CN209944402U - Flame detection device, combustion device, and water heater device - Google Patents
Flame detection device, combustion device, and water heater device Download PDFInfo
- Publication number
- CN209944402U CN209944402U CN201920530819.7U CN201920530819U CN209944402U CN 209944402 U CN209944402 U CN 209944402U CN 201920530819 U CN201920530819 U CN 201920530819U CN 209944402 U CN209944402 U CN 209944402U
- Authority
- CN
- China
- Prior art keywords
- flame detection
- flame
- combustion
- sensor
- detection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
The utility model relates to a flame detection device, burner and water heater device. This flame detection device includes: at least two flame detection sensors for detecting a state of a flame; a switching section that switchably connects one of the at least two flame detection sensors to a flame detection circuit; and a flame detection circuit connected to the switching unit and to a microprocessor of the combustion apparatus, for receiving a detection result output from the flame detection sensor connected via the switching unit and transmitting a detection signal related to the detection result to the microprocessor. Therefore, the number of flame detection circuits used can be reduced, the cost can be reduced, and the mounting area can be reduced. In addition, the cost can be further reduced by reducing the number of input ports of the microprocessor.
Description
Technical Field
The utility model relates to a flame detection device, burner and water heater device.
Background
The flame detector is an important device in the gas burner, and has the functions of detecting the combustion condition in real time according to the combustion characteristics of flame, giving a signal in a certain mode once the combustion state of the flame does not meet the normal condition or is flamed out, and stopping fuel supply when fire is extinguished. It is mainly composed of two parts of sensor and signal processor.
The flame detector is mainly composed of a sensor disposed at a position where a flame to be detected is generated, and a flame detection circuit as a signal processing circuit connected between the sensor and a microprocessor. In the case where flames at a plurality of positions are to be detected, a plurality of flame detectors are required, and therefore, a plurality of sensors and a plurality of flame detection circuits are required. For example, as shown in fig. 3, when two flame detection sensors FR1 and FR2 are provided in the water heater, a flame detection circuit IC1 and an flame detection circuit IC2 are provided for each of the two flame detection sensors FR1 and FR2, respectively, and a two-circuit configuration is obtained. Therefore, many devices need to be used, resulting in high cost and large installation area of the flame detector. Further, the microprocessor needs to have a plurality of input ports connected to the plurality of flame detection circuits, respectively, and therefore the cost of the microprocessor also increases.
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
An object of the utility model is to solve above-mentioned problem, provide a reduce cost and reduce installation area's flame detection device, burner and water heater device.
Means for solving the problems
The utility model provides a flame detection device, include: at least two flame detection sensors for detecting a state of a flame; a switching section that switchably connects one of the at least two flame detection sensors to a flame detection circuit; and a flame detection circuit connected to the switching unit and to a microprocessor of the combustion apparatus, for receiving a detection result output from the flame detection sensor connected via the switching unit and transmitting a detection signal related to the detection result to the microprocessor.
Preferably, the at least two flame detection sensors include: a first flame detection sensor, which is disposed at a position suitable for detecting normal combustion, for detecting normal combustion; and a second flame detection sensor disposed at a position suitable for detecting abnormal combustion, for detecting abnormal combustion.
Preferably, when the switching unit periodically switches between connection of the flame detection circuit to the first flame detection sensor and connection of the flame detection circuit to the second flame detection sensor, a connection period between the flame detection circuit and the first flame detection sensor is longer than a connection period between the flame detection circuit and the second flame detection sensor.
Preferably, when the second flame detection sensor detects abnormal combustion, the detection by the second flame detection sensor is continued until a predetermined time elapses.
Preferably, the switching unit periodically switches between connection of the flame detection circuit to the first flame detection sensor and connection of the flame detection circuit to the second flame detection sensor when the combustion apparatus starts combustion.
Preferably, the flame detection circuit is always connected to the first flame detection sensor via the switching unit before the combustion device starts combustion.
The utility model also provides a combustion device, include: the flame detection device described above; and the microprocessor.
The utility model also provides a water heater device, including foretell burner.
Effect of the utility model
According to the utility model discloses, through setting up the switching part that makes a plurality of flame detection sensors switch ground and connect flame detection circuit, consequently, make a plurality of flame detection sensors use a flame detection circuit with the help of a switching part sharing, come to convey the testing result to burner's microprocessor. Therefore, the number of flame detection circuits used can be reduced, the cost can be reduced, and the mounting area can be reduced. In addition, the cost can be further reduced by reducing the number of input ports of the microprocessor.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram for explaining an example of the structure of a combustion apparatus according to the present invention.
Fig. 2 is an IC design diagram for explaining the combustion apparatus of the present invention.
Fig. 3 is a block diagram for explaining an example of the structure of a conventional combustion apparatus.
Description of the reference numerals
1: a combustion device; FR 1: a first flame combustion sensor; FR 2: a second flame combustion sensor; SW 1: a first switch; SW 2: a second switch; IC: a flame detection circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The present invention is an improvement over the prior art based on the discovery that there is little need to monitor flames simultaneously under a suspended structure that detects flames.
Fig. 1 is a block diagram for explaining an example of the structure of a combustion apparatus 1 according to the present invention. As shown in fig. 1, the combustion apparatus 1 provided in the water heater apparatus includes a first flame combustion sensor FR1, a second flame combustion sensor FR2, a first switch SW1, a second switch SW2, a flame detection circuit IC, and a microprocessor.
The first flame combustion sensor FR1 and the second flame combustion sensor FR2 are sensors for detecting the state of flame. A sensor used in a generally known flame detector may be used. Preferably, the first flame combustion sensor FR1 and the second flame combustion sensor FR2 are not both used for detecting normal combustion, but one is used for detecting normal combustion and the other is used for detecting abnormal combustion. For example, the first flame combustion sensor FR1 is provided for detecting normal combustion, and the second flame combustion sensor FR2 is provided for detecting abnormal combustion. For example, the second flame combustion sensor FR2 is a low-number sensor for detecting a self-exhaust cycle.
The first switch SW1 and the second switch SW2 constitute a switching unit, the first switch SW1 is connected to the first flame combustion sensor FR1, and the second switch SW2 is connected to the second flame combustion sensor FR 2. The first switch SW1 and the second switch SW2 are not turned on or off at the same time, but turned on and off mutually exclusively, so that the connection of the flame detection circuit IC and the first flame combustion sensor FR1 and the connection of the flame detection circuit IC and the second flame combustion sensor FR2 are performed switchingly. In addition, if the switches SW1 and SW2 can be controlled by a signal from the microprocessor, the switches SW1 and SW2 may be semiconductor SW or mechanical SW such as a relay.
The flame detection circuit IC is connected to the first switch SW1 and the second switch SW2, is connected to the microprocessor of the combustion apparatus 1, and transmits a detection signal related to a detection result to the microprocessor after receiving the detection result output from the flame detection sensor connected via the first switch SW1 or the second switch SW 2. The flame detection circuit IC includes a voltage application circuit that applies a voltage to the flame sensor, and a detection circuit that processes a detection result of the flame sensor. Since a flame detection circuit used in a generally known flame detector can be used as the flame detection circuit IC, a detailed description thereof will be omitted.
The combustion apparatus 1 further includes a filter for filtering a signal output from the flame detection circuit IC and outputting the filtered signal to the microprocessor, thereby ensuring the quality of the signal.
Next, a flame detection operation of the combustion apparatus will be described.
Since the first flame combustion sensor FR1 is used for detecting normal combustion and the second flame combustion sensor FR2 is used for detecting abnormal combustion, the detection of the first flame combustion sensor FR1 is related to gas leakage, and the detection of the second flame combustion sensor FR2 is merely for improving the accuracy of abnormal detection. That is, the detection of the first flame combustion sensor FR1 and the detection of the second flame combustion sensor FR2 are different in importance, and it is preferable to take more time to perform the detection of the first flame combustion sensor FR1 from the viewpoint of safety.
For the above reasons, the combustion apparatus 1 performs the following control: before the start of combustion, the first switch SW1 is always turned on, that is, the first flame combustion sensor FR1 is always connected to the flame detection circuit IC, so that the detection of the first flame combustion sensor FR1 is always performed; at the start of combustion, the first switch SW1 and the second switch SW2 are periodically switched on, so that the connection between the first flame combustion sensor FR1 and the flame detection circuit IC and the connection between the second flame combustion sensor FR2 and the flame detection circuit IC are periodically switched.
In view of FR1 for confirming normal combustion and FR2 for improving the abnormal state detection accuracy, it is preferable that the connection period of the flame detection circuit IC and the first flame detection sensor FR1 be longer than the connection period of the flame detection circuit IC and the second flame detection sensor FR 2. For example, the second flame detection sensor FR2 may be monitored for a short time, and the first flame detection sensor FR1 may be monitored for the rest of the time. In this case, for example, the second flame detection sensor FR2 may be monitored for 1 second every 30 seconds, and the first flame detection sensor FR1 may be monitored during the 30 seconds.
Further, if the second flame detection sensor FR2 detects an abnormal value, the second flame detection sensor FR2 may continue to monitor until the error determination time elapses. For example, the error determination time may be set to 10 seconds.
In the present embodiment, since the switching unit is provided to connect the plurality of flame detection sensors to the flame detection circuit in a switching manner, the plurality of flame detection sensors share the single flame detection circuit by the single switching unit, and the detection result is transmitted to the microprocessor of the combustion apparatus. Therefore, the number of flame detection circuits used can be reduced, the cost can be reduced, and the mounting area can be reduced. In addition, the cost can be further reduced by reducing the number of input ports of the microprocessor.
In addition, by shortening the connection time with the flame detection sensor for detecting abnormal combustion, it is possible to determine normal combustion for a long period of time, thereby further improving safety. Further, by continuing monitoring by the flame detection sensor when an abnormality is detected by the flame detection sensor that detects abnormal combustion, it is possible to reliably recognize an error from detection over a longer period of time.
In addition, in the present embodiment, two flame detection sensors are provided, but the present invention is not limited to this, and three or more flame detection sensors may be provided. In the present embodiment, the switching unit is implemented by the first switch SW1 and the second switch SW2, but is not limited to this, and may be implemented by another structure such as a single-pole double-throw switch. In the present embodiment, the combustion apparatus 1 is provided in the water heater apparatus, but is not limited thereto, and may be provided in other apparatuses related to combustion.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A flame detection device, comprising:
at least two flame detection sensors for detecting a state of a flame;
a switching section that switchably connects one of the at least two flame detection sensors to a flame detection circuit; and
and a flame detection circuit connected to the switching unit and to a microprocessor of the combustion apparatus, for receiving a detection result output from the flame detection sensor connected via the switching unit and transmitting a detection signal related to the detection result to the microprocessor.
2. The flame detection device of claim 1,
the at least two flame detection sensors include:
a first flame detection sensor, which is disposed at a position suitable for detecting normal combustion, for detecting normal combustion; and
and a second flame detection sensor disposed at a position suitable for detecting abnormal combustion, for detecting abnormal combustion.
3. The flame detection device of claim 2,
when the switching unit periodically switches between connection of the flame detection circuit and the first flame detection sensor and connection of the flame detection circuit and the second flame detection sensor, a connection period between the flame detection circuit and the first flame detection sensor is longer than a connection period between the flame detection circuit and the second flame detection sensor.
4. The flame detection device of claim 3,
when the second flame detection sensor detects abnormal combustion, the detection by the second flame detection sensor is continued until a prescribed time elapses.
5. The flame detection device of claim 3,
when the combustion apparatus starts combustion, the switching unit periodically switches between connection of the flame detection circuit and the first flame detection sensor and connection of the flame detection circuit and the second flame detection sensor.
6. The flame detection device according to any one of claims 2 to 5,
the flame detection circuit is always connected to the first flame detection sensor via the switching unit before the combustion device starts combustion.
7. A combustion apparatus, comprising:
a flame detection device according to any of claims 1 to 6; and
the microprocessor.
8. A water heater apparatus, characterized in that it comprises a combustion apparatus according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920530819.7U CN209944402U (en) | 2019-04-18 | 2019-04-18 | Flame detection device, combustion device, and water heater device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920530819.7U CN209944402U (en) | 2019-04-18 | 2019-04-18 | Flame detection device, combustion device, and water heater device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209944402U true CN209944402U (en) | 2020-01-14 |
Family
ID=69128535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920530819.7U Active CN209944402U (en) | 2019-04-18 | 2019-04-18 | Flame detection device, combustion device, and water heater device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209944402U (en) |
-
2019
- 2019-04-18 CN CN201920530819.7U patent/CN209944402U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101311950B1 (en) | Fire detecing and alarm system | |
| RU2620364C2 (en) | System of high voltage and appropriate control method | |
| CN209944402U (en) | Flame detection device, combustion device, and water heater device | |
| KR101796841B1 (en) | Building monitoring system and the operating method therefor | |
| JP3539536B2 (en) | Fire alarm system | |
| CN100504947C (en) | Hazard detector | |
| CN110196112B (en) | Ignition equipment state detection method and fire detector using same | |
| KR100355656B1 (en) | Electric leakage detector and its displaying device possible for fabric analysis | |
| KR20120137855A (en) | Sensing circuit for mailfunction of data line of multi-drop communication circuit | |
| JP2018082566A (en) | Earthquake sensitive shutoff system | |
| JP3868700B2 (en) | Protective relay | |
| JP2005234707A (en) | Gas leakage monitoring device | |
| KR200212436Y1 (en) | Electric leakage detector and its displaying device possible for fabric analysis | |
| KR101864037B1 (en) | Cooking appliance and controlling method thereof | |
| CN110917528A (en) | Cable fire protection judgment method and system for fire protection linkage | |
| JP3116556U (en) | Misfire detection device | |
| JP7109861B2 (en) | circuit breaking system | |
| JPS6344673Y2 (en) | ||
| JPS6318409B2 (en) | ||
| KR20130141238A (en) | Failure detecting apparatus of a-d converter for digital protection relay | |
| CN111001115A (en) | Fire protection judgment method and system for fire-fighting linkage transformer | |
| JP2517864Y2 (en) | Disaster prevention repeater | |
| KR870001376Y1 (en) | Safty device of group monitor control of gas apparatus | |
| JPH0378001A (en) | Controller | |
| JPH01205299A (en) | Fire alarm device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |