CN109059290B - Condensing type gas heating and bathing dual-purpose furnace and control method thereof - Google Patents
Condensing type gas heating and bathing dual-purpose furnace and control method thereof Download PDFInfo
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- CN109059290B CN109059290B CN201810806043.7A CN201810806043A CN109059290B CN 109059290 B CN109059290 B CN 109059290B CN 201810806043 A CN201810806043 A CN 201810806043A CN 109059290 B CN109059290 B CN 109059290B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 43
- 238000003287 bathing Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 217
- 239000007789 gas Substances 0.000 claims abstract description 50
- 238000009833 condensation Methods 0.000 claims abstract description 33
- 230000005494 condensation Effects 0.000 claims abstract description 33
- 239000000779 smoke Substances 0.000 claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003546 flue gas Substances 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000008236 heating water Substances 0.000 claims description 40
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000003517 fume Substances 0.000 claims description 10
- 239000002737 fuel gas Substances 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- 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
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
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- 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
- F24H9/0005—Details for water heaters
-
- 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
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- 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)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a condensing type gas heating and bathing dual-purpose furnace and a control method thereof, wherein the condensing type gas heating and bathing dual-purpose furnace comprises a burner, a smoke discharging channel, a main controller, a main heat exchanger, a plate heat exchanger, a condensing heat exchanger, a temperature sensor, an electric control valve, a bypass pipe and a circulating water pump; when the feedback temperature of the temperature sensor is lower than the set temperature range, the electric control valve is slowly opened, the opening of the bypass pipe is increased, more high-temperature hot water is mixed with the low-temperature hot water passing through the condensation heat exchanger through the bypass pipe, and the water temperature before entering the main heat exchanger is increased; when the feedback temperature of the temperature sensor is higher than the set temperature range, the electric control valve is slowly closed, the opening of the bypass pipe is reduced, the mixing of high-temperature hot water and low-temperature hot water after passing through the secondary condenser is reduced, and the water temperature before entering the main heat exchanger is reduced. Therefore, the invention can ensure that the temperature before entering the main heat exchanger is always maintained in a proper temperature range, ensure that the vapor in the flue gas can not be condensed on the main heat exchanger, and ensure reasonable heat efficiency.
Description
Technical Field
The invention belongs to the field of gas heating water heaters or water heaters, and particularly relates to a condensing gas heating and bathing dual-purpose furnace and a control method thereof.
Background
In the prior art, in a gas heating water heater or a water heater with a secondary condensation heat exchanger, the temperature before entering a main heat exchanger is influenced by the temperature of water outlet and the resistance of a system, and the water vapor in the flue gas cannot be condensed in the main heat exchanger under ideal (test) conditions, but cannot be practically ensured not to generate condensation in the main heat exchanger.
Disclosure of Invention
The invention aims to provide a condensing type gas heating and bathing dual-purpose furnace and a control method thereof, which can effectively prevent water vapor in flue gas from condensing in a main heat exchanger.
In order to solve the technical problems, one aspect of the invention provides a condensing type gas heating and bathing dual-purpose furnace, which comprises a burner, a fan, a fume collecting hood, a fume exhaust channel, a main controller, a main heat exchanger, a plate heat exchanger, a condensing heat exchanger, a first temperature sensor, an electric control valve, a bypass pipe, a circulating water pump, a heating water outlet, a heating water return port, a bathroom hot water port and a cold water inlet;
The main heat exchanger is arranged above the burner, the main heat exchanger is provided with a first heat exchange water channel, heat generated by combustion of fuel gas through the burner is transferred to water in the first heat exchange water channel, smoke generated by combustion is collected through the smoke collecting hood and enters the smoke discharging channel under the action of the fan, the condensation heat exchanger is arranged in the smoke discharging channel, the condensation heat exchanger is provided with a second heat exchange water channel which can exchange heat with the smoke in the smoke discharging channel, the plate heat exchanger is provided with a heating water channel and a bathroom water channel, the water outlet of the first heat exchange water channel is communicated with the water inlet of the circulating water pump, the water inlet of the first heat exchange water channel is communicated with the water outlet of the second heat exchange water channel, the water inlet of the second heat exchange water channel is respectively communicated with the water inlets of the heating water return channel and the bypass pipe, the water outlet of the circulating water pump is respectively communicated with the water inlet of the heating water channel and the water inlet of the bypass pipe, the water outlet of the bypass pipe is communicated with the water inlet of the bathroom water channel and the water inlet of the bathroom water inlet is communicated with the water inlet of the bathroom;
The first temperature sensor is arranged at the water inlet of the first heat exchange water channel, is electrically connected with the main controller and is used for feeding back the temperature of water entering the first heat exchange water channel to the main controller; the electric control valve is arranged on the bypass pipe and is driven to open and close by the stepping motor, the stepping motor is electrically connected with the main controller, and the main controller controls the start and stop of the stepping motor according to signals fed back by the first temperature sensor.
As the preferable proposal of the condensing type gas heating and bathing dual-purpose furnace, the water outlet of the circulating water pump is respectively communicated with the heating water outlet and the water inlet of the heating water channel through an electronic three-way valve.
As the preferable scheme of the condensing type gas heating and bathing dual-purpose furnace, a flow sensor is arranged at the water inlet or the water outlet of the bathroom water channel.
As the preferable proposal of the condensing type gas heating and bathing dual-purpose furnace, the flow sensor is electrically connected with the main controller and is used for feeding back the flow of water entering the bathroom water channel to the main controller; the electronic three-way valve is electrically connected with the main controller, and the main controller controls the switching of the electronic three-way valve according to signals fed back by the flow sensor.
As the preferable scheme of the condensing type gas heating and bathing dual-purpose furnace, a second temperature sensor is arranged at the heating water outlet.
As the preferable proposal of the condensing type gas heating and bathing dual-purpose furnace, the second temperature sensor is electrically connected with the main controller and is used for feeding back the temperature of water entering the heating user end to the main controller; the burner is provided with a gas proportional valve, the gas proportional valve and the main controller are used for controlling the gas flow of the gas proportional valve according to signals fed back by the second temperature sensor.
As the preferable proposal of the condensing type gas heating and bathing dual-purpose furnace, a condensed water outlet which can discharge condensed water in the flue gas out of the machine is arranged in the flue gas discharging channel.
In addition, another aspect of the invention also provides a control method of the condensing gas heating and bathing dual-purpose furnace, wherein the heat generated by the combustion of the gas through the burner is transferred to the water in the main heat exchanger, and the smoke generated by the combustion is collected through the smoke collecting hood and enters the smoke discharging channel under the action of the fan; the heated hot water in the main heat exchanger provides heat for a user from a heating water outlet under the acting force of a circulating water pump, low-temperature circulating water after the user uses the heat flows back to the machine from a heating water return port, and secondary heat exchange is carried out between the low-temperature circulating water and smoke through a condensing heat exchanger, so that the smoke waste heat is recovered;
When the first temperature sensor detects that the circulating water passing through the condensation heat exchanger is lower than the set temperature range, the stepping motor drives the electric control valve to be slowly opened, the opening of the bypass pipe is increased, the high-temperature water heated by the burner is mixed with the circulating water passing through the condensation heat exchanger through the bypass pipe, the water temperature before entering the main heat exchanger is increased, and the stepping motor stops acting until the first temperature sensor detects that the water temperature reaches the set temperature range;
When the first temperature sensor detects that the circulating water passing through the condensation heat exchanger is higher than the set temperature range, the stepping motor drives the electric control valve to be slowly closed, the opening of the bypass pipe is reduced, the high-temperature water heated by the burner is mixed with the circulating water passing through the condensation heat exchanger through the bypass pipe, the water temperature before entering the main heat exchanger is reduced, and the stepping motor stops acting until the first temperature sensor detects that the water temperature reaches the set temperature range;
wherein the set temperature range is less than the dew point temperature of the water vapor in the flue gas.
As a preferable scheme of the control method, when the first temperature sensor detects that the temperature of the circulating water passing through the condensation heat exchanger is higher than the dew point temperature of the water vapor in the flue gas, the circulating water directly enters the main heat exchanger for heating; the bypass pipe is disconnected and water is not led.
Compared with the prior art, the condensing type gas heating and bathing dual-purpose furnace and the control method thereof have the following beneficial effects:
According to the invention, through the arrangement of the bypass pipe, the electric control valve and the first temperature sensor, the water temperature before entering the main heat exchanger is controlled, so that the water vapor in the flue gas can not be condensed on the main heat exchanger, the condensation of the water vapor in the flue gas on the condensation heat exchanger is not influenced, the corrosion of the main heat exchanger is effectively prevented, the service life of the whole machine is prolonged, and meanwhile, the reasonable heat efficiency is ensured.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of a condensing gas heating and bathing dual-purpose stove;
Wherein, 1 part of the burner, 2 parts of the fan, 3 parts of the fume collecting hood, 4 parts of the fume discharging channel, 5 parts of the main heat exchanger, 6 parts of the plate heat exchanger, 7 parts of the condensing heat exchanger, 8 parts of the gas proportioning valve, 9, a first temperature sensor, 10, an electric control valve, 11, a bypass pipe, 12, a circulating water pump, 13, an electronic three-way valve, 14, a flow sensor, 15 and a second temperature sensor;
A. Heating water outlet, R, heating water return port, C, bathroom hot water port, F, cold water inlet, S, condensed water outlet, G, gas inlet.
Detailed description of the preferred embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the preferred embodiment of the condensing type gas heating and bathing dual-purpose stove provided by the invention comprises a burner 1, a fan 2, a smoke collecting hood 3, a smoke discharging channel 4, a main controller, a main heat exchanger 5, a plate heat exchanger 6, a condensing heat exchanger 7, a first temperature sensor 9, an electric control valve 10, a bypass pipe 11, a circulating water pump 12, a heating water outlet A, a heating water return R, a bathroom hot water inlet C and a cold water inlet F.
The main heat exchanger 5 is arranged above the combustor 1, the main heat exchanger 5 is provided with a first heat exchange water channel, fuel gas is transmitted to water in the first heat exchange water channel through heat generated by combustion of the combustor 1, and smoke generated by combustion is collected through the smoke collecting hood 3 and enters the smoke discharging channel 4 under the action of the fan 2.
The condensation heat exchanger 7 is arranged in the smoke exhaust channel 4, and the condensation heat exchanger 7 is provided with a second heat exchange water channel which can exchange heat with smoke in the smoke exhaust channel 4. From this, the flue gas that the burning produced discharges the machine behind condensation heat exchanger 7, and in-process, the water in the second heat transfer water course can retrieve the flue gas waste heat, and the vapor in the flue gas condenses and produces the comdenstion water on condensation heat exchanger 7.
The plate heat exchanger 6 is provided with a heating water channel and a bathroom water channel so as to realize heat exchange between heating water and bathroom water.
In this embodiment, the water outlet of the first heat exchange water channel is communicated with the water inlet of the circulating water pump 12, the water inlet of the first heat exchange water channel is communicated with the water outlet of the second heat exchange water channel, the water inlet of the second heat exchange water channel is respectively communicated with the heating water return port R and the water outlet of the heating water channel, the water outlet of the circulating water pump 12 is respectively communicated with the heating water outlet a, the water inlet of the heating water channel and the water inlet of the bypass pipe 11, the water outlet of the bypass pipe 11 is communicated with the water inlet of the first heat exchange water channel, the water inlet of the bathroom water channel is communicated with the cold water inlet F, and the water outlet of the bathroom water channel is communicated with the bathroom water inlet C. The heating water (or referred to as circulating water) has two circulating water paths, wherein when the machine performs a heating function, the circulating water sequentially flows through the first heat exchange water path, the heating user end (such as a floor heating coil) and the second heat exchange water path to form a circulating water path; and secondly, when the machine has the bathroom function, circulating water sequentially flows through the first heat exchange water channel, the heating water channel and the second heat exchange water channel to form a circulating water channel. When the circulating water flows through the heating water channel, the heat of the circulating water is transferred to the cold water flowing through the bathroom water channel, and the water in the bathroom water channel is heated and then sent to a bathroom user end (such as a shower head, a tap and the like) through the bathroom hot water port C.
The first temperature sensor 9 is arranged at the water inlet of the first heat exchange water channel, the first temperature sensor 9 is electrically connected with the main controller and is used for feeding back the temperature of water entering the first heat exchange water channel to the main controller so as to realize water temperature detection before entering the main heat exchanger 5; the electric control valve 10 is arranged on the bypass pipe 11, the electric control valve 10 is driven by a stepping motor to open and close, water flow of the bypass pipe 11 is controlled, the stepping motor is electrically connected with the main controller, and the main controller controls the start and stop of the stepping motor according to signals fed back by the first temperature sensor 9. Therefore, the water temperature before entering the main heat exchanger 5 is controlled through the arrangement of the bypass pipe 11, the electric control valve 10 and the first temperature sensor 9, so that water vapor in the flue gas cannot be condensed on the main heat exchanger 5, the condensation of the water vapor in the flue gas on the condensation heat exchanger 7 is not influenced, the corrosion of the main heat exchanger 5 is effectively prevented, the service life of the whole machine is prolonged, and meanwhile, the reasonable heat efficiency is ensured.
The water outlet of the circulating water pump 12 is illustratively communicated with the heating water outlet a and the water inlet of the heating water channel through an electronic three-way valve 13, respectively. Thus, by setting the electronic three-way valve 13, switching between the heating function and the bathroom function is realized.
Illustratively, a flow sensor 14 is disposed at the water inlet or the water outlet of the bathroom water channel to realize water flow detection of the bathroom water channel. More preferably, the flow sensor 14 is electrically connected to the main controller and is used to feed back the flow of water into the bathroom water channel to the main controller; the electronic three-way valve 13 is electrically connected with the main controller, and the main controller controls the switching of the electronic three-way valve 13 according to the signal fed back by the flow sensor 14. Thus, when the flow sensor 14 detects that water flows through the bathroom water channel, the main controller can switch the circulating water channel of the circulating water by controlling the electronic three-way valve 13, so that the machine can be switched from the heating function to the bathroom function.
The second temperature sensor 15 is disposed at the heating water outlet a, so as to detect the water temperature before entering the heating user terminal. More preferably, the second temperature sensor 15 is electrically connected to the main controller, and is used for feeding back the temperature of the water entering the heating user side to the main controller; the burner 1 is provided with a gas proportional valve 8, the gas proportional valve 8 and the main controller control the gas flow of the gas proportional valve 8 according to the signal fed back by the second temperature sensor 15. Thus, when the second temperature sensor 15 detects that the water temperature before entering the heating user side is lower than the user set temperature, the main controller can increase the gas flow by controlling the gas proportional valve 8, and the water temperature before entering the heating user side is increased until the water temperature reaches the user set temperature; when the second temperature sensor 15 detects that the water temperature before entering the heating user side is higher than the user set temperature, the main controller can reduce the gas flow by controlling the gas proportional valve 8, and reduce the water temperature before entering the heating user side until the water temperature reaches the user set temperature.
Illustratively, a condensed water outlet S is provided in the smoke exhaust channel 4, which can discharge condensed water in the smoke out of the machine.
It should be noted that, the water inlet and the water outlet may be connected to each other through a pipe and a connector according to the distance between the connectors, or directly connected to each other through a connector.
In addition, the invention also provides a control method of the condensing gas heating and bathing dual-purpose furnace, which comprises the following specific processes:
The heat generated by the combustion of the fuel gas through the burner 1 is transferred to the water in the main heat exchanger 5, and the flue gas generated by the combustion is collected through the fume collecting hood 3 and enters the fume exhaust channel 4 under the action of the fan 2; the heated hot water in the main heat exchanger 5 provides heat for a user from the heating water outlet A under the acting force of the circulating water pump 12, the low-temperature circulating water after the user uses the heat flows back to the machine from the heating water return port R, and secondary heat exchange is carried out between the low-temperature circulating water and the flue gas through the condensing heat exchanger 7, and the flue gas waste heat is recovered;
when the first temperature sensor 9 detects that the circulating water passing through the condensation heat exchanger 7 is lower than the set temperature range, the stepping motor drives the electric control valve 10 to be slowly opened, the opening of the bypass pipe 11 is increased, the high-temperature water heated by the burner 1 is mixed with the circulating water passing through the condensation heat exchanger 7 through the bypass pipe 11, the water temperature before entering the main heat exchanger 5 is increased, and the stepping motor stops acting until the first temperature sensor 9 detects that the water temperature reaches the set temperature range;
When the first temperature sensor 9 detects that the circulating water passing through the condensation heat exchanger 7 is higher than the set temperature range, the stepping motor drives the electric control valve 10 to be slowly closed, the opening of the bypass pipe 11 is reduced, the high-temperature water heated by the burner 1 is mixed with the circulating water passing through the condensation heat exchanger 7 through the bypass pipe 11, the water temperature before entering the main heat exchanger 5 is reduced, and the stepping motor stops acting until the first temperature sensor 9 detects that the water temperature reaches the set temperature range;
So reciprocating cycle, guarantee to keep at suitable temperature range all the time before getting into main heat exchanger 5, guarantee that vapor in the flue gas can not condense at main heat exchanger 5, guarantee reasonable thermal efficiency simultaneously.
Wherein the set temperature range is less than the dew point temperature of the water vapor in the flue gas. The dew point temperature of the steam in the flue gas varies according to the heat load of the machine, and the set temperature range varies accordingly. For example, when the heat load of the machine is maximum (i.e. the gas proportional valve 8 is tuned to the maximum), the dew point temperature of the water vapor in the flue gas is 60 degrees, and the set temperature range is 53 degrees to 57 degrees; when the heat load of the machine is minimum (i.e. the gas proportional valve 8 is adjusted to the minimum), the dew point temperature of the water vapor in the flue gas is 50 degrees, and the set temperature range is 43 to 47 degrees.
More preferably, when the first temperature sensor 9 detects that the temperature of the circulating water passing through the condensation heat exchanger 7 is higher than the dew point temperature of water vapor in the flue gas, the circulating water directly enters the main heat exchanger 5 for heating; the bypass pipe 11 is disconnected from the water.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (9)
1. The condensing type gas heating and bathing dual-purpose furnace is characterized by comprising a burner, a fan, a fume collecting hood, a fume exhaust channel, a main controller, a main heat exchanger, a plate heat exchanger, a condensing heat exchanger, a first temperature sensor, an electric control valve, a bypass pipe, a circulating water pump, a heating water outlet, a heating water return port, a bathroom hot water port and a cold water inlet;
The main heat exchanger is arranged above the burner, the main heat exchanger is provided with a first heat exchange water channel, heat generated by combustion of fuel gas through the burner is transferred to water in the first heat exchange water channel, smoke generated by combustion is collected through the smoke collecting hood and enters the smoke discharging channel under the action of the fan, the condensation heat exchanger is arranged in the smoke discharging channel, the condensation heat exchanger is provided with a second heat exchange water channel which can exchange heat with the smoke in the smoke discharging channel, the plate heat exchanger is provided with a heating water channel and a bathroom water channel, the water outlet of the first heat exchange water channel is communicated with the water inlet of the circulating water pump, the water inlet of the first heat exchange water channel is communicated with the water outlet of the second heat exchange water channel, the water inlet of the second heat exchange water channel is respectively communicated with the water inlets of the heating water return channel and the bypass pipe, the water outlet of the circulating water pump is respectively communicated with the water inlet of the heating water channel and the water inlet of the bypass pipe, the water outlet of the bypass pipe is communicated with the water inlet of the bathroom water channel and the water inlet of the bathroom water inlet is communicated with the water inlet of the bathroom;
The first temperature sensor is arranged at the water inlet of the first heat exchange water channel, is electrically connected with the main controller and is used for feeding back the temperature of water entering the first heat exchange water channel to the main controller; the electric control valve is arranged on the bypass pipe, the electric control valve is driven to open and close by a stepping motor, the stepping motor is electrically connected with the main controller, and the main controller controls the starting and stopping of the stepping motor according to signals fed back by the first temperature sensor;
When the first temperature sensor detects that the circulating water passing through the condensation heat exchanger is lower than the set temperature range, the stepping motor drives the electric control valve to be slowly opened, the opening of the bypass pipe is increased, the high-temperature water heated by the burner is mixed with the circulating water passing through the condensation heat exchanger through the bypass pipe, the water temperature before entering the main heat exchanger is increased, and the stepping motor stops acting until the first temperature sensor detects that the water temperature reaches the set temperature range;
When the first temperature sensor detects that the circulating water passing through the condensation heat exchanger is higher than the set temperature range, the stepping motor drives the electric control valve to be slowly closed, the opening of the bypass pipe is reduced, the high-temperature water heated by the burner is mixed with the circulating water passing through the condensation heat exchanger through the bypass pipe, the water temperature before entering the main heat exchanger is reduced, and the stepping motor stops acting until the first temperature sensor detects that the water temperature reaches the set temperature range;
wherein the set temperature range is less than the dew point temperature of the water vapor in the flue gas.
2. The condensing gas heating and bathing dual-purpose furnace of claim 1, wherein the water outlet of the circulating water pump is respectively communicated with the heating water outlet and the water inlet of the heating water channel through an electronic three-way valve.
3. The condensing gas heating and bathing dual-purpose furnace as claimed in claim 2, wherein a flow sensor is arranged at the water inlet or the water outlet of the bathroom water channel.
4. The condensing gas heating and bathing dual-purpose stove as claimed in claim 3, wherein said flow sensor is electrically connected to said main controller and is used for feeding back the flow of water entering said bathroom water channel to said main controller; the electronic three-way valve is electrically connected with the main controller, and the main controller controls the switching of the electronic three-way valve according to signals fed back by the flow sensor.
5. The condensing gas heating and bathing dual-purpose furnace as claimed in claim 1, wherein a second temperature sensor is arranged at the heating water outlet.
6. The condensing gas heating and bathing dual-purpose stove as claimed in claim 5, wherein said second temperature sensor is electrically connected with said main controller and is used for feeding back the temperature of water entering the heating user side to said main controller; the burner is provided with a gas proportional valve, the gas proportional valve and the main controller are used for controlling the gas flow of the gas proportional valve according to signals fed back by the second temperature sensor.
7. A condensing gas heating and bathing dual-purpose furnace as claimed in any one of claims 1 to 6 wherein a condensate outlet is provided in said smoke evacuation channel for draining condensate from the smoke out of the machine.
8. A control method of a condensing type gas heating and bathing dual-purpose furnace as claimed in any one of claims 1 to 7, wherein heat generated by combustion of gas through a burner is transferred to water in a main heat exchanger, and flue gas generated by combustion is collected through a fume collecting hood and enters a fume exhaust passage under the action of a fan; the heated hot water in the main heat exchanger provides heat for a user from a heating water outlet under the acting force of a circulating water pump, low-temperature circulating water after the user uses the heat flows back to the machine from a heating water return port, and secondary heat exchange is carried out between the low-temperature circulating water and smoke through a condensing heat exchanger, so that the smoke waste heat is recovered;
When the first temperature sensor detects that the circulating water passing through the condensation heat exchanger is lower than the set temperature range, the stepping motor drives the electric control valve to be slowly opened, the opening of the bypass pipe is increased, the high-temperature water heated by the burner is mixed with the circulating water passing through the condensation heat exchanger through the bypass pipe, the water temperature before entering the main heat exchanger is increased, and the stepping motor stops acting until the first temperature sensor detects that the water temperature reaches the set temperature range;
When the first temperature sensor detects that the circulating water passing through the condensation heat exchanger is higher than the set temperature range, the stepping motor drives the electric control valve to be slowly closed, the opening of the bypass pipe is reduced, the high-temperature water heated by the burner is mixed with the circulating water passing through the condensation heat exchanger through the bypass pipe, the water temperature before entering the main heat exchanger is reduced, and the stepping motor stops acting until the first temperature sensor detects that the water temperature reaches the set temperature range;
wherein the set temperature range is less than the dew point temperature of the water vapor in the flue gas.
9. The control method of a condensing gas heating and bathing dual-purpose furnace according to claim 8, wherein when the first temperature sensor detects that the temperature of the circulating water passing through the condensing heat exchanger is higher than the dew point temperature of the water vapor in the flue gas, the circulating water directly enters the main heat exchanger for heating; the bypass pipe is disconnected and water is not led.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810806043.7A CN109059290B (en) | 2018-07-20 | 2018-07-20 | Condensing type gas heating and bathing dual-purpose furnace and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810806043.7A CN109059290B (en) | 2018-07-20 | 2018-07-20 | Condensing type gas heating and bathing dual-purpose furnace and control method thereof |
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| CN109059290A CN109059290A (en) | 2018-12-21 |
| CN109059290B true CN109059290B (en) | 2024-05-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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