A kind of instant heating and storage-conversion integrated warm water dispenser for kindergarten and its control method

Abstract

The present invention discloses a rapid heating and storage-exchange integrated warm water dispenser for kindergartens and its control method. The water dispenser includes a heat preservation water storage tank, a water heating device, a water inlet pipeline, a water intake pipe and a main control circuit. The heat preservation water storage tank is communicated with the water intake pipe. A heat exchange pipeline is arranged in the heat preservation water storage tank. The heat exchange pipeline includes an outer pipe and an inner pipe which are sleeved with each other. One end of the outer pipe is communicated with the water inlet pipeline, and one end of the inner pipe is communicated with the inside of the heat preservation water storage tank; the heating device is a self-regulating nano-film heating module. The self-regulating nano-film heating module includes a nano-film heating tube and a temperature control circuit. The nano-film heating tube is provided with a water boiling cavity and a water inlet and a water outlet communicated with the water boiling cavity. The temperature control circuit is electrically connected with the nano-film heating tube and controls the temperature of the water outlet to be above 92 degrees Celsius; the other end of the inner pipe is communicated with the water outlet of the nano-film heating tube. The water storage and heat exchange integrated water tank of the present invention can both store water and exchange heat, greatly saving the internal installation structure and effectively improving the heat exchange efficiency at the same time.

Description

Technical Field

[0001] The present invention relates to a water dispenser, in particular to an integrated instant heating, storage and replacement warm water dispenser for kindergartens and its control method. Background Art

[0002] Current warm water dispensers are all equipped with a heat exchange pipe and a warm water storage tank. The heat exchange pipe includes an outer pipe and an inner pipe that are sleeved with each other. Normal temperature water flows into the outer pipe, and boiling water flows into the inner pipe. The boiling water exchanges heat with the normal temperature water in the outer pipe through the inner pipe wall to form warm water. The warm water is then transferred to the warm water storage tank through a pipeline for storage so that users can immediately take out the warm water. However, since the heat exchange pipe and the warm water storage tank are separately and dispersedly arranged, they occupy a large space. Moreover, more pipelines need to be connected, the number of connection points increases, the installation is troublesome, and the risk of water leakage is higher. In addition, the heat exchange pipe is exposed, resulting in serious heat loss and increased energy consumption.

[0003] Chinese Patent Document No. CN CN202120345633.1 discloses a drinking water device with reflux circulation heat preservation and sterilization on February 5, 2021, which includes a water tank assembly, an instant heating water boiling assembly and a heat exchanger. The heat exchanger is provided with a first heat exchange water channel and a second heat exchange water channel. The first heat exchange water channel is provided with a low-temperature water inlet and a first heat exchange outlet, and the second heat exchange water channel is provided with a high-temperature water inlet and a second heat exchange outlet. The first heat exchange outlet is communicated with the water inlet of the instant heating water boiling assembly through a first water inlet pipe, the high-temperature water inlet is communicated with the water outlet of the instant heating water boiling assembly, and the second heat exchange outlet is communicated with the water inlet end of the water tank assembly. A drainage end is provided at the lower part of the water tank assembly, and the drainage end is connected to the first water inlet pipe through a return pipe. A one-way valve and a circulation water pump are sequentially installed on the return pipe along the water flow direction. The heat exchanger of this structure is externally arranged and has the above-mentioned deficiencies. In addition, the water boiling speed of the instant heating water boiling assembly is relatively slow. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated instant heating, storage and replacement warm water dispenser for kindergartens with a reasonable structure, small volume and fast heating speed and its control method.

[0005] The purpose of the present invention is achieved as follows:

[0006] An integrated instant heating, storage and replacement warm water dispenser for kindergartens includes a heat preservation storage tank, a water heating device, a water inlet pipeline, a water taking pipe and a main control circuit. The heat preservation storage tank is provided with a water taking port, and the water taking port is connected to a water outlet nozzle through the water taking pipe and a water outlet switch device. It is characterized in that: a heat exchange pipeline is arranged in the heat preservation storage tank, and the heat exchange pipeline includes an outer pipe and an inner pipe that are sleeved with each other. One end of the outer pipe is communicated with the water inlet pipeline, and one end of the inner pipe is communicated with the inside of the heat preservation storage tank;

[0007] The heating device is a self-regulating nanofilm heating module. The self-regulating nanofilm heating module includes a nanofilm heating tube and a temperature control circuit. The nanofilm heating tube is provided with a water boiling chamber, an inlet and an outlet communicating with the water boiling chamber. The temperature control circuit is electrically connected to the nanofilm heating tube and controls the temperature of the outlet to be above 92 degrees Celsius.

[0008] The other end of the inner tube communicates with the outlet of the nanofilm heating tube.

[0009] A temperature sensor is provided in the heat preservation water storage tank. A drain port is provided at the bottom of the heat preservation water storage tank. The drain port communicates with one end of the return water path. The other end of the return water path and the other end of the outer tube communicate with the inlet of the water heating device.

[0010] The main control circuit is electrically connected to the water outlet switch device, the temperature control circuit, and the temperature sensor respectively.

[0011] The object of the present invention can also be solved by the following technical measures:

[0012] As a more specific solution, the heat exchange pipeline is spirally wound in the heat preservation water storage tank, or the heat exchange pipeline is wound along the inner wall surface of the heat preservation water storage tank. One end of the outer tube is a purified water inlet, and the other end of the outer tube is a warm water outlet. One end of the inner tube is a warm boiled water outlet, and the other end of the inner tube is a high-temperature water inlet. An overflow port is provided above the heat preservation water storage tank and corresponding to the heat exchange pipeline. A water level sensor is provided below the overflow port. The water level sensor is electrically connected to the main control circuit.

[0013] As a further solution, the water inlet pipeline includes a water inlet pipe and a water inlet solenoid valve. One end of the water inlet pipe is connected to the purified water source through the water inlet solenoid valve, and the other end of the water inlet pipe is connected to the purified water inlet of the heat exchange pipeline.

[0014] As a further solution, the return water path includes a return water pipe, a circulation pump and a one-way valve. The return water pipe is connected between the drain port and the inlet of the nanofilm heating tube. The circulation pump and the one-way valve are arranged on the return water pipe. The one-way valve restricts the water flow from flowing from the drain port direction to the inlet direction.

[0015] As a further solution, the water inlet pipeline includes a normal temperature and pressure water storage tank, a water inlet pipe and a water outlet pipe. The two ends of the water inlet pipe are connected between the normal temperature and pressure water storage tank and the purified water source. The two ends of the water outlet pipe are connected between the normal temperature and pressure water storage tank and the purified water inlet of the heat exchange pipeline. The normal temperature and pressure water storage tank is located above the heat preservation water storage tank.

[0016] As a further solution, the return water waterway includes a return water pipe and a three-way reversing valve. One end of the return water pipe is connected to the drain port, and the water inlet of the nano-film heating tube is selectively communicated with the other end of the return water pipe and the warm water outlet of the outer pipe through the three-way reversing valve.

[0017] As a further solution, the overflow port is communicated with the drain pipe through an overflow pipe. The drain port is connected to one end of a first service valve, and the other end of the first service valve is respectively connected to the return water pipe and one end of a drain solenoid valve. The other end of the drain solenoid valve is connected to the drain pipe; the water intake port is connected to a water intake pipe through a second service valve, and the water outlet switch device is a water outlet solenoid valve or a booster pump.

[0018] As a further solution, the self-regulating nano-film heating module further includes a flow meter, a self-priming pump, a flow regulating valve, a thyristor water cooling box and a water outlet temperature sensor. The water inlet is sequentially communicated with the water outlet through the flow meter, the self-priming pump, the flow regulating valve, the thyristor water cooling box and the nano-film heating tube. The water outlet temperature sensor is arranged on the water outlet, and the water outlet temperature sensor, the flow meter, the self-priming pump and the flow regulating valve are respectively electrically connected to the temperature control circuit. The temperature control circuit is provided with a thyristor, and the thyristor water cooling box is used to cool the thyristor.

[0019] A fast-heating storage and replacement integrated kindergarten warm water dispenser and its control method. The purified water source flows into the self-regulating nano-film heating module through the outer pipe of the heat exchange pipeline. After the self-regulating nano-film heating module detects the water flow, it starts heating and closes the inlet solenoid valve. After the purified water source is heated to boiling, the inlet solenoid valve is opened, and the boiled water enters the heat preservation water storage tank through the inner pipe of the heat exchange pipeline. This cycle continues until the water level switch in the heat preservation water storage tank detects that the water is full, and then the above heating and water inlet are stopped;

[0020] When warm water needs to be taken, the water outlet solenoid valve is opened to release water;

[0021] In the standby state, when the temperature sensor in the heat preservation water storage tank detects that the water temperature is lower than the set temperature value, the circulation water pump and the self-regulating nano-film heating module are started simultaneously until the water temperature in the heat preservation water storage tank is raised to the set temperature value, and then the circulation heating is stopped.

[0022] Another fast-heating storage and replacement integrated kindergarten warm water dispenser and its control method, characterized in that: the purified water source flows into the normal temperature and normal pressure water storage tank for storage. At the same time, it flows through the outer pipe of the heat exchange pipeline from the normal temperature and normal pressure water storage tank and then enters the self-regulating nano-film heating module through a three-way reversing valve. After the self-regulating nano-film heating module detects the water flow, it starts heating and closes the three-way reversing valve. After the purified water source is heated to boiling, the three-way reversing valve is opened, and the boiled water enters the heat preservation water storage tank through the inner pipe of the heat exchange pipeline. This cycle continues until the water level switch in the heat preservation water storage tank detects that the water is full, and then the above heating and water inlet are stopped;

[0023] When warm water needs to be taken, the booster pump starts to drain water;

[0024] In the standby state, when the temperature sensor in the heat preservation water storage tank detects that the water temperature is lower than the set temperature value, the other channel of the three-way reversing valve and the self-regulating nanofilm heating module are opened simultaneously until the water temperature in the heat preservation water storage tank is raised to the set temperature value and then the circulating heating stops.

[0025] The beneficial effects of the present invention are as follows:

[0026] (1) The water storage and heat exchange integrated water tank of the present invention can both store water and exchange heat, greatly saving the internal installation structure and effectively improving the heat exchange efficiency. Moreover, the self-regulating nanofilm heating module is used for heating, which has a small volume, fast heating speed, energy saving and high efficiency, and ensures that the outlet water temperature is constant within a safe range.

[0027] (2) The water storage tank of the water dispenser of the present invention integrates a heat exchange pipe, has a small and beautiful appearance, and can be used in a vertical, desktop or wall-mounted manner, especially suitable for kindergartens, and well solves the problem that large water dispensers cannot be placed due to limited site space in kindergarten classrooms.

[0028] (2) The water dispenser of the present invention integrates purification, heating, cooling, storage, heat preservation and sterilization. Brief Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the water path principle of the water dispenser according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic diagram of the structure of the heat preservation water storage tank in the present invention.

[0031] Figure 3 It is a schematic diagram of the structure of the self-regulating nanofilm heating module in the present invention.

[0032] Figure 4 It is a principle block diagram of the self-regulating nanofilm heating module in the present invention.

[0033] Figure 5 It is a schematic diagram of the water path principle of the water dispenser according to another embodiment of the present invention. Detailed Embodiments

[0034] The present invention will be further described below in conjunction with the drawings and embodiments:

[0035] Embodiment 1, see Figures 1 to 4As shown in the figure, a rapid heating and storage-exchange integrated warm water dispenser for kindergartens includes a heat preservation water storage tank 1, a water heating device, a water inlet pipeline, a water intake pipe and a main control circuit. The heat preservation water storage tank 1 is provided with a water intake port 11. The water intake port 11 is connected to a water outlet nozzle 63 through a water intake pipe 6 and a water outlet switch device. A heat exchange pipeline 4 is arranged in the heat preservation water storage tank 1. The heat exchange pipeline 4 includes an outer pipe 41 and an inner pipe 42 which are sleeved with each other. One end of the outer pipe 41 is communicated with the water inlet pipeline, and one end of the inner pipe 42 is communicated with the inside of the heat preservation water storage tank 1; The heating device is a self-regulating nano-film heating module 5. The self-regulating nano-film heating module 5 includes a nano-film heating tube 57 and a temperature control circuit 58. The nano-film heating tube 57 is provided with a water boiling cavity and a water inlet 51 and a water outlet 52 communicated with the water boiling cavity. The temperature control circuit 58 is electrically connected to the nano-film heating tube 57 and controls the temperature of the water outlet 52 to be above 92 degrees Celsius; The other end of the inner pipe 42 is communicated with the water outlet 52 of the nano-film heating tube 57; A temperature sensor 3 is arranged in the heat preservation water storage tank 1. A drain port 12 is arranged at the bottom of the heat preservation water storage tank 1. The drain port 12 is communicated with one end of a return water waterway. The other end of the return water waterway and the other end of the outer pipe 41 are communicated with the water inlet 51 of the water heating device; The main control circuit is electrically connected to the water outlet switch device, the temperature control circuit 58 and the temperature sensor 3 respectively.

[0036] The heat exchange pipeline 4 is wound along the inner wall surface of the heat preservation water storage tank 1; One end of the outer pipe 41 is a purified water inlet 411, and the other end of the outer pipe 41 is a warm water outlet 412. One end of the inner pipe 42 is a warm and boiled water outlet 422, and the other end of the inner pipe 42 is a high-temperature water inlet 421; An overflow port 13 is arranged above the upper part of the heat preservation water storage tank 1 and corresponding to the heat exchange pipeline 4. A water level sensor 2 is arranged below the overflow port 13. The water level sensor 2 is electrically connected to the main control circuit.

[0037] The water inlet pipeline includes a water inlet pipe 8 and a water inlet solenoid valve 82. One end of the water inlet pipe 8 is communicated with a purified water source through the water inlet solenoid valve 82, and the other end of the water inlet pipe 8 is communicated with the purified water inlet 411 of the heat exchange pipeline 4. The purified water source is formed by filtering and purifying tap water through a purification device 81.

[0038] The return water waterway includes a return pipe 53, a circulation pump 55 and a check valve 54. The return pipe 53 is connected between the drain port 12 and the water inlet 51 of the nano-film heating tube 57. The circulation pump 55 and the check valve 54 are arranged on the return pipe 53. The check valve 54 restricts the water flow from flowing from the drain port 12 direction to the water inlet 51 direction.

[0039] The overflow port 13 is communicated with the drain pipe 7 through an overflow pipe 14. The drain port 12 is connected to one end of a first service valve 71. The other end of the first service valve 71 is respectively connected to a return pipe 53 and one end of a drain solenoid valve 72. The other end of the drain solenoid valve 72 is connected to the drain pipe 7. The water intake port 11 is connected to a water intake pipe 6 through a second service valve 61, and the water outlet switching device is a water outlet solenoid valve 62.

[0040] The self-regulating nanofilm heating module 5 further includes a flow meter 59, a self-priming pump 592, a flow regulating valve 593, a thyristor water cooling box 594, and a water outlet temperature sensor 521. The water inlet 51 is sequentially communicated with the water outlet 52 through the flow meter 59, the self-priming pump 592, the flow regulating valve 593, the thyristor water cooling box 594, and a nanofilm heating tube 57. The water outlet temperature sensor 521 is arranged on the water outlet 52. The water outlet temperature sensor 521, the flow meter 59, the self-priming pump, and the flow regulating valve are respectively electrically connected to the temperature control circuit 58. The temperature control circuit 58 is provided with a thyristor, and the thyristor water cooling box is used to cool the thyristor. As a further solution, a second one-way valve 596 and an anti-electric leakage joint 572 (such as a joint based on the principle of an anti-electricity wall) can also be connected between the thyristor water cooling box 594 and the nanofilm heating tube 57. The self-regulating nanofilm heating module 5 further includes a sewage outlet 571, and the sewage outlet 571 is communicated with the bottom of the nanofilm heating tube 57. When it is necessary to empty the accumulated water in the nanofilm heating tube 57, just open the sewage outlet 571.

[0041] The working principle of the self-regulating nanofilm heating module 5 is as follows: The flow meter 59 detects the water flow, and the flow regulating valve 593 is used to control the flow rate.

[0042] Basic principle: The actions of the module mainly include flow rate control, temperature control, water output control, preheating, fault monitoring and protection. The principles are as follows:

[0043] Flow rate control: Taking the target flow rate issued by the upper computer as the control target, detect the real-time flow rate fed back by the flow meter at the beginning of each water output. When there is a difference, adjust the voltage of the self-priming water pump or the opening degree of the flow regulating valve to regulate the flow rate.

[0044] Water temperature control: Taking the target temperature issued by the upper computer as the control target, during the water output process, monitor the real-time temperature of the water outlet of the module, and dynamically adjust the flow rate of the self-priming water pump or the flow regulating valve and the output power of the heating tube to achieve the purpose of controlling the water temperature.

[0045] Water output control: Taking the water output issued by the upper computer as the control target, continuously accumulate the water output of the flow meter during the water output process. When the target water output is reached, automatically stop the module from working.

[0046] Preheating: Aiming to reach the target temperature sent by the host computer as soon as possible, before each water outlet starts, turn on the heating pipe for a period of time according to the size of the target temperature to raise the temperature to a certain level and then discharge water.

[0047] Fault monitoring and protection: During the operation of the module, when the instantaneous pulse number of the flowmeter, the resistance value of the NTC, the working current of the flow regulating valve are not within the preset range or there is an abnormal communication with the host computer, the module will report the fault and stop working.

[0048] The host computer is the main control circuit of the drinking fountain.

[0049] A fast-heating, storage and replacement integrated kindergarten warm water drinking fountain and its control method. Tap water enters the purification device 81 along the a1 direction to form the purified water source. The purified water source flows into the self-regulating nano-film heating module 5 through the outer pipe 41 of the heat exchange pipeline 4 along the a2 arrow. After the self-regulating nano-film heating module 5 detects the water flow, it starts heating and closes the inlet solenoid valve 82. After the purified water source is heated to boiling (which plays a role in sterilization), the inlet solenoid valve 82 is opened, and the boiled water enters the heat preservation water tank 1 through the inner pipe 42 of the heat exchange pipeline 4. This cycle continues until the water level switch in the heat preservation water tank 1 detects that the water is full, and then the above heating and water inlet stop;

[0050] When warm water needs to be taken, the outlet solenoid valve 62 is opened to discharge water (as shown by the c1 and c2 arrow directions in Figure 2 . The outlet solenoid valve 62 can adopt an intelligent touch button and optoelectronic induction (inducing the water cup) to take water integrally, taking water quantitatively (outputting a fixed amount each time), making it convenient to take water and more suitable for children to use.

[0051] In the standby state, when the temperature sensor 3 in the heat preservation water tank 1 detects that the water temperature is lower than the set temperature value, the circulation water pump and the self-regulating nano-film heating module 5 are started and turned on simultaneously until the water temperature in the heat preservation water tank 1 is raised to the set temperature value and then the circulation heating stops (the water from the heat preservation water tank 1 enters the self-regulating nano-film heating module 5 along the b1 and b2 arrow directions for heating and then enters the heat preservation water tank 1 through the inner pipe 42).

[0052] When the water level is too high due to a fault, the water in the water tank can be drained along the d arrow direction from the overflow port 13; when it is necessary to empty the water tank, the drain solenoid valve 72 can be controlled to open, and the water in the water tank is drained along the e1 and e2 arrow directions.

[0053] Embodiment 2, the difference from Embodiment 1 is: Refer to Figure 5As shown, the water inlet pipeline includes a normal temperature and pressure storage tank 9, a water inlet pipe 8 and a water outlet pipe 91. Both ends of the water inlet pipe 8 are connected between the normal temperature and pressure storage tank 9 and the purified water source. Both ends of the water outlet pipe 91 are connected between the normal temperature and pressure storage tank 9 and the purified water inlet 411 of the heat exchange pipeline 4. The normal temperature and pressure storage tank 9 is located above the heat preservation storage tank 1.

[0054] The return water pipeline includes a return water pipe 53 and a three-way reversing valve 56. One end of the return water pipe 53 is connected to the drain port 12. The water inlet 51 of the nano-membrane heating tube 57 is selectively communicated with the other end of the return water pipe 53 and the warm water outlet 412 of the outer pipe 41 through the three-way reversing valve 56.

[0055] The water outlet switch device is a booster pump 64.

[0056] A rapid heating and storage-integrated kindergarten warm water dispenser and its control method. After tap water enters the purification device 81 along the a1 direction, the purified water source is formed. The purified water source flows into the normal temperature and pressure storage tank 9 along the a2 arrow direction for storage. At the same time, it flows through the outer pipe 41 of the heat exchange pipeline 4 along the a3 arrow direction from the normal temperature and pressure storage tank 9 and then enters the self-regulating nano-membrane heating module 5 through the three-way reversing valve 56 (AC end connected). After the self-regulating nano-membrane heating module 5 detects the water flow, it starts heating and closes the three-way reversing valve 56. After the purified water source is heated to boiling, the three-way reversing valve 56 is opened. The boiled water enters the heat preservation storage tank 1 through the inner pipe 42 of the heat exchange pipeline 4. Such a cycle continues until the water level switch in the heat preservation storage tank 1 detects that the water is full and then stops the above heating and water inlet.

[0057] When warm water needs to be taken, the booster pump 64 starts to release water (as shown by the c1 and c2 arrow directions in Figure 5 ). The booster pump 64 can adopt an integrated intelligent touch button and photoelectric induction (sensing the water cup) for water intake, with quantitative water intake (a fixed amount is output each time), making water intake convenient and more suitable for children to use.

[0058] In the standby state, when the temperature sensor 3 in the heat preservation storage tank 1 detects that the water temperature is lower than the set temperature value, another channel of the three-way reversing valve 56 (AB end connected) and the self-regulating nano-membrane heating module 5 are opened simultaneously until the water temperature in the heat preservation storage tank 1 is raised to the set temperature value and then the circulating heating stops (the water coming out of the storage tank 1 enters the self-regulating nano-membrane heating module 5 for heating along the b1 and b2 arrow directions and then enters the storage tank 1 through the inner pipe 42).

[0059] When there is a fault and the water level is too high, the water in the storage tank can be drained along the d arrow direction from the overflow port 13; when it is necessary to empty the storage tank, the drain solenoid valve 72 can be controlled to open, and the water in the storage tank is drained along the e1 and e2 arrow directions.

[0060] The above is the preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A fast-heating integrated storage and replacement warm water dispenser for kindergartens, comprising a heat preservation storage water tank (1), a water heating device, a water inlet pipeline, a water intake pipe and a main control circuit. The heat preservation storage water tank (1) is provided with a water intake port (11), and the water intake port (11) is connected to a water outlet nozzle (63) through a water intake pipe (6) and a water outlet switch device, and is characterized in that: A heat preservation water storage tank (1) is provided with a heat exchange pipeline (4). The heat exchange pipeline (4) includes an outer pipe (41) and an inner pipe (42) sleeved with each other. One end of the outer pipe (41) is communicated with a water inlet pipeline, and one end of the inner pipe (42) is communicated with the inside of the heat preservation water storage tank (1); The heating device is a self-regulating nano-film heating module (5). The self-regulating nano-film heating module (5) includes a nano-film heating tube (57) and a temperature control circuit (58). The nano-film heating tube (57) is provided with a water boiling cavity and a water inlet (51) and a water outlet (52) communicated with the water boiling cavity. The temperature control circuit (58) is electrically connected with the nano-film heating tube (57) and controls the temperature of the water outlet (52) to be above 92 degrees Celsius; The other end of the inner pipe (42) is communicated with the water outlet (52) of the nano-film heating tube (57); A temperature sensor (3) is provided in the heat preservation water storage tank (1). A drain port (12) is provided at the bottom of the heat preservation water storage tank (1). The drain port (12) is communicated with one end of a return water pipeline. The other end of the return water pipeline and the other end of the outer pipe (41) are communicated with the water inlet (51) of the water heating device; The main control circuit is electrically connected with the water outlet switch device, the temperature control circuit (58), and the temperature sensor (3).

2. The instant-heating and storage-exchanging integrated kindergarten warm water dispenser according to claim 1, wherein: The heat exchange pipeline (4) is spirally wound in the heat preservation water storage tank (1), or the heat exchange pipeline (4) is wound along the inner wall surface of the heat preservation water storage tank (1); One end of the outer pipe (41) is a clean water inlet (411), and the other end of the outer pipe (41) is a warm water outlet (412). One end of the inner pipe (42) is a warm boiled water outlet (422), and the other end of the inner pipe (42) is a high-temperature water inlet (421); An overflow port (13) is provided in the upper part of the heat preservation water storage tank (1) and above the corresponding heat exchange pipeline (4). A water level sensor (2) is provided below the overflow port (13). The water level sensor (2) is electrically connected with the main control circuit.

3. The instant-heating integrated storage and replacement kindergarten warm water dispenser according to claim 2, wherein: The water inlet pipeline includes a water inlet pipe (8) and a water inlet solenoid valve (82). One end of the water inlet pipe (8) is communicated with a clean water source through the water inlet solenoid valve (82), and the other end of the water inlet pipe (8) is communicated with the clean water inlet (411) of the heat exchange pipeline (4).

4. The instant-heating integrated storage and replacement kindergarten warm water dispenser according to claim 3, wherein: The return water pipeline includes a return pipe (53), a circulation pump (55), and a one-way valve (54). The return pipe (53) is connected between the drain port (12) and the water inlet (51) of the nano-film heating tube (57). The circulation pump (55) and the one-way valve (54) are arranged on the return pipe (53). The one-way valve (54) restricts the water flow from flowing from the direction of the drain port (12) to the direction of the water inlet (51).

5. The instant-heating integrated storage and replacement kindergarten warm water dispenser according to claim 2, characterized in that: The water inlet pipeline includes a normal temperature and normal pressure water storage tank (9), a water inlet pipe (8), and a water outlet pipe (91). Both ends of the water inlet pipe (8) are connected between the normal temperature and normal pressure water storage tank (9) and the clean water source. Both ends of the water outlet pipe (91) are connected between the normal temperature and normal pressure water storage tank (9) and the clean water inlet (51) of the heat exchange pipeline (4). The normal temperature and normal pressure water storage tank (9) is located above the heat preservation water storage tank (1).

6. The instant-heating and storage-exchanging integrated warm water dispenser for kindergarten according to claim 5, wherein: The return water circuit includes a return water pipe (53) and a three-way reversing valve (56). One end of the return water pipe (53) is connected to the drain port (12), and the water inlet (51) of the nano-film heating tube (57) is selectively communicated with the other end of the return water pipe (53) and the warm water outlet (412) of the outer pipe (41) through the three-way reversing valve (56).

7. The instant-heating integrated storage and replacement kindergarten warm water dispenser according to claim 2, wherein: The overflow port (13) is communicated with the drain pipe (7) through an overflow pipe (14). The drain port (12) is connected to one end of a first service valve (71). The other end of the first service valve (71) is respectively connected to the return water pipe (53) and one end of a drain solenoid valve (72). The other end of the drain solenoid valve (72) is connected to the drain pipe (7). The water intake port (11) is connected to a water intake pipe (6) through a second service valve (61). The water outlet switching device is a water outlet solenoid valve (62) or a booster pump (64).

8. The instant-heating and integrated storage-and-exchange kindergartener warm water dispenser according to claim 1, wherein: The self-regulating nano-film heating module (5) further includes a flow meter (59), a self-priming pump, a flow regulating valve, a thyristor water-cooled box, and a water outlet temperature sensor (521). The water inlet (51) is communicated with the water outlet (52) through the flow meter (59), the self-priming pump, the flow regulating valve, the thyristor water-cooled box, and the nano-film heating tube (57) in sequence. The water outlet temperature sensor (521) is arranged on the water outlet (52). The water outlet temperature sensor (521), the flow meter (59), the self-priming pump, and the flow regulating valve are respectively electrically connected to the temperature control circuit (58). The temperature control circuit (58) is provided with a thyristor, and the thyristor water-cooled box is used to cool the thyristor.

9. A control method for the instant heating and storage-exchanging integrated warm water dispenser for kindergarten according to claim 4, characterized in that: The purified water source flows into the self-regulating nano-film heating module (5) through the outer pipe (41) of the heat exchange pipeline (4). After the self-regulating nano-film heating module (5) detects the water flow, it starts heating and closes the inlet solenoid valve (82). After the purified water source is heated to boiling, the inlet solenoid valve (82) is opened. The boiled water enters the heat preservation water tank (1) through the inner pipe (42) of the heat exchange pipeline (4). Such a cycle continues until the water level switch in the heat preservation water tank (1) detects that the water is full, and then the above heating and water inlet stop; When it is necessary to draw warm water, the water outlet solenoid valve (62) is opened to release water; In the standby state, when the temperature sensor (3) in the heat preservation water tank (1) detects that the water temperature is lower than the set temperature value, the circulation water pump and the self-regulating nano-film heating module (5) are started and opened simultaneously until the water temperature in the heat preservation water tank (1) is raised to the set temperature value, and then the circulation heating stops.

10. A control method for the instant heating and storage-and-exchange integrated warm water dispenser for kindergarten according to claim 6, characterized in that: The described water purification water source flows into and is stored in the normal temperature and pressure storage tank (9). At the same time, it flows through the outer pipe (41) of the heat exchange pipeline (4) from the normal temperature and pressure storage tank (9), then passes through the three-way reversing valve (56) and enters the self-regulating nano-membrane heating module (5). After the self-regulating nano-membrane heating module (5) detects the water flow, it starts heating and closes the three-way reversing valve (56). After the water purification water source is heated to boiling, the three-way reversing valve (56) is opened, and the boiled water enters the heat preservation storage tank (1) through the inner pipe (42) of the heat exchange pipeline (4). Such a cycle continues until the water level switch in the heat preservation storage tank (1) detects that the water is full, and then the above heating and water inlet stop; When warm water needs to be taken, the booster pump (64) starts to drain water; In the standby state, when the temperature sensor (3) in the heat preservation storage tank (1) detects that the water temperature is lower than the set temperature value, another channel of the three-way reversing valve (56) and the self-regulating nano-membrane heating module (5) are opened simultaneously until the water temperature in the heat preservation storage tank (1) is raised to the set temperature value, and then the circulating heating stops.

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