CN110873462B - Carbon deposition reminding control method for gas water heater with carbon deposition reminding function - Google Patents
Carbon deposition reminding control method for gas water heater with carbon deposition reminding function Download PDFInfo
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- CN110873462B CN110873462B CN201810996631.1A CN201810996631A CN110873462B CN 110873462 B CN110873462 B CN 110873462B CN 201810996631 A CN201810996631 A CN 201810996631A CN 110873462 B CN110873462 B CN 110873462B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 112
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 75
- 230000008021 deposition Effects 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 22
- 239000002737 fuel gas Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 239000012459 cleaning agent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
A carbon deposition reminding control method of a gas water heater with a carbon deposition reminding function comprises the following steps: (1) Initializing, setting, and recording an initial load value phi of full-load combustion of the water heater when leaving a factory by an electric control board x Recording the initial value P of the pressure difference detected by the wind pressure sensor (9) x The method comprises the steps of carrying out a first treatment on the surface of the (2) When the water heater is used, the electric control board calculates the current load value phi of the water heater during full-load combustion i From the current pressure difference P i The method comprises the steps of carrying out a first treatment on the surface of the (3) Comparing the current value with the initial value, and judging whether the condition is satisfied: phi i <A×Φ x And P is i ＞B×P x Wherein A and B are constants; if the conditions are met, the water heater sends out a warning of carbon deposition; if not, returning to the step (2). The invention has the advantages that: the load value of the gas water heater in full-load combustion is calculated and compared with the initial load value, and the pressure difference change of the upper part and the lower part of the cooling fin is combined to accurately judge whether the carbon deposition phenomenon exists or not, so that the carbon deposition phenomenon of the gas water heater can be detected at the initial stage of carbon deposition formation, and an automatic prompt and alarm are carried out to avoid the deterioration of the carbon deposition phenomenon.
Description
Technical Field
The invention relates to a gas water heater device and a fault detection method, in particular to a carbon deposition reminding control method of a gas water heater with a carbon deposition reminding function.
Background
The gas water heater is a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode so as to achieve the purpose of preparing hot water. In general, the gas water heater mainly comprises a valve body assembly, a main burner, a small fire burner, a heat exchanger, a safety device and the like, and further comprises a flue type water heater flue and a forced-air device of the forced-air water heater.
In the use process, when the fuel gas is not completely combusted, redundant carbon is adsorbed on the radiating fins of the heat exchanger to form carbon deposit. The channel is blocked when carbon deposition is formed, the air in combustion is reduced, the combustion environment is deteriorated, and the carbon deposition speed is further increased. Once carbon deposition is formed on the radiating fins, the heat exchange effect can be affected, when the carbon deposition is too much, the water flowing through the heat exchanger can not carry away high temperature due to poor heat exchange effect, and the heat exchanger can be burnt through, so that the use safety of the water heater is directly affected.
In the prior art, the method for solving the problem of carbon deposition is mainly to remove the carbon deposition by a cleaning agent, for example, the existing Chinese patent No. ZL96102892.0, namely the carbon deposition cleaning agent for gas water heater, relates to a carbon deposition cleaning agent for gas water heater, and the carbon deposition cleaning agent for gas water heater can be used for removing carbon deposition of gas water heater so as to enable gas to be fully combusted, thereby preventing poisoning accidents and improving thermal efficiency.
However, the gas water heater is not provided with the function of carbon deposition reminding at present, whether carbon deposition exists can only be found by manual experience or after faults occur, and the service life of the water heater is greatly reduced and even serious potential safety hazards exist due to insufficient combustion of many users.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a gas water heater with carbon deposition reminding function capable of realizing automatic reminding aiming at the current state of the art.
Another technical problem to be solved by the present invention is to provide a carbon deposition reminding control method for the gas water heater according to the above state of the art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a take gas heater that carbon deposition reminded, is including the combustion chamber, be located the heat exchanger of combustion chamber top, let in the intake pipe of combustion chamber and pass the waterway pipeline of heat exchanger, wherein, waterway pipeline is including the inlet tube and the outlet pipe of mutual intercommunication, still be provided with the fin on the waterway pipeline, its characterized in that: the water inlet pipe is sequentially provided with a water flow sensor and a water inlet temperature sensor at a water inlet, and the water outlet pipe is provided with a water outlet temperature sensor at a water outlet; the radiating fins are arranged on the waterway pipeline in the heat exchanger at intervals, and the heat exchanger is provided with a wind pressure sensor capable of detecting wind pressure difference values of the upper end and the lower end of the radiating fins.
For the convenience of the installation and the disassembly and the replacement of the wind pressure sensor, as the optimization, a first detection port and a second detection port are formed in the same side part of the heat exchanger, the first detection port is positioned at the top of the radiating fin, the second detection port is positioned at the bottom of the radiating fin, and the first detection port and the second detection port are respectively connected with two detection ends of the wind pressure sensor.
In order to adjust the size of the gas inflow, the gas inlet pipe is preferably further provided with a gas proportional valve.
Preferably, a burner and a fan are arranged in the combustion chamber, and the fuel gas is introduced into the burner through a fuel gas proportional valve controlled by an electromagnetic valve by an air inlet pipe.
The technical scheme adopted by the invention for solving the other technical problem is as follows: the carbon deposition reminding control method for the gas water heater is characterized by comprising the following steps of:
(1) Initializing, setting, and recording an initial load value phi of full-load combustion of the water heater when leaving a factory by an electric control board x At the same time, the initial value P of the pressure difference detected by the wind pressure sensor is recorded x ；
(2) When the water heater is used, the electric control board calculates the current load value phi of the water heater during full-load combustion i From the current pressure difference P i ；
(3) Comparing the current value with the initial value, and judging whether the condition is satisfied: phi i <A×Φ x And P is i ＞B×P x Wherein A and B are constants; if the conditions are met, the water heater sends out a warning of carbon deposition; if not, returning to the step (2).
In order to timely react when carbon deposition occurs and avoid false alarm to influence user experience, the value range of the constant A is preferably 0.85-0.9, and the value range of the constant B is preferably 1.1-1.2. The value of A reflects the severity of carbon deposition, if the value of A is too small, the carbon deposition is possibly serious, the machine does not send an alarm yet, the machine is damaged and cannot be maintained, and if the value of A is too large, the alarm is sent only by a little carbon deposition, the sensitivity is too high, and the user experience is affected.
Preferably, a calculation formula of a load value Φ of the water heater during full load combustion is Φ= (T) out -T in ) XQ/25, where T out T is the temperature of water outlet in For the water inlet temperature, Q is the water flow detected by the water flow sensor. The formula can be understood as the amount of hot water flowing out per minute when the temperature rise of the gas water heater is converted into 25K, namely the output power of the water heater.
Compared with the prior art, the invention has the advantages that: through setting up water sensor and temperature sensor in the water route, calculate the load value of gas heater when full load burns and compare with initial load value, set up wind pressure sensor simultaneously, combine the pressure differential variation about the fin, come accurate judgement to have the carbon phenomenon, testing arrangement simple to operate, with low costs, the test method is simple easy to operate, it has carbon phenomenon to just detect gas heater at carbon formation initial stage, and automatic suggestion warning, avoid carbon phenomenon to worsen, prevent serious carbon damage machine, extension machine life and improvement safety in utilization.
Drawings
FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The phenomenon of carbon deposition of the gas water heater is caused by the adhesion of granular carbon particles formed by incomplete combustion of gas between the radiating fins 8, and once the carbon deposition is formed, the carbon deposition is difficult to eliminate. Carbon deposition is attached to the radiating fins 8, so that heat after combustion can be prevented from being transferred to the radiating fins 8, heat cannot be transferred to water in the heat exchange tube, heat transfer efficiency is reduced finally, output power of water heating is reduced, and in addition, the carbon deposition can also cause unsmooth smoke discharge, so that the safety of the water heater is seriously affected.
As shown in fig. 1, the embodiment provides a gas water heater with carbon deposition reminding, which comprises a combustion chamber 1, a heat exchanger 2 positioned above the combustion chamber 1, an air inlet pipe 11 communicated with the combustion chamber 1 and a waterway pipeline passing through the heat exchanger 2, wherein the combustion chamber 1 is internally provided with a combustor 3 and a fan 4, in order to adjust the size of the gas inflow, the air inlet pipe 11 is also provided with a gas proportional valve 5, and gas is input through an air inlet 12 of the air inlet pipe 11 and is communicated into the combustion chamber 1 after passing through the gas proportional valve 5 controlled by an electromagnetic valve;
the water channel pipeline is in an inverted U shape and comprises a water inlet pipe 6 and a water outlet pipe 7 which are mutually communicated, a radiating fin 8 is further arranged on the water channel pipeline, a water flow sensor 62 and a water inlet temperature sensor 63 are sequentially arranged on the water inlet pipe 6 at the water inlet 61, and a water outlet temperature sensor 72 is arranged on the water outlet pipe 7 at the water outlet 71; the cooling fins 8 are arranged on the waterway pipeline (namely the horizontal part of the U-shaped waterway pipeline) in the heat exchanger 2 at intervals, and the heat exchanger 2 is also provided with a wind pressure sensor 9 which can detect the wind pressure difference value of the upper end and the lower end of the cooling fins 8.
For the convenience of the installation and the disassembly and replacement of the wind pressure sensor 9, the heat exchanger 2 is provided with a first detection port and a second detection port on the same side, the first detection port is located at the top of the radiating fin 8 and used for testing a first wind pressure point P1 at the top of the radiating fin 8, the second detection port is located at the bottom of the radiating fin 8 and used for testing a second wind pressure point P2 at the bottom of the radiating fin 8, the first detection port and the second detection port are respectively connected with two detection ends of the wind pressure sensor 9, when carbon deposition occurs, the pressure value of the first wind pressure point P1 (far away from the fan 4) can be reduced, and the second wind pressure point P2 (close to the fan 4) can be increased.
The embodiment adopts the gas water heater to realize carbon deposition reminding, and the control method of the carbon deposition reminding comprises the following steps:
(1) Initializing, setting, and recording an initial load value phi of full-load combustion of the water heater when leaving a factory by an electric control board x At the same time, the initial value P of the pressure difference detected by the wind pressure sensor 9 at the time of full load combustion at the time of shipment is recorded x ；
(2) When the water heater is actually used, the electric control board calculates the current load value phi of the water heater during full-load combustion i From the current pressure difference P i ；
(3) Comparing the current value with the initial value, and judging whether the condition is satisfied: phi i <A×Φ x And P is i ＞B×P x Wherein A and B are constants, and preferably, the value range of the constant A is 0.85-0.9, and the value range of the constant B is 1.1-1.2; if the conditions are met, the water heater sends out a warning of carbon deposition; if not, returning to the step (2), and continuously monitoring the current load value phi x 。
In order to timely react when carbon deposition occurs and avoid affecting user experience, wherein the value of A reflects the severity of the carbon deposition, if the value of A is too small (less than 0.5), the carbon deposition can be serious, and the machine does not send an alarm yet, so that the machine is damaged and cannot be maintained; if the value A is too large (is too close to 1), an alarm can be given as long as a bit of carbon deposit exists, and the alarm sensitivity is too high, so that the user experience can be influenced; the specific values of a and B can be determined through experiments, and in this embodiment, preferably, a=0.9 and b=1.2 are more reasonable.
When the water heater burns under full load, the current of the fuel gas proportional valve 5 is maximum, and the calculation formula of the load value phi (namely the output power of the water heater) is phi= (T) out -T in ) XQ/25 (initial load value phi) x And the current load value phi i All using this calculation formula), wherein T out T is the temperature of water outlet in Q is water flow detected by a water flow sensor for the water inlet temperature; the formula can be understood as the amount of hot water flowing out per minute when the temperature rise of the gas water heater is converted into 25K, namely the output power of the water heater.
The gas water heater of the embodiment is provided with a water flow sensor 62 at a water inlet 61, a water inlet temperature sensor 63 and a water outlet 71 with a water outlet temperature sensor 72; the heat exchanger 2 has cooling fins 8 with wind pressure sampling points connected to wind pressure sensor 9 for testing the wind pressure difference between the cooling fins 8. In the using process of the gas water heater, the output power of the gas water heater can be greatly reduced under two conditions, namely, carbon deposition occurs, and the gas pressure is insufficient; by comparing the load value with the initial load value when leaving the factory, the output power is confirmed to be greatly reduced, and then the carbon deposition is proved by the pressure difference change, because the pressure difference change cannot occur when the air pressure of the user is reduced. According to the embodiment, the phenomenon of carbon deposition of the gas water heater can be detected at the initial stage of carbon deposition formation, automatic alarm prompt is realized, carbon deposition cleaning is timely carried out, the deterioration of the phenomenon of carbon deposition is avoided, the use safety of the water heater is improved, and the service life of equipment is prolonged.
Claims (6)
1. The utility model provides a take carbon deposition to remind gas heater's carbon deposition to remind control method, gas heater including combustion chamber (1), be located heat exchanger (2) of combustion chamber (1) top, intake pipe (11) and the water route pipeline that passes heat exchanger (2) of leading into combustion chamber (1), wherein, water route pipeline is including inlet tube (6) and outlet pipe (7) that communicate each other, still be provided with fin (8) on the water route pipeline, its characterized in that: the water inlet pipe (6) is sequentially provided with a water flow sensor (62) and a water inlet temperature sensor (63) at the water inlet (61), and the water outlet pipe (7) is provided with a water outlet temperature sensor (72) at the water outlet (71); the radiating fins (8) are arranged on a waterway pipeline positioned in the heat exchanger (2) at intervals, and the heat exchanger (2) is provided with a wind pressure sensor (9) capable of detecting wind pressure difference values of the upper end and the lower end of the radiating fins (8);
the control method comprises the following steps:
(1) Initializing, setting, and recording an initial load value phi of full-load combustion of the water heater when leaving a factory by an electric control board x At the same time, the initial value P of the pressure difference detected by the wind pressure sensor (9) is recorded x ；
(2) When the water heater is used, the electric control board calculates the current load value phi of the water heater during full-load combustion i From the current pressure difference P i ；
(3) Comparing the current value with the initial value, and judging whether the condition is satisfied: phi i <A×Φ x And P is i ＞B×P x Wherein A and B are constants; if the conditions are met, the water heater sends out a warning of carbon deposition; if not, returning to the step (2).
2. The carbon deposition reminding control method for the gas water heater with the carbon deposition reminding function according to claim 1, wherein the method comprises the following steps of: the value range of the constant A is 0.85-0.9, and the value range of the constant B is 1.1-1.2.
3. The carbon deposition reminding control method for the gas water heater with the carbon deposition reminding function according to claim 1, wherein the method comprises the following steps of: the calculation formula of the load value phi of the water heater in full-load combustion is phi= (T) out -T in ) XQ/25, where T out T is the temperature of water outlet in For the water inlet temperature, Q is the water flow detected by the water flow sensor.
4. The carbon deposition reminding control method for the gas water heater with the carbon deposition reminding function according to claim 1, wherein the method comprises the following steps of: the heat exchanger (2) is provided with a first detection port and a second detection port on the same side part, the first detection port is positioned at the top of the radiating fin (8), the second detection port is positioned at the bottom of the radiating fin (8), and the first detection port and the second detection port are respectively connected with two detection ends of the wind pressure sensor (9).
5. The carbon deposition reminding control method for the gas water heater with the carbon deposition reminding function according to claim 1, wherein the method comprises the following steps of: the air inlet pipe (11) is also provided with a fuel gas proportional valve (5).
6. The carbon deposition reminding control method for the gas water heater with the carbon deposition reminding function according to claim 1, wherein the method comprises the following steps of: a burner (3) and a fan (4) are arranged in the combustion chamber (1).
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| CN201810996631.1A CN110873462B (en) | 2018-08-29 | 2018-08-29 | Carbon deposition reminding control method for gas water heater with carbon deposition reminding function |
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| CN201810996631.1A CN110873462B (en) | 2018-08-29 | 2018-08-29 | Carbon deposition reminding control method for gas water heater with carbon deposition reminding function |
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