CN107606780B - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN107606780B CN107606780B CN201711016392.0A CN201711016392A CN107606780B CN 107606780 B CN107606780 B CN 107606780B CN 201711016392 A CN201711016392 A CN 201711016392A CN 107606780 B CN107606780 B CN 107606780B
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Abstract
The invention discloses a water heater and a control method thereof, the water heater comprises a water tank, a water inlet pipe, a water outlet pipe, a flow sensor, a first temperature sensor, a second temperature sensor, a first electric heating pipe, a second electric heating pipe and a controller, wherein the water inlet pipe is provided with a water inlet positioned in the water tank, the water outlet pipe is provided with a water outlet positioned in the water tank and used for outputting hot water in the water tank, the first temperature sensor is used for detecting the water temperature at the water inlet, the first electric heating pipe is arranged at the water inlet, the second temperature sensor is used for detecting the water temperature in the water tank, the second electric heating pipe is arranged at the water outlet, the flow sensor is arranged on the water outlet pipe, and the first temperature sensor, the second temperature sensor, the first electric heating pipe, the second electric heating pipe and the flow sensor are all electrically connected with the controller. The invention can quickly heat the low-temperature cold water at the water inlet, and can realize quick output of hot water and instant hot washing function under the condition of lower temperature of tap water in winter.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a water heater and a control method thereof.
Background
In the existing electric water heater, an electric heating device is usually installed in the middle of an inner container of a water heater in a naked manner, an electric heating pipe heats stored water in the whole inner container, the water in the inner container is heated up integrally, and the water temperature rises slowly, so that the conventional electric water heater cannot achieve the effect of outputting hot water quickly. Also there are some water heaters that have the transient heat and wash function at present to push into market, and its transient heat washes the function and all has the great heating rod of power in addition near the delivery port, only heats the water that flows out, can improve the temperature of play water in the twinkling of an eye. However, this instantaneous hot washing function is generally implemented by ensuring that the temperature of the inlet water is higher than a predetermined value (for example, 25 ℃). For example, in summer, the water temperature is higher, and the temperature of the inlet water is generally between 20 ℃ and 30 ℃, so that the instant use can be realized, and in summer, the bathing does not need to be at a high temperature, and basically reaches 40 ℃. However, in winter, the temperature of tap water is 10-12 ℃, at this time, the water in the whole water tank needs to be preheated for a period of time to enable the temperature near the water outlet to reach a specific value (26 ℃), namely, the instant hot washing is started for a period of time, and the instant hot washing function loses the due function.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a water heater, which can rapidly output hot water in any season, greatly reduce the waiting time, and realize the instant hot washing function.
The second technical problem to be solved by the present invention is to provide a control method for a water heater, which can control the water heater to rapidly heat the low-temperature cold water at the water inlet, and can also achieve rapid hot water output and instant hot washing function under the condition of low tap water temperature in winter.
The first technical problem is solved by the following technical scheme:
the utility model provides a water heater, includes water tank, inlet tube, outlet pipe, flow sensor, first temperature sensor, second temperature sensor, first electric heating pipe, second electric heating pipe and controller, the inlet tube is equipped with and is located the water inlet in the water tank, the outlet pipe is equipped with and is located the delivery port that is used for hot water output in the water tank, first temperature sensor is used for detecting the temperature of water inlet department, first electric heating pipe is located water inlet department, second temperature sensor is used for detecting the temperature in the water tank, second electric heating pipe is located water outlet department, flow sensor locates on the outlet pipe, flow sensor first temperature sensor second temperature sensor first electric heating pipe and second electric heating pipe all with controller electric connection.
Compared with the background technology, the water heater provided by the embodiment of the invention has the following beneficial effects: a first electric heating pipe is arranged at a water inlet of the water heater, and a second electric heating pipe is arranged at a water outlet of the water heater. When the flow sensor detects that the flow rate of the water outlet pipe is high, namely when the user is indicated to be bathing, whether the first electric heating pipe needs to be started or not can be judged according to a first temperature detection value (namely the water inlet temperature) detected by the first temperature sensor. When the temperature of the inlet water is lower than a first preset temperature value (such as 25 ℃), the first electric heating pipe is started, so that the cold water at the water inlet can be heated instantly, the whole tank of water is heated at the same time, and otherwise, the first electric heating pipe is not required to be started. Meanwhile, whether the second electric heating pipe needs to be started or not is judged according to a second temperature detection value (namely the water temperature in the whole water tank) detected by the second temperature sensor. When the water temperature in the water tank is lower than a second preset temperature value (such as 40 ℃), the second electric heating pipe is started to ensure that the water temperature at the water outlet is quickly raised to meet the requirement of instantaneous bathing, otherwise, the second electric heating pipe is not required to be started. The first temperature sensor, the second temperature sensor, the first electric heating pipe, the second electric heating pipe and the flow sensor are all used for controlling corresponding actions according to logic through a controller, and therefore the rapid automatic heating function is achieved. Therefore, the low-temperature cold water at the water inlet can be quickly heated by the first electric heating pipe under the condition that the tap water temperature is lower in winter, so that the second electric heating pipe can heat the water to the bathing requirement in a short time. The invention can quickly output hot water in any season, greatly reduces the waiting time and realizes the instant hot washing function.
The above technical solution is further explained as follows:
in one embodiment, the photovoltaic heating device further comprises a photovoltaic heating pipe, the photovoltaic heating pipe is used for being connected with a photovoltaic power generation assembly, the photovoltaic heating pipe is arranged in the water tank, and the photovoltaic heating pipe is electrically connected with the controller. The controller can control the on-off of the photovoltaic power and the commercial power by detecting the photovoltaic voltage information of the photovoltaic power generation assembly, so that the intelligent complementation of the alternating current and the direct current is realized, and the commercial power is mainly used for the work of the first electric heating pipe and the second electric heating pipe. When photovoltaic voltage information reaches a voltage preset value (such as 8 VDC), the photovoltaic heating pipe can be connected to heat water in the water tank, the photovoltaic heating pipe can mainly play a role in preheating in the water tank and is used for storing sufficient hot water in advance, the sufficient supply of the hot water can be realized in time when the water is used, and the waiting is avoided. In one embodiment, the first electric heating tube is connected with a mains supply through a first relay, the second electric heating tube is connected with the mains supply through a second relay, the photovoltaic heating tube is connected with the photovoltaic power generation assembly through a third relay, and the first relay, the second relay and the third relay are all electrically connected with the controller. The controller only needs to control the first relay, the second relay and the third relay to respectively control the electrification and the outage of the first electric heating pipe, the second electric heating pipe and the photovoltaic heating pipe, and the first relay, the second relay and the third relay are arranged to enable the first electric heating pipe, the second electric heating pipe and the photovoltaic heating pipe to be controlled more conveniently and accurately.
In one embodiment, the first electric heating pipe and the second electric heating pipe are both of an annular structure, the first electric heating pipe is sleeved on the water inlet pipe and is arranged near the water inlet, and the second electric heating pipe is sleeved on the water outlet pipe and is arranged near the water outlet. The first electric heating pipe and the second electric heating pipe which are of annular structures are respectively used for heating water at the water inlet and the water outlet in a short time, so that the water temperature can reach the requirement instantly and quickly.
In one embodiment, the water tank further comprises a magnesium rod arranged in the water tank, the water tank is provided with a sewage discharge outlet, the magnesium rod is arranged close to the sewage discharge outlet, the inner container of the water tank can be prevented from being corroded, and the service life of the inner container is prolonged.
In one embodiment, the water tank is provided with a first inlet and outlet through which the water inlet pipe extends and a second inlet and outlet through which the water outlet pipe extends, and the first inlet and outlet and the second inlet and outlet are both provided with electricity-proof walls. The electricity-proof wall can prevent the electric leakage possibly generated by the water heater, and can also prevent the safety threat to a bather caused by the electrification of a ground wire or the electrification of a water pipe, so as to fully ensure the bathing safety.
The second technical problem is solved by the following technical scheme:
a control method of a water heater comprises the following steps:
s100: acquiring a flow detection value of a flow sensor, and when the flow detection value is larger than zero, entering step S200 and step S300, wherein the step S200 and the step S300 are executed simultaneously;
s200: judging whether a first temperature detection value of a first temperature sensor is greater than or equal to a first temperature preset value or not, wherein the first temperature sensor is used for detecting the water temperature of a water inlet in the water tank, if so, entering a step 210, otherwise, entering a step 220;
s210: closing a first electric heating pipe positioned at the water inlet;
s220: connecting a first electric heating pipe positioned at the water inlet;
s300: judging whether a second temperature detection value of a second temperature sensor is greater than or equal to a second temperature preset value, wherein the second temperature sensor is used for detecting the water temperature in the water tank, the second temperature preset value is greater than the first temperature preset value, if so, entering a step S310, otherwise, entering a step S320;
s310: closing a second electric heating pipe positioned at a water outlet in the water tank;
s320: and a second electric heating pipe positioned at a water outlet in the water tank is communicated.
Compared with the background technology, the control method of the water heater provided by the embodiment of the invention has the following beneficial effects: the invention can quickly heat the low-temperature cold water at the water inlet through the first electric heating pipe under the condition of lower tap water temperature in winter, thereby ensuring that the second electric heating pipe can heat the water to the bathing requirement in a short time. The invention can quickly output hot water in any season, greatly reduces the waiting time and realizes the instant hot washing function.
The above technical solution is further explained as follows:
in one embodiment, in step S100, when the flow detection value is equal to zero, step S400 is entered;
s400: judging whether a second temperature detection value of the second temperature sensor is greater than or equal to a first preheating requirement value, the first predetermined temperature value being less than the first preheating requirement value, if so, entering step S410, otherwise, entering step S420;
s410: closing the first electric heating pipe;
s420: switching on the first electric heating pipe to preheat water in the water tank, and entering step S421;
s421: and (3) judging whether a second temperature detection value of the second temperature sensor is greater than or equal to a second preheating requirement value, wherein the first preset temperature value is less than the first preheating requirement value and less than or equal to the second preheating requirement value, and if so, entering step S410, otherwise, entering step S420.
When no bath water is output, that is, when the water heater is in standby, it is determined through step S400 whether the water in the water tank needs to be heated to achieve the preheating function, and when the water temperature in the water tank reaches the preheating requirement value, it is ensured that the hot water meeting the bath requirement can be rapidly output.
In one embodiment, the first preheating requirement value is less than the second preheating requirement value, so that the heating process in the preheating stage can be heated to a higher temperature, errors caused by the fact that temperature detection is not sensitive and accurate enough are prevented, the heating temperature is possibly lower than the first preheating requirement value, and therefore the instantaneous heating function is further guaranteed.
In one embodiment, before step S100, the method further includes the steps of:
s500: judging whether the voltage detection value of the photovoltaic power generation assembly is greater than or equal to a voltage preset value, if so, entering a step S510, otherwise, entering a step S520;
s510: switching on a photovoltaic heating pipe in the water tank, and entering the step S100;
s520: and closing the photovoltaic heating pipe in the water tank, and entering the step S100.
The photovoltaic heating pipe mainly plays the effect of preheating, has the sunshine condition promptly, starts the photovoltaic heating pipe, makes the water of water tank heat up. When the intensity of the sun is high, the water temperature can reach a certain temperature, and the auxiliary electric heating pipes (the first electric heating pipe and the second electric heating pipe) do not need to be connected, otherwise, the auxiliary electric heating pipes need to be connected. When the sun is absent or the intensity of the sun is very low, the bathing requirement can be met only by the auxiliary electric heating pipe. The invention achieves the effects of saving electricity consumption and energy while realizing the instant hot washing function.
Drawings
FIG. 1 is a schematic structural diagram of a water heater according to an embodiment of the present invention;
FIG. 2 is a flow chart of a control method of a water heater according to an embodiment of the invention;
fig. 3 is a flowchart of a control method of a water heater according to another embodiment of the invention.
Description of the reference numerals:
10. the water tank, 11, the shell, 12, the heat preservation, 13, the inner bag, 14, the drain, 20, the inlet tube, 21, the water inlet, 30, the outlet pipe, 31, the delivery port, 41, first electric heating pipe, 42, the second electric heating pipe, 43, the photovoltaic heating pipe, 51, first temperature sensor, 52, the second temperature sensor, 61, first relay, 62, the second relay, 63, the third relay, 70, flow sensor, 80, the magnesium stick, 90, prevent electric wall, 100, the controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. In addition, unless otherwise specified, the terms "first" and "second" and the like in the description are used for distinguishing various components, elements, steps and the like in the description, and are not used for representing logical relationships or sequential relationships among the various components, elements, steps and the like.
As shown in fig. 1, the water heater of the present invention includes a water tank 10, a water inlet pipe 20, a water outlet pipe 30, a flow sensor 70, a first temperature sensor 51, a second temperature sensor 52, a first electric heating pipe 41, a second electric heating pipe 42 and a controller 100. The water inlet pipe 20 is provided with a water inlet 21 positioned in the water tank 10; the water outlet pipe 30 is provided with a water outlet 31 which is positioned in the water tank 10 and is used for outputting hot water in the water tank 10. The first temperature sensor 51 is used for detecting the water temperature at the water inlet 21, the first electric heating pipe 41 is arranged at the water inlet 21, and the first electric heating pipe 41 is a submerged heating pipe. The second temperature sensor 52 is used to detect the temperature of water in the water tank 10. The second electric heating pipe 42 is arranged at the water outlet 31, and the second electric heating pipe 42 is an upward-submerged heating pipe. The flow sensor 70 is disposed on the water outlet pipe 30, and the flow sensor 70 is configured to detect whether water is output. The flow sensor 70, the first temperature sensor 51, the second temperature sensor 52, the first electric heating pipe 41 and the second electric heating pipe 42 are all electrically connected to the controller 100. The electrical connection may be a wired connection or a wireless connection.
The working principle of the water heater is explained as follows: a first electric heating pipe 41 is arranged at the water inlet 21 of the water heater, and a second electric heating pipe 42 is arranged at the water outlet 31 of the water heater. When the flow sensor 70 detects that there is a flow in the water outlet pipe 30, that is, when it indicates that the user is bathing, it can determine whether to turn on the first electric-heating pipe 41 according to the first temperature detection value (i.e., the water inlet temperature) detected by the first temperature sensor 51. When the temperature of the inlet water is lower than a first predetermined temperature (for example, 25 ℃), the first electric heating pipe 41 is turned on to allow the cold water at the water inlet 21 to be heated instantly and to heat the whole tank of water, otherwise, the first electric heating pipe 41 is not required to be turned on. Meanwhile, it is determined whether the second electric-heating pipe 42 needs to be turned on or not by a second temperature detection value (i.e., the temperature of water inside the entire water tank 10) detected by the second temperature sensor 52. When the temperature of the water in the water tank 10 is lower than a second predetermined temperature value (for example, 40 ℃), the second electric heating pipe 42 is opened to rapidly raise the temperature of the water at the water outlet 31 to meet the requirement of instant bath, otherwise, the second electric heating pipe 42 is not required to be opened. The first temperature sensor 51, the second temperature sensor 52 (temperature measuring blind pipe), the first electric heating tube 41, the second electric heating tube 42 and the flow sensor 70 all control corresponding actions according to logic through the controller 100, so as to realize a rapid automatic heating function. Therefore, in the invention, under the condition that the tap water temperature is lower in winter, the low-temperature cold water at the water inlet 21 can be rapidly heated through the first electric heating pipe 41, so that the second electric heating pipe 42 can heat the water to the bathing requirement in a short time. The invention can quickly output hot water in any season, greatly reduces the waiting time and realizes the instant hot washing function.
In the present embodiment, please continue to refer to fig. 1, the water heater further includes a photovoltaic heating pipe 43 (photovoltaic heating pipe). The photovoltaic heating pipe 43 is used for being connected with a photovoltaic power generation component. The photovoltaic heating pipe 43 is arranged in the water tank 10 to preheat the water tank 10, and the photovoltaic heating pipe 43 is electrically connected with the controller 100. The controller 100 of the present invention can control the on/off of the photovoltaic power and the commercial power by detecting the photovoltaic voltage information of the photovoltaic power generation assembly, so as to realize the intelligent complementation of the alternating current and the direct current, and the commercial power is mainly used for the first electric heating tube 41 and the second electric heating tube 42 to work. When the photovoltaic voltage information reaches a voltage preset value (such as 8 VDC), the photovoltaic heating pipe 43 can be connected to heat water in the water tank 10, the photovoltaic heating pipe 43 mainly can achieve the preheating effect in the water tank 10 to store sufficient hot water in advance, the hot water can be timely and sufficiently supplied when the water is used, and waiting is avoided. For example, when the water temperature of the photovoltaic preheating reaches the first preheating requirement value (for example, 28 ℃), the first electric heating tube 41 may not be switched on for preheating; otherwise, the auxiliary preheating can be performed by the first electric heating tube 41. When the water temperature of the photovoltaic preheating exceeds a second preset temperature value (such as 40 ℃), hot water can be directly output without connecting a second electric heating pipe 42 for heating; on the contrary, the water can be heated and discharged through the second electric heating pipe 42, so that the photovoltaic heating and the electric auxiliary heating can be simultaneously performed. Therefore, the auxiliary heater (including the first electric heating pipe 41 and the second electric heating pipe 42) can be controlled to be powered on and off by detecting the water temperature or remote control information, so that the instant hot washing function is realized, and the effects of saving electricity consumption and energy are achieved. It should be noted that, from the viewpoint of using the photo electricity preferentially, on the premise of meeting the bathing requirement and before the water temperature in the water tank 10 reaches the maximum limit value (such as 90 ℃), the photo electricity is used as much as possible to heat the water tank 10, and the electric supply is cut off.
Further, the first electric heating pipe 41 is connected with the mains supply through a first relay 61, the second electric heating pipe 42 is connected with the mains supply through a second relay 62, and the photovoltaic heating pipe 43 is connected with the photovoltaic power generation assembly through a third relay 63. The first relay 61, the second relay 62 and the third relay 63 are electrically connected to the controller 100. The controller 100 can control the energization and the de-energization of the first electric heating tube 41, the second electric heating tube 42 and the photovoltaic heating tube 43 only by controlling the first relay 61, the second relay 62 and the third relay 63, and the first electric heating tube 41, the second electric heating tube 42 and the photovoltaic heating tube 43 are more conveniently and accurately controlled by the arrangement of the first relay 61, the second relay 62 and the third relay 63.
Optionally, the first electric heating pipe 41 and the second electric heating pipe 42 are both of a double-helix annular structure, the first electric heating pipe 41 is sleeved on the water inlet pipe 20 and is close to the water inlet 21, and the second electric heating pipe 42 is sleeved on the water outlet pipe 30 and is close to the water outlet 31. The first electric-heating pipe 41 and the second electric-heating pipe 42 of the annular structure are used for heating water at the water inlet 21 and the water outlet 31, respectively, in a short time, so that the temperature of the water instantaneously reaches a requirement.
It should be noted that the water tank 10 includes a housing 11, an inner container 13 and a heat insulating layer 12, the heat insulating layer 12 is disposed between the housing 11 and the inner container 13, and the first electric heating pipe 41, the second electric heating pipe 42, the photovoltaic heating pipe 43, the first temperature sensor 51 and the second temperature sensor 52 are all located in the inner container 13. The term "inside the tank 10" as used herein refers to "inside the inner container 13". In addition, in the embodiment, the invention also comprises a magnesium rod 80 arranged in the water tank 10, and the water tank 10 is provided with a sewage draining outlet 14. The magnesium rod 80 is arranged close to the sewage outlet 14, so that the inner container 13 of the water tank 10 can be prevented from being corroded, and the service life of the inner container 13 is prolonged.
Referring to fig. 1, the water tank 10 is provided with a first inlet and outlet for the water inlet pipe 20 to extend out and a second inlet and outlet for the water outlet pipe 30 to extend out, and the first inlet and outlet and the second inlet and outlet are both provided with electricity-proof walls 90. The electricity-proof wall 90 can prevent the electric leakage possibly generated by the water heater itself, and also can prevent the safety threat to the bather caused by the electrification of the ground wire or the electrification of the water pipe, so as to fully ensure the bathing safety.
As shown in fig. 2, an embodiment of the present invention further provides a control method for the above water heater, which specifically includes the following steps:
s100: acquiring a flow detection value of the flow sensor 70, judging whether the flow detection value is larger than zero, and if so, entering step S200 and step S300, wherein the step S200 and the step S300 are executed simultaneously;
s200: judging whether a first temperature detection value of a first temperature sensor 51 is greater than or equal to a first temperature preset value (such as 25 ℃), wherein the first temperature sensor 51 is used for detecting the water temperature of a water inlet 21 in the water tank 10, if so, entering a step 210, otherwise, entering a step 220;
s210: the first electric heating tube 41 at the water inlet 21 is closed, i.e. the first relay 61 is de-energized;
s220: the first electric heating tube 41 at the water inlet 21 is switched on, that is, the first relay 61 is electrified;
s300: judging whether a second temperature detection value of a second temperature sensor 52 is greater than or equal to a second predetermined temperature value (for example, 40 ℃), wherein the second temperature sensor 52 is used for detecting the water temperature in the water tank 10, the second predetermined temperature value is greater than the first predetermined temperature value, if so, the step S310 is executed, otherwise, the step S320 is executed;
s310: the second electric heating pipe 42 at the water outlet 31 in the water tank 10 is turned off, that is, the second relay 62 is powered off, so that the water temperature is prevented from being too high, and the safety of instant hot washing is ensured;
s320: the second electric heating tube 42 at the water outlet 31 in the water tank 10 is switched on, i.e. the second relay 62 is energized.
Compared with the background art, the control method of the water heater provided by the embodiment of the invention has the following beneficial effects: in the invention, under the condition of low tap water temperature in winter, the low-temperature cold water at the water inlet 21 can be rapidly heated through the first electric heating pipe 41, so that the second electric heating pipe 42 can heat the water to the bathing requirement in a short time. The invention can quickly output hot water in any season, greatly reduces the waiting time and realizes the instant hot washing function.
In addition, because the water temperature in the water tank 10 is kept above a certain temperature (28 ℃) all the time, namely kept in a preheating state all the time, the existing hot water output of the faucet or the shower head can be ensured to be opened. Therefore, as shown in fig. 3, in another embodiment, when there is no water for bathing output, that is, when the water heater is in standby, that is, when the flow detection value is equal to zero in step S100, it is determined whether the water in the water tank 10 needs to be heated so as to reach the preheating state (equal to or greater than 28 ℃) through step S400. Step S400 is specifically as follows:
s400: determining whether or not a second temperature detection value of said second temperature sensor 52 is greater than or equal to a first pre-heating demand value (e.g., 28 ℃), said first predetermined temperature value < said first pre-heating demand value < said second predetermined temperature value, and if greater than or equal to said first pre-heating demand value, proceeding to step S410, otherwise, proceeding to step S420;
s410: the first electric heating tube 41 is turned off, i.e. the first relay 61 is de-energized;
s420: the first electric heating pipe 41 is turned on to preheat the water in the water tank 10, that is, the first relay 61 is powered on, and the process goes to step S421;
s421: it is determined whether or not a second temperature detection value of the second temperature sensor 52 is greater than or equal to a second preheating requirement value (e.g., 30 ℃), the first predetermined temperature value < the first preheating requirement value < the second predetermined temperature value, and if greater than or equal to the second preheating requirement value, the routine proceeds to step S410, otherwise, the routine proceeds to step S420.
Optionally, the first preheating requirement value (e.g. 28 ℃) is smaller than the second preheating requirement value (e.g. 30 ℃) so as to ensure that the heating can be heated to a higher temperature in the heating process in the preheating stage, so as to prevent the phenomenon that the heating temperature may be lower than the first preheating requirement value due to the error caused by the insensitivity and accuracy of temperature detection, and further ensure the instant heating function.
In addition, with reference to fig. 3, before step S100, the method further includes the following steps:
s500: judging whether the voltage detection value of the photovoltaic power generation assembly is larger than or equal to a voltage preset value (such as 8 VDC), if so, entering the step S510, otherwise, entering the step S520;
s510: switching on the photovoltaic heating pipe 43 in the water tank 10, that is, energizing the third relay 63, and proceeding to step S100;
s520: the photovoltaic heating pipe 43 in the water tank 10 is turned off, that is, the third relay 63 is de-energized, and the process proceeds to step S100.
The photovoltaic heating pipe 43 mainly has a preheating function, that is, under the condition of sunlight, the photovoltaic heating pipe 43 is started to heat the water in the water tank 10. When the intensity of the sun is high, when the second temperature sensor 52 detects that the temperature of the water in the water tank 10 can reach the first preheating requirement value (28 ℃), the first electric heating pipe 41 does not need to be connected for preheating; otherwise, the photovoltaic heating and the commercial power auxiliary heating are simultaneously carried out by preheating the first electric heating tube 41 to 30 ℃. Further, under the action of the photovoltaic heating pipe 43, when the second temperature sensor 52 detects that the water temperature in the water tank 10 further reaches the bathing requirement (such as 40 ℃), the second electric heating pipe 42 does not need to be connected for instantaneous washing heating; otherwise, the second electric-heating tube 42 is switched on for instantaneous heating, and the second electric-heating tube 42 is normally switched on only when there is a flow rate. When there is no sun or the intensity of the sun is small, the preheating and instantaneous heating requirements can be achieved only by the auxiliary electric heating pipes, such as the first electric heating pipe 41 for preheating and the second electric heating pipe 42 for instantaneous heating. The invention achieves the effects of saving electricity consumption and energy while realizing the instant hot washing function.
It should be noted that, the "turning on" of the first electric heating tube 41, the second electric heating tube 42, and the photovoltaic heating tube 43 all refer to "powering on" of the first relay 61, the second relay 62, and the third relay 63; conversely, turning "off" the first electric heating tube 41, the second electric heating tube 42, and the photovoltaic heating tube 43 all means that the first relay 61, the second relay 62, and the third relay 63 are "de-energized". In addition, for the purpose of clearly explaining the present invention, specific values, such as 25 ℃, 28 ℃,30 ℃, 40 ℃, 8VDC, etc., are used herein for illustration and are not intended to be a limitation of the present invention.
In conclusion, in the invention, when the temperature of tap water is low in winter, the first electric heating pipe 41 can be used for quickly heating the low-temperature cold water at the water inlet 21, so that the second electric heating pipe 42 can be used for heating the water to the bathing requirement in a short time. The invention can quickly output hot water in any season, greatly reduces the waiting time and realizes the instant hot washing function. The invention can control the on-off of the photovoltaic power and the commercial power by detecting the photovoltaic voltage information of the photovoltaic power generation assembly, thereby realizing the intelligent complementation of the alternating current and the direct current, realizing the instant hot washing function and simultaneously achieving the effects of saving power consumption and energy.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several 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 various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention.
Claims (10)
1. The water heater is characterized by comprising a water tank (10), a water inlet pipe (20), a water outlet pipe (30), a flow sensor (70), a first temperature sensor (51), a second temperature sensor (52), a first electric heating pipe (41), a second electric heating pipe (42), a controller (100) and a photovoltaic heating pipe (43), wherein the water inlet pipe (20) is provided with a water inlet (21) positioned in the water tank (10), the water outlet pipe (30) is provided with a water outlet (31) positioned in the water tank (10), the first temperature sensor (51) is used for detecting the water temperature at the water inlet (21), the first electric heating pipe (41) is arranged at the water inlet (21), the second temperature sensor (52) is used for detecting the water temperature in the water tank (10), the second electric heating pipe (42) is arranged at the water outlet (31), the flow sensor (70) is arranged on the water outlet pipe (30), and the first temperature sensor (51), the second temperature sensor (52), the first electric heating pipe (41), the second electric heating pipe (42) and the flow sensor (70) are electrically connected with the flow controller (100); the photovoltaic heating pipe (43) is used for being connected with a photovoltaic power generation assembly, the photovoltaic heating pipe (43) is arranged in the water tank (10), and the photovoltaic heating pipe (43) is electrically connected with the controller (100);
the controller (100) is used for starting the first electric heating pipe (41) when detecting that the flow rate of the water outlet pipe (30) exists and the water inlet temperature is lower than a first temperature preset value; the controller (100) is used for detecting the flow of the water outlet pipe (30) and starting the second electric heating pipe (42) when the temperature of the water in the water tank (10) is lower than a second preset temperature value; the controller (100) is used for controlling the connection and disconnection of photovoltaic electricity and mains supply by detecting photovoltaic voltage information of the photovoltaic power generation assembly.
2. The water heater according to claim 1, wherein the first electric heating pipe (41) is connected with the mains supply through a first relay (61), the second electric heating pipe (42) is connected with the mains supply through a second relay (62), the photovoltaic heating pipe (43) is connected with the photovoltaic power generation assembly through a third relay (63), and the first relay (61), the second relay (62) and the third relay (63) are all electrically connected with the controller (100).
3. The water heater according to any one of claims 1 to 2, characterized in that the first electric heating pipe (41) and the second electric heating pipe (42) are both of an annular structure, the first electric heating pipe (41) is sleeved on the water inlet pipe (20) and is arranged near the water inlet (21), and the second electric heating pipe (42) is sleeved on the water outlet pipe (30) and is arranged near the water outlet (31).
4. A water heater according to claim 3, characterized in that the first electric heating pipe (41) and the second electric heating pipe (42) are both of double-helix annular structure.
5. The water heater according to any one of claims 1 to 2, further comprising a magnesium rod (80) disposed within the water tank (10), the water tank (10) being provided with a drain (14), the magnesium rod (80) being disposed proximate to the drain (14).
6. A water heater according to any one of claims 1-2, wherein the water tank (10) is provided with a first inlet and outlet through which the inlet pipe (20) extends and a second inlet and outlet through which the outlet pipe (30) extends, and wherein both the first inlet and outlet are provided with electricity-proof walls (90).
7. A control method for a water heater using any one of claims 1 to 6, comprising the steps of:
s100: acquiring a flow detection value of a flow sensor (70), and when the flow detection value is larger than zero, entering step S200 and step S300, wherein the step S200 and the step S300 are executed simultaneously;
s200: judging whether a first temperature detection value of a first temperature sensor (51) is greater than or equal to a first temperature preset value or not, wherein the first temperature sensor (51) is used for detecting the water temperature of a water inlet (21) in the water tank (10), if so, entering a step 210, otherwise, entering a step 220;
s210: closing a relay switch K1 at the water inlet (21) for controlling a first electric heating tube (41);
s220: switching on a relay switch K1 which is positioned at the water inlet (21) and controls a first electric heating pipe (41);
s300: judging whether a second temperature detection value of a second temperature sensor (52) is greater than or equal to a second temperature preset value or not, wherein the second temperature sensor (52) is used for detecting the water temperature in the water tank (10), the second temperature preset value is greater than the first temperature preset value, if so, entering a step S310, otherwise, entering a step S320;
s310: closing a relay switch K2 which is positioned at a water outlet (31) in the water tank (10) and controls a second electric heating pipe (42);
s320: and switching on a relay switch K2 which is positioned at a water outlet (31) in the water tank (10) and controls the second electric heating pipe (42).
8. The control method of a water heater according to claim 7, wherein in the step S100, when the flow rate detection value is equal to zero, the flow rate detection value proceeds to step S400;
s400: determining whether a second temperature detection value of said second temperature sensor (52) is greater than or equal to a first pre-heating demand value, said first predetermined temperature value being less than said first pre-heating demand value less than said second predetermined temperature value, entering step S410 if greater than or equal to said first pre-heating demand value, otherwise entering step S420;
s410: closing a relay switch K1 for controlling the first electric heating tube (41);
s420: switching on the first electric heating pipe (41) for preheating water in the water tank (10), and entering step S421;
s421: and (2) judging whether a second temperature detection value of the second temperature sensor (52) is greater than or equal to a second preheating requirement value, the first temperature preset value is less than the first preheating requirement value and less than the second preheating requirement value, if so, entering a step S410, otherwise, entering a step S420.
9. The control method of a water heater according to claim 8, wherein the first warm-up demand value < second warm-up demand value.
10. The control method of a water heater according to any one of claims 7 to 9, further comprising the step of, before step S100:
s500: judging whether the voltage detection value of the photovoltaic power generation assembly is larger than or equal to a voltage preset value or not, if so, entering a step S510, otherwise, entering a step S520;
s510: switching on a relay switch K3 which is positioned in the water tank (10) and controls the photovoltaic heating pipe (43), and entering the step S100;
s520: closing a relay switch K3 which is positioned in the water tank (10) and controls the photovoltaic heating pipe (43), and entering the step S100.
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| CN201711016392.0A CN107606780B (en) | 2017-10-25 | 2017-10-25 | Water heater and control method thereof |
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| CN201711016392.0A CN107606780B (en) | 2017-10-25 | 2017-10-25 | Water heater and control method thereof |
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| CN108361972B (en) * | 2018-05-22 | 2023-07-18 | 珠海格力电器股份有限公司 | Water heater and hot water system with same |
| CN108731255A (en) * | 2018-06-29 | 2018-11-02 | 池州市德聚软件开发有限公司 | A kind of safe electric heater |
| CN110848968B (en) * | 2018-08-20 | 2023-04-21 | 青岛经济技术开发区海尔热水器有限公司 | Water heater and control method thereof |
| CN111912113A (en) * | 2019-05-10 | 2020-11-10 | 芜湖美的厨卫电器制造有限公司 | Water heater and water using detection method, system and computer readable storage medium thereof |
| CN110160258A (en) * | 2019-05-28 | 2019-08-23 | 广东万博电气有限公司 | A kind of hose type anti-electricity wall and its hot water facility |
| CN110762856A (en) * | 2019-11-09 | 2020-02-07 | 山东光百特光能科技有限公司 | Photon energy and mains supply alternating current two-in-one dual-energy water heater |
| CN115218478B (en) * | 2021-04-21 | 2024-03-15 | 广东万和电气有限公司 | Electric water heater and working method thereof |
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| CN100467972C (en) * | 2006-01-16 | 2009-03-11 | 王焱 | Energy saving controlling method for electric water heater, and electrically heating system |
| CN101900409B (en) * | 2010-08-12 | 2012-09-05 | 奥特朗电器（广州）有限公司 | Double-mode single-core preheating and instant electric water heater |
| CN202229422U (en) * | 2011-08-11 | 2012-05-23 | 海尔集团公司 | Electric water heater |
| CN103090532A (en) * | 2013-01-08 | 2013-05-08 | 青岛经济技术开发区海尔热水器有限公司 | Rapid electric water heater |
| CN105157214A (en) * | 2015-10-13 | 2015-12-16 | 山东力诺瑞特新能源有限公司 | Photoelectric water heater with intelligent regulating and controlling function |
| CN205299915U (en) * | 2016-01-20 | 2016-06-08 | 艾欧史密斯(中国)热水器有限公司 | Electric water heater |
| CN207649078U (en) * | 2017-10-25 | 2018-07-24 | 广东万和新电气股份有限公司 | Water heater |
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