TWM615091U - Electric water heater for evaluating whether to replace heater according to temperature change of outer wall of barrel - Google Patents

Abstract

An electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel. The electric water heater includes a water storage barrel; a heater; a first temperature sensor is arranged in the water storage barrel; The second temperature sensor measures the first and second temperatures, and then the third and fourth temperatures are measured after a predetermined time interval; the control chip calculates the first and second temperatures to obtain the first heating efficiency, and calculates the third and fourth temperatures to obtain The second heating efficiency is compared with the first heating efficiency and the second heating efficiency. When the slope comparison logic determines that the second heating efficiency is greater than the first heating efficiency, a heater replacement signal is issued.

Description

An electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel

This creation is related to electric water heaters, especially an electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel.

Electric water heaters are widely used in daily life because they have the advantages of fast heating, stable temperature, and energy saving.

Among them, the heating effect of the electric water heater is mainly provided by the heater installed in the water storage bucket. With the accumulated use of the heater, scale deposits will appear on the heater, making the heater insufficient to heat the water in the entire water storage bucket. , There is only partial heating, which will make the heater continue to heat, which makes the electric water heater more energy-consuming. In addition, because the heater is installed inside the water storage bucket, the general user cannot use the water storage bucket. Observed from the outside of the heater, the service life of the electric water heater is shortened.

Therefore, the applicant believes that if an electric water heater with a heater replacement prompt function can be provided, it can assist the user in evaluating whether the heater should be replaced, which can effectively extend the service life of the electric water heater and is convenient in use.

The main purpose of this creation is to provide an electric water heater that evaluates whether the heater should be replaced according to the temperature change of the outer wall of the barrel, which can assist the user in evaluating whether the heater should be replaced, which can effectively extend the service life of the electric water heater and is convenient in use.

The reason is that according to this creation, an electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel includes a water storage barrel with a water inlet and a water outlet; a heater is installed in the water barrel and is located Inside the water storage bucket; a first temperature sensor is located in the water storage barrel; a second temperature sensor is located in the water storage barrel and outside the water storage barrel and close to the heater, the second temperature The sensor measures a first temperature and a second temperature of the outer wall of the water storage bucket, and a third temperature and a fourth temperature of the outer wall of the water storage bucket are measured after a predetermined time interval; and a control chip, The heater, the first temperature sensor, and the second temperature sensor are electrically connected. The control chip includes a calculation unit and a control unit. The calculation unit includes a slope calculation logic and a slope comparison logic. The calculation unit receives the first temperature, the second temperature, the third temperature, and the fourth temperature, and calculates the first temperature and the second temperature by the slope calculation logic to obtain a first heating efficiency, and calculates the The third temperature and the fourth temperature obtain a second heating efficiency, and the slope comparison logic compares the first heating efficiency and the second heating efficiency. When the slope comparison logic determines that the second heating efficiency is greater than the first heating efficiency Efficiency, the control unit sends out a heater replacement signal, and the control unit controls the heater to start or not to start. .

In this way, the electric water heater provided by this creation can evaluate whether the heater should be replaced according to the temperature change of the outer wall of the barrel, which can assist the user in evaluating whether the heater should be replaced, which can effectively extend the service life of the electric water heater and is convenient in use. .

10: According to the temperature change of the outer wall of the barrel, evaluate whether the heater is replaced by an electric water heater

20: water storage bucket

21: Water inlet

23: water outlet

30: heater

40: The first temperature sensor

50: The second temperature sensor

60: control chip

61: Computing unit

63: control unit

70: Display

Figure 1 is a schematic diagram of a preferred embodiment of the present creation.

Figure 2 is a block diagram of a preferred embodiment of the present invention.

In order to explain in detail the technical characteristics of this creation, here is a preferred embodiment and the following description with the drawings, in which:

As shown in Figure 1-2, a preferred embodiment of the present invention provides an electric water heater 10 that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel. The electric water heater 10 includes a water storage barrel 20, a heater 30, and a first temperature. The sensor 40, a second temperature sensor 50 and a control chip 60.

The water storage bucket 20 has a water inlet 21 and a water outlet 23. The water inlet 21 is used for introducing water, and the water outlet 23 is used for draining water.

The heater 30 is disposed in the water storage bucket 20 and is located in the water storage bucket 20 for heating the water in the water storage bucket 20.

The first temperature sensor 40 is installed in the water storage bucket 20 to measure the water temperature in the water storage bucket 20. In this preferred embodiment, the first temperature sensor 40 is disposed in the water storage bucket 20, thereby directly detecting the water temperature in the water storage bucket 20; in other preferred embodiments, the first temperature sensor 40 The temperature sensor 40 can also be arranged outside the water storage bucket 20 to detect the water temperature in the water storage bucket 20 in an indirect manner, thereby reducing costs, improving yield, and avoiding misoperation; therefore, The first temperature sensor 40 is arranged at the position of the water storage bucket 20, and is not limited to this preferred embodiment.

The second temperature sensor 50 is arranged on the water storage bucket 20 and located outside the water storage bucket 20 and close to the heater 30. The second temperature sensor 50 measures a first temperature on the outer wall of the water storage bucket 20. Temperature and A second temperature, and a third temperature and a fourth temperature of the outer wall of the water storage bucket 20 are measured after a predetermined time interval. In the preferred embodiment, the second temperature sensor 50 is closer to the heater 30 than the first temperature sensor 40, and the first temperature, the second temperature, the third temperature, and the first temperature sensor 40 The four temperatures cannot be measured at the same time point; the time point when the second temperature sensor 50 measures the first temperature and the second temperature for the first time is the first time this creation is used, and the predetermined time is set to For half a year, and the second temperature sensor 50 measures the third temperature and the fourth temperature every predetermined time. In actual use, the user can determine the first temperature and the second temperature according to requirements. The temperature, the time of the third temperature and the fourth temperature, so the time of measuring the first temperature, the second temperature, the third temperature, and the fourth temperature is not limited to this preferred embodiment.

The control chip 60 is electrically connected to the heater 30, the first temperature sensor 40 and the second temperature sensor 50. The control chip 60 includes a calculation unit 61 and a control unit 63. The calculation unit 61 includes A slope calculation logic and a slope comparison logic. The calculation unit 61 receives the first temperature, the second temperature, the third temperature, and the fourth temperature, and calculates the first temperature and the second temperature by the slope calculation logic The temperature obtains a first heating efficiency, and the third temperature and the fourth temperature are calculated to obtain a second heating efficiency, and then the first heating efficiency and the second heating efficiency are compared by the slope comparison logic. When the slope comparison logic It is determined that the second heating efficiency is greater than the first heating efficiency, the control unit 63 sends out a heater replacement signal, and the control unit 63 controls the heater to start or not to start.

In this preferred embodiment, the slope comparison logic determines whether the second heating efficiency is greater than the first heating efficiency standard, because the second heating efficiency is greater than the first heating efficiency by a predetermined value before the The second heating efficiency is judged to be greater than the first heating efficiency. It is not that the second heating efficiency only needs to be substantially greater than the first heating efficiency to judge the second heating efficiency to be greater than the first heating efficiency; however, in other preferred embodiments If the user needs accurate calculation, the slope can also be compared logically It is set that when the second heating efficiency only needs to be substantially (the predetermined value is 0) greater than the first heating efficiency, it will be judged that the second heating efficiency is greater than the first heating efficiency. Therefore, the slope comparison logic can be used The accuracy required for adjustment is not limited to this preferred embodiment.

In this preferred embodiment, the heater replacement signal is displayed by a display screen 70, which is arranged on the outside of the water storage bucket 20; in other preferred embodiments, the heater replacement signal can also be displayed by A light signal or any device that can emit a sound (such as a buzzer, a horn) is used as a reminder, so the display mode of the heater replacement signal is not limited to this preferred embodiment.

The structure of a preferred embodiment of this creation is described above, and its operation mode is described below with reference to Figs. 1-2.

When using this creation for the first time, the second temperature sensor 50 measures the outer wall of the water tank 20 to obtain the first temperature and the second temperature. Then, the calculation unit 61 of the control chip 60 receives the first temperature. A temperature and the second temperature, and the first temperature and the second temperature are calculated by the slope calculation logic of the calculation unit 61 to obtain the first heating efficiency, which are used as the standard value of the heating efficiency of the heater 30.

After the predetermined time (half a year) is used in this creation, the second temperature sensor 50 measures the outer wall of the water storage bucket 20 to obtain the third temperature and the fourth temperature, and then calculates the slope of the control chip 60 The third temperature and the fourth temperature are logically calculated to obtain the second heating efficiency, and then the first heating efficiency and the second heating efficiency are compared by the slope comparison logic of the calculation unit 61.

When the slope comparison logic determines that the second heating efficiency is not greater than the first heating efficiency, the control unit 63 does not issue the heater replacement signal, and every time the predetermined time has elapsed, the second temperature sensing The device 50 measures the outer wall of the water storage bucket 20 to obtain the third temperature and the fourth temperature, and again determines whether the second heating efficiency is greater than the first heating efficiency by the slope comparison logic.

When the slope comparison logic determines that the second heating efficiency is greater than the first heating efficiency, it means that the temperature of the outer wall of the water storage bucket 20 near the heater 30 rises faster than the water in the water storage bucket 20, which represents The heating efficiency of the heater 30 has begun to decline. At this time, the control unit 63 displays the heater replacement signal on the display screen 70 to inform the user of the need for the heater 30 to be replaced.

Based on this, this creation provides an electric water heater that evaluates whether the heater is to be replaced based on the temperature change of the outer wall of the barrel. By measuring the temperature of the outer wall of the water storage barrel, the technical features can assist the user in evaluating whether the heater should be replaced, which can effectively extend the electric water heater. It has a long service life and is convenient to use.

10: According to the temperature change of the outer wall of the barrel, evaluate whether the heater is replaced by an electric water heater

20: water storage bucket

21: Water inlet

23: water outlet

30: heater

40: The first temperature sensor

50: The second temperature sensor

60: control chip

70: Display

Claims (6)

An electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel. A first temperature sensor is provided in the water storage bucket; a second temperature sensor is provided in the water storage bucket, and is located outside the water storage bucket and close to the heater, the second temperature sensor is measured A first temperature and a second temperature of the outer wall of the water storage bucket, and a third temperature and a fourth temperature of the outer wall of the water storage bucket are measured after a predetermined time interval; and a control chip electrically connected to the heater , The first temperature sensor and the second temperature sensor, the control chip includes a calculation unit and a control unit, the calculation unit includes a slope calculation logic and a slope comparison logic, the calculation unit receives the first A temperature, the second temperature, the third temperature, and the fourth temperature, and calculate the first temperature and the second temperature by the slope calculation logic to obtain a first heating efficiency, and calculate the third temperature and the first temperature Four temperatures are used to obtain a second heating efficiency, and then the slope comparison logic is used to compare the first heating efficiency and the second heating efficiency. When the slope comparison logic determines that the second heating efficiency is greater than the first heating efficiency, the control unit is A heater replacement signal is issued, and the control unit controls the heater to start or not to start. The electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel as described in claim 1, wherein: the heater replacement signal is displayed by a display screen arranged on the outside of the water storage barrel. The electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel as described in claim 1, wherein: the first temperature sensor is arranged in the water storage barrel. The electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel as described in claim 1, wherein: the first temperature sensor is arranged outside the water storage barrel. The electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel as described in claim 1, wherein: the second temperature sensor measures the third temperature and the fourth temperature every predetermined time. The electric water heater that evaluates whether the heater is to be replaced according to the temperature change of the outer wall of the barrel as described in claim 1, wherein: the second temperature sensor is closer to the heater than the first temperature sensor.

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