CN210486115U - Gas combustion equipment - Google Patents

Abstract

The utility model discloses a gas combustion equipment. This gas combustion apparatus includes: a burner having a combustion chamber and having a flame when combusted; an ultraviolet flame detector for detecting ultraviolet light of the flame and a flicker frequency of the flame, the ultraviolet flame detector including a sensitive element adapted to receive the ultraviolet light. According to the utility model discloses a gas combustion equipment judges whether the flame in the combustor has ultraviolet ray and whether satisfies specific flame flicker frequency through ultraviolet flame detector, only when detecting that ultraviolet ray and ultraviolet ray intensity change frequency accord with the numerical value interval of normal combustion, could explain that the gas in the combustor is in normal combustion state. The gas combustion equipment can quickly and accurately determine whether the gas in the combustor is normally combusted.

Description

Gas combustion equipment

Technical Field

The utility model relates to a water heater field particularly, relates to a gas combustion equipment.

Background

The commonly used flame detection technology of gas combustion equipment mainly comprises flame ion detection and thermocouple thermoelectric potential detection. The thermocouple thermoelectric voltage response process is too slow. Flame ion detection reaction time is faster than a thermocouple, but detection failure can be caused in a humid environment, when an ion sensing needle is too close to or too far away from flame, a flame signal can not be detected easily, fault misinformation can be generated in the above conditions, gas combustion equipment is stopped to operate, and normal use of a user is affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a gas combustion equipment can confirm whether normal combustion of gas in the combustor fast, accurately.

According to the utility model discloses gas combustion equipment, include: a burner having a combustion chamber and having a flame when combusted; an ultraviolet flame detector for detecting ultraviolet light of the flame and a flicker frequency of the flame, the ultraviolet flame detector including a sensitive element adapted to receive the ultraviolet light.

According to the utility model discloses a gas combustion equipment judges whether the flame in the combustor has ultraviolet ray and whether satisfies specific flame flicker frequency through ultraviolet flame detector, only when detecting that ultraviolet ray and ultraviolet intensity change frequency accord with the numerical value interval of normal combustion, just can explain that the gas in the combustor is in normal combustion state. The gas combustion equipment can quickly and accurately determine whether the gas in the combustor is normally combusted.

According to some embodiments of the utility model, the gas combustion apparatus still includes: an optical fiber that transmits ultraviolet light within the combustion chamber to the sensing element.

Further, the gas combustion apparatus further comprises: the high-temperature-resistant lens at least partially extends into the combustion chamber and is used for gathering the ultraviolet rays to the head of the optical fiber, and the tail of the optical fiber is connected with the sensitive element.

Furthermore, a fixing support is arranged on the shell of the combustor, and the high-temperature-resistant lens is fixed on the fixing support.

According to some embodiments of the invention, the sensing element is a solid detection element or a gas detection element.

According to some embodiments of the invention, the ultraviolet flame detector further comprises a control processing unit, the sensing element being electrically connected to the control processing unit.

Further, the gas combustion apparatus further comprises: and the control processing unit is electrically connected with the controller.

According to some embodiments of the invention, the ultraviolet flame detector is disposed outside the combustion chamber.

According to some embodiments of the invention, the ultraviolet flame detector detects ultraviolet light in a wavelength range of 200nm to 400 nm.

According to some embodiments of the present invention, the flickering frequency of the flame is positively correlated to the variation frequency of the intensity of the ultraviolet light, and the flickering frequency range of the flame is 10Hz to 200Hz when the burner is in a normal combustion state.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic diagram of a gas combustion device;

fig. 2 is a logic diagram of the controller.

Reference numerals:

the device comprises a combustor 1, a combustion chamber 11, a fixed support 12, an ultraviolet flame detector 2, a sensitive element 21, a control processing unit 22, an optical fiber 3, a high-temperature-resistant lens 4, a controller 5 and a gas combustion device 10.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

A gas combustion apparatus according to an embodiment of the present invention will be described in detail below with reference to fig. 1 to 2.

Referring to fig. 1, the gas combustion apparatus 10 includes: a burner 1 and an ultraviolet flame detector 2.

The burner 1 has a combustion chamber 11, and the burner 1 has a flame when burning.

The ultraviolet flame detector 2 is used for detecting ultraviolet rays of a flame and a flicker frequency of the flame, the ultraviolet flame detector 2 comprises a sensor 21, and the sensor 21 is adapted to receive the ultraviolet rays.

Fuel such as oil or gas can be burned in the combustion chamber 11, and a large amount of ultraviolet rays can be radiated from the burning flame. When the flame burns, the light radiation intensity is fluctuated, for example, the light radiation intensity can be fluctuated by the mixing ratio of fuel and air, tiny explosion during the combustion, pressure change and the like, the fluctuation is called the flicker frequency of the flame, the change frequency of the ultraviolet intensity can reflect the flicker frequency of the flame, and the flicker frequency of the flame during normal combustion is distributed in a specific interval.

The sensing element 21 in the ultraviolet flame detector 2 can detect whether ultraviolet rays exist in the flame in the combustion chamber 11, and can judge the flicker frequency of the flame according to the change frequency of the intensity of the ultraviolet rays.

According to the utility model discloses a gas combustion apparatus 10 judges through ultraviolet flame detector 2 whether the flame in combustor 1 exists the ultraviolet ray and whether satisfies specific flame flicker frequency, only when detecting that ultraviolet ray and ultraviolet ray intensity change frequency accord with the numerical value interval of normal burning, just can explain that the gas in combustor 1 is in normal combustion state. The gas combustion apparatus 10 can quickly and accurately determine whether the gas in the burner 1 is normally combusted.

The gas combustion device 10 further comprises: an optical fiber 3. The optical fiber 3 transmits the ultraviolet rays in the combustion chamber 11 to the sensing element 21, and the optical fiber 3 has a light transmitting function and a small light loss.

Specifically, the high-temperature resistant optical fiber 3 can transmit ultraviolet rays in the combustion chamber 11 to the sensing element 21 far away from the combustion chamber 11, so that the high temperature of the sensing element 21 far away from the combustion chamber 11 is facilitated, and the measurement accuracy and the service life of the sensing element 21 are further facilitated to be improved.

The gas combustion device 10 further comprises: the high-temperature-resistant lens 4, the high-temperature-resistant lens 4 stretches into the combustion chamber 11 at least partially, and the high-temperature-resistant lens 4 is used for gathering ultraviolet rays to the head of the optical fiber 3, and the tail of the optical fiber 3 is connected with the sensitive element 21.

High temperature resistant lens 4 has functions such as high temperature resistant, gathering light, and high temperature resistant lens 4 can normally work under high temperature environment, and high temperature resistant lens 4 can gather the light in the combustion chamber 11 to give optical fiber 3 rather than being connected with light transfer, contained the ultraviolet ray in the light, high temperature resistant lens 4 just gives optical fiber 3 with ultraviolet ray transfer from this.

The shell of the combustor 1 is provided with a fixing support 12, and the high-temperature resistant lens 4 is fixed on the fixing support 12, so that the high-temperature resistant lens 4 is installed and fixed in the combustor 1.

The fixed support 12 can be arranged on the shell of the burner 1 orthogonal to the height of the flame, thereby being beneficial to better collecting the ultraviolet rays generated by combustion by the high-temperature resistant lens 4 fixed on the fixed support 12 and further being beneficial to improving the accuracy of the ultraviolet flame detector 2 in judging the combustion state.

The sensor 21 is a solid sensor or a gas sensor, in other words, a solid substance can be used as the sensor 21, for example, the sensor 21 can be silicon carbide or aluminum nitrate, or a gas-filled tube can be used as the sensor 21, and the gas in the gas-filled tube can be used as a detection medium, for example, the sensor 21 can be a geiger-miller tube.

The ultraviolet flame detector 2 further comprises a control processing unit 22, and the sensing element 21 is electrically connected with the control processing unit 22. The sensing element 21 may transmit the detected result to the control processing unit 22 in the form of an analog signal.

The gas combustion device 10 further comprises: and a controller 5, wherein the control processing unit 22 is electrically connected with the controller 5.

The control processing unit 22 can convert the analog signal input by the sensor 21 into a digital signal and transmit the digital signal to the controller 5, the controller 5 can directly identify the content of the digital signal, the content of the digital signal transmitted by the control processing unit 22 is the presence or absence of the ultraviolet ray and the intensity change frequency of the ultraviolet ray in the combustion chamber 11 detected by the sensor 21 at the present moment, only when the ultraviolet ray is detected and the intensity change frequency of the ultraviolet ray conforms to the set value (i.e., the above-mentioned numerical value interval) of the normal combustion, the controller 5 can execute the normal operation program, otherwise, the flameout control program is executed.

The ultraviolet flame detector 2 is arranged outside the combustion chamber 11, so that the ultraviolet flame detector 2 is favorable for being far away from the high temperature of the combustion chamber 11, electric elements are prevented from being damaged due to the high temperature, and the measuring precision and the service life of the sensitive element 21 are further favorably improved.

The ultraviolet wavelength range detected by the ultraviolet flame detector 2 is 200nm-400 nm.

The wavelength of the ultraviolet light emitted from the flame that is normally burned is concentrated between 200nm and 400nm, in other words, the ultraviolet flame detector 2 detects that the wavelength of the ultraviolet light in the combustion chamber 11 is in the range of 200nm to 400nm, and it can be determined that the gas in the combustion chamber 11 is burned. Beyond this range, the gas is in a non-combusted state.

When the burner 1 burns, the flicker frequency of the flame is positively correlated with the intensity change frequency of the ultraviolet rays, and when the burner is in a normal combustion state, the flicker frequency range of the flame is 10Hz-200 Hz.

The flickering frequency of the flame in the normal combustion is distributed between 10Hz-200Hz, in other words, the ultraviolet flame detector 2 detects that the flickering frequency of the flame in the combustion chamber 11 is distributed between 10Hz-200Hz, and the ultraviolet wavelength range is between 200nm-400nm, so that it can be determined that the gas in the combustion chamber 11 is in a normal combustion state, and if the ultraviolet wavelength range is beyond the normal combustion state, the gas is in an abnormal combustion state.

Referring to the control logic diagram of the controller 5 shown in fig. 2, when the gas combustion apparatus 10 is operated, after the controller 5 operates the ignition control program, if the ultraviolet flame detector 2 does not detect ultraviolet rays or the detected flame flicker frequency does not meet the set value, the flame-out control program is executed, and only when the ultraviolet flame detector 2 detects ultraviolet rays and the intensity change frequency of the ultraviolet rays meets the set value for normal combustion, the controller 5 executes the normal operation program. The gas combustion device 10 can quickly and accurately determine whether the gas in the combustor 1 is normally combusted, and can immediately stop gas supply in an abnormal combustion state, thereby being beneficial to improving the safety performance of the gas combustion device 10.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A gas combustion device, characterized by comprising:

a burner having a combustion chamber and having a flame when combusted;

an ultraviolet flame detector for detecting ultraviolet light of the flame and a flicker frequency of the flame, the ultraviolet flame detector including a sensitive element adapted to receive the ultraviolet light.

2. The gas combustion device as in claim 1, further comprising: an optical fiber that transmits ultraviolet light within the combustion chamber to the sensing element.

3. The gas combustion device as in claim 2, further comprising: the high-temperature-resistant lens at least partially extends into the combustion chamber and is used for gathering the ultraviolet rays to the head of the optical fiber, and the tail of the optical fiber is connected with the sensitive element.

4. The gas combustion device as in claim 3, wherein a fixing bracket is provided on the housing of the burner, said lens being fixed on said fixing bracket.

5. The gas combustion device according to claim 1, wherein said sensitive element is a solid detecting element or a gas detecting element.

6. The gas combustion device according to claim 1, wherein said ultraviolet flame detector further comprises a control processing unit, said sensitive element being electrically connected to said control processing unit.

7. The gas combustion device as in claim 6, further comprising: and the control processing unit is electrically connected with the controller.

8. The gas combustion device according to claim 1, wherein said ultraviolet flame detector is arranged outside said combustion chamber.

9. The gas combustion device as claimed in claim 1, wherein the ultraviolet flame detector detects ultraviolet light in a wavelength range of 200nm to 400 nm.

10. The gas combustion device as claimed in claim 1, wherein the flickering frequency of the flame is positively correlated to the intensity variation frequency of the ultraviolet rays, and the flickering frequency of the flame ranges from 10Hz to 200Hz when the burner is in a normal combustion state.

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