CN210165559U

CN210165559U - Intelligent water purifying and heating water heater

Info

Publication number: CN210165559U
Application number: CN201920725093.2U
Authority: CN
Inventors: 陈洪生
Original assignee: Zhengzhou Yuelong Electronic Technology Co Ltd
Current assignee: Zhengzhou Yuelong Electronic Technology Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-03-20
Anticipated expiration: 2029-05-21

Abstract

The utility model discloses an intelligence water purification heating water heater. The water purifier injects purified water into the hot water tank through a water pipe, a valve and a flowmeter are arranged on the water pipe, the controller measures the injected purified water through the flowmeter, a temperature sensor and a low water level sensor are arranged in the hot water tank, when the low water level sensor measures that the water level in the hot water tank is lower than the lower limit of the water level, the valve is opened, the single water injection amount injected into the hot water tank is measured through the flowmeter, and when the single water injection amount reaches a set threshold value, the valve is closed to finish single water injection; the heater heats water in the hot water tank, and when the temperature sensor measures that the water temperature reaches a set temperature value, the heater stops heating to finish single heating; after repeated single water injection and single heating, the water in the hot water tank is full and reaches a set temperature value. The utility model discloses reduce the consumption of water heater, improved the security that the water heater used.

Description

Intelligent water purifying and heating water heater

Technical Field

The utility model relates to a water heater technical field especially relates to an intelligence water purification heating water heater.

Background

In public places such as schools, hospitals and the like, there are water heaters with large volume and capacity, in the prior art, when heating such water heaters, tap water or filtered purified water needs to be injected into a hot water tank first, and then continuous heating is performed until boiling, so that the power consumption of the heating process is large, the heater is also easily damaged, and therefore, the power consumption of the water heater needs to be reduced, and the use safety of the water heater needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides an intelligence water purification heating water heater, solve the problem that the long-time continuous heating of water heater brought the consumption is big, the high, the potential safety hazard of existence among the prior art.

In order to solve the technical problem, the utility model adopts a technical scheme that an intelligent water purifying and heating water heater is provided, which comprises a water purifier, a controller, a hot water tank and a heater, wherein the water purifier is connected with the hot water tank through a water pipe, the water purifier injects purified water into the hot water tank through the water pipe, the water pipe is provided with a valve and a flowmeter, the on-off state of the valve is controlled by the controller, the controller measures the injected purified water through the flowmeter, a temperature sensor for measuring water temperature and a low water level sensor for measuring the lower limit of the water level are arranged in the hot water tank, the temperature sensor and the low water level sensor are both electrically connected with the controller, and the heater is also electrically connected with the controller;

when the low water level sensor measures that the water level in the hot water tank is lower than the lower limit of the water level, the controller controls the valve to be opened, measures the single water injection amount injected into the hot water tank through the flowmeter, and controls the valve to be closed to finish single water injection when the single water injection amount reaches a set threshold value; the controller controls the heater to heat water in the hot water tank, and when the temperature sensor measures that the water temperature reaches a set temperature value, the controller controls the heater to stop heating to finish single heating; and after the single water injection and the single heating are repeated for multiple times, the water injection heating process is completed until the water in the hot water tank is full and reaches a set temperature value.

Preferably, a high water level sensor for measuring an upper limit of a water level is further arranged in the hot water tank, and when the high water level sensor detects that the water level in the hot water tank reaches the upper limit of the water level, the controller controls the valve to be closed and stops water injection.

Preferably, the controller comprises a water injection valve control circuit, a water injection quantity detection circuit, a low water level detection circuit, a high water level detection circuit, a heating control circuit, a water temperature detection circuit and a singlechip which is respectively and electrically connected with the circuits, and a power supply circuit for supplying power to the circuits and the singlechip, wherein the water injection valve control circuit is used for controlling a valve for injecting water to the hot water tank to be opened or closed, the water injection amount detection circuit is used for detecting the amount of water injected into the hot water tank by the flowmeter, the low water level detection circuit and the high water level detection circuit are respectively and electrically connected with the low water level sensor and the high water level sensor, used for detecting the low water level and the high water level in the hot water tank, the heating control circuit is used for controlling the heater to open or close the heating of the water in the hot water tank, the water temperature detection circuit is electrically connected with the temperature sensor and is used for detecting the temperature of water in the hot water tank.

Preferably, the power circuit comprises a chip XL1509-5V, the input end of the chip XL1509-5V is connected with an external direct current power supply, the output end of the chip XL1509-5V is connected with the cathode of an output protection diode, the anode of the output protection diode is grounded, meanwhile, the output end of the chip XL1509-5V is also connected with an inductor, the other end of the inductor is connected with the anode of a first polarity capacitor, the cathode of the first polarity capacitor is grounded, the anode of the first polarity capacitor is also electrically connected with the feedback end of the chip XL1509-5V, the switch end of the chip XL1509-5V is grounded, and other pin ends of the chip XL1509-5V are grounded; the positive pole of the first polarity capacitor is connected with the positive pole of the first diode, the negative pole of the first diode is connected with the positive pole of the second diode, the negative pole of the second diode is connected with the power supply current-limiting resistor, and the other end of the power supply current-limiting resistor provides a +4V power supply for the single chip microcomputer to supply power.

Preferably, the low water level detection circuit and the high water level detection circuit are the same in composition, wherein the high water level detection circuit comprises a high water level detection first divider resistor and a high water level detection second divider resistor, an electric connection part between the high water level detection first divider resistor and the high water level detection second divider resistor is electrically connected with the high water level detection sensor and is also electrically connected with one end of a high water level detection current-limiting resistor, and the other end of the high water level detection current-limiting resistor is electrically connected with one input/output end of the single chip microcomputer as a high water level detection signal input end; the other end of the high water level detection first divider resistor is used as a high water level detection control end and is electrically connected with the other input/output end of the single chip microcomputer, when the high water level detection control end generates high voltage, the single chip microcomputer collects the signal voltage of the high water level detection signal input end, and the other end of the high water level detection second divider resistor is grounded.

Preferably, the water injection valve control circuit comprises an MOS tube STU432, the external direct-current power supply is connected with a cathode of a power supply protection diode, an anode of the power supply protection diode is connected with a drain of the MOS tube STU432, and a capacitor is connected in parallel between the anode and the cathode of the power supply protection diode; the drain electrode of the MOS tube STU432 is used as a control end of the water injection valve and is electrically connected with one terminal of the water injection valve, and the other terminal of the water injection valve is electrically connected with an external direct-current power supply; the source electrode of the MOS tube STU432 is grounded; the grid of the MOS tube STU432 is electrically connected with one input end and one output end of the singlechip through an electrically connected water injection control current-limiting resistor.

Preferably, the water injection amount detection circuit comprises a flow detection interface, wherein a first terminal is connected with a +4V power supply and used for supplying power to the flowmeter; the second wiring end is electrically connected with one end of a flow detection current-limiting resistor, the other end of the flow detection current-limiting resistor is electrically connected with one input end and one output end of the single chip microcomputer as a water injection amount detection signal input end, and the water injection amount detection signal input end is also connected with a capacitor in parallel and then grounded; the third terminal is also connected to ground.

Preferably, the heating control circuit comprises a heating relay, the positive control end of the heating relay is electrically connected with an external direct-current power supply, the negative control end of the heating relay is electrically connected with the collector of a heating control triode, the emitter of the heating control triode is grounded, the base is electrically connected with a first heating current-limiting resistor and then is connected to one input/output end of the single chip microcomputer, and a second heating current-limiting resistor is further connected between the base and the emitter of the heating control triode; one controlled end of the heating relay is electrically connected with a live wire end of external alternating current, and the other controlled end of the heating relay is electrically connected with a live wire end of alternating current of the heater.

The utility model has the advantages that: the utility model discloses an intelligence water purification heating water heater. The water purifier injects purified water into the hot water tank through a water pipe, a valve and a flowmeter are arranged on the water pipe, the controller measures the injected purified water through the flowmeter, a temperature sensor and a low water level sensor are arranged in the hot water tank, when the low water level sensor measures that the water level in the hot water tank is lower than the lower limit of the water level, the valve is opened, the single water injection amount injected into the hot water tank is measured through the flowmeter, and when the single water injection amount reaches a set threshold value, the valve is closed to finish single water injection; the heater heats water in the hot water tank, and when the temperature sensor measures that the water temperature reaches a set temperature value, the heater stops heating to finish single heating; after repeated single water injection and single heating, the water in the hot water tank is full and reaches a set temperature value. The utility model discloses reduce the consumption of water heater, improved the security that the water heater used.

Drawings

FIG. 1 is a block diagram of an embodiment of an intelligent water purifying and heating water heater according to the present invention;

FIG. 2 is a block diagram of the controller according to an embodiment of the intelligent water purifying and heating water heater of the present invention;

FIG. 3 is a power circuit of another embodiment of the intelligent water heater according to the present invention;

FIG. 4 is a circuit of a single chip microcomputer chip in another embodiment of the intelligent water heater;

fig. 5 is a high water level detection circuit in another embodiment of the intelligent water purifying and heating water heater according to the present invention;

fig. 6 is a water injection valve control circuit in another embodiment of the intelligent water purifying and heating water heater according to the present invention;

FIG. 7 is a circuit for detecting water injection amount in another embodiment of the intelligent water purifying and heating water heater according to the present invention;

fig. 8 is a heating control circuit in another embodiment of the intelligent purified water heating water heater according to the present invention;

fig. 9 is a water temperature detection circuit in another embodiment of the intelligent purified water heating water heater according to the present invention;

fig. 10 is an alarm circuit in another embodiment of the intelligent water purifying and heating water heater according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the intelligent purified water heating water heater includes a water purifier S1, a controller S2, a hot water tank S4 and a heater S3, the water purifier S1 is connected to the hot water tank S4 through a water pipe, the water purifier S1 injects purified water into the hot water tank S4 through the water pipe, a valve S5 and a flowmeter S6 are arranged on the water pipe, the opening and closing state of the valve S5 is controlled by the controller S2, the controller S2 meters the injected purified water by the flow meter S6, a temperature sensor S7 for measuring the temperature of the water and a low water level sensor S8 for measuring the lower limit of the water level are provided in the hot water tank S4, a low water level sensor S8 is provided on a side wall near the bottom surface of the hot water tank S4, the temperature sensor S7 and the low water level sensor S8 are both electrically connected to the controller S2, and the heater S3 is also electrically connected to the controller S2.

When the low water level sensor S8 detects that the water level in the hot water tank S4 is lower than the lower limit of the water level, the controller S2 controls the valve S5 to be opened, the single water injection amount injected into the hot water tank S4 is measured through the flowmeter S6, and when the single water injection amount reaches the set single water injection amount value, the controller S2 controls the valve S5 to be closed to complete the single water injection; the controller S2 controls the heater S3 to heat the water in the hot water tank S4, and when the temperature measured by the temperature sensor S8 reaches the upper limit of the set temperature, the controller S2 controls the heater S3 to stop heating, thereby completing single heating; and after the single water injection and the single heating are repeated for multiple times, the water injection and heating process is completed until the water in the hot water tank S4 is full and reaches the set upper limit value of the temperature.

It can be seen that above-mentioned intelligent water purification heating water heater can not make the long-time continuous operation of heater when heating through the mode of controlling single water injection volume and single heating, but heat for a long time at every turn and need not longer just can make the temperature of single water injection heated to the temperature value of settlement. After the purified water is injected again, the temperature of the water cannot drop too much after the newly injected purified water is mixed with the hot water in the hot water tank, so that the reheating duration of the water heater cannot be too long, and the temperature of the water caused by single water injection drops less along with the increase of the water amount in the hot water tank, so that the heating duration of the water heater is shortened. Preferably, in order to enable the water temperature to be more reasonably detected, a plurality of temperature sensors can be arranged at the bottom, the upper part and the middle part of the hot water tank, so that the water temperature can be more accurately measured.

Preferably, a high water level sensor S9 for measuring an upper limit of a water level is further provided in the hot water tank S4, and the high water level sensor S9 is provided on a side wall near the top surface of the hot water tank S4. When the high water level sensor detects that the water level in the hot water tank S4 reaches the upper limit of the water level during the water supply to the hot water tank S4, the controller S2 controls the valve S5 to be closed to stop the water supply.

Further preferably, an intermediate water level sensor can be arranged in the middle of the hot water tank, when the hot water tank is used after being filled with water, along with the reduction of the water level, when the water level is reduced to the position of the intermediate water level sensor, the intermediate water level sensor can detect the water level condition, then the single water injection and single heating process can be started, and therefore the hot water in the hot water tank can be guaranteed to be always above half of the capacity of the water tank.

As shown in fig. 2, the controller includes a water injection valve control circuit 2, a water injection amount detection circuit 3, a low water level detection circuit 4, a high water level detection circuit 9, a heating control circuit 5, a water temperature detection circuit 6, and a single chip microcomputer 1 electrically connected to these circuits, respectively, and a power supply circuit 7 for supplying power to these circuits and the single chip microcomputer, the water injection valve control circuit 2 is used to control a valve S5 for opening or closing water injection to a hot water tank S4 in fig. 1, the water injection amount detection circuit 3 is used to detect the amount of water injected into the hot water tank S4 through a flow meter S6 in fig. 1, the low water level detection circuit 4 and the high water level detection circuit 9 are electrically connected to a low water level sensor S7 and a high water level sensor S9 in fig. 1, respectively, for detecting a low water level and a high water level in a hot water tank S4, the heating control circuit 5 is used to control a heater S3 in fig. 1 to open or close heating of, the water temperature detection circuit 6 is electrically connected to the temperature sensor S8 and is used for detecting the temperature of the water in the hot water tank S4. The power supply circuit 7 is connected to an external power supply 8.

As shown IN fig. 3 and 4, the power circuit includes a chip XL1509-5V, the single chip microcomputer is a chip STC8A4K32S2a12, an input terminal IN of the chip XL1509-5V is connected to an external dc power supply +24V, an output terminal OUT is connected to a negative electrode of an output protection diode D6, an anode of the output protection diode D6 is grounded, meanwhile, the output terminal OUT is further connected to an inductor L1, another terminal of the inductor L1 is connected to an anode of a first polarity capacitor C3, a negative electrode of the first polarity capacitor C3 is grounded, an anode of the first polarity capacitor C3 is further electrically connected to a feedback terminal FB 1509-5V, a switch terminal ON/OFF of the chip XL1509-5V is grounded, and other pin terminals of the chip XL1509-5V are grounded; the positive electrode of the first polar capacitor C3 is connected with the positive electrode of a first diode D1, the negative electrode of the first diode D1 is connected with the positive electrode of a second diode D2, the negative electrode of the second diode D2 is connected with a power supply current-limiting resistor R6, and the other end of the power supply current-limiting resistor R6 is provided for a +4V power supply for supplying power to the single chip microcomputer.

Preferably, an input end IN of the chip XL1509-5V is connected with the thermistor RT1 and then connected with the cathode of the protection diode D4, the anode of the protection diode D4 is connected with an external power supply +24V, meanwhile, the input end IN of the chip XL1509-5V is also connected with the anode of the polar capacitor C1, the cathode of the polar capacitor C1 is grounded, and the input end IN of the chip XL1509-5V is also connected with the capacitor C2 and then grounded. The positive electrode of the first polar capacitor C3 is also connected with the positive electrode of the polar capacitor C4, the negative electrode of the polar capacitor C4 is grounded, and the protection diode D4 plays a role in protecting the chip XL 1509-5V.

Fig. 5 is a circuit composition of a high water level detection circuit, the low water level detection circuit has the same composition as the high water level detection circuit, in fig. 5, the high water level detection circuit includes a high water level detection first voltage-dividing resistor R63 and a high water level detection second voltage-dividing resistor R67, an electrical connection between the high water level detection first voltage-dividing resistor R63 and the high water level detection second voltage-dividing resistor R67 is electrically connected to a high water level detection sensor, and is also electrically connected to one end of a high water level detection current-limiting resistor R42, and the other end gyh _ in of the high water level detection current-limiting resistor R42 is electrically connected as a high water level detection signal input end to one input and output ends of a single chip microcomputer; the other end gy _ vcc of the high water level detection first voltage-dividing resistor R63 is used as a high water level detection control end and is electrically connected with the other input/output end of the single chip microcomputer, when the high water level detection control end generates high voltage, the single chip microcomputer collects the signal voltage of the high water level detection signal input end, and the other end of the high water level detection second voltage-dividing resistor R67 is grounded. Preferably, a capacitor C23 is connected in parallel to both ends of the high water level detection second voltage-dividing resistor R67. The low water level detection circuit is identical in composition to the high water level detection circuit and will not be described herein.

Preferably, when the water level detection sensor is a metal probe, the metal probe corresponds to an open circuit when it is not immersed in water, and when it is immersed in water, the metal probe exhibits a capacitance characteristic due to a high purity of water. If a fixed voltage value is applied to the water level detection control end, the water level detection signal input end always adopts the voltage division value of the water level detection first voltage division resistor and the water level detection second voltage division resistor to the fixed voltage value, and the metal probe can not be identified as being immersed or not immersed. Preferably, the water level detection control terminal applies a pulse signal, when the pulse signal is a high voltage, the pulse signal is equivalent to charging the metal probe with the capacitance characteristic, when the pulse signal is a low voltage, the pulse signal is equivalent to discharging the metal probe with the capacitance characteristic, a continuous charging and discharging process is formed, and the water level detection signal input terminal acquires the voltage signal at a certain time of the duration of the high voltage pulse. Therefore, if the metal probe is not immersed in water, the voltage acquired by the water level detection signal input end is the voltage division value of the water level detection first voltage division resistor and the water level detection second voltage division resistor to the fixed voltage value, and if the metal probe is immersed in water, the voltage acquired by the water level detection signal input end is based on one voltage value in the charging process of the metal probe, and the voltage value is different from the fixed voltage division value by reasonably selecting the sampling time or selecting more voltage values at several sampling times. In addition, energy consumption is also saved by applying such a pulse signal instead of applying a fixed voltage value.

As shown in fig. 6, the water injection valve control circuit includes a MOS transistor STU432, the external dc power supply +24V is connected to the cathode of a power supply protection diode D8, the anode of the power supply protection diode D8 is connected to the drain of the MOS transistor STU432, and a capacitor C15 is connected in parallel between the anode and the cathode of the power supply protection diode D8; the drain electrode of the MOS tube STU432 is used as a control end of a water injection valve and is electrically connected with one terminal of the water injection valve, and the other terminal of the water injection valve is electrically connected with +24V of an external direct-current power supply; the source electrode of the MOS tube STU432 is grounded; the gate of the MOS transistor STU432 is electrically connected to the input/output end P7.2 of the chip microcomputer in fig. 4 through an electrically connected water injection control current limiting resistor R48.

As shown in fig. 7, the water injection amount detection circuit includes a flow rate detection interface J6, wherein a first terminal is connected to a +4V power supply for supplying power to the flowmeter, and the first terminal is further connected to a capacitor C10 and then grounded; the second terminal is electrically connected with one end of a flow detection current-limiting resistor R33, the other end of the flow detection current-limiting resistor R33 is used as a water injection quantity detection signal input end and is electrically connected with the flow input and output end P3.4/T0 of the singlechip in fig. 4, and the water injection quantity detection signal input end is also connected with a capacitor C11 in parallel and then is grounded; the third terminal is also connected to ground.

It can be seen that the flowmeter is always in a power supply state by a +4V power supply, when water injection flows through the flowmeter, a pulse signal can be input to the flow input and output end P3.4/T0 of the single chip microcomputer through the second terminal, the single chip microcomputer counts pulses in the pulse signal, the single number of M pulses indicates the single water injection amount, and the accumulated number of the pulses indicates the water injection amount. The water filling in the hot water tank can be measured and accumulated through the detection of a flow meter.

As shown in fig. 8, the heating control circuit includes a heating relay, a positive control terminal of the heating relay is electrically connected to +24V of an external dc power supply, a negative control terminal of the heating relay is electrically connected to a collector of a heating control transistor Q3, an emitter of the heating control transistor Q3 is grounded, a base is electrically connected to a first heating current-limiting resistor R47 and then connected to an input/output terminal P7.3 of the monolithic computer in fig. 4, and a second heating current-limiting resistor R53 is further connected between the base and the emitter of the heating control transistor Q3; one controlled end of the heating relay is electrically connected with a live wire end L of external alternating current, and the other controlled end of the heating relay is electrically connected with a live wire end L _ OUT of the alternating current of the heater.

Preferably, the positive control end of the heating relay is further electrically connected to the positive electrode of a heating protection diode D7, the negative electrode of the heating protection diode D7 is connected to the collector of the heating control triode Q3, and a capacitor C14 is further connected between the negative electrode and the positive electrode of the heating protection diode D7.

It can be seen that after the input/output end P7.3 of the single chip outputs a high voltage signal, the heating control triode Q3 is turned on through the first heating current-limiting resistor R47, so that the two controlled ends of the heating relay are electrically connected, and the heater is switched in with an alternating voltage to start heating.

As shown in fig. 9, the water temperature detection circuit includes a temperature sensor J2, one end of the temperature sensor is connected to the +4V power supply, the other end of the temperature sensor is electrically connected to the input/output end P0.0 of the chip microcomputer in fig. 3 as a temperature detection signal acquisition end, and the temperature detection signal acquisition end wd _ ad is also electrically connected to a temperature detection voltage-dividing resistor R21 and then grounded.

It can be seen that the temperature sensor is always in a power supply state by a +4V power supply and is used for detecting the water temperature in the hot water tank, a temperature signal can be input to the input/output end P0.0 of the single chip microcomputer through the temperature detection signal acquisition end wd _ ad, and the heating power of the hot water tank after water is injected each time is controlled through the single chip microcomputer.

As shown in fig. 10, the alarm circuit electrically connected to the single chip microcomputer is further included, the alarm circuit includes a buzzer B1, a first terminal of the buzzer B1 is electrically connected to an external dc power supply +24V through a first alarm current limiting resistor R45, a second terminal of the buzzer B1 is further electrically connected to a collector of the alarm control triode Q4, an emitter of the alarm control triode Q4 is grounded, a second alarm current limiting resistor R62 is further electrically connected between an emitter and a base of the alarm control triode Q4, and a base of the alarm triode Q4 is connected to the third alarm current limiting resistor R52 and then connected to an alarm input/output terminal P6.5 of the single chip microcomputer in fig. 4.

Preferably, a first terminal of the buzzer B1 is connected with a negative electrode of an alarm protection diode D12, and a second terminal of the buzzer B1 is connected with a positive electrode of the alarm protection diode D12.

When the water level in the heater is at a low water level, the alarm input and output end P6.5 of the single chip microcomputer outputs high voltage, so that the alarm control triode Q4 is conducted, and the buzzer B1 obtains +24V voltage to start alarm prompt.

Therefore, the utility model discloses an intelligence water purification heating water heater. The water purifier injects purified water into the hot water tank through a water pipe, a valve and a flowmeter are arranged on the water pipe, the controller measures the injected purified water through the flowmeter, a temperature sensor and a low water level sensor are arranged in the hot water tank, when the low water level sensor measures that the water level in the hot water tank is lower than the lower limit of the water level, the valve is opened, the single water injection amount injected into the hot water tank is measured through the flowmeter, and when the single water injection amount reaches a set threshold value, the valve is closed to finish single water injection; the heater heats water in the hot water tank, and when the temperature sensor measures that the water temperature reaches a set temperature value, the heater stops heating to finish single heating; after repeated single water injection and single heating, the water in the hot water tank is full and reaches a set temperature value. The utility model discloses reduce the consumption of water heater, improved the security that the water heater used.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.

Claims

1. An intelligent water purifying and heating water heater is characterized by comprising a water purifier, a controller, a hot water tank and a heater, wherein the water purifier is connected with the hot water tank through a water pipe, the water purifier injects purified water into the hot water tank through the water pipe, a valve and a flowmeter are arranged on the water pipe, the on-off state of the valve is controlled by the controller, the controller meters the injected purified water through the flowmeter, a temperature sensor for measuring the water temperature and a low water level sensor for measuring the lower limit of the water level are arranged in the hot water tank, the temperature sensor and the low water level sensor are both electrically connected with the controller, and the heater is also electrically connected with the controller;

when the low water level sensor measures that the water level in the hot water tank is lower than the lower limit of the water level, the controller controls the valve to be opened, measures the single water injection amount injected into the hot water tank through the flowmeter, and controls the valve to be closed to finish single water injection when the single water injection amount reaches a set single water injection amount value; the controller controls the heater to heat water in the hot water tank, and when the temperature sensor measures that the water temperature reaches a set upper temperature limit value, the controller controls the heater to stop heating to finish single heating; and after the single water injection and the single heating are repeated for multiple times, the water injection heating process is completed until the water in the hot water tank is full and reaches the set upper limit value of the temperature.

2. The intelligent purified water heating water heater according to claim 1, wherein a high water level sensor for measuring an upper water level limit is further arranged in the hot water tank, and when the high water level sensor detects that the water level in the hot water tank reaches the upper water level limit in the process of filling water into the hot water tank, the controller controls the valve to be closed, and then water filling is stopped.

3. The intelligent water purifying and heating water heater according to claim 2, wherein the controller includes a water injection valve control circuit for controlling a valve for opening or closing the water injection to the hot water tank, a water injection amount detection circuit for detecting an amount of water injected into the hot water tank through the flow meter, a high water level detection circuit for detecting a low water level and a high water level sensor for detecting a low water level and a high water level in the hot water tank, a heating control circuit for controlling the heater to open or close the heating of water in the hot water tank, a single chip microcomputer electrically connected to these circuits, and a power supply circuit for supplying power to these circuits and the single chip microcomputer, the water temperature detection circuit is electrically connected with the temperature sensor and is used for detecting the temperature of water in the hot water tank.

4. The intelligent water purifying and heating water heater according to claim 3, wherein the power circuit comprises a chip XL1509-5V, the input end of the chip XL1509-5V is connected with an external direct current power supply, the output end of the chip XL1509-5V is connected with the cathode of an output protection diode, the anode of the output protection diode is grounded, meanwhile, the output end of the chip XL1509-5V is also connected with an inductor, the other end of the inductor is connected with the anode of a first polarity capacitor, the cathode of the first polarity capacitor is grounded, the anode of the first polarity capacitor is also electrically connected with the feedback end of the chip XL1509-5V, the switch end of the chip XL1509-5V is grounded, and other pin ends of the chip XL1509-5V are grounded; the positive pole of the first polarity capacitor is connected with the positive pole of the first diode, the negative pole of the first diode is connected with the positive pole of the second diode, the negative pole of the second diode is connected with the power supply current-limiting resistor, and the other end of the power supply current-limiting resistor provides a +4V power supply for the single chip microcomputer to supply power.

5. The intelligent purified water heating water heater according to claim 4, wherein the high water level detection circuit comprises a high water level detection first voltage-dividing resistor and a high water level detection second voltage-dividing resistor, an electric connection part between the high water level detection first voltage-dividing resistor and the high water level detection second voltage-dividing resistor is electrically connected with the high water level detection sensor and is also electrically connected with one end of a high water level detection current-limiting resistor, and the other end of the high water level detection current-limiting resistor is electrically connected with one input/output end of the singlechip as a high water level detection signal input end; the other end of the high water level detection first divider resistor is used as a high water level detection control end and is electrically connected with the other input/output end of the single chip microcomputer, when the high water level detection control end generates high voltage, the single chip microcomputer collects the signal voltage of the high water level detection signal input end, and the other end of the high water level detection second divider resistor is grounded.

6. The intelligent water purifying and heating water heater according to claim 4, wherein the water injection valve control circuit comprises an MOS (metal oxide semiconductor) tube, the external direct current power supply is connected with the cathode of a power supply protection diode, the anode of the power supply protection diode is connected with the drain electrode of the MOS tube, and a capacitor is connected in parallel between the anode and the cathode of the power supply protection diode; the drain electrode of the MOS tube is used as a control end of the water injection valve and is electrically connected with one wiring end of the water injection valve, and the other wiring end of the water injection valve is electrically connected with an external direct-current power supply; the source electrode of the MOS tube is grounded; and the grid electrode of the MOS tube is electrically connected with one input/output end of the singlechip through an electrically-connected water injection control current-limiting resistor.

7. The intelligent water purifying and heating water heater according to claim 4, wherein the water injection amount detection circuit comprises a flow detection interface, wherein a +4V power supply is connected to the first terminal for supplying power to the flow meter; the second wiring end is electrically connected with one end of a flow detection current-limiting resistor, the other end of the flow detection current-limiting resistor is electrically connected with one input end and one output end of the single chip microcomputer as a water injection amount detection signal input end, and the water injection amount detection signal input end is also connected with a capacitor in parallel and then grounded; the third terminal is also connected to ground.

8. The intelligent water purifying and heating water heater according to claim 4, wherein the heating control circuit comprises a heating relay, the positive control end of the heating relay is electrically connected with an external direct current power supply, the negative control end of the heating relay is electrically connected with the collector electrode of a heating control triode, the emitter electrode of the heating control triode is grounded, the base electrode of the heating control triode is electrically connected with a first heating current-limiting resistor and then connected to one input/output end of the singlechip, and a second heating current-limiting resistor is further connected between the base electrode and the emitter electrode of the heating control triode; one controlled end of the heating relay is electrically connected with a live wire end of external alternating current, and the other controlled end of the heating relay is electrically connected with a live wire end of alternating current of the heater.