CN115235122A - Method for adjusting liquid temperature according to water flow information - Google Patents
Method for adjusting liquid temperature according to water flow information Download PDFInfo
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- CN115235122A CN115235122A CN202210350254.0A CN202210350254A CN115235122A CN 115235122 A CN115235122 A CN 115235122A CN 202210350254 A CN202210350254 A CN 202210350254A CN 115235122 A CN115235122 A CN 115235122A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 306
- 239000007788 liquid Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 154
- 238000009835 boiling Methods 0.000 claims abstract description 19
- 230000007423 decrease Effects 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 4
- 230000036760 body temperature Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000003287 bathing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012546 transfer 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
- 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
- F24H9/2028—Continuous-flow 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
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention discloses a method for adjusting liquid temperature according to water flow information, which is applied to an electric control water heater system, wherein a first temperature sensor is arranged in the electric control water heater system, the first temperature sensor can detect the heated liquid temperature and/or the temperature of a machine body and generate corresponding first temperature information, the electric control water heater system can obtain corresponding water flow according to a first temperature value contained in each first temperature information so as to record the water flow as a water closing state or a water boiling state, and the electric control water heater system can increase or decrease the current heating power of a heating unit according to the water flow information of the water closing state or the water boiling state recorded in a set period so as to increase or decrease the liquid temperature flowing out of a water control valve, so that a user can easily adjust the water temperature only by opening or closing the water control valve.
Description
Technical Field
The invention relates to a method for adjusting the temperature of an electric control water heater, in particular to a method for adjusting the outlet water temperature by opening or closing a water control valve for a plurality of times by a user.
Background
Generally, a gas water heater uses a gas tank as a heating source, but since a user cannot easily directly observe the amount of the remaining gas in the gas tank, the user often feels a trouble that half of the gas tank is washed without gas, and the gas water heater needs to be especially installed at a ventilation position (for example, in a ventilation position) to ensure safety, so that more and more people start to use the electric water heater.
Bearing in mind, the electric control water heater is generally divided into two types, the first type is a water storage type electric control water heater, which heats water to a fixed temperature first and then starts a temperature controller to keep constant temperature, but although the water storage type electric control water heater claims to preheat once enough for a plurality of people, in fact, when the later people take a bath, the water temperature is lower and lower, and even needs to be reheated, and because the water storage type electric control water heater needs more water for heating once, the preheating time is longer, and the waiting time for taking a bath is prolonged. In addition, the storage type electric water heater also needs to be provided with a large-capacity storage liner (approximately 40 liters to more than 100 liters), obviously occupies too much indoor space for small-sized urban households, and because the storage liner does not have the capacity of completely preserving heat, once the water temperature is reduced to a certain temperature, the storage type electric water heater automatically starts the heating function, so that even if no one uses the storage type electric water heater, the situation of continuous power consumption still exists.
In addition, the second type is an instant electric water heater, which controls the water temperature (i.e. electric heating mode) through an electronic heating unit, so that cold water can be rapidly heated to reach a temperature suitable for bathing. Although the instant electric water heater needs to heat water to a predetermined temperature in a short time (about several seconds), so that the heating power of the instant electric water heater needs to reach 5000 watts (W) to 8500 watts (W), because the instant electric water heater is used for heating water, and the bathing time of general people is mostly tens of minutes, the electric quantity consumed by the instant electric water heater throughout the day is lower than that of a water storage type electric water heater, and importantly, because a large-capacity water storage inner container is not needed, the whole volume of the instant electric water heater is smaller, so that people are increasingly using the instant electric water heater nowadays.
Referring now to the structure of a conventional electrically controlled instantaneous water heater 1, as shown in fig. 1, the electrically controlled instantaneous water heater includes a water supply pipe 11, a flowmeter 12, a heating unit 13, two temperature sensors 14A and 14B, and a control unit 15, wherein the water supply pipe 11 is defined by an upstream area 11A, a heating area 11B, and a downstream area 11C, and liquid can flow into the water supply pipe 11 from a water inlet, and sequentially flow through the upstream area 11A, the heating area 11B, and the downstream area 11C, and then flow out of the water supply pipe 11 through a faucet 16. The flow meter 12 is disposed at the upstream area 11A, and when the user turns on the faucet 16 to make the liquid in the water supply line 11 flow out, the flow meter 12 can detect the current flow and generate the corresponding flow information. The structure of the conventional flowmeter 12 can include a rotor, and when the rotor is pushed by water, the sensor (e.g., hall sensor) located outside the water supply line 11 can sense the rotation speed of the rotor to obtain the water flow rate, for example, if the rotor is magnetic, the sensor (e.g., hall sensor) can also sense the change of the magnetic field outside the water supply line 11 to detect the water flow rate; in addition, the flow meter 12 can be mechanical in nature, for example, it can have a reed that is pushed when water flows, and a sensor (e.g., stress sensor) can detect changes in stress on the reed to detect water flow.
In addition, as shown in fig. 1, the heating unit 13 is disposed in the heating zone 11B, and is capable of heating the liquid in the heating zone 11B. The two temperature sensors 14A, 14B are respectively disposed in the upstream area 11A and the downstream area 11C to respectively detect the current liquid temperature and generate corresponding temperature information. The control unit 15 can receive the flow rate information and the temperature information, and when the control unit 15 determines that the water is currently in the off state (i.e. the water tap 16 is turned off) according to the flow rate information, the control unit stops the operation of the heating unit 13 to avoid the idle heating condition caused by overheating. When the control unit 15 determines that the water is currently in a boiling state (i.e., the faucet 16 is turned on) based on the flow rate information, it can adjust the heating power of the heating unit 13 based on the temperature information. For example, the control unit 15 can depend on the "water temperature (T) of the upstream zone 11A IN ) The heating Power (Power) of the heating unit 13 is calculated by multiplying the current flow rate (flow) by the temperature difference between "and" set temperature value (T1) ", as follows:
(T IN –T1)×flow＝Power
the control unit 15 is also able to modify the heating power of the heating unit 13 according to the water temperature of the downstream zone 11C, so that the water temperature exiting the tap 16 can be matched to the temperature set by the user.
Although the user usually sets the water temperature in advance, the user often has a requirement for adjusting the water temperature along with the influence of the environment or other factors, because the button for adjusting the temperature is arranged on the body of the instant electric water heater 1, and the installation position of the body may be separated from the water using place by a certain distance, the user needs to go back and forth several times between the body and the water using place to feel the water temperature and operate the button in person, which causes a trouble in setting, and particularly, if the user is bathing in the middle of the user, it is obviously inconvenient to go out to operate the button. In addition, although some of the instant electric water heaters 1 have wireless remote controllers, they are still missing in practical use, firstly, if the wireless remote controllers adopt infrared technology, they need to be accurately aligned with the machine body to be able to operate, and secondly, the wireless remote controllers need to have a waterproof mechanism to avoid being damaged by external moisture.
As described above, although the volume between the water inlet and the water outlet of the instant electric water heater is not large, which is helpful for the heating unit to heat the cold water, the above-mentioned temperature adjusting method is not sufficient, and therefore, how to effectively solve the above-mentioned problems is an important subject of the present invention.
Disclosure of Invention
In view of the improvement of the existing electric water heater, after repeated research and test, the method for adjusting the liquid temperature according to the water flow information of the present invention is finally developed, and it is expected that the present invention provides a method for adjusting the temperature of an electric water heater with better experience and convenience.
The present invention provides a method for adjusting liquid temperature according to water flow information, which is applied to an electric control water heater system, wherein the electric control water heater system at least comprises a machine body, a water supply pipeline, a heating unit, a first temperature sensor and a control unit, wherein the water supply pipeline is positioned in the machine body and is divided into an upstream area, a heating area and a downstream area, and liquid flows through the upstream area, the heating area and the downstream area in sequence after flowing into the water supply pipeline, and then flows out of the water supply pipeline through a water control valve; the heating unit is positioned in the machine body and can heat the liquid flowing through the heating area; the first temperature sensor is positioned in the machine body and can detect the liquid temperature and/or the machine body temperature which are substantially the same as the downstream area and generate corresponding first temperature information; the control unit is positioned in the machine body and is respectively and electrically connected with the heating unit and the first temperature sensor so as to open and close the heating unit and receive first temperature information transmitted by the first temperature sensor; the method is that the control unit can receive a plurality of first temperature information transmitted by the first temperature sensor and respectively read the first temperature values; then, the control unit can obtain corresponding water flow according to the current heating power of the heating unit and each first temperature value; the control unit can record the water flow as a water-off state when the water flow is zero or substantially zero, or record the water flow as a boiled water state when the water flow is not zero or substantially non-zero; the control unit can increase or decrease the current heating power of the heating unit according to the water flow information of the water closing state or the water boiling state during a set period so as to increase or decrease the temperature of the liquid flowing out of the water supply pipeline. Therefore, a user does not need to leave the current position, does not need to additionally operate a wireless remote controller, and can easily adjust the water temperature by opening or closing the water control valve, so that the convenience in use is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a common instant electric water heater;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a schematic representation of first test data for this embodiment of the invention;
FIG. 4 is a graphical representation of second test data for this embodiment of the invention;
FIG. 5 is a flow chart of a tempering method of the present invention; and
fig. 6 is a schematic structural diagram of another embodiment of the present invention.
Description of reference numerals 1: instant electric water heater
11: water supply pipeline
11A: upstream zone
11B: heating zone
11C: downstream zone
12: flow meter
13: heating unit
14A, 14B: temperature sensor
15: control unit
16: water tap
2: electric control water heater system
20: fuselage body
21: water supply pipeline
21A: upstream zone
21B: heating zone
21C: downstream zone
210: inlet pipe
22: heating unit
221: heating power adjusting unit
23: first temperature sensor
24: control unit
241: timing unit
242: sound production unit
25: water control valve
26: second temperature sensor
Detailed Description
In order to make the objects, technical contents and advantages of the present invention more apparent, the following embodiment of the present invention will be described in further detail with reference to the accompanying drawings. Those skilled in the art can appreciate that the advantages and benefits of the invention disclosed herein may be realized and attained by other embodiments and uses of the invention, and that various modifications and changes may be made in the details of the present description without departing from the spirit and scope of the invention.
It should be noted that the drawings of the present invention are merely schematic illustrations and are not drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention. It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, each element should not be limited by the preceding terms, which are used primarily to distinguish one element from another. In addition, directional terms, such as "left", "right", etc., used in the following embodiments are only directions referring to the drawings, and therefore, the directional terms are used for illustration and are not used for limiting the scope of the present invention. Furthermore, as used herein, the term "substantially" refers to a value or a mean value of a plurality of values within a deviation range for a specific value, which can be recognized or determined by one skilled in the art, including a specific error that may occur when the specific value is measured in consideration of limitations of a measurement system or equipment, for example, a value substantially (substantially) mentioned can include ± 5%, ± 3%, ± 1%, ± 0.5%, ± 0.1% or one or more standard deviation ranges of the specific value.
Since the water control valves (e.g., faucets) for opening and closing water are disposed at the water consumption location and the operation is convenient, the main concept of the present invention is to enable the electric water heater system 2 to adjust the water temperature according to the way of opening and closing the water control valves (e.g., faucets) by the user, wherein the "opening the water control valves" mentioned in the following description represents the mode of opening hot water. It is particularly mentioned here that, as the common instantaneous electric water heater needs to be provided with a flow meter, the current flow and flow rate of the water flow can be obtained, and then the on/off of the heating unit is controlled. However, the flow meter not only occupies the internal space of the electric water heater, which is not beneficial to the miniaturization design, but also has higher cost, so the method of the present invention can be applied to the electric water heater system not including the flow meter, but not limited thereto, the electric water heater with the flow meter, or the electric water heater with the water storage type, or the water heater with the fuel (such as natural gas) and the electronic control function can also be used, as long as the water heater system has the necessary elements mentioned in the following embodiments, and the method of the present invention is also called as the electric water heater system 2 of the present invention.
As shown in fig. 2, in the first embodiment, the method of the present invention can be applied to the electric water heater system 2, and the electric water heater system 2 at least comprises a body 20, a water supply pipeline 21, a heating unit 22, a first temperature sensor 23 and a control unit 24, wherein the water supply pipeline 21, the heating unit 22, the first temperature sensor 23 and the control unit 24 can be disposed in the body 20. In addition, the liquid can flow into the water supply pipeline 21 through a water inlet pipe 210, and when the user opens the water control valve 25 (such as a faucet) (to supply hot water), the liquid in the water supply pipeline 21 will flow out of the water supply pipeline 21 through the water control valve 25. It is specifically mentioned here that, since the appearance of the body 20 of the electric water heater system 2 and the appearance of the water control valve 25 do not affect the effects expressed in the following embodiments, they are only drawn as examples, and those skilled in the art can grasp the technical features of the body 20 and the water control valve 25 according to the contents of the following embodiments.
As shown in fig. 2, the heating unit 22 is disposed on the water supply line 21 and can heat the liquid, in the embodiment, the water supply line 21 is divided into an upstream zone 21A, a heating zone 21B and a downstream zone 21C, wherein the heating unit 22 is located corresponding to the heating zone 21B to heat the liquid flowing through the heating zone 21B, and the area of the liquid before flowing into the heating zone 21B belongs to the upstream zone 21A (e.g. the position at the left of the heating zone 21B in fig. 2), and the area of the liquid after flowing into the heating zone 21B belongs to the downstream zone 21C (e.g. the position at the right of the heating zone 21B in fig. 2), i.e. after flowing into the water supply line 21, the liquid flows through the upstream zone 21A, the heating zone 21B and the downstream zone 21C in sequence and then flows out of the water control valve 25, and when the liquid is located in the upstream zone 21A, the liquid is not heated, and when the liquid is located in the downstream zone 21C, the liquid is heated.
As shown in fig. 2, the first temperature sensor 23 is disposed in the main body 20, and is capable of detecting a temperature of the liquid and/or the main body 20 substantially identical to the downstream area 21C and generating corresponding first temperature information, that is, a first temperature value included in the first temperature information can be a temperature of the liquid and/or the main body 20 after heating. The content of the first temperature value detected by the first temperature sensor 23 is as follows:
(1) The first temperature sensor 23 can directly detect the liquid temperature;
(2) The first temperature sensor 23 is capable of detecting ambient temperature adjacent the water supply line 21 (including the surface temperature of the water supply line 21); generally, the heating unit 22 heats the water supply pipeline 21 to transfer heat to the liquid inside through the water supply pipeline 21, so as to heat the liquid, in the process, the ambient temperature in the heated region (heating region 21B) or the liquid flowing region (downstream region 21C) will increase;
(3) The first temperature sensor 23 is capable of detecting the temperature of the liquid and the ambient temperature adjacent to the water supply line 21, respectively.
As shown in fig. 2, in the embodiment, the first temperature sensor 23 can be disposed at a boundary between the heating zone 21B and the downstream zone 21C, but not limited thereto, and in other embodiments, the first temperature sensor 23 can be disposed at a position corresponding to the heating zone 21B or a position corresponding to the downstream zone 21C. Because the water supply line 21 has a limited length, the temperature detected by the first temperature sensor 23 is close to or even equal to the acquired temperature no matter the heated liquid is in the heating zone 21B, the downstream zone 21C or flows out of the water control valve 25.
In addition, as shown in fig. 2, the control unit 24 can be electrically connected to the heating unit 22 and the first temperature sensor 23, respectively, the control unit 24 can receive the first temperature information to obtain the temperature of the heated liquid and/or the body 20, and it can also activate the heating unit 22, so that the heating unit 22 heats the heating area 21B; or the heating unit 22 can be turned off, so that the heating unit 22 no longer heats the heating area 21B. In this embodiment, the electric water heater system 2 further comprises a heating power adjustment unit 221 (heater power regulator), the heating power adjustment unit 221 is electrically connected to the control unit 24 and the heating unit 22, respectively, the control unit 24 can transmit a control message to the heating power adjustment unit 221, and the heating power adjustment unit 221 changes the heating power of the heating unit 22. In addition, in other embodiments of the present invention, the heating power adjustment unit 221 can also be integrated with the heating unit 22 without two separate elements as in fig. 2; furthermore, when the electrically controlled water heater system 2 is in the form of a water heater using fuel (e.g., natural gas) and having electronic control functions, the heating unit 22 can be heated by burning the fuel, rather than by electric heating as in the previous embodiment.
In addition, in other embodiments of the present invention, the first temperature sensor 23 can also be thermally coupled (thermally coupled) with the heating unit 22 to detect the temperature of the heating unit 22, for example, the temperature sensing head of the first temperature sensor 23 can contact the housing of the heating unit 22 or the metal on the housing; alternatively, the first temperature sensor 23 can be close to the heating unit 22 to detect the temperature of the heating unit 22 at a short distance; or, the electric water heater system 2 can be additionally provided with a heating temperature sensor for detecting the temperature of the heating unit 22; thus, the control unit 24 can control the heating power of the heating unit 22 by receiving the detection result of the first temperature sensor 23 or the heating temperature sensor.
Because the electric control water heater system 2 of the present invention lacks a flow meter, it determines whether the water control valve 25 is opened (i.e., boiling water state) or closed (i.e., water off state) and the current flow rate of water flowing out of the water control valve 25 according to the change of the liquid temperature. The relationship between the changes in the "heating power", "water flow" and "liquid temperature" will now be described. As shown in fig. 2, when the water control valve 25 is opened, the liquid in the water supply line 21 continuously flows out through the water control valve 25, so that the cold water (unheated liquid) continuously flows from the upstream zone 21A into the heating zone 21B, the liquid (heated liquid) in the heating zone 21B continuously flows into the downstream zone 21C, and the larger the opening of the water control valve 25, the faster the liquid flow speed in the water supply line 21, that is, the shorter the time the liquid is heated in the heating zone 21B. Therefore, when the heating unit 22 heats the liquid in the heating area 21B with a fixed heating power, the opening amplitude of the water control valve 25 is larger, so that the time that the liquid is in the heating area 21B is shorter, the temperature of the liquid flowing out of the water control valve 25 is lower, and the temperature of the body 20 corresponding to the heating area 21B and/or the downstream area 21C is lower; in other words, the smaller the opening width of the water control valve 25, the longer the liquid is in the heating area 21B, which results in the higher temperature of the liquid flowing out of the water control valve 25, and the higher temperature of the body 20 corresponding to the heating area 21B and/or the downstream area 21C.
To clearly illustrate the foregoing features, as shown in fig. 2 and 3, in the first test data, the heating power of the heating unit 22 is 1 kilowatt (kW), when the opening amplitude of the water control valve 25 is about 1.5 liters (L/min) of small water per minute, the temperature of the body 20 (e.g., the thick black line in fig. 3) is gradually increased from 25 degrees celsius and finally maintained at about 33 degrees celsius, and the temperature of the liquid (e.g., the thin black line in fig. 3) is increased from 25 degrees celsius to about 39 degrees celsius; thereafter, when the opening of the water control valve 25 is about 3.6 liters per minute (L/min) of large water flow, as the liquid outflow increases, the cold water in the upstream zone 21A rapidly enters the heating zone 21B, and the time for which the cold water stays in the heating zone 21B to be heated is reduced (compared with the case of small water flow), so that the liquid temperature (as indicated by the thin black line in fig. 3) gradually decreases from 39 ℃ to about 30 ℃, and the temperature of the body 20 (as indicated by the thick black line in fig. 3) decreases from 33 ℃ to about 28 ℃; when the water control valve 25 is closed (i.e., zero or substantially zero water flow per minute), the liquid temperature and the temperature of the fuselage 20 (e.g., the thin and thick black lines of fig. 3) continue to rise due to the heating effect of the heating unit 23 since the liquid in the water supply line 21 is no longer flowing, wherein the temperature of the fuselage 20 is more rapidly and continuously surging.
In addition, as shown in fig. 2 and 4, in the second test data, the heating power of the heating unit 22 is 2 kilowatts (kW), when the opening range of the water control valve 25 is about 1.5 liters (L/min) of small water flowing per minute, the temperature of the body 20 (e.g., the thick black line in fig. 3) is gradually increased from 25 degrees celsius and finally maintained at about 37 degrees celsius, and the temperature of the liquid (e.g., the thin black line in fig. 4) can be increased from 25 degrees celsius to about 44 degrees celsius; then, when the opening range of the water control valve 25 is about 3.6 liters (L/min) of large water flow per minute, the liquid temperature (as indicated by the thin black line in fig. 4) will gradually decrease from 44 ℃ to about 35 ℃, and the temperature of the body 20 (as indicated by the thick black line in fig. 3) will gradually decrease from 37 ℃ to about 31 ℃; when the water control valve 25 is closed (i.e., zero or substantially zero water flow per minute), both the liquid temperature and the body 20 temperature (e.g., the thin and thick black lines in fig. 4) continue to rise.
As mentioned above, the electric water heater system 2 can estimate the current flow rate of the liquid flowing out of the water control valve 25 according to the changes between the "heating power" and the "water flow" and "temperature", for example, the changes can be recorded into a Look Up Table (LUT), and the LUT can be stored in a memory and read by the control unit 24, wherein the memory can be a separate element or integrated in the control unit 24; alternatively, the three variations can be designed as corresponding formulas, and the control unit 24 can calculate the current liquid flow rate flowing out of the water control valve 25 through the formulas. Therefore, under the condition of no flow meter, the electric control water heater system 2 can still know whether the water control valve 25 is in the water boiling state or the water closing state and can know the water flow.
As shown in fig. 2, when the water control valve 25 is in the water-off state, the liquid in the water supply pipeline 21 will not dissipate too fast, so that the control unit 24 can heat the heating unit 22 in a pulse-width modulation (PWM) manner, and the heating unit is turned on (heating) for a short time and turned off for a long time, so as to maintain the liquid in the heating zone 21B and the downstream zone 21C at a predetermined temperature (e.g. 25 degrees celsius). Then, after the user opens the water control valve 25, the temperature detected by the first temperature sensor 23 is lower than the original temperature (e.g. 25 ℃) after the cold water (i.e. unheated liquid) flows into the water supply pipeline 21, so that the control unit 24 can determine that the water control valve 25 is opened according to the temperature value after receiving and reading the plurality of first temperature information returned by the first temperature sensor 23. For example, under the current heating power, according to the change of the average value of the first temperature values in the first temperature information, when the average value is lower than the original temperature (e.g. 25 ℃) by a set value (e.g. 2 ℃), it indicates that the water control valve 25 is opened currently; or according to the descending slope of the first temperature value in the first temperature information, the following formula is shown, wherein K is the slope, Δ C is the temperature difference, and Δ S is the time difference:
K＝△C/△S
when the falling slope meets the preset slope, the water control valve 25 is opened currently; or, according to the lowest temperature of the first temperature values in the first temperature information, when the lowest temperature and the original temperature (for example, 25 degrees centigrade) reach a predetermined temperature difference, it indicates that the water control valve 25 is opened currently.
As shown in fig. 2, when the water control valve 25 is in a boiling water state and the water temperature set by the user is 30 degrees celsius, although the control unit 24 cannot obtain the current water flow at first, after receiving the first temperature information, the control unit gradually increases the heating power of the heating unit 22 according to the first temperature (e.g., 25 degrees celsius) in the first temperature information until the water temperature set by the user (e.g., 30 degrees celsius) is met, and at this time, the heating power can be 1 kilowatt (kW). Furthermore, the control unit 24 can know that the current water flow rate is 3.6 liters per minute (L/min) from the heating power and the liquid temperature, and then the water temperature is increased when the user turns down the water flow, and the control unit 24 can reduce the heating power of the heating unit 22 according to the first temperature (e.g. 39 ℃) in the first temperature information until the water temperature (e.g. 30 ℃) set by the user is met. In the process of temperature adjustment, the control unit 24 can gradually reduce the heating power of the heating unit 22 according to the first temperature in the first temperature information; alternatively, the control unit 24 can calculate the current water flow rate and then directly adjust the heating power of the heating unit 22 to the corresponding value.
In addition, when the water control valve 25 is in the water boiling state, and then is closed and is in the water closing state, the control unit 24 can determine that the water control valve 25 is closed according to the rising temperature value after receiving the first temperature information and reading the first temperature value in each first temperature information. For example, under the current heating power, according to the change of the average value of the first temperature values in the first temperature information, when the average value is far higher than the set temperature (such as 30 ℃) of the original boiling water state by another set value, it indicates that the water control valve 25 is closed; or according to the rising slope (K =Δc/Δ S) of the first temperature in the first temperature information, when the rising slope conforms to a predetermined slope, it indicates that the water control valve 25 has been closed currently; or, according to the highest temperature of the first temperature values in the first temperature information, when the highest temperature and the temperature (such as 30 ℃) set by the original boiling water state reach a preset temperature difference, the water control valve 25 is closed currently.
As shown in fig. 2, through the above-mentioned flow, the control unit 24 can determine that the water control valve 25 is in the boiling state (the water flow is non-zero or substantially non-zero) or the water-off state (the water flow is zero or substantially zero).
In order to clearly disclose the temperature adjusting method of the present invention, the following description is made only on the processing flow of the control unit 24 of the present invention, as shown in fig. 2 and 5, the control unit 24 performs the following steps:
(301) The control unit 24 can receive the first temperature information returned by the first temperature sensor 23, and respectively read the first temperature values therein, and enter step (302);
(302) The control unit 24 can obtain the corresponding water flow according to the current heating power of the heating unit 22 and each first temperature value, and enter step (303); it should be noted that the term "obtaining the corresponding water flow rate" is not meant to actually calculate the water flow rate value, but means that the control unit 24 can determine whether the current water flow rate is zero or substantially zero, for example, when the control unit 24 determines whether the current water flow rate is zero or substantially zero according to the falling slope or rising slope of the first temperature value, or according to the average value of the first temperature value, or according to the temperature difference of the first temperature value, \82309, etc., although the water flow rate value is not actually calculated, the control unit 24 still can determine whether the current water flow rate is zero or substantially zero according to the above information to obtain the water boiling state or the water closing state of the water control valve 25. In addition, the term "substantially zero" as used herein means that when the user closes the water control valve 25, the water control valve 25 may not be completely closed because of temperature adjustment, but in the above case, the flow rate of water flowing out of the water control valve 25 is extremely small, which corresponds to no water flow, and thus the water-off state of the present invention is still included.
(303) The control unit 24 determines that the water flow is zero or substantially zero, i.e., a water-off state is recorded, and then the water flow is not zero or substantially non-zero, i.e., a boiled water state is recorded, and then step (304) is performed;
(304) The control unit 24 adjusts (increases or decreases) the current heating power of the heating unit 22 according to the information of the water-off state or the water-boiling state (e.g. the number of times the water control valve 25 is closed or the number of times the water control valve 25 is opened) during a set period (e.g. 5 seconds) to change (increase or decrease) the temperature of the liquid flowing out of the water supply line 21. It is specifically mentioned here that this step can include the interval time of two water opening/closing times in addition to the number of water opening/closing times in a period, for example, the set period is 0.5 second and 1 second, when the user continuously opens or closes the water control valve 25 for a predetermined number of times (for example, 3 times), and the interval time of adjacent times is 0.5 second, it can be heating or cooling, and the interval time of adjacent times is 1 second, it can be cooling or heating. Since the user usually opens the water control valve 25 and only adjusts the temperature after actually sensing the water temperature, the timing unit 241 is started and the subsequent number of times of water boiling or water turning off is recorded after the control unit 24 determines that the water is turned off for the first time (i.e. the water is turned off from the water boiling state) during the setting period, so as to perform the temperature adjustment procedure of this step, wherein the timing unit 241 may be an independent element or may be integrated into the control unit 24. In addition, in other embodiments of the present invention, the user can also adjust the water temperature by using the number of times of boiling water when the water control valve 25 is closed, for example, the user can open or close the water control valve 25 for a predetermined number of times during the setting period before taking a bath, so as to enable the control unit 24 to perform the action of adjusting the temperature.
As mentioned above, according to the temperature adjustment method of the present invention, it is assumed that the water temperature is decreased (e.g., by 0.25 degrees celsius) after the water control valve 25 is closed 2 times (i.e., under the cooling condition) within 5 seconds (a set period); after the water is closed for 3 times (namely, the temperature rise condition), the water temperature is required to be increased (for example, the temperature is increased by 0.25 ℃); when the user feels that the current water temperature is not as expected during bathing and wants to adjust the water temperature (e.g. raise or lower the water temperature), he/she can repeatedly open or close the water control valve 25 within the set period (e.g. 5 seconds), for example, close the water 2 times or close the water 3 times, so as to reduce or increase the heating power of the heating unit 22, thereby lowering or raising the temperature of the liquid flowing out of the water supply pipeline 21 without leaving the current position (e.g. bathroom), and greatly improving the convenience of use.
In addition, in order to help the user to know whether the temperature adjustment setting is completed, as shown in fig. 2, in this embodiment, the electric water heater system 2 further includes a sounding unit 242, the sounding unit 242 is electrically connected to the control unit 24, and when the control unit 24 determines that the temperature-increasing condition is currently satisfied, the sounding unit is enabled to execute a temperature-increasing sound program (e.g., beep); when the control unit 24 determines that the temperature-reducing condition is currently satisfied, the sound-producing unit executes a temperature-reducing sound program (e.g., beeping two sounds) to help the user know that the temperature-regulating program is currently completed, and the water control valve 25 is not continuously opened or closed.
In another embodiment of the present invention, as shown in fig. 6, the electric water heater system 2 further includes a second temperature sensor 26, the second temperature sensor 26 can be located in the main body 20, and can detect the temperature of the liquid and/or the main body 20 substantially identical to the upstream area 21A, and generate corresponding second temperature information, i.e., the second temperature value included in the second temperature information can be the temperature of the liquid and/or the main body 20 that has not been heated. In this embodiment, the second temperature sensor 26 can be disposed at the boundary between the upstream area 21A and the heating area 21B, but not limited thereto, and in other embodiments, the second temperature sensor 26 can be disposed at a position corresponding to the upstream area 21A as long as the detected and obtained temperature is the unheated liquid temperature. The second temperature sensor 26 can be connected to the control unit 24 to transmit each second temperature information to the control unit 24, and when the water control valve 25 is opened, the control unit 24 can receive and read each first temperature information and each second temperature information, and adjust and correct the heating power of the heating unit 22 according to the liquid temperature difference between the upstream area 21A and the downstream area 21C to control the temperature of the water flowing out of the water control valve 25. Furthermore, the water flow rate can also be calculated from the aforementioned liquid temperature difference and the current heating power.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A method capable of adjusting liquid temperature according to water flow information is applied to an electric control water heater system, wherein the electric control water heater system at least comprises a machine body, a water supply pipeline, a heating unit, a first temperature sensor and a control unit, the water supply pipeline is positioned in the machine body and is divided into an upstream area, a heating area and a downstream area, and liquid flows through the upstream area, the heating area and the downstream area in sequence after flowing into the water supply pipeline and then flows out of the water supply pipeline through a water control valve; the heating unit is positioned in the machine body and can heat the liquid flowing through the heating area; the first temperature sensor is positioned in the machine body and can detect the liquid temperature and/or the machine body temperature which are substantially the same as the downstream area and generate corresponding first temperature information; the control unit is positioned in the machine body and is respectively electrically connected with the heating unit and the first temperature sensor so as to open and close the heating unit and receive first temperature information transmitted by the first temperature sensor; the method is to make the control unit execute the following steps:
receiving a plurality of first temperature information transmitted by the first temperature sensor, and respectively reading first temperature values in the first temperature information;
acquiring corresponding water flow according to the current heating power of the heating unit and each first temperature value;
recording a water-off state when the water flow is zero or substantially zero, and recording a boiled water state when the water flow is not zero or substantially non-zero; and
during a set period, the current heating power of the heating unit is increased or decreased according to the information of the water-off state or the water-boiling state, so as to increase or decrease the temperature of the liquid flowing out of the water supply pipeline.
2. The method as claimed in claim 1, wherein the control unit counts the number of times of the water-off state or the water-boiling state during the set period, and increases the heating power of the heating unit to raise the temperature of the liquid flowing out of the water supply line after the number of times satisfies a temperature raising condition.
3. The method as claimed in claim 2, wherein the control unit counts the number of times of the water-off state or the water-boiling state during the set period, and reduces the heating power of the heating unit to lower the temperature of the liquid flowing out of the water supply line after the number of times satisfies a temperature reduction condition.
4. The method of claim 3, wherein the electrically controlled water heater system further comprises a sound unit electrically connected to the control unit, wherein the control unit causes the sound unit to execute a temperature-raising sound program after determining that the temperature-raising condition is currently satisfied; after the control unit judges that the cooling condition is met currently, the control unit enables the sound production unit to execute a cooling sound program.
5. The method of claim 1, wherein the control unit determines that the water control valve is opened or closed according to a variation of an average value of the first temperature values included in the first temperature information after reading the first temperature information transmitted from the first temperature sensor.
6. The method of claim 1, wherein the control unit determines that the water control valve is opened or closed according to a slope change of the first temperature values included in the first temperature information after reading the first temperature information transmitted from the first temperature sensor.
7. A method according to any one of claims 1 to 6, wherein the electrically controlled water heater system further includes a second temperature sensor located in the body, capable of detecting substantially the same liquid temperature and/or body temperature as the upstream region, and generating corresponding second temperature information, and capable of transmitting each of the second temperature information to the control unit.
8. The method according to any one of claims 1-6, wherein the electrically controlled water heater system does not require the use of a flow meter.
9. The method according to any one of claims 1-6, wherein the electrically controlled water heater system comprises a flow meter.
10. The method of claim 8, wherein the first temperature sensor is thermally coupled to the heating unit to detect a temperature of the heating unit, such that the control unit can control a heating power of the heating unit accordingly.
11. The method according to any one of claims 1-6, wherein the heating unit is electrically heated.
12. The method according to any one of claims 1-6, wherein the heating unit is heated by burning fuel.
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| TW110112613A TWI754574B (en) | 2021-04-07 | 2021-04-07 | Method for adjusting liquid temperature based on water flow information |
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| TW202240331A (en) | 2022-10-16 |
| CN115235122B (en) | 2024-06-14 |
| TWI754574B (en) | 2022-02-01 |
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