CN105605785B - temperature setting method for constant-temperature gas water heater - Google Patents
temperature setting method for constant-temperature gas water heater Download PDFInfo
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- CN105605785B CN105605785B CN201610000428.5A CN201610000428A CN105605785B CN 105605785 B CN105605785 B CN 105605785B CN 201610000428 A CN201610000428 A CN 201610000428A CN 105605785 B CN105605785 B CN 105605785B
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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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
the invention discloses a temperature setting method of a constant-temperature gas water heater, wherein the constant-temperature gas water heater comprises two hot water outlets and a cold water inlet, and the temperature setting value of the constant-temperature gas water heater is controlled by controlling the ratio of the outlet hot water flow of a first hot water outlet and the inlet cold water flow of the cold water inlet by a water valve; when the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is increased, the temperature set value is increased; when the ratio between the outlet hot water flow of the first hot water outlet and the inlet cold water flow of the cold water inlet is decreased, the temperature set value is decreased. The method does not need a wired or wireless remote controller, can realize the remote control of the hot water temperature set value of the water heater, and has stable and reliable control result.
Description
Technical Field
the invention relates to a constant-temperature gas water heater control technology, in particular to a temperature setting method of a constant-temperature gas water heater.
Background
The constant temperature gas water heater can keep the temperature of the outlet water constant, but if the temperature is not properly set, particularly when a user takes a shower, the temperature of the gas water heater without a wireless remote control or a remote wire control cannot be adjusted, and the gas water heater is easy to extinguish by adding cold water through the water mixing valve. The temperature of the gas water heater is adjusted by adopting wireless remote control, and signals of a remote controller cannot be transmitted to the gas water heater on many occasions due to the limitation of the installation position. When a remote wire control mode is adopted, the special waterproof wired remote controller is high in cost, wires need to be buried in advance, the electronic wired remote controller works in a wet environment such as a bathroom for a long time, and the failure rate of the electronic wired remote controller is high.
Disclosure of Invention
The invention aims to provide a solution for remotely controlling the hot water temperature of a constant-temperature gas water heater, namely a method for remotely controlling the temperature set value of the constant-temperature gas water heater.
In order to achieve the aim, the invention provides a temperature setting method of a constant-temperature gas water heater, which comprises the following steps:
the constant-temperature gas water heater comprises a controller, a positive-acting flow sensor, a total flow sensor, a first hot water outlet, a second hot water outlet, a cold water inlet and a heat exchanger. The constant-temperature gas water heater is connected between a cold water inlet and the heat exchanger through a cold water pipe; one end of the first hot water pipe is connected to the first hot water outlet, and the other end of the first hot water pipe is communicated to the water outlet end of the main hot water pipe; one end of the second hot water pipe is connected to the second hot water outlet, and the other end of the second hot water pipe is communicated to the water outlet end of the main hot water pipe; the water inlet end of the main hot water pipe is connected to the heat exchanger.
The positive-acting flow sensor is arranged in front of the first hot water outlet and is used for detecting the outlet hot water flow of the first hot water outlet; the total flow sensor is installed behind the cold water inlet to detect an inlet cold water flow of the cold water inlet.
The positive-acting flow sensor is electrically connected with the controller and is used for transmitting an outlet hot water flow signal of the first hot water outlet to the controller; and the total flow sensor is electrically connected with the controller and is used for transmitting an inlet cold water flow signal of the cold water inlet to the controller.
the temperature setting method comprises the steps that the temperature setting value of the constant-temperature gas water heater is controlled by the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet; when the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is increased, the temperature set value is increased; when the ratio between the outlet hot water flow of the first hot water outlet and the inlet cold water flow of the cold water inlet is decreased, the temperature set value is decreased.
the temperature set point is according to formula
Calculation is performed, where T is a temperature set value, Q1 is an outlet hot water flow rate of the first hot water outlet, Q0 is an inlet cold water flow rate of the cold water inlet, T1 is a lowest temperature set value, and K is a temperature adjustment range coefficient.
The step of the controller calculating the temperature set point is:
Step S1, initialization;
step S2, sampling the outlet hot water flow of the first hot water outlet and the inlet cold water flow of the cold water inlet;
Step S3, calculating the temperature set value of the constant temperature gas water heater;
Step S4, other processing and waiting; when the next sampling timing arrives, the process proceeds to step S2.
The ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is adjusted and changed by the water mixing valve; 2 water inlets of the water mixing valve are respectively connected to a first hot water outlet and a second hot water outlet of the constant-temperature gas water heater through water pipes.
The ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is adjusted and changed by a first adjusting valve and a second adjusting valve; the water inlet of the first regulating valve is connected to a first hot water outlet of the constant-temperature gas water heater through a water pipe, and the water inlet of the second regulating valve is connected to a second hot water outlet of the constant-temperature gas water heater through a water pipe; the water outlets of the first regulating valve and the second regulating valve are communicated to form a water outlet end.
The constant-temperature gas water heater further comprises a heat exchanger, a water pipe, a power supply module, a hot water temperature detection module, a gas flow control driving module, a fan control driving module and an ignition control and flame detection module.
The invention has the advantages that a wired or wireless remote controller is not needed, the method of controlling the flow of two paths of hot water by the water valve is adopted, the remote control of the set value of the hot water temperature of the water heater is realized, and the control result is stable and reliable.
Drawings
Fig. 1 is a block diagram of a system in an embodiment 1 of a method for setting a temperature of a constant temperature gas water heater.
Fig. 2 is a block diagram of the structure of the system embodiment 2 of the method for setting the temperature of the constant temperature gas water heater.
fig. 3 is a schematic block diagram of a flow sensing circuit.
FIG. 4 is a flow chart for calculating a temperature set point.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
a structural block diagram of a system embodiment 1 of the method for setting the temperature of a constant-temperature gas water heater is shown in fig. 1, and the system embodiment 1 is composed of a heat exchanger 101, a total flow sensor 201, a positive flow sensor 202, a first hot water outlet 203, a second hot water outlet 204, a cold water inlet 205, a mixing valve 301, a cold water pipe 401, a main hot water pipe 402, a first hot water pipe 403, a second hot water pipe 404, a first connecting water pipe 405, a second connecting water pipe 406, a mixed hot water pipe 407, and a water outlet nozzle 302.
The constant-temperature gas water heater is provided with 1 cold water inlet and 2 hot water outlets, and a cold water pipe 401 is connected between the cold water inlet 205 and the heat exchanger 101; one end of the first hot water pipe 403 is connected to the first hot water outlet 203, and the other end is connected to the water outlet end of the main hot water pipe 402; one end of the second hot water pipe 404 is connected to the second hot water outlet 204, and the other end is connected to the water outlet end of the main hot water pipe 402; the water inlet end of the main hot water pipe 402 is connected to the heat exchanger 101.
The positive flow sensor 202 is arranged in front of the first hot water outlet 203 and is used for detecting the outlet hot water flow of the first hot water outlet; the total flow sensor 201 is installed behind the cold water inlet 205 to detect an inlet cold water flow of the cold water inlet 205. Specifically, positive flow sensor 202 is mounted on a first hot water pipe 403 and total flow sensor 201 is mounted on a cold water pipe 401. Since the outlet hot water flow rate of the heat exchanger 101 corresponds to the inlet cold water flow rate, the total flow sensor 201 can also be installed on the main hot water pipe 402.
2 water inlets of the water mixing valve 301 are respectively connected to a first hot water outlet 203 and a second hot water outlet 204 of the constant-temperature gas water heater through a first connecting water pipe 405 and a second connecting water pipe 406; the water outlet of the mixing valve 301 is connected to the water outlet nozzle 302 by a mixing hot water pipe 407. When the mixing valve 301 is a cold water and hot water mixing valve, the first connecting water pipe 405 is connected to a hot water inlet of the mixing valve 301, and the second connecting water pipe 406 is connected to a cold water inlet of the mixing valve 301.
A block diagram of a system embodiment 2 of the method for setting the temperature of the constant-temperature gas water heater is shown in fig. 2, and the difference from the embodiment 1 is that a first adjusting valve 303 and a second adjusting valve 304 are used instead of a water mixing valve 301; the water inlet of the first adjusting valve 303 is connected to the first hot water outlet 203 of the constant temperature gas water heater through a first connecting water pipe 405, and the water inlet of the second adjusting valve 304 is connected to the second hot water outlet 204 of the constant temperature gas water heater through a second connecting water pipe 406. The water outlets of the first regulating valve 303 and the second regulating valve 304 are communicated to form a water outlet end which is connected with a mixed hot water pipe 407.
The constant temperature gas water heater further comprises a controller 210, a flow detection circuit of which is shown in a schematic block diagram in fig. 3, a total flow sensor 201 is provided with a total flow signal output end OUT for detecting the cold water flow at the inlet of a cold water inlet 205, the total flow signal is an electric signal, and the signal type is pulse frequency, or voltage, or current. The positive-acting flow sensor 202 is provided with a first flow signal output end OUT1 for detecting the hot water flow at the outlet of the first hot water outlet 203, wherein the first flow signal is an electric signal, and the type of the signal is pulse frequency, voltage or current.
The controller 210 has a total flow signal input IN, a first flow signal input IN 1; the total flow signal input terminal IN and the first flow signal input terminal IN1 are connected to the total flow signal output terminal OUT and the first flow signal output terminal OUT1, respectively.
The principle of the temperature setting of the constant-temperature gas water heater is as follows:
Adjusting the water mixing valve 301, or adjusting the first adjusting valve 303 and the second adjusting valve 304 to change the outlet hot water flow of the first hot water outlet 203 and the second hot water outlet 204, and controlling the temperature set value of the constant-temperature gas water heater by the ratio of the outlet hot water flow of the first hot water outlet 203 to the inlet cold water flow of the cold water inlet 205; the inlet cold water flow of the cold water inlet 205 is equal to the sum of the outlet hot water flows of the first hot water outlet 203 and the second hot water outlet 204.
If the outlet hot water flow of the first hot water outlet 203 is Q1, the inlet cold water flow of the cold water inlet 205 is Q0, and the temperature setting value of the constant-temperature gas water heater is T, the temperature setting value T is increased when the ratio of Q1 to Q0 is increased; when the ratio of Q1 to Q0 decreases, the temperature set point T decreases. The controller 210 obtains the outlet hot water flow Q1 of the first hot water outlet 203 and the inlet cold water flow Q0 of the cold water inlet 205 by the positive flow sensor 202 and the total flow sensor 201, and then uses the formula
and calculating the temperature set value T of the constant-temperature gas water heater, wherein T1 is the lowest temperature set value, and K is the temperature regulating range coefficient. The flow rates Q1, Q0 are in L/min.
The water temperature control interval of a water heater is usually between 30 ℃ and 80 ℃. T1-30 ℃ and K-40 were chosen, the temperature setpoint T being controlled between 30 ℃ and 70 ℃.
The controller 210 is composed of a microcontroller and peripheral circuits. The microcontroller is preferably a single chip microcomputer or other devices such as ARM, DSP and the like are selected. When the signal types of the first flow rate signal and the total flow rate signal are pulse frequencies, the first flow rate signal input terminal IN1 and the total flow rate signal input terminal IN are counting input terminals of a counter inside the microcontroller. When the signal type of the first flow rate signal and the total flow rate signal is voltage or current, the first flow rate signal input terminal IN1 and the total flow rate signal input terminal IN are analog signal input terminals of the a/D converter. The a/D converter is controlled by and reads data from the microcontroller, preferably included within the microcontroller.
the constant-temperature gas water heater further comprises a hot water temperature detection module, a gas flow control driving module, a fan control driving module, an ignition control and flame detection module and the like. Further, the constant temperature gas water heater also selectively comprises a part of or all of the modules in the cold water temperature detection module, the temperature value display module, the wind pressure detection module and the buzzer module.
the constant temperature gas water heater also includes a power module for powering the controller 210, the total flow sensor 201, the positive flow sensor 202, and other modules.
the flow of the controller 210 calculating the temperature set point is shown in fig. 4, and includes the following steps:
Step S1, initialization;
Step S2, sampling an outlet hot water flow Q1 of the first hot water outlet 203 and an inlet cold water flow Q0 of the cold water inlet 205;
Step S3, calculating the temperature set value T of the constant temperature gas water heater;
step S4, other processing and waiting; when the next sampling timing arrives, the process proceeds to step S2.
the controller 210 calculates the temperature setting value T of the constant temperature gas water heater, and performs other control of the constant temperature gas water heater. The other processing and waiting include water temperature sampling, water temperature control, gas flow control driving, fan control driving, ignition control, and the like, which need to be completed by the controller 210, and waiting. After the controller 210 calculates the temperature setting value T, it adopts a proper control algorithm to control the heating power of the gas water heater by controlling the gas flow, so as to control the temperature of the hot water of the gas water heater within the allowable error range near the temperature setting value T, thereby implementing the constant temperature function.
The control of the next sampling time is realized by software delay or timer timing by the controller 210.
The positive-acting flow sensor 202 and the total flow sensor 201 are preferably water flow sensors of the same type and the same range. Further, the positive-acting flow sensor 202 and the total flow sensor 201 are preferably low-cost hall water flow sensors with pulse frequency output signals.
The above description is only an example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A temperature setting method for a constant-temperature gas water heater is characterized by comprising the following steps:
The constant-temperature gas water heater comprises a controller, a positive-acting flow sensor, a total flow sensor, a first hot water outlet, a second hot water outlet, a cold water inlet and a heat exchanger;
The constant-temperature gas water heater is connected between a cold water inlet and the heat exchanger through a cold water pipe; one end of the first hot water pipe is connected to the first hot water outlet, and the other end of the first hot water pipe is communicated to the water outlet end of the main hot water pipe; one end of the second hot water pipe is connected to the second hot water outlet, and the other end of the second hot water pipe is communicated to the water outlet end of the main hot water pipe; the water inlet end of the main hot water pipe is connected to the heat exchanger;
The positive-acting flow sensor is arranged in front of the first hot water outlet and is used for detecting the outlet hot water flow of the first hot water outlet; the total flow sensor is arranged behind the cold water inlet and used for detecting the inlet cold water flow of the cold water inlet;
The positive-acting flow sensor is electrically connected with the controller and is used for transmitting an outlet hot water flow signal of the first hot water outlet to the controller; the total flow sensor is electrically connected with the controller and is used for transmitting an inlet cold water flow signal of the cold water inlet to the controller;
The temperature setting method comprises the steps that the temperature setting value of the constant-temperature gas water heater is controlled by the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet; when the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is increased, the temperature set value is increased; when the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is reduced, the temperature set value is reduced;
The ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is adjusted and changed by a water mixing valve, and 2 water inlets of the water mixing valve are respectively connected to the first hot water outlet and the second hot water outlet of the constant-temperature gas water heater through water pipes; the ratio of the outlet hot water flow of the first hot water outlet to the inlet cold water flow of the cold water inlet is adjusted and changed by a first adjusting valve and a second adjusting valve, the water inlet of the first adjusting valve is connected to the first hot water outlet of the constant-temperature gas water heater through a water pipe, the water inlet of the second adjusting valve is connected to the second hot water outlet of the constant-temperature gas water heater through a water pipe, and the water outlets of the first adjusting valve and the second adjusting valve are communicated to form a water outlet end.
2. The temperature setting method of a constant temperature gas water heater according to claim 1, characterized in that: the temperature set point is according to formula
calculation is performed, where T is a temperature set value, Q1 is an outlet hot water flow rate of the first hot water outlet, Q0 is an inlet cold water flow rate of the cold water inlet, T1 is a lowest temperature set value, and K is a temperature adjustment range coefficient.
3. The temperature setting method of a constant temperature gas water heater according to claim 2, characterized in that: the minimum temperature set value T1 is 30 ℃, and the temperature regulation range coefficient K is 40.
4. The temperature setting method of a constant temperature gas water heater according to claim 1, characterized in that: the positive-acting flow sensor and the total flow sensor are water flow sensors of the same type and the same measuring range.
5. The temperature setting method of a constant temperature gas water heater according to claim 1, characterized in that: the positive-acting flow sensor and the total flow sensor are Hall water flow sensors.
6. The temperature setting method of a constant temperature gas water heater according to claim 1, characterized in that: the step of the controller calculating the temperature set point is:
step S1, initialization;
Step S2, sampling the outlet hot water flow of the first hot water outlet and the inlet cold water flow of the cold water inlet;
Step S3, calculating the temperature set value of the constant temperature gas water heater;
Step S4, other processing and waiting; when the next sampling timing arrives, the process proceeds to step S2.
7. the temperature setting method of a constant temperature gas water heater according to claim 6, characterized in that: the other processing and waiting are other control and waiting of the constant temperature gas water heater which are required to be carried out by the controller besides the calculation of the temperature set value of the constant temperature gas water heater.
8. The temperature setting method of a constant temperature gas water heater according to claim 1, characterized in that: the constant-temperature gas water heater further comprises a heat exchanger, a water pipe, a power supply module, a hot water temperature detection module, a gas flow control driving module, a fan control driving module and an ignition control and flame detection module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610000428.5A CN105605785B (en) | 2016-01-04 | 2016-01-04 | temperature setting method for constant-temperature gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610000428.5A CN105605785B (en) | 2016-01-04 | 2016-01-04 | temperature setting method for constant-temperature gas water heater |
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| CN105605785B true CN105605785B (en) | 2019-12-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008070906A1 (en) * | 2006-12-12 | 2008-06-19 | Rheem Australia Pty Limited | A controllable water heater |
| CN201688004U (en) * | 2010-05-18 | 2010-12-29 | 无锡和晶科技股份有限公司 | Proportional valve control and feedback circuit of gas water heater |
| CN103344046A (en) * | 2013-06-28 | 2013-10-09 | 海尔集团公司 | Constant-temperature gas heater control method and constant-temperature gas heater |
| CN104236109A (en) * | 2013-06-24 | 2014-12-24 | 海尔集团公司 | Control method and control device of constant-temperature gas water heater |
-
2016
- 2016-01-04 CN CN201610000428.5A patent/CN105605785B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008070906A1 (en) * | 2006-12-12 | 2008-06-19 | Rheem Australia Pty Limited | A controllable water heater |
| CN201688004U (en) * | 2010-05-18 | 2010-12-29 | 无锡和晶科技股份有限公司 | Proportional valve control and feedback circuit of gas water heater |
| CN104236109A (en) * | 2013-06-24 | 2014-12-24 | 海尔集团公司 | Control method and control device of constant-temperature gas water heater |
| CN103344046A (en) * | 2013-06-28 | 2013-10-09 | 海尔集团公司 | Constant-temperature gas heater control method and constant-temperature gas heater |
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Effective date of registration: 20201015 Address after: 237000 Democratic constituency of Shiji street, Anfeng Town, Shouxian County, Huainan City, Anhui Province Patentee after: Wang Jingjing Address before: 412007 School of industry, research and production, Hunan University of Technology, 88 West Taishan Road, Zhuzhou, Hunan Patentee before: HUNAN University OF TECHNOLOGY Effective date of registration: 20201015 Address after: No.76 Minfeng South Road, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: ZHANGJIAGANG DONGDA INDUSTRIAL TECHNOLOGY Research Institute Address before: 237000 Democratic constituency of Shiji street, Anfeng Town, Shouxian County, Huainan City, Anhui Province Patentee before: Wang Jingjing |