CN105805951B - A water heater with an anti-dry burning device and a judging method - Google Patents

Abstract

The invention provides a water heater with an anti-dry-burning device, comprising a casing, an inner tank, an electrical room, a thermostat, and a control panel are arranged inside the casing, and a hanger is arranged on the back of the casing, and the hanger is arranged on the back of the casing. A fixing piece is arranged on the frame, and the fixing piece extends into the interior of the wall to fix the water heater, and the water heater is also provided with a pressure sensing device. Also provided is a dry-burning prevention judgment method for the above water heater. In the present invention, the pressure sensing device is arranged to sense the weight change of the water heater, and the pressure sensor converts the pressure signal into an electrical signal and provides it to the control board to control whether the heating element works or not. If the main circuit power is turned on or off, it is guaranteed that there will be no dry burning phenomenon from the root cause.

Description

A water heater with an anti-dry burning device and a judging method

technical field

The invention belongs to the technical field of water heaters, and in particular relates to a water heater with an anti-dry burning device and a judgment method.

Background technique

General electric water heaters use metal tubular electric heating elements as heating elements. The current temperature measurement method is to keep a certain distance between the heating tube and the temperature measurement tube, and a temperature sensor is placed in the temperature measurement tube. Once dry burning occurs, the heating tube The heat of dry heating is first transferred to the air, which is transferred from the air to the temperature measuring tube, and then to the temperature sensing device. damage.

Especially when the municipal pipe network is out of water, there is no water in the water pipe connected to the water heater in the user's home, and the water in the water heater will siphon, that is, the water in the water heater will flow back to the municipal pipe network. At this time, when the water heater is powered on, Dry burning phenomenon will occur, and the above-mentioned temperature measurement method takes a long time to judge dry burning due to temperature sensing, and users cannot find it in time, which is more likely to cause the problem of dry burning damage to the heating tube.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problem that the existing temperature sensing device used for preventing dry burning is not sensitive enough, which easily leads to dry burning damage to the heating pipe, and provides a water heater with an anti-dry burning device and a judging method.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to be realized:

A water heater with an anti-dry-burning device, comprising a casing, an inner tank, an electrical room, a thermostat, and a control panel are arranged inside the casing, a hanger is arranged on the back of the casing, and a fixing frame is arranged on the hanger The fixing piece extends into the interior of the wall to fix the water heater, and the water heater is also provided with a pressure sensing device.

Further, the fixing member includes an expansion hook and an expansion bolt.

Further, the pressure sensing device adopts a pressure sensor or a pressure switch.

Further, the pressure sensor includes a signal line, and the signal line is electrically connected to the control board in the electrical room.

Further, the pressure switch is connected in the main circuit of the water heater. When the pressure is lower than a certain value, the pressure switch directly cuts off the main circuit to avoid dry burning.

Further, the pressure sensing device is arranged between the hanger and the expansion bolt, and is in contact with the hanger.

Alternatively, the pressure sensing device is arranged between the hanger and the expansion hook, and is in contact with the hanger.

Still alternatively, the pressure sensing device is integrally provided with the hanger. A pressure sensing device is arranged on the hanger, which directly senses the weight change of the water heater, and judges whether the water heater is full of water through different weights, so as to control whether to heat or not.

The above-mentioned water heater anti-dry-boil judgment method with an anti-dry-boil device adopts the following steps:

S1. According to the total weight G of the water heater in the state of full water, calculate the force F on the hanger and the force F1 in the horizontal direction of the hanger;

S2, calculate the pressure value f received by the pressure sensing device, and set the initial pressure value f1 of the pressure sensing device, f1≤f;

S3. When the pressure value of the pressure sensing device is lower than f1, the signal line converts the pressure signal into an electrical signal and transmits it to the control board, and the control board controls the heating element to not work; or, the pressure switch controls the main circuit of the input water heater and cuts off the main circuit Circuit power supply to avoid dry burning.

Compared with the prior art, the advantages and positive effects of the present invention are:

In the present invention, the pressure sensing device is arranged to sense the weight change of the water heater, and the pressure sensor converts the pressure signal into an electrical signal and provides it to the control board to control whether the heating element works or not. If the main circuit power is turned on or off, it is guaranteed that there will be no dry burning phenomenon from the root cause.

Description of drawings

FIG. 1 is a side view of a specific embodiment of a water heater with a dry-burning prevention device according to the present invention.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

The invention creatively adopts a pressure sensing device to prevent the dry burning phenomenon from the root. Specifically, referring to Figure 1,

A water heater with an anti-dry-burning device, comprising a shell 1, an inner tank inside the shell 1, an electrical room, a thermostat and a control panel in the electrical room, a hanger 2 on the back of the shell 1, and a The upper end is provided with an expansion hook 3, the lower end is provided with an expansion bolt 4, the expansion hook 3 and the expansion bolt 4 extend into the interior of the wall 5 to fix the entire water heater, a pressure sensor 6 is arranged between the expansion bolt 4 and the hanger 2, and the pressure sensor 6 is provided with a signal Line 7 and signal line 7 are electrically connected to the control board, and the pressure sensor 6 is in close contact with the hanger 2 to sense pressure changes from the hanger 2 at any time.

The pressure signal sensed by the pressure sensor 6 is converted into an electric signal and transmitted to the control board to control whether the electric heating element works or not, and the heating element does not work, so as to avoid the dry burning damage of the heating element.

Of course, the above-mentioned pressure sensor 6 can be replaced with a pressure switch, which is connected to the main circuit of the water heater. When the pressure is lower than the set value of the pressure switch, the pressure switch directly cuts off the main circuit to avoid dry burning.

Of course, the pressure sensor 6 in the above embodiment can also be arranged between the expansion hook 3 and the hanger 2, and the working principle is the same.

As a further improvement of this embodiment, the pressure sensor can also be arranged on the hanger 2 and formed integrally with the hanger 2, and a pressure sensing device is arranged on the hanger 2 to directly sense the weight change of the water heater, and judge whether the water heater is not based on different weights. It is full of water in order to control whether to heat or not.

The above-mentioned water heater anti-dry burning judgment method adopts the following steps:

S1. According to the total weight G of the water heater in the full water state, calculate the force F on the hanger 2 and the force F1 in the horizontal direction of the hanger 2;

S2, calculate the pressure value f received by the pressure sensor 6, and set the initial pressure value f1 of the pressure sensor 6, f1<f;

S3. When the pressure value of the pressure sensor 6 is lower than f1, the signal line 7 converts the pressure signal into an electrical signal and transmits it to the control board, and the control board controls the heating element to not work; or, the pressure switch controls the main circuit input to the water heater, and disconnects Main circuit power supply to avoid dry burning phenomenon.

The pressure signal sensed by the pressure sensing device is transmitted to the control board to control whether the electric heating element works.

The specific working principle is as follows, as shown in Figure 1, according to the force analysis, when the water volume inside the water heater is different, the gravity G of the water heater is different, the pulling force F of the hanger 2 is also different, and the force F1 in the horizontal direction of the hanger is naturally the same Different, the pressure f of the pressure sensing device is also different. Take 60L as an example, when a certain amount of water is consumed, such as 10L, the gravity G of the water heater itself will decrease, F will also decrease, F1 will also decrease, f It will also decrease. Set the pressure value of the pressure sensing device at this time to the initial pressure value f1. When the pressure value is lower than f1, it is considered that the water volume is abnormally reduced, and the water is not satisfied. At this time, a signal of insufficient water volume is given or directly. Cut off the main circuit, so that the heating element cannot work. When the water is full, the pressure sensing device senses that the pressure is greater than or equal to f1, giving a signal of sufficient water or turning on the main circuit, completely guaranteeing that there will be no dry burning from the root cause. Phenomenon.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.

Claims (8)

1. The utility model provides a water heater with prevent dry combustion method device, includes the casing, the inside inner bag that sets up of casing, electrical apparatus room, set up temperature controller in the electrical apparatus room, the control panel, the casing back sets up the stores pylon, the upper end of stores pylon sets up the inflation couple, and the lower extreme sets up expansion bolts, inflation couple and expansion bolts stretch into the wall body inside and fix its characterized in that with the water heater: the pressure sensing device is arranged on the back of the hanging rack and is in close contact with the hanging rack, the pressure sensing device is arranged between the hanging rack and the expansion bolt, and the pressure sensing device detects the tension of the hanging rack on the expansion bolt in the horizontal direction and is used for judging the water shortage state of the water heater.

2. The water heater with the dry-heating preventing device according to claim 1, wherein: the pressure sensing device adopts a pressure sensor or a pressure switch.

3. The water heater with the dry-heating preventing device according to claim 2, characterized in that: the pressure sensor comprises a signal wire which is electrically connected with a control board in the electric appliance room.

4. The water heater with the dry-heating preventing device according to claim 2, characterized in that: the pressure switch is connected in the main circuit of the water heater.

5. The water heater with the dry-heating preventing device according to claim 2, characterized in that: the pressure sensing device is arranged between the hanging rack and the expansion bolt and is in contact with the hanging rack.

6. The water heater with the dry-heating preventing device according to claim 2, characterized in that: the pressure sensing device is arranged between the hanging rack and the expansion hook and is in contact with the hanging rack.

7. The water heater with the dry-heating preventing device according to claim 2, characterized in that: the pressure sensing device and the hanging rack are integrally arranged.

8. A dry burning prevention judgment method for a water heater is characterized by comprising the following steps:

s1, calculating an acting force F borne by the hanger and an acting force F1 in the horizontal direction of the hanger according to the total weight G of the water-full state of the water heater;

s2, calculating a pressure value f borne by the pressure sensing device, and setting an initial pressure value f1 of the pressure sensing device, wherein f1 is not more than f;

s3, when the pressure value of the pressure sensing device is lower than f1, the signal wire converts the pressure signal into an electric signal and transmits the electric signal to the control board, and the control board controls the heating element not to work; or the pressure switch controls the main circuit of the water heater to be input, the power supply of the main circuit is cut off, and the dry burning phenomenon is avoided.

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