet 200 . The first water inlet 100 and the second water inlet 200 are set at lower positions, so that the water in the buffer tank 7 can flow out from the water outlet pipe 72 after being heated, so as to ensure the stability of the outlet water temperature.

The water outlet pipe 72 is also provided with a water outlet electricity-proof wall 91 , and the water outlet electricity-proof wall 91 is located outside the tank body 71 . When the water in the tank 71 is charged, the water outlet anti-electricity wall 91 increases the resistance of the water channel by extending the length of the water channel, thereby protecting the human body.

Further, the water inlet section 21 is also provided with a water inlet anti-electricity wall 92, which can further improve the safety of the energy storage water heater.

The energy storage tank 1 includes an outer shell 11, a thermal insulation layer 12, an inner tank 13, a second electric heating tube 14 and a phase change material (not shown in the figure). The thermal insulation layer 12 is arranged between the outer shell 11 and the inner tank 13. The phase change material And the second electric heating pipe 14 is arranged in the inner tank 13 . Phase change materials have the ability to change their physical state within a certain temperature range. Taking the solid-liquid phase transition as an example, when heated to the melting temperature, a phase transition from solid to liquid occurs. During the melting process, the phase change material absorbs and stores a large amount of latent heat; when the phase change material cools, the stored Heat is dissipated to the environment within a certain temperature range, and the reverse phase transition from liquid to solid is carried out. During these two phase transitions, the energy stored or released is called the latent heat of phase transition. The phase change material in this embodiment is a solid-liquid phase material, the second electric heating tube 14 is used to heat the solid phase change material into a liquid state, and the liquid phase change material can be exchanged with the first heat exchange tube 2 and the second heat exchange tube 14. The heat pipe 4 conducts sufficient heat exchange, so that the water temperature rises rapidly. The thermal insulation layer 12 is selected according to the properties of the phase change material, and needs to be able to withstand the highest temperature that the phase change material can reach.

Further, the energy storage tank 1 further includes a temperature sensor (not shown in the figure), and the temperature sensor is arranged in the inner tank 13 . The temperature sensor can monitor the real-time temperature of the phase change material and provide the basis for the operation of the energy storage water heater.

Furthermore, the first valve 3 is a solenoid valve, and the first valve 3 is connected with the temperature sensor. When the temperature sensor detects that the real-time temperature of the phase change material is lower than a specific value, the first valve 3 is automatically closed, so that all the cold water flows out through the second heat exchange tube 4; when the temperature sensor detects that the real-time temperature of the phase change material is lower than the specified value When the temperature is high, the first valve 3 is automatically opened, and most of the cold water flows out only after passing through the first heat exchange tube 2, realizing automatic control.

In the specific content of the above-mentioned specific embodiments, the technical features can be combined in any non-contradictory combination. For the sake of brevity, all possible combinations of the above-mentioned technical features are not described. However, as long as the combination of these technical features does not exist Inconsistencies should be considered within the scope of this specification.

The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (10)

1. An energy storage water heater, comprising:

an energy storage tank (1);

the first heat exchange tube (2) comprises a water inlet section (21), a heat exchange section (22) and a water outlet section (23), the heat exchange section (22) is arranged inside the energy storage box (1), the water inlet section (21) and the water outlet section (23) are both arranged outside the energy storage box (1), and the water inlet section (21) and the water outlet section (23) are respectively connected with two ends of the heat exchange section (22);

a first valve (3), the first valve (3) being arranged on the water outlet section (23);

the energy storage box (1) is provided with a water outlet section (23), the energy storage box (1) is provided with a first heat exchange pipe (4), the first heat exchange pipe (4) is partially arranged in the energy storage box (1), two ends of the first heat exchange pipe (4) are connected with the water outlet section (23), and two ends of the first heat exchange pipe (4) are respectively arranged at the upstream and the downstream of the first valve (3).

2. The energy-storing water heater of claim 1, further comprising a flow sensor (5) and a second valve (6), wherein the flow sensor (5) and the second valve (6) are both disposed on the water inlet section (21).

3. The energy storage water heater of claim 2, further comprising a buffer tank (7), a water supplementing pipe (81) and a third valve (82), wherein one end of the water supplementing pipe (81) is connected with the water inlet section (21) and is located between the flow sensor (5) and the second valve (6), the flow sensor (5) is located at the upstream of the second valve (6), the other end of the water supplementing pipe (81) is connected with the buffer tank (7), the third valve (82) is arranged on the water supplementing pipe (81), and one end of the water outlet section (23) far away from the heat exchange section (22) is connected with the buffer tank (7).

4. The energy storage water heater of claim 3, characterized in that the buffer tank (7) comprises a tank body (71), a water outlet pipe (72) and a first electric heating pipe (73), the first electric heating pipe (73) is arranged inside the tank body (71), the water outlet pipe (72) is partially inserted into the tank body (71), a first water inlet (100) and a second water inlet (200) are arranged on the tank body (71), the water outlet section (23) is communicated with the inside of the tank body (71) through the first water inlet (100), and the water replenishing pipe (81) is communicated with the inside of the tank body (71) through the second water inlet (200).

5. The energy-storing water heater of claim 4, characterized in that the end of the outlet pipe (72) inside the tank (71) is above the first inlet (100) and the second inlet (200).

6. The energy storage water heater of claim 4, further comprising an outlet electricity-proof wall (91), wherein the outlet electricity-proof wall (91) is arranged on the outlet pipe (72) and is positioned outside the tank body (71).

7. The energy storage water heater of claim 2, further comprising a water inlet electricity-proof wall (92), wherein the water inlet electricity-proof wall (92) is arranged on the water inlet section (21).

8. The energy storage water heater of claim 1, characterized in that the energy storage tank (1) comprises a shell (11), a heat insulation layer (12), a liner (13), a second electric heating tube (14) and a phase change material, wherein the heat insulation layer (12) is arranged between the shell (11) and the liner (13), and the phase change material and the second electric heating tube (14) are arranged in the liner (13).

9. The energy-storing water heater according to claim 8, characterized in that the energy-storing tank (1) further comprises a temperature sensor, the temperature sensor is arranged in the inner container (13), the first valve (3) is an electromagnetic valve, and the first valve (3) is connected with the temperature sensor.

10. A method of use of an energy storing water heater according to any one of claims 1 to 9, characterized in that a switching temperature is set, and when the temperature inside the energy storing tank (1) is equal to or higher than the switching temperature, the first valve (3) is opened to cause cold water to exchange heat with the energy storing tank (1) mainly through the first heat exchanging pipe (2); when the temperature in the energy storage box (1) is lower than the switching temperature, the first valve (3) is closed, so that cold water firstly passes through the first heat exchange tube (2) to exchange heat with the energy storage box (1), and then passes through the second heat exchange tube (4) to exchange heat with the energy storage box (1).

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