Electric water heater

Abstract

The utility model relates to the technical field of water heaters, in particular to an electric water heater. Comprising a shell, a first water storage tank, a second water storage tank, a water inlet pipe, a water outlet pipe and a thermostatic valve, a first water storage tank and a second water storage tank are fixedly installed in the machine shell, a water inlet pipe and a water outlet pipe are connected to the first water storage tank and the second water storage tank respectively, a thermostatic valve is installed between the water inlet pipe and the water outlet pipe, a water inlet temperature sensor is installed on the water inlet pipe, and a water outlet temperature sensor is installed on the water outlet pipe; compared with a magnetic rotor structure adopted in the prior art, a magnetic rotor does not need to be installed, the maximum rotor clamping and blocking problem of the constant-temperature water storage type electric water heater is solved, the problem that water flow signals are lost due to rotor clamping and blocking is solved, and then the using effect of the electric water heater is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to an electric water heater. Background Art

[0002] An electric water heater refers to a water heater that uses electricity as an energy source for heating. It is one of the three major water heaters alongside gas water heaters and solar water heaters. Electric water heaters can be divided into three types according to the heating power: storage type (also known as volumetric or heat storage type), instant type, and fast heating type (also known as semi-storage type).

[0003] When an existing ordinary storage-type electric water heater is working, a magnetic rotor is generally installed on the inlet pipe or the outlet pipe. During the water outlet process, the water flow drives the magnetic rotor to rotate, causing the magnetic rotor to generate a magnetic field. A Hall sensor located on the electric water heater will detect the magnetic field and then transmit the Hall signal to the controller. Finally, the controller controls the constant temperature valve to work. However, since dirt will continuously accumulate in the water pipe and there will also be impurities in the water flow, when it reaches a certain level, it may jam the magnetic rotor, causing the magnetic rotor not to rotate, and thus no magnetic field will be generated. As a result, the controller cannot control the constant temperature valve to work through the transmission of the Hall signal, making the electric water heater unable to work properly and malfunction frequently, greatly affecting the working effect of the electric water heater. Based on this, we propose a new type of electric water heater. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an electric water heater. After the structural improvement, the electric water heater can effectively solve the problems raised in the above background art.

[0005] The technical solution of the utility model is as follows:

[0006] An electric water heater includes a machine shell, a first water storage tank, a second water storage tank, an inlet pipe, an outlet pipe, and a constant temperature valve;

[0007] The first water storage tank and the second water storage tank are fixedly installed inside the machine shell. The inlet pipe and the outlet pipe are respectively connected to the first water storage tank and the second water storage tank. A constant temperature valve is installed between the inlet pipe and the outlet pipe. An inlet water temperature sensor is installed on the inlet pipe, and an outlet water temperature sensor is installed on the outlet pipe.

[0008] Further, the constant temperature valve includes a connecting water pipe. A connecting water pipe is installed between the water inlet pipe and the water outlet pipe. A motor is fixedly installed on the connecting water pipe through a snap ring. The rotating end of the motor is connected to a rotating gear. The other end of the rotating gear is connected to a driving gear. The driving gear is of a fan-shaped structure. A rotating shaft is fixedly connected to the middle of the driving gear. The other end of the rotating shaft is rotatably connected to a valve core through an adapter block. The valve core is made of ceramic. Water inlet holes, water outlet holes and drain holes are respectively arranged on the valve core. The water inlet hole is communicated with the connecting water pipe. The connecting water pipe is communicated with the water inlet pipe. The water outlet hole is communicated with the water inlet end of the water outlet pipe. The water inlet hole and the water outlet hole are respectively communicated with the drain hole. The drain hole is communicated with the water outlet end of the water outlet pipe.

[0009] Further, a magnesium rod is also fixedly installed inside the first water storage tank.

[0010] Further, an electric heating pipe is fixedly installed inside the second water storage tank.

[0011] Further, a water storage tank temperature sensor and a water inlet connecting pipe are also arranged inside the second water storage tank. The water storage tank temperature sensor is arranged inside the electric heating pipe. The water inlet connecting pipe is communicated with the water outlet pipe. The other end of the water inlet connecting pipe extends to the inner top of the second water storage tank.

[0012] Further, a sewage pipe is also installed on the bottom surface of the second water storage tank.

[0013] The beneficial effects of the present utility model are as follows:

[0014] Compared with the prior art, by respectively installing a water inlet temperature sensor and a water outlet temperature sensor on the water inlet pipe and the water outlet pipe, when the user is using water, if the water outlet temperature detected by the water outlet temperature sensor is higher than the water outlet temperature detected by the water inlet temperature sensor, it is determined that water is being used. The controller will control the constant temperature valve to work, so that the water outlet temperature is adjusted to the set temperature. When the water is turned off, the water outlet temperature of the water outlet pipe will drop rapidly. When the water outlet temperature is lower than the set water outlet temperature, it is determined that there is no water flow. At this time, the controller will control the constant temperature valve to return to the set position. Compared with the magnetic rotor structure in the prior art, this structure does not need to install a magnetic rotor, solves the biggest problem of rotor jamming in the constant temperature storage type electric water heater, and no longer has the problem of water flow signal loss due to rotor jamming, thereby greatly improving the use effect of the electric water heater. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a first internal structural schematic diagram of the present utility model;

[0017] Figure 3 This is a schematic diagram of the second internal structure of the present utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the water inlet pipe and the water outlet pipe connecting valve core of the present utility model.

[0019] In the figure, 1 is the machine shell; 2 is the first water storage tank; 3 is the second water storage tank; 4 is the water inlet pipe; 5 is the water outlet pipe; 6 is the thermostatic valve; 7 is the water inlet temperature sensor; 8 is the water outlet temperature sensor; 9 is the connecting water pipe; 10 is the snap ring; 11 is the motor; 12 is the rotating gear; 13 is the driving gear; 14 is the rotating shaft; 15 is the valve core; 16 is the water inlet hole; 17 is the water outlet hole; 18 is the drain hole; 19 is the magnesium rod; 20 is the electric heating tube; 21 is the water storage tank temperature sensor; 22 is the water inlet connecting pipe; 23 is the sewage pipe. Specific embodiments

[0020] The following further describes the specific embodiments of the present utility model with reference to the accompanying drawings:

[0021] As Figures 1-4 shown,

[0022] An electric water heater includes a machine shell 1, a first water storage tank 2, a second water storage tank 3, a water inlet pipe 4, a water outlet pipe 5 and a thermostatic valve 6; the first water storage tank 2 and the second water storage tank 3 are fixedly installed inside the machine shell 1, the first water storage tank 2 and the second water storage tank 3 are communicated, the first water storage tank 2 and the second water storage tank 3 are respectively connected with the water inlet pipe 4 and the water outlet pipe 5, a thermostatic valve 6 is installed between the water inlet pipe 4 and the water outlet pipe 5, a water inlet temperature sensor 7 is installed on the water inlet pipe 4, and a water outlet temperature sensor 8 is installed on the water outlet pipe 5; in this embodiment, the water inlet temperature sensor 7 and the water outlet temperature sensor 8 can respectively effectively detect the water inlet temperature and the water outlet temperature, compare the temperatures of the two, determine the water outlet or water stop process, and thus control the thermostatic valve 6 to work. Compared with the magnetic rotor structure in the prior art, this structure does not need to install a magnetic rotor, solves the biggest problem of rotor jamming in the constant temperature storage type electric water heater, and makes the operation of the electric water heater more stable.

[0023] As a preferred embodiment; the constant temperature valve 6 includes a connecting water pipe 9. The connecting water pipe 9 is installed between the water inlet pipe 4 and the water outlet pipe 5. The motor 11 is fixedly installed on the connecting water pipe 9 through a snap ring 10. The rotating end of the motor 11 is connected to a rotating gear 12. The other end of the rotating gear 12 is connected to a driving gear 13. The driving gear 13 is of a fan-shaped structure. A rotating shaft 14 is fixedly connected to the middle of the driving gear 13. The other end of the rotating shaft 14 is rotatably connected to a valve core 15 through an adapter block. The valve core 15 is made of ceramic. The valve core 15 is respectively provided with a water inlet hole 16, a water outlet hole 17 and a drain hole 18. The water inlet hole 16 is communicated with the connecting water pipe 9. The connecting water pipe 9 is communicated with the water inlet pipe 4. The water outlet hole 17 is communicated with the water inlet end of the water outlet pipe 5. The water inlet hole 16 and the water outlet hole 17 are respectively communicated with the drain hole 18. The drain hole 18 is communicated with the water outlet end of the water outlet pipe 5. It can be understood that when using water, when the water use switch is turned on, hot water will come out of the water outlet pipe 5 and cold water will enter the water inlet pipe 4. At this time, part of the cold water will enter the first water storage tank 2, and the other part will flow into the connecting water pipe 9. According to the set outlet water temperature, when the constant temperature valve 6 is working, it will drive the rotating gear 12 to rotate through the motor 11, and then drive the driving gear 13 and the rotating shaft 14 to rotate, and finally drive the valve core 15 to rotate, adjusting the water inlet diameters of the water inlet hole 16 and the water outlet hole 17 respectively with the connecting water pipe 9 and the water inlet of the water outlet pipe 5 (when rotating clockwise, the water inlet diameter of the water outlet hole 17 is larger, and on the contrary, the water inlet diameter of the water inlet hole 16 is larger), so that the discharged hot water and the discharged cold water are fused to the set temperature, and finally enter the water outlet pipe 5 through the drain hole 18 and are discharged; according to the different hot water temperatures discharged from the second water storage tank 3, through the control of the controller, the motor 11 can effectively continuously control and adjust the rotation of the driving gear 13 and the rotating shaft 14 (when working for a period of time, the hot water in the water storage tank may drop in temperature. At this time, it is necessary to increase the water inlet diameter of the water outlet hole 17 and reduce the water inlet diameter of the water inlet hole 16), so that different water inlet diameters of the water inlet hole 16 and the water outlet hole 17 are formed after the valve core 15 rotates; in addition, the constant temperature valve 6 used in this application can also adopt other models of constant temperature valves 6 on the market, which are not limited here.

[0024] As a preferred embodiment; a magnesium rod 19 is also fixedly installed inside the first water storage tank 2; by providing the magnesium rod 19, the dirt in the water storage tank can be effectively removed.

[0025] As a preferred embodiment; an electric heating tube 20 is fixedly installed inside the second water storage tank 3; after the electric heating tube 20 is turned on, it can effectively heat the water in the second water storage tank 3 and can also heat the water in the first water storage tank 2.

[0026] As a preferred embodiment, a water tank temperature sensor 21 and a water inlet connecting pipe 22 are further arranged inside the second water storage tank 3. The water tank temperature sensor 21 is arranged inside the electric heating pipe 20. The water inlet connecting pipe 22 is communicated with the water outlet pipe 5, and the other end of the water inlet connecting pipe 22 extends to the inner top of the second water storage tank 3. By providing the water tank temperature sensor 21, the temperature of the water in the second water storage tank 3 can be effectively detected. When the set temperature is reached, the electric heating pipe 20 will stop working. When the temperature is lower than the set temperature, the electric heating pipe 20 will work again. In addition, the water inlet end of the water inlet connecting pipe 22 is located at the inner top of the second water storage tank 3. After the water is heated, the temperature will rise, and the temperature at the inner top of the second water storage tank 3 will be higher than the temperature of the water at other positions in the second water storage tank 3.

[0027] As a preferred embodiment, a sewage discharge pipe 23 is further installed on the bottom surface of the second water storage tank 3. By providing the sewage discharge pipe 23, it is convenient to discharge the water in the water storage tank and facilitate cleaning.

[0028] The working principle of the present utility model is as follows: When the water usage switch is turned on, hot water will come out from the water outlet pipe 5, and cold water will enter from the water inlet pipe 4. When the water outlet temperature detected by the water outlet temperature sensor 8 is higher than the water inlet temperature detected by the water inlet temperature sensor 7 (both the water outlet temperature detected by the water outlet temperature sensor 8 and the water inlet temperature detected by the water inlet temperature sensor 7 will transmit information to the controller for comparison), it is determined that water is being used, and the controller will control the constant temperature valve 6 to work, so that the water outlet temperature is adjusted to the set temperature (the water comes out after passing through the constant temperature valve 6). When the water is turned off, the water outlet temperature of the water outlet pipe 5 will drop rapidly (for example, the set temperature is 42 degrees Celsius. When the water is turned off, due to the influence of the external temperature, the water outlet pipe 5 will rapidly drop to 41 degrees Celsius. At this time, the controller can control the constant temperature valve 6 to act). When the water outlet temperature is lower than the set water outlet temperature, it is determined that there is no water flow. At this time, the controller will control the constant temperature valve 6 to return to the set position.

[0029] It should be noted that the main problems in the prior art are as follows: Since dirt will continuously accumulate in the water pipe and there will also be impurities in the water flow, when it reaches a certain level, it is possible to jam the magnetic rotor, causing the magnetic rotor not to rotate, and thus no magnetic field will be generated, and the controller cannot control the constant temperature valve to work through the transmission of Hall signals, resulting in the electric water heater being unable to work properly and frequent failures, which greatly affects the working effect of the electric water heater.

[0030] Therefore, after the improvement of this application, compared with the magnetic rotor structure in the prior art, this application structure does not need to install a magnetic rotor, solves the biggest problem of rotor jamming in the constant temperature storage type electric water heater, and no longer has the problem of loss of water flow signal due to rotor jamming, thereby greatly improving the use effect of the electric water heater.

[0031] The above embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An electric water heater, comprising a casing, a first water storage tank, a second water storage tank, a water inlet pipe, a water outlet pipe and a thermostatic valve; the first water storage tank and the second water storage tank are fixedly installed inside the casing, and the water inlet pipe and the water outlet pipe are respectively connected to the first water storage tank and the second water storage tank, and it is characterized in that: A thermostatic valve is installed between the water inlet pipe and the water outlet pipe, a water inlet temperature sensor is installed on the water inlet pipe, and a water outlet temperature sensor is installed on the water outlet pipe.

2. The electric water heater according to claim 1, characterized in that: The thermostatic valve includes a connecting water pipe. A connecting water pipe is installed between the water inlet pipe and the water outlet pipe. A motor is fixedly installed on the connecting water pipe through a snap ring. The rotating end of the motor is connected to a rotating gear. The other end of the rotating gear is connected to a driving gear. The driving gear is of a fan-shaped structure. A rotating shaft is fixedly connected to the middle of the driving gear. The other end of the rotating shaft is rotatably connected to a valve core through an adapter block. The valve core is made of ceramic. The valve core is respectively provided with a water inlet hole, a water outlet hole and a drain hole. The water inlet hole is communicated with the connecting water pipe, the connecting water pipe is communicated with the water inlet pipe, the water outlet hole is communicated with the water inlet end of the water outlet pipe, the water inlet hole and the water outlet hole are respectively communicated with the drain hole, and the drain hole is communicated with the water outlet end of the water outlet pipe.

3. An electric water heater according to claim 2, characterized in that: A magnesium rod is also fixedly installed inside the first water storage tank.

4. An electric water heater according to claim 3, characterized in that: An electric heating pipe is fixedly installed inside the second water storage tank.

5. An electric water heater according to claim 4, characterized in that: A water storage tank temperature sensor and a water inlet connecting pipe are further arranged inside the second water storage tank. The water storage tank temperature sensor is arranged inside the electric heating pipe. The water inlet connecting pipe is communicated with the water outlet pipe, and the other end of the water inlet connecting pipe extends to the inner top of the second water storage tank.

6. An electric water heater according to claim 5, characterized in that: A sewage discharge pipe is also installed on the bottom surface of the second water storage tank.

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