CN115218478A - Electric water heater and working method thereof - Google Patents
Electric water heater and working method thereof Download PDFInfo
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- CN115218478A CN115218478A CN202110440162.7A CN202110440162A CN115218478A CN 115218478 A CN115218478 A CN 115218478A CN 202110440162 A CN202110440162 A CN 202110440162A CN 115218478 A CN115218478 A CN 115218478A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 675
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 80
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000008236 heating water Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 4
- 206010053615 Thermal burn Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000003825 pressing Methods 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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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
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to an electric water heater and a working method thereof.A controller presets a water regulating valve according to a first water temperature, a second water temperature and a preset water outlet temperature at a mixed water outlet end when the electric water heater is in a starting state and a water valve of the electric water heater is not opened; in addition, when the electric water heater is in a starting state and a water valve of the electric water heater is opened, the controller also finely adjusts the water regulating valve according to the first water temperature, the second water temperature and the third water temperature so as to enable the third water temperature to be in line with the preset outlet water temperature. Therefore, after the electric water heater is started, the water-saving valve is preset when the water-using valve of the electric water heater is not opened, so that the bad phenomenon that a user is scalded due to overhigh temperature of hot water flowing out from the water outlet end of mixed water at the moment of opening the water-using valve can be avoided, and in addition, the actual water outlet temperature regulation (namely, the third water temperature) is high in regulation speed and can be accurately controlled.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to an electric water heater and a working method thereof.
Background
In the conventional constant temperature technology of an electric water heater, an actual measured value of an actual outlet water temperature is compared with a set temperature value, and the actual outlet water temperature is adjusted to reach the set temperature by further adjusting a constant temperature water valve according to a comparison result. In the traditional adjusting scheme, the water heater needs to obtain the actual outlet water temperature of the output hot water after the hot water is output, and the constant-temperature water valve can be adjusted according to the actual outlet water temperature of the output hot water, so that the hysteresis of the whole process is serious, the adjusting speed is slow, and the adverse phenomenon that the user is scalded by the hot water at the initial stage of opening the constant-temperature water valve is very likely to occur.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide an electric water heater, which can effectively avoid the bad phenomenon that hot water scalds users, and the actual outlet water temperature adjustment speed is fast and can be precisely controlled.
The second technical problem to be solved by the present invention is to provide a working method of an electric water heater, which can effectively avoid the bad phenomenon that hot water scalds users, and the actual outlet water temperature is adjusted at a higher speed and can be accurately controlled.
The first technical problem is solved by the following technical scheme:
an electric water heater, comprising: the water storage device comprises a body, a water storage tank and a water storage tank, wherein the body is provided with an inner container for storing water; the hot water outlet pipe and the cold water inlet pipe are arranged on the inner container and are connected with the inner containerThe inner containers are communicated; the water regulating valve is provided with a cold water inlet end, a hot water inlet end, a mixed water outlet end and a regulating valve core, wherein the cold water inlet end and the cold water inlet pipe are communicated with a cold water supply pipe, the hot water inlet end is communicated with the hot water outlet pipe, and the regulating valve core can regulate the first water flow Q of the water flow in the cold water inlet end flowing into the mixed water outlet end 1 And can also regulate the second water flow Q of the water flow at the hot water inlet end flowing into the mixed water outlet end 2 (ii) a The water tank comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature sensor is used for detecting first water temperature in the inner container, the second temperature sensor is used for detecting second water temperature at the cold water inlet end, and the third temperature sensor is used for detecting third water temperature at the mixed water outlet end; the controller is respectively electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the water regulating valve; the controller is used for presetting the water regulating valve according to the first water temperature, the second water temperature and the preset outlet water temperature at the outlet end of the mixed water when the electric water heater is in a starting state and a water valve of the electric water heater is not opened; the controller is further configured to, when the electric water heater is in a power-on state and a water valve of the electric water heater is opened, finely adjust the water adjusting valve according to the first water temperature, the second water temperature, and the third water temperature so that the third water temperature corresponds to the preset outlet water temperature.
Compared with the background technology, the electric water heater of the invention has the following beneficial effects: when the electric water heater is in a starting state and a water valve of the electric water heater is not opened, the controller pre-adjusts the water adjusting valve according to the first water temperature, the second water temperature and the preset outlet water temperature of the mixed water outlet end; in addition, when the electric water heater is in a starting state and a water using valve of the electric water heater is opened, the controller further finely adjusts the water adjusting valve according to the first water temperature, the second water temperature and the third water temperature so as to enable the third water temperature to be in line with the preset outlet water temperature. Therefore, after the electric water heater is started, when the water valve of the electric water heater is not opened, the water valve is preset, so that the bad phenomenon that a user is scalded due to overhigh temperature of hot water flowing out from the water outlet end of mixed water at the moment of opening the water valve can be avoided, and in addition, the actual water outlet temperature (namely the third water temperature) is high in regulation speed and can be accurately controlled.
In one embodiment, the controller is further configured to adjust the water adjusting valve according to the first water temperature and the water temperature in the inner container when the electric water heater is in a standby state.
In one embodiment, the electric water heater further comprises a heater which is arranged on the body and used for heating the water in the inner container, and an on-off switch, wherein the heater is electrically connected with a power bus through the on-off switch; the power bus is used for being electrically connected to a power supply device; the controller is electrically connected with the on-off switch, and the controller is also used for controlling the on-off switch to be switched on or switched off according to the first water temperature and the preset water temperature of the inner container when the electric water heater is in a starting state.
In one embodiment, the water regulating valve comprises a valve body and a stepping motor arranged on the valve body; the adjusting valve core is rotationally arranged on the valve body, the stepping motor drives the adjusting valve core to rotate, and the stepping motor is electrically connected with the controller; the adjusting valve core is provided with a first stop block for blocking the cold water inlet end and a second stop block for blocking the hot water inlet end; when the adjusting valve core drives the first stop block and the second stop block to rotate, the first water flow Q can be synchronously adjusted 1 Magnitude and second water flow Q 2 Size.
In one embodiment, a first gear is arranged on a rotating shaft of the stepping motor, the end part of the regulating valve core penetrates through the valve body and is provided with a second gear, and the first gear is meshed with the second gear.
In one embodiment, the water regulating valve further comprises a reset switch arranged on the valve body, and the reset switch is electrically connected with the controller; when the first stop block completely blocks the cold water inlet end or the second stop block completely blocks the hot water inlet end, the reset switch can sense the rotating position of the adjusting valve core and is used for resetting the stepping motor.
In one embodiment, the electric water heater further comprises a display module and/or an operation module arranged on the body; the display module and the operation module are electrically connected with the controller; the display module is used for displaying the first water temperature, the second water temperature, the third water temperature and the preset outlet water temperature; the operation module is used for adjusting the preset outlet water temperature.
The second technical problem is solved by the following technical solutions:
an operating method of an electric water heater comprises the following steps:
when the electric water heater is in a starting state and a water valve of the electric water heater is not opened, acquiring a first water temperature in the inner container and a second water temperature at a cold water inlet end, and pre-adjusting a water adjusting valve of the electric water heater according to the first water temperature, the second water temperature and a preset water outlet temperature at a mixed water outlet end;
when the electric water heater is in a starting state and a water valve of the electric water heater is opened, acquiring a first water temperature in the inner container, a second water temperature at a cold water inlet end and a third water temperature at a mixed water outlet end, and finely adjusting the water adjusting valve according to the first water temperature, the second water temperature and the third water temperature so as to enable the third water temperature to be in accordance with the preset water outlet temperature.
Compared with the background technology, the working method of the electric water heater of the invention has the following beneficial effects: after the electric water heater is started, when a water valve of the electric water heater is not opened, the water valve is preset, so that the bad phenomenon that a user is scalded due to the fact that the temperature of hot water flowing out of a mixed water outlet end is too high can be avoided at the moment that the water valve is opened, in addition, the actual outlet water temperature regulation (namely, the third water temperature) is high in regulation speed, and accurate control can be achieved.
In one embodiment, when the electric water heater is in a standby state, a first water temperature in the inner container is obtained, and the water regulating valve is regulated according to the first water temperature and the water temperature in the inner container.
In one embodiment, when the electric water heater is in a power-on state, a first water temperature in the inner container is obtained, and the on-off switch of the heater for connecting to a power supply bus is controlled to be switched on or switched off according to the first water temperature and a preset water temperature of the inner container.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an electric water heater according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a regulating valve and a cold water supply pipe of an electric water heater according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an electric water heater according to an embodiment of the present invention, when a regulating valve core of a regulating water valve rotates to a first limit position;
FIG. 4 is a schematic structural diagram of an electric water heater according to an embodiment of the present invention, when a regulating valve core of a regulating water valve rotates to a second limit position;
FIG. 5 is a schematic view illustrating a water flow state when a regulating valve core of a regulating water valve of an electric water heater is located at a first limit position according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a water flow state when a regulating valve core of a regulating water valve of an electric water heater is located at a second limit position according to an embodiment of the present invention;
FIG. 7 is a schematic view illustrating a water flow state when a regulating valve core of a regulating water valve of an electric water heater is located at a position between a first limit position and a second limit position according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a control structure of an electric water heater according to an embodiment of the present invention.
Reference numerals:
10. a body; 11. an inner container; 20. a hot water outlet pipe; 30. a cold water inlet pipe; 40. adjusting a water valve; 41. a cold water inlet end; 42. a hot water inlet end; 43. a mixed water outlet end; 44. adjusting the valve core; 441. a first stopper; 442. a second stopper; 45. a valve body; 46. a stepping motor; 47. a first gear; 48. a second gear; 49. a reset switch; 51. a first temperature sensor; 52. a second temperature sensor; 53. a third temperature sensor; 54. a water flow sensor; 60. a controller; 70. a cold water supply pipe; 80. a heater; 91. an on-off switch; 92. a power bus; 93. a weak current module; 94. a display module; 95. and an operation module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an electric water heater according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a regulating water valve 40 and a cold water supply pipe 70 of an electric water heater according to an embodiment of the present invention. An embodiment of the present invention provides an electric water heater, including: body 10, hot water outlet pipe 20, cold water inlet pipe 30, regulation water valve 40, first temperature sensor51. A second temperature sensor 52, a third temperature sensor 53 and a controller 60. The body 10 is provided with an inner container 11 for storing water. The hot water outlet pipe 20 and the cold water inlet pipe 30 are both arranged on the inner container 11 and are communicated with the inner container 11. The water regulating valve 40 has a cold water inlet 41, a hot water inlet 42, a mixed water outlet 43, and a regulating valve core 44. The cold water inlet end 41 and the cold water inlet pipe 30 are both used for being communicated with a cold water supply pipe 70, the hot water inlet end 42 is communicated with the hot water outlet pipe 20, and the adjusting valve core 44 can adjust the first water flow Q that the water flow in the cold water inlet end 41 flows into the mixed water outlet end 43 1 And a second flow Q for regulating the flow of the hot water from the inlet end 42 to the outlet end 43 of the mixed water 2 . The first temperature sensor 51 is used for detecting a first water temperature inside the inner container 11, the second temperature sensor 52 is used for detecting a second water temperature at the cold water inlet end 41, and the third temperature sensor 53 is used for detecting a third water temperature at the mixed water outlet end 43.
Referring to fig. 8, fig. 8 is a schematic diagram illustrating a control structure of an electric water heater according to an embodiment of the invention. The controller 60 is electrically connected to the first temperature sensor 51, the second temperature sensor 52, the third temperature sensor 53 and the regulating water valve 40. The controller 60 is configured to preset the water regulating valve 40 according to the first water temperature, the second water temperature, and a preset outlet water temperature at the mixed water outlet end 43 when the electric water heater is in the on state and the water valve of the electric water heater is not opened. The controller 60 is further configured to, when the electric water heater is in the on state and the water valve of the electric water heater is opened, finely adjust the water-saving valve 40 according to the first water temperature, the second water temperature, and the third water temperature so that the third water temperature is in accordance with the preset outlet water temperature.
In the electric water heater, when the electric water heater is in a power-on state and a water valve of the electric water heater is not opened, the controller 60 pre-adjusts the water adjusting valve 40 according to the first water temperature, the second water temperature and the preset outlet water temperature of the mixed water outlet end 43; in addition, when the electric water heater is in the on state and the water valve of the electric water heater is opened, the controller 60 further finely adjusts the water regulating valve 40 according to the first water temperature, the second water temperature, and the third water temperature so that the third water temperature is in accordance with the preset outlet water temperature. Therefore, after the electric water heater is started, when the water valve of the electric water heater is not opened, the water valve 40 is preset, so that the bad phenomenon that the user is scalded due to overhigh temperature of hot water flowing out from the mixed water outlet end 43 at the moment of opening the water valve can be avoided, and in addition, the actual outlet water temperature (namely the third water temperature) is regulated at a high speed and can be accurately controlled.
Referring to fig. 1 and 2, in particular, the method for pre-adjusting the water adjusting valve 40 according to the first water temperature, the second water temperature and the preset outlet water temperature of the mixed water outlet end 43 includes:
according to the amount of rotation
To adjust the rotational position of the regulating valve spool 44 of the regulating water valve 40. Wherein theta is the rotation quantity of the regulating valve core 44, and the water flow of the first water flow can be correspondingly regulated to be Q by changing the rotation quantity theta 1 And adjusting the flow rate of the second water flow to Q 2 The size of (2). Q is the total water flow of the electric water heater, Q 1 For the flow rate, Q, of the first water flow supplied to the cold water inlet 41 2 For the flow rate, T, of the second water supplied to the cold water inlet pipe 30 1 Is the water temperature in the inner container 11, i.e. the temperature detected by the first temperature sensor 51, T 2 Is the water temperature of the cold water inlet end 41, i.e. the temperature detected by the second temperature sensor 52, T 3 The water temperature at the outlet end 43 of the mixed water is the temperature detected by the third temperature sensor 53.
It should be noted that the flow rate of water supplied to the hot water inlet end 42 from the hot water outlet pipe 20 of the electric water heater is also Q 2 According to the principle of balance between entrance and exit, Q = Q 1 +Q 2 (ii) a And according to the law of conservation of energy, the heat absorbed by cold water during mixing is equal to the heat released by hot water, CQ 1 (T 3 -T 2 )＝CQ 2 (T 1 -T 3 ) Wherein C is the specific heat constant of water, and therefore
Because of this
Is the mixing proportion of the hot water in the mixing process, therefore, in the actual adjusting process, the actual rotation angle theta is the rotation quantity of the total rotation angle alpha according to the ratio, namely
In addition, the method of finely adjusting the water regulating valve 40 according to the first water temperature, the second water temperature, and the third water temperature so that the third water temperature coincides with the preset outlet water temperature includes:
if the third water temperature is equal to the preset outlet water temperature, the position of the regulating valve core 44 of the regulating water valve 40 is kept unchanged, that is, the stepping motor 46 for controlling the rotation of the regulating valve core 44 is kept unchanged without adjustment; if the third water temperature is higher than the preset outlet water temperature, the position of the regulating valve core 44 of the regulating water valve 40 needs to be regulated to enable the first water flow Q to flow 1 Increase, and second water flow Q 2 Decreasing, that is, the controller 60 controls the stepping motor 46 to rotate toward the direction B', and drives the regulating valve core 44 to rotate toward the direction B synchronously; if the third water temperature is lower than the preset outlet water temperature, the position of the regulating valve core 44 of the regulating water valve 40 needs to be regulated so that the first water flow Q 1 Reduced, and a second water flow Q 2 The controller 60 controls the stepping motor 46 to rotate in the direction of a', and the adjustment valve core 44 is driven to rotate in the direction of a synchronously.
Thus, when the third water temperature is equal to the preset outlet water temperature, the ratio of the cold water to the hot water is proper, and the ratio of the cold water to the hot water is not required to be adjusted, so that the position of the stepping motor 46 is kept unchanged; when the third water temperature is higher than the preset outlet water temperature, it is indicated that the hot water ratio is larger in the mixing ratio and the cold water ratio is smaller, so that the stepping motor 46 is controlled to rotate in the direction B', the second gear 48 is driven to rotate in the direction B, the adjusting valve core 44 is further driven to rotate in the direction B, and the first water flow Q at the cold water inlet end 41 is increased 1 Opening degree of (3), reducing the second water flow Q of the hot water inlet end 42 2 The opening degree of (c); otherwise, when the third water temperature is lower than the preset temperatureWhen the temperature of the outlet water is set, it is indicated that the proportion of hot water in the mixing water proportion is smaller and the proportion of cold water is larger, so that the stepping motor 46 is controlled to rotate towards the direction A', the second gear 48 is driven to rotate towards the direction A, the adjusting valve core 44 is further driven to rotate towards the direction A, and the first water flow Q at the cold water inlet end 41 is reduced 1 To increase the second water flow Q of the hot water inlet end 42 2 The opening degree of (c).
The electric water heater further includes a water flow rate sensor 54 disposed on the cold water supply pipe 70, and the water flow rate sensor 54 is used for acquiring the water flow rate on the cold water supply pipe 70, that is, the total water flow rate Q of the electric water heater. The water flow sensor 54 is electrically connected to the controller 60, and feeds back the collected water flow information on the cold water supply pipe 70 to the controller 60.
It should be noted that, in general, in order to prevent the hot water at the mixed water outlet end from scalding the user, the preset range of the temperature of the outlet water is usually 30 ℃ to 55 ℃, and if the preset range of the temperature of the outlet water is set to a temperature exceeding the temperature range, especially to other values higher than 55 ℃, the preset range of the temperature of the outlet water needs to be set through special operations on the operation module 95 of the electric water heater. Special operations such as: the parameter can be set by pressing the setting button 3S of the operation module 95 (specifically, for example, a touch panel) for a long time or by unlocking the operation module with a plurality of combination buttons.
It should be noted that the water valve, not shown in the drawings, is disposed on the drain pipe connected to the mixing outlet end, and when the water valve is opened, the water in the electric water heater or the water in the cold water supply pipe 70 is discharged through the mixing outlet end and the drain pipe; when the water valve is closed, no water is discharged from the water discharge pipe.
Referring to fig. 1 and 8 again, in one embodiment, the controller 60 is further configured to adjust the water-adjusting valve 40 according to the first water temperature and the water temperature in the liner 11 when the electric water heater is in a standby state. Thus, when the water heater is in a standby state, the controller 60 can adjust the water-adjusting valve 40 according to the first water temperature and the water temperature in the inner container 11, so that the bad phenomenon that a user is scalded due to opening the water-using valve in the standby state can be avoided.
Referring to fig. 3 to 6, fig. 3 shows a schematic structural view when an adjusting valve core 44 of an adjusting water valve 40 of an electric water heater according to an embodiment of the present invention rotates to a first limit position, fig. 4 shows a schematic structural view when the adjusting valve core 44 of the adjusting water valve 40 of the electric water heater according to an embodiment of the present invention rotates to a second limit position, fig. 5 shows a schematic water flow state when the adjusting valve core 44 of the adjusting water valve 40 of the electric water heater according to an embodiment of the present invention is located at the first limit position, and fig. 6 shows a schematic water flow state when the adjusting valve core 44 of the adjusting water valve 40 of the electric water heater according to an embodiment of the present invention is located at the second limit position. Specifically, when the electric water heater is in a standby state, the method for adjusting the water-adjusting valve 40 according to the first water temperature and the water temperature in the inner container 11 includes: when the first water temperature is lower than the water temperature in the inner container 11, the controller 60 controls the water regulating valve 40 to operate at the second water flow Q 2 For example, a state of adjusting to the maximum opening degree (as shown in fig. 4 and 6); when the first water temperature is higher than the water temperature in the inner container 11, the controller 60 controls the water regulating valve 40 to operate at the second water flow Q 2 For example, to a state of minimum opening (as shown in fig. 3 and 5).
It should be noted that the water temperature in the inner container 11 is, for example, 42 ℃, and it is usually directly installed in an electric water heater, and cannot be modified by a user.
It should be further noted that the power-on state refers to a state in which the power-on button is pressed when the electric water heater is powered on, and at this time, the electric water heater starts to work; the standby state refers to a state that the electric water heater is powered on but the start button is not pressed, and the electric water heater does not work at the moment.
Referring to fig. 1 and 8, in an embodiment, the electric water heater further includes a heater 80 disposed on the body 10 and heating the water in the inner container 11, and an on-off switch 91. The heater 80 is electrically connected to a power bus 92 via an on-off switch 91. The power bus 92 is for electrical connection to a power supply. The controller 60 is electrically connected to the on-off switch 91, and the controller 60 is further configured to control the on-off switch 91 to be turned on or off according to the first water temperature and the preset water temperature of the inner container 11 when the electric water heater is in the on state.
It should be noted that the preset water temperature of the inner container 11 is a water temperature set by a user according to a requirement of the user, and the preset water temperature of the inner container 11 is usually set to 40 ℃ to 45 ℃, although other water temperatures may be used, and is not limited herein.
Specifically, when the electric water heater is in an on state, the method for controlling the on-off switch 91 to be turned on or off according to the first water temperature and the preset water temperature of the inner container 11 includes: when the first water temperature is greater than or equal to the preset water temperature of the inner container 11, the controller 60 controls the on-off switch 91 to be switched off, and at this time, the heater 80 stops heating due to the fact that the heater 80 is disconnected from the power bus 92; when the first water temperature is lower than the preset water temperature of the inner container 11, the controller 60 controls the on-off switch 91 to be switched on, at this time, the heater 80 is switched on due to the connection with the power bus 92, the heater 80 is heated, and the water temperature in the inner container 11 can be increased until the preset water temperature of the inner container 11 is reached.
In addition, in one embodiment, a temperature limiter is further disposed on the power bus 92, and when the temperature of the temperature limiter exceeds a standard, the power bus 92 is automatically disconnected, so that a good protection effect is achieved, and safety is high.
In addition, the power bus 92 is electrically connected to the controller 60 through the weak current module 93. The weak current module 93 can convert strong current input by the power bus 92 into weak current required by the controller 60, so that the controller 60 can work normally.
Referring to fig. 2-4, in one embodiment, the regulating water valve 40 includes a valve body 45 and a stepping motor 46 disposed on the valve body 45. The regulating valve core 44 is rotatably disposed on the valve body 45, the stepping motor 46 drives the regulating valve core 44 to rotate, and the stepping motor 46 is electrically connected to the controller 60. The regulating valve core 44 is provided with a first stopper 441 for blocking the cold water inlet end 41, and a second stopper 442 for blocking the hot water inlet end 42. When the adjusting valve core 44 drives the first stopper 441 and the second stopper 442 to rotate, the first water flow Q can be synchronously adjusted 1 Magnitude and second water flow Q 2 Size. Specifically, when the stepping motor 46 drives the regulating valve core 44 to rotate toward the direction B to the first limit position (refer to fig. 3 and 5), the second stopper 442 completely seals the hot water inlet end 42, and the second water flow Q 2 Is 0 degree of openingThe first stop 441 completely opens the cold water inlet end 41, and the first water flow Q 1 The opening degree of (2) is adjusted to be maximum; when the stepping motor 46 drives the regulating valve core 44 to rotate towards the direction a to the second limit position (refer to fig. 4 and 6), the second stopper 442 completely opens the hot water inlet end 42, and the second water flow Q is generated 2 The opening degree of the first stopper 441 is adjusted to be maximum, the cold water inlet end 41 is completely sealed by the first stopper 441, and the second water flow Q is discharged 1 Is adjusted to the minimum; when the stepping motor 46 drives the regulating valve core 44 to rotate to a position between the first limit position and the second limit position (see fig. 7), the second stopper 442 partially opens the hot water inlet end 42, the first stopper 441 partially opens the cold water inlet end 41, and the hot water inlet end 42 enters the hot water (the second water flow Q) in the valve body 45 2 ) Cold water (first water flow Q) entering the valve body 45 together with the cold water inlet end 41 1 ) Mix with each other and exit from the mixed water outlet end 43.
Referring to fig. 2, in one embodiment, a first gear 47 is installed on a rotating shaft of the stepping motor 46, an end of the regulating valve core 44 penetrates the valve body 45 and is installed with a second gear 48, and the first gear 47 and the second gear 48 are engaged with each other.
Referring to fig. 2 and 8, in one embodiment, the regulating valve 40 further includes a reset switch 49 disposed on the valve body 45, and the reset switch 49 is electrically connected to the controller 60. When the first stopper 441 completely blocks the cold water inlet end 41 or the second stopper 442 completely blocks the hot water inlet end 42, the reset switch 49 senses the rotational position of the adjustment valve spool 44 and resets the stepping motor 46. Specifically, when the first stopper 441 completely blocks the cold water inlet port 41 or the second stopper 442 completely blocks the hot water inlet port 42, the reset switch 49 and the second gear 48 contact each other and transmit a contact signal to the controller 60, and the controller 60 controls the stepper motor 46 to reset according to the contact signal. Thus, when the first stopper 441 completely blocks the cold water inlet end 41 or the second stopper 442 completely blocks the hot water inlet end 42, the reset switch 49 sends a signal indicating the rotation position of the adjusting valve core 44 to the controller 60, the controller 60 correspondingly controls the stepping motor 46 to stop working and reset, and after the stepping motor 46 resets, the adjusting valve core 4 can be controlled more precisely by controlling the stepping motor 464, thereby more accurately controlling the first water flow Q 1 Opening degree of and second water flow Q 2 The actual outlet water temperature (namely the third water temperature) is adjusted at a higher speed and can be accurately controlled.
Referring to fig. 8, in one embodiment, the electric water heater further includes a display module 94 and/or an operation module 95 disposed on the body 10. The display module 94 and the operation module 95 are electrically connected to the controller 60; the display module 94 is configured to display the first water temperature, the second water temperature, the third water temperature, and a preset outlet water temperature; the operation module 95 is used for adjusting the preset outlet water temperature.
Further, the display module 94 can be used for displaying the water temperature in the inner container 11 and the preset water temperature of the inner container 11, and can also display the total water flow Q of the electric water heater. In addition, the operation module 95 can be used to adjust the preset water temperature of the inner container 11. Specifically, the display module 94 and the operation module 95 are specifically disposed in the touch screen, for example, or may be disposed separately according to actual requirements, and are not limited herein.
Further, the first temperature sensor 51 is specifically provided in the inner container 11. The second temperature sensor 52 is specifically disposed on the cold water inlet end 41 or the cold water supply pipe 70. A third temperature sensor 53 is specifically provided on the mixed water outlet end 43.
In the infringement comparison, the "cold water supply pipe 70" may be a part of the "regulating water valve 40", that is, the "cold water supply pipe 70" and the "other part of the regulating water valve 40" are integrally manufactured; or a separate member which is separable from the other part of the "regulating water valve 40", that is, the "cold water supply pipe 70" may be separately manufactured and then integrated with the other part of the "regulating water valve 40". In one embodiment, as shown in fig. 2, the "cold water supply pipe 70" is a part of the "regulating water valve 40" which is integrally formed.
Referring to fig. 1 to 4 again, in an embodiment, an operation method of an electric water heater includes the following steps:
when the electric water heater is in a starting state and a water valve of the electric water heater is not opened, acquiring a first water temperature inside the liner 11 and a second water temperature of the cold water inlet end 41, and pre-adjusting a water adjusting valve 40 of the electric water heater according to the first water temperature, the second water temperature and a preset water outlet temperature of the mixed water outlet end 43;
when the electric water heater is in a power-on state and a water valve of the electric water heater is opened, a first water temperature in the inner container 11, a second water temperature at the cold water inlet end 41 and a third water temperature at the mixed water outlet end 43 are obtained, and the water regulating valve 40 is finely adjusted according to the first water temperature, the second water temperature and the third water temperature so that the third water temperature is consistent with a preset outlet water temperature.
According to the working method of the electric water heater, after the electric water heater is started, the water-saving valve 40 is preset when the water-using valve of the electric water heater is not opened, so that the bad phenomenon that a user is scalded due to overhigh temperature of hot water flowing out from the mixed water outlet end 43 at the moment of opening the water-using valve can be avoided, and in addition, the actual outlet water temperature (namely the third water temperature) is regulated at a high speed and can be accurately controlled.
Further, when the electric water heater is in a standby state, a first water temperature inside the inner container 11 is obtained, and the water-saving adjusting valve 40 is adjusted according to the first water temperature and the water temperature inside the inner container 11. Thus, when the water heater is in a standby state, the controller 60 can adjust the water-adjusting valve 40 according to the first water temperature and the water temperature in the inner container 11, so that the bad phenomenon that a user is scalded due to opening the water-using valve in the standby state can be avoided. Specifically, when the electric water heater is in a standby state, the method for adjusting the water adjusting valve 40 according to the first water temperature and the water temperature in the inner container 11 includes: when the first water temperature is lower than the water temperature in the inner container 11, the controller 60 controls the water regulating valve 40 to operate at the second water flow Q 2 For example, a state of adjusting to the maximum opening degree; when the first water temperature is higher than the water temperature in the inner container 11, the controller 60 controls the water regulating valve 40 to operate at the second water flow Q 2 For example, a state of being adjusted to a minimum opening degree. In addition, it should be noted that the water temperature in the inner container 11 is, for example, 42 ℃, and it is usually directly installed in an electric water heater, and cannot be modified by a user.
In one embodiment, when the electric water heater is in the on state, a first water temperature inside the inner container 11 is obtained, and the on-off switch 91 of the heater 80 for connecting to the power bus 92 is controlled to be turned on or off according to the first water temperature and a preset water temperature of the inner container 11. Therefore, after the electric water heater is started, the first water temperature in the inner container 11 can be controlled to be the preset water temperature of the inner container 11. Specifically, when the electric water heater is in an on state, the method for controlling the on-off switch 91 to be turned on or off according to the first water temperature and the preset water temperature of the inner container 11 includes: when the first water temperature is greater than or equal to the preset water temperature of the inner container 11, the controller 60 controls the on-off switch 91 to be switched off, and at this time, the heater 80 stops heating due to the fact that the heater 80 is disconnected from the power bus 92; when the first water temperature is lower than the preset water temperature of the inner container 11, the controller 60 controls the on-off switch 91 to be switched on, and at this time, the heater 80 is switched on due to the connection with the power bus 92, so that the heater 80 is heated to work, and the water temperature in the inner container 11 can be increased until the preset water temperature of the inner container 11 is reached.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (10)
1. An electric water heater, characterized in that it comprises:
the water storage device comprises a body (10), wherein the body (10) is provided with an inner container (11) for storing water;
the hot water outlet pipe (20) and the cold water inlet pipe (30) are both arranged on the liner (11) and communicated with the liner (11);
the water regulating valve (40) is provided with a cold water inlet end (41), a hot water inlet end (42), a mixed water outlet end (43) and a regulating valve core (44), the cold water inlet end (41) and the cold water inlet pipe (30) are communicated with a cold water supply pipe (70), the hot water inlet end (42) is communicated with the hot water outlet pipe (20), and the regulating valve core (44) can regulate a first water flow Q of the water flow in the cold water inlet end (41) flowing into the mixed water outlet end (43) 1 And a second flow Q of water from the hot water inlet end (42) to the mixed water outlet end (43) can be regulated 2 ；
A first temperature sensor (51), a second temperature sensor (52) and a third temperature sensor (53), wherein the first temperature sensor (51) is used for detecting a first water temperature inside the inner container (11), the second temperature sensor (52) is used for detecting a second water temperature of the cold water inlet end (41), and the third temperature sensor (53) is used for detecting a third water temperature of the mixed water outlet end (43);
the controller (60) is electrically connected with the first temperature sensor (51), the second temperature sensor (52), the third temperature sensor (53) and the water regulating valve (40) respectively; the controller (60) is used for presetting the water regulating valve (40) according to the first water temperature, the second water temperature and the preset outlet water temperature of the mixed water outlet end (43) when the electric water heater is in a starting state and a water using valve of the electric water heater is not opened; the controller (60) is further configured to, when the electric water heater is in a power-on state and a water use valve of the electric water heater is opened, finely adjust the water adjustment valve (40) according to the first water temperature, the second water temperature, and the third water temperature so that the third water temperature corresponds to the preset outlet water temperature.
2. The electric water heater according to claim 1, wherein the controller (60) is further configured to adjust the water adjusting valve (40) according to the first water temperature and the water temperature in the inner container (11) when the electric water heater is in a standby state.
3. The electric water heater according to claim 1, further comprising a heater (80) disposed on the body (10) for heating water in the inner container (11), and an on-off switch (91), wherein the heater (80) is electrically connected to a power bus (92) through the on-off switch (91); the power bus (92) is for electrical connection to a power supply device; the controller (60) is electrically connected with the on-off switch (91), and the controller (60) is also used for controlling the on-off switch (91) to be switched on or switched off according to the first water temperature and the preset water temperature of the inner container (11) when the electric water heater is in a power-on state.
4. The electric water heater according to claim 1, characterized in that the regulating water valve (40) comprises a valve body (45), a stepping motor (46) arranged on the valve body (45); the adjusting valve core (44) is rotationally arranged on the valve body (45), the stepping motor (46) drives the adjusting valve core (44) to rotate, and the stepping motor (46) is electrically connected with the controller (60); the adjusting valve core (44) is provided with a plug for pluggingA first block (441) for blocking the cold water inlet end (41), and a second block (442) for blocking the hot water inlet end (42); when the adjusting valve core (44) drives the first stop block (441) and the second stop block (442) to rotate, the first water flow Q can be synchronously adjusted 1 Magnitude and second water flow Q 2 Size.
5. The electric water heater according to claim 4, characterized in that a first gear (47) is arranged on a rotating shaft of the stepping motor (46), an end part of the regulating valve core (44) penetrates through the valve body (45) and is provided with a second gear (48), and the first gear (47) and the second gear (48) are meshed with each other.
6. The electric water heater according to claim 4, characterized in that the regulating water valve (40) further comprises a reset switch (49) arranged on the valve body (45), wherein the reset switch (49) is electrically connected with the controller (60); when the first stopper (441) completely blocks the cold water inlet end (41) or the second stopper (442) completely blocks the hot water inlet end (42), the reset switch (49) can sense the rotation position of the regulating valve core (44) and is used for resetting the stepping motor (46).
7. The electric water heater according to claim 1, further comprising a display module (94) and/or an operating module (95) provided on the body (10); the display module (94) and the operation module (95) are electrically connected with the controller (60); the display module (94) is used for displaying the first water temperature, the second water temperature, the third water temperature and the preset outlet water temperature; the operation module (95) is used for adjusting the preset outlet water temperature.
8. The working method of the electric water heater is characterized by comprising the following steps:
when the electric water heater is in a starting state and a water valve of the electric water heater is not opened, acquiring a first water temperature inside the liner (11) and a second water temperature of a cold water inlet end (41), and presetting a water regulating valve (40) of the electric water heater according to the first water temperature, the second water temperature and a preset water outlet temperature of a mixed water outlet end (43);
when the electric water heater is in a starting state and a water valve of the electric water heater is opened, a first water temperature in the inner container (11), a second water temperature at a cold water inlet end (41) and a third water temperature at a mixed water outlet end (43) are obtained, and the water regulating valve (40) is finely adjusted according to the first water temperature, the second water temperature and the third water temperature so that the third water temperature is in accordance with the preset outlet water temperature.
9. The working method of the electric water heater according to claim 8, wherein when the electric water heater is in a standby state, a first water temperature inside the inner container (11) is obtained, and the water regulating valve (40) is regulated according to the first water temperature and the water temperature inside the inner container (11).
10. The working method of the electric water heater according to claim 8, wherein when the electric water heater is in the on state, a first water temperature inside the inner container (11) is obtained, and the on-off switch (91) of the heater (80) for connecting to the power bus (92) is controlled to be switched on or off according to the first water temperature and the preset water temperature of the inner container (11).
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| CN202110440162.7A CN115218478B (en) | 2021-04-21 | 2021-04-21 | Electric water heater and working method thereof |
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| CN202110440162.7A CN115218478B (en) | 2021-04-21 | 2021-04-21 | Electric water heater and working method thereof |
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