TW202212748A - A storage type electric water heater - Google Patents

Abstract

The present invention is applicable for the technical field of electric water heater, and provides a storage type electric water heater, including a tank for water storage, a heating system, and water inlet and outlet pipes. The heating system includes: a thermostat device for detecting the temperature of the water body inside of the tank which controls the operation of the heating device; the heating device is disposed within the tank; and the heating pipe is arranged to surround with the heating device, in which provide the space between the heating pipe and the heating device to having the heating passage, the heating pipe is arranged with a plurality of holes facing to the heating passage; one end of the water inlet pipe is connected to the external water supply system, and the other end is connected to the water inlet and extending into the bottom or middle part of the tank; one end of the water outlet pipe is connected with the water outlet, and the other end extending into the proximal end of the top of the tank and is connected with the heating pipe. Thereby, the storage-type electric water heater of the present invention provides the time to heat up the water body near the heating device can be extended.

Description

Storage type electric water heater

The invention relates to the technical field of electric water heaters, in particular to a water storage type electric water heater.

Household storage-type electric water heaters generally provide hot water for bathing or washing tableware. Before using hot water, the heating device in the storage-type electric water heater should be turned on to increase the temperature of the water body in the entire storage-type electric water heater. , and the thermostat set in the storage-type electric water heater limits the upper limit of the water temperature. When the user uses hot water, the hot water flows out from the storage type electric water heater, and the water at room temperature or lower temperature enters the storage type electric water heater to supplement the outflowing water body. As the water temperature in the storage type electric water heater drops, The thermostat restarts the heating device of the water storage type electric water heater. However, when a large amount of hot water flows out and bottom temperature water flows in, the heating speed of the heating device becomes the time that the storage-type electric water heater can continuously provide ideal hot water.

To sum up, the storage-type electric water heater in the prior art obviously has inconvenience and defects in practical use, so it is necessary to improve it.

In view of the above-mentioned defects, the purpose of the present invention is to provide a water storage type electric water heater to prolong the heating time of the water body near the heating device.

In order to achieve the above purpose, the present invention provides a water storage type electric water heater, including an inner tank for water storage, a heating system, and water outlet and inlet pipes, and the heating system includes: a constant temperature device, which detects the water temperature of the water body in the inner tank, and controls the operation of the heating device according to the detected water temperature and the preset first temperature; A heating device, arranged inside the inner tank, executes or stops the work of heating the water body according to the control of the constant temperature device; The heating tube is arranged around the heating device, the space between the heating tube and the heating device formed by the heating tube is a heating channel, and a plurality of through holes are opened on the tube wall of the heating tube facing the heating channel ; One end of the water inlet pipe is connected with the external water supply system, and the other end is connected with the water inlet provided at the bottom of the inner tank, and extends into the bottom or middle of the inner tank; One end of the water outlet pipe is connected with the water outlet provided at the bottom of the inner pot, and the other end extends into the proximal end of the top of the inner pot and is connected with the heating pipe.

According to the water storage type electric water heater, the constant temperature device includes: A temperature sensor, arranged in the inner tank, detects the water temperature of the water body, and sends first temperature information to the thermostatic controller when it is detected that the water temperature reaches a preset first temperature; When the water temperature does not reach the preset first temperature, send second temperature information to the thermostatic controller; a thermostatic controller, which is electrically connected to the power switch of the water storage type electric water heater and the heating device, and is also connected to the temperature sensor in communication, and the thermostatic controller receives the first temperature When the information is received, stop transmitting the working current to the heating device; When the thermostat controller receives the second temperature information, it resumes transmitting the working current to the heating device.

According to the water storage type electric water heater, the constant temperature device further comprises: a water pressure sensor, connected in communication with the thermostatic controller, the water pressure sensor is arranged in the inner tank to detect the water pressure of the water body, and when it is detected that the water pressure reaches a preset safe water pressure, Send the first water pressure information to the thermostatic controller and safety valve; A safety water outlet device is connected in communication with a thermostatic controller, the safety water outlet device includes a safety valve and a safety water outlet pipe connected to the safety valve and extending out of the inner tank, the safety valve is arranged on the inner tank of the inner tank. top; The temperature sensor is further configured to send third temperature information to the thermostatic controller when it is detected that the water temperature reaches a preset second temperature; When the thermostat controller receives the third temperature information, it stops transmitting the working current to the heating device; and controls the safety valve to open; When the thermostat controller receives the first water pressure information, it transmits a working current to the heating device; and controls the safety valve to open; The preset first temperature is smaller than the second temperature.

According to the water storage type electric water heater, the constant temperature device further comprises: a timer, connected in communication with the temperature sensor and/or the water pressure sensor, respectively, to time a predetermined interval time, and when the interval time arrives, the temperature sensor and/or the water pressure sensor detects the water body temperature and/or pressure of the water body.

According to the water storage type electric water heater, the heating pipe is in a spiral shape; the heating pipe is a hollow pipe; The heating channel is an open heating channel with an open bottom and a top. The water entering from the water inlet pipe enters the heating channel from the bottom of the heating channel, and flows to the heating channel after being heated and raised by the heating device. The top of the channel; or after being heated and heated by the heating device, it flows to the plurality of through holes, enters the heating pipe, and flows to the water outlet pipe.

According to the water storage type electric water heater, one end of the water outlet pipe extending into the top of the inner tank is in an inverted U-shape; The heating device is arranged at the bottom of the inner pot and in the middle area of the inner pot.

According to the water storage type electric water heater, the temperature sensor is arranged at the bottom of the inner pot; the water pressure sensor is arranged at the top of the inner pot.

According to the water storage type electric water heater, the preset first temperature is 40°C~60°C; the preset second temperature is 75°C~90°C; the preset water pressure is 9 Pascal~ 11 Pascals.

According to the storage-type electric water heater, the preset first temperature is 50°C; the preset second temperature is 85°C; and the preset safe water pressure is 10 Pascals.

According to the water storage type electric water heater, the power switch is connected to an external power supply system; the water outlet pipe and the heating pipe are made of metal materials.

According to the water storage type electric water heater, the metal material is metal copper or aluminum alloy.

According to the water storage type electric water heater, a plurality of the through holes are evenly arranged on the pipe wall of the heating pipe facing the heating channel.

In the present invention, the water storage type electric water heater is configured to include an inner tank for water storage, a heating system, and water outlet and water inlet pipes, and the heating system includes a constant temperature device, a heating device and a heating pipe, so that the heating time of the water body near the heating device is prolonged. The constant temperature device is used to detect the water temperature of the water body in the inner tank, and control the work of the heating device according to the detected water temperature and the preset first temperature; the heating device is arranged on the inner tank of the inner tank. Inside, the heating of the water body is performed or stopped according to the control of the constant temperature device; the heating pipe is arranged around the heating device, and the space between the two formed by the heating pipe surrounding the heating device is a heating channel, The heating pipe is provided with a plurality of through holes on the pipe wall facing the heating channel; the heating pipe of this structural design increases the time that the water body stays near the heating device to improve the heating time of the water body. One end of the water inlet pipe is connected to the external water supply system, and the other end is connected to the water inlet provided at the bottom of the inner tank, and extends into the bottom or middle of the inner tank; The water outlet at the bottom of the inner pot is connected, and the other end extends into the proximal end of the top of the inner pot and is connected with the heating pipe. Thereby, the storage-type electric water heater of the present invention can prolong the heat-receiving time of the water body in the vicinity of the heat generating device.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Referring to FIGS. 1 to 4 , in one embodiment of the present invention, a water storage type electric water heater 100 is provided, including a water storage tank 10, a heating system, a water outlet pipe 20, and a water inlet pipe 30. The heating system include: The constant temperature device 40 detects the water temperature of the water body in the inner tank 10, and controls the operation of the heating device 50 according to the detected water temperature and the preset first temperature; The heating device 50 is arranged inside the inner tank 10, and performs or stops heating the water body according to the control of the constant temperature device 40; The heating tube 60 is arranged around the heating device 50, the space between the heating tube 60 and the heating device 50 is a heating channel 70, and a plurality of through holes 61 are opened on the wall of the heating tube 60 facing the heating channel 70; One end of the water inlet pipe 30 is connected to the external water supply system, and the other end is connected to the water inlet 31 provided at the bottom of the inner bladder 10, and extends into the bottom or middle of the inner bladder 10; One end of the water outlet pipe 20 is connected to the water outlet 21 provided at the bottom of the inner pot 10 , and the other end extends into the proximal end of the top of the inner pot 10 and is connected to the heating pipe 60 .

In this embodiment, the water storage type electric water heater 100 is configured to include an inner tank 10 for water storage, a heating system, a water outlet pipe 20 and a water inlet pipe 30 . The bottom of the inner tank 10 for storing the preheated water body is provided with a water inlet 31, one end of the water inlet pipe 30 is connected to the water inlet 31, and the other end is connected to the water supply system where the storage type electric water heater 100 is located. When the inner tank 10 of 100 has a water storage space, water is fed into the inner tank 10 by the water pressure of the water supply system through the water inlet pipe 30 . The bottom of the inner bladder 10 is also provided with a water outlet 21. One end of the water outlet pipe 20 is connected to the water outlet 21, and the other end extends into the proximal end of the top of the inner bladder 10 and is connected with the heating pipe 60. The hot water heated by the heating device 50 is sent out for use by the user. The heating system includes a constant temperature device 40, a heating device 50 and a heating pipe 60; the constant temperature device 40 is used to detect the water temperature of the water body in the inner tank 10 and control the heating device according to the detected water temperature and a preset first temperature 50; the heating device 50 is arranged inside the inner tank 10, and the work of heating the water body is performed or stopped according to the control of the constant temperature device 40; the heating pipe 60 is arranged around the heating device 50, and the heating pipe 60 surrounds the heating device 50. The space between the two formed is a heating channel 70 , a plurality of through holes 61 are formed on the wall of the heating tube 60 facing the heating channel 70 , and the heating tube 60 is facing the tube wall of the inner bladder 10 . No through hole 61 is provided, so that the water in the heating channel 70 can enter the heating pipe 60 . The water body in the heating channel 70 is heated by the working heating device 50 because it is near the heating device 50. The through hole 61 on the heating pipe 60 makes the water body conduct limited convection between the heating pipe 60 and the heating channel 70. The limited convection is determined by the size of the through holes 61 on the pipe wall and the number of the through holes 61 . The diameter of the through hole 61 is smaller and the number of through holes 61 is smaller, and the convection of the water body after entering the heating pipe 60 is less; more. Preferably, a plurality of the through holes 61 are evenly arranged on the pipe wall of the heating pipe 60 facing the heating channel 70 . The heating pipe 60 arranged around the heating device 50 limits the water body adjacent to the heating device 50 to stay near the heating device 50 for a long time to increase the heating time of the water body.

Referring to FIG. 3, specifically, the thermostat 40 includes: A temperature sensor 41, disposed in the inner tank 10, detects the water temperature of the water body, and when it is detected that the water temperature reaches a preset first temperature, sends first temperature information to the thermostatic controller 42; or When the water temperature does not reach the preset first temperature, the second temperature information is sent to the thermostatic controller 42; the preset first temperature is set according to the actual usage of the user, and the preset first temperature Preferably, it is 40°C to 60°C, and more preferably, the preset first temperature is 50°C; The thermostatic controller 42 is electrically connected to the power switch 80 of the storage type electric water heater 100 and the heating device 50 respectively, and is also connected to the temperature sensor 41 in communication respectively. The thermostatic controller 42 is receiving When the first temperature information is reached, the transmission of the working current to the heating device 50 is stopped; the thermostat controller 42 resumes the transmission of the working current to the heating device 50 when the second temperature information is received. The power switch 80 is preferably an external power supply system; if the water storage type electric water heater 100 is used at home, it is powered by the home power supply system, and the power supply is controlled by the power switch 80. The power switch 80 can be convenient for users to turn on the The power switch 80 supplies power to the water storage type electric water heater 100 and enters a standby state, and the water body in the inner tank 10 is heated. When the water storage type electric water heater 100 is in the standby state, since the water outlet pipe 20 is closed, the convection of the water in the heating channel 70 and the heating pipe 60 is less. And when the water storage type electric water heater 100 is in the standby state, that is, the heating device 50 has been turned on for heating, and the user has not opened the water outlet pipe 20, the water body is only heated in the inner tank 10, because the water body adjacent to the heating device 50 is heated first, and the water is heated by the heating device 50. The heating channel 70 formed by the heating tube 60 defines that the higher temperature water rises to the top of the heating channel 70, and then to the top of the inner tank 10, pushes the lower temperature water body downward, and then enters the heating device 50 from the bottom of the heating channel 70. When the temperature sensor 41 sends the first temperature information to the thermostat controller 42, the thermostat controller 42 controls the latch to supply power to the heating device 50, and stops The working current is transmitted to the heating device 50; when the user is ready to use hot water, the switch of the storage-type electric water heater 100 is activated to use the hot water, and the temperature sensor 41 detects that the water temperature does not reach the preset first temperature , send the second temperature information to the thermostat controller 42; when the temperature sensor 41 sends the second temperature information to the thermostat controller 42, the thermostat controller 42 controls to turn on the power supply to the heating device 50, and restores the power to the heating device 50 transmit operating current.

Referring to FIGS. 1 to 3 , in an embodiment of the present invention, the thermostat 40 further includes: The water pressure sensor 43 is connected in communication with the thermostatic controller 42. The water pressure sensor 43 is arranged in the inner tank 10 to detect the water pressure of the water body, and when it is detected that the water pressure reaches a preset safety When the water pressure is used, the first water pressure information is sent to the thermostatic controller 42 and the safety valve 441; A safety water outlet device 44 is connected in communication with the thermostatic controller 42. The safety water outlet device 44 includes a safety valve 441 and a safety water outlet pipe 442 connected to the safety valve 441 and extending out of the inner tank 10. The safety valve 441 is arranged on the top of the inner tank 10; The temperature sensor 41 is further configured to send third temperature information to the thermostat controller 42 when it is detected that the water temperature reaches a preset second temperature; When the thermostatic controller 42 receives the third temperature information, it stops transmitting operating current to the heating device 50; and controls the safety valve 441 to open; When the thermostatic controller 42 receives the first water pressure information, it transmits working current to the heating device 50; and controls the safety valve 441 to open; The preset first temperature is smaller than the second temperature.

In this embodiment, in order to ensure the user's water safety, when the temperature of the water body inside the inner container 10 is too high or the water pressure is too high, the safety valve 441 is opened to discharge the water body inside the inner container 10 . Specifically, the thermostatic device 40 further includes a water pressure sensor 43 and a safety water outlet device 44. The water pressure sensor 43 is arranged in the inner tank 10 to detect the water pressure of the water body, and when any When the water pressure reaches a preset safe water pressure, the first water pressure information is sent to the thermostatic controller 42 and the safety valve 441 , and the preset water pressure is preferably 9 Pascals to 11 Pascals. Even better, the preset safe water pressure is 10 Pascals. The safety water outlet device 44 includes a safety valve 441 and a safety water outlet pipe 442 connected to the safety valve 441 and extending out of the inner tank 10, and the safety valve 441 is arranged on the top of the inner tank 10; when When the thermostatic controller 42 receives the first water pressure information, it controls the safety valve 441 to open to discharge the water in the inner tank 10 . The temperature sensor 41 is further configured to send third temperature information to the thermostat controller 42 when it is detected that the water temperature reaches a preset second temperature; the preset second temperature is preferably 75°C to 90°C Preferably, the preset second temperature is 85°C; the thermostat controller 42 stops transmitting operating current to the heating device 50 when receiving the third temperature information; and controls the safety The valve 441 is opened, and the water in the inner tank 10 is discharged. Preferably, the temperature sensor 41 is arranged at the bottom of the inner container 10 ; the water pressure sensor 43 is arranged at the top of the inner container 10 .

Referring to FIG. 3, in an embodiment of the present invention, the thermostat device 40 further includes: The timer 45 is connected in communication with the temperature sensor 41 and/or the water pressure sensor 43, respectively, to time a predetermined interval time, and when the interval time arrives, the temperature sensor 41 and/or the water pressure sensor 43 Detecting the temperature of the water body and/or the pressure of the water body.

In this embodiment, the operation of the temperature sensor 41 and/or the water pressure sensor 43 is controlled by setting the timer 45, and the temperature sensor 41 and/or the water pressure sensor 43 work once at a predetermined interval. , the predetermined interval time is counted by the timer 45, when the interval time arrives, the temperature sensor 41 and/or the water pressure sensor 43 detect the temperature of the water body and/or the pressure of the water body.

Referring to FIG. 1 to FIG. 2, in an embodiment of the present invention, the heating tube 60 is in a spiral shape; the heating tube 60 is a hollow tube; the heating channel 70 is an open heating tube with an open bottom and top. channel 70, the water entering from the water inlet pipe 30 enters the heating channel 70 from the bottom of the heating channel 70, and flows to the top of the heating channel 70 after being heated by the heating device 50; The heating device 50 flows to the plurality of through holes 61 and enters the heating pipe 60 after being heated and heated, and flows to the water outlet pipe 20 .

In this embodiment, the heating tube 60 is in a spiral shape and the heating tube 60 is a hollow tube, the spiral heating tube 60 surrounds the heating device 50 in a spiral shape, and the spiral heating tube 60 forms a vertical opening with up and down openings. The heating channel 70, the bottom and the top of the heating channel 70 are open, and there is a space between the bottom of the heating channel 70 and the bottom of the inner tank 10. That is, the water body entering the heating channel 70 generally enters from the bottom through which the heating passes and flows out from the top. When the heating device 50 is started, the heating channel 70 enters the lower temperature water body from the bottom according to the principle of hot water rising. The high-temperature water body is released from the top and re-enters the inner tank 10 , and continues to flow in the inner tank 10 .

Referring to FIGS. 1 to 2 , in one embodiment of the present invention, the end of the water outlet pipe 20 extending into the top of the inner bladder 10 is in an inverted U-shape; the end of the water outlet pipe 20 extends into the interior The approximate top position in the bladder 10 is then turned down in a U shape, and then connected to the helical heating tube 60 .

The heating device 50 is disposed at the bottom of the inner pot 10 and in the middle area of the inner pot 10 .

In an embodiment of the present invention, the water outlet pipe 20 and the heating pipe 60 are made of metal materials. Preferably, the metal materials are metal copper or aluminum alloy. Of course, other fast heat transfer metal materials can also be used. .

When the water storage type electric water heater 100 of the present invention is in use, that is, hot water is output from the water outlet pipe 20, cold water enters the inner tank 10 through the water inlet pipe 30, and the water inlet pipe 30 drains the cold water to about the bottom or middle of the inner tank 10. The heavier hot water is lighter, and the cold water generally flows downward to the bottom of the inner tank 10. Since the hot water is output from the water outlet pipe 20 and the helical heating pipe 60 to the outside of the water storage type electric water heater 100, the helical heating The tube 60 is made into a vacuum. To fill the vacuum, the water in the heating channel 70 fills the vacuum through a plurality of through holes 61 , and further draws the water at the bottom of the inner bladder 10 from the bottom of the heating channel 70 into the heating channel 70 . During the process of passing the cold water from the water inlet pipe 30 to the bottom of the heating channel 70, it has exchanged heat with the adjacent water body, that is, it is preheated by using the heat capacity of the adjacent water body, and when it reaches the bottom of the heating channel 70, it has been preheated, When entering the heating channel 70 again, it further exchanges heat with the water body in the heating channel 70 and is heated by the heating device 50 . If the water in the heating channel 70 does not enter the helical heating tube 60 through the through hole 61, it will continue to stay in the heating channel 70 to be heated and rise to the top of the heating channel 70 and enter the top of the inner tank 10, and continue to be heated in the inner tank. 10 flow.

To sum up, in the present invention, the water storage type electric water heater is configured to include an inner tank for water storage, a heating system, and water outlet and water inlet pipes, and the heating system includes a constant temperature device, a heating device and a heating pipe, so that the heating device is near the heating device. The heating time of the water body is prolonged; the constant temperature device is used to detect the water temperature of the water body in the inner tank, and control the operation of the heating device according to the detected water temperature and the preset first temperature; the heating device is set in The inside of the inner tank performs or stops heating the water body according to the control of the constant temperature device; the heating pipe is arranged around the heating device, and the heating pipe surrounds the space between the two formed by the heating device. The space is a heating channel, and a plurality of through holes are opened on the wall of the heating tube toward the heating channel; the heating tube designed with this structure increases the time that the water body stays near the heating device to improve the heating time of the water body. One end of the water inlet pipe is connected to the external water supply system, and the other end is connected to the water inlet provided at the bottom of the inner tank, and extends into the bottom or middle of the inner tank; The water outlet at the bottom of the inner pot is connected, and the other end extends into the proximal end of the top of the inner pot and is connected with the heating pipe. Thereby, the storage-type electric water heater of the present invention can prolong the heat-receiving time of the water body in the vicinity of the heat generating device.

Of course, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and All modifications should belong to the protection scope of the appended claims of the present invention.

10: inner bladder 20: Outlet pipe 21: Water outlet 30: water inlet pipe 31: water inlet 40: Thermostat 41: Temperature sensor 42: Thermostat 43: Water pressure sensor 44: Safety water outlet device 45: Timer 50: heating device 60: Heating tube 61: Through hole 70: Heating channel 80: Power switch 100: Storage water heater 441: Safety valve 442: Safety outlet pipe

Fig. 1 is the structure schematic diagram of the water storage type electric water heater of the present invention;

Fig. 2 is the sectional view of the water storage type electric water heater of the present invention;

3 is a schematic diagram of the communication connection of the preferred embodiment of the water storage type electric water heater of the present invention;

FIG. 4 is a schematic diagram of electrical connection of a preferred embodiment of the storage-type electric water heater of the present invention.

10: inner bladder

20: Outlet pipe

21: Water outlet

30: water inlet pipe

31: water inlet

41: Temperature sensor

44: Safety water outlet device

50: heating device

60: Heating tube

70: Heating channel

100: Storage water heater

441: Safety valve

442: Safety outlet pipe

Claims (12)

A water storage type electric water heater, comprising an inner tank for water storage, a heating system and an outlet and an inlet pipe, characterized in that the heating system comprises: a constant temperature device, a heating device and a heating pipe; The constant temperature device detects the water temperature of the water body in the inner tank, and controls the operation of the heating device according to the detected water temperature and a preset first temperature; The heating device is arranged inside the inner tank, and performs or stops heating the water body according to the control of the constant temperature device; The heating tube is arranged around the heating device, the space between the heating tube and the heating device formed by the heating tube is a heating channel, and the tube wall of the heating tube facing the heating channel is provided with a plurality of passages. hole; One end of the water inlet pipe is connected with the external water supply system, and the other end is connected with the water inlet provided at the bottom of the inner tank, and extends into the bottom or middle of the inner tank; One end of the water outlet pipe is connected with the water outlet provided at the bottom of the inner pot, and the other end extends into the proximal end of the top of the inner pot and is connected with the heating pipe. The storage-type electric water heater according to claim 1, wherein the constant temperature device comprises: A temperature sensor is installed in the inner tank for detecting the water temperature of the water body, and when it is detected that the water temperature reaches the preset first temperature, a first temperature information is sent to the thermostatic controller ; Or when the water temperature does not reach the preset first temperature, send a second temperature information to the thermostatic controller; a thermostat controller, which is electrically connected to a power switch of the water storage type electric water heater and the heating device, and is also connected to the temperature sensor in communication, and the thermostat controller receives the When the first temperature information is obtained, stop transmitting the working current to the heating device; When the thermostat controller receives the second temperature information, it resumes transmitting the working current to the heating device. The storage-type electric water heater according to claim 2, wherein the thermostatic device further comprises: A water pressure sensor, which is connected in communication with the thermostatic controller, the water pressure sensor is arranged in the inner tank to detect the water pressure of the water body, and when it is detected that the water pressure reaches a preset safety level When there is water pressure, send a first water pressure information to the thermostatic controller and a safety valve; A safety water outlet device, connected in communication with the thermostatic controller, the safety water outlet device includes a safety valve and a safety water outlet pipe connected to the safety valve and extending out of the inner tank, the safety valve is arranged on the the top of the liner; The temperature sensor is further configured to send a third temperature information to the thermostatic controller when it is detected that the water temperature reaches a preset second temperature; When the thermostat controller receives the third temperature information, it stops transmitting the working current to the heating device; and controls the safety valve to open; When the thermostat controller receives the first water pressure information, it transmits a working current to the heating device; and controls the safety valve to open; The preset first temperature is smaller than the second temperature. The storage-type electric water heater according to claim 3, wherein the constant temperature device further comprises: a timer, which is connected in communication with the temperature sensor and/or the water pressure sensor, respectively, for timing a predetermined interval time, and when the interval time arrives, the temperature sensor and/or the water pressure sensor detects The temperature of the body of water and/or the pressure of the body of water. The storage-type electric water heater according to claim 1, wherein the heating pipe is in a spiral shape; the heating pipe is a hollow pipe; The heating channel is an open heating channel with an open bottom and a top. The water entering from the water inlet pipe enters the heating channel from the bottom of the heating channel, and flows to the heating channel after being heated and heated by the heating device. The top of the channel; or after being heated and heated by the heating device, it flows to the plurality of through holes, enters the heating pipe, and flows to the water outlet pipe. The water storage type electric water heater according to claim 1, wherein the end of the water outlet pipe extending into the top of the inner tank is in an upside-down U-shape; The heating device is arranged at the bottom of the inner pot and in the middle area of the inner pot. The storage-type electric water heater according to claim 3, wherein the temperature sensor is arranged at the bottom of the inner pot; the water pressure sensor is arranged at the top of the inner pot. The storage-type electric water heater according to claim 3, wherein the preset first temperature is 40°C to 60°C; the preset second temperature is 75°C to 90°C; the preset first temperature is 75°C to 90°C; The safe water pressure is 9 Pascals to 11 Pascals. The storage-type electric water heater according to claim 8, wherein the preset first temperature is 50°C; the preset second temperature is 85°C; and the preset safe water pressure is 10°C Pascal. The storage-type electric water heater according to claim 2, wherein the power switch is connected to an external power supply system; the water outlet pipe and the heating pipe are made of metal materials. The storage-type electric water heater according to claim 10, wherein the metal material is metal copper or aluminum alloy. The storage-type electric water heater according to claim 1, wherein the plurality of through holes are evenly arranged on the pipe wall of the heating pipe facing the heating channel.

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