CN204665632U - A kind of rapid water heating device - Google Patents
A kind of rapid water heating device Download PDFInfo
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- CN204665632U CN204665632U CN201520230536.2U CN201520230536U CN204665632U CN 204665632 U CN204665632 U CN 204665632U CN 201520230536 U CN201520230536 U CN 201520230536U CN 204665632 U CN204665632 U CN 204665632U
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Abstract
The utility model discloses a kind of rapid water heating device, comprise tank shell, described tank shell is provided with water inlet and delivery port, heating element heater is provided with in described tank shell, described heating element heater is connected with thermal control plate, described tank shell is provided with leaving water temperature sensors near water outlet, described tank shell upper water-out mouth place is provided with rectifying cavity, the head induction point of described leaving water temperature sensors and the body of rod are arranged in rectifying cavity, and the distance between described leaving water temperature sensors and heating element heater is 1 ~ 15mm.The utility model by arranging rectifying cavity near water outlet on tank shell, and control the installation site of leaving water temperature sensors, save inflow temperature sensor and flowmeter, simplification device structure, and can accurately utilize leaving water temperature sensors to estimate inflow temperature sensor and flowmeter, and improve temperature control precision and reaction speed, stable and reliable for performance, long service life, and compatible better.
Description
Technical field
The utility model relates to a kind of hot-water heating system, particularly relates to a kind of rapid water heating device, is applicable to the instant hot-water heating systems such as high-end intellectual water closet, Quick heating type little kitchen treasured and shower.
Background technology
Along with development in science and technology and growth in the living standard, Quick heating type little kitchen treasured, shower and intelligent warm water toilet seat start progressively to enter domestic average family.Before rapid water heating device imports application, traditional water mode of heating is water tank heat accumulation mode of heating.Its typical structure generally comprises: a very large heat storage water tank 1 (capacity is greater than 600ml usually), heating element heater 2 in a water tank, water tank bottom has water inlet 3, has delivery port 4 above water tank, delivery port 4 has water level switch 5 and leaving water temperature sensors 6, as shown in Figure 1.Its operation principle is, first opens water inlet 3, cold water is injected heat storage water tank 1, and water level switch 5 indicates water to stop water filling completely afterwards.Then the cool water heating in heating element heater 2 pairs of water tanks, arrives after set temperature until water temperature and stops heating.When water cooling in heat storage water tank 1, again open heating, again close heating when water temperature arrives design temperature, so move in circles.When needs use hot water, open water inlet pipe, in water tank, inject cold water, cold water is upwards released hot water in water tank from delivery port, user obtains the metastable hot water of temperature at short time (10 ~ 60 seconds) inherent delivery port.
On market, typical rapid water heating device generally comprises: a heating water tank housing 100 (capacity is less than 30ml usually), and water tank has a water inlet 101 and a delivery port 102; One or more heating element heater 200, heating power is greater than 1000W usually, one is connected on the flowmeter 300 in water route, one is connected on into the inflow temperature sensor 400 in water water route, one is arranged on the leaving water temperature sensors after heating water tank 100 500, and is connected on the buffer tank after 500 600; Second leaving water temperature sensors 601 be contained on buffer tank 600 or below, the control panel of a set of single loop heating, as shown in Figure 2.Its operation principle is: when needing hot water, and cold water flows through flowmeter 300 from water inlet 301, and enter heating water tank 100, current flow through from heater element surface, and in this process, heating element heater heats immediately to current, and heated water flows out from delivery port.Wherein the power output of heating element heater is by controlling drive circuit board according to flowmeter, inflow temperature sensor, the signal of leaving water temperature sensors and the target temperature of setting, calculates; And at any time according to the change adjustment heater element power of flow, temperature signal, make the change of the quick response traffic of leaving water temperature, temperature, and control in certain accuracy rating.
Rapid water heating device is owing to only just heating in use, not to the water heating and thermal insulation in water tank when not needing hot water, thus more energy-conservation; Owing to not being applicable to the heat storage water tank of bacteria breed, thus much cleaner; Owing to can continue to provide stable warm water for a long time, thus rinse more comfortable; Owing to taking volume much smaller than heat storage water tank, thus the structure of end product can be compacter, smaller and more exquisite more attractive in appearance.In view of this many-sided advantage, rapid water heating device is developing direction and the core component of the product of all moisture heating functions.
In existing rapid water heating device control technology, flowmeter is absolutely necessary element.Rapid water heating device carries out heated in real-time to the current flowing through heating element heater; The power of heating element heater is very large; Heating element heater and the conduction of heating cavity to heat have hysteresis quality; The temperature signal of temperature sensor also has delayed, often can not in time reaction temperature Rapid Variable Design (quick response temperature sensor conventional in toilet seat generally to need after 3 ~ 5 seconds could sense temperature change 63%).In the application, flow, inflow temperature, and the signal of two leaving water temperatures slightly changes, and just must make timely and even prospective adjustment heating power, guarantee that leaving water temperature is within the acceptable range.Otherwise water temperature can be out of control, after crossing cold or overheated water stream contacts human body, can cause that user's is uncomfortable, even cause scaring, scald event (Nippon Press once reported that certain famous intellectual water closet brand generation current scalded user's lower body, the event in hospitalization a few week).
In such rapid water heating device, its flow of inlet water also can suddenly change because of the variation of source pressure, if do not have the control software design of rapid-action flowmeter and dependable performance, leaving water temperature is by out of hand.Such as, when the flow of device is at 700ml/min, inflow temperature is 5 DEG C, leaving water temperature stability contorting 40 DEG C time; The neighbours of user have thrown open the water valve of a large discharge, cause the of short duration decline of dynamic pressure of neighbouring pipeline, thus make the flow of device drop to 300ml/min from 700ml/min in 0.5 second.At this moment because the water temperature of water inlet does not change, though the water temperature in water tank has started to raise, but the water that temperature raises also does not flow to delivery port, the temperature sensor signal of delivery port does not yet change (even if leaving water temperature there occurs faint change, temperature sensor also will after the several seconds could perception 63% temperature rise), control circuit board can not adjust heating power, thus heating element heater is also with original power heating, and outlet temperature will rise violently more than 70 DEG C in second in next.As can be seen here, in order to keep the accurate of leaving water temperature, in time, signal quality is stablized, and the reliable flowmeter of structure is requisite parts in traditional rapid water heating device in a reaction.
In addition, in existing rapid water heating device control technology, inflow temperature sensor is absolutely necessary element.The requirement that the leaving water temperature that intellectual water closet industry heats water responds if having time, after requiring that user carries out associative operation, just energy water outlet in about 8 seconds, the water temperature of current has arrived the design temperature of user simultaneously.Water inlet temperature must be heated to design temperature by corresponding hot-water heating system within 8 seconds, and kept stable.In order to reach the water temperature of setting fast, just must select the heating power that suitable when just starting to heat, this power needs by inflow temperature, flow, and leaving water temperature, target temperature determine.Therefore, inflow temperature sensor is the important leverage making leaving water temperature arrive setting value at short notice, essential.
In existing rapid water heating device control technology, the buffer tank 600 after heating water tank 100 or buffering water route are the optimum choice of improving performance.Because temperature sensor is relative to the large time delay of heating system, water present sensor 500 always will water temperature steadily after the several seconds just can perceive real water temperature, cannot accurate fast-changing leaving water temperature in the perception short time.Thus causing control hysteresis, leaving water temperature shakes up and down, exceeds the receptible excursion of user.Therefore, in traditional design, after heating water tank, place a buffer tank or buffering water route, it is also necessary for doing temperature buffer process to the water temperature of concussion.
In existing rapid water heating device control technology, the second leaving water temperature sensors 601 be contained in buffer tank 600 or afterwards is also the optimum choice of improving performance.From microcosmic, one large current are always by multiply different in flow rate, different thicknesses, and tiny current and the turbulent flow of different temperatures form.Generally speaking, be arranged on temperature sensor in water channel owing to can only touch part weep, therefore corresponding sensor temperature signals can only the mean temperature of reactive moieties weep, can not react the real time temperature of the overall current of flowing fast truly.
In traditional design, because temperature sensor itself has dimensional tolerance, also have alignment error when mounted, between different temperature sensor individualities, inevitably there is signal errors; Simultaneously, due in traditional design, space structure around temperature sensor senses point is not symmetric design, around induction point, the current thickness of all directions, speed are all different, what temperature signal reacted is the ambient temperature of sensor body of rod transmission and the summation of water flow inside temperature, thus, under different flow velocitys, water temperature, environment temperature, the coolant-temperature gage sensed may be more higher or on the low side than actual water temperature.Comparatively speaking, the buffer tank 600 after heater has larger capacity, and water flow velocity is wherein comparatively slow, around the induction point of temperature sensor up and down before and after the water temperature of all directions be substantially identical, around water temperature can not Rapid Variable Design; The body of rod of sensor also can fully be immersed in water tank, reduces the impact of ambient temperature; Thus the temperature sensed is truer.Therefore, in typical design, in buffer tank of being everlasting or in buffering water route, increase a temperature sensor, be used for correcting the deviation of leaving water temperature.
In sum, traditional rapid water heating device is that a sensor is numerous, complex structure, and temperature control precision is high, reacts device fast.It is high to the quality requirement of parts, and size tolerance requirements is high, high to the technological requirement of installing in production process, requires high to the algorithm of software; The reliability of device, comparison of coherence difficulty controls, and the error of any part, installation all may cause the quality problems of whole device.
Because domestic manufacturers start late, pay little attention to technology, Innovation Input is limited, all could not grasp this core technology completely at present.Most domestic product or water tank heat storage type mode of heating, the technology of high-end rapid water heating device mainly monopolizes in the minority foreign capitals High Tier Brand hand represented with Panasonic, eastern Tao Wei, and the domestic high-end product of minority directly have employed the rapid water heating device that manufacturer of Korea S provides.This situation seriously hinders the technology upgrading of domestic high-end water heating products and market is popularized.
The shortcoming of existing rapid water heating device and control method thereof is as follows:
1, the sensor on device is many, the poor reliability of device entirety
Owing to employing 1 flowmeter and 3 temperature sensors, each part has himself signal errors, alignment error, dimensional tolerance, cause the accumulated tolerance of device large, the uncertain factor of signal is many, software control algorithm is complicated, thus affects the global reliability of device.Simultaneously from use industry use experience, continually because of flowmeter stall, breakage, the component problem such as temperature sensor deviation inefficacy cause rapid water heating device normally to work.From the complaint after sale of the high-end intellectual water closet brand of certain foreign capitals, the customer complaint produced because of hot-water heating system fault has accounted for more than 30% of total complaint.
2, leaving water temperature low precision
Because temperature sensor itself has ± the signal errors of about 1 DEG C, the error effect that traditional design also has the factors such as alignment error, changes in flow rate, external environment heat trnasfer to bring; Therefore, although the product of some High Tier Brand can when flow trim, by the undulated control of the leaving water temperature in a period of time within ± 0.5 DEG C, the kelvin rating of its water outlet be still difficult to control setting value ± 2 DEG C in.Namely be provided with same design temperature, be operated in two products under different flow, environment temperature, final leaving water temperature difference may reach 4 DEG C even more than.In order to eliminate the inaccurate harmful effect of this temperature, existing intellectual water closet product does not generally inform that the current leaving water temperature of user is how many, but devise the man-machine interface that can regulate temperature, allow user when being unsatisfied with water temperature, independently can select low-grade temperature, middle-grade temperature, high-grade temperature, thus avoid user to query and complaint.
3, complex structure, is difficult to further reduced volume
Owing to employing 4 sensors, and relevant various sealings, fixed structure, cause complex structure, the wiring of power line, holding wire, order wire is intricate, device profile is irregular, and the volume of rapid water heating device is difficult to reduce further, is unfavorable for the topology layout of end product.
4, easily scaling, the thus shortcoming of reduction of service life in traditional at present hot-water heating system ubiquity heating water tank and on heating element heater.Incrustation scale can affect the transmission efficiency of heat after piling up on the heating element, heating element heater internal temperature is raised, and heating element heater internal-external temperature difference raises.In the handoff procedure that part incrustation scale on heating element heater is opened in heating, stop, being subject to cold and hot temperature shock, can peeling off from heating element heater lastblock block, the heat radiation exacerbating heater surfaces is uneven, and the surperficial zones of different temperature difference is large.The internal-external temperature difference that heating element heater is raising, under the temperature difference of surperficial zones of different and cold water shock, easily causes heating element heater rupture because of thermal stress, thus the service life of shortening device.On the other hand, the relatively large incrustation scale peeled off from heater element surface also easily blocks stream, causes the rapid failure of device equally.
5, part rapid water heating device in the market can not get rid of the bubble in water effectively, bubble is often adsorbed on heater element surface, or in the irregular movement of heater element surface, thus cause heater element surface non-uniform temperature, cause the fluctuated of water flow temperature; Also produce thermal stress simultaneously, accelerate the inefficacy of heating element heater.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of rapid water heating device, can greatly simplify rapid water heating device structure, and improve temperature control precision and reaction speed, stable and reliable for performance, long service life, and compatible better.
The utility model is solve the problems of the technologies described above the technical scheme adopted to be to provide a kind of rapid water heating device, comprise tank shell, described tank shell is provided with water inlet and delivery port, heating element heater is provided with in described tank shell, described heating element heater is connected with thermal control plate, described tank shell is provided with leaving water temperature sensors near water outlet, wherein, described tank shell upper water-out mouth place is provided with rectifying cavity, the head induction point of described leaving water temperature sensors and the body of rod are arranged in rectifying cavity, distance between described leaving water temperature sensors and heating element heater is 1 ~ 15mm.
Above-mentioned rapid water heating device, wherein, described rectifying cavity comprises three sections of cavitys, two sections of mutual second substantially vertical cavity runner pipelines and the 3rd cavity runner pipeline, the head induction point of described leaving water temperature sensors and the body of rod arrange along the bearing of trend of the second cavity runner pipeline and are roughly positioned at the middle position of the second cavity runner pipeline.
Above-mentioned rapid water heating device, wherein, the internal diameter of described first cavity runner pipeline is 0.8 ~ 3 times of body of rod external diameter, and the internal diameter of the second cavity runner pipeline is 1.3 ~ 3 times of body of rod external diameter, and the length of described first cavity runner pipeline is at least 0.2mm.
Above-mentioned rapid water heating device, wherein, described heating element heater is heating tube, is provided with columnar baffle between described heating tube and tank shell, described baffle is provided with along the convex tendon of two before water (flow) direction screw, forms guiding gutter between the convex tendon before described two screws.
Above-mentioned rapid water heating device, wherein, described baffle is spliced by upper semi-deflector and lower semi-deflector, and the gap between described convex tendon and heating tube outer surface is 0.1 ~ 0.8mm; The distance on described baffle inwall and convex tendon top is 1.0 ~ 4mm; Described convex tendon top section is roughly in trapezoidal shape.
Above-mentioned rapid water heating device, wherein, described thermal control plate is at least to have two silicon controlled multiloop thermal control plate, and described controllable silicon is fixed on the heating end of heat radiation copper coin, and the radiating end of described heat radiation copper coin extend in current.
Above-mentioned rapid water heating device, wherein, described heating element heater is two group heater strip ceramic heating pipes, described thermal control plate is double loop thermal control plate, described heating tube has A, B, C tri-electrodes, wherein C is public termination control panel zero line, A and B connects two control loops of thermal control plate respectively.
Above-mentioned rapid water heating device, wherein, described heat radiation copper coin is also provided with temperature fuse and/or temperature controller near radiating end place.
Above-mentioned rapid water heating device, wherein, described temperature fuse is wrapped with insulating sleeve, and described insulating sleeve is wrapped with the metal forming of heat conduction, is provided with enclosing cover outside described metal forming, is provided with the heat insulating filling material preventing from dispelling the heat between described metal forming and enclosing cover.
Above-mentioned rapid water heating device, wherein, be provided with the circular pit for installing temperature controller in the middle of described heat radiation copper coin, offer heat radiation groove bottom described circular pit, described upper semi-deflector is provided with the thermal window with the groove match that dispels the heat.
Above-mentioned rapid water heating device, wherein, be provided with sealed tube sealing between described water inlet and the water inlet end of heating tube, the outer wall of described sealed tube is at least provided with the convex tendon of a radial-sealing, the water entering section of described sealed tube is also provided with the bound edge of fold inward.
The utility model contrast prior art has following beneficial effect: the rapid water heating device that the utility model provides, by arranging rectifying cavity near water outlet on tank shell, and control the installation site of leaving water temperature sensors, thus save inflow temperature sensor and flowmeter, greatly simplify rapid water heating device structure, and leaving water temperature sensors can be utilized exactly to estimate inflow temperature sensor and flowmeter, improve temperature control precision and reaction speed, stable and reliable for performance, long service life, and compatible better.The utility model adds guiding device, avoids the quick formation of incrustation scale, avoids the absorption of bubble in heater, extends the service life of device.In addition, the utility model, also by improving the reaction speed of temperature protective device, makes device have higher security performance.
Accompanying drawing explanation
Fig. 1 is existing heat storage water tank structural representation;
Fig. 2 is existing rapid water heating device structural representation;
Fig. 3 is the utility model rapid water heating device structural representation;
Fig. 4 is the decomposition texture schematic diagram of the utility model rapid water heating device;
Fig. 5 is the head induction point of temperature sensor current schematic diagram when being in water route central authorities;
Fig. 6 is the current schematic diagram of the head induction point of temperature sensor when being in water route inwall below the pipeline;
Fig. 7 is a kind of rectifying cavity structural representation of the utility model rapid water heating device;
Fig. 8 is the other forms of rectifying cavity structural representation of the utility model rapid water heating device;
Fig. 9 is baffle structure in the utility model rapid water heating device and water flow direction schematic diagram;
Figure 10 is the waterway pipe cross-sectional view of the utility model rapid water heating device;
Figure 11 is cross-sectional view after the water outlet of the utility model rapid water heating device;
Figure 12 is tubular heating element and the guide shell cross-sectional view of the utility model rapid water heating device;
Figure 13 is the radiating copper plate structure schematic diagram of the utility model rapid water heating device;
Figure 14 is the radiating effect schematic diagram of the utility model rapid water heating device;
Figure 15 is the baffle structural representation of the utility model rapid water heating device;
Figure 16 is the controllable silicon of the utility model rapid water heating device and the connection diagram of heat sink;
The mounting structure of the thermal cut-off of Figure 17 the utility model rapid water heating device;
Figure 18 is simplification temperature variation curve matching schematic diagram of the present utility model;
Figure 19 be the utility model obtain under different flow moment-temperature rise curve;
Figure 20 is the leaving water temperature response curve of the rapid water heating device of existing band flowmeter;
Figure 21 is the leaving water temperature response curve of rapid water heating device of the present utility model.
In figure:
1 heat storage water tank 2 heating element heater 3 water inlet
4 delivery port 5 water level switch 6 leaving water temperature sensors
100 tank shell 101 water inlet 102 delivery ports
105 protruding 120 end cap 130 baffles
Semi-deflector 132 times semi-deflector 133 convex tendons on 131
134,135 thermal window 136 water export 137 incrustation scales
138 guiding gutter 200 heating element heater 201 sealed tubes
202 sealing ring 203 heating tube water inlet 204 flanges
205 heating tube delivery port 300 flowmeter 400 inflow temperature sensors
500 leaving water temperature sensors 501 head induction point 502 turbulent flows
503 body of rod 600 buffer tank 601 second leaving water temperature sensors
700 thermal control plate 701,702 controllable silicon 703,704 screws
800 rectifying cavity 801 first cavity runner pipelines
802 second cavity runner pipelines 900 dispel the heat copper coin 901 temperature fuse
902 insulating sleeve 903 metal forming 904 enclosing covers
905 insulation filler 907 tapping screw 908 radiating ends
909 heating end 910 temperature controller 911 circular pit
912,913 heat radiation grooves
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model will be further described.
Fig. 3 is the utility model rapid water heating device structural representation.
Refer to Fig. 3, the rapid water heating device that the utility model provides, comprise tank shell 100, described tank shell 100 is provided with water inlet 101 and delivery port 102, heating element heater 200 is provided with in described tank shell 100, described heating element heater 200 is connected with thermal control plate 700, described tank shell 100 is provided with leaving water temperature sensors 500 near delivery port 102 place, wherein, described tank shell 100 is provided with rectifying cavity 800 near delivery port 102 place, the head of described leaving water temperature sensors 500 is arranged in rectifying cavity 800, distance between described leaving water temperature sensors 500 and heating element heater 200 is 1 ~ 15mm.Water inlet 101 can be positioned on end cap 120, as required, water inlet 101 can towards left, upward or towards right installation, facilitate user to select the direction that intakes.
The rapid water heating device that the utility model provides, by arranging rectifying cavity 800 near water outlet 102 on tank shell 100, and control the installation site of leaving water temperature sensors 500, thus save inflow temperature sensor and flowmeter, greatly simplify rapid water heating device structure, even if when current are very little, the temperature fluctuation on heating element heater 200 is also partly arrived by temperature sensor senses by the bulking effect of water body and heat-conduction effect, adds the reaction speed of temperature.
The temperature of the head induction point 501 of temperature sensor is not only subject to the impact of the ambient temperature that the body of rod transmits, and is also directly subject to the ambient temperature interference of turbulent flow 502 and the transmission of water route inwall.As shown in Figure 5, the head induction point 501 of temperature sensor is at the middle part in water route, and below it, current are the fastest, and above it, current are slower; Its error mainly comes from the heat trnasfer of the body of rod and ambient temperature above induction point.And in figure 6, due to close water route inwall below head induction point 501, gap slight drag is large, therefore water velocity is little, compared to Fig. 5, temperature signal further increases ambient temperature and is disturbed by the heat trnasfer of tube wall.Rectifying cavity 800 of the present utility model comprises some sections of mutual substantially vertical runner pipelines, and the body of rod of described leaving water temperature sensors 500 arranges along the bearing of trend of interlude runner pipeline and is roughly positioned at the middle position of interlude runner pipeline.This reshaping structure makes current flow into from temperature sensor body of rod postmedian, and then current are along body of rod flow direction sensor head, finally flows out along water route, as shown in Figure 7; Or this reshaping structure makes current flow into from sensor head, current flow to body of rod postmedian along the body of rod, finally flow out along water route.Specifically, described rectifying cavity 800 comprises the first cavity runner pipeline 801 and two sections of mutual second substantially vertical cavity runner pipeline 802 and the 3rd cavity runner pipelines 803, the head induction point 501 of described leaving water temperature sensors 500 and the body of rod 503 arrange along the bearing of trend of the second cavity runner pipeline 802 and are roughly positioned at the middle position of the second cavity runner pipeline 802, except Fig. 7, rectifying cavity 800 can also select in Fig. 8 three kinds of multi-form rectifying cavity.The internal diameter of described first cavity runner pipeline 801 is 0.8 ~ 3 times of the body of rod 503 external diameter, and the internal diameter of the second cavity runner pipeline 802 is 1.3 ~ 3 times of the body of rod 503 external diameter, and the length of described first cavity runner pipeline 801 is at least 0.2mm, as shown in Figure 8.Distance D between described leaving water temperature sensors 500 and heating element heater 200 is 1 ~ 15mm, the body of rod and induction point are in runner central authorities, when the current that thermal capacity is large flow fast through around the body of rod, eliminate the externally temperature influence brought by runner tube wall and body of rod heat trnasfer in time, therefore, it is possible to reflect the water temperature of real-time change quickly and accurately.
The rapid water heating device that the utility model provides, between the water inlet 203 of intake end cover 120 and heating tube 200, seals with a caulking gum pipe 201.Seal with sealing ring 202 between the square flange 204 of heating tube 200 and water tank.With four screws, intake end cover 120, flange 204 and water tank are fixed together.Have baffle 130 between heating tube and water tank, baffle 130 by upper semi-deflector 131 and lower semi-deflector about 132 two semi-synthetic, the flow direction of current is as shown in Figure 9.Baffle 130 inside also has the spiral convex rib 133 guiding current, forms guiding gutter, enable current at heating tube perficial helical flow forward between spiral convex rib.Delivery port 136 is arranged at the guiding gutter top of baffle last lap, and current flow to rectifier structure 800 from here.
Please continue see Figure 10 and Figure 11, current of the present utility model are flowed into by water inlet 101 and arrive intake end cover 120, after caulking gum pipe 201, enter heating tube water inlet 203 inner, after flowing to heating tube delivery port 205, out forward heating tube outer surface to from heating tube inside, after the guiding of baffle 130 (by 131,132 synthesis), flow to delivery port at heating tube outer surface spiral rotating.Current are through the arrangement of rectifying cavity 800, and current flow into from temperature sensor 500 head, and along bar, upwards flow in portion, finally flows out from delivery port 102.
Figure 12 shows the internal structure of the inner heating tube delivery port 205 of water tank.The axial location of heating tube in water tank not only fixed by the screw at heating tube flange 204 place, also secures the radial position at flange 204 place simultaneously; The radial position at heating tube delivery port 205 place is fixed by the projection 105 of water tank inside.The radial position of baffle 130 in water tank is determined by the minor diameter fit of its external diameter and water tank internal cavity.Ensure during design that gap d between the convex tendon of baffle and heating tube outer surface is between 0.1 ~ 0.8mm, preferred about 0.3mm; The distance on baffle inwall and convex tendon top is between 1.0 ~ 4mm; Convex tendon top section is roughly in trapezoidal shape, and trapezoidal upper, just to heating element heater, reduces possible effective contact surface.Such convex tendon 133 both can not encounter heater surface and temperature distortion, also the major part of flow can not be occupied from the flow of the leakage gap between convex tendon and heater, ensure that most of water yield is along guiding gutter flowing, the turbulent flow in reduction leakage flow is on the impact of leaving water temperature.
The utility model, when using tubular heating element, owing to adding columnar baffle 130 between heating element heater 200 and tank shell 100, baffle 130 has along the convex tendon 133 before water (flow) direction screw; Article two, form guiding gutter between spiral convex rib, current can be made along guiding gutter, along tubular heating element outer surface to exit rotational flow.Under certain flow, because current become helical flow from streamlined flow, water route is elongated, adds water velocity, reduces the temperature on heater surface, decreases the generation of incrustation scale 137 and bubble.Meanwhile, the scale particles generated and bubble can also wash away by rotary water current in time that flow fast at heater element surface, and surface temperature rises because dispelling the heat bad to avoid heating element heater 200, improves the life-span of element.Current are after the flowing of heating element heater 200 perficial helical, and force water temperature in the distribution of stable gradient in runner, the water temperature of water inlet is minimum, progressively improves along water (flow) direction temperature, reaches the highest at delivery port.The characteristic of this water temperature gradient distribution, significantly reduces the thermal inertia of device in heating process, makes device quicker to flow, changed power reaction; Improve again on the other hand the antijamming capability of device, reduce turbulent flow, power disturbance on the impact of leaving water temperature.
Figure 13 is the radiating copper plate structure schematic diagram of the utility model rapid water heating device; Figure 14 is the radiating effect schematic diagram of the utility model rapid water heating device.
Refer to Figure 13 and Figure 14, heat radiation copper coin 900 of the present utility model can integrated punching shaping.909 for connecting silicon controlled heating end, and 908 is radiating ends of heat radiation copper coin.The number of radiating end 908 can be multiple, ensures fully to contact with current, and there is a circular pit 911 centre, is used for installing temperature controller 910.Also have the groove 912 and 913 of punching press bottom 911, be used for extending to baffle inside, fully contact with current, improve radiating efficiency.The radiating end 908 of heat sink can be fixed on separately as required in water stream, in heating channel, in water outlet stream, or is fixed in above more than 2 or 2 streams simultaneously.When the radiating end 908 of heat sink is fixed in heating channel or water outlet stream, can be fixed on heat sink by temperature controller 910, the thermal conductivity utilizing radiator good monitors abnormal temperature rapidly.When heating circuit fault and continuous heating time, the heat that device internal heat and controllable silicon place have little time to distribute can all be delivered on temperature controller by fin in time, make the timely action of temperature controller, thus reach the object of quick restraint device internal temperature and the highest water temperature in exit.
Figure 15 is the baffle structural representation of the utility model rapid water heating device.
Refer to Figure 15, baffle 130 of the present utility model is made up of 131 and 132 two halves, also has thermal window 134 and 135 on 131, is used for installing the heat radiation groove 912 and 913 of fin 900.Thermal window is arranged in the last 3rd and Article 2 water conservancy diversion runner, and radiating groove 912,913 fully contacts with current, and from heating tube distance very close to, about 3mm.During normal heating, the temperature of radiating end 908 is a little less than leaving water temperature.When water temperature inside is too high, overheated water temperature can be delivered to radiating end 908 rapidly; During the anhydrous dry combustion method of heating tube, heat also can radiation fast or by Water Vapor Transmission on radiating end 908; Therefore being arranged on temperature controller 910 on copper coin and thermal cut-off 901 can both action in time, plays the effect that dual safety cuts off heating circuit.
Figure 16 is the controllable silicon of the utility model rapid water heating device and the connection diagram of heat sink.
Refer to Figure 16, controllable silicon 701 and 702 of the present utility model is arranged on control panel side by side, and radiating surface upward; The heating end 909 of its radiating surface and heat sink is fixed with screw 703 and 704.Temperature fuse 901 outer wrapping insulating sleeve 902, the metal forming 903 of insulating sleeve 902 outer wrapping heat conduction, directly and heat sink 900 close contact, enclosing cover 904 covers outside metal forming 903 metal forming 903, also add the heat insulating filling material 905 preventing from dispelling the heat between metal forming 903 and enclosing cover 904.Enclosing cover 904, filler 905, insulating sleeve 902, fuse 901 are closely fixed on heat radiation copper coin 900 by tapping screw 907, as shown in figure 17.
The rapid water heating device that the utility model provides, by arranging rectifying cavity 800 near water outlet on tank shell 100, and control the installation site of leaving water temperature sensors 500, thus save inflow temperature sensor and flowmeter, greatly simplify rapid water heating device structure.
The solid stream gauge used in water heater at present has two kinds, infrared signal flowmeter and magnetic signal flowmeter, and two kinds of flowmeters have a shell, and water inlet, a delivery port, enclosure interior has impeller, and hull outside has inductor.When current overcurrent gauge is inner, water flow energy promotes vane rotary, and the impeller of rotation makes the infrared signal on sensing element or magnetic signal change, the fast long response time of the signal intensity speed of wheel speed.
The flowmeter shell of infrared signal is transparent, exports infrared light, through housing, received by the receiver of another side the lasting of shell; During vane rotary, the impeller of rotation ceaselessly can stop infrared ray, and infrared receiver just have received the infrared signal of not stopping break-make.According to the frequency of infrared signal break-make, the rotating speed of known impeller.
Magnetic signal flowmeter shell is generally opaque, and impeller can install at least pair of magnet, and the magnetic pole installation direction of often pair of magnet is contrary.A magnetic pole sensing element is had outside shell.During vane rotary, sensing element can sense the change of magnetic pole N, S pole, measure the frequency of change also with regard to the rotating speed of known impeller.
Because the rotating speed of impeller and flow have the direct ratio corresponding relation of substantial linear within the specific limits, the frequency being therefore aware of signal intensity also just roughly obtains flow.Because the relation between signal intensity frequency and flow is not completely linear, therefore the application condition of this flowmeter is large, generally has the measure error of 10 ~ 30% in the scope of application.When current are less, current are very little to the thrust of impeller, and impeller is not easy to turn over; After turning over, rotating speed is also easily subject to the impact of turbulent flow, fluctuates very large.When in current, impurity is more, or when impeller attached to incrustation scale, microbial thin film, the resistance of wheel rotation can increase, and flow signal can diminish or not have; When containing air in current, resistance during wheel rotation in gas-vapor mix fluid diminishes, and impeller can be made to accelerate to rotate, and flow signal can become large; Bubble can also make IR produce abnormal refraction, scattering, affects ultrared reception, causes flow signal mistake.
In use for some time, due to meeting inevitably precipitated impurities and microorganism in flowmeter shell, the housing of infrared signal flowmeter can become opaque gradually, affects passing through of IR, causes flowmeter to lose efficacy.Magnetic signal flowmeter is inner due to containing magnet, easily magnetic metal oxide impurities in absorption current, the settling velocity of accelerating impurity on impeller, thus causes the slack-off or stall of wheel speed, the inefficacy of acceleration flowmeter.
The above shortcoming of current solid stream gauge, in the industry, there is no solution effectively reliably, be known technical barrier in the industry.The rapid water heating device that the utility model provides, by arranging rectifying cavity 800 near water outlet on tank shell 100, and control the installation site of leaving water temperature sensors 500, the body of rod 503 and head induction point 501 is made to be in rectifying cavity 800 runner central authorities, ensure that the current that thermal capacity is large flow fast through around the body of rod, eliminate the externally temperature influence brought by runner tube wall and body of rod heat trnasfer in time, therefore, it is possible to reflect the water temperature of real-time change quickly and accurately, and leaving water temperature sensors can be utilized exactly to estimate inflow temperature and flow.
After the utility model omits solid stream gauge, flow V
tobtain by estimation with heating power Wt, and the correction that circulates mutually in calculating process, primary flow V
0when being opened by heating, according to temperature rise change, inquiry moment-flow-temperature rise curve determines, primary power W
0by primary flow V
0determine.The control method of rapid water heating device of the present utility model, comprises the steps:
A) leaving water temperature and inflow temperature is obtained; Described inflow temperature obtains according to leaving water temperature estimation, and estimation process is as follows: close heating element heater, allow cold water flow through described rapid water heating device; Through after a period of time, the temperature that described leaving water temperature sensors measures is inflow temperature, due in the process of whole heating, actual inflow temperature change is very little, small change can not control to cause harmful effect to the temperature of system, therefore in whole heating process, no longer can detect inflow temperature, acquiescence inflow temperature remains unchanged.
B) according to leaving water temperature and inflow temperature estimated flow;
Described inflow temperature and leaving water temperature can be revised according to the different segmentations of temperature signal rate of change.Temperature adjustmemt process is as follows: T
t'=T
t+ k* (T
t-T
t-1), T
t,t
t-1for actual measurement water temperature or the estimation water temperature in t, t-1 moment, T
t' be the correction water temperature of t, k is temperature correction coefficient; When temperature signal rate of change is less than pre-set threshold value, the temperature of temperature value to t in t-2 moment is adopted to revise, T
t'=T
t+ k/2* (T
t-T
t-2).The span of described temperature correction coefficient k obtains in the following way:
Be T by initial temperature
0temperature sensor to put into temperature be fast T
targetwater in;
Sampling obtains actual temperature change curve T;
Each sampled point on curve T, calculates Δ T=T
t-T
t-1, then calculate correction value k* Δ T; Find the value suitably selecting k, when the absolute value of Δ T is larger, k gets larger value ka, and when the absolute value of Δ T is medium, k gets medium value kb, and when the absolute value of Δ T is less, k gets smaller value kc, can obtain another curve T ', as shown in figure 18.This curve, substantially between actual temperature line Ttarget and temperature signal curve T, can reflect actual temperature Ttarget quickly, more realistically than temperature signal curve, thus become an effective fair curve.When experiment finds that the value of k is between 1 ~ 8, the interference of temperature signal can either be eliminated preferably, also can control ground requirement by satisfied temperature rapidly.Wherein: T
tthe water temperature in a certain moment, T
t-1the water temperature in a upper moment, T
t-2t
t-1the water temperature in previous moment.T
twith T
t-1between, T
t-1with T
t-2between all interval time t
c.Test by experiment, select t
cduring=τ/8 ~ τ/40, can make device can the requirement that responds fast of satisfied temperature, again can the requirement of satisfied temperature accuracy.τ is the response time of temperature sensor.
In practical application, t
ccan in the scope of τ/8 ~ τ/40 unrestricted choice; τ, t
cafter determining, use T=T
0+ Δ T* (1-e
(-t/ τ)) predication method, or the method for experiment test, draws temperature signal curve and actual temperature curve.Between signal curve and temperature curve and the rate of change of temperature determine, with can determination of experimental method.Again as required, suitable fair curve is drawn; Then according to the different range of slope, fair curve is simplified with the formula of reduction of two or more different coefficients.Preferably, when selecting the temperature sensor of τ=3 second, select t simultaneously
cwhen=0.12 second, temperature response curve can be modified to following three sections:
The absolute value of temperature signal rate of change is 25 ~ 3.2 DEG C/sec time: T
t'=T
t+ 6* (T
t-T
t-1);
When the absolute value of temperature signal rate of change is within the scope of 1.6 DEG C/sec ~ 3.2 DEG C/sec: T
t'=T
t+ 5* (T
t-T
t-1);
During the absolute value <=1.6 DEG C/sec of temperature signal rate of change: T
t'=T
t+ 1.5* (T
t-T
t-2); Namely, when root temperature signal rate of change is less than pre-set threshold value, the temperature of temperature value to t in t-2 moment is adopted to revise, T
t'=T
t+ k/2* (T
t-T
t-2).
C) inflow temperature, flow and leaving water temperature is utilized to regulate the heating power of heating element heater.
The heating power W of t
tbe calculated as follows:
W
t=W
t-1+ K
w* V
t* (target temperature-leaving water temperature Tout ');
Just start power W when heating
0=K
0* V
0* (target temperature-inflow temperature Tin ');
COEFFICIENT K
w=4.2 joules/(milliliter * DEG C), W
t-1add thermal output for the t-1 moment, unit is joule/second, V
tfor the flow of t, unit is milliliters/second, and Tout ' is revised leaving water temperature, and Tin ' is revised inflow temperature, and unit is DEG C.Just start power W when heating
0calculated by following methods:
W
0=K
0* V
0* (target temperature-leaving water temperature Tin ');
Wherein COEFFICIENT K
0span be 0.6 ~ 3, in order to accelerate the rate of climb of water temperature, K
0should 1 be greater than, but be generally no more than 3, otherwise it is overheated to have water temperature, has little time the risk controlled.
Just start flow V when heating
0inquired about by following methods and obtain:
First do not open heating, allow current through device, after waiting the signal stabilization on leaving water temperature sensors, the water temperature now detected is inflow temperature Tin, and is modified to Tin ' by the method for claim 14; Open heating again, heating element heater sends fixing heat Q; Through after a period of time, at t
1moment measures temperature rise Δ T, according to existing moment-temperature rise-flow three-dimensional table, generally can distinguish flow now.
In order to calculate flow more exactly, preferably, can at t
1, t
2, t
3three moment measure water temperature, and calculate Δ T
1=T
1-T
0, Δ T
2=T
2-T
0, Δ T
3=T
3-T
0.According to existing moment-temperature rise-flow three-dimensional table, adopt the algorithm of comparison identification, reliable initial flow accurately can be extrapolated.T
1, t
2, t
3the temperature rise flex point moment of the maximum stream flow of actual flow scope, intermediate flow, minimum discharge can be selected respectively.
Flow signal needed for the utility model control temperature is calculated by the change of leaving water temperature and draws, method is as follows:
1) heating starts the mensuration of front initial flow: after when heating element heater, evolution of heat Q also stops heating subsequently at short notice, partial heat Q
1temp of heating element will be made to increase, another part heat Q
2will be delivered in current, cause water flow temperature to rise.
Because water is in heater element surface flowing, current P
1near outlet, when it flows through heater element surface, the temperature of heating element heater inside is not also transmitted out, and it is by the shortest time heated, therefore P
1when flowing to delivery port, temperature rises few; The distance that current flow at heater element surface is longer, and it has higher water temperature after flowing to delivery port; If the heat major part of heating element heater is taken away by current, temperature declines, then temperature during current arrival delivery port is low on the contrary.As can be seen here, after heating element heater starts heating, under different flows, through the identical time, it is different that current arrive sensing station, then water flow temperature is different.According to the water temperature measured, flow now instead can be pushed away.
1.1 determinators under various flow moment-temperature rise curve
Before heating, the current of inflow device are regulated at a fixing value V
1, after the signal stabilization on leaving water temperature sensors, record now water temperature T
0; Then the short time opens heating, and heating element heater stops heating after sending fixing heat Q; Detect a water temperature T at set intervals
1, T
2, T
3, T
4,deng, calculate not temperature rise Δ T in the same time
1=T
1-T
0, Δ T
2=T
2-T
0..., obtaining flow velocity is V
1time time m-temperature rise table.To current be regulated at a fixing value V again
2, repeat above method, obtaining flow velocity is V
2time time m-temperature rise table.Repeat above testing procedure, can obtain under different flow moment-temperature rise curve, as shown in figure 19, transverse axis is sampling instant, the longitudinal axis is temperature rise, flow V6>V5>V4>V3Gre atT.GreaT.GTV2>V1.
The flow of 1.2 estimation devices
During calculated flow rate, first do not open heating, allow current through device, after waiting the signal stabilization on leaving water temperature sensors, record now water temperature T
0; Open heating again, heating element heater sends fixing heat Q; Through after a period of time, at t
1moment measure temperature rise, according to existing moment-temperature rise-flow three-dimensional table, generally can distinguish flow now.
In order to calculate flow more exactly, preferably, can at t
1, t
2, t
3three moment measure water temperature, and calculate Δ T
1=T
1-T
0, Δ T
2=T
2-T
0, Δ T
3=T
3-T
0.According to existing moment-temperature rise-flow three-dimensional table, adopt the algorithm of comparison identification, reliable initial flow accurately can be extrapolated.T
1, t
2, t
3the temperature rise flex point moment of the maximum stream flow of actual flow scope, intermediate flow, minimum discharge can be selected respectively.
2) in heating process, when flow and temperature rise are stablized constant, the formula proving of flow:
Average discharge V=mean power P/ (4.2* (leaving water temperature T
out'-inflow temperature T
in'))
3) flow rate calculation in heating process during changes in flow rate:
Due to the large time delay of heating element heater and temperature sensor, instant flow cannot draw according to real-time power and temperature rise simple computation.Measure discovery by experiment, in a specific heating system, the flow in a certain moment and the relation of temperature rise can be similar to and be reduced to:
Flow V
t=nominal power P
t/ (4.2* temperature rise Δ T)
=> is nominal power P wherein
t=(Kv*P
t-1+ Wt)/(Kv+1)
＝〉V
t＝(Kv*P
t-1+Wt)/((Kv+1)*4.2*ΔT)
＝〉V
t＝(Kv*P
t-1+Wt)/((Kv+1)*4.2*(T
out’-T
in’))
P
trepresent present nominal power, P
t-1represent the nominal power in a moment, T
out' calculate the present leaving water temperature arrived, T
in' be inflow temperature; Kv is a constant relevant to system, and mainly relevant with the heat transfer coefficient of the capacity of heating water tank, the response time of temperature sensor and heater, span, between 2 ~ 200, needs experimentally to measure.
Preferably, when the capacity of device is at about 10 milliliters, heating power is at about 1600W, adopt aluminium oxide ceramics heating element heater, and when effective heating surface area of heating element heater is 16 ~ 30 square centimeters, when to get Kv be 4 ~ 6, the response speed of the flow Vt calculated is relatively good, and the temperature control effect of device is better.
Wt represents present heating power, relevant to the difference of the heating power in a upper moment, present flow, actual temperature and target temperature, and its algorithm can build by traditional pid algorithm, fuzzy algorithmic approach, also can calculate with simple formula:
W
t=W
t-1+ COEFFICIENT K
w* flow V
t* (target temperature-leaving water temperature T
out');
Flux unit is milliliters/second, and temperature unit is DEG C, COEFFICIENT K
w=4.2 joules/(milliliter * DEG C), power unit is watt (joule/second); W
tfor present adds thermal output, W
t-1thermal output is added, V for upper one-period
tfor present flow, T
out' be according to present temperature signal Tout
tcalculate the present leaving water temperature arrived.
Flow during flow, changes in flow rate when initial before can extrapolating in heater heating by above method flow, working stability.Namely, under arbitrary operational state, flow is all change according to leaving water temperature and can knows by inference; Thus make, when there is no solid stream gauge, also can reach the object of stability contorting leaving water temperature.
Therefore the error of the temperature signal of temperature sensor is about 1%, and the error of power is generally less than 5%, the precision of the average discharge therefore calculated is easy to accomplish to be less than 8%.On this basis, temperature sensor increases rectifying cavity, promote temperature interference free performance and to after the susceptibility of variations in temperature, again according to temperature signal rate of change, according to control method of the present utility model, can induce the variable quantity of flow rapidly, reaction speed is poor unlike solid stream gauge, can meet the control overflow of rapid water heater.Figure 20 surveys certain foreign capitals brand intellectual water closet when harsher duty (5 DEG C of inflow temperatures, flow 300 ml/min), leaving water temperature response curve when design temperature changes between 39,37,35 DEG C.Figure 21 is under same duty, uses same temperature sensor, after using rapid water heating device of the present utility model instead, and the leaving water temperature response curve measured.Relatively two figure are known, the utility model when few used flow to take into account two temperature sensors, the indexs such as response time, temperature fluctuation, temperature accuracy have all had very large improvement than traditional design on the contrary.
Although the utility model discloses as above with preferred embodiment; so itself and be not used to limit the utility model; any those skilled in the art; not departing from spirit and scope of the present utility model; when doing a little amendment and perfect, therefore protection domain of the present utility model is when being as the criterion of defining with claims.
Claims (11)
1. a rapid water heating device, comprise tank shell (100), described tank shell (100) is provided with water inlet (101) and delivery port (102), heating element heater (200) is provided with in described tank shell (100), described heating element heater (200) is connected with thermal control plate (700), described tank shell (100) is upper is provided with leaving water temperature sensors (500) near delivery port (102) place, it is characterized in that, described tank shell (100) upper water-out mouth (102) place is provided with rectifying cavity (800), head induction point (501) and the body of rod (503) of described leaving water temperature sensors (500) are arranged in rectifying cavity (800), distance between described leaving water temperature sensors (500) and heating element heater (200) is 1 ~ 15mm.
2. rapid water heating device as claimed in claim 1, it is characterized in that, described rectifying cavity (800) comprises the first cavity runner pipeline (801) and two sections of mutual second substantially vertical cavity runner pipelines (802) and the 3rd cavity runner pipeline (803), and the head induction point (501) of described leaving water temperature sensors (500) and the body of rod (503) arrange along the bearing of trend of the second cavity runner pipeline (802) and are roughly positioned at the middle position of the second cavity runner pipeline (802).
3. rapid water heating device as claimed in claim 2, it is characterized in that, the internal diameter of described first cavity runner pipeline (801) is 0.8 ~ 3 times of the body of rod (503) external diameter, the internal diameter of described second cavity runner pipeline (802) is 1.3 ~ 3 times of the body of rod (503) external diameter, and the length of described first cavity runner pipeline (801) is at least 0.2mm.
4. rapid water heating device as claimed in claim 1, it is characterized in that, described heating element heater (200) is heating tube, columnar baffle (130) is provided with between described heating tube and tank shell (100), described baffle (130) is provided with along the convex tendon of two before water (flow) direction screw (133), forms guiding gutter between the convex tendon (133) before described two screws.
5. rapid water heating device as claimed in claim 4, it is characterized in that, described baffle (130) is spliced by upper semi-deflector (131) and lower semi-deflector (132), and the gap between described convex tendon (133) and heating tube outer surface is 0.1 ~ 0.8mm; The distance on described baffle inwall and convex tendon (133) top is 1.0 ~ 4mm; Described convex tendon (133) top section is roughly in trapezoidal shape.
6. rapid water heating device as claimed in claim 5, it is characterized in that, described thermal control plate (700) is at least to have two silicon controlled multiloop thermal control plate, described controllable silicon is fixed on the heating end (909) of heat radiation copper coin (900), and the radiating end (908) of described heat radiation copper coin (900) extend in current.
7. rapid water heating device as claimed in claim 6, it is characterized in that, described heating element heater (200) is two group heater strip ceramic heating pipes, described thermal control plate (700) is double loop thermal control plate, described heating tube has A, B, C tri-electrodes, wherein C is public termination control panel zero line, A and B connects two control loops of thermal control plate (700) respectively.
8. rapid water heating device as claimed in claim 6, is characterized in that, described heat radiation copper coin (900) is upper is also provided with temperature fuse (901) and/or temperature controller (910) near radiating end (908) place.
9. rapid water heating device as claimed in claim 8, it is characterized in that, described temperature fuse (901) is wrapped with insulating sleeve (902), described insulating sleeve (902) is wrapped with the metal forming (903) of heat conduction, be provided with enclosing cover (904) outside described metal forming (903), between described metal forming (903) and enclosing cover (904), be provided with the heat insulating filling material (905) preventing from dispelling the heat.
10. rapid water heating device as claimed in claim 8, it is characterized in that, the circular pit (911) for installing temperature controller (910) is provided with in the middle of described heat radiation copper coin (900), described circular pit (911) bottom offers heat radiation groove (912,913), described upper semi-deflector (131) is provided with and the thermal window of the groove match that dispels the heat (134).
11. rapid water heating devices as claimed in claim 4, it is characterized in that, sealed tube (201) sealing is provided with between described water inlet (101) and the water inlet end of heating tube, the outer wall of described sealed tube (201) is at least provided with the convex tendon of a radial-sealing, the water entering section of described sealed tube (201) is also provided with the bound edge of fold inward.
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| CN201520230536.2U CN204665632U (en) | 2015-04-16 | 2015-04-16 | A kind of rapid water heating device |
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| CN104776587A (en) * | 2015-04-16 | 2015-07-15 | 秦伟君 | Rapid water heating device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104776587A (en) * | 2015-04-16 | 2015-07-15 | 秦伟君 | Rapid water heating device and control method thereof |
| CN104776587B (en) * | 2015-04-16 | 2017-11-24 | 嘉兴志嘉智能电器有限公司 | A kind of rapid water heating device and its control method |
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| US10448762B2 (en) | 2017-09-15 | 2019-10-22 | Kohler Co. | Mirror |
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| US11093554B2 (en) | 2017-09-15 | 2021-08-17 | Kohler Co. | Feedback for water consuming appliance |
| US11099540B2 (en) | 2017-09-15 | 2021-08-24 | Kohler Co. | User identity in household appliances |
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| CN108224754A (en) * | 2018-03-19 | 2018-06-29 | 台州福洁科技有限公司 | I.e. hot heating unit and the intelligent closestool with the i.e. hot heating unit |
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Effective date of registration: 20160523 Address after: 314031, No. 4, building 9, building 321, Shanghai Jiaotong University (Jiaxing) Science Park, Jiaxing, Xiuzhou, Zhejiang Patentee after: Jiaxing Chi Smart Electrical Appliance Co., Ltd. Address before: 214194 Jiangsu Province, Wuxi city Xishan District Xi Beizhen Xin Ming Cun ditch No. 55 Patentee before: Qin Weijun |