CN114877522B - Wall-mounted furnace and control method - Google Patents
Wall-mounted furnace and control method Download PDFInfo
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- CN114877522B CN114877522B CN202210005242.4A CN202210005242A CN114877522B CN 114877522 B CN114877522 B CN 114877522B CN 202210005242 A CN202210005242 A CN 202210005242A CN 114877522 B CN114877522 B CN 114877522B
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/48—Water heaters for central heating incorporating heaters for domestic water
- F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
- F24H1/526—Pipes in pipe heat exchangers for sanitary water
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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
- F24H9/20—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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a wall-mounted furnace and a control method, which are characterized by comprising a shell, a fan, a heating water outlet probe, a gas proportional valve, a stepping motor three-way valve, a controller, a bath water outlet probe, a bath water inlet probe, a heating variable-frequency water pump, a water flow sensor, a bath direct-current water pump, a sectional electromagnetic valve, a burner, a main heat exchanger and a plate heat exchanger, wherein the input end of the main heat exchanger is connected with a heating water return pipeline, the output end of the main heat exchanger is connected with a heating water outlet pipeline, the plate heat exchanger is connected with a cold water inlet pipeline and a bath water outlet pipeline, and the plate heat exchanger is connected between the heating water return pipeline and the heating water outlet pipeline through a valve body; the three-way valve of the stepping motor is connected with the heating water outlet pipeline and the plate heat exchanger, and is provided with a passage for leading out a heating water outlet pipe fitting, and the heating variable-frequency water pump is connected with a heating backwater pipe fitting. The invention can ensure the hot water performance and improve the heating comfort.
Description
Technical Field
The invention relates to the technical field of wall-mounted furnaces, in particular to a wall-mounted furnace and a control method.
Background
The heating and bathing functions of the existing wall-mounted boiler products must be separated and independently operated. The wall hanging stove is of prior bathing function, when bathing demands exist in a heating mode, the sleeve type wall hanging stove immediately stops the operation of a heating water pump, and the original electric three-way valve of the plate-change type wall hanging stove only supports switching between a large system circulation and a small plate-change circulation, so that two circulation channels can not simultaneously hold water, and heating water can only be switched from the large system circulation to the small plate-change circulation, thereby ensuring the constant temperature performance of bathing hot water. Under the heating state, during the bath water, the heat exchange of the bath water is guaranteed through the small plate exchange circulation of the heating water, the heating system is in large circulation and has no water flow, the stationary system heating water cannot be heated through the boiler, and the heat dissipation capacity of the stationary system heating water cannot maintain the indoor temperature stable, so that the heating comfort is reduced.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides the wall-mounted boiler which is simple in structure, ensures the constant temperature performance of hot water and improves the heating comfort.
Another object of the present invention is to provide a method for controlling a wall-mounted boiler.
The invention adopts the following technical proposal to realize the aim: a wall-mounted boiler is characterized by comprising a shell, a fan, a heating water outlet probe, a fuel gas proportional valve, a stepping motor three-way valve, a controller, a bath water outlet probe, a bath water inlet probe, a heating variable-frequency water pump, a water flow sensor, a bath direct-current water pump, a sectional electromagnetic valve, a burner, a main heat exchanger and a plate heat exchanger, wherein the input end of the main heat exchanger is connected with a heating water return pipeline, the output end of the main heat exchanger is connected with a heating water outlet pipeline, the plate heat exchanger is connected with a cold water inlet pipeline and a bath water outlet pipeline, the plate heat exchanger is connected between the heating water return pipeline and the heating water outlet pipeline through a valve body of the plate heat exchanger, the stroke position of the stepping motor three-way valve directly influences heating circulation flow, and the higher the proportion characteristic of flow and stroke is more consistent, the more favorable for the controller to output matching combustion load.
The three-way valve of the stepping motor is connected with a heating water outlet pipeline, the three-way valve of the stepping motor is provided with a passage for leading out a heating water outlet pipe fitting, and the heating variable-frequency water pump is connected with a heating backwater pipe fitting.
The bath direct-current water pump, the water flow sensor and the bath water inlet probe are respectively arranged on the cold water inlet pipeline, and the bath water outlet probe is arranged on the bath water outlet pipeline.
As a further explanation of the above scheme, the heating backwater probe is arranged on the heating backwater pipeline and is used for detecting the heating backwater temperature.
Further, the combustor corresponds with the main heat exchanger, the combustor is connected with a gas pipeline, the gas proportional valve is arranged on the gas pipeline, the controller is connected with the control gas proportional valve, and the sectional electromagnetic valve is arranged on the combustor and used for supporting multi-sectional combustion.
Further, the heating variable frequency water pump is connected to the heating backwater pipe fitting, the input signal of the heating variable frequency water pump is a square wave signal within the frequency range specified by the manufacturer, the duty ratio of the input signal is within the specified range, the heating variable frequency water pump synchronously outputs a square wave feedback signal with fixed frequency, and the duty ratio is proportional to the flow.
A control method of a wall-mounted furnace is characterized by comprising the following steps of.
A1, in a heating state, the controller detects the bathing water demand by the signal of the water flow sensor, and calculates the burning load demand P1 of the bathing by combining the temperature signals of the bathing water outlet probe and the bathing water inlet probe and the bathing target temperature set by a user.
A2, if the bath load demand P1 is greater than or equal to the maximum combustion load Pmax set by the wall-mounted furnace, the controller controls the output of the maximum combustion load.
A3, if the bath load demand P1 is smaller than the maximum combustion load Pmax set by the wall-mounted furnace.
A3.1, when the bath target temperature Tw is more than or equal to the heating target temperature Tc, according to the heat conduction principle, the combustion load must be controlled to ensure that the heating actual outlet water temperature Tout is more than Tw, namely Tout is more than Tc, so that the bath hot water with the actual outlet water temperature Tw can be obtained; when the controller contains an indoor temperature probe or is connected with an indoor temperature controller, whether the heating circulation needs to be kept continuously during the bath period can be judged by room temperature signals, otherwise, the three-way valve of the stepping motor is controlled to act, the opening at the large circulation side of the system is gradually enlarged, meanwhile, the rotating speed of the heating variable-frequency water pump is controlled, the total flow of the heating circulation and the combustion load are matched on the basis of not affecting the constant temperature performance of the bath hot water, and the Tout is maintained to be less than c+K ℃.
A3.2, when the bath target temperature Tw is less than the heating target temperature Tc, the heating combustion load demand P2 can be calculated by the temperature signals of the heating water outlet probe and the heating water return probe, the flow rate signals of the heating variable-frequency water pump and the heating target temperature set by a user.
And A4, after the bath water is used, controlling the combustion load to be the minimum load of the boiler, and judging and executing the subsequent instructions according to the current signal conditions.
Further, in step a3.2, if p1+p2 is greater than or equal to Pmax, the controller outputs a maximum load Pmax, controls the three-way valve of the stepper motor to open the system for large circulation, adjusts the number of motor operation steps and controls the variable-frequency heating pump 9 to match the total heating circulation flow, so as to maintain the constant temperature performance of the bath hot water, and simultaneously makes the actual outlet heating temperature Tout approach the target heating temperature Tc as much as possible.
Further, in step a3.2, if p1+p2 is less than Pmax, the controller outputs a load (p1+p2), controls the number of steps of the three-way valve of the stepper motor, increases the speed of the variable-frequency heating water pump, and matches the total flow of the heating cycle, so that the constant temperature performance of the bath hot water and the actual water outlet temperature of the heating meet the user requirements.
The beneficial effects achieved by adopting the technical proposal of the invention are that.
According to the invention, the stepping motor three-way valve is adopted to replace an electric three-way valve, and the opening sizes of the channels of the large circulation and the small circulation of the plate change of the system are regulated, so that heating water can circulate in the large channel and the small channel at the same time, and the heating and bathing functions can be operated at the same time; the alternating current constant-speed water pump is replaced by the heating variable-frequency water pump, so that the total circulating water flow is adjustable and matched with the combustion load, and after the three-way valve of the stepping motor is controlled to act to heat and bath, the bath water temperature and the heating water temperature expected by a user can still be obtained, thereby improving the heating comfort while guaranteeing the constant-temperature performance of hot water.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of motor travel-system flow.
Fig. 3 is a schematic diagram of flow feedback characteristics of a variable frequency heating water pump.
Reference numerals illustrate: 1. fan 2, temperature controller 3, heating water outlet probe 4, gas proportional valve 5, step motor three-way valve 6, controller 7, bathing water outlet probe 8, bathing water inlet probe 9, heating variable frequency water pump 10, water flow sensor 11, bathing direct current water pump 12, plate heat exchanger 13, heating return water probe 14, combustor 15, main heat exchanger 16, heating return water pipe 17, heating water outlet pipe 18, cold water inlet pipe 19, bathing water outlet pipe 20, expansion tank 21, heating water outlet pipe 22, heating return water pipe.
Detailed Description
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.
The following description of the specific embodiments of the present invention is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.
As shown in fig. 1-3, the wall-mounted boiler comprises a fan 1, a temperature controller 2, a heating water outlet probe 3, a fuel gas proportional valve 4, a stepping motor three-way valve 5, a controller 6, a bath water outlet probe 7, a bath water inlet probe 8, a heating variable-frequency water pump 9, a water flow sensor 10, a bath direct-current water pump 11, a plate heat exchanger 12, a heating water return probe 13, a burner 14 and a main heat exchanger 15, wherein the input end of the main heat exchanger is connected with a heating water return pipeline 16, the output end of the main heat exchanger is connected with a heating water outlet pipeline 17, the heating water return pipeline 16 is externally connected with an expansion tank 20, the plate heat exchanger is connected with a cold water inlet pipeline 18 and a bath water outlet pipeline 19, the plate heat exchanger is connected between the heating water return pipeline and the heating water outlet pipeline through a valve body, the stroke position of the stepping motor three-way valve directly influences heating circulation flow, and the higher the consistency of the flow and the stronger the stroke proportion characteristic is, the more favorable for the controller to output matching combustion load; the three-way valve of the stepping motor is connected with a heating water outlet pipeline and the plate heat exchanger, the three-way valve of the stepping motor is provided with a passage leading out a heating water outlet pipe fitting 21, and the heating variable-frequency water pump is connected with a heating water return pipe fitting 22; the bath direct-current water pump, the water flow sensor and the bath water inlet probe are respectively arranged on the cold water inlet pipeline, and the bath water outlet probe is arranged on the bath water outlet pipeline. The heating backwater probe is arranged on the heating backwater pipeline and is used for detecting the temperature of heating backwater. The combustor corresponds with the main heat exchanger, and the combustor is connected with the gas pipeline, and the gas proportional valve sets up on the gas pipeline, and the controller connection control gas proportional valve, segmentation solenoid valve setting are on the combustor for support many segmentation burning.
Further, the heating variable frequency water pump is connected to the heating backwater pipe fitting, the input signal of the heating variable frequency water pump is a square wave signal within the frequency range specified by the manufacturer, the duty ratio of the input signal is within the specified range, the heating variable frequency water pump synchronously outputs a square wave feedback signal with fixed frequency, and the duty ratio is proportional to the flow.
The control steps of the wall-mounted furnace are as follows.
1. In the heating state, the controller 6 detects the bathing water demand by the signal of the water flow sensor 10, and calculates the burning load demand P1 of the bathing in combination with the temperature signals of the bathing water outlet probe 7 and the bathing water inlet probe 8 and the bathing target temperature set by the user.
2. If the bath load demand P1 is equal to or greater than the maximum combustion load Pmax set by the wall-hanging stove, the controller 6 controls the output of the maximum combustion load.
3. If the bath load demand P1 is smaller than the maximum combustion load Pmax set by the wall-mounted boiler.
3.1, when the bath target temperature Tw is more than or equal to the heating target temperature Tc, according to the heat conduction principle, the combustion load must be controlled to enable the heating actual outlet water temperature Tout to be more than Tw, namely Tout > Tc, so that the bath hot water with the actual outlet water temperature Tw can be obtained. Therefore, considering the comfort of house heating and avoiding overlarge fluctuation of indoor temperature, when the controller 6 comprises an indoor temperature probe or is connected with an indoor temperature controller, whether the heating cycle needs to be continuously maintained during bath or not can be judged by room temperature signals; when Tout is more than or equal to Tc+K DEG C (the size of K is adjustable), heating is not started, otherwise, the three-way valve 5 of the stepping motor is controlled to act, the opening at the large circulation side of the system is gradually enlarged, meanwhile, the rotating speed of the heating variable-frequency water pump 9 is controlled, the total flow of the heating circulation and the combustion load are matched on the basis of not affecting the constant-temperature performance of the bathing hot water, and Tout is maintained to be less than Tc+K deg.C.
3.2, when the bath target temperature Tw is less than the heating target temperature Tc, the heating combustion load demand P2 can be calculated from the temperature signals of the heating water outlet probe 3 and the heating water return probe 13, the flow rate signal of the heating variable frequency water pump 9 and the heating target temperature set by the user.
3.2.1, if P1+P2 is more than or equal to Pmax, the controller 6 outputs the maximum load Pmax, controls the three-way valve 5 of the stepping motor to open the system large circulation, adjusts the action steps of the motor and controls the heating variable frequency water pump 9 to match the heating circulation total flow, so as to maintain the constant temperature performance of the bath hot water, and simultaneously, the actual outlet water temperature Tout of heating is as close to the heating target temperature Tc as possible.
3.2.2, if P1+P2 is less than Pmax, the controller 6 outputs the load (P1+P2), controls the action steps of the three-way valve 5 of the stepping motor, improves the rotating speed of the heating variable-frequency water pump 9, and matches the total flow of heating circulation, so that the constant temperature performance of the bath hot water and the actual water outlet temperature of heating meet the user requirements.
4. After the bath water is used, the combustion load is controlled to be the minimum load of the boiler, and the subsequent instructions are judged and executed according to the current signal conditions.
Compared with the prior art, the invention can run simultaneously for heating and bathing, and improves the heating comfort while guaranteeing the hot water performance; stepless speed regulation is carried out on a heating variable-frequency water pump, large-flow rapid heating is carried out, and small-flow energy conservation and noise reduction are carried out.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the present invention.
Claims (3)
1. The control method of the wall-mounted furnace is characterized by comprising the following steps of:
a1, in a heating state, a controller detects the bathing water demand by a signal of a water flow sensor, and calculates the burning load demand P1 of the bathing by combining temperature signals of a bathing water outlet probe and a bathing water inlet probe and a bathing target temperature set by a user;
a2, if the bath load demand P1 is greater than or equal to the maximum combustion load Pmax set by the wall-mounted furnace, the controller controls the output of the maximum combustion load;
a3, if the bath load demand P1 is smaller than the maximum combustion load Pmax set by the wall-mounted furnace;
a3.1, when the bath target temperature Tw is more than or equal to the heating target temperature Tc, according to the heat conduction principle, the combustion load must be controlled to ensure that the heating actual outlet water temperature Tout is more than Tw, namely Tout is more than Tc, so that the bath hot water with the actual outlet water temperature Tw can be obtained; when the controller contains an indoor temperature probe or is connected with an indoor temperature controller, whether the heating cycle needs to be kept continuously during the bath or not can be judged by room temperature signals; when Tout is more than or equal to Tc+K ℃, K is adjustable, heating is not started, otherwise, the three-way valve of the stepping motor is controlled to act, the opening at the large circulation side of the system is gradually increased, meanwhile, the rotating speed of the heating variable-frequency water pump is controlled, the total flow of the heating circulation and the combustion load are matched on the basis of not affecting the constant-temperature performance of the bathing hot water, and Tout is maintained to be less than Tc+K ℃;
a3.2, when the bath target temperature Tw is less than the heating target temperature Tc, calculating a heating combustion load demand P2 by using temperature signals of a heating water outlet probe and a heating water return probe, flow signals of a heating variable-frequency water pump and a heating target temperature set by a user;
a4, after the bath water is used, controlling the combustion load to be the minimum load of the boiler, and judging and executing the subsequent instruction according to the current signal conditions; in the step A3.2, if P1+P2 is more than or equal to Pmax, the controller outputs the maximum load Pmax, controls the three-way valve of the stepping motor to open the system for large circulation, adjusts the action steps of the motor and controls the heating variable-frequency water pump to match the total heating circulation flow so as to maintain the constant temperature performance of the bath hot water, and simultaneously enables the actual heating outlet water temperature Tout to be close to the heating target temperature Tc; in the step A3.2, if P1+P2 is less than Pmax, the controller outputs a load P1+P2;
the corresponding wall-mounted boiler comprises a shell, a fan, a heating water outlet probe, a gas proportional valve, a stepping motor three-way valve, a controller, a bath water outlet probe, a bath water inlet probe, a heating variable-frequency water pump, a water flow sensor, a bath direct-current water pump, a sectional electromagnetic valve, a burner, a main heat exchanger and a plate heat exchanger, wherein the input end of the main heat exchanger is connected with a heating water return pipeline, the output end of the main heat exchanger is connected with a heating water outlet pipeline, the plate heat exchanger is connected with a cold water inlet pipeline and a bath water outlet pipeline, and the plate heat exchanger is connected between the heating water return pipeline and the heating water outlet pipeline through a valve body;
the stepping motor three-way valve is connected with a heating water outlet pipeline and the plate heat exchanger, and is provided with a passage for leading out a heating water outlet pipe fitting, and the heating variable-frequency water pump is connected with a heating water return pipe fitting;
the bath direct-current water pump, the water flow sensor and the bath water inlet probe are respectively arranged on the cold water inlet pipeline, and the bath water outlet probe is arranged on the bath water outlet pipeline.
2. The control method of a wall-mounted boiler according to claim 1, wherein the burner corresponds to the main heat exchanger, the burner is connected with a gas pipeline, the gas proportional valve is arranged on the gas pipeline, the controller is connected with the control gas proportional valve, and the sectional electromagnetic valve is arranged on the burner and used for supporting multi-sectional combustion.
3. The control method of a wall-mounted boiler according to claim 1, wherein the heating variable-frequency water pump is connected to the heating return water pipe, the input signal of the heating variable-frequency water pump is a square wave signal, the heating variable-frequency water pump synchronously outputs a square wave feedback signal with a fixed frequency, and the duty ratio of the square wave feedback signal is proportional to the flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210005242.4A CN114877522B (en) | 2022-01-05 | 2022-01-05 | Wall-mounted furnace and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210005242.4A CN114877522B (en) | 2022-01-05 | 2022-01-05 | Wall-mounted furnace and control method |
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| CN114877522A CN114877522A (en) | 2022-08-09 |
| CN114877522B true CN114877522B (en) | 2023-06-23 |
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| CN202210005242.4A Active CN114877522B (en) | 2022-01-05 | 2022-01-05 | Wall-mounted furnace and control method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005257157A (en) * | 2004-03-11 | 2005-09-22 | Matsushita Electric Ind Co Ltd | Hot water supply device |
| CN205980320U (en) * | 2016-07-19 | 2017-02-22 | 银川艾尼工业科技开发股份有限公司 | Hanging is secondary condensing heat exchanger for stove |
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2022
- 2022-01-05 CN CN202210005242.4A patent/CN114877522B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005257157A (en) * | 2004-03-11 | 2005-09-22 | Matsushita Electric Ind Co Ltd | Hot water supply device |
| CN205980320U (en) * | 2016-07-19 | 2017-02-22 | 银川艾尼工业科技开发股份有限公司 | Hanging is secondary condensing heat exchanger for stove |
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| CN114877522A (en) | 2022-08-09 |
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