An instant hot water dispenser

Abstract

The present invention relates to the technical field of water heaters, and discloses an instant water heater, including a water heating device and a water inlet pipe. The water inlet pipe includes a main water inlet pipe connected to a water storage tank. One end of the main water inlet pipe is connected to the water storage tank, and the other end of the main water inlet pipe is connected to a water outlet flow control device through a first water pump. The water outlet flow control device is connected to the water heating device through a water outlet adjusting device. The water outlet adjusting device includes a main water outlet pipe, a first water outlet pipe and a second water outlet pipe. One end of the main water outlet pipe is connected to the water inlet of the water heating device, and the other end of the main water outlet pipe is connected to one ends of the first water outlet pipe and the second water outlet pipe. The other end of the first water outlet pipe is connected to the water outlet flow control device through a second water pump, and the other end of the second water outlet pipe is directly connected to the water outlet flow control device. The flow rate of the first water pump is greater than that of the second water pump, which can not only burn water immediately when needed, but also have the effect of discharging both boiling water and warm water without changing the power of the water heating device.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to an instant water heater. Background Art

[0002] With the improvement of people's living standards, the acceleration of the pace of life, and the pursuit of a healthy life, the requirements for drinking water have gradually increased. Water heaters are safe, hygienic, energy-saving and environment-friendly, and are deeply loved by consumers. All existing water heaters on the market have a water storage inner tank, which needs to be heated first before use, requiring a certain waiting time, unable to supply water continuously, and the unused water needs to be reheated repeatedly, consuming energy for heat preservation, and there are problems of mixed water and over-boiled water, which is not good for people's health. Even if there is an instant water heater, it cannot ensure that the water coming out is boiled, thus affecting drinking health. In addition, existing water heaters have a single function and can only provide drinking water but not other required hygienic water.

[0003] In addition, when existing water heaters are respectively boiling water or heating warm water, they generally adjust the power of the heating unit by setting a complex control module. And it takes a certain amount of time for the water to be heated by the heating element to a suitable temperature. After testing, it takes at least about 5S to reflect. Whether increasing or decreasing the power, the increased or decreased heat cannot be immediately transferred to the water to cause the water temperature to rise or fall. Therefore, when the water flow fluctuates, causing an increase or decrease in the flow rate, it is very difficult to achieve by adjusting the power of the heating element to cope with the temperature change caused by the flow rate change with the existing control technology. Summary of the Invention

[0004] The purpose of the present invention is to provide an instant water heater, which can achieve instant heating and burning, will not produce the problems of over-boiled water or mixed water, and can also achieve the effect of discharging boiling water and warm water without changing the power of the water heater, and also has the advantages of high temperature control accuracy, safety and reliability, energy saving and low cost.

[0005] The above technical purpose of the present invention is achieved by the following technical solutions:

[0006] An instant water heater includes a water heater and a water inlet pipe. The water inlet pipe includes a main water inlet pipe connected to a water storage tank. One end of the main water inlet pipe is connected to the water storage tank, and the other end of the main water inlet pipe is connected to a water outlet flow control device through a first water pump. The water outlet flow control device is connected to the water heater through a water outlet adjusting device. The water outlet adjusting device includes a main water outlet pipe, a first water outlet pipe, and a second water outlet pipe. One end of the main water outlet pipe is connected to the water inlet of the water heater, and the other end of the main water outlet pipe is connected to one ends of the first water outlet pipe and the second water outlet pipe. The other end of the first water outlet pipe is connected to the water outlet flow control device through a second water pump, and the other end of the second water outlet pipe is directly connected to the water outlet flow control device. The flow rate of the first water pump is greater than that of the second water pump.

[0007] By adopting the above technical solution, after starting the first water pump, the water in the water storage tank is pumped into the flow control device through the main water inlet pipe. The flow control device controls the water to be discharged into the main water outlet pipe from the first water outlet pipe or the second water outlet pipe according to the demand for boiling water, warm water or cold water, and is discharged into the water heater through the water outlet pipe and heated as needed. Since the flow rates of the first water pump and the second water pump are different, the flow control device controls the second water pump to pump water into the first water outlet pipe or still uses the first water pump as the power to pump water into the second drain pipe, ensuring that the flow rates of the water entering the main water outlet pipe from the first water outlet pipe and the second water outlet pipe are different. Thus, when boiling water is needed, a small flow rate enters the water heater through the main water outlet pipe for heating; when warm water or cold water is needed, a large flow rate enters the water heater through the main water outlet pipe for heating; when cold water is needed, a large flow rate enters the water heater through the main water outlet pipe and is directly discharged without heating. When the present invention discharges cold water, the water heater does not work. When boiling water and warm water are discharged, even if the water heater heats the water at the same power, it can be achieved. Therefore, without changing the power of the water heater, it has the effects of discharging boiling water and warm water, greatly simplifies the control process of the equipment, and effectively reduces the equipment cost.

[0008] A further setting of the present invention is that: the water outlet flow control device includes a first box body and a second box body. The first box body is located in the inner cavity of the second box body. The bottom of the first box body is an open receiving cavity, and the second box body is a sealed receiving cavity. There is a through hole at the top of the second box body, and a third water inlet is provided at the bottom of the second box body. The outer wall of the first box body is in sealed cooperation with the inner wall of the second box body. The first box body can slide up and down along the inner cavity of the second box body. A first water inlet and a second water inlet are respectively provided on the same side of the first box body and the second box body. A first spring is provided at the bottom of the first box body. The upper end of the first spring is connected to the first box body, and the lower end of the first spring is connected to the second box body.

[0009] By adopting the above technical solution, when it is necessary to boil water, under the action of the supporting force of the first spring, the water inlet one of the first box body and the water inlet two of the second box body are at the same height. At this time, the water inlet one and the water inlet two are communicated with each other. When water enters from the water inlet two, it can ensure that water can enter the inner cavity of the first box body located inside the second box body. When the water inflow reaches a certain amount, under the action of water pressure, the first box body moves upward against the elastic force of the first spring, so that the communication area between the water inlet one and the water inlet two gradually decreases until the communication area between the water inlet one and the water inlet two is zero. At this time, neither the water inlet one of the first box body nor the water inlet two of the second box body can intake water. Therefore, the water pressure in the first box body will not continue to rise. At this time, the first water pump is turned off and the second water pump is started. The water can only enter the main water outlet pipe from the first water outlet pipe in a small flow rate driven by the second water pump and enter the water heater from the main water outlet pipe for heating. Since the flow rate is small, it can be quickly boiled and thus flow out in the form of boiling water. When only hot water is needed, water only enters from the water inlet three at the bottom of the second box body. When the water inflow reaches a certain amount, under the action of water pressure, the first box body moves upward against the elastic force of the first spring until it abuts against the top of the second box body and cannot move upward continuously. At this time, as the water continues to enter from the water inlet three, the water pressure in the first box body gradually increases. As the water pressure in the first box body increases, the water in the first box body directly enters the main water outlet pipe from the two pipes of the first water outlet pipe and the second water outlet pipe in a large flow rate under the action of the water supply pressure of the first water pump and enters the water heater for heating. Since the flow rate is large, it is difficult to boil the water during the heating process and it can only flow out in the form of warm water. When only cold water is needed, the water entering the main water outlet pipe from the two pipes of the first water outlet pipe and the second water outlet pipe can be directly discharged without heating after entering the water heater. The setting of the through hole at the top of the second box body makes the pressure at the upper end of the second box body always constant, thus ensuring that the first box body can smoothly slide up and down along the inner wall of the second box body, making the reliability of the water outlet flow control process better.

[0010] A further setting of the present invention is that: the water outlet adjusting device further includes a water collecting tank, and a water inlet four is provided at the bottom of the water collecting tank. The water inlet four at the bottom of the water collecting tank is communicated with the water inlet three at the bottom of the second box body through a connecting water pipe.

[0011] By adopting the above technical solution, the water collecting tank serves as a transition unit connecting the second box body with the first water outlet pipe and the second water outlet pipe, and is used for caching the water entering the first water outlet pipe and the second water outlet pipe, ensuring that the water entering the first water outlet pipe and the second water outlet pipes will not be affected by the fluctuation of the water inlet pressure, thus ensuring better stability of the water pressure entering the water heater and avoiding the problem of poor control accuracy of the outlet water temperature caused by the water pressure fluctuation.

[0012] A further setting of the present invention is that a first water pump trigger switch is provided at the top of the first box body. When the top of the second box body contacts the first water pump trigger switch, the communication area between the first water inlet and the second water inlet is zero. The height of the top inside the water collection tank is greater than the bottom plane height of the first water pump trigger switch. The first water pump trigger switch is connected to a pressure sensor fixed at the top of the first box body through a second spring.

[0013] By adopting the above technical solution, the first water pump trigger switch is used to control the intermittent start and stop of the first water pump while the second water pump continuously and stably starts when boiling water, and only the first water pump continuously starts when heating warm water, so as to ensure that the first water pump works intermittently with a large flow rate while the second water pump can stably send water into the water heater at a small flow rate for heating and boiling when in the boiling water mode, and keep the first water pump continuously starting to work with a large flow rate to send water into the water heater at a large flow rate for heating when heating warm water. That is, when boiling water, when the top of the first box body touches the first water pump trigger switch, since the first water inlet and the second water inlet cannot continue to intake water, the first box body will not continue to move upward, and the second spring will not continue to apply pressure to the pressure sensor. Therefore, according to the pressure sensor, the first water pump is controlled to close and the second water pump is started at the same time, avoiding damage to the first water pump due to the water in the first water inlet pipe not being able to be discharged. As the second water pump continues to work, the water in the first box body will be continuously pumped away, reducing the water pressure in the first box body. The first box body moves downward under the action of the first spring. Therefore, the top of the first box body gradually separates from the first water pump trigger switch. After separation, the first water pump starts again to replenish water into the first water tank until the top of the first box body touches the first water pump trigger switch again. This process repeats, ensuring that the first water pump works intermittently with a large flow rate while the second water pump can stably send water into the water heater at a small flow rate for heating and boiling. When heating warm water, when the top of the first box body touches the first water pump trigger switch, since the third water inlet can still continue to intake water, the pressure applied by the second spring to the pressure sensor continues to increase. Therefore, according to the pressure sensor, the first water pump is controlled to continue working, and the second water pump remains in the closed state. At this time, the first water pump sends water into the water heater at a large flow rate for heating. Due to the large flow rate, it can only be heated. The two modes are relatively independent, and the control process is simple and the design is ingenious.

[0014] A further setting of the present invention is that a one-way valve for preventing water from flowing back into the water collection tank is provided on the second water outlet pipe.

[0015] By adopting the above technical solution, the setting of the one-way valve is used to prevent the water from flowing back into the water collection tank through the second water outlet pipe while the second water pump starts and drives the water to enter the main water outlet pipe at a small flow rate from the first water outlet pipe when boiling water, thus causing the water flow into the main water outlet pipe to be too small and unstable. It can effectively avoid the situation of the water heater being dry burned due to the unstable water flow (interruption of water flow) in the main water outlet pipe, greatly improving the reliability and service life of the equipment.

[0016] A further setting of the present invention is that the water inlet pipe further includes a first water inlet pipe and a second water inlet pipe. The main water inlet pipe is connected to the water inlet of the first water pump, and the first water inlet pipe and the second water inlet pipe are connected to the water outlet of the first water pump through a three-way valve.

[0017] By adopting the above technical solution, the first water inlet pipe and the second water inlet pipe are respectively the water supply pipes for the second water inlet and the third water inlet. The three-way valve is used to control the water inlet of the first water inlet pipe or the second water inlet pipe, ensuring that only one of the first water inlet pipe and the second water inlet pipe can intake water. The water inlet of the first water inlet pipe is controlled by the water pressure in the first box body, and the second water inlet pipe can achieve continuous water supply to meet the different water supply requirements of boiling water, warm water, and cold water.

[0018] A further setting of the present invention is that the bottom plane of the inner cavity of the water collection tank is on the same horizontal plane as the bottom plane of the inner cavity of the second box body.

[0019] By adopting the above technical solution, the bottom plane of the water collection tank is on the same horizontal plane as the bottom plane of the inner cavity of the second box body, which can ensure that after the first water pump stops working, the water in the water collection tank can completely flow into the second box body, flow back to the second water inlet pipe from the third water inlet at the bottom of the second box body, enter the main water inlet pipe through the three-way valve via the second water inlet pipe, and return to the water storage tank through the main water inlet pipe. This enables the water heater to have no water accumulation inside the water collection tank and the second box body when not in operation, ensuring smooth and stable boiling or warming of water each time. Moreover, the water flowing back to the water storage tank is unheated, thus avoiding the problems of yin-yang water or thousand-roll water.

[0020] A further setting of the present invention is that the water heater includes an outer sleeve pipe and a heating rod located in the inner cavity of the outer sleeve pipe. A spiral heating water pipe is wound around the outer wall of the heating rod. The water inlet of the heating water pipe is connected to the water outlet of the main water outlet pipe, the water outlet of the heating water pipe is connected to a connecting pipe, the water inlet of the heating water pipe is located at the top of the outer sleeve pipe, and the water outlet of the heating water pipe is located at the bottom of the outer sleeve pipe.

[0021] By adopting the above technical solution, after the water in the main outlet pipe flows into the heating water pipe, as the heating water pipe spirally flows downward around the heating rod, heat transfer occurs between the flowing water and the heating rod during the flow process, thereby realizing boiling or heating the water. The spiral heating pipe increases the flow trajectory of the water, thereby prolonging the heat transfer time between the water flow and the heating pipe, thus improving the heating efficiency of the water and making it easier to boil the water. The water inlet is arranged at the top of the outer casing. At the same time, the spiral heating pipe also has a certain resistance to the water flow, effectively reducing the outflow speed of the water and avoiding the situation of splashing caused by too fast water flow speed and scalding people, effectively ensuring the safety during water receiving. In addition, the water outlet is arranged at the bottom of the outer casing, enabling the water in the water heater to be completely discharged without accumulating in the water heater, causing waste of hot water or boiling water or resulting in a poor user experience when continuously receiving cold water after receiving hot water or boiling water and still getting hot water or boiling water.

[0022] A further setting of the present invention is that: a heat insulation coating is provided on the inner wall of the outer casing.

[0023] By adopting the above technical solution, the setting of the heat insulation coating can effectively prevent the temperature loss in the water heater. On the one hand, it can ensure that the outlet water temperature is not affected by the external temperature environment. On the other hand, it can effectively save electric energy and ensure that the electric energy consumption is minimized on the basis of the outlet water temperature reaching the set value.

[0024] The beneficial effects of the present invention are:

[0025] 1. After starting the first water pump, the present invention pumps the water in the storage tank into the flow control device through the main inlet pipe. The flow control device controls the water to be discharged into the main outlet pipe from the first outlet pipe or the second outlet pipe according to the demand for boiling water, warm water or cold water, and discharges it into the water heater through the outlet pipe and heats it as needed. Since the flow rates of the first water pump and the second water pump are different, the flow control device controls the second water pump to pump the water into the first outlet pipe or still uses the first water pump as the power to pump the water into the second drain pipe, ensuring that the water flow rates entering the main outlet pipe from the first outlet pipe and the second outlet pipe are different. Thus, when boiling water is needed, a small flow rate enters the water heater from the main outlet pipe for heating; when warm water or cold water is needed, a large flow rate enters the water heater from the main outlet pipe for heating; when cold water is needed, a large flow rate enters the water heater and is directly discharged without heating. When the present invention discharges cold water, the water heater does not work. When boiling water and warm water are discharged, even if the water heater heats the water at the same power, it can be achieved. Therefore, without changing the power of the water heater, it has the effects of discharging boiling water and warm water, greatly simplifying the control process of the equipment and effectively reducing the equipment cost.

[0026] 2. The water collection tank in the present invention serves as a transition unit connecting the second box body with the first water outlet pipe and the second water outlet pipe, and is used to buffer the water entering the first water outlet pipe and the second water outlet pipe, ensuring that the water entering the first water outlet pipe and the second water outlet pipe is not affected by the fluctuation of the inlet water pressure. Thus, the water pressure stability entering the water heater is better, avoiding the problem of poor control accuracy of the outlet water temperature caused by water pressure fluctuation.

[0027] 3. In the present invention, a first water pump trigger switch is provided at the top of the first box body, which is used to control the intermittent start and stop of the first water pump while the second water pump continuously and stably operates when boiling water, and only the first water pump continuously operates when heating warm water. Thus, when in the boiling water mode, the first water pump works intermittently with a large flow rate while the second water pump can stably send water into the water heater for heating and boiling with a small flow rate, and when heating warm water, the first water pump continuously operates to continuously send water into the water heater for heating with a large flow rate. The two modes are relatively independent, and the control process is simple and ingeniously designed.

[0028] 4. In the present invention, the one-way valve is provided to prevent the water from flowing back into the water collection tank from the second water outlet pipe while flowing into the main water outlet pipe from the first water outlet pipe with a small flow rate under the drive of the second water pump after the second water pump starts when boiling water, thus avoiding the situation that the water flow into the main water outlet pipe is too small and unstable, and effectively preventing the dry burning of the water heater caused by the unstable water flow (interruption of water flow) in the main water outlet pipe, greatly improving the reliability and service life of the equipment.

[0029] 5. By making the bottom plane of the water collection tank be on the same horizontal plane as the bottom plane of the inner cavity of the second box body, it can ensure that after the first water pump stops working, the water in the water collection tank can completely flow into the second box body, flow back to the second water inlet pipe from the water inlet three at the bottom of the second box body, enter the main water inlet pipe through the second water inlet pipe and the three-way valve, and then flow back to the water storage tank through the main water inlet pipe. When the water heater is not working, there will be no water accumulation inside the water collection tank and the second box body, ensuring that each time boiling water or heating warm water can be carried out smoothly and stably. Moreover, the water flowing back to the water storage tank is not heated, so there will be no problem of yin-yang water or thousand-boiled water.

[0030] 6. In the heater of the present invention, a spiral heating water pipe is wound around the outer wall of the heating rod, so that the water entering the heater undergoes heat transfer with the heating rod during the flowing process, thereby achieving boiling or heating of the water. The spiral heating pipe increases the flow trajectory of the water, thus prolonging the heat transfer time between the water flow and the heating pipe, improving the heating efficiency of the water, making it easier to boil the water. The water inlet is arranged at the top of the outer casing. At the same time, the spiral heating pipe also has a certain resistance to the water flow, effectively reducing the outflow speed of the water, avoiding the situation of splashing caused by too fast water flow speed and scalding people, and effectively ensuring the safety during water receiving. In addition, the water outlet is arranged at the bottom of the outer casing, so that the water in the water heater can be completely discharged without accumulating in the water heater, causing waste of hot water or boiling water, or the situation of still discharging hot water or boiling water when continuously receiving cold water after receiving hot water or boiling water, resulting in poor user experience.

[0031] 7. By providing a heat insulation coating on the inner wall of the outer casing, the present invention can effectively prevent the temperature loss in the water heater. On the one hand, it can ensure that the outlet water temperature is not affected by the external temperature environment. On the other hand, it can effectively save electric energy and ensure that the electric energy consumed is minimized on the basis of the outlet water temperature reaching the set value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 It is the structural schematic diagram of an instant-on water heater of the present invention.

[0034] In the figure, 1, water heater; 11, outer casing; 12, heating rod; 13, heating water pipe; 2, water inlet pipe; 21, main water inlet pipe; 22, first water inlet pipe; 23, second water inlet pipe; 24, three-way valve; 3, water storage tank; 4, first water pump; 5, water outlet flow control device; 51, first box body; 52, second box body; 53, through hole; 54, first water inlet; 55, second water inlet; 56, first spring; 57, third water inlet; 6, water outlet adjustment device; 61, main water outlet pipe; 62, first water outlet pipe; 63, second water outlet pipe; 64, second water pump; 65, fourth water inlet; 66, water collection tank; 67, connecting water pipe; 68, check valve; 7, water connection pipe; 8, first water pump trigger switch; 9, second spring; 10, pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0036] As Figure 1 shown, an instant water heater includes a water heater 1 and a water inlet pipe 2. The water inlet pipe 2 includes a water inlet main pipe 21 connected to a water storage tank 3. One end of the water inlet main pipe 21 is connected to the water storage tank 3, and the other end of the water inlet main pipe 21 is connected to a water outlet flow control device 5 through a first water pump 4. The water outlet flow control device 5 is connected to the water heater 1 through a water outlet adjustment device 6. The water outlet adjustment device 6 includes a water outlet main pipe 61, a first water outlet pipe 62, and a second water outlet pipe 63. One end of the water outlet main pipe 61 is connected to the water inlet of the water heater 1, and the other end of the water outlet main pipe 61 is connected to one ends of the first water outlet pipe 62 and the second water outlet pipe 63. The other end of the first water outlet pipe 62 is connected to the water outlet flow control device 5 through a second water pump 64, and the other end of the second water outlet pipe 63 is directly connected to the water outlet flow control device 5. The flow rate of the first water pump 4 is greater than the flow rate of the second water pump 64.

[0037] Specifically, the water outlet flow control device 5 includes a first box body 51 and a second box body 52. The first box body 51 is located in the inner cavity of the second box body 52. The bottom of the first box body 51 is an open receiving cavity, and the second box body 52 is a sealed receiving cavity. A through hole 53 is provided at the top of the second box body 52, and a third water inlet 57 is provided at the bottom of the second box body 52. The outer wall of the first box body 51 and the inner wall of the second box body 52 are in sealing cooperation. The first box body 51 can slide up and down in the inner cavity of the second box body 52. A first water inlet 54 and a second water inlet 55 are respectively provided on the same side of the first box body 51 and the second box body 52. A first spring 56 is provided at the bottom of the first box body 51. The upper end of the first spring 56 is connected to the first box body 51, and the lower end of the first spring 56 is connected to the second box body 52.

[0038] Furthermore, the water outlet adjustment device 6 further includes a water collection tank 66. A fourth water inlet 65 is provided at the bottom of the water collection tank 66. The fourth water inlet 65 at the bottom of the water collection tank 66 is communicated with the third water inlet 57 at the bottom of the second box body 52 through a connecting water pipe 67.

[0039] Further, a first water pump trigger switch 8 is provided at the top of the first box body 51. When the top of the second box body 52 contacts the first water pump trigger switch 8, the communication area between the first water inlet 54 and the second water inlet 55 is zero. The height of the top inside the water collecting tank 66 is greater than the height of the bottom plane of the first water pump trigger switch 8. The first water pump trigger switch 8 is connected to a pressure sensor 10 fixed at the top of the first box body 51 through a second spring 9.

[0040] Further, a one-way valve 68 for preventing water from flowing back into the water collecting tank 66 is provided on the second water outlet pipe 63.

[0041] Further, the water inlet pipe 2 further includes a first water inlet pipe 22 and a second water inlet pipe 23. The main water inlet pipe 21 is connected to the water inlet of the first water pump 4. The first water inlet pipe 22 and the second water inlet pipe 23 are connected to the water outlet of the first water pump 4 through a three-way valve 24.

[0042] Further, the bottom plane inside the water collecting tank 66 and the bottom plane inside the second box body 52 are on the same horizontal plane.

[0043] Specifically, the water heater 1 includes an outer sleeve 11 and a heating rod 12 located inside the outer sleeve 11. A spiral heating water pipe 13 is wound around the outer wall of the heating rod 12. The water inlet of the heating water pipe 13 is connected to the water outlet of the main water outlet pipe 61. The water outlet of the heating water pipe 13 is connected to the connecting pipe 7. The water inlet of the heating water pipe 13 is located at the top of the outer sleeve 11, and the water outlet of the heating water pipe 13 is located at the bottom of the outer sleeve 11.

[0044] Further, a heat insulation coating is provided on the inner wall of the outer sleeve 11.

[0045] Working principle of the present invention: When it is necessary to boil water, the three-way valve 24 is opened, so that the end of the three-way valve 24 connected to the main water inlet pipe 21 and the first water inlet pipe 22 is opened, and the end connected to the second water inlet pipe 23 is closed. Then, the first water pump 4 is started to supply water to the main water inlet pipe 21. The water in the main water inlet pipe 21 directly enters the inner cavity of the first box body 51 through the second water inlet 55 and the first water inlet 54. When the water inflow reaches a certain amount, under the action of water pressure, the first box body 51 moves upward against the elastic force of the first spring 56, so that the communication area between the first water inlet 54 and the second water inlet 55 gradually decreases until the communication area between the first water inlet 54 and the second water inlet 55 is zero. At this time, neither the first water inlet 54 of the first box body 51 nor the second water inlet 55 of the second box body 52 can intake water, and the top of the first box body 51 no longer moves upward after touching the trigger switch 8 of the first water pump. Therefore, the pressure applied by the second spring 9 to the pressure sensor 10 will not increase any more. At this time, the pressure sensor 10 controls the first water pump 4 to close and the second water pump 64 to start. At this time, the water in the water collection tank 66 can only enter the main water outlet pipe 61 from the first water outlet pipe 62 under the drive of the second water pump 64 in a small flow rate and enter the water heater 1 for heating. Because the flow rate is small, it can be boiled quickly. The boiled water directly flows out from the water connection pipe 7 below the water heater 1. After receiving the boiled water, the second water pump 64, the water heater 1, and the end of the three-way valve 24 connected to the main water inlet pipe 21 are closed simultaneously, and the end of the three-way valve 24 connected to the second water inlet pipe 23 is opened simultaneously. The water in the water collection tank 66 no longer enters the main water outlet pipe 61 from the first water outlet pipe 62. At this time, the water heater 1 no longer discharges water, and the unused water in the water collection tank 66 enters the second box body 52 under its own gravity and flows back to the main water inlet pipe 21 from the third water inlet 57 at the bottom of the second box body 52, and then flows back to the water storage tank 3 through the main water inlet pipe 21. The water flowing back to the water storage tank 3 is not heated, so there will be no problem of yin-yang water or thousand-rolling water;

[0046] When only hot water is needed, open the three-way valve 24 so that the end of the three-way valve 24 connected to the second water inlet pipe 23 and the end connected to the main water inlet pipe 21 are opened, and the end connected to the first water inlet pipe 22 is closed. Then start the first water pump 4 to intake water from the third water inlet 57 at the bottom of the second box body 52. When the water intake reaches a certain level, under the action of water pressure, the first box body 51 moves upward against the elastic force of the first spring 56. When the top of the first box body 51 touches the trigger switch 8 of the first water pump, since the third water inlet 57 can still continue to intake water, the pressure exerted by the second spring 9 on the pressure sensor 10 continues to increase. Therefore, according to the pressure sensor 10, the first water pump 4 continues to work, and the second water pump 64 remains in the closed state. At this time, as the first box body 51 continues to move upward until it abuts against the top of the second box body 52, the first box body 51 stops moving upward. At this time, as the third water inlet 57 continues to intake water, the water pressure in the first box body 51 gradually increases. As the water pressure in the first box body 51 increases, the water in the first box body 51 directly enters the main water outlet pipe 61 from the two pipes of the first water outlet pipe 62 and the second water outlet pipe 63 at a large flow rate and enters the water heater through the main water outlet pipe 61 for heating. Due to the large flow rate, it is difficult to boil the water during the heating process, and it can only flow out in the form of warm water;

[0047] When only cold water is needed, the water entering the main water outlet pipe 61 from the two pipes of the first water outlet pipe 62 and the second water outlet pipe 63 can directly be discharged without passing through the water heater 1 after entering the water heater 1. The setting of the through hole 53 at the top of the second box body 52 keeps the pressure at the upper end of the second box body 52 constant all the time, thus ensuring that the first box body 51 can smoothly slide up and down along the inner wall of the second box body 52, making the reliability of the water outlet flow control process better.

Claims

1. An instant hot water dispenser, characterized in that: It includes a water heater (1) and a water inlet pipe (2). The water inlet pipe (2) includes a main water inlet pipe (21) connected to a water storage tank (3). One end of the main water inlet pipe (21) is connected to the water storage tank (3), and the other end of the main water inlet pipe (21) is connected to a water outlet flow control device (5) through a first water pump (4). The water outlet flow control device (5) is connected to the water heater (1) through a water outlet regulating device (6). The water outlet regulating device (6) includes a main water outlet pipe (61), a first water outlet pipe (62), and a second water outlet pipe (63). One end of the main water outlet pipe (61) is connected to the water inlet of the water heater (1), and the other end of the main water outlet pipe (61) is connected to one ends of the first water outlet pipe (62) and the second water outlet pipe (63); The water outlet flow control device (5) includes a first box body (51) and a second box body (52). The first box body (51) is located in the inner cavity of the second box body (52). The bottom of the first box body (51) is an open receiving cavity. The second box body (52) is a sealed receiving cavity. A through hole (53) is provided at the top of the second box body (52). An inlet three (57) is provided at the bottom of the second box body (52). The outer wall of the first box body (51) is in sealed cooperation with the inner wall of the second box body (52). The first box body (51) can slide up and down along the inner cavity of the second box body (52). An inlet one (54) and an inlet two (55) are respectively provided on the same side of the first box body (51) and the second box body (52). A first spring (56) is provided at the bottom of the first box body (51). The upper end of the first spring (56) is connected to the first box body (51), and the lower end of the first spring (56) is connected to the second box body (52); The water outlet regulating device (6) further includes a water collection tank (66). An inlet four (65) is provided at the bottom of the water collection tank (66). The inlet four (65) at the bottom of the water collection tank (66) is communicated with the inlet three (57) at the bottom of the second box body (52) through a connecting water pipe (67); The other end of the first water outlet pipe (62) is communicated with the water collection tank (66) through a second water pump (64). The other end of the second water outlet pipe (63) is directly communicated with the water collection tank (66). The flow rate of the first water pump (4) is greater than the flow rate of the second water pump (64).

2. The instant water heater according to claim 1, characterized in that: A first water pump trigger switch (8) is provided at the top of the first box body (51). When the top of the second box body (52) contacts the first water pump trigger switch (8), the communication area between the inlet one (54) and the inlet two (55) is zero. The height of the top of the inner cavity of the water collection tank (66) is greater than the bottom plane height of the first water pump trigger switch (8). The first water pump trigger switch (8) is connected to a pressure sensor (10) fixed at the top of the first box body (51) through a second spring (9).

3. The instant water heater according to claim 1, characterized in that: A check valve (68) for preventing water from flowing back to the water collection tank (66) is provided on the second water outlet pipe (63).

4. The instant hot water dispenser according to claim 1, wherein: The water inlet pipe (2) further includes a first water inlet pipe (22) and a second water inlet pipe (23). The main water inlet pipe (21) is connected to the water inlet of the first water pump (4), and the first water inlet pipe (22) and the second water inlet pipe (23) are connected to the water outlet of the first water pump (4) through a three-way valve (24).

5. The instant water heater according to claim 1, characterized in that: The bottom plane of the inner cavity of the water collection tank (66) is on the same horizontal plane as the bottom plane of the inner cavity of the second box body (52).

6. The instant hot water dispenser according to claim 1, wherein: The water heater (1) includes an outer sleeve (11) and a heating rod (12) located in the inner cavity of the outer sleeve (11). A spiral heating water pipe (13) is wound around the outer wall of the heating rod (12). The water inlet of the heating water pipe (13) is connected to the water outlet of the main water outlet pipe (61), and the water outlet of the heating water pipe (13) is connected to a connecting water pipe (7). The water inlet of the heating water pipe (13) is located at the top of the outer sleeve (11), and the water outlet of the heating water pipe (13) is located at the bottom of the outer sleeve (11).

7. The instant hot water dispenser according to claim 6, characterized in that: An insulating coating is provided on the inner wall of the outer sleeve (11).

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