CN107781978B - Intelligent gas water heater with variable-lift function - Google Patents
Intelligent gas water heater with variable-lift function Download PDFInfo
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- CN107781978B CN107781978B CN201610740800.6A CN201610740800A CN107781978B CN 107781978 B CN107781978 B CN 107781978B CN 201610740800 A CN201610740800 A CN 201610740800A CN 107781978 B CN107781978 B CN 107781978B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 336
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 185
- 239000002737 fuel gas Substances 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium 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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- 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)
- Feeding And Controlling Fuel (AREA)
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Abstract
The invention discloses an intelligent gas water heater with a variable-rise function, which comprises a gas water heater body, a gas proportional valve, a main controller and an operation display, wherein the gas proportional valve is arranged on a gas supply channel of the gas water heater body, the main controller is arranged on the gas water heater body, the gas proportional valve and the operation display are electrically connected with the main controller, the main controller changes the opening of the gas flow by adjusting the working current of the gas proportional valve so as to control the heat load of the water heater, a temperature setting key is arranged on the operation display, and the main controller automatically sets the maximum opening of the gas proportional valve at different rising gears according to the preset temperature preset by the temperature setting key. According to the invention, the main controller changes the gas flow opening degree by adjusting the working current of the gas proportional valve so as to control the heat load of the water heater, and automatically sets the maximum opening degree of the gas proportional valve at different upshift gears according to the preset temperature, so that the upshift suitable for users can be automatically set according to the preset temperature, and the water use requirements of the users in different occasions are met.
Description
Technical Field
The invention relates to a gas water heater, in particular to an intelligent gas water heater with a variable-lift function.
Background
The standard machine liter number of the gas water heater is the rated water heating capacity, and is defined as the amount of water flowing out per minute when the temperature rise of the water heater is converted to delta t=25K under the rated heat load state. For example, the model JSQ24-Q12JW of the water heater has the model liter number of 12 liters, the rated heat generating capacity of 12kg/min (delta t=25K) and the rated heat load of 24kW. At present, the number of the gas water heater in the market is fixed, and when consumers purchase the gas water heater to select the number of the machine, the number of the machine is often difficult to control. The machine rises for several hours, and the water outlet temperature in winter is possibly not hot enough; the waste of water and fuel gas is easily caused by the large number of the selected machine liters. Therefore, the gas water heater with fixed and unchanged lifting number has great limitation in use.
The Chinese patent application No. 201511033400.3 discloses a variable-lift gas water heater, which comprises: the gas water heater comprises a gas water heater body, a gas proportional valve, a main controller and an operation display, wherein the gas proportional valve and the main controller are both arranged on the gas water heater body, the gas proportional valve is in signal connection with the main controller, and the operation display is also in signal connection with the main controller; the operation display is provided with a variable-rise key for adjusting the maximum opening of the fuel gas proportional valve to different gears. Although the gas water heater has the function of changing the rise, the user needs to manually operate to change the rise setting, the use convenience is poor, the intelligent degree is not high, the user does not know under what condition to change the rise operation, the purposes of saving water and gas are not achieved, and the purposes of automatically adjusting the water temperature and the rise gear are not achieved.
Disclosure of Invention
In view of this, the present invention aims to overcome the shortcomings of the prior art, and provides an intelligent gas water heater with a variable-rise function, which can automatically change the rise of the water heater according to the preset temperature, the temperature interval between the preset temperature and the ambient temperature, and the difference between the preset temperature and the water inlet temperature, and can work under the maximum load corresponding to the rise.
The invention solves the problems by the following technical means:
the utility model provides an intelligent gas heater with become function of rising, includes gas heater body, gas proportional valve, main control unit and operation display, the gas proportional valve sets up on the air feed channel of gas heater body, main control unit sets up on the gas heater body, the gas proportional valve with the operation display all with the main control unit electricity is connected, main control unit changes gas flow aperture through adjusting gas proportional valve's operating current in order to control the water heater thermal load, be provided with the temperature setting key on the operation display, main control unit is according to the preset temperature that the temperature setting key preset is automatic will the maximum aperture of gas proportional valve is set up in different and is put up the several gears.
Preferably, the gas water heater further comprises an ambient temperature sensor for detecting ambient temperature, the ambient temperature sensor is arranged on the shell of the gas water heater body, the ambient temperature sensor is electrically connected with the main controller, and the main controller automatically sets the maximum gas flow opening of the gas proportional valve at different upshifts according to a temperature interval where the preset temperature and the ambient temperature detected by the ambient temperature sensor are located.
Preferably, the gas water heater further comprises a water inlet temperature sensor for detecting water inlet temperature, the water inlet temperature sensor is arranged at the cold water inlet end of the gas water heater body, the water inlet temperature sensor is electrically connected with the main controller, and the main controller automatically sets the maximum gas flow opening of the gas proportional valve at different ascending gears according to the difference between the preset temperature and the water inlet temperature detected by the water inlet temperature sensor.
Preferably, the control program of the main controller is provided with two or more up-shift gears, each up-shift gear defines a maximum heat load Φmax, and each maximum heat load Φmax corresponds to the maximum gas flow opening Vmax of the gas proportional valve of the up-shift gear.
Preferably, the gas flow opening of the gas proportional valve is linearly related to the gas proportional valve current, and the maximum gas flow opening Vmax of the gas proportional valve in the upshift gear corresponds to the maximum gas proportional valve current Imax.
Preferably, the up-shift gear maximum heat load Φmax is determined by the following formula according to the calculation formula of the heat generating capacity of the gas water heater:
the heat load phi max required by the heat generating water capacity (Mt) of each up-shift gear is calculated in a reverse way,
wherein,
M t -temperature rise of generated hot water t= (t) w2 -t w1 ) The capacity of generating hot water in K is kg/min;
phi-temperature rise of hot water t= (t) w2 -t w1 ) The heat load at K is in kW;
η t -temperature rise of generated hot water t= (t) w2 -t w1 ) The thermal efficiency at K is given in units of;
c-specific heat of water, 4.19X10) -3 MJ/(kg·K)；
Δt-temperature rise of produced hot water (Δt=t) w2 -t w1 =25), in K.
Preferably, the upshift gear maximum gas proportional valve current Imax is determined by the following formula according to the calculation formula of the gas water heater heat load:
the gas consumption Vmax required by the maximum heat load phi max of the upshift gear is reversely calculated, and the maximum gas proportional valve current Imax of the upshift gear is determined by the gas proportional valve gas flow opening characteristic curve,
phi is 15 ℃, the actual measurement conversion heat load of the atmospheric pressure is 101.3kPa in the dry state of the fuel gas, and the unit is kW;
Q 1 15 ℃ and atmospheric pressure of 101.3kPa reference gas low heating value, the unit is MJ/Nm 3 ；
V-actually measured flow of gas flowmeter, unit is m 3 /h；
P a Atmospheric pressure at the time of the test, in kPa;
P m -measuring the gas pressure passing through the gas flowmeter in kPa;
p g -actually measuring the gas pressure in front of the water heater, wherein the unit is kPa;
t g the unit of the temperature of the fuel gas passing through the fuel gas flowmeter during measurement is the temperature;
d-relative density of dry test gas;
d r -relative density of the reference gas.
Preferably, a water flow sensor for measuring the water flow rate of the water inlet and an electric water regulating valve for regulating the water flow rate of the water inlet are arranged on a water inlet channel of the gas water heater body, a water outlet temperature sensor for measuring the water outlet temperature is arranged at a hot water outlet end of the gas water heater body, and the water flow sensor, the electric water regulating valve and the water outlet temperature sensor are electrically connected with the main controller; when the water supply pressure is too high or the water inlet temperature is too low, and the maximum heat load corresponding to the upshift gear of the gas water heater still cannot enable the water outlet temperature to reach the preset temperature, the electric water regulating valve regulates the water flow to the actually required water flow through the regulating command output by the main controller, so that the water outlet temperature reaches the preset temperature.
Preferably, the operation display is provided with a free variable-lift key; when the free variable lifting key is pressed, the free variable lifting mode is entered, and the main controller automatically sets the lifting gear; and when the free variable lifting key is pressed again, the gas water heater exits the free variable lifting mode, and works according to the rated lifting number, and the maximum working heat load is the rated heat load of the gas water heater.
Preferably, the preset temperature is a default temperature set in a control program of the main controller.
Preferably, the temperature setting key comprises a heating key and a cooling key.
Preferably, the temperature setting key is a single key or a combination key.
After the technical scheme is adopted, the beneficial effects of the invention are as follows:
according to the intelligent gas water heater with the variable lift function, the main controller changes the gas flow opening degree by adjusting the working current of the gas proportional valve so as to control the heat load of the water heater, and the maximum opening degree of the gas proportional valve is automatically set at different lift gears according to the preset temperature, so that the lift suitable for users can be automatically set according to the preset temperature, and the water use requirements of the users in different occasions are met. When in actual use, a user only needs to preset the water outlet temperature, and the main controller can automatically match with a proper upshift gear. When the winter weather is colder, the preset temperature is higher, the water heater is automatically set to be in a large-rise gear, the operable maximum load is improved, and the water outlet temperature reaches the preset value. When the weather is hot in summer, the preset temperature is low, the water heater automatically sets a small-up gear, and the operable maximum load is reduced, so that the purpose of saving water and fuel gas is achieved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description will briefly explain the drawings of the embodiments, and it will be apparent to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a system integration diagram of embodiment 1 of the present invention;
FIG. 2 is a graph of fuel gas proportional valve current versus heat load in accordance with the present invention;
FIG. 3 is a schematic diagram of the gas flow opening characteristic of the gas proportional valve of the present invention;
FIG. 4 is a diagram showing the upshift range temperature range in the embodiment 1 of the present invention;
FIG. 5 is a schematic diagram of an additional free-rise key of embodiment 1 of the present invention;
FIG. 6 is a schematic illustration of an added electrically powered water regulating valve and water flow sensor of embodiment 1 of the present invention;
FIG. 7 is a system integration diagram of embodiment 2 of the present invention;
FIG. 8 is a diagram showing the upshift range temperature range according to embodiment 2 of the present invention;
FIG. 9 is a schematic diagram of an additional free-rise key of embodiment 2 of the present invention;
FIG. 10 is a schematic illustration of an added electrically powered water regulating valve and water flow sensor of embodiment 2 of the present invention;
FIG. 11 is a system integration diagram of embodiment 3 of the present invention;
FIG. 12 is a heat load Φ of example 3 of the present invention Is required to Graph with temperature difference DeltaT;
FIG. 13 is a schematic diagram of an additional free-rise key of embodiment 3 of the present invention;
fig. 14 is a schematic view of an added electric water regulating valve and water flow sensor of embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
The embodiment mainly introduces an intelligent gas water heater which can automatically change the water heater lifting number according to the preset temperature and can normally work under the maximum load corresponding to the lifting number, and the corresponding drawings of the embodiment are shown in fig. 1-6.
As shown in fig. 1, the intelligent gas water heater with the variable-lift function comprises a gas water heater body 1, a gas proportional valve 2, a main controller 3 and an operation display 4. The gas proportional valve 2 is arranged on a gas supply channel of the gas water heater body 1, the main controller 3 is arranged on the gas water heater body 1, and the gas proportional valve 2 and the operation display 4 are electrically connected with the main controller 3. The operation display 4 is provided with a temperature setting key 41, and the main controller 3 automatically sets the maximum opening of the fuel gas proportional valve 2 at different upshift gears according to a preset temperature preset by the temperature setting key 41.
In this embodiment, the operation display 4 displays a preset temperature 42, and the operation display 4 displays an upshift gear 43. The control program of the main controller 3 is provided with three up-shift gears, namely 8 liters, 10 liters and 12 liters, each up-shift gear respectively limits a maximum heat load phi max, and each maximum heat load phi max corresponds to the maximum gas flow opening Vmax of the gas proportional valve of the up-shift gear. In this embodiment, the temperature setting key 41 includes a heating key and a cooling key, and the temperature setting key 41 may be a single key or a combination key. In this embodiment, the preset temperature 42 of the gas water heater may be a default temperature set in the control program of the main controller 3.
The gas flow opening of the gas proportional valve 2 has a linear relation with the gas proportional valve current, so that the maximum gas flow opening of the gas proportional valve of each upshift gear corresponds to a maximum gas proportional valve current Imax respectively. As shown in fig. 3, the maximum fuel gas proportional valve current for 8 upshifts is Ia, the maximum fuel gas proportional valve current for 10 upshifts is Ib, and the maximum fuel gas proportional valve current for 12 upshifts is Ic.
In actual use, the main controller 3 automatically sets an up-shift gear according to a temperature interval in which a preset temperature is located, so that the water heater is limited to work below a maximum thermal load phi max corresponding to the up-shift gear, namely, the gas proportional valve 2 is limited to work below a maximum gas proportional valve current Imax corresponding to the up-shift gear.
As shown in fig. 2, the gas proportional valve operating current versus the water heater heat load curve S is an increasing curve. Taking a 12-liter water heater as an example, in the figure, the point A is 4kW of the minimum heat load of the water heater, the point B is 16kW of the maximum heat load of 8-liter gears, the point C is 20kW of the maximum heat load of 10-liter gears, and the point D is 24kW of the maximum heat load of 12-liter gears (namely the rated heat load of the water heater).
As shown in fig. 3 and 4, the gas flow rate opening characteristic curve R of the gas proportional valve is an increasing curve. In the embodiment, when the preset temperature is less than 40 ℃, the main controller 3 automatically sets the up-shift gear of the water heater to 8 liters, and the working current adjustable interval of the gas proportional valve is 0-Ia; when the preset temperature is more than or equal to 40 ℃ and less than 50 ℃, the main controller 3 automatically sets the up-shift gear of the water heater to 10 liters, and the working current adjustable interval of the fuel gas proportional valve is 0-Ib; when the preset temperature is more than or equal to 50 ℃, the controller automatically sets the up-shift gear of the water heater to be 12L, and the working current adjustable interval of the fuel gas proportional valve is 0-Ic.
The method for determining the maximum heat load phi max of each upshift gear comprises the following steps: according to the calculation formula of the heat generating capacity of the gas water heater:
the thermal load Φmax required by the heat generating water capacity (Mt) of each upshift gear is calculated in a reverse way.
Wherein,
M t -temperature rise of generated hot water t= (t) w2 -t w1 ) The capacity of generating hot water at K is expressed in kilograms per minute (kg/min); phi-temperature rise of hot water t= (t) w2 -t w1 ) The heat load at K is in kilowatts (kW);
η t -temperature rise of generated hot water t= (t) w2 -t w1 ) The thermal efficiency at K is given in units of;
c-specific heat of water, 4.19X10) -3 MJ/(kg·K)；
Δt-temperature rise of produced hot water (Δt=t) w2 -t w1 =25), in units of on (K).
The method for determining the maximum fuel gas proportional valve current Imax of each upshift gear comprises the following steps: according to the calculation formula of the heat load of the gas water heater:
the gas consumption Vmax required by the maximum heat load Φmax of each up-shift stage is reversely calculated, and the maximum gas proportional valve current Imax of the up-shift stage is determined by the gas proportional valve gas flow opening characteristic curve shown in fig. 2.
Wherein,
phi-15 ℃, atmospheric pressure of 101.3kPa, actual measurement of the converted heat load in the dry state of fuel gas, the unit is kilowatt (kW);
Q 1 -15 ℃ and atmospheric pressure 101.3kPa baseline gas low heating value in megajoules per cubic meter (MJ/Nm) 3 ) The method comprises the steps of carrying out a first treatment on the surface of the V-actually measured gas flowmeter flow in cubic meters per hour (m 3 /h)；
P a Atmospheric pressure at the time of the test, in kilopascals (kPa);
P m -measuring the gas pressure passing in the gas flowmeter in kilopascals (kPa);
p g -measuring the gas pressure in kilopascals (kPa) before the water heater;
t g the temperature of the fuel gas passing through the fuel gas flowmeter during measurement is measured in degrees centigrade (DEG C);
d-relative density of dry test gas;
d r -relative density of the reference gas.
As a further development of the embodiment of the invention, a free-lifting key 44 is provided on the operating display 4, as shown in fig. 5. Touching the free variable up key 44 can enter a free variable up mode, and the main controller 3 automatically sets up an up gear according to a temperature interval in which a preset temperature is located. When the free variable lifting key 44 is pressed again, the free variable lifting mode is exited, and the water heater works according to the rated lifting number, namely the maximum working heat load is the rated heat load of the water heater. By adding the free lifting key 44, the selection function of the water heater heating capacity can be increased, and the convenience of the user is improved.
As a further improvement of the embodiment of the present invention, as shown in fig. 6, a water flow sensor 5 for measuring the inflow water flow rate and an electric water regulating valve 6 for regulating the inflow water flow rate are disposed on the water inlet channel of the gas water heater body 1, and a water outlet temperature sensor 7 for measuring the water outlet temperature is disposed at the water outlet end of the gas water heater body 1. The water flow sensor 5, the electric water regulating valve 6 and the water outlet temperature sensor 7 are all electrically connected with the main controller 3. After the water heater is started, the main controller 3 automatically sets the up-shift gear 43 according to the temperature interval where the preset temperature 42 is located, and when the water supply pressure is too high or the water inlet temperature is too low, the water heater still cannot reach the preset temperature 42 due to the maximum heat load corresponding to the up-shift gear 43. The electric water regulating valve 6 regulates the water flow to the actually required water flow through the regulating command output by the main controller 3, so that the water outlet temperature reaches the preset temperature 42. Therefore, the water-saving device not only meets the requirement of users on water temperature, but also saves water consumption, and improves the comfort of product use.
In the present embodiment, actually required water flow V Is required to The determination method is that according to the calculation formula of the heat generating capacity of the gas water heater:
the maximum heat load phi max of the up-shift gear and the water flow V measured by the water flow sensor 5 ### The water outlet temperature T measured by the water outlet temperature sensor 7 Out of The above calculation formula is introduced, wherein mt=v Real world 、Ф＝Фmax、△t＝T Out of -T Feeding in From this, the water inlet temperature T at this time is calculated Feeding in 。
And then according to the formula: v (V) Is required to ＝V Real world ×(T Out of -T Feeding in )/(T Pre-preparation -T Feeding in ) Calculate the actually required water flow V Is required to 。
In actual use, the user only needs to preset the water outlet temperature, and the main controller 3 automatically matches the appropriate upshift gear 43. When the winter weather is colder, the preset temperature 42 is higher, the water heater is automatically set to be in a large upshift gear 43, the operable maximum load is improved, and the outlet water temperature reaches the preset value. When the weather is hot in summer, the preset temperature 42 is low, the water heater automatically sets a small upshift gear 43, the maximum load which can be operated is reduced, and the purpose of saving water and fuel gas is achieved.
Example 2
The embodiment mainly describes an intelligent gas water heater which can automatically change the number of water heater according to the temperature interval where the preset temperature and the ambient temperature are located and can normally work under the maximum load corresponding to the number of water heater, and the corresponding diagrams of the embodiment are shown in fig. 7-10.
As shown in fig. 7, the main difference between this embodiment and embodiment 1 is that, based on embodiment 1, the intelligent gas water heater with a variable-rise function further includes an ambient temperature sensor 8 for detecting an ambient temperature, where the ambient temperature sensor 8 is disposed on the housing 11 of the gas water heater body 1, the ambient temperature sensor 8 is electrically connected with the main controller 3, and the main controller 3 automatically sets the maximum gas flow opening of the gas proportional valve 2 at different rising steps 43 according to a temperature interval where the preset temperature and the ambient temperature measured by the ambient temperature sensor 8 are located.
In this embodiment, the preset temperature 42 of the gas water heater can be set by operating the temperature setting key 41. The preset temperature 42 of the gas water heater may be a default temperature set in a control program of the main controller 3. In this embodiment, the control program of the main controller 3 is provided with three up-shift steps 43, which are 8 liters, 10 liters and 12 liters respectively, each up-shift step defines a maximum heat load Φmax, and each maximum heat load Φmax corresponds to the maximum gas flow opening Vmax of the gas proportional valve of the up-shift step.
In actual use, the main controller 3 automatically sets the up-shift gear 43 according to the preset temperature 42 and the temperature interval where the ambient temperature measured by the ambient temperature sensor 8 is located, so that the water heater is limited to work below the maximum thermal load Φmax corresponding to the up-shift gear 43, that is, the gas proportional valve 2 is limited to work below the maximum gas proportional valve current Imax corresponding to the up-shift gear. The temperature interval of the upshift gear in this embodiment is basically characterized in that the preset temperature is high, the ambient temperature is low, and the preset temperature is low, and the ambient temperature is high, and the upshift gear is small.
As shown in fig. 3 and 8, the region I in the upshift temperature range in the present embodiment is 8 upshift, the region II is 10 upshift, and the region III is 12 upshift. When the preset temperature and the environment temperature are in the area I, the main controller 3 automatically sets the up-shift gear of the water heater to 8 liters, and the working current adjustable interval of the gas proportional valve is 0-Ia; when the preset temperature and the environment temperature are in the area II, the main controller 3 automatically sets the up-shift gear of the water heater to 10 liters, and the working current adjustable interval of the gas proportional valve is 0-Ib; when the preset temperature and the environment temperature are in the area III, the controller automatically sets the up-shift gear of the water heater to be 12L, and the working current adjustable interval of the gas proportional valve is 0-Ic.
The method for determining the maximum heat load Φmax of each upshift in this embodiment and the method for determining the maximum fuel gas proportional valve current Imax of each upshift in this embodiment are the same as those of embodiment 1, and refer to embodiment 1.
In actual use, the user only needs to preset the water outlet temperature, and the main controller 3 automatically matches with a proper upshift gear. The gas water heater automatically sets the number of the use liters (namely the hot water generating capacity) suitable for the user according to the preset temperature 42 and the environment temperature, and meets the water use requirements of the user in different occasions. The preset temperature is high in winter, the environment temperature is low, the water heater is automatically set to be in a large-rise gear, the maximum load which can work is improved, and the water outlet temperature reaches a preset value. The preset temperature in summer is low, the environment temperature is high, the water heater automatically sets a small-rise gear, the maximum load which can work is reduced, and the purpose of saving water and fuel gas is achieved.
As a further development of the embodiment of the invention, the operating display 4 can be provided with a free lifting key 44, as shown in fig. 9. Touching the free-rise-changing key 44 can enter a free-rise-changing mode, and the main controller 3 automatically sets up a rise gear according to a temperature interval between the preset temperature 42 and the ambient temperature measured by the ambient temperature sensor 8. If the free variable lifting key 44 is pressed again, the intelligent variable lifting mode is exited, and the water heater works according to the rated lifting number, namely the maximum working heat load is the rated heat load of the water heater. By adding the free lifting key 44, the selection function of the water heater for generating hot water can be increased, and the water heater is more convenient for users to use.
As a further improvement of the embodiment of the present invention, as shown in fig. 10, a water flow sensor 5 for measuring the water flow rate of the water inlet and an electric water regulating valve 6 for regulating the water flow rate of the water inlet are arranged on the water inlet channel of the gas water heater body 1, and the water outlet of the gas water heater body 1 is provided withThe hot water end is provided with a water outlet temperature sensor 7 for measuring the water outlet temperature. The water flow sensor 5, the electric water regulating valve 6 and the water outlet temperature sensor 7 are all electrically connected with the main controller 3. After the water heater is started, the main controller 3 automatically sets an up-shift gear according to the preset temperature and the temperature range in which the ambient temperature is detected by the ambient temperature sensor 8, and when the water supply pressure is too high or the water inlet temperature is too low, the water heater still cannot reach the preset temperature due to the maximum heat load corresponding to the up-shift gear. The electric water regulating valve 6 regulates the water flow to the actually required water flow through the regulating instruction output by the main controller 3, so that the water outlet temperature reaches the preset temperature. Therefore, the water-saving device not only meets the requirement of users on water temperature, but also saves water consumption and improves the use comfort of products. The actual required water flow V in the optimized embodiment Is required to Reference is made to the determination of example 1.
Example 3
The embodiment mainly describes an intelligent gas water heater which can automatically change the water heater lifting number according to the difference value between the preset temperature and the water inlet temperature and can normally work under the maximum load corresponding to the lifting number, and the corresponding drawings of the embodiment are shown in fig. 11-14.
As shown in fig. 11, the main difference between this embodiment and embodiment 1 is that, based on embodiment 1, the intelligent gas water heater with a variable-rise function further includes a water inlet temperature sensor 9 for detecting a water inlet temperature, where the water inlet temperature sensor 9 is disposed at a cold water inlet end of the gas water heater body 1, the water inlet temperature sensor 9 is electrically connected with the main controller 3, and the main controller 3 automatically sets the maximum gas flow opening of the gas proportional valve 2 at different rising steps 43 according to the difference between the preset temperature 42 and the water inlet temperature measured by the water inlet temperature sensor 9.
In actual use, the main controller 3 automatically sets an up-shift position according to the difference between the preset temperature 42 and the water inlet temperature measured by the water inlet temperature sensor 9, so that the water heater is limited to work below the maximum heat load phi max corresponding to the up-shift position, namely, the gas proportional valve 2 is limited to work below the maximum gas proportional valve current Imax corresponding to the up-shift position.
The method for determining the maximum heat load Φmax of each upshift in this embodiment and the method for determining the maximum fuel gas proportional valve current Imax of each upshift in this embodiment are the same as those of embodiment 1, and refer to embodiment 1.
In the invention, the main controller 3 is controlled according to the preset temperature T Pre-preparation With the water inlet temperature T Is provided with The determination method for setting the up-shift gear by the difference DeltaT is as follows: according to the calculation formula of the heat generating capacity of the gas water heater:
the common water flow M Often times Instead of Mt, the preset temperature T Pre-preparation With the water inlet temperature T Is provided with Instead of Δt, the difference Δt between (d) and (d) is derived at the usual water flow M Often times State of water inlet temperature T Is provided with Heating to a preset temperature T Pre-preparation Required heat load phi Is required to Is calculated according to the formula:
Ф is required to ＝C×M Often times ×△T×10 5 /60η t
Specific heat C and common water flow M of reclaimed water Often times Thermal efficiency eta t Are all constant, and can know phi Is required to Has a linear proportional relationship with DeltaT. The main controller 3 calculates the required heat load phi Is required to The up-shift range of the water heater is determined in the up-shift range heat load interval.
As shown in fig. 3 and 12, the common water flow M in the present embodiment Often times =8 kg/min. When the temperature difference DeltaT is less than or equal to T 8 When phi is Is required to The temperature is less than or equal to phi max8, the main controller 3 automatically sets the up-shift gear of the water heater to 8 liters, and the working current adjustable interval of the fuel gas proportional valve 2 is 0-Ia; when T is 8 ＜△T≤T 10 When phi max8 is less than phi Is required to The temperature is less than or equal to phi max10, the main controller 3 automatically sets the up-shift gear of the water heater to 10 liters, and the working current adjustable interval of the fuel gas proportional valve 2 is 0-Ib; when DeltaT > T 10 When phi is Is required to More than phi max10, the main controller 3 is automatically set upThe up-shift gear of the water heater is 12L, and the working current adjustable interval of the gas proportional valve is 0-Ic.
When in actual use, a user only needs to preset the water outlet temperature, and the controller is automatically matched with a proper upshift gear. The gas water heater automatically sets the lifting number (namely the heat generating capacity) suitable for users according to the difference value between the preset temperature and the water inlet temperature, and meets the water use demands of the users in different occasions. When the weather is colder in winter, the difference between the preset temperature and the water inlet temperature is larger, the water heater is automatically set to be in a large-rise gear, the operable maximum load is improved, and the water outlet temperature reaches the preset value. When the weather is hotter in summer, the difference between the preset temperature and the water inlet temperature is smaller, the water heater automatically sets a small-rise gear, the operable maximum load is reduced, and the purpose of saving water and fuel gas is achieved.
As a further development of the embodiment of the invention, a free-lifting key 44 is provided on the operating display 4, as shown in fig. 13. Touching the free variable up key 44 can enter a free variable up mode, and the main controller 3 automatically sets up an up gear according to the difference between the preset temperature and the water inlet temperature. When the free variable lifting key 44 is pressed again, the free variable lifting mode is exited, and the water heater works according to the rated lifting number, namely the maximum working heat load is the rated heat load of the water heater. By adding the free lifting key 44, the selection function of the water heater heating capacity can be increased, and the convenience of the user is improved.
As a further improvement of the embodiment of the present invention, as shown in fig. 14, a water flow sensor 5 for measuring the inflow water flow rate and an electric water regulating valve 6 for regulating the inflow water flow rate are disposed on the water inlet channel of the gas water heater body 1, and a water outlet temperature sensor 7 for measuring the water outlet temperature is disposed at the water outlet end of the gas water heater body 1. The water flow sensor 5, the electric water regulating valve 6 and the water outlet temperature sensor 7 are all electrically connected with the main controller 3. After the water heater is started, the main controller 3 automatically sets the up-shift gear 43 according to the difference value between the preset temperature and the water inlet temperature, and when the water supply pressure is too high or the water inlet temperature is too low, the water heater still cannot enable the water outlet temperature to reach the preset temperature 42 due to the fact that the maximum heat load corresponding to the up-shift gear 43 is reached by the water heater. At this time, the main controller 3 can control the temperature according to the preset temperature T Pre-preparation The water inlet temperature T measured by the water inlet temperature sensor 9 Feeding in The water flow sensor 5 measures the water flow V Real world The water outlet temperature T measured by the water outlet temperature sensor 7 Out of According to the formula:
V is required to ＝V Real world ×(T Out of -T Feeding in )/(T Pre-preparation -T Feeding in )
Calculating the actual required water flow V Is required to And outputs an adjusting instruction to the electric water adjusting valve 6 to adjust the water flow to the actually required water flow, so that the water outlet temperature reaches the preset temperature.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. An intelligent gas water heater with become function of rising, its characterized in that: the automatic water heater control device comprises a gas water heater body, a gas proportional valve, a main controller, an operation display, a water flow sensor, an electric water regulating valve and a water outlet temperature sensor, wherein the gas proportional valve is arranged on a gas supply channel of the gas water heater body, the main controller is arranged on the gas water heater body, the gas proportional valve and the operation display are electrically connected with the main controller, the main controller changes the opening degree of the gas flow through adjusting the working current of the gas proportional valve so as to control the heat load of the water heater, a temperature setting key and a free variable lifting key are arranged on the operation display, and the main controller automatically sets a lifting gear by pressing the free variable lifting key; the free variable lifting key is pressed again, the free variable lifting mode is exited, the main controller automatically sets the maximum opening of the fuel gas proportional valve at different lifting gears according to the preset temperature preset by the temperature setting key, and the maximum working heat load is the rated heat load of the fuel gas water heater;
the water flow sensor and the electric water regulating valve are arranged on a water inlet channel of the gas water heater body and are respectively used for measuring water inflow and regulating water inflow, the water outlet temperature sensor is arranged at a hot water outlet end of the gas water heater body and is used for measuring water outlet temperature, and the water flow sensor, the electric water regulating valve and the water outlet temperature sensor are electrically connected with the main controller; when the water supply pressure is too high or the water inlet temperature is too low, and the maximum heat load corresponding to the upshift gear of the gas water heater still cannot enable the water outlet temperature to reach the preset temperature, the electric water regulating valve regulates the water flow to the actually required water flow through the regulating command output by the main controller, so that the water outlet temperature reaches the preset temperature.
2. The intelligent gas water heater with variable lift function of claim 1, wherein: still further including the ambient temperature sensor that is used for detecting ambient temperature, ambient temperature sensor sets up on the shell of gas heater body, ambient temperature sensor with the main control unit electricity is connected, main control unit is according to preset temperature with ambient temperature that ambient temperature sensor measured is in the temperature interval will the maximum gas flow aperture of gas proportional valve is automatic to be set at different upshift gears.
3. The intelligent gas water heater with variable lift function of claim 1, wherein: still further including being used for detecting the temperature of intaking into water temperature sensor, it is in to intake water temperature sensor sets up the cold water entering end department of gas heater body, intake water temperature sensor with the main control unit electricity is connected, main control unit is according to preset temperature with intake water temperature sensor detects intake water temperature's difference will the maximum gas flow aperture of gas proportional valve is automatic to be set up in different liter numerical gear.
4. An intelligent gas water heater with variable lift function according to any one of claims 1-3, characterized in that: the control program of the main controller is provided with two or more up-shift gears, each up-shift gear respectively limits a maximum heat load phi max, and each maximum heat load phi max corresponds to the maximum gas flow opening Vmax of the gas proportional valve of the up-shift gear.
5. The intelligent gas water heater with variable lift function of claim 4, wherein: the gas flow opening of the gas proportional valve is linearly related to the gas proportional valve current, and the maximum gas flow opening Vmax of the gas proportional valve in the upshift gear corresponds to the maximum gas proportional valve current Imax respectively.
6. The intelligent gas water heater with variable lift function of claim 5, wherein: the maximum heat load phi max of the upshift gear is determined by the following method, and the calculation formula of the heat generating capacity of the gas water heater is adopted:
the heat load phi max required by the heat generating water capacity (Mt) of each up-shift gear is calculated in a reverse way,
wherein,
M t -temperature rise of generated hot water t= (t) w2 -t w1 ) The capacity of generating hot water in K is kg/min;
phi-temperature rise of hot water t= (t) w2 -t w1 ) The heat load at K is in kW;
η t -temperature rise of generated hot water t= (t) w2 -t w1 ) The thermal efficiency at K is given in units of;
c-specific heat of water, 4.19X10) -3 MJ/(kg·K)；
Δt-temperature rise of produced hot water (Δt=t) w2 -t w1 =25), in K.
7. The intelligent gas water heater with variable lift function of claim 6, wherein: the maximum fuel gas proportional valve current Imax of the upshift gear is determined by the following method, and according to a calculation formula of the heat load of the fuel gas water heater:
the gas consumption Vmax required by the maximum heat load phi max of the upshift gear is reversely calculated, and the maximum gas proportional valve current Imax of the upshift gear is determined by the gas proportional valve gas flow opening characteristic curve,
phi is 15 ℃, the actual measurement conversion heat load of the atmospheric pressure is 101.3kPa in the dry state of the fuel gas, and the unit is kW;
Q 1 15 ℃ and atmospheric pressure of 101.3kPa reference gas low heating value, the unit is MJ/Nm 3 ；
V-actually measured flow of gas flowmeter, unit is m 3 /h；
P a Atmospheric pressure at the time of the test, in kPa;
P m -measuring the gas pressure passing through the gas flowmeter in kPa;
p g -actually measuring the gas pressure in front of the water heater, wherein the unit is kPa;
t g the unit of the temperature of the fuel gas passing through the fuel gas flowmeter during measurement is the temperature;
d-relative density of dry test gas;
d r -relative density of the reference gas.
8. An intelligent gas water heater with variable lift function according to any one of claims 1-3, characterized in that: the preset temperature is a default temperature set in a control program of the main controller.
9. An intelligent gas water heater with variable lift function according to any one of claims 1-3, characterized in that: the temperature setting key comprises a heating key and a cooling key.
10. An intelligent gas water heater with variable lift function according to any one of claims 1-3, characterized in that: the temperature setting key is a single key or a combination key.
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