CN112303918A - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN112303918A CN112303918A CN201910687694.3A CN201910687694A CN112303918A CN 112303918 A CN112303918 A CN 112303918A CN 201910687694 A CN201910687694 A CN 201910687694A CN 112303918 A CN112303918 A CN 112303918A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- 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
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a water heater and a control method thereof, wherein the water heater comprises a water heater body and a heating module for increasing water yield, the water heater body comprises a water circulation pipeline and a heat pump component for heating water in the water circulation pipeline, the heating module comprises a heater, a first temperature sensing part for detecting the water temperature before the heater is heated, a second temperature sensing part for detecting the water temperature after the heater is heated and a controller for controlling the heater, and the first temperature sensing part, the heater and the second temperature sensing part are sequentially arranged in the water circulation pipeline along the water flow direction. According to the water heater and the control method thereof, whether the heater needs to be started or not is judged by acquiring the temperature of the first temperature sensing part and comparing the temperature with the first preset temperature, and whether the output power of the heater needs to be adjusted or not is judged by acquiring the temperature of the second temperature sensing part and comparing the temperature with the second preset temperature, so that the water yield is dynamically adjusted.
Description
Technical Field
The invention belongs to the technical field of heat exchange, and particularly relates to a water heater and a control method thereof.
Background
Water heaters are common in daily life, and in order to ensure the comfort of users when using hot water, the outlet water temperature of the water heater is usually kept unchanged. However, when the inlet water temperature of the water heater is low, the time required for heating the cold water is long, resulting in a decrease in the amount of water discharged per unit time. For example, when the water heater stores heat by using the phase-change material, in unit time, the larger the volume of the phase-change material is, the larger the volume of the water heater is, and the more the water yield is; the smaller the volume of the phase-change material, the smaller the volume of the water heater, and the lower the water yield. When the temperature of the inlet water is lower, the two characteristics of large water outlet quantity and small volume of the water heater cannot be obtained simultaneously.
Disclosure of Invention
The invention aims to provide a water heater, which solves the technical problems that the water yield is high, the volume is small and exquisite and the water heater cannot be obtained simultaneously in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a water heater, includes the water heater body and is used for increasing the heating module of water yield, the water heater body includes water circulation pipeline and is used for heating the heat pump subassembly of the water in the water circulation pipeline, the heating module includes the heater, is used for detecting the first temperature sensing portion of the temperature before the heater heating, is used for detecting the process the second temperature sensing portion of the temperature after the heater heating and is used for controlling the controller of heater, first temperature sensing portion the heater reaches second temperature sensing portion locates in proper order along the rivers direction water circulation pipeline.
Furthermore, a water flow sensor for detecting a water flow signal is arranged at a water outlet of the water circulation pipeline.
Further, the first temperature sensing part, the heater and the second temperature sensing part are arranged at a water inlet of the water circulation pipeline, a pipeline middle section of the water circulation pipeline or a water outlet of the water circulation pipeline.
Further, the heater is an electric heater or an electromagnetic heater.
Further, the water heater body still includes aircraft nose and water tank, the hydrologic cycle pipeline is located in the water tank, heat pump assembly is including locating compressor and evaporimeter in the aircraft nose and locating condensation heat exchanger in the water tank, condensation heat exchanger's intake pipe with the compressor intercommunication, condensation heat exchanger's drain pipe with the evaporimeter intercommunication.
Furthermore, the condensation heat exchanger and the water circulation pipeline are both arranged in a snake shape, and the condensation heat exchanger and the water circulation pipeline are arranged in a crossed mode.
Further, the condensing heat exchanger and the water circulation pipeline are both tube-fin heat exchangers.
Further, an inner container is further arranged in the water tank, a heat insulation layer is further filled between the water tank and the inner container, the condensation heat exchanger and the water circulation pipeline are both arranged inside the inner container, and a heat storage material is further filled inside the inner container.
Further, the controller is arranged inside the handpiece.
The invention also provides a control method of the water heater, which is applied to the water heater and comprises the following steps:
acquiring a water flow signal at a water outlet of the water circulation pipeline, judging whether water flows through the water outlet of the water circulation pipeline, and acquiring the water temperature T at the first temperature sensing part if the water flows through the water outlet of the water circulation pipeline1；
Judgment of T1Whether a first preset condition is met or not is judged, and if yes, the heater is started;
obtaining the water temperature T at the second temperature sensing part2And determining T2And if the second preset condition is met, maintaining or reducing the output power of the heater, otherwise, increasing the output power of the heater.
Further, T is judged1Whether the first preset condition is met comprises the following steps: comparison T1And a first preset temperature T of the water heater10Size of (c), if T1<T10Then T is1Satisfy the first predetermined condition if T1≥T10Then T is1The first preset condition is not satisfied.
Further, the determining whether T2 satisfies the second preset condition includes: comparison T2And a second preset temperature T of the water heater20Size of (c), if T2≥T20Then T is2Satisfy the second preset condition if T2<T20Then T is2The second preset condition is not satisfied.
Further, after the heater is started, the heating time T is set, and the water temperature T at the second temperature sensing part is acquired after the heater operation time T2。
Further, when the output power of the heater is increased, the heater power is increased by a percentage of (T)10-T1)/T10。
Further, a water flow signal is obtained through a Hall water flow sensor.
The water heater and the control method thereof provided by the embodiment of the invention have the beneficial effects that: the water heater provided by the embodiment of the invention comprises a water heater body and a heating module, wherein the heating module is used for increasing the water yield. The heating module comprises a heater, a first temperature sensing part, a second temperature sensing part and a controller, the first temperature sensing part, the heater and the second temperature sensing part are sequentially arranged on the water circulation pipeline controller along the water flow direction, the heater is judged whether to be started or not by acquiring the temperature of the first temperature sensing part and comparing the temperature with the first preset temperature, the output power of the heater is judged whether to be adjusted or not by acquiring the temperature of the second temperature sensing part and comparing the temperature with the second preset temperature, and therefore the dynamic regulation of the water yield is realized. Even the volume of water heater is less, and the heat accumulation volume is certain, when the temperature of intaking is lower, also can guarantee great water yield, improves the comfort level that the user used.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described 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 inventive exercise.
Fig. 1 is a schematic structural diagram of a first water heater provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a second water heater according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a heat pump assembly provided by an embodiment of the present invention;
fig. 4 is a schematic flow chart of a control method of a water heater according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a water heater body; 11-a machine head; 12-a water tank; 13-a heat-insulating layer; 14-inner container; 15-a heat storage material; 16-a heat pump assembly; 161-a compressor; 162-an evaporator; 163-condensing heat exchanger; 164-a fan; 165-an expansion valve; 166-a filter; 167-a liquid reservoir; 17-a water circulation line; 171-a water inlet; 172-water outlet; 173-water flow sensor; 2-heating the module; 21-a first temperature sensing part; 22-a heater; 23-a second temperature sensing part.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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 be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting 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 implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 and 2, a water heater according to an embodiment of the present invention will now be described. In one embodiment, the water heater comprises a water heater body 1 and a heating module 2, wherein the heating module 2 is used for increasing the water yield, so that a larger water yield is ensured under the condition that the inlet water temperature is lower, and a user can use the water heater normally. The water heater body 1 comprises a water circulation pipeline 17 and a heat pump assembly 16, the heat pump assembly 16 is used for heating water in the water circulation pipeline 17 during normal operation, the water circulation pipeline 17 is provided with a water inlet 171 and a water outlet 172, normal temperature water enters the water circulation pipeline 17 from the water inlet 171, after being heated by the heat pump assembly 16, the water temperature rises to be hot water, and the hot water flows out from the water outlet 172. The heating module 2 includes a heater 22, a first temperature sensing part 21, a second temperature sensing part 23, and a controller. The first temperature sensing unit 21, the heater 22 and the second temperature sensing unit 23 are sequentially provided in the water circulation line 17, and are arranged in the same direction as the water flow direction, the first temperature sensing unit 21 is used for detecting the temperature before the heater 22 is heated, and the second temperature sensing unit 23 is used for detecting the temperature after the heater 22 is heated. The controller is electrically connected to both the first temperature sensing unit 21 and the second temperature sensing unit 23, and controls the switching and output of the heater 22 according to the temperatures detected by the first temperature sensing unit 21 and the second temperature sensing unit 23. When the water yield needs to be increased, the heating module 2 can provide additional energy, so that the water yield at the rated temperature in unit time is increased. Specifically, when the temperature of the inlet water is low, the temperature of the water detected by the first temperature sensing part 21 is lower than a first preset temperature, the controller controls the heater 22 to be turned on, the water passing through the heater 22 is heated, after a preset time, the temperature of the water at the second temperature sensing part 23 is constant, when the temperature of the water detected by the second temperature sensing part 23 is greater than or equal to a second preset temperature, the output power of the heater 22 is kept or reduced, and when the temperature of the water detected by the second temperature sensing part 23 is less than the preset temperature, the output power of the heater 22 is increased, so that the water outlet amount in a unit time can be ensured to be sufficient.
In the water heater in the above embodiment, the first temperature sensing part 21, the heater 22 and the second temperature sensing part 23 are sequentially disposed on the water circulation pipeline 17 along the water flow direction, and by acquiring the temperature of the first temperature sensing part 21 and comparing with the first preset temperature, it is determined whether the heater 22 needs to be started, and by acquiring the temperature of the second temperature sensing part 23 and comparing with the second preset temperature, it is determined whether the output power of the heater 22 needs to be adjusted, thereby implementing dynamic adjustment of the water yield. Even the volume of water heater is less, and the heat accumulation volume is certain, when the temperature of intaking is lower, also can guarantee great water yield, improves the comfort level that the user used.
Referring to fig. 1 and 2, in one embodiment, a water flow sensor 173 is disposed at an outlet of the water circulation pipeline 17, and the water flow sensor 173 is used for detecting whether water flows through the water outlet 172, so as to determine whether a user is using water. If the user uses water, the water flow sensor 173 transmits a detected water flow signal to the controller, and the controller controls the first temperature sensing part 21 to detect the temperature of the water flowing through the first temperature sensing part 21, and compares the detected water temperature with a first preset temperature: if the detected water temperature is greater than or equal to the first preset temperature, the heater 22 maintains a standby state; if the detected water temperature is lower than the first preset temperature, the heater 22 is turned on to heat the water in the water circulation line 17.
Optionally, the water flow sensor 173 is a hall water flow sensor, the hall water flow sensor is electrically connected to the controller, a hall switch and an impeller are arranged in the hall water flow sensor, when water flows, the impeller is pushed to rotate by water flow, a group of signals are transmitted to the hall switch when the impeller rotates for one circle, the hall switch outputs a corresponding pulse signal, the hall switch outputs a pulse signal to the controller when the impeller rotates for one circle, the faster the water flow is, the faster the rotation speed of the impeller is, and the higher the output frequency of the pulse signal is. The controller judges whether the user uses water according to the frequency of the acquired pulse signal: when the controller does not acquire the pulse signals or the interval time between the pulse signals is too long (for example, exceeds 1s), the user does not use water, and the heater 22 is kept in a standby state; when the controller acquires a pulse signal which is stably input and has a short interval time (for example, less than 1s), when the user uses water, the controller controls the first temperature sensing part 21 to detect the temperature of the water flowing through the first temperature sensing part 21, and compares the detected temperature of the water with a first preset temperature.
Referring to fig. 1, in one embodiment, the first temperature sensing part 21, the heater 22 and the second temperature sensing part 23 are all disposed at the water inlet 171 of the water circulation pipeline 17, and the heater 22 can preheat the water flow before entering the water circulation pipeline 17. In this embodiment, when the temperature of the water inlet 171 of the water circulation line 17 is low, the value detected by the first temperature sensing unit 21 is compared with a first preset temperature, thereby determining whether the heater 22 needs to be activated. The first preset temperature is set based on the temperature of the water at the water inlet 171 (at the water inlet temperature, when the heater 22 is not turned on, the temperature of the water flowing out from the water outlet 172 is available for the user to use). For example, without the heater 22, the inlet water temperature is TIntoThe water yield per unit time is QForehead (forehead)(constant temperature of effluent), QForehead (forehead)The first preset temperature is T to satisfy the minimum water yield of the user in unit timeIntoThe water temperature value detected by the first temperature sensing part 21 is less than TIntoWhen so, the controller activates the heater 22.
Referring to fig. 2, in one embodiment, the first temperature sensing part 21, the heater 22 and the second temperature sensing part 23 are all disposed at the water outlet 172 of the water circulation pipeline 17, and the heater 22 can preheat the water before the water flows out of the water circulation pipeline 17. In this embodiment, when the temperature of the water outlet 172 of the water circulation line 17 is low, the value detected by the first temperature sensing unit 21 is compared with a first preset temperature, so as to determine whether the heater 22 needs to be activated. Wherein the first predetermined temperature is set to be the water temperature of the water outlet 172 (b)I.e., the temperature of water that the user can normally use) as a reference. For example, without the heater 22, the leaving water temperature is TGo outThe water yield per unit time is QForehead (forehead)(constant temperature of effluent), QForehead (forehead)The preset temperature is T to meet the minimum water yield of the user in unit timeGo outThe water temperature value detected by the first temperature sensing part 21 is less than TGo outWhen so, the controller activates the heater 22.
In another embodiment, the first temperature sensing part 21, the heater 22 and the second temperature sensing part 23 may be disposed at the middle of the water circulation pipeline 17. In this embodiment, the first predetermined temperature is selected according to the temperature value reached by the first temperature sensing part 21 when only the heat pump assembly 16 is used to heat water.
Alternatively, the heater 22 is an electric heater that rapidly heats the flow of water passing through the electric heater; the heater 22 can also be an electromagnetic heater, and is not required to be in direct contact with water in the water circulation pipeline 17, so that water and electricity are separated, and the installation performance of the water heater is ensured when the water heater is used.
In one embodiment, the first temperature sensing part 21 and the second temperature sensing part 23 are both temperature sensing bulbs. The temperature sensing bulb comprises a capillary tube, a corrugated tube, a spring, a rheostat, a control loop and the like. The capillary tube and the corrugated tube are positioned in the water circulation pipeline 17, and the capillary tube and the corrugated tube are filled with temperature sensing agents. When the water temperature rises gradually, the temperature sensing agent is gasified and expanded gradually, so that the corrugated pipe pushes the spring, the spring pushes the sliding block on the rheostat, the current in the control loop is changed, and the water temperature in the water circulation pipeline 17 is calculated according to the current signal. In another embodiment, the first temperature sensing unit 21 and the second temperature sensing unit 23 are both temperature sensors, and a thermistor is provided in each temperature sensor, and the resistance value of the thermistor changes with the change of temperature, so that the temperature of water in the water circulation pipeline 17 can be obtained.
In one embodiment, referring to fig. 1, 2 and 3, the water heater body 1 further includes a machine head 11 and a water tank 12, the water circulation pipeline 17 is disposed in the water tank 12, the heat pump assembly 16 includes a compressor 161, an evaporator 162 and a condensing heat exchanger 163, the compressor 161 and the evaporator 162 are disposed in the machine head 11, the condensing heat exchanger 163 needs to exchange heat with the water circulation pipeline 17, and therefore the condensing heat exchanger 163 is disposed in the water tank 12. The water circulation pipeline 17, the compressor 161, the evaporator 162 and the like are separately arranged, so that safety accidents are prevented from occurring when the water circulation pipeline 17 leaks water, and the safety performance of the water heater is improved.
Optionally, the controller of the heating module 2 is disposed in the machine head 11 and is separated from the water circulation pipeline 17, so that the controller is conveniently integrated in the control board of the heat pump assembly 16, and the safety performance of the water heater can also be improved.
More specifically, the water tank 12 is provided with a water inlet 171 and a water outlet 172 of the water circulation pipeline 17, the water inlet 171 is connected with a tap water system, and the water outlet 172 is connected with a water outlet device such as a spray head or a faucet for use by a user. When the first temperature sensing part 21, the heater 22 and the second temperature sensing part 23 are provided at the water inlet 171 or the water outlet 172, they may be provided inside or outside the water tank 12, and are not limited herein.
More specifically, the water tank 12 is further provided with an air inlet of the condensing heat exchanger 163 and an air outlet of the condensing heat exchanger 163, an air inlet of the condensing heat exchanger 163 is connected to an air outlet of the compressor 161 through the air inlet, and an air outlet of the condensing heat exchanger 163 is connected to the evaporator 162 through the air outlet. The heat pump assembly 16 further includes a liquid storage tank 167, a filter 166, and an expansion valve 165, which are connected in sequence between the condensing heat exchanger 163 and the evaporator 162, and a fan 164 provided at the evaporator 162. When the heat pump assembly 16 works to heat water in the water circulation pipeline 17, the fan 164 keeps running, outdoor air exchanges heat with the evaporator 162, working medium inside the evaporator 162 absorbs heat and is evaporated to be sucked into the compressor 161, meanwhile, air with reduced temperature is exhausted out of the system by the fan 164, the compressor 161 compresses the low-pressure working medium gas into high-temperature and high-pressure gas to be sent into the condensing heat exchanger 163, the working medium inside the condensing heat exchanger 163 exchanges heat with the water in the water circulation pipeline 17, heating of the water is achieved in this way, the working medium is cooled into liquid, the liquid flows into the evaporator 162 again after being throttled and cooled by the expansion valve 164, circulation is repeated in this way, heat energy in the air is continuously converted into the water, and the water temperature in the water tank 12 is gradually increased to an appropriate temperature for a user to use.
In one embodiment, the condensing heat exchanger 163 and the water circulation pipeline 17 are arranged in a serpentine shape to increase the pipeline length in a fixed area, and also to enable the heat exchange between the condensing heat exchanger 163 and the water circulation pipeline 17 to be more sufficient. Furthermore, the condensing heat exchanger 163 and the water circulation pipeline 17 are arranged in a crossed manner, so that the condensing heat exchanger 163 and the water circulation pipeline 17 are contacted more fully, and the heat exchange effect is enhanced to a greater extent.
Optionally, the pipeline extending direction of the condensing heat exchanger 163 is an X direction, the extending direction of the water circulation pipeline 17 is a Y direction, and the X direction and the Y direction are vertically arranged or arranged in an acute angle or an obtuse angle, so that the water circulation pipeline 17 and the condensing heat exchanger 163 are in full contact, and the heat exchange is more uniform. The X direction and the Y direction may also be the same, so that the water circulation pipeline 17 and the condensing heat exchanger 163 have the same pipeline direction, and each section of the two pipelines is closely attached to ensure the heat exchange effect.
Optionally, both the condensing heat exchanger 163 and the water circulation line 17 are tube and fin heat exchangers. The tube-fin heat exchanger has compact structure, occupies smaller space compared with other types of heat exchangers, is usually pressed by stainless steel or titanium alloy plates, can resist various corrosive media, has longer service life, and is easy to clean and disassemble.
In one embodiment, an inner container 14 is further disposed in the water tank 12, an insulating layer 13 is filled between the inner container 14 and the water tank 12, and the condensing heat exchanger 163 and the water circulation pipeline 17 are both disposed in the insulating layer 13 to prevent heat in the insulating layer 13 from exchanging heat with outside air, so as to prevent heat loss. The insulating layer 13 includes, but is not limited to, an insulating foam material, and the insulating layer 13 may also be a vacuum layer, etc. The condensation heat exchanger 163 and the water circulation pipeline 17 are both arranged inside the inner container 14, the heat storage material 15 is filled inside the inner container 14, the heat of the condensation heat exchanger 163 can be transmitted to the heat storage material 15, the heat storage material 15 stores the heat and transmits the heat to the water circulation pipeline 17, and the temperature of the water in the water circulation pipeline 17 is increased. The heat storage material 15 has a fixed volume and shape, and can store a constant amount of heat, and when the volume of the water tank 12 of the water heater is larger, the larger the volume of the heat storage material 15 is, the more heat can be stored. The heat storage material 15 can be selected as a phase change material, and the phase change Cali has the characteristic of strong heat storage capacity, so that the volume of the water tank 12 can be effectively reduced.
Referring to fig. 4, the present invention further provides an embodiment of a control method of a water heater, which is applied to the water heater in any of the above embodiments. The control method of the water heater comprises the following steps:
s10: acquiring a water flow signal at the water outlet 172 of the water circulation pipeline 17, judging whether water flows through the water outlet 172 of the water circulation pipeline 17 or not, and acquiring the water temperature T at the first temperature sensing part 21 if the water flows through the water outlet 172 of the water circulation pipeline 171；
S20: judgment of T1Whether a first preset condition is met, if yes, the heater 22 is started;
s30: the water temperature T at the second temperature sensing part 23 is obtained2And determining T2If the second preset condition is satisfied, the output power of the heater 22 is maintained or reduced if the second preset condition is satisfied, otherwise, the output power of the heater 22 is increased.
When the user uses the water heater, the water outlet 172 of the water circulation pipeline 17 is continuously passed through, the controller controls the first temperature sensing part 21 to detect the temperature of the water passing through the first temperature sensing part 21, if the temperature T detected by the first temperature sensing part 21 is not lower than the preset temperature T1When a first preset condition is satisfied, the heater 22 is activated, and if the water temperature T detected by the first temperature sensing part 21 is higher than a predetermined value1When the first preset condition is not satisfied, the heater 22 is kept in a standby state without supplying additional heat to the water in the water circulation line 17. The temperature T of the water detected by the first temperature sensing part 211When the first preset condition is satisfied, the water temperature T detected by the second temperature sensing part 23 is obtained after the heater 22 is started2If T is2If the second preset condition is satisfied, the output power of the heater 22 is maintained or decreased, otherwise, the output power of the heater 22 is increased. The output power of the heater 22 is dynamically adjusted by detecting the temperature of the first temperature sensing part 21 and the second temperature sensing part 23, so as to realize the adjustment of the water yield of the water heater.
In one embodiment, specifically in S10, the water flow signal is obtained by a hall water flow sensor, and the hall water flow sensor converts the water flow signal into a current signal after obtaining the water flow signal and transmits the current signal to the controller. The Hall water flow sensor is internally provided with a Hall switch and an impeller, when water flows, the impeller is pushed to rotate by the water flow, a group of signals are transmitted to the Hall switch when the impeller rotates one circle, the Hall switch outputs corresponding pulse signals, the Hall switch outputs one pulse signal to the controller when the impeller rotates one circle, the faster the water flow is, the faster the rotating speed of the impeller is, and the higher the output frequency of the pulse signals is.
In one embodiment, specifically in S10, the controller determines whether the user is using water according to the acquired current signal (pulse signal) of the hall water flow sensor. For example, if the controller does not acquire the pulse signal or the interval time between the pulse signals is too long (e.g., exceeds 1s), the user does not use water, and the heater 22 remains in the standby state; when the controller acquires a pulse signal (fig. less than 1s) with a stable input and a short interval time, the user uses water, and the controller controls the first temperature sensing part 21 to detect the temperature T of the water flowing through the first temperature sensing part 211And determining T1Whether the first preset condition is met.
In one embodiment, specifically in S20, T is compared1And a first preset temperature T of the water heater10The size of (2): if T1<T10If the temperature of the inlet water in the water circulation pipeline 17 is too low, the heat generated by the heat pump module 16 cannot meet the preset water output, T1Meeting a first preset condition; if T1≥T10It means that the temperature of the inlet water in the water circulation pipeline 17 is high, and the heat generated by the heat pump module 16 is enough to satisfy the preset outlet water amount under the condition that the outlet water temperature is ensured.
In one embodiment, specifically, after the heater 22 is activated in S20, a heating time T is set, and after the heating time T elapses, the water flow temperature T2 of the second temperature sensing unit 23 is acquired. If the temperature of the water flow at the second temperature sensing part 23 is obtained immediately after the heater 22 is started, the heater 22 cannot heat the water flow uniformly, the temperature detected by the second temperature sensing part 23 is inaccurate, and after the heating time t of the heater 22, the temperature of the water flow is stable, and the detection result of the second temperature sensing part 23 is more accurate. T is2And T10The larger the difference, the longer the heating time required. Specifically, the heating time T is proportional to the water flow output percentage, where the water flow output percentage k is (T ═ T)10-T1)/T10。
In one embodiment, specifically in S30, T is compared2And a second preset temperature T of the water heater20The size of (2): if T2≥T20The water temperature after being heated by the heater 22 is greater than or equal to T20，T2The second preset condition is met, that is, when the heat pump assembly 16 is in normal operation, the water yield at the rated water outlet temperature is greater than or equal to the preset water yield, and the current output power of the heater 22 is maintained or reduced; if T2<T20Then T is2The second predetermined condition is not satisfied, i.e., the heat pump assembly 16 is operating normally with less than a predetermined water output at the nominal water output temperature, in which case the output of the heater 22 is increased until T2≥T20In this case, the output of the heater 22 is maintained to ensure the water output. The first temperature sensing part 21 and the second temperature sensing part 23 both detect in real time to realize real-time dynamic adjustment of the water yield.
In one embodiment, particularly in S30, if T2If the second preset condition is not met, the output power of the heater needs to be increased, and T is detected after preset time or in real time2And repeating step S30 until T2The second preset condition is satisfied. More specifically, when T2When the second preset condition is not met, the output power of the heater needs to be increased, and the percentage of the power increase is (T)10-T1)/T10. For example, the initial output power of the heater is P, and the output power P is increased1＝P+P(T10-T1)/T10。
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (15)
1. The water heater, its characterized in that: including the water heater body and be used for increasing the heating module of water yield, the water heater body includes water circulation pipeline and is used for heating the heat pump subassembly of the water in the water circulation pipeline, the heating module includes the heater, is used for detecting the first temperature sensing portion of the temperature before the heater heating, is used for detecting the process the second temperature sensing portion of the temperature after the heater heating and is used for controlling the controller of heater, first temperature sensing portion the heater reaches the second temperature sensing portion is located in proper order along the rivers direction water circulation pipeline.
2. The water heater as recited in claim 1, wherein: and a water flow sensor for detecting a water flow signal is arranged at the water outlet of the water circulation pipeline.
3. The water heater as recited in claim 1, wherein: the first temperature sensing part, the heater and the second temperature sensing part are arranged at a water inlet of the water circulation pipeline, a pipeline middle section of the water circulation pipeline or a water outlet of the water circulation pipeline.
4. The water heater as recited in claim 1, wherein: the heater is an electric heater or an electromagnetic heater.
5. The water heater as recited in claim 1, wherein: the water heater body still includes aircraft nose and water tank, the hydrologic cycle pipeline is located in the water tank, heat pump assembly is including locating compressor and evaporimeter in the aircraft nose and locating condensation heat exchanger in the water tank, condensation heat exchanger's intake pipe with the compressor intercommunication, condensation heat exchanger's drain pipe with the evaporimeter intercommunication.
6. The water heater as recited in claim 5, wherein: the condensation heat exchanger with the water circulation pipeline all is snakelike setting, just the condensation heat exchanger with the water circulation pipeline sets up alternately.
7. The water heater as recited in claim 6, wherein: the condensing heat exchanger and the water circulation pipeline are both tube-fin heat exchangers.
8. The water heater as recited in claim 5, wherein: the water tank is internally provided with an inner container, a heat insulation layer is filled between the water tank and the inner container, the condensation heat exchanger and the water circulation pipeline are both arranged inside the inner container, and the inner container is also filled with a heat storage material.
9. The water heater as recited in claim 5, wherein: the controller is arranged inside the machine head.
10. A control method of a water heater applied to the water heater of any one of claims 1 to 9, characterized by comprising the following steps:
acquiring a water flow signal at a water outlet of the water circulation pipeline, judging whether water flows through the water outlet of the water circulation pipeline, and acquiring the water temperature T at the first temperature sensing part if the water flows through the water outlet of the water circulation pipeline1；
Judgment of T1Whether a first preset condition is met or not is judged, and if yes, the heater is started;
obtaining the water temperature T at the second temperature sensing part2And determining T2And if the second preset condition is met, maintaining or reducing the output power of the heater, otherwise, increasing the output power of the heater.
11. The control method of a water heater as claimed in claim 10, wherein T is judged1Whether the first preset condition is met comprises the following steps: comparison T1And a first preset temperature T of the water heater10Size of (c), if T1<T10Then T is1Satisfy the first predetermined condition if T1≥T10Then T is1The first preset condition is not satisfied.
12. The control method of the water heater as claimed in claim 10, wherein the judging whether T2 satisfies the second preset condition includes: comparison T2And a second preset temperature T of the water heater20Size of (c), if T2≥T20Then T is2Satisfy the second preset condition if T2<T20Then T is2The second preset condition is not satisfied.
13. The control method of a water heater as claimed in claim 11, wherein a heating time T is set after the heater is activated, and a water temperature T at the second temperature sensing part is obtained after a heater operation time T2。
14. The control method of a water heater as claimed in claim 13, wherein the percentage of increase in heater power when increasing the output power of the heater is (T)10-T1)/T10。
15. The method of controlling a water heater as claimed in claim 10, wherein the water flow signal is obtained by a hall water flow sensor.
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| CN201910687694.3A CN112303918A (en) | 2019-07-29 | 2019-07-29 | Water heater and control method thereof |
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| CN201910687694.3A CN112303918A (en) | 2019-07-29 | 2019-07-29 | Water heater and control method thereof |
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Application publication date: 20210202 |