CN112484316A - Zero-cold-water wall-mounted boiler with hot water pressurization function and control method - Google Patents
Zero-cold-water wall-mounted boiler with hot water pressurization function and control method Download PDFInfo
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- CN112484316A CN112484316A CN202011452752.3A CN202011452752A CN112484316A CN 112484316 A CN112484316 A CN 112484316A CN 202011452752 A CN202011452752 A CN 202011452752A CN 112484316 A CN112484316 A CN 112484316A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 271
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 30
- 239000008236 heating water Substances 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 235000006506 Brasenia schreberi Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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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
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Abstract
The invention discloses a zero-cold-water wall-mounted furnace with a hot water pressurization function and a control method thereof, and the zero-cold-water wall-mounted furnace is characterized by comprising a main controller, an operator, a bathroom direct-current speed-regulating water pump, a water flow sensor, a bathroom water inlet temperature probe, a plate heat exchanger, a bathroom water outlet temperature probe and a burner heat exchange device, wherein the burner heat exchange device comprises a burner, a heat exchanger, a heating water inlet pipe and a heating water outlet pipe which are connected with the heat exchanger, a first connecting pipeline is connected between the heating water outlet pipe and the plate heat exchanger, and a second connecting pipeline is connected between the heating water inlet pipe; the plate heat exchanger is provided with a bathroom water inlet pipeline and a bathroom water outlet pipeline, and the bathroom water inlet temperature probe, the water flow sensor and the bathroom direct-current water pump are arranged on the bathroom water inlet pipeline; the bathroom outlet water temperature probe is arranged on a bathroom outlet water pipeline. The invention has simple structure, improves the adaptability of the product to different circulating pipelines, avoids generating overlarge running noise and reduces the production cost of zero-cold water products.
Description
Technical Field
The invention relates to the technical field of wall-mounted furnaces.
Background
The bathroom circulating water pump of the existing zero-cold-water wall-mounted boiler product generally uses a constant-speed water pump, rarely uses a direct-current water pump with adjustable speed, only uses the direct-current water pump as power for hot water circulation preheating, and does not fully exert the speed-adjusting advantage of the bathroom direct-current water pump.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide the zero-cold-water wall-mounted boiler with the hot water pressurization function, which can optimize the constant temperature performance of hot water, save the material cost and reduce the assembly difficulty.
The invention also aims to provide a control method of the zero-cold-water wall-mounted boiler with the hot water supercharging function.
The invention adopts the following technical scheme to realize the purpose: a zero-cold-water wall-mounted furnace with a hot water pressurization function is characterized by comprising a main controller, an operator connected with the main controller, a bathroom direct-current speed-regulating water pump, a water flow sensor, a bathroom water inlet temperature probe, a plate heat exchanger, a bathroom water outlet temperature probe and a combustor heat exchange device, wherein the combustor heat exchange device comprises a combustor, a heat exchanger, a heating water inlet pipe and a heating water outlet pipe connected with the heat exchanger, a first connecting pipeline is connected between the heating water outlet pipe and the plate heat exchanger, and a second connecting pipeline is connected between the heating water inlet pipe and the plate heat exchanger;
the plate heat exchanger is provided with a bathroom water inlet pipeline and a bathroom water outlet pipeline, and the bathroom water inlet temperature probe, the water flow sensor and the bathroom direct-current water pump are arranged on the bathroom water inlet pipeline;
the bathroom outlet water temperature probe is arranged on a bathroom outlet water pipeline.
As a further explanation of the above scheme, a pressure detection device is arranged on the heating water outlet pipe, and the pressure detection device is connected with the main controller.
Furthermore, the heating water inlet pipe is provided with a heating water pump, and the heating water pump is connected with the main controller.
A control method of a zero-cold-water wall-mounted boiler with a hot water pressurization function is characterized in that a bathroom direct-current speed-regulating water pump is adopted, so that the flow of circulating preheating water is adjustable, the temperatures of a bathroom water inlet temperature probe and a bathroom water outlet temperature probe are monitored in real time through a main controller, and when the water temperature meets the requirement of starting circulating preheating, the voltage of the bathroom direct-current speed-regulating water pump is output; the bathroom direct current speed governing water pump starts the operation, and rivers sensor detects rivers signal and feeds back to main control unit in the hanging stove, starts burning circulation heating, after many times circulation heating, obtains the constant temperature hot water that satisfies bathroom water target temperature requirement.
Furthermore, the main controller is connected with an operator, the operator is provided with a pressure boost function button, a user can select whether to open the water pump according to the water pressure condition of a user, after the user opens the valve to use water, the bathroom direct-current water pump is started, the PWM value is adjusted to increase the rotating speed of the water pump, when the PWM value is detected to be continuously increased (or decreased) by P% (P is more than or equal to 10 and less than or equal to 30 for the direct-current water pump with the PWM value being positively correlated with the rotating speed), the change value of the water flow is less than k (more than or equal to 0.5 and less than or equal to 1.5), the physical flow limiting value of the boiler is proved to be reached, the current rotating; and the main controller judges the property of the current water flow signal belongs to water consumption of a user or circular preheating according to the time point of the water flow signal and the water flow.
Further, when the preheating starting condition is not met, the detected water flow signal is used for judging that water is used by a user at present, and if the supercharging function is started, the relation between the current water flow f and the current water flow b is judged: in order to widen the water flow range of the pressurization function, introducing a circulating flow value (rounded) when the PWM duty ratio of the bathroom direct-current water pump is P% under the environment that c is 50-80 m of a household circulating preheating pipeline; if f is less than or equal to b-c, controlling the PWM duty ratio of the bathroom direct-current water pump to be P%, detecting the current water flow to be f1, if f1 is less than b, adjusting the rotating speed of the water pump to enable f1 to be b, if b-c is less than f1 and less than or equal to b +1, keeping the starting rotating speed, and if f1 is more than b +1, closing the bathroom direct-current water pump; if the pressurization function is closed, the bathroom direct-current water pump is not started under the condition that the user uses water;
the water flow signal detected after the preheating starting condition is met and the bathroom direct-current water pump is started is judged as circulating preheating; when the water flow is detected to be suddenly changed and is larger than the upper limit value b during circulating preheating, the water is judged to be used by a user, if the current supercharging function is started, the bathroom direct-current water pump is controlled to adjust, the water outlet constant temperature is controlled, if the current supercharging function is closed, the bathroom direct-current water pump is controlled to stop running, and after the water is used by the user, the preheating starting condition is judged.
Further, the preheating starting conditions are as follows: in the appointed time period, when the current temperature Tin of the bathroom inlet water temperature probe is less than or equal to the target temperature TS-starting temperature difference T0-2 ℃ or the current temperature Tout of the bathroom outlet water temperature probe is less than or equal to the target temperature TS-starting temperature difference T0 (the target temperature TS and the starting temperature difference T0 can be set by a user), the starting hot water preheating is controlled; the preheating flame-out conditions are as follows: and continuously detecting that the bath water inlet temperature is more than or equal to the bath water outlet target temperature or the bath water outlet temperature is more than or equal to the bath water outlet target temperature plus 10 ℃ within 10 s.
Further, under the normal preheating condition, the bathroom water in the hot water pipeline is heated to meet the flameout condition, the burning time does not exceed 30min, and therefore when the preheating flameout condition is not met even when the circulating preheating exceeds 30min, it is judged that the user is opening the valve to use the water, and the bathroom circulating water pump stops running immediately.
The invention adopts the technical proposal to achieve the following beneficial effects:
according to the invention, through controlling the rotating speed of the direct-current water pump and the flow of hot water output by the whole machine, the water flow and the combustion load are accurately matched, the water temperature comfort of circulating preheating and water use for opening the valve of a user is ensured, the adaptability of the product to different circulating pipelines and the water pressure of water inlet of the user is improved, the hot water is output quickly, constantly and uniformly, the user experience is improved, and the production cost of a zero-cold water product is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a control flow chart of the present invention.
Description of reference numerals: 1. the water heater comprises a main controller 2, an operator 3, a bathroom direct-current speed-regulating water pump 4, a water flow sensor 5, a bathroom water inlet temperature probe 6, a plate heat exchanger 7, a bathroom water outlet temperature probe 8, a burner heat exchange device 9, a first connecting pipeline 10, a second connecting pipeline 11, a bathroom water inlet pipeline 12, a bathroom water outlet pipeline 13, a pressure detection device 14 and a heating water pump.
Detailed Description
The technical solution is described in detail with reference to specific embodiments below.
As shown in fig. 1, the invention is a zero-cold water wall-mounted boiler with hot water pressurization function, which comprises a main controller 1, an operator 2 connected with the main controller, a bathroom direct-current speed-regulating water pump 3, a water flow sensor 4, a bathroom water inlet temperature probe 5, a plate heat exchanger 6, a bathroom water outlet temperature probe 7 and a burner heat exchange device 8, wherein the burner heat exchange device comprises a burner, a heat exchanger, a heating water inlet pipe and a heating water outlet pipe connected with the heat exchanger, a first connecting pipeline 9 is connected between the heating water outlet pipe and the plate heat exchanger, and a second connecting pipeline 10 is connected between the heating water inlet pipe and the plate heat exchanger; the plate heat exchanger is provided with a bathroom water inlet pipeline 11 and a bathroom water outlet pipeline 12, and the bathroom water inlet temperature probe, the water flow sensor and the bathroom direct-current water pump are arranged on the bathroom water inlet pipeline; the bathroom outlet water temperature probe is arranged on a bathroom outlet water pipeline. And a pressure detection device 13 is arranged on the heating water outlet pipe and is connected with the main controller. The heating inlet tube is provided with heating water pump 14, and the heating water pump is connected with main control unit. Through adopting bathroom direct current speed governing water pump, make circulation preheating water flow adjustable, saved the water storage tank in the general scheme, reduce the minimum load of bathroom burning below 2kW simultaneously, reduced minimum temperature rise, further optimized hot water constant temperature performance, and save material cost again, reduce the assembly degree of difficulty, kill many birds with one stone.
Furthermore, the invention quickly obtains comfortable hot water by controlling the starting and stopping of the direct-current speed-regulating water pump of the bathroom and the running rotating speed thereof, and the control steps are as follows:
1. the main controller 1 monitors the temperatures of the bathroom water inlet temperature probe 5 and the bathroom water outlet temperature probe 7 in real time, and outputs the voltage of the bathroom direct-current water pump 3 when the water temperature meets the requirement of starting circulation preheating;
2. the bathroom direct-current water pump 3 is started to operate, the water flow sensor 4 in the wall-mounted boiler detects a water flow signal and feeds the water flow signal back to the main controller 1, and combustion cyclic heating is started;
3. after multiple times of circulating heating, constant-temperature hot water meeting the target temperature requirement of the bathroom water is obtained.
As shown in fig. 2, specifically, the implementation steps are as follows:
1. the operator 2 is provided with a pressure increasing function key, and a user can select whether to start or not according to the water pressure condition of the user.
2. According to the requirement of GB 25034, when the hot water production rate of the appliance at the temperature rise of 30K is a, the water flow rate b of the temperature rise of 40K is 3 a/4; in order to ensure that the output hot water after pressurization can meet the constant temperature requirement of a user, the upper limit value of the hot water flow of the temperature rise 40K is set to be b (rounded) on the operator 1. Most users require the temperature of the bathroom water to be 40-45 ℃, and the water inlet temperature of different bathrooms directly influences the flow of the outputted constant-temperature hot water under the same temperature rise requirement. Therefore, the upper flow limit b is only effective in the winter mode with low bathroom inlet water temperature. Starting a pressurization function in a summer mode, starting the bathroom direct-current water pump 3 after a user opens a valve to use water, adjusting a PWM value to increase the rotating speed of the water pump, and when the PWM value is detected to be continuously increased (or decreased) by P% (P is more than or equal to 10 and less than or equal to 30 for the direct-current water pump with the PWM value in positive correlation with the rotating speed), proving that the physical flow limiting value of the boiler is reached and keeping the current rotating speed unchanged, wherein the change value of the water flow is less than k (k is more than or equal to 0.5 and less than or equal to. And after the user finishes using water, closing the bathroom direct-current water pump 3.
3. The main controller 1 judges the property of the current water flow signal to belong to water consumption of a user or circular preheating according to the time point of the water flow signal and the water flow.
3.1, when not satisfying preheating the start condition, the rivers signal that detects judges that present is user's water, if "pressure boost" function is opened, then judges the relation of present discharge f and b: in order to widen the water flow range of the pressurization function, introducing a circulating flow value (rounded) when the PWM duty ratio of the bathroom direct-current water pump is P% under the environment that c is 50-80 m of a household circulating preheating pipeline; if f is less than or equal to b-c, controlling the PWM duty ratio of the bathroom direct-current water pump 3 to be P%, detecting the current water flow to be f1, if f1 is less than b, adjusting the water pump rotating speed to enable f1 to be b, if b-c is less than f1 and less than or equal to b +1, keeping the starting rotating speed, and if f1 is more than b +1, closing the bathroom direct-current water pump 3; if the 'supercharging' function is closed, the bathroom direct current water pump 3 is not started under the condition that the user uses water.
3.2, judging that the water flow signal detected after the preheating starting condition is met and the bathroom direct-current water pump is started is circulating preheating; when the water flow is detected to be suddenly changed and is larger than the upper limit value b during circulating preheating, the water consumption of a user is judged, if the current 'pressurization' function is started, the bathroom direct-current water pump 3 is controlled to be adjusted according to the step 3.1, the effluent is controlled to be constant in temperature, if the current 'pressurization' function is closed, the bathroom direct-current water pump 3 is controlled to stop running, and after the water of the user is used, the preheating starting condition is judged.
4. The preheating starting conditions are as follows: and in the appointed time period, when the current temperature Tin of the bathroom inlet water temperature probe is less than or equal to the target temperature TS-starting temperature difference T0-2 ℃ or the current temperature Tout of the bathroom outlet water temperature probe is less than or equal to the target temperature TS-starting temperature difference T0 (the target temperature TS and the starting temperature difference T0 can be set by a user), controlling to start hot water preheating.
5. The preheating flame-out conditions are as follows: and continuously detecting that the bath water inlet temperature is more than or equal to the bath water outlet target temperature or the bath water outlet temperature is more than or equal to the bath water outlet target temperature plus 10 ℃ within 10 s. Under the normal preheating condition, the bathroom water in the hot water pipeline is heated to meet the flameout condition, and the burning time does not exceed 30 min. Therefore, when the preheating flameout condition is not met even when the circulating preheating exceeds 30min, the bathroom circulating water pump 3 is immediately stopped when the water is opened by the user.
Compared with the prior art, the invention precisely matches water flow and combustion load by controlling the rotation speed of the direct water pump and the hot water output flow of the whole machine, ensures the water temperature comfort of circulating preheating and water use for opening the valve of a user, improves the adaptability of the product to different circulating pipelines and the water inlet pressure of the user, outputs fast, constant and uniform hot water, improves the user experience, and simultaneously reduces the production cost of zero-cold water products.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. A zero-cold-water wall-mounted furnace with a hot water pressurization function is characterized by comprising a main controller, an operator connected with the main controller, a bathroom direct-current speed-regulating water pump, a water flow sensor, a bathroom water inlet temperature probe, a plate heat exchanger, a bathroom water outlet temperature probe and a combustor heat exchange device, wherein the combustor heat exchange device comprises a combustor, a heat exchanger, a heating water inlet pipe and a heating water outlet pipe connected with the heat exchanger, a first connecting pipeline is connected between the heating water outlet pipe and the plate heat exchanger, and a second connecting pipeline is connected between the heating water inlet pipe and the plate heat exchanger;
the plate heat exchanger is provided with a bathroom water inlet pipeline and a bathroom water outlet pipeline, and the bathroom water inlet temperature probe, the water flow sensor and the bathroom direct-current water pump are arranged on the bathroom water inlet pipeline;
the bathroom outlet water temperature probe is arranged on a bathroom outlet water pipeline.
2. The zero-cold-water wall-mounted boiler with the hot water pressurization function according to claim 1, wherein a pressure detection device is arranged on the heating water outlet pipe, and the pressure detection device is connected with a main controller.
3. The zero-cold-water wall-mounted boiler with the hot water pressurization function according to claim 1, wherein a heating water pump is arranged on the heating water inlet pipe, and the heating water pump is connected with a main controller.
4. A control method corresponding to the zero-cold-water wall-mounted boiler with the hot water pressurization function of any one of claims 1 to 3 is characterized in that a bathroom direct-current speed-regulating water pump is adopted, the flow of circulating preheating water is adjustable, the temperatures of a bathroom water inlet temperature probe and a bathroom water outlet temperature probe are monitored in real time through a main controller, and when the water temperature meets the requirement of starting circulating preheating, the voltage of the bathroom direct-current speed-regulating water pump is output; the bathroom direct current speed governing water pump starts the operation, and rivers sensor detects rivers signal and feeds back to main control unit in the hanging stove, starts burning circulation heating, after many times circulation heating, obtains the constant temperature hot water that satisfies bathroom water target temperature requirement.
5. The method for controlling the zero-cold-water wall-mounted boiler with the hot water pressurization function according to claim 4, wherein the main controller is connected with an operator, the operator is provided with a pressurization function button, a user can select whether to start the zero-cold-water wall-mounted boiler according to the water pressure condition of a user, the bathroom direct-current water pump is started after the user opens a valve to use water, the PWM value is adjusted to increase the rotating speed of the water pump, when the PWM value is detected to be continuously increased or decreased by P%, P is more than or equal to 10 and less than or equal to 30, the change value of the water flow is less than k, k is more than or equal to 0.5 and less than or equal to 1.5, the physical flow limiting value of the boiler is proved; and the main controller judges the property of the current water flow signal belongs to water consumption of a user or circular preheating according to the time point of the water flow signal and the water flow.
6. The method according to claim 5, wherein when the preheating start condition is not satisfied, the detected water flow signal is used for judging that the water is currently used by the user, and if the supercharging function is started, the relation between the current water flow f and the current water flow b is judged: in order to widen the water flow range of the pressurization function, introducing a circulating flow value when the PWM duty ratio of the bathroom direct-current water pump is P% in a domestic circulating preheating pipeline environment with the c being 50-80 m; if f is less than or equal to b-c, controlling the PWM duty ratio of the bathroom direct-current water pump to be P%, detecting the current water flow to be f1, if f1 is less than b, adjusting the rotating speed of the water pump to enable f1 to be b, if b-c is less than f1 and less than or equal to b +1, keeping the starting rotating speed, and if f1 is more than b +1, closing the bathroom direct-current water pump; if the pressurization function is closed, the bathroom direct-current water pump is not started under the condition that the user uses water;
the water flow signal detected after the preheating starting condition is met and the bathroom direct-current water pump is started is judged as circulating preheating; when the water flow is detected to be suddenly changed and is larger than the upper limit value b during circulating preheating, the water is judged to be used by a user, if the current supercharging function is started, the bathroom direct-current water pump is controlled to adjust, the water outlet constant temperature is controlled, if the current supercharging function is closed, the bathroom direct-current water pump is controlled to stop running, and after the water is used by the user, the preheating starting condition is judged.
7. The method for controlling a zero-cold-water wall-hanging stove with a hot water pressurization function according to claim 6, wherein the preheating start condition is as follows: in the appointed time period, when the current temperature Tin of the bathroom inlet water temperature probe is less than or equal to the target temperature TS-starting temperature difference T0-2 ℃ or the current temperature Tout of the bathroom outlet water temperature probe is less than or equal to the target temperature TS-starting temperature difference T0, starting hot water preheating is controlled; the preheating flame-out conditions are as follows: and continuously detecting that the bath water inlet temperature is more than or equal to the bath water outlet target temperature or the bath water outlet temperature is more than or equal to the bath water outlet target temperature plus 10 ℃ within 10 s.
8. The method as claimed in claim 7, wherein the method includes heating the bath water in the hot water pipe to satisfy a flameout condition under a normal preheating condition, wherein a burning time is not more than 30min, and when the preheating time exceeds 30min and the preheating flameout condition is not satisfied, the method determines that the user is opening the valve and the bath circulating water pump stops operating immediately.
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| CN202011452752.3A CN112484316A (en) | 2020-12-11 | 2020-12-11 | Zero-cold-water wall-mounted boiler with hot water pressurization function and control method |
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| CN202011452752.3A CN112484316A (en) | 2020-12-11 | 2020-12-11 | Zero-cold-water wall-mounted boiler with hot water pressurization function and control method |
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| CN115900078A (en) * | 2022-10-20 | 2023-04-04 | 珠海格力电器股份有限公司 | Constant-temperature water outlet device, wall-mounted furnace and constant-temperature water outlet method |
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