JPH06221675A - Dip tube for heating liquid - Google Patents

Abstract

PURPOSE:To reduce vibration sound generated in a dip tube for heating liquid at the time of controlling combustion of a burner. CONSTITUTION:A dip tube 3 for heating liquid is dipped in liquid 2 contained in a liquid tank 1, one end of the tube 3 is connected to a burner 4, and the other end is opened as an exhaust port 5. A throat (throttle) 6 for generating pressure loss of exhaust gas upon control of combustion of the burner 4 is formed near the port 5 of the tube 3. The throat (throttle) 6 generates the pressure loss of the gas at the time of controlling the combustion of the burner 4 to suppress variation in pressure in the tube, thereby reducing vibration sound due to the variation in the pressure in the tube.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid heating dip tube for heating a liquid when a high temperature combustion gas is passed through the hollow portion while being immersed in the liquid.

[0002]

2. Description of the Related Art Conventionally, a liquid heating apparatus using a liquid heating dip tube for heating a liquid when a combustion gas is passed through the hollow portion while being immersed in the liquid is generally shown in FIG. It is configured as shown in. That is, the liquid heating immersion pipe 23 is immersed in the liquid 22 contained in the liquid tank 21, one end of the liquid heating immersion pipe 23 is connected to the burner 24, and the other end. The end is opened as an exhaust port 25.

In the liquid heating apparatus having the above-mentioned structure, when the burner 24 is combustion-controlled, a high temperature combustion gas is discharged from the exhaust port 25 through the hollow portion of the liquid heating immersion pipe 23. The liquid 22 is heated by receiving heat from the liquid heating dip tube 23.

[0004]

According to the above-mentioned conventional liquid heating apparatus, when the flame of the burner 24 pulsates, the pressure in the liquid heating immersion pipe 23 fluctuates drastically, and the liquid heating immersion pipe 23 is exhausted. There is a problem that a loud vibration noise is liable to be emitted from the port 25 or from the burner fan when the burner 24 is a package burner in accordance with the pressure fluctuation. Therefore, conventionally, a damper or the like is provided near the exhaust port 25 of the liquid heating immersion pipe 23 so as to cause a pressure loss, and means for preventing the above problems by suppressing the above pressure fluctuation is adopted. .

However, even if the damper or the like is installed so as to generate a pressure loss, if the setting position of the damper is deviated due to some abnormality, combustion becomes impossible or the combustion state changes. Combustion troubles may occur in which proper heating cannot be performed.

Therefore, in the present invention, it is a technical subject to reduce vibration noise by a simple structure without providing a mechanical pressure loss means such as a damper, at a low cost, and by means which does not cause a combustion trouble. To do.

[0007]

The technical means for solving the above-mentioned problems is one end of a burner which is immersed in a liquid to be heated and burns by mixing fuel and air supplied from the outside. When the burner is connected to the burner and the burner is controlled, the liquid heating for heating the liquid to be heated in the process of flowing the exhaust gas by the combustion control and discharging the exhaust gas from the exhaust port opened at the other end. In the immersion pipe, a throttle portion for causing a pressure loss of the exhaust gas is formed in a portion near the exhaust gas port.

[0008]

According to the liquid heating immersion pipe described above, since the throttle portion for causing the pressure loss of the exhaust gas is formed in the portion near the exhaust port, the pressure fluctuation in the pipe can be suppressed and the pressure fluctuation in the pipe can be suppressed. It is possible to damp the vibration sound that accompanies it. The portion near the exhaust port includes the case where the exhaust port itself is formed in a throttle shape.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration explanatory view showing an overall configuration of a liquid heating apparatus using a liquid heating dip tube. As shown in FIG. 1, a liquid heating immersion pipe 3 is immersed in a liquid 2 contained in a liquid tank 1, and one end of the liquid heating immersion pipe 3 is a burner 4
And the other end is opened as an exhaust port 5. In the vicinity of the exhaust port 5 of the liquid heating dip pipe 3, a slot (throttle portion) 6 for causing a pressure loss of exhaust gas due to combustion control of the burner 4 is formed. The slot (throttle portion) 6 is provided to reduce vibration noise caused by pulsation of flame when the burner 4 is combustion-controlled in the liquid heating immersion pipe 3. That is, the slot (throttle portion) 6 causes a pressure loss of the exhaust gas due to the combustion control of the burner 4, so that the pressure fluctuation in the liquid heating immersion pipe 3 is suppressed and the vibrating noise is remarkably generated. Will be reduced.

As described above, the slot (throttle portion) 6 formed in the vicinity of the exhaust port 5 of the liquid heating immersion pipe 3 has a mechanical pressure loss mechanism such as a damper as in the conventional case. The structure is extremely simple and inexpensive, and there is no combustion trouble due to fluctuations in the setting position of the damper, so maintenance is extremely simple.

[0011]

As described above, according to the present invention, since the throttle portion for causing the pressure loss due to the burner combustion control is formed in the portion near the exhaust port of the liquid heating immersion pipe, the liquid heating is performed. It is possible to reduce the vibration noise when exhaust gas is exhausted from the exhaust port due to the pulsation of the flame when the burner is combustion-controlled in the immersion pipe with a simple structure at a low cost and without the occurrence of combustion trouble. The effect is that you can do it.

[Brief description of drawings]

FIG. 1 is a layout diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a layout diagram illustrating a conventional technique.

[Explanation of symbols]

 1 liquid tank 2 liquid 3 liquid heating immersion pipe 4 burner 5 exhaust port 6 slot (throttle)

Claims (1)

[Claims] 1. When one end is connected to a burner which is immersed in a liquid to be heated and which mixes and burns fuel and air supplied from the outside and the burner is controlled to burn. A liquid heating immersion pipe for heating the liquid to be heated in a process of flowing the exhaust gas by the combustion control and discharging the exhaust gas from an exhaust port opened at the other end, A liquid heating dip tube characterized in that a throttling portion for forming a pressure loss of exhaust gas is formed.